src/wlt_toolkit.c

   1 /*
   2  * wlt - Toolkit Helper
   3  *
   4  * Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files
   8  * (the "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  21  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * Wayland Terminal toolkit helpers
  28  */
  29
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <sys/mman.h>
  35 #include <unistd.h>
  36 #include <wayland-client.h>
  37 #include <wayland-cursor.h>
  38 #include <xkbcommon/xkbcommon.h>
  39 #include "eloop.h"
  40 #include "log.h"
  41 #include "shl_dlist.h"
  42 #include "shl_hook.h"
  43 #include "shl_misc.h"
  44 #include "tsm_vte.h"
  45 #include "wlt_toolkit.h"
  46
  47 #define LOG_SUBSYSTEM "wlt_toolkit"
  48
  49 struct wlt_pool {
  50         struct wl_shm_pool *w_pool;
  51         size_t size;
  52         uint8_t *data;
  53 };
  54
  55 enum {
  56         STATE_INIT = 0,
  57         STATE_RUNNING,
  58         STATE_HUP,
  59 };
  60
  61 struct wlt_display {
  62         unsigned long ref;
  63         struct ev_eloop *eloop;
  64         struct wl_display *dp;
  65         struct ev_fd *dp_fd;
  66         struct wl_global_listener *dp_listener;
  67         struct shl_hook *listeners;
  68         unsigned int state;
  69
  70         struct shl_dlist window_list;
  71
  72         struct wl_compositor *w_comp;
  73         struct wl_seat *w_seat;
  74         struct wl_shell *w_shell;
  75         struct wl_shm *w_shm;
  76
  77         uint32_t last_serial;
  78         uint32_t pointer_enter_serial;
  79         struct wl_pointer *w_pointer;
  80         struct wlt_window *pointer_focus;
  81
  82         uint32_t cursor_serial;
  83         unsigned int current_cursor;
  84         struct wl_surface *w_cursor_surface;
  85         struct wl_cursor_theme *cursor_theme;
  86         struct wl_cursor *cursors[WLT_CURSOR_NUM];
  87
  88         struct wl_keyboard *w_keyboard;
  89         struct xkb_context *xkb_ctx;
  90         struct xkb_keymap *xkb_keymap;
  91         struct xkb_state *xkb_state;
  92         struct wlt_window *keyboard_focus;
  93         struct ev_timer *repeat_timer;
  94         uint32_t repeat_sym;
  95 };
  96
  97 struct wlt_window {
  98         unsigned long ref;
  99         struct shl_dlist list;
 100         void *data;
 101         wlt_window_close_cb close_cb;
 102         bool close_pending;
 103         struct wlt_display *disp;
 104         struct wlt_pool *pool;
 105
 106         struct wl_surface *w_surface;
 107         struct wl_shell_surface *w_shell_surface;
 108         struct wl_buffer *w_buffer;
 109
 110         bool buffer_attached;
 111         bool skip_damage;
 112         bool need_resize;
 113         bool need_redraw;
 114         bool need_frame;
 115         bool idle_pending;
 116         unsigned int new_width;
 117         unsigned int new_height;
 118         unsigned int saved_width;
 119         unsigned int saved_height;
 120         unsigned int resize_edges;
 121         bool maximized;
 122         bool fullscreen;
 123         struct wlt_shm_buffer buffer;
 124         struct wl_callback *w_frame;
 125
 126         struct shl_dlist widget_list;
 127 };
 128
 129 struct wlt_widget {
 130         struct shl_dlist list;
 131         struct wlt_window *wnd;
 132         void *data;
 133         wlt_widget_redraw_cb redraw_cb;
 134         wlt_widget_destroy_cb destroy_cb;
 135         wlt_widget_prepare_resize_cb prepare_resize_cb;
 136         wlt_widget_resize_cb resize_cb;
 137         wlt_widget_pointer_enter_cb pointer_enter_cb;
 138         wlt_widget_pointer_leave_cb pointer_leave_cb;
 139         wlt_widget_pointer_motion_cb pointer_motion_cb;
 140         wlt_widget_pointer_button_cb pointer_button_cb;
 141         wlt_widget_keyboard_cb keyboard_cb;
 142 };
 143
 144 static int wlt_pool_new(struct wlt_pool **out, struct wlt_display *disp,
 145                         size_t size)
 146 {
 147         static const char template[] = "/wlterm-shared-XXXXXX";
 148         struct wlt_pool *pool;
 149         int fd, ret;
 150         const char *path;
 151         char *name;
 152
 153         path = getenv("XDG_RUNTIME_DIR");
 154         if (!path) {
 155                 log_error("XDG_RUNTIME_DIR not set");
 156                 return -EFAULT;
 157         }
 158
 159         pool = malloc(sizeof(*pool));
 160         if (!pool)
 161                 return -ENOMEM;
 162         memset(pool, 0, sizeof(*pool));
 163         pool->size = size;
 164
 165         name = malloc(strlen(path) + sizeof(template));
 166         if (!name) {
 167                 ret = -ENOMEM;
 168                 goto err_free;
 169         }
 170         strcpy(name, path);
 171         strcat(name, template);
 172
 173         fd = mkostemp(name, O_CLOEXEC);
 174         if (fd < 0) {
 175                 log_error("cannot create temporary file %s via mkostemp() (%d): %m",
 176                           name, errno);
 177                 ret = -EFAULT;
 178                 free(name);
 179                 goto err_free;
 180         }
 181
 182         ret = unlink(name);
 183         if (ret)
 184                 log_warning("cannot unlink temporary file %s (%d): %m",
 185                             name, errno);
 186         free(name);
 187
 188         ret = ftruncate(fd, size);
 189         if (ret) {
 190                 log_error("cannot truncate temporary file to length %lu (%d): %m",
 191                           size, errno);
 192                 ret = -EFAULT;
 193                 goto err_close;
 194         }
 195
 196         pool->data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
 197                           fd, 0);
 198         if (pool->data == MAP_FAILED) {
 199                 log_error("cannot mmap temporary file (%d): %m", errno);
 200                 ret = -EFAULT;
 201                 goto err_close;
 202         }
 203
 204         pool->w_pool = wl_shm_create_pool(disp->w_shm, fd, size);
 205         if (!pool->w_pool) {
 206                 log_error("cannot create wayland shm pool object");
 207                 ret = -EFAULT;
 208                 goto err_map;
 209         }
 210
 211         close(fd);
 212         *out = pool;
 213         return 0;
 214
 215 err_map:
 216         munmap(pool->data, size);
 217 err_close:
 218         close(fd);
 219 err_free:
 220         free(pool);
 221         return ret;
 222 }
 223
 224 static void wlt_pool_free(struct wlt_pool *pool)
 225 {
 226         munmap(pool->data, pool->size);
 227         wl_shm_pool_destroy(pool->w_pool);
 228         free(pool);
 229 }
 230
 231 /*
 232  * These cursor-names are based on:
 233  *   https://bugs.kde.org/attachment.cgi?id=67313
 234  */
 235
 236 static char *(*cursors[])[] = {
 237         [WLT_CURSOR_NONE] = &(char*[]) {
 238                 NULL,
 239         },
 240         [WLT_CURSOR_TOP] = &(char*[]) {
 241                 "top_side",
 242                 "n-resize",
 243                 NULL,
 244         },
 245         [WLT_CURSOR_BOTTOM] = &(char*[]) {
 246                 "bottom_side",
 247                 "s-resize",
 248                 NULL,
