Adding upstream version 0.5.8.
[debian/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 gboolean net_active_checked; /* True if use_net_active is valid */
114 } TaskbarPlugin;
115
116 static gchar *taskbar_rc = "style 'taskbar-style'\n"
117 "{\n"
118 "GtkWidget::focus-padding=0\n" /* FIXME: seem to fix #2821771, not sure if this is ok. */
119 "GtkWidget::focus-line-width=0\n"
120 "GtkWidget::focus-padding=0\n"
121 "GtkButton::default-border={0,0,0,0}\n"
122 "GtkButton::default-outside-border={0,0,0,0}\n"
123 "GtkButton::inner-border={0,0,0,0}\n" /* added in gtk+ 2.10 */
124 "}\n"
125 "widget '*.taskbar.*' style 'taskbar-style'";
126
127 #define DRAG_ACTIVE_DELAY 1000
128 #define TASK_WIDTH_MAX 200
129 #define TASK_PADDING 4
130 #define ALL_WORKSPACES 0xFFFFFFFF /* 64-bit clean */
131 #define ICON_ONLY_EXTRA 6 /* Amount needed to have button lay out symmetrically */
132 #define BUTTON_HEIGHT_EXTRA 4 /* Amount needed to have button not clip icon */
133
134 static void set_timer_on_task(Task * tk);
135 static gboolean task_is_visible_on_current_desktop(TaskbarPlugin * tb, Task * tk);
136 static void recompute_group_visibility_for_class(TaskbarPlugin * tb, TaskClass * tc);
137 static void recompute_group_visibility_on_current_desktop(TaskbarPlugin * tb);
138 static void task_draw_label(Task * tk);
139 static gboolean task_is_visible(TaskbarPlugin * tb, Task * tk);
140 static void task_button_redraw(Task * tk, TaskbarPlugin * tb);
141 static void taskbar_redraw(TaskbarPlugin * tb);
142 static gboolean accept_net_wm_state(NetWMState * nws);
143 static gboolean accept_net_wm_window_type(NetWMWindowType * nwwt);
144 static void task_free_names(Task * tk);
145 static void task_set_names(Task * tk, Atom source);
146 static void task_unlink_class(Task * tk);
147 static TaskClass * taskbar_enter_res_class(TaskbarPlugin * tb, char * res_class, gboolean * name_consumed);
148 static void task_set_class(Task * tk);
149 static Task * task_lookup(TaskbarPlugin * tb, Window win);
150 static void task_delete(TaskbarPlugin * tb, Task * tk, gboolean unlink);
151 static GdkPixbuf * _wnck_gdk_pixbuf_get_from_pixmap(Pixmap xpixmap, int width, int height);
152 static GdkPixbuf * apply_mask(GdkPixbuf * pixbuf, GdkPixbuf * mask);
153 static GdkPixbuf * get_wm_icon(Window task_win, int required_width, int required_height, Atom source, Atom * current_source);
154 static GdkPixbuf * task_update_icon(TaskbarPlugin * tb, Task * tk, Atom source);
155 static gboolean flash_window_timeout(Task * tk);
156 static void task_set_urgency(Task * tk);
157 static void task_clear_urgency(Task * tk);
158 static void task_raise_window(Task * tk, guint32 time);
159 static void taskbar_popup_set_position(GtkWidget * menu, gint * px, gint * py, gboolean * push_in, gpointer data);
160 static void task_group_menu_destroy(TaskbarPlugin * tb);
161 static gboolean taskbar_task_control_event(GtkWidget * widget, GdkEventButton * event, Task * tk, gboolean popup_menu);
162 static gboolean taskbar_button_press_event(GtkWidget * widget, GdkEventButton * event, Task * tk);
163 static gboolean taskbar_popup_activate_event(GtkWidget * widget, GdkEventButton * event, Task * tk);
164 static gboolean taskbar_button_drag_motion_timeout(Task * tk);
165 static gboolean taskbar_button_drag_motion(GtkWidget * widget, GdkDragContext * drag_context, gint x, gint y, guint time, Task * tk);
166 static void taskbar_button_drag_leave(GtkWidget * widget, GdkDragContext * drag_context, 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_window_manager_changed(GdkScreen * screen, TaskbarPlugin * tb);
189 static void taskbar_build_gui(Plugin * p);
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 flashing_task->flash_timeout = 0;
281 }
282 }
283 }
284
285 /* Recompute the visible task for all classes when the desktop changes. */
286 static void recompute_group_visibility_on_current_desktop(TaskbarPlugin * tb)
287 {
288 TaskClass * tc;
289 for (tc = tb->res_class_list; tc != NULL; tc = tc->res_class_flink)
290 {
291 recompute_group_visibility_for_class(tb, tc);
292 }
293 }
294
295 /* Draw the label and tooltip on a taskbar button. */
296 static void task_draw_label(Task * tk)
297 {
298 TaskClass * tc = tk->res_class;
299 gboolean bold_style = (((tk->entered_state) || (tk->flash_state)) && (tk->tb->flat_button));
300 if ((tk->tb->grouped_tasks) && (tc != NULL) && (tc->visible_task == tk) && (tc->visible_count > 1))
301 {
302 char * label = g_strdup_printf("(%d) %s", tc->visible_count, tc->visible_name);
303 gtk_widget_set_tooltip_text(tk->button, label);
304 panel_draw_label_text(tk->tb->plug->panel, tk->label, label, bold_style, tk->tb->flat_button);
305 g_free(label);
306 }
307 else
308 {
309 char * name = tk->iconified ? tk->name_iconified : tk->name;
310 if (tk->tb->tooltips)
311 gtk_widget_set_tooltip_text(tk->button, name);
312 panel_draw_label_text(tk->tb->plug->panel, tk->label, name, bold_style, tk->tb->flat_button);
313 }
314 }
315
316 /* Determine if a task is visible. */
317 static gboolean task_is_visible(TaskbarPlugin * tb, Task * tk)
318 {
319 /* Not visible due to grouping. */
320 if ((tb->grouped_tasks) && (tk->res_class != NULL) && (tk->res_class->visible_task != tk))
321 return FALSE;
322
323 /* Desktop placement. */
324 return task_is_visible_on_current_desktop(tb, tk);
325 }
326
327 /* Redraw a task button. */
328 static void task_button_redraw(Task * tk, TaskbarPlugin * tb)
329 {
330 if (task_is_visible(tb, tk))
331 {
332 task_draw_label(tk);
333 icon_grid_set_visible(tb->icon_grid, tk->button, TRUE);
334 }
335 else
336 icon_grid_set_visible(tb->icon_grid, tk->button, FALSE);
337 }
338
339 /* Redraw all tasks in the taskbar. */
340 static void taskbar_redraw(TaskbarPlugin * tb)
341 {
342 Task * tk;
343 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
344 task_button_redraw(tk, tb);
345 }
346
347 /* Determine if a task should be visible given its NET_WM_STATE. */
348 static gboolean accept_net_wm_state(NetWMState * nws)
349 {
350 return ( ! (nws->skip_taskbar));
351 }
352
353 /* Determine if a task should be visible given its NET_WM_WINDOW_TYPE. */
354 static gboolean accept_net_wm_window_type(NetWMWindowType * nwwt)
355 {
356 return ( ! ((nwwt->desktop) || (nwwt->dock) || (nwwt->splash)));
357 }
358
359 /* Free the names associated with a task. */
360 static void task_free_names(Task * tk)
361 {
362 g_free(tk->name);
363 g_free(tk->name_iconified);
364 tk->name = tk->name_iconified = NULL;
365 }
366
367 /* Set the names associated with a task.
368 * This is expected to be the same as the title the window manager is displaying. */
369 static void task_set_names(Task * tk, Atom source)
370 {
371 char * name = NULL;
372
373 /* Try _NET_WM_VISIBLE_NAME, which supports UTF-8.
