From 710e419986b671dbe02021f19e9fe94e0d17ccb3 Mon Sep 17 00:00:00 2001
From: Aylur <k.demeter@protonmail.com>
Date: Wed, 26 Jun 2024 02:20:59 +0200
Subject: feat: widget click through

---
 gjs/src/astalify.ts    | 11 +++++++++++
 lua/astal/widget.lua   |  5 +++++
 src/widget/widget.vala | 23 +++++++++++++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/gjs/src/astalify.ts b/gjs/src/astalify.ts
index 6c74179..f198f68 100644
--- a/gjs/src/astalify.ts
+++ b/gjs/src/astalify.ts
@@ -67,6 +67,7 @@ export type Widget<C extends { new(...args: any): Gtk.Widget }> = InstanceType<C
     className: string
     css: string
     cursor: Cursor
+    clickThrough: boolean
     toggleClassName(name: string, on?: boolean): void
     hook(
         object: Connectable,
@@ -205,6 +206,15 @@ function proxify<
         this.cursor = cursor
     }
 
+    Object.defineProperty(klass.prototype, "clickThrough", {
+        get() { return Astal.widget_get_click_through(this) },
+        set(v) { Astal.widget_set_click_through(this, v) },
+    })
+
+    klass.prototype.set_click_through = function(clickThrough: boolean) {
+        this.clickThrough = clickThrough
+    }
+
     const proxy = new Proxy(klass, {
         construct(_, [conf, ...children]) {
             const self = new klass
@@ -256,6 +266,7 @@ export type ConstructProps<
     className?: string
     css?: string
     cursor?: string
+    clickThrough?: boolean
 }> & {
     onDestroy?: (self: Widget<Self>) => unknown
     onDraw?: (self: Widget<Self>) => unknown
diff --git a/lua/astal/widget.lua b/lua/astal/widget.lua
index f38cdb9..d2dadc6 100644
--- a/lua/astal/widget.lua
+++ b/lua/astal/widget.lua
@@ -259,6 +259,11 @@ Gtk.Widget._attribute.cursor = {
     set = Astal.widget_set_cursor,
 }
 
+Gtk.Widget._attribute.click_through = {
+    get = Astal.widget_get_click_through,
+    set = Astal.widget_set_click_through,
+}
+
 Astal.Box._attribute.children = {
     get = Astal.Box.get_children,
     set = Astal.Box.set_children,
diff --git a/src/widget/widget.vala b/src/widget/widget.vala
index de5ba00..2506bc8 100644
--- a/src/widget/widget.vala
+++ b/src/widget/widget.vala
@@ -131,4 +131,27 @@ public void widget_set_cursor(Gtk.Widget widget, string cursor) {
 public string widget_get_cursor(Gtk.Widget widget) {
     return Cursor.cursors.get(widget);
 }
+
+private class ClickThrough {
+    private static HashTable<Gtk.Widget, bool> _click_through;
+    public static HashTable<Gtk.Widget, bool> click_through {
+        get {
+            if (_click_through == null) {
+                _click_through = new HashTable<Gtk.Widget, bool>(
+                    (w) => (uint)w,
+                    (a, b) => a == b);
+            }
+            return _click_through;
+        }
+    }
+}
+
+public void widget_set_click_through(Gtk.Widget widget, bool click_through) {
+    ClickThrough.click_through.set(widget, click_through);
+    widget.input_shape_combine_region(click_through ? new Cairo.Region() : null);
+}
+
+public bool widget_get_click_through(Gtk.Widget widget) {
+    return ClickThrough.click_through.get(widget);
+}
 }
-- 
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