 249         },
 250         [WLT_CURSOR_LEFT] = &(char*[]) {
 251                 "left_side",
 252                 "w-resize",
 253                 NULL,
 254         },
 255         [WLT_CURSOR_RIGHT] = &(char*[]) {
 256                 "right_side",
 257                 "e-resize",
 258                 NULL,
 259         },
 260         [WLT_CURSOR_TOP_LEFT] = &(char*[]) {
 261                 "top_left_corner",
 262                 "nw-resize",
 263                 NULL,
 264         },
 265         [WLT_CURSOR_TOP_RIGHT] = &(char*[]) {
 266                 "top_right_corner",
 267                 "ne-resize",
 268                 NULL,
 269         },
 270         [WLT_CURSOR_BOTTOM_LEFT] = &(char*[]) {
 271                 "bottom_left_corner",
 272                 "sw-resize",
 273                 NULL,
 274         },
 275         [WLT_CURSOR_BOTTOM_RIGHT] = &(char*[]) {
 276                 "bottom_right_corner",
 277                 "se-resize",
 278                 NULL,
 279         },
 280         [WLT_CURSOR_DRAGGING] = &(char*[]) {
 281                 "grabbing",
 282                 "closedhand",
 283                 "208530c400c041818281048008011002",
 284                 NULL,
 285         },
 286         [WLT_CURSOR_LEFT_PTR] = &(char*[]) {
 287                 "left_ptr",
 288                 "default",
 289                 "top_left_arrow",
 290                 "left-arrow",
 291                 NULL,
 292         },
 293         [WLT_CURSOR_IBEAM] = &(char*[]) {
 294                 "xterm",
 295                 "ibeam",
 296                 "text",
 297                 NULL,
 298         },
 299 };
 300
 301 static int load_cursors(struct wlt_display *disp)
 302 {
 303         unsigned int i, j;
 304         size_t size = sizeof(cursors) / sizeof(*cursors);
 305         struct wl_cursor *cursor;
 306
 307         disp->w_cursor_surface = wl_compositor_create_surface(disp->w_comp);
 308
 309         disp->cursor_theme = wl_cursor_theme_load(NULL, 32, disp->w_shm);
 310         if (!disp->cursor_theme) {
 311                 log_warning("cannot load curdor theme");
 312                 return -EFAULT;
 313         }
 314
 315         for (i = 0; i < WLT_CURSOR_NUM; ++i) {
 316                 cursor = NULL;
 317                 if (i < size && cursors[i]) {
 318                         for (j = 0; (*cursors[i])[j]; ++j) {
 319                                 cursor = wl_cursor_theme_get_cursor(
 320                                                         disp->cursor_theme,
 321                                                         (*cursors[i])[j]);
 322                                 if (cursor)
 323                                         break;
 324                         }
 325                 }
 326
 327                 if (!cursor && i != WLT_CURSOR_NONE)
 328                         log_warning("cannot load cursor for ID %d", i);
 329
 330                 disp->cursors[i] = cursor;
 331         }
 332
 333         return 0;
 334 }
 335
 336 static void unload_cursors(struct wlt_display *disp)
 337 {
 338         if (disp->cursor_theme)
 339                 wl_cursor_theme_destroy(disp->cursor_theme);
 340         if (disp->w_cursor_surface)
 341                 wl_surface_destroy(disp->w_cursor_surface);
 342 }
 343
 344 static void set_cursor(struct wlt_display *disp, unsigned int cursor)
 345 {
 346         bool force = false;
 347         struct wl_cursor *cur;
 348         struct wl_cursor_image *image;
 349         struct wl_buffer *buffer;
 350
 351         if (cursor >= WLT_CURSOR_NUM)
 352                 cursor = WLT_CURSOR_LEFT_PTR;
 353
 354         if (disp->pointer_enter_serial > disp->cursor_serial)
 355                 force = true;
 356
 357         if (!force && cursor == disp->current_cursor)
 358                 return;
 359
 360         disp->current_cursor = cursor;
 361         disp->cursor_serial = disp->pointer_enter_serial;
 362
 363         cur = disp->cursors[cursor];
 364         if (!cur) {
 365                 wl_pointer_set_cursor(disp->w_pointer,
 366                                       disp->pointer_enter_serial,
 367                                       NULL, 0, 0);
 368                 return;
 369         }
 370
 371         image = cur->images[0];
 372         buffer = wl_cursor_image_get_buffer(image);
 373         if (!buffer) {
 374                 log_error("cannot load buffer for cursor image");
 375                 return;
 376         }
 377
 378         wl_pointer_set_cursor(disp->w_pointer,
 379                               disp->pointer_enter_serial,
 380                               disp->w_cursor_surface,
 381                               image->hotspot_x, image->hotspot_y);
 382         wl_surface_attach(disp->w_cursor_surface, buffer, 0, 0);
 383         wl_surface_damage(disp->w_cursor_surface, 0, 0,
 384                           image->width, image->height);
 385 }
 386
 387 static int dp_mask_update(uint32_t mask, void *data)
 388 {
 389         struct wlt_display *disp = data;
 390         int ret;
 391         int mode;
 392
 393         if (!disp->dp_fd)
 394                 return 0;
 395
 396         mode = 0;
 397         if (mask & WL_DISPLAY_READABLE)
 398                 mode |= EV_READABLE;
 399         if (mask & WL_DISPLAY_WRITABLE)
 400                 mode |= EV_WRITEABLE;
 401
 402         ret = ev_fd_update(disp->dp_fd, mode);
 403         if (ret)
 404                 log_warning("cannot update wayland-fd event-polling modes (%d)",
 405                             ret);
 406
 407         return 0;
 408 }
 409
 410 static void dp_event(struct ev_fd *fd, int mask, void *data)
 411 {
 412         struct wlt_display *disp = data;
 413         int mode;
 414
 415         if (mask & (EV_HUP | EV_ERR)) {
 416                 log_warning("HUP/ERR on wayland socket");
 417                 disp->state = STATE_HUP;
 418                 shl_hook_call(disp->listeners, disp, (void*)WLT_DISPLAY_HUP);
 419                 ev_eloop_rm_fd(disp->dp_fd);
 420                 disp->dp_fd = NULL;
 421                 return;
 422         }
 423
 424         mode = 0;
 425         if (mask & EV_READABLE)
 426                 mode |= WL_DISPLAY_READABLE;
 427         if (mask & EV_WRITEABLE)
 428                 mode |= WL_DISPLAY_WRITABLE;
 429
 430         if (mode)
 431                 wl_display_iterate(disp->dp, mode);
 432 }
 433
 434 static void pointer_enter(void *data, struct wl_pointer *w_pointer,
 435                           uint32_t serial, struct wl_surface *w_surface,
 436                           wl_fixed_t x, wl_fixed_t y)
 437 {
 438         struct wlt_display *disp = data;
 439         struct shl_dlist *iter;
 440         struct wlt_window *wnd;
 441         struct wlt_widget *widget;
 442
 443         if (!w_surface)
 444                 return;
 445
 446         shl_dlist_for_each(iter, &disp->window_list) {
 447                 wnd = shl_dlist_entry(iter, struct wlt_window, list);
 448                 if (wnd->w_surface == w_surface)
 449                         break;
 450         }
 451
 452         if (iter == &disp->window_list) {
