Fix the input region not working properly

The input region was set on the shaped texture, but the shaped texture
was never picked properly, as it was never set to be reactive. Move the
pick implementation and reactivity to the MetaSurfaceActor, and update
the code everywhere else to expect a MetaSurfaceActor.

src/compositor/meta-shaped-texture.c

@@ -42,8 +42,6 @@
 static void meta_shaped_texture_dispose  (GObject    *object);
 
 static void meta_shaped_texture_paint (ClutterActor       *actor);
-static void meta_shaped_texture_pick  (ClutterActor       *actor,
-				       const ClutterColor *color);
 
 static void meta_shaped_texture_get_preferred_width (ClutterActor *self,
                                                      gfloat        for_height,
@@ -73,8 +71,6 @@ struct _MetaShapedTexturePrivate
   CoglTexture *texture;
   CoglTexture *mask_texture;
 
-  cairo_region_t *input_shape_region;
-
   /* The region containing only fully opaque pixels */
   cairo_region_t *opaque_region;
 
@@ -98,7 +94,6 @@ meta_shaped_texture_class_init (MetaShapedTextureClass *klass)
   actor_class->get_preferred_width = meta_shaped_texture_get_preferred_width;
   actor_class->get_preferred_height = meta_shaped_texture_get_preferred_height;
   actor_class->paint = meta_shaped_texture_paint;
-  actor_class->pick = meta_shaped_texture_pick;
   actor_class->get_paint_volume = meta_shaped_texture_get_paint_volume;
 
   g_type_class_add_private (klass, sizeof (MetaShapedTexturePrivate));
@@ -463,71 +458,6 @@ meta_shaped_texture_paint (ClutterActor *actor)
     cairo_region_destroy (blended_region);
 }
 
-static void
-meta_shaped_texture_pick (ClutterActor       *actor,
-			  const ClutterColor *color)
-{
-  MetaShapedTexture *stex = (MetaShapedTexture *) actor;
-  MetaShapedTexturePrivate *priv = stex->priv;
-
-  if (!clutter_actor_should_pick_paint (actor) ||
-      (priv->clip_region && cairo_region_is_empty (priv->clip_region)))
-    return;
-
-  /* If there is no region then use the regular pick */
-  if (priv->input_shape_region == NULL)
-    CLUTTER_ACTOR_CLASS (meta_shaped_texture_parent_class)->pick (actor, color);
-  else
-    {
-      int n_rects;
-      float *rectangles;
-      int i;
-      CoglPipeline *pipeline;
-      CoglContext *ctx;
-      CoglFramebuffer *fb;
-      CoglColor cogl_color;
-
-      /* Note: We don't bother trying to intersect the pick and clip regions
-       * since needing to copy the region, do the intersection, and probably
-       * increase the number of rectangles seems more likely to have a negative
-       * effect.
-       *
-       * NB: Most of the time when just using rectangles for picking then
-       * picking shouldn't involve any rendering, and minimizing the number of
-       * rectangles has more benefit than reducing the area of the pick
-       * region.
-       */
-
-      n_rects = cairo_region_num_rectangles (priv->input_shape_region);
-      rectangles = g_alloca (sizeof (float) * 4 * n_rects);
-
-      for (i = 0; i < n_rects; i++)
-        {
-          cairo_rectangle_int_t rect;
-          int pos = i * 4;
-
-          cairo_region_get_rectangle (priv->input_shape_region, i, &rect);
-
-          rectangles[pos] = rect.x;
-          rectangles[pos + 1] = rect.y;
-          rectangles[pos + 2] = rect.x + rect.width;
-          rectangles[pos + 3] = rect.y + rect.height;
-        }
-
-      ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
-      fb = cogl_get_draw_framebuffer ();
-
-      cogl_color_init_from_4ub (&cogl_color, color->red, color->green, color->blue, color->alpha);
-
-      pipeline = cogl_pipeline_new (ctx);
-      cogl_pipeline_set_color (pipeline, &cogl_color);
-
-      cogl_framebuffer_draw_rectangles (fb, pipeline,
-                                        rectangles, n_rects);
-      cogl_object_unref (pipeline);
-    }
-}
-
 static void
 meta_shaped_texture_get_preferred_width (ClutterActor *self,
                                          gfloat        for_height,
@@ -764,41 +694,6 @@ meta_shaped_texture_get_texture (MetaShapedTexture *stex)
   return COGL_TEXTURE (stex->priv->texture);
 }
 
