MediaWiki:Common.js

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// Crappy replacement for a JQuery function

function hasClass(el, cl) {
  return (el && el.className ? el.className.indexOf(cl) != -1 : false);
}



/*
 * onDOMReady
 * Copyright (c) 2009 Ryan Morr (ryanmorr.com)
 * Licensed under the MIT license.
 */

(function(win){var timer,doc=win.document,ready=false,setup=false,stack=[];
function onStateChange(e){e=e||win.event;if(e&&e.type&&(/DOMContentLoaded|load/).test(e.type)){
fireDOMReady()}else if(doc.readyState){if((/loaded|complete/).test(doc.readyState)){fireDOMReady()}
else if(doc.documentElement.doScroll){try{ready||doc.documentElement.doScroll('left')}
catch(e){return}fireDOMReady()}}};function fireDOMReady(){if(!ready){
ready=true;for(var i=0,len=stack.length;i<len;i++){stack[i][0].call(stack[i][1])}
if(doc.removeEventListener)doc.removeEventListener("DOMContentLoaded",onStateChange,false);
clearInterval(timer);doc.onreadystatechange=win.onload=timer=null}};win.onDOMReady=function(fn,ctx){
ctx=ctx||win;if(ready){fn.call(ctx);return}if(!setup){setup=true;
if(doc.addEventListener)doc.addEventListener("DOMContentLoaded",onStateChange,false);
timer=setInterval(onStateChange,5);
doc.onreadystatechange=win.onload=onStateChange}stack.push([fn,ctx])}})(this);



/** Collapsible tables *********************************************************
 *
 *  Description: Allows tables to be collapsed, showing only the header. See
 *               [[Wikipedia:NavFrame]].
 *  Maintainers: [[User:R. Koot]]
 *  Modified to not require JQuery - Ber
 */

var autoCollapse = 2;
var collapseCaption = "hide";
var expandCaption = "show";
 
function collapseTable( tableIndex ){
    var Button = document.getElementById( "collapseButton" + tableIndex );
    var Table = document.getElementById( "collapsibleTable" + tableIndex );
 
    if ( !Table || !Button ) {
        return false;
    }
 
    var Rows = Table.rows;
 
    if ( Button.firstChild.data == collapseCaption ) {
        for ( var i = 1; i < Rows.length; i++ ) {
            Rows[i].style.display = "none";
        }
        Button.firstChild.data = expandCaption;
    } else {
        for ( var i = 1; i < Rows.length; i++ ) {
            Rows[i].style.display = Rows[0].style.display;
        }
        Button.firstChild.data = collapseCaption;
    }
}
 
function createCollapseButtons(){
    var tableIndex = 0;
    var NavigationBoxes = new Object();
    var Tables = document.getElementsByTagName( "table" );
 
    for ( var i = 0; i < Tables.length; i++ ) {
        if ( hasClass(Tables[i], "collapsible") ) {
 
            /* only add button and increment count if there is a header row to work with */
            var HeaderRow = Tables[i].getElementsByTagName( "tr" )[0];
            if (!HeaderRow) continue;
            var Header = HeaderRow.getElementsByTagName( "th" )[0];
            if (!Header) continue;
 
            NavigationBoxes[ tableIndex ] = Tables[i];
            Tables[i].setAttribute( "id", "collapsibleTable" + tableIndex );
 
            var Button     = document.createElement( "span" );
            var ButtonLink = document.createElement( "a" );
            var ButtonText = document.createTextNode( collapseCaption );
 
            Button.className = "collapseButton";  //Styles are declared in Common.css
 
            ButtonLink.style.color = Header.style.color;
            ButtonLink.setAttribute( "id", "collapseButton" + tableIndex );
            ButtonLink.setAttribute( "href", "#" );
            ButtonLink.onclick = new Function( "evt", "collapseTable(" + tableIndex + " ); return killEvt( evt );" );
            ButtonLink.appendChild( ButtonText );
 
            Button.appendChild( document.createTextNode( "[" ) );
            Button.appendChild( ButtonLink );
            Button.appendChild( document.createTextNode( "]" ) );
 
            Header.insertBefore( Button, Header.firstChild );
            tableIndex++;
        }
    }
 
    for ( var i = 0;  i < tableIndex; i++ ) {
        if ( hasClass(NavigationBoxes[i], "collapsed") || ( tableIndex >= autoCollapse && hasClass(NavigationBoxes[i], "autocollapse") ) ) {
            collapseTable( i );
        } 
        else if ( hasClass(NavigationBoxes[i], "innercollapse") ) {
            var element = NavigationBoxes[i];
            while (element = element.parentNode) {
                if ( hasClass(element, "outercollapse") ) {
                    collapseTable ( i );
                    break;
                }
            }
        }
    }
}
 
onDOMReady( createCollapseButtons );



/** Dynamic Navigation Bars (experimental) *************************************
 *
 *  Description: See [[Wikipedia:NavFrame]].
 *  Maintainers: UNMAINTAINED
 */
 
// set up the words in your language
var NavigationBarHide = '[' + collapseCaption + ']';
var NavigationBarShow = '[' + expandCaption + ']';
 
