Fix emscripten support

src/openrct2-ui/TextComposition.cpp

@@ -19,6 +19,10 @@
 #include <openrct2/core/String.hpp>
 #include <openrct2/core/UTF8.h>
 
+#ifdef __EMSCRIPTEN__
+    #include <emscripten.h>
+#endif
+
 #ifdef __MACOSX__
     // macOS uses COMMAND rather than CTRL for many keyboard shortcuts
     #define KEYBOARD_PRIMARY_MODIFIER KMOD_GUI
@@ -170,7 +174,21 @@ void TextComposition::HandleMessage(const SDL_Event* e)
                 case SDLK_c:
                     if ((modifier & KEYBOARD_PRIMARY_MODIFIER) && _session.Length)
                     {
+#ifndef __EMSCRIPTEN__
                         SDL_SetClipboardText(_session.Buffer->c_str());
+#else
+                        MAIN_THREAD_EM_ASM(
+                            {
+                                try
+                                {
+                                    navigator.clipboard.writeText(UTF8ToString($0));
+                                }
+                                catch (e)
+                                {
+                                };
+                            },
+                            _session.Buffer->c_str());
+#endif
                         ContextShowError(STR_COPY_INPUT_TO_CLIPBOARD, STR_NONE, {});
                     }
                     break;