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