Platform: use Flag::TextInputActive instead of a boolean in Sdl2Application.

src/Magnum/Platform/Sdl2Application.cpp

@@ -495,21 +495,21 @@ bool Sdl2Application::isTextInputActive() {
     #ifndef CORRADE_TARGET_EMSCRIPTEN
     return SDL_IsTextInputActive();
     #else
-    return _isTextInputActive;
+    return !!(_flags & Flag::TextInputActive);
     #endif
 }
 
 void Sdl2Application::startTextInput() {
     SDL_StartTextInput();
     #ifdef CORRADE_TARGET_EMSCRIPTEN
-    _isTextInputActive = true;
+    _flags |= Flag::TextInputActive;
     #endif
 }
 
 void Sdl2Application::stopTextInput() {
     SDL_StopTextInput();
     #ifdef CORRADE_TARGET_EMSCRIPTEN
-    _isTextInputActive = false;
+    _flags &= ~Flag::TextInputActive;
     #endif
 }
 

src/Magnum/Platform/Sdl2Application.h

@@ -680,6 +680,9 @@ class Sdl2Application {
             #ifndef CORRADE_TARGET_EMSCRIPTEN
             Exit = 1 << 3
             #endif
+            #ifdef CORRADE_TARGET_EMSCRIPTEN
+            TextInputActive = 1 << 4
+            #endif
         };
 
         typedef Containers::EnumSet<Flag> Flags;
@@ -698,7 +701,6 @@ class Sdl2Application {
         UnsignedInt _minimalLoopPeriod;
         #else
         SDL_Surface* _glContext;
-        bool _isTextInputActive = false;
         #endif
 
         std::unique_ptr<Platform::Context> _context;