More fullscreen fixes.

* Render fullscreen views without wlr function, which makes popups and
lockscreen work.
* Don't allow input events to surfaces behind fullscreen views.
* Use correct output dimensions (for rotated outputs).

sway/desktop/output.c

@@ -229,7 +229,11 @@ static void render_container_iterator(struct sway_container *con,
 
 static void render_container(struct sway_output *output,
 		struct sway_container *con) {
-	container_descendants(con, C_VIEW, render_container_iterator, output);
+	if (con->type == C_VIEW) { // Happens if a view is fullscreened
+		render_container_iterator(con, output);
+	} else {
+		container_descendants(con, C_VIEW, render_container_iterator, output);
+	}
 }
 
 static struct sway_container *output_get_active_workspace(
@@ -277,10 +281,8 @@ static void render_output(struct sway_output *output, struct timespec *when,
 	struct sway_container *workspace = output_get_active_workspace(output);
 
 	if (workspace->sway_workspace->fullscreen) {
-		wlr_output_set_fullscreen_surface(wlr_output,
-				workspace->sway_workspace->fullscreen->surface);
+		render_container(output, workspace->sway_workspace->fullscreen->swayc);
 	} else {
-		wlr_output_set_fullscreen_surface(wlr_output, NULL);
 		render_layer(output,
 				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
 		render_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);

sway/input/cursor.c

@@ -12,6 +12,7 @@
 #include "sway/layers.h"
 #include "sway/output.h"
 #include "sway/tree/view.h"
+#include "sway/tree/workspace.h"
 #include "wlr-layer-shell-unstable-v1-protocol.h"
 
 static struct wlr_surface *layer_surface_at(struct sway_output *output,
@@ -89,6 +90,13 @@ static struct sway_container *container_at_cursor(struct sway_cursor *cursor,
 		return ws;
 	}
 
+	if (ws->sway_workspace->fullscreen) {
+		*sx = ox;
+		*sy = oy;
+		*surface = ws->sway_workspace->fullscreen->surface;
+		return ws->sway_workspace->fullscreen->swayc;
+	}
+
 	struct sway_container *c;
 	if ((c = container_at(ws, cursor->cursor->x, cursor->cursor->y,
 					surface, sx, sy))) {

sway/tree/layout.c

@@ -598,10 +598,8 @@ void arrange_windows(struct sway_container *container,
 
 	if (container->type == C_WORKSPACE
 			&& container->sway_workspace->fullscreen) {
-		struct wlr_output *wlr_output
-			= container->parent->sway_output->wlr_output;
 		view_configure(container->sway_workspace->fullscreen, 0, 0,
-				wlr_output->width, wlr_output->height);
+				container->parent->width, container->parent->height);
 	}
 
 	double x = 0, y = 0;