 453                 log_debug("unknown surface");
 454                 return;
 455         }
 456
 457         disp->pointer_enter_serial = serial;
 458         disp->last_serial = serial;
 459         disp->pointer_focus = wnd;
 460         shl_dlist_for_each(iter, &wnd->widget_list) {
 461                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 462                 if (widget->pointer_enter_cb)
 463                         widget->pointer_enter_cb(widget, x >> 8, y >> 8,
 464                                                  widget->data);
 465         }
 466 }
 467
 468 static void pointer_leave(void *data, struct wl_pointer *w_pointer,
 469                           uint32_t serial, struct wl_surface *w_surface)
 470 {
 471         struct wlt_display *disp = data;
 472         struct shl_dlist *iter;
 473         struct wlt_window *wnd;
 474         struct wlt_widget *widget;
 475
 476         wnd = disp->pointer_focus;
 477         disp->pointer_focus = NULL;
 478         disp->last_serial = serial;
 479
 480         if (!wnd)
 481                 return;
 482
 483         shl_dlist_for_each(iter, &wnd->widget_list) {
 484                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 485                 if (widget->pointer_leave_cb)
 486                         widget->pointer_leave_cb(widget, widget->data);
 487         }
 488 }
 489
 490 static void pointer_motion(void *data, struct wl_pointer *w_pointer,
 491                            uint32_t time, wl_fixed_t x, wl_fixed_t y)
 492 {
 493         struct wlt_display *disp = data;
 494         struct shl_dlist *iter;
 495         struct wlt_window *wnd;
 496         struct wlt_widget *widget;
 497
 498         wnd = disp->pointer_focus;
 499         if (!wnd)
 500                 return;
 501
 502         shl_dlist_for_each(iter, &wnd->widget_list) {
 503                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 504                 if (widget->pointer_motion_cb)
 505                         widget->pointer_motion_cb(widget, x >> 8, y >> 8,
 506                                                   widget->data);
 507         }
 508 }
 509
 510 static void pointer_button(void *data, struct wl_pointer *w_pointer,
 511                            uint32_t serial, uint32_t time, uint32_t button,
 512                            uint32_t state)
 513 {
 514         struct wlt_display *disp = data;
 515         struct shl_dlist *iter;
 516         struct wlt_window *wnd;
 517         struct wlt_widget *widget;
 518
 519         wnd = disp->pointer_focus;
 520         disp->last_serial = serial;
 521
 522         if (!wnd)
 523                 return;
 524
 525         shl_dlist_for_each(iter, &wnd->widget_list) {
 526                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 527                 if (widget->pointer_button_cb)
 528                         widget->pointer_button_cb(widget, button, state,
 529                                                   widget->data);
 530         }
 531 }
 532
 533 static void pointer_axis(void *data, struct wl_pointer *w_pointer,
 534                          uint32_t time, uint32_t axis, wl_fixed_t value)
 535 {
 536 }
 537
 538 static const struct wl_pointer_listener pointer_listener = {
 539         .enter = pointer_enter,
 540         .leave = pointer_leave,
 541         .motion = pointer_motion,
 542         .button = pointer_button,
 543         .axis = pointer_axis,
 544 };
 545
 546 static void keyboard_keymap(void *data, struct wl_keyboard *keyboard,
 547                             uint32_t format, int fd, uint32_t size)
 548 {
 549         struct wlt_display *disp = data;
 550         char *map;
 551
 552         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
 553                 log_error("invalid keyboard format");
 554                 close(fd);
 555                 return;
 556         }
 557
 558         map = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 559         if (map == MAP_FAILED) {
 560                 log_error("cannot mmap keyboard keymap");
 561                 close(fd);
 562                 return;
 563         }
 564
 565         disp->xkb_keymap = xkb_map_new_from_string(disp->xkb_ctx, map,
 566                                                    XKB_KEYMAP_FORMAT_TEXT_V1,
 567                                                    0);
 568         munmap(map, size);
 569         close(fd);
 570
 571         if (!disp->xkb_keymap) {
 572                 log_error("cannot create xkb keymap");
 573                 return;
 574         }
 575
 576         disp->xkb_state = xkb_state_new(disp->xkb_keymap);
 577         if (!disp->xkb_state) {
 578                 log_error("cannot create XKB state object");
 579                 xkb_map_unref(disp->xkb_keymap);
 580                 disp->xkb_keymap = NULL;
 581                 return;
 582         }
 583 }
 584
 585 static void keyboard_enter(void *data, struct wl_keyboard *keyboard,
 586                            uint32_t serial, struct wl_surface *w_surface,
 587                            struct wl_array *keys)
 588 {
 589         struct wlt_display *disp = data;
 590         struct shl_dlist *iter;
 591         struct wlt_window *wnd;
 592
 593         disp->last_serial = serial;
 594         if (!disp->xkb_state)
 595                 return;
 596
 597         if (!w_surface)
 598                 return;
 599
 600         shl_dlist_for_each(iter, &disp->window_list) {
 601                 wnd = shl_dlist_entry(iter, struct wlt_window, list);
 602                 if (wnd->w_surface == w_surface)
 603                         break;
 604         }
 605
 606         if (iter == &disp->window_list)
 607                 return;
 608
 609         disp->keyboard_focus = wnd;
 610 }
 611
 612 static void keyboard_leave(void *data, struct wl_keyboard *keyboard,
 613                            uint32_t serial, struct wl_surface *surface)
 614 {
 615         struct wlt_display *disp = data;
 616
 617         disp->last_serial = serial;
 618         disp->keyboard_focus = NULL;
 619         ev_timer_update(disp->repeat_timer, NULL);
 620 }
 621
 622 static void keyboard_key(void *data, struct wl_keyboard *keyboard,
 623                          uint32_t serial, uint32_t time, uint32_t key,
 624                          uint32_t state_w)
 625 {
 626         struct wlt_display *disp = data;
 627         struct wlt_window *wnd = disp->keyboard_focus;
 628         uint32_t code, num_syms;
 629         unsigned int mask;
 630         enum wl_keyboard_key_state state = state_w;
 631         const xkb_keysym_t *syms;
 632         xkb_keysym_t sym;
 633         struct shl_dlist *iter;
 634         struct wlt_widget *widget;
 635         struct itimerspec spec;
 636
 637         disp->last_serial = serial;
 638         if (!disp->xkb_state)
 639                 return;
 640
 641         code = key + 8;
 642         if (!wnd)
 643                 return;
 644
 645         mask = shl_get_xkb_mods(disp->xkb_state);
 646         num_syms = xkb_key_get_syms(disp->xkb_state, code, &syms);
 647         sym = XKB_KEY_NoSymbol;
 648         if (num_syms == 1)
 649                 sym = syms[0];
