MediaWiki:Gadget-ImageMap.js

/*
Questa funzione semplifica l'inserimento di ImageMap, altre informazioni
alla pagina www.mediawiki.org/wiki/Extension:ImageMap, ma soprattutto
in http://meta.wikimedia.org/wiki/User:Dapete/ImageMapEdit#Italiano

Lo script sottostante è importato da //imagemapedit.toolforge.org/ime.js
per evitare il caricamento di elementi esterni alla WMF (in futuro questa
possibilità potrebbe venire limitata o comunque compromessa).
Controllare periodicamente che sia l'ultima versione.
*/
if (mw.config.get("wgNamespaceNumber")==6 && mw.config.get("wgAction")=='view') {
	/*
		Copyright (c) 2007-2013 Peter Schlömer
	
		Released under the following licenses (to make reuse in other Wikis
		easier):
	
		GNU General Public License (GPL), version 2
		GNU Free Documentatin Licence (GFDL), version 1.2 or later
		Creative Commons Attribution ShareAlike (CC-by-sa), version 2 or later
	*/
	
	// Compatibility layer for old versions of MediaWiki
	if (mw === undefined) mw = {};
	if (mw.config === undefined) mw.config = {};
	if (mw.config.get === undefined) {
		mw.config.get = function(key) {
			this[key];
		};
	}
	if (mw.loader === undefined) mw.loader = {};
	if (mw.loader.load === undefined) mw.loader.load = importScriptURI;
	
	
	/*
		Constants
	*/
	
	var IME_BASE = '//imagemapedit.toolforge.org/';
	
	var IME_TEMPLATE = IME_BASE + 'template.php';
	var IME_TRANSLATIONS = IME_BASE + 'translations.php?lang=' + mw.config.get('wgUserLanguage');
	
	// Scripts to create the circle and polygon images
	var IME_CIRCLESCRIPT = IME_BASE + 'circle.php';
	var IME_POLYSCRIPT = IME_BASE + 'poly.php';
	
	/*
		Imports
	*/
	
	// Default error message, will be overwritten if translation is loaded
	var ime_translations = new Array();
	ime_translations['error_imagenotfound'] = 'ImageMapEdit: Could not find image in page structure.';
	
	/*
		Global variables
	*/
	var ime_areas = Array();
	var ime_currentlyEditing = -1;
	var ime_width;
	var ime_height;
	var ime_scale;
	
	/*
		Start Initialization if this is an image page and there actually is an image
	*/
	$(document).ready(function(){
		// Determine whether we are on an image page. Namespace must be 6 and action view
		if (mw.config.get('wgNamespaceNumber')==6 && mw.config.get('wgAction')=='view') {
			// If we can a div with id file, we initialize
			if (document.getElementById('file')) {
				mw.loader.load(IME_TEMPLATE);
				mw.loader.load(IME_TRANSLATIONS);
				ime_init1();
			}
		}
	});
	
	/*
		Create a new div element object with an id.
	*/
	function ime_htmlNewDiv(id) {
		var div = document.createElement('div');
		if (id) div.id = id;
		return div;
	}
	
	/*
		Initialization, part 1: Tries to find image and uses a XMLHttpRequest
		to download information about the image. When this is done (it's an
		asynchronous request) show a link to load the rest of ImageMapEdit
		using ime_init2().
	*/
	function ime_init1() {
		var divFile = document.getElementById('file');
		if (!divFile) {
			ime_error(ime_translations['error_imagenotfound'] + ' (ime_init1,divFile=null)');
			return;
		}
	
		var a = ime_findATag(divFile);
		if (!a) {
			ime_error(ime_translations['error_imagenotfound'] + ' (ime_init1,a=null)');
			return;
		}
	
		var img = a.firstChild;
		if (!img) {
			ime_error(ime_translations['error_imagenotfound'] + ' (ime_init1,img=null)');
			return;
		}
	
		var url = mw.config.get('wgScriptPath') + '/api.php?format=json&action=query&prop=imageinfo&iiprop=size&titles=' + mw.config.get('wgPageName');
	
