Use wl_list for touch points in examples/

2 files changed, 32 insertions, 30 deletions

diff --git a/examples/pointer.c b/examples/pointer.c
index 8fafb3d6..f75e1bce 100644
--- a/examples/pointer.c
+++ b/examples/pointer.c
@@ -46,7 +46,7 @@ struct sample_state {
 	struct wl_listener touch_up;
 	struct wl_listener touch_down;
 	struct wl_listener touch_cancel;
-	struct wlr_list *touch_points;
+	struct wl_list touch_points;
 
 	struct wl_listener tablet_tool_axis;
 	struct wl_listener tablet_tool_proxmity;
@@ -57,22 +57,25 @@ struct sample_state {
 struct touch_point {
 	int32_t touch_id;
 	double x, y;
+	struct wl_list link;
 };
 
 static void warp_to_touch(struct sample_state *sample,
 		struct wlr_input_device *dev) {
-	if (sample->touch_points->length == 0) {
+	if (wl_list_empty(&sample->touch_points)) {
 		return;
 	}
 
 	double x = 0, y = 0;
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *point = sample->touch_points->items[i];
+	size_t n = 0;
+	struct touch_point *point;
+	wl_list_for_each(point, &sample->touch_points, link) {
 		x += point->x;
 		y += point->y;
+		n++;
 	}
-	x /= sample->touch_points->length;
-	y /= sample->touch_points->length;
+	x /= n;
+	y /= n;
 	wlr_cursor_warp_absolute(sample->cursor, dev, x, y);
 }
 
@@ -197,10 +200,11 @@ static void handle_cursor_axis(struct wl_listener *listener, void *data) {
 static void handle_touch_up(struct wl_listener *listener, void *data) {
 	struct sample_state *sample = wl_container_of(listener, sample, touch_up);
 	struct wlr_event_touch_up *event = data;
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *point = sample->touch_points->items[i];
+
+	struct touch_point *point, *tmp;
+	wl_list_for_each_safe(point, tmp, &sample->touch_points, link) {
 		if (point->touch_id == event->touch_id) {
-			wlr_list_del(sample->touch_points, i);
+			wl_list_remove(&point->link);
 			break;
 		}
 	}
@@ -215,9 +219,7 @@ static void handle_touch_down(struct wl_listener *listener, void *data) {
 	point->touch_id = event->touch_id;
 	point->x = event->x_mm / event->width_mm;
 	point->y = event->y_mm / event->height_mm;
-	if (wlr_list_add(sample->touch_points, point) == -1) {
-		free(point);
-	}
+	wl_list_insert(&sample->touch_points, &point->link);
 
 	warp_to_touch(sample, event->device);
 }
@@ -226,8 +228,9 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	struct sample_state *sample =
 		wl_container_of(listener, sample, touch_motion);
 	struct wlr_event_touch_motion *event = data;
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *point = sample->touch_points->items[i];
+
+	struct touch_point *point;
+	wl_list_for_each(point, &sample->touch_points, link) {
 		if (point->touch_id == event->touch_id) {
 			point->x = event->x_mm / event->width_mm;
 			point->y = event->y_mm / event->height_mm;
@@ -257,7 +260,6 @@ int main(int argc, char *argv[]) {
 	struct sample_state state = {
 		.default_color = { 0.25f, 0.25f, 0.25f, 1 },
 		.clear_color = { 0.25f, 0.25f, 0.25f, 1 },
-		.touch_points = wlr_list_create(),
 	};
 
 	state.config = parse_args(argc, argv);
@@ -266,6 +268,7 @@ int main(int argc, char *argv[]) {
 	wlr_cursor_attach_output_layout(state.cursor, state.layout);
 	wlr_cursor_map_to_region(state.cursor, state.config->cursor.mapped_box);
 	wl_list_init(&state.devices);
+	wl_list_init(&state.touch_points);
 
 	// pointer events
 	wl_signal_add(&state.cursor->events.motion, &state.cursor_motion);
diff --git a/examples/touch.c b/examples/touch.c
index d1891525..f18b5d26 100644
--- a/examples/touch.c
+++ b/examples/touch.c
@@ -24,12 +24,13 @@
 struct sample_state {
 	struct wlr_renderer *renderer;
 	struct wlr_texture *cat_texture;
-	struct wlr_list *touch_points;
+	struct wl_list touch_points;
 };
 
 struct touch_point {
 	int32_t touch_id;
 	double x, y;
+	struct wl_list link;
 };
 
 static void handle_output_frame(struct output_state *output, struct timespec *ts) {
@@ -44,14 +45,14 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 	wlr_renderer_begin(sample->renderer, wlr_output);
 
 	float matrix[16];
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *p = sample->touch_points->items[i];
+	struct touch_point *p;
+	wl_list_for_each(p, &sample->touch_points, link) {
 		wlr_texture_get_matrix(sample->cat_texture, &matrix,
 			&wlr_output->transform_matrix,
 			(int)(p->x * width) - sample->cat_texture->width / 2,
 			(int)(p->y * height) - sample->cat_texture->height / 2);
 		wlr_render_with_matrix(sample->renderer,
-				sample->cat_texture, &matrix);
+			sample->cat_texture, &matrix);
 	}
 
 	wlr_renderer_end(sample->renderer);
@@ -65,17 +66,15 @@ static void handle_touch_down(struct touch_state *tstate, int32_t touch_id,
 	point->touch_id = touch_id;
 	point->x = x / width;
 	point->y = y / height;
-	if (wlr_list_add(sample->touch_points, point) == -1) {
-		free(point);
-	}
+	wl_list_insert(&sample->touch_points, &point->link);
 }
 
 static void handle_touch_up(struct touch_state *tstate, int32_t touch_id) {
 	struct sample_state *sample = tstate->compositor->data;
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *point = sample->touch_points->items[i];
+	struct touch_point *point, *tmp;
+	wl_list_for_each_safe(point, tmp, &sample->touch_points, link) {
 		if (point->touch_id == touch_id) {
-			wlr_list_del(sample->touch_points, i);
+			wl_list_remove(&point->link);
 			break;
 		}
 	}
@@ -84,8 +83,8 @@ static void handle_touch_up(struct touch_state *tstate, int32_t touch_id) {
 static void handle_touch_motion(struct touch_state *tstate, int32_t touch_id,
 		double x, double y, double width, double height) {
 	struct sample_state *sample = tstate->compositor->data;
-	for (size_t i = 0; i < sample->touch_points->length; ++i) {
-		struct touch_point *point = sample->touch_points->items[i];
+	struct touch_point *point;
+	wl_list_for_each(point, &sample->touch_points, link) {
 		if (point->touch_id == touch_id) {
 			point->x = x / width;
 			point->y = y / height;
@@ -95,9 +94,9 @@ static void handle_touch_motion(struct touch_state *tstate, int32_t touch_id,
 }
 
 int main(int argc, char *argv[]) {
-	struct sample_state state = {
-		.touch_points = wlr_list_create()
-	};
+	struct sample_state state;
+	wl_list_init(&state.touch_points);
+
 	struct compositor_state compositor = { 0,
 		.data = &state,
 		.output_frame_cb = handle_output_frame,