clients/window.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  * Copyright © 2012-2013 Collabora, Ltd.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that copyright
   8  * notice and this permission notice appear in supporting documentation, and
   9  * that the name of the copyright holders not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  The copyright holders make no representations
  12  * about the suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  17  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  20  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  21  * OF THIS SOFTWARE.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <stdint.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <stdarg.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32 #include <unistd.h>
  33 #include <errno.h>
  34 #include <math.h>
  35 #include <assert.h>
  36 #include <time.h>
  37 #include <cairo.h>
  38 #include <sys/mman.h>
  39 #include <sys/epoll.h>
  40 #include <sys/timerfd.h>
  41
  42 #ifdef HAVE_CAIRO_EGL
  43 #include <wayland-egl.h>
  44
  45 #ifdef USE_CAIRO_GLESV2
  46 #include <GLES2/gl2.h>
  47 #include <GLES2/gl2ext.h>
  48 #else
  49 #include <GL/gl.h>
  50 #endif
  51 #include <EGL/egl.h>
  52 #include <EGL/eglext.h>
  53
  54 #include <cairo-gl.h>
  55 #else /* HAVE_CAIRO_EGL */
  56 typedef void *EGLDisplay;
  57 typedef void *EGLConfig;
  58 typedef void *EGLContext;
  59 #define EGL_NO_DISPLAY ((EGLDisplay)0)
  60 #endif /* no HAVE_CAIRO_EGL */
  61
  62 #include <xkbcommon/xkbcommon.h>
  63 #include <wayland-cursor.h>
  64
  65 #include <linux/input.h>
  66 #include <wayland-client.h>
  67 #include "../shared/cairo-util.h"
  68 #include "xdg-shell-client-protocol.h"
  69 #include "text-cursor-position-client-protocol.h"
  70 #include "workspaces-client-protocol.h"
  71 #include "../shared/os-compatibility.h"
  72
  73 #include "window.h"
  74
  75 struct shm_pool;
  76
  77 struct global {
  78         uint32_t name;
  79         char *interface;
  80         uint32_t version;
  81         struct wl_list link;
  82 };
  83
  84 struct display {
  85         struct wl_display *display;
  86         struct wl_registry *registry;
  87         struct wl_compositor *compositor;
  88         struct wl_subcompositor *subcompositor;
  89         struct wl_shm *shm;
  90         struct wl_data_device_manager *data_device_manager;
  91         struct text_cursor_position *text_cursor_position;
  92         struct workspace_manager *workspace_manager;
  93         struct xdg_shell *xdg_shell;
  94         EGLDisplay dpy;
  95         EGLConfig argb_config;
  96         EGLContext argb_ctx;
  97         cairo_device_t *argb_device;
  98         uint32_t serial;
  99
 100         int display_fd;
 101         uint32_t display_fd_events;
 102         struct task display_task;
 103
 104         int epoll_fd;
 105         struct wl_list deferred_list;
 106
 107         int running;
 108
 109         struct wl_list global_list;
 110         struct wl_list window_list;
 111         struct wl_list input_list;
 112         struct wl_list output_list;
 113
 114         struct theme *theme;
 115
 116         struct wl_cursor_theme *cursor_theme;
 117         struct wl_cursor **cursors;
 118
 119         display_output_handler_t output_configure_handler;
 120         display_global_handler_t global_handler;
 121         display_global_handler_t global_handler_remove;
 122
 123         void *user_data;
 124
 125         struct xkb_context *xkb_context;
 126
 127         uint32_t workspace;
 128         uint32_t workspace_count;
 129
 130         /* A hack to get text extents for tooltips */
 131         cairo_surface_t *dummy_surface;
 132         void *dummy_surface_data;
 133
 134         int has_rgb565;
 135         int seat_version;
 136 };
 137
 138 struct window_output {
 139         struct output *output;
 140         struct wl_list link;
 141 };
 142
 143 struct toysurface {
 144         /*
 145          * Prepare the surface for drawing. Makes sure there is a surface
 146          * of the right size available for rendering, and returns it.
 147          * dx,dy are the x,y of wl_surface.attach.
 148          * width,height are the new buffer size.
 149          * If flags has SURFACE_HINT_RESIZE set, the user is
 150          * doing continuous resizing.
 151          * Returns the Cairo surface to draw to.
 152          */
 153         cairo_surface_t *(*prepare)(struct toysurface *base, int dx, int dy,
 154                                     int32_t width, int32_t height, uint32_t flags,
 155                                     enum wl_output_transform buffer_transform, int32_t buffer_scale);
 156
 157         /*
 158          * Post the surface to the server, returning the server allocation
 159          * rectangle. The Cairo surface from prepare() must be destroyed
 160          * after calling this.
 161          */
 162         void (*swap)(struct toysurface *base,
 163                      enum wl_output_transform buffer_transform, int32_t buffer_scale,
 164                      struct rectangle *server_allocation);
 165
 166         /*
 167          * Make the toysurface current with the given EGL context.
 168          * Returns 0 on success, and negative of failure.
 169          */
 170         int (*acquire)(struct toysurface *base, EGLContext ctx);
 171
 172         /*
 173          * Release the toysurface from the EGL context, returning control
 174          * to Cairo.
 175          */
 176         void (*release)(struct toysurface *base);
 177
 178         /*
 179          * Destroy the toysurface, including the Cairo surface, any
 180          * backing storage, and the Wayland protocol objects.
 181          */
 182         void (*destroy)(struct toysurface *base);
 183 };
 184
 185 struct surface {
 186         struct window *window;
 187
 188         struct wl_surface *surface;
 189         struct wl_subsurface *subsurface;
 190         int synchronized;
 191         int synchronized_default;
 192         struct toysurface *toysurface;
 193         struct widget *widget;
 194         int redraw_needed;
 195         struct wl_callback *frame_cb;
 196         uint32_t last_time;
 197
 198         struct rectangle allocation;
 199         struct rectangle server_allocation;
 200
 201         struct wl_region *input_region;
 202         struct wl_region *opaque_region;
 203
 204         enum window_buffer_type buffer_type;
 205         enum wl_output_transform buffer_transform;
 206         int32_t buffer_scale;
 207
 208         cairo_surface_t *cairo_surface;
 209
 210         struct wl_list link;
 211 };
 212
 213 struct window {
 214         struct display *display;
 215         struct wl_list window_output_list;
 216         char *title;
 217         struct rectangle saved_allocation;
 218         struct rectangle min_allocation;
 219         struct rectangle pending_allocation;
 220         int x, y;
 221         int redraw_needed;
 222         int redraw_task_scheduled;
 223         struct task redraw_task;
 224         int resize_needed;
 225         int custom;
 226         int focused;
 227
 228         int resizing;
 229
 230         int fullscreen;
 231         int maximized;
 232
 233         enum preferred_format preferred_format;
 234
 235         window_key_handler_t key_handler;
 236         window_keyboard_focus_handler_t keyboard_focus_handler;
 237         window_data_handler_t data_handler;
 238         window_drop_handler_t drop_handler;
 239         window_close_handler_t close_handler;
 240         window_fullscreen_handler_t fullscreen_handler;
 241         window_output_handler_t output_handler;
 242         window_state_changed_handler_t state_changed_handler;
 243
 244         struct surface *main_surface;
 245         struct xdg_surface *xdg_surface;
 246         struct xdg_popup *xdg_popup;
 247
 248         struct window *parent;
 249
 250         struct window_frame *frame;
 251
 252         /* struct surface::link, contains also main_surface */
 253         struct wl_list subsurface_list;
 254
 255         void *user_data;
 256         struct wl_list link;
 257 };
 258
 259 struct widget {
 260         struct window *window;
 261         struct surface *surface;
 262         struct tooltip *tooltip;
 263         struct wl_list child_list;
 264         struct wl_list link;
 265         struct rectangle allocation;
 266         widget_resize_handler_t resize_handler;
 267         widget_redraw_handler_t redraw_handler;
 268         widget_enter_handler_t enter_handler;
 269         widget_leave_handler_t leave_handler;
 270         widget_motion_handler_t motion_handler;
 271         widget_button_handler_t button_handler;
 272         widget_touch_down_handler_t touch_down_handler;
 273         widget_touch_up_handler_t touch_up_handler;
 274         widget_touch_motion_handler_t touch_motion_handler;
 275         widget_touch_frame_handler_t touch_frame_handler;
 276         widget_touch_cancel_handler_t touch_cancel_handler;
 277         widget_axis_handler_t axis_handler;
 278         void *user_data;
 279         int opaque;
 280         int tooltip_count;
 281         int default_cursor;
 282         /* If this is set to false then no cairo surface will be
 283          * created before redrawing the surface. This is useful if the
 284          * redraw handler is going to do completely custom rendering
 285          * such as using EGL directly */
 286         int use_cairo;
 287 };
 288
 289 struct touch_point {
 290         int32_t id;
 291         float x, y;
 292         struct widget *widget;
 293         struct wl_list link;
 294 };
 295
 296 struct input {
 297         struct display *display;
 298         struct wl_seat *seat;
 299         struct wl_pointer *pointer;
 300         struct wl_keyboard *keyboard;
 301         struct wl_touch *touch;
 302         struct wl_list touch_point_list;
 303         struct window *pointer_focus;
 304         struct window *keyboard_focus;
 305         struct window *touch_focus;
 306         int current_cursor;
 307         uint32_t cursor_anim_start;
 308         struct wl_callback *cursor_frame_cb;
 309         struct wl_surface *pointer_surface;
 310         uint32_t modifiers;
 311         uint32_t pointer_enter_serial;
 312         uint32_t cursor_serial;
 313         float sx, sy;
 314         struct wl_list link;
 315
 316         struct widget *focus_widget;
 317         struct widget *grab;
 318         uint32_t grab_button;
 319
 320         struct wl_data_device *data_device;
 321         struct data_offer *drag_offer;
 322         struct data_offer *selection_offer;
 323         uint32_t touch_grab;
 324         int32_t touch_grab_id;
 325         float drag_x, drag_y;
 326         struct window *drag_focus;
 327         uint32_t drag_enter_serial;
 328
 329         struct {
 330                 struct xkb_keymap *keymap;
 331                 struct xkb_state *state;
 332                 xkb_mod_mask_t control_mask;
 333                 xkb_mod_mask_t alt_mask;
 334                 xkb_mod_mask_t shift_mask;
 335         } xkb;
 336
 337         struct task repeat_task;
 338         int repeat_timer_fd;
 339         uint32_t repeat_sym;
 340         uint32_t repeat_key;
 341         uint32_t repeat_time;
 342 };
 343
 344 struct output {
 345         struct display *display;
 346         struct wl_output *output;
 347         uint32_t server_output_id;
 348         struct rectangle allocation;
 349         struct wl_list link;
 350         int transform;
 351         int scale;
 352         char *make;
 353         char *model;
 354
 355         display_output_handler_t destroy_handler;
 356         void *user_data;
 357 };
 358
 359 struct window_frame {
 360         struct widget *widget;
 361         struct widget *child;
 362         struct frame *frame;
 363 };
 364
 365 struct menu {
 366         void *user_data;
 367         struct window *window;
 368         struct widget *widget;
 369         struct input *input;
 370         struct frame *frame;
 371         const char **entries;
 372         uint32_t time;
 373         int current;
 374         int count;
 375         int release_count;
 376         menu_func_t func;
 377 };
 378
 379 struct tooltip {
 380         struct widget *parent;
 381         struct widget *widget;
 382         char *entry;
 383         struct task tooltip_task;
 384         int tooltip_fd;
 385         float x, y;
 386 };
 387
 388 struct shm_pool {
 389         struct wl_shm_pool *pool;
 390         size_t size;
 391         size_t used;
 392         void *data;
 393 };
 394
 395 enum {
 396         CURSOR_DEFAULT = 100,
 397         CURSOR_UNSET
 398 };
 399
 400 static const cairo_user_data_key_t shm_surface_data_key;
 401
 402 /* #define DEBUG */
 403
 404 #ifdef DEBUG
 405
 406 static void
 407 debug_print(void *proxy, int line, const char *func, const char *fmt, ...)
 408 __attribute__ ((format (printf, 4, 5)));
 409
 410 static void
 411 debug_print(void *proxy, int line, const char *func, const char *fmt, ...)
 412 {
 413         va_list ap;
 414         struct timeval tv;
 415
 416         gettimeofday(&tv, NULL);
 417         fprintf(stderr, "%8ld.%03ld ",
 418                 (long)tv.tv_sec & 0xffff, (long)tv.tv_usec / 1000);
 419
 420         if (proxy)
 421                 fprintf(stderr, "%s@%d ",
 422                         wl_proxy_get_class(proxy), wl_proxy_get_id(proxy));
 423
 424         /*fprintf(stderr, __FILE__ ":%d:%s ", line, func);*/
 425         fprintf(stderr, "%s ", func);
 426
 427         va_start(ap, fmt);
 428         vfprintf(stderr, fmt, ap);
 429         va_end(ap);
 430 }
 431
 432 #define DBG(fmt, ...) \
 433         debug_print(NULL, __LINE__, __func__, fmt, ##__VA_ARGS__)
 434
 435 #define DBG_OBJ(obj, fmt, ...) \
 436         debug_print(obj, __LINE__, __func__, fmt, ##__VA_ARGS__)
 437
 438 #else
 439
 440 #define DBG(...) do {} while (0)
 441 #define DBG_OBJ(...) do {} while (0)
 442
 443 #endif
 444
 445 static void
 446 surface_to_buffer_size (enum wl_output_transform buffer_transform, int32_t buffer_scale, int32_t *width, int32_t *height)
 447 {
 448         int32_t tmp;
 449
 450         switch (buffer_transform) {
 451         case WL_OUTPUT_TRANSFORM_90:
 452         case WL_OUTPUT_TRANSFORM_270:
 453         case WL_OUTPUT_TRANSFORM_FLIPPED_90:
 454         case WL_OUTPUT_TRANSFORM_FLIPPED_270:
 455                 tmp = *width;
 456                 *width = *height;
 457                 *height = tmp;
 458                 break;
 459         default:
 460                 break;
 461         }
 462
 463         *width *= buffer_scale;
 464         *height *= buffer_scale;
 465 }
 466
 467 static void
 468 buffer_to_surface_size (enum wl_output_transform buffer_transform, int32_t buffer_scale, int32_t *width, int32_t *height)
 469 {
 470         int32_t tmp;
 471
 472         switch (buffer_transform) {
 473         case WL_OUTPUT_TRANSFORM_90:
 474         case WL_OUTPUT_TRANSFORM_270:
 475         case WL_OUTPUT_TRANSFORM_FLIPPED_90:
 476         case WL_OUTPUT_TRANSFORM_FLIPPED_270:
 477                 tmp = *width;
 478                 *width = *height;
 479                 *height = tmp;
 480                 break;
 481         default:
 482                 break;
 483         }
 484
 485         *width /= buffer_scale;
 486         *height /= buffer_scale;
 487 }
 488
 489 #ifdef HAVE_CAIRO_EGL
 490
 491 struct egl_window_surface {
 492         struct toysurface base;
 493         cairo_surface_t *cairo_surface;
 494         struct display *display;
 495         struct wl_surface *surface;
 496         struct wl_egl_window *egl_window;
 497         EGLSurface egl_surface;
 498 };
 499
 500 static struct egl_window_surface *
 501 to_egl_window_surface(struct toysurface *base)
 502 {
 503         return container_of(base, struct egl_window_surface, base);
 504 }
 505
 506 static cairo_surface_t *
 507 egl_window_surface_prepare(struct toysurface *base, int dx, int dy,
 508                            int32_t width, int32_t height, uint32_t flags,
 509                            enum wl_output_transform buffer_transform, int32_t buffer_scale)
 510 {
 511         struct egl_window_surface *surface = to_egl_window_surface(base);
 512
 513         surface_to_buffer_size (buffer_transform, buffer_scale, &width, &height);
 514
 515         wl_egl_window_resize(surface->egl_window, width, height, dx, dy);
 516         cairo_gl_surface_set_size(surface->cairo_surface, width, height);
 517
 518         return cairo_surface_reference(surface->cairo_surface);
 519 }
 520
 521 static void
 522 egl_window_surface_swap(struct toysurface *base,
 523                         enum wl_output_transform buffer_transform, int32_t buffer_scale,
 524                         struct rectangle *server_allocation)
 525 {
 526         struct egl_window_surface *surface = to_egl_window_surface(base);
 527
 528         cairo_gl_surface_swapbuffers(surface->cairo_surface);
 529         wl_egl_window_get_attached_size(surface->egl_window,
 530                                         &server_allocation->width,
 531                                         &server_allocation->height);
 532
 533         buffer_to_surface_size (buffer_transform, buffer_scale,
 534                                 &server_allocation->width,
 535                                 &server_allocation->height);
 536 }
 537
 538 static int
 539 egl_window_surface_acquire(struct toysurface *base, EGLContext ctx)
 540 {
 541         struct egl_window_surface *surface = to_egl_window_surface(base);
 542         cairo_device_t *device;
 543
 544         device = cairo_surface_get_device(surface->cairo_surface);
 545         if (!device)
 546                 return -1;
 547
 548         if (!ctx) {
 549                 if (device == surface->display->argb_device)
 550                         ctx = surface->display->argb_ctx;
 551                 else
 552                         assert(0);
 553         }
 554
 555         cairo_device_flush(device);
 556         cairo_device_acquire(device);
 557         if (!eglMakeCurrent(surface->display->dpy, surface->egl_surface,
 558                             surface->egl_surface, ctx))
 559                 fprintf(stderr, "failed to make surface current\n");
 560
 561         return 0;
 562 }
 563
 564 static void
 565 egl_window_surface_release(struct toysurface *base)
 566 {
 567         struct egl_window_surface *surface = to_egl_window_surface(base);
 568         cairo_device_t *device;
 569
 570         device = cairo_surface_get_device(surface->cairo_surface);
 571         if (!device)
 572                 return;
 573
 574         if (!eglMakeCurrent(surface->display->dpy, NULL, NULL,
 575                             surface->display->argb_ctx))
 576                 fprintf(stderr, "failed to make context current\n");
 577
 578         cairo_device_release(device);
 579 }
 580
 581 static void
 582 egl_window_surface_destroy(struct toysurface *base)
 583 {
 584         struct egl_window_surface *surface = to_egl_window_surface(base);
 585         struct display *d = surface->display;
 586
 587         cairo_surface_destroy(surface->cairo_surface);
 588         eglDestroySurface(d->dpy, surface->egl_surface);
 589         wl_egl_window_destroy(surface->egl_window);
 590         surface->surface = NULL;
 591
 592         free(surface);
 593 }
 594
 595 static struct toysurface *
 596 egl_window_surface_create(struct display *display,
 597                           struct wl_surface *wl_surface,
 598                           uint32_t flags,
 599                           struct rectangle *rectangle)
 600 {
 601         struct egl_window_surface *surface;
 602
 603         if (display->dpy == EGL_NO_DISPLAY)
 604                 return NULL;
 605
 606         surface = calloc(1, sizeof *surface);
 607         if (!surface)
 608                 return NULL;
 609
 610         surface->base.prepare = egl_window_surface_prepare;
 611         surface->base.swap = egl_window_surface_swap;
 612         surface->base.acquire = egl_window_surface_acquire;
 613         surface->base.release = egl_window_surface_release;
 614         surface->base.destroy = egl_window_surface_destroy;
 615
 616         surface->display = display;
 617         surface->surface = wl_surface;
 618
 619         surface->egl_window = wl_egl_window_create(surface->surface,
 620                                                    rectangle->width,
 621                                                    rectangle->height);
 622
 623         surface->egl_surface = eglCreateWindowSurface(display->dpy,
 624                                                       display->argb_config,
 625                                                       surface->egl_window,
 626                                                       NULL);
 627
 628         surface->cairo_surface =
 629                 cairo_gl_surface_create_for_egl(display->argb_device,
 630                                                 surface->egl_surface,
 631                                                 rectangle->width,
 632                                                 rectangle->height);
 633
 634         return &surface->base;
 635 }
 636
 637 #else
 638
 639 static struct toysurface *
 640 egl_window_surface_create(struct display *display,
 641                           struct wl_surface *wl_surface,
 642                           uint32_t flags,
 643                           struct rectangle *rectangle)
 644 {
 645         return NULL;
 646 }
 647
 648 #endif
 649
 650 struct shm_surface_data {
 651         struct wl_buffer *buffer;
 652         struct shm_pool *pool;
 653 };
 654
 655 struct wl_buffer *
