terminal: Only add the new size to the title when we're resizing

Add a new state_changed_handler callback to the window to know when the
window has changed state; the terminal will use this to know when the
window started and ended its resize operation, and modify the terminal's
titlebar accordingly.

clients/terminal.c

@@ -833,13 +833,27 @@ terminal_resize_cells(struct terminal *terminal,
 	ioctl(terminal->master, TIOCSWINSZ, &ws);
 }
 
+static void
+update_title(struct terminal *terminal)
+{
+	if (window_is_resizing(terminal->window)) {
+		char *p;
+		if (asprintf(&p, "%s — [%dx%d]", terminal->title, terminal->width, terminal->height) > 0) {
+			window_set_title(terminal->window, p);
+			free(p);
+		}
+	} else {
+		window_set_title(terminal->window, terminal->title);
+	}
+}
+
 static void
 resize_handler(struct widget *widget,
 	       int32_t width, int32_t height, void *data)
 {
 	struct terminal *terminal = data;
 	int32_t columns, rows, m;
-	char *p;
+
 	m = 2 * terminal->margin;
 	columns = (width - m) / (int32_t) terminal->average_width;
 	rows = (height - m) / (int32_t) terminal->extents.height;
@@ -849,14 +863,17 @@ resize_handler(struct widget *widget,
 		width = columns * terminal->average_width + m;
 		height = rows * terminal->extents.height + m;
 		widget_set_size(terminal->widget, width, height);
-		if (asprintf(&p, "%s — [%dx%d]", terminal->title, columns, rows) > 0) {
-		    window_set_title(terminal->window, p);
-		    terminal->size_in_title = 1;
-		    free(p);
-		}
 	}
 
 	terminal_resize_cells(terminal, columns, rows);
+	update_title(terminal);
+}
+
+static void
+state_changed_handler(struct window *window, void *data)
+{
+	struct terminal *terminal = data;
+	update_title(terminal);
 }
 
 static void
@@ -2745,14 +2762,6 @@ static int
 enter_handler(struct widget *widget,
 	      struct input *input, float x, float y, void *data)
 {
-	struct terminal *terminal = data;
-
-	/* Reset title to get rid of resizing '[WxH]' in titlebar */
-	if (terminal->size_in_title) {
-		window_set_title(terminal->window, terminal->title);
-		terminal->size_in_title = 0;
-	}
-
 	return CURSOR_IBEAM;
 }
 
@@ -2860,6 +2869,7 @@ terminal_create(struct display *display)
 	window_set_fullscreen_handler(terminal->window, fullscreen_handler);
 	window_set_output_handler(terminal->window, output_handler);
 	window_set_close_handler(terminal->window, close_handler);
+	window_set_state_changed_handler(terminal->window, state_changed_handler);
 
 	window_set_data_handler(terminal->window, data_handler);
 	window_set_drop_handler(terminal->window, drop_handler);

clients/window.c

@@ -241,6 +241,7 @@ struct window {
 	window_close_handler_t close_handler;
 	window_fullscreen_handler_t fullscreen_handler;
 	window_output_handler_t output_handler;
+	window_state_changed_handler_t state_changed_handler;
 
 	struct surface *main_surface;
 	struct xdg_surface *xdg_surface;
@@ -3887,6 +3888,9 @@ handle_surface_configure(void *data, struct xdg_surface *xdg_surface,
 	}
 
 	window->next_attach_serial = serial;
+
+	if (window->state_changed_handler)
+		window->state_changed_handler(window, window->user_data);
 }
 
 static void
@@ -4178,6 +4182,12 @@ window_set_maximized(struct window *window, int maximized)
 		xdg_surface_unset_maximized(window->xdg_surface);
 }
 
+int
+window_is_resizing(struct window *window)
+{
+	return window->resizing;
+}
+
 void
 window_set_minimized(struct window *window)
 {
@@ -4246,6 +4256,13 @@ window_set_output_handler(struct window *window,
 	window->output_handler = handler;
 }
 
+void
+window_set_state_changed_handler(struct window *window,
+				 window_state_changed_handler_t handler)
+{
+	window->state_changed_handler = handler;
+}
+
 void
 window_set_title(struct window *window, const char *title)
 {

clients/window.h

@@ -219,6 +219,8 @@ typedef void (*window_fullscreen_handler_t)(struct window *window, void *data);
 
 typedef void (*window_output_handler_t)(struct window *window, struct output *output,
 					int enter, void *data);
+typedef void (*window_state_changed_handler_t)(struct window *window,
+					       void *data);
 
 typedef void (*widget_resize_handler_t)(struct widget *widget,
 					int32_t width, int32_t height,
@@ -381,6 +383,9 @@ window_is_maximized(struct window *window);
 void
 window_set_maximized(struct window *window, int maximized);
 
+int
+window_is_resizing(struct window *window);
+
 void
 window_set_minimized(struct window *window);
 
@@ -415,6 +420,9 @@ window_set_fullscreen_handler(struct window *window,
 void
 window_set_output_handler(struct window *window,
 			  window_output_handler_t handler);
+void
+window_set_state_changed_handler(struct window *window,
+				 window_state_changed_handler_t handler);
 
 void
 window_set_title(struct window *window, const char *title);