From 60425efb991819697c510a0235766fc2a4d1ee63 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 26 Jan 2025 12:47:06 +0200
Subject: [PATCH] Add an API for other libraries and application to register
 device types

---
 source/input/device.cpp | 33 +++++++++++++++++++++++++++++++--
 source/input/device.h   |  4 +++-
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/source/input/device.cpp b/source/input/device.cpp
index 22429a0..cecbe61 100644
--- a/source/input/device.cpp
+++ b/source/input/device.cpp
@@ -1,4 +1,6 @@
 #include "device.h"
+#include <map>
+#include <msp/core/maputils.h>
 #include <msp/strings/format.h>
 
 using namespace std;
@@ -84,6 +86,19 @@ void Device::set_axis_value(unsigned axis, float value, bool event)
 }
 
 
+map<string, DeviceType> &get_device_types()
+{
+	static map<string, DeviceType> types;
+	return types;
+}
+
+DeviceType register_device_type(const char *name)
+{
+	static unsigned next_type = EXTENSION_DEVICE+1;
+	auto i = insert_unique(get_device_types(), name, static_cast<DeviceType>(next_type++));
+	return i->second;
+}
+
 void operator>>(const LexicalConverter &conv, DeviceType &type)
 {
 	if(conv.get()=="UNSPECIFIED")
@@ -97,7 +112,14 @@ void operator>>(const LexicalConverter &conv, DeviceType &type)
 	else if(conv.get()=="GAME_CONTROLLER")
 		type = GAME_CONTROLLER;
 	else
-		throw lexical_error(format("conversion of '%s' to DeviceType", conv.get()));
+	{
+		auto &ext_types = get_device_types();
+		auto i = ext_types.find(conv.get());
+		if(i!=ext_types.end())
+			type = i->second;
+		else
+			throw lexical_error(format("conversion of '%s' to DeviceType", conv.get()));
+	}
 }
 
 void operator<<(LexicalConverter &conv, DeviceType type)
@@ -109,7 +131,14 @@ void operator<<(LexicalConverter &conv, DeviceType type)
 	case MOUSE: conv.result("MOUSE"); break;
 	case TOUCH_SURFACE: conv.result("TOUCH_SURFACE"); break;
 	case GAME_CONTROLLER: conv.result("GAME_CONTROLLER"); break;
-	default: conv.result(format("DeviceType(%#x)", static_cast<int>(type)));
+	default:
+		for(const auto &kvp: get_device_types())
+			if(kvp.second==type)
+			{
+				conv.result(kvp.first);
+				return;
+			}
+		conv.result(format("DeviceType(%#x)", static_cast<int>(type)));
 	}
 }
 
diff --git a/source/input/device.h b/source/input/device.h
index e7a779a..3c0ee26 100644
--- a/source/input/device.h
+++ b/source/input/device.h
@@ -24,7 +24,8 @@ enum DeviceType
 	KEYBOARD,
 	MOUSE,
 	TOUCH_SURFACE,
-	GAME_CONTROLLER
+	GAME_CONTROLLER,
+	EXTENSION_DEVICE
 };
 
 
@@ -82,6 +83,7 @@ protected:
 };
 
 
+MSPGUI_API DeviceType register_device_type(const char *);
 MSPGUI_API void operator>>(const LexicalConverter &, DeviceType &);
 MSPGUI_API void operator<<(LexicalConverter &, DeviceType);
 
-- 
2.45.2