 656 display_get_buffer_for_surface(struct display *display,
 657                                cairo_surface_t *surface)
 658 {
 659         struct shm_surface_data *data;
 660
 661         data = cairo_surface_get_user_data(surface, &shm_surface_data_key);
 662
 663         return data->buffer;
 664 }
 665
 666 static void
 667 shm_pool_destroy(struct shm_pool *pool);
 668
 669 static void
 670 shm_surface_data_destroy(void *p)
 671 {
 672         struct shm_surface_data *data = p;
 673
 674         wl_buffer_destroy(data->buffer);
 675         if (data->pool)
 676                 shm_pool_destroy(data->pool);
 677
 678         free(data);
 679 }
 680
 681 static struct wl_shm_pool *
 682 make_shm_pool(struct display *display, int size, void **data)
 683 {
 684         struct wl_shm_pool *pool;
 685         int fd;
 686
 687         fd = os_create_anonymous_file(size);
 688         if (fd < 0) {
 689                 fprintf(stderr, "creating a buffer file for %d B failed: %m\n",
 690                         size);
 691                 return NULL;
 692         }
 693
 694         *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 695         if (*data == MAP_FAILED) {
 696                 fprintf(stderr, "mmap failed: %m\n");
 697                 close(fd);
 698                 return NULL;
 699         }
 700
 701         pool = wl_shm_create_pool(display->shm, fd, size);
 702
 703         close(fd);
 704
 705         return pool;
 706 }
 707
 708 static struct shm_pool *
 709 shm_pool_create(struct display *display, size_t size)
 710 {
 711         struct shm_pool *pool = malloc(sizeof *pool);
 712
 713         if (!pool)
 714                 return NULL;
 715
 716         pool->pool = make_shm_pool(display, size, &pool->data);
 717         if (!pool->pool) {
 718                 free(pool);
 719                 return NULL;
 720         }
 721
 722         pool->size = size;
 723         pool->used = 0;
 724
 725         return pool;
 726 }
 727
 728 static void *
 729 shm_pool_allocate(struct shm_pool *pool, size_t size, int *offset)
 730 {
 731         if (pool->used + size > pool->size)
 732                 return NULL;
 733
 734         *offset = pool->used;
 735         pool->used += size;
 736
 737         return (char *) pool->data + *offset;
 738 }
 739
 740 /* destroy the pool. this does not unmap the memory though */
 741 static void
 742 shm_pool_destroy(struct shm_pool *pool)
 743 {
 744         munmap(pool->data, pool->size);
 745         wl_shm_pool_destroy(pool->pool);
 746         free(pool);
 747 }
 748
 749 /* Start allocating from the beginning of the pool again */
 750 static void
 751 shm_pool_reset(struct shm_pool *pool)
 752 {
 753         pool->used = 0;
 754 }
 755
 756 static int
 757 data_length_for_shm_surface(struct rectangle *rect)
 758 {
 759         int stride;
 760
 761         stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32,
 762                                                 rect->width);
 763         return stride * rect->height;
 764 }
 765
 766 static cairo_surface_t *
 767 display_create_shm_surface_from_pool(struct display *display,
 768                                      struct rectangle *rectangle,
 769                                      uint32_t flags, struct shm_pool *pool)
 770 {
 771         struct shm_surface_data *data;
 772         uint32_t format;
 773         cairo_surface_t *surface;
 774         cairo_format_t cairo_format;
 775         int stride, length, offset;
 776         void *map;
 777
 778         data = malloc(sizeof *data);
 779         if (data == NULL)
 780                 return NULL;
 781
 782         if (flags & SURFACE_HINT_RGB565 && display->has_rgb565)
 783                 cairo_format = CAIRO_FORMAT_RGB16_565;
 784         else
 785                 cairo_format = CAIRO_FORMAT_ARGB32;
 786
 787         stride = cairo_format_stride_for_width (cairo_format, rectangle->width);
 788         length = stride * rectangle->height;
 789         data->pool = NULL;
 790         map = shm_pool_allocate(pool, length, &offset);
 791
 792         if (!map) {
 793                 free(data);
 794                 return NULL;
 795         }
 796
 797         surface = cairo_image_surface_create_for_data (map,
 798                                                        cairo_format,
 799                                                        rectangle->width,
 800                                                        rectangle->height,
 801                                                        stride);
 802
 803         cairo_surface_set_user_data(surface, &shm_surface_data_key,
 804                                     data, shm_surface_data_destroy);
 805
 806         if (flags & SURFACE_HINT_RGB565 && display->has_rgb565)
 807                 format = WL_SHM_FORMAT_RGB565;
 808         else {
 809                 if (flags & SURFACE_OPAQUE)
 810                         format = WL_SHM_FORMAT_XRGB8888;
 811                 else
 812                         format = WL_SHM_FORMAT_ARGB8888;
 813         }
 814
 815         data->buffer = wl_shm_pool_create_buffer(pool->pool, offset,
 816                                                  rectangle->width,
 817                                                  rectangle->height,
 818                                                  stride, format);
 819
 820         return surface;
 821 }
 822
 823 static cairo_surface_t *
 824 display_create_shm_surface(struct display *display,
 825                            struct rectangle *rectangle, uint32_t flags,
 826                            struct shm_pool *alternate_pool,
 827                            struct shm_surface_data **data_ret)
 828 {
 829         struct shm_surface_data *data;
 830         struct shm_pool *pool;
 831         cairo_surface_t *surface;
 832
 833         if (alternate_pool) {
 834                 shm_pool_reset(alternate_pool);
 835                 surface = display_create_shm_surface_from_pool(display,
 836                                                                rectangle,
 837                                                                flags,
 838                                                                alternate_pool);
 839                 if (surface) {
 840                         data = cairo_surface_get_user_data(surface,
 841                                                            &shm_surface_data_key);
 842                         goto out;
 843                 }
 844         }
 845
 846         pool = shm_pool_create(display,
 847                                data_length_for_shm_surface(rectangle));
 848         if (!pool)
 849                 return NULL;
 850
 851         surface =
 852                 display_create_shm_surface_from_pool(display, rectangle,
 853                                                      flags, pool);
 854
 855         if (!surface) {
 856                 shm_pool_destroy(pool);
 857                 return NULL;
 858         }
 859
 860         /* make sure we destroy the pool when the surface is destroyed */
 861         data = cairo_surface_get_user_data(surface, &shm_surface_data_key);
 862         data->pool = pool;
 863
 864 out:
 865         if (data_ret)
 866                 *data_ret = data;
 867
 868         return surface;
 869 }
 870
 871 static int
 872 check_size(struct rectangle *rect)
 873 {
 874         if (rect->width && rect->height)
 875                 return 0;
 876
 877         fprintf(stderr, "tried to create surface of "
 878                 "width: %d, height: %d\n", rect->width, rect->height);
 879         return -1;
 880 }
 881
 882 cairo_surface_t *
 883 display_create_surface(struct display *display,
 884                        struct wl_surface *surface,
 885                        struct rectangle *rectangle,
 886                        uint32_t flags)
 887 {
 888         if (check_size(rectangle) < 0)
 889                 return NULL;
 890
 891         assert(flags & SURFACE_SHM);
 892         return display_create_shm_surface(display, rectangle, flags,
 893                                           NULL, NULL);
 894 }
 895
 896 struct shm_surface_leaf {
 897         cairo_surface_t *cairo_surface;
 898         /* 'data' is automatically destroyed, when 'cairo_surface' is */
 899         struct shm_surface_data *data;
 900
 901         struct shm_pool *resize_pool;
 902         int busy;
 903 };
 904
 905 static void
 906 shm_surface_leaf_release(struct shm_surface_leaf *leaf)
 907 {
 908         if (leaf->cairo_surface)
 909                 cairo_surface_destroy(leaf->cairo_surface);
 910         /* leaf->data already destroyed via cairo private */
 911
 912         if (leaf->resize_pool)
 913                 shm_pool_destroy(leaf->resize_pool);
 914
 915         memset(leaf, 0, sizeof *leaf);
 916 }
 917
 918 #define MAX_LEAVES 3
 919
 920 struct shm_surface {
 921         struct toysurface base;
 922         struct display *display;
 923         struct wl_surface *surface;
 924         uint32_t flags;
 925         int dx, dy;
 926
 927         struct shm_surface_leaf leaf[MAX_LEAVES];
 928         struct shm_surface_leaf *current;
 929 };
 930
 931 static struct shm_surface *
 932 to_shm_surface(struct toysurface *base)
 933 {
 934         return container_of(base, struct shm_surface, base);
 935 }
 936
 937 static void
 938 shm_surface_buffer_state_debug(struct shm_surface *surface, const char *msg)
 939 {
 940 #ifdef DEBUG
 941         struct shm_surface_leaf *leaf;
 942         char bufs[MAX_LEAVES + 1];
 943         int i;
 944
 945         for (i = 0; i < MAX_LEAVES; i++) {
 946                 leaf = &surface->leaf[i];
 947
 948                 if (leaf->busy)
 949                         bufs[i] = 'b';
 950                 else if (leaf->cairo_surface)
 951                         bufs[i] = 'a';
 952                 else
 953                         bufs[i] = ' ';
 954         }
 955
 956         bufs[MAX_LEAVES] = '\0';
 957         DBG_OBJ(surface->surface, "%s, leaves [%s]\n", msg, bufs);
 958 #endif
 959 }
 960
 961 static void
 962 shm_surface_buffer_release(void *data, struct wl_buffer *buffer)
 963 {
 964         struct shm_surface *surface = data;
 965         struct shm_surface_leaf *leaf;
 966         int i;
 967         int free_found;
 968
 969         shm_surface_buffer_state_debug(surface, "buffer_release before");
 970
 971         for (i = 0; i < MAX_LEAVES; i++) {
 972                 leaf = &surface->leaf[i];
 973                 if (leaf->data && leaf->data->buffer == buffer) {
 974                         leaf->busy = 0;
 975                         break;
 976                 }
 977         }
 978         assert(i < MAX_LEAVES && "unknown buffer released");
 979
 980         /* Leave one free leaf with storage, release others */
 981         free_found = 0;
 982         for (i = 0; i < MAX_LEAVES; i++) {
 983                 leaf = &surface->leaf[i];
 984
 985                 if (!leaf->cairo_surface || leaf->busy)
 986                         continue;
 987
 988                 if (!free_found)
 989                         free_found = 1;
 990                 else
 991                         shm_surface_leaf_release(leaf);
 992         }
 993
 994         shm_surface_buffer_state_debug(surface, "buffer_release  after");
 995 }
 996
 997 static const struct wl_buffer_listener shm_surface_buffer_listener = {
 998         shm_surface_buffer_release
 999 };
1000
1001 static cairo_surface_t *
1002 shm_surface_prepare(struct toysurface *base, int dx, int dy,
1003                     int32_t width, int32_t height, uint32_t flags,
1004                     enum wl_output_transform buffer_transform, int32_t buffer_scale)
1005 {
1006         int resize_hint = !!(flags & SURFACE_HINT_RESIZE);
1007         struct shm_surface *surface = to_shm_surface(base);
1008         struct rectangle rect = { 0};
1009         struct shm_surface_leaf *leaf = NULL;
1010         int i;
1011
1012         surface->dx = dx;
1013         surface->dy = dy;
1014
1015         /* pick a free buffer, preferrably one that already has storage */
1016         for (i = 0; i < MAX_LEAVES; i++) {
1017                 if (surface->leaf[i].busy)
1018                         continue;
1019
1020                 if (!leaf || surface->leaf[i].cairo_surface)
1021                         leaf = &surface->leaf[i];
1022         }
1023         DBG_OBJ(surface->surface, "pick leaf %d\n",
1024                 (int)(leaf - &surface->leaf[0]));
1025
1026         if (!leaf) {
1027                 fprintf(stderr, "%s: all buffers are held by the server.\n",
1028                         __func__);
1029                 exit(1);
1030                 return NULL;
1031         }
1032
1033         if (!resize_hint && leaf->resize_pool) {
1034                 cairo_surface_destroy(leaf->cairo_surface);
1035                 leaf->cairo_surface = NULL;
1036                 shm_pool_destroy(leaf->resize_pool);
1037                 leaf->resize_pool = NULL;
1038         }
1039
1040         surface_to_buffer_size (buffer_transform, buffer_scale, &width, &height);
1041
1042         if (leaf->cairo_surface &&
1043             cairo_image_surface_get_width(leaf->cairo_surface) == width &&
1044             cairo_image_surface_get_height(leaf->cairo_surface) == height)
1045                 goto out;
1046
1047         if (leaf->cairo_surface)
1048                 cairo_surface_destroy(leaf->cairo_surface);
1049
1050 #ifdef USE_RESIZE_POOL
1051         if (resize_hint && !leaf->resize_pool) {
1052                 /* Create a big pool to allocate from, while continuously
1053                  * resizing. Mmapping a new pool in the server
1054                  * is relatively expensive, so reusing a pool performs
1055                  * better, but may temporarily reserve unneeded memory.
1056                  */
1057                 /* We should probably base this number on the output size. */
1058                 leaf->resize_pool = shm_pool_create(surface->display,
1059                                                     6 * 1024 * 1024);
1060         }
1061 #endif
1062
1063         rect.width = width;
1064         rect.height = height;
1065
1066         leaf->cairo_surface =
1067                 display_create_shm_surface(surface->display, &rect,
1068                                            surface->flags,
1069                                            leaf->resize_pool,
1070                                            &leaf->data);
1071         if (!leaf->cairo_surface)
1072                 return NULL;
1073
1074         wl_buffer_add_listener(leaf->data->buffer,
1075                                &shm_surface_buffer_listener, surface);
1076
1077 out:
1078         surface->current = leaf;
1079
1080         return cairo_surface_reference(leaf->cairo_surface);
1081 }
1082
1083 static void
1084 shm_surface_swap(struct toysurface *base,
1085                  enum wl_output_transform buffer_transform, int32_t buffer_scale,
1086                  struct rectangle *server_allocation)
1087 {
1088         struct shm_surface *surface = to_shm_surface(base);
1089         struct shm_surface_leaf *leaf = surface->current;
1090
1091         server_allocation->width =
1092                 cairo_image_surface_get_width(leaf->cairo_surface);
1093         server_allocation->height =
1094                 cairo_image_surface_get_height(leaf->cairo_surface);
1095
1096         buffer_to_surface_size (buffer_transform, buffer_scale,
1097                                 &server_allocation->width,
1098                                 &server_allocation->height);
1099
1100         wl_surface_attach(surface->surface, leaf->data->buffer,
1101                           surface->dx, surface->dy);
1102         wl_surface_damage(surface->surface, 0, 0,
1103                           server_allocation->width, server_allocation->height);
1104         wl_surface_commit(surface->surface);
1105
1106         DBG_OBJ(surface->surface, "leaf %d busy\n",
1107                 (int)(leaf - &surface->leaf[0]));
1108
1109         leaf->busy = 1;
1110         surface->current = NULL;
1111 }
1112
1113 static int
1114 shm_surface_acquire(struct toysurface *base, EGLContext ctx)
1115 {
1116         return -1;
1117 }
1118
1119 static void
1120 shm_surface_release(struct toysurface *base)
1121 {
1122 }
1123
1124 static void
1125 shm_surface_destroy(struct toysurface *base)
1126 {
1127         struct shm_surface *surface = to_shm_surface(base);
1128         int i;
1129
1130         for (i = 0; i < MAX_LEAVES; i++)
1131                 shm_surface_leaf_release(&surface->leaf[i]);
1132
1133         free(surface);
1134 }
1135
1136 static struct toysurface *
1137 shm_surface_create(struct display *display, struct wl_surface *wl_surface,
1138                    uint32_t flags, struct rectangle *rectangle)
1139 {
1140         struct shm_surface *surface;
1141         DBG_OBJ(wl_surface, "\n");
1142
1143         surface = xmalloc(sizeof *surface);
1144         memset(surface, 0, sizeof *surface);
1145
1146         if (!surface)
1147                 return NULL;
1148
1149         surface->base.prepare = shm_surface_prepare;
1150         surface->base.swap = shm_surface_swap;
1151         surface->base.acquire = shm_surface_acquire;
1152         surface->base.release = shm_surface_release;
1153         surface->base.destroy = shm_surface_destroy;
1154
1155         surface->display = display;
1156         surface->surface = wl_surface;
1157         surface->flags = flags;
1158
1159         return &surface->base;
1160 }
1161
1162 /*
1163  * The following correspondences between file names and cursors was copied
1164  * from: https://bugs.kde.org/attachment.cgi?id=67313
1165  */
1166
1167 static const char *bottom_left_corners[] = {
1168         "bottom_left_corner",
1169         "sw-resize",
1170         "size_bdiag"
1171 };
1172
1173 static const char *bottom_right_corners[] = {
1174         "bottom_right_corner",
1175         "se-resize",
1176         "size_fdiag"
1177 };
1178
1179 static const char *bottom_sides[] = {
1180         "bottom_side",
1181         "s-resize",
1182         "size_ver"
1183 };
1184
1185 static const char *grabbings[] = {
1186         "grabbing",
1187         "closedhand",
1188         "208530c400c041818281048008011002"
1189 };
1190
1191 static const char *left_ptrs[] = {
1192         "left_ptr",
1193         "default",
1194         "top_left_arrow",
1195         "left-arrow"
1196 };
1197
1198 static const char *left_sides[] = {
1199         "left_side",
1200         "w-resize",
1201         "size_hor"
1202 };
1203
1204 static const char *right_sides[] = {
1205         "right_side",
1206         "e-resize",
1207         "size_hor"
1208 };
1209
1210 static const char *top_left_corners[] = {
1211         "top_left_corner",
1212         "nw-resize",
1213         "size_fdiag"
1214 };
1215
1216 static const char *top_right_corners[] = {
1217         "top_right_corner",
1218         "ne-resize",
1219         "size_bdiag"
1220 };
1221
1222 static const char *top_sides[] = {
1223         "top_side",
1224         "n-resize",
1225         "size_ver"
1226 };
1227
1228 static const char *xterms[] = {
1229         "xterm",
1230         "ibeam",
1231         "text"
1232 };
1233
1234 static const char *hand1s[] = {
1235         "hand1",
1236         "pointer",
1237         "pointing_hand",
1238         "e29285e634086352946a0e7090d73106"
1239 };
1240
1241 static const char *watches[] = {
1242         "watch",
1243         "wait",
1244         "0426c94ea35c87780ff01dc239897213"
1245 };
1246
1247 struct cursor_alternatives {
1248         const char **names;
1249         size_t count;
1250 };
1251
1252 static const struct cursor_alternatives cursors[] = {
1253         {bottom_left_corners, ARRAY_LENGTH(bottom_left_corners)},
1254         {bottom_right_corners, ARRAY_LENGTH(bottom_right_corners)},
1255         {bottom_sides, ARRAY_LENGTH(bottom_sides)},
1256         {grabbings, ARRAY_LENGTH(grabbings)},
1257         {left_ptrs, ARRAY_LENGTH(left_ptrs)},
1258         {left_sides, ARRAY_LENGTH(left_sides)},
1259         {right_sides, ARRAY_LENGTH(right_sides)},
1260         {top_left_corners, ARRAY_LENGTH(top_left_corners)},
1261         {top_right_corners, ARRAY_LENGTH(top_right_corners)},
1262         {top_sides, ARRAY_LENGTH(top_sides)},
1263         {xterms, ARRAY_LENGTH(xterms)},
1264         {hand1s, ARRAY_LENGTH(hand1s)},
1265         {watches, ARRAY_LENGTH(watches)},
1266 };
1267
1268 static void
1269 create_cursors(struct display *display)
1270 {
1271         struct weston_config *config;
1272         struct weston_config_section *s;
1273         int size;
1274         char *theme = NULL;
1275         unsigned int i, j;
1276         struct wl_cursor *cursor;
1277
1278         config = weston_config_parse("weston.ini");
1279         s = weston_config_get_section(config, "shell", NULL, NULL);
1280         weston_config_section_get_string(s, "cursor-theme", &theme, NULL);
1281         weston_config_section_get_int(s, "cursor-size", &size, 32);
1282         weston_config_destroy(config);
1283
1284         display->cursor_theme = wl_cursor_theme_load(theme, size, display->shm);
1285         if (!display->cursor_theme) {
1286                 fprintf(stderr, "could not load theme '%s'\n", theme);
1287                 return;
1288         }
1289         free(theme);
1290         display->cursors =
1291                 xmalloc(ARRAY_LENGTH(cursors) * sizeof display->cursors[0]);
1292
1293         for (i = 0; i < ARRAY_LENGTH(cursors); i++) {
1294                 cursor = NULL;
1295                 for (j = 0; !cursor && j < cursors[i].count; ++j)
1296                         cursor = wl_cursor_theme_get_cursor(
1297                             display->cursor_theme, cursors[i].names[j]);