374 * If it is set, the window manager is displaying it as the window title. */
375 if ((source == None) || (source == a_NET_WM_VISIBLE_NAME))
376 {
377 name = get_utf8_property(tk->win, a_NET_WM_VISIBLE_NAME);
378 if (name != NULL)
379 tk->name_source = a_NET_WM_VISIBLE_NAME;
380 }
381
382 /* Try _NET_WM_NAME, which supports UTF-8, but do not overwrite _NET_WM_VISIBLE_NAME. */
383 if ((name == NULL)
384 && ((source == None) || (source == a_NET_WM_NAME))
385 && ((tk->name_source == None) || (tk->name_source == a_NET_WM_NAME) || (tk->name_source == XA_WM_NAME)))
386 {
387 name = get_utf8_property(tk->win, a_NET_WM_NAME);
388 if (name != NULL)
389 tk->name_source = a_NET_WM_NAME;
390 }
391
392 /* Try WM_NAME, which supports only ISO-8859-1, but do not overwrite _NET_WM_VISIBLE_NAME or _NET_WM_NAME. */
393 if ((name == NULL)
394 && ((source == None) || (source == XA_WM_NAME))
395 && ((tk->name_source == None) || (tk->name_source == XA_WM_NAME)))
396 {
397 name = get_textproperty(tk->win, XA_WM_NAME);
398 if (name != NULL)
399 tk->name_source = XA_WM_NAME;
400 }
401
402 /* Set the name into the task context, and also on the tooltip. */
403 if (name != NULL)
404 {
405 task_free_names(tk);
406 tk->name = g_strdup(name);
407 tk->name_iconified = g_strdup_printf("[%s]", name);
408 g_free(name);
409
410 /* Redraw the button. */
411 task_button_redraw(tk, tk->tb);
412 }
413 }
414
415 /* Unlink a task from the class list because its class changed or it was deleted. */
416 static void task_unlink_class(Task * tk)
417 {
418 TaskClass * tc = tk->res_class;
419 if (tc != NULL)
420 {
421 /* Remove from per-class task list. */
422 if (tc->res_class_head == tk)
423 {
424 /* Removing the head of the list. This causes a new task to be the visible task, so we redraw. */
425 tc->res_class_head = tk->res_class_flink;
426 if (tc->res_class_head != NULL)
427 task_button_redraw(tc->res_class_head, tk->tb);
428 }
429 else
430 {
431 /* Locate the task and its predecessor in the list and then remove it. For safety, ensure it is found. */
432 Task * tk_pred = NULL;
433 Task * tk_cursor;
434 for (
435 tk_cursor = tc->res_class_head;
436 ((tk_cursor != NULL) && (tk_cursor != tk));
437 tk_pred = tk_cursor, tk_cursor = tk_cursor->res_class_flink) ;
438 if (tk_cursor == tk)
439 tk_pred->res_class_flink = tk->res_class_flink;
440 }
441
442 /* Recompute group visibility. */
443 recompute_group_visibility_for_class(tk->tb, tc);
444 }
445 }
446
447 /* Enter class with specified name. */
448 static TaskClass * taskbar_enter_res_class(TaskbarPlugin * tb, char * res_class, gboolean * name_consumed)
449 {
450 /* Find existing entry or insertion point. */
451 *name_consumed = FALSE;
452 TaskClass * tc_pred = NULL;
453 TaskClass * tc;
454 for (tc = tb->res_class_list; tc != NULL; tc_pred = tc, tc = tc->res_class_flink)
455 {
456 int status = strcmp(res_class, tc->res_class);
457 if (status == 0)
458 return tc;
459 if (status < 0)
460 break;
461 }
462
463 /* Insert new entry. */
464 tc = g_new0(TaskClass, 1);
465 tc->res_class = res_class;
466 *name_consumed = TRUE;
467 if (tc_pred == NULL)
468 {
469 tc->res_class_flink = tb->res_class_list;
470 tb->res_class_list = tc;
471 }
472 else
473 {
474 tc->res_class_flink = tc_pred->res_class_flink;
475 tc_pred->res_class_flink = tc;
476 }
477 return tc;
478 }
479
480 /* Set the class associated with a task. */
481 static void task_set_class(Task * tk)
482 {
483 /* Read the WM_CLASS property. */
484 XClassHint ch;
485 ch.res_name = NULL;
486 ch.res_class = NULL;
487 XGetClassHint(GDK_DISPLAY(), tk->win, &ch);
488
489 /* If the res_name was returned, free it. We make no use of it at this time. */
490 if (ch.res_name != NULL)
491 {
492 XFree(ch.res_name);
493 }
494
495 /* If the res_class was returned, process it.
496 * This identifies the application that created the window and is the basis for taskbar grouping. */
497 if (ch.res_class != NULL)
498 {
499 /* Convert the class to UTF-8 and enter it in the class table. */
500 gchar * res_class = g_locale_to_utf8(ch.res_class, -1, NULL, NULL, NULL);
501 if (res_class != NULL)
502 {
503 gboolean name_consumed;
504 TaskClass * tc = taskbar_enter_res_class(tk->tb, res_class, &name_consumed);
505 if ( ! name_consumed) g_free(res_class);
506
507 /* If the task changed class, update data structures. */
508 TaskClass * old_tc = tk->res_class;
509 if (old_tc != tc)
510 {
511 /* Unlink from previous class, if any. */
512 task_unlink_class(tk);
513
514 /* Add to end of per-class task list. Do this to keep the popup menu in order of creation. */
515 if (tc->res_class_head == NULL)
516 tc->res_class_head = tk;
517 else
518 {
519 Task * tk_pred;
520 for (tk_pred = tc->res_class_head; tk_pred->res_class_flink != NULL; tk_pred = tk_pred->res_class_flink) ;
521 tk_pred->res_class_flink = tk;
522 task_button_redraw(tk, tk->tb);
523 }
524 tk->res_class = tc;
525
526 /* Recompute group visibility. */
527 recompute_group_visibility_for_class(tk->tb, tc);
528 }
529 }
530 XFree(ch.res_class);
531 }
532 }
533
534 /* Look up a task in the task list. */
535 static Task * task_lookup(TaskbarPlugin * tb, Window win)
536 {
537 Task * tk;
538 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
539 {
540 if (tk->win == win)
541 return tk;
542 if (tk->win > win)
543 break;
544 }
545 return NULL;
546 }
547
548 /* Delete a task and optionally unlink it from the task list. */
549 static void task_delete(TaskbarPlugin * tb, Task * tk, gboolean unlink)
550 {
551 /* If we think this task had focus, remove that. */
552 if (tb->focused == tk)
553 tb->focused = NULL;
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 /* Deallocate structures. */
560 icon_grid_remove(tb->icon_grid, tk->button);
561 task_free_names(tk);
562 task_unlink_class(tk);
563
564 /* If requested, unlink the task from the task list.
565 * If not requested, the caller will do this. */
566 if (unlink)
567 {
568 if (tb->task_list == tk)
569 tb->task_list = tk->task_flink;
570 else
571 {
572 /* Locate the task and its predecessor in the list and then remove it. For safety, ensure it is found. */
573 Task * tk_pred = NULL;
574 Task * tk_cursor;
575 for (
576 tk_cursor = tb->task_list;
577 ((tk_cursor != NULL) && (tk_cursor != tk));
578 tk_pred = tk_cursor, tk_cursor = tk_cursor->task_flink) ;
579 if (tk_cursor == tk)
580 tk_pred->task_flink = tk->task_flink;
581 }
582 }
583
584 /* Deallocate the task structure. */
585 g_free(tk);
586 }
587
588 /* Get a pixbuf from a pixmap.
589 * Originally from libwnck, Copyright (C) 2001 Havoc Pennington. */
590 static GdkPixbuf * _wnck_gdk_pixbuf_get_from_pixmap(Pixmap xpixmap, int width, int height)
591 {
592 /* Get the drawable. */
593 GdkDrawable * drawable = gdk_xid_table_lookup(xpixmap);
594 if (drawable != NULL)
595 g_object_ref(G_OBJECT(drawable));
596 else
597 drawable = gdk_pixmap_foreign_new(xpixmap);
598
599 GdkColormap * colormap = NULL;
600 GdkPixbuf * retval = NULL;
601 if (drawable != NULL)
602 {
603 /* Get the colormap.
604 * If the drawable has no colormap, use no colormap or the system colormap as recommended in the documentation of gdk_drawable_get_colormap. */
605 colormap = gdk_drawable_get_colormap(drawable);
606 gint depth = gdk_drawable_get_depth(drawable);
607 if (colormap != NULL)
608 g_object_ref(G_OBJECT(colormap));
609 else if (depth == 1)
610 colormap = NULL;
611 else
612 {
613 colormap = gdk_screen_get_system_colormap(gdk_drawable_get_screen(drawable));
614 g_object_ref(G_OBJECT(colormap));
615 }
616
617 /* Be sure we aren't going to fail due to visual mismatch. */
618 #if GTK_CHECK_VERSION(2,22,0)
619 if ((colormap != NULL) && (gdk_visual_get_depth(gdk_colormap_get_visual(colormap)) != depth))
620 #else
621 if ((colormap != NULL) && (gdk_colormap_get_visual(colormap)->depth != depth))
622 #endif
623 {
624 g_object_unref(G_OBJECT(colormap));
625 colormap = NULL;
626 }
627
628 /* Do the major work. */
629 retval = gdk_pixbuf_get_from_drawable(NULL, drawable, colormap, 0, 0, 0, 0, width, height);
630 }
631
632 /* Clean up and return. */
633 if (colormap != NULL)
634 g_object_unref(G_OBJECT(colormap));
635 if (drawable != NULL)
636 g_object_unref(G_OBJECT(drawable));
637 return retval;
638 }
639
640 /* Apply a mask to a pixbuf.
641 * Originally from libwnck, Copyright (C) 2001 Havoc Pennington. */
642 static GdkPixbuf * apply_mask(GdkPixbuf * pixbuf, GdkPixbuf * mask)
643 {
644 /* Initialize. */
645 int w = MIN(gdk_pixbuf_get_width(mask), gdk_pixbuf_get_width(pixbuf));
646 int h = MIN(gdk_pixbuf_get_height(mask), gdk_pixbuf_get_height(pixbuf));
647 GdkPixbuf * with_alpha = gdk_pixbuf_add_alpha(pixbuf, FALSE, 0, 0, 0);
648 guchar * dst = gdk_pixbuf_get_pixels(with_alpha);
649 guchar * src = gdk_pixbuf_get_pixels(mask);
650 int dst_stride = gdk_pixbuf_get_rowstride(with_alpha);
651 int src_stride = gdk_pixbuf_get_rowstride(mask);
652
653 /* Loop to do the work. */
654 int i;
655 for (i = 0; i < h; i += 1)
656 {
657 int j;
658 for (j = 0; j < w; j += 1)
659 {
660 guchar * s = src + i * src_stride + j * 3;
661 guchar * d = dst + i * dst_stride + j * 4;
662
663 /* s[0] == s[1] == s[2], they are 255 if the bit was set, 0 otherwise. */
664 d[3] = ((s[0] == 0) ? 0 : 255); /* 0 = transparent, 255 = opaque */
665 }
666 }
667
668 return with_alpha;
669 }
670
671 /* Get an icon from the window manager for a task, and scale it to a specified size. */
672 static GdkPixbuf * get_wm_icon(Window task_win, int required_width, int required_height, Atom source, Atom * current_source)
673 {
674 /* The result. */
675 GdkPixbuf * pixmap = NULL;
676 Atom possible_source = None;
677 int result = -1;
678
679 if ((source == None) || (source == a_NET_WM_ICON))
680 {
681 /* Important Notes:
682 * According to freedesktop.org document:
683 * http://standards.freedesktop.org/wm-spec/wm-spec-1.4.html#id2552223
684 * _NET_WM_ICON contains an array of 32-bit packed CARDINAL ARGB.
685 * However, this is incorrect. Actually it's an array of long integers.
686 * Toolkits like gtk+ use unsigned long here to store icons.
687 * Besides, according to manpage of XGetWindowProperty, when returned format,
688 * is 32, the property data will be stored as an array of longs
689 * (which in a 64-bit application will be 64-bit values that are
690 * padded in the upper 4 bytes).
