src/shell.c

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  * Copyright © 2011-2012 Collabora, Ltd.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <stdbool.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <linux/input.h>
  30 #include <assert.h>
  31 #include <signal.h>
  32 #include <math.h>
  33
  34 #include <wayland-server.h>
  35 #include "compositor.h"
  36 #include "desktop-shell-server-protocol.h"
  37 #include "../shared/config-parser.h"
  38
  39 struct shell_surface;
  40
  41 struct wl_shell {
  42         struct weston_compositor *compositor;
  43         struct weston_shell shell;
  44
  45         struct {
  46                 struct weston_process process;
  47                 struct wl_client *client;
  48                 struct wl_resource *desktop_shell;
  49
  50                 unsigned deathcount;
  51                 uint32_t deathstamp;
  52         } child;
  53
  54         bool locked;
  55         bool prepare_event_sent;
  56
  57         struct shell_surface *lock_surface;
  58         struct wl_listener lock_surface_listener;
  59         struct wl_list hidden_surface_list;
  60
  61         struct wl_list backgrounds;
  62         struct wl_list panels;
  63
  64         struct {
  65                 char *path;
  66                 int duration;
  67                 struct wl_resource *binding;
  68                 struct wl_list surfaces;
  69                 struct weston_process process;
  70         } screensaver;
  71 };
  72
  73 enum shell_surface_type {
  74         SHELL_SURFACE_NONE,
  75
  76         SHELL_SURFACE_PANEL,
  77         SHELL_SURFACE_BACKGROUND,
  78         SHELL_SURFACE_LOCK,
  79         SHELL_SURFACE_SCREENSAVER,
  80
  81         SHELL_SURFACE_TOPLEVEL,
  82         SHELL_SURFACE_TRANSIENT,
  83         SHELL_SURFACE_FULLSCREEN,
  84         SHELL_SURFACE_MAXIMIZED,
  85         SHELL_SURFACE_POPUP
  86 };
  87
  88 struct shell_surface {
  89         struct wl_resource resource;
  90
  91         struct weston_surface *surface;
  92         struct wl_listener surface_destroy_listener;
  93         struct shell_surface *parent;
  94
  95         enum shell_surface_type type;
  96         int32_t saved_x, saved_y;
  97
  98         struct {
  99                 struct weston_transform transform;
 100                 struct weston_matrix rotation;
 101         } rotation;
 102
 103         struct {
 104                 struct wl_pointer_grab grab;
 105                 uint32_t time;
 106                 int32_t x, y;
 107                 struct weston_transform parent_transform;
 108                 int32_t initial_up;
 109         } popup;
 110
 111         struct weston_output *fullscreen_output;
 112         struct weston_output *output;
 113         struct wl_list link;
 114 };
 115
 116 struct weston_move_grab {
 117         struct wl_pointer_grab grab;
 118         struct weston_surface *surface;
 119         int32_t dx, dy;
 120 };
 121
 122 struct rotate_grab {
 123         struct wl_pointer_grab grab;
 124         struct shell_surface *surface;
 125         struct weston_matrix rotation;
 126         struct {
 127                 int32_t x;
 128                 int32_t y;
 129         } center;
 130 };
 131
 132 static void
 133 shell_configuration(struct wl_shell *shell)
 134 {
 135         char *config_file;
 136         char *path = NULL;
 137         int duration = 60;
 138
 139         struct config_key saver_keys[] = {
 140                 { "path",       CONFIG_KEY_STRING,  &path },
 141                 { "duration",   CONFIG_KEY_INTEGER, &duration },
 142         };
 143
 144         struct config_section cs[] = {
 145                 { "screensaver", saver_keys, ARRAY_LENGTH(saver_keys), NULL },
 146         };
 147
 148         config_file = config_file_path("weston-desktop-shell.ini");
 149         parse_config_file(config_file, cs, ARRAY_LENGTH(cs), shell);
 150         free(config_file);
 151
 152         shell->screensaver.path = path;
 153         shell->screensaver.duration = duration;
 154 }
 155
 156 static void
 157 noop_grab_focus(struct wl_pointer_grab *grab, uint32_t time,
 158                 struct wl_surface *surface, int32_t x, int32_t y)
 159 {
 160         grab->focus = NULL;
 161 }
 162
 163 static void
 164 move_grab_motion(struct wl_pointer_grab *grab,
 165                  uint32_t time, int32_t x, int32_t y)
 166 {
 167         struct weston_move_grab *move = (struct weston_move_grab *) grab;
 168         struct wl_input_device *device = grab->input_device;
 169         struct weston_surface *es = move->surface;
 170
 171         weston_surface_configure(es,
 172                                  device->x + move->dx,
 173                                  device->y + move->dy,
 174                                  es->geometry.width, es->geometry.height);
 175 }
 176
 177 static void
 178 move_grab_button(struct wl_pointer_grab *grab,
 179                  uint32_t time, int32_t button, int32_t state)
 180 {
 181         struct wl_input_device *device = grab->input_device;
 182
 183         if (device->button_count == 0 && state == 0) {
 184                 wl_input_device_end_pointer_grab(device, time);
 185                 free(grab);
 186         }
 187 }
 188
 189 static const struct wl_pointer_grab_interface move_grab_interface = {
 190         noop_grab_focus,
 191         move_grab_motion,
 192         move_grab_button,
 193 };
 194
 195 static int
 196 weston_surface_move(struct weston_surface *es,
 197                     struct weston_input_device *wd, uint32_t time)
 198 {
 199         struct weston_move_grab *move;
 200
 201         move = malloc(sizeof *move);
 202         if (!move)
 203                 return -1;
 204
 205         move->grab.interface = &move_grab_interface;
 206         move->dx = es->geometry.x - wd->input_device.grab_x;
 207         move->dy = es->geometry.y - wd->input_device.grab_y;
 208         move->surface = es;
 209
 210         wl_input_device_start_pointer_grab(&wd->input_device, &move->grab, time);
 211
 212         wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0);
 213
 214         return 0;
 215 }
 216
 217 static void
 218 shell_surface_move(struct wl_client *client, struct wl_resource *resource,
 219                    struct wl_resource *input_resource, uint32_t time)
 220 {
 221         struct weston_input_device *wd = input_resource->data;
 222         struct shell_surface *shsurf = resource->data;
 223
 224         if (wd->input_device.button_count == 0 ||
 225             wd->input_device.grab_time != time ||
 226             wd->input_device.pointer_focus != &shsurf->surface->surface)
 227                 return;
 228
 229         if (weston_surface_move(shsurf->surface, wd, time) < 0)
 230                 wl_resource_post_no_memory(resource);
 231 }
 232
 233 struct weston_resize_grab {
 234         struct wl_pointer_grab grab;
 235         uint32_t edges;
 236         int32_t width, height;
 237         struct shell_surface *shsurf;
 238 };
 239
 240 static void
 241 resize_grab_motion(struct wl_pointer_grab *grab,
 242                    uint32_t time, int32_t x, int32_t y)
 243 {
 244         struct weston_resize_grab *resize = (struct weston_resize_grab *) grab;
 245         struct wl_input_device *device = grab->input_device;
 246         int32_t width, height;
 247         int32_t from_x, from_y;
 248         int32_t to_x, to_y;
 249
 250         weston_surface_from_global(resize->shsurf->surface,
 251                                    device->grab_x, device->grab_y,
 252                                    &from_x, &from_y);
 253         weston_surface_from_global(resize->shsurf->surface,
 254                                    device->x, device->y, &to_x, &to_y);
 255
 256         if (resize->edges & WL_SHELL_SURFACE_RESIZE_LEFT) {
 257                 width = resize->width + from_x - to_x;
 258         } else if (resize->edges & WL_SHELL_SURFACE_RESIZE_RIGHT) {
 259                 width = resize->width + to_x - from_x;
 260         } else {
 261                 width = resize->width;
 262         }
