clients/desktop-shell.c

   1 /*
   2  * Copyright © 2011 Kristian Høgsberg
   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 <fcntl.h>
  28 #include <unistd.h>
  29 #include <math.h>
  30 #include <cairo.h>
  31 #include <sys/wait.h>
  32 #include <linux/input.h>
  33
  34 #include "wayland-client.h"
  35 #include "cairo-util.h"
  36 #include "window.h"
  37
  38 #include <desktop-shell-client-protocol.h>
  39
  40 struct desktop {
  41         struct display *display;
  42         struct desktop_shell *shell;
  43         struct panel *panel;
  44         struct window *background;
  45         const char *background_path;
  46 };
  47
  48 struct panel {
  49         struct window *window;
  50         struct window *menu;
  51 };
  52
  53 struct panel_item {
  54         struct item *item;
  55         struct panel *panel;
  56         cairo_surface_t *icon;
  57         int pressed;
  58         const char *path;
  59 };
  60
  61 static void
  62 sigchild_handler(int s)
  63 {
  64         int status;
  65         pid_t pid;
  66
  67         while (pid = waitpid(-1, &status, WNOHANG), pid > 0)
  68                 fprintf(stderr, "child %d exited\n", pid);
  69 }
  70
  71 static void
  72 show_menu(struct panel *panel, struct input *input)
  73 {
  74         int32_t x, y, width = 200, height = 200;
  75         struct display *display;
  76
  77         input_get_position(input, &x, &y);
  78         display = window_get_display(panel->window);
  79         panel->menu = window_create_transient(display, panel->window,
  80                                               x - 10, y - 10, width, height);
  81
  82         window_draw(panel->menu);
  83         window_flush(panel->menu);
  84 }
  85
  86 static void
  87 panel_activate_item(struct panel *panel, struct panel_item *item)
  88 {
  89         pid_t pid;
  90
  91         pid = fork();
  92         if (pid < 0) {
  93                 fprintf(stderr, "fork failed: %m\n");
  94                 return;
  95         }
  96
  97         if (pid)
  98                 return;
  99
 100         if (execl(item->path, item->path, NULL) < 0) {
 101                 fprintf(stderr, "execl failed: %m\n");
 102                 exit(1);
 103         }
 104 }
 105
 106 static void
 107 panel_draw_item(struct item *item, void *data)
 108 {
 109         cairo_t *cr = data;
 110         struct panel_item *pi;
 111         int x, y, width, height;
 112         double dx, dy;
 113
 114         pi = item_get_user_data(item);
 115         width = cairo_image_surface_get_width(pi->icon);
 116         height = cairo_image_surface_get_height(pi->icon);
 117         x = 0;
 118         y = -height / 2;
 119         if (pi->pressed) {
 120                 x++;
 121                 y++;
 122         }
 123
 124         dx = x;
 125         dy = y;
 126         cairo_user_to_device(cr, &dx, &dy);
 127         item_set_allocation(item, dx, dy, width, height);
 128
 129         cairo_set_source_surface(cr, pi->icon, x, y);
 130         cairo_paint(cr);
 131
 132         if (window_get_focus_item(pi->panel->window) == item) {
 133                 cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.4);
 134                 cairo_mask_surface(cr, pi->icon, x, y);
 135         }
 136
 137         cairo_translate(cr, width + 10, 0);
 138 }
 139
 140 static void
 141 panel_redraw_handler(struct window *window, void *data)
 142 {
 143         cairo_surface_t *surface;
 144         cairo_t *cr;
 145
 146         window_draw(window);
 147         surface = window_get_surface(window);
 148         cr = cairo_create(surface);
 149         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 150         cairo_set_source_rgba(cr, 0.1, 0.1, 0.1, 0.9);
 151         cairo_paint(cr);
 152
 153         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 154         cairo_translate(cr, 10, 32 / 2);
 155         window_for_each_item(window, panel_draw_item, cr);
 156
 157         cairo_destroy(cr);
 158         cairo_surface_destroy(surface);
 159         window_flush(window);
 160 }
 161
 162 static void
 163 panel_item_focus_handler(struct window *window,
 164                          struct item *focus, void *data)
 165 {
 166         window_schedule_redraw(window);
 167 }
 168
 169 static void
 170 panel_button_handler(struct window *window,
 171                      struct input *input, uint32_t time,
 172                      int button, int state, void *data)
 173 {
 174         struct panel *panel = data;
 175         struct panel_item *pi;
 176         struct item *focus;
 177
 178         focus = window_get_focus_item(panel->window);
 179         if (focus && button == BTN_LEFT) {
 180                 pi = item_get_user_data(focus);
 181                 window_schedule_redraw(panel->window);
 182                 if (state == 0)
 183                         panel_activate_item(panel, pi);
 184         } else if (button == BTN_RIGHT) {
 185                 if (state)
 186                         show_menu(panel, input);
 187                 else
 188                         window_destroy(panel->menu);
 189         }
 190 }
 191
 192 static struct panel *
 193 panel_create(struct display *display)
 194 {
 195         struct panel *panel;
 196
 197         panel = malloc(sizeof *panel);
 198         memset(panel, 0, sizeof *panel);
 199
 200         panel->window = window_create(display, 0, 0);
 201
 202         window_set_title(panel->window, "panel");
 203         window_set_decoration(panel->window, 0);
 204         window_set_redraw_handler(panel->window, panel_redraw_handler);