		$.get(url, function(data) {
			if( typeof data.query.pages != "undefined" ) {
		        	imageProperties = data.query.pages[Object.keys(data.query.pages)[0]];
				ime_width = imageProperties.imageinfo[0].width;
				ime_height = imageProperties.imageinfo[0].height;
	
				ime_scale = img.width/ime_width;
	
				// Show 'show ImageMapEdit' button now
				var a = document.createElement('a');
				a.id = 'imeLink';
				a.href = 'javascript:ime_init2()';
				a.style.display = 'block';
				a.appendChild(document.createTextNode('ImageMapEdit >'));
				document.getElementById('file').appendChild(a);
			}
		});
	}
	
	/*
		Initialization, part 2: Triggered by an external link. Does some moving
		around of the image in the logical structure of the page, then hides the
		link and finally puts the HTML code in place.
	*/
	function ime_init2() {
	
		// Remove UI that might interfere with this code
		ime_removeOtherUIElements();
	
		var divFile = document.getElementById('file');
		var tempNode = divFile.firstChild;
		var a = ime_findATag(tempNode);
		var img = a.firstChild;
	
		var divImeContainer = ime_htmlNewDiv('imeContainer');
		divImeContainer.style.position = 'relative';
	
		// Move image from within link to outside
		a.removeChild(img);
		divFile.insertBefore(divImeContainer,tempNode);
		divFile.removeChild(tempNode);
		// Fix for rtl wikis, thanks to hewiki user "קיפודנחש"
		divFile.style.direction = 'ltr';
	
		img.id = 'imeImg';
		img.style.zIndex = 99;
		img.style.border = 'none';
		img.style.opacity = '0.75';
		img.style.filter = 'alpha(opacity=75)'; // IE
	
		// Internet Explorer needs this differently
		if (typeof(navigator.userAgent) != 'undefined' && navigator.userAgent.match('/MSIE/')) {
			divImeContainer.style.overflow = 'none';
		}
		else {
			divImeContainer.style.overflow = 'auto';
		}
	
		var divImePreview = ime_htmlNewDiv('imePreview');
		divImePreview.style.position = 'absolute';
		divImePreview.style.top = '0';
		divImePreview.style.left = '0';
		divImePreview.style.width = img.width + 'px';
		divImePreview.style.height = img.height + 'px';
		divImePreview.zIndex = 0;
	
		divImeContainer.appendChild(divImePreview);
		divImeContainer.appendChild(img);
	
		var divIme = ime_htmlNewDiv('ime');
		divFile.appendChild(divIme);
	
		// Hide the link now
		document.getElementById('imeLink').style.display = 'none';
	
		// Disable image context menu so right click can be used for events
		img.oncontextmenu = ime_eventDummy;
	
	
		divIme.innerHTML = ime_templateHtml;
	
		// Translate texts
		ime_translate();
	}
	
	/*
		Translate the user interface to the specified language.
	*/
	function ime_translate() {
		if (ime_translations) {
			for (var i in ime_translations) {
				var elements = ime_getElementsByClassName('ime_t_' + i);
				if (elements.length > 0) {
					var text = ime_translations[i];;
					for (var j=0; j<elements.length; j++) {
						elements[j].innerHTML = text;
					}
				}
			}
		}
	}
	
	/*
		Finds all elements in the current document with the specified class.
	*/
	function ime_getElementsByClassName(className) {
		// Hopefully the browser supports this natively
		if (document.getElementsByClassName) {
			return document.getElementsByClassName(className);
		}
	
		// Otherwise use the function defined by MediaWiki
		return getElementsByClassName(document,'*',className)
	}
	
	/*
		Display an error message, either by putting it on the page or - if the
		place to put it does not exist - by showing an alert box.
	*/
	function ime_error(message) {
		var jqFile = $('#file');
		var jqIme = $('#ime');
	
		if (jqFile.length !== 0) {
			var jqImeError = $('<p/>')
			.css({
				'color' : 'darkred',
				'background' : 'white',
				'border' : '1px solid darkred',
				'padding' : '1ex'
			})
			.text(message)
	
			if (jqIme !== 0) {
				jqIme.before(jqImeError);
			} else {
				jqImeError.appendTo(jqFile);
			}
		}
		else {
			window.alert(message);
		}
	}
	
