Fix wlr_cursor_destroy, handle device remove in examples/multi-cursor

examples/multi-pointer.c

@@ -134,6 +134,7 @@ static void handle_input_add(struct compositor_state *state,
 
 	struct sample_cursor *cursor = calloc(1, sizeof(struct sample_cursor));
 	cursor->state = sample;
+	cursor->device = device;
 
 	cursor->cursor = wlr_cursor_create();
 	wlr_cursor_attach_output_layout(cursor->cursor, sample->layout);
@@ -156,6 +157,22 @@ static void handle_input_add(struct compositor_state *state,
 	wl_list_insert(&sample->cursors, &cursor->link);
 }
 
+static void handle_input_remove(struct compositor_state *state,
+		struct wlr_input_device *device) {
+	struct sample_state *sample = state->data;
+	struct sample_cursor *cursor;
+	wl_list_for_each(cursor, &sample->cursors, link) {
+		if (cursor->device == device) {
+			wl_list_remove(&cursor->link);
+			wl_list_remove(&cursor->cursor_motion.link);
+			wl_list_remove(&cursor->cursor_motion_absolute.link);
+			wlr_cursor_destroy(cursor->cursor);
+			free(cursor);
+			break;
+		}
+	}
+}
+
 int main(int argc, char *argv[]) {
 	struct sample_state state = {
 		.default_color = { 0.25f, 0.25f, 0.25f, 1 },
@@ -173,6 +190,7 @@ int main(int argc, char *argv[]) {
 	compositor.output_remove_cb = handle_output_remove;
 	compositor.output_frame_cb = handle_output_frame;
 	compositor.input_add_cb = handle_input_add;
+	compositor.input_remove_cb = handle_input_remove;
 
 	state.compositor = &compositor;
 

types/wlr_cursor.c

@@ -129,13 +129,36 @@ static void wlr_cursor_detach_output_layout(struct wlr_cursor *cur) {
 	cur->state->layout = NULL;
 }
 
+static void wlr_cursor_device_destroy(struct wlr_cursor_device *c_device) {
+	struct wlr_input_device *dev = c_device->device;
+	if (dev->type == WLR_INPUT_DEVICE_POINTER) {
+		wl_list_remove(&c_device->motion.link);
+		wl_list_remove(&c_device->motion_absolute.link);
+		wl_list_remove(&c_device->button.link);
+		wl_list_remove(&c_device->axis.link);
+	} else if (dev->type == WLR_INPUT_DEVICE_TOUCH) {
+		wl_list_remove(&c_device->touch_down.link);
+		wl_list_remove(&c_device->touch_up.link);
+		wl_list_remove(&c_device->touch_motion.link);
+		wl_list_remove(&c_device->touch_cancel.link);
+	} else if (dev->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
+		wl_list_remove(&c_device->tablet_tool_axis.link);
+		wl_list_remove(&c_device->tablet_tool_proximity.link);
+		wl_list_remove(&c_device->tablet_tool_tip.link);
+		wl_list_remove(&c_device->tablet_tool_button.link);
+	}
+
+	wl_list_remove(&c_device->link);
+	wl_list_remove(&c_device->destroy.link);
+	free(c_device);
+}
+
 void wlr_cursor_destroy(struct wlr_cursor *cur) {
 	wlr_cursor_detach_output_layout(cur);
 
 	struct wlr_cursor_device *device, *device_tmp = NULL;
 	wl_list_for_each_safe(device, device_tmp, &cur->state->devices, link) {
-		wl_list_remove(&device->link);
-		free(device);
+		wlr_cursor_device_destroy(device);
 	}
 
 	free(cur);
@@ -474,30 +497,6 @@ void wlr_cursor_attach_input_device(struct wlr_cursor *cur,
 	wlr_cursor_device_create(cur, dev);
 }
 
-static void wlr_cursor_device_destroy(struct wlr_cursor_device *c_device) {
-	struct wlr_input_device *dev = c_device->device;
-	if (dev->type == WLR_INPUT_DEVICE_POINTER) {
-		wl_list_remove(&c_device->motion.link);
-		wl_list_remove(&c_device->motion_absolute.link);
-		wl_list_remove(&c_device->button.link);
-		wl_list_remove(&c_device->axis.link);
-	} else if (dev->type == WLR_INPUT_DEVICE_TOUCH) {
-		wl_list_remove(&c_device->touch_down.link);
-		wl_list_remove(&c_device->touch_up.link);
-		wl_list_remove(&c_device->touch_motion.link);
-		wl_list_remove(&c_device->touch_cancel.link);
-	} else if (dev->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
-		wl_list_remove(&c_device->tablet_tool_axis.link);
-		wl_list_remove(&c_device->tablet_tool_proximity.link);
-		wl_list_remove(&c_device->tablet_tool_tip.link);
-		wl_list_remove(&c_device->tablet_tool_button.link);
-	}
-
-	wl_list_remove(&c_device->link);
-	wl_list_remove(&c_device->destroy.link);
-	free(c_device);
-}
-
 void wlr_cursor_detach_input_device(struct wlr_cursor *cur,
 		struct wlr_input_device *dev) {
 	struct wlr_cursor_device *c_device, *tmp = NULL;