691 */
692
693 /* Get the window property _NET_WM_ICON, if possible. */
694 Atom type = None;
695 int format;
696 gulong nitems;
697 gulong bytes_after;
698 gulong * data = NULL;
699 result = XGetWindowProperty(
700 GDK_DISPLAY(),
701 task_win,
702 a_NET_WM_ICON,
703 0, G_MAXLONG,
704 False, XA_CARDINAL,
705 &type, &format, &nitems, &bytes_after, (void *) &data);
706
707 /* Inspect the result to see if it is usable. If not, and we got data, free it. */
708 if ((type != XA_CARDINAL) || (nitems <= 0))
709 {
710 if (data != NULL)
711 XFree(data);
712 result = -1;
713 }
714
715 /* If the result is usable, extract the icon from it. */
716 if (result == Success)
717 {
718 /* Get the largest icon available, unless there is one that is the desired size. */
719 /* FIXME: should we try to find an icon whose size is closest to
720 * required_width and required_height to reduce unnecessary resizing? */
721 gulong * pdata = data;
722 gulong * pdata_end = data + nitems;
723 gulong * max_icon = NULL;
724 gulong max_w = 0;
725 gulong max_h = 0;
726 while ((pdata + 2) < pdata_end)
727 {
728 /* Extract the width and height. */
729 gulong w = pdata[0];
730 gulong h = pdata[1];
731 gulong size = w * h;
732 pdata += 2;
733
734 /* Bounds check the icon. */
735 if (pdata + size > pdata_end)
736 break;
737
738 /* Rare special case: the desired size is the same as icon size. */
739 if ((required_width == w) && (required_height == h))
740 {
741 max_icon = pdata;
742 max_w = w;
743 max_h = h;
744 break;
745 }
746
747 /* If the icon is the largest so far, capture it. */
748 if ((w > max_w) && (h > max_h))
749 {
750 max_icon = pdata;
751 max_w = w;
752 max_h = h;
753 }
754 pdata += size;
755 }
756
757 /* If an icon was extracted, convert it to a pixbuf.
758 * Its size is max_w and max_h. */
759 if (max_icon != NULL)
760 {
761 /* Allocate enough space for the pixel data. */
762 gulong len = max_w * max_h;
763 guchar * pixdata = g_new(guchar, len * 4);
764
765 /* Loop to convert the pixel data. */
766 guchar * p = pixdata;
767 int i;
768 for (i = 0; i < len; p += 4, i += 1)
769 {
770 guint argb = max_icon[i];
771 guint rgba = (argb << 8) | (argb >> 24);
772 p[0] = rgba >> 24;
773 p[1] = (rgba >> 16) & 0xff;
774 p[2] = (rgba >> 8) & 0xff;
775 p[3] = rgba & 0xff;
776 }
777
778 /* Initialize a pixmap with the pixel data. */
779 pixmap = gdk_pixbuf_new_from_data(
780 pixdata,
781 GDK_COLORSPACE_RGB,
782 TRUE, 8, /* has_alpha, bits_per_sample */
783 max_w, max_h, max_w * 4,
784 (GdkPixbufDestroyNotify) g_free,
785 NULL);
786 possible_source = a_NET_WM_ICON;
787 }
788 else
789 result = -1;
790
791 /* Free the X property data. */
792 XFree(data);
793 }
794 }
795
796 /* No icon available from _NET_WM_ICON. Next try WM_HINTS, but do not overwrite _NET_WM_ICON. */
797 if ((result != Success) && (*current_source != a_NET_WM_ICON)
798 && ((source == None) || (source != a_NET_WM_ICON)))
799 {
800 XWMHints * hints = XGetWMHints(GDK_DISPLAY(), task_win);
801 result = (hints != NULL) ? Success : -1;
802 Pixmap xpixmap = None;
803 Pixmap xmask = None;
804
805 if (result == Success)
806 {
807 /* WM_HINTS is available. Extract the X pixmap and mask. */
808 if ((hints->flags & IconPixmapHint))
809 xpixmap = hints->icon_pixmap;
810 if ((hints->flags & IconMaskHint))
811 xmask = hints->icon_mask;
812 XFree(hints);
813 if (xpixmap != None)
814 {
815 result = Success;
816 possible_source = XA_WM_HINTS;
817 }
818 else
819 result = -1;
820 }
821
822 if (result != Success)
823 {
824 /* No icon available from _NET_WM_ICON or WM_HINTS. Next try KWM_WIN_ICON. */
825 Atom type = None;
826 int format;
827 gulong nitems;
828 gulong bytes_after;
829 Pixmap *icons = NULL;
830 Atom kwin_win_icon_atom = gdk_x11_get_xatom_by_name("KWM_WIN_ICON");
831 result = XGetWindowProperty(
832 GDK_DISPLAY(),
833 task_win,
834 kwin_win_icon_atom,
835 0, G_MAXLONG,
836 False, kwin_win_icon_atom,
837 &type, &format, &nitems, &bytes_after, (void *) &icons);
838
839 /* Inspect the result to see if it is usable. If not, and we got data, free it. */
840 if (type != kwin_win_icon_atom)
841 {
842 if (icons != NULL)
843 XFree(icons);
844 result = -1;
845 }
846
847 /* If the result is usable, extract the X pixmap and mask from it. */
848 if (result == Success)
849 {
850 xpixmap = icons[0];
851 xmask = icons[1];
852 if (xpixmap != None)
853 {
854 result = Success;
855 possible_source = kwin_win_icon_atom;
856 }
857 else
858 result = -1;
859 }
860 }
861
862 /* If we have an X pixmap, get its geometry.*/
863 unsigned int w, h;
864 if (result == Success)
865 {
866 Window unused_win;
867 int unused;
868 unsigned int unused_2;
869 result = XGetGeometry(
870 GDK_DISPLAY(), xpixmap,
871 &unused_win, &unused, &unused, &w, &h, &unused_2, &unused_2) ? Success : -1;
872 }
873
874 /* If we have an X pixmap and its geometry, convert it to a GDK pixmap. */
875 if (result == Success)
876 {
877 pixmap = _wnck_gdk_pixbuf_get_from_pixmap(xpixmap, w, h);
878 result = ((pixmap != NULL) ? Success : -1);
879 }
880
881 /* If we have success, see if the result needs to be masked.
882 * Failures here are implemented as nonfatal. */
883 if ((result == Success) && (xmask != None))
884 {
885 Window unused_win;
886 int unused;
887 unsigned int unused_2;
888 if (XGetGeometry(
889 GDK_DISPLAY(), xmask,
890 &unused_win, &unused, &unused, &w, &h, &unused_2, &unused_2))
891 {
892 /* Convert the X mask to a GDK pixmap. */
893 GdkPixbuf * mask = _wnck_gdk_pixbuf_get_from_pixmap(xmask, w, h);
894 if (mask != NULL)
895 {
896 /* Apply the mask. */
897 GdkPixbuf * masked_pixmap = apply_mask(pixmap, mask);
898 g_object_unref(G_OBJECT(pixmap));
899 g_object_unref(G_OBJECT(mask));
900 pixmap = masked_pixmap;
901 }
902 }
903 }
904 }
905
906 /* If we got a pixmap, scale it and return it. */
907 if (pixmap == NULL)
908 return NULL;
909 else
910 {
911 GdkPixbuf * ret = gdk_pixbuf_scale_simple(pixmap, required_width, required_height, GDK_INTERP_TILES);
912 g_object_unref(pixmap);
913 *current_source = possible_source;
914 return ret;
915 }
916 }
917
918 /* Update the icon of a task. */
919 static GdkPixbuf * task_update_icon(TaskbarPlugin * tb, Task * tk, Atom source)
920 {
921 /* Get the icon from the window's hints. */
922 GdkPixbuf * pixbuf = get_wm_icon(tk->win, tb->icon_size, tb->icon_size, source, &tk->image_source);
923
924 /* If that fails, and we have no other icon yet, return the fallback icon. */
925 if ((pixbuf == NULL)
926 && ((source == None) || (tk->image_source == None)))
927 {
928 /* Establish the fallback task icon. This is used when no other icon is available. */
929 if (tb->fallback_pixbuf == NULL)
930 tb->fallback_pixbuf = gdk_pixbuf_new_from_xpm_data((const char **) icon_xpm);
931 g_object_ref(tb->fallback_pixbuf);
932 pixbuf = tb->fallback_pixbuf;
933 }
934
935 /* Return what we have. This may be NULL to indicate that no change should be made to the icon. */
936 return pixbuf;
937 }
938
939 /* Timer expiration for urgency notification. Also used to draw the button in setting and clearing urgency. */
940 static gboolean flash_window_timeout(Task * tk)
941 {
942 /* Set state on the button and redraw. */
943 if ( ! tk->tb->flat_button)
944 gtk_widget_set_state(tk->button, tk->flash_state ? GTK_STATE_SELECTED : GTK_STATE_NORMAL);
945 task_draw_label(tk);
946
947 /* Complement the flashing context. */
948 tk->flash_state = ! tk->flash_state;
949 return TRUE;
950 }
951
952 /* Set urgency notification. */
953 static void task_set_urgency(Task * tk)
954 {
955 TaskbarPlugin * tb = tk->tb;
956 TaskClass * tc = tk->res_class;
957 if ((tb->grouped_tasks) && (tc != NULL) && (tc->visible_count > 1))
958 recompute_group_visibility_for_class(tk->tb, tk->res_class);
959 else
960 {
961 /* Set the flashing context and flash the window immediately. */
962 tk->flash_state = TRUE;
963 flash_window_timeout(tk);
964
965 /* Set the timer if none is set. */
966 if (tk->flash_timeout == 0)
967 set_timer_on_task(tk);
968 }
969 }
970
971 /* Clear urgency notification. */
972 static void task_clear_urgency(Task * tk)
973 {
974 TaskbarPlugin * tb = tk->tb;
975 TaskClass * tc = tk->res_class;
976 if ((tb->grouped_tasks) && (tc != NULL) && (tc->visible_count > 1))
977 recompute_group_visibility_for_class(tk->tb, tk->res_class);
978 else
979 {
980 /* Remove the timer if one is set. */
981 if (tk->flash_timeout != 0)
982 {
983 g_source_remove(tk->flash_timeout);
984 tk->flash_timeout = 0;
985 }
986
987 /* Clear the flashing context and unflash the window immediately. */
988 tk->flash_state = FALSE;
989 flash_window_timeout(tk);
990 tk->flash_state = FALSE;
991 }
992 }
993
994 /* Do the proper steps to raise a window.
