Backported the shortcut context system from godot4.

doc/classes/Control.xml

@@ -773,6 +773,14 @@
 		<member name="rect_size" type="Vector2" setter="_set_size" getter="get_size" default="Vector2( 0, 0 )">
 			The size of the node's bounding rectangle, in pixels. [Container] nodes update this property automatically.
 		</member>
+		<member name="shortcut_context" type="Node" setter="set_shortcut_context" getter="get_shortcut_context">
+			The [Node] which must be a parent of the focused [Control] for the shortcut to be activated. If [code]null[/code], the shortcut can be activated when any control is focused (a global shortcut). This allows shortcuts to be accepted only when the user has a certain area of the GUI focused.
+			Setting this will override the node [member shortcut_context_path] is pointing. You can get rid of this override by setting this back to null.
+		</member>
+		<member name="shortcut_context_path" type="NodePath" setter="set_shortcut_context_path" getter="get_shortcut_context_path">
+			The [NodePath] for the [Node] which must be a parent of the focused [Control] for the shortcut to be activated. If [code]null[/code], the shortcut can be activated when any control is focused (a global shortcut). This allows shortcuts to be accepted only when the user has a certain area of the GUI focused.
+			[member shortcut_context] can be used to temporarily override this when needed.
+		</member>
 		<member name="size_flags_horizontal" type="int" setter="set_h_size_flags" getter="get_h_size_flags" default="1">
 			Tells the parent [Container] nodes how they should resize and place the node on the X axis. Use one of the [enum SizeFlags] constants to change the flags. See the constants to learn what each does.
 		</member>

scene/gui/control.cpp

@@ -2503,6 +2503,68 @@ void Control::warp_mouse(const Point2 &p_to_pos) {
 	get_viewport()->warp_mouse(get_global_transform().xform(p_to_pos));
 }
 
+void Control::set_shortcut_context(const Node *p_node) {
+	if (p_node != nullptr) {
+		data.shortcut_context = p_node->get_instance_id();
+	} else {
+		data.shortcut_context = ObjectID();
+	}
+}
+
+Node *Control::get_shortcut_context() const {
+	if (unlikely(data.shortcut_context)) {
+		Object *ctx_obj = ObjectDB::get_instance(data.shortcut_context);
+		Node *ctx_node = Object::cast_to<Node>(ctx_obj);
+
+		return ctx_node;
+	}
+
+	if (likely(data.shortcut_context_path.is_empty())) {
+		return NULL;
+	}
+
+	if (data.shortcut_context_path_cache) {
+		Object *ctx_obj = ObjectDB::get_instance(data.shortcut_context_path_cache);
+
+		if (ctx_obj) {
+			Node *ctx_node = Object::cast_to<Node>(ctx_obj);
+
+			return ctx_node;
+		} else {
+			data.shortcut_context_path_cache = ObjectID();
+		}
+	}
+
+	Node *n = get_node_or_null(data.shortcut_context_path);
+
+	if (n) {
+		data.shortcut_context_path_cache = n->get_instance_id();
+	}
+
+	return n;
+}
+
+void Control::set_shortcut_context_path(const NodePath &p_node_path) {
+	data.shortcut_context_path = p_node_path;
+	data.shortcut_context_path_cache = 0;
+}
+NodePath Control::get_shortcut_context_path() const {
+	return data.shortcut_context_path;
+}
+
+bool Control::is_focus_owner_in_shortcut_context() const {
+	if (data.shortcut_context == ObjectID()) {
+		// No context, therefore global - always "in" context.
+		return true;
+	}
+
+	const Node *ctx_node = get_shortcut_context();
+	const Control *vp_focus = get_viewport() ? get_viewport()->_gui_get_focus_owner() : NULL;
+
+	// If the context is valid and the viewport focus is valid, check if the context is the focus or is a parent of it.
+	return ctx_node && vp_focus && (ctx_node == vp_focus || ctx_node->is_a_parent_of(vp_focus));
+}
+
 bool Control::is_text_field() const {
 	return false;
 }
@@ -2817,6 +2879,12 @@ void Control::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("warp_mouse", "to_position"), &Control::warp_mouse);
 
+	ClassDB::bind_method(D_METHOD("set_shortcut_context", "node"), &Control::set_shortcut_context);
+	ClassDB::bind_method(D_METHOD("get_shortcut_context"), &Control::get_shortcut_context);
+
+	ClassDB::bind_method(D_METHOD("set_shortcut_context_path", "path"), &Control::set_shortcut_context_path);
+	ClassDB::bind_method(D_METHOD("get_shortcut_context_path"), &Control::get_shortcut_context_path);
+
 	ClassDB::bind_method(D_METHOD("minimum_size_changed"), &Control::minimum_size_changed);
 