 263
 264         if (resize->edges & WL_SHELL_SURFACE_RESIZE_TOP) {
 265                 height = resize->height + from_y - to_y;
 266         } else if (resize->edges & WL_SHELL_SURFACE_RESIZE_BOTTOM) {
 267                 height = resize->height + to_y - from_y;
 268         } else {
 269                 height = resize->height;
 270         }
 271
 272         wl_resource_post_event(&resize->shsurf->resource,
 273                                WL_SHELL_SURFACE_CONFIGURE, time, resize->edges,
 274                                width, height);
 275 }
 276
 277 static void
 278 resize_grab_button(struct wl_pointer_grab *grab,
 279                    uint32_t time, int32_t button, int32_t state)
 280 {
 281         struct wl_input_device *device = grab->input_device;
 282
 283         if (device->button_count == 0 && state == 0) {
 284                 wl_input_device_end_pointer_grab(device, time);
 285                 free(grab);
 286         }
 287 }
 288
 289 static const struct wl_pointer_grab_interface resize_grab_interface = {
 290         noop_grab_focus,
 291         resize_grab_motion,
 292         resize_grab_button,
 293 };
 294
 295 static int
 296 weston_surface_resize(struct shell_surface *shsurf,
 297                     struct weston_input_device *wd,
 298                     uint32_t time, uint32_t edges)
 299 {
 300         struct weston_resize_grab *resize;
 301
 302         /* FIXME: Reject if fullscreen */
 303
 304         if (edges == 0 || edges > 15 ||
 305             (edges & 3) == 3 || (edges & 12) == 12)
 306                 return 0;
 307
 308         resize = malloc(sizeof *resize);
 309         if (!resize)
 310                 return -1;
 311
 312         resize->grab.interface = &resize_grab_interface;
 313         resize->edges = edges;
 314         resize->width = shsurf->surface->geometry.width;
 315         resize->height = shsurf->surface->geometry.height;
 316         resize->shsurf = shsurf;
 317
 318         wl_input_device_start_pointer_grab(&wd->input_device, &resize->grab, time);
 319
 320         wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0);
 321
 322         return 0;
 323 }
 324
 325 static void
 326 shell_surface_resize(struct wl_client *client, struct wl_resource *resource,
 327                      struct wl_resource *input_resource, uint32_t time,
 328                      uint32_t edges)
 329 {
 330         struct weston_input_device *wd = input_resource->data;
 331         struct shell_surface *shsurf = resource->data;
 332
 333         /* FIXME: Reject if fullscreen */
 334
 335         if (wd->input_device.button_count == 0 ||
 336             wd->input_device.grab_time != time ||
 337             wd->input_device.pointer_focus != &shsurf->surface->surface)
 338                 return;
 339
 340         if (weston_surface_resize(shsurf, wd, time, edges) < 0)
 341                 wl_resource_post_no_memory(resource);
 342 }
 343
 344 static struct weston_output *
 345 get_default_output(struct weston_compositor *compositor)
 346 {
 347         return container_of(compositor->output_list.next,
 348                             struct weston_output, link);
 349 }
 350
 351 static int
 352 reset_shell_surface_type(struct shell_surface *surface)
 353 {
 354         switch (surface->type) {
 355         case SHELL_SURFACE_FULLSCREEN:
 356                 weston_surface_set_position(surface->surface,
 357                                             surface->saved_x,
 358                                             surface->saved_y);
 359                 surface->fullscreen_output = NULL;
 360                 break;
 361         case SHELL_SURFACE_MAXIMIZED:
 362                 surface->output = get_default_output(surface->surface->compositor);
 363                 weston_surface_set_position(surface->surface,
 364                                             surface->saved_x,
 365                                             surface->saved_y);
 366                 break;
 367         case SHELL_SURFACE_PANEL:
 368         case SHELL_SURFACE_BACKGROUND:
 369                 wl_list_remove(&surface->link);
 370                 wl_list_init(&surface->link);
 371                 break;
 372         case SHELL_SURFACE_SCREENSAVER:
 373         case SHELL_SURFACE_LOCK:
 374                 wl_resource_post_error(&surface->resource,
 375                                        WL_DISPLAY_ERROR_INVALID_METHOD,
 376                                        "cannot reassign surface type");
 377                 return -1;
 378         case SHELL_SURFACE_NONE:
 379         case SHELL_SURFACE_TOPLEVEL:
 380         case SHELL_SURFACE_TRANSIENT:
 381         case SHELL_SURFACE_POPUP:
 382                 break;
 383         }
 384
 385         surface->type = SHELL_SURFACE_NONE;
 386         return 0;
 387 }
 388
 389 static void
 390 shell_surface_set_toplevel(struct wl_client *client,
 391                            struct wl_resource *resource)
 392
 393 {
 394         struct shell_surface *surface = resource->data;
 395
 396         if (reset_shell_surface_type(surface))
 397                 return;
 398
 399         surface->type = SHELL_SURFACE_TOPLEVEL;
 400 }
 401
 402 static void
 403 shell_surface_set_transient(struct wl_client *client,
 404                             struct wl_resource *resource,
 405                             struct wl_resource *parent_resource,
 406                             int x, int y, uint32_t flags)
 407 {
 408         struct shell_surface *shsurf = resource->data;
 409         struct weston_surface *es = shsurf->surface;
 410         struct shell_surface *pshsurf = parent_resource->data;
 411         struct weston_surface *pes = pshsurf->surface;
 412
 413         if (reset_shell_surface_type(shsurf))
 414                 return;
 415
 416         /* assign to parents output  */
 417         es->output = pes->output;
 418         weston_surface_set_position(es, pes->geometry.x + x,
 419                                         pes->geometry.y + y);
 420
 421         shsurf->type = SHELL_SURFACE_TRANSIENT;
 422 }
 423
 424 static struct wl_shell *
 425 shell_surface_get_shell(struct shell_surface *shsurf)
 426 {
 427         struct weston_surface *es = shsurf->surface;
 428         struct weston_shell *shell = es->compositor->shell;
 429
 430         return (struct wl_shell *)container_of(shell, struct wl_shell, shell);
 431 }
 432
 433 static int
 434 get_output_panel_height(struct wl_shell *wlshell,struct weston_output *output)
 435 {
 436         struct shell_surface *priv;
 437         int panel_height = 0;
 438
 439         if (!output)
 440                 return 0;
 441
 442         wl_list_for_each(priv, &wlshell->panels, link) {
 443                 if (priv->output == output) {
 444                         panel_height = priv->surface->geometry.height;
 445                         break;
 446                 }
 447         }
 448         return panel_height;
 449 }
 450
 451 static void
 452 shell_surface_set_maximized(struct wl_client *client,
 453                             struct wl_resource *resource,
 454                             struct wl_resource *output_resource )
 455 {
 456         struct shell_surface *shsurf = resource->data;
 457         struct weston_surface *es = shsurf->surface;
 458         struct wl_shell *wlshell = NULL;
 459         uint32_t edges = 0, panel_height = 0;
 460
 461         /* get the default output, if the client set it as NULL
 462            check whether the ouput is available */
 463         if (output_resource)
 464                 shsurf->output = output_resource->data;
 465         else
 466                 shsurf->output = get_default_output(es->compositor);
 467
 468         if (reset_shell_surface_type(shsurf))
 469                 return;
 470
 471         shsurf->saved_x = es->geometry.x;
 472         shsurf->saved_y = es->geometry.y;
 473
 474         wlshell = shell_surface_get_shell(shsurf);
 475         panel_height = get_output_panel_height(wlshell, es->output);
 476         edges = WL_SHELL_SURFACE_RESIZE_TOP|WL_SHELL_SURFACE_RESIZE_LEFT;
