Add constexpr into sdlinput.

1 files changed, 223 insertions, 1 deletions

diff --git a/src/gui/sdlinput.h b/src/gui/sdlinput.h
index 3d865389e..b5454b7f7 100644
--- a/src/gui/sdlinput.h
+++ b/src/gui/sdlinput.h
@@ -78,6 +78,8 @@
 #ifndef GUI_SDLINPUT_H
 #define GUI_SDLINPUT_H
 
+#include "enums/input/keyvalue.h"
+
 #include "input/keyinput.h"
 
 #include <SDL_events.h>
@@ -139,7 +141,227 @@ class SDLInput final
          * @return a key value.
          * @see Key
          */
-        static int convertKeyCharacter(const SDL_Event &event) A_WARN_UNUSED;
+        constexpr2 static int convertKeyCharacter(const SDL_Event &event)
+                                                 A_WARN_UNUSED
+        {
+            const SDL_keysym keysym = event.key.keysym;
+#ifdef USE_SDL2
+            int value = keysym.scancode;
+#else  // USE_SDL2
+
+            int value = keysym.unicode;
+#endif  // USE_SDL2
+
+            PRAGMA45(GCC diagnostic push)
+            PRAGMA45(GCC diagnostic ignored "-Wswitch-enum")
+            switch (keysym.sym)
+            {
+              case SDLK_TAB:
+                  value = KeyValue::TAB;
+                  break;
+              case SDLK_LALT:
+                  value = KeyValue::LEFT_ALT;
+                  break;
+              case SDLK_RALT:
+                  value = KeyValue::RIGHT_ALT;
+                  break;
+              case SDLK_LSHIFT:
+                  value = KeyValue::LEFT_SHIFT;
+                  break;
+              case SDLK_RSHIFT:
+                  value = KeyValue::RIGHT_SHIFT;
+                  break;
+              case SDLK_LCTRL:
+                  value = KeyValue::LEFT_CONTROL;
+                  break;
+              case SDLK_RCTRL:
+                  value = KeyValue::RIGHT_CONTROL;
+                  break;
+              case SDLK_BACKSPACE:
+                  value = KeyValue::BACKSPACE;
+                  break;
+              case SDLK_PAUSE:
+                  value = KeyValue::PAUSE;
+                  break;
+              case SDLK_SPACE:
+                  // Special characters like ~ (tilde) ends up
+                  // with the keysym.sym SDLK_SPACE which
+                  // without this check would be lost. The check
+                  // is only valid on key down events in SDL.
+#ifndef USE_SDL2
+                  if (event.type == SDL_KEYUP ||
+                      keysym.unicode == ' ')
+#endif  // USE_SDL2
+                  {
+                      value = KeyValue::SPACE;
+                  }
+                  break;
+              case SDLK_ESCAPE:
+#ifdef USE_SDL2
+              case SDLK_AC_BACK:
+#endif  // USE_SDL2
+                  value = KeyValue::ESCAPE;
+                  break;
+              case SDLK_DELETE:
+                  value = KeyValue::DELETE_;
+                  break;
+              case SDLK_INSERT:
+                  value = KeyValue::INSERT;
+                  break;
+              case SDLK_HOME:
+                  value = KeyValue::HOME;
+                  break;
+              case SDLK_END:
+                  value = KeyValue::END;
+                  break;
+              case SDLK_PAGEUP:
+                  value = KeyValue::PAGE_UP;
+                  break;
+              case SDLK_PRINT:
+                  value = KeyValue::PRINT_SCREEN;
+                  break;
+              case SDLK_PAGEDOWN:
+                  value = KeyValue::PAGE_DOWN;
+                  break;
+              case SDLK_F1:
+                  value = KeyValue::F1;
+                  break;
+              case SDLK_F2:
+                  value = KeyValue::F2;
+                  break;
+              case SDLK_F3:
+                  value = KeyValue::F3;
+                  break;
+              case SDLK_F4:
+                  value = KeyValue::F4;
+                  break;
+              case SDLK_F5:
+                  value = KeyValue::F5;
+                  break;
+              case SDLK_F6:
+                  value = KeyValue::F6;
+                  break;
+              case SDLK_F7:
+                  value = KeyValue::F7;
