Adding jquery, flot and openlayers to be included with the GEM.v0.0.4

1 files changed, 257 insertions, 0 deletions

diff --git a/misc/openlayers/lib/OpenLayers/Control/CacheWrite.js b/misc/openlayers/lib/OpenLayers/Control/CacheWrite.js
new file mode 100644
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--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Control/CacheWrite.js
@@ -0,0 +1,257 @@
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/Control.js
+ * @requires OpenLayers/Request.js
+ * @requires OpenLayers/Console.js
+ */
+
+/**
+ * Class: OpenLayers.Control.CacheWrite
+ * A control for caching image tiles in the browser's local storage. The
+ * <OpenLayers.Control.CacheRead> control is used to fetch and use the cached
+ * tile images.
+ *
+ * Note: Before using this control on any layer that is not your own, make sure
+ * that the terms of service of the tile provider allow local storage of tiles.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Control>
+ */
+OpenLayers.Control.CacheWrite = OpenLayers.Class(OpenLayers.Control, {
+    
+    /** 
+     * APIProperty: events
+     * {<OpenLayers.Events>} Events instance for listeners and triggering
+     *     control specific events.
+     *
+     * To register events in the constructor, configure <eventListeners>.
+     *
+     * Register a listener for a particular event with the following syntax:
+     * (code)
+     * control.events.register(type, obj, listener);
+     * (end)
+     *
+     * Supported event types (in addition to those from <OpenLayers.Control.events>):
+     * cachefull - Triggered when the cache is full. Listeners receive an
+     *     object with a tile property as first argument. The tile references
+     *     the tile that couldn't be cached.
+     */
+    
+    /**
+     * APIProperty: eventListeners
+     * {Object} Object with event listeners, keyed by event name. An optional
+     *     scope property defines the scope that listeners will be executed in.
+     */
+
+    /**
+     * APIProperty: layers
+     * {Array(<OpenLayers.Layer.Grid>)}. Optional. If provided, caching
+     *     will be enabled for these layers only, otherwise for all cacheable
+     *     layers.
+     */
+    layers: null,
+    
+    /**
+     * APIProperty: imageFormat
+     * {String} The image format used for caching. The default is "image/png".
+     *     Supported formats depend on the user agent. If an unsupported
+     *     <imageFormat> is provided, "image/png" will be used. For aerial
+     *     imagery, "image/jpeg" is recommended.
+     */
+    imageFormat: "image/png",
+    
+    /**
+     * Property: quotaRegEx
+     * {RegExp}
+     */
+    quotaRegEx: (/quota/i),
+    
+    /**
+     * Constructor: OpenLayers.Control.CacheWrite
+     *
+     * Parameters:
+     * options - {Object} Object with API properties for this control.
+     */
+
+    /** 
+     * Method: setMap
+     * Set the map property for the control. 
+     * 
+     * Parameters:
+     * map - {<OpenLayers.Map>} 
+     */
+    setMap: function(map) {
+        OpenLayers.Control.prototype.setMap.apply(this, arguments);
+        var i, layers = this.layers || map.layers;
+        for (i=layers.length-1; i>=0; --i) {
+            this.addLayer({layer: layers[i]});
+        }
+        if (!this.layers) {
+            map.events.on({
+                addlayer: this.addLayer,
+                removeLayer: this.removeLayer,
+                scope: this
+            });
+        }
+    },
+    
+    /**
+     * Method: addLayer
+     * Adds a layer to the control. Once added, tiles requested for this layer
+     *     will be cached.
+     *
+     * Parameters:
+     * evt - {Object} Object with a layer property referencing an
+     *     <OpenLayers.Layer> instance
+     */
+    addLayer: function(evt) {
+        evt.layer.events.on({
+            tileloadstart: this.makeSameOrigin,
+            tileloaded: this.onTileLoaded,
+            scope: this
+        });        
+    },
+    
+    /**
+     * Method: removeLayer
+     * Removes a layer from the control. Once removed, tiles requested for this
+     *     layer will no longer be cached.
+     *
+     * Parameters:
+     * evt - {Object} Object with a layer property referencing an
+     *     <OpenLayers.Layer> instance
+     */
+    removeLayer: function(evt) {
+        evt.layer.events.un({
+            tileloadstart: this.makeSameOrigin,
+            tileloaded: this.onTileLoaded,
+            scope: this
+        });
+    },
+
+    /**
+     * Method: makeSameOrigin
+     * If the tile does not have CORS image loading enabled and is from a
+     * different origin, use OpenLayers.ProxyHost to make it a same origin url.