 650
 651         shl_dlist_for_each(iter, &wnd->widget_list) {
 652                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 653                 if (widget->keyboard_cb)
 654                         widget->keyboard_cb(widget, mask, sym, state,
 655                                             widget->data);
 656         }
 657
 658         if (state == WL_KEYBOARD_KEY_STATE_RELEASED &&
 659             sym == disp->repeat_sym) {
 660                 ev_timer_update(disp->repeat_timer, NULL);
 661         } else if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
 662                 disp->repeat_sym = sym;
 663                 spec.it_interval.tv_sec = 0;
 664                 spec.it_interval.tv_nsec = 25 * 1000000;
 665                 spec.it_value.tv_sec = 0;
 666                 spec.it_value.tv_nsec = 250 * 1000000;
 667                 ev_timer_update(disp->repeat_timer, &spec);
 668         }
 669 }
 670
 671 static void repeat_event(struct ev_timer *timer, uint64_t num, void *data)
 672 {
 673         struct wlt_display *disp = data;
 674         struct wlt_window *wnd = disp->keyboard_focus;
 675         struct wlt_widget *widget;
 676         struct shl_dlist *iter;
 677         unsigned int mask;
 678
 679         if (!wnd)
 680                 return;
 681
 682         mask = shl_get_xkb_mods(disp->xkb_state);
 683         shl_dlist_for_each(iter, &wnd->widget_list) {
 684                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 685                 if (widget->keyboard_cb)
 686                         widget->keyboard_cb(widget, mask, disp->repeat_sym,
 687                                             WL_KEYBOARD_KEY_STATE_PRESSED,
 688                                             widget->data);
 689         }
 690 }
 691
 692 static void keyboard_modifiers(void *data, struct wl_keyboard *keyboard,
 693                                uint32_t serial, uint32_t mods_depressed,
 694                                uint32_t mods_latched, uint32_t mods_locked,
 695                                uint32_t group)
 696 {
 697         struct wlt_display *disp = data;
 698
 699         disp->last_serial = serial;
 700         if (!disp->xkb_state)
 701                 return;
 702
 703         xkb_state_update_mask(disp->xkb_state, mods_depressed, mods_latched,
 704                               mods_locked, 0, 0, group);
 705 }
 706
 707 static const struct wl_keyboard_listener keyboard_listener = {
 708         .keymap = keyboard_keymap,
 709         .enter = keyboard_enter,
 710         .leave = keyboard_leave,
 711         .key = keyboard_key,
 712         .modifiers = keyboard_modifiers,
 713 };
 714
 715 static void check_ready(struct wlt_display *disp)
 716 {
 717         if (disp->state > STATE_INIT)
 718                 return;
 719
 720         if (disp->w_comp &&
 721             disp->w_seat &&
 722             disp->w_shell &&
 723             disp->w_shm &&
 724             disp->w_pointer &&
 725             disp->w_keyboard) {
 726                 log_debug("wayland display initialized");
 727                 load_cursors(disp);
 728
 729                 disp->state = STATE_RUNNING;
 730                 shl_hook_call(disp->listeners, disp, (void*)WLT_DISPLAY_READY);
 731         }
 732 }
 733
 734 static void seat_capabilities(void *data, struct wl_seat *seat,
 735                               enum wl_seat_capability caps)
 736 {
 737         struct wlt_display *disp = data;
 738
 739         if (caps & WL_SEAT_CAPABILITY_POINTER && !disp->w_pointer) {
 740                 disp->w_pointer = wl_seat_get_pointer(seat);
 741                 wl_pointer_add_listener(disp->w_pointer, &pointer_listener,
 742                                         disp);
 743         }
 744
 745         if (caps & WL_SEAT_CAPABILITY_KEYBOARD && !disp->w_keyboard) {
 746                 disp->w_keyboard = wl_seat_get_keyboard(seat);
 747                 wl_keyboard_add_listener(disp->w_keyboard, &keyboard_listener,
 748                                          disp);
 749         }
 750
 751         check_ready(disp);
 752 }
 753
 754 static const struct wl_seat_listener seat_listener = {
 755         .capabilities = seat_capabilities,
 756 };
 757
 758 static void dp_global(struct wl_display *dp, uint32_t id, const char *iface,
 759                       uint32_t version, void *data)
 760 {
 761         struct wlt_display *disp = data;
 762
 763         if (!strcmp(iface, "wl_display")) {
 764                 log_debug("new wl_display global");
 765                 return;
 766         } else if (!strcmp(iface, "wl_compositor")) {
 767                 if (disp->w_comp) {
 768                         log_error("global wl_compositor advertised twice");
 769                         return;
 770                 }
 771                 disp->w_comp = wl_display_bind(disp->dp,
 772                                                id,
 773                                                &wl_compositor_interface);
 774                 if (!disp->w_comp) {
 775                         log_error("cannot bind wl_compositor object");
 776                         return;
 777                 }
 778         } else if (!strcmp(iface, "wl_seat")) {
 779                 if (disp->w_seat) {
 780                         log_error("global wl_seat advertised twice");
 781                         return;
 782                 }
 783                 disp->w_seat = wl_display_bind(disp->dp,
 784                                                id,
 785                                                &wl_seat_interface);
 786                 if (!disp->w_seat) {
 787                         log_error("cannot bind wl_seat object");
 788                         return;
 789                 }
 790
 791                 wl_seat_add_listener(disp->w_seat, &seat_listener, disp);
 792         } else if (!strcmp(iface, "wl_shell")) {
 793                 if (disp->w_shell) {
 794                         log_error("global wl_shell advertised twice");
 795                         return;
 796                 }
 797                 disp->w_shell = wl_display_bind(disp->dp,
 798                                                 id,
 799                                                 &wl_shell_interface);
 800                 if (!disp->w_shell) {
 801                         log_error("cannot bind wl_shell object");
 802                         return;
 803                 }
 804         } else if (!strcmp(iface, "wl_shm")) {
 805                 if (disp->w_shm) {
 806                         log_error("global wl_shm advertised twice");
 807                         return;
 808                 }
 809                 disp->w_shm = wl_display_bind(disp->dp,
 810                                               id,
 811                                               &wl_shm_interface);
 812                 if (!disp->w_shm) {
 813                         log_error("cannot bind wl_shm object");
 814                         return;
 815                 }
 816         } else {
 817                 log_debug("ignoring new unknown global %s", iface);
 818                 return;
