Align titles to baseline

This does the following:

* Adds a baseline argument to get_text_size (the baseline is the
distance from the top of the texture to the baseline).
* Stores the baseline in the container when calculating the title
height.
* Takes the baseline into account when calculating the config's max font
height.
* When rendering, pads the textures according to the baseline so they
line up.

1 files changed, 6 insertions, 4 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index cbbb1f56..ccd79f0e 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -455,8 +455,8 @@ static void update_title_texture(struct sway_container *con,
         int height = con->title_height * scale;
 
         cairo_t *c = cairo_create(NULL);
-        get_text_size(c, config->font, &width, NULL, scale, config->pango_markup,
-                        "%s", con->formatted_title);
+        get_text_size(c, config->font, &width, NULL, NULL, scale,
+                        config->pango_markup, "%s", con->formatted_title);
         cairo_destroy(c);
 
         cairo_surface_t *surface = cairo_image_surface_create(
@@ -505,10 +505,12 @@ void container_calculate_title_height(struct sway_container *container) {
         }
         cairo_t *cairo = cairo_create(NULL);
         int height;
-        get_text_size(cairo, config->font, NULL, &height, 1, config->pango_markup,
-                        "%s", container->formatted_title);
+        int baseline;
+        get_text_size(cairo, config->font, NULL, &height, &baseline, 1,
+                        config->pango_markup, "%s", container->formatted_title);
         cairo_destroy(cairo);
         container->title_height = height;
+        container->title_baseline = baseline;
 }
 
 /**