Example of how to translate SDL Key Events into Awesomium Keyboard Events

sdl_key_translation_sample.cc

/// Forward declaration
int getWebKeyFromSDLKey(SDLKey key);

///
/// Inject an SDL Key Event into a given WebView
///
void handleSDLKeyEvent(Awesomium::WebView* webView, const SDL_Event& event) {
  if (!(event.type == SDL_KEYDOWN || event.type == SDL_KEYUP))
    return;

  Awesomium::WebKeyboardEvent keyEvent;

  keyEvent.type = event.type == SDL_KEYDOWN?
                  Awesomium::WebKeyboardEvent::kTypeKeyDown :
                  Awesomium::WebKeyboardEvent::kTypeKeyUp;

  char* buf = new char[20];
  keyEvent.virtual_key_code = getWebKeyFromSDLKey(event.key.keysym.sym);
  Awesomium::GetKeyIdentifierFromVirtualKeyCode(keyEvent.virtual_key_code,
      &buf);
  strcpy(keyEvent.key_identifier, buf);
  delete[] buf;

  keyEvent.modifiers = 0;

  if (event.key.keysym.mod & KMOD_LALT || event.key.keysym.mod & KMOD_RALT)
    keyEvent.modifiers |= Awesomium::WebKeyboardEvent::kModAltKey;
  if (event.key.keysym.mod & KMOD_LCTRL || event.key.keysym.mod & KMOD_RCTRL)
    keyEvent.modifiers |= Awesomium::WebKeyboardEvent::kModControlKey;
  if (event.key.keysym.mod & KMOD_LMETA || event.key.keysym.mod & KMOD_RMETA)
    keyEvent.modifiers |= Awesomium::WebKeyboardEvent::kModMetaKey;
  if (event.key.keysym.mod & KMOD_LSHIFT || event.key.keysym.mod & KMOD_RSHIFT)
    keyEvent.modifiers |= Awesomium::WebKeyboardEvent::kModShiftKey;
  if (event.key.keysym.mod & KMOD_NUM)
    keyEvent.modifiers |= Awesomium::WebKeyboardEvent::kModIsKeypad;

  keyEvent.native_key_code = event.key.keysym.scancode;

  if (event.type == SDL_KEYUP) {
    webView->InjectKeyboardEvent(keyEvent);
  } else {
    unsigned int chr;
    if ((event.key.keysym.unicode & 0xFF80) == 0)
      chr = event.key.keysym.unicode & 0x7F;
    else
      chr = event.key.keysym.unicode;

    keyEvent.text[0] = chr;
    keyEvent.unmodified_text[0] = chr;

    webView->InjectKeyboardEvent(keyEvent);

    if (chr) {
      keyEvent.type = Awesomium::WebKeyboardEvent::kTypeChar;
      keyEvent.virtual_key_code = chr;
      keyEvent.native_key_code = chr;
      webView->InjectKeyboardEvent(keyEvent);
    }
  }
}

/// Helper Macro
#define mapKey(a, b) case SDLK_##a: return Awesomium::KeyCodes::AK_##b;

