628feea53d9ad32183cffd5c021a7e484b2b08b2
[lxde/lxpanel.git] / src / plugins / taskbar.c
1 /**
2 * Copyright (c) 2006 LxDE Developers, see the file AUTHORS for details.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdlib.h>
23
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26
27 #include <gdk-pixbuf/gdk-pixbuf.h>
28 #include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h>
29 #include <gdk/gdk.h>
30 #include <glib/gi18n.h>
31
32 #include "panel.h"
33 #include "misc.h"
34 #include "plugin.h"
35 #include "icon.xpm"
36 #include "gtkbar.h"
37 #include "icon-grid.h"
38
39 /*
40 * 2006.09.10 modified by Hong Jen Yee (PCMan) pcman.tw (AT) gmail.com
41 * Following features are added:
42 * 1. Add XUrgencyHint support. (Flashing task bar buttons, can be disabled)
43 * 2. Raise window when files get dragged over taskbar buttons.
44 * 3. Add Restore & Maximize menu items to popup menu of task bar buttons.
45 */
46
47 #include "dbg.h"
48
49 struct _taskbar;
50 struct _task_class;
51 struct _task;
52
53 /* Structure representing a class. This comes from WM_CLASS, and should identify windows that come from an application. */
54 typedef struct _task_class {
55 struct _task_class * res_class_flink; /* Forward link */
56 char * res_class; /* Class name */
57 struct _task * res_class_head; /* Head of list of tasks with this class */
58 struct _task * visible_task; /* Task that is visible in current desktop, if any */
59 char * visible_name; /* Name that will be visible for grouped tasks */
60 int visible_count; /* Count of tasks that are visible in current desktop */
61 } TaskClass;
62
63 /* Structure representing a "task", an open window. */
64 typedef struct _task {
65 struct _task * task_flink; /* Forward link to next task in X window ID order */
66 struct _taskbar * tb; /* Back pointer to taskbar */
67 Window win; /* X window ID */
68 char * name; /* Taskbar label when normal, from WM_NAME or NET_WM_NAME */
69 char * name_iconified; /* Taskbar label when iconified */
70 Atom name_source; /* Atom that is the source of taskbar label */
71 TaskClass * res_class; /* Class, from WM_CLASS */
72 struct _task * res_class_flink; /* Forward link to task in same class */
73 GtkWidget * button; /* Button representing task in taskbar */
74 GtkWidget * image; /* Icon for task, child of button */
75 Atom image_source; /* Atom that is the source of taskbar icon */
76 GtkWidget * label; /* Label for task, child of button */
77 int desktop; /* Desktop that contains task, needed to switch to it on Raise */
78 guint flash_timeout; /* Timer for urgency notification */
79 unsigned int focused : 1; /* True if window has focus */
80 unsigned int iconified : 1; /* True if window is iconified, from WM_STATE */
81 unsigned int urgency : 1; /* True if window has an urgency hint, from WM_HINTS */
82 unsigned int flash_state : 1; /* One-bit counter to flash taskbar */
83 unsigned int entered_state : 1; /* True if cursor is inside taskbar button */
84 unsigned int present_in_client_list : 1; /* State during WM_CLIENT_LIST processing to detect deletions */
85 } Task;
86
87 /* Private context for taskbar plugin. */
88 typedef struct _taskbar {
89 Plugin * plug; /* Back pointer to Plugin */
90 Task * task_list; /* List of tasks to be displayed in taskbar */
91 TaskClass * res_class_list; /* Window class list */
92 IconGrid * icon_grid; /* Manager for taskbar buttons */
93 GtkWidget * menu; /* Popup menu for task control (Close, Raise, etc.) */
94 GtkWidget * group_menu; /* Popup menu for grouping selection */
95 GdkPixbuf * fallback_pixbuf; /* Fallback task icon when none is available */
96 int number_of_desktops; /* Number of desktops, from NET_WM_NUMBER_OF_DESKTOPS */
97 int current_desktop; /* Current desktop, from NET_WM_CURRENT_DESKTOP */
98 Task * focused; /* Task that has focus */
99 Task * focused_previous; /* Task that had focus just before panel got it */
100 Task * menutask; /* Task for which popup menu is open */
101 guint dnd_delay_timer; /* Timer for drag and drop delay */
102 int icon_size; /* Size of task icons */
103 gboolean show_all_desks; /* User preference: show windows from all desktops */
104 gboolean tooltips; /* User preference: show tooltips */
105 gboolean icons_only; /* User preference: show icons only, omit name */
106 gboolean use_mouse_wheel; /* User preference: scroll wheel does iconify and raise */
107 gboolean use_urgency_hint; /* User preference: windows with urgency will flash */
108 gboolean flat_button; /* User preference: taskbar buttons have visible background */
109 gboolean grouped_tasks; /* User preference: windows from same task are grouped onto a single button */
110 int task_width_max; /* Maximum width of a taskbar button in horizontal orientation */
111 int spacing; /* Spacing between taskbar buttons */
112 gboolean use_net_active; /* NET_WM_ACTIVE_WINDOW is supported by the window manager */
113 } TaskbarPlugin;
114
115 static gchar *taskbar_rc = "style 'taskbar-style'\n"
116 "{\n"
117 "GtkWidget::focus-padding=0\n" /* FIXME: seem to fix #2821771, not sure if this is ok. */
118 "GtkWidget::focus-line-width=0\n"
119 "GtkWidget::focus-padding=0\n"
120 "GtkButton::default-border={0,0,0,0}\n"
121 "GtkButton::default-outside-border={0,0,0,0}\n"
122 "GtkButton::inner-border={0,0,0,0}\n" /* added in gtk+ 2.10 */
123 "}\n"
124 "widget '*.taskbar.*' style 'taskbar-style'";
125
126 #define DRAG_ACTIVE_DELAY 1000
127 #define TASK_WIDTH_MAX 200
128 #define TASK_PADDING 4
129 #define ALL_WORKSPACES (-1)
130 #define ICON_ONLY_EXTRA 6 /* Amount needed to have button lay out symmetrically */
131 #define BUTTON_HEIGHT_EXTRA 4 /* Amount needed to have button not clip icon */
132
133 static void set_timer_on_task(Task * tk);
134 static gboolean task_is_visible_on_current_desktop(TaskbarPlugin * tb, Task * tk);
135 static void recompute_group_visibility_for_class(TaskbarPlugin * tb, TaskClass * tc);
136 static void recompute_group_visibility_on_current_desktop(TaskbarPlugin * tb);
137 static void task_draw_label(Task * tk);
138 static gboolean task_is_visible(TaskbarPlugin * tb, Task * tk);
139 static void task_button_redraw(Task * tk, TaskbarPlugin * tb);
140 static void taskbar_redraw(TaskbarPlugin * tb);
141 static gboolean accept_net_wm_state(NetWMState * nws);
142 static gboolean accept_net_wm_window_type(NetWMWindowType * nwwt);
143 static void task_free_names(Task * tk);
144 static void task_set_names(Task * tk, Atom source);
145 static void task_unlink_class(Task * tk);
146 static TaskClass * taskbar_enter_res_class(TaskbarPlugin * tb, char * res_class, gboolean * name_consumed);
147 static void task_set_class(Task * tk);
148 static Task * task_lookup(TaskbarPlugin * tb, Window win);
149 static void task_delete(TaskbarPlugin * tb, Task * tk, gboolean unlink);
150 static GdkColormap * get_colormap_from_pixmap(GdkPixmap * pixmap);
151 static GdkPixbuf * _wnck_gdk_pixbuf_get_from_pixmap(
152 GdkPixbuf * dest, Pixmap xpixmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height);
153 static GdkPixbuf * apply_mask(GdkPixbuf * pixbuf, GdkPixbuf * mask);
154 static GdkPixbuf * get_wm_icon(Window task_win, int required_width, int required_height, Atom source, Atom * current_source);
155 static GdkPixbuf * task_update_icon(TaskbarPlugin * tb, Task * tk, Atom source);
156 static gboolean flash_window_timeout(Task * tk);
157 static void task_set_urgency(Task * tk);
158 static void task_clear_urgency(Task * tk);
159 static void task_raise_window(Task * tk, guint32 time);
160 static void taskbar_popup_set_position(GtkWidget * menu, gint * px, gint * py, gboolean * push_in, gpointer data);
161 static void task_group_menu_destroy(TaskbarPlugin * tb);
162 static gboolean taskbar_task_control_event(GtkWidget * widget, GdkEventButton * event, Task * tk, gboolean popup_menu);
163 static gboolean taskbar_button_press_event(GtkWidget * widget, GdkEventButton * event, Task * tk);
164 static gboolean taskbar_popup_activate_event(GtkWidget * widget, GdkEventButton * event, Task * tk);
165 static gboolean taskbar_button_drag_motion_timeout(Task * tk);
166 static gboolean taskbar_button_drag_motion(GtkWidget * widget, GdkDragContext * drag_context, gint x, gint y, guint time, Task * tk);
167 static void taskbar_button_enter(GtkWidget * widget, Task * tk);
168 static void taskbar_button_leave(GtkWidget * widget, Task * tk);
169 static gboolean taskbar_button_scroll_event(GtkWidget * widget, GdkEventScroll * event, Task * tk);
170 static void taskbar_button_size_allocate(GtkWidget * btn, GtkAllocation * alloc, Task * tk);
171 static void taskbar_update_style(TaskbarPlugin * tb);
172 static void task_update_style(Task * tk, TaskbarPlugin * tb);
173 static void task_build_gui(TaskbarPlugin * tb, Task * tk);
174 static void taskbar_net_client_list(GtkWidget * widget, TaskbarPlugin * tb);
175 static void taskbar_net_current_desktop(GtkWidget * widget, TaskbarPlugin * tb);
176 static void taskbar_net_number_of_desktops(GtkWidget * widget, TaskbarPlugin * tb);
177 static void taskbar_net_active_window(GtkWidget * widget, TaskbarPlugin * tb);
178 static gboolean task_has_urgency(Task * tk);
179 static void taskbar_property_notify_event(TaskbarPlugin * tb, XEvent *ev);
180 static GdkFilterReturn taskbar_event_filter(XEvent * xev, GdkEvent * event, TaskbarPlugin * tb);
181 static void menu_raise_window(GtkWidget * widget, TaskbarPlugin * tb);
182 static void menu_restore_window(GtkWidget * widget, TaskbarPlugin * tb);
183 static void menu_maximize_window(GtkWidget * widget, TaskbarPlugin * tb);
184 static void menu_iconify_window(GtkWidget * widget, TaskbarPlugin * tb);
185 static void menu_move_to_workspace(GtkWidget * widget, TaskbarPlugin * tb);
186 static void menu_close_window(GtkWidget * widget, TaskbarPlugin * tb);
187 static void taskbar_make_menu(TaskbarPlugin * tb);
188 static void taskbar_build_gui(Plugin * p);
189 static gboolean net_active_supported(void);
190 static int taskbar_constructor(Plugin * p, char ** fp);
191 static void taskbar_destructor(Plugin * p);
192 static void taskbar_apply_configuration(Plugin * p);
193 static void taskbar_configure(Plugin * p, GtkWindow * parent);
194 static void taskbar_save_configuration(Plugin * p, FILE * fp);
195 static void taskbar_panel_configuration_changed(Plugin * p);
196
197 /* Set an urgency timer on a task. */
198 static void set_timer_on_task(Task * tk)
199 {
200 gint interval;
201 g_object_get(gtk_widget_get_settings(tk->button), "gtk-cursor-blink-time", &interval, NULL);
202 tk->flash_timeout = g_timeout_add(interval, (GSourceFunc) flash_window_timeout, tk);
203 }
204
205 /* Determine if a task is visible considering only its desktop placement. */
206 static gboolean task_is_visible_on_current_desktop(TaskbarPlugin * tb, Task * tk)
207 {
208 return ((tk->desktop == ALL_WORKSPACES) || (tk->desktop == tb->current_desktop) || (tb->show_all_desks));
209 }
210
211 /* Recompute the visible task for a class when the class membership changes.
