2.255
Bearbeitungen
MediaWiki:Common.js: Unterschied zwischen den Versionen
Zur Navigation springen
Zur Suche springen
MediaWiki:Common.js (Quelltext anzeigen)
Version vom 23. Juni 2014, 21:30 Uhr
, 21:30, 23. Jun. 2014keine Bearbeitungszusammenfassung
KMA (Diskussion | Beiträge) (Die Seite wurde geleert.) |
KMA (Diskussion | Beiträge) |
||
| Zeile 1: | Zeile 1: | ||
$(document).ready(function() { | |||
var | |||
//add this class to all elements created by the script. the reason is that we call the script again on | |||
//window resize, and use the class to remove all the "artefacts" we created in the previous run. | |||
myClassName = 'imageMapHighlighterArtefacts' | |||
, liHighlightClass = 'liHighlighting' | |||
// "2d context" attributes used for highlighting. | |||
, areaHighLighting = {fillStyle: 'rgba(0,0,0,0.35)', strokeStyle: 'yellow', lineJoin: 'round', lineWidth: 2} | |||
//every imagemap that wants highlighting, should reside in a div of this 'class': | |||
, hilightDivMarker = '.imageMapHighlighter' | |||
// specifically for wikis - redlinks tooltip adds this message | |||
, he = mw && mw.config && mw.config.get('wgUserLanguage') == 'he' | |||
, pageDoesntExistMessage = he ? ' (הדף אינו קיים)' : ' (page does not exist)' | |||
, expandLegend = he ? 'הצגת מקרא' : 'ּShow Legend' | |||
, collapseLegend = he ? 'הסתרת המקרא' : 'Hide Legend' | |||
; | |||
function drawMarker(context, areas) { // this is where the magic is done. | |||
function drawPoly(coords) { | |||
context.moveTo(coords.shift(), coords.shift()); | |||
while (coords.length) | |||
context.lineTo(coords.shift(), coords.shift()); | |||
} | |||
for (var i in areas) { | |||
var coords = areas[i].coords.split(','); | |||
context.beginPath(); | |||
switch (areas[i].shape) { | |||
case 'rect': drawPoly([coords[0], coords[1], coords[0], coords[3], coords[2], coords[3], coords[2], coords[1]]); break; | |||
case 'circle': context.arc(coords[0],coords[1],coords[2],0,Math.PI*2); break;//x,y,r,startAngle,endAngle | |||
case 'poly': drawPoly(coords); break; | |||
} | |||
context.closePath(); | |||
context.stroke(); | |||
context.fill(); | |||
} | |||
} | |||
function mouseAction(e) { | |||
var $this = $(this), | |||
context = $this.data('context'), | |||
activate = e.type == 'mouseover', | |||
li = $this.prop('tagName') == 'LI'; | |||
if (li && activate) { // in this case, we need to test visibility vis a vis scrolling | |||
var height = $this.height(), | |||
ol = $this.parent(), | |||
top = $this.position().top; | |||
if (top < 0 || top + height > ol.height()) | |||
ol.animate({scrollTop: ol.scrollTop() + top - ol.height() / 2}); | |||
} | |||
$this.toggleClass(liHighlightClass, activate); | |||
context.clearRect(0, 0, context.canvas.width, context.canvas.height); | |||
if (activate) { | |||
drawMarker(context, $this.data('areas')); | |||
if ($.client.profile().name === 'msie') { // ie9: dimwit needs to be told twice. | |||
context.clearRect(0, 0, context.canvas.width, context.canvas.height); | |||
drawMarker(context, $this.data('areas')); | |||
} | |||
} | |||
} | |||
// massage the area "href" and create a human legible string to be used as the tooltip of "li" | |||
function pageOfHref(href, cssClass) { | |||
var page = href.replace(document.location.protocol + wgServer + "/wiki/", '').replace(/.*\/\//, '').replace(/_/g, ' '); | |||
page = page.replace(/#(.*)/, function(toReplace){return toReplace.replace(/\.([\dA-F]{2})/g, '%$1');}); | |||
page = decodeURIComponent(page); // used for "title" of legends - just like "normal" wiki links. | |||
