From 7d1886b22d892837f293833fd7d5154b3075d45b Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 11 Mar 2025 13:45:29 -0600
Subject: [PATCH] provide a copy-constructor for Gtkmm2ext::Bindings

This copies all the binding information for an existing Bindings object,
but then mutates all the action names from foo/bar to name/bar where name
is the given name for the new Bindings object.
---
 libs/gtkmm2ext/bindings.cc          | 28 ++++++++++++++++++++++++++++
 libs/gtkmm2ext/gtkmm2ext/bindings.h |  3 +++
 2 files changed, 31 insertions(+)

diff --git a/libs/gtkmm2ext/bindings.cc b/libs/gtkmm2ext/bindings.cc
index af5a3739c8..f10dc51b12 100644
--- a/libs/gtkmm2ext/bindings.cc
+++ b/libs/gtkmm2ext/bindings.cc
@@ -378,6 +378,17 @@ Bindings::Bindings (std::string const& name)
 	bindings.push_back (this);
 }
 
+Bindings::Bindings (std::string const & name, Bindings const & other)
+	: _name (name)
+	, press_bindings (other.press_bindings)
+	, release_bindings (other.release_bindings)
+	, button_press_bindings (other.button_press_bindings)
+	, button_release_bindings (other.button_release_bindings)
+{
+	relativize ();
+	bindings.push_back (this);
+}
+
 Bindings::~Bindings()
 {
 	bindings.remove (this);
@@ -521,6 +532,23 @@ Bindings::activate (KeyboardKey kb, Operation op)
 	return true;
 }
 
+void
+Bindings::relativize ()
+{
+	for (auto & [key,action_info] : press_bindings) {
+		action_info.action_name = _name + action_info.action_name.substr (action_info.action_name.find_first_of ('/'));
+	}
+	for (auto & [key,action_info] : release_bindings) {
+		action_info.action_name = _name + action_info.action_name.substr (action_info.action_name.find_first_of ('/'));
+	}
+	for (auto & [mb,action_info] : button_press_bindings) {
+		action_info.action_name = _name + action_info.action_name.substr (action_info.action_name.find_first_of ('/'));
+	}
+	for (auto & [mb,action_info] : button_release_bindings) {
+		action_info.action_name = _name + action_info.action_name.substr (action_info.action_name.find_first_of ('/'));
+	}
+}
+
 void
 Bindings::associate ()
 {
diff --git a/libs/gtkmm2ext/gtkmm2ext/bindings.h b/libs/gtkmm2ext/gtkmm2ext/bindings.h
index 1c5869a9a1..dc25297e12 100644
--- a/libs/gtkmm2ext/gtkmm2ext/bindings.h
+++ b/libs/gtkmm2ext/gtkmm2ext/bindings.h
@@ -118,6 +118,7 @@ class LIBGTKMM2EXT_API Bindings {
 	typedef std::map<KeyboardKey,ActionInfo> KeybindingMap;
 
 	Bindings (std::string const& name);
+	Bindings (std::string const & name, Bindings const & other);
 	~Bindings ();
 
 	std::string const& name() const { return _name; }
@@ -191,6 +192,8 @@ class LIBGTKMM2EXT_API Bindings {
 	const KeybindingMap& get_keymap (Operation op) const;
 	MouseButtonBindingMap& get_mousemap (Operation op);
 
+	void relativize ();
+
 	/* GTK has the following position a Gtk::Action:
 	 *
 	 *  accel_path: <Actions>/GroupName/ActionName