window.c

   1 /*
   2  * window.c - window handling functions
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <xcb/xcb.h>
  23 #include <xcb/xcb_atom.h>
  24
  25 #include "window.h"
  26 #include "common/atoms.h"
  27
  28 /** Set client state (WM_STATE) property.
  29  * \param win The window to set state.
  30  * \param state The state to set.
  31  */
  32 void
  33 window_state_set(xcb_window_t win, long state)
  34 {
  35     long data[] = { state, XCB_NONE };
  36     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
  37                         WM_STATE, WM_STATE, 32, 2, data);
  38 }
  39
  40 /** Send request to get a window state (WM_STATE).
  41  * \param w A client window.
  42  * \return The cookie associated with the request.
  43  */
  44 xcb_get_property_cookie_t
  45 window_state_get_unchecked(xcb_window_t w)
  46 {
  47     return xcb_get_property_unchecked(globalconf.connection, false, w, WM_STATE,
  48                                       WM_STATE, 0L, 2L);
  49 }
  50
  51 /** Get a window state (WM_STATE).
  52  * \param cookie The cookie.
  53  * \return The current state of the window, or 0 on error.
  54  */
  55 uint32_t
  56 window_state_get_reply(xcb_get_property_cookie_t cookie)
  57 {
  58     uint32_t result = 0;
  59     xcb_get_property_reply_t *prop_r;
  60
  61     if((prop_r = xcb_get_property_reply(globalconf.connection, cookie, NULL)))
  62     {
  63         if(xcb_get_property_value_length(prop_r))
  64             result = *(uint32_t *) xcb_get_property_value(prop_r);
  65
  66         p_delete(&prop_r);
  67     }
  68
  69     return result;
  70 }
  71
  72 /** Configure a window with its new geometry and border size.
  73  * \param win The X window id to configure.
  74  * \param geometry The new window geometry.
  75  * \param border The new border size.
  76  */
  77 void
  78 window_configure(xcb_window_t win, area_t geometry, int border)
  79 {
  80     xcb_configure_notify_event_t ce;
  81
  82     ce.response_type = XCB_CONFIGURE_NOTIFY;
  83     ce.event = win;
  84     ce.window = win;
  85     ce.x = geometry.x;
  86     ce.y = geometry.y;
  87     ce.width = geometry.width;
  88     ce.height = geometry.height;
  89     ce.border_width = border;
  90     ce.above_sibling = XCB_NONE;
  91     ce.override_redirect = false;
  92     xcb_send_event(globalconf.connection, false, win, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *) &ce);
  93 }
  94
  95 /** Get the opacity of a window.
  96  * \param win The window.
  97  * \return The opacity, between 0 and 1 or -1 or no opacity set.
  98  */
  99 double
 100 window_opacity_get(xcb_window_t win)
 101 {
 102     double ret;
 103
 104     xcb_get_property_cookie_t prop_c =
 105         xcb_get_property_unchecked(globalconf.connection, false, win,
 106                                    _NET_WM_WINDOW_OPACITY, CARDINAL, 0L, 1L);
 107
 108     xcb_get_property_reply_t *prop_r =
 109         xcb_get_property_reply(globalconf.connection, prop_c, NULL);
 110
 111     ret = window_opacity_get_from_reply(prop_r);
 112     p_delete(&prop_r);
 113     return ret;
 114 }
 115
 116 /** Get the opacity of a window.
 117  * \param prop_r A reply to a get property request for _NET_WM_WINDOW_OPACITY.
 118  * \return The opacity, between 0 and 1.
 119  */
 120 double window_opacity_get_from_reply(xcb_get_property_reply_t *prop_r)
 121 {
 122     if(prop_r && prop_r->value_len && prop_r->format == 32)
 123     {
 124         uint32_t value = *(uint32_t *) xcb_get_property_value(prop_r);
 125         return (double) value / (double) 0xffffffff;
 126     }
 127
 128     return -1;
 129 }
 130
 131 /** Set opacity of a window.
 132  * \param win The window.
 133  * \param opacity Opacity of the window, between 0 and 1.
 134  */
 135 void
 136 window_opacity_set(xcb_window_t win, double opacity)
 137 {
 138     if(opacity >= 0 && opacity <= 1)
 139     {
 140         uint32_t real_opacity = opacity * 0xffffffff;
 141         xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
 142                             _NET_WM_WINDOW_OPACITY, CARDINAL, 32, 1L, &real_opacity);
 143     }
 144     else
 145         xcb_delete_property(globalconf.connection, win, _NET_WM_WINDOW_OPACITY);
 146 }
 147
 148 /** Send WM_TAKE_FOCUS client message to window
 149  * \param win destination window
 150  */
 151 void
 152 window_takefocus(xcb_window_t win)
 153 {
 154     xcb_client_message_event_t ev;
 155
 156     /* Initialize all of event's fields first */
 157     p_clear(&ev, 1);
 158
 159     ev.response_type = XCB_CLIENT_MESSAGE;
 160     ev.window = win;
 161     ev.format = 32;
 162     ev.data.data32[1] = XCB_CURRENT_TIME;
 163     ev.type = WM_PROTOCOLS;
 164     ev.data.data32[0] = WM_TAKE_FOCUS;
 165
 166     xcb_send_event(globalconf.connection, false, win,
 167                    XCB_EVENT_MASK_NO_EVENT, (char *) &ev);
 168 }
 169
 170 /** Set wibox cursor.
 171  * \param w The wibox.
 172  * \param c The cursor.
 173  */
 174 void
 175 window_set_cursor(xcb_window_t w, xcb_cursor_t c)
 176 {
 177     xcb_change_window_attributes(globalconf.connection, w, XCB_CW_CURSOR,
 178                                  (const uint32_t[]) { c });
 179 }
 180
 181 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80