 477         wl_resource_post_event(&shsurf->resource,
 478                                WL_SHELL_SURFACE_CONFIGURE,
 479                                weston_compositor_get_time(), edges,
 480                                es->output->current->width,
 481                                es->output->current->height - panel_height);
 482
 483         shsurf->type = SHELL_SURFACE_MAXIMIZED;
 484 }
 485
 486 static void
 487 shell_surface_set_fullscreen(struct wl_client *client,
 488                              struct wl_resource *resource,
 489                              uint32_t method,
 490                              uint32_t framerate,
 491                              struct wl_resource *output_resource)
 492 {
 493         struct shell_surface *shsurf = resource->data;
 494         struct weston_surface *es = shsurf->surface;
 495         struct weston_output *output;
 496
 497         if (reset_shell_surface_type(shsurf))
 498                 return;
 499
 500         /* FIXME: Fullscreen on first output */
 501         /* FIXME: Handle output going away */
 502         output = get_default_output(es->compositor);
 503         es->output = output;
 504
 505         shsurf->saved_x = es->geometry.x;
 506         shsurf->saved_y = es->geometry.y;
 507         shsurf->fullscreen_output = output;
 508         shsurf->type = SHELL_SURFACE_FULLSCREEN;
 509
 510         wl_resource_post_event(resource,
 511                                WL_SHELL_SURFACE_CONFIGURE,
 512                                weston_compositor_get_time(), 0,
 513                                es->output->current->width,
 514                                es->output->current->height);
 515 }
 516
 517 static void
 518 popup_grab_focus(struct wl_pointer_grab *grab, uint32_t time,
 519                  struct wl_surface *surface, int32_t x, int32_t y)
 520 {
 521         struct wl_input_device *device = grab->input_device;
 522         struct shell_surface *priv =
 523                 container_of(grab, struct shell_surface, popup.grab);
 524         struct wl_client *client = priv->surface->surface.resource.client;
 525
 526         if (surface && surface->resource.client == client) {
 527                 wl_input_device_set_pointer_focus(device, surface, time, x, y);
 528                 grab->focus = surface;
 529         } else {
 530                 wl_input_device_set_pointer_focus(device, NULL, time, 0, 0);
 531                 grab->focus = NULL;
 532         }
 533 }
 534
 535 static void
 536 popup_grab_motion(struct wl_pointer_grab *grab,
 537                   uint32_t time, int32_t sx, int32_t sy)
 538 {
 539         struct wl_resource *resource;
 540
 541         resource = grab->input_device->pointer_focus_resource;
 542         if (resource)
 543                 wl_resource_post_event(resource, WL_INPUT_DEVICE_MOTION,
 544                                        time, sx, sy);
 545 }
 546
 547 static void
 548 popup_grab_button(struct wl_pointer_grab *grab,
 549                   uint32_t time, int32_t button, int32_t state)
 550 {
 551         struct wl_resource *resource;
 552         struct shell_surface *shsurf =
 553                 container_of(grab, struct shell_surface, popup.grab);
 554
 555         resource = grab->input_device->pointer_focus_resource;
 556         if (resource) {
 557                 wl_resource_post_event(resource, WL_INPUT_DEVICE_BUTTON,
 558                                        time, button, state);
 559         } else if (state == 0 &&
 560                    (shsurf->popup.initial_up ||
 561                     time - shsurf->popup.time > 500)) {
 562                 wl_resource_post_event(&shsurf->resource,
 563                                        WL_SHELL_SURFACE_POPUP_DONE);
 564                 wl_input_device_end_pointer_grab(grab->input_device, time);
 565                 shsurf->popup.grab.input_device = NULL;
 566         }
 567
 568         if (state == 0)
 569                 shsurf->popup.initial_up = 1;
 570 }
 571
 572 static const struct wl_pointer_grab_interface popup_grab_interface = {
 573         popup_grab_focus,
 574         popup_grab_motion,
 575         popup_grab_button,
 576 };
 577
 578 static void
 579 shell_map_popup(struct shell_surface *shsurf, uint32_t time)
 580 {
 581         struct wl_input_device *device;
 582         struct weston_surface *es = shsurf->surface;
 583         struct weston_surface *parent = shsurf->parent->surface;
 584
 585         es->output = parent->output;
 586
 587         shsurf->popup.grab.interface = &popup_grab_interface;
 588         device = es->compositor->input_device;
 589
 590         weston_surface_update_transform(parent);
 591         if (parent->transform.enabled) {
 592                 shsurf->popup.parent_transform.matrix =
 593                         parent->transform.matrix;
 594         } else {
 595                 /* construct x, y translation matrix */
 596                 weston_matrix_init(&shsurf->popup.parent_transform.matrix);
 597                 shsurf->popup.parent_transform.matrix.d[12] =
 598                         parent->geometry.x;
 599                 shsurf->popup.parent_transform.matrix.d[13] =
 600                         parent->geometry.y;
 601         }
 602         wl_list_insert(es->geometry.transformation_list.prev,
 603                        &shsurf->popup.parent_transform.link);
 604         weston_surface_set_position(es, shsurf->popup.x, shsurf->popup.y);
 605
 606         shsurf->popup.grab.input_device = device;
 607         shsurf->popup.time = device->grab_time;
 608         shsurf->popup.initial_up = 0;
 609
 610         wl_input_device_start_pointer_grab(shsurf->popup.grab.input_device,
 611                                    &shsurf->popup.grab, shsurf->popup.time);
 612 }
 613
 614 static void
 615 shell_surface_set_popup(struct wl_client *client,
 616                         struct wl_resource *resource,
 617                         struct wl_resource *input_device_resource,
 618                         uint32_t time,
 619                         struct wl_resource *parent_resource,
 620                         int32_t x, int32_t y, uint32_t flags)
 621 {
 622         struct shell_surface *shsurf = resource->data;
 623
 624         shsurf->type = SHELL_SURFACE_POPUP;
 625         shsurf->parent = parent_resource->data;
 626         shsurf->popup.x = x;
 627         shsurf->popup.y = y;
 628 }
 629
 630 static const struct wl_shell_surface_interface shell_surface_implementation = {
 631         shell_surface_move,
 632         shell_surface_resize,
 633         shell_surface_set_toplevel,
 634         shell_surface_set_transient,
 635         shell_surface_set_fullscreen,
 636         shell_surface_set_popup,
 637         shell_surface_set_maximized
 638 };
 639
 640 static void
 641 destroy_shell_surface(struct wl_resource *resource)
 642 {
 643         struct shell_surface *shsurf = resource->data;
 644
 645         if (shsurf->popup.grab.input_device)
 646                 wl_input_device_end_pointer_grab(shsurf->popup.grab.input_device, 0);
 647
 648         /* in case cleaning up a dead client destroys shell_surface first */
 649         if (shsurf->surface)
 650                 wl_list_remove(&shsurf->surface_destroy_listener.link);
 651
 652         wl_list_remove(&shsurf->link);
 653         free(shsurf);
 654 }
 655
 656 static void
 657 shell_handle_surface_destroy(struct wl_listener *listener,
 658                              struct wl_resource *resource, uint32_t time)
 659 {
 660         struct shell_surface *shsurf = container_of(listener,
 661                                                     struct shell_surface,
 662                                                     surface_destroy_listener);
 663
 664         shsurf->surface = NULL;
 665         wl_resource_destroy(&shsurf->resource, time);
 666 }
 667
 668 static struct shell_surface *
 669 get_shell_surface(struct weston_surface *surface)
 670 {
 671         struct wl_list *lst = &surface->surface.resource.destroy_listener_list;
