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                                        gboolean allow_omnipresent,
 101                                        ObClient *old)
 102 {
 103     GList *it;
 104     ObClient *c;
 105
 106     ob_debug_type(OB_DEBUG_FOCUS, "trying pointer stuff\n");
 107     if (allow_pointer && config_focus_follow)
 108         if ((c = client_under_pointer()) &&
 109             (allow_refocus || client_focus_target(c) != old) &&
 110             (client_normal(c) &&
 111              client_focus(c)))
 112         {
 113             ob_debug_type(OB_DEBUG_FOCUS, "found in pointer stuff\n");
 114             return c;
 115         }
 116
 117     ob_debug_type(OB_DEBUG_FOCUS, "trying the focus order\n");
 118     for (it = focus_order; it; it = g_list_next(it)) {
 119         c = it->data;
 120         /* fallback focus to a window if:
 121            1. it is on the current desktop. this ignores omnipresent
 122            windows, which are problematic in their own rite, unless they are
 123            specifically allowed
 124            2. it is a normal type window, don't fall back onto a dock or
 125            a splashscreen or a desktop window (save the desktop as a
 126            backup fallback though)
 127         */
 128         if ((allow_omnipresent || c->desktop == screen_desktop) &&
 129             client_normal(c) &&
 130             (allow_refocus || client_focus_target(c) != old) &&
 131             client_focus(c))
 132         {
 133             ob_debug_type(OB_DEBUG_FOCUS, "found in focus order\n");
 134             return c;
 135         }
 136     }
 137
 138     ob_debug_type(OB_DEBUG_FOCUS, "trying a desktop window\n");
 139     for (it = focus_order; it; it = g_list_next(it)) {
 140         c = it->data;
 141         /* fallback focus to a window if:
 142            1. it is on the current desktop. this ignores omnipresent
 143            windows, which are problematic in their own rite.
 144            2. it is a normal type window, don't fall back onto a dock or
 145            a splashscreen or a desktop window (save the desktop as a
 146            backup fallback though)
 147         */
 148         if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 149             (allow_refocus || client_focus_target(c) != old) &&
 150             client_focus(c))
 151         {
 152             ob_debug_type(OB_DEBUG_FOCUS, "found a desktop window\n");
 153             return c;
 154         }
 155     }
 156
 157     return NULL;
 158 }
 159
 160 ObClient* focus_fallback(gboolean allow_refocus, gboolean allow_pointer,
 161                          gboolean allow_omnipresent)
 162 {
 163     ObClient *new;
 164     ObClient *old = focus_client;
 165
 166     /* unfocus any focused clients.. they can be focused by Pointer events
 167        and such, and then when we try focus them, we won't get a FocusIn
 168        event at all for them. */
 169     focus_nothing();
 170
 171     new = focus_fallback_target(allow_refocus, allow_pointer,
 172                                 allow_omnipresent, old);
 173     /* get what was really focused */
 174     if (new) new = client_focus_target(new);
 175
 176     return new;
 177 }
 178
 179 void focus_nothing()
 180 {
 181     /* Install our own colormap */
 182     if (focus_client != NULL) {
 183         screen_install_colormap(focus_client, FALSE);
 184         screen_install_colormap(NULL, TRUE);
 185     }
 186
 187     /* nothing is focused, update the colormap and _the root property_ */
 188     focus_set_client(NULL);
 189
 190     /* if there is a grab going on, then we need to cancel it. if we move
 191        focus during the grab, applications will get NotifyWhileGrabbed events
 192        and ignore them !
 193
 194        actions should not rely on being able to move focus during an
 195        interactive grab.
 196     */
 197     event_cancel_all_key_grabs();
 198
 199     /* when nothing will be focused, send focus to the backup target */
 200     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 201                    event_curtime);
 202 }
 203
 204 void focus_order_add_new(ObClient *c)
 205 {
 206     if (c->iconic)
 207         focus_order_to_top(c);
 208     else {
 209         g_assert(!g_list_find(focus_order, c));
 210         /* if there are any iconic windows, put this above them in the order,
 211            but if there are not, then put it under the currently focused one */
 212         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 213             focus_order = g_list_insert(focus_order, c, 0);
 214         else
 215             focus_order = g_list_insert(focus_order, c, 1);
 216     }
 217
 218     /* in the middle of cycling..? kill it. */
 219     focus_cycle_stop(c);
 220 }
 221
 222 void focus_order_remove(ObClient *c)
 223 {
 224     focus_order = g_list_remove(focus_order, c);
 225
 226     /* in the middle of cycling..? kill it. */
 227     focus_cycle_stop(c);
 228 }
 229
 230 void focus_order_to_top(ObClient *c)
 231 {
 232     focus_order = g_list_remove(focus_order, c);
 233     if (!c->iconic) {
 234         focus_order = g_list_prepend(focus_order, c);
 235     } else {
 236         GList *it;
 237
 238         /* insert before first iconic window */
 239         for (it = focus_order;
 240              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 241         focus_order = g_list_insert_before(focus_order, it, c);
 242     }
 243 }
 244
 245 void focus_order_to_bottom(ObClient *c)
 246 {
 247     focus_order = g_list_remove(focus_order, c);
 248     if (c->iconic) {
 249         focus_order = g_list_append(focus_order, c);
 250     } else {
 251         GList *it;
 252
 253         /* insert before first iconic window */
 254         for (it = focus_order;
 255              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 256         focus_order = g_list_insert_before(focus_order, it, c);
 257     }
 258 }
 259
 260 ObClient *focus_order_find_first(guint desktop)
 261 {
 262     GList *it;
 263     for (it = focus_order; it; it = g_list_next(it)) {
 264         ObClient *c = it->data;
 265         if (c->desktop == desktop || c->desktop == DESKTOP_ALL)
 266             return c;
 267     }
 268     return NULL;
 269 }