212 * Also transfer the urgency state to the visible task if necessary. */
213 static void recompute_group_visibility_for_class(TaskbarPlugin * tb, TaskClass * tc)
214 {
215 tc->visible_count = 0;
216 tc->visible_task = NULL;
217 tc->visible_name = NULL;
218 Task * flashing_task = NULL;
219 gboolean class_has_urgency = FALSE;
220 Task * tk;
221 for (tk = tc->res_class_head; tk != NULL; tk = tk->res_class_flink)
222 {
223 if (task_is_visible_on_current_desktop(tb, tk))
224 {
225 /* Count visible tasks and make the first visible task the one that is used for display. */
226 if (tc->visible_count == 0)
227 tc->visible_task = tk;
228 tc->visible_count += 1;
229
230 /* Compute summary bit for urgency anywhere in the class. */
231 if (tk->urgency)
232 class_has_urgency = TRUE;
233
234 /* If there is urgency, record the currently flashing task. */
235 if (tk->flash_timeout != 0)
236 flashing_task = tk;
237
238 /* Compute the visible name. If all visible windows have the same title, use that.
239 * Otherwise, use the class name. This follows WNCK.
240 * Note that the visible name is not a separate string, but is set to point to one of the others. */
241 if (tc->visible_name == NULL)
242 tc->visible_name = tk->name;
243 else if ((tc->visible_name != tc->res_class)
244 && (tc->visible_name != NULL) && (tk->name != NULL)
245 && (strcmp(tc->visible_name, tk->name) != 0))
246 tc->visible_name = tc->res_class;
247 }
248 }
249
250 /* Transfer the flash timeout to the visible task. */
251 if (class_has_urgency)
252 {
253 if (flashing_task == NULL)
254 {
255 /* Set the flashing context and flash the window immediately. */
256 tc->visible_task->flash_state = TRUE;
257 flash_window_timeout(tc->visible_task);
258
259 /* Set the timer, since none is set. */
260 set_timer_on_task(tc->visible_task);
261 }
262 else if (flashing_task != tc->visible_task)
263 {
264 /* Reset the timer on the new representative.
265 * There will be a slight hiccup on the flash cadence. */
266 g_source_remove(flashing_task->flash_timeout);
267 flashing_task->flash_timeout = 0;
268 tc->visible_task->flash_state = flashing_task->flash_state;
269 flashing_task->flash_state = FALSE;
270 set_timer_on_task(tc->visible_task);
271 }
272 }
273 else
274 {
275 /* No task has urgency. Cancel the timer if one is set. */
276 if (flashing_task != NULL)
277 {
278 g_source_remove(flashing_task->flash_timeout);
279 flashing_task->flash_state = FALSE;
280 }
281 }
282 }
283
284 /* Recompute the visible task for all classes when the desktop changes. */
285 static void recompute_group_visibility_on_current_desktop(TaskbarPlugin * tb)
286 {
287 TaskClass * tc;
288 for (tc = tb->res_class_list; tc != NULL; tc = tc->res_class_flink)
289 {
290 recompute_group_visibility_for_class(tb, tc);
291 }
292 }
293
294 /* Draw the label and tooltip on a taskbar button. */
295 static void task_draw_label(Task * tk)
296 {
297 TaskClass * tc = tk->res_class;
298 if ((tk->tb->grouped_tasks) && (tc != NULL) && (tc->visible_task == tk) && (tc->visible_count > 1))
299 {
300 char * label = g_strdup_printf("(%d) %s", tc->visible_count, tc->visible_name);
301 gtk_widget_set_tooltip_text(tk->button, label);
302 panel_draw_label_text(tk->tb->plug->panel, tk->label, label, (tk->entered_state || tk->flash_state), tk->tb->flat_button);
303 g_free(label);
304 }
305 else
306 {
307 char * name = tk->iconified ? tk->name_iconified : tk->name;
308 if (tk->tb->tooltips)
309 gtk_widget_set_tooltip_text(tk->button, name);
310 panel_draw_label_text(tk->tb->plug->panel, tk->label, name, (tk->entered_state || tk->flash_state), tk->tb->flat_button);
311 }
312 }
313
314 /* Determine if a task is visible. */
315 static gboolean task_is_visible(TaskbarPlugin * tb, Task * tk)
316 {
317 /* Not visible due to grouping. */
318 if ((tb->grouped_tasks) && (tk->res_class != NULL) && (tk->res_class->visible_task != tk))
319 return FALSE;
320
321 /* Desktop placement. */
322 return task_is_visible_on_current_desktop(tb, tk);
323 }
324
325 /* Redraw a task button. */
326 static void task_button_redraw(Task * tk, TaskbarPlugin * tb)
327 {
328 if (task_is_visible(tb, tk))
329 {
330 task_draw_label(tk);
331 icon_grid_set_visible(tb->icon_grid, tk->button, TRUE);
332 }
333 else
334 icon_grid_set_visible(tb->icon_grid, tk->button, FALSE);
335 }
336
337 /* Redraw all tasks in the taskbar. */
338 static void taskbar_redraw(TaskbarPlugin * tb)
339 {
340 Task * tk;
341 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
342 task_button_redraw(tk, tb);
343 }
344
345 /* Determine if a task should be visible given its NET_WM_STATE. */
346 static gboolean accept_net_wm_state(NetWMState * nws)
347 {
348 return ( ! (nws->skip_taskbar));
349 }
350
351 /* Determine if a task should be visible given its NET_WM_WINDOW_TYPE. */
352 static gboolean accept_net_wm_window_type(NetWMWindowType * nwwt)
353 {
354 return ( ! ((nwwt->desktop) || (nwwt->dock) || (nwwt->splash)));
355 }
356
357 /* Free the names associated with a task. */
358 static void task_free_names(Task * tk)
359 {
360 g_free(tk->name);
361 g_free(tk->name_iconified);
362 tk->name = tk->name_iconified = NULL;
363 }
364
365 /* Set the names associated with a task.
366 * This is expected to be the same as the title the window manager is displaying. */
367 static void task_set_names(Task * tk, Atom source)
368 {
369 char * name = NULL;
370
371 /* Try _NET_WM_VISIBLE_NAME, which supports UTF-8.
372 * If it is set, the window manager is displaying it as the window title. */
373 if ((source == None) || (source == a_NET_WM_VISIBLE_NAME))
374 {
375 name = get_utf8_property(tk->win, a_NET_WM_VISIBLE_NAME);
376 if (name != NULL)
377 tk->name_source = a_NET_WM_VISIBLE_NAME;
378 }
379
380 /* Try _NET_WM_NAME, which supports UTF-8, but do not overwrite _NET_WM_VISIBLE_NAME. */
381 if ((name == NULL)
382 && ((source == None) || (source == a_NET_WM_NAME))
383 && ((tk->name_source == None) || (tk->name_source == a_NET_WM_NAME) || (tk->name_source == XA_WM_NAME)))
384 {
385 name = get_utf8_property(tk->win, a_NET_WM_NAME);
386 if (name != NULL)
387 tk->name_source = a_NET_WM_NAME;
388 }
389
390 /* Try WM_NAME, which supports only ISO-8859-1, but do not overwrite _NET_WM_VISIBLE_NAME or _NET_WM_NAME. */
391 if ((name == NULL)
392 && ((source == None) || (source == XA_WM_NAME))
393 && ((tk->name_source == None) || (tk->name_source == XA_WM_NAME)))
394 {
395 name = get_textproperty(tk->win, XA_WM_NAME);
396 if (name != NULL)
397 tk->name_source = XA_WM_NAME;
398 }
399
400 /* Set the name into the task context, and also on the tooltip. */
401 if (name != NULL)
402 {
403 task_free_names(tk);
404 tk->name = g_strdup(name);
405 tk->name_iconified = g_strdup_printf("[%s]", name);
406 g_free(name);
407
408 /* Redraw the button. */
409 task_button_redraw(tk, tk->tb);
410 }
411 }
412
413 /* Unlink a task from the class list because its class changed or it was deleted. */
414 static void task_unlink_class(Task * tk)
415 {
416 TaskClass * tc = tk->res_class;
417 if (tc != NULL)
418 {
419 /* Remove from per-class task list. */
420 if (tc->res_class_head == tk)
421 {
422 /* Removing the head of the list. This causes a new task to be the visible task, so we redraw. */
423 tc->res_class_head = tk->res_class_flink;
424 if (tc->res_class_head != NULL)
425 task_button_redraw(tc->res_class_head, tk->tb);
426 }
427 else
428 {
429 /* Locate the task and its predecessor in the list and then remove it. For safety, ensure it is found. */
430 Task * tk_pred = NULL;
431 Task * tk_cursor;
432 for (
433 tk_cursor = tc->res_class_head;
434 ((tk_cursor != NULL) && (tk_cursor != tk));
435 tk_pred = tk_cursor, tk_cursor = tk_cursor->res_class_flink) ;
436 if (tk_cursor == tk)
437 tk_pred->res_class_flink = tk->res_class_flink;
438 }
439
440 /* Recompute group visibility. */
441 recompute_group_visibility_for_class(tk->tb, tc);
442 }
443 }
444
445 /* Enter class with specified name. */
446 static TaskClass * taskbar_enter_res_class(TaskbarPlugin * tb, char * res_class, gboolean * name_consumed)
447 {
448 /* Find existing entry or insertion point. */
449 *name_consumed = FALSE;
450 TaskClass * tc_pred = NULL;
451 TaskClass * tc;
452 for (tc = tb->res_class_list; tc != NULL; tc_pred = tc, tc = tc->res_class_flink)
453 {
454 int status = strcmp(res_class, tc->res_class);
455 if (status == 0)
456 return tc;
457 if (status < 0)
458 break;
459 }
460
461 /* Insert new entry. */
462 tc = g_new0(TaskClass, 1);
463 tc->res_class = res_class;
464 *name_consumed = TRUE;
465 if (tc_pred == NULL)
466 {
467 tc->res_class_flink = tb->res_class_list;
468 tb->res_class_list = tc;
469 }
470 else
471 {
472 tc->res_class_flink = tc_pred->res_class_flink;
473 tc_pred->res_class_flink = tc;
474 }
475 return tc;
476 }
477
478 /* Set the class associated with a task. */
479 static void task_set_class(Task * tk)
480 {
481 /* Read the WM_CLASS property. */
482 XClassHint ch;
483 ch.res_name = NULL;
484 ch.res_class = NULL;
485 XGetClassHint(GDK_DISPLAY(), tk->win, &ch);
486
487 /* If the res_name was returned, free it. We make no use of it at this time. */
488 if (ch.res_name != NULL)
489 {
490 XFree(ch.res_name);
491 }
492
493 /* If the res_class was returned, process it.
