Change lightness of decorations based on window focus

Author: serebit

src/decorations/ssd.cpp

@@ -4,11 +4,13 @@
 #include "server.hpp"
 
 constexpr uint8_t TITLEBAR_HEIGHT = 24;
-constexpr uint32_t TITLEBAR_COLOR = 0x303030;
+constexpr uint32_t TITLEBAR_ACTIVE_COLOR = 0x303030;
+constexpr uint32_t TITLEBAR_INACTIVE_COLOR = 0x202020;
 constexpr uint8_t BORDER_WIDTH = 1;
-constexpr uint32_t BORDER_COLOR = 0x505050;
+constexpr uint32_t BORDER_ACTIVE_COLOR = 0x505050;
+constexpr uint32_t BORDER_INACTIVE_COLOR = 0x404040;
 
-static consteval std::array<float, 4> rrggbb_to_floats(uint32_t rrggbb) {
+static constexpr std::array<float, 4> rrggbb_to_floats(uint32_t rrggbb) {
 	return std::array<float, 4>(
 		{(float) (rrggbb >> 16 & 0xff) / 255.0f, (float) (rrggbb >> 8 & 0xff) / 255.0f, (float) (rrggbb & 0xff) / 255.0f, 1.0});
 }
@@ -19,15 +21,15 @@ Ssd::Ssd(View& parent) noexcept : view(parent) {
 	wlr_scene_node_set_position(&scene_tree->node, 0, 0);
 	wlr_scene_node_set_enabled(&scene_tree->node, true);
 
-	auto titlebar_color = rrggbb_to_floats(TITLEBAR_COLOR);
+	auto titlebar_color = rrggbb_to_floats(TITLEBAR_INACTIVE_COLOR);
 	auto view_geo = view.get_surface_geometry();
 	titlebar_rect = wlr_scene_rect_create(scene_tree, view_geo.width, TITLEBAR_HEIGHT, titlebar_color.data());
 	titlebar_rect->node.data = &parent;
 	wlr_scene_node_set_position(&titlebar_rect->node, BORDER_WIDTH, BORDER_WIDTH);
 	wlr_scene_node_lower_to_bottom(&titlebar_rect->node);
 	wlr_scene_node_set_enabled(&titlebar_rect->node, true);
 
-	auto border_color = rrggbb_to_floats(BORDER_COLOR);
+	auto border_color = rrggbb_to_floats(BORDER_INACTIVE_COLOR);
 	border_rect = wlr_scene_rect_create(
 		scene_tree, view_geo.width + get_extra_width(), view_geo.height + get_extra_height(), border_color.data());
 	wlr_scene_node_set_position(&border_rect->node, 0, 0);
@@ -45,6 +47,14 @@ void Ssd::update() const {
 	wlr_scene_rect_set_size(border_rect, view_geo.width + get_extra_width(), view_geo.height + get_extra_height());
 }
 
+void Ssd::set_activated(const bool activated) const {
+	auto titlebar_color = rrggbb_to_floats(activated ? TITLEBAR_ACTIVE_COLOR : TITLEBAR_INACTIVE_COLOR);
+	wlr_scene_rect_set_color(titlebar_rect, titlebar_color.data());
+
+	auto border_color = rrggbb_to_floats(activated ? BORDER_ACTIVE_COLOR : BORDER_INACTIVE_COLOR);
+	wlr_scene_rect_set_color(border_rect, border_color.data());
+}
+
 wlr_box Ssd::get_geometry() const {
 	auto view_geo = view.get_surface_geometry();
 	return {.x = view_geo.x - get_horizontal_offset(),

src/decorations/ssd.hpp

@@ -20,8 +20,9 @@ class Ssd final : public std::enable_shared_from_this<Ssd> {
 	~Ssd();
 
 	void update() const;
-	wlr_box get_geometry() const;
+	void set_activated(bool activated) const;
 
+	wlr_box get_geometry() const;
 	uint8_t get_vertical_offset() const;
 	uint8_t get_horizontal_offset() const;
 	int32_t get_extra_width() const;

src/surface/view.cpp

@@ -249,6 +249,10 @@ void View::set_activated(const bool activated) {
 		toplevel_handle->set_activated(activated);
 	}
 
+	if (ssd.has_value()) {
+		ssd->set_activated(activated);
+	}
+
 	const auto seat = get_server().seat;
 	if (activated) {
 		wlr_scene_node_raise_to_top(&scene_tree->node);