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[mediawiki.git] / resources / mediawiki / mediawiki.util.js

( function ( mw, $ ) {
        'use strict';

        /**
         * Utility library
         * @class mw.util
         * @singleton
         */
        var util = {

                /**
                 * Initialisation
                 * (don't call before document ready)
                 */
                init: function () {
                        var profile, $tocTitle, $tocToggleLink, hideTocCookie;

                        /* Set tooltipAccessKeyPrefix */
                        profile = $.client.profile();

                        // Opera on any platform
                        if ( profile.name === 'opera' ) {
                                util.tooltipAccessKeyPrefix = 'shift-esc-';

                        // Chrome on any platform
                        } else if ( profile.name === 'chrome' ) {

                                util.tooltipAccessKeyPrefix = (
                                        profile.platform === 'mac'
                                                // Chrome on Mac
                                                ? 'ctrl-option-'
                                                // Chrome on Windows or Linux
                                                // (both alt- and alt-shift work, but alt with E, D, F etc does not
                                                // work since they are browser shortcuts)
                                                : 'alt-shift-'
                                );

                        // Non-Windows Safari with webkit_version > 526
                        } else if ( profile.platform !== 'win'
                                && profile.name === 'safari'
                                && profile.layoutVersion > 526 ) {
                                util.tooltipAccessKeyPrefix = 'ctrl-alt-';
                        // Firefox 14+ on Mac
                        } else if ( profile.platform === 'mac'
                                && profile.name === 'firefox'
                                && profile.versionNumber >= 14 ) {
                                util.tooltipAccessKeyPrefix = 'ctrl-option-';
                        // Safari/Konqueror on any platform, or any browser on Mac
                        // (but not Safari on Windows)
                        } else if ( !( profile.platform === 'win' && profile.name === 'safari' )
                                                        && ( profile.name === 'safari'
                                                        || profile.platform === 'mac'
                                                        || profile.name === 'konqueror' ) ) {
                                util.tooltipAccessKeyPrefix = 'ctrl-';

                        // Firefox 2.x and later
                        } else if ( profile.name === 'firefox' && profile.versionBase > '1' ) {
                                util.tooltipAccessKeyPrefix = 'alt-shift-';
                        }

                        /* Fill $content var */
                        util.$content = ( function () {
                                var i, l, $content, selectors;
                                selectors = [
                                        // The preferred standard for setting $content (class="mw-body")
                                        // You may also use (class="mw-body mw-body-primary") if you use
                                        // mw-body in multiple locations.
                                        // Or class="mw-body-primary" if you want $content to be deeper
                                        // in the dom than mw-body
                                        '.mw-body-primary',
                                        '.mw-body',

                                        /* Legacy fallbacks for setting the content */
                                        // Vector, Monobook, Chick, etc... based skins
                                        '#bodyContent',

                                        // Modern based skins
                                        '#mw_contentholder',

                                        // Standard, CologneBlue
                                        '#article',

                                        // #content is present on almost all if not all skins. Most skins (the above cases)
                                        // have #content too, but as an outer wrapper instead of the article text container.
                                        // The skins that don't have an outer wrapper do have #content for everything
                                        // so it's a good fallback
                                        '#content',

                                        // If nothing better is found fall back to our bodytext div that is guaranteed to be here
                                        '#mw-content-text',

                                        // Should never happen... well, it could if someone is not finished writing a skin and has
                                        // not inserted bodytext yet. But in any case <body> should always exist
                                        'body'
                                ];
                                for ( i = 0, l = selectors.length; i < l; i++ ) {
                                        $content = $( selectors[i] ).first();
                                        if ( $content.length ) {
                                                return $content;
                                        }
                                }

                                // Make sure we don't unset util.$content if it was preset and we don't find anything
                                return util.$content;
                        } )();

                        mw.hook( 'wikipage.content' ).fire( util.$content );