494 * This identifies the application that created the window and is the basis for taskbar grouping. */
495 if (ch.res_class != NULL)
496 {
497 /* Convert the class to UTF-8 and enter it in the class table. */
498 gchar * res_class = g_locale_to_utf8(ch.res_class, -1, NULL, NULL, NULL);
499 gboolean name_consumed;
500 TaskClass * tc = taskbar_enter_res_class(tk->tb, res_class, &name_consumed);
501 if ( ! name_consumed) g_free(res_class);
502
503 /* If the task changed class, update data structures. */
504 TaskClass * old_tc = tk->res_class;
505 if (old_tc != tc)
506 {
507 /* Unlink from previous class, if any. */
508 task_unlink_class(tk);
509
510 /* Add to end of per-class task list. Do this to keep the popup menu in order of creation. */
511 if (tc->res_class_head == NULL)
512 tc->res_class_head = tk;
513 else
514 {
515 Task * tk_pred;
516 for (tk_pred = tc->res_class_head; tk_pred->res_class_flink != NULL; tk_pred = tk_pred->res_class_flink) ;
517 tk_pred->res_class_flink = tk;
518 task_button_redraw(tk, tk->tb);
519 }
520 tk->res_class = tc;
521
522 /* Recompute group visibility. */
523 recompute_group_visibility_for_class(tk->tb, tc);
524 }
525 XFree(ch.res_class);
526 }
527 }
528
529 /* Look up a task in the task list. */
530 static Task * task_lookup(TaskbarPlugin * tb, Window win)
531 {
532 Task * tk;
533 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
534 {
535 if (tk->win == win)
536 return tk;
537 if (tk->win > win)
538 break;
539 }
540 return NULL;
541 }
542
543 /* Delete a task and optionally unlink it from the task list. */
544 static void task_delete(TaskbarPlugin * tb, Task * tk, gboolean unlink)
545 {
546 /* If we think this task had focus, remove that. */
547 if (tb->focused == tk)
548 tb->focused = NULL;
549
550 /* Deallocate structures. */
551 icon_grid_remove(tb->icon_grid, tk->button);
552 task_free_names(tk);
553 task_unlink_class(tk);
554
555 /* If there is an urgency timeout, remove it. */
556 if (tk->flash_timeout != 0)
557 g_source_remove(tk->flash_timeout);
558
559 /* If requested, unlink the task from the task list.
560 * If not requested, the caller will do this. */
561 if (unlink)
562 {
563 if (tb->task_list == tk)
564 tb->task_list = tk->task_flink;
565 else
566 {
567 /* Locate the task and its predecessor in the list and then remove it. For safety, ensure it is found. */
568 Task * tk_pred = NULL;
569 Task * tk_cursor;
570 for (
571 tk_cursor = tb->task_list;
572 ((tk_cursor != NULL) && (tk_cursor != tk));
573 tk_pred = tk_cursor, tk_cursor = tk_cursor->task_flink) ;
574 if (tk_cursor == tk)
575 tk_pred->task_flink = tk->task_flink;
576 }
577 }
578
579 /* Deallocate the task structure. */
580 g_free(tk);
581 }
582
583 /* Get the color map from a pixmap.
584 * From libwnck, Copyright (C) 2001 Havoc Pennington. */
585 static GdkColormap * get_colormap_from_pixmap(GdkPixmap * pixmap)
586 {
587 GdkColormap * colormap = gdk_drawable_get_colormap(pixmap);
588 if (colormap != NULL)
589 g_object_ref(G_OBJECT(colormap));
590 else
591 {
592 if (gdk_drawable_get_depth(pixmap) == 1)
593 {
594 /* Try null colormap. */
595 colormap = NULL;
596 }
597 else
598 {
599 /* Try system colormap. */
600 GdkScreen * screen = gdk_drawable_get_screen(GDK_DRAWABLE(pixmap));
601 colormap = gdk_screen_get_system_colormap(screen);
602 g_object_ref(G_OBJECT(colormap));
603 }
604 }
605
606 /* Be sure we aren't going to blow up due to visual mismatch. */
607 if ((colormap != NULL) && (gdk_colormap_get_visual(colormap)->depth != gdk_drawable_get_depth(pixmap)))
608 colormap = NULL;
609
610 return colormap;
611 }
612
613 /* These functions with the prefix wnck are taken from libwnck
614 * Copyright (C) 2001 Havoc Pennington
615 * slightly modified by Hong Jen Yee for LXPanel
616 */
617
618 /* Get a pixbuf from a pixmap. */
619 static GdkPixbuf * _wnck_gdk_pixbuf_get_from_pixmap(
620 GdkPixbuf * dest, Pixmap xpixmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
621 {
622 /* Initialize; get the drawable and its colormap. */
623 GdkPixbuf * retval = NULL;
624 GdkDrawable * drawable = gdk_xid_table_lookup(xpixmap);
625 if (drawable != NULL)
626 g_object_ref(G_OBJECT(drawable));
627 else
628 drawable = gdk_pixmap_foreign_new(xpixmap);
629 GdkColormap * colormap = get_colormap_from_pixmap(drawable);
630
631 /* Do the major work. */
632 retval = gdk_pixbuf_get_from_drawable(dest,
633 drawable,
634 colormap,
635 src_x, src_y,
636 dest_x, dest_y,
637 width, height);
638
639 /* Clean up and return. */
640 if (colormap != NULL)
641 g_object_unref(G_OBJECT(colormap));
642 g_object_unref(G_OBJECT(drawable));
643 return retval;
644 }
645
646 /* Apply a mask to a pixbuf.
647 * From libwnck, Copyright (C) 2001 Havoc Pennington. */
648 static GdkPixbuf * apply_mask(GdkPixbuf * pixbuf, GdkPixbuf * mask)
649 {
650 /* Initialize. */
651 int w = MIN(gdk_pixbuf_get_width(mask), gdk_pixbuf_get_width(pixbuf));
652 int h = MIN(gdk_pixbuf_get_height(mask), gdk_pixbuf_get_height(pixbuf));
653 GdkPixbuf * with_alpha = gdk_pixbuf_add_alpha(pixbuf, FALSE, 0, 0, 0);
654 guchar * dst = gdk_pixbuf_get_pixels(with_alpha);
655 guchar * src = gdk_pixbuf_get_pixels(mask);
656 int dst_stride = gdk_pixbuf_get_rowstride(with_alpha);
657 int src_stride = gdk_pixbuf_get_rowstride(mask);
658
659 /* Loop to do the work. */
660 int i;
661 for (i = 0; i < h; i += 1)
662 {
663 int j;
664 for (j = 0; j < w; j += 1)
665 {
666 guchar * s = src + i * src_stride + j * 3;
667 guchar * d = dst + i * dst_stride + j * 4;
668
669 /* s[0] == s[1] == s[2], they are 255 if the bit was set, 0 otherwise. */
670 d[3] = ((s[0] == 0) ? 0 : 255); /* 0 = transparent, 255 = opaque */
671 }
672 }
673
674 return with_alpha;
675 }
676
677 /* Get an icon from the window manager for a task, and scale it to a specified size. */
678 static GdkPixbuf * get_wm_icon(Window task_win, int required_width, int required_height, Atom source, Atom * current_source)
679 {
680 /* The result. */
681 GdkPixbuf * pixmap = NULL;
682 Atom possible_source = None;
683 int result = -1;
684
685 if ((source == None) || (source == a_NET_WM_ICON))
686 {
687 /* Important Notes:
688 * According to freedesktop.org document:
689 * http://standards.freedesktop.org/wm-spec/wm-spec-1.4.html#id2552223
690 * _NET_WM_ICON contains an array of 32-bit packed CARDINAL ARGB.
691 * However, this is incorrect. Actually it's an array of long integers.
692 * Toolkits like gtk+ use unsigned long here to store icons.
693 * Besides, according to manpage of XGetWindowProperty, when returned format,
694 * is 32, the property data will be stored as an array of longs
695 * (which in a 64-bit application will be 64-bit values that are
696 * padded in the upper 4 bytes).
697 */
698
699 /* Get the window property _NET_WM_ICON, if possible. */
700 Atom type = None;
701 int format;
702 gulong nitems;
703 gulong bytes_after;
704 gulong * data = NULL;
705 result = XGetWindowProperty(
706 GDK_DISPLAY(),
707 task_win,
708 a_NET_WM_ICON,
709 0, G_MAXLONG,
710 False, XA_CARDINAL,
711 &type, &format, &nitems, &bytes_after, (void *) &data);
712
713 /* Inspect the result to see if it is usable. If not, and we got data, free it. */
714 if ((type != XA_CARDINAL) || (nitems <= 0))
715 {
716 if (data != NULL)
717 XFree(data);
718 result = -1;
719 }
720
721 /* If the result is usable, extract the icon from it. */
722 if (result == Success)
723 {
724 /* Get the largest icon available, unless there is one that is the desired size. */
725 /* FIXME: should we try to find an icon whose size is closest to
726 * required_width and required_height to reduce unnecessary resizing? */
727 gulong * pdata = data;
728 gulong * pdata_end = data + nitems;
729 gulong * max_icon = NULL;
730 gulong max_w = 0;
731 gulong max_h = 0;
732 while ((pdata + 2) < pdata_end)
733 {
734 /* Extract the width and height. */
735 gulong w = pdata[0];
736 gulong h = pdata[1];
737 gulong size = w * h;
738 pdata += 2;
739
740 /* Bounds check the icon. */
741 if (pdata + size > pdata_end)
742 break;
743
744 /* Rare special case: the desired size is the same as icon size. */
745 if ((required_width == w) && (required_height == h))
746 {
747 max_icon = pdata;
748 max_w = w;
749 max_h = h;
750 break;
751 }
752
753 /* If the icon is the largest so far, capture it. */
754 if ((w > max_w) && (h > max_h))
755 {
756 max_icon = pdata;
757 max_w = w;
758 max_h = h;
759 }
760 pdata += size;
761 }
762
763 /* If an icon was extracted, convert it to a pixbuf.
