ungrab only as many times as we grabbed
[mikachu/openbox.git] / openbox / keyboard.c
1 #include "mainloop.h"
2 #include "focus.h"
3 #include "screen.h"
4 #include "frame.h"
5 #include "openbox.h"
6 #include "event.h"
7 #include "grab.h"
8 #include "client.h"
9 #include "action.h"
10 #include "prop.h"
11 #include "config.h"
12 #include "keytree.h"
13 #include "keyboard.h"
14 #include "translate.h"
15
16 #include <glib.h>
17
18 KeyBindingTree *keyboard_firstnode;
19
20 typedef struct {
21     guint state;
22     ObClient *client;
23     ObAction *action;
24     ObFrameContext context;
25 } ObInteractiveState;
26
27 static GSList *interactive_states;
28
29 static KeyBindingTree *curpos;
30
31 static void grab_for_window(Window win, gboolean grab)
32 {
33     KeyBindingTree *p;
34
35     ungrab_all_keys(win);
36
37     if (grab) {
38         p = curpos ? curpos->first_child : keyboard_firstnode;
39         while (p) {
40             grab_key(p->key, p->state, win, GrabModeAsync);
41             p = p->next_sibling;
42         }
43         if (curpos)
44             grab_key(config_keyboard_reset_keycode,
45                      config_keyboard_reset_state,
46                      win, GrabModeAsync);
47     }
48 }
49
50 void keyboard_grab_for_client(ObClient *c, gboolean grab)
51 {
52     grab_for_window(c->window, grab);
53 }
54
55 static void grab_keys(gboolean grab)
56 {
57     GList *it;
58
59     grab_for_window(screen_support_win, grab);
60     for (it = client_list; it; it = g_list_next(it))
61         grab_for_window(((ObClient*)it->data)->window, grab);
62 }
63
64 static gboolean chain_timeout(gpointer data)
65 {
66     keyboard_reset_chains();
67
68     return FALSE; /* don't repeat */
69 }
70
71 void keyboard_reset_chains()
72 {
73     ob_main_loop_timeout_remove(ob_main_loop, chain_timeout);
74
75     if (curpos) {
76         grab_keys(FALSE);
77         curpos = NULL;
78         grab_keys(TRUE);
79     }
80 }
81
82 gboolean keyboard_bind(GList *keylist, ObAction *action)
83 {
84     KeyBindingTree *tree, *t;
85     gboolean conflict;
86     gboolean mods = TRUE;
87
88     g_assert(keylist != NULL);
89     g_assert(action != NULL);
90
91     if (!(tree = tree_build(keylist)))
92         return FALSE;
93
94     if ((t = tree_find(tree, &conflict)) != NULL) {
95         /* already bound to something, use the existing tree */
96         tree_destroy(tree);
97         tree = NULL;
98     } else
99         t = tree;
100
101     if (conflict) {
102         g_warning("conflict with binding");
103         tree_destroy(tree);
104         return FALSE;
105     }
106
107     /* find if every key in this chain has modifiers, and also find the
108        bottom node of the tree */
109     while (t->first_child) {
110         if (!t->state)
111             mods = FALSE;
112         t = t->first_child;
113     }
114
115     /* when there are no modifiers in the binding, then the action cannot
116        be interactive */
117     if (!mods && action->data.any.interactive) {
118         action->data.any.interactive = FALSE;
119         action->data.inter.final = TRUE;
120     }
121
122     /* set the action */
123     t->actions = g_slist_append(t->actions, action);
124     /* assimilate this built tree into the main tree. assimilation
125        destroys/uses the tree */
126     if (tree) tree_assimilate(tree);
127
128     return TRUE;
129 }
130
131 void keyboard_interactive_grab(guint state, ObClient *client,
132                                ObFrameContext context, ObAction *action)
133 {
134     ObInteractiveState *s;
135
136     if (!interactive_states) {
137         if (!grab_keyboard(TRUE))
138             return;
139         if (!grab_pointer(TRUE, OB_CURSOR_NONE)) {
140             grab_keyboard(FALSE);
141             return;
142         }
143     }
144
145     s = g_new(ObInteractiveState, 1);
146
147     s->state = state;
148     s->client = client;
149     s->action = action;
150     s->context = context;
151
152     interactive_states = g_slist_append(interactive_states, s);
153 }
154
155 gboolean keyboard_process_interactive_grab(const XEvent *e,
156                                            ObClient **client,
157                                            ObFrameContext *context)
158 {
159     GSList *it, *next;
160     gboolean handled = FALSE;
161     gboolean done = FALSE;