	/*
		Dummy function to intercept events
	*/
	function ime_eventDummy(e) {
		e.cancelBubble = true;
		return false;
	}
	
	/*
		Function to define an object containing rect(angle) coordinates.
	*/
	function ime_RectCoord(x1,y1,x2,y2) {
		this.left = x1;
		this.top = y1;
		this.right = x2;
		this.bottom = y2;
	}
	
	/*
		Function to define an object containing circle coordinates.
	*/
	function ime_CircleCoord(x,y,r) {
		this.x = x;
		this.y = y;
		this.radius = r;
	}
	
	/*
		Function to define an object containing poly(gon) coordinates.
	*/
	function ime_PolyCoord(x,y,r) {
		this.points = Array();
	}
	
	/*
		Function to define an object storing info on a clickable area for the
		imagemap.
	*/
	function ime_Area(shape) {
		if (shape=='rect') {
			this.shape = 'rect';
			this.coords = new ime_RectCoord(0,0,0,0);
		}
		else if (shape=='circle') {
			this.shape = 'circle';
			this.coords = new ime_CircleCoord(0,0,20);
		}
		else {
			this.shape = 'poly';
			this.coords = new ime_PolyCoord();
		}
		this.link = '';
		this.title = '';
	}
	
	/*
		Browser invariant function to get the event "behind" the object passed
		to event handlers.
	*/
	function ime_getEvent(e) {
		if (e) {
			return e;
		}
		else {
			return window.event;
		}
	}
	
	function ime_eventGetX(e) {
		if (typeof(e.layerX)!='undefined') {
			return Math.round(e.layerX / ime_scale);
		}
		if (typeof(e.offsetX)!='undefined') {
			return Math.round(e.offsetX / ime_scale);
		}
		else {
			return Math.round(e.x / ime_scale);
		}
	}
	
	function ime_eventGetY(e) {
		if (typeof(e.layerY)!='undefined') {
			return Math.round(e.layerY / ime_scale);
		}
		if (typeof(e.offsetY)!='undefined') {
			return Math.round(e.offsetY / ime_scale);
		}
		else {
			return Math.round(e.y / ime_scale);
		}
	}
	
	function ime_eventGetButton(e) {
		if (typeof(e.which)!='undefined') {
			return e.which;
		}
		else {
			return e.button;
		}
	}
	
	function ime_mouseEventClear() {
		var img = document.getElementById('imeImg');
		img.onmousedown = null;
		img.style.cursor = '';
	}
	
	function ime_mouseEventSet(func) {
		var img = document.getElementById('imeImg');
		img.onmousedown = func;
		img.style.cursor = 'crosshair';
	}
	
	function ime_eventRect(e) {
		e = ime_getEvent(e);
		var button = ime_eventGetButton(e);
		if (button==1) {
			document.ime.areaRectLeft.value = ime_eventGetX(e);
			document.ime.areaRectTop.value = ime_eventGetY(e);
		}
		else if (button==2 || button==3) {
			document.ime.areaRectRight.value = ime_eventGetX(e);
			document.ime.areaRectBottom.value = ime_eventGetY(e);
		}
		ime_saveArea();
		return false;
	}
	
	function ime_eventCircle(e) {
		e = ime_getEvent(e);
		var button = ime_eventGetButton(e);
		if (button==1) {
			document.ime.areaCircleX.value = ime_eventGetX(e);
			document.ime.areaCircleY.value = ime_eventGetY(e);
		}
		else if (button==2 || button==3) {
			var a = (ime_eventGetX(e) - parseInt(document.ime.areaCircleX.value));
			var b = (ime_eventGetY(e) - parseInt(document.ime.areaCircleY.value));
			document.ime.areaCircleRadius.value = Math.round(Math.sqrt(a*a + b*b));
		}
		ime_saveArea();
		return false;
	}
	