764 * Its size is max_w and max_h. */
765 if (max_icon != NULL)
766 {
767 /* Allocate enough space for the pixel data. */
768 gulong len = max_w * max_h;
769 guchar * pixdata = g_new(guchar, len * 4);
770
771 /* Loop to convert the pixel data. */
772 guchar * p = pixdata;
773 int i;
774 for (i = 0; i < len; p += 4, i += 1)
775 {
776 guint argb = max_icon[i];
777 guint rgba = (argb << 8) | (argb >> 24);
778 p[0] = rgba >> 24;
779 p[1] = (rgba >> 16) & 0xff;
780 p[2] = (rgba >> 8) & 0xff;
781 p[3] = rgba & 0xff;
782 }
783
784 /* Initialize a pixmap with the pixel data. */
785 pixmap = gdk_pixbuf_new_from_data(
786 pixdata,
787 GDK_COLORSPACE_RGB,
788 TRUE, 8, /* has_alpha, bits_per_sample */
789 max_w, max_h, max_w * 4,
790 (GdkPixbufDestroyNotify) g_free,
791 NULL);
792 possible_source = a_NET_WM_ICON;
793 }
794 else
795 result = -1;
796
797 /* Free the X property data. */
798 XFree(data);
799 }
800 }
801
802 /* No icon available from _NET_WM_ICON. Next try WM_HINTS, but do not overwrite _NET_WM_ICON. */
803 if ((result != Success) && (*current_source != a_NET_WM_ICON)
804 && ((source == None) || (source != a_NET_WM_ICON)))
805 {
806 XWMHints * hints = XGetWMHints(GDK_DISPLAY(), task_win);
807 result = (hints != NULL) ? Success : -1;
808 Pixmap xpixmap = None;
809 Pixmap xmask = None;
810
811 if (result == Success)
812 {
813 /* WM_HINTS is available. Extract the X pixmap and mask. */
814 if ((hints->flags & IconPixmapHint))
815 xpixmap = hints->icon_pixmap;
816 if ((hints->flags & IconMaskHint))
817 xmask = hints->icon_mask;
818 XFree(hints);
819 if (xpixmap != None)
820 {
821 result = Success;
822 possible_source = XA_WM_HINTS;
823 }
824 else
825 result = -1;
826 }
827
828 if (result != Success)
829 {
830 /* No icon available from _NET_WM_ICON or WM_HINTS. Next try KWM_WIN_ICON. */
831 Atom type = None;
832 int format;
833 gulong nitems;
834 gulong bytes_after;
835 Pixmap *icons = NULL;
836 Atom kwin_win_icon_atom = gdk_x11_get_xatom_by_name("KWM_WIN_ICON");
837 result = XGetWindowProperty(
838 GDK_DISPLAY(),
839 task_win,
840 kwin_win_icon_atom,
841 0, G_MAXLONG,
842 False, kwin_win_icon_atom,
843 &type, &format, &nitems, &bytes_after, (void *) &icons);
844
845 /* Inspect the result to see if it is usable. If not, and we got data, free it. */
846 if (type != kwin_win_icon_atom)
847 {
848 if (icons != NULL)
849 XFree(icons);
850 result = -1;
851 }
852
853 /* If the result is usable, extract the X pixmap and mask from it. */
854 if (result == Success)
855 {
856 xpixmap = icons[0];
857 xmask = icons[1];
858 if (xpixmap != None)
859 {
860 result = Success;
861 possible_source = kwin_win_icon_atom;
862 }
863 else
864 result = -1;
865 }
866 }
867
868 /* If we have an X pixmap, get its geometry.*/
869 unsigned int w, h;
870 if (result == Success)
871 {
872 Window unused_win;
873 int unused;
874 unsigned int unused_2;
875 result = XGetGeometry(
876 GDK_DISPLAY(), xpixmap,
877 &unused_win, &unused, &unused, &w, &h, &unused_2, &unused_2) ? Success : -1;
878 }
879
880 /* If we have an X pixmap and its geometry, convert it to a GDK pixmap. */
881 if (result == Success)
882 {
883 pixmap = _wnck_gdk_pixbuf_get_from_pixmap(NULL, xpixmap, 0, 0, 0, 0, w, h);
884 result = ((pixmap != NULL) ? Success : -1);
885 }
886
887 /* If we have success, see if the result needs to be masked.
888 * Failures here are implemented as nonfatal. */
889 if ((result == Success) && (xmask != None))
890 {
891 Window unused_win;
892 int unused;
893 unsigned int unused_2;
894 if (XGetGeometry(
895 GDK_DISPLAY(), xmask,
896 &unused_win, &unused, &unused, &w, &h, &unused_2, &unused_2))
897 {
898 /* Convert the X mask to a GDK pixmap. */
899 GdkPixbuf * mask = _wnck_gdk_pixbuf_get_from_pixmap(NULL, xmask, 0, 0, 0, 0, w, h);
900 if (mask != NULL)
901 {
902 /* Apply the mask. */
903 GdkPixbuf * masked_pixmap = apply_mask(pixmap, mask);
904 g_object_unref(G_OBJECT(pixmap));
905 g_object_unref(G_OBJECT(mask));
906 pixmap = masked_pixmap;
907 }
908 }
909 }
910 }
911
912 /* If we got a pixmap, scale it and return it. */
913 if (pixmap == NULL)
914 return NULL;
915 else
916 {
917 GdkPixbuf * ret = gdk_pixbuf_scale_simple(pixmap, required_width, required_height, GDK_INTERP_TILES);
918 g_object_unref(pixmap);
919 *current_source = possible_source;
920 return ret;
921 }
922 }
923
924 /* Update the icon of a task. */
925 static GdkPixbuf * task_update_icon(TaskbarPlugin * tb, Task * tk, Atom source)
926 {
927 /* Get the icon from the window's hints. */
928 GdkPixbuf * pixbuf = get_wm_icon(tk->win, tb->icon_size, tb->icon_size, source, &tk->image_source);
929
930 /* If that fails, and we have no other icon yet, return the fallback icon. */
931 if ((pixbuf == NULL)
932 && ((source == None) || (tk->image_source == None)))
933 {
934 /* Establish the fallback task icon. This is used when no other icon is available. */
935 if (tb->fallback_pixbuf == NULL)
936 tb->fallback_pixbuf = gdk_pixbuf_new_from_xpm_data((const char **) icon_xpm);
937 g_object_ref(tb->fallback_pixbuf);
938 pixbuf = tb->fallback_pixbuf;
939 }
940
941 /* Return what we have. This may be NULL to indicate that no change should be made to the icon. */
942 return pixbuf;
943 }
944
945 /* Timer expiration for urgency notification. Also used to draw the button in setting and clearing urgency. */
946 static gboolean flash_window_timeout(Task * tk)
947 {
948 /* Set state on the button and redraw. */
949 if (tk->tb->flat_button)
950 task_draw_label(tk);
951 else
952 {
953 gtk_widget_set_state(tk->button, tk->flash_state ? GTK_STATE_SELECTED : GTK_STATE_NORMAL);
954 gtk_widget_queue_draw(tk->button);
955 }
956
957 /* Complement the flashing context. */
958 tk->flash_state = ! tk->flash_state;
959 return TRUE;
960 }
961
962 /* Set urgency notification. */
963 static void task_set_urgency(Task * tk)
964 {
965 if (( ! tk->tb->grouped_tasks) || (tk->res_class == NULL))
966 {
967 /* Set the flashing context and flash the window immediately. */
968 tk->flash_state = TRUE;
969 flash_window_timeout(tk);
970
971 /* Set the timer if none is set. */
972 if (tk->flash_timeout == 0)
973 set_timer_on_task(tk);
974 }
975 else
976 recompute_group_visibility_for_class(tk->tb, tk->res_class);
977 }
978
979 /* Clear urgency notification. */
980 static void task_clear_urgency(Task * tk)
981 {
982 if (( ! tk->tb->grouped_tasks) || (tk->res_class == NULL))
983 {
984 /* Remove the timer if one is set. */
985 if (tk->flash_timeout != 0)
986 {
987 g_source_remove(tk->flash_timeout);
988 tk->flash_timeout = 0;
989 }
990
991 /* Clear the flashing context and unflash the window immediately. */
992 tk->flash_state = FALSE;
993 flash_window_timeout(tk);
994 tk->flash_state = FALSE;
995 }
996 else
997 recompute_group_visibility_for_class(tk->tb, tk->res_class);
998 }
999
1000 /* Do the proper steps to raise a window.
1001 * This means removing it from iconified state and bringing it to the front.
1002 * We also switch the active desktop and viewport if needed. */
1003 static void task_raise_window(Task * tk, guint32 time)
1004 {
1005 /* Change desktop if needed. */
1006 if ((tk->desktop != -1) && (tk->desktop != tk->tb->current_desktop))
1007 Xclimsg(GDK_ROOT_WINDOW(), a_NET_CURRENT_DESKTOP, tk->desktop, 0, 0, 0, 0);
1008
1009 /* Raise the window. We can use NET_ACTIVE_WINDOW if the window manager supports it.
1010 * Otherwise, do it the old way with XMapRaised and XSetInputFocus. */
1011 if (tk->tb->use_net_active)
1012 Xclimsg(tk->win, a_NET_ACTIVE_WINDOW, 2, time, 0, 0, 0);
1013 else
1014 {
1015 GdkWindow * gdkwindow = gdk_xid_table_lookup(tk->win);
1016 if (gdkwindow != NULL)
1017 gdk_window_show(gdkwindow);
1018 else
1019 XMapRaised(GDK_DISPLAY(), tk->win);
1020 XSync(GDK_DISPLAY(), False); /* This we need to avoid BadMatch */
1021 XSetInputFocus(GDK_DISPLAY(), tk->win, RevertToNone, time);
1022 }
1023
1024 /* Change viewport if needed. */
1025 XWindowAttributes xwa;
1026 XGetWindowAttributes(GDK_DISPLAY(), tk->win, &xwa);
1027 Xclimsg(tk->win, a_NET_DESKTOP_VIEWPORT, xwa.x, xwa.y, 0, 0, 0);
1028 }
1029
1030 /* Position-calculation callback for grouped-task and window-management popup menu. */
1031 static void taskbar_popup_set_position(GtkWidget * menu, gint * px, gint * py, gboolean * push_in, gpointer data)
1032 {
1033 Task * tk = (Task *) data;
1034
1035 /* Get the allocation of the popup menu. */
1036 GtkRequisition popup_req;
1037 gtk_widget_size_request(menu, &popup_req);
1038
1039 /* Determine the coordinates. */
1040 plugin_popup_set_position_helper(tk->tb->plug, tk->button, menu, &popup_req, px, py);
1041 *push_in = TRUE;
1042 }
1043
1044 /* Remove the grouped-task popup menu from the screen. */
1045 static void task_group_menu_destroy(TaskbarPlugin * tb)
1046 {
1047 if (tb->group_menu != NULL)
1048 {
1049 gtk_widget_destroy(tb->group_menu);
1050 tb->group_menu = NULL;
1051 }
1052 }
1053
1054 /* Handler for "button-press-event" event from taskbar button,
1055 * or "activate" event from grouped-task popup menu item. */
1056 static gboolean taskbar_task_control_event(GtkWidget * widget, GdkEventButton * event, Task * tk, gboolean popup_menu)
1057 {
1058 TaskbarPlugin * tb = tk->tb;
1059 TaskClass * tc = tk->res_class;
1060 if ((tb->grouped_tasks) && (tc != NULL) && (tc->visible_count > 1) && (GTK_IS_BUTTON(widget)))
1061 {
1062 /* If this is a grouped-task representative, meaning that there is a class with at least two windows,
1063 * bring up a popup menu listing all the class members. */
1064 GtkWidget * menu = gtk_menu_new();
1065 Task * tk_cursor;
1066 for (tk_cursor = tc->res_class_head; tk_cursor != NULL; tk_cursor = tk_cursor->res_class_flink)
1067 {
1068 if (task_is_visible_on_current_desktop(tb, tk_cursor))
1069 {
1070 /* The menu item has the name, or the iconified name, and the icon of the application window. */
1071 GtkWidget * mi = gtk_image_menu_item_new_with_label(((tk_cursor->iconified) ? tk_cursor->name_iconified : tk_cursor->name));
1072 GtkWidget * im = gtk_image_new_from_pixbuf(gtk_image_get_pixbuf(GTK_IMAGE(tk_cursor->image)));
1073 gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(mi), im);
1074 g_signal_connect(mi, "button_press_event", G_CALLBACK(taskbar_popup_activate_event), (gpointer) tk_cursor);
1075 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1076 }
1077 }
1078
1079 /* Show the menu. Set context so we can find the menu later to dismiss it.