995 * This means removing it from iconified state and bringing it to the front.
996 * We also switch the active desktop and viewport if needed. */
997 static void task_raise_window(Task * tk, guint32 time)
998 {
999 /* Change desktop if needed. */
1000 if ((tk->desktop != ALL_WORKSPACES) && (tk->desktop != tk->tb->current_desktop))
1001 Xclimsg(GDK_ROOT_WINDOW(), a_NET_CURRENT_DESKTOP, tk->desktop, 0, 0, 0, 0);
1002
1003 /* Evaluate use_net_active if not yet done. */
1004 if ( ! tk->tb->net_active_checked)
1005 {
1006 TaskbarPlugin * tb = tk->tb;
1007 GdkAtom net_active_atom = gdk_x11_xatom_to_atom(a_NET_ACTIVE_WINDOW);
1008 tb->use_net_active = gdk_x11_screen_supports_net_wm_hint(gtk_widget_get_screen(tb->plug->pwid), net_active_atom);
1009 tb->net_active_checked = TRUE;
1010 }
1011
1012 /* Raise the window. We can use NET_ACTIVE_WINDOW if the window manager supports it.
1013 * Otherwise, do it the old way with XMapRaised and XSetInputFocus. */
1014 if (tk->tb->use_net_active)
1015 Xclimsg(tk->win, a_NET_ACTIVE_WINDOW, 2, time, 0, 0, 0);
1016 else
1017 {
1018 GdkWindow * gdkwindow = gdk_xid_table_lookup(tk->win);
1019 if (gdkwindow != NULL)
1020 gdk_window_show(gdkwindow);
1021 else
1022 XMapRaised(GDK_DISPLAY(), tk->win);
1023
1024 /* There is a race condition between the X server actually executing the XMapRaised and this code executing XSetInputFocus.
1025 * If the window is not viewable, the XSetInputFocus will fail with BadMatch. */
1026 XWindowAttributes attr;
1027 XGetWindowAttributes(GDK_DISPLAY(), tk->win, &attr);
1028 if (attr.map_state == IsViewable)
1029 XSetInputFocus(GDK_DISPLAY(), tk->win, RevertToNone, time);
1030 }
1031
1032 /* Change viewport if needed. */
1033 XWindowAttributes xwa;
1034 XGetWindowAttributes(GDK_DISPLAY(), tk->win, &xwa);
1035 Xclimsg(tk->win, a_NET_DESKTOP_VIEWPORT, xwa.x, xwa.y, 0, 0, 0);
1036 }
1037
1038 /* Position-calculation callback for grouped-task and window-management popup menu. */
1039 static void taskbar_popup_set_position(GtkWidget * menu, gint * px, gint * py, gboolean * push_in, gpointer data)
1040 {
1041 Task * tk = (Task *) data;
1042
1043 /* Get the allocation of the popup menu. */
1044 GtkRequisition popup_req;
1045 gtk_widget_size_request(menu, &popup_req);
1046
1047 /* Determine the coordinates. */
1048 plugin_popup_set_position_helper(tk->tb->plug, tk->button, menu, &popup_req, px, py);
1049 *push_in = TRUE;
1050 }
1051
1052 /* Remove the grouped-task popup menu from the screen. */
1053 static void task_group_menu_destroy(TaskbarPlugin * tb)
1054 {
1055 if (tb->group_menu != NULL)
1056 {
1057 gtk_widget_destroy(tb->group_menu);
1058 tb->group_menu = NULL;
1059 }
1060 }
1061
1062 /* Handler for "button-press-event" event from taskbar button,
1063 * or "activate" event from grouped-task popup menu item. */
1064 static gboolean taskbar_task_control_event(GtkWidget * widget, GdkEventButton * event, Task * tk, gboolean popup_menu)
1065 {
1066 TaskbarPlugin * tb = tk->tb;
1067 TaskClass * tc = tk->res_class;
1068 if ((tb->grouped_tasks) && (tc != NULL) && (tc->visible_count > 1) && (GTK_IS_BUTTON(widget)))
1069 {
1070 /* If this is a grouped-task representative, meaning that there is a class with at least two windows,
1071 * bring up a popup menu listing all the class members. */
1072 GtkWidget * menu = gtk_menu_new();
1073 Task * tk_cursor;
1074 for (tk_cursor = tc->res_class_head; tk_cursor != NULL; tk_cursor = tk_cursor->res_class_flink)
1075 {
1076 if (task_is_visible_on_current_desktop(tb, tk_cursor))
1077 {
1078 /* The menu item has the name, or the iconified name, and the icon of the application window. */
1079 GtkWidget * mi = gtk_image_menu_item_new_with_label(((tk_cursor->iconified) ? tk_cursor->name_iconified : tk_cursor->name));
1080 GtkWidget * im = gtk_image_new_from_pixbuf(gtk_image_get_pixbuf(GTK_IMAGE(tk_cursor->image)));
1081 gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(mi), im);
1082 g_signal_connect(mi, "button_press_event", G_CALLBACK(taskbar_popup_activate_event), (gpointer) tk_cursor);
1083 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1084 }
1085 }
1086
1087 /* Show the menu. Set context so we can find the menu later to dismiss it.
1088 * Use a position-calculation callback to get the menu nicely positioned with respect to the button. */
1089 gtk_widget_show_all(menu);
1090 tb->group_menu = menu;
1091 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, (GtkMenuPositionFunc) taskbar_popup_set_position, (gpointer) tk, event->button, event->time);
1092 }
1093 else
1094 {
1095 /* Not a grouped-task representative, or entered from the grouped-task popup menu. */
1096 Task * visible_task = (((tk->res_class == NULL) || ( ! tk->tb->grouped_tasks)) ? tk : tk->res_class->visible_task);
1097 task_group_menu_destroy(tb);
1098
1099 if (event->button == 1)
1100 {
1101 /* Left button.
1102 * If the task is iconified, raise it.
1103 * If the task is not iconified and has focus, iconify it.
1104 * If the task is not iconified and does not have focus, raise it. */
1105 if (tk->iconified)
1106 task_raise_window(tk, event->time);
1107 else if ((tk->focused) || (tk == tb->focused_previous))
1108 XIconifyWindow(GDK_DISPLAY(), tk->win, DefaultScreen(GDK_DISPLAY()));
1109 else
1110 task_raise_window(tk, event->time);
1111 }
1112 else if (event->button == 2)
1113 {
1114 /* Middle button. Toggle the shaded state of the window. */
1115 Xclimsg(tk->win, a_NET_WM_STATE,
1116 2, /* a_NET_WM_STATE_TOGGLE */
1117 a_NET_WM_STATE_SHADED,
1118 0, 0, 0);
1119 }
1120 else if (event->button == 3)
1121 {
1122 /* Right button. Bring up the window state popup menu. */
1123 tk->tb->menutask = tk;
1124 gtk_menu_popup(
1125 GTK_MENU(tb->menu),
1126 NULL, NULL,
1127 (GtkMenuPositionFunc) taskbar_popup_set_position, (gpointer) visible_task,
1128 event->button, event->time);
1129 }
1130 }
1131
1132 /* As a matter of policy, avoid showing selected or prelight states on flat buttons. */
1133 if (tb->flat_button)
1134 gtk_widget_set_state(widget, GTK_STATE_NORMAL);
1135 return TRUE;
1136 }
1137
1138 /* Handler for "button-press-event" event from taskbar button. */
1139 static gboolean taskbar_button_press_event(GtkWidget * widget, GdkEventButton * event, Task * tk)
1140 {
1141 return taskbar_task_control_event(widget, event, tk, FALSE);
1142 }
1143
1144 /* Handler for "activate" event from grouped-task popup menu item. */
1145 static gboolean taskbar_popup_activate_event(GtkWidget * widget, GdkEventButton * event, Task * tk)
1146 {
1147 return taskbar_task_control_event(widget, event, tk, TRUE);
1148 }
1149
1150 /* Handler for "drag-motion" timeout. */
1151 static gboolean taskbar_button_drag_motion_timeout(Task * tk)
1152 {
1153 guint time = gtk_get_current_event_time();
1154 task_raise_window(tk, ((time != 0) ? time : CurrentTime));
1155 tk->tb->dnd_delay_timer = 0;
1156 return FALSE;
1157 }
1158
1159 /* Handler for "drag-motion" event from taskbar button. */
1160 static gboolean taskbar_button_drag_motion(GtkWidget * widget, GdkDragContext * drag_context, gint x, gint y, guint time, Task * tk)
1161 {
1162 /* Prevent excessive motion notification. */
1163 if (tk->tb->dnd_delay_timer == 0)
1164 tk->tb->dnd_delay_timer = g_timeout_add(DRAG_ACTIVE_DELAY, (GSourceFunc) taskbar_button_drag_motion_timeout, tk);
1165 gdk_drag_status(drag_context, 0, time);
