code: update to wlroots 0.14.0

 README.md              |  2 +-
 deps/zig-wlroots       |  2 +-
 river/DragIcon.zig     |  5 +----
 river/LayerSurface.zig |  5 +----
 river/Subsurface.zig   | 16 ++++++++++++----
 river/XdgPopup.zig     |  5 +----
 river/XdgToplevel.zig  |  5 +----
 7 files changed, 18 insertions(+), 22 deletions(-)

diff --git a/README.md b/README.md
index f94156e..8599441 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ installed:
 - [zig](https://ziglang.org/download/) 0.8.0
 - wayland
 - wayland-protocols
-- [wlroots](https://github.com/swaywm/wlroots) 0.13.0
+- [wlroots](https://github.com/swaywm/wlroots) 0.14.0
 - xkbcommon
 - libevdev
 - pixman
diff --git a/deps/zig-wlroots b/deps/zig-wlroots
index c85fe79..c5f7594 160000
--- a/deps/zig-wlroots
+++ b/deps/zig-wlroots
@@ -1 +1 @@
-Subproject commit c85fe796d932731ead64e916c90fdfc3d1e1269a
+Subproject commit c5f759484ec2bb6afdee54053f5b0aaccf060131
diff --git a/river/DragIcon.zig b/river/DragIcon.zig
index ac2896c..e61d06f 100644
--- a/river/DragIcon.zig
+++ b/river/DragIcon.zig
@@ -47,10 +47,7 @@ pub fn init(drag_icon: *DragIcon, seat: *Seat, wlr_drag_icon: *wlr.Drag.Icon) vo
     wlr_drag_icon.events.unmap.add(&drag_icon.unmap);
     wlr_drag_icon.surface.events.new_subsurface.add(&drag_icon.new_subsurface);
 
-    // There may already be subsurfaces present on this surface that we
-    // aren't aware of and won't receive a new_subsurface event for.
-    var it = wlr_drag_icon.surface.subsurfaces.iterator(.forward);
-    while (it.next()) |s| Subsurface.create(s, .{ .drag_icon = drag_icon });
+    Subsurface.handleExisting(wlr_drag_icon.surface, .{ .drag_icon = drag_icon });
 }
 
 fn handleDestroy(listener: *wl.Listener(*wlr.Drag.Icon), wlr_drag_icon: *wlr.Drag.Icon) void {
diff --git a/river/LayerSurface.zig b/river/LayerSurface.zig
index 5b18991..6f73c4d 100644
--- a/river/LayerSurface.zig
+++ b/river/LayerSurface.zig
@@ -66,10 +66,7 @@ pub fn init(self: *Self, output: *Output, wlr_layer_surface: *wlr.LayerSurfaceV1
     // we do want our listener called in order to send the initial configure.
     handleCommit(&self.commit, wlr_layer_surface.surface);
 
-    // There may already be subsurfaces present on this surface that we
-    // aren't aware of and won't receive a new_subsurface event for.
-    var it = wlr_layer_surface.surface.subsurfaces.iterator(.forward);
-    while (it.next()) |s| Subsurface.create(s, .{ .layer_surface = self });
+    Subsurface.handleExisting(wlr_layer_surface.surface, .{ .layer_surface = self });
 }
 
 fn handleDestroy(listener: *wl.Listener(*wlr.LayerSurfaceV1), wlr_layer_surface: *wlr.LayerSurfaceV1) void {
diff --git a/river/Subsurface.zig b/river/Subsurface.zig
index e52307e..a5ae6e4 100644
--- a/river/Subsurface.zig
+++ b/river/Subsurface.zig
@@ -71,10 +71,18 @@ pub fn create(wlr_subsurface: *wlr.Subsurface, parent: Parent) void {
     wlr_subsurface.events.unmap.add(&subsurface.unmap);
     wlr_subsurface.surface.events.new_subsurface.add(&subsurface.new_subsurface);
 
-    // There may already be subsurfaces present on this surface that we
-    // aren't aware of and won't receive a new_subsurface event for.
-    var it = wlr_subsurface.surface.subsurfaces.iterator(.forward);
-    while (it.next()) |s| Subsurface.create(s, parent);
+    Subsurface.handleExisting(wlr_subsurface.surface, parent);
+}
+
+/// Create Subsurface structs to track subsurfaces already present on the
+/// given surface when river becomes aware of the surface as we won't
+/// recieve a new_subsurface event for them.
+pub fn handleExisting(surface: *wlr.Surface, parent: Parent) void {
+    var below_it = surface.subsurfaces_below.iterator(.forward);
+    while (below_it.next()) |s| Subsurface.create(s, parent);
+
+    var above_it = surface.subsurfaces_above.iterator(.forward);
+    while (above_it.next()) |s| Subsurface.create(s, parent);
 }
 
 fn handleDestroy(listener: *wl.Listener(*wlr.Subsurface), wlr_subsurface: *wlr.Subsurface) void {
diff --git a/river/XdgPopup.zig b/river/XdgPopup.zig
index 8918488..e243b4b 100644
--- a/river/XdgPopup.zig
+++ b/river/XdgPopup.zig
@@ -77,10 +77,7 @@ pub fn create(wlr_xdg_popup: *wlr.XdgPopup, parent: Parent) void {
     wlr_xdg_popup.base.events.new_popup.add(&self.new_popup);
     wlr_xdg_popup.base.surface.events.new_subsurface.add(&self.new_subsurface);
 
-    // There may already be subsurfaces present on this surface that we
-    // aren't aware of and won't receive a new_subsurface event for.
-    var it = wlr_xdg_popup.base.surface.subsurfaces.iterator(.forward);
-    while (it.next()) |s| Subsurface.create(s, parent);
+    Subsurface.handleExisting(wlr_xdg_popup.base.surface, parent);
 }
 
 fn handleDestroy(listener: *wl.Listener(*wlr.XdgSurface), wlr_xdg_surface: *wlr.XdgSurface) void {
diff --git a/river/XdgToplevel.zig b/river/XdgToplevel.zig
index ca360c3..0b9dcaa 100644
--- a/river/XdgToplevel.zig
+++ b/river/XdgToplevel.zig
@@ -68,10 +68,7 @@ pub fn init(self: *Self, view: *View, xdg_surface: *wlr.XdgSurface) void {
     xdg_surface.events.new_popup.add(&self.new_popup);
     xdg_surface.surface.events.new_subsurface.add(&self.new_subsurface);
 
-    // There may already be subsurfaces present on this surface that we
-    // aren't aware of and won't receive a new_subsurface event for.
-    var it = xdg_surface.surface.subsurfaces.iterator(.forward);
-    while (it.next()) |s| Subsurface.create(s, .{ .view = view });
+    Subsurface.handleExisting(xdg_surface.surface, .{ .view = view });
 }
 
 pub fn deinit(self: *Self) void {