-/**
- * meta_shaped_texture_set_input_shape_region:
- * @stex: a #MetaShapedTexture
- * @shape_region: the region of the texture that should respond to
- *    input.
- *
- * Determines what region of the texture should accept input. For
- * X based windows this is defined by the ShapeInput region of the
- * window.
- */
-void
-meta_shaped_texture_set_input_shape_region (MetaShapedTexture *stex,
-                                            cairo_region_t    *shape_region)
-{
-  MetaShapedTexturePrivate *priv;
-
-  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
-
-  priv = stex->priv;
-
-  if (priv->input_shape_region != NULL)
-    {
-      cairo_region_destroy (priv->input_shape_region);
-      priv->input_shape_region = NULL;
-    }
-
-  if (shape_region != NULL)
-    {
-      cairo_region_reference (shape_region);
-      priv->input_shape_region = shape_region;
-    }
-
-  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
-}
-
 /**
  * meta_shaped_texture_set_opaque_region:
  * @stex: a #MetaShapedTexture

src/compositor/meta-surface-actor.c

@@ -22,8 +22,12 @@
 
 struct _MetaSurfaceActorPrivate
 {
+  MetaWaylandSurface *surface;
+
   MetaShapedTexture *texture;
   MetaWaylandBuffer *buffer;
+
+  cairo_region_t *input_region;
 };
 
 static void cullable_iface_init (MetaCullableInterface *iface);
@@ -39,9 +43,77 @@ meta_surface_actor_get_unobscured_bounds (MetaSurfaceActor      *self,
   return meta_shaped_texture_get_unobscured_bounds (priv->texture, unobscured_bounds);
 }
 
+static void
+meta_surface_actor_pick (ClutterActor       *actor,
+                         const ClutterColor *color)
+{
+  MetaSurfaceActor *self = META_SURFACE_ACTOR (actor);
+  MetaSurfaceActorPrivate *priv = self->priv;
+
+  if (!clutter_actor_should_pick_paint (actor))
+    return;
+
+  /* If there is no region then use the regular pick */
+  if (priv->input_region == NULL)
+    CLUTTER_ACTOR_CLASS (meta_surface_actor_parent_class)->pick (actor, color);
+  else
+    {
+      int n_rects;
+      float *rectangles;
+      int i;
+      CoglPipeline *pipeline;
+      CoglContext *ctx;
+      CoglFramebuffer *fb;
+      CoglColor cogl_color;
+
+      n_rects = cairo_region_num_rectangles (priv->input_region);
+      rectangles = g_alloca (sizeof (float) * 4 * n_rects);
+
+      for (i = 0; i < n_rects; i++)
+        {
+          cairo_rectangle_int_t rect;
+          int pos = i * 4;
+
+          cairo_region_get_rectangle (priv->input_region, i, &rect);
+
+          rectangles[pos + 0] = rect.x;
+          rectangles[pos + 1] = rect.y;
+          rectangles[pos + 2] = rect.x + rect.width;
+          rectangles[pos + 3] = rect.y + rect.height;
+        }
+
+      ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
+      fb = cogl_get_draw_framebuffer ();
+
+      cogl_color_init_from_4ub (&cogl_color, color->red, color->green, color->blue, color->alpha);
+
+      pipeline = cogl_pipeline_new (ctx);
+      cogl_pipeline_set_color (pipeline, &cogl_color);
+      cogl_framebuffer_draw_rectangles (fb, pipeline, rectangles, n_rects);
+      cogl_object_unref (pipeline);
+    }
+}
+
+static void
+meta_surface_actor_dispose (GObject *object)
+{
+  MetaSurfaceActor *self = META_SURFACE_ACTOR (object);
+  MetaSurfaceActorPrivate *priv = self->priv;
+
+  g_clear_pointer (&priv->input_region, cairo_region_destroy);
+
+  G_OBJECT_CLASS (meta_surface_actor_parent_class)->dispose (object);
+}
+
 static void
 meta_surface_actor_class_init (MetaSurfaceActorClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+
+  object_class->dispose = meta_surface_actor_dispose;
+  actor_class->pick = meta_surface_actor_pick;
+
   g_type_class_add_private (klass, sizeof (MetaSurfaceActorPrivate));
 }
 
@@ -172,7 +244,14 @@ meta_surface_actor_set_input_region (MetaSurfaceActor *self,
                                      cairo_region_t   *region)
 {
   MetaSurfaceActorPrivate *priv = self->priv;
-  meta_shaped_texture_set_input_shape_region (priv->texture, region);
+
+  if (priv->input_region)
+    cairo_region_destroy (priv->input_region);
+
+  if (region)
+    priv->input_region = cairo_region_reference (region);
+  else
+    priv->input_region = NULL;
 }
 
 void
@@ -183,8 +262,20 @@ meta_surface_actor_set_opaque_region (MetaSurfaceActor *self,
   meta_shaped_texture_set_opaque_region (priv->texture, region);
 }
 
