Various fixes for sparse warnings.
[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 "client.h"
21 #include "frame.h"
22 #include "stacking.h"
23 #include "screen.h"
24 #include "dock.h"
25 #include "config.h"
26 #include "resist.h"
27 #include "parser/parse.h"
28
29 #include <glib.h>
30
31 static gboolean resist_move_window(Rect window,
32                                    Rect target, gint resist,
33                                    gint *x, gint *y)
34 {
35     gint l, t, r, b; /* requested edges */
36     gint cl, ct, cr, cb; /* current edges */
37     gint w, h; /* current size */
38     gint tl, tt, tr, tb; /* 1 past the target's edges on each side */
39     gboolean snapx = 0, snapy = 0;
40
41     w = window.width;
42     h = window.height;
43
44     l = *x;
45     t = *y;
46     r = l + w - 1;
47     b = t + h - 1;
48
49     cl = RECT_LEFT(window);
50     ct = RECT_TOP(window);
51     cr = RECT_RIGHT(window);
52     cb = RECT_BOTTOM(window);
53
54     tl = RECT_LEFT(target) - 1;
55     tt = RECT_TOP(target) - 1;
56     tr = RECT_RIGHT(target) + 1;
57     tb = RECT_BOTTOM(target) + 1;
58
59     /* snapx and snapy ensure that the window snaps to the top-most
60        window edge available, without going all the way from
61        bottom-to-top in the stacking list
62     */
63     if (!snapx) {
64         if (ct < tb && cb > tt) {
65             if (cl >= tr && l < tr && l >= tr - resist)
66                 *x = tr, snapx = TRUE;
67             else if (cr <= tl && r > tl &&
68                      r <= tl + resist)
69                 *x = tl - w + 1, snapx = TRUE;
70             if (snapx) {
71                 /* try to corner snap to the window */
72                 if (ct > tt && t <= tt &&
73                     t > tt - resist)
74                     *y = tt + 1, snapy = TRUE;
75                 else if (cb < tb && b >= tb &&
76                          b < tb + resist)
77                     *y = tb - h, snapy = TRUE;
78             }
79         }
80     }
81     if (!snapy) {
82         if (cl < tr && cr > tl) {
83             if (ct >= tb && t < tb && t >= tb - resist)
84                 *y = tb, snapy = TRUE;
85             else if (cb <= tt && b > tt &&
86                      b <= tt + resist)
87                 *y = tt - h + 1, snapy = TRUE;
88             if (snapy) {
89                 /* try to corner snap to the window */
90                 if (cl > tl && l <= tl &&
91                     l > tl - resist)
92                     *x = tl + 1, snapx = TRUE;
93                 else if (cr < tr && r >= tr &&
94                          r < tr + resist)
95                     *x = tr - w, snapx = TRUE;
96             }
97         }
98     }
99
100     return snapx && snapy;
101 }
102
103 void resist_move_windows(ObClient *c, gint resist, gint *x, gint *y)
104 {
105     GList *it;
106     Rect dock_area;
107
108     if (!resist) return;
109
110     frame_client_gravity(c->frame, x, y);
111
112
113     for (it = stacking_list; it; it = g_list_next(it)) {
114         ObClient *target;
115
116         if (!WINDOW_IS_CLIENT(it->data))
117             continue;
118         target = it->data;
119
120         /* don't snap to self or non-visibles */
121         if (!target->frame->visible || target == c)
122             continue;
123         /* don't snap to windows set to below and skip_taskbar (desklets) */
124         if (target->below && !c->below && target->skip_taskbar)
125             continue;
126
127         if (resist_move_window(c->frame->area, target->frame->area,
128                                resist, x, y))
129             break;
130     }
131     dock_get_area(&dock_area);
132     resist_move_window(c->frame->area, dock_area, resist, x, y);
133
134     frame_frame_gravity(c->frame, x, y);
135 }
136
137 void resist_move_monitors(ObClient *c, gint resist, gint *x, gint *y)
138 {
139     Rect *area, *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, *x, *y, c->area.width, c->area.height);
166
167     for (i = 0; i < screen_num_monitors; ++i) {
168         parea = screen_physical_area_monitor(i);
169
170         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area)) {
171             g_free(parea);
172             continue;
173         }
174
175         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
