add support for interactive/keyboard move/resize
[dana/openbox.git] / openbox / focus.c
1 #include "event.h"
2 #include "openbox.h"
3 #include "client.h"
4 #include "config.h"
5 #include "frame.h"
6 #include "screen.h"
7 #include "group.h"
8 #include "prop.h"
9 #include "dispatch.h"
10 #include "focus.h"
11 #include "parse.h"
12 #include "stacking.h"
13
14 #include <X11/Xlib.h>
15 #include <glib.h>
16
17 Client *focus_client = NULL;
18 GList **focus_order = NULL; /* these lists are created when screen_startup
19                                sets the number of desktops */
20
21 Window focus_backup = None;
22
23 static gboolean noreorder = 0;
24
25 void focus_startup()
26 {
27     /* create the window which gets focus when no clients get it. Have to
28        make it override-redirect so we don't try manage it, since it is
29        mapped. */
30     XSetWindowAttributes attrib;
31
32     focus_client = NULL;
33
34     attrib.override_redirect = TRUE;
35     focus_backup = XCreateWindow(ob_display, ob_root,
36                                  -100, -100, 1, 1, 0,
37                                  CopyFromParent, InputOutput, CopyFromParent,
38                                  CWOverrideRedirect, &attrib);
39     XMapWindow(ob_display, focus_backup);
40     stacking_raise_internal(focus_backup);
41
42     /* start with nothing focused */
43     focus_set_client(NULL);
44 }
45
46 void focus_shutdown()
47 {
48     guint i;
49
50     for (i = 0; i < screen_num_desktops; ++i)
51         g_list_free(focus_order[i]);
52     g_free(focus_order);
53     focus_order = NULL;
54
55     XDestroyWindow(ob_display, focus_backup);
56
57     /* reset focus to root */
58     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
59                    event_lasttime);
60 }
61
62 static void push_to_top(Client *client)
63 {
64     guint desktop;
65
66     desktop = client->desktop;
67     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
68     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
69     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
70 }
71
72 void focus_set_client(Client *client)
73 {
74     Window active;
75     Client *old;
76
77     /* uninstall the old colormap, and install the new one */
78     screen_install_colormap(focus_client, FALSE);
79     screen_install_colormap(client, TRUE);
80
81     if (client == NULL) {
82         /* when nothing will be focused, send focus to the backup target */
83         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
84                        event_lasttime);
85         XSync(ob_display, FALSE);
86     }
87
88     old = focus_client;
89     focus_client = client;
90
91     /* move to the top of the list */
92     if (noreorder)
93         --noreorder;
94     else if (client != NULL)
95         push_to_top(client);
96
97     /* set the NET_ACTIVE_WINDOW hint */
98     active = client ? client->window : None;
99     PROP_SET32(ob_root, net_active_window, window, active);
100
101     if (focus_client != NULL)
102         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
103     if (old != NULL)
104         dispatch_client(Event_Client_Unfocus, old, 0, 0);
105 }
106
107 static gboolean focus_under_pointer()
108 {
109     int x, y;
110     GList *it;
111
112     if (ob_pointer_pos(&x, &y)) {
113         for (it = stacking_list; it != NULL; it = it->next) {
114             Client *c = it->data;
115             if (c->desktop == screen_desktop &&
116                 RECT_CONTAINS(c->frame->area, x, y))
117                 break;
118         }
119         if (it != NULL)
120             return client_normal(it->data) && client_focus(it->data);
121     }
122     return FALSE;
123 }
124
125 void focus_fallback(FallbackType type)
126 {
127     GList *it;
128     Client *old = NULL;
129
130     old = focus_client;
131
132     /* unfocus any focused clients.. they can be focused by Pointer events
133        and such, and then when I try focus them, I won't get a FocusIn event
134        at all for them.
135     */
136     focus_set_client(NULL);
137
138     if (!(type == Fallback_Desktop ?
139           config_focus_last_on_desktop : config_focus_last)) {
140         if (config_focus_follow) focus_under_pointer();
141         return;
142     }
143
144     if (type == Fallback_Unfocusing && old && old->transient_for) {
145         if (old->transient_for == TRAN_GROUP) {
146             for (it = focus_order[screen_desktop]; it != NULL; it = it->next) {
147                 GSList *sit;
148
149                 for (sit = old->group->members; sit; sit = sit->next)
150                     if (sit->data == it->data && client_focus(sit->data))
151                         return;
152             }
153         } else {
154             if (client_normal(old->transient_for))
155                 if (client_focus(old->transient_for))
156                     return;
157         }
158     }
159
160     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
161         if (type != Fallback_Unfocusing || it->data != old)
162             if (client_normal(it->data) && client_focus(it->data))
163                 return;
164
165     /* nothing to focus */
166     focus_set_client(NULL);
167 }
168
169 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
170                  gboolean cancel)
171 {
172     static Client *first = NULL;
173     static Client *t = NULL;
174     static GList *order = NULL;
175     GList *it, *start, *list;
176     Client *ft;
177
178     if (cancel) {
179         if (first) client_focus(first);
180         goto done_cycle;
181     } else if (done) {
182         if (focus_client) {
183             push_to_top(focus_client); /* move to top of focus_order */
184             stacking_raise(focus_client);
185         }
186         goto done_cycle;
187     }
188     if (!first) first = focus_client;
189
190     if (linear) list = client_list;
191     else        list = focus_order[screen_desktop];
192
193     start = it = g_list_find(list, focus_client);
194     if (!start) /* switched desktops or something? */
195         start = it = forward ? g_list_last(list) : g_list_first(list);
196     if (!start) goto done_cycle;
197
198     do {
199         if (forward) {
200             it = it->next;
201             if (it == NULL) it = list;
202         } else {
203             it = it->prev;
204             if (it == NULL) it = g_list_last(list);
205         }
206         ft = client_focus_target(it->data);
207         if (ft == it->data && focus_client != ft && client_normal(ft) &&
208             client_focus(ft)) {
209             noreorder++; /* avoid reordering the focus_order */
210             return ft;
211         }
212     } while (it != start);
213     return NULL;
214
215 done_cycle:
216     t = NULL;
217     first = NULL;
218     g_list_free(order);
219     order = NULL;
220     return NULL;
221 }