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     /* Don't set focus_client to NULL here. It will be set to NULL when the
 190        FocusOut event comes. Otherwise, if we focus nothing and then focus the
 191        same window again, The focus code says nothing changed, but focus_client
 192        ends up being NULL anyways.
 193     focus_client = NULL;
 194     */
 195
 196     /* if there is a grab going on, then we need to cancel it. if we move
 197        focus during the grab, applications will get NotifyWhileGrabbed events
 198        and ignore them !
 199
 200        actions should not rely on being able to move focus during an
 201        interactive grab.
 202     */
 203     if (keyboard_interactively_grabbed())
 204         keyboard_interactive_cancel();
 205
 206     /* when nothing will be focused, send focus to the backup target */
 207     XSetInputFocus(ob_display, screen_support_win, RevertToPointerRoot,
 208                    event_curtime);
 209 }
 210
 211 void focus_order_remove(ObClient *c)
 212 {
 213     focus_order = g_list_remove(focus_order, c);
 214 }
 215
 216 void focus_order_to_top(ObClient *c)
 217 {
 218     focus_order = g_list_remove(focus_order, c);
 219     if (!c->iconic) {
 220         focus_order = g_list_prepend(focus_order, c);
 221     } else {
 222         GList *it;
 223
 224         /* insert before first iconic window */
 225         for (it = focus_order;
 226              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 227         focus_order = g_list_insert_before(focus_order, it, c);
 228     }
 229 }
 230
 231 void focus_order_to_bottom(ObClient *c)
 232 {
 233     focus_order = g_list_remove(focus_order, c);
 234     if (c->iconic) {
 235         focus_order = g_list_append(focus_order, c);
 236     } else {
 237         GList *it;
 238
 239         /* insert before first iconic window */
 240         for (it = focus_order;
 241              it && !((ObClient*)it->data)->iconic; it = g_list_next(it));
 242         focus_order = g_list_insert_before(focus_order, it, c);
 243     }
 244 }
 245
 246 ObClient *focus_order_find_first(guint desktop)
 247 {
 248     GList *it;
 249     for (it = focus_order; it; it = g_list_next(it)) {
 250         ObClient *c = it->data;
 251         if (c->desktop == desktop || c->desktop == DESKTOP_ALL)
 252             return c;
 253     }
 254     return NULL;
 255 }