1080 * Use a position-calculation callback to get the menu nicely positioned with respect to the button. */
1081 gtk_widget_show_all(menu);
1082 tb->group_menu = menu;
1083 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, (GtkMenuPositionFunc) taskbar_popup_set_position, (gpointer) tk, event->button, event->time);
1084 }
1085 else
1086 {
1087 /* Not a grouped-task representative, or entered from the grouped-task popup menu. */
1088 Task * visible_task = ((tk->res_class == NULL) ? tk : tk->res_class->visible_task);
1089 task_group_menu_destroy(tb);
1090
1091 if (event->button == 1)
1092 {
1093 /* Left button.
1094 * If the task is iconified, raise it.
1095 * If the task is not iconified and has focus, iconify it.
1096 * If the task is not iconified and does not have focus, raise it. */
1097 if (tk->iconified)
1098 task_raise_window(tk, event->time);
1099 else if ((tk->focused) || (tk == tb->focused_previous))
1100 XIconifyWindow(GDK_DISPLAY(), tk->win, DefaultScreen(GDK_DISPLAY()));
1101 else
1102 task_raise_window(tk, event->time);
1103 }
1104 else if (event->button == 2)
1105 {
1106 /* Middle button. Toggle the shaded state of the window. */
1107 Xclimsg(tk->win, a_NET_WM_STATE,
1108 2, /* a_NET_WM_STATE_TOGGLE */
1109 a_NET_WM_STATE_SHADED,
1110 0, 0, 0);
1111 }
1112 else if (event->button == 3)
1113 {
1114 /* Right button. Bring up the window state popup menu. */
1115 tk->tb->menutask = tk;
1116 gtk_menu_popup(
1117 GTK_MENU(tb->menu),
1118 NULL, NULL,
1119 (GtkMenuPositionFunc) taskbar_popup_set_position, (gpointer) visible_task,
1120 event->button, event->time);
1121 }
1122 }
1123
1124 /* As a matter of policy, avoid showing selected or prelight states on flat buttons. */
1125 if (tb->flat_button)
1126 gtk_widget_set_state(widget, GTK_STATE_NORMAL);
1127 return TRUE;
1128 }
1129
1130 /* Handler for "button-press-event" event from taskbar button. */
1131 static gboolean taskbar_button_press_event(GtkWidget * widget, GdkEventButton * event, Task * tk)
1132 {
1133 return taskbar_task_control_event(widget, event, tk, FALSE);
1134 }
1135
1136 /* Handler for "activate" event from grouped-task popup menu item. */
1137 static gboolean taskbar_popup_activate_event(GtkWidget * widget, GdkEventButton * event, Task * tk)
1138 {
1139 return taskbar_task_control_event(widget, event, tk, TRUE);
1140 }
1141
1142 /* Handler for "drag-motion" timeout. */
1143 static gboolean taskbar_button_drag_motion_timeout(Task * tk)
1144 {
1145 guint time = gtk_get_current_event_time();
1146 task_raise_window(tk, ((time != 0) ? time : CurrentTime));
1147 tk->tb->dnd_delay_timer = 0;
1148 return FALSE;
1149 }
1150
1151 /* Handler for "drag-motion" event from taskbar button. */
1152 static gboolean taskbar_button_drag_motion(GtkWidget * widget, GdkDragContext * drag_context, gint x, gint y, guint time, Task * tk)
1153 {
1154 /* Prevent excessive motion notification. */
1155 if (tk->tb->dnd_delay_timer == 0)
1156 tk->tb->dnd_delay_timer = g_timeout_add(DRAG_ACTIVE_DELAY, (GSourceFunc) taskbar_button_drag_motion_timeout, tk);
1157 gdk_drag_status(drag_context, 0, time);
1158 return TRUE;
1159 }
1160
1161 /* Handler for "drag-leave" event from taskbar button. */
1162 static void taskbar_button_drag_leave(GtkWidget * widget, GdkDragContext * drag_context, guint time, Task * tk)
1163 {
1164 /* Cancel the timer if set. */
1165 if (tk->tb->dnd_delay_timer != 0)
1166 {
1167 g_source_remove(tk->tb->dnd_delay_timer);
1168 tk->tb->dnd_delay_timer = 0;
1169 }
1170 return;
1171 }
1172
1173 /* Handler for "enter" event from taskbar button. This indicates that the cursor position has entered the button. */
1174 static void taskbar_button_enter(GtkWidget * widget, Task * tk)
1175 {
1176 tk->entered_state = TRUE;
1177 if (tk->tb->flat_button)
1178 gtk_widget_set_state(widget, GTK_STATE_NORMAL);
1179 task_draw_label(tk);
1180 }
1181
1182 /* Handler for "leave" event from taskbar button. This indicates that the cursor position has left the button. */
1183 static void taskbar_button_leave(GtkWidget * widget, Task * tk)
1184 {
1185 tk->entered_state = FALSE;
1186 task_draw_label(tk);
1187 }
1188
1189 /* Handler for "scroll-event" event from taskbar button. */
1190 static gboolean taskbar_button_scroll_event(GtkWidget * widget, GdkEventScroll * event, Task * tk)
1191 {
1192 TaskbarPlugin * tb = tk->tb;
1193 TaskClass * tc = tk->res_class;
1194 if ((tb->use_mouse_wheel)
1195 && (( ! tb->grouped_tasks) || (tc == NULL) || (tc->visible_count == 1)))
1196 {
1197 if ((event->direction == GDK_SCROLL_UP) || (event->direction == GDK_SCROLL_LEFT))
1198 task_raise_window(tk, event->time);
1199 else
1200 XIconifyWindow(GDK_DISPLAY(), tk->win, DefaultScreen(GDK_DISPLAY()));
1201 }
1202 return TRUE;
1203 }
1204
1205 /* Handler for "size-allocate" event from taskbar button. */
1206 static void taskbar_button_size_allocate(GtkWidget * btn, GtkAllocation * alloc, Task * tk)
1207 {
1208 if (GTK_WIDGET_REALIZED(btn))
1209 {
1210 /* Get the coordinates of the button. */
1211 int x, y;
1212 gdk_window_get_origin(GTK_BUTTON(btn)->event_window, &x, &y);
1213
1214 /* Send a NET_WM_ICON_GEOMETRY property change on the window. */
1215 guint32 data[4];
1216 data[0] = x;
1217 data[1] = y;
1218 data[2] = alloc->width;
1219 data[3] = alloc->height;
1220 XChangeProperty(GDK_DISPLAY(), tk->win,
1221 gdk_x11_get_xatom_by_name("_NET_WM_ICON_GEOMETRY"),
1222 XA_CARDINAL, 32, PropModeReplace, (guchar *) &data, 4);
1223 }
1224 }
1225
1226 /* Update style on the taskbar when created or after a configuration change. */
1227 static void taskbar_update_style(TaskbarPlugin * tb)
1228 {
1229 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
1230 icon_grid_set_geometry(tb->icon_grid, bo,
1231 ((tb->icons_only) ? tb->icon_size + ICON_ONLY_EXTRA : tb->task_width_max), tb->icon_size + BUTTON_HEIGHT_EXTRA,
1232 tb->spacing, 0, tb->plug->panel->height);
1233 }
1234
1235 /* Update style on a task button when created or after a configuration change. */
1236 static void task_update_style(Task * tk, TaskbarPlugin * tb)
1237 {
1238 if (tb->icons_only)
1239 gtk_widget_hide(tk->label);
1240 else
1241 gtk_widget_show(tk->label);
1242
1243 gtk_button_set_relief(GTK_BUTTON(tk->button), ((tb->flat_button) ? GTK_RELIEF_NONE : GTK_RELIEF_NORMAL));
1244
1245 task_draw_label(tk);
1246 }
1247
1248 /* Build graphic elements needed for a task button. */
1249 static void task_build_gui(TaskbarPlugin * tb, Task * tk)
1250 {
1251 /* NOTE
1252 * 1. the extended mask is sum of taskbar and pager needs
1253 * see bug [ 940441 ] pager loose track of windows
1254 *
1255 * Do not change event mask to gtk windows spawned by this gtk client
1256 * this breaks gtk internals */
1257 if ( ! FBPANEL_WIN(tk->win))
1258 XSelectInput(GDK_DISPLAY(), tk->win, PropertyChangeMask | StructureNotifyMask);
1259
1260 /* Allocate a toggle button as the top level widget. */
1261 tk->button = gtk_toggle_button_new();
1262 gtk_container_set_border_width(GTK_CONTAINER(tk->button), 0);
1263 gtk_drag_dest_set(tk->button, 0, NULL, 0, 0);
1264
1265 /* Connect signals to the button. */
1266 g_signal_connect(tk->button, "button_press_event", G_CALLBACK(taskbar_button_press_event), (gpointer) tk);
1267 g_signal_connect(G_OBJECT(tk->button), "drag-motion", G_CALLBACK(taskbar_button_drag_motion), (gpointer) tk);
1268 g_signal_connect(G_OBJECT(tk->button), "drag-leave", G_CALLBACK(taskbar_button_drag_leave), (gpointer) tk);
1269 g_signal_connect_after(G_OBJECT (tk->button), "enter", G_CALLBACK(taskbar_button_enter), (gpointer) tk);
1270 g_signal_connect_after(G_OBJECT (tk->button), "leave", G_CALLBACK(taskbar_button_leave), (gpointer) tk);
1271 g_signal_connect_after(G_OBJECT(tk->button), "scroll-event", G_CALLBACK(taskbar_button_scroll_event), (gpointer) tk);
1272 g_signal_connect(tk->button, "size-allocate", G_CALLBACK(taskbar_button_size_allocate), (gpointer) tk);
1273
1274 /* Create a box to contain the application icon and window title. */
1275 GtkWidget * container = gtk_hbox_new(FALSE, 1);
1276 gtk_container_set_border_width(GTK_CONTAINER(container), 0);
1277
1278 /* Create an image to contain the application icon and add it to the box. */
1279 GdkPixbuf* pixbuf = task_update_icon(tb, tk, None);
1280 tk->image = gtk_image_new_from_pixbuf(pixbuf);
1281 gtk_misc_set_padding(GTK_MISC(tk->image), 0, 0);
1282 g_object_unref(pixbuf);
1283 gtk_widget_show(tk->image);
1284 gtk_box_pack_start(GTK_BOX(container), tk->image, FALSE, FALSE, 0);
