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Viewing changes to libtomboy/tomboykeybinder.c

Tags: upstream-0.3.1
Import upstream version 0.3.1

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libtomboy/tomboykeybinder.c
 
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#include <gdk/gdk.h>
 
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#include <gdk/gdkwindow.h>
 
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#include <gdk/gdkx.h>
 
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#include <X11/Xlib.h>
 
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#include "eggaccelerators.h"
 
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#include "tomboykeybinder.h"
 
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static GSList *bindings = NULL;
 
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/* Uncomment the next line to print a debug trace. */
 
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/* #define DEBUG */
 
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#ifdef DEBUG
 
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#  define TRACE(x) x
 
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#else
 
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#  define TRACE(x) do {} while (FALSE);
 
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#endif
 
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typedef struct _Binding {
 
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        TomboyBindkeyHandler  handler;
 
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        gpointer              user_data;
 
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        char                 *keystring;
 
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        uint                  keycode;
 
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        uint                  modifiers;
 
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} Binding;
 
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static gboolean 
 
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do_grab_key (Binding *binding)
 
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{
 
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        GdkKeymap *keymap = gdk_keymap_get_default ();
 
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        GdkWindow *rootwin = gdk_get_default_root_window ();
 
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        EggVirtualModifierType virtual_mods = 0;
 
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        guint keysym = 0;
 
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        if (keymap == NULL || rootwin == NULL)
 
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                return FALSE;
 
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        if (!egg_accelerator_parse_virtual (binding->keystring, 
 
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                                            &keysym, 
 
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                                            &virtual_mods))
 
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                return FALSE;
 
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        TRACE (g_print ("Got accel %d, %d\n", keysym, virtual_mods));
 
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        binding->keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (rootwin), 
 
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                                             keysym);
 
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        if (binding->keycode == 0)
 
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                return FALSE;
 
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        TRACE (g_print ("Got keycode %d\n", binding->keycode));
 
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        egg_keymap_resolve_virtual_modifiers (keymap,
 
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                                              virtual_mods,
 
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                                              &binding->modifiers);
 
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        TRACE (g_print ("Got modmask %d\n", binding->modifiers));
 
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        XGrabKey (GDK_WINDOW_XDISPLAY (rootwin),
 
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                  binding->keycode,
 
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                  binding->modifiers,
 
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                  GDK_WINDOW_XWINDOW (rootwin),
 
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                  True,
 
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                  GrabModeAsync, 
 
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                  GrabModeAsync);
 
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        return TRUE;
 
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}
 
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static gboolean 
 
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do_ungrab_key (Binding *binding)
 
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{
 
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        GdkWindow *rootwin = gdk_get_default_root_window ();
 
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        TRACE (g_print ("Removing grab for '%s'\n", binding->keystring));
 
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        XUngrabKey (GDK_WINDOW_XDISPLAY (rootwin),
 
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                    binding->keycode,
 
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                    binding->modifiers,
 
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                    GDK_WINDOW_XWINDOW (rootwin));
 
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        return TRUE;
 
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}
 
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static GdkFilterReturn
 
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filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
 
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{
 
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        GdkFilterReturn return_val = GDK_FILTER_CONTINUE;
 
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        XEvent *xevent = (XEvent *) gdk_xevent;
 
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        GSList *iter;
 
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        TRACE (g_print ("Got Event! %d, %d\n", xevent->type, event->type));
 
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        switch (xevent->type) {
 
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        case KeyPress:
 
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                TRACE (g_print ("Got KeyPress! keycode: %d, modifiers: %d\n", 
 
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                                xevent->xkey.keycode, 
 
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                                xevent->xkey.state));
 
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                for (iter = bindings; iter != NULL; iter = iter->next) {
 
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                        Binding *binding = (Binding *) iter->data;
 
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                        if (binding->keycode == xevent->xkey.keycode &&
 
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                            binding->modifiers == xevent->xkey.state) {
 
