C++ WebKeyboardEvent::setKeyIdentifierFromWindowsKeyCode方法代码示例

WebKeyboardEvent WebInputEventFactory::keyboardEvent(HWND hwnd, UINT message,
                                                     WPARAM wparam, LPARAM lparam)
{
    WebKeyboardEvent result;

    // TODO(pkasting): http://b/1117926 Are we guaranteed that the message that
    // GetMessageTime() refers to is the same one that we're passed in? Perhaps
    // one of the construction parameters should be the time passed by the
    // caller, who would know for sure.
    result.timeStampSeconds = GetMessageTime() / 1000.0;

    result.windowsKeyCode = result.nativeKeyCode = static_cast<int>(wparam);

    switch (message) {
    case WM_SYSKEYDOWN:
        result.isSystemKey = true;
    case WM_KEYDOWN:
        result.type = WebInputEvent::RawKeyDown;
        break;
    case WM_SYSKEYUP:
        result.isSystemKey = true;
    case WM_KEYUP:
        result.type = WebInputEvent::KeyUp;
        break;
    case WM_IME_CHAR:
        result.type = WebInputEvent::Char;
        break;
    case WM_SYSCHAR:
        result.isSystemKey = true;
        result.type = WebInputEvent::Char;
    case WM_CHAR:
        result.type = WebInputEvent::Char;
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    if (result.type == WebInputEvent::Char || result.type == WebInputEvent::RawKeyDown) {
        result.text[0] = result.windowsKeyCode;
        result.unmodifiedText[0] = result.windowsKeyCode;
    }
    if (result.type != WebInputEvent::Char)
        result.setKeyIdentifierFromWindowsKeyCode();

    if (GetKeyState(VK_SHIFT) & 0x8000)
        result.modifiers |= WebInputEvent::ShiftKey;
    if (GetKeyState(VK_CONTROL) & 0x8000)
        result.modifiers |= WebInputEvent::ControlKey;
    if (GetKeyState(VK_MENU) & 0x8000)
        result.modifiers |= WebInputEvent::AltKey;
    // NOTE: There doesn't seem to be a way to query the mouse button state in
    // this case.

    if (LOWORD(lparam) > 1)
        result.modifiers |= WebInputEvent::IsAutoRepeat;
    if (isKeyPad(wparam, lparam))
        result.modifiers |= WebInputEvent::IsKeyPad;

    return result;
}

WebKeyboardEvent WebInputEventFactory::keyboardEvent(WebInputEvent::Type type,
                                                     int modifiers,
                                                     double timeStampSeconds,
                                                     int keycode,
                                                     WebUChar unicodeCharacter,
                                                     bool isSystemKey)
{
    WebKeyboardEvent result;

    result.type = type;
    result.modifiers = modifiers;
    result.timeStampSeconds = timeStampSeconds;
    int windowsKeyCode = WebCore::windowsKeyCodeForKeyEvent(keycode);
    result.windowsKeyCode = WebKeyboardEvent::windowsKeyCodeWithoutLocation(windowsKeyCode);
    result.modifiers |= WebKeyboardEvent::locationModifiersFromWindowsKeyCode(windowsKeyCode);
    result.nativeKeyCode = keycode;
    result.unmodifiedText[0] = unicodeCharacter;
    if (result.windowsKeyCode == WebCore::VKEY_RETURN) {
        // This is the same behavior as GTK:
        // We need to treat the enter key as a key press of character \r. This
        // is apparently just how webkit handles it and what it expects.
        result.unmodifiedText[0] = '\r';
    }
    result.text[0] = result.unmodifiedText[0];
    result.setKeyIdentifierFromWindowsKeyCode();
    result.isSystemKey = isSystemKey;

    return result;
}

WebKeyboardEvent WebInputEventFactory::keyboardEvent(const GdkEventKey* event)
{
    WebKeyboardEvent result;

    result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time);
    result.modifiers = gdkStateToWebEventModifiers(normalizeEventState(event));

    switch (event->type) {
    case GDK_KEY_RELEASE:
        result.type = WebInputEvent::KeyUp;
        break;
    case GDK_KEY_PRESS:
        result.type = WebInputEvent::RawKeyDown;
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    // According to MSDN:
    // http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx
    // Key events with Alt modifier and F10 are system key events.
    // We just emulate this behavior. It's necessary to prevent webkit from
    // processing keypress event generated by alt-d, etc.
    // F10 is not special on Linux, so don't treat it as system key.
    if (result.modifiers & WebInputEvent::AltKey)
        result.isSystemKey = true;

    // The key code tells us which physical key was pressed (for example, the
    // A key went down or up).  It does not determine whether A should be lower
    // or upper case.  This is what text does, which should be the keyval.
    int windowsKeyCode = gdkEventToWindowsKeyCode(event);
    result.windowsKeyCode = WebKeyboardEvent::windowsKeyCodeWithoutLocation(windowsKeyCode);
    result.modifiers |= WebKeyboardEvent::locationModifiersFromWindowsKeyCode(windowsKeyCode);
    result.nativeKeyCode = event->hardware_keycode;

    if (result.windowsKeyCode == WebCore::VKEY_RETURN)
        // We need to treat the enter key as a key press of character \r.  This
        // is apparently just how webkit handles it and what it expects.
        result.unmodifiedText[0] = '\r';
    else
        // FIXME: fix for non BMP chars
        result.unmodifiedText[0] =
            static_cast<WebUChar>(gdk_keyval_to_unicode(event->keyval));

    // If ctrl key is pressed down, then control character shall be input.
    if (result.modifiers & WebInputEvent::ControlKey)
        result.text[0] = getControlCharacter(
            result.windowsKeyCode, result.modifiers & WebInputEvent::ShiftKey);
    else
        result.text[0] = result.unmodifiedText[0];

    result.setKeyIdentifierFromWindowsKeyCode();

    // FIXME: Do we need to set IsAutoRepeat?
    if (isKeyPadKeyval(event->keyval))
        result.modifiers |= WebInputEvent::IsKeyPad;

    return result;
}

void TextInputController::setComposition(const CppArgumentList& arguments, CppVariant* result)
{
    result->setNull();

    if (arguments.size() < 1)
        return;

    // Sends a keydown event with key code = 0xE5 to emulate input method behavior.
    WebKeyboardEvent keyDown;
    keyDown.type = WebInputEvent::RawKeyDown;
    keyDown.modifiers = 0;
    keyDown.windowsKeyCode = 0xE5; // VKEY_PROCESSKEY
    keyDown.setKeyIdentifierFromWindowsKeyCode();
    m_webView->handleInputEvent(keyDown);

    WebVector<WebCompositionUnderline> underlines;
    WebString text(WebString::fromUTF8(arguments[0].toString()));
    m_webView->setComposition(text, underlines, 0, text.length());
}