1285
1286 /* Create a label to contain the window title and add it to the box. */
1287 tk->label = gtk_label_new(NULL);
1288 gtk_misc_set_alignment(GTK_MISC(tk->label), 0.0, 0.5);
1289 gtk_label_set_ellipsize(GTK_LABEL(tk->label), PANGO_ELLIPSIZE_END);
1290 gtk_box_pack_start(GTK_BOX(container), tk->label, TRUE, TRUE, 0);
1291
1292 /* Add the box to the button. */
1293 gtk_widget_show(container);
1294 gtk_container_add(GTK_CONTAINER(tk->button), container);
1295 gtk_container_set_border_width(GTK_CONTAINER(tk->button), 0);
1296
1297 /* Add the button to the taskbar. */
1298 icon_grid_add(tb->icon_grid, tk->button, TRUE);
1299 GTK_WIDGET_UNSET_FLAGS(tk->button, GTK_CAN_FOCUS);
1300 GTK_WIDGET_UNSET_FLAGS(tk->button, GTK_CAN_DEFAULT);
1301
1302 /* Update styles on the button. */
1303 task_update_style(tk, tb);
1304
1305 /* Flash button for window with urgency hint. */
1306 if (tk->urgency)
1307 task_set_urgency(tk);
1308 }
1309
1310 /*****************************************************
1311 * handlers for NET actions *
1312 *****************************************************/
1313
1314 /* Handler for "client-list" event from root window listener. */
1315 static void taskbar_net_client_list(GtkWidget * widget, TaskbarPlugin * tb)
1316 {
1317 /* Get the NET_CLIENT_LIST property. */
1318 int client_count;
1319 Window * client_list = get_xaproperty(GDK_ROOT_WINDOW(), a_NET_CLIENT_LIST, XA_WINDOW, &client_count);
1320 if (client_list != NULL)
1321 {
1322 /* Loop over client list, correlating it with task list. */
1323 int i;
1324 for (i = 0; i < client_count; i++)
1325 {
1326 /* Search for the window in the task list. Set up context to do an insert right away if needed. */
1327 Task * tk_pred = NULL;
1328 Task * tk_cursor;
1329 Task * tk = NULL;
1330 for (tk_cursor = tb->task_list; tk_cursor != NULL; tk_pred = tk_cursor, tk_cursor = tk_cursor->task_flink)
1331 {
1332 if (tk_cursor->win == client_list[i])
1333 {
1334 tk = tk_cursor;
1335 break;
1336 }
1337 if (tk_cursor->win > client_list[i])
1338 break;
1339 }
1340
1341 /* Task is already in task list. */
1342 if (tk != NULL)
1343 tk->present_in_client_list = TRUE;
1344
1345 /* Task is not in task list. */
1346 else
1347 {
1348 /* Evaluate window state and window type to see if it should be in task list. */
1349 NetWMWindowType nwwt;
1350 NetWMState nws;
1351 get_net_wm_state(client_list[i], &nws);
1352 get_net_wm_window_type(client_list[i], &nwwt);
1353 if ((accept_net_wm_state(&nws))
1354 && (accept_net_wm_window_type(&nwwt)))
1355 {
1356 /* Allocate and initialize new task structure. */
1357 tk = g_new0(Task, 1);
1358 tk->present_in_client_list = TRUE;
1359 tk->win = client_list[i];
1360 tk->tb = tb;
1361 tk->name_source = None;
1362 tk->image_source = None;
1363 tk->iconified = (get_wm_state(tk->win) == IconicState);
1364 tk->desktop = get_net_wm_desktop(tk->win);
1365 if (tb->use_urgency_hint)
1366 tk->urgency = task_has_urgency(tk);
1367 task_build_gui(tb, tk);
1368 task_set_names(tk, None);
1369 task_set_class(tk);
1370
1371 /* Link the task structure into the task list. */
1372 if (tk_pred == NULL)
1373 {
1374 tk->task_flink = tb->task_list;
1375 tb->task_list = tk;
1376 }
1377 else
1378 {
1379 tk->task_flink = tk_pred->task_flink;
1380 tk_pred->task_flink = tk;
1381 }
1382 }
1383 }
1384 }
1385 XFree(client_list);
1386 }
1387
1388 /* Remove windows from the task list that are not present in the NET_CLIENT_LIST. */
1389 Task * tk_pred = NULL;
1390 Task * tk = tb->task_list;
1391 while (tk != NULL)
1392 {
1393 Task * tk_succ = tk->task_flink;
1394 if (tk->present_in_client_list)
1395 {
1396 tk->present_in_client_list = FALSE;
1397 tk_pred = tk;
1398 }
1399 else
1400 {
1401 if (tk_pred == NULL)
1402 tb->task_list = tk_succ;
1403 else tk_pred->task_flink = tk_succ;
1404 task_delete(tb, tk, FALSE);
1405 }
1406 tk = tk_succ;
1407 }
1408
1409 /* Redraw the taskbar. */
1410 taskbar_redraw(tb);
1411 }
1412
1413 /* Handler for "current-desktop" event from root window listener. */
1414 static void taskbar_net_current_desktop(GtkWidget * widget, TaskbarPlugin * tb)
1415 {
1416 /* Store the local copy of current desktops. Redisplay the taskbar. */
1417 tb->current_desktop = get_net_current_desktop();
1418 recompute_group_visibility_on_current_desktop(tb);
1419 taskbar_redraw(tb);
1420 }
1421
1422 /* Handler for "number-of-desktops" event from root window listener. */
1423 static void taskbar_net_number_of_desktops(GtkWidget * widget, TaskbarPlugin * tb)
1424 {
1425 /* Store the local copy of number of desktops. Recompute the popup menu and redisplay the taskbar. */
1426 tb->number_of_desktops = get_net_number_of_desktops();
1427 taskbar_make_menu(tb);
1428 taskbar_redraw(tb);
1429 }
1430
1431 /* Handler for "active-window" event from root window listener. */
1432 static void taskbar_net_active_window(GtkWidget * widget, TaskbarPlugin * tb)
1433 {
1434 gboolean drop_old = FALSE;
1435 gboolean make_new = FALSE;
1436 Task * ctk = tb->focused;
1437 Task * ntk = NULL;
1438
1439 /* Get the window that has focus. */
1440 Window * f = get_xaproperty(GDK_ROOT_WINDOW(), a_NET_ACTIVE_WINDOW, XA_WINDOW, 0);
1441 if (f == NULL)
1442 {
1443 /* No window has focus. */
1444 drop_old = TRUE;
1445 tb->focused_previous = NULL;
1446 }
1447 else
1448 {
1449 if (*f == tb->plug->panel->topxwin)
1450 {
1451 /* Taskbar window gained focus (this isn't supposed to be able to happen). Remember current focus. */
1452 if (ctk != NULL)
1453 {
1454 tb->focused_previous = ctk;
1455 drop_old = TRUE;
1456 }
1457 }
1458 else
1459 {
1460 /* Identify task that gained focus. */
1461 tb->focused_previous = NULL;
1462 ntk = task_lookup(tb, *f);
1463 if (ntk != ctk)
1464 {
1465 drop_old = TRUE;
1466 make_new = TRUE;
1467 }
1468 }
1469 XFree(f);
1470 }
1471
1472 /* If our idea of the current task lost focus, update data structures. */
1473 if ((ctk != NULL) && (drop_old))
1474 {
1475 ctk->focused = FALSE;
1476 tb->focused = NULL;
1477 task_button_redraw(ctk, tb);
1478 }
1479
1480 /* If a task gained focus, update data structures. */
1481 if ((ntk != NULL) && (make_new))
1482 {
1483 ntk->focused = TRUE;
1484 tb->focused = ntk;
1485 task_button_redraw(ntk, tb);
1486 }
1487 }
1488
1489 /* Determine if the "urgency" hint is set on a window. */
1490 static gboolean task_has_urgency(Task * tk)
1491 {
1492 gboolean result = FALSE;
1493 XWMHints * hints = (XWMHints *) get_xaproperty(tk->win, XA_WM_HINTS, XA_WM_HINTS, 0);
1494 if (hints != NULL)
1495 {
1496 if (hints->flags & XUrgencyHint)
1497 result = TRUE;
1498 XFree(hints);
1499 }
1500 return result;
1501 }
1502
1503 /* Handle PropertyNotify event.
1504 * http://tronche.com/gui/x/icccm/
1505 * http://standards.freedesktop.org/wm-spec/wm-spec-1.4.html */
1506 static void taskbar_property_notify_event(TaskbarPlugin *tb, XEvent *ev)
1507 {
1508 /* State may be PropertyNewValue, PropertyDeleted. */
1509 if (((XPropertyEvent*) ev)->state == PropertyNewValue)
1510 {
1511 Atom at = ev->xproperty.atom;
1512 Window win = ev->xproperty.window;
1513 if (win != GDK_ROOT_WINDOW())
1514 {
1515 /* Look up task structure by X window handle. */
1516 Task * tk = task_lookup(tb, win);
1517 if (tk != NULL)
1518 {
1519 /* Install an error handler that ignores BadWindow.
1520 * We frequently get a PropertyNotify event on deleted windows. */
1521 XErrorHandler previous_error_handler = XSetErrorHandler(panel_handle_x_error_swallow_BadWindow_BadDrawable);
1522
1523 /* Dispatch on atom. */
1524 if (at == a_NET_WM_DESKTOP)
1525 {
1526 /* Window changed desktop. */
1527 tk->desktop = get_net_wm_desktop(win);
1528 taskbar_redraw(tb);
1529 }
1530 else if ((at == XA_WM_NAME) || (at == a_NET_WM_NAME) || (at == a_NET_WM_VISIBLE_NAME))
1531 {
1532 /* Window changed name. */
1533 task_set_names(tk, at);
1534 if (tk->res_class != NULL)
1535 {
1536 /* A change to the window name may change the visible name of the class. */
1537 recompute_group_visibility_for_class(tb, tk->res_class);
1538 if (tk->res_class->visible_task != NULL)
1539 task_draw_label(tk->res_class->visible_task);
1540 }
1541 }
1542 else if (at == XA_WM_CLASS)
1543 {
1544 /* Window changed class. */
1545 task_set_class(tk);
1546 taskbar_redraw(tb);
1547 }
1548 else if (at == a_WM_STATE)
1549 {
1550 /* Window changed state. */
1551 tk->iconified = (get_wm_state(win) == IconicState);
1552 task_draw_label(tk);
1553 }
1554 else if (at == XA_WM_HINTS)
1555 {
1556 /* Window changed "window manager hints".