 672         struct wl_listener *listener;
 673
 674         /* search the destroy listener list for our callback */
 675         wl_list_for_each(listener, lst, link) {
 676                 if (listener->func == shell_handle_surface_destroy) {
 677                         return container_of(listener, struct shell_surface,
 678                                             surface_destroy_listener);
 679                 }
 680         }
 681
 682         return NULL;
 683 }
 684
 685 static void
 686 shell_get_shell_surface(struct wl_client *client,
 687                         struct wl_resource *resource,
 688                         uint32_t id,
 689                         struct wl_resource *surface_resource)
 690 {
 691         struct weston_surface *surface = surface_resource->data;
 692         struct shell_surface *shsurf;
 693
 694         if (get_shell_surface(surface)) {
 695                 wl_resource_post_error(surface_resource,
 696                         WL_DISPLAY_ERROR_INVALID_OBJECT,
 697                         "wl_shell::get_shell_surface already requested");
 698                 return;
 699         }
 700
 701         shsurf = calloc(1, sizeof *shsurf);
 702         if (!shsurf) {
 703                 wl_resource_post_no_memory(resource);
 704                 return;
 705         }
 706
 707         shsurf->resource.destroy = destroy_shell_surface;
 708         shsurf->resource.object.id = id;
 709         shsurf->resource.object.interface = &wl_shell_surface_interface;
 710         shsurf->resource.object.implementation =
 711                 (void (**)(void)) &shell_surface_implementation;
 712         shsurf->resource.data = shsurf;
 713
 714         shsurf->surface = surface;
 715         shsurf->surface_destroy_listener.func = shell_handle_surface_destroy;
 716         wl_list_insert(surface->surface.resource.destroy_listener_list.prev,
 717                        &shsurf->surface_destroy_listener.link);
 718
 719         /* init link so its safe to always remove it in destroy_shell_surface */
 720         wl_list_init(&shsurf->link);
 721
 722         /* empty when not in use */
 723         wl_list_init(&shsurf->rotation.transform.link);
 724         weston_matrix_init(&shsurf->rotation.rotation);
 725
 726         shsurf->type = SHELL_SURFACE_NONE;
 727
 728         wl_client_add_resource(client, &shsurf->resource);
 729 }
 730
 731 static const struct wl_shell_interface shell_implementation = {
 732         shell_get_shell_surface
 733 };
 734
 735 static void
 736 handle_screensaver_sigchld(struct weston_process *proc, int status)
 737 {
 738         proc->pid = 0;
 739 }
 740
 741 static void
 742 launch_screensaver(struct wl_shell *shell)
 743 {
 744         if (shell->screensaver.binding)
 745                 return;
 746
 747         if (!shell->screensaver.path)
 748                 return;
 749
 750         weston_client_launch(shell->compositor,
 751                            &shell->screensaver.process,
 752                            shell->screensaver.path,
 753                            handle_screensaver_sigchld);
 754 }
 755
 756 static void
 757 terminate_screensaver(struct wl_shell *shell)
 758 {
 759         if (shell->screensaver.process.pid == 0)
 760                 return;
 761
 762         kill(shell->screensaver.process.pid, SIGTERM);
 763 }
 764
 765 static void
 766 show_screensaver(struct wl_shell *shell, struct shell_surface *surface)
 767 {
 768         struct wl_list *list;
 769
 770         if (shell->lock_surface)
 771                 list = &shell->lock_surface->surface->link;
 772         else
 773                 list = &shell->compositor->surface_list;
 774
 775         wl_list_remove(&surface->surface->link);
 776         wl_list_insert(list, &surface->surface->link);
 777         surface->surface->output = surface->output;
 778         weston_surface_damage(surface->surface);
 779 }
 780
 781 static void
 782 hide_screensaver(struct wl_shell *shell, struct shell_surface *surface)
 783 {
 784         wl_list_remove(&surface->surface->link);
 785         wl_list_init(&surface->surface->link);
 786         surface->surface->output = NULL;
 787 }
 788
 789 static void
 790 desktop_shell_set_background(struct wl_client *client,
 791                              struct wl_resource *resource,
 792                              struct wl_resource *output_resource,
 793                              struct wl_resource *surface_resource)
 794 {
 795         struct wl_shell *shell = resource->data;
 796         struct shell_surface *shsurf = surface_resource->data;
 797         struct weston_surface *surface = shsurf->surface;
 798         struct shell_surface *priv;
 799
 800         if (reset_shell_surface_type(shsurf))
 801                 return;
 802
 803         wl_list_for_each(priv, &shell->backgrounds, link) {
 804                 if (priv->output == output_resource->data) {
 805                         priv->surface->output = NULL;
 806                         wl_list_remove(&priv->surface->link);
 807                         wl_list_remove(&priv->link);
 808                         break;
 809                 }
 810         }
 811
 812         shsurf->type = SHELL_SURFACE_BACKGROUND;
 813         shsurf->output = output_resource->data;
 814
 815         wl_list_insert(&shell->backgrounds, &shsurf->link);
 816
 817         weston_surface_set_position(surface, shsurf->output->x,
 818                                     shsurf->output->y);
 819
 820         wl_resource_post_event(resource,
 821                                DESKTOP_SHELL_CONFIGURE,
 822                                weston_compositor_get_time(), 0, surface_resource,
 823                                shsurf->output->current->width,
 824                                shsurf->output->current->height);
 825 }
 826
 827 static void
 828 desktop_shell_set_panel(struct wl_client *client,
 829                         struct wl_resource *resource,
 830                         struct wl_resource *output_resource,
 831                         struct wl_resource *surface_resource)
 832 {
 833         struct wl_shell *shell = resource->data;
 834         struct shell_surface *shsurf = surface_resource->data;
 835         struct weston_surface *surface = shsurf->surface;
 836         struct shell_surface *priv;
 837
 838         if (reset_shell_surface_type(shsurf))
 839                 return;
 840
 841         wl_list_for_each(priv, &shell->panels, link) {
 842                 if (priv->output == output_resource->data) {
 843                         priv->surface->output = NULL;
 844                         wl_list_remove(&priv->surface->link);
 845                         wl_list_remove(&priv->link);
 846                         break;
 847                 }
 848         }
 849
 850         shsurf->type = SHELL_SURFACE_PANEL;
 851         shsurf->output = output_resource->data;
 852
 853         wl_list_insert(&shell->panels, &shsurf->link);
 854
 855         weston_surface_set_position(surface, shsurf->output->x,
 856                                     shsurf->output->y);
 857
 858         wl_resource_post_event(resource,
 859                                DESKTOP_SHELL_CONFIGURE,
 860                                weston_compositor_get_time(), 0, surface_resource,
 861                                shsurf->output->current->width,
 862                                shsurf->output->current->height);
 863 }
 864
 865 static void
 866 handle_lock_surface_destroy(struct wl_listener *listener,
 867                             struct wl_resource *resource, uint32_t time)
 868 {
 869         struct wl_shell *shell =
 870                 container_of(listener, struct wl_shell, lock_surface_listener);
 871
 872         fprintf(stderr, "lock surface gone\n");
 873         shell->lock_surface = NULL;
 874 }
 875
 876 static void
 877 desktop_shell_set_lock_surface(struct wl_client *client,
 878                                struct wl_resource *resource,
 879                                struct wl_resource *surface_resource)
 880 {
 881         struct wl_shell *shell = resource->data;
