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comparison: widget/gtk/nsScreenGtk.cpp
widget/gtk/nsScreenGtk.cpp
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsScreenGtk.h" | |
| 7 | |
| 8 #include <gdk/gdk.h> | |
| 9 #ifdef MOZ_X11 | |
| 10 #include <gdk/gdkx.h> | |
| 11 #include <X11/Xatom.h> | |
| 12 #endif | |
| 13 #include <gtk/gtk.h> | |
| 14 | |
| 15 nsScreenGtk :: nsScreenGtk ( ) | |
| 16 : mScreenNum(0), | |
| 17 mRect(0, 0, 0, 0), | |
| 18 mAvailRect(0, 0, 0, 0) | |
| 19 { | |
| 20 } | |
| 21 | |
| 22 | |
| 23 nsScreenGtk :: ~nsScreenGtk() | |
| 24 { | |
| 25 } | |
| 26 | |
| 27 | |
| 28 NS_IMETHODIMP | |
| 29 nsScreenGtk :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight) | |
| 30 { | |
| 31 *outLeft = mRect.x; | |
| 32 *outTop = mRect.y; | |
| 33 *outWidth = mRect.width; | |
| 34 *outHeight = mRect.height; | |
| 35 | |
| 36 return NS_OK; | |
| 37 | |
| 38 } // GetRect | |
| 39 | |
| 40 | |
| 41 NS_IMETHODIMP | |
| 42 nsScreenGtk :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight) | |
| 43 { | |
| 44 *outLeft = mAvailRect.x; | |
| 45 *outTop = mAvailRect.y; | |
| 46 *outWidth = mAvailRect.width; | |
| 47 *outHeight = mAvailRect.height; | |
| 48 | |
| 49 return NS_OK; | |
| 50 | |
| 51 } // GetAvailRect | |
| 52 | |
| 53 | |
| 54 NS_IMETHODIMP | |
| 55 nsScreenGtk :: GetPixelDepth(int32_t *aPixelDepth) | |
| 56 { | |
| 57 GdkVisual * visual = gdk_screen_get_system_visual(gdk_screen_get_default()); | |
| 58 *aPixelDepth = gdk_visual_get_depth(visual); | |
| 59 | |
| 60 return NS_OK; | |
| 61 | |
| 62 } // GetPixelDepth | |
| 63 | |
| 64 | |
| 65 NS_IMETHODIMP | |
| 66 nsScreenGtk :: GetColorDepth(int32_t *aColorDepth) | |
| 67 { | |
| 68 return GetPixelDepth ( aColorDepth ); | |
| 69 | |
| 70 } // GetColorDepth | |
| 71 | |
| 72 | |
| 73 void | |
| 74 nsScreenGtk :: Init (GdkWindow *aRootWindow) | |
| 75 { | |
| 76 // We listen for configure events on the root window to pick up | |
| 77 // changes to this rect. We could listen for "size_changed" signals | |
| 78 // on the default screen to do this, except that doesn't work with | |
| 79 // versions of GDK predating the GdkScreen object. See bug 256646. | |
| 80 mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height()); | |
| 81 | |
| 82 #ifdef MOZ_X11 | |
| 83 // We need to account for the taskbar, etc in the available rect. | |
| 84 // See http://freedesktop.org/Standards/wm-spec/index.html#id2767771 | |
| 85 | |
| 86 // XXX do we care about _NET_WM_STRUT_PARTIAL? That will | |
| 87 // add much more complexity to the code here (our screen | |
| 88 // could have a non-rectangular shape), but should | |
| 89 // lead to greater accuracy. | |
| 90 | |
| 91 long *workareas; | |
| 92 GdkAtom type_returned; | |
| 93 int format_returned; | |
| 94 int length_returned; | |
| 95 | |
| 96 GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL); | |
| 97 | |
| 98 gdk_error_trap_push(); | |
| 99 | |
| 100 // gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here. | |
| 101 if (!gdk_property_get(aRootWindow, | |
| 102 gdk_atom_intern ("_NET_WORKAREA", FALSE), | |
| 103 cardinal_atom, | |
| 104 0, G_MAXLONG - 3, FALSE, | |
| 105 &type_returned, | |
| 106 &format_returned, | |
| 107 &length_returned, | |
| 108 (guchar **) &workareas)) { | |
| 109 // This window manager doesn't support the freedesktop standard. | |
| 110 // Nothing we can do about it, so assume full screen size. | |
| 111 return; | |
| 112 } | |
| 113 | |
| 114 // Flush the X queue to catch errors now. | |
| 115 gdk_flush(); | |
| 116 | |
| 117 if (!gdk_error_trap_pop() && | |
| 118 type_returned == cardinal_atom && | |
| 119 length_returned && (length_returned % 4) == 0 && | |
| 120 format_returned == 32) { | |
| 121 int num_items = length_returned / sizeof(long); | |
| 122 | |
| 123 for (int i = 0; i < num_items; i += 4) { | |
| 124 nsIntRect workarea(workareas[i], workareas[i + 1], | |
| 125 workareas[i + 2], workareas[i + 3]); | |
| 126 if (!mRect.Contains(workarea)) { | |
| 127 // Note that we hit this when processing screen size changes, | |
| 128 // since we'll get the configure event before the toolbars have | |
| 129 // been moved. We'll end up cleaning this up when we get the | |
| 130 // change notification to the _NET_WORKAREA property. However, | |
| 131 // we still want to listen to both, so we'll handle changes | |
| 132 // properly for desktop environments that don't set the | |
| 133 // _NET_WORKAREA property. | |
| 134 NS_WARNING("Invalid bounds"); | |
| 135 continue; | |
| 136 } | |
| 137 | |
| 138 mAvailRect.IntersectRect(mAvailRect, workarea); | |
| 139 } | |
| 140 } | |
| 141 g_free (workareas); | |
| 142 #endif | |
| 143 } | |
| 144 | |
| 145 #ifdef MOZ_X11 | |
| 146 void | |
| 147 nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo) | |
| 148 { | |
| 149 nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org, | |
| 150 aScreenInfo->width, aScreenInfo->height); | |
| 151 | |
| 152 mScreenNum = aScreenInfo->screen_number; | |
| 153 | |
| 154 mAvailRect = mRect = xineRect; | |
| 155 } | |
| 156 #endif |