162     gboolean cancel = FALSE;
163
164     for (it = interactive_states; it; it = next) {
165         ObInteractiveState *s = it->data;
166
167         next = g_slist_next(it);
168         
169         *client = s->client;
170         *context = s->context;
171
172         if ((e->type == KeyRelease && 
173              !(s->state & e->xkey.state)))
174             done = TRUE;
175         else if (e->type == KeyPress) {
176             if (e->xkey.keycode == ob_keycode(OB_KEY_RETURN))
177                 done = TRUE;
178             else if (e->xkey.keycode == ob_keycode(OB_KEY_ESCAPE))
179                 cancel = done = TRUE;
180         }
181         if (done) {
182             g_assert(s->action->data.any.interactive);
183
184             s->action->data.inter.cancel = cancel;
185             s->action->data.inter.final = TRUE;
186
187             s->action->func(&s->action->data);
188
189             g_free(s);
190
191             interactive_states = g_slist_delete_link(interactive_states, it);
192             if (!interactive_states) {
193                 grab_keyboard(FALSE);
194                 grab_pointer(FALSE, OB_CURSOR_NONE);
195                 keyboard_reset_chains();
196             }
197
198             handled = TRUE;
199         }
200     }
201
202     return handled;
203 }
204
205 void keyboard_event(ObClient *client, const XEvent *e)
206 {
207     KeyBindingTree *p;
208
209     g_assert(e->type == KeyPress);
210
211     if (e->xkey.keycode == config_keyboard_reset_keycode &&
212         e->xkey.state == config_keyboard_reset_state)
213     {
214         keyboard_reset_chains();
215         return;
216     }
217
218     if (curpos == NULL)
219         p = keyboard_firstnode;
220     else
221         p = curpos->first_child;
222     while (p) {
223         if (p->key == e->xkey.keycode &&
224             p->state == e->xkey.state) {
225             if (p->first_child != NULL) { /* part of a chain */
226                 ob_main_loop_timeout_remove(ob_main_loop, chain_timeout);
227                 /* 5 second timeout for chains */
228                 ob_main_loop_timeout_add(ob_main_loop, 5 * G_USEC_PER_SEC,
229                                          chain_timeout, NULL, NULL);
230                 grab_keys(FALSE);
231                 curpos = p;
232                 grab_keys(TRUE);
233             } else {
234                 GSList *it;
235                 for (it = p->actions; it; it = it->next) {
236                     ObAction *act = it->data;
237                     if (act->func != NULL) {
238                         act->data.any.c = client;
239
240                         if (act->func == action_moveresize) {
241                             screen_pointer_pos(&act->data.moveresize.x,
242                                                &act->data.moveresize.y);
243                         }
244
245                         if (act->data.any.interactive) {
246                             act->data.inter.cancel = FALSE;
247                             act->data.inter.final = FALSE;
248                             keyboard_interactive_grab(e->xkey.state, client,
249                                                       0, act);
250                         }
251
252                         if (act->func == action_showmenu) {
253                             act->data.showmenu.x = e->xkey.x_root;
254                             act->data.showmenu.y = e->xkey.y_root;
255                         }
256
257                         act->data.any.c = client;
258                         act->func(&act->data);
259                     }
260                 }
261
262                 keyboard_reset_chains();
263             }
264             break;
265         }
266         p = p->next_sibling;
267     }
268 }
269
270 void keyboard_startup(gboolean reconfig)
271 {
272     grab_keys(TRUE);
273 }
274
275 void keyboard_shutdown(gboolean reconfig)
276 {
277     GSList *it;
278
279     tree_destroy(keyboard_firstnode);
280     keyboard_firstnode = NULL;
281
282     for (it = interactive_states; it; it = g_slist_next(it))
283         g_free(it->data);
284     g_slist_free(interactive_states);
285     interactive_states = NULL;
286
287     ob_main_loop_timeout_remove(ob_main_loop, chain_timeout);
288     grab_keys(FALSE);
289     curpos = NULL;
290 }
291