clients/tablet-shell.c

   1 /*
   2  * Copyright © 2011, 2012 Intel Corporation
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <stdint.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/wait.h>
  29
  30 #include "window.h"
  31 #include "../shared/cairo-util.h"
  32 #include "../shared/config-parser.h"
  33
  34 #include "tablet-shell-client-protocol.h"
  35
  36 struct tablet {
  37         struct display *display;
  38         struct tablet_shell *tablet_shell;
  39         struct rectangle allocation;
  40         struct window *switcher;
  41
  42         struct homescreen *homescreen;
  43         struct lockscreen *lockscreen;
  44 };
  45
  46 struct homescreen {
  47         struct window *window;
  48         struct widget *widget;
  49         struct wl_list launcher_list;
  50 };
  51
  52 struct lockscreen {
  53         struct window *window;
  54         struct widget *widget;
  55 };
  56
  57 struct launcher {
  58         struct widget *widget;
  59         struct homescreen *homescreen;
  60         cairo_surface_t *icon;
  61         int focused, pressed;
  62         char *path;
  63         struct wl_list link;
  64 };
  65
  66 static char *key_lockscreen_icon;
  67 static char *key_lockscreen_background;
  68 static char *key_homescreen_background;
  69 static char *key_launcher_icon;
  70 static char *key_launcher_path;
  71 static void launcher_section_done(void *data);
  72
  73 static const struct config_key shell_config_keys[] = {
  74         { "lockscreen-icon", CONFIG_KEY_STRING, &key_lockscreen_icon },
  75         { "lockscreen", CONFIG_KEY_STRING, &key_lockscreen_background },
  76         { "homescreen", CONFIG_KEY_STRING, &key_homescreen_background },
  77 };
  78
  79 static const struct config_key launcher_config_keys[] = {
  80         { "icon", CONFIG_KEY_STRING, &key_launcher_icon },
  81         { "path", CONFIG_KEY_STRING, &key_launcher_path },
  82 };
  83
  84 static const struct config_section config_sections[] = {
  85         { "shell",
  86           shell_config_keys, ARRAY_LENGTH(shell_config_keys) },
  87         { "launcher",
  88           launcher_config_keys, ARRAY_LENGTH(launcher_config_keys),
  89           launcher_section_done }
  90 };
  91
  92 static void
  93 sigchild_handler(int s)
  94 {
  95         int status;
  96         pid_t pid;
  97
  98         while (pid = waitpid(-1, &status, WNOHANG), pid > 0)
  99                 fprintf(stderr, "child %d exited\n", pid);
 100 }
 101
 102 static void
 103 paint_background(cairo_t *cr, const char *path, struct rectangle *allocation)
 104 {
 105         cairo_surface_t *image = NULL;
 106         cairo_pattern_t *pattern;
 107         cairo_matrix_t matrix;
 108         double sx, sy;
 109
 110         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 111         if (path)
 112                 image = load_cairo_surface(path);
 113         if (image) {
 114                 pattern = cairo_pattern_create_for_surface(image);
 115                 sx = (double) cairo_image_surface_get_width(image) /
 116                         allocation->width;
 117                 sy = (double) cairo_image_surface_get_height(image) /
 118                         allocation->height;
 119                 cairo_matrix_init_scale(&matrix, sx, sy);
 120                 cairo_pattern_set_matrix(pattern, &matrix);
 121                 cairo_set_source(cr, pattern);
 122                 cairo_pattern_destroy (pattern);
 123                 cairo_surface_destroy(image);
 124                 cairo_paint(cr);
 125         } else {
 126                 fprintf(stderr, "couldn't load background image: %s\n", path);
 127                 cairo_set_source_rgb(cr, 0.2, 0, 0);
 128                 cairo_paint(cr);
 129         }
 130 }
 131
 132 static void
 133 homescreen_draw(struct widget *widget, void *data)
 134 {
 135         struct homescreen *homescreen = data;
 136         cairo_surface_t *surface;
 137         struct rectangle allocation;
 138         cairo_t *cr;
 139         struct launcher *launcher;
 140         const int rows = 4, columns = 5, icon_width = 128, icon_height = 128;
 141         int x, y, i, width, height, vmargin, hmargin, vpadding, hpadding;
 142
 143         surface = window_get_surface(homescreen->window);