+                  break;
+              case SDLK_F8:
+                  value = KeyValue::F8;
+                  break;
+              case SDLK_F9:
+                  value = KeyValue::F9;
+                  break;
+              case SDLK_F10:
+                  value = KeyValue::F10;
+                  break;
+              case SDLK_F11:
+                  value = KeyValue::F11;
+                  break;
+              case SDLK_F12:
+                  value = KeyValue::F12;
+                  break;
+              case SDLK_F13:
+                  value = KeyValue::F13;
+                  break;
+              case SDLK_F14:
+                  value = KeyValue::F14;
+                  break;
+              case SDLK_F15:
+                  value = KeyValue::F15;
+                  break;
+              case SDLK_NUMLOCK:
+                  value = KeyValue::NUM_LOCK;
+                  break;
+              case SDLK_CAPSLOCK:
+                  value = KeyValue::CAPS_LOCK;
+                  break;
+              case SDLK_SCROLLOCK:
+                  value = KeyValue::SCROLL_LOCK;
+                  break;
+              case SDLK_RMETA:
+                  value = KeyValue::RIGHT_META;
+                  break;
+              case SDLK_LMETA:
+                  value = KeyValue::LEFT_META;
+                  break;
+#ifndef USE_SDL2
+              case SDLK_LSUPER:
+                  value = KeyValue::LEFT_SUPER;
+                  break;
+              case SDLK_RSUPER:
+                  value = KeyValue::RIGHT_SUPER;
+                  break;
+#endif  // USE_SDL2
+
+              case SDLK_MODE:
+                  value = KeyValue::ALT_GR;
+                  break;
+              case SDLK_UP:
+                  value = KeyValue::UP;
+                  break;
+              case SDLK_DOWN:
+                  value = KeyValue::DOWN;
+                  break;
+              case SDLK_LEFT:
+                  value = KeyValue::LEFT;
+                  break;
+              case SDLK_RIGHT:
+                  value = KeyValue::RIGHT;
+                  break;
+              case SDLK_RETURN:
+                  value = KeyValue::ENTER;
+                  break;
+              case SDLK_KP_ENTER:
+                  value = KeyValue::ENTER;
+                  break;
+
+              default:
+                  break;
+            }
+            PRAGMA45(GCC diagnostic pop)
+
+            if (!(CAST_U32(keysym.mod) & KMOD_NUM))
+            {
+                PRAGMA45(GCC diagnostic push)
+                PRAGMA45(GCC diagnostic ignored "-Wswitch-enum")
+                switch (keysym.sym)
+                {
+                  case SDLK_KP0:
+                      value = KeyValue::INSERT;
+                      break;
+                  case SDLK_KP1:
+                      value = KeyValue::END;
+                      break;
+                  case SDLK_KP2:
+                      value = KeyValue::DOWN;
+                      break;
+                  case SDLK_KP3:
+                      value = KeyValue::PAGE_DOWN;
+                      break;
+                  case SDLK_KP4:
+                      value = KeyValue::LEFT;
+                      break;
+                  case SDLK_KP5:
+                      value = 0;
+                      break;
+                  case SDLK_KP6:
+                      value = KeyValue::RIGHT;
+                      break;
+                  case SDLK_KP7:
+                      value = KeyValue::HOME;
+                      break;
+                  case SDLK_KP8:
+                      value = KeyValue::UP;
+                      break;
+                  case SDLK_KP9:
+                      value = KeyValue::PAGE_UP;
+                      break;
+                  default:
+                      break;
+                }
+                PRAGMA45(GCC diagnostic pop)
+            }
+            return value;
+        }
 
         static void convertKeyEventToKey(const SDL_Event &event,
                                          KeyInput &keyInput);