1298
1299                 if (!cursor)
1300                         fprintf(stderr, "could not load cursor '%s'\n",
1301                                 cursors[i].names[0]);
1302
1303                 display->cursors[i] = cursor;
1304         }
1305 }
1306
1307 static void
1308 destroy_cursors(struct display *display)
1309 {
1310         wl_cursor_theme_destroy(display->cursor_theme);
1311         free(display->cursors);
1312 }
1313
1314 struct wl_cursor_image *
1315 display_get_pointer_image(struct display *display, int pointer)
1316 {
1317         struct wl_cursor *cursor = display->cursors[pointer];
1318
1319         return cursor ? cursor->images[0] : NULL;
1320 }
1321
1322 static void
1323 surface_flush(struct surface *surface)
1324 {
1325         if (!surface->cairo_surface)
1326                 return;
1327
1328         if (surface->opaque_region) {
1329                 wl_surface_set_opaque_region(surface->surface,
1330                                              surface->opaque_region);
1331                 wl_region_destroy(surface->opaque_region);
1332                 surface->opaque_region = NULL;
1333         }
1334
1335         if (surface->input_region) {
1336                 wl_surface_set_input_region(surface->surface,
1337                                             surface->input_region);
1338                 wl_region_destroy(surface->input_region);
1339                 surface->input_region = NULL;
1340         }
1341
1342         surface->toysurface->swap(surface->toysurface,
1343                                   surface->buffer_transform, surface->buffer_scale,
1344                                   &surface->server_allocation);
1345
1346         cairo_surface_destroy(surface->cairo_surface);
1347         surface->cairo_surface = NULL;
1348 }
1349
1350 int
1351 window_has_focus(struct window *window)
1352 {
1353         return window->focused;
1354 }
1355
1356 static void
1357 window_close(struct window *window)
1358 {
1359         if (window->close_handler)
1360                 window->close_handler(window->user_data);
1361         else
1362                 display_exit(window->display);
1363 }
1364
1365 struct display *
1366 window_get_display(struct window *window)
1367 {
1368         return window->display;
1369 }
1370
1371 static void
1372 surface_create_surface(struct surface *surface, uint32_t flags)
1373 {
1374         struct display *display = surface->window->display;
1375         struct rectangle allocation = surface->allocation;
1376
1377         if (!surface->toysurface && display->dpy &&
1378             surface->buffer_type == WINDOW_BUFFER_TYPE_EGL_WINDOW) {
1379                 surface->toysurface =
1380                         egl_window_surface_create(display,
1381                                                   surface->surface,
1382                                                   flags,
1383                                                   &allocation);
1384         }
1385
1386         if (!surface->toysurface)
1387                 surface->toysurface = shm_surface_create(display,
1388                                                          surface->surface,
1389                                                          flags, &allocation);
1390
1391         surface->cairo_surface = surface->toysurface->prepare(
1392                 surface->toysurface, 0, 0,
1393                 allocation.width, allocation.height, flags,
1394                 surface->buffer_transform, surface->buffer_scale);
1395 }
1396
1397 static void
1398 window_create_main_surface(struct window *window)
1399 {
1400         struct surface *surface = window->main_surface;
1401         uint32_t flags = 0;
1402
1403         if (window->resizing)
1404                 flags |= SURFACE_HINT_RESIZE;
1405
1406         if (window->preferred_format == WINDOW_PREFERRED_FORMAT_RGB565)
1407                 flags |= SURFACE_HINT_RGB565;
1408
1409         surface_create_surface(surface, flags);
1410 }
1411
1412 int
1413 window_get_buffer_transform(struct window *window)
1414 {
1415         return window->main_surface->buffer_transform;
1416 }
1417
1418 void
1419 window_set_buffer_transform(struct window *window,
1420                             enum wl_output_transform transform)
1421 {
1422         window->main_surface->buffer_transform = transform;
1423         wl_surface_set_buffer_transform(window->main_surface->surface,
1424                                         transform);
1425 }
1426
1427 void
1428 window_set_buffer_scale(struct window *window,
1429                         int32_t scale)
1430 {
1431         window->main_surface->buffer_scale = scale;
1432         wl_surface_set_buffer_scale(window->main_surface->surface,
1433                                     scale);
1434 }
1435
1436 uint32_t
1437 window_get_buffer_scale(struct window *window)
1438 {
1439         return window->main_surface->buffer_scale;
1440 }
1441
1442 uint32_t
1443 window_get_output_scale(struct window *window)
1444 {
1445         struct window_output *window_output;
1446         struct window_output *window_output_tmp;
1447         int scale = 1;
1448
1449         wl_list_for_each_safe(window_output, window_output_tmp,
1450                               &window->window_output_list, link) {
1451                 if (window_output->output->scale > scale)
1452                         scale = window_output->output->scale;
1453         }
1454
1455         return scale;
1456 }
1457
1458 static void window_frame_destroy(struct window_frame *frame);
1459
1460 static void
1461 surface_destroy(struct surface *surface)
1462 {
1463         if (surface->frame_cb)
1464                 wl_callback_destroy(surface->frame_cb);
1465
1466         if (surface->input_region)
1467                 wl_region_destroy(surface->input_region);
1468
1469         if (surface->opaque_region)
1470                 wl_region_destroy(surface->opaque_region);
1471
1472         if (surface->subsurface)
1473                 wl_subsurface_destroy(surface->subsurface);
1474
1475         wl_surface_destroy(surface->surface);
1476
1477         if (surface->toysurface)
1478                 surface->toysurface->destroy(surface->toysurface);
1479
1480         wl_list_remove(&surface->link);
1481         free(surface);
1482 }
1483
1484 void
1485 window_destroy(struct window *window)
1486 {
1487         struct display *display = window->display;
1488         struct input *input;
1489         struct window_output *window_output;
1490         struct window_output *window_output_tmp;
1491
1492         wl_list_remove(&window->redraw_task.link);
1493
1494         wl_list_for_each(input, &display->input_list, link) {
1495                 if (input->touch_focus == window)
1496                         input->touch_focus = NULL;
1497                 if (input->pointer_focus == window)
1498                         input->pointer_focus = NULL;
1499                 if (input->keyboard_focus == window)
1500                         input->keyboard_focus = NULL;
1501                 if (input->focus_widget &&
1502                     input->focus_widget->window == window)
1503                         input->focus_widget = NULL;
1504         }
1505
1506         wl_list_for_each_safe(window_output, window_output_tmp,
1507                               &window->window_output_list, link) {
1508                 free (window_output);
1509         }
1510
1511         if (window->frame)
1512                 window_frame_destroy(window->frame);
1513
1514         if (window->xdg_surface)
1515                 xdg_surface_destroy(window->xdg_surface);
1516         if (window->xdg_popup)
1517                 xdg_popup_destroy(window->xdg_popup);
1518
1519         surface_destroy(window->main_surface);
1520
1521         wl_list_remove(&window->link);
1522
1523         free(window->title);
1524         free(window);
1525 }
1526
1527 static struct widget *
1528 widget_find_widget(struct widget *widget, int32_t x, int32_t y)
1529 {
1530         struct widget *child, *target;
1531
1532         wl_list_for_each(child, &widget->child_list, link) {
1533                 target = widget_find_widget(child, x, y);
1534                 if (target)
1535                         return target;
1536         }
1537
1538         if (widget->allocation.x <= x &&
1539             x < widget->allocation.x + widget->allocation.width &&
1540             widget->allocation.y <= y &&
1541             y < widget->allocation.y + widget->allocation.height) {
1542                 return widget;
1543         }
1544
1545         return NULL;
1546 }
1547
1548 static struct widget *
1549 window_find_widget(struct window *window, int32_t x, int32_t y)
1550 {
1551         struct surface *surface;
1552         struct widget *widget;
1553
1554         wl_list_for_each(surface, &window->subsurface_list, link) {
1555                 widget = widget_find_widget(surface->widget, x, y);
1556                 if (widget)
1557                         return widget;
1558         }
1559
1560         return NULL;
1561 }
1562
1563 static struct widget *
1564 widget_create(struct window *window, struct surface *surface, void *data)
1565 {
1566         struct widget *widget;
1567
1568         widget = xzalloc(sizeof *widget);
1569         widget->window = window;
1570         widget->surface = surface;
1571         widget->user_data = data;
1572         widget->allocation = surface->allocation;
1573         wl_list_init(&widget->child_list);
1574         widget->opaque = 0;
1575         widget->tooltip = NULL;
1576         widget->tooltip_count = 0;
1577         widget->default_cursor = CURSOR_LEFT_PTR;
1578         widget->use_cairo = 1;
1579
1580         return widget;
1581 }
1582
1583 struct widget *
1584 window_add_widget(struct window *window, void *data)
1585 {
1586         struct widget *widget;
1587
1588         widget = widget_create(window, window->main_surface, data);
1589         wl_list_init(&widget->link);
1590         window->main_surface->widget = widget;
1591
1592         return widget;
1593 }
1594
1595 struct widget *
1596 widget_add_widget(struct widget *parent, void *data)
1597 {
1598         struct widget *widget;
1599
1600         widget = widget_create(parent->window, parent->surface, data);
1601         wl_list_insert(parent->child_list.prev, &widget->link);
1602
1603         return widget;
1604 }
1605
1606 void
1607 widget_destroy(struct widget *widget)
1608 {
1609         struct display *display = widget->window->display;
1610         struct surface *surface = widget->surface;
1611         struct input *input;
1612
1613         /* Destroy the sub-surface along with the root widget */
1614         if (surface->widget == widget && surface->subsurface)
1615                 surface_destroy(widget->surface);
1616
1617         if (widget->tooltip)
1618                 widget_destroy_tooltip(widget);
1619
1620         wl_list_for_each(input, &display->input_list, link) {
1621                 if (input->focus_widget == widget)
1622                         input->focus_widget = NULL;
1623         }
1624
1625         wl_list_remove(&widget->link);
1626         free(widget);
1627 }
1628
1629 void
1630 widget_set_default_cursor(struct widget *widget, int cursor)
1631 {
1632         widget->default_cursor = cursor;
1633 }
1634
1635 void
1636 widget_get_allocation(struct widget *widget, struct rectangle *allocation)
1637 {
1638         *allocation = widget->allocation;
1639 }
1640
1641 void
1642 widget_set_size(struct widget *widget, int32_t width, int32_t height)
1643 {
1644         widget->allocation.width = width;
1645         widget->allocation.height = height;
1646 }
1647
1648 void
1649 widget_set_allocation(struct widget *widget,
1650                       int32_t x, int32_t y, int32_t width, int32_t height)
1651 {
1652         widget->allocation.x = x;
1653         widget->allocation.y = y;
1654         widget_set_size(widget, width, height);
1655 }
1656
1657 void
1658 widget_set_transparent(struct widget *widget, int transparent)
1659 {
1660         widget->opaque = !transparent;
1661 }
1662
1663 void *
1664 widget_get_user_data(struct widget *widget)
1665 {
1666         return widget->user_data;
1667 }
1668
1669 static cairo_surface_t *
1670 widget_get_cairo_surface(struct widget *widget)
1671 {
1672         struct surface *surface = widget->surface;
1673         struct window *window = widget->window;
1674
1675         assert(widget->use_cairo);
1676
1677         if (!surface->cairo_surface) {
1678                 if (surface == window->main_surface)
1679                         window_create_main_surface(window);
1680                 else
1681                         surface_create_surface(surface, 0);
1682         }
1683
1684         return surface->cairo_surface;
1685 }
1686
1687 static void
1688 widget_cairo_update_transform(struct widget *widget, cairo_t *cr)
1689 {
1690         struct surface *surface = widget->surface;
1691         double angle;
1692         cairo_matrix_t m;
1693         enum wl_output_transform transform;
1694         int surface_width, surface_height;
1695         int translate_x, translate_y;
1696         int32_t scale;
1697
1698         surface_width = surface->allocation.width;
1699         surface_height = surface->allocation.height;
1700
1701         transform = surface->buffer_transform;
1702         scale = surface->buffer_scale;
1703
1704         switch (transform) {
1705         case WL_OUTPUT_TRANSFORM_FLIPPED:
1706         case WL_OUTPUT_TRANSFORM_FLIPPED_90:
1707         case WL_OUTPUT_TRANSFORM_FLIPPED_180:
1708         case WL_OUTPUT_TRANSFORM_FLIPPED_270:
1709                 cairo_matrix_init(&m, -1, 0, 0, 1, 0, 0);
1710                 break;
1711         default:
1712                 cairo_matrix_init_identity(&m);
1713                 break;
1714         }
1715
1716         switch (transform) {
1717         case WL_OUTPUT_TRANSFORM_NORMAL:
1718         default:
1719                 angle = 0;
1720                 translate_x = 0;
1721                 translate_y = 0;
1722                 break;
1723         case WL_OUTPUT_TRANSFORM_FLIPPED:
1724                 angle = 0;
1725                 translate_x = surface_width;
1726                 translate_y = 0;
1727                 break;
1728         case WL_OUTPUT_TRANSFORM_90:
1729                 angle = M_PI_2;
1730                 translate_x = surface_height;
1731                 translate_y = 0;
1732                 break;
1733         case WL_OUTPUT_TRANSFORM_FLIPPED_90:
1734                 angle = M_PI_2;
1735                 translate_x = surface_height;
1736                 translate_y = surface_width;
1737                 break;
1738         case WL_OUTPUT_TRANSFORM_180:
1739                 angle = M_PI;
1740                 translate_x = surface_width;
1741                 translate_y = surface_height;
1742                 break;
1743         case WL_OUTPUT_TRANSFORM_FLIPPED_180:
1744                 angle = M_PI;
1745                 translate_x = 0;
1746                 translate_y = surface_height;
1747                 break;
1748         case WL_OUTPUT_TRANSFORM_270:
1749                 angle = M_PI + M_PI_2;
1750                 translate_x = 0;
1751                 translate_y = surface_width;
1752                 break;
1753         case WL_OUTPUT_TRANSFORM_FLIPPED_270:
1754                 angle = M_PI + M_PI_2;
1755                 translate_x = 0;
1756                 translate_y = 0;
1757                 break;
1758         }
1759
1760         cairo_scale(cr, scale, scale);
1761         cairo_translate(cr, translate_x, translate_y);
1762         cairo_rotate(cr, angle);
1763         cairo_transform(cr, &m);
1764 }
1765
1766 cairo_t *
1767 widget_cairo_create(struct widget *widget)
1768 {
1769         struct surface *surface = widget->surface;
1770         cairo_surface_t *cairo_surface;
1771         cairo_t *cr;
1772
1773         cairo_surface = widget_get_cairo_surface(widget);
1774         cr = cairo_create(cairo_surface);
1775
1776         widget_cairo_update_transform(widget, cr);
1777
1778         cairo_translate(cr, -surface->allocation.x, -surface->allocation.y);
1779
1780         return cr;
1781 }
1782
1783 struct wl_surface *
1784 widget_get_wl_surface(struct widget *widget)
1785 {
1786         return widget->surface->surface;
1787 }
1788
1789 struct wl_subsurface *
1790 widget_get_wl_subsurface(struct widget *widget)
1791 {
1792         return widget->surface->subsurface;
1793 }
1794
1795 uint32_t
1796 widget_get_last_time(struct widget *widget)
1797 {
1798         return widget->surface->last_time;
1799 }
1800
1801 void
1802 widget_input_region_add(struct widget *widget, const struct rectangle *rect)
1803 {
1804         struct wl_compositor *comp = widget->window->display->compositor;
1805         struct surface *surface = widget->surface;
1806
1807         if (!surface->input_region)
1808                 surface->input_region = wl_compositor_create_region(comp);
1809
1810         if (rect) {
1811                 wl_region_add(surface->input_region,
1812                               rect->x, rect->y, rect->width, rect->height);
1813         }
1814 }
1815
1816 void
1817 widget_set_resize_handler(struct widget *widget,
1818                           widget_resize_handler_t handler)
1819 {
1820         widget->resize_handler = handler;
1821 }
1822
1823 void
1824 widget_set_redraw_handler(struct widget *widget,
1825                           widget_redraw_handler_t handler)
1826 {
1827         widget->redraw_handler = handler;
1828 }
1829
1830 void
1831 widget_set_enter_handler(struct widget *widget, widget_enter_handler_t handler)
1832 {
1833         widget->enter_handler = handler;
1834 }
1835
1836 void
1837 widget_set_leave_handler(struct widget *widget, widget_leave_handler_t handler)
1838 {
1839         widget->leave_handler = handler;
1840 }
1841
1842 void
1843 widget_set_motion_handler(struct widget *widget,
1844                           widget_motion_handler_t handler)
1845 {
1846         widget->motion_handler = handler;
1847 }
1848
1849 void
1850 widget_set_button_handler(struct widget *widget,
1851                           widget_button_handler_t handler)
1852 {
1853         widget->button_handler = handler;
1854 }
1855
1856 void
1857 widget_set_touch_up_handler(struct widget *widget,
1858                             widget_touch_up_handler_t handler)
1859 {
1860         widget->touch_up_handler = handler;
1861 }
1862
1863 void
1864 widget_set_touch_down_handler(struct widget *widget,
1865                               widget_touch_down_handler_t handler)
1866 {
1867         widget->touch_down_handler = handler;
1868 }
1869
1870 void
1871 widget_set_touch_motion_handler(struct widget *widget,
1872                                 widget_touch_motion_handler_t handler)
1873 {
1874         widget->touch_motion_handler = handler;
1875 }
1876
1877 void
1878 widget_set_touch_frame_handler(struct widget *widget,
1879                                widget_touch_frame_handler_t handler)
1880 {
1881         widget->touch_frame_handler = handler;
1882 }
1883
1884 void
1885 widget_set_touch_cancel_handler(struct widget *widget,
1886                                 widget_touch_cancel_handler_t handler)
1887 {
1888         widget->touch_cancel_handler = handler;
1889 }
1890
1891 void
1892 widget_set_axis_handler(struct widget *widget,
1893                         widget_axis_handler_t handler)
1894 {
1895         widget->axis_handler = handler;
1896 }
1897
1898 static void
1899 window_schedule_redraw_task(struct window *window);
1900
1901 void
1902 widget_schedule_redraw(struct widget *widget)
1903 {
1904         DBG_OBJ(widget->surface->surface, "widget %p\n", widget);
1905         widget->surface->redraw_needed = 1;
1906         window_schedule_redraw_task(widget->window);
1907 }
1908
1909 void
1910 widget_set_use_cairo(struct widget *widget,
1911                      int use_cairo)
1912 {
1913         widget->use_cairo = use_cairo;
1914 }
1915
1916 cairo_surface_t *
1917 window_get_surface(struct window *window)
1918 {
1919         cairo_surface_t *cairo_surface;
1920
1921         cairo_surface = widget_get_cairo_surface(window->main_surface->widget);
1922
1923         return cairo_surface_reference(cairo_surface);
1924 }
1925
1926 struct wl_surface *
1927 window_get_wl_surface(struct window *window)
1928 {
1929         return window->main_surface->surface;
1930 }
1931
1932 static void
1933 tooltip_redraw_handler(struct widget *widget, void *data)
1934 {
1935         cairo_t *cr;
1936         const int32_t r = 3;
1937         struct tooltip *tooltip = data;
1938         int32_t width, height;
1939
1940         cr = widget_cairo_create(widget);
1941         cairo_translate(cr, widget->allocation.x, widget->allocation.y);
1942         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1943         cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1944         cairo_paint(cr);
1945
1946         width = widget->allocation.width;
1947         height = widget->allocation.height;
1948         rounded_rect(cr, 0, 0, width, height, r);
1949
1950         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1951         cairo_set_source_rgba(cr, 0.0, 0.0, 0.4, 0.8);
1952         cairo_fill(cr);
1953
1954         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1955         cairo_move_to(cr, 10, 16);
1956         cairo_show_text(cr, tooltip->entry);
1957         cairo_destroy(cr);
1958 }
1959
1960 static cairo_text_extents_t
1961 get_text_extents(struct display *display, struct tooltip *tooltip)
1962 {
1963         cairo_t *cr;
1964         cairo_text_extents_t extents;
1965
1966         /* Use the dummy_surface because tooltip's surface was not
1967          * created yet, and parent does not have a valid surface
1968          * outside repaint, either.
