swaybar: Make hotspots block bar release bindings

The previous commit prioritized hotspots before bar bindings for press events,
which matches i3's behaviour. However, since hotspots don't need to do any
processing on release events, those were not handled, and simply fell through
to `bindsym --release` bar bindings (if any).

This is counter-intuitive, and doesn't match i3's behaviour. Instead in case
a hotspot handles the press event, it should also handle the release event,
doing nothing, but blocking the event from triggering a --release bar binding.

E.g., in Sway, without this commit, this config. shows a text on tray clicks:

    bar {
        # ...
        bindsym --release button1 exec swaynag -m I_got_the_release_event.
    }

But the same configuration in i3 (with i3-nagbar) doesn't show the text.

Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com>

include/swaybar/i3bar.h

@@ -30,6 +30,6 @@ void i3bar_block_unref(struct i3bar_block *block);
 bool i3bar_handle_readable(struct status_line *status);
 enum hotspot_event_handling i3bar_block_send_click(struct status_line *status,
 		struct i3bar_block *block, double x, double y, double rx, double ry,
-		double w, double h, int scale, uint32_t button);
+		double w, double h, int scale, uint32_t button, bool released);
 
 #endif

include/swaybar/input.h

@@ -49,7 +49,7 @@ struct swaybar_hotspot {
 	int x, y, width, height;
 	enum hotspot_event_handling (*callback)(struct swaybar_output *output,
 		struct swaybar_hotspot *hotspot, double x, double y, uint32_t button,
-		void *data);
+		bool released, void *data);
 	void (*destroy)(void *data);
 	void *data;
 };

swaybar/i3bar.c

@@ -269,11 +269,16 @@ bool i3bar_handle_readable(struct status_line *status) {
 
 enum hotspot_event_handling i3bar_block_send_click(struct status_line *status,
 		struct i3bar_block *block, double x, double y, double rx, double ry,
-		double w, double h, int scale, uint32_t button) {
+		double w, double h, int scale, uint32_t button, bool released) {
 	sway_log(SWAY_DEBUG, "block %s clicked", block->name);
 	if (!block->name || !status->click_events) {
 		return HOTSPOT_PROCESS;
 	}
+	if (released) {
+		// Since we handle the pressed event, also handle the released event
+		// to block it from falling through to a binding in the bar
+		return HOTSPOT_IGNORE;
+	}
 
 	struct json_object *event_json = json_object_new_object();
 	json_object_object_add(event_json, "name",

swaybar/input.c

@@ -141,14 +141,15 @@ static bool check_bindings(struct swaybar *bar, uint32_t button,
 }
 
 static bool process_hotspots(struct swaybar_output *output,
-		double x, double y, uint32_t button) {
+		double x, double y, uint32_t button, uint32_t state) {
+	bool released = state == WL_POINTER_BUTTON_STATE_RELEASED;
 	struct swaybar_hotspot *hotspot;
 	wl_list_for_each(hotspot, &output->hotspots, link) {
 		if (x >= hotspot->x && y >= hotspot->y
 				&& x < hotspot->x + hotspot->width
 				&& y < hotspot->y + hotspot->height) {
 			if (HOTSPOT_IGNORE == hotspot->callback(output, hotspot, x, y,
-					button, hotspot->data)) {
+					button, released, hotspot->data)) {
 				return true;
 			}
 		}
@@ -166,11 +167,9 @@ static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
 		return;
 	}
 
-	if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
+	if (process_hotspots(output, pointer->x, pointer->y, button, state)) {
-		if (process_hotspots(output, pointer->x, pointer->y, button)) {
 		return;
 	}
-	}
 
 	check_bindings(seat->bar, button, state);
 }
@@ -222,7 +221,8 @@ static void process_discrete_scroll(struct swaybar_seat *seat,
 		struct swaybar_output *output, struct swaybar_pointer *pointer,
 		uint32_t axis, wl_fixed_t value) {
 	uint32_t button = wl_axis_to_button(axis, value);
-	if (process_hotspots(output, pointer->x, pointer->y, button)) {
+	if (process_hotspots(output, pointer->x, pointer->y, button, WL_POINTER_BUTTON_STATE_PRESSED)) {
+		// (Currently hotspots don't do anything on release events, so no need to emit one)
 		return;
 	}
 
@@ -401,7 +401,8 @@ static void wl_touch_up(void *data, struct wl_touch *wl_touch,
 	}
 	if (time - slot->time < 500) {
 		// Tap, treat it like a pointer click
-		process_hotspots(slot->output, slot->x, slot->y, BTN_LEFT);
+		process_hotspots(slot->output, slot->x, slot->y, BTN_LEFT, WL_POINTER_BUTTON_STATE_PRESSED);
+		// (Currently hotspots don't do anything on release events, so no need to emit one)
 	}
 	slot->output = NULL;
 }

swaybar/render.c

@@ -160,7 +160,7 @@ static void render_sharp_line(cairo_t *cairo, uint32_t color,
 
 static enum hotspot_event_handling block_hotspot_callback(
 		struct swaybar_output *output, struct swaybar_hotspot *hotspot,
-		double x, double y, uint32_t button, void *data) {
+		double x, double y, uint32_t button, bool released, void *data) {
 	struct i3bar_block *block = data;
 	struct status_line *status = output->bar->status;
 	return i3bar_block_send_click(status, block, x, y,
@@ -168,7 +168,7 @@ static enum hotspot_event_handling block_hotspot_callback(
 			y - (double)hotspot->y,
 			(double)hotspot->width,
 			(double)hotspot->height,
-			output->scale, button);
+			output->scale, button, released);
 }
 
 static void i3bar_block_unref_callback(void *data) {
@@ -599,10 +599,15 @@ static uint32_t render_binding_mode_indicator(struct render_context *ctx,
 
 static enum hotspot_event_handling workspace_hotspot_callback(
 		struct swaybar_output *output, struct swaybar_hotspot *hotspot,
-		double x, double y, uint32_t button, void *data) {
+		double x, double y, uint32_t button, bool released, void *data) {
 	if (button != BTN_LEFT) {
 		return HOTSPOT_PROCESS;
 	}
+	if (released) {
+		// Since we handle the pressed event, also handle the released event
+		// to block it from falling through to a binding in the bar
+		return HOTSPOT_IGNORE;
+	}
 	ipc_send_workspace_command(output->bar, (const char *)data);
 	return HOTSPOT_IGNORE;
 }

swaybar/tray/item.c

@@ -385,13 +385,18 @@ static int cmp_sni_id(const void *item, const void *cmp_to) {
 
 static enum hotspot_event_handling icon_hotspot_callback(
 		struct swaybar_output *output, struct swaybar_hotspot *hotspot,
-		double x, double y, uint32_t button, void *data) {
+		double x, double y, uint32_t button, bool released, void *data) {
 	sway_log(SWAY_DEBUG, "Clicked on %s", (char *)data);
 
 	struct swaybar_tray *tray = output->bar->tray;
 	int idx = list_seq_find(tray->items, cmp_sni_id, data);
 
 	if (idx != -1) {
+		if (released) {
+			// Since we handle the pressed event, also handle the released event
+			// to block it from falling through to a binding in the bar
+			return HOTSPOT_IGNORE;
+		}
 		struct swaybar_sni *sni = tray->items->items[idx];
 		// guess global position since wayland doesn't expose it
 		struct swaybar_config *config = tray->bar->config;