if (cssClass.indexOf('new') + 1) | |||
page += pageDoesntExistMessage; | |||
return page; | |||
} | |||
function init() { | |||
appendCSS('li.' + myClassName + '{white-space:nowrap;}\n' + //css for li element | |||
'li.' + liHighlightClass + '{background-color:yellow;}\n' + //css for highlighted li element. | |||
'.rtl li.' + myClassName + '{float: right; margin-left: 3em;}\n' + | |||
'.ltr li.' + myClassName + '{float: left; margin-right: 3em;}'); | |||
$(hilightDivMarker+ ' img').each(function() { | |||
var img = $(this), map = img.siblings('map:first'); | |||
if (!('area', map).length) | |||
return; //not an imagemap. inside "each" anonymous function, 'return' means "continue". | |||
var w = img.width(), h = img.height(); | |||
var dims = {position: 'absolute', width: w + 'px', height: h + 'px', border: 0, top:0, left:0}; | |||
var jcanvas = $('<canvas>', {'class': myClassName}) | |||
.css(dims) | |||
.attr({width: w, height: h}); | |||
var bgimg = $('<img>', {'class': myClassName, src: img.attr('src')}) | |||
.css(dims);//completely inert image. this is what we see. | |||
var context = $.extend(jcanvas[0].getContext("2d"), areaHighLighting); | |||
// this is where the magic is done: prepare a sandwich of the inert bgimg at the bottom, | |||
// the canvas above it, and the original, image, on top. | |||
// so canvas won't steal the mouse events. | |||
// pack them all TIGHTLY in a newly minted "relative" div, so when page chnage | |||
// (other scripts adding elements, window resize etc.), canvas and imagese remain aligned. | |||
var div = $('<div>').css({position: 'relative', width: w + 'px', height: h + 'px'}); | |||
img.before(div); // put the div just above the image, and ... | |||
div.append(bgimg) // place the background image in the div | |||
.append(jcanvas)// and the canvas. both are "absolute", so they don't occupy space in the div | |||
.append(img); // now yank the original image from the window and place it on top. | |||
img.fadeTo(1, 0); // make the image transparent - we see canvas and bgimg through it. | |||
var ol = $('<ol>', {'class': myClassName}) | |||
.css({clear: 'both', margin: 0, listStyle: 'none', maxHeight: '24em', maxWidth: w + 'px', overflowY: 'auto', position: 'relative'}) | |||
.attr({'data-expandtext' : expandLegend, 'data-collapsetext': collapseLegend}); | |||
// ol below image, hr below ol. original caption pushed below hr. | |||
div.after($('<hr>', {'class': myClassName}).css('clear', 'both')).after(ol); | |||
var lis = {}; //collapse areas with same caption to one list item | |||
$('area', map).each(function() { | |||
var $this = $(this), text = this.title; | |||
var li = lis[text]; // title already met? use the same li | |||
if (!li) { //no? create a new one. | |||
var href = this.href, cssClass = this['class'] || ''; | |||
lis[text] = li = $('<li>', {'class': myClassName}) | |||
.append($('<a>', {href: href, title: pageOfHref(href, cssClass), text: text, 'class': cssClass})) | |||
.bind('mouseover mouseout', mouseAction) | |||
.data('areas', []) | |||
.data('context', context) | |||
.appendTo(ol); | |||
} | |||
li.data('areas').push(this); //add the area to the li | |||
$(this).bind('mouseover mouseout', function(e) {li.trigger(e);}) | |||
}); | |||
ol.addClass('mw-collapsed') | |||
.makeCollapsible(); | |||
}); | |||
} | |||
//has at least one "imagehighlight" div, and canvas-capable browser: | |||
if ($(hilightDivMarker).length && $('<canvas>')[0].getContext) | |||
mw.loader.using('jquery.makeCollapsible', init); | |||
}); | |||