                        // Table of contents toggle
                        $tocTitle = $( '#toctitle' );
                        $tocToggleLink = $( '#togglelink' );
                        // Only add it if there is a TOC and there is no toggle added already
                        if ( $( '#toc' ).length && $tocTitle.length && !$tocToggleLink.length ) {
                                hideTocCookie = $.cookie( 'mw_hidetoc' );
                                        $tocToggleLink = $( '<a href="#" class="internal" id="togglelink"></a>' )
                                                .text( mw.msg( 'hidetoc' ) )
                                                .click( function ( e ) {
                                                        e.preventDefault();
                                                        util.toggleToc( $(this) );
                                                } );
                                $tocTitle.append(
                                        $tocToggleLink
                                                .wrap( '<span class="toctoggle"></span>' )
                                                .parent()
                                                        .prepend( '&nbsp;[' )
                                                        .append( ']&nbsp;' )
                                );

                                if ( hideTocCookie === '1' ) {
                                        util.toggleToc( $tocToggleLink );
                                }
                        }
                },

                /* Main body */

                /**
                 * Encode the string like PHP's rawurlencode
                 *
                 * @param {string} str String to be encoded.
                 */
                rawurlencode: function ( str ) {
                        str = String( str );
                        return encodeURIComponent( str )
                                .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
                                .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
                },

                /**
                 * Encode page titles for use in a URL
                 * We want / and : to be included as literal characters in our title URLs
                 * as they otherwise fatally break the title
                 *
                 * @param {string} str String to be encoded.
                 */
                wikiUrlencode: function ( str ) {
                        return util.rawurlencode( str )
                                .replace( /%20/g, '_' ).replace( /%3A/g, ':' ).replace( /%2F/g, '/' );
                },

                /**
                 * Get the link to a page name (relative to `wgServer`),
                 *
                 * @param {string} str Page name to get the link for.
                 * @return {string} Location for a page with name of `str` or boolean false on error.
                 */
                wikiGetlink: function ( str ) {
                        return mw.config.get( 'wgArticlePath' ).replace( '$1',
                                util.wikiUrlencode( typeof str === 'string' ? str : mw.config.get( 'wgPageName' ) ) );
                },

                /**
                 * Get address to a script in the wiki root.
                 * For index.php use `mw.config.get( 'wgScript' )`.
                 *
                 * @since 1.18
                 * @param str string Name of script (eg. 'api'), defaults to 'index'
                 * @return string Address to script (eg. '/w/api.php' )
                 */
                wikiScript: function ( str ) {
                        str = str || 'index';
                        if ( str === 'index' ) {
                                return mw.config.get( 'wgScript' );
                        } else if ( str === 'load' ) {
                                return mw.config.get( 'wgLoadScript' );
                        } else {
                                return mw.config.get( 'wgScriptPath' ) + '/' + str +
                                        mw.config.get( 'wgScriptExtension' );
                        }
                },

                /**
                 * Append a new style block to the head and return the CSSStyleSheet object.
                 * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
                 * This function returns the styleSheet object for convience (due to cross-browsers
                 * difference as to where it is located).
                 *
                 *     var sheet = mw.util.addCSS('.foobar { display: none; }');
                 *     $(foo).click(function () {
                 *         // Toggle the sheet on and off
                 *         sheet.disabled = !sheet.disabled;
                 *     });
                 *
                 * @param {string} text CSS to be appended
                 * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
                 */
                addCSS: function ( text ) {
                        var s = mw.loader.addStyleTag( text );
                        return s.sheet || s;
                },

                /**
                 * Hide/show the table of contents element
                 *
                 * @param {jQuery} $toggleLink A jQuery object of the toggle link.
                 * @param {Function} [callback] Function to be called after the toggle is
                 *  completed (including the animation).
                 * @return {Mixed} Boolean visibility of the toc (true if it's visible)
                 * or Null if there was no table of contents.
                 */
                toggleToc: function ( $toggleLink, callback ) {
                        var $tocList = $( '#toc ul:first' );

