1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gtk/nsScreenGtk.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,156 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsScreenGtk.h"
1.10 +
1.11 +#include <gdk/gdk.h>
1.12 +#ifdef MOZ_X11
1.13 +#include <gdk/gdkx.h>
1.14 +#include <X11/Xatom.h>
1.15 +#endif
1.16 +#include <gtk/gtk.h>
1.17 +
1.18 +nsScreenGtk :: nsScreenGtk ( )
1.19 + : mScreenNum(0),
1.20 + mRect(0, 0, 0, 0),
1.21 + mAvailRect(0, 0, 0, 0)
1.22 +{
1.23 +}
1.24 +
1.25 +
1.26 +nsScreenGtk :: ~nsScreenGtk()
1.27 +{
1.28 +}
1.29 +
1.30 +
1.31 +NS_IMETHODIMP
1.32 +nsScreenGtk :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
1.33 +{
1.34 + *outLeft = mRect.x;
1.35 + *outTop = mRect.y;
1.36 + *outWidth = mRect.width;
1.37 + *outHeight = mRect.height;
1.38 +
1.39 + return NS_OK;
1.40 +
1.41 +} // GetRect
1.42 +
1.43 +
1.44 +NS_IMETHODIMP
1.45 +nsScreenGtk :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
1.46 +{
1.47 + *outLeft = mAvailRect.x;
1.48 + *outTop = mAvailRect.y;
1.49 + *outWidth = mAvailRect.width;
1.50 + *outHeight = mAvailRect.height;
1.51 +
1.52 + return NS_OK;
1.53 +
1.54 +} // GetAvailRect
1.55 +
1.56 +
1.57 +NS_IMETHODIMP
1.58 +nsScreenGtk :: GetPixelDepth(int32_t *aPixelDepth)
1.59 +{
1.60 + GdkVisual * visual = gdk_screen_get_system_visual(gdk_screen_get_default());
1.61 + *aPixelDepth = gdk_visual_get_depth(visual);
1.62 +
1.63 + return NS_OK;
1.64 +
1.65 +} // GetPixelDepth
1.66 +
1.67 +
1.68 +NS_IMETHODIMP
1.69 +nsScreenGtk :: GetColorDepth(int32_t *aColorDepth)
1.70 +{
1.71 + return GetPixelDepth ( aColorDepth );
1.72 +
1.73 +} // GetColorDepth
1.74 +
1.75 +
1.76 +void
1.77 +nsScreenGtk :: Init (GdkWindow *aRootWindow)
1.78 +{
1.79 + // We listen for configure events on the root window to pick up
1.80 + // changes to this rect. We could listen for "size_changed" signals
1.81 + // on the default screen to do this, except that doesn't work with
1.82 + // versions of GDK predating the GdkScreen object. See bug 256646.
1.83 + mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height());
1.84 +
1.85 +#ifdef MOZ_X11
1.86 + // We need to account for the taskbar, etc in the available rect.
1.87 + // See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
1.88 +
1.89 + // XXX do we care about _NET_WM_STRUT_PARTIAL? That will
1.90 + // add much more complexity to the code here (our screen
1.91 + // could have a non-rectangular shape), but should
1.92 + // lead to greater accuracy.
1.93 +
1.94 + long *workareas;
1.95 + GdkAtom type_returned;
1.96 + int format_returned;
1.97 + int length_returned;
1.98 +
1.99 + GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
1.100 +
1.101 + gdk_error_trap_push();
1.102 +
1.103 + // gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here.
1.104 + if (!gdk_property_get(aRootWindow,
1.105 + gdk_atom_intern ("_NET_WORKAREA", FALSE),
1.106 + cardinal_atom,
1.107 + 0, G_MAXLONG - 3, FALSE,
1.108 + &type_returned,
1.109 + &format_returned,
1.110 + &length_returned,
1.111 + (guchar **) &workareas)) {
1.112 + // This window manager doesn't support the freedesktop standard.
1.113 + // Nothing we can do about it, so assume full screen size.
1.114 + return;
1.115 + }
1.116 +
1.117 + // Flush the X queue to catch errors now.
1.118 + gdk_flush();
1.119 +
1.120 + if (!gdk_error_trap_pop() &&
1.121 + type_returned == cardinal_atom &&
1.122 + length_returned && (length_returned % 4) == 0 &&
1.123 + format_returned == 32) {
1.124 + int num_items = length_returned / sizeof(long);
1.125 +
1.126 + for (int i = 0; i < num_items; i += 4) {
1.127 + nsIntRect workarea(workareas[i], workareas[i + 1],
1.128 + workareas[i + 2], workareas[i + 3]);
1.129 + if (!mRect.Contains(workarea)) {
1.130 + // Note that we hit this when processing screen size changes,
1.131 + // since we'll get the configure event before the toolbars have
1.132 + // been moved. We'll end up cleaning this up when we get the
1.133 + // change notification to the _NET_WORKAREA property. However,
1.134 + // we still want to listen to both, so we'll handle changes
1.135 + // properly for desktop environments that don't set the
1.136 + // _NET_WORKAREA property.
1.137 + NS_WARNING("Invalid bounds");
1.138 + continue;
1.139 + }
1.140 +
1.141 + mAvailRect.IntersectRect(mAvailRect, workarea);
1.142 + }
1.143 + }
1.144 + g_free (workareas);
1.145 +#endif
1.146 +}
1.147 +
1.148 +#ifdef MOZ_X11
1.149 +void
1.150 +nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo)
1.151 +{
1.152 + nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org,
1.153 + aScreenInfo->width, aScreenInfo->height);
1.154 +
1.155 + mScreenNum = aScreenInfo->screen_number;
1.156 +
1.157 + mAvailRect = mRect = xineRect;
1.158 +}
1.159 +#endif