 882         struct shell_surface *surface = surface_resource->data;
 883
 884         if (reset_shell_surface_type(surface))
 885                 return;
 886
 887         shell->prepare_event_sent = false;
 888
 889         if (!shell->locked)
 890                 return;
 891
 892         shell->lock_surface = surface;
 893
 894         shell->lock_surface_listener.func = handle_lock_surface_destroy;
 895         wl_list_insert(&surface_resource->destroy_listener_list,
 896                        &shell->lock_surface_listener.link);
 897
 898         shell->lock_surface->type = SHELL_SURFACE_LOCK;
 899 }
 900
 901 static void
 902 resume_desktop(struct wl_shell *shell)
 903 {
 904         struct weston_surface *surface;
 905         struct wl_list *list;
 906         struct shell_surface *tmp;
 907
 908         wl_list_for_each(tmp, &shell->screensaver.surfaces, link)
 909                 hide_screensaver(shell, tmp);
 910
 911         terminate_screensaver(shell);
 912
 913         wl_list_for_each(surface, &shell->hidden_surface_list, link)
 914                 weston_surface_assign_output(surface);
 915
 916         if (wl_list_empty(&shell->backgrounds)) {
 917                 list = &shell->compositor->surface_list;
 918         } else {
 919                 struct shell_surface *background;
 920                 background = container_of(shell->backgrounds.prev,
 921                                           struct shell_surface, link);
 922                 list = background->surface->link.prev;
 923         }
 924
 925         if (!wl_list_empty(&shell->hidden_surface_list))
 926                 wl_list_insert_list(list, &shell->hidden_surface_list);
 927         wl_list_init(&shell->hidden_surface_list);
 928
 929         shell->locked = false;
 930         weston_compositor_repick(shell->compositor);
 931         shell->compositor->idle_time = shell->compositor->option_idle_time;
 932         weston_compositor_wake(shell->compositor);
 933         weston_compositor_damage_all(shell->compositor);
 934 }
 935
 936 static void
 937 desktop_shell_unlock(struct wl_client *client,
 938                      struct wl_resource *resource)
 939 {
 940         struct wl_shell *shell = resource->data;
 941
 942         shell->prepare_event_sent = false;
 943
 944         if (shell->locked)
 945                 resume_desktop(shell);
 946 }
 947
 948 static const struct desktop_shell_interface desktop_shell_implementation = {
 949         desktop_shell_set_background,
 950         desktop_shell_set_panel,
 951         desktop_shell_set_lock_surface,
 952         desktop_shell_unlock
 953 };
 954
 955 static enum shell_surface_type
 956 get_shell_surface_type(struct weston_surface *surface)
 957 {
 958         struct shell_surface *shsurf;
 959
 960         shsurf = get_shell_surface(surface);
 961         if (!shsurf)
 962                 return SHELL_SURFACE_NONE;
 963         return shsurf->type;
 964 }
 965
 966 static void
 967 move_binding(struct wl_input_device *device, uint32_t time,
 968              uint32_t key, uint32_t button, uint32_t state, void *data)
 969 {
 970         struct weston_surface *surface =
 971                 (struct weston_surface *) device->pointer_focus;
 972
 973         if (surface == NULL)
 974                 return;
 975
 976         switch (get_shell_surface_type(surface)) {
 977                 case SHELL_SURFACE_PANEL:
 978                 case SHELL_SURFACE_BACKGROUND:
 979                 case SHELL_SURFACE_FULLSCREEN:
 980                 case SHELL_SURFACE_SCREENSAVER:
 981                         return;
 982                 default:
 983                         break;
 984         }
 985
 986         weston_surface_move(surface, (struct weston_input_device *) device, time);
 987 }
 988
 989 static void
 990 resize_binding(struct wl_input_device *device, uint32_t time,
 991                uint32_t key, uint32_t button, uint32_t state, void *data)
 992 {
 993         struct weston_surface *surface =
 994                 (struct weston_surface *) device->pointer_focus;
 995         uint32_t edges = 0;
 996         int32_t x, y;
 997         struct shell_surface *shsurf;
 998
 999         if (surface == NULL)
1000                 return;
1001
1002         shsurf = get_shell_surface(surface);
1003         if (!shsurf)
1004                 return;
1005
1006         switch (shsurf->type) {
1007                 case SHELL_SURFACE_PANEL:
1008                 case SHELL_SURFACE_BACKGROUND:
1009                 case SHELL_SURFACE_FULLSCREEN:
1010                 case SHELL_SURFACE_SCREENSAVER:
1011                         return;
1012                 default:
1013                         break;
1014         }
1015
1016         weston_surface_from_global(surface,
1017                                    device->grab_x, device->grab_y, &x, &y);
1018
1019         if (x < surface->geometry.width / 3)
1020                 edges |= WL_SHELL_SURFACE_RESIZE_LEFT;
1021         else if (x < 2 * surface->geometry.width / 3)
1022                 edges |= 0;
1023         else
1024                 edges |= WL_SHELL_SURFACE_RESIZE_RIGHT;
1025
1026         if (y < surface->geometry.height / 3)
1027                 edges |= WL_SHELL_SURFACE_RESIZE_TOP;
1028         else if (y < 2 * surface->geometry.height / 3)
1029                 edges |= 0;
1030         else
1031                 edges |= WL_SHELL_SURFACE_RESIZE_BOTTOM;
1032
1033         weston_surface_resize(shsurf, (struct weston_input_device *) device,
1034                             time, edges);
1035 }
1036
1037 static void
1038 terminate_binding(struct wl_input_device *device, uint32_t time,
1039                   uint32_t key, uint32_t button, uint32_t state, void *data)
1040 {
1041         struct weston_compositor *compositor = data;
1042
1043         if (state)
1044                 wl_display_terminate(compositor->wl_display);
1045 }
1046
1047 static void
1048 rotate_grab_motion(struct wl_pointer_grab *grab,
1049                  uint32_t time, int32_t x, int32_t y)
1050 {
1051         struct rotate_grab *rotate =
1052                 container_of(grab, struct rotate_grab, grab);
1053         struct wl_input_device *device = grab->input_device;
1054         struct shell_surface *surface = rotate->surface;
1055         GLfloat cx = 0.5f * surface->surface->geometry.width;
1056         GLfloat cy = 0.5f * surface->surface->geometry.height;
1057         GLfloat dx, dy;
1058         GLfloat r;
1059
1060         dx = device->x - rotate->center.x;
1061         dy = device->y - rotate->center.y;
1062         r = sqrtf(dx * dx + dy * dy);
1063
1064         wl_list_remove(&surface->rotation.transform.link);
1065         surface->surface->geometry.dirty = 1;
1066
1067         if (r > 20.0f) {
1068                 struct weston_matrix *matrix =
1069                         &surface->rotation.transform.matrix;
1070
1071                 weston_matrix_init(&rotate->rotation);
1072                 rotate->rotation.d[0] = dx / r;
1073                 rotate->rotation.d[4] = -dy / r;
1074                 rotate->rotation.d[1] = -rotate->rotation.d[4];
1075                 rotate->rotation.d[5] = rotate->rotation.d[0];
1076
1077                 weston_matrix_init(matrix);
1078                 weston_matrix_translate(matrix, -cx, -cy, 0.0f);
1079                 weston_matrix_multiply(matrix, &surface->rotation.rotation);
1080                 weston_matrix_multiply(matrix, &rotate->rotation);
1081                 weston_matrix_translate(matrix, cx, cy, 0.0f);
1082
1083                 wl_list_insert(
1084                         &surface->surface->geometry.transformation_list,
1085                         &surface->rotation.transform.link);
1086         } else {
1087                 wl_list_init(&surface->rotation.transform.link);
1088                 weston_matrix_init(&surface->rotation.rotation);
1089                 weston_matrix_init(&rotate->rotation);
1090         }
1091
1092         /* Repaint implies weston_surface_update_transform(), which
1093          * lazily applies the damage due to rotation update.