1557 * Some windows set their WM_HINTS icon after mapping. */
1558 GdkPixbuf * pixbuf = task_update_icon(tb, tk, XA_WM_HINTS);
1559 if (pixbuf != NULL)
1560 {
1561 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
1562 g_object_unref(pixbuf);
1563 }
1564
1565 if (tb->use_urgency_hint)
1566 {
1567 tk->urgency = task_has_urgency(tk);
1568 if (tk->urgency)
1569 task_set_urgency(tk);
1570 else
1571 task_clear_urgency(tk);
1572 }
1573 }
1574 else if (at == a_NET_WM_STATE)
1575 {
1576 /* Window changed EWMH state. */
1577 NetWMState nws;
1578 get_net_wm_state(tk->win, &nws);
1579 if ( ! accept_net_wm_state(&nws))
1580 {
1581 task_delete(tb, tk, TRUE);
1582 taskbar_redraw(tb);
1583 }
1584 }
1585 else if (at == a_NET_WM_ICON)
1586 {
1587 /* Window changed EWMH icon. */
1588 GdkPixbuf * pixbuf = task_update_icon(tb, tk, a_NET_WM_ICON);
1589 if (pixbuf != NULL)
1590 {
1591 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
1592 g_object_unref(pixbuf);
1593 }
1594 }
1595 else if (at == a_NET_WM_WINDOW_TYPE)
1596 {
1597 /* Window changed EWMH window type. */
1598 NetWMWindowType nwwt;
1599 get_net_wm_window_type(tk->win, &nwwt);
1600 if ( ! accept_net_wm_window_type(&nwwt))
1601 {
1602 task_delete(tb, tk, TRUE);
1603 taskbar_redraw(tb);
1604 }
1605 }
1606 XSetErrorHandler(previous_error_handler);
1607 }
1608 }
1609 }
1610 }
1611
1612 /* GDK event filter. */
1613 static GdkFilterReturn taskbar_event_filter(XEvent * xev, GdkEvent * event, TaskbarPlugin * tb)
1614 {
1615 /* Look for PropertyNotify events and update state. */
1616 if (xev->type == PropertyNotify)
1617 taskbar_property_notify_event(tb, xev);
1618 return GDK_FILTER_CONTINUE;
1619 }
1620
1621 /* Handler for "activate" event on Raise item of right-click menu for task buttons. */
1622 static void menu_raise_window(GtkWidget * widget, TaskbarPlugin * tb)
1623 {
1624 if ((tb->menutask->desktop != -1) && (tb->menutask->desktop != tb->current_desktop))
1625 Xclimsg(GDK_ROOT_WINDOW(), a_NET_CURRENT_DESKTOP, tb->menutask->desktop, 0, 0, 0, 0);
1626 XMapRaised(GDK_DISPLAY(), tb->menutask->win);
1627 task_group_menu_destroy(tb);
1628 }
1629
1630 /* Handler for "activate" event on Restore item of right-click menu for task buttons. */
1631 static void menu_restore_window(GtkWidget * widget, TaskbarPlugin * tb)
1632 {
1633 GdkWindow * win = gdk_window_foreign_new(tb->menutask->win);
1634 gdk_window_unmaximize(win);
1635 gdk_window_unref(win);
1636 task_group_menu_destroy(tb);
1637 }
1638
1639 /* Handler for "activate" event on Maximize item of right-click menu for task buttons. */
1640 static void menu_maximize_window(GtkWidget * widget, TaskbarPlugin * tb)
1641 {
1642 GdkWindow * win = gdk_window_foreign_new(tb->menutask->win);
1643 gdk_window_maximize(win);
1644 gdk_window_unref(win);
1645 task_group_menu_destroy(tb);
1646 }
1647
1648 /* Handler for "activate" event on Iconify item of right-click menu for task buttons. */
1649 static void menu_iconify_window(GtkWidget * widget, TaskbarPlugin * tb)
1650 {
1651 XIconifyWindow(GDK_DISPLAY(), tb->menutask->win, DefaultScreen(GDK_DISPLAY()));
1652 task_group_menu_destroy(tb);
1653 }
1654
1655 /* Handler for "activate" event on Move to Workspace item of right-click menu for task buttons. */
1656 static void menu_move_to_workspace(GtkWidget * widget, TaskbarPlugin * tb)
1657 {
1658 int num = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "num"));
1659 Xclimsg(tb->menutask->win, a_NET_WM_DESKTOP, num, 0, 0, 0, 0);
1660 task_group_menu_destroy(tb);
1661 }
1662
1663 /* Handler for "activate" event on Close item of right-click menu for task buttons. */
1664 static void menu_close_window(GtkWidget * widget, TaskbarPlugin * tb)
1665 {
1666 Xclimsgwm(tb->menutask->win, a_WM_PROTOCOLS, a_WM_DELETE_WINDOW);
1667 task_group_menu_destroy(tb);
1668 }
1669
1670 /* Make right-click menu for task buttons.
1671 * This depends on number of desktops and edge. */
1672 static void taskbar_make_menu(TaskbarPlugin * tb)
1673 {
1674 /* Deallocate old menu if present. */
1675 if (tb->menu != NULL)
1676 gtk_widget_destroy(tb->menu);
1677
1678 /* Allocate menu. */
1679 GtkWidget * menu = gtk_menu_new();
1680
1681 /* Add Raise menu item. */
1682 GtkWidget *mi = gtk_menu_item_new_with_mnemonic(_("_Raise"));
1683 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1684 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_raise_window, tb);
1685
1686 /* Add Restore menu item. */
1687 mi = gtk_menu_item_new_with_mnemonic(_("R_estore"));
1688 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1689 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_restore_window, tb);
1690
1691 /* Add Maximize menu item. */
1692 mi = gtk_menu_item_new_with_mnemonic(_("Ma_ximize"));
1693 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1694 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_maximize_window, tb);
1695
1696 /* Add Iconify menu item. */
1697 mi = gtk_menu_item_new_with_mnemonic(_("Ico_nify"));
1698 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1699 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_iconify_window, tb);
1700
1701 /* If multiple desktops are supported, add menu items to select them. */
1702 if (tb->number_of_desktops > 1)
1703 {
1704 char label[128];
1705
1706 /* Allocate submenu. */
1707 GtkWidget * workspace_menu = gtk_menu_new();
1708
1709 /* Loop over all desktops. */
1710 int i;
1711 for (i = 1; i <= tb->number_of_desktops; i++)
1712 {
1713 /* For the first 9 desktops, allow the desktop number as a keyboard shortcut. */
1714 if (i <= 9)
1715 {
1716 g_snprintf(label, sizeof(label), _("Workspace _%d"), i);
1717 mi = gtk_menu_item_new_with_mnemonic(label);
1718 }
1719 else
1720 {
1721 g_snprintf(label, sizeof(label), _("Workspace %d"), i);
1722 mi = gtk_menu_item_new_with_label(label);
1723 }
1724
1725 /* Set the desktop number as a property on the menu item. */
1726 g_object_set_data(G_OBJECT(mi), "num", GINT_TO_POINTER(i - 1));
1727 g_signal_connect(mi, "activate", G_CALLBACK(menu_move_to_workspace), tb);
1728 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), mi);
1729 }
1730
1731 /* Add a separator. */
1732 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), gtk_separator_menu_item_new());
1733
1734 /* Add "move to all workspaces" item. This causes the window to be visible no matter what desktop is active. */
1735 mi = gtk_menu_item_new_with_mnemonic(_("_All workspaces"));
1736 g_object_set_data(G_OBJECT(mi), "num", GINT_TO_POINTER(ALL_WORKSPACES));
1737 g_signal_connect(mi, "activate", G_CALLBACK(menu_move_to_workspace), tb);
1738 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), mi);
1739
1740 /* Add Move to Workspace menu item as a submenu. */
1741 mi = gtk_menu_item_new_with_mnemonic(_("_Move to Workspace"));
1742 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1743 gtk_menu_item_set_submenu(GTK_MENU_ITEM(mi), workspace_menu);
1744 }
1745
1746 /* Add Close menu item. By popular demand, we place this menu item closest to the cursor. */
1747 mi = gtk_menu_item_new_with_mnemonic (_("_Close Window"));
1748 if (tb->plug->panel->edge != EDGE_BOTTOM)
1749 {
1750 gtk_menu_shell_prepend(GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
1751 gtk_menu_shell_prepend(GTK_MENU_SHELL(menu), mi);
1752 }
1753 else
1754 {
1755 gtk_menu_shell_append(GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
1756 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1757 }
1758 g_signal_connect(G_OBJECT(mi), "activate", (GCallback)menu_close_window, tb);
1759
1760 gtk_widget_show_all(menu);
1761 tb->menu = menu;
1762 }
1763
1764 /* Build graphic elements needed for the taskbar. */
1765 static void taskbar_build_gui(Plugin * p)
1766 {
1767 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1768
1769 /* Set up style for taskbar. */
1770 gtk_rc_parse_string(taskbar_rc);
1771
1772 /* Allocate top level widget and set into Plugin widget pointer. */
1773 p->pwid = gtk_event_box_new();
1774 gtk_container_set_border_width(GTK_CONTAINER(p->pwid), 0);
1775 GTK_WIDGET_SET_FLAGS(p->pwid, GTK_NO_WINDOW);
1776 gtk_widget_set_name(p->pwid, "taskbar");
1777
1778 /* Make container for task buttons as a child of top level widget. */
1779 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
1780 tb->icon_grid = icon_grid_new(p->panel, p->pwid, bo, tb->task_width_max, tb->icon_size, tb->spacing, 0, p->panel->height);
1781 icon_grid_set_constrain_width(tb->icon_grid, TRUE);
1782 taskbar_update_style(tb);
1783
1784 /* Add GDK event filter. */
1785 gdk_window_add_filter(NULL, (GdkFilterFunc) taskbar_event_filter, tb);
1786
1787 /* Connect signal to receive mouse events on the unused portion of the taskbar. */
1788 g_signal_connect(p->pwid, "button-press-event", G_CALLBACK(plugin_button_press_event), p);
1789
1790 /* Connect signals to receive root window events and initialize root window properties. */
1791 tb->number_of_desktops = get_net_number_of_desktops();
1792 tb->current_desktop = get_net_current_desktop();
1793 g_signal_connect(G_OBJECT(fbev), "current_desktop", G_CALLBACK(taskbar_net_current_desktop), (gpointer) tb);
1794 g_signal_connect(G_OBJECT(fbev), "active_window", G_CALLBACK(taskbar_net_active_window), (gpointer) tb);
1795 g_signal_connect(G_OBJECT(fbev), "number_of_desktops", G_CALLBACK(taskbar_net_number_of_desktops), (gpointer) tb);
1796 g_signal_connect(G_OBJECT(fbev), "client_list", G_CALLBACK(taskbar_net_client_list), (gpointer) tb);
1797
1798 /* Make right-click menu for task buttons.
