From d9653a26e29a39226d4c993027ddb0e5930311d5 Mon Sep 17 00:00:00 2001
From: Justin Mitchell <justin@jmitch.com>
Date: Tue, 7 Oct 2025 01:53:48 -0400
Subject: [PATCH] feat: Add mobile keyboard support for Emscripten builds

Add JavaScript hooks when text input is enabled/disabled.
This allows love.keyboard.setTextInput(true) to trigger
mobile keyboards on iOS/Android browsers.

JavaScript implementation in love.js handles the browser
security requirement for synchronous focus during touch events.

Usage: Call love.keyboard.setTextInput(true) in your game
and the mobile keyboard will appear when user taps the canvas.
---
 CMakeLists.txt                        |  2 +-
 src/modules/keyboard/sdl/Keyboard.cpp | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59a379920..7f93b116d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
 	message(FATAL_ERROR "Prevented in-tree build.")
 endif()
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.10)
 
 project(love)
 
diff --git a/src/modules/keyboard/sdl/Keyboard.cpp b/src/modules/keyboard/sdl/Keyboard.cpp
index 51150e7fe..95cf0bea5 100644
--- a/src/modules/keyboard/sdl/Keyboard.cpp
+++ b/src/modules/keyboard/sdl/Keyboard.cpp
@@ -21,6 +21,10 @@
 #include "Keyboard.h"
 #include "window/Window.h"
 
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
+
 namespace love
 {
 namespace keyboard
@@ -112,9 +116,29 @@ Keyboard::Scancode Keyboard::getScancodeFromKey(Key key) const
 void Keyboard::setTextInput(bool enable)
 {
 	if (enable)
+	{
 		SDL_StartTextInput();
+#ifdef __EMSCRIPTEN__
+		// Call JavaScript function to show mobile keyboard
+		EM_ASM({
+			if (typeof window.SDL_StartTextInput === 'function') {
+				window.SDL_StartTextInput();
+			}
+		});
+#endif
+	}
 	else
+	{
 		SDL_StopTextInput();
+#ifdef __EMSCRIPTEN__
+		// Call JavaScript function to hide mobile keyboard
+		EM_ASM({
+			if (typeof window.SDL_StopTextInput === 'function') {
+				window.SDL_StopTextInput();
+			}
+		});
+#endif
+	}
 }
 
 void Keyboard::setTextInput(bool enable, double x, double y, double w, double h)