1969          */
1970         cr = cairo_create(display->dummy_surface);
1971         cairo_text_extents(cr, tooltip->entry, &extents);
1972         cairo_destroy(cr);
1973
1974         return extents;
1975 }
1976
1977 static int
1978 window_create_tooltip(struct tooltip *tooltip)
1979 {
1980         struct widget *parent = tooltip->parent;
1981         struct display *display = parent->window->display;
1982         const int offset_y = 27;
1983         const int margin = 3;
1984         cairo_text_extents_t extents;
1985
1986         if (tooltip->widget)
1987                 return 0;
1988
1989         tooltip->widget = window_add_subsurface(parent->window, tooltip, SUBSURFACE_DESYNCHRONIZED);
1990
1991         extents = get_text_extents(display, tooltip);
1992         widget_set_redraw_handler(tooltip->widget, tooltip_redraw_handler);
1993         widget_set_allocation(tooltip->widget,
1994                               tooltip->x, tooltip->y + offset_y,
1995                               extents.width + 20, 20 + margin * 2);
1996
1997         return 0;
1998 }
1999
2000 void
2001 widget_destroy_tooltip(struct widget *parent)
2002 {
2003         struct tooltip *tooltip = parent->tooltip;
2004
2005         parent->tooltip_count = 0;
2006         if (!tooltip)
2007                 return;
2008
2009         if (tooltip->widget) {
2010                 widget_destroy(tooltip->widget);
2011                 tooltip->widget = NULL;
2012         }
2013
2014         close(tooltip->tooltip_fd);
2015         free(tooltip->entry);
2016         free(tooltip);
2017         parent->tooltip = NULL;
2018 }
2019
2020 static void
2021 tooltip_func(struct task *task, uint32_t events)
2022 {
2023         struct tooltip *tooltip =
2024                 container_of(task, struct tooltip, tooltip_task);
2025         uint64_t exp;
2026
2027         if (read(tooltip->tooltip_fd, &exp, sizeof (uint64_t)) != sizeof (uint64_t))
2028                 abort();
2029         window_create_tooltip(tooltip);
2030 }
2031
2032 #define TOOLTIP_TIMEOUT 500
2033 static int
2034 tooltip_timer_reset(struct tooltip *tooltip)
2035 {
2036         struct itimerspec its;
2037
2038         its.it_interval.tv_sec = 0;
2039         its.it_interval.tv_nsec = 0;
2040         its.it_value.tv_sec = TOOLTIP_TIMEOUT / 1000;
2041         its.it_value.tv_nsec = (TOOLTIP_TIMEOUT % 1000) * 1000 * 1000;
2042         if (timerfd_settime(tooltip->tooltip_fd, 0, &its, NULL) < 0) {
2043                 fprintf(stderr, "could not set timerfd\n: %m");
2044                 return -1;
2045         }
2046
2047         return 0;
2048 }
2049
2050 int
2051 widget_set_tooltip(struct widget *parent, char *entry, float x, float y)
2052 {
2053         struct tooltip *tooltip = parent->tooltip;
2054
2055         parent->tooltip_count++;
2056         if (tooltip) {
2057                 tooltip->x = x;
2058                 tooltip->y = y;
2059                 tooltip_timer_reset(tooltip);
2060                 return 0;
2061         }
2062
2063         /* the handler might be triggered too fast via input device motion, so
2064          * we need this check here to make sure tooltip is fully initialized */
2065         if (parent->tooltip_count > 1)
2066                 return 0;
2067
2068         tooltip = malloc(sizeof *tooltip);
2069         if (!tooltip)
2070                 return -1;
2071
2072         parent->tooltip = tooltip;
2073         tooltip->parent = parent;
2074         tooltip->widget = NULL;
2075         tooltip->x = x;
2076         tooltip->y = y;
2077         tooltip->entry = strdup(entry);
2078         tooltip->tooltip_fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
2079         if (tooltip->tooltip_fd < 0) {
2080                 fprintf(stderr, "could not create timerfd\n: %m");
2081                 return -1;
2082         }
2083
2084         tooltip->tooltip_task.run = tooltip_func;
2085         display_watch_fd(parent->window->display, tooltip->tooltip_fd,
2086                          EPOLLIN, &tooltip->tooltip_task);
2087         tooltip_timer_reset(tooltip);
2088
2089         return 0;
2090 }
2091
2092 static void
2093 workspace_manager_state(void *data,
2094                         struct workspace_manager *workspace_manager,
2095                         uint32_t current,
2096                         uint32_t count)
2097 {
2098         struct display *display = data;
2099
2100         display->workspace = current;
2101         display->workspace_count = count;
2102 }
2103
2104 static const struct workspace_manager_listener workspace_manager_listener = {
2105         workspace_manager_state
2106 };
2107
2108 static void
2109 frame_resize_handler(struct widget *widget,
2110                      int32_t width, int32_t height, void *data)
2111 {
2112         struct window_frame *frame = data;
2113         struct widget *child = frame->child;
2114         struct rectangle interior;
2115         struct rectangle input;
2116         struct rectangle opaque;
2117
2118         if (widget->window->fullscreen) {
2119                 interior.x = 0;
2120                 interior.y = 0;
2121                 interior.width = width;
2122                 interior.height = height;
2123         } else {
2124                 frame_resize(frame->frame, width, height);
2125                 frame_interior(frame->frame, &interior.x, &interior.y,
2126                                &interior.width, &interior.height);
2127         }
2128
2129         widget_set_allocation(child, interior.x, interior.y,
2130                               interior.width, interior.height);
2131
2132         if (child->resize_handler) {
2133                 child->resize_handler(child, interior.width, interior.height,
2134                                       child->user_data);
2135
2136                 if (widget->window->fullscreen) {
2137                         width = child->allocation.width;
2138                         height = child->allocation.height;
2139                 } else {
2140                         frame_resize_inside(frame->frame,
2141                                             child->allocation.width,
2142                                             child->allocation.height);
2143                         width = frame_width(frame->frame);
2144                         height = frame_height(frame->frame);
2145                 }
2146         }
2147
2148         widget_set_allocation(widget, 0, 0, width, height);
2149
2150         widget->surface->input_region =
2151                 wl_compositor_create_region(widget->window->display->compositor);
2152         if (!widget->window->fullscreen) {
2153                 frame_input_rect(frame->frame, &input.x, &input.y,
2154                                  &input.width, &input.height);
2155                 wl_region_add(widget->surface->input_region,
2156                               input.x, input.y, input.width, input.height);
2157         } else {
2158                 wl_region_add(widget->surface->input_region, 0, 0, width, height);
2159         }
2160
2161         widget_set_allocation(widget, 0, 0, width, height);
2162
2163         if (child->opaque) {
2164                 if (!widget->window->fullscreen) {
2165                         frame_opaque_rect(frame->frame, &opaque.x, &opaque.y,
2166                                           &opaque.width, &opaque.height);
2167
2168                         wl_region_add(widget->surface->opaque_region,
2169                                       opaque.x, opaque.y,
2170                                       opaque.width, opaque.height);
2171                 } else {
2172                         wl_region_add(widget->surface->opaque_region,
2173                                       0, 0, width, height);
2174                 }
2175         }
2176
2177
2178         widget_schedule_redraw(widget);
2179 }
2180
2181 static void
2182 frame_redraw_handler(struct widget *widget, void *data)
2183 {
2184         cairo_t *cr;
2185         struct window_frame *frame = data;
2186         struct window *window = widget->window;
2187
2188         if (window->fullscreen)
2189                 return;
2190
2191         cr = widget_cairo_create(widget);
2192
2193         frame_repaint(frame->frame, cr);
2194
2195         cairo_destroy(cr);
2196 }
2197
2198 static int
2199 frame_get_pointer_image_for_location(struct window_frame *frame,
2200                                      enum theme_location location)
2201 {
2202         struct window *window = frame->widget->window;
2203
2204         if (window->custom)
2205                 return CURSOR_LEFT_PTR;
2206
2207         switch (location) {
2208         case THEME_LOCATION_RESIZING_TOP:
2209                 return CURSOR_TOP;
2210         case THEME_LOCATION_RESIZING_BOTTOM:
2211                 return CURSOR_BOTTOM;
2212         case THEME_LOCATION_RESIZING_LEFT:
2213                 return CURSOR_LEFT;
2214         case THEME_LOCATION_RESIZING_RIGHT:
2215                 return CURSOR_RIGHT;
2216         case THEME_LOCATION_RESIZING_TOP_LEFT:
2217                 return CURSOR_TOP_LEFT;
2218         case THEME_LOCATION_RESIZING_TOP_RIGHT:
2219                 return CURSOR_TOP_RIGHT;
2220         case THEME_LOCATION_RESIZING_BOTTOM_LEFT:
2221                 return CURSOR_BOTTOM_LEFT;
2222         case THEME_LOCATION_RESIZING_BOTTOM_RIGHT:
2223                 return CURSOR_BOTTOM_RIGHT;
2224         case THEME_LOCATION_EXTERIOR:
2225         case THEME_LOCATION_TITLEBAR:
2226         default:
2227                 return CURSOR_LEFT_PTR;
2228         }
2229 }
2230
2231 static void
2232 frame_menu_func(void *data, struct input *input, int index)
2233 {
2234         struct window *window = data;
2235         struct display *display;
2236
2237         switch (index) {
2238         case 0: /* close */
2239                 window_close(window);
2240                 break;
2241         case 1: /* move to workspace above */
2242                 display = window->display;
2243                 if (display->workspace > 0)
2244                         workspace_manager_move_surface(
2245                                 display->workspace_manager,
2246                                 window->main_surface->surface,
2247                                 display->workspace - 1);
2248                 break;
2249         case 2: /* move to workspace below */
2250                 display = window->display;
2251                 if (display->workspace < display->workspace_count - 1)
2252                         workspace_manager_move_surface(
2253                                 display->workspace_manager,
2254                                 window->main_surface->surface,
2255                                 display->workspace + 1);
2256                 break;
2257         case 3: /* fullscreen */
2258                 /* we don't have a way to get out of fullscreen for now */
2259                 if (window->fullscreen_handler)
2260                         window->fullscreen_handler(window, window->user_data);
2261                 break;
2262         }
2263 }
2264
2265 void
2266 window_show_frame_menu(struct window *window,
2267                        struct input *input, uint32_t time)
2268 {
2269         int32_t x, y;
2270         int count;
2271
2272         static const char *entries[] = {
2273                 "Close",
2274                 "Move to workspace above", "Move to workspace below",
2275                 "Fullscreen"
2276         };
2277
2278         if (window->fullscreen_handler)
2279                 count = ARRAY_LENGTH(entries);
2280         else
2281                 count = ARRAY_LENGTH(entries) - 1;
2282
2283         input_get_position(input, &x, &y);
2284         window_show_menu(window->display, input, time, window,
2285                          x - 10, y - 10, frame_menu_func, entries, count);
2286 }
2287
2288 static int
2289 frame_enter_handler(struct widget *widget,
2290                     struct input *input, float x, float y, void *data)
2291 {
2292         struct window_frame *frame = data;
2293         enum theme_location location;
2294
2295         location = frame_pointer_enter(frame->frame, input, x, y);
2296         if (frame_status(frame->frame) & FRAME_STATUS_REPAINT)
2297                 widget_schedule_redraw(frame->widget);
2298
2299         return frame_get_pointer_image_for_location(data, location);
2300 }
2301
2302 static int
2303 frame_motion_handler(struct widget *widget,
2304                      struct input *input, uint32_t time,
2305                      float x, float y, void *data)
2306 {
2307         struct window_frame *frame = data;
2308         enum theme_location location;
2309
2310         location = frame_pointer_motion(frame->frame, input, x, y);
2311         if (frame_status(frame->frame) & FRAME_STATUS_REPAINT)
2312                 widget_schedule_redraw(frame->widget);
2313
2314         return frame_get_pointer_image_for_location(data, location);
2315 }
2316
2317 static void
2318 frame_leave_handler(struct widget *widget,
2319                     struct input *input, void *data)
2320 {
2321         struct window_frame *frame = data;
2322
2323         frame_pointer_leave(frame->frame, input);
2324         if (frame_status(frame->frame) & FRAME_STATUS_REPAINT)
2325                 widget_schedule_redraw(frame->widget);
2326 }
2327
2328 static void
2329 frame_handle_status(struct window_frame *frame, struct input *input,
2330                     uint32_t time, enum theme_location location)
2331 {
2332         struct window *window = frame->widget->window;
2333         uint32_t status;
2334
2335         status = frame_status(frame->frame);
2336         if (status & FRAME_STATUS_REPAINT)
2337                 widget_schedule_redraw(frame->widget);
2338
2339         if (status & FRAME_STATUS_MINIMIZE) {
2340                 window_set_minimized(window);
2341                 frame_status_clear(frame->frame, FRAME_STATUS_MINIMIZE);
2342         }
2343
2344         if (status & FRAME_STATUS_MENU) {
2345                 window_show_frame_menu(window, input, time);
2346                 frame_status_clear(frame->frame, FRAME_STATUS_MENU);
2347         }
2348
2349         if (status & FRAME_STATUS_MAXIMIZE) {
2350                 window_set_maximized(window, !window->maximized);
2351                 frame_status_clear(frame->frame, FRAME_STATUS_MAXIMIZE);
2352         }
2353
2354         if (status & FRAME_STATUS_CLOSE) {
2355                 window_close(window);
2356                 return;
2357         }
2358
2359         if ((status & FRAME_STATUS_MOVE) && window->xdg_surface) {
2360                 input_ungrab(input);
2361                 xdg_surface_move(window->xdg_surface,
2362                                  input_get_seat(input),
2363                                  window->display->serial);
2364
2365                 frame_status_clear(frame->frame, FRAME_STATUS_MOVE);
2366         }
2367
2368         if ((status & FRAME_STATUS_RESIZE) && window->xdg_surface) {
2369                 input_ungrab(input);
2370
2371                 xdg_surface_resize(window->xdg_surface,
2372                                    input_get_seat(input),
2373                                    window->display->serial,
2374                                    location);
2375
2376                 frame_status_clear(frame->frame, FRAME_STATUS_RESIZE);
2377         }
2378 }
2379
2380 static void
2381 frame_button_handler(struct widget *widget,
2382                      struct input *input, uint32_t time,
2383                      uint32_t button, enum wl_pointer_button_state state,
2384                      void *data)
2385
2386 {
2387         struct window_frame *frame = data;
2388         enum theme_location location;
2389
2390         location = frame_pointer_button(frame->frame, input, button, state);
2391         frame_handle_status(frame, input, time, location);
2392 }
2393
2394 static void
2395 frame_touch_down_handler(struct widget *widget, struct input *input,
2396                          uint32_t serial, uint32_t time, int32_t id,
2397                          float x, float y, void *data)
2398 {
2399         struct window_frame *frame = data;
2400
2401         frame_touch_down(frame->frame, input, id, x, y);
2402         frame_handle_status(frame, input, time, THEME_LOCATION_CLIENT_AREA);
2403 }
2404
2405 static void
2406 frame_touch_up_handler(struct widget *widget,
2407                          struct input *input, uint32_t serial, uint32_t time,
2408                          int32_t id, void *data)
2409 {
2410         struct window_frame *frame = data;
2411
2412         frame_touch_up(frame->frame, input, id);
2413         frame_handle_status(frame, input, time, THEME_LOCATION_CLIENT_AREA);
2414 }
2415
2416 struct widget *
2417 window_frame_create(struct window *window, void *data)
2418 {
2419         struct window_frame *frame;
2420         uint32_t buttons;
2421
2422         if (window->custom) {
2423                 buttons = FRAME_BUTTON_NONE;
2424         } else {
2425                 buttons = FRAME_BUTTON_ALL;
2426         }
2427
2428         frame = xzalloc(sizeof *frame);
2429         frame->frame = frame_create(window->display->theme, 0, 0,
2430                                     buttons, window->title);
2431
2432         frame->widget = window_add_widget(window, frame);
2433         frame->child = widget_add_widget(frame->widget, data);
2434
2435         widget_set_redraw_handler(frame->widget, frame_redraw_handler);
2436         widget_set_resize_handler(frame->widget, frame_resize_handler);
2437         widget_set_enter_handler(frame->widget, frame_enter_handler);
2438         widget_set_leave_handler(frame->widget, frame_leave_handler);
2439         widget_set_motion_handler(frame->widget, frame_motion_handler);
2440         widget_set_button_handler(frame->widget, frame_button_handler);
2441         widget_set_touch_down_handler(frame->widget, frame_touch_down_handler);
2442         widget_set_touch_up_handler(frame->widget, frame_touch_up_handler);
2443
2444         window->frame = frame;
2445
2446         return frame->child;
2447 }
2448
2449 void
2450 window_frame_set_child_size(struct widget *widget, int child_width,
2451                             int child_height)
2452 {
2453         struct display *display = widget->window->display;
2454         struct theme *t = display->theme;
2455         int decoration_width, decoration_height;
2456         int width, height;
2457         int margin = widget->window->maximized ? 0 : t->margin;
2458
2459         if (!widget->window->fullscreen) {
2460                 decoration_width = (t->width + margin) * 2;
2461                 decoration_height = t->width +
2462                         t->titlebar_height + margin * 2;
2463
2464                 width = child_width + decoration_width;
2465                 height = child_height + decoration_height;
2466         } else {
2467                 width = child_width;
2468                 height = child_height;
2469         }
2470
2471         window_schedule_resize(widget->window, width, height);
2472 }
2473
2474 static void
2475 window_frame_destroy(struct window_frame *frame)
2476 {
2477         frame_destroy(frame->frame);
2478
2479         /* frame->child must be destroyed by the application */
2480         widget_destroy(frame->widget);
2481         free(frame);
2482 }
2483
2484 static void
2485 input_set_focus_widget(struct input *input, struct widget *focus,
2486                        float x, float y)
2487 {
2488         struct widget *old, *widget;
2489         int cursor;
2490
2491         if (focus == input->focus_widget)
2492                 return;
2493
2494         old = input->focus_widget;
2495         if (old) {
2496                 widget = old;
2497                 if (input->grab)
2498                         widget = input->grab;
2499                 if (widget->leave_handler)
2500                         widget->leave_handler(old, input, widget->user_data);
2501                 input->focus_widget = NULL;
2502         }
2503
2504         if (focus) {
2505                 widget = focus;
2506                 if (input->grab)
2507                         widget = input->grab;
2508                 input->focus_widget = focus;
2509                 if (widget->enter_handler)
2510                         cursor = widget->enter_handler(focus, input, x, y,
2511                                                        widget->user_data);
2512                 else
2513                         cursor = widget->default_cursor;
2514
2515                 input_set_pointer_image(input, cursor);
2516         }
2517 }
2518
2519 void
2520 touch_grab(struct input  *input, int32_t touch_id)
2521 {
2522         input->touch_grab = 1;
2523         input->touch_grab_id = touch_id;
2524 }
2525
2526 void
2527 touch_ungrab(struct input *input)
2528 {
2529         struct touch_point *tp, *tmp;
2530
2531         input->touch_grab = 0;
2532
2533         wl_list_for_each_safe(tp, tmp,
2534                         &input->touch_point_list, link) {
2535                 if (tp->id != input->touch_grab_id)
2536                         continue;
2537                 wl_list_remove(&tp->link);
2538                 free(tp);
2539
2540                 return;
2541         }
2542 }
2543
2544 void
2545 input_grab(struct input *input, struct widget *widget, uint32_t button)
2546 {
2547         input->grab = widget;
2548         input->grab_button = button;
2549
2550         input_set_focus_widget(input, widget, input->sx, input->sy);
2551 }
2552
2553 void
2554 input_ungrab(struct input *input)
2555 {
2556         struct widget *widget;
2557
2558         input->grab = NULL;
2559         if (input->pointer_focus) {
2560                 widget = window_find_widget(input->pointer_focus,
2561                                             input->sx, input->sy);
2562                 input_set_focus_widget(input, widget, input->sx, input->sy);
2563         }
2564 }
2565
2566 static void
2567 input_remove_pointer_focus(struct input *input)
2568 {
2569         struct window *window = input->pointer_focus;
2570
2571         if (!window)
2572                 return;
2573
2574         input_set_focus_widget(input, NULL, 0, 0);
2575
2576         input->pointer_focus = NULL;
2577         input->current_cursor = CURSOR_UNSET;
2578 }
2579
2580 static void
2581 pointer_handle_enter(void *data, struct wl_pointer *pointer,
2582                      uint32_t serial, struct wl_surface *surface,
2583                      wl_fixed_t sx_w, wl_fixed_t sy_w)
2584 {
2585         struct input *input = data;
2586         struct window *window;
2587         struct widget *widget;
2588         float sx = wl_fixed_to_double(sx_w);
2589         float sy = wl_fixed_to_double(sy_w);
2590
2591         if (!surface) {
2592                 /* enter event for a window we've just destroyed */
2593                 return;
2594         }
2595
2596         window = wl_surface_get_user_data(surface);
2597         if (surface != window->main_surface->surface) {
2598                 DBG("Ignoring input event from subsurface %p\n", surface);
2599                 return;
2600         }
2601
2602         input->display->serial = serial;
2603         input->pointer_enter_serial = serial;
2604         input->pointer_focus = window;
2605
2606         input->sx = sx;
2607         input->sy = sy;
2608
2609         widget = window_find_widget(window, sx, sy);
2610         input_set_focus_widget(input, widget, sx, sy);
2611 }
2612
2613 static void
2614 pointer_handle_leave(void *data, struct wl_pointer *pointer,
2615                      uint32_t serial, struct wl_surface *surface)
2616 {
2617         struct input *input = data;
2618
2619         input->display->serial = serial;
2620         input_remove_pointer_focus(input);
2621 }
2622
2623 static void
2624 pointer_handle_motion(void *data, struct wl_pointer *pointer,
2625                       uint32_t time, wl_fixed_t sx_w, wl_fixed_t sy_w)
2626 {
2627         struct input *input = data;
2628         struct window *window = input->pointer_focus;
2629         struct widget *widget;
2630         int cursor;
2631         float sx = wl_fixed_to_double(sx_w);
2632         float sy = wl_fixed_to_double(sy_w);
2633
2634         if (!window)
2635                 return;
2636
2637         input->sx = sx;
2638         input->sy = sy;
2639
2640         /* when making the window smaller - e.g. after a unmaximise we might
2641          * still have a pending motion event that the compositor has picked
2642          * based on the old surface dimensions
2643          */
2644         if (sx > window->main_surface->allocation.width ||
2645             sy > window->main_surface->allocation.height)
2646                 return;
2647
2648         if (!(input->grab && input->grab_button)) {
2649                 widget = window_find_widget(window, sx, sy);
2650                 input_set_focus_widget(input, widget, sx, sy);
2651         }
2652
2653         if (input->grab)
2654                 widget = input->grab;
2655         else
2656                 widget = input->focus_widget;
2657         if (widget) {
2658                 if (widget->motion_handler)
2659                         cursor = widget->motion_handler(input->focus_widget,
2660                                                         input, time, sx, sy,
2661                                                         widget->user_data);
2662                 else
2663                         cursor = widget->default_cursor;
2664         } else
2665                 cursor = CURSOR_LEFT_PTR;
2666
2667         input_set_pointer_image(input, cursor);
2668 }
2669
2670 static void
2671 pointer_handle_button(void *data, struct wl_pointer *pointer, uint32_t serial,
