SoftKeyboard.java 文件源码

/**
 * This translates incoming hard key events in to edit operations on an
 * InputConnection.  It is only needed when using the
 * PROCESS_HARD_KEYS option.
 */
private boolean translateKeyDown(int keyCode, KeyEvent event) {
    mMetaState = MetaKeyKeyListener.handleKeyDown(mMetaState,
            keyCode, event);
    int c = event.getUnicodeChar(MetaKeyKeyListener.getMetaState(mMetaState));
    mMetaState = MetaKeyKeyListener.adjustMetaAfterKeypress(mMetaState);
    InputConnection ic = getCurrentInputConnection();
    if (c == 0 || ic == null) {
        return false;
    }

    boolean dead = false;

    if ((c & KeyCharacterMap.COMBINING_ACCENT) != 0) {
        dead = true;
        c = c & KeyCharacterMap.COMBINING_ACCENT_MASK;
    }

    if (mComposing.length() > 0) {
        char accent = mComposing.charAt(mComposing.length() -1 );
        int composed = KeyEvent.getDeadChar(accent, c);

        if (composed != 0) {
            c = composed;
            mComposing.setLength(mComposing.length()-1);
        }
    }

    onKey(c, null);

    return true;
}