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plugin.js
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plugin.js
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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
*/
/**
* @fileOverview The [Stylesheet Parser](https://ckeditor.com/cke4/addon/stylesheetparser) plugin.
*/
( function() {
// We want to extract only the elements with classes defined in the stylesheets:
function parseClasses( aRules, skipSelectors, validSelectors ) {
// aRules are just the different rules in the style sheets
// We want to merge them and them split them by commas, so we end up with only
// the selectors
var s = aRules.join( ' ' );
// Remove selectors splitting the elements, leave only the class selector (.)
s = s.replace( /(,|>|\+|~)/g, ' ' );
// Remove attribute selectors: table[border="0"]
s = s.replace( /\[[^\]]*/g, '' );
// Remove Ids: div#main
s = s.replace( /#[^\s]*/g, '' );
// Remove pseudo-selectors and pseudo-elements: :hover :nth-child(2n+1) ::before
s = s.replace( /\:{1,2}[^\s]*/g, '' );
s = s.replace( /\s+/g, ' ' );
var aSelectors = s.split( ' ' ),
aClasses = [];
for ( var i = 0; i < aSelectors.length; i++ ) {
var selector = aSelectors[ i ];
if ( validSelectors.test( selector ) && !skipSelectors.test( selector ) ) {
// If we still don't know about this one, add it
if ( CKEDITOR.tools.indexOf( aClasses, selector ) == -1 )
aClasses.push( selector );
}
}
return aClasses;
}
function LoadStylesCSS( theDoc, skipSelectors, validSelectors ) {
var styles = [],
// It will hold all the rules of the applied stylesheets (except those internal to CKEditor)
aRules = [],
i;
for ( i = 0; i < theDoc.styleSheets.length; i++ ) {
var sheet = theDoc.styleSheets[ i ],
node = sheet.ownerNode || sheet.owningElement;
// Skip the internal stylesheets
if ( node.getAttribute( 'data-cke-temp' ) )
continue;
// Exclude stylesheets injected by extensions
if ( sheet.href && sheet.href.substr( 0, 9 ) == 'chrome://' )
continue;
// Bulletproof with x-domain content stylesheet.
try {
var sheetRules = sheet.cssRules || sheet.rules;
for ( var j = 0; j < sheetRules.length; j++ )
aRules.push( sheetRules[ j ].selectorText );
} catch ( e ) {}
}
var aClasses = parseClasses( aRules, skipSelectors, validSelectors );
// Add each style to our "Styles" collection.
for ( i = 0; i < aClasses.length; i++ ) {
var oElement = aClasses[ i ].split( '.' ),
element = oElement[ 0 ].toLowerCase(),
sClassName = oElement[ 1 ];
styles.push( {
name: element + '.' + sClassName,
element: element,
attributes: { 'class': sClassName }
} );
}
return styles;
}
// Register a plugin named "stylesheetparser".
CKEDITOR.plugins.add( 'stylesheetparser', {
init: function( editor ) {
// Stylesheet parser is incompatible with filter (https://dev.ckeditor.com/ticket/10136).
editor.filter.disable();
var cachedDefinitions;
editor.once( 'stylesSet', function( evt ) {
// Cancel event and fire it again when styles are ready.
evt.cancel();
// Overwrite editor#getStylesSet asap (contentDom is the first moment
// when editor.document is ready), but before stylescombo reads styles set (priority 5).
editor.once( 'contentDom', function() {
editor.getStylesSet( function( definitions ) {
// Rules that must be skipped
var skipSelectors = editor.config.stylesheetParser_skipSelectors || ( /(^body\.|^\.)/i ),
// Rules that are valid
validSelectors = editor.config.stylesheetParser_validSelectors || ( /\w+\.\w+/ );
cachedDefinitions = definitions.concat( LoadStylesCSS( editor.document.$, skipSelectors, validSelectors ) );
editor.getStylesSet = function( callback ) {
if ( cachedDefinitions )
return callback( cachedDefinitions );
};
editor.fire( 'stylesSet', { styles: cachedDefinitions } );
} );
} );
}, null, null, 1 );
}
} );
} )();
/**
* A regular expression that defines whether a CSS rule will be
* skipped by the Stylesheet Parser plugin. A CSS rule matching
* the regular expression will be ignored and will not be available
* in the Styles drop-down list.
*
* Read more in the {@glink features/styles#the-stylesheet-parser-plugin documentation}
* and see the {@glink examples/styles example}.
*
* // Ignore rules for body and caption elements, classes starting with "high", and any class defined for no specific element.
* config.stylesheetParser_skipSelectors = /(^body\.|^caption\.|\.high|^\.)/i;
*
* @since 3.6.0
* @cfg {RegExp} [stylesheetParser_skipSelectors=/(^body\.|^\.)/i]
* @member CKEDITOR.config
* @see CKEDITOR.config#stylesheetParser_validSelectors
*/
/**
* A regular expression that defines which CSS rules will be used
* by the Stylesheet Parser plugin. A CSS rule matching the regular
* expression will be available in the Styles drop-down list.
*
* Read more in the {@glink features/styles#the-stylesheet-parser-plugin documentation}
* and see the {@glink examples/styles example}.
*
* // Only add rules for p and span elements.
* config.stylesheetParser_validSelectors = /\^(p|span)\.\w+/;
*
* @since 3.6.0
* @cfg {RegExp} [stylesheetParser_validSelectors=/\w+\.\w+/]
* @member CKEDITOR.config
* @see CKEDITOR.config#stylesheetParser_skipSelectors
*/