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                                TRACE (g_print ("Calling handler for '%s'...\n", 
 
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                                                binding->keystring));
 
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                                (binding->handler) (binding->keystring, 
 
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                                                    binding->user_data);
 
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                        }
 
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                }
 
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                break;
 
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        case KeyRelease:
 
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                TRACE (g_print ("Got KeyRelease! \n"));
 
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                break;
 
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        }
 
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        return return_val;
 
123
}
 
124
 
 
125
void 
 
126
keymap_changed (GdkKeymap *map)
 
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{
 
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        GSList *iter;
 
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        TRACE (g_print ("Keymap changed! Regrabbing keys..."));
 
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        for (iter = bindings; iter != NULL; iter = iter->next) {
 
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                Binding *binding = (Binding *) iter->data;
 
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                do_ungrab_key (binding);
 
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                do_grab_key (binding);
 
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        }
 
138
}
 
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140
void 
 
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tomboy_keybinder_init (void)
 
142
{
 
143
        GdkKeymap *keymap = gdk_keymap_get_default ();
 
144
        GdkWindow *rootwin = gdk_get_default_root_window ();
 
145
 
 
146
        gdk_window_add_filter (rootwin, 
 
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                               filter_func, 
 
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                               NULL);
 
149
 
 
150
        g_signal_connect (keymap, 
 
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                          "keys_changed",
 
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                          G_CALLBACK (keymap_changed),
 
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                          NULL);
 
154
}
 
155
 
 
156
void 
 
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tomboy_keybinder_bind (const char           *keystring,
 
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                       TomboyBindkeyHandler  handler,
 
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                       gpointer              user_data)
 
160
{
 
161
        Binding *binding;
 
162
        gboolean success;
 
163
 
 
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        binding = g_new0 (Binding, 1);
 
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        binding->keystring = g_strdup (keystring);
 
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        binding->handler = handler;
 
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        binding->user_data = user_data;
 
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        /* Sets the binding's keycode and modifiers */
 
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        success = do_grab_key (binding);
 
171
 
 
172
        if (success) {
 
173
                bindings = g_slist_prepend (bindings, binding);
 
174
        } else {
 
175
                g_free (binding->keystring);
 
176
                g_free (binding);
 
177
        }
 
178
}
 
179
 
 
180
void
 
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tomboy_keybinder_unbind (const char           *keystring, 
 
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                         TomboyBindkeyHandler  handler)
 
183
{
 
184
        GSList *iter;
 
185
 
 
186
        for (iter = bindings; iter != NULL; iter = iter->next) {
 
187
                Binding *binding = (Binding *) iter->data;
 
188
 
 
189
                if (strcmp (keystring, binding->keystring) != 0 ||
 
190
                    handler != binding->handler) 
 
191
                        continue;
 
192
 
 
193
                do_ungrab_key (binding);
 
194
 
 
195
                bindings = g_slist_remove (bindings, binding);
 
196
 
 
197
                g_free (binding->keystring);
 
198
                g_free (binding);
 
199
                break;
 
200
        }
 
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}
 
202
 
 
203
/* 
 
204
 * From eggcellrenderkeys.c.
 
205
 */
 
206
gboolean
 
207
tomboy_keybinder_is_modifier (guint keycode)
 
208
{
 
209
        gint i;
 
210
        gint map_size;
 
211
        XModifierKeymap *mod_keymap;
 
212
        gboolean retval = FALSE;
 
213
 
 
214
        mod_keymap = XGetModifierMapping (gdk_display);
 
215
 
 
216
        map_size = 8 * mod_keymap->max_keypermod;
 
217
 
 
218
        i = 0;
 
219
        while (i < map_size) {
 
220
                if (keycode == mod_keymap->modifiermap[i]) {
 
221
                        retval = TRUE;
 
222
                        break;
 
223
                }
 
224
                ++i;
 
225
        }
 
226
 
 
227
        XFreeModifiermap (mod_keymap);
 
228
 
 
229
        return retval;
 
230
}