Check the return value for launching the startup command.
[dana/openbox.git] / openbox / focus_cycle.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    focus_cycle.c for the Openbox window manager
4    Copyright (c) 2006        Mikael Magnusson
5    Copyright (c) 2003-2007   Dana Jansens
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #include "focus_cycle.h"
21 #include "focus_cycle_indicator.h"
22 #include "client.h"
23 #include "frame.h"
24 #include "focus.h"
25 #include "screen.h"
26 #include "openbox.h"
27 #include "debug.h"
28
29 #include <X11/Xlib.h>
30 #include <glib.h>
31
32 typedef enum {
33     OB_CYCLE_NONE = 0,
34     OB_CYCLE_NORMAL,
35     OB_CYCLE_DIRECTIONAL
36 } ObCycleType;
37
38 ObClient       *focus_cycle_target = NULL;
39 static ObCycleType focus_cycle_type = OB_CYCLE_NONE;
40 static gboolean focus_cycle_linear;
41 static gboolean focus_cycle_iconic_windows;
42 static gboolean focus_cycle_all_desktops;
43 static gboolean focus_cycle_nonhilite_windows;
44 static gboolean focus_cycle_dock_windows;
45 static gboolean focus_cycle_desktop_windows;
46
47 static ObClient *focus_find_directional(ObClient *c,
48                                         ObDirection dir,
49                                         gboolean dock_windows,
50                                         gboolean desktop_windows);
51
52 void focus_cycle_startup(gboolean reconfig)
53 {
54     if (reconfig) return;
55 }
56
57 void focus_cycle_shutdown(gboolean reconfig)
58 {
59     if (reconfig) return;
60 }
61
62 void focus_cycle_addremove(ObClient *c, gboolean redraw)
63 {
64     if (!focus_cycle_type)
65         return;
66
67     if (focus_cycle_type == OB_CYCLE_DIRECTIONAL) {
68         if (c && focus_cycle_target == c) {
69             focus_directional_cycle(0, TRUE, TRUE, TRUE, TRUE,
70                                     TRUE, TRUE, TRUE);
71         }
72     }
73     else if (c && redraw) {
74         gboolean v, s;
75
76         v = focus_cycle_valid(c);
77         s = focus_cycle_popup_is_showing(c);
78
79         if (v != s)
80             focus_cycle_reorder();
81     }
82     else if (redraw) {
83         focus_cycle_reorder();
84     }
85 }
86
87 void focus_cycle_reorder()
88 {
89     if (focus_cycle_type == OB_CYCLE_NORMAL) {
90         focus_cycle_target = focus_cycle_popup_refresh(focus_cycle_target,
91                                                        TRUE,
92                                                        focus_cycle_linear);
93         focus_cycle_update_indicator(focus_cycle_target);
94         if (!focus_cycle_target)
95             focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE,
96                         TRUE, TRUE, OB_FOCUS_CYCLE_POPUP_MODE_NONE,
97                         TRUE, TRUE);
98     }
99 }
100
101 ObClient* focus_cycle(gboolean forward, gboolean all_desktops,
102                       gboolean nonhilite_windows,
103                       gboolean dock_windows, gboolean desktop_windows,
104                       gboolean linear, gboolean interactive,
105                       gboolean showbar, ObFocusCyclePopupMode mode,
106                       gboolean done, gboolean cancel)
107 {
108     static GList *order = NULL;
109     GList *it, *start, *list;
110     ObClient *ft = NULL;
111     ObClient *ret = NULL;
112
113     if (interactive) {
114         if (cancel) {
115             focus_cycle_target = NULL;
116             goto done_cycle;
117         } else if (done)
118             goto done_cycle;
119
120         if (!focus_order)
121             goto done_cycle;
122
123         if (linear) list = client_list;
124         else        list = focus_order;
125     } else {
126         if (!focus_order)
127             goto done_cycle;
128         list = client_list;
129     }
130
131     if (focus_cycle_target == NULL) {
132         focus_cycle_linear = linear;
133         focus_cycle_iconic_windows = TRUE;
134         focus_cycle_all_desktops = all_desktops;
135         focus_cycle_nonhilite_windows = nonhilite_windows;
136         focus_cycle_dock_windows = dock_windows;
137         focus_cycle_desktop_windows = desktop_windows;