2672                       uint32_t time, uint32_t button, uint32_t state_w)
2673 {
2674         struct input *input = data;
2675         struct widget *widget;
2676         enum wl_pointer_button_state state = state_w;
2677
2678         input->display->serial = serial;
2679         if (input->focus_widget && input->grab == NULL &&
2680             state == WL_POINTER_BUTTON_STATE_PRESSED)
2681                 input_grab(input, input->focus_widget, button);
2682
2683         widget = input->grab;
2684         if (widget && widget->button_handler)
2685                 (*widget->button_handler)(widget,
2686                                           input, time,
2687                                           button, state,
2688                                           input->grab->user_data);
2689
2690         if (input->grab && input->grab_button == button &&
2691             state == WL_POINTER_BUTTON_STATE_RELEASED)
2692                 input_ungrab(input);
2693 }
2694
2695 static void
2696 pointer_handle_axis(void *data, struct wl_pointer *pointer,
2697                     uint32_t time, uint32_t axis, wl_fixed_t value)
2698 {
2699         struct input *input = data;
2700         struct widget *widget;
2701
2702         widget = input->focus_widget;
2703         if (input->grab)
2704                 widget = input->grab;
2705         if (widget && widget->axis_handler)
2706                 (*widget->axis_handler)(widget,
2707                                         input, time,
2708                                         axis, value,
2709                                         widget->user_data);
2710 }
2711
2712 static const struct wl_pointer_listener pointer_listener = {
2713         pointer_handle_enter,
2714         pointer_handle_leave,
2715         pointer_handle_motion,
2716         pointer_handle_button,
2717         pointer_handle_axis,
2718 };
2719
2720 static void
2721 input_remove_keyboard_focus(struct input *input)
2722 {
2723         struct window *window = input->keyboard_focus;
2724         struct itimerspec its;
2725
2726         its.it_interval.tv_sec = 0;
2727         its.it_interval.tv_nsec = 0;
2728         its.it_value.tv_sec = 0;
2729         its.it_value.tv_nsec = 0;
2730         timerfd_settime(input->repeat_timer_fd, 0, &its, NULL);
2731
2732         if (!window)
2733                 return;
2734
2735         if (window->keyboard_focus_handler)
2736                 (*window->keyboard_focus_handler)(window, NULL,
2737                                                   window->user_data);
2738
2739         input->keyboard_focus = NULL;
2740 }
2741
2742 static void
2743 keyboard_repeat_func(struct task *task, uint32_t events)
2744 {
2745         struct input *input =
2746                 container_of(task, struct input, repeat_task);
2747         struct window *window = input->keyboard_focus;
2748         uint64_t exp;
2749
2750         if (read(input->repeat_timer_fd, &exp, sizeof exp) != sizeof exp)
2751                 /* If we change the timer between the fd becoming
2752                  * readable and getting here, there'll be nothing to
2753                  * read and we get EAGAIN. */
2754                 return;
2755
2756         if (window && window->key_handler) {
2757                 (*window->key_handler)(window, input, input->repeat_time,
2758                                        input->repeat_key, input->repeat_sym,
2759                                        WL_KEYBOARD_KEY_STATE_PRESSED,
2760                                        window->user_data);
2761         }
2762 }
2763
2764 static void
2765 keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard,
2766                        uint32_t format, int fd, uint32_t size)
2767 {
2768         struct input *input = data;
2769         struct xkb_keymap *keymap;
2770         struct xkb_state *state;
2771         char *map_str;
2772
2773         if (!data) {
2774                 close(fd);
2775                 return;
2776         }
2777
2778         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
2779                 close(fd);
2780                 return;
2781         }
2782
2783         map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
2784         if (map_str == MAP_FAILED) {
2785                 close(fd);
2786                 return;
2787         }
2788
2789         keymap = xkb_map_new_from_string(input->display->xkb_context,
2790                                          map_str,
2791                                          XKB_KEYMAP_FORMAT_TEXT_V1,
2792                                          0);
2793         munmap(map_str, size);
2794         close(fd);
2795
2796         if (!keymap) {
2797                 fprintf(stderr, "failed to compile keymap\n");
2798                 return;
2799         }
2800
2801         state = xkb_state_new(keymap);
2802         if (!state) {
2803                 fprintf(stderr, "failed to create XKB state\n");
2804                 xkb_map_unref(keymap);
2805                 return;
2806         }
2807
2808         xkb_keymap_unref(input->xkb.keymap);
2809         xkb_state_unref(input->xkb.state);
2810         input->xkb.keymap = keymap;
2811         input->xkb.state = state;
2812
2813         input->xkb.control_mask =
2814                 1 << xkb_map_mod_get_index(input->xkb.keymap, "Control");
2815         input->xkb.alt_mask =
2816                 1 << xkb_map_mod_get_index(input->xkb.keymap, "Mod1");
2817         input->xkb.shift_mask =
2818                 1 << xkb_map_mod_get_index(input->xkb.keymap, "Shift");
2819 }
2820
2821 static void
2822 keyboard_handle_enter(void *data, struct wl_keyboard *keyboard,
2823                       uint32_t serial, struct wl_surface *surface,
2824                       struct wl_array *keys)
2825 {
2826         struct input *input = data;
2827         struct window *window;
2828
2829         input->display->serial = serial;
2830         input->keyboard_focus = wl_surface_get_user_data(surface);
2831
2832         window = input->keyboard_focus;
2833         if (window->keyboard_focus_handler)
2834                 (*window->keyboard_focus_handler)(window,
2835                                                   input, window->user_data);
2836 }
2837
2838 static void
2839 keyboard_handle_leave(void *data, struct wl_keyboard *keyboard,
2840                       uint32_t serial, struct wl_surface *surface)
2841 {
2842         struct input *input = data;
2843
2844         input->display->serial = serial;
2845         input_remove_keyboard_focus(input);
2846 }
2847
2848 static void
2849 keyboard_handle_key(void *data, struct wl_keyboard *keyboard,
2850                     uint32_t serial, uint32_t time, uint32_t key,
2851                     uint32_t state_w)
2852 {
2853         struct input *input = data;
2854         struct window *window = input->keyboard_focus;
2855         uint32_t code, num_syms;
2856         enum wl_keyboard_key_state state = state_w;
2857         const xkb_keysym_t *syms;
2858         xkb_keysym_t sym;
2859         struct itimerspec its;
2860
2861         input->display->serial = serial;
2862         code = key + 8;
2863         if (!window || !input->xkb.state)
2864                 return;
2865
2866         /* We only use input grabs for pointer events for now, so just
2867          * ignore key presses if a grab is active.  We expand the key
2868          * event delivery mechanism to route events to widgets to
2869          * properly handle key grabs.  In the meantime, this prevents
2870          * key event devlivery while a grab is active. */
2871         if (input->grab && input->grab_button == 0)
2872                 return;
2873
2874         num_syms = xkb_key_get_syms(input->xkb.state, code, &syms);
2875
2876         sym = XKB_KEY_NoSymbol;
2877         if (num_syms == 1)
2878                 sym = syms[0];
2879
2880
2881         if (sym == XKB_KEY_F5 && input->modifiers == MOD_ALT_MASK) {
2882                 if (state == WL_KEYBOARD_KEY_STATE_PRESSED)
2883                         window_set_maximized(window, !window->maximized);
2884         } else if (sym == XKB_KEY_F11 &&
2885                    window->fullscreen_handler &&
2886                    state == WL_KEYBOARD_KEY_STATE_PRESSED) {
2887                 window->fullscreen_handler(window, window->user_data);
2888         } else if (sym == XKB_KEY_F4 &&
2889                    input->modifiers == MOD_ALT_MASK &&
2890                    state == WL_KEYBOARD_KEY_STATE_PRESSED) {
2891                 window_close(window);
2892         } else if (window->key_handler) {
2893                 (*window->key_handler)(window, input, time, key,
2894                                        sym, state, window->user_data);
2895         }
2896
2897         if (state == WL_KEYBOARD_KEY_STATE_RELEASED &&
2898             key == input->repeat_key) {
2899                 its.it_interval.tv_sec = 0;
2900                 its.it_interval.tv_nsec = 0;
2901                 its.it_value.tv_sec = 0;
2902                 its.it_value.tv_nsec = 0;
2903                 timerfd_settime(input->repeat_timer_fd, 0, &its, NULL);
2904         } else if (state == WL_KEYBOARD_KEY_STATE_PRESSED &&
2905                    xkb_keymap_key_repeats(input->xkb.keymap, code)) {
2906                 input->repeat_sym = sym;
2907                 input->repeat_key = key;
2908                 input->repeat_time = time;
2909                 its.it_interval.tv_sec = 0;
2910                 its.it_interval.tv_nsec = 25 * 1000 * 1000;
2911                 its.it_value.tv_sec = 0;
2912                 its.it_value.tv_nsec = 400 * 1000 * 1000;
2913                 timerfd_settime(input->repeat_timer_fd, 0, &its, NULL);
2914         }
2915 }
2916
2917 static void
2918 keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
2919                           uint32_t serial, uint32_t mods_depressed,
2920                           uint32_t mods_latched, uint32_t mods_locked,
2921                           uint32_t group)
2922 {
2923         struct input *input = data;
2924         xkb_mod_mask_t mask;
2925
2926         /* If we're not using a keymap, then we don't handle PC-style modifiers */
2927         if (!input->xkb.keymap)
2928                 return;
2929
2930         xkb_state_update_mask(input->xkb.state, mods_depressed, mods_latched,
2931                               mods_locked, 0, 0, group);
2932         mask = xkb_state_serialize_mods(input->xkb.state,
2933                                         XKB_STATE_DEPRESSED |
2934                                         XKB_STATE_LATCHED);
2935         input->modifiers = 0;
2936         if (mask & input->xkb.control_mask)
2937                 input->modifiers |= MOD_CONTROL_MASK;
2938         if (mask & input->xkb.alt_mask)
2939                 input->modifiers |= MOD_ALT_MASK;
2940         if (mask & input->xkb.shift_mask)
2941                 input->modifiers |= MOD_SHIFT_MASK;
2942 }
2943
2944 static const struct wl_keyboard_listener keyboard_listener = {
2945         keyboard_handle_keymap,
2946         keyboard_handle_enter,
2947         keyboard_handle_leave,
2948         keyboard_handle_key,
2949         keyboard_handle_modifiers,
2950 };
2951
2952 static void
2953 touch_handle_down(void *data, struct wl_touch *wl_touch,
2954                   uint32_t serial, uint32_t time, struct wl_surface *surface,
2955                   int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
2956 {
2957         struct input *input = data;
2958         struct widget *widget;
2959         float sx = wl_fixed_to_double(x_w);
2960         float sy = wl_fixed_to_double(y_w);
2961
2962         input->display->serial = serial;
2963         input->touch_focus = wl_surface_get_user_data(surface);
2964         if (!input->touch_focus) {
2965                 DBG("Failed to find to touch focus for surface %p\n", surface);
2966                 return;
2967         }
2968
2969         if (surface != input->touch_focus->main_surface->surface) {
2970                 DBG("Ignoring input event from subsurface %p\n", surface);
2971                 input->touch_focus = NULL;
2972                 return;
2973         }
2974
2975         if (input->grab)
2976                 widget = input->grab;
2977         else
2978                 widget = window_find_widget(input->touch_focus,
2979                                             wl_fixed_to_double(x_w),
2980                                             wl_fixed_to_double(y_w));
2981         if (widget) {
2982                 struct touch_point *tp = xmalloc(sizeof *tp);
2983                 if (tp) {
2984                         tp->id = id;
2985                         tp->widget = widget;
2986                         tp->x = sx;
2987                         tp->y = sy;
2988                         wl_list_insert(&input->touch_point_list, &tp->link);
2989
2990                         if (widget->touch_down_handler)
2991                                 (*widget->touch_down_handler)(widget, input,
2992                                                               serial, time, id,
2993                                                               sx, sy,
2994                                                               widget->user_data);
2995                 }
2996         }
2997 }
2998
2999 static void
3000 touch_handle_up(void *data, struct wl_touch *wl_touch,
3001                 uint32_t serial, uint32_t time, int32_t id)
3002 {
3003         struct input *input = data;
3004         struct touch_point *tp, *tmp;
3005
3006         if (!input->touch_focus) {
3007                 DBG("No touch focus found for touch up event!\n");
3008                 return;
3009         }
3010
3011         wl_list_for_each_safe(tp, tmp, &input->touch_point_list, link) {
3012                 if (tp->id != id)
3013                         continue;
3014
3015                 if (tp->widget->touch_up_handler)
3016                         (*tp->widget->touch_up_handler)(tp->widget, input, serial,
3017                                                         time, id,
3018                                                         tp->widget->user_data);
3019
3020                 wl_list_remove(&tp->link);
3021                 free(tp);
3022
3023                 return;
3024         }
3025 }
3026
3027 static void
3028 touch_handle_motion(void *data, struct wl_touch *wl_touch,
3029                     uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
3030 {
3031         struct input *input = data;
3032         struct touch_point *tp;
3033         float sx = wl_fixed_to_double(x_w);
3034         float sy = wl_fixed_to_double(y_w);
3035
3036         DBG("touch_handle_motion: %i %i\n", id, wl_list_length(&input->touch_point_list));
3037
3038         if (!input->touch_focus) {
3039                 DBG("No touch focus found for touch motion event!\n");
3040                 return;
3041         }
3042
3043         wl_list_for_each(tp, &input->touch_point_list, link) {
3044                 if (tp->id != id)
3045                         continue;
3046
3047                 tp->x = sx;
3048                 tp->y = sy;
3049                 if (tp->widget->touch_motion_handler)
3050                         (*tp->widget->touch_motion_handler)(tp->widget, input, time,
3051                                                             id, sx, sy,
3052                                                             tp->widget->user_data);
3053                 return;
3054         }
3055 }
3056
3057 static void
3058 touch_handle_frame(void *data, struct wl_touch *wl_touch)
3059 {
3060         struct input *input = data;
3061         struct touch_point *tp, *tmp;
3062
3063         DBG("touch_handle_frame\n");
3064
3065         if (!input->touch_focus) {
3066                 DBG("No touch focus found for touch frame event!\n");
3067                 return;
3068         }
3069
3070         wl_list_for_each_safe(tp, tmp, &input->touch_point_list, link) {
3071                 if (tp->widget->touch_frame_handler)
3072                         (*tp->widget->touch_frame_handler)(tp->widget, input,
3073                                                            tp->widget->user_data);
3074         }
3075 }
3076
3077 static void
3078 touch_handle_cancel(void *data, struct wl_touch *wl_touch)
3079 {
3080         struct input *input = data;
3081         struct touch_point *tp, *tmp;
3082
3083         DBG("touch_handle_cancel\n");
3084
3085         if (!input->touch_focus) {
3086                 DBG("No touch focus found for touch cancel event!\n");
3087                 return;
3088         }
3089
3090         wl_list_for_each_safe(tp, tmp, &input->touch_point_list, link) {
3091                 if (tp->widget->touch_cancel_handler)
3092                         (*tp->widget->touch_cancel_handler)(tp->widget, input,
3093                                                             tp->widget->user_data);
3094
3095                 wl_list_remove(&tp->link);
3096                 free(tp);
3097         }
3098 }
3099
3100 static const struct wl_touch_listener touch_listener = {
3101         touch_handle_down,
3102         touch_handle_up,
3103         touch_handle_motion,
3104         touch_handle_frame,
3105         touch_handle_cancel,
3106 };
3107
3108 static void
3109 seat_handle_capabilities(void *data, struct wl_seat *seat,
3110                          enum wl_seat_capability caps)
3111 {
3112         struct input *input = data;
3113
3114         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
3115                 input->pointer = wl_seat_get_pointer(seat);
3116                 wl_pointer_set_user_data(input->pointer, input);
3117                 wl_pointer_add_listener(input->pointer, &pointer_listener,
3118                                         input);
3119         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
3120                 wl_pointer_destroy(input->pointer);
3121                 input->pointer = NULL;
3122         }
3123
3124         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
3125                 input->keyboard = wl_seat_get_keyboard(seat);
3126                 wl_keyboard_set_user_data(input->keyboard, input);
3127                 wl_keyboard_add_listener(input->keyboard, &keyboard_listener,
3128                                          input);
3129         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
3130                 wl_keyboard_destroy(input->keyboard);
3131                 input->keyboard = NULL;
3132         }
3133
3134         if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !input->touch) {
3135                 input->touch = wl_seat_get_touch(seat);
3136                 wl_touch_set_user_data(input->touch, input);
3137                 wl_touch_add_listener(input->touch, &touch_listener, input);
3138         } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && input->touch) {
3139                 wl_touch_destroy(input->touch);
3140                 input->touch = NULL;
3141         }
3142 }
3143
3144 static void
3145 seat_handle_name(void *data, struct wl_seat *seat,
3146                  const char *name)
3147 {
3148
3149 }
3150
3151 static const struct wl_seat_listener seat_listener = {
3152         seat_handle_capabilities,
3153         seat_handle_name
3154 };
3155
3156 void
3157 input_get_position(struct input *input, int32_t *x, int32_t *y)
3158 {
3159         *x = input->sx;
3160         *y = input->sy;
3161 }
3162
3163 int
3164 input_get_touch(struct input *input, int32_t id, float *x, float *y)
3165 {
3166         struct touch_point *tp;
3167
3168         wl_list_for_each(tp, &input->touch_point_list, link) {
3169                 if (tp->id != id)
3170                         continue;
3171
3172                 *x = tp->x;
3173                 *y = tp->y;
3174                 return 0;
3175         }
3176
3177         return -1;
3178 }
3179
3180 struct display *
3181 input_get_display(struct input *input)
3182 {
3183         return input->display;
3184 }
3185
3186 struct wl_seat *
3187 input_get_seat(struct input *input)
3188 {
3189         return input->seat;
3190 }
3191
3192 uint32_t
3193 input_get_modifiers(struct input *input)
3194 {
3195         return input->modifiers;
3196 }
3197
3198 struct widget *
3199 input_get_focus_widget(struct input *input)
3200 {
3201         return input->focus_widget;
3202 }
3203
3204 struct data_offer {
3205         struct wl_data_offer *offer;
3206         struct input *input;
3207         struct wl_array types;
3208         int refcount;
3209
3210         struct task io_task;
3211         int fd;
3212         data_func_t func;
3213         int32_t x, y;
3214         void *user_data;
3215 };
3216
3217 static void
3218 data_offer_offer(void *data, struct wl_data_offer *wl_data_offer, const char *type)
3219 {
3220         struct data_offer *offer = data;
3221         char **p;
3222
3223         p = wl_array_add(&offer->types, sizeof *p);
3224         *p = strdup(type);
3225 }
3226
3227 static const struct wl_data_offer_listener data_offer_listener = {
3228         data_offer_offer,
3229 };
3230
3231 static void
3232 data_offer_destroy(struct data_offer *offer)
3233 {
3234         char **p;
3235
3236         offer->refcount--;
3237         if (offer->refcount == 0) {
3238                 wl_data_offer_destroy(offer->offer);
3239                 for (p = offer->types.data; *p; p++)
3240                         free(*p);
3241                 wl_array_release(&offer->types);
3242                 free(offer);
3243         }
3244 }
3245
3246 static void
3247 data_device_data_offer(void *data,
3248                        struct wl_data_device *data_device,
3249                        struct wl_data_offer *_offer)
3250 {
3251         struct data_offer *offer;
3252
3253         offer = xmalloc(sizeof *offer);
3254
3255         wl_array_init(&offer->types);
3256         offer->refcount = 1;
3257         offer->input = data;
3258         offer->offer = _offer;
3259         wl_data_offer_add_listener(offer->offer,
3260                                    &data_offer_listener, offer);
3261 }
3262
3263 static void
3264 data_device_enter(void *data, struct wl_data_device *data_device,
3265                   uint32_t serial, struct wl_surface *surface,
3266                   wl_fixed_t x_w, wl_fixed_t y_w,
3267                   struct wl_data_offer *offer)
3268 {
3269         struct input *input = data;
3270         struct window *window;
3271         void *types_data;
3272         float x = wl_fixed_to_double(x_w);
3273         float y = wl_fixed_to_double(y_w);
3274         char **p;
3275
3276         window = wl_surface_get_user_data(surface);
3277         input->drag_enter_serial = serial;
3278         input->drag_focus = window,
3279         input->drag_x = x;
3280         input->drag_y = y;
3281
3282         if (!input->touch_grab)
3283                 input->pointer_enter_serial = serial;
3284
3285         if (offer) {
3286                 input->drag_offer = wl_data_offer_get_user_data(offer);
3287
3288                 p = wl_array_add(&input->drag_offer->types, sizeof *p);
3289                 *p = NULL;
3290
3291                 types_data = input->drag_offer->types.data;
3292         } else {
3293                 input->drag_offer = NULL;
3294                 types_data = NULL;
3295         }
3296
3297         if (window->data_handler)
3298                 window->data_handler(window, input, x, y, types_data,
3299                                      window->user_data);
3300 }
3301
3302 static void
3303 data_device_leave(void *data, struct wl_data_device *data_device)
3304 {
3305         struct input *input = data;
3306
3307         if (input->drag_offer) {
3308                 data_offer_destroy(input->drag_offer);
3309                 input->drag_offer = NULL;
3310         }
3311 }
3312
3313 static void
3314 data_device_motion(void *data, struct wl_data_device *data_device,
3315                    uint32_t time, wl_fixed_t x_w, wl_fixed_t y_w)
3316 {
3317         struct input *input = data;
3318         struct window *window = input->drag_focus;
3319         float x = wl_fixed_to_double(x_w);
3320         float y = wl_fixed_to_double(y_w);
3321         void *types_data;
3322
3323         input->drag_x = x;
3324         input->drag_y = y;
3325
3326         if (input->drag_offer)
3327                 types_data = input->drag_offer->types.data;
3328         else
3329                 types_data = NULL;
3330
3331         if (window->data_handler)
3332                 window->data_handler(window, input, x, y, types_data,
3333                                      window->user_data);
3334 }
3335
3336 static void
3337 data_device_drop(void *data, struct wl_data_device *data_device)
3338 {
3339         struct input *input = data;
3340         struct window *window = input->drag_focus;
3341         float x, y;
3342
3343         x = input->drag_x;
3344         y = input->drag_y;
3345
3346         if (window->drop_handler)
3347                 window->drop_handler(window, input,
3348                                      x, y, window->user_data);
3349
3350         if (input->touch_grab)
3351                 touch_ungrab(input);
3352 }
3353
3354 static void
3355 data_device_selection(void *data,
3356                       struct wl_data_device *wl_data_device,
3357                       struct wl_data_offer *offer)
3358 {
3359         struct input *input = data;
3360         char **p;
3361
3362         if (input->selection_offer)
3363                 data_offer_destroy(input->selection_offer);
3364
3365         if (offer) {
3366                 input->selection_offer = wl_data_offer_get_user_data(offer);
3367                 p = wl_array_add(&input->selection_offer->types, sizeof *p);
3368                 *p = NULL;
3369         } else {