1166 return TRUE;
1167 }
1168
1169 /* Handler for "drag-leave" event from taskbar button. */
1170 static void taskbar_button_drag_leave(GtkWidget * widget, GdkDragContext * drag_context, guint time, Task * tk)
1171 {
1172 /* Cancel the timer if set. */
1173 if (tk->tb->dnd_delay_timer != 0)
1174 {
1175 g_source_remove(tk->tb->dnd_delay_timer);
1176 tk->tb->dnd_delay_timer = 0;
1177 }
1178 return;
1179 }
1180
1181 /* Handler for "enter" event from taskbar button. This indicates that the cursor position has entered the button. */
1182 static void taskbar_button_enter(GtkWidget * widget, Task * tk)
1183 {
1184 tk->entered_state = TRUE;
1185 if (tk->tb->flat_button)
1186 gtk_widget_set_state(widget, GTK_STATE_NORMAL);
1187 task_draw_label(tk);
1188 }
1189
1190 /* Handler for "leave" event from taskbar button. This indicates that the cursor position has left the button. */
1191 static void taskbar_button_leave(GtkWidget * widget, Task * tk)
1192 {
1193 tk->entered_state = FALSE;
1194 task_draw_label(tk);
1195 }
1196
1197 /* Handler for "scroll-event" event from taskbar button. */
1198 static gboolean taskbar_button_scroll_event(GtkWidget * widget, GdkEventScroll * event, Task * tk)
1199 {
1200 TaskbarPlugin * tb = tk->tb;
1201 TaskClass * tc = tk->res_class;
1202 if ((tb->use_mouse_wheel)
1203 && (( ! tb->grouped_tasks) || (tc == NULL) || (tc->visible_count == 1)))
1204 {
1205 if ((event->direction == GDK_SCROLL_UP) || (event->direction == GDK_SCROLL_LEFT))
1206 task_raise_window(tk, event->time);
1207 else
1208 XIconifyWindow(GDK_DISPLAY(), tk->win, DefaultScreen(GDK_DISPLAY()));
1209 }
1210 return TRUE;
1211 }
1212
1213 /* Handler for "size-allocate" event from taskbar button. */
1214 static void taskbar_button_size_allocate(GtkWidget * btn, GtkAllocation * alloc, Task * tk)
1215 {
1216 if (GTK_WIDGET_REALIZED(btn))
1217 {
1218 /* Get the coordinates of the button. */
1219 int x, y;
1220 #if GTK_CHECK_VERSION(2,22,0)
1221 gdk_window_get_origin(gtk_button_get_event_window(GTK_BUTTON(btn)), &x, &y);
1222 #else
1223 gdk_window_get_origin(GTK_BUTTON(btn)->event_window, &x, &y);
1224 #endif
1225
1226
1227 /* Send a NET_WM_ICON_GEOMETRY property change on the window. */
1228 guint32 data[4];
1229 data[0] = x;
1230 data[1] = y;
1231 data[2] = alloc->width;
1232 data[3] = alloc->height;
1233 XChangeProperty(GDK_DISPLAY(), tk->win,
1234 gdk_x11_get_xatom_by_name("_NET_WM_ICON_GEOMETRY"),
1235 XA_CARDINAL, 32, PropModeReplace, (guchar *) &data, 4);
1236 }
1237 }
1238
1239 /* Update style on the taskbar when created or after a configuration change. */
1240 static void taskbar_update_style(TaskbarPlugin * tb)
1241 {
1242 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
1243 icon_grid_set_geometry(tb->icon_grid, bo,
1244 ((tb->icons_only) ? tb->icon_size + ICON_ONLY_EXTRA : tb->task_width_max), tb->icon_size + BUTTON_HEIGHT_EXTRA,
1245 tb->spacing, 0, tb->plug->panel->height);
1246 }
1247
1248 /* Update style on a task button when created or after a configuration change. */
1249 static void task_update_style(Task * tk, TaskbarPlugin * tb)
1250 {
1251 if (tb->icons_only)
1252 gtk_widget_hide(tk->label);
1253 else
1254 gtk_widget_show(tk->label);
1255
1256 if( tb->flat_button )
1257 {
1258 gtk_toggle_button_set_active((GtkToggleButton*)tk->button, FALSE);
1259 gtk_button_set_relief(GTK_BUTTON(tk->button), GTK_RELIEF_NONE);
1260 }
1261 else
1262 {
1263 gtk_toggle_button_set_active((GtkToggleButton*)tk->button, tk->focused);
1264 gtk_button_set_relief(GTK_BUTTON(tk->button), GTK_RELIEF_NORMAL);
1265 }
1266
1267 task_draw_label(tk);
1268 }
1269
1270 /* Build graphic elements needed for a task button. */
1271 static void task_build_gui(TaskbarPlugin * tb, Task * tk)
1272 {
1273 /* NOTE
1274 * 1. the extended mask is sum of taskbar and pager needs
1275 * see bug [ 940441 ] pager loose track of windows
1276 *
1277 * Do not change event mask to gtk windows spawned by this gtk client
1278 * this breaks gtk internals */
1279 if ( ! FBPANEL_WIN(tk->win))
1280 XSelectInput(GDK_DISPLAY(), tk->win, PropertyChangeMask | StructureNotifyMask);
1281
1282 /* Allocate a toggle button as the top level widget. */
1283 tk->button = gtk_toggle_button_new();
1284 gtk_container_set_border_width(GTK_CONTAINER(tk->button), 0);
1285 gtk_drag_dest_set(tk->button, 0, NULL, 0, 0);
1286
1287 /* Connect signals to the button. */
1288 g_signal_connect(tk->button, "button_press_event", G_CALLBACK(taskbar_button_press_event), (gpointer) tk);
1289 g_signal_connect(G_OBJECT(tk->button), "drag-motion", G_CALLBACK(taskbar_button_drag_motion), (gpointer) tk);
1290 g_signal_connect(G_OBJECT(tk->button), "drag-leave", G_CALLBACK(taskbar_button_drag_leave), (gpointer) tk);
1291 g_signal_connect_after(G_OBJECT (tk->button), "enter", G_CALLBACK(taskbar_button_enter), (gpointer) tk);
1292 g_signal_connect_after(G_OBJECT (tk->button), "leave", G_CALLBACK(taskbar_button_leave), (gpointer) tk);
1293 g_signal_connect_after(G_OBJECT(tk->button), "scroll-event", G_CALLBACK(taskbar_button_scroll_event), (gpointer) tk);
1294 g_signal_connect(tk->button, "size-allocate", G_CALLBACK(taskbar_button_size_allocate), (gpointer) tk);
1295
1296 /* Create a box to contain the application icon and window title. */
1297 GtkWidget * container = gtk_hbox_new(FALSE, 1);
1298 gtk_container_set_border_width(GTK_CONTAINER(container), 0);
1299
1300 /* Create an image to contain the application icon and add it to the box. */
1301 GdkPixbuf* pixbuf = task_update_icon(tb, tk, None);
1302 tk->image = gtk_image_new_from_pixbuf(pixbuf);
1303 gtk_misc_set_padding(GTK_MISC(tk->image), 0, 0);
1304 g_object_unref(pixbuf);
1305 gtk_widget_show(tk->image);
1306 gtk_box_pack_start(GTK_BOX(container), tk->image, FALSE, FALSE, 0);
1307
1308 /* Create a label to contain the window title and add it to the box. */
1309 tk->label = gtk_label_new(NULL);
1310 gtk_misc_set_alignment(GTK_MISC(tk->label), 0.0, 0.5);
1311 gtk_label_set_ellipsize(GTK_LABEL(tk->label), PANGO_ELLIPSIZE_END);
1312 gtk_box_pack_start(GTK_BOX(container), tk->label, TRUE, TRUE, 0);
1313
1314 /* Add the box to the button. */
1315 gtk_widget_show(container);
1316 gtk_container_add(GTK_CONTAINER(tk->button), container);
1317 gtk_container_set_border_width(GTK_CONTAINER(tk->button), 0);
1318
1319 /* Add the button to the taskbar. */
1320 icon_grid_add(tb->icon_grid, tk->button, TRUE);
1321 #if GTK_CHECK_VERSION(2,18,0)
1322 gtk_widget_set_can_focus(GTK_WIDGET(tk->button),FALSE);
1323 gtk_widget_set_can_default(GTK_WIDGET(tk->button),FALSE);
1324 #else
1325 GTK_WIDGET_UNSET_FLAGS(tk->button, GTK_CAN_FOCUS);
1326 GTK_WIDGET_UNSET_FLAGS(tk->button, GTK_CAN_DEFAULT);
1327 #endif
1328
1329 /* Update styles on the button. */
1330 task_update_style(tk, tb);
1331
1332 /* Flash button for window with urgency hint. */
1333 if (tk->urgency)
1334 task_set_urgency(tk);
1335 }
1336
1337 /*****************************************************
1338 * handlers for NET actions *
1339 *****************************************************/
1340
1341 /* Handler for "client-list" event from root window listener. */
1342 static void taskbar_net_client_list(GtkWidget * widget, TaskbarPlugin * tb)
1343 {
1344 /* Get the NET_CLIENT_LIST property. */
1345 int client_count;
1346 Window * client_list = get_xaproperty(GDK_ROOT_WINDOW(), a_NET_CLIENT_LIST, XA_WINDOW, &client_count);
