MediaWiki:Common.js

 /* Test if an element has a certain class **************************************
  *
  * Description: Uses regular expressions and caching for better performance.
  * Maintainers: [[wikipedia:User:Mike Dillon]], [[wikipedia:User:R. Koot]], [[wikipedia:User:SG]]
  */
 
 var hasClass = (function () {
     var reCache = {};
     return function (element, className) {
         return (reCache[className] ? reCache[className] : (reCache[className] = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"))).test(element.className);
     };
 })();

 /** "Technical restrictions" title fix *****************************************
 *
 * Description:
 * Maintainers: wikipedia:User:Interiot, wikipedia:User:Mets501, wikipedia:User:Freakofnurture
 */
 //
 // For pages that have something like Template:Lowercase, replace the title, but only if it is cut-and-pasteable as a valid wikilink.
 // (for instance iPod's title is updated. But [[C#]] is not an equivalent
 // wikilink, so [[C Sharp]] doesn't have its main title changed)
 // Likewise for users who have selected the U.K. date format ("1 March") the  
 // titles of day-of-the-year articles will appear in that style. Users with any
 // other date setting are not affected.
 //
 // The function looks for a banner like this: 
 // <div id="RealTitleBanner">  ... <span id="RealTitle">title</span> ... </div>
 // An element with id=DisableRealTitle disables the function.
 //
 var disableRealTitle = 0; // users can set disableRealTitle = 1 locally to disable.
 if (wgIsArticle) { // don't display the RealTitle when editing, since it is apparently inconsistent (doesn't show when editing sections, doesn't show when not previewing)
  addOnloadHook(function() {
    try {
        var realTitleBanner = document.getElementById("RealTitleBanner");
        if (realTitleBanner && !document.getElementById("DisableRealTitle") && !disableRealTitle ) {
            var realTitle = document.getElementById("RealTitle");
            if (realTitle) {
                var realTitleHTML = realTitle.innerHTML;
                realTitleText = pickUpText(realTitle);

                var isPasteable = 0;
                //var containsHTML = /</.test(realTitleHTML);    // contains ANY HTML
                var containsTooMuchHTML = /</.test( realTitleHTML.replace(/<\/?(sub|sup|small|big)>/gi, "") ); // contains HTML that will be ignored when cut-n-pasted as a wikilink
                // calculate whether the title is pasteable
                var verifyTitle = realTitleText.replace(/^ +/, "");       // trim left spaces
                verifyTitle = verifyTitle.charAt(0).toUpperCase() + verifyTitle.substring(1, verifyTitle.length);    // uppercase first character
 
                // if the namespace prefix is there, remove it on our verification copy. If it isn't there, add it to the original realValue copy.
                if (wgNamespaceNumber != 0) {
                    if (wgCanonicalNamespace == verifyTitle.substr(0, wgCanonicalNamespace.length).replace(/ /g, "_") && verifyTitle.charAt(wgCanonicalNamespace.length) == ":") {
                        verifyTitle = verifyTitle.substr(wgCanonicalNamespace.length + 1);
                    } else {
                        realTitleText = wgCanonicalNamespace.replace(/_/g, " ") + ":" + realTitleText;
                        realTitleHTML = wgCanonicalNamespace.replace(/_/g, " ") + ":" + realTitleHTML;
                    }
                }
 
                // verify whether wgTitle matches
                verifyTitle = verifyTitle.replace(/[\s_]+/g, " ");      // underscores and multiple spaces to single spaces
                verifyTitle = verifyTitle.replace(/^\s+/, "").replace(/\s+$/, "");        // trim left and right spaces
                verifyTitle = verifyTitle.charAt(0).toUpperCase() + verifyTitle.substring(1, verifyTitle.length);    // uppercase first character
                if ( (verifyTitle == wgTitle) || (verifyTitle == wgTitle.replace(/^(.+)?(January|February|March|April|May|June|July|August|September|October|November|December)\s+([12]?[0-9]|3[0123])([^\d].*)?$/g, "$1$3 $2$4") )) isPasteable = 1;
                var h1 = document.getElementsByTagName("h1")[0];
                if (h1 && isPasteable) {
                    h1.innerHTML = containsTooMuchHTML ? realTitleText : realTitleHTML;
                    if (!containsTooMuchHTML)
                        realTitleBanner.style.display = "none";
                }
                document.title = realTitleText + " - Wikipedia, the free encyclopedia";
            }
        }
    } catch (e) {
        /* Something went wrong. */
    }
  });
 }
 
 // similar to innerHTML, but only returns the text portions of the insides, excludes HTML
 function pickUpText(aParentElement) {
 var str = "";
 
 function pickUpTextInternal(aElement) {
  var child = aElement.firstChild;
  while (child) {
   if (child.nodeType == 1)     // ELEMENT_NODE 
    pickUpTextInternal(child);
   else if (child.nodeType == 3)   // TEXT_NODE
    str += child.nodeValue;
 
   child = child.nextSibling;
  }
 }
 
  pickUpTextInternal(aParentElement);
  return str;
 }
 
 //fix edit summary prompt for undo
 //this code fixes the fact that the undo function combined with the "no edit summary prompter" causes problems if leaving the
 //edit summary unchanged
 //this was added by [[wikipedia:User:Deskana]], code by [[wikipedia:User:Tra]]
 addOnloadHook(function () {
   if (document.location.search.indexOf("undo=") != -1
   && document.getElementsByName('wpAutoSummary')[0]) {
     document.getElementsByName('wpAutoSummary')[0].value='1';
   }
 })

 /** Add dismiss button to watchlist-message *************************************
  *
  *  Description: Hide the watchlist message for one week.
  *  Maintainers: [[wikipedia:User:Ruud Koot|Ruud Koot]]
  */
 
 function addDismissButton() {
    var watchlistMessage = document.getElementById("watchlist-message");
    if ( watchlistMessage == null ) return;
    var watchlistCookieID = watchlistMessage.className.replace(/cookie\-ID\_/ig,'');
 
    if ( document.cookie.indexOf( "hidewatchlistmessage-" + watchlistCookieID + "=yes" ) != -1 ) {
        watchlistMessage.style.display = "none";
    }
 
    var Button     = document.createElement( "span" );
    var ButtonLink = document.createElement( "a" );
    var ButtonText = document.createTextNode( "dismiss" );
 
    ButtonLink.setAttribute( "id", "dismissButton" );
    ButtonLink.setAttribute( "href", "javascript:dismissWatchlistMessage();" );
    ButtonLink.setAttribute( "title", "Hide this message for one week" );
    ButtonLink.appendChild( ButtonText );
 
    Button.appendChild( document.createTextNode( "[" ) );
    Button.appendChild( ButtonLink );
    Button.appendChild( document.createTextNode( "]" ) );
 
    watchlistMessage.appendChild( Button );
 }
 
 function dismissWatchlistMessage() {
    var e = new Date();
    e.setTime( e.getTime() + (7*24*60*60*1000) );
    var watchlistMessage = document.getElementById("watchlist-message");
    var watchlistCookieID = watchlistMessage.className.replace(/cookie\-ID\_/ig,'');
    document.cookie = "hidewatchlistmessage-" + watchlistCookieID + "=yes; expires=" + e.toGMTString() + "; path=/";
    watchlistMessage.style.display = "none";
 }
 
 addOnloadHook( addDismissButton );