xwindow.c

   1 /*
   2  * xwindow.c - X window handling functions
   3  *
   4  * Copyright © 2007-2009 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 "xwindow.h"
  26 #include "objects/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 xwindow_set_state(xcb_window_t win, uint32_t state)
  38 {
  39     uint32_t 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 xwindow_get_state_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 xwindow_get_state_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_ICCCM_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 xwindow_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 xwindow_buttons_grab(xcb_window_t win, button_array_t *buttons)
 106 {
 107     if(win == XCB_NONE)
 108         return;
 109
 110     /* Ungrab everything first */
 111     xcb_ungrab_button(globalconf.connection, XCB_BUTTON_INDEX_ANY, win, XCB_BUTTON_MASK_ANY);
 112
 113     foreach(b, *buttons)
 114         xcb_grab_button(globalconf.connection, false, win, BUTTONMASK,
 115                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE,
 116                         (*b)->button, (*b)->modifiers);
 117 }
 118
 119 /** Grab key on a window.
 120  * \param win The window.
 121  * \param k The key.
 122  */
 123 static void
 124 xwindow_grabkey(xcb_window_t win, keyb_t *k)
 125 {
 126     if(k->keycode)
 127         xcb_grab_key(globalconf.connection, true, win,
 128                      k->modifiers, k->keycode, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
 129     else if(k->keysym)
 130     {
 131         xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(globalconf.keysyms, k->keysym);
 132         if(keycodes)
 133         {
 134             for(xcb_keycode_t *kc = keycodes; *kc; kc++)
 135                 xcb_grab_key(globalconf.connection, true, win,
 136                              k->modifiers, *kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
 137             p_delete(&keycodes);
 138         }
 139     }
 140 }
 141
 142 void
 143 xwindow_grabkeys(xcb_window_t win, key_array_t *keys)
 144 {
 145     /* Ungrab everything first */
 146     xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, win, XCB_BUTTON_MASK_ANY);
 147
 148     foreach(k, *keys)
 149         xwindow_grabkey(win, *k);
 150 }
 151
 152 /** Send a request for a window's opacity.
 153  * \param win The window
 154  * \return A cookie for xwindow_get_opacity_from_reply().
 155  */
 156 xcb_get_property_cookie_t xwindow_get_opacity_unchecked(xcb_window_t win)
 157 {
 158     return xcb_get_property_unchecked(globalconf.connection, false, win,
 159                                       _NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 0L, 1L);
 160 }
 161
 162 /** Get the opacity of a window.
 163  * \param win The window.
 164  * \return The opacity, between 0 and 1 or -1 or no opacity set.
 165  */
 166 double
 167 xwindow_get_opacity(xcb_window_t win)
 168 {
 169     xcb_get_property_cookie_t prop_c =
 170         xwindow_get_opacity_unchecked(win);
 171     return xwindow_get_opacity_from_cookie(prop_c);
 172 }
 173
 174 /** Get the opacity of a window.
 175  * \param cookie A cookie for a reply to a get property request for _NET_WM_WINDOW_OPACITY.
 176  * \return The opacity, between 0 and 1.
 177  */
 178 double
 179 xwindow_get_opacity_from_cookie(xcb_get_property_cookie_t cookie)
 180 {
 181     xcb_get_property_reply_t *prop_r =
 182         xcb_get_property_reply(globalconf.connection, cookie, NULL);
 183
 184     if(prop_r && prop_r->value_len && prop_r->format == 32)
 185     {
 186         uint32_t value = *(uint32_t *) xcb_get_property_value(prop_r);
 187         p_delete(&prop_r);
 188         return (double) value / (double) 0xffffffff;
 189     }
 190     p_delete(&prop_r);
 191
 192     return -1;
 193 }
 194
 195 /** Set opacity of a window.
 196  * \param win The window.
 197  * \param opacity Opacity of the window, between 0 and 1.
 198  */
 199 void
 200 xwindow_set_opacity(xcb_window_t win, double opacity)
 201 {
 202     if(win)
 203     {
 204         if(opacity >= 0 && opacity <= 1)
 205         {
 206             uint32_t real_opacity = opacity * 0xffffffff;
 207             xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
 208                                 _NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 32, 1L, &real_opacity);
 209         }
 210         else
 211             xcb_delete_property(globalconf.connection, win, _NET_WM_WINDOW_OPACITY);
 212     }
 213 }
 214
 215 /** Send WM_TAKE_FOCUS client message to window
 216  * \param win destination window
 217  */
 218 void
 219 xwindow_takefocus(xcb_window_t win)
 220 {
 221     xcb_client_message_event_t ev;
 222
 223     /* Initialize all of event's fields first */
 224     p_clear(&ev, 1);
 225
 226     ev.response_type = XCB_CLIENT_MESSAGE;
 227     ev.window = win;
 228     ev.format = 32;
 229     ev.data.data32[1] = globalconf.timestamp;
 230     ev.type = WM_PROTOCOLS;
 231     ev.data.data32[0] = WM_TAKE_FOCUS;
 232
 233     xcb_send_event(globalconf.connection, false, win,
 234                    XCB_EVENT_MASK_NO_EVENT, (char *) &ev);
 235 }
 236
 237 /** Set window cursor.
 238  * \param w The window.
 239  * \param c The cursor.
 240  */
 241 void
 242 xwindow_set_cursor(xcb_window_t w, xcb_cursor_t c)
 243 {
 244     xcb_change_window_attributes(globalconf.connection, w, XCB_CW_CURSOR,
 245                                  (const uint32_t[]) { c });
 246 }
 247
 248 /** Set a window border color.
 249  * \param w The window.
 250  * \param color The color.
 251  */
 252 void
 253 xwindow_set_border_color(xcb_window_t w, color_t *color)
 254 {
 255     if(w)
 256         xcb_change_window_attributes(globalconf.connection, w, XCB_CW_BORDER_PIXEL, &color->pixel);
 257 }
 258
 259 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80