+     *
+     * Parameters:
+     * evt - {<OpenLayers.Event>}
+     */
+    makeSameOrigin: function(evt) {
+        if (this.active) {
+            var tile = evt.tile;
+            if (tile instanceof OpenLayers.Tile.Image &&
+                    !tile.crossOriginKeyword &&
+                    tile.url.substr(0, 5) !== "data:") {
+                var sameOriginUrl = OpenLayers.Request.makeSameOrigin(
+                    tile.url, OpenLayers.ProxyHost
+                );
+                OpenLayers.Control.CacheWrite.urlMap[sameOriginUrl] = tile.url;
+                tile.url = sameOriginUrl;
+            }
+        }
+    },
+    
+    /**
+     * Method: onTileLoaded
+     * Decides whether a tile can be cached and calls the cache method.
+     *
+     * Parameters:
+     * evt - {Event}
+     */
+    onTileLoaded: function(evt) {
+        if (this.active && !evt.aborted &&
+                evt.tile instanceof OpenLayers.Tile.Image &&
+                evt.tile.url.substr(0, 5) !== 'data:') {
+            this.cache({tile: evt.tile});
+            delete OpenLayers.Control.CacheWrite.urlMap[evt.tile.url];
+        }
+    },
+    
+    /**
+     * Method: cache
+     * Adds a tile to the cache. When the cache is full, the "cachefull" event
+     * is triggered.
+     *
+     * Parameters:
+     * obj - {Object} Object with a tile property, tile being the
+     *     <OpenLayers.Tile.Image> with the data to add to the cache
+     */
+    cache: function(obj) {
+        if (window.localStorage) {
+            var tile = obj.tile;
+            try {
+                var canvasContext = tile.getCanvasContext();
+                if (canvasContext) {
+                    var urlMap = OpenLayers.Control.CacheWrite.urlMap;
+                    var url = urlMap[tile.url] || tile.url;
+                    window.localStorage.setItem(
+                        "olCache_" + url,
+                        canvasContext.canvas.toDataURL(this.imageFormat)
+                    );
+                }
+            } catch(e) {
+                // local storage full or CORS violation
+                var reason = e.name || e.message;
+                if (reason && this.quotaRegEx.test(reason)) {
+                    this.events.triggerEvent("cachefull", {tile: tile});
+                } else {
+                    OpenLayers.Console.error(e.toString());
+                }
+            }
+        }
+    },
+    
+    /**
+     * Method: destroy
+     * The destroy method is used to perform any clean up before the control
+     * is dereferenced.  Typically this is where event listeners are removed
+     * to prevent memory leaks.
+     */
+    destroy: function() {
+        if (this.layers || this.map) {
+            var i, layers = this.layers || this.map.layers;
+            for (i=layers.length-1; i>=0; --i) {
+                this.removeLayer({layer: layers[i]});
+            }
+        }
+        if (this.map) {
+            this.map.events.un({
+                addlayer: this.addLayer,
+                removeLayer: this.removeLayer,
+                scope: this
+            });
+        }
+        OpenLayers.Control.prototype.destroy.apply(this, arguments);
+    },
+    
+    CLASS_NAME: "OpenLayers.Control.CacheWrite"
+});
+
+/**
+ * APIFunction: OpenLayers.Control.CacheWrite.clearCache
+ * Clears all tiles cached with <OpenLayers.Control.CacheWrite> from the cache.
+ */
+OpenLayers.Control.CacheWrite.clearCache = function() {
+    if (!window.localStorage) { return; }
+    var i, key;
+    for (i=window.localStorage.length-1; i>=0; --i) {
+        key = window.localStorage.key(i);
+        if (key.substr(0, 8) === "olCache_") {
+            window.localStorage.removeItem(key);
+        }
+    }
+};
+
+/**
+ * Property: OpenLayers.Control.CacheWrite.urlMap
+ * {Object} Mapping of same origin urls to cache url keys. Entries will be
+ *     deleted as soon as a tile was cached.
+ */
+OpenLayers.Control.CacheWrite.urlMap = {};
+
+