1094          */
1095         weston_compositor_schedule_repaint(surface->surface->compositor);
1096 }
1097
1098 static void
1099 rotate_grab_button(struct wl_pointer_grab *grab,
1100                  uint32_t time, int32_t button, int32_t state)
1101 {
1102         struct rotate_grab *rotate =
1103                 container_of(grab, struct rotate_grab, grab);
1104         struct wl_input_device *device = grab->input_device;
1105         struct shell_surface *surface = rotate->surface;
1106
1107         if (device->button_count == 0 && state == 0) {
1108                 weston_matrix_multiply(&surface->rotation.rotation,
1109                                        &rotate->rotation);
1110                 wl_input_device_end_pointer_grab(device, time);
1111                 free(rotate);
1112         }
1113 }
1114
1115 static const struct wl_pointer_grab_interface rotate_grab_interface = {
1116         noop_grab_focus,
1117         rotate_grab_motion,
1118         rotate_grab_button,
1119 };
1120
1121 static void
1122 rotate_binding(struct wl_input_device *device, uint32_t time,
1123                uint32_t key, uint32_t button, uint32_t state, void *data)
1124 {
1125         struct weston_surface *base_surface =
1126                 (struct weston_surface *) device->pointer_focus;
1127         struct shell_surface *surface;
1128         struct rotate_grab *rotate;
1129         GLfloat dx, dy;
1130         GLfloat r;
1131
1132         if (base_surface == NULL)
1133                 return;
1134
1135         surface = get_shell_surface(base_surface);
1136         if (!surface)
1137                 return;
1138
1139         switch (surface->type) {
1140                 case SHELL_SURFACE_PANEL:
1141                 case SHELL_SURFACE_BACKGROUND:
1142                 case SHELL_SURFACE_FULLSCREEN:
1143                 case SHELL_SURFACE_SCREENSAVER:
1144                         return;
1145                 default:
1146                         break;
1147         }
1148
1149         rotate = malloc(sizeof *rotate);
1150         if (!rotate)
1151                 return;
1152
1153         rotate->grab.interface = &rotate_grab_interface;
1154         rotate->surface = surface;
1155
1156         weston_surface_to_global(surface->surface,
1157                                  surface->surface->geometry.width / 2,
1158                                  surface->surface->geometry.height / 2,
1159                                  &rotate->center.x, &rotate->center.y);
1160
1161         wl_input_device_start_pointer_grab(device, &rotate->grab, time);
1162
1163         dx = device->x - rotate->center.x;
1164         dy = device->y - rotate->center.y;
1165         r = sqrtf(dx * dx + dy * dy);
1166         if (r > 20.0f) {
1167                 struct weston_matrix inverse;
1168
1169                 weston_matrix_init(&inverse);
1170                 inverse.d[0] = dx / r;
1171                 inverse.d[4] = dy / r;
1172                 inverse.d[1] = -inverse.d[4];
1173                 inverse.d[5] = inverse.d[0];
1174                 weston_matrix_multiply(&surface->rotation.rotation, &inverse);
1175         } else {
1176                 weston_matrix_init(&surface->rotation.rotation);
1177                 weston_matrix_init(&rotate->rotation);
1178         }
1179
1180         wl_input_device_set_pointer_focus(device, NULL, time, 0, 0);
1181 }
1182
1183 static void
1184 activate(struct weston_shell *base, struct weston_surface *es,
1185          struct weston_input_device *device, uint32_t time)
1186 {
1187         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1188         struct weston_compositor *compositor = shell->compositor;
1189         struct wl_list *list;
1190
1191         weston_surface_activate(es, device, time);
1192
1193         if (compositor->wxs)
1194                 weston_xserver_surface_activate(es);
1195
1196         switch (get_shell_surface_type(es)) {
1197         case SHELL_SURFACE_BACKGROUND:
1198                 /* put background back to bottom */
1199                 wl_list_remove(&es->link);
1200                 wl_list_insert(compositor->surface_list.prev, &es->link);
1201                 break;
1202         case SHELL_SURFACE_PANEL:
1203                 /* already put on top */
1204                 break;
1205         case SHELL_SURFACE_SCREENSAVER:
1206                 /* always below lock surface */
1207                 if (shell->lock_surface) {
1208                         wl_list_remove(&es->link);
1209                         wl_list_insert(&shell->lock_surface->surface->link,
1210                                        &es->link);
1211                 }
1212                 break;
1213         default:
1214                 if (!shell->locked) {
1215                         list = weston_compositor_top(compositor);
1216
1217                         /* bring panel back to top */
1218                         struct shell_surface *panel;
1219                         wl_list_for_each(panel, &shell->panels, link) {
1220                                 wl_list_remove(&panel->surface->link);
1221                                 wl_list_insert(list, &panel->surface->link);
1222                         }
1223                 }
1224         }
1225 }
1226
1227 static void
1228 click_to_activate_binding(struct wl_input_device *device,
1229                          uint32_t time, uint32_t key,
1230                           uint32_t button, uint32_t state, void *data)
1231 {
1232         struct weston_input_device *wd = (struct weston_input_device *) device;
1233         struct weston_compositor *compositor = data;
1234         struct weston_surface *focus;
1235
1236         focus = (struct weston_surface *) device->pointer_focus;
1237         if (state && focus && device->pointer_grab == &device->default_pointer_grab)
1238                 activate(compositor->shell, focus, wd, time);
1239 }
1240
1241 static void
1242 lock(struct weston_shell *base)
1243 {
1244         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1245         struct wl_list *surface_list = &shell->compositor->surface_list;
1246         struct weston_surface *cur;
1247         struct weston_surface *tmp;
1248         struct weston_input_device *device;
1249         struct shell_surface *shsurf;
1250         uint32_t time;
1251
1252         if (shell->locked)
1253                 return;
1254
1255         shell->locked = true;
1256
1257         /* Move all surfaces from compositor's list to our hidden list,
1258          * except the background. This way nothing else can show or
1259          * receive input events while we are locked. */
1260
1261         if (!wl_list_empty(&shell->hidden_surface_list)) {
1262                 fprintf(stderr,
1263                 "%s: Assertion failed: hidden_surface_list is not empty.\n",
1264                                                                 __func__);
1265         }
1266
1267         wl_list_for_each_safe(cur, tmp, surface_list, link) {
1268                 /* skip input device sprites, cur->surface is uninitialised */
1269                 if (cur->surface.resource.client == NULL)
1270                         continue;
1271
1272                 if (get_shell_surface_type(cur) == SHELL_SURFACE_BACKGROUND)
1273                         continue;
1274
1275                 cur->output = NULL;
1276                 wl_list_remove(&cur->link);
1277                 wl_list_insert(shell->hidden_surface_list.prev, &cur->link);
1278         }
1279
1280         launch_screensaver(shell);
1281
1282         wl_list_for_each(shsurf, &shell->screensaver.surfaces, link)
1283                 show_screensaver(shell, shsurf);
1284
1285         if (!wl_list_empty(&shell->screensaver.surfaces)) {
1286                 shell->compositor->idle_time = shell->screensaver.duration;
1287                 weston_compositor_wake(shell->compositor);
1288                 shell->compositor->state = WESTON_COMPOSITOR_IDLE;
1289         }
1290
1291         /* reset pointer foci */
1292         weston_compositor_repick(shell->compositor);
1293
1294         /* reset keyboard foci */
1295         time = weston_compositor_get_time();
1296         wl_list_for_each(device, &shell->compositor->input_device_list, link) {
1297                 wl_input_device_set_keyboard_focus(&device->input_device,
1298                                                    NULL, time);
1299         }
1300
1301         /* TODO: disable bindings that should not work while locked. */