 144         cr = cairo_create(surface);
 145
 146         widget_get_allocation(widget, &allocation);
 147         paint_background(cr, key_homescreen_background, &allocation);
 148
 149         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 150
 151         width = allocation.width - columns * icon_width;
 152         hpadding = width / (columns + 1);
 153         hmargin = (width - hpadding * (columns - 1)) / 2;
 154
 155         height = allocation.height - rows * icon_height;
 156         vpadding = height / (rows + 1);
 157         vmargin = (height - vpadding * (rows - 1)) / 2;
 158
 159         x = hmargin;
 160         y = vmargin;
 161         i = 0;
 162
 163         wl_list_for_each(launcher, &homescreen->launcher_list, link) {
 164                 widget_set_allocation(launcher->widget,
 165                                       x, y, icon_width, icon_height);
 166                 x += icon_width + hpadding;
 167                 i++;
 168                 if (i == columns) {
 169                         x = hmargin;
 170                         y += icon_height + vpadding;
 171                         i = 0;
 172                 }
 173         }
 174
 175         cairo_destroy(cr);
 176         cairo_surface_destroy(surface);
 177 }
 178
 179 static void
 180 lockscreen_draw(struct widget *widget, void *data)
 181 {
 182         struct lockscreen *lockscreen = data;
 183         cairo_surface_t *surface;
 184         cairo_surface_t *icon;
 185         struct rectangle allocation;
 186         cairo_t *cr;
 187         int width, height;
 188
 189         surface = window_get_surface(lockscreen->window);
 190         cr = cairo_create(surface);
 191
 192         widget_get_allocation(widget, &allocation);
 193         paint_background(cr, key_lockscreen_background, &allocation);
 194
 195         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 196         icon = load_cairo_surface(key_lockscreen_icon);
 197         if (icon) {
 198                 width = cairo_image_surface_get_width(icon);
 199                 height = cairo_image_surface_get_height(icon);
 200                 cairo_set_source_surface(cr, icon,
 201                         allocation.x + (allocation.width - width) / 2,
 202                         allocation.y + (allocation.height - height) / 2);
 203         } else {
 204                 fprintf(stderr, "couldn't load lockscreen icon: %s\n",
 205                                  key_lockscreen_icon);
 206                 cairo_set_source_rgb(cr, 0.2, 0, 0);
 207         }
 208         cairo_paint(cr);
 209         cairo_destroy(cr);
 210         cairo_surface_destroy(icon);
 211         cairo_surface_destroy(surface);
 212 }
 213
 214 static void
 215 lockscreen_button_handler(struct widget *widget,
 216                           struct input *input, uint32_t time,
 217                           uint32_t button,
 218                           enum wl_pointer_button_state state, void *data)
 219 {
 220         struct lockscreen *lockscreen = data;
 221
 222         if (state == WL_POINTER_BUTTON_STATE_PRESSED && lockscreen->window) {
 223                 window_destroy(lockscreen->window);
 224                 lockscreen->window = NULL;
 225         }
 226 }
 227
 228 static struct homescreen *
 229 homescreen_create(struct tablet *tablet)
 230 {
 231         struct homescreen *homescreen;
 232
 233         homescreen = malloc (sizeof *homescreen);
 234         memset(homescreen, 0, sizeof *homescreen);
 235
 236         homescreen->window = window_create_custom(tablet->display);
 237         homescreen->widget =
 238                 window_add_widget(homescreen->window, homescreen);
 239         window_set_user_data(homescreen->window, homescreen);
 240         window_set_title(homescreen->window, "homescreen");
 241         widget_set_redraw_handler(homescreen->widget, homescreen_draw);
 242
 243         return homescreen;
 244 }
 245
 246 static struct lockscreen *
 247 lockscreen_create(struct tablet *tablet)
 248 {
 249         struct lockscreen *lockscreen;
 250
 251         lockscreen = malloc (sizeof *lockscreen);
 252         memset(lockscreen, 0, sizeof *lockscreen);
 253
 254         lockscreen->window = window_create_custom(tablet->display);
 255         lockscreen->widget =