	function ime_eventPoly(e) {
		e = ime_getEvent(e);
		var button = ime_eventGetButton(e);
		if (button==1) {
			area = ime_areas[ime_currentlyEditing];
			area.coords.points.push(ime_eventGetX(e));
			area.coords.points.push(ime_eventGetY(e));
			ime_saveArea();
		}
		return false;
	}
	
	function ime_newArea(shape) {
		var area = new ime_Area(shape);
		area.shape = shape;
		ime_areas.push(area);
	
		ime_currentlyEditing = ime_areas.length-1;
		ime_updateAreas();
		ime_editArea(ime_currentlyEditing);
	}
	
	function ime_updateAreas() {
		ime_updateSelectArea();
		ime_updateMap();
		ime_updateResult();
	}
	
	function ime_updateResult() {
		var arr = document.ime.imageDescriptionPos;
		var imageDescriptionPos = arr[0].value;
		for (var i=1; i<arr.length; i++) {
			if (arr[i].checked) {
				imageDescriptionPos = arr[i].value;
				break;
			}
		}
	
		var result = Array();
		result.push('<imagemap>');
		result.push(mw.config.get('wgPageName') + '|' + document.ime.imageDescription.value);
		result.push('');
		for (var i=0; i<ime_areas.length; i++) {
			var coords = ime_areas[i].coords;
			var s = '';
			if (ime_areas[i].shape=='rect') {
				s = coords.left + ' ' + coords.top + ' ' + coords.right + ' ' + coords.bottom;
			}
			else if (ime_areas[i].shape=='circle') {
				s = coords.x + ' ' + coords.y + ' ' + coords.radius;
			}
			else if (ime_areas[i].shape=='poly') {
				s = coords.points.join(' ');
			}
			result.push(ime_areas[i].shape + ' ' + s + ' [[' + ime_areas[i].link + (ime_areas[i].title ? '|' + ime_areas[i].title : '') + ']]');
		}
		result.push('');
		result.push('desc ' + imageDescriptionPos);
		result.push('</imagemap>');
	
		var preResult = document.getElementById('imeResult');
	
		while (preResult.lastChild) {
			preResult.removeChild(preResult.lastChild);
		}
	
		for (var i=0; i<result.length; i++) {
			preResult.appendChild(document.createTextNode(result[i]));
			preResult.appendChild(document.createElement('br'));
		}
	}
	
	function ime_updateMap() {
		var preview = document.getElementById('imePreview');
		var img = document.getElementById('imeImg');
	
		// Remove areas from map which are out of range
		for (var i=0; i<preview.childNodes.length; i++) {
			var child = preview.childNodes[i];
			var id = parseInt(child.id.substring(10));
			if (id>=ime_areas.length) {
				preview.removeChild(child);
				i--;
			}
		}
	
		for (var i=0; i<ime_areas.length; i++) {
			// Get existing DIV
			var area = ime_areas[i];
			var div = document.getElementById('imePreview' + i);
	
			// If it does not exist exists, create a new one and set style
			if (!div) {
				var div = ime_htmlNewDiv('imePreview' + i)
				preview.appendChild(div);
				div.style.zIndex = 0;
				div.style.position = 'absolute';
				div.style.opacity = 0.5;
				div.style.filter = 'alpha(opacity=50)';
			}
	
			var coords = area.coords;
			if (area.shape == 'rect') {
				div.className = 'previewRect';
				// Only if valid coordinates were given, draw
				if (coords.left<coords.right && coords.top<coords.bottom) {
					div.style.left = Math.round(ime_scale * coords.left) + 'px';
					div.style.top = Math.round(ime_scale * coords.top) + 'px';
					div.style.width = (Math.round(ime_scale * coords.right) - Math.round(ime_scale * coords.left)) + 'px';
					div.style.height = (Math.round(ime_scale * coords.bottom) - Math.round(ime_scale * coords.top)) + 'px';
				}
				else {
					div.style.left = '0';
					div.style.top = '0';
					div.style.width = '0';
					div.style.height = '0';
				}
			}
			else if (area.shape == 'circle') {
				div.className = 'previewCircle';
				div.style.backgroundRepeat = 'no-repeat';
				var left = Math.round(ime_scale * coords.x) - Math.round(ime_scale * coords.radius);
				var top = Math.round(ime_scale * coords.y) - Math.round(ime_scale * coords.radius);
				var size = Math.round(ime_scale * coords.radius * 2) + 1;
	