1347 if (client_list != NULL)
1348 {
1349 /* Loop over client list, correlating it with task list. */
1350 int i;
1351 for (i = 0; i < client_count; i++)
1352 {
1353 /* Search for the window in the task list. Set up context to do an insert right away if needed. */
1354 Task * tk_pred = NULL;
1355 Task * tk_cursor;
1356 Task * tk = NULL;
1357 for (tk_cursor = tb->task_list; tk_cursor != NULL; tk_pred = tk_cursor, tk_cursor = tk_cursor->task_flink)
1358 {
1359 if (tk_cursor->win == client_list[i])
1360 {
1361 tk = tk_cursor;
1362 break;
1363 }
1364 if (tk_cursor->win > client_list[i])
1365 break;
1366 }
1367
1368 /* Task is already in task list. */
1369 if (tk != NULL)
1370 tk->present_in_client_list = TRUE;
1371
1372 /* Task is not in task list. */
1373 else
1374 {
1375 /* Evaluate window state and window type to see if it should be in task list. */
1376 NetWMWindowType nwwt;
1377 NetWMState nws;
1378 get_net_wm_state(client_list[i], &nws);
1379 get_net_wm_window_type(client_list[i], &nwwt);
1380 if ((accept_net_wm_state(&nws))
1381 && (accept_net_wm_window_type(&nwwt)))
1382 {
1383 /* Allocate and initialize new task structure. */
1384 tk = g_new0(Task, 1);
1385 tk->present_in_client_list = TRUE;
1386 tk->win = client_list[i];
1387 tk->tb = tb;
1388 tk->name_source = None;
1389 tk->image_source = None;
1390 tk->iconified = (get_wm_state(tk->win) == IconicState);
1391 tk->desktop = get_net_wm_desktop(tk->win);
1392 if (tb->use_urgency_hint)
1393 tk->urgency = task_has_urgency(tk);
1394 task_build_gui(tb, tk);
1395 task_set_names(tk, None);
1396 task_set_class(tk);
1397
1398 /* Link the task structure into the task list. */
1399 if (tk_pred == NULL)
1400 {
1401 tk->task_flink = tb->task_list;
1402 tb->task_list = tk;
1403 }
1404 else
1405 {
1406 tk->task_flink = tk_pred->task_flink;
1407 tk_pred->task_flink = tk;
1408 }
1409 }
1410 }
1411 }
1412 XFree(client_list);
1413 }
1414
1415 /* Remove windows from the task list that are not present in the NET_CLIENT_LIST. */
1416 Task * tk_pred = NULL;
1417 Task * tk = tb->task_list;
1418 while (tk != NULL)
1419 {
1420 Task * tk_succ = tk->task_flink;
1421 if (tk->present_in_client_list)
1422 {
1423 tk->present_in_client_list = FALSE;
1424 tk_pred = tk;
1425 }
1426 else
1427 {
1428 if (tk_pred == NULL)
1429 tb->task_list = tk_succ;
1430 else tk_pred->task_flink = tk_succ;
1431 task_delete(tb, tk, FALSE);
1432 }
1433 tk = tk_succ;
1434 }
1435
1436 /* Redraw the taskbar. */
1437 taskbar_redraw(tb);
1438 }
1439
1440 /* Handler for "current-desktop" event from root window listener. */
1441 static void taskbar_net_current_desktop(GtkWidget * widget, TaskbarPlugin * tb)
1442 {
1443 /* Store the local copy of current desktops. Redisplay the taskbar. */
1444 tb->current_desktop = get_net_current_desktop();
1445 recompute_group_visibility_on_current_desktop(tb);
1446 taskbar_redraw(tb);
1447 }
1448
1449 /* Handler for "number-of-desktops" event from root window listener. */
1450 static void taskbar_net_number_of_desktops(GtkWidget * widget, TaskbarPlugin * tb)
1451 {
1452 /* Store the local copy of number of desktops. Recompute the popup menu and redisplay the taskbar. */
1453 tb->number_of_desktops = get_net_number_of_desktops();
1454 taskbar_make_menu(tb);
1455 taskbar_redraw(tb);
1456 }
1457
1458 /* Handler for "active-window" event from root window listener. */
1459 static void taskbar_net_active_window(GtkWidget * widget, TaskbarPlugin * tb)
1460 {
1461 gboolean drop_old = FALSE;
1462 gboolean make_new = FALSE;
1463 Task * ctk = tb->focused;
1464 Task * ntk = NULL;
1465
1466 /* Get the window that has focus. */
1467 Window * f = get_xaproperty(GDK_ROOT_WINDOW(), a_NET_ACTIVE_WINDOW, XA_WINDOW, 0);
1468 if (f == NULL)
1469 {
1470 /* No window has focus. */
1471 drop_old = TRUE;
1472 tb->focused_previous = NULL;
1473 }
1474 else
1475 {
1476 if (*f == tb->plug->panel->topxwin)
1477 {
1478 /* Taskbar window gained focus (this isn't supposed to be able to happen). Remember current focus. */
1479 if (ctk != NULL)
1480 {
1481 tb->focused_previous = ctk;
1482 drop_old = TRUE;
1483 }
1484 }
1485 else
1486 {
1487 /* Identify task that gained focus. */
1488 tb->focused_previous = NULL;
1489 ntk = task_lookup(tb, *f);
1490 if (ntk != ctk)
1491 {
1492 drop_old = TRUE;
1493 make_new = TRUE;
1494 }
1495 }
1496 XFree(f);
1497 }
1498
1499 /* If our idea of the current task lost focus, update data structures. */
1500 if ((ctk != NULL) && (drop_old))
1501 {
1502 ctk->focused = FALSE;
1503 tb->focused = NULL;
1504 if(!tb->flat_button) /* relieve the button if flat buttons is not used. */
1505 gtk_toggle_button_set_active((GtkToggleButton*)ctk->button, FALSE);
1506
1507 task_button_redraw(ctk, tb);
1508 }
1509
1510 /* If a task gained focus, update data structures. */
1511 if ((ntk != NULL) && (make_new))
1512 {
1513 if(!tb->flat_button) /* depress the button if flat buttons is not used. */
1514 gtk_toggle_button_set_active((GtkToggleButton*)ntk->button, TRUE);
1515 ntk->focused = TRUE;
1516 tb->focused = ntk;
1517 task_button_redraw(ntk, tb);
1518 }
1519 }
1520
1521 /* Determine if the "urgency" hint is set on a window. */
1522 static gboolean task_has_urgency(Task * tk)
1523 {
1524 gboolean result = FALSE;
1525 XWMHints * hints = (XWMHints *) get_xaproperty(tk->win, XA_WM_HINTS, XA_WM_HINTS, 0);
1526 if (hints != NULL)
1527 {
1528 if (hints->flags & XUrgencyHint)
1529 result = TRUE;
1530 XFree(hints);
1531 }
1532 return result;
1533 }
1534
1535 /* Handle PropertyNotify event.
1536 * http://tronche.com/gui/x/icccm/
1537 * http://standards.freedesktop.org/wm-spec/wm-spec-1.4.html */
1538 static void taskbar_property_notify_event(TaskbarPlugin *tb, XEvent *ev)
1539 {
1540 /* State may be PropertyNewValue, PropertyDeleted. */
1541 if (((XPropertyEvent*) ev)->state == PropertyNewValue)
1542 {
1543 Atom at = ev->xproperty.atom;
1544 Window win = ev->xproperty.window;
1545 if (win != GDK_ROOT_WINDOW())
1546 {
1547 /* Look up task structure by X window handle. */
1548 Task * tk = task_lookup(tb, win);
1549 if (tk != NULL)
1550 {
1551 /* Install an error handler that ignores BadWindow.
1552 * We frequently get a PropertyNotify event on deleted windows. */
1553 XErrorHandler previous_error_handler = XSetErrorHandler(panel_handle_x_error_swallow_BadWindow_BadDrawable);
1554
1555 /* Dispatch on atom. */
1556 if (at == a_NET_WM_DESKTOP)
1557 {
1558 /* Window changed desktop. */
1559 tk->desktop = get_net_wm_desktop(win);
1560 taskbar_redraw(tb);
1561 }
1562 else if ((at == XA_WM_NAME) || (at == a_NET_WM_NAME) || (at == a_NET_WM_VISIBLE_NAME))
1563 {
1564 /* Window changed name. */
1565 task_set_names(tk, at);
1566 if (tk->res_class != NULL)
1567 {
1568 /* A change to the window name may change the visible name of the class. */
1569 recompute_group_visibility_for_class(tb, tk->res_class);
1570 if (tk->res_class->visible_task != NULL)
1571 task_draw_label(tk->res_class->visible_task);
1572 }
1573 }
1574 else if (at == XA_WM_CLASS)
1575 {
1576 /* Window changed class. */
1577 task_set_class(tk);
1578 taskbar_redraw(tb);
1579 }
1580 else if (at == a_WM_STATE)
1581 {
1582 /* Window changed state. */
1583 tk->iconified = (get_wm_state(win) == IconicState);
1584 task_draw_label(tk);
1585 }
1586 else if (at == XA_WM_HINTS)
1587 {
1588 /* Window changed "window manager hints".