 256                 window_add_widget(lockscreen->window, lockscreen);
 257         window_set_user_data(lockscreen->window, lockscreen);
 258         window_set_title(lockscreen->window, "lockscreen");
 259         widget_set_redraw_handler(lockscreen->widget, lockscreen_draw);
 260         widget_set_button_handler(lockscreen->widget,
 261                                   lockscreen_button_handler);
 262
 263         return lockscreen;
 264 }
 265
 266 static void
 267 show_lockscreen(void *data, struct tablet_shell *tablet_shell)
 268 {
 269         struct tablet *tablet = data;
 270
 271         tablet->lockscreen = lockscreen_create(tablet);
 272         tablet_shell_set_lockscreen(tablet->tablet_shell,
 273                         window_get_wl_surface(tablet->lockscreen->window));
 274
 275         widget_schedule_resize(tablet->lockscreen->widget,
 276                                tablet->allocation.width,
 277                                tablet->allocation.height);
 278 }
 279
 280 static void
 281 show_switcher(void *data, struct tablet_shell *tablet_shell)
 282 {
 283         struct tablet *tablet = data;
 284
 285         tablet->switcher = window_create_custom(tablet->display);
 286         window_set_user_data(tablet->switcher, tablet);
 287         tablet_shell_set_switcher(tablet->tablet_shell,
 288                                   window_get_wl_surface(tablet->switcher));
 289 }
 290
 291 static void
 292 hide_switcher(void *data, struct tablet_shell *tablet_shell)
 293 {
 294 }
 295
 296 static const struct tablet_shell_listener tablet_shell_listener = {
 297         show_lockscreen,
 298         show_switcher,
 299         hide_switcher
 300 };
 301
 302 static int
 303 launcher_enter_handler(struct widget *widget, struct input *input,
 304                              float x, float y, void *data)
 305 {
 306         struct launcher *launcher = data;
 307
 308         launcher->focused = 1;
 309         widget_schedule_redraw(widget);
 310
 311         return CURSOR_LEFT_PTR;
 312 }
 313
 314 static void
 315 launcher_leave_handler(struct widget *widget,
 316                              struct input *input, void *data)
 317 {
 318         struct launcher *launcher = data;
 319
 320         launcher->focused = 0;
 321         widget_schedule_redraw(widget);
 322 }
 323
 324 static void
 325 launcher_activate(struct launcher *widget)
 326 {
 327         pid_t pid;
 328
 329         pid = fork();
 330         if (pid < 0) {
 331                 fprintf(stderr, "fork failed: %m\n");
 332                 return;
 333         }
 334
 335         if (pid)
 336                 return;
 337
 338         if (execl(widget->path, widget->path, NULL) < 0) {
 339                 fprintf(stderr, "execl '%s' failed: %m\n", widget->path);
 340                 exit(1);
 341         }
 342 }
 343
 344 static void
 345 launcher_button_handler(struct widget *widget,
 346                               struct input *input, uint32_t time,
 347                               uint32_t button,
 348                               enum wl_pointer_button_state state, void *data)
 349 {
 350         struct launcher *launcher;
 351
 352         launcher = widget_get_user_data(widget);
 353         widget_schedule_redraw(widget);
 354         if (state == WL_POINTER_BUTTON_STATE_RELEASED) {
 355                 launcher_activate(launcher);
 356                 launcher->pressed = 0;
 357         } else if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 358                 launcher->pressed = 1;
 359 }
 360
 361 static void
 362 launcher_redraw_handler(struct widget *widget, void *data)
 363 {
 364         struct launcher *launcher = data;
 365         cairo_surface_t *surface;
 366         struct rectangle allocation;
 367         cairo_t *cr;
 368
 369         surface = window_get_surface(launcher->homescreen->window);
 370         cr = cairo_create(surface);
 371
 372         widget_get_allocation(widget, &allocation);
 373         if (launcher->pressed) {
 374                 allocation.x++;
 375                 allocation.y++;
 376         }
 377
 378         cairo_set_source_surface(cr, launcher->icon,
 379                                  allocation.x, allocation.y);
 380         cairo_paint(cr);
 381
 382         if (launcher->focused) {
