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/*
Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
/**
* Creates a {@link CKEDITOR.htmlParser} class instance.
* @class Provides an "event like" system to parse strings of HTML data.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onTagOpen = function( tagName, attributes, selfClosing )
* {
* alert( tagName );
* };
* parser.parse( '<p>Some <b>text</b>.</p>' );
*/
CKEDITOR.htmlParser = function()
{
this._ =
{
htmlPartsRegex : new RegExp( '<(?:(?:\\/([^>]+)>)|(?:!--([\\S|\\s]*?)-->)|(?:([^\\s>]+)\\s*((?:(?:"[^"]*")|(?:\'[^\']*\')|[^"\'>])*)\\/?>))', 'g' )
};
};
(function()
{
var attribsRegex = /([\w\-:.]+)(?:(?:\s*=\s*(?:(?:"([^"]*)")|(?:'([^']*)')|([^\s>]+)))|(?=\s|$))/g,
emptyAttribs = {checked:1,compact:1,declare:1,defer:1,disabled:1,ismap:1,multiple:1,nohref:1,noresize:1,noshade:1,nowrap:1,readonly:1,selected:1};
CKEDITOR.htmlParser.prototype =
{
/**
* Function to be fired when a tag opener is found. This function
* should be overriden when using this class.
* @param {String} tagName The tag name. The name is guarantted to be
* lowercased.
* @param {Object} attributes An object containing all tag attributes. Each
* property in this object represent and attribute name and its
* value is the attribute value.
* @param {Boolean} selfClosing true if the tag closes itself, false if the
* tag doesn't.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onTagOpen = function( tagName, attributes, selfClosing )
* {
* alert( tagName ); // e.g. "b"
* });
* parser.parse( "<!-- Example --><b>Hello</b>" );
*/
onTagOpen : function() {},
/**
* Function to be fired when a tag closer is found. This function
* should be overriden when using this class.
* @param {String} tagName The tag name. The name is guarantted to be
* lowercased.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onTagClose = function( tagName )
* {
* alert( tagName ); // e.g. "b"
* });
* parser.parse( "<!-- Example --><b>Hello</b>" );
*/
onTagClose : function() {},
/**
* Function to be fired when text is found. This function
* should be overriden when using this class.
* @param {String} text The text found.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onText = function( text )
* {
* alert( text ); // e.g. "Hello"
* });
* parser.parse( "<!-- Example --><b>Hello</b>" );
*/
onText : function() {},
/**
* Function to be fired when CDATA section is found. This function
* should be overriden when using this class.
* @param {String} cdata The CDATA been found.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onCDATA = function( cdata )
* {
* alert( cdata ); // e.g. "var hello;"
* });
* parser.parse( "<script>var hello;</script>" );
*/
onCDATA : function() {},
/**
* Function to be fired when a commend is found. This function
* should be overriden when using this class.
* @param {String} comment The comment text.
* @example
* var parser = new CKEDITOR.htmlParser();
* parser.onComment = function( comment )
* {
* alert( comment ); // e.g. " Example "
* });
* parser.parse( "<!-- Example --><b>Hello</b>" );
*/
onComment : function() {},
/**
* Parses text, looking for HTML tokens, like tag openers or closers,
* or comments. This function fires the onTagOpen, onTagClose, onText
* and onComment function during its execution.
* @param {String} html The HTML to be parsed.
* @example
* var parser = new CKEDITOR.htmlParser();
* // The onTagOpen, onTagClose, onText and onComment should be overriden
* // at this point.
* parser.parse( "<!-- Example --><b>Hello</b>" );
*/
parse : function( html )
{
var parts,
tagName,
nextIndex = 0,
cdata; // The collected data inside a CDATA section.
while ( ( parts = this._.htmlPartsRegex.exec( html ) ) )
{
var tagIndex = parts.index;
if ( tagIndex > nextIndex )
{
var text = html.substring( nextIndex, tagIndex );
if ( cdata )
cdata.push( text );
else
this.onText( text );
}
nextIndex = this._.htmlPartsRegex.lastIndex;
/*
"parts" is an array with the following items:
0 : The entire match for opening/closing tags and comments.
1 : Group filled with the tag name for closing tags.
2 : Group filled with the comment text.
3 : Group filled with the tag name for opening tags.
4 : Group filled with the attributes part of opening tags.
*/
// Closing tag
if ( ( tagName = parts[ 1 ] ) )
{
tagName = tagName.toLowerCase();
if ( cdata && CKEDITOR.dtd.$cdata[ tagName ] )
{
// Send the CDATA data.
this.onCDATA( cdata.join('') );
cdata = null;
}
if ( !cdata )
{
this.onTagClose( tagName );
continue;
}
}
// If CDATA is enabled, just save the raw match.
if ( cdata )
{
cdata.push( parts[ 0 ] );
continue;
}
// Opening tag
if ( ( tagName = parts[ 3 ] ) )
{
tagName = tagName.toLowerCase();
// There are some tag names that can break things, so let's
// simply ignore them when parsing. (#5224)
if ( /="/.test( tagName ) )
continue;
var attribs = {},
attribMatch,
attribsPart = parts[ 4 ],
selfClosing = !!( attribsPart && attribsPart.charAt( attribsPart.length - 1 ) == '/' );
if ( attribsPart )
{
while ( ( attribMatch = attribsRegex.exec( attribsPart ) ) )
{
var attName = attribMatch[1].toLowerCase(),
attValue = attribMatch[2] || attribMatch[3] || attribMatch[4] || '';
if ( !attValue && emptyAttribs[ attName ] )
attribs[ attName ] = attName;
else
attribs[ attName ] = attValue;
}
}
this.onTagOpen( tagName, attribs, selfClosing );
// Open CDATA mode when finding the appropriate tags.
if ( !cdata && CKEDITOR.dtd.$cdata[ tagName ] )
cdata = [];
continue;
}
// Comment
if ( ( tagName = parts[ 2 ] ) )
this.onComment( tagName );
}
if ( html.length > nextIndex )
this.onText( html.substring( nextIndex, html.length ) );
}
};
})();
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