Fix for when the menu's update function returns FALSE and no menu is shown.
[dana/openbox.git] / openbox / resist.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    resist.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 "resist.h"
21 #include "client.h"
22 #include "frame.h"
23 #include "stacking.h"
24 #include "screen.h"
25 #include "dock.h"
26 #include "config.h"
27
28 #include <glib.h>
29
30 static gboolean resist_move_window(Rect window,
31                                    Rect target, gint resist,
32                                    gint *x, gint *y)
33 {
34     gint l, t, r, b; /* requested edges */
35     gint cl, ct, cr, cb; /* current edges */
36     gint w, h; /* current size */
37     gint tl, tt, tr, tb; /* 1 past the target's edges on each side */
38     gboolean snapx = 0, snapy = 0;
39
40     w = window.width;
41     h = window.height;
42
43     l = *x;
44     t = *y;
45     r = l + w - 1;
46     b = t + h - 1;
47
48     cl = RECT_LEFT(window);
49     ct = RECT_TOP(window);
50     cr = RECT_RIGHT(window);
51     cb = RECT_BOTTOM(window);
52
53     tl = RECT_LEFT(target) - 1;
54     tt = RECT_TOP(target) - 1;
55     tr = RECT_RIGHT(target) + 1;
56     tb = RECT_BOTTOM(target) + 1;
57
58     /* snapx and snapy ensure that the window snaps to the top-most
59        window edge available, without going all the way from
60        bottom-to-top in the stacking list
61     */
62     if (!snapx) {
63         if (ct < tb && cb > tt) {
64             if (cl >= tr && l < tr && l >= tr - resist)
65                 *x = tr, snapx = TRUE;
66             else if (cr <= tl && r > tl &&
67                      r <= tl + resist)
68                 *x = tl - w + 1, snapx = TRUE;
69             if (snapx) {
70                 /* try to corner snap to the window */
71                 if (ct > tt && t <= tt &&
72                     t > tt - resist)
73                     *y = tt + 1, snapy = TRUE;
74                 else if (cb < tb && b >= tb &&
75                          b < tb + resist)
76                     *y = tb - h, snapy = TRUE;
77             }
78         }
79     }
80     if (!snapy) {
81         if (cl < tr && cr > tl) {
82             if (ct >= tb && t < tb && t >= tb - resist)
83                 *y = tb, snapy = TRUE;
84             else if (cb <= tt && b > tt &&
85                      b <= tt + resist)
86                 *y = tt - h + 1, snapy = TRUE;
87             if (snapy) {
88                 /* try to corner snap to the window */
89                 if (cl > tl && l <= tl &&
90                     l > tl - resist)
91                     *x = tl + 1, snapx = TRUE;
92                 else if (cr < tr && r >= tr &&
93                          r < tr + resist)
94                     *x = tr - w, snapx = TRUE;
95             }
96         }
97     }
98
99     return snapx && snapy;
100 }
101
102 void resist_move_windows(ObClient *c, gint resist, gint *x, gint *y)
103 {
104     GList *it;
105     Rect dock_area;
106
107     if (!resist) return;
108
109     frame_client_gravity(c->frame, x, y);
110
111
112     for (it = stacking_list; it; it = g_list_next(it)) {
113         ObClient *target;
114
115         if (!WINDOW_IS_CLIENT(it->data))
116             continue;
117         target = it->data;
118
119         /* don't snap to self or non-visibles */
120         if (!target->frame->visible || target == c)
121             continue;
122         /* don't snap to windows set to below and skip_taskbar (desklets) */
123         if (target->below && !c->below && target->skip_taskbar)
124             continue;
125
126         if (resist_move_window(c->frame->area, target->frame->area,
127                                resist, x, y))
128             break;
129     }
130     dock_get_area(&dock_area);
131     resist_move_window(c->frame->area, dock_area, resist, x, y);
132
133     frame_frame_gravity(c->frame, x, y);
134 }
135
136 void resist_move_monitors(ObClient *c, gint resist, gint *x, gint *y)
137 {
138     Rect *area;
139     const Rect *parea;
140     guint i;
141     gint l, t, r, b; /* requested edges */
142     gint al, at, ar, ab; /* screen area edges */
143     gint pl, pt, pr, pb; /* physical screen area edges */
144     gint cl, ct, cr, cb; /* current edges */
145     gint w, h; /* current size */
146     Rect desired_area;
147
148     if (!resist) return;
149
150     frame_client_gravity(c->frame, x, y);
151
152     w = c->frame->area.width;
153     h = c->frame->area.height;
154
155     l = *x;
156     t = *y;
157     r = l + w - 1;
