LocalLinkMovementMethod.java 文件源码

public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
    int action = event.getAction();
    if (action != MotionEvent.ACTION_UP && action != MotionEvent.ACTION_DOWN) {
        return Touch.onTouchEvent(widget, buffer, event);
    }

    int x = (((int) event.getX()) - widget.getTotalPaddingLeft()) + widget.getScrollX();
    int y = (((int) event.getY()) - widget.getTotalPaddingTop()) + widget.getScrollY();
    Layout layout = widget.getLayout();
    int off = layout.getOffsetForHorizontal(layout.getLineForVertical(y), (float) x);
    ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);
    if (link.length != 0) {
        if (action == MotionEvent.ACTION_UP) {
            link[0].onClick(widget);
        } else {
            Selection.setSelection(buffer, buffer.getSpanStart(link[0]), buffer.getSpanEnd(link[0]));
        }
        if (!(widget instanceof TextViewFixTouchConsume)) {
            return true;
        }
        ((TextViewFixTouchConsume) widget).linkHit = true;
        return true;
    }
    Selection.removeSelection(buffer);
    Touch.onTouchEvent(widget, buffer, event);
    return false;
}