                        // This function shouldn't be called if there's no TOC,
                        // but just in case...
                        if ( $tocList.length ) {
                                if ( $tocList.is( ':hidden' ) ) {
                                        $tocList.slideDown( 'fast', callback );
                                        $toggleLink.text( mw.msg( 'hidetoc' ) );
                                        $( '#toc' ).removeClass( 'tochidden' );
                                        $.cookie( 'mw_hidetoc', null, {
                                                expires: 30,
                                                path: '/'
                                        } );
                                        return true;
                                } else {
                                        $tocList.slideUp( 'fast', callback );
                                        $toggleLink.text( mw.msg( 'showtoc' ) );
                                        $( '#toc' ).addClass( 'tochidden' );
                                        $.cookie( 'mw_hidetoc', '1', {
                                                expires: 30,
                                                path: '/'
                                        } );
                                        return false;
                                }
                        } else {
                                return null;
                        }
                },

                /**
                 * Grab the URL parameter value for the given parameter.
                 * Returns null if not found.
                 *
                 * @param {string} param The parameter name.
                 * @param {string} [url=document.location.href] URL to search through, defaulting to the current document's URL.
                 * @return {Mixed} Parameter value or null.
                 */
                getParamValue: function ( param, url ) {
                        if ( url === undefined ) {
                                url = document.location.href;
                        }
                        // Get last match, stop at hash
                        var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
                                m = re.exec( url );
                        if ( m ) {
                                // Beware that decodeURIComponent is not required to understand '+'
                                // by spec, as encodeURIComponent does not produce it.
                                return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
                        }
                        return null;
                },

                /**
                 * @property {string}
                 * Access key prefix. Will be re-defined based on browser/operating system
                 * detection in mw.util#init.
                 */
                tooltipAccessKeyPrefix: 'alt-',

                /**
                 * @property {RegExp}
                 * Regex to match accesskey tooltips.
                 *
                 * Should match:
                 *
                 * - "ctrl-option-"
                 * - "alt-shift-"
                 * - "ctrl-alt-"
                 * - "ctrl-"
                 *
                 * The accesskey is matched in group $6.
                 */
                tooltipAccessKeyRegexp: /\[(ctrl-)?(option-)?(alt-)?(shift-)?(esc-)?(.)\]$/,

                /**
                 * Add the appropriate prefix to the accesskey shown in the tooltip.
                 * If the nodeList parameter is given, only those nodes are updated;
                 * otherwise, all the nodes that will probably have accesskeys by
                 * default are updated.
                 *
                 * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
                 */
                updateTooltipAccessKeys: function ( $nodes ) {
                        if ( !$nodes ) {
                                // Rather than going into a loop of all anchor tags, limit to few elements that
                                // contain the relevant anchor tags.
                                // Input and label are rare enough that no such optimization is needed
                                $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
                        } else if ( !( $nodes instanceof $ ) ) {
                                $nodes = $( $nodes );
                        }

                        $nodes.attr( 'title', function ( i, val ) {
                                if ( val && util.tooltipAccessKeyRegexp.test( val ) ) {
                                        return val.replace( util.tooltipAccessKeyRegexp,
                                                '[' + util.tooltipAccessKeyPrefix + '$6]' );
                                }
                                return val;
                        } );
                },

                /*
                 * @property {jQuery}
                 * A jQuery object that refers to the content area element.
                 * Populated by #init.
                 */
                $content: null,

