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