Implement mousedown operation

This allows you to move the cursor off the surface while dragging its
scrollbar.

1 files changed, 23 insertions, 0 deletions

diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 3b70b471..bd0030f0 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -215,6 +215,18 @@ static enum wlr_edges find_resize_edge(struct sway_container *cont,
 	return edge;
 }
 
+static void handle_mousedown_motion(struct sway_seat *seat,
+		struct sway_cursor *cursor, uint32_t time_msec) {
+	struct sway_container *con = seat->op_container;
+	if (seat_is_input_allowed(seat, con->sway_view->surface)) {
+		double moved_x = cursor->cursor->x - seat->op_ref_lx;
+		double moved_y = cursor->cursor->y - seat->op_ref_ly;
+		double sx = seat->op_ref_con_lx + moved_x;
+		double sy = seat->op_ref_con_ly + moved_y;
+		wlr_seat_pointer_notify_motion(seat->wlr_seat, time_msec, sx, sy);
+	}
+}
+
 static void handle_move_motion(struct sway_seat *seat,
 		struct sway_cursor *cursor) {
 	struct sway_container *con = seat->op_container;
@@ -397,6 +409,9 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 
 	if (seat->operation != OP_NONE) {
 		switch (seat->operation) {
+		case OP_MOUSEDOWN:
+			handle_mousedown_motion(seat, cursor, time_msec);
+			break;
 		case OP_MOVE:
 			handle_move_motion(seat, cursor);
 			break;
@@ -743,6 +758,14 @@ void dispatch_cursor_button(struct sway_cursor *cursor,
 		}
 	}
 
+	// Handle mousedown on a container surface
+	if (surface && cont && state == WLR_BUTTON_PRESSED) {
+		seat_set_focus(seat, cont);
+		seat_pointer_notify_button(seat, time_msec, button, state);
+		seat_begin_mousedown(seat, cont, button, sx, sy);
+		return;
+	}
+
 	// Handle clicking a container surface
 	if (cont) {
 		seat_set_focus(seat, cont);