                /**
                 * Add a link to a portlet menu on the page, such as:
                 *
                 * p-cactions (Content actions), p-personal (Personal tools),
                 * p-navigation (Navigation), p-tb (Toolbox)
                 *
                 * The first three paramters are required, the others are optional and
                 * may be null. Though providing an id and tooltip is recommended.
                 *
                 * By default the new link will be added to the end of the list. To
                 * add the link before a given existing item, pass the DOM node
                 * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
                 * (e.g. `'#foobar'`) for that item.
                 *
                 *     mw.util.addPortletLink(
                 *         'p-tb', 'http://mediawiki.org/',
                 *         'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
                 *     );
                 *
                 * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
                 * @param {string} href Link URL
                 * @param {string} text Link text
                 * @param {string} [id] ID of the new item, should be unique and preferably have
                 *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
                 * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
                 * @param {string} [accesskey] Access key to activate this link (one character, try
                 *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
                 *  see if 'x' is already used.
                 * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
                 *  the new item should be added before, should be another item in the same
                 *  list, it will be ignored otherwise
                 *
                 * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
                 * depending on the skin) or null if no element was added to the document.
                 */
                addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
                        var $item, $link, $portlet, $ul;

                        // Check if there's atleast 3 arguments to prevent a TypeError
                        if ( arguments.length < 3 ) {
                                return null;
                        }
                        // Setup the anchor tag
                        $link = $( '<a>' ).attr( 'href', href ).text( text );
                        if ( tooltip ) {
                                $link.attr( 'title', tooltip );
                        }

                        // Select the specified portlet
                        $portlet = $( '#' + portlet );
                        if ( $portlet.length === 0 ) {
                                return null;
                        }
                        // Select the first (most likely only) unordered list inside the portlet
                        $ul = $portlet.find( 'ul' ).eq( 0 );

                        // If it didn't have an unordered list yet, create it
                        if ( $ul.length === 0 ) {

                                $ul = $( '<ul>' );

                                // If there's no <div> inside, append it to the portlet directly
                                if ( $portlet.find( 'div:first' ).length === 0 ) {
                                        $portlet.append( $ul );
                                } else {
                                        // otherwise if there's a div (such as div.body or div.pBody)
                                        // append the <ul> to last (most likely only) div
                                        $portlet.find( 'div' ).eq( -1 ).append( $ul );
                                }
                        }
                        // Just in case..
                        if ( $ul.length === 0 ) {
                                return null;
                        }

                        // Unhide portlet if it was hidden before
                        $portlet.removeClass( 'emptyPortlet' );

                        // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
                        // and back up the selector to the list item
                        if ( $portlet.hasClass( 'vectorTabs' ) ) {
                                $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
                        } else {
                                $item = $link.wrap( '<li></li>' ).parent();
                        }

                        // Implement the properties passed to the function
                        if ( id ) {
                                $item.attr( 'id', id );
                        }

                        if ( tooltip ) {
                                // Trim any existing accesskey hint and the trailing space
                                tooltip = $.trim( tooltip.replace( util.tooltipAccessKeyRegexp, '' ) );
                                if ( accesskey ) {
                                        tooltip += ' [' + accesskey + ']';
                                }
                                $link.attr( 'title', tooltip );
                                if ( accesskey ) {
                                        util.updateTooltipAccessKeys( $link );
                                }
                        }

                        if ( accesskey ) {
                                $link.attr( 'accesskey', accesskey );
                        }

                        // Where to put our node ?
                        // - nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
                        if ( nextnode && nextnode.parentNode === $ul[0] ) {
                                $( nextnode ).before( $item );

                        // - nextnode is a CSS selector for jQuery
                        } else if ( typeof nextnode === 'string' && $ul.find( nextnode ).length !== 0 ) {
                                $ul.find( nextnode ).eq( 0 ).before( $item );

                        // If the jQuery selector isn't found within the <ul>,
                        // or if nextnode was invalid or not passed at all,
                        // then just append it at the end of the <ul> (this is the default behavior)
                        } else {
                                $ul.append( $item );
                        }