 	ClassDB::bind_method(D_METHOD("_theme_changed"), &Control::_theme_changed);
@@ -2881,6 +2949,8 @@ void Control::_bind_methods() {
 
 	ADD_GROUP("Input", "input_");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "input_pass_on_modal_close_click"), "set_pass_on_modal_close_click", "get_pass_on_modal_close_click");
+	ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "shortcut_context_path"), "set_shortcut_context_path", "get_shortcut_context_path");
+	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "shortcut_context", PROPERTY_HINT_NONE, "", 0), "set_shortcut_context", "get_shortcut_context");
 
 	ADD_GROUP("Size Flags", "size_flags_");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "size_flags_horizontal", PROPERTY_HINT_FLAGS, "Fill,Expand,Shrink Center,Shrink End"), "set_h_size_flags", "get_h_size_flags");
@@ -3007,7 +3077,9 @@ Control::Control() {
 		data.margin[i] = 0;
 	}
 	data.focus_mode = FOCUS_NONE;
-	data.modal_prev_focus_owner = 0;
+	data.modal_prev_focus_owner = ObjectID();
+	data.shortcut_context = ObjectID();
+	data.shortcut_context_path_cache = ObjectID();
 
 	set_physics_interpolation_mode(Node::PHYSICS_INTERPOLATION_MODE_OFF);
 }

scene/gui/control.h

@@ -199,6 +199,10 @@ private:
 		NodePath focus_next;
 		NodePath focus_prev;
 
+		ObjectID shortcut_context;
+		NodePath shortcut_context_path;
+		mutable ObjectID shortcut_context_path_cache;
+
 		HashMap<StringName, Ref<Texture>> icon_override;
 		HashMap<StringName, Ref<Shader>> shader_override;
 		HashMap<StringName, Ref<StyleBox>> style_override;
@@ -494,6 +498,14 @@ public:
 
 	void warp_mouse(const Point2 &p_to_pos);
 
+	void set_shortcut_context(const Node *p_node);
+	Node *get_shortcut_context() const;
+
+	void set_shortcut_context_path(const NodePath &p_node_path);
+	NodePath get_shortcut_context_path() const;
+
+	bool is_focus_owner_in_shortcut_context() const;
+
 	virtual bool is_text_field() const;
 
 	Control *get_root_parent_control() const;

scene/main/scene_tree.cpp

@@ -45,6 +45,7 @@
 #include "scene/3d/spatial.h"
 #include "scene/animation/scene_tree_tween.h"
 #include "scene/debugger/script_debugger_remote.h"
+#include "scene/gui/control.h"
 #include "scene/resources/dynamic_font.h"
 #include "scene/resources/material.h"
 #include "scene/resources/mesh.h"
@@ -1279,6 +1280,8 @@ void SceneTree::_call_input_pause(const StringName &p_group, const CallInputType
 	call_lock++;
 	_THREAD_SAFE_UNLOCK_
 
+	Vector<Node *> no_context_nodes;
+
 	StringName method;
 
 	switch (p_call_type) {
@@ -1296,6 +1299,7 @@ void SceneTree::_call_input_pause(const StringName &p_group, const CallInputType
 			break;
 	}
 
+	if (p_call_type != CALL_INPUT_TYPE_SHORTCUT_INPUT) {
 		for (int i = node_count - 1; i >= 0; i--) {
 			if (input_handled) {
 				break;
@@ -1313,6 +1317,45 @@ void SceneTree::_call_input_pause(const StringName &p_group, const CallInputType
 			n->call_multilevel(method, (const Variant **)v, 1);
 			//ERR_FAIL_COND(node_count != g.nodes.size());
 		}
+	} else {
+		for (int i = node_count - 1; i >= 0; i--) {
+			if (input_handled) {
+				break;
+			}
+
+			Node *n = nodes[i];
+			if (call_lock && call_skip.has(n)) {
+				continue;
+			}
+
+			if (!n->can_process()) {
+				continue;
+			}
+
+			const Control *c = Object::cast_to<Control>(n);
+			if (c) {
+				// If calling shortcut input on a control, ensure it respects the shortcut context.
+				// Shortcut context (based on focus) only makes sense for controls (UI), so don't need to worry about it for nodes
+				if (c->get_shortcut_context() == NULL) {
+					no_context_nodes.push_back(n);
+					continue;
+				}
+				if (!c->is_focus_owner_in_shortcut_context()) {
+					continue;
+				}
+			}
+
+			n->call_multilevel(method, (const Variant **)v, 1);
+			//ERR_FAIL_COND(node_count != g.nodes.size());
+		}
+
+		int ncns = no_context_nodes.size();
+
+		for (int i = 0; i < ncns; ++i) {
+			Node *n = no_context_nodes[i];
+			n->call_multilevel(method, (const Variant **)v, 1);
+		}
+	}
 
 	_THREAD_SAFE_LOCK_
 	call_lock--;