Paint terminal cursor hollow when focus is lost.

terminal.c

@@ -67,6 +67,7 @@ struct terminal {
 	int state;
 	int margin;
 	int fullscreen;
+	int focused;
 };
 
 static char *
@@ -131,6 +132,7 @@ terminal_draw_contents(struct terminal *terminal)
 	cairo_t *cr;
 	cairo_font_extents_t extents;
 	int i, top_margin, side_margin;
+	double d;
 
 	window_get_child_rectangle(terminal->window, &rectangle);
 
@@ -158,13 +160,20 @@ terminal_draw_contents(struct terminal *terminal)
 		cairo_show_text(cr, terminal_get_row(terminal, i));
 	}
 
-	cairo_move_to(cr, side_margin + terminal->column * extents.max_x_advance,
-		      top_margin + terminal->row * extents.height);
-	cairo_rel_line_to(cr, extents.max_x_advance, 0);
-	cairo_rel_line_to(cr, 0, extents.height);
-	cairo_rel_line_to(cr, -extents.max_x_advance, 0);
+	d = terminal->focused ? 0 : 0.5;
+
+	cairo_set_line_width(cr, 1);
+	cairo_move_to(cr, side_margin + terminal->column * extents.max_x_advance + d,
+		      top_margin + terminal->row * extents.height + d);
+	cairo_rel_line_to(cr, extents.max_x_advance - 2 * d, 0);
+	cairo_rel_line_to(cr, 0, extents.height - 2 * d);
+	cairo_rel_line_to(cr, -extents.max_x_advance + 2 * d, 0);
 	cairo_close_path(cr);
-	cairo_fill(cr);
+
+	if (terminal->focused)
+		cairo_fill(cr);
+	else
+		cairo_stroke(cr);
 
 	cairo_destroy(cr);
 
@@ -449,6 +458,16 @@ key_handler(struct window *window, uint32_t key, uint32_t unicode,
 	}
 }
 
+static void
+keyboard_focus_handler(struct window *window,
+		       struct wl_input_device *device, void *data)
+{
+	struct terminal *terminal = data;
+
+	terminal->focused = (device != NULL);
+	terminal_schedule_redraw(terminal);
+}
+
 static struct terminal *
 terminal_create(struct display *display, int fullscreen)
 {
@@ -474,6 +493,8 @@ terminal_create(struct display *display, int fullscreen)
 				   &compositor_listener, terminal);
 
 	window_set_key_handler(terminal->window, key_handler, terminal);
+	window_set_keyboard_focus_handler(terminal->window,
+					  keyboard_focus_handler, terminal);
 
 	terminal_draw(terminal);
 

window.c

@@ -59,6 +59,7 @@ struct window {
 	int state;
 	int fullscreen;
 	struct wl_input_device *grab_device;
+	struct wl_input_device *keyboard_device;
 	uint32_t name;
 	uint32_t modifiers;
 
@@ -66,6 +67,7 @@ struct window {
 
 	window_resize_handler_t resize_handler;
 	window_key_handler_t key_handler;
+	window_keyboard_focus_handler_t keyboard_focus_handler;
 	void *user_data;
 };
 
@@ -440,6 +442,9 @@ window_handle_key(void *data, struct wl_input_device *input_device,
 	uint32_t mod = 0;
 	uint32_t unicode = 0;
 
+	if (window->keyboard_device != input_device)
+		return;
+
 	switch (key) {
 	case KEY_LEFTSHIFT:
 	case KEY_RIGHTSHIFT:
@@ -487,6 +492,19 @@ window_handle_keyboard_focus(void *data,
 			     struct wl_input_device *input_device,
 			     struct wl_surface *surface)
 {
+	struct window *window = data;
+
+	if (window->keyboard_device == input_device && surface != window->surface)
+		window->keyboard_device = NULL;
+	else if (window->keyboard_device == NULL && surface == window->surface)
+		window->keyboard_device = input_device;
+	else
+		return;
+
+	if (window->keyboard_focus_handler)
+		(*window->keyboard_focus_handler)(window,
+						  window->keyboard_device,
+						  window->user_data);
 }
 
 static const struct wl_input_device_listener input_device_listener = {
@@ -588,6 +606,14 @@ window_set_key_handler(struct window *window,
 	window->user_data = data;
 }
 
+void
+window_set_keyboard_focus_handler(struct window *window,
+				  window_keyboard_focus_handler_t handler, void *data)
+{
+	window->keyboard_focus_handler = handler;
+	window->user_data = data;
+}
+
 struct window *
 window_create(struct display *display, const char *title,
 	      int32_t x, int32_t y, int32_t width, int32_t height)

window.h

@@ -50,6 +50,8 @@ typedef void (*window_frame_handler_t)(struct window *window, uint32_t frame, ui
 typedef void (*window_acknowledge_handler_t)(struct window *window, uint32_t key, void *data);
 typedef void (*window_key_handler_t)(struct window *window, uint32_t key, uint32_t unicode,
 				     uint32_t state, uint32_t modifiers, void *data);
+typedef void (*window_keyboard_focus_handler_t)(struct window *window,
+						struct wl_input_device *device, void *data);
 
 struct window *
 window_create(struct display *display, const char *title,
@@ -93,4 +95,8 @@ void
 window_set_key_handler(struct window *window,
 		       window_key_handler_t handler, void *data);
 
+void
+window_set_keyboard_focus_handler(struct window *window,
+				  window_keyboard_focus_handler_t handler,
+				  void *data);
 #endif