Use scissor to render title texture

This allows the title's texture to always be the full width of the text,
and clipped at render time according to the desired width (eg. tabs...).

As an added bonus, the texture no longer needs to be updated when
containers are arranged.

3 files changed, 3 insertions, 12 deletions

diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 03af4239..d17a6e14 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -308,12 +308,10 @@ static void render_container_simple_border_normal(struct sway_output *output,
 
 	// Title text
 	if (title_texture) {
-		double x = (con->x + con->sway_view->border_thickness)
-			* output->wlr_output->scale;
-		double y = (con->y + con->sway_view->border_thickness)
-			* output->wlr_output->scale;
+		wlr_renderer_scissor(renderer, &box);
 		wlr_render_texture(renderer, title_texture,
-				output->wlr_output->transform_matrix, x, y, 1);
+				output->wlr_output->transform_matrix, box.x, box.y, 1);
+		wlr_renderer_scissor(renderer, NULL);
 	}
 }
 
diff --git a/sway/tree/arrange.c b/sway/tree/arrange.c
index 1299beb6..83bb20fb 100644
--- a/sway/tree/arrange.c
+++ b/sway/tree/arrange.c
@@ -203,7 +203,6 @@ void arrange_children_of(struct sway_container *parent) {
 		} else {
 			arrange_children_of(child);
 		}
-		container_update_title_textures(child);
 	}
 	container_damage_whole(parent);
 	update_debug_tree();
diff --git a/sway/tree/container.c b/sway/tree/container.c
index 3746ad81..9fb47020 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -584,12 +584,6 @@ static void update_title_texture(struct sway_container *con,
 	get_text_size(c, config->font, &width, NULL, scale, false, "%s", con->name);
 	cairo_destroy(c);
 
-	int borders = (con->type == C_VIEW ? con->sway_view->border_thickness :
-			config->border_thickness) * 2 * scale;
-	if (width > con->width * scale - borders) {
-		width = con->width * scale - borders;
-	}
-
 	cairo_surface_t *surface = cairo_image_surface_create(
 			CAIRO_FORMAT_ARGB32, width, height);
 	cairo_t *cairo = cairo_create(surface);