 205         window_set_custom(panel->window);
 206         window_set_user_data(panel->window, panel);
 207         window_set_button_handler(panel->window, panel_button_handler);
 208         window_set_item_focus_handler(panel->window, panel_item_focus_handler);
 209
 210         return panel;
 211 }
 212
 213 static void
 214 panel_add_item(struct panel *panel, const char *icon, const char *path)
 215 {
 216         struct panel_item *item;
 217
 218         item = malloc(sizeof *item);
 219         memset(item, 0, sizeof *item);
 220         item->icon = cairo_image_surface_create_from_png(icon);
 221         item->path = strdup(path);
 222         item->panel = panel;
 223         window_add_item(panel->window, item);
 224 }
 225
 226 static void
 227 background_draw(struct window *window, int width, int height, const char *path)
 228 {
 229         cairo_surface_t *surface, *image;
 230         cairo_pattern_t *pattern;
 231         cairo_matrix_t matrix;
 232         cairo_t *cr;
 233         double sx, sy;
 234
 235         window_set_child_size(window, width, height);
 236         window_draw(window);
 237         surface = window_get_surface(window);
 238
 239         cr = cairo_create(surface);
 240         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 241         cairo_set_source_rgba(cr, 0.0, 0.0, 0.2, 1.0);
 242         cairo_paint(cr);
 243
 244         if (path) {
 245                 image = load_jpeg(path);
 246                 pattern = cairo_pattern_create_for_surface(image);
 247                 sx = (double) cairo_image_surface_get_width(image) / width;
 248                 sy = (double) cairo_image_surface_get_height(image) / height;
 249                 cairo_matrix_init_scale(&matrix, sx, sy);
 250                 cairo_pattern_set_matrix(pattern, &matrix);
 251                 cairo_set_source(cr, pattern);
 252                 cairo_pattern_destroy (pattern);
 253                 cairo_paint(cr);
 254                 cairo_surface_destroy(image);
 255         }
 256
 257         cairo_destroy(cr);
 258         cairo_surface_destroy(surface);
 259         window_flush(window);
 260 }
 261
 262 static void
 263 desktop_shell_configure(void *data,
 264                         struct desktop_shell *desktop_shell,
 265                         uint32_t time, uint32_t edges,
 266                         struct wl_surface *surface,
 267                         int32_t width, int32_t height)
 268 {
 269         struct desktop *desktop = data;
 270
 271         if (surface == window_get_wl_surface(desktop->panel->window)) {
 272                 window_set_child_size(desktop->panel->window, width, 32);
 273                 window_schedule_redraw(desktop->panel->window);
 274         } else if (surface == window_get_wl_surface(desktop->background)) {
 275                 background_draw(desktop->background,
 276                                 width, height, desktop->background_path);
 277         }
 278 }
 279
 280 static const struct desktop_shell_listener listener = {
 281         desktop_shell_configure
 282 };
 283
 284 static void
 285 global_handler(struct wl_display *display, uint32_t id,
 286                const char *interface, uint32_t version, void *data)
 287 {
 288         struct desktop *desktop = data;
 289
 290         if (!strcmp(interface, "desktop_shell")) {
 291                 desktop->shell =
 292                         wl_display_bind(display, id, &desktop_shell_interface);
 293                 desktop_shell_add_listener(desktop->shell, &listener, desktop);
 294         }
 295 }
 296
 297 static const struct {
 298         const char *icon;
 299         const char *path;
 300 } launchers[] = {
 301         {
 302                 "/usr/share/icons/gnome/24x24/apps/utilities-terminal.png",
 303                 "/usr/bin/gnome-terminal"
 304         },
 305         {
 306                 "/usr/share/icons/gnome/24x24/apps/utilities-terminal.png",
 307                 "./clients/terminal"
 308         },
 309         {
 310                 "/usr/share/icons/hicolor/24x24/apps/google-chrome.png",
 311                 "/usr/bin/google-chrome"
 312         },
 313 };
 314
 315 int main(int argc, char *argv[])
 316 {
 317         struct desktop desktop;
 318         int i;
 319
 320         desktop.display = display_create(&argc, &argv, NULL);
 321         if (desktop.display == NULL) {
 322                 fprintf(stderr, "failed to create display: %m\n");
 323                 return -1;
 324         }
 325
 326         wl_display_add_global_listener(display_get_display(desktop.display),
 327                                        global_handler, &desktop);
 328
 329         desktop.panel = panel_create(desktop.display);
 330
 331         for (i = 0; i < ARRAY_LENGTH(launchers); i++)
 332                 panel_add_item(desktop.panel,
 333                                launchers[i].icon, launchers[i].path);
 334
 335         desktop_shell_set_panel(desktop.shell,
 336                                 window_get_wl_surface(desktop.panel->window));
 337
 338         desktop.background = window_create(desktop.display, 0, 0);
 339         window_set_decoration(desktop.background, 0);
 340         window_set_custom(desktop.background);
 341         desktop.background_path = argv[1];
 342         desktop_shell_set_background(desktop.shell,
 343                                      window_get_wl_surface(desktop.background));
 344
 345         signal(SIGCHLD, sigchild_handler);
 346
 347         display_run(desktop.display);
 348
 349         return 0;
 350 }