176                            &desired_area);
177
178         al = RECT_LEFT(*area);
179         at = RECT_TOP(*area);
180         ar = RECT_RIGHT(*area);
181         ab = RECT_BOTTOM(*area);
182         pl = RECT_LEFT(*parea);
183         pt = RECT_TOP(*parea);
184         pr = RECT_RIGHT(*parea);
185         pb = RECT_BOTTOM(*parea);
186
187         if (cl >= al && l < al && l >= al - resist)
188             *x = al;
189         else if (cr <= ar && r > ar && r <= ar + resist)
190             *x = ar - w + 1;
191         else if (cl >= pl && l < pl && l >= pl - resist)
192             *x = pl;
193         else if (cr <= pr && r > pr && r <= pr + resist)
194             *x = pr - w + 1;
195
196         if (ct >= at && t < at && t >= at - resist)
197             *y = at;
198         else if (cb <= ab && b > ab && b < ab + resist)
199             *y = ab - h + 1;
200         else if (ct >= pt && t < pt && t >= pt - resist)
201             *y = pt;
202         else if (cb <= pb && b > pb && b < pb + resist)
203             *y = pb - h + 1;
204
205         g_free(area);
206         g_free(parea);
207     }
208
209     frame_frame_gravity(c->frame, x, y);
210 }
211
212 static gboolean resist_size_window(Rect window, Rect target, gint resist,
213                                    gint *w, gint *h, ObDirection dir)
214 {
215     gint l, t, r, b; /* my left, top, right and bottom sides */
216     gint tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides*/
217     gint dlt, drb; /* my destination left/top and right/bottom sides */
218     gboolean snapx = 0, snapy = 0;
219     gint orgw, orgh;
220
221     l = RECT_LEFT(window);
222     t = RECT_TOP(window);
223     r = RECT_RIGHT(window);
224     b = RECT_BOTTOM(window);
225
226     orgw = window.width;
227     orgh = window.height;
228
229     tl = RECT_LEFT(target);
230     tt = RECT_TOP(target);
231     tr = RECT_RIGHT(target);
232     tb = RECT_BOTTOM(target);
233
234     if (!snapx) {
235         /* horizontal snapping */
236         if (t < tb && b > tt) {
237             switch (dir) {
238             case OB_DIRECTION_EAST:
239             case OB_DIRECTION_NORTHEAST:
240             case OB_DIRECTION_SOUTHEAST:
241             case OB_DIRECTION_NORTH:
242             case OB_DIRECTION_SOUTH:
243                 dlt = l;
244                 drb = r + *w - orgw;
245                 if (r < tl && drb >= tl &&
246                     drb < tl + resist)
247                     *w = tl - l, snapx = TRUE;
248                 break;
249             case OB_DIRECTION_WEST:
250             case OB_DIRECTION_NORTHWEST:
251             case OB_DIRECTION_SOUTHWEST:
252                 dlt = l - *w + orgw;
253                 drb = r;
254                 if (l > tr && dlt <= tr &&
255                     dlt > tr - resist)
256                     *w = r - tr, snapx = TRUE;
257                 break;
258             }
259         }
260     }
261
262     if (!snapy) {
263         /* vertical snapping */
264         if (l < tr && r > tl) {
265             switch (dir) {
266             case OB_DIRECTION_SOUTH:
267             case OB_DIRECTION_SOUTHWEST:
268             case OB_DIRECTION_SOUTHEAST:
269             case OB_DIRECTION_EAST:
270             case OB_DIRECTION_WEST:
271                 dlt = t;
272                 drb = b + *h - orgh;
273                 if (b < tt && drb >= tt &&
274                     drb < tt + resist)
275                     *h = tt - t, snapy = TRUE;
276                 break;
277             case OB_DIRECTION_NORTH:
278             case OB_DIRECTION_NORTHWEST:
279             case OB_DIRECTION_NORTHEAST:
280                 dlt = t - *h + orgh;
281                 drb = b;
282                 if (t > tb && dlt <= tb &&
283                     dlt > tb - resist)
284                     *h = b - tb, snapy = TRUE;
285                 break;
286             }
287         }
288     }
289
290     /* snapped both ways */
291     return snapx && snapy;
292 }
293
294 void resist_size_windows(ObClient *c, gint resist, gint *w, gint *h,
295                          ObDirection dir)
296 {
297     GList *it;
298     ObClient *target; /* target */
299     Rect dock_area;
300
301     if (!resist) return;
302
303     for (it = stacking_list; it; it = g_list_next(it)) {