/// Get an Awesomium KeyCode from an SDLKey Code
int getWebKeyFromSDLKey(SDLKey key) {
  switch (key) {
    mapKey(BACKSPACE, BACK)
    mapKey(TAB, TAB)
    mapKey(CLEAR, CLEAR)
    mapKey(RETURN, RETURN)
    mapKey(PAUSE, PAUSE)
    mapKey(ESCAPE, ESCAPE)
    mapKey(SPACE, SPACE)
    mapKey(EXCLAIM, 1)
    mapKey(QUOTEDBL, 2)
    mapKey(HASH, 3)
    mapKey(DOLLAR, 4)
    mapKey(AMPERSAND, 7)
    mapKey(QUOTE, OEM_7)
    mapKey(LEFTPAREN, 9)
    mapKey(RIGHTPAREN, 0)
    mapKey(ASTERISK, 8)
    mapKey(PLUS, OEM_PLUS)
    mapKey(COMMA, OEM_COMMA)
    mapKey(MINUS, OEM_MINUS)
    mapKey(PERIOD, OEM_PERIOD)
    mapKey(SLASH, OEM_2)
    mapKey(0, 0)
    mapKey(1, 1)
    mapKey(2, 2)
    mapKey(3, 3)
    mapKey(4, 4)
    mapKey(5, 5)
    mapKey(6, 6)
    mapKey(7, 7)
    mapKey(8, 8)
    mapKey(9, 9)
    mapKey(COLON, OEM_1)
    mapKey(SEMICOLON, OEM_1)
    mapKey(LESS, OEM_COMMA)
    mapKey(EQUALS, OEM_PLUS)
    mapKey(GREATER, OEM_PERIOD)
    mapKey(QUESTION, OEM_2)
    mapKey(AT, 2)
    mapKey(LEFTBRACKET, OEM_4)
    mapKey(BACKSLASH, OEM_5)
    mapKey(RIGHTBRACKET, OEM_6)
    mapKey(CARET, 6)
    mapKey(UNDERSCORE, OEM_MINUS)
    mapKey(BACKQUOTE, OEM_3)
    mapKey(a, A)
    mapKey(b, B)
    mapKey(c, C)
    mapKey(d, D)
    mapKey(e, E)
    mapKey(f, F)
    mapKey(g, G)
    mapKey(h, H)
    mapKey(i, I)
    mapKey(j, J)
    mapKey(k, K)
    mapKey(l, L)
    mapKey(m, M)
    mapKey(n, N)
    mapKey(o, O)
    mapKey(p, P)
    mapKey(q, Q)
    mapKey(r, R)
    mapKey(s, S)
    mapKey(t, T)
    mapKey(u, U)
    mapKey(v, V)
    mapKey(w, W)
    mapKey(x, X)
    mapKey(y, Y)
    mapKey(z, Z)
    mapKey(DELETE, DELETE)
    mapKey(KP0, NUMPAD0)
    mapKey(KP1, NUMPAD1)
    mapKey(KP2, NUMPAD2)
    mapKey(KP3, NUMPAD3)
    mapKey(KP4, NUMPAD4)
    mapKey(KP5, NUMPAD5)
    mapKey(KP6, NUMPAD6)
    mapKey(KP7, NUMPAD7)
    mapKey(KP8, NUMPAD8)
    mapKey(KP9, NUMPAD9)
    mapKey(KP_PERIOD, DECIMAL)
    mapKey(KP_DIVIDE, DIVIDE)
    mapKey(KP_MULTIPLY, MULTIPLY)
    mapKey(KP_MINUS, SUBTRACT)
    mapKey(KP_PLUS, ADD)
    mapKey(KP_ENTER, SEPARATOR)
    mapKey(KP_EQUALS, UNKNOWN)
    mapKey(UP, UP)
    mapKey(DOWN, DOWN)
    mapKey(RIGHT, RIGHT)
    mapKey(LEFT, LEFT)
    mapKey(INSERT, INSERT)
    mapKey(HOME, HOME)
    mapKey(END, END)
    mapKey(PAGEUP, PRIOR)
    mapKey(PAGEDOWN, NEXT)
    mapKey(F1, F1)
    mapKey(F2, F2)
    mapKey(F3, F3)
    mapKey(F4, F4)
    mapKey(F5, F5)
    mapKey(F6, F6)
    mapKey(F7, F7)
    mapKey(F8, F8)
    mapKey(F9, F9)
    mapKey(F10, F10)
    mapKey(F11, F11)
    mapKey(F12, F12)
    mapKey(F13, F13)
    mapKey(F14, F14)
    mapKey(F15, F15)
    mapKey(NUMLOCK, NUMLOCK)
    mapKey(CAPSLOCK, CAPITAL)
    mapKey(SCROLLOCK, SCROLL)
    mapKey(RSHIFT, RSHIFT)
    mapKey(LSHIFT, LSHIFT)
    mapKey(RCTRL, RCONTROL)
    mapKey(LCTRL, LCONTROL)
    mapKey(RALT, RMENU)
    mapKey(LALT, LMENU)
    mapKey(RMETA, LWIN)
    mapKey(LMETA, RWIN)
    mapKey(LSUPER, LWIN)
    mapKey(RSUPER, RWIN)
    mapKey(MODE, MODECHANGE)
    mapKey(COMPOSE, ACCEPT)
    mapKey(HELP, HELP)
    mapKey(PRINT, SNAPSHOT)
    mapKey(SYSREQ, EXECUTE)
  default:
    return Awesomium::KeyCodes::AK_UNKNOWN;
  }
}

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