ArrowKeyMovementMethod.java 文件源码

public boolean doFunction(TextView widget, Spannable buffer, int function)
{
    boolean cap = (MetaKeyKeyListener.getMetaState(buffer,
            KeyEvent.META_SHIFT_ON) == 1) ||
          (JotaTextKeyListener.getMetaStateSelecting(buffer) != 0);

    Log.d("=========================>","cap="+cap);

    switch( function )
    {
        case TextView.FUNCTION_CURSOR_LEFT:
            return moveLeft(widget, buffer, cap);
        case TextView.FUNCTION_CURSOR_RIGHT:
            return moveRight(widget, buffer, cap);
        case TextView.FUNCTION_CURSOR_UP:
            return moveUp(widget, buffer, cap);
        case TextView.FUNCTION_CURSOR_DOWN:
            return moveDown(widget, buffer, cap);
        case TextView.FUNCTION_PAGE_UP:
            return movePageUp(widget, buffer, cap);
        case TextView.FUNCTION_PAGE_DOWN:
            return movePageDown(widget, buffer, cap);
        case TextView.FUNCTION_HOME:
            return moveHome(widget, buffer, cap);
        case TextView.FUNCTION_END:
            return moveEnd(widget, buffer, cap);
        case TextView.FUNCTION_TOP:
            return moveTop(widget, buffer, cap);
        case TextView.FUNCTION_BOTTOM:
            return moveBottom(widget, buffer, cap);
    }
    return false;
}