Make directory structure better match class hierarchy

src/ol3/tilestore.js

@@ -0,0 +1,101 @@
+goog.provide('ol3.TileStore');
+
+goog.require('ol3.Attribution');
+goog.require('ol3.Store');
+goog.require('ol3.Tile');
+goog.require('ol3.TileCoord');
+goog.require('ol3.TileGrid');
+goog.require('ol3.TileUrlFunctionType');
+
+
+
+/**
+ * @constructor
+ * @extends {ol3.Store}
+ * @param {ol3.Projection} projection Projection.
+ * @param {ol3.TileGrid} tileGrid Tile grid.
+ * @param {ol3.TileUrlFunctionType} tileUrlFunction Tile URL.
+ * @param {ol3.Extent=} opt_extent Extent.
+ * @param {Array.<string>=} opt_attributions Attributions.
+ * @param {?string=} opt_crossOrigin Cross origin.
+ */
+ol3.TileStore = function(projection, tileGrid, tileUrlFunction, opt_extent,
+    opt_attributions, opt_crossOrigin) {
+
+  goog.base(this, projection, opt_extent, opt_attributions);
+
+  /**
+   * @protected
+   * @type {ol3.TileGrid}
+   */
+  this.tileGrid = tileGrid;
+
+  /**
+   * @protected
+   * @type {ol3.TileUrlFunctionType}
+   */
+  this.tileUrlFunction = tileUrlFunction;
+
+  /**
+   * @private
+   * @type {?string}
+   */
+  this.crossOrigin_ = opt_crossOrigin || 'anonymous';
+
+  /**
+   * @private
+   * @type {Object.<string, ol3.Tile>}
+   * FIXME will need to expire elements from this cache
+   * FIXME see elemoine's work with goog.structs.LinkedMap
+   */
+  this.tileCache_ = {};
+
+};
+goog.inherits(ol3.TileStore, ol3.Store);
+
+
+/**
+ * @inheritDoc
+ */
+ol3.TileStore.prototype.getResolutions = function() {
+  return this.tileGrid.getResolutions();
+};
+
+
+/**
+ * @param {ol3.TileCoord} tileCoord Tile coordinate.
+ * @return {ol3.Tile} Tile.
+ */
+ol3.TileStore.prototype.getTile = function(tileCoord) {
+  var key = tileCoord.toString();
+  if (goog.object.containsKey(this.tileCache_, key)) {
+    return this.tileCache_[key];
+  } else {
+    var tileUrl = this.getTileCoordUrl(tileCoord);
+    var tile;
+    if (goog.isDef(tileUrl)) {
+      tile = new ol3.Tile(tileCoord, tileUrl, this.crossOrigin_);
+    } else {
+      tile = null;
+    }
+    this.tileCache_[key] = tile;
+    return tile;
+  }
+};
+
+
+/**
+ * @param {ol3.TileCoord} tileCoord Tile coordinate.
+ * @return {string|undefined} Tile URL.
+ */
+ol3.TileStore.prototype.getTileCoordUrl = function(tileCoord) {
+  return this.tileUrlFunction(tileCoord);
+};
+
+
+/**
+ * @return {ol3.TileGrid} Tile grid.
+ */
+ol3.TileStore.prototype.getTileGrid = function() {
+  return this.tileGrid;
+};