3370                 input->selection_offer = NULL;
3371         }
3372 }
3373
3374 static const struct wl_data_device_listener data_device_listener = {
3375         data_device_data_offer,
3376         data_device_enter,
3377         data_device_leave,
3378         data_device_motion,
3379         data_device_drop,
3380         data_device_selection
3381 };
3382
3383 static void
3384 input_set_pointer_image_index(struct input *input, int index)
3385 {
3386         struct wl_buffer *buffer;
3387         struct wl_cursor *cursor;
3388         struct wl_cursor_image *image;
3389
3390         if (!input->pointer)
3391                 return;
3392
3393         cursor = input->display->cursors[input->current_cursor];
3394         if (!cursor)
3395                 return;
3396
3397         if (index >= (int) cursor->image_count) {
3398                 fprintf(stderr, "cursor index out of range\n");
3399                 return;
3400         }
3401
3402         image = cursor->images[index];
3403         buffer = wl_cursor_image_get_buffer(image);
3404         if (!buffer)
3405                 return;
3406
3407         wl_surface_attach(input->pointer_surface, buffer, 0, 0);
3408         wl_surface_damage(input->pointer_surface, 0, 0,
3409                           image->width, image->height);
3410         wl_surface_commit(input->pointer_surface);
3411         wl_pointer_set_cursor(input->pointer, input->pointer_enter_serial,
3412                               input->pointer_surface,
3413                               image->hotspot_x, image->hotspot_y);
3414 }
3415
3416 static const struct wl_callback_listener pointer_surface_listener;
3417
3418 static void
3419 pointer_surface_frame_callback(void *data, struct wl_callback *callback,
3420                                uint32_t time)
3421 {
3422         struct input *input = data;
3423         struct wl_cursor *cursor;
3424         int i;
3425
3426         if (callback) {
3427                 assert(callback == input->cursor_frame_cb);
3428                 wl_callback_destroy(callback);
3429                 input->cursor_frame_cb = NULL;
3430         }
3431
3432         if (!input->pointer)
3433                 return;
3434
3435         if (input->current_cursor == CURSOR_BLANK) {
3436                 wl_pointer_set_cursor(input->pointer,
3437                                       input->pointer_enter_serial,
3438                                       NULL, 0, 0);
3439                 return;
3440         }
3441
3442         if (input->current_cursor == CURSOR_UNSET)
3443                 return;
3444         cursor = input->display->cursors[input->current_cursor];
3445         if (!cursor)
3446                 return;
3447
3448         /* FIXME We don't have the current time on the first call so we set
3449          * the animation start to the time of the first frame callback. */
3450         if (time == 0)
3451                 input->cursor_anim_start = 0;
3452         else if (input->cursor_anim_start == 0)
3453                 input->cursor_anim_start = time;
3454
3455         if (time == 0 || input->cursor_anim_start == 0)
3456                 i = 0;
3457         else
3458                 i = wl_cursor_frame(cursor, time - input->cursor_anim_start);
3459
3460         if (cursor->image_count > 1) {
3461                 input->cursor_frame_cb =
3462                         wl_surface_frame(input->pointer_surface);
3463                 wl_callback_add_listener(input->cursor_frame_cb,
3464                                          &pointer_surface_listener, input);
3465         }
3466
3467         input_set_pointer_image_index(input, i);
3468 }
3469
3470 static const struct wl_callback_listener pointer_surface_listener = {
3471         pointer_surface_frame_callback
3472 };
3473
3474 void
3475 input_set_pointer_image(struct input *input, int pointer)
3476 {
3477         int force = 0;
3478
3479         if (!input->pointer)
3480                 return;
3481
3482         if (input->pointer_enter_serial > input->cursor_serial)
3483                 force = 1;
3484
3485         if (!force && pointer == input->current_cursor)
3486                 return;
3487
3488         input->current_cursor = pointer;
3489         input->cursor_serial = input->pointer_enter_serial;
3490         if (!input->cursor_frame_cb)
3491                 pointer_surface_frame_callback(input, NULL, 0);
3492         else if (force) {
3493                 /* The current frame callback may be stuck if, for instance,
3494                  * the set cursor request was processed by the server after
3495                  * this client lost the focus. In this case the cursor surface
3496                  * might not be mapped and the frame callback wouldn't ever
3497                  * complete. Send a set_cursor and attach to try to map the
3498                  * cursor surface again so that the callback will finish */
3499                 input_set_pointer_image_index(input, 0);
3500         }
3501 }
3502
3503 struct wl_data_device *
3504 input_get_data_device(struct input *input)
3505 {
3506         return input->data_device;
3507 }
3508
3509 void
3510 input_set_selection(struct input *input,
3511                     struct wl_data_source *source, uint32_t time)
3512 {
3513         if (input->data_device)
3514                 wl_data_device_set_selection(input->data_device, source, time);
3515 }
3516
3517 void
3518 input_accept(struct input *input, const char *type)
3519 {
3520         wl_data_offer_accept(input->drag_offer->offer,
3521                              input->drag_enter_serial, type);
3522 }
3523
3524 static void
3525 offer_io_func(struct task *task, uint32_t events)
3526 {
3527         struct data_offer *offer =
3528                 container_of(task, struct data_offer, io_task);
3529         unsigned int len;
3530         char buffer[4096];
3531
3532         len = read(offer->fd, buffer, sizeof buffer);
3533         offer->func(buffer, len,
3534                     offer->x, offer->y, offer->user_data);
3535
3536         if (len == 0) {
3537                 close(offer->fd);
3538                 data_offer_destroy(offer);
3539         }
3540 }
3541
3542 static void
3543 data_offer_receive_data(struct data_offer *offer, const char *mime_type,
3544                         data_func_t func, void *user_data)
3545 {
3546         int p[2];
3547
3548         if (pipe2(p, O_CLOEXEC) == -1)
3549                 return;
3550
3551         wl_data_offer_receive(offer->offer, mime_type, p[1]);
3552         close(p[1]);
3553
3554         offer->io_task.run = offer_io_func;
3555         offer->fd = p[0];
3556         offer->func = func;
3557         offer->refcount++;
3558         offer->user_data = user_data;
3559
3560         display_watch_fd(offer->input->display,
3561                          offer->fd, EPOLLIN, &offer->io_task);
3562 }
3563
3564 void
3565 input_receive_drag_data(struct input *input, const char *mime_type,
3566                         data_func_t func, void *data)
3567 {
3568         data_offer_receive_data(input->drag_offer, mime_type, func, data);
3569         input->drag_offer->x = input->drag_x;
3570         input->drag_offer->y = input->drag_y;
3571 }
3572
3573 int
3574 input_receive_drag_data_to_fd(struct input *input,
3575                               const char *mime_type, int fd)
3576 {
3577         if (input->drag_offer)
3578                 wl_data_offer_receive(input->drag_offer->offer, mime_type, fd);
3579
3580         return 0;
3581 }
3582
3583 int
3584 input_receive_selection_data(struct input *input, const char *mime_type,
3585                              data_func_t func, void *data)
3586 {
3587         char **p;
3588
3589         if (input->selection_offer == NULL)
3590                 return -1;
3591
3592         for (p = input->selection_offer->types.data; *p; p++)
3593                 if (strcmp(mime_type, *p) == 0)
3594                         break;
3595
3596         if (*p == NULL)
3597                 return -1;
3598
3599         data_offer_receive_data(input->selection_offer,
3600                                 mime_type, func, data);
3601         return 0;
3602 }
3603
3604 int
3605 input_receive_selection_data_to_fd(struct input *input,
3606                                    const char *mime_type, int fd)
3607 {
3608         if (input->selection_offer)
3609                 wl_data_offer_receive(input->selection_offer->offer,
3610                                       mime_type, fd);
3611
3612         return 0;
3613 }
3614
3615 void
3616 window_move(struct window *window, struct input *input, uint32_t serial)
3617 {
3618         if (!window->xdg_surface)
3619                 return;
3620
3621         xdg_surface_move(window->xdg_surface, input->seat, serial);
3622 }
3623
3624 static void
3625 surface_set_synchronized(struct surface *surface)
3626 {
3627         if (!surface->subsurface)
3628                 return;
3629
3630         if (surface->synchronized)
3631                 return;
3632
3633         wl_subsurface_set_sync(surface->subsurface);
3634         surface->synchronized = 1;
3635 }
3636
3637 static void
3638 surface_set_synchronized_default(struct surface *surface)
3639 {
3640         if (!surface->subsurface)
3641                 return;
3642
3643         if (surface->synchronized == surface->synchronized_default)
3644                 return;
3645
3646         if (surface->synchronized_default)
3647                 wl_subsurface_set_sync(surface->subsurface);
3648         else
3649                 wl_subsurface_set_desync(surface->subsurface);
3650
3651         surface->synchronized = surface->synchronized_default;
3652 }
3653
3654 static void
3655 surface_resize(struct surface *surface)
3656 {
3657         struct widget *widget = surface->widget;
3658         struct wl_compositor *compositor = widget->window->display->compositor;
3659
3660         if (surface->input_region) {
3661                 wl_region_destroy(surface->input_region);
3662                 surface->input_region = NULL;
3663         }
3664
3665         if (surface->opaque_region)
3666                 wl_region_destroy(surface->opaque_region);
3667
3668         surface->opaque_region = wl_compositor_create_region(compositor);
3669
3670         if (widget->resize_handler)
3671                 widget->resize_handler(widget,
3672                                        widget->allocation.width,
3673                                        widget->allocation.height,
3674                                        widget->user_data);
3675
3676         if (surface->subsurface &&
3677             (surface->allocation.x != widget->allocation.x ||
3678              surface->allocation.y != widget->allocation.y)) {
3679                 wl_subsurface_set_position(surface->subsurface,
3680                                            widget->allocation.x,
3681                                            widget->allocation.y);
3682         }
3683         if (surface->allocation.width != widget->allocation.width ||
3684             surface->allocation.height != widget->allocation.height) {
3685                 window_schedule_redraw(widget->window);
3686         }
3687         surface->allocation = widget->allocation;
3688
3689         if (widget->opaque)
3690                 wl_region_add(surface->opaque_region, 0, 0,
3691                               widget->allocation.width,
3692                               widget->allocation.height);
3693 }
3694
3695 static void
3696 hack_prevent_EGL_sub_surface_deadlock(struct window *window)
3697 {
3698         /*
3699          * This hack should be removed, when EGL respects
3700          * eglSwapInterval(0).
3701          *
3702          * If this window has sub-surfaces, especially a free-running
3703          * EGL-widget, we need to post the parent surface once with
3704          * all the old state to guarantee, that the EGL-widget will
3705          * receive its frame callback soon. Otherwise, a forced call
3706          * to eglSwapBuffers may end up blocking, waiting for a frame
3707          * event that will never come, because we will commit the parent
3708          * surface with all new state only after eglSwapBuffers returns.
3709          *
3710          * This assumes, that:
3711          * 1. When the EGL widget's resize hook is called, it pauses.
3712          * 2. When the EGL widget's redraw hook is called, it forces a
3713          *    repaint and a call to eglSwapBuffers(), and maybe resumes.
3714          * In a single threaded application condition 1 is a no-op.
3715          *
3716          * XXX: This should actually be after the surface_resize() calls,
3717          * but cannot, because then it would commit the incomplete state
3718          * accumulated from the widget resize hooks.
3719          */
3720         if (window->subsurface_list.next != &window->main_surface->link ||
3721             window->subsurface_list.prev != &window->main_surface->link)
3722                 wl_surface_commit(window->main_surface->surface);
3723 }
3724
3725 static void
3726 window_do_resize(struct window *window)
3727 {
3728         struct surface *surface;
3729
3730         widget_set_allocation(window->main_surface->widget,
3731                               window->pending_allocation.x,
3732                               window->pending_allocation.y,
3733                               window->pending_allocation.width,
3734                               window->pending_allocation.height);
3735
3736         surface_resize(window->main_surface);
3737
3738         /* The main surface is in the list, too. Main surface's
3739          * resize_handler is responsible for calling widget_set_allocation()
3740          * on all sub-surface root widgets, so they will be resized
3741          * properly.
3742          */
3743         wl_list_for_each(surface, &window->subsurface_list, link) {
3744                 if (surface == window->main_surface)
3745                         continue;
3746
3747                 surface_set_synchronized(surface);
3748                 surface_resize(surface);
3749         }
3750
3751         if (!window->fullscreen && !window->maximized)
3752                 window->saved_allocation = window->pending_allocation;
3753 }
3754
3755 static void
3756 idle_resize(struct window *window)
3757 {
3758         window->resize_needed = 0;
3759         window->redraw_needed = 1;
3760
3761         DBG("from %dx%d to %dx%d\n",
3762             window->main_surface->server_allocation.width,
3763             window->main_surface->server_allocation.height,
3764             window->pending_allocation.width,
3765             window->pending_allocation.height);
3766
3767         hack_prevent_EGL_sub_surface_deadlock(window);
3768
3769         window_do_resize(window);
3770 }
3771
3772 static void
3773 undo_resize(struct window *window)
3774 {
3775         window->pending_allocation.width =
3776                 window->main_surface->server_allocation.width;
3777         window->pending_allocation.height =
3778                 window->main_surface->server_allocation.height;
3779
3780         DBG("back to %dx%d\n",
3781             window->main_surface->server_allocation.width,
3782             window->main_surface->server_allocation.height);
3783
3784         window_do_resize(window);
3785
3786         if (window->pending_allocation.width == 0 &&
3787             window->pending_allocation.height == 0) {
3788                 fprintf(stderr, "Error: Could not draw a surface, "
3789                         "most likely due to insufficient disk space in "
3790                         "%s (XDG_RUNTIME_DIR).\n", getenv("XDG_RUNTIME_DIR"));
3791                 exit(EXIT_FAILURE);
3792         }
3793 }
3794
3795 void
3796 window_schedule_resize(struct window *window, int width, int height)
3797 {
3798         /* We should probably get these numbers from the theme. */
3799         const int min_width = 200, min_height = 200;
3800
3801         window->pending_allocation.x = 0;
3802         window->pending_allocation.y = 0;
3803         window->pending_allocation.width = width;
3804         window->pending_allocation.height = height;
3805
3806         if (window->min_allocation.width == 0) {
3807                 if (width < min_width && window->frame)
3808                         window->min_allocation.width = min_width;
3809                 else
3810                         window->min_allocation.width = width;
3811                 if (height < min_height && window->frame)
3812                         window->min_allocation.height = min_height;
3813                 else
3814                         window->min_allocation.height = height;
3815         }
3816
3817         if (window->pending_allocation.width < window->min_allocation.width)
3818                 window->pending_allocation.width = window->min_allocation.width;
3819         if (window->pending_allocation.height < window->min_allocation.height)
3820                 window->pending_allocation.height = window->min_allocation.height;
3821
3822         window->resize_needed = 1;
3823         window_schedule_redraw(window);
3824 }
3825
3826 void
3827 widget_schedule_resize(struct widget *widget, int32_t width, int32_t height)
3828 {
3829         window_schedule_resize(widget->window, width, height);
3830 }
3831
3832 static void
3833 handle_surface_configure(void *data, struct xdg_surface *xdg_surface,
3834                          int32_t width, int32_t height,
3835                          struct wl_array *states, uint32_t serial)
3836 {
3837         struct window *window = data;
3838         uint32_t *p;
3839
3840         window->maximized = 0;
3841         window->fullscreen = 0;
3842         window->resizing = 0;
3843         window->focused = 0;
3844
3845         wl_array_for_each(p, states) {
3846                 uint32_t state = *p;
3847                 switch (state) {
3848                 case XDG_SURFACE_STATE_MAXIMIZED:
3849                         window->maximized = 1;
3850                         break;
3851                 case XDG_SURFACE_STATE_FULLSCREEN:
3852                         window->fullscreen = 1;
3853                         break;
3854                 case XDG_SURFACE_STATE_RESIZING:
3855                         window->resizing = 1;
3856                         break;
3857                 case XDG_SURFACE_STATE_ACTIVATED:
3858                         window->focused = 1;
3859                         break;
3860                 default:
3861                         /* Unknown state */
3862                         break;
3863                 }
3864         }
3865
3866         if (window->frame) {
3867                 if (window->maximized) {
3868                         frame_set_flag(window->frame->frame, FRAME_FLAG_MAXIMIZED);
3869                 } else {
3870                         frame_unset_flag(window->frame->frame, FRAME_FLAG_MAXIMIZED);
3871                 }
3872
3873                 if (window->focused) {
3874                         frame_set_flag(window->frame->frame, FRAME_FLAG_ACTIVE);
3875                 } else {
3876                         frame_unset_flag(window->frame->frame, FRAME_FLAG_ACTIVE);
3877                 }
3878         }
3879
3880         if (width > 0 && height > 0) {
3881                 window_schedule_resize(window, width, height);
3882         } else {
3883                 window_schedule_resize(window,
3884                                        window->saved_allocation.width,
3885                                        window->saved_allocation.height);
3886         }
3887
3888         xdg_surface_ack_configure(window->xdg_surface, serial);
3889
3890         if (window->state_changed_handler)
3891                 window->state_changed_handler(window, window->user_data);
3892 }
3893
3894 static void
3895 handle_surface_delete(void *data, struct xdg_surface *xdg_surface)
3896 {
3897         struct window *window = data;
3898         window_close(window);
3899 }
3900
3901 static const struct xdg_surface_listener xdg_surface_listener = {
3902         handle_surface_configure,
3903         handle_surface_delete,
3904 };
3905
3906 static void
3907 window_sync_parent(struct window *window)
3908 {
3909         struct wl_surface *parent_surface;
3910
3911         if (!window->xdg_surface)
3912                 return;
3913
3914         if (window->parent)
3915                 parent_surface = window->parent->main_surface->surface;
3916         else
3917                 parent_surface = NULL;
3918
3919         xdg_surface_set_parent(window->xdg_surface, parent_surface);
3920 }
3921
3922 static void
3923 window_sync_margin(struct window *window)
3924 {
3925         int margin;
3926
3927         if (!window->xdg_surface)
3928                 return;
3929
3930         if (!window->frame)
3931                 return;
3932
3933         margin = frame_get_shadow_margin(window->frame->frame);
3934
3935         /* Shadow size is the same on every side. */
3936         xdg_surface_set_margin(window->xdg_surface,
3937                                      margin,
3938                                      margin,
3939                                      margin,
3940                                      margin);
3941 }
3942
3943 static void
3944 window_flush(struct window *window)
3945 {
3946         struct surface *surface;
3947
3948         if (!window->custom) {
3949                 if (window->xdg_surface) {
3950                         window_sync_parent(window);
3951                         window_sync_margin(window);
3952                 }
3953         }
3954
3955         wl_list_for_each(surface, &window->subsurface_list, link) {
3956                 if (surface == window->main_surface)
3957                         continue;
3958
3959                 surface_flush(surface);
3960         }
3961
3962         surface_flush(window->main_surface);
3963 }
3964
3965 static void
3966 menu_destroy(struct menu *menu)
3967 {
3968         widget_destroy(menu->widget);
3969         window_destroy(menu->window);
3970         frame_destroy(menu->frame);
3971         free(menu);
3972 }
3973
3974 void
3975 window_get_allocation(struct window *window,
3976                       struct rectangle *allocation)
3977 {
3978         *allocation = window->main_surface->allocation;
3979 }
3980
3981 static void
3982 widget_redraw(struct widget *widget)
3983 {
3984         struct widget *child;
3985
3986         if (widget->redraw_handler)
3987                 widget->redraw_handler(widget, widget->user_data);
3988         wl_list_for_each(child, &widget->child_list, link)
3989                 widget_redraw(child);
3990 }
3991
3992 static void
3993 frame_callback(void *data, struct wl_callback *callback, uint32_t time)
3994 {
3995         struct surface *surface = data;
3996
3997         assert(callback == surface->frame_cb);
3998         DBG_OBJ(callback, "done\n");
3999         wl_callback_destroy(callback);
4000         surface->frame_cb = NULL;
4001
4002         surface->last_time = time;
4003
4004         if (surface->redraw_needed || surface->window->redraw_needed) {
4005                 DBG_OBJ(surface->surface, "window_schedule_redraw_task\n");
4006                 window_schedule_redraw_task(surface->window);
4007         }
4008 }
4009
4010 static const struct wl_callback_listener listener = {
4011         frame_callback
4012 };
4013
4014 static int
4015 surface_redraw(struct surface *surface)
4016 {
4017         DBG_OBJ(surface->surface, "begin\n");
4018
4019         if (!surface->window->redraw_needed && !surface->redraw_needed)
4020                 return 0;
4021
4022         /* Whole-window redraw forces a redraw even if the previous has
4023          * not yet hit the screen.
4024          */
4025         if (surface->frame_cb) {
4026                 if (!surface->window->redraw_needed)
4027                         return 0;
4028
4029                 DBG_OBJ(surface->frame_cb, "cancelled\n");
4030                 wl_callback_destroy(surface->frame_cb);
4031         }
4032
4033         if (surface->widget->use_cairo &&
4034             !widget_get_cairo_surface(surface->widget)) {
4035                 DBG_OBJ(surface->surface, "cancelled due buffer failure\n");
4036                 return -1;
4037         }
4038
4039         surface->frame_cb = wl_surface_frame(surface->surface);
4040         wl_callback_add_listener(surface->frame_cb, &listener, surface);
4041         DBG_OBJ(surface->frame_cb, "new\n");
4042
4043         surface->redraw_needed = 0;
4044         DBG_OBJ(surface->surface, "-> widget_redraw\n");
4045         widget_redraw(surface->widget);
4046         DBG_OBJ(surface->surface, "done\n");
4047         return 0;
4048 }
4049
4050 static void
4051 idle_redraw(struct task *task, uint32_t events)
4052 {
4053         struct window *window = container_of(task, struct window, redraw_task);
4054         struct surface *surface;
4055         int failed = 0;
4056         int resized = 0;
4057
4058         DBG(" --------- \n");
4059
4060         wl_list_init(&window->redraw_task.link);
4061         window->redraw_task_scheduled = 0;
4062
4063         if (window->resize_needed) {
4064                 /* throttle resizing to the main surface display */
4065                 if (window->main_surface->frame_cb) {
4066                         DBG_OBJ(window->main_surface->frame_cb, "pending\n");
4067                         return;
4068                 }
4069
4070                 idle_resize(window);
4071                 resized = 1;
4072         }
4073
4074         if (surface_redraw(window->main_surface) < 0) {
4075                 /*
4076                  * Only main_surface failure will cause us to undo the resize.
4077                  * If sub-surfaces fail, they will just be broken with old
4078                  * content.