 383                 cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.4);
 384                 cairo_mask_surface(cr, launcher->icon,
 385                                    allocation.x, allocation.y);
 386         }
 387
 388         cairo_destroy(cr);
 389 }
 390
 391 static void
 392 tablet_shell_add_launcher(struct tablet *tablet,
 393                           const char *icon, const char *path)
 394 {
 395         struct launcher *launcher;
 396         struct homescreen *homescreen = tablet->homescreen;
 397
 398         launcher = malloc(sizeof *launcher);
 399         launcher->path = strdup(path);
 400         launcher->icon = load_cairo_surface(icon);
 401         if ( !launcher->icon ||
 402              cairo_surface_status (launcher->icon) != CAIRO_STATUS_SUCCESS) {
 403                 fprintf(stderr, "couldn't load %s\n", icon);
 404                 free(launcher);
 405                 return;
 406         }
 407
 408         launcher->homescreen = homescreen;
 409         launcher->widget = widget_add_widget(homescreen->widget, launcher);
 410         widget_set_enter_handler(launcher->widget,
 411                                  launcher_enter_handler);
 412         widget_set_leave_handler(launcher->widget,
 413                                  launcher_leave_handler);
 414         widget_set_button_handler(launcher->widget,
 415                                   launcher_button_handler);
 416         widget_set_redraw_handler(launcher->widget,
 417                                   launcher_redraw_handler);
 418
 419         wl_list_insert(&homescreen->launcher_list, &launcher->link);
 420 }
 421
 422 static void
 423 launcher_section_done(void *data)
 424 {
 425         struct tablet *tablet = data;
 426
 427         if (key_launcher_icon == NULL || key_launcher_path == NULL) {
 428                 fprintf(stderr, "invalid launcher section\n");
 429                 return;
 430         }
 431
 432         tablet_shell_add_launcher(tablet, key_launcher_icon, key_launcher_path);
 433
 434         free(key_launcher_icon);
 435         key_launcher_icon = NULL;
 436         free(key_launcher_path);
 437         key_launcher_path = NULL;
 438 }
 439
 440 static void
 441 global_handler(struct wl_display *display, uint32_t id,
 442                 const char *interface, uint32_t version, void *data)
 443 {
 444         struct tablet *tablet = data;
 445
 446         if (!strcmp(interface, "tablet_shell")) {
 447                 tablet->tablet_shell =
 448                         wl_display_bind(display, id, &tablet_shell_interface);
 449                 tablet_shell_add_listener(tablet->tablet_shell,
 450                                 &tablet_shell_listener, tablet);
 451         }
 452 }
 453
 454 int main(int argc, char *argv[])
 455 {
 456         struct tablet tablet = { 0 };
 457         struct display *display;
 458         char *config_file;
 459         struct output *output;
 460
 461         display = display_create(argc, argv);
 462         if (display == NULL) {
 463                 fprintf(stderr, "failed to create display: %m\n");
 464                 return -1;
 465         }
 466
 467         tablet.display = display;
 468
 469         wl_display_add_global_listener(display_get_display(tablet.display),
 470                         global_handler, &tablet);
 471
 472         tablet.homescreen = homescreen_create(&tablet);
 473         tablet_shell_set_homescreen(tablet.tablet_shell,
 474                         window_get_wl_surface(tablet.homescreen->window));
 475         wl_list_init(&tablet.homescreen->launcher_list);
 476
 477         config_file = config_file_path("weston.ini");
 478         parse_config_file(config_file,
 479                           config_sections, ARRAY_LENGTH(config_sections),
 480                           &tablet);
 481         free(config_file);
 482
 483         signal(SIGCHLD, sigchild_handler);
 484
 485         output = display_get_output(tablet.display);
 486         output_get_allocation(output, &tablet.allocation);
 487         widget_schedule_resize(tablet.homescreen->widget,
 488                         tablet.allocation.width,
 489                         tablet.allocation.height);
 490         display_run(display);
 491
 492         return 0;
 493 }