Dogcows Code - chaz/openbox/blob - openbox/focus.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    focus.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 "debug.h"
  21 #include "event.h"
  22 #include "openbox.h"
  23 #include "grab.h"
  24 #include "client.h"
  25 #include "config.h"
  26 #include "focus_cycle.h"
  27 #include "screen.h"
  28 #include "prop.h"
  29 #include "keyboard.h"
  30 #include "focus.h"
  31 #include "stacking.h"
  32
  33 #include <X11/Xlib.h>
  34 #include <glib.h>
  35
  36 #define FOCUS_INDICATOR_WIDTH 6
  37
  38 ObClient *focus_client = NULL;
  39 GList *focus_order = NULL;
  40
  41 void focus_startup(gboolean reconfig)
  42 {
  43     if (reconfig) return;
  44
  45     /* start with nothing focused */
  46     focus_nothing();
  47 }
  48
  49 void focus_shutdown(gboolean reconfig)
  50 {
  51     if (reconfig) return;
  52
  53     /* reset focus to root */
  54     XSetInputFocus(ob_display, PointerRoot, RevertToNone, CurrentTime);
  55 }
  56
  57 static void push_to_top(ObClient *client)
  58 {
  59     focus_order = g_list_remove(focus_order, client);
  60     focus_order = g_list_prepend(focus_order, client);
  61 }
  62
  63 void focus_set_client(ObClient *client)
  64 {
  65     Window active;
  66
  67     ob_debug_type(OB_DEBUG_FOCUS,
  68                   "focus_set_client 0x%lx\n", client ? client->window : 0);
  69
  70     if (focus_client == client)
  71         return;
  72
  73     /* uninstall the old colormap, and install the new one */
  74     screen_install_colormap(focus_client, FALSE);
  75     screen_install_colormap(client, TRUE);
  76
  77     /* in the middle of cycling..? kill it. */
  78     focus_cycle_stop(focus_client);
  79     focus_cycle_stop(client);
  80
  81     focus_client = client;
  82
  83     if (client != NULL) {
  84         /* move to the top of the list */
  85         push_to_top(client);
  86         /* remove hiliting from the window when it gets focused */
  87         client_hilite(client, FALSE);
  88     }
  89
  90     /* set the NET_ACTIVE_WINDOW hint, but preserve it on shutdown */
  91     if (ob_state() != OB_STATE_EXITING) {
  92         active = client ? client->window : None;
  93         PROP_SET32(RootWindow(ob_display, ob_screen),
  94                    net_active_window, window, active);
  95     }
  96 }
  97
  98 static ObClient* focus_fallback_target(gboolean allow_refocus,
  99                                        gboolean allow_pointer,
 100                                        ObClient *old)
 101 {
 102     GList *it;
 103     ObClient *c;
 104
 105     ob_debug_type(OB_DEBUG_FOCUS, "trying pointer stuff\n");
 106     if (allow_pointer && config_focus_follow)
 107         if ((c = client_under_pointer()) &&
 108             (allow_refocus || c != old) &&
 109             (client_normal(c) &&
 110              client_focus(c)))
 111         {
 112             ob_debug_type(OB_DEBUG_FOCUS, "found in pointer stuff\n");
 113             return c;
 114         }
 115
 116     ob_debug_type(OB_DEBUG_FOCUS, "trying the focus order\n");
 117     for (it = focus_order; it; it = g_list_next(it)) {
 118         c = it->data;
 119         /* fallback focus to a window if:
 120            1. it is on the current desktop. this ignores omnipresent
 121            windows, which are problematic in their own rite.
 122            2. it is a normal type window, don't fall back onto a dock or
 123            a splashscreen or a desktop window (save the desktop as a
 124            backup fallback though)
 125         */
 126         if (c->desktop == screen_desktop &&
 127             client_normal(c) &&
 128             (allow_refocus || c != old) &&
 129             client_focus(c))
 130         {
 131             ob_debug_type(OB_DEBUG_FOCUS, "found in focus order\n");
 132             return c;
 133         }
 134     }
 135
 136     ob_debug_type(OB_DEBUG_FOCUS, "trying a desktop window\n");
 137     for (it = focus_order; it; it = g_list_next(it)) {
 138         c = it->data;
 139         /* fallback focus to a window if:
 140            1. it is on the current desktop. this ignores omnipresent
 141            windows, which are problematic in their own rite.
