正则表达式代码:C#正则实现Ubb解析类的代码来源: 发布时间:星期日, 2009年9月6日 浏览:2次 评论:0
解析得到
 代码能通过XHTML 1.0 STRICT验证; 包含了标题,链接,字体,对齐,图片,引用,列表等方面 功能. Ubb.ReadMe.htm 点击运行可以看到效果: [Ctrl+A 全选 提示:你可先修改部分代码,再按运行] 复制代码 代码如下: //作者:deerchao // http://www.unibetter.com/blogs/blogdeerchao/default.aspx //在不移除以上(及本条)注释 前提下,任何人可以以任何方式使用此代码. using  ; using .Collections.Generic; using .Text; using .Web; using .Text.RegularExpressions;  Deerchao.Web { public  UbbDecoder { private  readonly RegexOptions options = RegexOptions.Compiled | RegexOptions.Singleline; /// <summary> /// 解析Ubb代码为Html代码 /// </summary> /// <param name="ubb">Ubb代码</param> /// <  s>解析得到Html代码</s> public  Decode( ubb) {  (.IsNullOrEmpty(ubb)) null; result = ubb; result = HttpUtility.HtmlEncode(result); result = DecodeStyle(result); result = DecodeFont(result); result = DecodeColor(result); result = DecodeImage(result); result = DecodeLinks(result); result = DecodeQuote(result); result = DecodeAlign(result); result = DecodeList(result); result = DecodeHeading(result); result = DecodeBlank(result); result; } /// <summary> /// 解析Ubb代码为Html代码,所有 链接为rel="nofollow" /// </summary> /// <param name="ubb">Ubb代码</param> /// < s>解析得到Html代码</s> public DecodeNoFollow( ubb) { (.IsNullOrEmpty(ubb)) null; result = ubb; result = HttpUtility.HtmlEncode(result); result = DecodeStyle(result); result = DecodeFont(result); result = DecodeColor(result); result = DecodeImage(result); result = DecodeLinksNoFollow(result); result = DecodeQuote(result); result = DecodeAlign(result); result = DecodeList(result); result = DecodeHeading(result); result = DecodeBlank(result); result; } private DecodeHeading( ubb) { result = ubb; result = Regex.Replace(result, @"\[h(\d)\](.*?)\[/h\1\]", "<h$1>$2</h$1>", options); result; } private DecodeList( ubb) { sListFormat = "<ol style=\"list-style:{0};\">$1</ol>"; result = ubb; // Lists result = Regex.Replace(result, @"\[\*\]([^\  *)", "<li>$1</li>", options); result = Regex.Replace(result, @"\[list\]\s*(.*?)\[/list\]", "<ul>$1</ul>", options); result = Regex.Replace(result, @"\[list=1\]\s*(.*?)\[/list\]", .Format(sListFormat, "decimal"), options); result = Regex.Replace(result, @"\[list=i\]\s*(.*?)\[/list\]", .Format(sListFormat, "lower-roman"), options); result = Regex.Replace(result, @"\[list=I\]\s*(.*?)\[/list\]", .Format(sListFormat, "upper-roman"), options); result = Regex.Replace(result, @"\[list=a\]\s*(.*?)\[/list\]", .Format(sListFormat, "lower-alpha"), options); result = Regex.Replace(result, @"\[list=A\]\s*(.*?)\[/list\]", .Format(sListFormat, "upper-alpha"), options); result; } private DecodeBlank( ubb) { result = ubb; result = Regex.Replace(result, @"(?<= ) | (?= )", " ", options); result = Regex.Replace(result, @"\r\n", "<br />"); blockTags = {"h[1-6]", "li", "list", "div", "p", "ul"}; //clear br before block tags(start or end) foreach ( tag in blockTags) { Regex r =  Regex("<br />(<" + tag + ")",options); result = r.Replace(result, "$1"); r = Regex("<br />(</" + tag + ")",options); result = r.Replace(result, "$1"); } result; } private DecodeAlign( ubb) { result = ubb; result = Regex.Replace(result, @"\[left\](.*?)\[/left\]", "<div style=\"text-align:left\">$1</div>", options); result = Regex.Replace(result, @"\[right\](.*?)\[/right\]", "<div style=\"text-align:right\">$1</div>", options); result = Regex.Replace(result, @"\[center\](.*?)\[/center\]", "<div style=\"text-align:center\">$1</div>", options); result; } private DecodeQuote( ubb) { result = ubb; result = Regex.Replace(result, @"\[quote\]", "<blockquote><div>", options); result = Regex.Replace(result, @"\[/quote\]", "</div></blockquote>", options); result; } private DecodeFont( ubb) { result = ubb; result = Regex.Replace(result, @"\[size=([-\w]+)\](.*?)\[/size\]", "<span style=\"font-size:$1\">$2</span>", options); result = Regex.Replace(result, @"\[font=(.*?)\](.*?)\[/font\]", "<span style=\"font-family:$1\">$2</span>", options); result; } private DecodeLinks( ubb) { result = ubb; result = Regex.Replace(result, @"\[url\]www\.(.*?)\[/url\]", "<a href=\"http://www.$1\">$1</a>", options); result = Regex.Replace(result, @"\[url\](.*?)\[/url\]", "<a href=\"$1\">$1</a>", options); result = Regex.Replace(result, @"\[url=(.*?)\](.*?)\[/url\]", "<a href=\"$1\" title=\"$2\">$2</a>", options); result = Regex.Replace(result, @"\[email\](.*?)\[/email\]", "<a href=\"mailto:$1\">$1</a>", options); result; } private DecodeLinksNoFollow( ubb) { result = ubb; result = Regex.Replace(result, @"\[url\]www\.(.*?)\[/url\]", "<a rel=\"nofollow\" href=\"http://www.$1\">$1</a>", options); result = Regex.Replace(result, @"\[url\](.*?)\[/url\]", "<a rel=\"nofollow\" href=\"$1\">$1</a>", options); result = Regex.Replace(result, @"\[url=(.*?)\](.*?)\[/url\]", "<a rel=\"nofollow\" href=\"$1\" title=\"$2\">$2</a>", options); result = Regex.Replace(result, @"\[email\](.*?)\[/email\]", "<a href=\"mailto:$1\">$1</a>", options); result; } private DecodeImage( ubb) { result = ubb; result = Regex.Replace(result, @"\[hr\]", "<hr />", options); result = Regex.Replace(result, @"\[img\](.+?)\[/img\]", "<img src=\"$1\" alt=\"\" />", options); result = Regex.Replace(result, @"\[img=(\d+)x(\d+)\](.+?)\[/img\]", "<img src=\"$3\" style=\"width:$1px;height:$2px\" alt=\"\" />", options); result; } private DecodeColor( ubb) { result = ubb; result = Regex.Replace(result, @"\[color=(#?\w+?)\](.+?)\[/color\]", "<span style=\"color:$1\">$2</span>",options); result; } private DecodeStyle( ubb) { result=ubb; //we don't need this for perfomance and other consideration: //(<table[^>]*>(?><table[^>]*>(?<Depth>)|</table>(?<-Depth>)|.)+(?(Depth)(?!))</table>) result = Regex.Replace(result, @"\[[b]\](.*?)\[/[b]\]", "<strong>$1</strong>", options); result = Regex.Replace(result, @"\[[u]\](.*?)\[/[u]\]", "<span style=\"text-decoration:underline\">$1</span>", options); result = Regex.Replace(result, @"\[[i]\](.*?)\[/[i]\]", "<i>$1</i>", options); result; } } } 0
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