1799 * It is retained for the life of the taskbar and will be shown as needed.
1800 * Number of desktops and edge is needed for this operation. */
1801 taskbar_make_menu(tb);
1802 }
1803
1804 /* Determine if the window manager supports NET_ACTIVE_WINDOW. */
1805 static gboolean net_active_supported(void)
1806 {
1807 int nitems;
1808 Atom * data = get_xaproperty(GDK_ROOT_WINDOW(), a_NET_SUPPORTED, XA_ATOM, &nitems);
1809 if (data == NULL)
1810 return FALSE;
1811
1812 while (nitems > 0)
1813 {
1814 if (data[--nitems] == a_NET_ACTIVE_WINDOW)
1815 {
1816 XFree(data);
1817 return TRUE;
1818 }
1819 }
1820 XFree(data);
1821 return FALSE;
1822 }
1823
1824 /* Plugin constructor. */
1825 static int taskbar_constructor(Plugin * p, char ** fp)
1826 {
1827 /* Allocate plugin context and set into Plugin private data pointer. */
1828 TaskbarPlugin * tb = g_new0(TaskbarPlugin, 1);
1829 tb->plug = p;
1830 p->priv = tb;
1831
1832 /* Initialize to defaults. */
1833 tb->icon_size = p->panel->icon_size;
1834 tb->tooltips = TRUE;
1835 tb->icons_only = FALSE;
1836 tb->show_all_desks = FALSE;
1837 tb->task_width_max = TASK_WIDTH_MAX;
1838 tb->spacing = 1;
1839 tb->use_mouse_wheel = TRUE;
1840 tb->use_urgency_hint = TRUE;
1841 tb->grouped_tasks = FALSE;
1842 tb->use_net_active = net_active_supported();
1843
1844 /* Process configuration file. */
1845 line s;
1846 s.len = 256;
1847 if( fp )
1848 {
1849 while (lxpanel_get_line(fp, &s) != LINE_BLOCK_END) {
1850 if (s.type == LINE_NONE) {
1851 ERR( "taskbar: illegal token %s\n", s.str);
1852 return 0;
1853 }
1854 if (s.type == LINE_VAR)
1855 {
1856 if (g_ascii_strcasecmp(s.t[0], "tooltips") == 0)
1857 tb->tooltips = str2num(bool_pair, s.t[1], 1);
1858 else if (g_ascii_strcasecmp(s.t[0], "IconsOnly") == 0)
1859 tb->icons_only = str2num(bool_pair, s.t[1], 0);
1860 else if (g_ascii_strcasecmp(s.t[0], "AcceptSkipPager") == 0) /* For backward compatibility */
1861 ;
1862 else if (g_ascii_strcasecmp(s.t[0], "ShowIconified") == 0) /* For backward compatibility */
1863 ;
1864 else if (g_ascii_strcasecmp(s.t[0], "ShowMapped") == 0) /* For backward compatibility */
1865 ;
1866 else if (g_ascii_strcasecmp(s.t[0], "ShowAllDesks") == 0)
1867 tb->show_all_desks = str2num(bool_pair, s.t[1], 0);
1868 else if (g_ascii_strcasecmp(s.t[0], "MaxTaskWidth") == 0)
1869 tb->task_width_max = atoi(s.t[1]);
1870 else if (g_ascii_strcasecmp(s.t[0], "spacing") == 0)
1871 tb->spacing = atoi(s.t[1]);
1872 else if (g_ascii_strcasecmp(s.t[0], "UseMouseWheel") == 0)
1873 tb->use_mouse_wheel = str2num(bool_pair, s.t[1], 1);
1874 else if (g_ascii_strcasecmp(s.t[0], "UseUrgencyHint") == 0)
1875 tb->use_urgency_hint = str2num(bool_pair, s.t[1], 1);
1876 else if (g_ascii_strcasecmp(s.t[0], "FlatButton") == 0)
1877 tb->flat_button = str2num(bool_pair, s.t[1], 1);
1878 else if (g_ascii_strcasecmp(s.t[0], "GroupedTasks") == 0)
1879 tb->grouped_tasks = str2num(bool_pair, s.t[1], 1);
1880 else
1881 ERR( "taskbar: unknown var %s\n", s.t[0]);
1882 }
1883 else
1884 {
1885 ERR( "taskbar: illegal in this context %s\n", s.str);
1886 return 0;
1887 }
1888 }
1889 }
1890
1891 /* Build the graphic elements. */
1892 taskbar_build_gui(p);
1893
1894 /* Fetch the client list and redraw the taskbar. Then determine what window has focus. */
1895 taskbar_net_client_list(NULL, tb);
1896 taskbar_net_active_window(NULL, tb);
1897 return 1;
1898 }
1899
1900 /* Plugin destructor. */
1901 static void taskbar_destructor(Plugin * p)
1902 {
1903 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1904
1905 /* Remove GDK event filter. */
1906 gdk_window_remove_filter(NULL, (GdkFilterFunc) taskbar_event_filter, tb);
1907
1908 /* Remove root window signal handlers. */
1909 g_signal_handlers_disconnect_by_func(G_OBJECT(fbev), taskbar_net_current_desktop, tb);
1910 g_signal_handlers_disconnect_by_func(G_OBJECT(fbev), taskbar_net_active_window, tb);
1911 g_signal_handlers_disconnect_by_func(G_OBJECT(fbev), taskbar_net_number_of_desktops, tb);
1912 g_signal_handlers_disconnect_by_func(G_OBJECT(fbev), taskbar_net_client_list, tb);
1913
1914 /* Deallocate task list. */
1915 while (tb->task_list != NULL)
1916 task_delete(tb, tb->task_list, TRUE);
1917
1918 /* Deallocate class list. */
1919 while (tb->res_class_list != NULL)
1920 {
1921 TaskClass * tc = tb->res_class_list;
1922 tb->res_class_list = tc->res_class_flink;
1923 g_free(tc->res_class);
1924 g_free(tc);
1925 }
1926
1927 /* Deallocate other memory. */
1928 gtk_widget_destroy(tb->menu);
1929 g_free(tb);
1930 }
1931
1932 /* Callback from configuration dialog mechanism to apply the configuration. */
1933 static void taskbar_apply_configuration(Plugin * p)
1934 {
1935 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1936
1937 /* Update style on taskbar. */
1938 taskbar_update_style(tb);
1939
1940 /* Update styles on each button. */
1941 Task * tk;
1942 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
1943 task_update_style(tk, tb);
1944
1945 /* Refetch the client list and redraw. */
1946 recompute_group_visibility_on_current_desktop(tb);
1947 taskbar_net_client_list(NULL, tb);
1948 }
1949
1950 /* Display the configuration dialog. */
1951 static void taskbar_configure(Plugin * p, GtkWindow * parent)
1952 {
1953 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1954 GtkWidget* dlg = create_generic_config_dlg(
1955 _(p->class->name),
1956 GTK_WIDGET(parent),
1957 (GSourceFunc) taskbar_apply_configuration, (gpointer) p,
1958 _("Show tooltips"), &tb->tooltips, CONF_TYPE_BOOL,
1959 _("Icons only"), &tb->icons_only, CONF_TYPE_BOOL,
1960 _("Flat buttons"), &tb->flat_button, CONF_TYPE_BOOL,
1961 _("Show windows from all desktops"), &tb->show_all_desks, CONF_TYPE_BOOL,
1962 _("Use mouse wheel"), &tb->use_mouse_wheel, CONF_TYPE_BOOL,
1963 _("Flash when there is any window requiring attention"), &tb->use_urgency_hint, CONF_TYPE_BOOL,
1964 _("Combine multiple application windows into a single button"), &tb->grouped_tasks, CONF_TYPE_BOOL,
1965 _("Maximum width of task button"), &tb->task_width_max, CONF_TYPE_INT,
1966 _("Spacing"), &tb->spacing, CONF_TYPE_INT,
1967 NULL);
1968 gtk_window_present(GTK_WINDOW(dlg));
1969 }
1970
1971 /* Save the configuration to the configuration file. */
1972 static void taskbar_save_configuration(Plugin * p, FILE * fp)
1973 {
1974 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1975 lxpanel_put_bool(fp, "tooltips", tb->tooltips);
1976 lxpanel_put_bool(fp, "IconsOnly", tb->icons_only);
1977 lxpanel_put_bool(fp, "ShowAllDesks", tb->show_all_desks);
1978 lxpanel_put_bool(fp, "UseMouseWheel", tb->use_mouse_wheel);
1979 lxpanel_put_bool(fp, "UseUrgencyHint", tb->use_urgency_hint);
1980 lxpanel_put_bool(fp, "FlatButton", tb->flat_button);
1981 lxpanel_put_int(fp, "MaxTaskWidth", tb->task_width_max);
1982 lxpanel_put_int(fp, "spacing", tb->spacing);
1983 lxpanel_put_bool(fp, "GroupedTasks", tb->grouped_tasks);
1984 }
1985
1986 /* Callback when panel configuration changes. */
1987 static void taskbar_panel_configuration_changed(Plugin * p)
1988 {
1989 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1990 taskbar_update_style(tb);
1991 taskbar_make_menu(tb);
1992 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
1993 icon_grid_set_geometry(tb->icon_grid, bo,
1994 ((tb->icons_only) ? tb->plug->panel->icon_size + ICON_ONLY_EXTRA : tb->task_width_max), tb->plug->panel->icon_size + BUTTON_HEIGHT_EXTRA,
1995 tb->spacing, 0, tb->plug->panel->height);
1996
1997 /* If the icon size changed, refetch all the icons. */
1998 if (tb->plug->panel->icon_size != tb->icon_size)
1999 {
2000 tb->icon_size = tb->plug->panel->icon_size;
2001 Task * tk;
2002 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
2003 {
2004 GdkPixbuf * pixbuf = task_update_icon(tb, tk, None);
2005 if (pixbuf != NULL)
2006 {
2007 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
2008 g_object_unref(pixbuf);
2009 }
2010 }
2011 }
2012
2013 /* Redraw all the labels. Icon size or font color may have changed. */
2014 taskbar_redraw(tb);
2015 }
2016
2017 /* Plugin descriptor. */
2018 PluginClass taskbar_plugin_class = {
2019
2020 PLUGINCLASS_VERSIONING,
2021
2022 type : "taskbar",
2023 name : N_("Task Bar (Window List)"),
2024 version: "1.0",
2025 description : N_("Taskbar shows all opened windows and allow to iconify them, shade or get focus"),
2026
2027 /* Stretch is available and default for this plugin. */
2028 expand_available : TRUE,
2029 expand_default : TRUE,
2030
2031 constructor : taskbar_constructor,
2032 destructor : taskbar_destructor,
2033 config : taskbar_configure,
2034 save : taskbar_save_configuration,
2035 panel_configuration_changed : taskbar_panel_configuration_changed
2036 };
2037