 142            2. it is a normal type window, don't fall back onto a dock or
 143            a splashscreen or a desktop window (save the desktop as a
 144            backup fallback though)
 145         */
 146         if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 147             (allow_refocus || c != old) &&
 148             client_focus(c))
 149         {
 150             ob_debug_type(OB_DEBUG_FOCUS, "found a desktop window\n");
 151             return c;
 152         }
 153     }
 154
 155     return NULL;
 156 }
 157
 158 ObClient* focus_fallback(gboolean allow_refocus, gboolean allow_pointer)
 159 {
 160     ObClient *new;
 161     ObClient *old = focus_client;
 162
 163     /* unfocus any focused clients.. they can be focused by Pointer events
 164        and such, and then when we try focus them, we won't get a FocusIn
 165        event at all for them. */
 166     focus_nothing();
 167
 168     new = focus_fallback_target(allow_refocus, allow_pointer, old);
 169     /* get what was really focused */
 170     if (new) new = client_focus_target(new);
 171
 172     return new;
 173 }
 174
 175 void focus_nothing()
 176 {
 177     /* Install our own colormap */
 178     if (focus_client != NULL) {
 179         screen_install_colormap(focus_client, FALSE);
 180         screen_install_colormap(NULL, TRUE);
 181     }
 182
 183     /* nothing is focused, update the colormap and _the root property_ */
 184     focus_set_client(NULL);
 185
 186     /* if there is a grab going on, then we need to cancel it. if we move
 187        focus during the grab, applications will get NotifyWhileGrabbed events
 188        and ignore them !
 189
 190        actions should not rely on being able to move focus during an
 191        interactive grab.
 192     */
 193     if (keyboard_interactively_grabbed())
 194         keyboard_interactive_cancel();
 195
 196     /* when nothing will be focused, send focus to the backup target */
 197     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 198                    event_curtime);
 199 }
 200
 201 void focus_order_add_new(ObClient *c)
 202 {
 203     if (c->iconic)
 204         focus_order_to_top(c);
 205     else {
 206         g_assert(!g_list_find(focus_order, c));
 207         /* if there are any iconic windows, put this above them in the order,
 208            but if there are not, then put it under the currently focused one */
 209         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 210             focus_order = g_list_insert(focus_order, c, 0);
 211         else
 212             focus_order = g_list_insert(focus_order, c, 1);
 213     }
 214
 215     /* in the middle of cycling..? kill it. */
 216     focus_cycle_stop(c);
 217 }
 218
 219 void focus_order_remove(ObClient *c)
 220 {
 221     focus_order = g_list_remove(focus_order, c);
 222
 223     /* in the middle of cycling..? kill it. */
 224     focus_cycle_stop(c);
 225 }
 226
 227 void focus_order_to_top(ObClient *c)
 228 {
 229     focus_order = g_list_remove(focus_order, c);
 230     if (!c->iconic) {
 231         focus_order = g_list_prepend(focus_order, c);
 232     } else {
 233         GList *it;
 234
 235         /* insert before first iconic window */
 236         for (it = focus_order;
 237              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 238         focus_order = g_list_insert_before(focus_order, it, c);
 239     }
 240 }
 241
 242 void focus_order_to_bottom(ObClient *c)
 243 {
 244     focus_order = g_list_remove(focus_order, c);
 245     if (c->iconic) {
 246         focus_order = g_list_append(focus_order, c);
 247     } else {
 248         GList *it;
 249
 250         /* insert before first iconic window */
 251         for (it = focus_order;
 252              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 253         focus_order = g_list_insert_before(focus_order, it, c);
 254     }
 255 }
 256
 257 ObClient *focus_order_find_first(guint desktop)
 258 {
 259     GList *it;
 260     for (it = focus_order; it; it = g_list_next(it)) {
 261         ObClient *c = it->data;
 262         if (c->desktop == desktop || c->desktop == DESKTOP_ALL)
 263             return c;
 264     }
 265     return NULL;
 266 }