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)
  98 {
  99     GList *it;
 100     ObClient *c;
 101     ObClient *old = focus_client;
 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 omnipresentness\n");
 115     if (allow_refocus && old &&
 116         old->desktop == DESKTOP_ALL &&
 117         client_normal(old) &&
 118         client_focus(old))
 119     {
 120         ob_debug_type(OB_DEBUG_FOCUS, "found in omnipresentness\n");
 121         return old;
 122     }
 123
 124
 125     ob_debug_type(OB_DEBUG_FOCUS, "trying the focus order\n");
 126     for (it = focus_order; it; it = g_list_next(it)) {
 127         c = it->data;
 128         /* fallback focus to a window if:
 129            1. it is on the current desktop. this ignores omnipresent
 130            windows, which are problematic in their own rite.
 131            2. it is a normal type window, don't fall back onto a dock or
 132            a splashscreen or a desktop window (save the desktop as a
 133            backup fallback though)
 134         */
 135         if (c->desktop == screen_desktop &&
 136             client_normal(c) &&
 137             (allow_refocus || c != old) &&
 138             client_focus(c))
 139         {
 140             ob_debug_type(OB_DEBUG_FOCUS, "found in focus order\n");
 141             return c;
 142         }
 143     }
 144
 145     ob_debug_type(OB_DEBUG_FOCUS, "trying a desktop window\n");
 146     for (it = focus_order; it; it = g_list_next(it)) {
 147         c = it->data;
 148         /* fallback focus to a window if:
 149            1. it is on the current desktop. this ignores omnipresent
 150            windows, which are problematic in their own rite.
 151            2. it is a normal type window, don't fall back onto a dock or
 152            a splashscreen or a desktop window (save the desktop as a
 153            backup fallback though)
 154         */
 155         if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 156             (allow_refocus || c != old) &&
 157             client_focus(c))
 158         {
 159             ob_debug_type(OB_DEBUG_FOCUS, "found a desktop window\n");
 160             return c;
 161         }
 162     }
 163
 164     return NULL;
 165 }
 166
 167 ObClient* focus_fallback(gboolean allow_refocus)
 168 {
 169     ObClient *new;
 170
 171     /* unfocus any focused clients.. they can be focused by Pointer events
 172        and such, and then when we try focus them, we won't get a FocusIn
 173        event at all for them. */
 174     focus_nothing();
 175
 176     new = focus_fallback_target(allow_refocus);
 177
 178     return new;
 179 }
 180
 181 void focus_nothing()
 182 {
 183     /* Install our own colormap */
 184     if (focus_client != NULL) {
 185         screen_install_colormap(focus_client, FALSE);
 186         screen_install_colormap(NULL, TRUE);
 187     }
 188
 189     /* nothing is focused, update the colormap and _the root property_ */
 190     focus_set_client(NULL);
 191
 192     /* if there is a grab going on, then we need to cancel it. if we move
 193        focus during the grab, applications will get NotifyWhileGrabbed events
 194        and ignore them !
 195
 196        actions should not rely on being able to move focus during an
 197        interactive grab.
 198     */
 199     if (keyboard_interactively_grabbed())
 200         keyboard_interactive_cancel();
 201
 202     /* when nothing will be focused, send focus to the backup target */
 203     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 204                    event_curtime);
 205 }
 206
 207 void focus_order_remove(ObClient *c)
 208 {
 209     focus_order = g_list_remove(focus_order, c);
 210 }
 211
 212 void focus_order_to_top(ObClient *c)
 213 {
 214     focus_order = g_list_remove(focus_order, c);
 215     if (!c->iconic) {
 216         focus_order = g_list_prepend(focus_order, c);
 217     } else {
 218         GList *it;
 219
 220         /* insert before first iconic window */
 221         for (it = focus_order;
 222              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 223         focus_order = g_list_insert_before(focus_order, it, c);
 224     }
 225 }
 226
 227 void focus_order_to_bottom(ObClient *c)
 228 {
 229     focus_order = g_list_remove(focus_order, c);
 230     if (c->iconic) {
 231         focus_order = g_list_append(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 ObClient *focus_order_find_first(guint desktop)
 243 {
 244     GList *it;
 245     for (it = focus_order; it; it = g_list_next(it)) {
 246         ObClient *c = it->data;
 247         if (c->desktop == desktop || c->desktop == DESKTOP_ALL)
 248             return c;
 249     }
 250     return NULL;
 251 }