 819         }
 820
 821         log_debug("new global %s", iface);
 822
 823         check_ready(disp);
 824 }
 825
 826 int wlt_display_new(struct wlt_display **out,
 827                     struct ev_eloop *eloop)
 828 {
 829         struct wlt_display *disp;
 830         int ret;
 831
 832         if (!out || !eloop)
 833                 return -EINVAL;
 834
 835         log_debug("creating new wlt-display");
 836
 837         disp = malloc(sizeof(*disp));
 838         if (!disp)
 839                 return -ENOMEM;
 840         memset(disp, 0, sizeof(*disp));
 841         disp->ref = 1;
 842         disp->eloop = eloop;
 843         shl_dlist_init(&disp->window_list);
 844
 845         ret = shl_hook_new(&disp->listeners);
 846         if (ret) {
 847                 log_error("cannot create listeners hook");
 848                 goto err_free;
 849         }
 850
 851         disp->dp = wl_display_connect(NULL);
 852         if (!disp->dp) {
 853                 log_error("cannot connect to wayland socket (%d): %m", errno);
 854                 ret = -EFAULT;
 855                 goto err_listener;
 856         }
 857
 858         ret = ev_eloop_new_fd(eloop,
 859                               &disp->dp_fd,
 860                               wl_display_get_fd(disp->dp,
 861                                                 dp_mask_update,
 862                                                 disp),
 863                               EV_READABLE,
 864                               dp_event,
 865                               disp);
 866         if (ret) {
 867                 log_error("cannot create event-fd for wayland display (%d)",
 868                           ret);
 869                 goto err_dp;
 870         }
 871
 872         ret = ev_eloop_new_timer(eloop, &disp->repeat_timer, NULL,
 873                                  repeat_event, disp);
 874         if (ret) {
 875                 log_error("cannot create repeat-timer");
 876                 goto err_dp_fd;
 877         }
 878
 879         disp->dp_listener = wl_display_add_global_listener(disp->dp,
 880                                                            dp_global,
 881                                                            disp);
 882         if (!disp->dp_listener) {
 883                 log_error("cannot add wayland global listener (%d)", errno);
 884                 goto err_timer;
 885         }
 886
 887         disp->xkb_ctx = xkb_context_new(0);
 888         if (!disp->xkb_ctx) {
 889                 log_error("cannot create XKB context");
 890                 goto err_timer;
 891         }
 892
 893         log_debug("wlt-display waiting for globals...");
 894
 895         ev_eloop_ref(disp->eloop);
 896         *out = disp;
 897         return 0;
 898
 899 err_timer:
 900         ev_eloop_rm_timer(disp->repeat_timer);
 901 err_dp_fd:
 902         ev_eloop_rm_fd(disp->dp_fd);
 903 err_dp:
 904         wl_display_disconnect(disp->dp);
 905 err_listener:
 906         shl_hook_free(disp->listeners);
 907 err_free:
 908         free(disp);
 909         return ret;
 910 }
 911
 912 void wlt_display_ref(struct wlt_display *disp)
 913 {
 914         if (!disp || !disp->ref)
 915                 return;
 916
 917         ++disp->ref;
 918 }
 919
 920 void wlt_display_unref(struct wlt_display *disp)
 921 {
 922         if (!disp || !disp->ref || --disp->ref)
 923                 return;
 924
 925         unload_cursors(disp);
 926         wl_display_remove_global_listener(disp->dp, disp->dp_listener);
 927         wl_display_flush(disp->dp);
 928         wl_display_disconnect(disp->dp);
 929         ev_eloop_rm_timer(disp->repeat_timer);
 930         ev_eloop_rm_fd(disp->dp_fd);
 931         xkb_context_unref(disp->xkb_ctx);
 932         shl_hook_free(disp->listeners);
 933         ev_eloop_unref(disp->eloop);
 934         free(disp);
 935 }
 936
 937 int wlt_display_register_cb(struct wlt_display *disp,
 938                             wlt_display_cb cb, void *data)
 939 {
 940         if (!disp)
 941                 return -EINVAL;
 942
 943         return shl_hook_add_cast(disp->listeners, cb, data);
 944 }
 945
 946 void wlt_display_unregister_cb(struct wlt_display *disp,
 947                                wlt_display_cb cb, void *data)
 948 {
 949         if (!disp)
 950                 return;
 951
 952         shl_hook_rm_cast(disp->listeners, cb, data);
 953 }
 954
 955 static void shell_surface_ping(void *data, struct wl_shell_surface *s,
 956                                uint32_t serial)
 957 {
 958         wl_shell_surface_pong(s, serial);
 959 }
 960
 961 static void wlt_window_do_redraw(struct wlt_window *wnd,
 962                                  unsigned int oldw,
 963                                  unsigned int oldh)
 964 {
 965         struct shl_dlist *iter;
 966         struct wlt_widget *widget;
 967         unsigned int x, y, flags;
 968         struct wlt_rect alloc;
 969
 970         flags = 0;
 971         if (wnd->maximized)
 972                 flags |= WLT_WINDOW_MAXIMIZED;
 973         if (wnd->fullscreen)
 974                 flags |= WLT_WINDOW_FULLSCREEN;
 975
 976         alloc.x = 0;
 977         alloc.y = 0;
 978         alloc.width = wnd->buffer.width;
 979         alloc.height = wnd->buffer.height;
 980         shl_dlist_for_each(iter, &wnd->widget_list) {
 981                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 982                 if (widget->resize_cb)
 983                         widget->resize_cb(widget, flags, &alloc, widget->data);
 984         }
 985
 986         memset(wnd->buffer.data, 0,
 987                wnd->buffer.stride * wnd->buffer.height);
 988
 989         wnd->skip_damage = true;
 990         shl_dlist_for_each(iter, &wnd->widget_list) {
 991                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
 992                 if (widget->redraw_cb)
 993                         widget->redraw_cb(widget, flags, widget->data);
 994         }
 995         wnd->skip_damage = false;
 996
 997         if (!wnd->buffer_attached) {
 998                 wnd->buffer_attached = true;
 999                 if (wnd->resize_edges & WL_SHELL_SURFACE_RESIZE_LEFT)
1000                         x = (int)oldw - wnd->buffer.width;
1001                 else
1002                         x = 0;
1003                 if (wnd->resize_edges & WL_SHELL_SURFACE_RESIZE_TOP)
1004                         y = (int)oldh - wnd->buffer.height;
1005                 else
1006                         y = 0;
1007                 wl_surface_attach(wnd->w_surface, wnd->w_buffer, x, y);
1008                 wnd->resize_edges = 0;
1009         }
1010
1011         wl_surface_damage(wnd->w_surface, 0, 0, wnd->buffer.width,
1012                           wnd->buffer.height);
1013 }
1014
1015 static int resize_window(struct wlt_window *wnd, unsigned int width,
1016                          unsigned int height, bool force_redraw)
1017 {
1018         struct shl_dlist *iter;
1019         struct wlt_widget *widget;
1020         struct wl_buffer *old_buffer = NULL;
1021         struct wlt_pool *old_pool = NULL;
1022         size_t nsize;
