1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 2000
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Christopher A. Aillon <caillon@redhat.com>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsScreenGtk.h"
40 :
41 : #include <gdk/gdk.h>
42 : #ifdef MOZ_X11
43 : #include <gdk/gdkx.h>
44 : #include <X11/Xatom.h>
45 : #endif
46 : #include <gtk/gtk.h>
47 :
48 0 : nsScreenGtk :: nsScreenGtk ( )
49 : : mScreenNum(0),
50 : mRect(0, 0, 0, 0),
51 0 : mAvailRect(0, 0, 0, 0)
52 : {
53 0 : }
54 :
55 :
56 0 : nsScreenGtk :: ~nsScreenGtk()
57 : {
58 0 : }
59 :
60 :
61 : NS_IMETHODIMP
62 0 : nsScreenGtk :: GetRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
63 : {
64 0 : *outLeft = mRect.x;
65 0 : *outTop = mRect.y;
66 0 : *outWidth = mRect.width;
67 0 : *outHeight = mRect.height;
68 :
69 0 : return NS_OK;
70 :
71 : } // GetRect
72 :
73 :
74 : NS_IMETHODIMP
75 0 : nsScreenGtk :: GetAvailRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
76 : {
77 0 : *outLeft = mAvailRect.x;
78 0 : *outTop = mAvailRect.y;
79 0 : *outWidth = mAvailRect.width;
80 0 : *outHeight = mAvailRect.height;
81 :
82 0 : return NS_OK;
83 :
84 : } // GetAvailRect
85 :
86 :
87 : NS_IMETHODIMP
88 0 : nsScreenGtk :: GetPixelDepth(PRInt32 *aPixelDepth)
89 : {
90 0 : GdkVisual * rgb_visual = gdk_rgb_get_visual();
91 0 : *aPixelDepth = rgb_visual->depth;
92 :
93 0 : return NS_OK;
94 :
95 : } // GetPixelDepth
96 :
97 :
98 : NS_IMETHODIMP
99 0 : nsScreenGtk :: GetColorDepth(PRInt32 *aColorDepth)
100 : {
101 0 : return GetPixelDepth ( aColorDepth );
102 :
103 : } // GetColorDepth
104 :
105 :
106 : void
107 0 : nsScreenGtk :: Init (GdkWindow *aRootWindow)
108 : {
109 : // We listen for configure events on the root window to pick up
110 : // changes to this rect. We could listen for "size_changed" signals
111 : // on the default screen to do this, except that doesn't work with
112 : // versions of GDK predating the GdkScreen object. See bug 256646.
113 0 : mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height());
114 :
115 : #ifdef MOZ_X11
116 : // We need to account for the taskbar, etc in the available rect.
117 : // See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
118 :
119 : // XXX do we care about _NET_WM_STRUT_PARTIAL? That will
120 : // add much more complexity to the code here (our screen
121 : // could have a non-rectangular shape), but should
122 : // lead to greater accuracy.
123 :
124 : long *workareas;
125 : GdkAtom type_returned;
126 : int format_returned;
127 : int length_returned;
128 :
129 : #if GTK_CHECK_VERSION(2,0,0)
130 0 : GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
131 : #else
132 : GdkAtom cardinal_atom = (GdkAtom) XA_CARDINAL;
133 : #endif
134 :
135 0 : gdk_error_trap_push();
136 :
137 : // gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here.
138 0 : if (!gdk_property_get(aRootWindow,
139 : gdk_atom_intern ("_NET_WORKAREA", FALSE),
140 : cardinal_atom,
141 : 0, G_MAXLONG - 3, FALSE,
142 : &type_returned,
143 : &format_returned,
144 : &length_returned,
145 0 : (guchar **) &workareas)) {
146 : // This window manager doesn't support the freedesktop standard.
147 : // Nothing we can do about it, so assume full screen size.
148 0 : return;
149 : }
150 :
151 : // Flush the X queue to catch errors now.
152 0 : gdk_flush();
153 :
154 0 : if (!gdk_error_trap_pop() &&
155 : type_returned == cardinal_atom &&
156 : length_returned && (length_returned % 4) == 0 &&
157 : format_returned == 32) {
158 0 : int num_items = length_returned / sizeof(long);
159 :
160 0 : for (int i = 0; i < num_items; i += 4) {
161 0 : nsIntRect workarea(workareas[i], workareas[i + 1],
162 0 : workareas[i + 2], workareas[i + 3]);
163 0 : if (!mRect.Contains(workarea)) {
164 : // Note that we hit this when processing screen size changes,
165 : // since we'll get the configure event before the toolbars have
166 : // been moved. We'll end up cleaning this up when we get the
167 : // change notification to the _NET_WORKAREA property. However,
168 : // we still want to listen to both, so we'll handle changes
169 : // properly for desktop environments that don't set the
170 : // _NET_WORKAREA property.
171 0 : NS_WARNING("Invalid bounds");
172 0 : continue;
173 : }
174 :
175 0 : mAvailRect.IntersectRect(mAvailRect, workarea);
176 : }
177 : }
178 0 : g_free (workareas);
179 : #endif
180 : }
181 :
182 : #ifdef MOZ_X11
183 : void
184 0 : nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo)
185 : {
186 : nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org,
187 0 : aScreenInfo->width, aScreenInfo->height);
188 :
189 0 : mScreenNum = aScreenInfo->screen_number;
190 :
191 0 : mAvailRect = mRect = xineRect;
192 0 : }
193 : #endif
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