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, ObClient *old)
  99 {
 100     GList *it;
 101     ObClient *c;
 102
 103     ob_debug_type(OB_DEBUG_FOCUS, "trying pointer stuff\n");
 104     if (config_focus_follow && !config_focus_last)
 105         if ((c = client_under_pointer()) &&
 106             (allow_refocus || c != old) &&
 107             (client_normal(c) &&
 108              client_focus(c)))
 109         {
 110             ob_debug_type(OB_DEBUG_FOCUS, "found in pointer stuff\n");
 111             return c;
 112         }
 113
 114     ob_debug_type(OB_DEBUG_FOCUS, "trying the focus order\n");
 115     for (it = focus_order; it; it = g_list_next(it)) {
 116         c = it->data;
 117         /* fallback focus to a window if:
 118            1. it is on the current desktop. this ignores omnipresent
 119            windows, which are problematic in their own rite.
 120            2. it is a normal type window, don't fall back onto a dock or
 121            a splashscreen or a desktop window (save the desktop as a
 122            backup fallback though)
 123         */
 124         if (c->desktop == screen_desktop &&
 125             client_normal(c) &&
 126             (allow_refocus || c != old) &&
 127             client_focus(c))
 128         {
 129             ob_debug_type(OB_DEBUG_FOCUS, "found in focus order\n");
 130             return c;
 131         }
 132     }
 133
 134     ob_debug_type(OB_DEBUG_FOCUS, "trying a desktop window\n");
 135     for (it = focus_order; it; it = g_list_next(it)) {
 136         c = it->data;
 137         /* fallback focus to a window if:
 138            1. it is on the current desktop. this ignores omnipresent
 139            windows, which are problematic in their own rite.
 140            2. it is a normal type window, don't fall back onto a dock or
 141            a splashscreen or a desktop window (save the desktop as a
 142            backup fallback though)
 143         */
 144         if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 145             (allow_refocus || c != old) &&
 146             client_focus(c))
 147         {
 148             ob_debug_type(OB_DEBUG_FOCUS, "found a desktop window\n");
 149             return c;
 150         }
 151     }
 152
 153     return NULL;
 154 }
 155
 156 ObClient* focus_fallback(gboolean allow_refocus)
 157 {
 158     ObClient *new;
 159     ObClient *old = focus_client;
 160
 161     /* unfocus any focused clients.. they can be focused by Pointer events
 162        and such, and then when we try focus them, we won't get a FocusIn
 163        event at all for them. */
 164     focus_nothing();
 165
 166     new = focus_fallback_target(allow_refocus, old);
 167
 168     return new;
 169 }
 170
 171 void focus_nothing()
 172 {
 173     /* Install our own colormap */
 174     if (focus_client != NULL) {
 175         screen_install_colormap(focus_client, FALSE);
 176         screen_install_colormap(NULL, TRUE);
 177     }
 178
 179     /* nothing is focused, update the colormap and _the root property_ */
 180     focus_set_client(NULL);
 181
 182     /* if there is a grab going on, then we need to cancel it. if we move
 183        focus during the grab, applications will get NotifyWhileGrabbed events
 184        and ignore them !
 185
 186        actions should not rely on being able to move focus during an
 187        interactive grab.
 188     */
 189     if (keyboard_interactively_grabbed())
 190         keyboard_interactive_cancel();
 191
 192     /* when nothing will be focused, send focus to the backup target */
 193     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 194                    event_curtime);
 195 }
 196
 197 void focus_order_add_new(ObClient *c)
 198 {
 199     if (c->iconic)
 200         focus_order_to_top(c);
 201     else {
 202         g_assert(!g_list_find(focus_order, c));
 203         /* if there are any iconic windows, put this above them in the order,
 204            but if there are not, then put it under the currently focused one */
 205         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 206             focus_order = g_list_insert(focus_order, c, 0);
 207         else
 208             focus_order = g_list_insert(focus_order, c, 1);
 209     }
 210
 211     /* in the middle of cycling..? kill it. */
 212     focus_cycle_stop(c);
 213 }
 214
 215 void focus_order_remove(ObClient *c)
 216 {
 217     focus_order = g_list_remove(focus_order, c);
 218
 219     /* in the middle of cycling..? kill it. */
 220     focus_cycle_stop(c);
 221 }
 222
 223 void focus_order_to_top(ObClient *c)
 224 {
 225     focus_order = g_list_remove(focus_order, c);
 226     if (!c->iconic) {
 227         focus_order = g_list_prepend(focus_order, c);
 228     } else {
 229         GList *it;
 230
 231         /* insert before first iconic window */
 232         for (it = focus_order;
 233              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 234         focus_order = g_list_insert_before(focus_order, it, c);
 235     }
 236 }
 237
 238 void focus_order_to_bottom(ObClient *c)
 239 {
 240     focus_order = g_list_remove(focus_order, c);
 241     if (c->iconic) {
 242         focus_order = g_list_append(focus_order, c);
 243     } else {
 244         GList *it;
 245
 246         /* insert before first iconic window */
 247         for (it = focus_order;
 248              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 249         focus_order = g_list_insert_before(focus_order, it, c);
 250     }
 251 }
 252
 253 ObClient *focus_order_find_first(guint desktop)
 254 {
 255     GList *it;
 256     for (it = focus_order; it; it = g_list_next(it)) {
 257         ObClient *c = it->data;
 258         if (c->desktop == desktop || c->desktop == DESKTOP_ALL)
 259             return c;
 260     }
 261     return NULL;
 262 }