std::vector<et::Screen> et::availableScreens()
{
std::vector<et::Screen> result;
EnumDisplayMonitors(nullptr, nullptr, [](HMONITOR hMonitor, HDC, LPRECT, LPARAM dwData) -> BOOL
{
MONITORINFO info = { sizeof(MONITORINFO) };
GetMonitorInfo(hMonitor, &info);
recti screenRect(info.rcMonitor.left, info.rcMonitor.top, info.rcMonitor.right - info.rcMonitor.left,
info.rcMonitor.bottom - info.rcMonitor.top);
recti workarea(info.rcWork.left, info.rcWork.top, info.rcWork.right - info.rcWork.left,
info.rcWork.bottom - info.rcWork.top);
std::vector<et::Screen>* r = reinterpret_cast<std::vector<et::Screen>*>(dwData);
r->emplace_back(screenRect, workarea, 1);
return 1;
},
reinterpret_cast<LPARAM>(&result));
return result;
}
void
nsCairoScreen::Init ()
{
#ifdef MOZ_ENABLE_GTK2
mAvailRect = mRect = nsRect(0, 0, gdk_screen_width(), gdk_screen_height());
// We need to account for the taskbar, etc in the available rect.
// See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
// XXX It doesn't change that often, but we should probably
// listen for changes to _NET_WORKAREA.
// 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.
#if GTK_CHECK_VERSION(2,2,0)
GdkWindow *root_window = gdk_get_default_root_window();
#else
GdkWindow *root_window = GDK_ROOT_PARENT();
#endif // GTK_CHECK_VERSION(2,2,0)
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(root_window,
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) {
nsRect workarea(workareas[i], workareas[i + 1],
workareas[i + 2], workareas[i + 3]);
if (!mRect.Contains(workarea)) {
NS_WARNING("Invalid bounds");
continue;
}
mAvailRect.IntersectRect(mAvailRect, workarea);
}
}
#elif MOZ_ENABLE_XLIB
mScreenNum = 0;
mRect.x = mAvailRect.x = 0;
mRect.y = mAvailRect.y = 0;
mRect.width = mAvailRect.width = 1600;
mRect.height = mAvailRect.height = 1200;
#endif
}
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
}
