From 258f16752800b672061d910854a446903bf7e6f4 Mon Sep 17 00:00:00 2001
From: Kirill Primak <vyivel@posteo.net>
Date: Fri, 30 Jul 2021 11:34:10 +0300
Subject: [PATCH] view: add lock/unlock functions

---
 include/sway/tree/view.h |  7 +++++++
 sway/tree/view.c         | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index c404b97a7..bf2f0a789 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -70,6 +70,9 @@ struct sway_view {
 	// Used when changing a view from tiled to floating.
 	int natural_width, natural_height;
 
+	bool surface_locked;
+	uint32_t lock_seq;
+
 	char *title_format;
 
 	bool using_csd;
@@ -341,6 +344,10 @@ void view_set_urgent(struct sway_view *view, bool enable);
 
 bool view_is_urgent(struct sway_view *view);
 
+void view_lock_pending(struct sway_view *view);
+
+void view_unlock_cached(struct sway_view *view);
+
 bool view_is_transient_for(struct sway_view *child, struct sway_view *ancestor);
 
 #endif
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 1aab7f1c9..dcd5a0e78 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -875,6 +875,11 @@ void view_unmap(struct sway_view *view) {
 	}
 
 	transaction_commit_dirty();
+
+	if (view->surface_locked) {
+		view_unlock_cached(view);
+	}
+
 	view->surface = NULL;
 }
 
@@ -1377,3 +1382,17 @@ bool view_is_transient_for(struct sway_view *child,
 	return child->impl->is_transient_for &&
 		child->impl->is_transient_for(child, ancestor);
 }
+
+void view_lock_pending(struct sway_view *view) {
+	sway_assert(!view->surface_locked, "Can't lock a locked view");
+	if (view->surface) {
+		view->surface_locked = true;
+		view->lock_seq = wlr_surface_lock_pending(view->surface);
+	}
+}
+
+void view_unlock_cached(struct sway_view *view) {
+	sway_assert(view->surface_locked, "Can't unlock an unlocked view");
+	view->surface_locked = false;
+	wlr_surface_unlock_cached(view->surface, view->lock_seq);
+}