255 lines
6.9 KiB
C
255 lines
6.9 KiB
C
/* $Id$ */
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/* Copyright (c) 2011-2016 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Desktop libDesktop */
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/* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* TODO:
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* - proxy for the libApp framework instead */
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#include <stdlib.h>
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#ifdef DEBUG
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# include <stdio.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <gtk/gtk.h>
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#if GTK_CHECK_VERSION(3, 0, 0)
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# include <gtk/gtkx.h>
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#else
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# include <gdk/gdkx.h>
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#endif
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#include <System.h>
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#include "Desktop.h"
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/* Message */
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/* private */
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/* types */
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typedef struct _MessageCallback
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{
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GtkWidget * window;
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#if GTK_CHECK_VERSION(3, 0, 0)
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Atom atom;
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#else
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GtkWidget * widget;
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Window xwindow;
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#endif
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DesktopMessageCallback callback;
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void * data;
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} MessageCallback;
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/* variables */
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static MessageCallback ** _callbacks = NULL;
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static size_t _callbacks_cnt = 0;
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/* prototypes */
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/* callbacks */
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static GdkFilterReturn _desktop_message_on_callback(GdkXEvent * xevent,
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GdkEvent * event, gpointer data);
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/* public */
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/* functions */
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/* desktop_message_register */
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int desktop_message_register(GtkWidget * window, char const * destination,
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DesktopMessageCallback callback, void * data)
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{
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MessageCallback ** p;
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MessageCallback * mc;
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GdkWindow * gwindow;
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#if !GTK_CHECK_VERSION(3, 0, 0)
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GdkAtom atom;
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#endif
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s(%p, \"%s\", %p, %p)\n", __func__, window,
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destination, callback, data);
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#endif
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if((p = realloc(_callbacks, sizeof(*p) * (_callbacks_cnt + 1))) == NULL)
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return -1;
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_callbacks = p;
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if((mc = object_new(sizeof(*mc))) == NULL)
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return -1;
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_callbacks[_callbacks_cnt++] = mc;
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mc->callback = callback;
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mc->data = data;
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#if GTK_CHECK_VERSION(3, 0, 0)
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mc->atom = XInternAtom(gdk_x11_get_default_xdisplay(), destination,
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FALSE);
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gwindow = (window != NULL) ? gtk_widget_get_window(window) : NULL;
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gdk_window_add_filter(gwindow, _desktop_message_on_callback, mc);
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#else
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if((mc->window = window) == NULL)
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{
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mc->widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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gtk_widget_realize(mc->widget);
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}
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else
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mc->widget = window;
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gwindow = gtk_widget_get_window(mc->widget);
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mc->xwindow = GDK_WINDOW_XWINDOW(gwindow);
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atom = gdk_atom_intern(destination, FALSE);
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gdk_add_client_message_filter(atom, _desktop_message_on_callback, mc);
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#endif
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return 0;
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}
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/* desktop_message_send */
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int desktop_message_send(char const * destination, uint32_t value1,
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uint32_t value2, uint32_t value3)
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{
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#if GTK_CHECK_VERSION(3, 0, 0)
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XEvent xev;
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XClientMessageEvent * xcme = &xev.xclient;
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memset(&xev, 0, sizeof(xev));
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xev.type = ClientMessage;
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xcme->serial = 0;
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xcme->send_event = True;
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xcme->message_type = XInternAtom(gdk_x11_get_default_xdisplay(),
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destination, FALSE);
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xcme->format = 32;
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xcme->data.l[0] = value1;
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xcme->data.l[1] = value2;
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xcme->data.l[2] = value3;
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gdk_error_trap_push();
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XSendEvent(gdk_x11_get_default_xdisplay(),
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gdk_x11_get_default_root_xwindow(), False,
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StructureNotifyMask | /* FIXME check the mask */
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SubstructureNotifyMask | SubstructureRedirectMask,
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&xev);
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return (gdk_error_trap_pop() == 0) ? 0 : -1;
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#else
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GdkAtom atom;
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GdkEvent event;
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GdkEventClient * client = &event.client;
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atom = gdk_atom_intern(destination, FALSE);
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memset(&event, 0, sizeof(event));
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client->type = GDK_CLIENT_EVENT;
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client->window = NULL;
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client->send_event = TRUE;
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client->message_type = atom;
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client->data_format = 32;
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client->data.l[0] = value1;
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client->data.l[1] = value2;
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client->data.l[2] = value3;
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gdk_event_send_clientmessage_toall(&event);
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return 0;
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#endif
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}
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/* desktop_message_unregister */
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void desktop_message_unregister(GtkWidget * window,
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DesktopMessageCallback callback, void * data)
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{
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size_t i;
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MessageCallback ** p;
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MessageCallback * mc;
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GdkWindow * w;
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# ifdef DEBUG
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fprintf(stderr, "DEBUG: %s(%p, %p)\n", __func__, callback, data);
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# endif
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for(i = 0; i < _callbacks_cnt; i++)
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{
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mc = _callbacks[i];
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if(mc->window == window
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&& mc->callback == callback
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&& mc->data == data)
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break;
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}
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if(i == _callbacks_cnt)
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return;
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#if GTK_CHECK_VERSION(3, 0, 0)
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w = (window != NULL) ? gtk_widget_get_window(window) : NULL;
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#else
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w = gtk_widget_get_window(mc->widget);
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#endif
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gdk_window_remove_filter(w, _desktop_message_on_callback, mc);
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#if !GTK_CHECK_VERSION(3, 0, 0)
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if(mc->window == NULL)
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gtk_widget_destroy(mc->widget);
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#endif
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object_delete(mc);
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p = &_callbacks[i];
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memmove(p, p + 1, sizeof(*p) * (_callbacks_cnt - i - 1));
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if((p = realloc(_callbacks, sizeof(*p) * (--_callbacks_cnt))) != NULL
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|| _callbacks_cnt == 0)
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_callbacks = p;
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}
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/* private */
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/* callbacks */
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/* desktop_message_on_callback */
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static GdkFilterReturn _desktop_message_on_callback(GdkXEvent * xevent,
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GdkEvent * event, gpointer data)
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{
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MessageCallback * mc = data;
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XEvent * xev = xevent;
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XClientMessageEvent * xcme;
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uint32_t value1;
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uint32_t value2;
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uint32_t value3;
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(void) event;
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if(xev->type != ClientMessage)
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return GDK_FILTER_CONTINUE;
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xcme = &xev->xclient;
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#if GTK_CHECK_VERSION(3, 0, 0)
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# ifdef DEBUG
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fprintf(stderr, "DEBUG: %s(%lu %lu %p)\n", __func__, xcme->serial,
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xcme->window, (void *)mc);
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# endif
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if(mc->atom != xcme->message_type)
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return GDK_FILTER_CONTINUE;
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#else
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# ifdef DEBUG
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fprintf(stderr, "DEBUG: %s(%lu %lu %p) %lu\n", __func__, xcme->serial,
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xcme->window, mc, (void *)mc->xwindow);
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# endif
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if(mc->xwindow != xcme->window)
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return GDK_FILTER_CONTINUE;
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#endif
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() %p(%p)\n", __func__, (void *)mc->callback,
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(void *)mc->data);
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#endif
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value1 = xcme->data.l[0];
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value2 = xcme->data.l[1];
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value3 = xcme->data.l[2];
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if(mc->callback(mc->data, value1, value2, value3) == 0)
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return GDK_FILTER_CONTINUE;
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desktop_message_unregister(mc->window, mc->callback, mc->data);
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return GDK_FILTER_REMOVE;
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}
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