1023         int ret;
1024         unsigned int oldw, oldh, neww, newh, minw, minh, flags;
1025
1026         if (!wnd || !width || !height)
1027                 return -EINVAL;
1028
1029         flags = 0;
1030         if (wnd->maximized)
1031                 flags |= WLT_WINDOW_MAXIMIZED;
1032         if (wnd->fullscreen)
1033                 flags |= WLT_WINDOW_FULLSCREEN;
1034
1035         neww = 0;
1036         newh = 0;
1037         minw = 0;
1038         minh = 0;
1039         shl_dlist_for_each(iter, &wnd->widget_list) {
1040                 widget = shl_dlist_entry(iter, struct wlt_widget, list);
1041                 if (widget->prepare_resize_cb)
1042                         widget->prepare_resize_cb(widget,
1043                                                   flags,
1044                                                   width, height,
1045                                                   &minw, &minh,
1046                                                   &neww, &newh,
1047                                                   widget->data);
1048         }
1049
1050         if (neww)
1051                 width = neww;
1052         if (newh)
1053                 height = newh;
1054
1055         if (width == wnd->buffer.width &&
1056             height == wnd->buffer.height) {
1057                 if (force_redraw)
1058                         wlt_window_do_redraw(wnd, width, height);
1059                 return 0;
1060         }
1061
1062         oldw = wnd->buffer.width;
1063         oldh = wnd->buffer.height;
1064
1065         nsize = width * height * 4;
1066         if (wnd->pool && wnd->pool->size >= nsize) {
1067                 old_buffer = wnd->w_buffer;
1068                 wnd->w_buffer = wl_shm_pool_create_buffer(wnd->pool->w_pool,
1069                                                 0, width, height,
1070                                                 width * 4,
1071                                                 WL_SHM_FORMAT_ARGB8888);
1072                 if (!wnd->w_buffer) {
1073                         log_error("cannot create wayland shm buffer");
1074                         wnd->w_buffer = old_buffer;
1075                         return -ENOMEM;
1076                 }
1077         } else {
1078                 old_pool = wnd->pool;
1079                 ret = wlt_pool_new(&wnd->pool, wnd->disp, nsize);
1080                 if (ret) {
1081                         log_error("cannot create memory pool");
1082                         wnd->pool = old_pool;
1083                         return ret;
1084                 }
1085
1086                 old_buffer = wnd->w_buffer;
1087                 wnd->w_buffer = wl_shm_pool_create_buffer(wnd->pool->w_pool,
1088                                                 0, width, height,
1089                                                 width * 4,
1090                                                 WL_SHM_FORMAT_ARGB8888);
1091                 if (!wnd->w_buffer) {
1092                         log_error("cannot create wayland shm buffer");
1093                         wnd->w_buffer = old_buffer;
1094                         wlt_pool_free(wnd->pool);
1095                         wnd->pool = old_pool;
1096                         return -ENOMEM;
1097                 }
1098         }
1099
1100         wnd->buffer.data = wnd->pool->data;
1101         wnd->buffer.width = width;
1102         wnd->buffer.height = height;
1103         wnd->buffer.stride = width * 4;
1104         wnd->buffer_attached = false;
1105
1106         wlt_window_do_redraw(wnd, oldw, oldh);
1107
1108         if (old_buffer)
1109                 wl_buffer_destroy(old_buffer);
1110         if (old_pool)
1111                 wlt_pool_free(old_pool);
1112
1113         return 0;
1114 }
1115
1116 static void frame_callback(void *data, struct wl_callback *w_callback,
1117                            uint32_t time);
1118 static void idle_frame(struct ev_eloop *eloop, void *unused, void *data);
1119
1120 static const struct wl_callback_listener frame_callback_listener = {
1121         .done = frame_callback,
1122 };
1123
1124 static void do_frame(struct wlt_window *wnd)
1125 {
1126         bool force;
1127
1128         wnd->idle_pending = false;
1129         ev_eloop_unregister_idle_cb(wnd->disp->eloop, idle_frame, wnd);
1130
1131         if (wnd->need_resize) {
1132                 force = wnd->need_redraw;
1133                 wnd->need_frame = true;
1134                 wnd->need_resize = false;
1135                 wnd->need_redraw = false;
1136                 resize_window(wnd, wnd->new_width, wnd->new_height, force);
1137         }
1138
1139         if (wnd->need_redraw) {
1140                 wnd->need_frame = true;
1141                 wnd->need_redraw = false;
1142                 wlt_window_do_redraw(wnd, wnd->buffer.width,
1143                                      wnd->buffer.height);
1144         }
1145
1146         if (wnd->need_frame) {
1147                 wnd->w_frame = wl_surface_frame(wnd->w_surface);
1148                 wl_callback_add_listener(wnd->w_frame,
1149                                          &frame_callback_listener, wnd);
1150         }
1151 }
1152
1153 static void frame_callback(void *data, struct wl_callback *w_callback,
1154                            uint32_t time)
1155 {
1156         struct wlt_window *wnd = data;
1157
1158         wl_callback_destroy(w_callback);
1159         wnd->w_frame = NULL;
1160         wnd->need_frame = false;
1161
1162         do_frame(wnd);
1163 }
1164
1165 static void idle_frame(struct ev_eloop *eloop, void *unused, void *data)
1166 {
1167         struct wlt_window *wnd = data;
1168
1169         do_frame(wnd);
1170 }
1171
1172 /*
1173  * Buffer Handling and Frame Scheduling
1174  * We use wl_shm for buffer allocation. This means, we have a single buffer
1175  * client side and the server loads it into its backbuffer for rendering. If the
1176  * server does not do this, we are screwed anyway, but that's on behalf of the
1177  * server, so we don't care.
1178  *
1179  * However, this means, when we create a buffer, we need to notify the
1180  * compositor and then wait until the compositor has created its back-buffer,
1181  * before we continue using this buffer. We can use the "frame" callback to get
1182  * notified about this.
1183  *
1184  * The logic we have is:
1185  * You set the boolean flags what action is needed in wlt_window and then call
1186  * "schedule_frame()". If we didn't already do any buffer operations in this
1187  * frame, then this function schedules an idle-callback which then performs
1188  * the requested functions (flags in wlt_window). Afterwards, it sets a marker
1189  * that this frame was already used and schedules a frame-callback.
1190  * If during this time another call to schedule_frame() is made, we do nothing
1191  * but wait for the frame-callback. It will then directly perform all the
1192  * requested functions and reschedule a frame-callback.
1193  * If nothing was schedule for one frame, we have no more interest in
1194  * frame-callbacks and thus we set "need_frame" to false again and don't
1195  * schedule any more frame-callbacks.
