ee1455c399
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.5-rc4@4799 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
141 lines
3.8 KiB
JavaScript
141 lines
3.8 KiB
JavaScript
/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*
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* Class: OpenLayers.Control.Permalink
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*
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
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/**
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* Property: element
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* {DOMElement}
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*/
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element: null,
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/**
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* APIProperty: base
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* {String}
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*/
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base: '',
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/**
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* Constructor: OpenLayers.Control.Permalink
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*
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* Parameters:
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* element - {DOMElement}
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* base - {String}
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* options - {Object} options to the control.
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*/
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initialize: function(element, base, options) {
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OpenLayers.Control.prototype.initialize.apply(this, [options]);
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this.element = OpenLayers.Util.getElement(element);
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this.base = base || document.location.href;
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},
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/**
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* APIMethod: destroy
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*/
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destroy: function() {
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if (this.element.parentNode == this.div) {
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this.div.removeChild(this.element);
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}
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this.element = null;
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this.map.events.unregister('moveend', this, this.updateLink);
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OpenLayers.Control.prototype.destroy.apply(this, arguments);
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},
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/**
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* Method: setMap
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* Set the map property for the control.
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*
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* Parameters:
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* map - {<OpenLayers.Map>}
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*/
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setMap: function(map) {
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OpenLayers.Control.prototype.setMap.apply(this, arguments);
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//make sure we have an arg parser attached
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for(var i=0; i< this.map.controls.length; i++) {
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var control = this.map.controls[i];
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if (control.CLASS_NAME == "OpenLayers.Control.ArgParser") {
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break;
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}
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}
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if (i == this.map.controls.length) {
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this.map.addControl(new OpenLayers.Control.ArgParser());
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}
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},
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/**
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* Method: draw
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*
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* Returns:
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* {DOMElement}
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*/
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draw: function() {
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OpenLayers.Control.prototype.draw.apply(this, arguments);
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if (!this.element) {
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this.div.className = this.displayClass;
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this.element = document.createElement("a");
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this.element.style.fontSize="smaller";
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this.element.innerHTML = "Permalink";
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this.element.href="";
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this.div.appendChild(this.element);
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}
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this.map.events.register('moveend', this, this.updateLink);
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this.map.events.register('changelayer', this, this.updateLink);
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this.map.events.register('changebaselayer', this, this.updateLink);
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return this.div;
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},
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/**
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* Method: updateLink
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*/
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updateLink: function() {
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var center = this.map.getCenter();
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// Map not initialized yet. Break out of this function.
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if (!center) {
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return;
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}
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var params = OpenLayers.Util.getParameters(this.base);
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params.zoom = this.map.getZoom();
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params.lat = Math.round(center.lat*100000)/100000;
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params.lon = Math.round(center.lon*100000)/100000;
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params.layers = '';
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for(var i=0; i< this.map.layers.length; i++) {
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var layer = this.map.layers[i];
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if (layer.isBaseLayer) {
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params.layers += (layer == this.map.baseLayer) ? "B" : "0";
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} else {
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params.layers += (layer.getVisibility()) ? "T" : "F";
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}
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}
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var href = this.base;
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if( href.indexOf('?') != -1 ){
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href = href.substring( 0, href.indexOf('?') );
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}
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href += '?' + OpenLayers.Util.getParameterString(params);
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this.element.href = href;
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},
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CLASS_NAME: "OpenLayers.Control.Permalink"
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});
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