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wayland: Implement subsurface.place_below() for parents

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Flatten the subsurface actor tree, making all surface actors children
of the window actor.
Save the subsurface state in a GNode tree in MetaWaylandSurface, where
each surface holds two nodes, one branch, which can be the tree root
or be attached to a parent surfaces branch, and a leaf, which is
used to save the position relative to child branch nodes.

Each time a surface is added or reordered in the tree, unparent all
surface actors from the window actor, traverse all leaves of the
tree and readd the corresponding surface actors back to the window
actor.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/664
This commit is contained in:
Robert Mader
2019-06-30 15:18:46 +02:00
parent a51437ee2b
commit 77229f99b8
11 changed files with 261 additions and 67 deletions
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15
src/wayland/meta-wayland-shell-surface.c
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@ -43,19 +43,24 @@ meta_wayland_shell_surface_calculate_geometry (MetaWaylandShellSurface *shell_su
MetaWaylandSurface *surface =
meta_wayland_surface_role_get_surface (surface_role);
MetaRectangle geometry;
GList *l;
GNode *n;
geometry = (MetaRectangle) {
.width = meta_wayland_surface_get_width (surface),
.height = meta_wayland_surface_get_height (surface),
};
for (l = surface->subsurfaces; l; l = l->next)
for (n = g_node_first_child (surface->subsurface_branch_node);
n;
n = g_node_next_sibling (n))
{
MetaWaylandSurface *subsurface_surface = l->data;
MetaWaylandSubsurface *subsurface =
META_WAYLAND_SUBSURFACE (subsurface_surface->role);
MetaWaylandSurface *subsurface_surface = n->data;
MetaWaylandSubsurface *subsurface;
if (G_NODE_IS_LEAF (n))
continue;
subsurface = META_WAYLAND_SUBSURFACE (subsurface_surface->role);
meta_wayland_subsurface_union_geometry (subsurface,
0, 0,
&geometry);