/*
?*?File:?WebFormatter.java
?*?Created?on?2005-6-24
?*?Author:?Liao?Xuefeng?asklxf@163.com
?*?Copyright?（C）?2005?Liao?Xuefeng.
?*/
import?java.util.*;
import?java.text.SimpleDateFormat;

/**
?*?Do?some?format?on?web?display.
?*?
?*?@author?Xuefeng
?*/
public?class?WebFormatter?{

????public?static?String?html2text（String?html）?{
????????StringBuffer?sb?=?new?StringBuffer（html.length（））;
????????char[]?data?=?html.toCharArray（）;
????????int?start?=?0;
????????boolean?previousIsPre?=?false;
????????Token?token?=?null;
????????for（;;）?{
????????????token?=?parse（data?start?previousIsPre）;
????????????if（token==null）
????????????????break;
????????????previousIsPre?=?token.isPreTag（）;
????????????sb?=?sb.append（token.getText（））;
????????????start?+=?token.getLength（）;
????????}
????????return?sb.toString（）;
????}

????private?static?Token?parse（char[]?data?int?start?boolean?previousIsPre）?{
????????if（start>=data.length）
????????????return?null;
????????//?try?to?read?next?char:
????????char?c?=?data[start];
????????if（c==‘<‘）?{
????????????//?this?is?a?tag?or?comment?or?script:
????????????int?end_index?=?indexOf（data?start+1?‘>‘）;
????????????if（end_index==（-1））?{
????????????????//?the?left?is?all?text!
????????????????return?new?Token（Token.TOKEN_TEXT?data?start?data.length?previousIsPre）;
????????????}
????????????String?s?=?new?String（data?start?end_index-start+1）;
????????????//?now?we?got?s=“<...>“:
????????????if（s.startsWith（““）;
????????????????if（end_comment_index==（-1））?{
????????????????????//?illegal?end?but?treat?as?comment:
????????????????????return?new?Token（Token.TOKEN_COMMENT?data?start?data.length?previousIsPre）;
????????????????}
????????????????else
????????????????????return?new?Token（Token.TOKEN_COMMENT?data?start?end_comment_index+3?previousIsPre）;
????????????}
????????????String?s_lowerCase?=?s.toLowerCase（）;
????????????if（s_lowerCase.startsWith（“ript“））?{?//?this?is?a?script:
????????????????int?end_script_index?=?indexOf（data?start+1?“ript>“）;
????????????????if（end_script_index==（-1））
????????????????????//?illegal?end?but?treat?as?script:
????????????????????return?new?Token（Token.TOKEN_script?data?start?data.length?previousIsPre）;
????????????????else
????????????????????return?new?Token（Token.TOKEN_script?data?start?end_script_index+9?previousIsPre）;
????????????}
????????????else?{?//?this?is?a?tag:
????????????????return?new?Token（Token.TOKEN_TAG?data?start?start+s.length（）?previousIsPre）;
????????????}
????????}
????????//?this?is?a?text:
????????int?next_tag_index?=?indexOf（data?start+1?‘<‘）;
????????if（next_tag_index==（-1））
????????????return?new?Token（Token.TOKEN_TEXT?data?start?data.length?previousIsPre）;
????????return?new?Token（Token.TOKEN_TEXT?data?start?next_tag_index?previousIsP