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wayland: Do not constrain saved window size

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Under Wayland, an xdg_surface.configure with size 0x0 means it's up to
the client to set its size.

When transitioning from maximized state to un-maximized, the Wayland
compositor will send such an 0x0 configure so that the client can
restore its original size.

However, the original size was already constrained, so re-applying
size constrains can lead to a smaller size when using size increments.

Avoid this caveat by not applying size constrains when we are restoring
the original size.

https://bugzilla.gnome.org/show_bug.cgi?id=777072
This commit is contained in:
Olivier Fourdan 2017-06-21 15:02:05 +02:00 committed by Matthias Clasen
parent 07beb6dba2
commit 028e39d6ee
1 changed files with 15 additions and 10 deletions
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25
gdk/wayland/gdkwindow-wayland.c
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@ -1351,6 +1351,7 @@ xdg_surface_configure (void *data,
int width = impl->pending.width;
int height = impl->pending.height;
gboolean fixed_size;
gboolean saved_size;
if (!impl->initial_configure_received)
{
@ -1370,6 +1371,7 @@ xdg_surface_configure (void *data,
fixed_size =
new_state & (GDK_WINDOW_STATE_MAXIMIZED | GDK_WINDOW_STATE_FULLSCREEN | GDK_WINDOW_STATE_TILED);
saved_size = (width == 0 && height == 0);
/* According to xdg_shell, an xdg_surface.configure with size 0x0
* should be interpreted as that it is up to the client to set a
* size.
@ -1378,7 +1380,7 @@ xdg_surface_configure (void *data,
* the client should configure its size back to what it was before
* being maximize or fullscreen.
*/
if (width == 0 && height == 0 && !fixed_size)
if (saved_size && !fixed_size)
{
width = impl->saved_width;
height = impl->saved_height;
@ -1391,16 +1393,19 @@ xdg_surface_configure (void *data,
/* Ignore size increments for maximized/fullscreen windows */
if (fixed_size)
geometry_mask &= ~GDK_HINT_RESIZE_INC;
if (!saved_size)
{
/* Do not reapply contrains if we are restoring original size */
gdk_window_constrain_size (&impl->geometry_hints,
geometry_mask,
width + impl->margin_left + impl->margin_right,
height + impl->margin_top + impl->margin_bottom,
&width,
&height);
gdk_window_constrain_size (&impl->geometry_hints,
geometry_mask,
width + impl->margin_left + impl->margin_right,
height + impl->margin_top + impl->margin_bottom,
&width,
&height);
/* Save size for next time we get 0x0 */
_gdk_wayland_window_save_size (window);
/* Save size for next time we get 0x0 */
_gdk_wayland_window_save_size (window);
}
gdk_wayland_window_configure (window, width, height, impl->scale);
}