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PORecursive regex for div tags(not trying to parse html with regex)
 

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  1. PORecursive regex for div tags(not trying to parse html with regex)
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    <p>I have a bunch of wiki markup, sometimes people just throw random html down in the middle of wiki markup and somehow wikipedia just rolls with it, as it does for all kinds of other badly formed wiki markup. I want to match everything inside the divs.</p> <p>I need to recursively find all the <code>&lt;div&gt;blah&lt;/div&gt;</code> tags including div tags with other div tags inside them. I am trying to match the div tags and everything inside of them. I have this which I believe almost works:</p> <pre><code>new Regex(@"\&lt;div.*?\&gt; (?&lt;DEPTH&gt;) # opening (?&gt; # now match... [^(\&lt;div.*?\&gt;)(\&lt;\/div\&gt;)]+ # any characters except divs | # or \&lt;div.*?\&gt; (?&lt;DEPTH&gt;) # a opening div, increasing the depth counter | # or \&lt;\/div\&gt; (?&lt;-DEPTH&gt;) # a closing div, decreasing the depth counter )* # any number of times (?(DEPTH)(?!)) # until the depth counter is zero again \&lt;\/div\&gt; # then match the closing fix", RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline); </code></pre> <p>Maybe I should be using another methodology to parse this but at this point this is the final regex statement that I need.</p> <p>Here is an example:</p> <pre><code>&lt;div class="infobox sisterproject" style="font-size: 90%; padding: .5em 1em 1em 1em;"&gt; &lt;div style="text-align:center;"&gt; Find more about '''{{{display|{{{1|{{PAGENAME}}}}}}}}''' on Wikipedia's [[Wikipedia:Wikimedia sister projects|sister projects]]: &lt;/div&gt;&lt;!-- --&gt;{{#ifeq:{{{wikt}}}|no||&lt;!-- --&gt;[[File:Wiktionary-logo-en.svg|25px|link=wikt:Special:Search/{{{wikt|{{{1|{{PAGENAME}}}}}}}}|Search Wiktionary]] [[wikt:Special:Search/{{{wikt|{{{1|{{PAGENAME}}}}}}}}|Definitions]] from Wiktionary&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{b}}}|no||&lt;!-- --&gt;[[File:Wikibooks-logo.svg|25px|link=b:Special:Search/{{{b|{{{1|{{PAGENAME}}}}}}}}|Search Wikibooks]] [[b:Special:Search/{{{b|{{{1|{{PAGENAME}}}}}}}}|Textbooks]] from Wikibooks&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{q}}}|no||&lt;!-- --&gt;[[File:Wikiquote-logo.svg|25px|link=q:Special:Search/{{{q|{{{1|{{PAGENAME}}}}}}}}|Search Wikiquote]] [[q:Special:Search/{{{q|{{{1|{{PAGENAME}}}}}}}}|Quotations]] from Wikiquote&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{s}}}|no||{{#ifeq:{{{author|no}}}|yes|&lt;!-- --&gt;[[File:Wikisource-logo.svg|25px|link=s:Special:Search/Author:{{{s|{{{1|{{PAGENAME}}}}}}}}|Search Wikisource]] [[s:Special:Search/Author:{{{s|{{{1|{{PAGENAME}}}}}}}}|Source texts]] from Wikisource&lt;br /&gt;|&lt;!-- --&gt;[[File:Wikisource-logo.svg|25px|link=s:Special:Search/{{{s|{{{1|{{PAGENAME}}}}}}}}|Search Wikisource]] [[s:Special:Search/{{{s|{{{1|{{PAGENAME}}}}}}}}|Source texts]] from Wikisource&lt;br /&gt;}}}}&lt;!-- --&gt;{{#ifeq:{{{commons}}}|no||&lt;!-- --&gt;[[File:Commons-logo.svg|25px|link=commons:Special:Search/{{{commons|{{{1|{{PAGENAME}}}}}}}}|Search Commons]] [[commons:Special:Search/{{{commons|{{{1|{{PAGENAME}}}}}}}}|Images and media]] from Commons&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{n}}}|no||&lt;!-- --&gt;[[File:Wikinews-logo.svg|25px|link=n:Special:Search/{{{n|{{{1|{{PAGENAME}}}}}}}}|Search Wikinews]] [[n:Special:Search/{{{n|{{{1|{{PAGENAME}}}}}}}}|News stories]] from Wikinews&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{v}}}|no||&lt;!-- --&gt;[[File:Wikiversity-logo-Snorky.svg|25px|link=v:Special:Search/{{{v|{{{1|{{PAGENAME}}}}}}}}|Search Wikiversity]] [[v:Special:Search/{{{v|{{{1|{{PAGENAME}}}}}}}}|Learning resources]] from Wikiversity&lt;br /&gt;}}&lt;!-- --&gt;{{#ifeq:{{{species&lt;includeonly&gt;|no&lt;/includeonly&gt;}}}|no||&lt;!-- --&gt;[[File:Wikispecies-logo.svg|25px|link=species:Special:Search/{{{species&lt;noinclude&gt;|{{{1|{{PAGENAME}}}}}&lt;/noinclude&gt;}}}|Search Wikispecies]] [[species:Special:Search/{{{species&lt;noinclude&gt;|{{{1|{{PAGENAME}}}}}&lt;/noinclude&gt;}}}|{{{species&lt;noinclude&gt;|{{{1|{{PAGENAME}}}}}&lt;/noinclude&gt;}}}]] from Wikispecies}} &lt;/div&gt;&lt;noinclude&gt; </code></pre> <p>Thanks</p>
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    1. COAdmittedly without any knowledge of Wiki markup, wouldn't simply stripping all HTML tags be a better idea? Because as it stands, contrary to the question title you are indeed trying to parse HTML markup with a regex ;)
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      1. USSirViver
    2. COThis might be defeatist but typically as soon as we have the words 'recursive' and 'regex' in the same sentence, 'impossible' isn't far behind; unless you manually run your own state machine to keep track of depths, calling multiple regexes yourself. Regex's state machine can't handle this kind of thing I think. It might help, however, if you say what you want matched out of that example.
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      1. USAndras Zoltan
    3. CO"(not trying to parse html with regex)" <- hahaha, nice one! Obviously, you read some of the other questions with "html" and "regex". ;-)
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      1. USDaniel Hilgarth
 

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