button.c

   1 /*
   2  * button.c
   3  *
   4  * Part of gwm, the Gratuitous Window Manager,
   5  *     by Gary Wong, <gtw@gnu.org>.
   6  *
   7  * Copyright (C) 2009  Gary Wong
   8  *
   9  *  This program is free software: you can redistribute it and/or modify
  10  *  it under the terms of version 3 of the GNU General Public License as
  11  *  published by the Free Software Foundation.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  * $Id$
  22  */
  23
  24 #include <config.h>
  25
  26 #include <xcb/xcb.h>
  27
  28 #include "gwm.h"
  29
  30 #include "button.h"
  31 #include "window-table.h"
  32
  33 static int button_active;
  34
  35 static void set_button_active( struct gwm_window *window, int new ) {
  36
  37     uint32_t n;
  38
  39     if( new == button_active )
  40         return;
  41
  42     n = gwm_screens[ window->screen ].pixels[ ( button_active = new ) ?
  43                                               COL_BUTTON_ACTIVE :
  44                                               COL_BUTTON_INACTIVE ];
  45     xcb_change_window_attributes( c, window->w, XCB_CW_BACK_PIXEL, &n );
  46
  47     queue_window_update( window, 0, 0, FRAME_BUTTON_SIZE, FRAME_BUTTON_SIZE,
  48                          FALSE );
  49 }
  50
  51 static void button_button_press( struct gwm_window *window,
  52                                  xcb_button_press_event_t *ev ) {
  53
  54     if( initial_press( ev ) )
  55         /* No buttons were pressed; grab initiates. */
  56         set_button_active( window, TRUE );
  57
  58     if( ev->detail == 3 && ( window->u.button.frame->u.frame.child->
  59                              u.managed.protocols & PROTOCOL_DELETE_WINDOW ) )
  60         /* Button 3 will kill the client, even if it supports WM_DELETE_WINDOW.
  61            Change to CURSOR_DESTROY to indicate the distinction. */
  62         xcb_change_active_pointer_grab( c, cursors[ CURSOR_DESTROY ],
  63                                         ev->time, XCB_EVENT_MASK_BUTTON_PRESS |
  64                                         XCB_EVENT_MASK_BUTTON_RELEASE |
  65                                         XCB_EVENT_MASK_ENTER_WINDOW |
  66                                         XCB_EVENT_MASK_LEAVE_WINDOW );
  67 }
  68
  69 static void button_button_release( struct gwm_window *window,
  70                                    xcb_button_release_event_t *ev ) {
  71
  72     if( final_release( ev ) ) {
  73         /* Final button released; grab terminates. */
  74         if( button_active ) {
  75             if( ev->detail == 3 || !( window->u.button.frame->u.frame.child->
  76                                       u.managed.protocols &
  77                                       PROTOCOL_DELETE_WINDOW ) )
  78                 xcb_kill_client( c, window->u.button.frame->u.frame.child->w );
  79             else {
  80                 xcb_client_message_event_t msg;
  81                 struct gwm_window *frame = window->u.button.frame;
  82
  83                 msg.response_type = XCB_CLIENT_MESSAGE;
  84                 msg.format = 32;
  85                 msg.sequence = 0;
  86                 msg.window = frame->u.frame.child->w;
  87                 msg.type = atoms[ ATOM_WM_PROTOCOLS ];
  88                 msg.data.data32[ 0 ] = atoms[ ATOM_WM_DELETE_WINDOW ];
  89                 msg.data.data32[ 1 ] = ev->time;
  90                 msg.data.data32[ 2 ] = 0;
  91                 msg.data.data32[ 3 ] = 0;
  92                 msg.data.data32[ 4 ] = 0;
  93
  94                 xcb_send_event( c, FALSE, frame->u.frame.child->w, 0,
  95                                 (char *) &msg );
  96             }
  97
  98             set_button_active( window, FALSE );
  99         }
 100     } else if( ev->detail == 3 && ( window->u.button.frame->u.frame.child->
 101                                     u.managed.protocols &
 102                                     PROTOCOL_DELETE_WINDOW ) )
 103         /* Button 3 released; we'll no longer kill the client.  Remove
 104            the temporary CURSOR_DESTROY. */
 105         xcb_change_active_pointer_grab( c, XCB_NONE, ev->time,
 106                                         XCB_EVENT_MASK_BUTTON_PRESS |
 107                                         XCB_EVENT_MASK_BUTTON_RELEASE |
 108                                         XCB_EVENT_MASK_ENTER_WINDOW |
 109                                         XCB_EVENT_MASK_LEAVE_WINDOW );
 110 }
 111
 112 static void button_enter_notify( struct gwm_window *window,
 113                                  xcb_enter_notify_event_t *ev ) {
 114
 115     set_button_active( window, TRUE );
 116 }
 117
 118 static void button_leave_notify( struct gwm_window *window,
 119                                  xcb_leave_notify_event_t *ev ) {
 120
 121     set_button_active( window, FALSE );
 122 }
 123
 124 event_handler button_handlers[] = {
 125     NULL, /* Error */
 126     NULL, /* Reply */
 127     NULL, /* KeyPress */
 128     NULL, /* KeyRelease */
 129     (event_handler) button_button_press,
 130     (event_handler) button_button_release,
 131     NULL, /* MotionNotify */
 132     (event_handler) button_enter_notify,
 133     (event_handler) button_leave_notify,
 134     NULL, /* FocusIn */
 135     NULL, /* FocusOut */
 136     NULL, /* KeymapNotify */
 137     NULL, /* Expose */
 138     NULL, /* GraphicsExpose */
 139     NULL, /* NoExposure */
 140     NULL, /* VisibilityNotify */
 141     NULL, /* CreateNotify */
 142     NULL, /* DestroyNotify */
 143     NULL, /* UnmapNotify */
 144     NULL, /* MapNotify */
 145     NULL, /* MapRequest */
 146     NULL, /* ReparentNotify */
 147     NULL, /* ConfigureNotify */
 148     NULL, /* ConfigureRequest */
 149     NULL, /* GravityNotify */
 150     NULL, /* ResizeRequest */
 151     NULL, /* CirculateNotify */
 152     NULL, /* CirculateRequest */
 153     NULL, /* PropertyNotify */
 154     NULL, /* SelectionClear */
 155     NULL, /* SelectionRequest */
 156     NULL, /* SelectionNotify */
 157     NULL, /* ColormapNotify */
 158     NULL, /* ClientMessage */
 159     NULL, /* MappingNotify */
 160     NULL /* (synthetic) */
 161 };