michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsScreenGtk.h"
michael@0: 
michael@0: #include <gdk/gdk.h>
michael@0: #ifdef MOZ_X11
michael@0: #include <gdk/gdkx.h>
michael@0: #include <X11/Xatom.h>
michael@0: #endif
michael@0: #include <gtk/gtk.h>
michael@0: 
michael@0: nsScreenGtk :: nsScreenGtk (  )
michael@0:   : mScreenNum(0),
michael@0:     mRect(0, 0, 0, 0),
michael@0:     mAvailRect(0, 0, 0, 0)
michael@0: {
michael@0: }
michael@0: 
michael@0: 
michael@0: nsScreenGtk :: ~nsScreenGtk()
michael@0: {
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenGtk :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   *outLeft = mRect.x;
michael@0:   *outTop = mRect.y;
michael@0:   *outWidth = mRect.width;
michael@0:   *outHeight = mRect.height;
michael@0: 
michael@0:   return NS_OK;
michael@0:   
michael@0: } // GetRect
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenGtk :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   *outLeft = mAvailRect.x;
michael@0:   *outTop = mAvailRect.y;
michael@0:   *outWidth = mAvailRect.width;
michael@0:   *outHeight = mAvailRect.height;
michael@0: 
michael@0:   return NS_OK;
michael@0:   
michael@0: } // GetAvailRect
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP 
michael@0: nsScreenGtk :: GetPixelDepth(int32_t *aPixelDepth)
michael@0: {
michael@0:   GdkVisual * visual = gdk_screen_get_system_visual(gdk_screen_get_default());
michael@0:   *aPixelDepth = gdk_visual_get_depth(visual);
michael@0: 
michael@0:   return NS_OK;
michael@0: 
michael@0: } // GetPixelDepth
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP 
michael@0: nsScreenGtk :: GetColorDepth(int32_t *aColorDepth)
michael@0: {
michael@0:   return GetPixelDepth ( aColorDepth );
michael@0: 
michael@0: } // GetColorDepth
michael@0: 
michael@0: 
michael@0: void
michael@0: nsScreenGtk :: Init (GdkWindow *aRootWindow)
michael@0: {
michael@0:   // We listen for configure events on the root window to pick up
michael@0:   // changes to this rect.  We could listen for "size_changed" signals
michael@0:   // on the default screen to do this, except that doesn't work with
michael@0:   // versions of GDK predating the GdkScreen object.  See bug 256646.
michael@0:   mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height());
michael@0: 
michael@0: #ifdef MOZ_X11
michael@0:   // We need to account for the taskbar, etc in the available rect.
michael@0:   // See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
michael@0: 
michael@0:   // XXX do we care about _NET_WM_STRUT_PARTIAL?  That will
michael@0:   // add much more complexity to the code here (our screen
michael@0:   // could have a non-rectangular shape), but should
michael@0:   // lead to greater accuracy.
michael@0: 
michael@0:   long *workareas;
michael@0:   GdkAtom type_returned;
michael@0:   int format_returned;
michael@0:   int length_returned;
michael@0: 
michael@0:   GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
michael@0: 
michael@0:   gdk_error_trap_push();
michael@0: 
michael@0:   // gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here.
michael@0:   if (!gdk_property_get(aRootWindow,
michael@0:                         gdk_atom_intern ("_NET_WORKAREA", FALSE),
michael@0:                         cardinal_atom,
michael@0:                         0, G_MAXLONG - 3, FALSE,
michael@0:                         &type_returned,
michael@0:                         &format_returned,
michael@0:                         &length_returned,
michael@0:                         (guchar **) &workareas)) {
michael@0:     // This window manager doesn't support the freedesktop standard.
michael@0:     // Nothing we can do about it, so assume full screen size.
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // Flush the X queue to catch errors now.
michael@0:   gdk_flush();
michael@0: 
michael@0:   if (!gdk_error_trap_pop() &&
michael@0:       type_returned == cardinal_atom &&
michael@0:       length_returned && (length_returned % 4) == 0 &&
michael@0:       format_returned == 32) {
michael@0:     int num_items = length_returned / sizeof(long);
michael@0: 
michael@0:     for (int i = 0; i < num_items; i += 4) {
michael@0:       nsIntRect workarea(workareas[i],     workareas[i + 1],
michael@0:                          workareas[i + 2], workareas[i + 3]);
michael@0:       if (!mRect.Contains(workarea)) {
michael@0:         // Note that we hit this when processing screen size changes,
michael@0:         // since we'll get the configure event before the toolbars have
michael@0:         // been moved.  We'll end up cleaning this up when we get the
michael@0:         // change notification to the _NET_WORKAREA property.  However,
michael@0:         // we still want to listen to both, so we'll handle changes
michael@0:         // properly for desktop environments that don't set the
michael@0:         // _NET_WORKAREA property.
michael@0:         NS_WARNING("Invalid bounds");
michael@0:         continue;
michael@0:       }
michael@0: 
michael@0:       mAvailRect.IntersectRect(mAvailRect, workarea);
michael@0:     }
michael@0:   }
michael@0:   g_free (workareas);
michael@0: #endif
michael@0: }
michael@0: 
michael@0: #ifdef MOZ_X11
michael@0: void
michael@0: nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo)
michael@0: {
michael@0:   nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org,
michael@0:                      aScreenInfo->width, aScreenInfo->height);
michael@0: 
michael@0:   mScreenNum = aScreenInfo->screen_number;
michael@0: 
michael@0:   mAvailRect = mRect = xineRect;
michael@0: }
michael@0: #endif