MediaWiki:Common.js: Difference between revisions

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/* Any JavaScript here will be loaded for all users on every page load. */
/* Any JavaScript here will be loaded for all users on every page load. */
$(document).ready(function() {


    var
if ( $( '.imageMapHighlighter' ).length && $( '<canvas>' )[ 0 ].getContext ) {
//add this class to all elements created by the script. the reason is that we call the script again on
importScript( 'MediaWiki:Imagemap-Highlight.js' );
//window resize, and use the class to remove all the "artefacts" we created in the previous run.
}
myClassName = 'imageMapHighlighterArtefacts'
, liHighlightClass = 'liHighlighting'
, specialAreaMark = 'area_mark'
, specialLiClassesMark = 'list_classes'
// "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'
, expandLegend = he ? 'הצגת מקרא' : 'ּShow Legend'
, collapseLegend = he ? 'הסתרת המקרא' : 'Hide Legend'
;
 
 
function drawMarker(context, areas) { // mthis 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, fromMap) {
var $this = $(this),
activate = e.type == 'mouseover',
caption = $this.text(),
ol = $this.parent(),
context = ol.data('context'),
special = ol.data(specialAreaMark);
$this.toggleClass(liHighlightClass, activate); // mark/unmark the list item.
context.clearRect(0, 0, context.canvas.width, context.canvas.height); // prepare for a new day.
ol.find('li').each(function() {
var $li = $(this);
var licap = $li.text();
var param;
if (activate && licap === caption) { // highlight!!!
param = special && special.hover  || areaHighLighting;
} else {
param = special && special.nover && (special.nover[licap] || special.nover.default);
}
if (param) {
$.extend(context, param);
drawMarker(context, $li.data('areas'));
}
});
}
 
function handleOneMap() {
var img = $(this),
w = img.width(),
h = img.height(),
map = img.parent().siblings('map:first'),
dims = {position: 'absolute', width: w + 'px', height: h + 'px', border: 0, top:0, left:0},
specialHighlight = img.closest(hilightDivMarker).data(specialAreaMark),
specialLiClasses = img.closest(hilightDivMarker).data(specialLiClassesMark);
if (!($('area', map).length))
return; //not an imagemap, or map with 0 areas.
 
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 the div.
img.fadeTo(1, 0); // make the image transparent - we see canvas and bgimg through it.
// the original, now transparent image is creating our mouse events
var ol = $('<ol>', {'class': myClassName})
.css({clear: 'both', margin: 0, listStyle: 'none', maxWidth: w + 'px', float: 'left', position: 'relative'})
.attr({'data-expandtext' : expandLegend, 'data-collapsetext': collapseLegend})
.data(specialAreaMark, specialHighlight)
.data('context', context);
 
// 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
var someli; // select arbitrary one
$('area', map).each(function() {
var html = mw.html.escape(this.title);
var li = lis[html]; // title already met? use the same li
if (!li) { //no? create a new one.
var href = this.href;
lis[html] = li = $('<li>', {'class': myClassName})
.append($('<a>', {href: href}).html(html)) 
.on('mouseover mouseout', mouseAction)
.data('areas', [])
.addClass(specialLiClasses && (specialLiClasses[html] || specialLiClasses['default']))
.appendTo(ol);
}
li.data('areas').push(this); //add the area to the li
someli = li; // whichever - we just want one...
$(this).on('mouseover mouseout',
function(e) {
li.trigger(e.type, true);
});
});
if (someli) someli.trigger('mouseout');
mw.loader.using('jquery.makeCollapsible').then( function () {
ol.addClass('mw-collapsed')
.makeCollapsible();
});
}
 
function init() {
mw.util.addCSS('li.' + myClassName + '{white-space:nowrap;border:solid 1px transparent;border-radius:6px;}\n' + //css for li element
'li.' +  myClassName + '.' + liHighlightClass + '{background-color:yellow;border-color:green;}\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(handleOneMap);
}
 
//has at least one "imagehighlight" div, and canvas-capable browser:
if ( $(hilightDivMarker).length && $('<canvas>')[0].getContext )
mw.loader.using( ['jquery.makeCollapsible', 'mediawiki.util'] ).done( init );
});

Latest revision as of 05:37, 18 April 2023

/* Any JavaScript here will be loaded for all users on every page load. */

if ( $( '.imageMapHighlighter' ).length && $( '<canvas>' )[ 0 ].getContext ) {
		importScript( 'MediaWiki:Imagemap-Highlight.js' );
}
Retrieved from "https://wiki.ardacraft.me/index.php?title=MediaWiki:Common.js&oldid=194"