// shows and hides content and picture (if available) of navigation bars
// Parameters:
//     indexNavigationBar: the index of navigation bar to be toggled

function toggleNavigationBar(indexNavigationBar){
    var NavToggle = document.getElementById("NavToggle" + indexNavigationBar);
    var NavFrame = document.getElementById("NavFrame" + indexNavigationBar);
 
    if (!NavFrame || !NavToggle) {
        return false;
    }
 
    // if shown now
    if (NavToggle.firstChild.data == NavigationBarHide) {
        for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
            if (hasClass(NavChild, 'NavContent') || hasClass(NavChild, 'NavPic')) {
                NavChild.style.display = 'none';
            }
        }
    NavToggle.firstChild.data = NavigationBarShow;
 
    // if hidden now
    } else if (NavToggle.firstChild.data == NavigationBarShow) {
        for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
            if (hasClass(NavChild, 'NavContent') || hasClass(NavChild, 'NavPic')) {
                NavChild.style.display = 'block';
            }
        }
        NavToggle.firstChild.data = NavigationBarHide;
    }
}
 
// adds show/hide-button to navigation bars
function createNavigationBarToggleButton(){
    var indexNavigationBar = 0;
    // iterate over all < div >-elements 
    var divs = document.getElementsByTagName("div");
    for (var i = 0; NavFrame = divs[i]; i++) {
        // if found a navigation bar
        if (hasClass(NavFrame, "NavFrame")) {
 
            indexNavigationBar++;
            var NavToggle = document.createElement("a");
            NavToggle.className = 'NavToggle';
            NavToggle.setAttribute('id', 'NavToggle' + indexNavigationBar);
            NavToggle.setAttribute('href', 'javascript:toggleNavigationBar(' + indexNavigationBar + ');');
 
            var isCollapsed = hasClass( NavFrame, "collapsed" );
            /*
             * Check if any children are already hidden.  This loop is here for backwards compatibility:
             * the old way of making NavFrames start out collapsed was to manually add style="display:none"
             * to all the NavPic/NavContent elements.  Since this was bad for accessibility (no way to make
             * the content visible without JavaScript support), the new recommended way is to add the class
             * "collapsed" to the NavFrame itself, just like with collapsible tables.
             */
            for (var NavChild = NavFrame.firstChild; NavChild != null && !isCollapsed; NavChild = NavChild.nextSibling) {
                if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
                    if ( NavChild.style.display == 'none' ) {
                        isCollapsed = true;
                    }
                }
            }
            if (isCollapsed) {
                for (var NavChild = NavFrame.firstChild; NavChild != null; NavChild = NavChild.nextSibling) {
                    if ( hasClass( NavChild, 'NavPic' ) || hasClass( NavChild, 'NavContent' ) ) {
                        NavChild.style.display = 'none';
                    }
                }
            }
            var NavToggleText = document.createTextNode(isCollapsed ? NavigationBarShow : NavigationBarHide);
            NavToggle.appendChild(NavToggleText);
 
            // Find the NavHead and attach the toggle link (Must be this complicated because Moz's firstChild handling is borked)
            for(var j=0; j < NavFrame.childNodes.length; j++) {
                if (hasClass(NavFrame.childNodes[j], "NavHead")) {
                    NavToggle.style.color = NavFrame.childNodes[j].style.color;
                    NavFrame.childNodes[j].appendChild(NavToggle);
                }
            }
            NavFrame.setAttribute('id', 'NavFrame' + indexNavigationBar);
        }
    }
}
 
onDOMReady( createNavigationBarToggleButton );



// Thumb preview

var previewBox, previewBoxImg, previewPreloadedImg;

preload = function( src, img ) {
  previewPreloadedImg.tgt = img;
  previewPreloadedImg.src = src;
};

openPreview = function() {
  this.style.position = 'relative';
  this.appendChild(previewBox);
  previewBoxImg.visibility = 'hidden';
  previewBox.style.display = 'block';
  preload( this.childNodes[0].src.replace( /\/[^\/]+$/, '' ).replace( /thumb\//, '' ), previewBoxImg );
};

closePreview = function() {
  previewBox.style.display = 'none';
};

function loadPreview() {
  var anchors = document.querySelectorAll('.preview a.image'),
      i;
  if ( !anchors || !anchors.length ) return;
  // Preview box
  previewBox = document.createElement('div');
  previewBox.id = 'previewBox';
  document.body.appendChild(previewBox);
  // Preview box image
  previewBoxImg = document.createElement('img');
  previewBoxImg.id = 'previewBoxImg';
  previewBox.appendChild(previewBoxImg);
  // Preloader
  previewPreloadedImg = new Image();
  previewPreloadedImg.onload = function() {
    if ( this.tgt ) {
      this.tgt.src = this.src;
      this.tgt.width = this.width;
      this.tgt.height = this.height;
      this.tgt.visibility = 'visible';
    }
  }
  // Attach events
  for ( i=0; i<anchors.length; i++ ) {
    anchors[i].onmouseenter = openPreview;
    anchors[i].onmouseleave = closePreview;
  }; 
}

onDOMReady( loadPreview );
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