Implement floating_modifier and mouse operations for floating views

This implements the following:

* `floating_modifier` configuration directive
* Drag a floating window by its title bar
* Hold mod + drag a floating window from anywhere
* Resize a floating view by dragging the border
* Resize a floating view by holding mod and right clicking anywhere on
the view
* Resize a floating view and keep aspect ratio by holding shift while
resizing using either method
* Mouse cursor turns into resize when hovering floating border or corner

3 files changed, 18 insertions, 1 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index 4dbfbb29..ba4af352 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -323,6 +323,8 @@ static struct sway_container *container_destroy_noreaping(
 		}
 	}
 
+	container_end_mouse_operation(con);
+
 	con->destroying = true;
 	container_set_dirty(con);
 
@@ -964,6 +966,8 @@ void container_set_floating(struct sway_container *container, bool enable) {
 		container_reap_empty_recursive(workspace->sway_workspace->floating);
 	}
 
+	container_end_mouse_operation(container);
+
 	ipc_event_window(container, "floating");
 }
 
@@ -1009,7 +1013,7 @@ void container_get_box(struct sway_container *container, struct wlr_box *box) {
 /**
  * Translate the container's position as well as all children.
  */
-static void container_floating_translate(struct sway_container *con,
+void container_floating_translate(struct sway_container *con,
 		double x_amount, double y_amount) {
 	con->x += x_amount;
 	con->y += y_amount;
@@ -1105,3 +1109,13 @@ static bool find_urgent_iterator(struct sway_container *con,
 bool container_has_urgent_child(struct sway_container *container) {
 	return container_find(container, find_urgent_iterator, NULL);
 }
+
+void container_end_mouse_operation(struct sway_container *container) {
+	struct sway_seat *seat;
+	wl_list_for_each(seat, &input_manager->seats, link) {
+		if (seat->op_container == container) {
+			seat->op_container = NULL;
+			seat->operation = OP_NONE;
+		}
+	}
+}
diff --git a/sway/tree/layout.c b/sway/tree/layout.c
index 1f898f8a..533906fa 100644
--- a/sway/tree/layout.c
+++ b/sway/tree/layout.c
@@ -562,6 +562,7 @@ void container_move(struct sway_container *container,
 		workspace_detect_urgent(last_ws);
 		workspace_detect_urgent(next_ws);
 	}
+	container_end_mouse_operation(container);
 }
 
 enum sway_container_layout container_get_default_layout(
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 7881e6d7..24594950 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -387,6 +387,8 @@ void view_set_fullscreen(struct sway_view *view, bool fullscreen) {
 		}
 	}
 
+	container_end_mouse_operation(view->swayc);
+
 	ipc_event_window(view->swayc, "fullscreen_mode");
 }