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

1 files changed, 15 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;
+                }
+        }
+}