				div.style.left = left + 'px';
				div.style.top = top + 'px';
	
				if (left + size > img.width) {
					div.style.width = (img.width - left) + 'px';
				}
				else {
					div.style.width = size + 'px';
				}
	
				if (top + size > img.height) {
					div.style.height = (img.height - top) + 'px';
				}
				else {
					div.style.height = size + 'px';
				}
			}
			else if (area.shape == 'poly') {
				// Determine maximum coordinates (this is how big the image is)
				div.className = 'previewPoly';
				div.style.backgroundRepeat = 'no-repeat';
	
				var points = coords.points;
				var minX=0; var maxX=0; var minY=0; var maxY=0;
				if (points.length>0) {
					minX = points[0];
					maxX = points[0];
					minY = points[1];
					maxY = points[1];
					for (var j=2; j<points.length; j+=2) {
						var x = points[j];
						var y = points[j+1];
						if (x<minX) minX = x;
						if (x>maxX) maxX = x;
						if (y<minY) minY = y;
						if (y>maxY) maxY = y;
					}
				}
	
				div.style.left = Math.round(ime_scale * minX) + 'px';
				div.style.top = Math.round(ime_scale * minY) + 'px';
				div.style.width = (Math.round(ime_scale * maxX) - Math.round(ime_scale * minX)) + 'px';
				div.style.height = (Math.round(ime_scale * maxY) - Math.round(ime_scale * minY)) + 'px';
			}
		}
	
		ime_highlightMap();
	}
	
	function ime_highlightMapCircle(div,radius,highlight) {
		var background = "url('" + IME_CIRCLESCRIPT + '?' + (highlight ? 'active=1&' : '') + 'radius=' +  Math.round(ime_scale * radius) + "') no-repeat";
		if (div.style.background != background) {
			div.style.background = background;
		}
	}
	
	function ime_highlightMapPoly(div,points,highlight) {
		var minX=0; var minY=0;
		if (points.length>0) {
			minX = points[0];
			minY = points[1];
			for (var j=2; j<points.length; j+=2) {
				var x = points[j];
				var y = points[j+1];
				if (x<minX) minX = x;
				if (y<minY) minY = y;
			}
		}
		var convpoints = Array();
		for(var j=0; j<points.length; j+=2) {
			convpoints[j] = Math.round(ime_scale * points[j]) - Math.round(ime_scale * minX);
			convpoints[j+1] = Math.round(ime_scale * points[j+1]) - Math.round(ime_scale * minY);
		}
		var background = "url('" + IME_POLYSCRIPT + '?' + (highlight ? 'active=1&' : '') + 'coords=' + convpoints.join("|") + "') no-repeat";
		if (div.style.background != background) {
			div.style.background = background;
		}
	}
	
	function ime_highlightMap() {
		for (var i=0; i<ime_areas.length; i++) {
			var div = document.getElementById('imePreview' + i);
			var area = ime_areas[i];
			if (div && area) {
				if (i==ime_currentlyEditing) {
					div.style.opacity = '0.9';
					div.style.filter = 'alpha(opacity=90)'; // IE
				} else {
					div.style.opacity = '0.75';
					div.style.filter = 'alpha(opacity=75)'; // IE
				}
				if (area.shape == 'rect') {
					var backgroundColor = (i==ime_currentlyEditing) ? 'red' : 'black';
					if (div.style.backgroundColor != backgroundColor) div.style.backgroundColor = backgroundColor;
				}
				else if (area.shape == 'circle') {
					ime_highlightMapCircle(div,area.coords.radius,(i==ime_currentlyEditing));
				}
				else if (area.shape == 'poly') {
					ime_highlightMapPoly(div,area.coords.points,(i==ime_currentlyEditing));
				}
			}
		}
	}
	