158     b = t + h - 1;
159
160     cl = RECT_LEFT(c->frame->area);
161     ct = RECT_TOP(c->frame->area);
162     cr = RECT_RIGHT(c->frame->area);
163     cb = RECT_BOTTOM(c->frame->area);
164
165     RECT_SET(desired_area, c->frame->area.x, c->frame->area.y,
166              c->frame->area.width, c->frame->area.height);
167
168     for (i = 0; i < screen_num_monitors; ++i) {
169         parea = screen_physical_area_monitor(i);
170
171         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area))
172             continue;
173
174         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
175                            &desired_area);
176
177         al = RECT_LEFT(*area);
178         at = RECT_TOP(*area);
179         ar = RECT_RIGHT(*area);
180         ab = RECT_BOTTOM(*area);
181         pl = RECT_LEFT(*parea);
182         pt = RECT_TOP(*parea);
183         pr = RECT_RIGHT(*parea);
184         pb = RECT_BOTTOM(*parea);
185
186         if (cl >= al && l < al && l >= al - resist)
187             *x = al;
188         else if (cr <= ar && r > ar && r <= ar + resist)
189             *x = ar - w + 1;
190         else if (cl >= pl && l < pl && l >= pl - resist)
191             *x = pl;
192         else if (cr <= pr && r > pr && r <= pr + resist)
193             *x = pr - w + 1;
194
195         if (ct >= at && t < at && t >= at - resist)
196             *y = at;
197         else if (cb <= ab && b > ab && b < ab + resist)
198             *y = ab - h + 1;
199         else if (ct >= pt && t < pt && t >= pt - resist)
200             *y = pt;
201         else if (cb <= pb && b > pb && b < pb + resist)
202             *y = pb - h + 1;
203
204         g_slice_free(Rect, area);
205     }
206
207     frame_frame_gravity(c->frame, x, y);
208 }
209
210 static gboolean resist_size_window(Rect window, Rect target, gint resist,
211                                    gint *w, gint *h, ObDirection dir)
212 {
213     gint l, t, r, b; /* my left, top, right and bottom sides */
214     gint tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides*/
215     gint dlt, drb; /* my destination left/top and right/bottom sides */
216     gboolean snapx = 0, snapy = 0;
217     gint orgw, orgh;
218
219     l = RECT_LEFT(window);
220     t = RECT_TOP(window);
221     r = RECT_RIGHT(window);
222     b = RECT_BOTTOM(window);
223
224     orgw = window.width;
225     orgh = window.height;
226
227     tl = RECT_LEFT(target);
228     tt = RECT_TOP(target);
229     tr = RECT_RIGHT(target);
230     tb = RECT_BOTTOM(target);
231
232     if (!snapx) {
233         /* horizontal snapping */
234         if (t < tb && b > tt) {
235             switch (dir) {
236             case OB_DIRECTION_EAST:
237             case OB_DIRECTION_NORTHEAST:
238             case OB_DIRECTION_SOUTHEAST:
239             case OB_DIRECTION_NORTH:
240             case OB_DIRECTION_SOUTH:
241                 dlt = l;
242                 drb = r + *w - orgw;
243                 if (r < tl && drb >= tl &&
244                     drb < tl + resist)
245                     *w = tl - l, snapx = TRUE;
246                 break;
247             case OB_DIRECTION_WEST:
248             case OB_DIRECTION_NORTHWEST:
249             case OB_DIRECTION_SOUTHWEST:
250                 dlt = l - *w + orgw;
251                 drb = r;
252                 if (l > tr && dlt <= tr &&
253                     dlt > tr - resist)
254                     *w = r - tr, snapx = TRUE;
255                 break;
256             }
257         }
258     }
259
260     if (!snapy) {
261         /* vertical snapping */
262         if (l < tr && r > tl) {
263             switch (dir) {
264             case OB_DIRECTION_SOUTH:
265             case OB_DIRECTION_SOUTHWEST:
266             case OB_DIRECTION_SOUTHEAST:
267             case OB_DIRECTION_EAST:
268             case OB_DIRECTION_WEST:
269                 dlt = t;
270                 drb = b + *h - orgh;
271                 if (b < tt && drb >= tt &&
272                     drb < tt + resist)
273                     *h = tt - t, snapy = TRUE;
274                 break;
275             case OB_DIRECTION_NORTH:
276             case OB_DIRECTION_NORTHWEST:
277             case OB_DIRECTION_NORTHEAST:
278                 dlt = t - *h + orgh;
279                 drb = b;
280                 if (t > tb && dlt <= tb &&
281                     dlt > tb - resist)
282                     *h = b - tb, snapy = TRUE;
283                 break;
284             }
285         }
286     }
287
288     /* snapped both ways */