138         start = it = g_list_find(list, focus_client);
139     } else
140         start = it = g_list_find(list, focus_cycle_target);
141
142     if (!start) /* switched desktops or something? */
143         start = it = forward ? g_list_last(list) : g_list_first(list);
144     if (!start) goto done_cycle;
145
146     do {
147         if (forward) {
148             it = it->next;
149             if (it == NULL) it = g_list_first(list);
150         } else {
151             it = it->prev;
152             if (it == NULL) it = g_list_last(list);
153         }
154         ft = it->data;
155         if (focus_cycle_valid(ft)) {
156             if (interactive) {
157                 if (ft != focus_cycle_target) { /* prevents flicker */
158                     focus_cycle_target = ft;
159                     focus_cycle_type = OB_CYCLE_NORMAL;
160                     focus_cycle_draw_indicator(showbar ? ft : NULL);
161                 }
162                 /* same arguments as focus_target_valid */
163                 focus_cycle_popup_show(ft, mode, focus_cycle_linear);
164                 return focus_cycle_target;
165             } else if (ft != focus_cycle_target) {
166                 focus_cycle_target = ft;
167                 focus_cycle_type = OB_CYCLE_NORMAL;
168                 done = TRUE;
169                 break;
170             }
171         }
172     } while (it != start);
173
174 done_cycle:
175     if (done && !cancel) ret = focus_cycle_target;
176
177     focus_cycle_target = NULL;
178     focus_cycle_type = OB_CYCLE_NONE;
179     g_list_free(order);
180     order = NULL;
181
182     if (interactive) {
183         focus_cycle_draw_indicator(NULL);
184         focus_cycle_popup_hide();
185     }
186
187     return ret;
188 }
189
190 /* this be mostly ripped from fvwm */
191 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
192                                         gboolean dock_windows,
193                                         gboolean desktop_windows)
194 {
195     gint my_cx, my_cy, his_cx, his_cy;
196     gint offset = 0;
197     gint distance = 0;
198     gint score, best_score;
199     ObClient *best_client, *cur;
200     GList *it;
201
202     if (!client_list)
203         return NULL;
204
205     /* first, find the centre coords of the currently focused window */
206     my_cx = c->frame->area.x + c->frame->area.width / 2;
207     my_cy = c->frame->area.y + c->frame->area.height / 2;
208
209     best_score = -1;
210     best_client = c;
211
212     for (it = g_list_first(client_list); it; it = g_list_next(it)) {
213         cur = it->data;
214
215         /* the currently selected window isn't interesting */
216         if (cur == c)
217             continue;
218         if (!focus_cycle_valid(it->data))
219             continue;
220
221         /* find the centre coords of this window, from the
222          * currently focused window's point of view */
223         his_cx = (cur->frame->area.x - my_cx)
224             + cur->frame->area.width / 2;
225         his_cy = (cur->frame->area.y - my_cy)
226             + cur->frame->area.height / 2;
227
228         if (dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
229             dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST)
230         {
231             gint tx;
232             /* Rotate the diagonals 45 degrees counterclockwise.
233              * To do this, multiply the matrix /+h +h\ with the
234              * vector (x y).                   \-h +h/
235              * h = sqrt(0.5). We can set h := 1 since absolute
236              * distance doesn't matter here. */
237             tx = his_cx + his_cy;
238             his_cy = -his_cx + his_cy;
239             his_cx = tx;
240         }
241
242         switch (dir) {
243         case OB_DIRECTION_NORTH:
244         case OB_DIRECTION_SOUTH:
245         case OB_DIRECTION_NORTHEAST:
246         case OB_DIRECTION_SOUTHWEST:
247             offset = (his_cx < 0) ? -his_cx : his_cx;
248             distance = ((dir == OB_DIRECTION_NORTH ||
249                          dir == OB_DIRECTION_NORTHEAST) ?
