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();
  79
  80     focus_client = client;
  81
  82     if (client != NULL) {
  83         /* move to the top of the list */
  84         push_to_top(client);
  85         /* remove hiliting from the window when it gets focused */
  86         client_hilite(client, FALSE);
  87     }
  88
  89     /* set the NET_ACTIVE_WINDOW hint, but preserve it on shutdown */
  90     if (ob_state() != OB_STATE_EXITING) {
  91         active = client ? client->window : None;
  92         PROP_SET32(RootWindow(ob_display, ob_screen),
  93                    net_active_window, window, active);
  94     }
  95 }
  96
  97 static ObClient* focus_fallback_target(gboolean allow_refocus, ObClient *old,
  98                                        gboolean send_focus)
  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             /* if we're sending focus then try to */
 109             ((send_focus && client_focus(c)) ||
 110              /* if not just see if we could try, or it's already focused */
 111              (!send_focus && (c == old || client_can_focus(c)))))
 112         {
 113             ob_debug_type(OB_DEBUG_FOCUS, "found in pointer stuff (%d)\n",
 114                           send_focus);
 115             return c;
 116         }
 117
 118     ob_debug_type(OB_DEBUG_FOCUS, "trying omnipresentness\n");
 119     if (allow_refocus && old &&
 120         old->desktop == DESKTOP_ALL &&
 121         client_normal(old) &&
 122         /* this one is only for when not sending focus, to keep it there */
 123         !send_focus)
 124     {
 125         ob_debug_type(OB_DEBUG_FOCUS, "found in omnipresentness (%d)\n",
 126                       send_focus);
 127         return old;
 128     }
 129
 130
 131     ob_debug_type(OB_DEBUG_FOCUS, "trying the focus order\n");
 132     for (it = focus_order; it; it = g_list_next(it)) {
 133         c = it->data;
 134         /* fallback focus to a window if:
 135            1. it is on the current desktop. this ignores omnipresent
 136            windows, which are problematic in their own rite.
 137            2. it is a normal type window, don't fall back onto a dock or
 138            a splashscreen or a desktop window (save the desktop as a
 139            backup fallback though)
 140         */
 141         if (c->desktop == screen_desktop &&
 142             client_normal(c) &&
 143             (allow_refocus || c != old) &&
 144             /* if we're sending focus then try to */
 145             ((send_focus && client_focus(c)) ||
 146              /* if not just see if we could try, or it's already focused */
 147              (!send_focus && (c == old || client_can_focus(c)))))
 148         {
 149             ob_debug_type(OB_DEBUG_FOCUS, "found in focus order (%d)\n",
 150                           send_focus);
 151             return c;
 152         }
 153     }
 154
 155     ob_debug_type(OB_DEBUG_FOCUS, "trying a desktop window\n");
 156     for (it = focus_order; it; it = g_list_next(it)) {
 157         c = it->data;
 158         /* fallback focus to a window if:
 159            1. it is on the current desktop. this ignores omnipresent
 160            windows, which are problematic in their own rite.
 161            2. it is a normal type window, don't fall back onto a dock or
 162            a splashscreen or a desktop window (save the desktop as a
 163            backup fallback though)
 164         */
 165         if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 166             (allow_refocus || c != old) &&
 167             /* if we're sending focus then try to */
 168             ((send_focus && client_focus(c)) ||
 169              /* if not just see if we could try, or it's already focused */
 170              (!send_focus && (c == old || client_can_focus(c)))))
 171         {
 172             ob_debug_type(OB_DEBUG_FOCUS, "found a desktop window (%d)\n",
 173                           send_focus);
 174             return c;
 175         }
 176     }
 177
 178     return NULL;
 179 }
 180
 181 ObClient* focus_fallback(gboolean allow_refocus)
 182 {
 183     ObClient *new;
 184     ObClient *old = focus_client;
 185
 186     new = focus_fallback_target(allow_refocus, old, FALSE);
 187     if (new == old) return;
 188
 189     /* unfocus any focused clients.. they can be focused by Pointer events
 190        and such, and then when we try focus them, we won't get a FocusIn
 191        event at all for them. */
 192     focus_nothing();
 193
 194     new = focus_fallback_target(allow_refocus, old, TRUE);
 195
 196     return new;
 197 }
 198
 199 void focus_nothing()
 200 {
 201     /* Install our own colormap */
 202     if (focus_client != NULL) {
 203         screen_install_colormap(focus_client, FALSE);
 204         screen_install_colormap(NULL, TRUE);
 205     }
 206
 207     /* nothing is focused, update the colormap and _the root property_ */
 208     focus_set_client(NULL);
 209
 210     /* if there is a grab going on, then we need to cancel it. if we move
 211        focus during the grab, applications will get NotifyWhileGrabbed events
 212        and ignore them !
 213
 214        actions should not rely on being able to move focus during an
 215        interactive grab.
 216     */
 217     if (keyboard_interactively_grabbed())
 218         keyboard_interactive_cancel();
 219
 220     /* when nothing will be focused, send focus to the backup target */
 221     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 222                    event_curtime);
 223 }
 224
 225 void focus_order_remove(ObClient *c)
 226 {
 227     focus_order = g_list_remove(focus_order, 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 }