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 "button.h"
  27 #include "common/atoms.h"
  28
  29 /** Mask shorthands */
  30 #define BUTTONMASK     (XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE)
  31
  32 /** Set client state (WM_STATE) property.
  33  * \param win The window to set state.
  34  * \param state The state to set.
  35  */
  36 void
  37 window_state_set(xcb_window_t win, long state)
  38 {
  39     long data[] = { state, XCB_NONE };
  40     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
  41                         WM_STATE, WM_STATE, 32, 2, data);
  42 }
  43
  44 /** Send request to get a window state (WM_STATE).
  45  * \param w A client window.
  46  * \return The cookie associated with the request.
  47  */
  48 xcb_get_property_cookie_t
  49 window_state_get_unchecked(xcb_window_t w)
  50 {
  51     return xcb_get_property_unchecked(globalconf.connection, false, w, WM_STATE,
  52                                       WM_STATE, 0L, 2L);
  53 }
  54
  55 /** Get a window state (WM_STATE).
  56  * \param cookie The cookie.
  57  * \return The current state of the window, or 0 on error.
  58  */
  59 uint32_t
  60 window_state_get_reply(xcb_get_property_cookie_t cookie)
  61 {
  62     /* If no property is set, we just assume a sane default. */
  63     uint32_t result = XCB_WM_STATE_NORMAL;
  64     xcb_get_property_reply_t *prop_r;
  65
  66     if((prop_r = xcb_get_property_reply(globalconf.connection, cookie, NULL)))
  67     {
  68         if(xcb_get_property_value_length(prop_r))
  69             result = *(uint32_t *) xcb_get_property_value(prop_r);
  70
  71         p_delete(&prop_r);
  72     }
  73
  74     return result;
  75 }
  76
  77 /** Configure a window with its new geometry and border size.
  78  * \param win The X window id to configure.
  79  * \param geometry The new window geometry.
  80  * \param border The new border size.
  81  */
  82 void
  83 window_configure(xcb_window_t win, area_t geometry, int border)
  84 {
  85     xcb_configure_notify_event_t ce;
  86
  87     ce.response_type = XCB_CONFIGURE_NOTIFY;
  88     ce.event = win;
  89     ce.window = win;
  90     ce.x = geometry.x;
  91     ce.y = geometry.y;
  92     ce.width = geometry.width;
  93     ce.height = geometry.height;
  94     ce.border_width = border;
  95     ce.above_sibling = XCB_NONE;
  96     ce.override_redirect = false;
  97     xcb_send_event(globalconf.connection, false, win, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *) &ce);
  98 }
  99
 100 /** Grab or ungrab buttons on a window.
 101  * \param win The window.
 102  * \param buttons The buttons to grab.
 103  */
 104 void
 105 window_buttons_grab(xcb_window_t win, button_array_t *buttons)
 106 {
 107     foreach(b, *buttons)
 108         xcb_grab_button(globalconf.connection, false, win, BUTTONMASK,
 109                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE,
 110                         (*b)->button, (*b)->modifiers);
 111 }
 112
 113 /** Grab key on a window.
 114  * \param win The window.
 115  * \param k The key.
 116  */
 117 static void
 118 window_grabkey(xcb_window_t win, keyb_t *k)
 119 {
 120     if(k->keycode)
 121         xcb_grab_key(globalconf.connection, true, win,
 122                      k->modifiers, k->keycode, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
 123     else if(k->keysym)
 124     {
 125         xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(globalconf.keysyms, k->keysym);
 126         if(keycodes)
 127         {
 128             for(xcb_keycode_t *kc = keycodes; *kc; kc++)
 129                 xcb_grab_key(globalconf.connection, true, win,
 130                              k->modifiers, *kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
 131             p_delete(&keycodes);
 132         }
 133     }
 134 }
 135
 136 void
 137 window_grabkeys(xcb_window_t win, key_array_t *keys)
 138 {
 139     foreach(k, *keys)
 140         window_grabkey(win, *k);
 141 }
 142
 143 /** Get the opacity of a window.
 144  * \param win The window.
 145  * \return The opacity, between 0 and 1 or -1 or no opacity set.
 146  */
 147 double
 148 window_opacity_get(xcb_window_t win)
 149 {
 150     double ret;
 151
 152     xcb_get_property_cookie_t prop_c =
 153         xcb_get_property_unchecked(globalconf.connection, false, win,
 154                                    _NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 0L, 1L);
 155
 156     xcb_get_property_reply_t *prop_r =
 157         xcb_get_property_reply(globalconf.connection, prop_c, NULL);
 158
 159     ret = window_opacity_get_from_reply(prop_r);
 160     p_delete(&prop_r);
 161     return ret;
 162 }
 163
 164 /** Get the opacity of a window.
 165  * \param prop_r A reply to a get property request for _NET_WM_WINDOW_OPACITY.
 166  * \return The opacity, between 0 and 1.
 167  */
 168 double window_opacity_get_from_reply(xcb_get_property_reply_t *prop_r)
 169 {
 170     if(prop_r && prop_r->value_len && prop_r->format == 32)
 171     {
 172         uint32_t value = *(uint32_t *) xcb_get_property_value(prop_r);
 173         return (double) value / (double) 0xffffffff;
 174     }
 175
 176     return -1;
 177 }
 178
 179 /** Set opacity of a window.
 180  * \param win The window.
 181  * \param opacity Opacity of the window, between 0 and 1.
 182  */
 183 void
 184 window_opacity_set(xcb_window_t win, double opacity)
 185 {
 186     if(opacity >= 0 && opacity <= 1)
 187     {
 188         uint32_t real_opacity = opacity * 0xffffffff;
 189         xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
 190                             _NET_WM_WINDOW_OPACITY, CARDINAL, 32, 1L, &real_opacity);
 191     }
 192     else
 193         xcb_delete_property(globalconf.connection, win, _NET_WM_WINDOW_OPACITY);
 194 }
 195
 196 /** Send WM_TAKE_FOCUS client message to window
 197  * \param win destination window
 198  */
 199 void
 200 window_takefocus(xcb_window_t win)
 201 {
 202     xcb_client_message_event_t ev;
 203
 204     /* Initialize all of event's fields first */
 205     p_clear(&ev, 1);
 206
 207     ev.response_type = XCB_CLIENT_MESSAGE;
 208     ev.window = win;
 209     ev.format = 32;
 210     ev.data.data32[1] = globalconf.timestamp;
 211     ev.type = WM_PROTOCOLS;
 212     ev.data.data32[0] = WM_TAKE_FOCUS;
 213
 214     xcb_send_event(globalconf.connection, false, win,
 215                    XCB_EVENT_MASK_NO_EVENT, (char *) &ev);
 216 }
 217
 218 /** Set wibox cursor.
 219  * \param w The wibox.
 220  * \param c The cursor.
 221  */
 222 void
 223 window_set_cursor(xcb_window_t w, xcb_cursor_t c)
 224 {
 225     xcb_change_window_attributes(globalconf.connection, w, XCB_CW_CURSOR,
 226                                  (const uint32_t[]) { c });
 227 }
 228
 229 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80