1196  */
1197 static void schedule_frame(struct wlt_window *wnd)
1198 {
1199         int ret;
1200
1201         if (!wnd || wnd->w_frame)
1202                 return;
1203
1204         if (wnd->need_frame || wnd->idle_pending)
1205                 return;
1206
1207         ret = ev_eloop_register_idle_cb(wnd->disp->eloop, idle_frame, wnd);
1208         if (ret)
1209                 log_error("cannot schedule idle callback: %d", ret);
1210         else
1211                 wnd->idle_pending = true;
1212 }
1213
1214 static void shell_surface_configure(void *data, struct wl_shell_surface *s,
1215                                     uint32_t edges, int32_t width,
1216                                     int32_t height)
1217 {
1218         struct wlt_window *wnd = data;
1219
1220         if (width <= 0)
1221                 width = 1;
1222         if (height <= 0)
1223                 height = 1;
1224
1225         wnd->resize_edges = edges;
1226         wlt_window_set_size(wnd, width, height);
1227 }
1228
1229 static void shell_surface_popup_done(void *data, struct wl_shell_surface *s)
1230 {
1231 }
1232
1233 static const struct wl_shell_surface_listener shell_surface_listener = {
1234         .ping = shell_surface_ping,
1235         .configure = shell_surface_configure,
1236         .popup_done = shell_surface_popup_done,
1237 };
1238
1239 static void close_window(struct ev_eloop *eloop, void *unused, void *data)
1240 {
1241         struct wlt_window *wnd = data;
1242
1243         ev_eloop_unregister_idle_cb(eloop, close_window, wnd);
1244         wnd->close_pending = false;
1245
1246         if (wnd->close_cb)
1247                 wnd->close_cb(wnd, wnd->data);
1248 }
1249
1250 int wlt_display_create_window(struct wlt_display *disp,
1251                               struct wlt_window **out,
1252                               unsigned int width,
1253                               unsigned int height,
1254                               void *data)
1255 {
1256         struct wlt_window *wnd;
1257         int ret;
1258
1259         if (!disp || !out || !width || !height)
1260                 return -EINVAL;
1261
1262         if (disp->state != STATE_RUNNING) {
1263                 log_error("cannot create window, display is not running but in state %u",
1264                           disp->state);
1265                 return -EBUSY;
1266         }
1267
1268         wnd = malloc(sizeof(*wnd));
1269         if (!wnd)
1270                 return -ENOMEM;
1271         memset(wnd, 0, sizeof(*wnd));
1272         wnd->ref = 1;
1273         wnd->disp = disp;
1274         wnd->data = data;
1275         shl_dlist_init(&wnd->widget_list);
1276
1277         wnd->w_surface = wl_compositor_create_surface(disp->w_comp);
1278         if (!wnd->w_surface) {
1279                 log_error("cannot create wayland surface");
1280                 ret = -EFAULT;
1281                 goto err_free;
1282         }
1283
1284         wnd->w_shell_surface = wl_shell_get_shell_surface(disp->w_shell,
1285                                                           wnd->w_surface);
1286         if (!wnd->w_shell_surface) {
1287                 log_error("cannot retrieve shell-surface for wayland surface");
1288                 ret = -EFAULT;
1289                 goto err_surface;
1290         }
1291
1292         wl_shell_surface_add_listener(wnd->w_shell_surface,
1293                                       &shell_surface_listener, wnd);
1294         wl_shell_surface_set_toplevel(wnd->w_shell_surface);
1295
1296         ret = resize_window(wnd, width, height, true);
1297         if (ret)
1298                 goto err_shell_surface;
1299
1300         wlt_display_ref(disp);
1301         shl_dlist_link(&disp->window_list, &wnd->list);
1302         *out = wnd;
1303         return 0;
1304
1305 err_shell_surface:
1306         wl_shell_surface_destroy(wnd->w_shell_surface);
1307 err_surface:
1308         wl_surface_destroy(wnd->w_surface);
1309 err_free:
1310         free(wnd);
1311         return ret;
1312 }
1313
1314 void wlt_window_ref(struct wlt_window *wnd)
1315 {
1316         if (!wnd || !wnd->ref)
1317                 return;
1318
1319         ++wnd->ref;
1320 }
1321
1322 void wlt_window_unref(struct wlt_window *wnd)
1323 {
1324         struct wlt_widget *widget;
1325
1326         if (!wnd || !wnd->ref || --wnd->ref)
1327                 return;
1328
1329         while (!shl_dlist_empty(&wnd->widget_list)) {
1330                 widget = shl_dlist_entry(wnd->widget_list.next,
1331                                          struct wlt_widget, list);
1332                 wlt_widget_destroy(widget);
1333         }
1334
1335         if (wnd->close_pending)
1336                 ev_eloop_unregister_idle_cb(wnd->disp->eloop, close_window,
1337                                             wnd);
1338         if (wnd->idle_pending)
1339                 ev_eloop_unregister_idle_cb(wnd->disp->eloop, idle_frame, wnd);
1340         shl_dlist_unlink(&wnd->list);
1341         if (wnd->w_frame)
1342                 wl_callback_destroy(wnd->w_frame);
1343         if (wnd->w_buffer)
1344                 wl_buffer_destroy(wnd->w_buffer);
1345         if (wnd->pool)
1346                 wlt_pool_free(wnd->pool);
1347         wl_shell_surface_destroy(wnd->w_shell_surface);
1348         wl_surface_destroy(wnd->w_surface);
1349         wlt_display_unref(wnd->disp);
1350         free(wnd);
1351 }
1352
1353 int wlt_window_create_widget(struct wlt_window *wnd,
1354                              struct wlt_widget **out,
1355                              void *data)
1356 {
1357         struct wlt_widget *widget;
1358
1359         if (!wnd || !out)
1360                 return -EINVAL;
1361
1362         widget = malloc(sizeof(*widget));
1363         if (!widget)
1364                 return -ENOMEM;
1365         memset(widget, 0, sizeof(*widget));
1366         widget->wnd = wnd;
1367         widget->data = data;
1368
1369         wlt_window_set_size(wnd, wnd->buffer.width, wnd->buffer.height);
1370         shl_dlist_link_tail(&wnd->widget_list, &widget->list);
1371         *out = widget;
1372         return 0;
1373 }
1374
1375 void wlt_window_schedule_redraw(struct wlt_window *wnd)
1376 {
1377         if (!wnd)
1378                 return;
1379
1380         wnd->need_redraw = true;
1381         schedule_frame(wnd);
1382 }
1383
1384 void wlt_window_damage(struct wlt_window *wnd,
1385                        struct wlt_rect *damage)
1386 {
1387         if (!wnd || !damage || wnd->skip_damage)
1388                 return;
1389
1390         wl_surface_damage(wnd->w_surface, damage->x, damage->y,
1391                           damage->width, damage->height);
1392 }
1393
1394 void wlt_window_get_buffer(struct wlt_window *wnd,
1395                            const struct wlt_rect *alloc,
1396                            struct wlt_shm_buffer *buf)