	function ime_updateSelectArea() {
		var selectArea = document.ime.area;
	
		while (selectArea.childNodes.length>0) {
			selectArea.removeChild(selectArea.lastChild);
		}
	
		for (var i=0; i<ime_areas.length; i++) {
			var option = document.createElement('option');
			var area = ime_areas[i];
				option.value = i;
			while (option.childNodes.length>0) {
				option.removeChild(option.lastChild);
			}
			var text = (area.title ? area.title : area.link) + ' [' + area.shape + ']';
			option.appendChild(document.createTextNode(text));
			if (i == ime_currentlyEditing) {
				option.selected = 'selected';
			}
			selectArea.appendChild(option);
		}
	}
	
	function ime_editArea(index) {
		document.getElementById('imeProps').style.display = 'none';
	
		var area = ime_areas[index];
	
		if (area) {
			ime_currentlyEditing = index;
	
			document.getElementById('imeProps').style.display = '';
			document.getElementById('imePropsRect').style.display = 'none';
			document.getElementById('imePropsCircle').style.display = 'none';
			document.getElementById('imePropsPoly').style.display= 'none';
			ime_mouseEventClear();
	
			if (area.shape == 'rect') {
				document.getElementById('imePropsRect').style.display = '';
				ime_mouseEventSet(ime_eventRect);
			}
			else if (area.shape == 'circle') {
				document.getElementById('imePropsCircle').style.display = '';
				ime_mouseEventSet(ime_eventCircle);
			}
			else if (area.shape == 'poly') {
				document.getElementById('imePropsPoly').style.display = '';
				ime_mouseEventSet(ime_eventPoly);
			}
	
			document.ime.areaLink.value = area.link;
			document.ime.areaTitle.value = area.title;
	
			var coords = area.coords;
			if (area.shape == 'rect') {
				document.ime.areaRectLeft.value = coords.left;
				document.ime.areaRectTop.value = coords.top;
				document.ime.areaRectRight.value = coords.right;
				document.ime.areaRectBottom.value = coords.bottom;
			}
			else if (area.shape == 'circle') {
				document.ime.areaCircleX.value = coords.x;
				document.ime.areaCircleY.value = coords.y;
				document.ime.areaCircleRadius.value = coords.radius;
			}
			else if (area.shape == 'poly') {
				var propsPolyCoords = document.getElementById('imePropsPolyCoords');
				if (propsPolyCoords.childNodes.length > 0) propsPolyCoords.removeChild(propsPolyCoords.lastChild);
				propsPolyCoords.appendChild(document.createTextNode(area.coords.points.join(", ")));
			}
	
			ime_highlightMap();
		}
	}
	
	function ime_deletePolyCoords() {
		ime_areas[ime_currentlyEditing].coords.points = Array();
		ime_saveArea();
	}
	
	function ime_saveArea() {
		var area = ime_areas[ime_currentlyEditing];
		area.link = document.ime.areaLink.value;
		area.title = document.ime.areaTitle.value;
	
		var coords = area.coords;
		if (area.shape=='rect') {
			coords.left = parseInt(document.ime.areaRectLeft.value);
			coords.top = parseInt(document.ime.areaRectTop.value);
			coords.right = parseInt(document.ime.areaRectRight.value);
			coords.bottom = parseInt(document.ime.areaRectBottom.value);
		}
		else if (area.shape=='circle') {
			if (parseInt(document.ime.areaCircleRadius.value) < 0) document.ime.areaCircleRadius.value = 0;
			coords.x = parseInt(document.ime.areaCircleX.value);
			coords.y = parseInt(document.ime.areaCircleY.value);
			coords.radius = parseInt(document.ime.areaCircleRadius.value);
		}
		else if (area.shape == 'poly') {
			var propsPolyCoords = document.getElementById('imePropsPolyCoords');
			if (propsPolyCoords.childNodes.length > 0) propsPolyCoords.removeChild(propsPolyCoords.lastChild);
			propsPolyCoords.appendChild(document.createTextNode(coords.points.join(", ")));
		}
	
		ime_updateAreas();
	}
	
	function ime_deleteArea() {
		ime_mouseEventClear();
	