1589 * Some windows set their WM_HINTS icon after mapping. */
1590 GdkPixbuf * pixbuf = task_update_icon(tb, tk, XA_WM_HINTS);
1591 if (pixbuf != NULL)
1592 {
1593 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
1594 g_object_unref(pixbuf);
1595 }
1596
1597 if (tb->use_urgency_hint)
1598 {
1599 tk->urgency = task_has_urgency(tk);
1600 if (tk->urgency)
1601 task_set_urgency(tk);
1602 else
1603 task_clear_urgency(tk);
1604 }
1605 }
1606 else if (at == a_NET_WM_STATE)
1607 {
1608 /* Window changed EWMH state. */
1609 NetWMState nws;
1610 get_net_wm_state(tk->win, &nws);
1611 if ( ! accept_net_wm_state(&nws))
1612 {
1613 task_delete(tb, tk, TRUE);
1614 taskbar_redraw(tb);
1615 }
1616 }
1617 else if (at == a_NET_WM_ICON)
1618 {
1619 /* Window changed EWMH icon. */
1620 GdkPixbuf * pixbuf = task_update_icon(tb, tk, a_NET_WM_ICON);
1621 if (pixbuf != NULL)
1622 {
1623 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
1624 g_object_unref(pixbuf);
1625 }
1626 }
1627 else if (at == a_NET_WM_WINDOW_TYPE)
1628 {
1629 /* Window changed EWMH window type. */
1630 NetWMWindowType nwwt;
1631 get_net_wm_window_type(tk->win, &nwwt);
1632 if ( ! accept_net_wm_window_type(&nwwt))
1633 {
1634 task_delete(tb, tk, TRUE);
1635 taskbar_redraw(tb);
1636 }
1637 }
1638 XSetErrorHandler(previous_error_handler);
1639 }
1640 }
1641 }
1642 }
1643
1644 /* GDK event filter. */
1645 static GdkFilterReturn taskbar_event_filter(XEvent * xev, GdkEvent * event, TaskbarPlugin * tb)
1646 {
1647 /* Look for PropertyNotify events and update state. */
1648 if (xev->type == PropertyNotify)
1649 taskbar_property_notify_event(tb, xev);
1650 return GDK_FILTER_CONTINUE;
1651 }
1652
1653 /* Handler for "activate" event on Raise item of right-click menu for task buttons. */
1654 static void menu_raise_window(GtkWidget * widget, TaskbarPlugin * tb)
1655 {
1656 if ((tb->menutask->desktop != ALL_WORKSPACES) && (tb->menutask->desktop != tb->current_desktop))
1657 Xclimsg(GDK_ROOT_WINDOW(), a_NET_CURRENT_DESKTOP, tb->menutask->desktop, 0, 0, 0, 0);
1658 XMapRaised(GDK_DISPLAY(), tb->menutask->win);
1659 task_group_menu_destroy(tb);
1660 }
1661
1662 /* Handler for "activate" event on Restore item of right-click menu for task buttons. */
1663 static void menu_restore_window(GtkWidget * widget, TaskbarPlugin * tb)
1664 {
1665 GdkWindow * win = gdk_window_foreign_new(tb->menutask->win);
1666 gdk_window_unmaximize(win);
1667 gdk_window_unref(win);
1668 task_group_menu_destroy(tb);
1669 }
1670
1671 /* Handler for "activate" event on Maximize item of right-click menu for task buttons. */
1672 static void menu_maximize_window(GtkWidget * widget, TaskbarPlugin * tb)
1673 {
1674 GdkWindow * win = gdk_window_foreign_new(tb->menutask->win);
1675 gdk_window_maximize(win);
1676 gdk_window_unref(win);
1677 task_group_menu_destroy(tb);
1678 }
1679
1680 /* Handler for "activate" event on Iconify item of right-click menu for task buttons. */
1681 static void menu_iconify_window(GtkWidget * widget, TaskbarPlugin * tb)
1682 {
1683 XIconifyWindow(GDK_DISPLAY(), tb->menutask->win, DefaultScreen(GDK_DISPLAY()));
1684 task_group_menu_destroy(tb);
1685 }
1686
1687 /* Handler for "activate" event on Move to Workspace item of right-click menu for task buttons. */
1688 static void menu_move_to_workspace(GtkWidget * widget, TaskbarPlugin * tb)
1689 {
1690 int num = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "num"));
1691 Xclimsg(tb->menutask->win, a_NET_WM_DESKTOP, num, 0, 0, 0, 0);
1692 task_group_menu_destroy(tb);
1693 }
1694
1695 /* Handler for "activate" event on Close item of right-click menu for task buttons. */
1696 static void menu_close_window(GtkWidget * widget, TaskbarPlugin * tb)
1697 {
1698 Xclimsgwm(tb->menutask->win, a_WM_PROTOCOLS, a_WM_DELETE_WINDOW);
1699 task_group_menu_destroy(tb);
1700 }
1701
1702 /* Make right-click menu for task buttons.
1703 * This depends on number of desktops and edge. */
1704 static void taskbar_make_menu(TaskbarPlugin * tb)
1705 {
1706 /* Deallocate old menu if present. */
1707 if (tb->menu != NULL)
1708 gtk_widget_destroy(tb->menu);
1709
1710 /* Allocate menu. */
1711 GtkWidget * menu = gtk_menu_new();
1712
1713 /* Add Raise menu item. */
1714 GtkWidget *mi = gtk_menu_item_new_with_mnemonic(_("_Raise"));
1715 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1716 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_raise_window, tb);
1717
1718 /* Add Restore menu item. */
1719 mi = gtk_menu_item_new_with_mnemonic(_("R_estore"));
1720 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1721 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_restore_window, tb);
1722
1723 /* Add Maximize menu item. */
1724 mi = gtk_menu_item_new_with_mnemonic(_("Ma_ximize"));
1725 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1726 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_maximize_window, tb);
1727
1728 /* Add Iconify menu item. */
1729 mi = gtk_menu_item_new_with_mnemonic(_("Ico_nify"));
1730 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1731 g_signal_connect(G_OBJECT(mi), "activate", (GCallback) menu_iconify_window, tb);
1732
1733 /* If multiple desktops are supported, add menu items to select them. */
1734 if (tb->number_of_desktops > 1)
1735 {
1736 char label[128];
1737
1738 /* Allocate submenu. */
1739 GtkWidget * workspace_menu = gtk_menu_new();
1740
1741 /* Loop over all desktops. */
1742 int i;
1743 for (i = 1; i <= tb->number_of_desktops; i++)
1744 {
1745 /* For the first 9 desktops, allow the desktop number as a keyboard shortcut. */
1746 if (i <= 9)
1747 {
1748 g_snprintf(label, sizeof(label), _("Workspace _%d"), i);
1749 mi = gtk_menu_item_new_with_mnemonic(label);
1750 }
1751 else
1752 {
1753 g_snprintf(label, sizeof(label), _("Workspace %d"), i);
1754 mi = gtk_menu_item_new_with_label(label);
1755 }
1756
1757 /* Set the desktop number as a property on the menu item. */
1758 g_object_set_data(G_OBJECT(mi), "num", GINT_TO_POINTER(i - 1));
1759 g_signal_connect(mi, "activate", G_CALLBACK(menu_move_to_workspace), tb);
1760 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), mi);
1761 }
1762
1763 /* Add a separator. */
1764 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), gtk_separator_menu_item_new());
1765
1766 /* Add "move to all workspaces" item. This causes the window to be visible no matter what desktop is active. */
1767 mi = gtk_menu_item_new_with_mnemonic(_("_All workspaces"));
1768 g_object_set_data(G_OBJECT(mi), "num", GINT_TO_POINTER(ALL_WORKSPACES));
1769 g_signal_connect(mi, "activate", G_CALLBACK(menu_move_to_workspace), tb);
1770 gtk_menu_shell_append(GTK_MENU_SHELL(workspace_menu), mi);
1771
1772 /* Add Move to Workspace menu item as a submenu. */
1773 mi = gtk_menu_item_new_with_mnemonic(_("_Move to Workspace"));
1774 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1775 gtk_menu_item_set_submenu(GTK_MENU_ITEM(mi), workspace_menu);
1776 }
1777
1778 /* Add Close menu item. By popular demand, we place this menu item closest to the cursor. */
1779 mi = gtk_menu_item_new_with_mnemonic (_("_Close Window"));
1780 if (tb->plug->panel->edge != EDGE_BOTTOM)
1781 {
1782 gtk_menu_shell_prepend(GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
1783 gtk_menu_shell_prepend(GTK_MENU_SHELL(menu), mi);
1784 }
1785 else
1786 {
1787 gtk_menu_shell_append(GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
1788 gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
1789 }
1790 g_signal_connect(G_OBJECT(mi), "activate", (GCallback)menu_close_window, tb);
1791
1792 gtk_widget_show_all(menu);
1793 tb->menu = menu;
1794 }
1795
1796 /* Handler for "window-manager-changed" event. */
1797 static void taskbar_window_manager_changed(GdkScreen * screen, TaskbarPlugin * tb)
1798 {
1799 /* Force re-evaluation of use_net_active. */
1800 tb->net_active_checked = FALSE;
1801 }
1802
1803 /* Build graphic elements needed for the taskbar. */
1804 static void taskbar_build_gui(Plugin * p)
1805 {
1806 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1807
1808 /* Set up style for taskbar. */
1809 gtk_rc_parse_string(taskbar_rc);
1810
1811 /* Allocate top level widget and set into Plugin widget pointer. */
1812 p->pwid = gtk_event_box_new();
1813 gtk_container_set_border_width(GTK_CONTAINER(p->pwid), 0);
1814 #if GTK_CHECK_VERSION(2,18,0)
1815 gtk_widget_set_has_window(GTK_WIDGET(p->pwid),FALSE);
1816 #else
1817 GTK_WIDGET_SET_FLAGS(p->pwid, GTK_NO_WINDOW);
1818 #endif
1819 gtk_widget_set_name(p->pwid, "taskbar");
1820
1821 /* Make container for task buttons as a child of top level widget. */
1822 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
1823 tb->icon_grid = icon_grid_new(p->panel, p->pwid, bo, tb->task_width_max, tb->icon_size, tb->spacing, 0, p->panel->height);
1824 icon_grid_set_constrain_width(tb->icon_grid, TRUE);
1825 taskbar_update_style(tb);
1826
1827 /* Add GDK event filter. */
1828 gdk_window_add_filter(NULL, (GdkFilterFunc) taskbar_event_filter, tb);
1829
1830 /* Connect signal to receive mouse events on the unused portion of the taskbar. */
1831 g_signal_connect(p->pwid, "button-press-event", G_CALLBACK(plugin_button_press_event), p);
1832
1833 /* Connect signals to receive root window events and initialize root window properties. */
1834 tb->number_of_desktops = get_net_number_of_desktops();
1835 tb->current_desktop = get_net_current_desktop();
1836 g_signal_connect(G_OBJECT(fbev), "current_desktop", G_CALLBACK(taskbar_net_current_desktop), (gpointer) tb);
1837 g_signal_connect(G_OBJECT(fbev), "active_window", G_CALLBACK(taskbar_net_active_window), (gpointer) tb);
1838 g_signal_connect(G_OBJECT(fbev), "number_of_desktops", G_CALLBACK(taskbar_net_number_of_desktops), (gpointer) tb);
1839 g_signal_connect(G_OBJECT(fbev), "client_list", G_CALLBACK(taskbar_net_client_list), (gpointer) tb);
1840
1841 /* Make right-click menu for task buttons.
1842 * It is retained for the life of the taskbar and will be shown as needed.