4079                  */
4080                 failed = 1;
4081         } else {
4082                 wl_list_for_each(surface, &window->subsurface_list, link) {
4083                         if (surface == window->main_surface)
4084                                 continue;
4085
4086                         surface_redraw(surface);
4087                 }
4088         }
4089
4090         window->redraw_needed = 0;
4091         window_flush(window);
4092
4093         wl_list_for_each(surface, &window->subsurface_list, link)
4094                 surface_set_synchronized_default(surface);
4095
4096         if (resized && failed) {
4097                 /* Restore widget tree to correspond to what is on screen. */
4098                 undo_resize(window);
4099         }
4100 }
4101
4102 static void
4103 window_schedule_redraw_task(struct window *window)
4104 {
4105         if (!window->redraw_task_scheduled) {
4106                 window->redraw_task.run = idle_redraw;
4107                 display_defer(window->display, &window->redraw_task);
4108                 window->redraw_task_scheduled = 1;
4109         }
4110 }
4111
4112 void
4113 window_schedule_redraw(struct window *window)
4114 {
4115         struct surface *surface;
4116
4117         DBG_OBJ(window->main_surface->surface, "window %p\n", window);
4118
4119         wl_list_for_each(surface, &window->subsurface_list, link)
4120                 surface->redraw_needed = 1;
4121
4122         window_schedule_redraw_task(window);
4123 }
4124
4125 int
4126 window_is_fullscreen(struct window *window)
4127 {
4128         return window->fullscreen;
4129 }
4130
4131 void
4132 window_set_fullscreen(struct window *window, int fullscreen)
4133 {
4134         if (!window->xdg_surface)
4135                 return;
4136
4137         if (window->fullscreen == fullscreen)
4138                 return;
4139
4140         if (fullscreen)
4141                 xdg_surface_set_fullscreen(window->xdg_surface, NULL);
4142         else
4143                 xdg_surface_unset_fullscreen(window->xdg_surface);
4144 }
4145
4146 int
4147 window_is_maximized(struct window *window)
4148 {
4149         return window->maximized;
4150 }
4151
4152 void
4153 window_set_maximized(struct window *window, int maximized)
4154 {
4155         if (!window->xdg_surface)
4156                 return;
4157
4158         if (window->maximized == maximized)
4159                 return;
4160
4161         if (maximized)
4162                 xdg_surface_set_maximized(window->xdg_surface);
4163         else
4164                 xdg_surface_unset_maximized(window->xdg_surface);
4165 }
4166
4167 int
4168 window_is_resizing(struct window *window)
4169 {
4170         return window->resizing;
4171 }
4172
4173 void
4174 window_set_minimized(struct window *window)
4175 {
4176         if (!window->xdg_surface)
4177                 return;
4178
4179         xdg_surface_set_minimized(window->xdg_surface);
4180 }
4181
4182 void
4183 window_set_user_data(struct window *window, void *data)
4184 {
4185         window->user_data = data;
4186 }
4187
4188 void *
4189 window_get_user_data(struct window *window)
4190 {
4191         return window->user_data;
4192 }
4193
4194 void
4195 window_set_key_handler(struct window *window,
4196                        window_key_handler_t handler)
4197 {
4198         window->key_handler = handler;
4199 }
4200
4201 void
4202 window_set_keyboard_focus_handler(struct window *window,
4203                                   window_keyboard_focus_handler_t handler)
4204 {
4205         window->keyboard_focus_handler = handler;
4206 }
4207
4208 void
4209 window_set_data_handler(struct window *window, window_data_handler_t handler)
4210 {
4211         window->data_handler = handler;
4212 }
4213
4214 void
4215 window_set_drop_handler(struct window *window, window_drop_handler_t handler)
4216 {
4217         window->drop_handler = handler;
4218 }
4219
4220 void
4221 window_set_close_handler(struct window *window,
4222                          window_close_handler_t handler)
4223 {
4224         window->close_handler = handler;
4225 }
4226
4227 void
4228 window_set_fullscreen_handler(struct window *window,
4229                               window_fullscreen_handler_t handler)
4230 {
4231         window->fullscreen_handler = handler;
4232 }
4233
4234 void
4235 window_set_output_handler(struct window *window,
4236                           window_output_handler_t handler)
4237 {
4238         window->output_handler = handler;
4239 }
4240
4241 void
4242 window_set_state_changed_handler(struct window *window,
4243                                  window_state_changed_handler_t handler)
4244 {
4245         window->state_changed_handler = handler;
4246 }
4247
4248 void
4249 window_set_title(struct window *window, const char *title)
4250 {
4251         free(window->title);
4252         window->title = strdup(title);
4253         if (window->frame) {
4254                 frame_set_title(window->frame->frame, title);
4255                 widget_schedule_redraw(window->frame->widget);
4256         }
4257         if (window->xdg_surface)
4258                 xdg_surface_set_title(window->xdg_surface, title);
4259 }
4260
4261 const char *
4262 window_get_title(struct window *window)
4263 {
4264         return window->title;
4265 }
4266
4267 void
4268 window_set_text_cursor_position(struct window *window, int32_t x, int32_t y)
4269 {
4270         struct text_cursor_position *text_cursor_position =
4271                                         window->display->text_cursor_position;
4272
4273         if (!text_cursor_position)
4274                 return;
4275
4276         text_cursor_position_notify(text_cursor_position,
4277                                     window->main_surface->surface,
4278                                     wl_fixed_from_int(x),
4279                                     wl_fixed_from_int(y));
4280 }
4281
4282 void
4283 window_damage(struct window *window, int32_t x, int32_t y,
4284               int32_t width, int32_t height)
4285 {
4286         wl_surface_damage(window->main_surface->surface, x, y, width, height);
4287 }
4288
4289 static void
4290 surface_enter(void *data,
4291               struct wl_surface *wl_surface, struct wl_output *wl_output)
4292 {
4293         struct window *window = data;
4294         struct output *output;
4295         struct output *output_found = NULL;
4296         struct window_output *window_output;
4297
4298         wl_list_for_each(output, &window->display->output_list, link) {
4299                 if (output->output == wl_output) {
4300                         output_found = output;
4301                         break;
4302                 }
4303         }
4304
4305         if (!output_found)
4306                 return;
4307
4308         window_output = xmalloc(sizeof *window_output);
4309         window_output->output = output_found;
4310
4311         wl_list_insert (&window->window_output_list, &window_output->link);
4312
4313         if (window->output_handler)
4314                 window->output_handler(window, output_found, 1,
4315                                        window->user_data);
4316 }
4317
4318 static void
4319 surface_leave(void *data,
4320               struct wl_surface *wl_surface, struct wl_output *output)
4321 {
4322         struct window *window = data;
4323         struct window_output *window_output;
4324         struct window_output *window_output_found = NULL;
4325
4326         wl_list_for_each(window_output, &window->window_output_list, link) {
4327                 if (window_output->output->output == output) {
4328                         window_output_found = window_output;
4329                         break;
4330                 }
4331         }
4332
4333         if (window_output_found) {
4334                 wl_list_remove(&window_output_found->link);
4335
4336                 if (window->output_handler)
4337                         window->output_handler(window, window_output->output,
4338                                                0, window->user_data);
4339
4340                 free(window_output_found);
4341         }
4342 }
4343
4344 static const struct wl_surface_listener surface_listener = {
4345         surface_enter,
4346         surface_leave
4347 };
4348
4349 static struct surface *
4350 surface_create(struct window *window)
4351 {
4352         struct display *display = window->display;
4353         struct surface *surface;
4354
4355         surface = xmalloc(sizeof *surface);
4356         memset(surface, 0, sizeof *surface);
4357         if (!surface)
4358                 return NULL;
4359
4360         surface->window = window;
4361         surface->surface = wl_compositor_create_surface(display->compositor);
4362         surface->buffer_scale = 1;
4363         wl_surface_add_listener(surface->surface, &surface_listener, window);
4364
4365         wl_list_insert(&window->subsurface_list, &surface->link);
4366
4367         return surface;
4368 }
4369
4370 static enum window_buffer_type
4371 get_preferred_buffer_type(struct display *display)
4372 {
4373 #ifdef HAVE_CAIRO_EGL
4374         if (display->argb_device && !getenv("TOYTOOLKIT_NO_EGL"))
4375                 return WINDOW_BUFFER_TYPE_EGL_WINDOW;
4376 #endif
4377
4378         return WINDOW_BUFFER_TYPE_SHM;
4379 }
4380
4381 static struct window *
4382 window_create_internal(struct display *display, int custom)
4383 {
4384         struct window *window;
4385         struct surface *surface;
4386
4387         window = xzalloc(sizeof *window);
4388         wl_list_init(&window->subsurface_list);
4389         window->display = display;
4390
4391         surface = surface_create(window);
4392         window->main_surface = surface;
4393
4394         assert(custom || display->xdg_shell);
4395
4396         window->custom = custom;
4397         window->preferred_format = WINDOW_PREFERRED_FORMAT_NONE;
4398
4399         surface->buffer_type = get_preferred_buffer_type(display);
4400
4401         wl_surface_set_user_data(surface->surface, window);
4402         wl_list_insert(display->window_list.prev, &window->link);
4403         wl_list_init(&window->redraw_task.link);
4404
4405         wl_list_init (&window->window_output_list);
4406
4407         return window;
4408 }
4409
4410 struct window *
4411 window_create(struct display *display)
4412 {
4413         struct window *window;
4414
4415         window = window_create_internal(display, 0);
4416
4417         window->xdg_surface =
4418                 xdg_shell_get_xdg_surface(window->display->xdg_shell,
4419                                           window->main_surface->surface);
4420         fail_on_null(window->xdg_surface);
4421
4422         xdg_surface_set_user_data(window->xdg_surface, window);
4423         xdg_surface_add_listener(window->xdg_surface,
4424                                  &xdg_surface_listener, window);
4425
4426         return window;
4427 }
4428
4429 struct window *
4430 window_create_custom(struct display *display)
4431 {
4432         return window_create_internal(display, 1);
4433 }
4434
4435 void
4436 window_set_parent(struct window *window,
4437                   struct window *parent_window)
4438 {
4439         window->parent = parent_window;
4440         window_sync_parent(window);
4441 }
4442
4443 struct window *
4444 window_get_parent(struct window *window)
4445 {
4446         return window->parent;
4447 }
4448
4449 static void
4450 menu_set_item(struct menu *menu, int sy)
4451 {
4452         int32_t x, y, width, height;
4453         int next;
4454
4455         frame_interior(menu->frame, &x, &y, &width, &height);
4456         next = (sy - y) / 20;
4457         if (menu->current != next) {
4458                 menu->current = next;
4459                 widget_schedule_redraw(menu->widget);
4460         }
4461 }
4462
4463 static int
4464 menu_motion_handler(struct widget *widget,
4465                     struct input *input, uint32_t time,
4466                     float x, float y, void *data)
4467 {
4468         struct menu *menu = data;
4469
4470         if (widget == menu->widget)
4471                 menu_set_item(data, y);
4472
4473         return CURSOR_LEFT_PTR;
4474 }
4475
4476 static int
4477 menu_enter_handler(struct widget *widget,
4478                    struct input *input, float x, float y, void *data)
4479 {
4480         struct menu *menu = data;
4481
4482         if (widget == menu->widget)
4483                 menu_set_item(data, y);
4484
4485         return CURSOR_LEFT_PTR;
4486 }
4487
4488 static void
4489 menu_leave_handler(struct widget *widget, struct input *input, void *data)
4490 {
4491         struct menu *menu = data;
4492
4493         if (widget == menu->widget)
4494                 menu_set_item(data, -200);
4495 }
4496
4497 static void
4498 menu_button_handler(struct widget *widget,
4499                     struct input *input, uint32_t time,
4500                     uint32_t button, enum wl_pointer_button_state state,
4501                     void *data)
4502
4503 {
4504         struct menu *menu = data;
4505
4506         if (state == WL_POINTER_BUTTON_STATE_RELEASED &&
4507             (menu->release_count > 0 || time - menu->time > 500)) {
4508                 /* Either relase after press-drag-release or
4509                  * click-motion-click. */
4510                 menu->func(menu->user_data, input, menu->current);
4511                 input_ungrab(input);
4512                 menu_destroy(menu);
4513         } else if (state == WL_POINTER_BUTTON_STATE_RELEASED) {
4514                 menu->release_count++;
4515         }
4516 }
4517
4518 static void
4519 menu_touch_up_handler(struct widget *widget,
4520                                           struct input *input,
4521                                           uint32_t serial,
4522                                           uint32_t time,
4523                                           int32_t id,
4524                                           void *data)
4525 {
4526         struct menu *menu = data;
4527
4528         input_ungrab(input);
4529         menu_destroy(menu);
4530 }
4531
4532 static void
4533 menu_redraw_handler(struct widget *widget, void *data)
4534 {
4535         cairo_t *cr;
4536         struct menu *menu = data;
4537         int32_t x, y, width, height, i;
4538
4539         cr = widget_cairo_create(widget);
4540
4541         frame_repaint(menu->frame, cr);
4542         frame_interior(menu->frame, &x, &y, &width, &height);
4543
4544         theme_set_background_source(menu->window->display->theme,
4545                                     cr, THEME_FRAME_ACTIVE);
4546         cairo_rectangle(cr, x, y, width, height);
4547         cairo_fill(cr);
4548
4549         cairo_select_font_face(cr, "sans",
4550                                CAIRO_FONT_SLANT_NORMAL,
4551                                CAIRO_FONT_WEIGHT_NORMAL);
4552         cairo_set_font_size(cr, 12);
4553
4554         for (i = 0; i < menu->count; i++) {
4555                 if (i == menu->current) {
4556                         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
4557                         cairo_rectangle(cr, x, y + i * 20, width, 20);
4558                         cairo_fill(cr);
4559                         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
4560                         cairo_move_to(cr, x + 10, y + i * 20 + 16);
4561                         cairo_show_text(cr, menu->entries[i]);
4562                 } else {
4563                         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
4564                         cairo_move_to(cr, x + 10, y + i * 20 + 16);
4565                         cairo_show_text(cr, menu->entries[i]);
4566                 }
4567         }
4568
4569         cairo_destroy(cr);
4570 }
4571
4572 static void
4573 handle_popup_popup_done(void *data, struct xdg_popup *xdg_popup, uint32_t serial)
4574 {
4575         struct window *window = data;
4576         struct menu *menu = window->main_surface->widget->user_data;
4577
4578         input_ungrab(menu->input);
4579         menu_destroy(menu);
4580 }
4581
4582 static const struct xdg_popup_listener xdg_popup_listener = {
4583         handle_popup_popup_done,
4584 };
4585
4586 void
4587 window_show_menu(struct display *display,
4588                  struct input *input, uint32_t time, struct window *parent,
4589                  int32_t x, int32_t y,
4590                  menu_func_t func, const char **entries, int count)
4591 {
4592         struct window *window;
4593         struct menu *menu;
4594         int32_t ix, iy;
4595
4596         menu = malloc(sizeof *menu);
4597         if (!menu)
4598                 return;
4599
4600         window = window_create_internal(parent->display, 0);
4601         if (!window) {
4602                 free(menu);
4603                 return;
4604         }
4605
4606         menu->window = window;
4607         menu->user_data = parent;
4608         menu->widget = window_add_widget(menu->window, menu);
4609         window_set_buffer_scale (menu->window, window_get_buffer_scale (parent));
4610         window_set_buffer_transform (menu->window, window_get_buffer_transform (parent));
4611         menu->frame = frame_create(window->display->theme, 0, 0,
4612                                    FRAME_BUTTON_NONE, NULL);
4613         fail_on_null(menu->frame);
4614         menu->entries = entries;
4615         menu->count = count;
4616         menu->release_count = 0;
4617         menu->current = -1;
4618         menu->time = time;
4619         menu->func = func;
4620         menu->input = input;
4621         window->x = x;
4622         window->y = y;
4623
4624         input_ungrab(input);
4625
4626         widget_set_redraw_handler(menu->widget, menu_redraw_handler);
4627         widget_set_enter_handler(menu->widget, menu_enter_handler);
4628         widget_set_leave_handler(menu->widget, menu_leave_handler);
4629         widget_set_motion_handler(menu->widget, menu_motion_handler);
4630         widget_set_button_handler(menu->widget, menu_button_handler);
4631         widget_set_touch_up_handler(menu->widget, menu_touch_up_handler);
4632
4633         input_grab(input, menu->widget, 0);
4634         frame_resize_inside(menu->frame, 200, count * 20);
4635         frame_set_flag(menu->frame, FRAME_FLAG_ACTIVE);
4636         window_schedule_resize(window, frame_width(menu->frame),
4637                                frame_height(menu->frame));
4638
4639         frame_interior(menu->frame, &ix, &iy, NULL, NULL);
4640
4641         window->xdg_popup = xdg_shell_get_xdg_popup(display->xdg_shell,
4642                                                     window->main_surface->surface,
4643                                                     parent->main_surface->surface,
4644                                                     input->seat,
4645                                                     display_get_serial(window->display),
4646                                                     window->x - ix,
4647                                                     window->y - iy,
4648                                                     0);
4649         fail_on_null(window->xdg_popup);
4650
4651         xdg_popup_set_user_data(window->xdg_popup, window);
4652         xdg_popup_add_listener(window->xdg_popup,
4653                                &xdg_popup_listener, window);
4654 }
4655
4656 void
4657 window_set_buffer_type(struct window *window, enum window_buffer_type type)
4658 {
4659         window->main_surface->buffer_type = type;
4660 }
4661
4662 enum window_buffer_type
4663 window_get_buffer_type(struct window *window)
4664 {
4665         return window->main_surface->buffer_type;
4666 }
4667
4668 void
4669 window_set_preferred_format(struct window *window,
4670                             enum preferred_format format)
4671 {
4672         window->preferred_format = format;
4673 }
4674
4675 struct widget *
4676 window_add_subsurface(struct window *window, void *data,
4677                       enum subsurface_mode default_mode)
4678 {
4679         struct widget *widget;
4680         struct surface *surface;
4681         struct wl_surface *parent;
4682         struct wl_subcompositor *subcompo = window->display->subcompositor;
4683
4684         surface = surface_create(window);
4685         surface->buffer_type = window_get_buffer_type(window);
4686         widget = widget_create(window, surface, data);
4687         wl_list_init(&widget->link);
4688         surface->widget = widget;
4689
4690         parent = window->main_surface->surface;
4691         surface->subsurface = wl_subcompositor_get_subsurface(subcompo,
4692                                                               surface->surface,
4693                                                               parent);
4694         surface->synchronized = 1;
4695
4696         switch (default_mode) {
4697         case SUBSURFACE_SYNCHRONIZED:
4698                 surface->synchronized_default = 1;
4699                 break;
4700         case SUBSURFACE_DESYNCHRONIZED:
4701                 surface->synchronized_default = 0;
4702                 break;
4703         default:
4704                 assert(!"bad enum subsurface_mode");
4705         }
4706
4707         window->resize_needed = 1;
4708         window_schedule_redraw(window);
4709
4710         return widget;
4711 }
4712
4713 static void
4714 display_handle_geometry(void *data,
4715                         struct wl_output *wl_output,
4716                         int x, int y,
4717                         int physical_width,
4718                         int physical_height,
4719                         int subpixel,
4720                         const char *make,
4721                         const char *model,
4722                         int transform)
4723 {
4724         struct output *output = data;
4725
4726         output->allocation.x = x;
4727         output->allocation.y = y;
4728         output->transform = transform;
4729
4730         if (output->make)
4731                 free(output->make);
4732         output->make = strdup(make);
4733
4734         if (output->model)
4735                 free(output->model);
4736         output->model = strdup(model);
4737 }
4738
4739 static void
4740 display_handle_done(void *data,
4741                      struct wl_output *wl_output)
4742 {
4743 }
4744
4745 static void
4746 display_handle_scale(void *data,
4747                      struct wl_output *wl_output,
4748                      int32_t scale)
4749 {
4750         struct output *output = data;
4751
4752         output->scale = scale;
4753 }
4754
4755 static void
4756 display_handle_mode(void *data,
4757                     struct wl_output *wl_output,
4758                     uint32_t flags,
4759                     int width,
4760                     int height,
4761                     int refresh)
4762 {
4763         struct output *output = data;
4764         struct display *display = output->display;
4765
4766         if (flags & WL_OUTPUT_MODE_CURRENT) {
4767                 output->allocation.width = width;
4768                 output->allocation.height = height;
4769                 if (display->output_configure_handler)
4770                         (*display->output_configure_handler)(
4771                                                 output, display->user_data);
4772         }
4773 }
4774
4775 static const struct wl_output_listener output_listener = {
4776         display_handle_geometry,
4777         display_handle_mode,
4778         display_handle_done,
4779         display_handle_scale
4780 };
4781
4782 static void
4783 display_add_output(struct display *d, uint32_t id)
4784 {
4785         struct output *output;
4786
4787         output = xzalloc(sizeof *output);
4788         output->display = d;
4789         output->scale = 1;
4790         output->output =
4791                 wl_registry_bind(d->registry, id, &wl_output_interface, 2);
4792         output->server_output_id = id;
4793         wl_list_insert(d->output_list.prev, &output->link);
4794
4795         wl_output_add_listener(output->output, &output_listener, output);
4796 }
4797
4798 static void
4799 output_destroy(struct output *output)
4800 {
4801         if (output->destroy_handler)
4802                 (*output->destroy_handler)(output, output->user_data);
4803
4804         wl_output_destroy(output->output);
4805         wl_list_remove(&output->link);
4806         free(output);
4807 }
4808
4809 static void
4810 display_destroy_output(struct display *d, uint32_t id)
4811 {
4812         struct output *output;
4813
4814         wl_list_for_each(output, &d->output_list, link) {
4815                 if (output->server_output_id == id) {
4816                         output_destroy(output);
4817                         break;
4818                 }
4819         }
4820 }
4821
4822 void
4823 display_set_global_handler(struct display *display,
4824                            display_global_handler_t handler)
4825 {
4826         struct global *global;
4827
4828         display->global_handler = handler;
4829         if (!handler)
4830                 return;
4831
4832         wl_list_for_each(global, &display->global_list, link)
4833                 display->global_handler(display,
4834                                         global->name, global->interface,
4835                                         global->version, display->user_data);
4836 }
4837
4838 void
4839 display_set_global_handler_remove(struct display *display,
4840                            display_global_handler_t remove_handler)
4841 {
4842         display->global_handler_remove = remove_handler;
4843         if (!remove_handler)
4844                 return;
4845 }
4846
4847 void
4848 display_set_output_configure_handler(struct display *display,
4849                                      display_output_handler_t handler)
4850 {
4851         struct output *output;
4852
4853         display->output_configure_handler = handler;
4854         if (!handler)
4855                 return;
4856
4857         wl_list_for_each(output, &display->output_list, link) {
4858                 if (output->allocation.width == 0 &&
4859                     output->allocation.height == 0)
4860                         continue;
4861