1302
1303         /* All this must be undone in resume_desktop(). */
1304 }
1305
1306 static void
1307 unlock(struct weston_shell *base)
1308 {
1309         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1310
1311         if (!shell->locked || shell->lock_surface) {
1312                 weston_compositor_wake(shell->compositor);
1313                 return;
1314         }
1315
1316         /* If desktop-shell client has gone away, unlock immediately. */
1317         if (!shell->child.desktop_shell) {
1318                 resume_desktop(shell);
1319                 return;
1320         }
1321
1322         if (shell->prepare_event_sent)
1323                 return;
1324
1325         wl_resource_post_event(shell->child.desktop_shell,
1326                                DESKTOP_SHELL_PREPARE_LOCK_SURFACE);
1327         shell->prepare_event_sent = true;
1328 }
1329
1330 static void
1331 center_on_output(struct weston_surface *surface, struct weston_output *output)
1332 {
1333         struct weston_mode *mode = output->current;
1334         GLfloat x = (mode->width - surface->geometry.width) / 2;
1335         GLfloat y = (mode->height - surface->geometry.height) / 2;
1336
1337         weston_surface_set_position(surface, output->x + x, output->y + y);
1338 }
1339
1340 static void
1341 map(struct weston_shell *base, struct weston_surface *surface,
1342     int32_t width, int32_t height, int32_t sx, int32_t sy)
1343 {
1344         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1345         struct weston_compositor *compositor = shell->compositor;
1346         struct wl_list *list;
1347         struct shell_surface *shsurf;
1348         enum shell_surface_type surface_type = SHELL_SURFACE_NONE;
1349         int do_configure;
1350         int panel_height = 0;
1351
1352         shsurf = get_shell_surface(surface);
1353         if (shsurf)
1354                 surface_type = shsurf->type;
1355
1356         if (shell->locked) {
1357                 list = &shell->hidden_surface_list;
1358                 do_configure = 0;
1359         } else {
1360                 list = weston_compositor_top(compositor);
1361                 do_configure = 1;
1362         }
1363
1364         surface->geometry.width = width;
1365         surface->geometry.height = height;
1366         surface->geometry.dirty = 1;
1367
1368         weston_compositor_update_drag_surfaces(compositor);
1369
1370         /* initial positioning, see also configure() */
1371         switch (surface_type) {
1372         case SHELL_SURFACE_TOPLEVEL:
1373                 weston_surface_set_position(surface, 10 + random() % 400,
1374                                             10 + random() % 400);
1375                 break;
1376         case SHELL_SURFACE_SCREENSAVER:
1377         case SHELL_SURFACE_FULLSCREEN:
1378                 center_on_output(surface, shsurf->fullscreen_output);
1379                 break;
1380         case SHELL_SURFACE_MAXIMIZED:
1381                 /*use surface configure to set the geometry*/
1382                 panel_height = get_output_panel_height(shell,surface->output);
1383                 weston_surface_set_position(surface, surface->output->x,
1384                                             surface->output->y + panel_height);
1385                 break;
1386         case SHELL_SURFACE_LOCK:
1387                 center_on_output(surface, get_default_output(compositor));
1388                 break;
1389         case SHELL_SURFACE_POPUP:
1390                 shell_map_popup(shsurf, shsurf->popup.time);
1391         case SHELL_SURFACE_NONE:
1392                 weston_surface_set_position(surface,
1393                                             surface->geometry.x + sx,
1394                                             surface->geometry.y + sy);
1395                 break;
1396         default:
1397                 ;
1398         }
1399
1400         /* surface stacking order, see also activate() */
1401         switch (surface_type) {
1402         case SHELL_SURFACE_BACKGROUND:
1403                 /* background always visible, at the bottom */
1404                 wl_list_insert(compositor->surface_list.prev, &surface->link);
1405                 do_configure = 1;
1406                 break;
1407         case SHELL_SURFACE_PANEL:
1408                 /* panel always on top, hidden while locked */
1409                 wl_list_insert(list, &surface->link);
1410                 break;
1411         case SHELL_SURFACE_LOCK:
1412                 /* lock surface always visible, on top */
1413                 wl_list_insert(&compositor->surface_list, &surface->link);
1414
1415                 weston_compositor_wake(compositor);
1416                 do_configure = 1;
1417                 break;
1418         case SHELL_SURFACE_SCREENSAVER:
1419                 /* If locked, show it. */
1420                 if (shell->locked) {
1421                         show_screensaver(shell, shsurf);
1422                         compositor->idle_time = shell->screensaver.duration;
1423                         weston_compositor_wake(compositor);
1424                         if (!shell->lock_surface)
1425                                 compositor->state = WESTON_COMPOSITOR_IDLE;
1426                 }
1427                 do_configure = 0;
1428                 break;
1429         case SHELL_SURFACE_NONE:
1430                 break;
1431         default:
1432                 /* everything else just below the panel */
1433                 if (!wl_list_empty(&shell->panels)) {
1434                         struct shell_surface *panel =
1435                                 container_of(shell->panels.prev,
1436                                              struct shell_surface, link);
1437                         wl_list_insert(&panel->surface->link, &surface->link);
1438                 } else {
1439                         wl_list_insert(list, &surface->link);
1440                 }
1441         }
1442
1443         if (do_configure) {
1444                 weston_surface_assign_output(surface);
1445                 weston_compositor_repick(compositor);
1446                 if (surface_type == SHELL_SURFACE_MAXIMIZED)
1447                         surface->output = shsurf->output;
1448         }
1449
1450         switch (surface_type) {
1451         case SHELL_SURFACE_TOPLEVEL:
1452         case SHELL_SURFACE_TRANSIENT:
1453         case SHELL_SURFACE_FULLSCREEN:
1454         case SHELL_SURFACE_MAXIMIZED:
1455                 if (!shell->locked)
1456                         activate(base, surface,
1457                                  (struct weston_input_device *)
1458                                         compositor->input_device,
1459                                  weston_compositor_get_time());
1460                 break;
1461         default:
1462                 break;
1463         }
1464
1465         if (surface_type == SHELL_SURFACE_TOPLEVEL)
1466                 weston_zoom_run(surface, 0.8, 1.0, NULL, NULL);
1467 }
1468
1469 static void
1470 configure(struct weston_shell *base, struct weston_surface *surface,
1471           GLfloat x, GLfloat y, int32_t width, int32_t height)
1472 {
1473         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1474         enum shell_surface_type surface_type = SHELL_SURFACE_NONE;
1475         struct shell_surface *shsurf;
1476
1477         shsurf = get_shell_surface(surface);
1478         if (shsurf)
1479                 surface_type = shsurf->type;
1480
1481         surface->geometry.x = x;
1482         surface->geometry.y = y;
1483         surface->geometry.width = width;
1484         surface->geometry.height = height;
1485         surface->geometry.dirty = 1;
1486
1487         switch (surface_type) {
1488         case SHELL_SURFACE_SCREENSAVER:
1489         case SHELL_SURFACE_FULLSCREEN:
1490                 center_on_output(surface, shsurf->fullscreen_output);
1491                 break;
1492         case SHELL_SURFACE_MAXIMIZED:
1493                 /*setting x, y and using configure to change that geometry*/
1494                 surface->geometry.x = surface->output->x;
1495                 surface->geometry.y = surface->output->y +
1496                         get_output_panel_height(shell,surface->output);
1497                 break;
1498         default:
1499                 break;
1500         }
1501
1502         /*  XXX: would a fullscreen surface need the same handling? */
