Fix popups

Fixes the render and container_at order for popups.

Fixes #2210

For rendering:

* render_view_surfaces has been renamed to render_view_toplevels
* render_view_toplevels now uses output_surface_for_each_surface (which
is now public), as that function uses wlr_surface_for_each_surface which
doesn't descend into popups
* Views now have a for_each_popup iterator, which is used by the
renderer to render the focused view's popups
* When rendering a popup, toplevels (xdg subsurfaces) of that popup are
also rendered

For sending frame done, the logic has been updated to match the
rendering logic:

* send_frame_done_container no longer descends into popups
* for_each_popup is used to send frame done to the focused view's popups
and their child toplevels

For container_at:

* floating_container_at is now static, which means it had to be moved
higher in the file.
* container_at now considers popups for the focused view before checking
containers.
* tiling_container_at has been introduced, so that it doesn't call
container_at recursively (it would check popups recursively if it did)

1 files changed, 33 insertions, 4 deletions

diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index f25055b8..ea4361f2 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -186,13 +186,36 @@ static void premultiply_alpha(float color[4], float opacity) {
 	color[2] *= color[3];
 }
 
-static void render_view_surfaces(struct sway_view *view,
+static void render_view_toplevels(struct sway_view *view,
 		struct sway_output *output, pixman_region32_t *damage, float alpha) {
 	struct render_data data = {
 		.damage = damage,
 		.alpha = alpha,
 	};
-	output_view_for_each_surface(output, view, render_surface_iterator, &data);
+	// Render all toplevels without descending into popups
+	output_surface_for_each_surface(output, view->surface,
+			view->swayc->current.view_x, view->swayc->current.view_y,
+			render_surface_iterator, &data);
+}
+
+static void render_popup_iterator(struct sway_output *output,
+		struct wlr_surface *surface, struct wlr_box *box, float rotation,
+		void *data) {
+	// Render this popup's surface
+	render_surface_iterator(output, surface, box, rotation, data);
+
+	// Render this popup's child toplevels
+	output_surface_for_each_surface(output, surface, box->x, box->y,
+			render_surface_iterator, data);
+}
+
+static void render_view_popups(struct sway_view *view,
+		struct sway_output *output, pixman_region32_t *damage, float alpha) {
+	struct render_data data = {
+		.damage = damage,
+		.alpha = alpha,
+	};
+	output_view_for_each_popup(output, view, render_popup_iterator, &data);
 }
 
 static void render_saved_view(struct sway_view *view,
@@ -241,7 +264,7 @@ static void render_view(struct sway_output *output, pixman_region32_t *damage,
 	if (view->swayc->instructions->length) {
 		render_saved_view(view, output, damage, view->swayc->alpha);
 	} else {
-		render_view_surfaces(view, output, damage, view->swayc->alpha);
+		render_view_toplevels(view, output, damage, view->swayc->alpha);
 	}
 
 	if (view->using_csd) {
@@ -845,7 +868,7 @@ void output_render(struct sway_output *output, struct timespec *when,
 				render_saved_view(fullscreen_con->sway_view,
 						output, damage, 1.0f);
 			} else {
-				render_view_surfaces(fullscreen_con->sway_view,
+				render_view_toplevels(fullscreen_con->sway_view,
 						output, damage, 1.0f);
 			}
 		} else {
@@ -881,6 +904,12 @@ void output_render(struct sway_output *output, struct timespec *when,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
 	}
 
+	struct sway_seat *seat = input_manager_current_seat(input_manager);
+	struct sway_container *focus = seat_get_focus(seat);
+	if (focus && focus->type == C_VIEW) {
+		render_view_popups(focus->sway_view, output, damage, focus->alpha);
+	}
+
 render_overlay:
 	render_layer(output, damage,
 		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);