1 files changed, 122 insertions, 1 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index 6ac59547..90ca9b2c 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -7,6 +7,8 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_wl_shell.h>
+#include "cairo.h"
+#include "pango.h"
 #include "sway/config.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
@@ -120,6 +122,13 @@ static void _container_destroy(struct sway_container *cont) {
         if (cont->name) {
                 free(cont->name);
         }
+        if (cont->title_focused) {
+                // If one is set then all of these are set
+                wlr_texture_destroy(cont->title_focused);
+                wlr_texture_destroy(cont->title_focused_inactive);
+                wlr_texture_destroy(cont->title_unfocused);
+                wlr_texture_destroy(cont->title_urgent);
+        }
         list_free(cont->children);
         cont->children = NULL;
         free(cont);
@@ -339,7 +348,7 @@ struct sway_container *container_view_create(struct sway_container *sibling,
                 swayc, title, sibling, sibling ? sibling->type : 0, sibling->name);
         // Setup values
         swayc->sway_view = sway_view;
-        swayc->name = title ? strdup(title) : NULL;
+        container_update_title(swayc, title ? title : "");
         swayc->width = 0;
         swayc->height = 0;
 
@@ -546,3 +555,115 @@ void container_damage_whole(struct sway_container *con) {
         }
         output_damage_whole_container(output->sway_output, con);
 }
+
+static void update_title_texture(struct sway_container *con,
+                struct wlr_texture **texture, struct border_colors *class) {
+        if (!sway_assert(con->type == C_CONTAINER || con->type == C_VIEW,
+                        "Unexpected type %s", container_type_to_str(con->type))) {
+                return;
+        }
+        if (!con->width) {
+                return;
+        }
+        struct sway_container *output = container_parent(con, C_OUTPUT);
+        if (!output) {
+                return;
+        }
+        if (*texture) {
+                wlr_texture_destroy(*texture);
+        }
+        if (!con->name) {
+                return;
+        }
+
+        int width = con->width * output->sway_output->wlr_output->scale;
+        int height = config->font_height * output->sway_output->wlr_output->scale;
+
+        cairo_surface_t *surface = cairo_image_surface_create(
+                        CAIRO_FORMAT_ARGB32, width, height);
+        cairo_t *cairo = cairo_create(surface);
+        cairo_set_source_rgba(cairo, class->background[0], class->background[1],
+                        class->background[2], class->background[3]);
+        cairo_paint(cairo);
+        PangoContext *pango = pango_cairo_create_context(cairo);
+        cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
+        cairo_set_source_rgba(cairo, class->text[0], class->text[1],
+                        class->text[2], class->text[3]);
+        cairo_move_to(cairo, 0, 0);
+
+        pango_printf(cairo, config->font, output->sway_output->wlr_output->scale,
+                        false, "%s", con->name);
+
+        cairo_surface_flush(surface);
+        unsigned char *data = cairo_image_surface_get_data(surface);
+        int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
+        struct wlr_renderer *renderer = wlr_backend_get_renderer(
+                        output->sway_output->wlr_output->backend);
+        *texture = wlr_texture_from_pixels(
+                        renderer, WL_SHM_FORMAT_ARGB8888, stride, width, height, data);
+        cairo_surface_destroy(surface);
+        g_object_unref(pango);
+        cairo_destroy(cairo);
+}
+
+void container_update_title_textures(struct sway_container *container) {
+        update_title_texture(container, &container->title_focused,
+                        &config->border_colors.focused);
+        update_title_texture(container, &container->title_focused_inactive,
+                        &config->border_colors.focused_inactive);
+        update_title_texture(container, &container->title_unfocused,
+                        &config->border_colors.unfocused);
+        update_title_texture(container, &container->title_urgent,
+                        &config->border_colors.urgent);
+}
+
+void container_calculate_title_height(struct sway_container *container) {
+        if (!container->name) {
+                container->title_height = 0;
+                return;
+        }
+        cairo_t *cairo = cairo_create(NULL);
+        int height;
+        get_text_size(cairo, config->font, NULL, &height, 1, false,
+                        "%s", container->name);
+        cairo_destroy(cairo);
+        container->title_height = height;
+}
+
+static void container_notify_child_title_changed(
+                struct sway_container *container) {
+        if (!container || container->type != C_CONTAINER) {
+                return;
+        }
+        if (container->layout != L_TABBED && container->layout != L_STACKED) {
+                return;
+        }
+        if (container->name) {
+                free(container->name);
+        }
+        // TODO: iterate children and concatenate their titles
+        container->name = strdup("");
+        container_calculate_title_height(container);
+        container_update_title_textures(container);
+        container_notify_child_title_changed(container->parent);
+}
+
+void container_update_title(struct sway_container *container,
+                const char *new_title) {
+        if (container->name && strcmp(container->name, new_title) == 0) {
+                return;
+        }
+        if (container->name) {
+                free(container->name);
+        }
+        container->name = strdup(new_title);
+        container_calculate_title_height(container);
+        container_update_title_textures(container);
+        container_notify_child_title_changed(container->parent);
+
+        size_t prev_max_height = config->font_height;
+        config_find_font_height(false);
+        if (config->font_height != prev_max_height) {
+                arrange_root();
+        }
+}