304         if (!WINDOW_IS_CLIENT(it->data))
305             continue;
306         target = it->data;
307
308         /* don't snap to invisibles or ourself */
309         if (!target->frame->visible || target == c)
310             continue;
311         /* don't snap to windows set to below and skip_taskbar (desklets) */
312         if (target->below && !c->below && target->skip_taskbar)
313             continue;
314
315         if (resist_size_window(c->frame->area, target->frame->area,
316                                resist, w, h, dir))
317             break;
318     }
319     dock_get_area(&dock_area);
320     resist_size_window(c->frame->area, dock_area,
321                        resist, w, h, dir);
322 }
323
324 void resist_size_monitors(ObClient *c, gint resist, gint *w, gint *h,
325                           ObDirection dir)
326 {
327     gint l, t, r, b; /* my left, top, right and bottom sides */
328     gint dlt, drb; /* my destination left/top and right/bottom sides */
329     Rect *area, *parea;
330     gint al, at, ar, ab; /* screen boundaries */
331     gint pl, pt, pr, pb; /* physical screen boundaries */
332     gint incw, inch;
333     guint i;
334     Rect desired_area;
335
336     if (!resist) return;
337
338     l = RECT_LEFT(c->frame->area);
339     r = RECT_RIGHT(c->frame->area);
340     t = RECT_TOP(c->frame->area);
341     b = RECT_BOTTOM(c->frame->area);
342
343     incw = c->size_inc.width;
344     inch = c->size_inc.height;
345
346     RECT_SET(desired_area, c->area.x, c->area.y, *w, *h);
347
348     for (i = 0; i < screen_num_monitors; ++i) {
349         parea = screen_physical_area_monitor(i);
350
351         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area)) {
352             g_free(parea);
353             continue;
354         }
355
356         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
357                            &desired_area);
358
359         /* get the screen boundaries */
360         al = RECT_LEFT(*area);
361         at = RECT_TOP(*area);
362         ar = RECT_RIGHT(*area);
363         ab = RECT_BOTTOM(*area);
364         pl = RECT_LEFT(*parea);
365         pt = RECT_TOP(*parea);
366         pr = RECT_RIGHT(*parea);
367         pb = RECT_BOTTOM(*parea);
368
369         /* horizontal snapping */
370         switch (dir) {
371         case OB_DIRECTION_EAST:
372         case OB_DIRECTION_NORTHEAST:
373         case OB_DIRECTION_SOUTHEAST:
374         case OB_DIRECTION_NORTH:
375         case OB_DIRECTION_SOUTH:
376             dlt = l;
377             drb = r + *w - c->frame->area.width;
378             if (r <= ar && drb > ar && drb <= ar + resist)
379                 *w = ar - l + 1;
380             else if (r <= pr && drb > pr && drb <= pr + resist)
381                 *w = pr - l + 1;
382             break;
383         case OB_DIRECTION_WEST:
384         case OB_DIRECTION_NORTHWEST:
385         case OB_DIRECTION_SOUTHWEST:
386             dlt = l - *w + c->frame->area.width;
387             drb = r;
388             if (l >= al && dlt < al && dlt >= al - resist)
389                 *w = r - al + 1;
390             else if (l >= pl && dlt < pl && dlt >= pl - resist)
391                 *w = r - pl + 1;
392             break;
393         }
394
395         /* vertical snapping */
396         switch (dir) {
397         case OB_DIRECTION_SOUTH:
398         case OB_DIRECTION_SOUTHWEST:
399         case OB_DIRECTION_SOUTHEAST:
400         case OB_DIRECTION_WEST:
401         case OB_DIRECTION_EAST:
402             dlt = t;
403             drb = b + *h - c->frame->area.height;
404             if (b <= ab && drb > ab && drb <= ab + resist)
405                 *h = ab - t + 1;
406             else if (b <= pb && drb > pb && drb <= pb + resist)
407                 *h = pb - t + 1;
408             break;
409         case OB_DIRECTION_NORTH:
410         case OB_DIRECTION_NORTHWEST:
411         case OB_DIRECTION_NORTHEAST:
412             dlt = t - *h + c->frame->area.height;
413             drb = b;
414             if (t >= at && dlt < at && dlt >= at - resist)
415                 *h = b - at + 1;
416             else if (t >= pt && dlt < pt && dlt >= pt - resist)
417                 *h = b - pt + 1;
418             break;
419         }
420
421         g_free(area);
422         g_free(parea);
423     }
424 }