1843 * Number of desktops and edge is needed for this operation. */
1844 taskbar_make_menu(tb);
1845
1846 /* Connect a signal to be notified when the window manager changes. This causes re-evaluation of the "use_net_active" status. */
1847 g_signal_connect(gtk_widget_get_screen(p->pwid), "window-manager-changed", G_CALLBACK(taskbar_window_manager_changed), tb);
1848 }
1849
1850 /* Plugin constructor. */
1851 static int taskbar_constructor(Plugin * p, char ** fp)
1852 {
1853 /* Allocate plugin context and set into Plugin private data pointer. */
1854 TaskbarPlugin * tb = g_new0(TaskbarPlugin, 1);
1855 tb->plug = p;
1856 p->priv = tb;
1857
1858 /* Initialize to defaults. */
1859 tb->icon_size = p->panel->icon_size;
1860 tb->tooltips = TRUE;
1861 tb->icons_only = FALSE;
1862 tb->show_all_desks = FALSE;
1863 tb->task_width_max = TASK_WIDTH_MAX;
1864 tb->spacing = 1;
1865 tb->use_mouse_wheel = TRUE;
1866 tb->use_urgency_hint = TRUE;
1867 tb->grouped_tasks = FALSE;
1868
1869 /* Process configuration file. */
1870 line s;
1871 s.len = 256;
1872 if( fp )
1873 {
1874 while (lxpanel_get_line(fp, &s) != LINE_BLOCK_END) {
1875 if (s.type == LINE_NONE) {
1876 ERR( "taskbar: illegal token %s\n", s.str);
1877 return 0;
1878 }
1879 if (s.type == LINE_VAR)
1880 {
1881 if (g_ascii_strcasecmp(s.t[0], "tooltips") == 0)
1882 tb->tooltips = str2num(bool_pair, s.t[1], 1);
1883 else if (g_ascii_strcasecmp(s.t[0], "IconsOnly") == 0)
1884 tb->icons_only = str2num(bool_pair, s.t[1], 0);
1885 else if (g_ascii_strcasecmp(s.t[0], "AcceptSkipPager") == 0) /* For backward compatibility */
1886 ;
1887 else if (g_ascii_strcasecmp(s.t[0], "ShowIconified") == 0) /* For backward compatibility */
1888 ;
1889 else if (g_ascii_strcasecmp(s.t[0], "ShowMapped") == 0) /* For backward compatibility */
1890 ;
1891 else if (g_ascii_strcasecmp(s.t[0], "ShowAllDesks") == 0)
1892 tb->show_all_desks = str2num(bool_pair, s.t[1], 0);
1893 else if (g_ascii_strcasecmp(s.t[0], "MaxTaskWidth") == 0)
1894 tb->task_width_max = atoi(s.t[1]);
1895 else if (g_ascii_strcasecmp(s.t[0], "spacing") == 0)
1896 tb->spacing = atoi(s.t[1]);
1897 else if (g_ascii_strcasecmp(s.t[0], "UseMouseWheel") == 0)
1898 tb->use_mouse_wheel = str2num(bool_pair, s.t[1], 1);
1899 else if (g_ascii_strcasecmp(s.t[0], "UseUrgencyHint") == 0)
1900 tb->use_urgency_hint = str2num(bool_pair, s.t[1], 1);
1901 else if (g_ascii_strcasecmp(s.t[0], "FlatButton") == 0)
1902 tb->flat_button = str2num(bool_pair, s.t[1], 1);
1903 else if (g_ascii_strcasecmp(s.t[0], "GroupedTasks") == 0)
1904 tb->grouped_tasks = str2num(bool_pair, s.t[1], 1);
1905 else
1906 ERR( "taskbar: unknown var %s\n", s.t[0]);
1907 }
1908 else
1909 {
1910 ERR( "taskbar: illegal in this context %s\n", s.str);
1911 return 0;
1912 }
1913 }
1914 }
1915
1916 /* Build the graphic elements. */
1917 taskbar_build_gui(p);
1918
1919 /* Fetch the client list and redraw the taskbar. Then determine what window has focus. */
1920 taskbar_net_client_list(NULL, tb);
1921 taskbar_net_active_window(NULL, tb);
1922 return 1;
1923 }
1924
1925 /* Plugin destructor. */
1926 static void taskbar_destructor(Plugin * p)
1927 {
1928 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1929
1930 /* Remove GDK event filter. */
1931 gdk_window_remove_filter(NULL, (GdkFilterFunc) taskbar_event_filter, tb);
1932
1933 /* Remove root window signal handlers. */
1934 g_signal_handlers_disconnect_by_func(fbev, taskbar_net_current_desktop, tb);
1935 g_signal_handlers_disconnect_by_func(fbev, taskbar_net_active_window, tb);
1936 g_signal_handlers_disconnect_by_func(fbev, taskbar_net_number_of_desktops, tb);
1937 g_signal_handlers_disconnect_by_func(fbev, taskbar_net_client_list, tb);
1938
1939 /* Remove "window-manager-changed" handler. */
1940 g_signal_handlers_disconnect_by_func(gtk_widget_get_screen(p->pwid), taskbar_window_manager_changed, tb);
1941
1942 /* Deallocate task list. */
1943 while (tb->task_list != NULL)
1944 task_delete(tb, tb->task_list, TRUE);
1945
1946 /* Deallocate class list. */
1947 while (tb->res_class_list != NULL)
1948 {
1949 TaskClass * tc = tb->res_class_list;
1950 tb->res_class_list = tc->res_class_flink;
1951 g_free(tc->res_class);
1952 g_free(tc);
1953 }
1954
1955 /* Deallocate other memory. */
1956 gtk_widget_destroy(tb->menu);
1957 g_free(tb);
1958 }
1959
1960 /* Callback from configuration dialog mechanism to apply the configuration. */
1961 static void taskbar_apply_configuration(Plugin * p)
1962 {
1963 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1964
1965 /* Update style on taskbar. */
1966 taskbar_update_style(tb);
1967
1968 /* Update styles on each button. */
1969 Task * tk;
1970 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
1971 task_update_style(tk, tb);
1972
1973 /* Refetch the client list and redraw. */
1974 recompute_group_visibility_on_current_desktop(tb);
1975 taskbar_net_client_list(NULL, tb);
1976 }
1977
1978 /* Display the configuration dialog. */
1979 static void taskbar_configure(Plugin * p, GtkWindow * parent)
1980 {
1981 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
1982 GtkWidget* dlg = create_generic_config_dlg(
1983 _(p->class->name),
1984 GTK_WIDGET(parent),
1985 (GSourceFunc) taskbar_apply_configuration, (gpointer) p,
1986 _("Show tooltips"), &tb->tooltips, CONF_TYPE_BOOL,
1987 _("Icons only"), &tb->icons_only, CONF_TYPE_BOOL,
1988 _("Flat buttons"), &tb->flat_button, CONF_TYPE_BOOL,
1989 _("Show windows from all desktops"), &tb->show_all_desks, CONF_TYPE_BOOL,
1990 _("Use mouse wheel"), &tb->use_mouse_wheel, CONF_TYPE_BOOL,
1991 _("Flash when there is any window requiring attention"), &tb->use_urgency_hint, CONF_TYPE_BOOL,
1992 _("Combine multiple application windows into a single button"), &tb->grouped_tasks, CONF_TYPE_BOOL,
1993 _("Maximum width of task button"), &tb->task_width_max, CONF_TYPE_INT,
1994 _("Spacing"), &tb->spacing, CONF_TYPE_INT,
1995 NULL);
1996 gtk_window_present(GTK_WINDOW(dlg));
1997 }
1998
1999 /* Save the configuration to the configuration file. */
2000 static void taskbar_save_configuration(Plugin * p, FILE * fp)
2001 {
2002 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
2003 lxpanel_put_bool(fp, "tooltips", tb->tooltips);
2004 lxpanel_put_bool(fp, "IconsOnly", tb->icons_only);
2005 lxpanel_put_bool(fp, "ShowAllDesks", tb->show_all_desks);
2006 lxpanel_put_bool(fp, "UseMouseWheel", tb->use_mouse_wheel);
2007 lxpanel_put_bool(fp, "UseUrgencyHint", tb->use_urgency_hint);
2008 lxpanel_put_bool(fp, "FlatButton", tb->flat_button);
2009 lxpanel_put_int(fp, "MaxTaskWidth", tb->task_width_max);
2010 lxpanel_put_int(fp, "spacing", tb->spacing);
2011 lxpanel_put_bool(fp, "GroupedTasks", tb->grouped_tasks);
2012 }
2013
2014 /* Callback when panel configuration changes. */
2015 static void taskbar_panel_configuration_changed(Plugin * p)
2016 {
2017 TaskbarPlugin * tb = (TaskbarPlugin *) p->priv;
2018 taskbar_update_style(tb);
2019 taskbar_make_menu(tb);
2020 GtkOrientation bo = (tb->plug->panel->orientation == ORIENT_HORIZ) ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;
2021 icon_grid_set_geometry(tb->icon_grid, bo,
2022 ((tb->icons_only) ? tb->plug->panel->icon_size + ICON_ONLY_EXTRA : tb->task_width_max), tb->plug->panel->icon_size + BUTTON_HEIGHT_EXTRA,
2023 tb->spacing, 0, tb->plug->panel->height);
2024
2025 /* If the icon size changed, refetch all the icons. */
2026 if (tb->plug->panel->icon_size != tb->icon_size)
2027 {
2028 tb->icon_size = tb->plug->panel->icon_size;
2029 Task * tk;
2030 for (tk = tb->task_list; tk != NULL; tk = tk->task_flink)
2031 {
2032 GdkPixbuf * pixbuf = task_update_icon(tb, tk, None);
2033 if (pixbuf != NULL)
2034 {
2035 gtk_image_set_from_pixbuf(GTK_IMAGE(tk->image), pixbuf);
2036 g_object_unref(pixbuf);
2037 }
2038 }
2039 }
2040
2041 /* Redraw all the labels. Icon size or font color may have changed. */
2042 taskbar_redraw(tb);
2043 }
2044
2045 /* Plugin descriptor. */
2046 PluginClass taskbar_plugin_class = {
2047
2048 PLUGINCLASS_VERSIONING,
2049
2050 type : "taskbar",
2051 name : N_("Task Bar (Window List)"),
2052 version: "1.0",
2053 description : N_("Taskbar shows all opened windows and allow to iconify them, shade or get focus"),
2054
2055 /* Stretch is available and default for this plugin. */
2056 expand_available : TRUE,
2057 expand_default : TRUE,
2058
2059 constructor : taskbar_constructor,
2060 destructor : taskbar_destructor,
2061 config : taskbar_configure,
2062 save : taskbar_save_configuration,
2063 panel_configuration_changed : taskbar_panel_configuration_changed
2064
2065 };