289     return snapx && snapy;
290 }
291
292 void resist_size_windows(ObClient *c, gint resist, gint *w, gint *h,
293                          ObDirection dir)
294 {
295     GList *it;
296     ObClient *target; /* target */
297     Rect dock_area;
298
299     if (!resist) return;
300
301     for (it = stacking_list; it; it = g_list_next(it)) {
302         if (!WINDOW_IS_CLIENT(it->data))
303             continue;
304         target = it->data;
305
306         /* don't snap to invisibles or ourself */
307         if (!target->frame->visible || target == c)
308             continue;
309         /* don't snap to windows set to below and skip_taskbar (desklets) */
310         if (target->below && !c->below && target->skip_taskbar)
311             continue;
312
313         if (resist_size_window(c->frame->area, target->frame->area,
314                                resist, w, h, dir))
315             break;
316     }
317     dock_get_area(&dock_area);
318     resist_size_window(c->frame->area, dock_area,
319                        resist, w, h, dir);
320 }
321
322 void resist_size_monitors(ObClient *c, gint resist, gint *w, gint *h,
323                           ObDirection dir)
324 {
325     gint l, t, r, b; /* my left, top, right and bottom sides */
326     gint dlt, drb; /* my destination left/top and right/bottom sides */
327     Rect *area;
328     const Rect *parea;
329     gint al, at, ar, ab; /* screen boundaries */
330     gint pl, pt, pr, pb; /* physical screen boundaries */
331     guint i;
332     Rect desired_area;
333
334     if (!resist) return;
335
336     l = RECT_LEFT(c->frame->area);
337     r = RECT_RIGHT(c->frame->area);
338     t = RECT_TOP(c->frame->area);
339     b = RECT_BOTTOM(c->frame->area);
340
341     RECT_SET(desired_area, c->area.x, c->area.y, *w, *h);
342
343     for (i = 0; i < screen_num_monitors; ++i) {
344         parea = screen_physical_area_monitor(i);
345
346         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area))
347             continue;
348
349         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
350                            &desired_area);
351
352         /* get the screen boundaries */
353         al = RECT_LEFT(*area);
354         at = RECT_TOP(*area);
355         ar = RECT_RIGHT(*area);
356         ab = RECT_BOTTOM(*area);
357         pl = RECT_LEFT(*parea);
358         pt = RECT_TOP(*parea);
359         pr = RECT_RIGHT(*parea);
360         pb = RECT_BOTTOM(*parea);
361
362         /* horizontal snapping */
363         switch (dir) {
364         case OB_DIRECTION_EAST:
365         case OB_DIRECTION_NORTHEAST:
366         case OB_DIRECTION_SOUTHEAST:
367         case OB_DIRECTION_NORTH:
368         case OB_DIRECTION_SOUTH:
369             dlt = l;
370             drb = r + *w - c->frame->area.width;
371             if (r <= ar && drb > ar && drb <= ar + resist)
372                 *w = ar - l + 1;
373             else if (r <= pr && drb > pr && drb <= pr + resist)
374                 *w = pr - l + 1;
375             break;
376         case OB_DIRECTION_WEST:
377         case OB_DIRECTION_NORTHWEST:
378         case OB_DIRECTION_SOUTHWEST:
379             dlt = l - *w + c->frame->area.width;
380             drb = r;
381             if (l >= al && dlt < al && dlt >= al - resist)
382                 *w = r - al + 1;
383             else if (l >= pl && dlt < pl && dlt >= pl - resist)
384                 *w = r - pl + 1;
385             break;
386         }
387
388         /* vertical snapping */
389         switch (dir) {
390         case OB_DIRECTION_SOUTH:
391         case OB_DIRECTION_SOUTHWEST:
392         case OB_DIRECTION_SOUTHEAST:
393         case OB_DIRECTION_WEST:
394         case OB_DIRECTION_EAST:
395             dlt = t;
396             drb = b + *h - c->frame->area.height;
397             if (b <= ab && drb > ab && drb <= ab + resist)
398                 *h = ab - t + 1;
399             else if (b <= pb && drb > pb && drb <= pb + resist)
400                 *h = pb - t + 1;
401             break;
402         case OB_DIRECTION_NORTH:
403         case OB_DIRECTION_NORTHWEST:
404         case OB_DIRECTION_NORTHEAST:
405             dlt = t - *h + c->frame->area.height;
406             drb = b;
407             if (t >= at && dlt < at && dlt >= at - resist)
408                 *h = b - at + 1;
409             else if (t >= pt && dlt < pt && dlt >= pt - resist)
410                 *h = b - pt + 1;
411             break;
412         }
413
414         g_slice_free(Rect, area);
415     }
416 }