1503         if (surface->output) {
1504                 weston_surface_assign_output(surface);
1505
1506                 if (surface_type == SHELL_SURFACE_SCREENSAVER)
1507                         surface->output = shsurf->output;
1508                 else if (surface_type == SHELL_SURFACE_MAXIMIZED)
1509                         surface->output = shsurf->output;
1510         }
1511 }
1512
1513 static int launch_desktop_shell_process(struct wl_shell *shell);
1514
1515 static void
1516 desktop_shell_sigchld(struct weston_process *process, int status)
1517 {
1518         uint32_t time;
1519         struct wl_shell *shell =
1520                 container_of(process, struct wl_shell, child.process);
1521
1522         shell->child.process.pid = 0;
1523         shell->child.client = NULL; /* already destroyed by wayland */
1524
1525         /* if desktop-shell dies more than 5 times in 30 seconds, give up */
1526         time = weston_compositor_get_time();
1527         if (time - shell->child.deathstamp > 30000) {
1528                 shell->child.deathstamp = time;
1529                 shell->child.deathcount = 0;
1530         }
1531
1532         shell->child.deathcount++;
1533         if (shell->child.deathcount > 5) {
1534                 fprintf(stderr, "weston-desktop-shell died, giving up.\n");
1535                 return;
1536         }
1537
1538         fprintf(stderr, "weston-desktop-shell died, respawning...\n");
1539         launch_desktop_shell_process(shell);
1540 }
1541
1542 static int
1543 launch_desktop_shell_process(struct wl_shell *shell)
1544 {
1545         const char *shell_exe = LIBEXECDIR "/weston-desktop-shell";
1546
1547         shell->child.client = weston_client_launch(shell->compositor,
1548                                                  &shell->child.process,
1549                                                  shell_exe,
1550                                                  desktop_shell_sigchld);
1551
1552         if (!shell->child.client)
1553                 return -1;
1554         return 0;
1555 }
1556
1557 static void
1558 bind_shell(struct wl_client *client, void *data, uint32_t version, uint32_t id)
1559 {
1560         struct wl_shell *shell = data;
1561
1562         wl_client_add_object(client, &wl_shell_interface,
1563                              &shell_implementation, id, shell);
1564 }
1565
1566 static void
1567 unbind_desktop_shell(struct wl_resource *resource)
1568 {
1569         struct wl_shell *shell = resource->data;
1570
1571         if (shell->locked)
1572                 resume_desktop(shell);
1573
1574         shell->child.desktop_shell = NULL;
1575         shell->prepare_event_sent = false;
1576         free(resource);
1577 }
1578
1579 static void
1580 bind_desktop_shell(struct wl_client *client,
1581                    void *data, uint32_t version, uint32_t id)
1582 {
1583         struct wl_shell *shell = data;
1584         struct wl_resource *resource;
1585
1586         resource = wl_client_add_object(client, &desktop_shell_interface,
1587                                         &desktop_shell_implementation,
1588                                         id, shell);
1589
1590         if (client == shell->child.client) {
1591                 resource->destroy = unbind_desktop_shell;
1592                 shell->child.desktop_shell = resource;
1593                 return;
1594         }
1595
1596         wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
1597                                "permission to bind desktop_shell denied");
1598         wl_resource_destroy(resource, 0);
1599 }
1600
1601 static void
1602 screensaver_set_surface(struct wl_client *client,
1603                         struct wl_resource *resource,
1604                         struct wl_resource *shell_surface_resource,
1605                         struct wl_resource *output_resource)
1606 {
1607         struct wl_shell *shell = resource->data;
1608         struct shell_surface *surface = shell_surface_resource->data;
1609         struct weston_output *output = output_resource->data;
1610
1611         if (reset_shell_surface_type(surface))
1612                 return;
1613
1614         surface->type = SHELL_SURFACE_SCREENSAVER;
1615
1616         surface->fullscreen_output = output;
1617         surface->output = output;
1618         wl_list_insert(shell->screensaver.surfaces.prev, &surface->link);
1619 }
1620
1621 static const struct screensaver_interface screensaver_implementation = {
1622         screensaver_set_surface
1623 };
1624
1625 static void
1626 unbind_screensaver(struct wl_resource *resource)
1627 {
1628         struct wl_shell *shell = resource->data;
1629
1630         shell->screensaver.binding = NULL;
1631         free(resource);
1632 }
1633
1634 static void
1635 bind_screensaver(struct wl_client *client,
1636                  void *data, uint32_t version, uint32_t id)
1637 {
1638         struct wl_shell *shell = data;
1639         struct wl_resource *resource;
1640
1641         resource = wl_client_add_object(client, &screensaver_interface,
1642                                         &screensaver_implementation,
1643                                         id, shell);
1644
1645         if (shell->screensaver.binding == NULL) {
1646                 resource->destroy = unbind_screensaver;
1647                 shell->screensaver.binding = resource;
1648                 return;
1649         }
1650
1651         wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
1652                                "interface object already bound");
1653         wl_resource_destroy(resource, 0);
1654 }
1655
1656 static void
1657 shell_destroy(struct weston_shell *base)
1658 {
1659         struct wl_shell *shell = container_of(base, struct wl_shell, shell);
1660
1661         if (shell->child.client)
1662                 wl_client_destroy(shell->child.client);
1663
1664         free(shell->screensaver.path);
1665         free(shell);
1666 }
1667
1668 int
1669 shell_init(struct weston_compositor *ec);
1670
1671 WL_EXPORT int
1672 shell_init(struct weston_compositor *ec)
1673 {
1674         struct wl_shell *shell;
1675
1676         shell = malloc(sizeof *shell);
1677         if (shell == NULL)
1678                 return -1;
1679
1680         memset(shell, 0, sizeof *shell);
1681         shell->compositor = ec;
1682         shell->shell.lock = lock;
1683         shell->shell.unlock = unlock;
1684         shell->shell.map = map;
1685         shell->shell.configure = configure;
1686         shell->shell.destroy = shell_destroy;
1687
1688         wl_list_init(&shell->hidden_surface_list);
1689         wl_list_init(&shell->backgrounds);
1690         wl_list_init(&shell->panels);
1691         wl_list_init(&shell->screensaver.surfaces);
1692
1693         shell_configuration(shell);
1694
1695         if (wl_display_add_global(ec->wl_display, &wl_shell_interface,
1696                                   shell, bind_shell) == NULL)
1697                 return -1;
1698
1699         if (wl_display_add_global(ec->wl_display,
1700                                   &desktop_shell_interface,
1701                                   shell, bind_desktop_shell) == NULL)
1702                 return -1;
1703
1704         if (wl_display_add_global(ec->wl_display, &screensaver_interface,
1705                                   shell, bind_screensaver) == NULL)
1706                 return -1;
1707
1708         shell->child.deathstamp = weston_compositor_get_time();
1709         if (launch_desktop_shell_process(shell) != 0)
1710                 return -1;
1711
1712         weston_compositor_add_binding(ec, 0, BTN_LEFT, MODIFIER_SUPER,
1713                                     move_binding, shell);
1714         weston_compositor_add_binding(ec, 0, BTN_MIDDLE, MODIFIER_SUPER,
1715                                     resize_binding, shell);
1716         weston_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1717                                     MODIFIER_CTRL | MODIFIER_ALT,
1718                                     terminate_binding, ec);
1719         weston_compositor_add_binding(ec, 0, BTN_LEFT, 0,
1720                                     click_to_activate_binding, ec);
1721         weston_compositor_add_binding(ec, 0, BTN_LEFT,
1722                                       MODIFIER_SUPER | MODIFIER_ALT,
1723                                       rotate_binding, NULL);
1724
1725         ec->shell = &shell->shell;
1726
1727         return 0;
1728 }