		// Remove element from ime_areas array
		ime_areas.splice(ime_currentlyEditing,1);
	
		// Remove preview div of the deleted area
		var div = document.getElementById('imePreview' + ime_currentlyEditing);
		if (div) {
			div.parentNode.removeChild(div);
		}
	
		// Move ids of preview divs to fill the hole
		for (var i=ime_currentlyEditing+1; i<ime_areas.length; i++) {
			div = document.getElementById('imePreview' + i);
			if (div) {
				div.id = 'imePreview' + (i-1);
			}
		}
	
		// If we deleted the last area, correct currently editing
		if (ime_currentlyEditing>=ime_areas.length) {
			ime_currentlyEditing = ime_areas.length-1;
		}
	
		ime_updateAreas();
		ime_editArea(ime_currentlyEditing);
	}
	
	function ime_importLines() {
		var text = document.ime.importText.value;
		var lines = text.split("\n");
	
		for (var i=0; i<lines.length; i++) {
			var rectMatch = /rect +(\d+) +(\d+) +(\d+) +(\d+) +\[\[([^|]*)(|(.*))?\]\]/i;
			var circleMatch = /circle +(\d+) +(\d+) +(\d+) +\[\[([^|]*)(|(.*))?\]\]/i;
			var polyMatch = /poly +(.*?) +\[\[([^|]*)(|(.*))?\]\]/i;
	
			var line = lines[i];
	
			if (rectMatch.test(line)) {
				var results = rectMatch.exec(line);
				var area = new ime_Area("rect");
				area.coords.left = parseInt(results[1]);
				area.coords.top = parseInt(results[2]);
				area.coords.right = parseInt(results[3]);
				area.coords.bottom = parseInt(results[4]);
				area.link = results[5];
				if (results[6]) area.title = results[6].substring(1);
				ime_areas.push(area);
			}
			else if (circleMatch.test(line)) {
				var results = circleMatch.exec(line);
				var area = new ime_Area("circle");
				area.coords.x = parseInt(results[1]);
				area.coords.y = parseInt(results[2]);
				area.coords.radius = parseInt(results[3]);
				area.link = results[4];
				if (results[5]) area.title = results[5].substring(1);
				ime_areas.push(area);
			}
			else if (polyMatch.test(line)) {
				var results = polyMatch.exec(line);
				var area = new ime_Area("poly");
				area.coords.points = results[1].replace(/ +/," ").split(" ");
				for (var j=0; j<area.coords.points.length; j++) {
					area.coords.points[j] = parseInt(area.coords.points[j]);
				}
				area.link = results[2];
				if (results[3]) area.title = results[3].substring(1);
				ime_areas.push(area);
			}
		}
		ime_updateAreas();
		ime_hideImport();
	}
	
	function ime_showImport() {
		$('#imeImport').show();
		$('#imeImportShow').hide();
		$('#imeImportHide').show();
	}
	
	function ime_hideImport() {
		$('#imeImport').hide();
		$('#imeImportShow').show();
		$('#imeImportHide').hide();
	}
	
	/*
		Remove all UI elements that might interfere with ImageMapEdit.
	*/
	function ime_removeOtherUIElements() {
		// Remove all UI elements of the 'annotations' feature used on Wikimedia
		// Commons.
		$('#ImageAnnotationAddButton').remove();
	}
	
	/*
		Try to find an <a> tag within the specified HTML document node.
	*/
	function ime_findATag(node) {
		// We just look at the first child until there is none or it is an <a> tag
		var a = node;
		while (a != null && a.nodeName.toUpperCase() != 'A') {
			a = a.firstChild;
		}
		return a;
	}
}