                        return $item[0];
                },

                /**
                 * Add a little box at the top of the screen to inform the user of
                 * something, replacing any previous message.
                 * Calling with no arguments, with an empty string or null will hide the message
                 *
                 * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
                 * to allow CSS/JS to hide different boxes. null = no class used.
                 * @deprecated since 1.20 Use mw#notify
                 */
                jsMessage: function ( message ) {
                        if ( !arguments.length || message === '' || message === null ) {
                                return true;
                        }
                        if ( typeof message !== 'object' ) {
                                message = $.parseHTML( message );
                        }
                        mw.notify( message, { autoHide: true, tag: 'legacy' } );
                        return true;
                },

                /**
                 * Validate a string as representing a valid e-mail address
                 * according to HTML5 specification. Please note the specification
                 * does not validate a domain with one character.
                 *
                 * FIXME: should be moved to or replaced by a validation module.
                 *
                 * @param {string} mailtxt E-mail address to be validated.
                 * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
                 * as determined by validation.
                 */
                validateEmail: function ( mailtxt ) {
                        var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;

                        if ( mailtxt === '' ) {
                                return null;
                        }

                        // HTML5 defines a string as valid e-mail address if it matches
                        // the ABNF:
                        //      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
                        // With:
                        // - atext      : defined in RFC 5322 section 3.2.3
                        // - ldh-str : defined in RFC 1034 section 3.5
                        //
                        // (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68)
                        // First, define the RFC 5322 'atext' which is pretty easy:
                        // atext = ALPHA / DIGIT / ; Printable US-ASCII
                        //     "!" / "#" /    ; characters not including
                        //     "$" / "%" /    ; specials. Used for atoms.
                        //     "&" / "'" /
                        //     "*" / "+" /
                        //     "-" / "/" /
                        //     "=" / "?" /
                        //     "^" / "_" /
                        //     "`" / "{" /
                        //     "|" / "}" /
                        //     "~"
                        rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';

                        // Next define the RFC 1034 'ldh-str'
                        //      <domain> ::= <subdomain> | " "
                        //      <subdomain> ::= <label> | <subdomain> "." <label>
                        //      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
                        //      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
                        //      <let-dig-hyp> ::= <let-dig> | "-"
                        //      <let-dig> ::= <letter> | <digit>
                        rfc1034LdhStr = 'a-z0-9\\-';

                        html5EmailRegexp = new RegExp(
                                // start of string
                                '^'
                                +
                                // User part which is liberal :p
                                '[' + rfc5322Atext + '\\.]+'
                                +
                                // 'at'
                                '@'
                                +
                                // Domain first part
                                '[' + rfc1034LdhStr + ']+'
                                +
                                // Optional second part and following are separated by a dot
                                '(?:\\.[' + rfc1034LdhStr + ']+)*'
                                +
                                // End of string
                                '$',
                                // RegExp is case insensitive
                                'i'
                        );
                        return (null !== mailtxt.match( html5EmailRegexp ) );
                },

                /**
                 * Note: borrows from IP::isIPv4
                 *
                 * @param {string} address
                 * @param {boolean} allowBlock
                 * @return {boolean}
                 */
                isIPv4Address: function ( address, allowBlock ) {
                        if ( typeof address !== 'string' ) {
                                return false;
                        }

                        var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
                                RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
                                RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;

                        return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
                },

                /**
                 * Note: borrows from IP::isIPv6
                 *
                 * @param {string} address
                 * @param {boolean} allowBlock
                 * @return {boolean}
                 */
                isIPv6Address: function ( address, allowBlock ) {
                        if ( typeof address !== 'string' ) {
                                return false;
                        }

                        var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
                                RE_IPV6_ADD =
                        '(?:' + // starts with "::" (including "::")
                        ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
                        '|' + // ends with "::" (except "::")
                        '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
                        '|' + // contains no "::"
                        '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
                        ')';

                        if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
                                return true;
                        }

                        RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
                                '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';

                        return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
                                && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
                }
        };

        mw.util = util;

}( mediaWiki, jQuery ) );