1397 {
1398         struct wlt_shm_buffer *rbuf;
1399
1400         if (!wnd || !buf)
1401                 return;
1402
1403         rbuf = &wnd->buffer;
1404
1405         if (!alloc) {
1406                 memcpy(buf, rbuf, sizeof(*buf));
1407                 return;
1408         }
1409
1410         if (alloc->x >= rbuf->width ||
1411             alloc->y >= rbuf->height) {
1412                 memset(buf, 0, sizeof(*buf));
1413                 return;
1414         }
1415
1416         /* set width */
1417         if (alloc->x + alloc->width > rbuf->width)
1418                 buf->width = rbuf->width - alloc->x;
1419         else
1420                 buf->width = alloc->width;
1421
1422         /* set height */
1423         if (alloc->y + alloc->height > rbuf->height)
1424                 buf->height = rbuf->height - alloc->y;
1425         else
1426                 buf->height = alloc->height;
1427
1428         /* set stride */
1429         buf->stride  = rbuf->stride;
1430
1431         /* set data */
1432         buf->data  = rbuf->data;
1433         buf->data += alloc->y * rbuf->stride;
1434         buf->data += alloc->x * 4;
1435 }
1436
1437 void wlt_window_move(struct wlt_window *wnd)
1438 {
1439         if (!wnd)
1440                 return;
1441
1442         wl_shell_surface_move(wnd->w_shell_surface,
1443                               wnd->disp->w_seat,
1444                               wnd->disp->last_serial);
1445 }
1446
1447 void wlt_window_resize(struct wlt_window *wnd, uint32_t edges)
1448 {
1449         if (!wnd)
1450                 return;
1451
1452         wl_shell_surface_resize(wnd->w_shell_surface,
1453                                 wnd->disp->w_seat,
1454                                 wnd->disp->last_serial,
1455                                 edges);
1456 }
1457
1458 int wlt_window_set_size(struct wlt_window *wnd,
1459                         unsigned int width, unsigned int height)
1460 {
1461         if (!wnd || !width || !height)
1462                 return -EINVAL;
1463
1464         wnd->new_width = width;
1465         wnd->new_height = height;
1466         wnd->need_resize = true;
1467         schedule_frame(wnd);
1468
1469         return 0;
1470 }
1471
1472 void wlt_window_set_cursor(struct wlt_window *wnd, unsigned int cursor)
1473 {
1474         if (!wnd)
1475                 return;
1476
1477         set_cursor(wnd->disp, cursor);
1478 }
1479
1480 void wlt_window_set_close_cb(struct wlt_window *wnd,
1481                              wlt_window_close_cb cb)
1482 {
1483         if (!wnd)
1484                 return;
1485
1486         wnd->close_cb = cb;
1487 }
1488
1489 void wlt_window_close(struct wlt_window *wnd)
1490 {
1491         if (!wnd)
1492                 return;
1493
1494         wnd->close_pending = true;
1495         ev_eloop_register_idle_cb(wnd->disp->eloop, close_window, wnd);
1496 }
1497
1498 void wlt_window_toggle_maximize(struct wlt_window *wnd)
1499 {
1500         if (!wnd)
1501                 return;
1502
1503         if (wnd->maximized) {
1504                 wl_shell_surface_set_toplevel(wnd->w_shell_surface);
1505                 wlt_window_set_size(wnd, wnd->saved_width, wnd->saved_height);
1506         } else {
1507                 if (!wnd->fullscreen) {
1508                         wnd->saved_width = wnd->buffer.width;
1509                         wnd->saved_height = wnd->buffer.height;
1510                 }
1511                 wl_shell_surface_set_maximized(wnd->w_shell_surface, NULL);
1512         }
1513
1514         wnd->maximized = !wnd->maximized;
1515 }
1516
1517 void wlt_window_toggle_fullscreen(struct wlt_window *wnd)
1518 {
1519         if (!wnd)
1520                 return;
1521
1522         if (wnd->fullscreen) {
1523                 wl_shell_surface_set_toplevel(wnd->w_shell_surface);
1524                 wlt_window_set_size(wnd, wnd->saved_width, wnd->saved_height);
1525         } else {
1526                 if (!wnd->maximized) {
1527                         wnd->saved_width = wnd->buffer.width;
1528                         wnd->saved_height = wnd->buffer.height;
1529                 }
1530                 wl_shell_surface_set_fullscreen(wnd->w_shell_surface,
1531                                 WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
1532                                 0, NULL);
1533         }
1534
1535         wnd->fullscreen = !wnd->fullscreen;
1536 }
1537
1538 struct ev_eloop *wlt_window_get_eloop(struct wlt_window *wnd)
1539 {
1540         if (!wnd)
1541                 return NULL;
1542
1543         return wnd->disp->eloop;
1544 }
1545
1546 void wlt_widget_destroy(struct wlt_widget *widget)
1547 {
1548         if (!widget)
1549                 return;
1550
1551         if (widget->destroy_cb)
1552                 widget->destroy_cb(widget, widget->data);
1553         shl_dlist_unlink(&widget->list);
1554         free(widget);
1555 }
1556
1557 struct wlt_window *wlt_widget_get_window(struct wlt_widget *widget)
1558 {
1559         if (!widget)
1560                 return NULL;
1561
1562         return widget->wnd;
1563 }
1564
1565 void wlt_widget_set_redraw_cb(struct wlt_widget *widget,
1566                               wlt_widget_redraw_cb cb)
1567 {
1568         if (!widget)
1569                 return;
1570
1571         widget->redraw_cb = cb;
1572 }
1573
1574 void wlt_widget_set_destroy_cb(struct wlt_widget *widget,
1575                                wlt_widget_destroy_cb cb)
1576 {
1577         if (!widget)
1578                 return;
1579
1580         widget->destroy_cb = cb;
1581 }
1582
1583 void wlt_widget_set_resize_cb(struct wlt_widget *widget,
1584                               wlt_widget_prepare_resize_cb prepare_cb,
1585                               wlt_widget_resize_cb cb)
1586 {
1587         if (!widget)
1588                 return;
1589
1590         widget->prepare_resize_cb = prepare_cb;
1591         widget->resize_cb = cb;
1592 }
1593
1594 void wlt_widget_set_pointer_cb(struct wlt_widget *widget,
1595                                wlt_widget_pointer_enter_cb enter_cb,
1596                                wlt_widget_pointer_leave_cb leave_cb,
1597                                wlt_widget_pointer_motion_cb motion_cb,
1598                                wlt_widget_pointer_button_cb button_cb)
1599 {
1600         if (!widget)
1601                 return;
1602
1603         widget->pointer_enter_cb = enter_cb;
1604         widget->pointer_leave_cb = leave_cb;
1605         widget->pointer_motion_cb = motion_cb;
1606         widget->pointer_button_cb = button_cb;
1607 }
1608
1609 void wlt_widget_set_keyboard_cb(struct wlt_widget *widget,
1610                                 wlt_widget_keyboard_cb cb)
1611 {
1612         if (!widget)
1613                 return;
1614
1615         widget->keyboard_cb = cb;
1616 }