-MetaSurfaceActor *
+MetaWaylandSurface *
-meta_surface_actor_new (void)
+meta_surface_actor_get_surface (MetaSurfaceActor *self)
 {
-  return g_object_new (META_TYPE_SURFACE_ACTOR, NULL);
+  MetaSurfaceActorPrivate *priv = self->priv;
+  return priv->surface;
+}
+
+MetaSurfaceActor *
+meta_surface_actor_new (MetaWaylandSurface *surface)
+{
+  MetaSurfaceActor *self = g_object_new (META_TYPE_SURFACE_ACTOR, NULL);
+  MetaSurfaceActorPrivate *priv = self->priv;
+
+  priv->surface = surface;
+
+  return self;
 }

src/compositor/meta-surface-actor.h

@@ -36,7 +36,7 @@ struct _MetaSurfaceActor
 
 GType meta_surface_actor_get_type (void);
 
-MetaSurfaceActor *meta_surface_actor_new (void);
+MetaSurfaceActor *meta_surface_actor_new (MetaWaylandSurface *surface);
 
 cairo_surface_t *meta_surface_actor_get_image (MetaSurfaceActor      *self,
                                                cairo_rectangle_int_t *clip);
@@ -63,6 +63,8 @@ void meta_surface_actor_set_input_region (MetaSurfaceActor *self,
 void meta_surface_actor_set_opaque_region (MetaSurfaceActor *self,
                                            cairo_region_t   *region);
 
+MetaWaylandSurface *meta_surface_actor_get_surface (MetaSurfaceActor *surface);
+
 G_END_DECLS
 
 #endif /* META_SURFACE_ACTOR_PRIVATE_H */

src/compositor/meta-window-actor.c

@@ -353,7 +353,7 @@ meta_window_actor_constructed (GObject *object)
       if (window->surface)
         priv->surface = window->surface->surface_actor;
       else
-        priv->surface = meta_surface_actor_new ();
+        priv->surface = meta_surface_actor_new (NULL);
       g_object_ref_sink (priv->surface);
 
       clutter_actor_add_child (CLUTTER_ACTOR (self), CLUTTER_ACTOR (priv->surface));
@@ -1424,7 +1424,6 @@ meta_window_actor_hide (MetaWindowActor *self,
   g_return_if_fail (priv->visible);
 
   priv->visible = FALSE;
-  clutter_actor_set_reactive (CLUTTER_ACTOR (self), FALSE);
 
   /* If a plugin is animating a workspace transition, we have to
    * hold off on hiding the window, and do it after the workspace
@@ -1557,8 +1556,6 @@ meta_window_actor_new (MetaWindow *window)
 
   clutter_actor_hide (CLUTTER_ACTOR (self));
 
-  clutter_actor_set_reactive (CLUTTER_ACTOR (self), TRUE);
-
   /* Initial position in the stack is arbitrary; stacking will be synced
    * before we first paint.
    */

src/core/display.c

@@ -1682,8 +1682,12 @@ get_window_for_event (MetaDisplay        *display,
     return display->grab_window;
 
   source = clutter_event_get_source (event);
-  if (META_IS_WINDOW_ACTOR (source))
+  if (META_IS_SURFACE_ACTOR (source))
-    return meta_window_actor_get_meta_window (META_WINDOW_ACTOR (source));
+    {
+      MetaWaylandSurface *surface = meta_surface_actor_get_surface (META_SURFACE_ACTOR (source));
+      g_assert (surface != NULL);
+      return surface->window;
+    }
 
   return NULL;
 }

src/meta/meta-shaped-texture.h

@@ -75,9 +75,6 @@ CoglTexture * meta_shaped_texture_get_texture (MetaShapedTexture *stex);
 
 void meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex,
                                            CoglTexture       *mask_texture);
-void meta_shaped_texture_set_input_shape_region (MetaShapedTexture *stex,
-                                                 cairo_region_t    *shape_region);
-
 void meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex,
                                             cairo_region_t    *opaque_region);
 

src/wayland/meta-wayland-seat.c

@@ -420,13 +420,8 @@ meta_wayland_seat_repick (MetaWaylandSeat    *seat,
   else
     seat->current_stage = NULL;
 
-  if (META_IS_WINDOW_ACTOR (actor))
+  if (META_IS_SURFACE_ACTOR (actor))
-    {
+    surface = meta_surface_actor_get_surface (META_SURFACE_ACTOR (actor));
-      MetaWindow *window =
-        meta_window_actor_get_meta_window (META_WINDOW_ACTOR (actor));
-
-      surface = window->surface;
-    }
 
   pointer->current = surface;
   if (surface != pointer->focus_surface)

src/wayland/meta-wayland-surface.c

@@ -645,7 +645,8 @@ meta_wayland_surface_create (MetaWaylandCompositor *compositor,
   wl_resource_set_implementation (surface->resource, &meta_wayland_surface_interface, surface, wl_surface_destructor);
 
   surface->buffer_destroy_listener.notify = surface_handle_buffer_destroy;
-  surface->surface_actor = g_object_ref_sink (meta_surface_actor_new ());
+  surface->surface_actor = g_object_ref_sink (meta_surface_actor_new (surface));
+  clutter_actor_set_reactive (CLUTTER_ACTOR (surface->surface_actor), TRUE);
 
   double_buffered_state_init (&surface->pending);