pjs/widget/gtk2/nsScreenGtk.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Christopher A. Aillon <caillon@redhat.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
#include "nsScreenGtk.h"
#include <gdk/gdk.h>
#ifdef MOZ_X11
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#endif
#include <gtk/gtk.h>
nsScreenGtk :: nsScreenGtk ( )
: mScreenNum(0),
mRect(0, 0, 0, 0),
mAvailRect(0, 0, 0, 0)
{
}
nsScreenGtk :: ~nsScreenGtk()
{
}
NS_IMETHODIMP
nsScreenGtk :: GetRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
{
*outLeft = mRect.x;
*outTop = mRect.y;
*outWidth = mRect.width;
*outHeight = mRect.height;
return NS_OK;
} // GetRect
NS_IMETHODIMP
nsScreenGtk :: GetAvailRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
{
*outLeft = mAvailRect.x;
*outTop = mAvailRect.y;
*outWidth = mAvailRect.width;
*outHeight = mAvailRect.height;
return NS_OK;
} // GetAvailRect
NS_IMETHODIMP
nsScreenGtk :: GetPixelDepth(PRInt32 *aPixelDepth)
{
GdkVisual * rgb_visual = gdk_rgb_get_visual();
*aPixelDepth = rgb_visual->depth;
return NS_OK;
} // GetPixelDepth
NS_IMETHODIMP
nsScreenGtk :: GetColorDepth(PRInt32 *aColorDepth)
{
return GetPixelDepth ( aColorDepth );
} // GetColorDepth
void
nsScreenGtk :: Init (GdkWindow *aRootWindow)
{
// We listen for configure events on the root window to pick up
// changes to this rect. We could listen for "size_changed" signals
// on the default screen to do this, except that doesn't work with
// versions of GDK predating the GdkScreen object. See bug 256646.
mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height());
#ifdef MOZ_X11
// We need to account for the taskbar, etc in the available rect.
// See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
// XXX do we care about _NET_WM_STRUT_PARTIAL? That will
// add much more complexity to the code here (our screen
// could have a non-rectangular shape), but should
// lead to greater accuracy.
long *workareas;
GdkAtom type_returned;
int format_returned;
int length_returned;
#if GTK_CHECK_VERSION(2,0,0)
GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
#else
GdkAtom cardinal_atom = (GdkAtom) XA_CARDINAL;
#endif
gdk_error_trap_push();
// gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here.
if (!gdk_property_get(aRootWindow,
gdk_atom_intern ("_NET_WORKAREA", FALSE),
cardinal_atom,
0, G_MAXLONG - 3, FALSE,
&type_returned,
&format_returned,
&length_returned,
(guchar **) &workareas)) {
// This window manager doesn't support the freedesktop standard.
// Nothing we can do about it, so assume full screen size.
return;
}
// Flush the X queue to catch errors now.
gdk_flush();
if (!gdk_error_trap_pop() &&
type_returned == cardinal_atom &&
length_returned && (length_returned % 4) == 0 &&
format_returned == 32) {
int num_items = length_returned / sizeof(long);
for (int i = 0; i < num_items; i += 4) {
nsIntRect workarea(workareas[i], workareas[i + 1],
workareas[i + 2], workareas[i + 3]);
if (!mRect.Contains(workarea)) {
// Note that we hit this when processing screen size changes,
// since we'll get the configure event before the toolbars have
// been moved. We'll end up cleaning this up when we get the
// change notification to the _NET_WORKAREA property. However,
// we still want to listen to both, so we'll handle changes
// properly for desktop environments that don't set the
// _NET_WORKAREA property.
NS_WARNING("Invalid bounds");
continue;
}
mAvailRect.IntersectRect(mAvailRect, workarea);
}
}
g_free (workareas);
#endif
}
#ifdef MOZ_X11
void
nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo)
{
nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org,
aScreenInfo->width, aScreenInfo->height);
mScreenNum = aScreenInfo->screen_number;
mAvailRect = mRect = xineRect;
}
#endif