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/**
* @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* Provides an "event like" system to parse strings of HTML data.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onTagOpen = function( tagName, attributes, selfClosing ) {
* alert( tagName );
* };
* parser.parse( '<p>Some <b>text</b>.</p>' ); // Alerts 'p', 'b'.
*
* @class
* @constructor Creates a htmlParser class instance.
*/
CKEDITOR.htmlParser = function() {
this._ = {
htmlPartsRegex: /<(?:(?:\/([^>]+)>)|(?:!--([\S|\s]*?)--!?>)|(?:([^\/\s>]+)((?:\s+[\w\-:.]+(?:\s*=\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.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onTagOpen = function( tagName, attributes, selfClosing ) {
* alert( tagName ); // e.g. 'b'
* } );
* parser.parse( '<!-- Example --><b>Hello</b>' );
*
* @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.
*/
onTagOpen: function() {},
/**
* Function to be fired when a tag closer is found. This function
* should be overriden when using this class.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onTagClose = function( tagName ) {
* alert( tagName ); // 'b'
* } );
* parser.parse( '<!-- Example --><b>Hello</b>' );
*
* @param {String} tagName The tag name. The name is guarantted to be lowercased.
*/
onTagClose: function() {},
/**
* Function to be fired when text is found. This function
* should be overriden when using this class.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onText = function( text ) {
* alert( text ); // 'Hello'
* } );
* parser.parse( '<!-- Example --><b>Hello</b>' );
*
* @param {String} text The text found.
*/
onText: function() {},
/**
* Function to be fired when CDATA section is found. This function
* should be overriden when using this class.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onCDATA = function( cdata ) {
* alert( cdata ); // 'var hello;'
* } );
* parser.parse( '<script>var hello;</script>' );
*
* @param {String} cdata The CDATA been found.
*/
onCDATA: function() {},
/**
* Function to be fired when a commend is found. This function
* should be overriden when using this class.
*
* var parser = new CKEDITOR.htmlParser();
* parser.onComment = function( comment ) {
* alert( comment ); // ' Example '
* } );
* parser.parse( '<!-- Example --><b>Hello</b>' );
*
* @param {String} comment The comment text.
*/
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.
*
* var parser = new CKEDITOR.htmlParser();
* // The onTagOpen, onTagClose, onText and onComment should be overriden
* // at this point.
* parser.parse( '<!-- Example --><b>Hello</b>' );
*
* @param {String} html The HTML to be parsed.
*/
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.
// : 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. (https://dev.ckeditor.com/ticket/5224)
if ( /="/.test( tagName ) )
continue;
var attribs = {},
attribMatch,
attribsPart = parts[ 4 ],
selfClosing = !!parts[ 5 ];
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 ] = CKEDITOR.tools.htmlDecodeAttr( 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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