Commit TMS support from 'crschmidt/refractions' Ticket #394 , reviewed by

Schuyler. git-svn-id: http://svn.openlayers.org/trunk/openlayers@1927 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
2006-11-19 19:54:42 +00:00
parent 71bcdb9b7c
commit 5e7b2e03f1
7 changed files with 333 additions and 1 deletions
--- a/lib/OpenLayers/Layer/TMS.js
+++ b/lib/OpenLayers/Layer/TMS.js
@@ -0,0 +1,112 @@
+/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD licence.
+ * See http://svn.openlayers.org/trunk/openlayers/repository-license.txt 
+ * for the full text of the license. */
+
+
+/**
+ * @class
+ * 
+ * @requires OpenLayers/Layer/Grid.js
+ */
+OpenLayers.Layer.TMS = OpenLayers.Class.create();
+OpenLayers.Layer.TMS.prototype = 
+  OpenLayers.Class.inherit( OpenLayers.Layer.Grid, {
+
+    
+    reproject: false,
+    isBaseLayer: true,
+    tileOrigin: null,
+
+    /**
+    * @constructor
+    *
+    * @param {String} name
+    * @param {String} url
+    * @param {Object} params
+    * @param {Object} options Hashtable of extra options to tag onto the layer
+    */
+    initialize: function(name, url, options) {
+        var newArguments = new Array();
+        newArguments.push(name, url, {}, options);
+        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
+    },    
+
+    /**
+     * 
+     */
+    destroy: function() {
+        // for now, nothing special to do here. 
+        OpenLayers.Layer.Grid.prototype.destroy.apply(this, arguments);  
+    },
+
+    
+    /**
+     * @param {Object} obj
+     * 
+     * @returns An exact clone of this OpenLayers.Layer.TMS
+     * @type OpenLayers.Layer.TMS
+     */
+    clone: function (obj) {
+        
+        if (obj == null) {
+            obj = new OpenLayers.Layer.TMS(this.name,
+                                           this.url,
+                                           this.options);
+        }
+
+        //get all additions from superclasses
+        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
+
+        // copy/set any non-init, non-simple values here
+
+        return obj;
+    },    
+    
+    /**
+     * @param {OpenLayers.Bounds} bounds
+     * 
+     * @returns A string with the layer's url and parameters and also the 
+     *           passed-in bounds and appropriate tile size specified as 
+     *           parameters
+     * @type String
+     */
+    getURL: function (bounds) {
+        var res = this.map.getResolution();
+        var x = (bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w);
+        var y = (bounds.bottom - this.tileOrigin.lat) / (res * this.tileSize.h);
+        var z = this.map.getZoom();
+        return this.url + "1.0.0" + "/" + this.layername + "/" + z + "/" + x + "/" + y + "." + this.type; 
+    },
+
+    /**
+    * addTile creates a tile, initializes it, and 
+    * adds it to the layer div. 
+    *
+    * @param {OpenLayers.Bounds} bounds
+    *
+    * @returns The added OpenLayers.Tile.Image
+    * @type OpenLayers.Tile.Image
+    */
+    addTile:function(bounds,position) {
+        var url = this.getURL(bounds);
+        return new OpenLayers.Tile.Image(this, position, bounds, 
+                                             url, this.tileSize);
+    },
+
+    /** When the layer is added to a map, then we can fetch our origin 
+     *  (if we don't have one.) 
+     * 
+     * @param {OpenLayers.Map} map
+     */
+    setMap: function(map) {
+        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
+        if (!this.tileOrigin) { 
+            this.tileOrigin = new OpenLayers.LonLat(this.map.maxExtent.left,
+                                                this.map.maxExtent.bottom);
+        }                                       
+    },
+
+    
+    /** @final @type String */
+    CLASS_NAME: "OpenLayers.Layer.TMS"
+});