250                         -his_cy : his_cy);
251             break;
252         case OB_DIRECTION_EAST:
253         case OB_DIRECTION_WEST:
254         case OB_DIRECTION_SOUTHEAST:
255         case OB_DIRECTION_NORTHWEST:
256             offset = (his_cy < 0) ? -his_cy : his_cy;
257             distance = ((dir == OB_DIRECTION_WEST ||
258                          dir == OB_DIRECTION_NORTHWEST) ?
259                         -his_cx : his_cx);
260             break;
261         }
262
263         /* the target must be in the requested direction */
264         if (distance <= 0)
265             continue;
266
267         /* Calculate score for this window.  The smaller the better. */
268         score = distance + offset;
269
270         /* windows more than 45 degrees off the direction are
271          * heavily penalized and will only be chosen if nothing
272          * else within a million pixels */
273         if (offset > distance)
274             score += 1000000;
275
276         if (best_score == -1 || score < best_score) {
277             best_client = cur;
278             best_score = score;
279         }
280     }
281
282     return best_client;
283 }
284
285 ObClient* focus_directional_cycle(ObDirection dir, gboolean dock_windows,
286                                   gboolean desktop_windows,
287                                   gboolean interactive,
288                                   gboolean showbar, gboolean dialog,
289                                   gboolean done, gboolean cancel)
290 {
291     static ObClient *first = NULL;
292     ObClient *ft = NULL;
293     ObClient *ret = NULL;
294
295     if (cancel) {
296         focus_cycle_target = NULL;
297         goto done_cycle;
298     } else if (done && interactive)
299         goto done_cycle;
300
301     if (!focus_order)
302         goto done_cycle;
303
304     if (focus_cycle_target == NULL) {
305         focus_cycle_linear = FALSE;
306         focus_cycle_iconic_windows = FALSE;
307         focus_cycle_all_desktops = FALSE;
308         focus_cycle_nonhilite_windows = TRUE;
309         focus_cycle_dock_windows = dock_windows;
310         focus_cycle_desktop_windows = desktop_windows;
311     }
312
313     if (!first) first = focus_client;
314
315     if (focus_cycle_target)
316         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
317                                     desktop_windows);
318     else if (first)
319         ft = focus_find_directional(first, dir, dock_windows, desktop_windows);
320     else {
321         GList *it;
322
323         for (it = focus_order; it; it = g_list_next(it))
324             if (focus_cycle_valid(it->data)) {
325                 ft = it->data;
326                 break;
327             }
328     }
329
330     if (ft && ft != focus_cycle_target) {/* prevents flicker */
331         focus_cycle_target = ft;
332         focus_cycle_type = OB_CYCLE_DIRECTIONAL;
333         if (!interactive)
334             goto done_cycle;
335         focus_cycle_draw_indicator(showbar ? ft : NULL);
336     }
337     if (focus_cycle_target && dialog)
338         /* same arguments as focus_target_valid */
339         focus_cycle_popup_single_show(focus_cycle_target);
340     return focus_cycle_target;
341
342 done_cycle:
343     if (done && !cancel) ret = focus_cycle_target;
344
345     first = NULL;
346     focus_cycle_target = NULL;
347     focus_cycle_type = OB_CYCLE_NONE;
348
349     focus_cycle_draw_indicator(NULL);
350     focus_cycle_popup_single_hide();
351
352     return ret;
353 }
354
355 gboolean focus_cycle_valid(struct _ObClient *client)
356 {
357     return focus_valid_target(client, screen_desktop, TRUE,
358                               focus_cycle_iconic_windows,
359                               focus_cycle_all_desktops,
360                               focus_cycle_nonhilite_windows,
361                               focus_cycle_dock_windows,
362                               focus_cycle_desktop_windows,
363                               FALSE);
364 }