Currently, weston assumes a surface/view is mapped if
it has an output assigned. In a zero outputs scenario,
this isn't really desirable.

This patch introduces a new flag to weston_surface and
weston_view, which has to be set manually to indicate
that a surface/view is mapped.

Signed-off-by: Armin Krezović <[email protected]>
---
 src/compositor.c  | 29 ++++++++++-------------------
 src/compositor.h  |  4 ++++
 src/data-device.c |  2 ++
 src/input.c       |  2 ++
 4 files changed, 18 insertions(+), 19 deletions(-)

diff --git a/src/compositor.c b/src/compositor.c
index d246046..b25c671 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -1549,19 +1549,13 @@ weston_view_set_mask_infinite(struct weston_view *view)
 WL_EXPORT bool
 weston_view_is_mapped(struct weston_view *view)
 {
-       if (view->output)
-               return true;
-       else
-               return false;
+       return view->is_mapped;
 }
 
 WL_EXPORT bool
 weston_surface_is_mapped(struct weston_surface *surface)
 {
-       if (surface->output)
-               return true;
-       else
-               return false;
+       return surface->is_mapped;
 }
 
 static void
@@ -1738,6 +1732,7 @@ weston_view_unmap(struct weston_view *view)
        weston_view_damage_below(view);
        view->output = NULL;
        view->plane = NULL;
+       view->is_mapped = false;
        weston_layer_entry_remove(&view->layer_link);
        wl_list_remove(&view->link);
        wl_list_init(&view->link);
@@ -1769,6 +1764,7 @@ weston_surface_unmap(struct weston_surface *surface)
 
        wl_list_for_each(view, &surface->views, surface_link)
                weston_view_unmap(view);
+       surface->is_mapped = false;
        surface->output = NULL;
 }
 
@@ -2131,6 +2127,7 @@ view_list_add_subsurface_view(struct weston_compositor 
*compositor,
 
        view->parent_view = parent;
        weston_view_update_transform(view);
+       view->is_mapped = true;
 
        if (wl_list_empty(&sub->surface->subsurface_list)) {
                wl_list_insert(compositor->view_list.prev, &view->link);
@@ -2152,6 +2149,7 @@ view_list_add(struct weston_compositor *compositor,
        struct weston_subsurface *sub;
 
        weston_view_update_transform(view);
+       view->is_mapped = true;
 
        if (wl_list_empty(&view->surface->subsurface_list)) {
                wl_list_insert(compositor->view_list.prev, &view->link);
@@ -3244,7 +3242,6 @@ subsurface_get_label(struct weston_surface *surface, char 
*buf, size_t len)
 static void
 subsurface_configure(struct weston_surface *surface, int32_t dx, int32_t dy)
 {
-       struct weston_compositor *compositor = surface->compositor;
        struct weston_view *view;
 
        wl_list_for_each(view, &surface->views, surface_link)
@@ -3256,8 +3253,9 @@ subsurface_configure(struct weston_surface *surface, 
int32_t dx, int32_t dy)
         * mapped, parent is not in a visible layer, so this sub-surface
         * will not be drawn either.
         */
-       if (!weston_surface_is_mapped(surface)) {
-               struct weston_output *output;
+
+       if (!weston_surface_is_mapped(surface))
+               surface->is_mapped = true;
 
                /* Cannot call weston_view_update_transform(),
                 * because that would call it also for the parent surface,
@@ -3265,18 +3263,11 @@ subsurface_configure(struct weston_surface *surface, 
int32_t dx, int32_t dy)
                 * inconsistent state, where the window could never be
                 * mapped.
                 *
-                * Instead just assign any output, to make
+                * Instead just force the is_mapped flag on, to make
                 * weston_surface_is_mapped() return true, so that when the
                 * parent surface does get mapped, this one will get
                 * included, too. See view_list_add().
                 */
-               assert(!wl_list_empty(&compositor->output_list));
-               output = container_of(compositor->output_list.next,
-                                     struct weston_output, link);
-
-               surface->output = output;
-               weston_surface_update_output_mask(surface, 1u << output->id);
-       }
 }
 
 static struct weston_subsurface *
diff --git a/src/compositor.h b/src/compositor.h
index 9e5155c..8770982 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -964,6 +964,8 @@ struct weston_view {
 
        /* Per-surface Presentation feedback flags, controlled by backend. */
        uint32_t psf_flags;
+
+       bool is_mapped;
 };
 
 struct weston_surface_state {
@@ -1082,6 +1084,8 @@ struct weston_surface {
        const char *role_name;
 
        struct weston_timeline_object timeline;
+
+       bool is_mapped;
 };
 
 struct weston_subsurface {
diff --git a/src/data-device.c b/src/data-device.c
index f04f030..44a08f9 100644
--- a/src/data-device.c
+++ b/src/data-device.c
@@ -421,6 +421,8 @@ drag_surface_configure(struct weston_drag *drag,
                weston_layer_entry_insert(list, &drag->icon->layer_link);
                weston_view_update_transform(drag->icon);
                pixman_region32_clear(&es->pending.input);
+               es->is_mapped = true;
+               drag->icon->is_mapped = true;
        }
 
        drag->dx += sx;
diff --git a/src/input.c b/src/input.c
index 08378d1..5ccc75f 100644
--- a/src/input.c
+++ b/src/input.c
@@ -1950,6 +1950,8 @@ pointer_cursor_surface_configure(struct weston_surface 
*es,
                
weston_layer_entry_insert(&es->compositor->cursor_layer.view_list,
                                          &pointer->sprite->layer_link);
                weston_view_update_transform(pointer->sprite);
+               es->is_mapped = true;
+               pointer->sprite->is_mapped = true;
        }
 }
 
-- 
2.9.0

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