4862                 (*display->output_configure_handler)(output,
4863                                                      display->user_data);
4864         }
4865 }
4866
4867 void
4868 output_set_user_data(struct output *output, void *data)
4869 {
4870         output->user_data = data;
4871 }
4872
4873 void *
4874 output_get_user_data(struct output *output)
4875 {
4876         return output->user_data;
4877 }
4878
4879 void
4880 output_set_destroy_handler(struct output *output,
4881                            display_output_handler_t handler)
4882 {
4883         output->destroy_handler = handler;
4884         /* FIXME: implement this, once we have way to remove outputs */
4885 }
4886
4887 void
4888 output_get_allocation(struct output *output, struct rectangle *base)
4889 {
4890         struct rectangle allocation = output->allocation;
4891
4892         switch (output->transform) {
4893         case WL_OUTPUT_TRANSFORM_90:
4894         case WL_OUTPUT_TRANSFORM_270:
4895         case WL_OUTPUT_TRANSFORM_FLIPPED_90:
4896         case WL_OUTPUT_TRANSFORM_FLIPPED_270:
4897                 /* Swap width and height */
4898                 allocation.width = output->allocation.height;
4899                 allocation.height = output->allocation.width;
4900                 break;
4901         }
4902
4903         *base = allocation;
4904 }
4905
4906 struct wl_output *
4907 output_get_wl_output(struct output *output)
4908 {
4909         return output->output;
4910 }
4911
4912 enum wl_output_transform
4913 output_get_transform(struct output *output)
4914 {
4915         return output->transform;
4916 }
4917
4918 uint32_t
4919 output_get_scale(struct output *output)
4920 {
4921         return output->scale;
4922 }
4923
4924 const char *
4925 output_get_make(struct output *output)
4926 {
4927         return output->make;
4928 }
4929
4930 const char *
4931 output_get_model(struct output *output)
4932 {
4933         return output->model;
4934 }
4935
4936 static void
4937 fini_xkb(struct input *input)
4938 {
4939         xkb_state_unref(input->xkb.state);
4940         xkb_map_unref(input->xkb.keymap);
4941 }
4942
4943 #define MIN(a,b) ((a) < (b) ? a : b)
4944
4945 static void
4946 display_add_input(struct display *d, uint32_t id)
4947 {
4948         struct input *input;
4949
4950         input = xzalloc(sizeof *input);
4951         input->display = d;
4952         input->seat = wl_registry_bind(d->registry, id, &wl_seat_interface,
4953                                        MIN(d->seat_version, 3));
4954         input->touch_focus = NULL;
4955         input->pointer_focus = NULL;
4956         input->keyboard_focus = NULL;
4957         wl_list_init(&input->touch_point_list);
4958         wl_list_insert(d->input_list.prev, &input->link);
4959
4960         wl_seat_add_listener(input->seat, &seat_listener, input);
4961         wl_seat_set_user_data(input->seat, input);
4962
4963         if (d->data_device_manager) {
4964                 input->data_device =
4965                         wl_data_device_manager_get_data_device(d->data_device_manager,
4966                                                                input->seat);
4967                 wl_data_device_add_listener(input->data_device,
4968                                             &data_device_listener,
4969                                             input);
4970         }
4971
4972         input->pointer_surface = wl_compositor_create_surface(d->compositor);
4973
4974         input->repeat_timer_fd = timerfd_create(CLOCK_MONOTONIC,
4975                                                 TFD_CLOEXEC | TFD_NONBLOCK);
4976         input->repeat_task.run = keyboard_repeat_func;
4977         display_watch_fd(d, input->repeat_timer_fd,
4978                          EPOLLIN, &input->repeat_task);
4979 }
4980
4981 static void
4982 input_destroy(struct input *input)
4983 {
4984         input_remove_keyboard_focus(input);
4985         input_remove_pointer_focus(input);
4986
4987         if (input->drag_offer)
4988                 data_offer_destroy(input->drag_offer);
4989
4990         if (input->selection_offer)
4991                 data_offer_destroy(input->selection_offer);
4992
4993         if (input->data_device)
4994                 wl_data_device_destroy(input->data_device);
4995
4996         if (input->display->seat_version >= 3) {
4997                 if (input->pointer)
4998                         wl_pointer_release(input->pointer);
4999                 if (input->keyboard)
5000                         wl_keyboard_release(input->keyboard);
5001         }
5002
5003         fini_xkb(input);
5004
5005         wl_surface_destroy(input->pointer_surface);
5006
5007         wl_list_remove(&input->link);
5008         wl_seat_destroy(input->seat);
5009         close(input->repeat_timer_fd);
5010         free(input);
5011 }
5012
5013 static void
5014 init_workspace_manager(struct display *d, uint32_t id)
5015 {
5016         d->workspace_manager =
5017                 wl_registry_bind(d->registry, id,
5018                                  &workspace_manager_interface, 1);
5019         if (d->workspace_manager != NULL)
5020                 workspace_manager_add_listener(d->workspace_manager,
5021                                                &workspace_manager_listener,
5022                                                d);
5023 }
5024
5025 static void
5026 shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
5027 {
5028         struct display *d = data;
5029
5030         if (format == WL_SHM_FORMAT_RGB565)
5031                 d->has_rgb565 = 1;
5032 }
5033
5034 struct wl_shm_listener shm_listener = {
5035         shm_format
5036 };
5037
5038 static void
5039 xdg_shell_ping(void *data, struct xdg_shell *shell, uint32_t serial)
5040 {
5041         xdg_shell_pong(shell, serial);
5042 }
5043
5044 static const struct xdg_shell_listener xdg_shell_listener = {
5045         xdg_shell_ping,
5046 };
5047
5048 #define XDG_VERSION 3 /* The version of xdg-shell that we implement */
5049 #ifdef static_assert
5050 static_assert(XDG_VERSION == XDG_SHELL_VERSION_CURRENT,
5051               "Interface version doesn't match implementation version");
5052 #endif
5053
5054 static void
5055 registry_handle_global(void *data, struct wl_registry *registry, uint32_t id,
5056                        const char *interface, uint32_t version)
5057 {
5058         struct display *d = data;
5059         struct global *global;
5060
5061         global = xmalloc(sizeof *global);
5062         global->name = id;
5063         global->interface = strdup(interface);
5064         global->version = version;
5065         wl_list_insert(d->global_list.prev, &global->link);
5066
5067         if (strcmp(interface, "wl_compositor") == 0) {
5068                 d->compositor = wl_registry_bind(registry, id,
5069                                                  &wl_compositor_interface, 3);
5070         } else if (strcmp(interface, "wl_output") == 0) {
5071                 display_add_output(d, id);
5072         } else if (strcmp(interface, "wl_seat") == 0) {
5073                 d->seat_version = version;
5074                 display_add_input(d, id);
5075         } else if (strcmp(interface, "wl_shm") == 0) {
5076                 d->shm = wl_registry_bind(registry, id, &wl_shm_interface, 1);
5077                 wl_shm_add_listener(d->shm, &shm_listener, d);
5078         } else if (strcmp(interface, "wl_data_device_manager") == 0) {
5079                 d->data_device_manager =
5080                         wl_registry_bind(registry, id,
5081                                          &wl_data_device_manager_interface, 1);
5082         } else if (strcmp(interface, "xdg_shell") == 0) {
5083                 d->xdg_shell = wl_registry_bind(registry, id,
5084                                                 &xdg_shell_interface, 1);
5085                 xdg_shell_use_unstable_version(d->xdg_shell, XDG_VERSION);
5086                 xdg_shell_add_listener(d->xdg_shell, &xdg_shell_listener, d);
5087         } else if (strcmp(interface, "text_cursor_position") == 0) {
5088                 d->text_cursor_position =
5089                         wl_registry_bind(registry, id,
5090                                          &text_cursor_position_interface, 1);
5091         } else if (strcmp(interface, "workspace_manager") == 0) {
5092                 init_workspace_manager(d, id);
5093         } else if (strcmp(interface, "wl_subcompositor") == 0) {
5094                 d->subcompositor =
5095                         wl_registry_bind(registry, id,
5096                                          &wl_subcompositor_interface, 1);
5097         }
5098
5099         if (d->global_handler)
5100                 d->global_handler(d, id, interface, version, d->user_data);
5101 }
5102
5103 static void
5104 registry_handle_global_remove(void *data, struct wl_registry *registry,
5105                               uint32_t name)
5106 {
5107         struct display *d = data;
5108         struct global *global;
5109         struct global *tmp;
5110
5111         wl_list_for_each_safe(global, tmp, &d->global_list, link) {
5112                 if (global->name != name)
5113                         continue;
5114
5115                 if (strcmp(global->interface, "wl_output") == 0)
5116                         display_destroy_output(d, name);
5117
5118                 /* XXX: Should destroy remaining bound globals */
5119
5120                 if (d->global_handler_remove)
5121                         d->global_handler_remove(d, name, global->interface,
5122                                         global->version, d->user_data);
5123
5124                 wl_list_remove(&global->link);
5125                 free(global->interface);
5126                 free(global);
5127         }
5128 }
5129
5130 void *
5131 display_bind(struct display *display, uint32_t name,
5132              const struct wl_interface *interface, uint32_t version)
5133 {
5134         return wl_registry_bind(display->registry, name, interface, version);
5135 }
5136
5137 static const struct wl_registry_listener registry_listener = {
5138         registry_handle_global,
5139         registry_handle_global_remove
5140 };
5141
5142 #ifdef HAVE_CAIRO_EGL
5143 static int
5144 init_egl(struct display *d)
5145 {
5146         EGLint major, minor;
5147         EGLint n;
5148
5149 #ifdef USE_CAIRO_GLESV2
5150 #  define GL_BIT EGL_OPENGL_ES2_BIT
5151 #else
5152 #  define GL_BIT EGL_OPENGL_BIT
5153 #endif
5154
5155         static const EGLint argb_cfg_attribs[] = {
5156                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
5157                 EGL_RED_SIZE, 1,
5158                 EGL_GREEN_SIZE, 1,
5159                 EGL_BLUE_SIZE, 1,
5160                 EGL_ALPHA_SIZE, 1,
5161                 EGL_DEPTH_SIZE, 1,
5162                 EGL_RENDERABLE_TYPE, GL_BIT,
5163                 EGL_NONE
5164         };
5165
5166 #ifdef USE_CAIRO_GLESV2
5167         static const EGLint context_attribs[] = {
5168                 EGL_CONTEXT_CLIENT_VERSION, 2,
5169                 EGL_NONE
5170         };
5171         EGLint api = EGL_OPENGL_ES_API;
5172 #else
5173         EGLint *context_attribs = NULL;
5174         EGLint api = EGL_OPENGL_API;
5175 #endif
5176
5177         d->dpy = eglGetDisplay(d->display);
5178         if (!eglInitialize(d->dpy, &major, &minor)) {
5179                 fprintf(stderr, "failed to initialize EGL\n");
5180                 return -1;
5181         }
5182
5183         if (!eglBindAPI(api)) {
5184                 fprintf(stderr, "failed to bind EGL client API\n");
5185                 return -1;
5186         }
5187
5188         if (!eglChooseConfig(d->dpy, argb_cfg_attribs,
5189                              &d->argb_config, 1, &n) || n != 1) {
5190                 fprintf(stderr, "failed to choose argb EGL config\n");
5191                 return -1;
5192         }
5193
5194         d->argb_ctx = eglCreateContext(d->dpy, d->argb_config,
5195                                        EGL_NO_CONTEXT, context_attribs);
5196         if (d->argb_ctx == NULL) {
5197                 fprintf(stderr, "failed to create EGL context\n");
5198                 return -1;
5199         }
5200
5201         d->argb_device = cairo_egl_device_create(d->dpy, d->argb_ctx);
5202         if (cairo_device_status(d->argb_device) != CAIRO_STATUS_SUCCESS) {
5203                 fprintf(stderr, "failed to get cairo EGL argb device\n");
5204                 return -1;
5205         }
5206
5207         return 0;
5208 }
5209
5210 static void
5211 fini_egl(struct display *display)
5212 {
5213         cairo_device_destroy(display->argb_device);
5214
5215         eglMakeCurrent(display->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
5216                        EGL_NO_CONTEXT);
5217
5218         eglTerminate(display->dpy);
5219         eglReleaseThread();
5220 }
5221 #endif
5222
5223 static void
5224 init_dummy_surface(struct display *display)
5225 {
5226         int len;
5227         void *data;
5228
5229         len = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, 1);
5230         data = malloc(len);
5231         display->dummy_surface =
5232                 cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32,
5233                                                     1, 1, len);
5234         display->dummy_surface_data = data;
5235 }
5236
5237 static void
5238 handle_display_data(struct task *task, uint32_t events)
5239 {
5240         struct display *display =
5241                 container_of(task, struct display, display_task);
5242         struct epoll_event ep;
5243         int ret;
5244
5245         display->display_fd_events = events;
5246
5247         if (events & EPOLLERR || events & EPOLLHUP) {
5248                 display_exit(display);
5249                 return;
5250         }
5251
5252         if (events & EPOLLIN) {
5253                 ret = wl_display_dispatch(display->display);
5254                 if (ret == -1) {
5255                         display_exit(display);
5256                         return;
5257                 }
5258         }
5259
5260         if (events & EPOLLOUT) {
5261                 ret = wl_display_flush(display->display);
5262                 if (ret == 0) {
5263                         ep.events = EPOLLIN | EPOLLERR | EPOLLHUP;
5264                         ep.data.ptr = &display->display_task;
5265                         epoll_ctl(display->epoll_fd, EPOLL_CTL_MOD,
5266                                   display->display_fd, &ep);
5267                 } else if (ret == -1 && errno != EAGAIN) {
5268                         display_exit(display);
5269                         return;
5270                 }
5271         }
5272 }
5273
5274 static void
5275 log_handler(const char *format, va_list args)
5276 {
5277         vfprintf(stderr, format, args);
5278 }
5279
5280 struct display *
5281 display_create(int *argc, char *argv[])
5282 {
5283         struct display *d;
5284
5285         wl_log_set_handler_client(log_handler);
5286
5287         d = zalloc(sizeof *d);
5288         if (d == NULL)
5289                 return NULL;
5290
5291         d->display = wl_display_connect(NULL);
5292         if (d->display == NULL) {
5293                 fprintf(stderr, "failed to connect to Wayland display: %m\n");
5294                 free(d);
5295                 return NULL;
5296         }
5297
5298         d->xkb_context = xkb_context_new(0);
5299         if (d->xkb_context == NULL) {
5300                 fprintf(stderr, "Failed to create XKB context\n");
5301                 free(d);
5302                 return NULL;
5303         }
5304
5305         d->epoll_fd = os_epoll_create_cloexec();
5306         d->display_fd = wl_display_get_fd(d->display);
5307         d->display_task.run = handle_display_data;
5308         display_watch_fd(d, d->display_fd, EPOLLIN | EPOLLERR | EPOLLHUP,
5309                          &d->display_task);
5310
5311         wl_list_init(&d->deferred_list);
5312         wl_list_init(&d->input_list);
5313         wl_list_init(&d->output_list);
5314         wl_list_init(&d->global_list);
5315
5316         d->workspace = 0;
5317         d->workspace_count = 1;
5318
5319         d->registry = wl_display_get_registry(d->display);
5320         wl_registry_add_listener(d->registry, &registry_listener, d);
5321
5322         if (wl_display_dispatch(d->display) < 0) {
5323                 fprintf(stderr, "Failed to process Wayland connection: %m\n");
5324                 return NULL;
5325         }
5326
5327 #ifdef HAVE_CAIRO_EGL
5328         if (init_egl(d) < 0)
5329                 fprintf(stderr, "EGL does not seem to work, "
5330                         "falling back to software rendering and wl_shm.\n");
5331 #endif
5332
5333         create_cursors(d);
5334
5335         d->theme = theme_create();
5336
5337         wl_list_init(&d->window_list);
5338
5339         init_dummy_surface(d);
5340
5341         return d;
5342 }
5343
5344 static void
5345 display_destroy_outputs(struct display *display)
5346 {
5347         struct output *tmp;
5348         struct output *output;
5349
5350         wl_list_for_each_safe(output, tmp, &display->output_list, link)
5351                 output_destroy(output);
5352 }
5353
5354 static void
5355 display_destroy_inputs(struct display *display)
5356 {
5357         struct input *tmp;
5358         struct input *input;
5359
5360         wl_list_for_each_safe(input, tmp, &display->input_list, link)
5361                 input_destroy(input);
5362 }
5363
5364 void
5365 display_destroy(struct display *display)
5366 {
5367         if (!wl_list_empty(&display->window_list))
5368                 fprintf(stderr, "toytoolkit warning: %d windows exist.\n",
5369                         wl_list_length(&display->window_list));
5370
5371         if (!wl_list_empty(&display->deferred_list))
5372                 fprintf(stderr, "toytoolkit warning: deferred tasks exist.\n");
5373
5374         cairo_surface_destroy(display->dummy_surface);
5375         free(display->dummy_surface_data);
5376
5377         display_destroy_outputs(display);
5378         display_destroy_inputs(display);
5379
5380         xkb_context_unref(display->xkb_context);
5381
5382         theme_destroy(display->theme);
5383         destroy_cursors(display);
5384
5385 #ifdef HAVE_CAIRO_EGL
5386         if (display->argb_device)
5387                 fini_egl(display);
5388 #endif
5389
5390         if (display->subcompositor)
5391                 wl_subcompositor_destroy(display->subcompositor);
5392
5393         if (display->xdg_shell)
5394                 xdg_shell_destroy(display->xdg_shell);
5395
5396         if (display->shm)
5397                 wl_shm_destroy(display->shm);
5398
5399         if (display->data_device_manager)
5400                 wl_data_device_manager_destroy(display->data_device_manager);
5401
5402         wl_compositor_destroy(display->compositor);
5403         wl_registry_destroy(display->registry);
5404
5405         close(display->epoll_fd);
5406
5407         if (!(display->display_fd_events & EPOLLERR) &&
5408             !(display->display_fd_events & EPOLLHUP))
5409                 wl_display_flush(display->display);
5410
5411         wl_display_disconnect(display->display);
5412         free(display);
5413 }
5414
5415 void
5416 display_set_user_data(struct display *display, void *data)
5417 {
5418         display->user_data = data;
5419 }
5420
5421 void *
5422 display_get_user_data(struct display *display)
5423 {
5424         return display->user_data;
5425 }
5426
5427 struct wl_display *
5428 display_get_display(struct display *display)
5429 {
5430         return display->display;
5431 }
5432
5433 int
5434 display_has_subcompositor(struct display *display)
5435 {
5436         if (display->subcompositor)
5437                 return 1;
5438
5439         wl_display_roundtrip(display->display);
5440
5441         return display->subcompositor != NULL;
5442 }
5443
5444 cairo_device_t *
5445 display_get_cairo_device(struct display *display)
5446 {
5447         return display->argb_device;
5448 }
5449
5450 struct output *
5451 display_get_output(struct display *display)
5452 {
5453         return container_of(display->output_list.next, struct output, link);
5454 }
5455
5456 struct wl_compositor *
5457 display_get_compositor(struct display *display)
5458 {
5459         return display->compositor;
5460 }
5461
5462 uint32_t
5463 display_get_serial(struct display *display)
5464 {
5465         return display->serial;
5466 }
5467
5468 EGLDisplay
5469 display_get_egl_display(struct display *d)
5470 {
5471         return d->dpy;
5472 }
5473
5474 struct wl_data_source *
5475 display_create_data_source(struct display *display)
5476 {
5477         if (display->data_device_manager)
5478                 return wl_data_device_manager_create_data_source(display->data_device_manager);
5479         else
5480                 return NULL;
5481 }
5482
5483 EGLConfig
5484 display_get_argb_egl_config(struct display *d)
5485 {
5486         return d->argb_config;
5487 }
5488
5489 int
5490 display_acquire_window_surface(struct display *display,
5491                                struct window *window,
5492                                EGLContext ctx)
5493 {
5494         struct surface *surface = window->main_surface;
5495
5496         if (surface->buffer_type != WINDOW_BUFFER_TYPE_EGL_WINDOW)
5497                 return -1;
5498
5499         widget_get_cairo_surface(window->main_surface->widget);
5500         return surface->toysurface->acquire(surface->toysurface, ctx);
5501 }
5502
5503 void
5504 display_release_window_surface(struct display *display,
5505                                struct window *window)
5506 {
5507         struct surface *surface = window->main_surface;
5508
5509         if (surface->buffer_type != WINDOW_BUFFER_TYPE_EGL_WINDOW)
5510                 return;
5511
5512         surface->toysurface->release(surface->toysurface);
5513 }
5514
5515 void
5516 display_defer(struct display *display, struct task *task)
5517 {
5518         wl_list_insert(&display->deferred_list, &task->link);
5519 }
5520
5521 void
5522 display_watch_fd(struct display *display,
5523                  int fd, uint32_t events, struct task *task)
5524 {
5525         struct epoll_event ep;
5526
5527         ep.events = events;
5528         ep.data.ptr = task;
5529         epoll_ctl(display->epoll_fd, EPOLL_CTL_ADD, fd, &ep);
5530 }
5531
5532 void
5533 display_unwatch_fd(struct display *display, int fd)
5534 {
5535         epoll_ctl(display->epoll_fd, EPOLL_CTL_DEL, fd, NULL);
5536 }
5537
5538 void
5539 display_run(struct display *display)
5540 {
5541         struct task *task;
5542         struct epoll_event ep[16];
5543         int i, count, ret;
5544
5545         display->running = 1;
5546         while (1) {
5547                 while (!wl_list_empty(&display->deferred_list)) {
5548                         task = container_of(display->deferred_list.prev,
5549                                             struct task, link);
5550                         wl_list_remove(&task->link);
5551                         task->run(task, 0);
5552                 }
5553
5554                 wl_display_dispatch_pending(display->display);
5555
5556                 if (!display->running)
5557                         break;
5558
5559                 ret = wl_display_flush(display->display);
5560                 if (ret < 0 && errno == EAGAIN) {
5561                         ep[0].events =
5562                                 EPOLLIN | EPOLLOUT | EPOLLERR | EPOLLHUP;
5563                         ep[0].data.ptr = &display->display_task;
5564
5565                         epoll_ctl(display->epoll_fd, EPOLL_CTL_MOD,
5566                                   display->display_fd, &ep[0]);
5567                 } else if (ret < 0) {
5568                         break;
5569                 }
5570
5571                 count = epoll_wait(display->epoll_fd,
5572                                    ep, ARRAY_LENGTH(ep), -1);
5573                 for (i = 0; i < count; i++) {
5574                         task = ep[i].data.ptr;
5575                         task->run(task, ep[i].events);
5576                 }
5577         }
5578 }
5579
5580 void
5581 display_exit(struct display *display)
5582 {
5583         display->running = 0;
5584 }
5585
5586 void
5587 keysym_modifiers_add(struct wl_array *modifiers_map,
5588                      const char *name)
5589 {
5590         size_t len = strlen(name) + 1;
5591         char *p;
5592
5593         p = wl_array_add(modifiers_map, len);
5594
5595         if (p == NULL)
5596                 return;
5597
5598         strncpy(p, name, len);
5599 }
5600
5601 static xkb_mod_index_t
5602 keysym_modifiers_get_index(struct wl_array *modifiers_map,
5603                            const char *name)
5604 {
5605         xkb_mod_index_t index = 0;
5606         char *p = modifiers_map->data;
5607
5608         while ((const char *)p < (const char *)(modifiers_map->data + modifiers_map->size)) {
5609                 if (strcmp(p, name) == 0)
5610                         return index;
5611
5612                 index++;
5613                 p += strlen(p) + 1;
5614         }
5615
5616         return XKB_MOD_INVALID;
5617 }
5618
5619 xkb_mod_mask_t
5620 keysym_modifiers_get_mask(struct wl_array *modifiers_map,
5621                           const char *name)
5622 {
5623         xkb_mod_index_t index = keysym_modifiers_get_index(modifiers_map, name);
5624
5625         if (index == XKB_MOD_INVALID)
5626                 return XKB_MOD_INVALID;
5627
5628         return 1 << index;
5629 }
5630
5631 void *
5632 fail_on_null(void *p)
5633 {
5634         if (p == NULL) {
5635                 fprintf(stderr, "%s: out of memory\n", program_invocation_short_name);
5636                 exit(EXIT_FAILURE);
5637         }
5638
5639         return p;
5640 }
5641
5642 void *
5643 xmalloc(size_t s)
5644 {
5645         return fail_on_null(malloc(s));
5646 }
5647
5648 void *
5649 xzalloc(size_t s)
5650 {
5651         return fail_on_null(zalloc(s));
5652 }
5653
5654 char *
5655 xstrdup(const char *s)
5656 {
5657         return fail_on_null(strdup(s));
5658 }
5659
5660 void *
5661 xrealloc(char *p, size_t s)
5662 {
5663         return fail_on_null(realloc(p, s));
5664 }