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

7 files changed, 1472 insertions, 0 deletions

diff --git a/misc/openlayers/lib/OpenLayers/Strategy/BBOX.js b/misc/openlayers/lib/OpenLayers/Strategy/BBOX.js
new file mode 100644
index 0000000..e066764
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/BBOX.js
@@ -0,0 +1,290 @@
+/* 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/Strategy.js
+ * @requires OpenLayers/Filter/Spatial.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.BBOX
+ * A simple strategy that reads new features when the viewport invalidates
+ *     some bounds.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.BBOX = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * Property: bounds
+     * {<OpenLayers.Bounds>} The current data bounds (in the same projection
+     *     as the layer - not always the same projection as the map).
+     */
+    bounds: null,
+    
+    /** 
+     * Property: resolution 
+     * {Float} The current data resolution. 
+     */ 
+    resolution: null, 
+           
+    /**
+     * APIProperty: ratio
+     * {Float} The ratio of the data bounds to the viewport bounds (in each
+     *     dimension).  Default is 2.
+     */
+    ratio: 2,
+
+    /** 
+     * Property: resFactor 
+     * {Float} Optional factor used to determine when previously requested 
+     *     features are invalid.  If set, the resFactor will be compared to the
+     *     resolution of the previous request to the current map resolution.
+     *     If resFactor > (old / new) and 1/resFactor < (old / new).  If you
+     *     set a resFactor of 1, data will be requested every time the
+     *     resolution changes.  If you set a resFactor of 3, data will be
+     *     requested if the old resolution is 3 times the new, or if the new is
+     *     3 times the old.  If the old bounds do not contain the new bounds
+     *     new data will always be requested (with or without considering
+     *     resFactor). 
+     */ 
+    resFactor: null, 
+    
+    /**
+     * Property: response
+     * {<OpenLayers.Protocol.Response>} The protocol response object returned
+     *      by the layer protocol.
+     */
+    response: null,
+
+    /**
+     * Constructor: OpenLayers.Strategy.BBOX
+     * Create a new BBOX strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+    
+    /**
+     * Method: activate
+     * Set up strategy with regard to reading new batches of remote data.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully activated.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.call(this);
+        if(activated) {
+            this.layer.events.on({
+                "moveend": this.update,
+                "refresh": this.update,
+                "visibilitychanged": this.update,
+                scope: this
+            });
+            this.update();
+        }
+        return activated;
+    },
+    
+    /**
+     * Method: deactivate
+     * Tear down strategy with regard to reading new batches of remote data.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.layer.events.un({
+                "moveend": this.update,
+                "refresh": this.update,
+                "visibilitychanged": this.update,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+
+    /**
+     * Method: update
+     * Callback function called on "moveend" or "refresh" layer events.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will determine
+     *     the behaviour of this Strategy
+     *
+     * Valid options include:
+     * force - {Boolean} if true, new data must be unconditionally read.
+     * noAbort - {Boolean} if true, do not abort previous requests.
+     */
+    update: function(options) {
+        var mapBounds = this.getMapBounds();
+        if (mapBounds !== null && ((options && options.force) ||
+          (this.layer.visibility && this.layer.calculateInRange() && this.invalidBounds(mapBounds)))) {
+            this.calculateBounds(mapBounds);
+            this.resolution = this.layer.map.getResolution(); 
+            this.triggerRead(options);
+        }
+    },
+    
+    /**
+     * Method: getMapBounds
+     * Get the map bounds expressed in the same projection as this layer.
+     *
+     * Returns:
+     * {<OpenLayers.Bounds>} Map bounds in the projection of the layer.
+     */
+    getMapBounds: function() {
+        if (this.layer.map === null) {
+            return null;
+        }
+        var bounds = this.layer.map.getExtent();
+        if(bounds && !this.layer.projection.equals(
+                this.layer.map.getProjectionObject())) {
+            bounds = bounds.clone().transform(
+                this.layer.map.getProjectionObject(), this.layer.projection
+            );
+        }
+        return bounds;
+    },
+
+    /**
+     * Method: invalidBounds
+     * Determine whether the previously requested set of features is invalid. 
+     *     This occurs when the new map bounds do not contain the previously 
+     *     requested bounds.  In addition, if <resFactor> is set, it will be 
+     *     considered.
+     *
+     * Parameters:
+     * mapBounds - {<OpenLayers.Bounds>} the current map extent, will be
+     *      retrieved from the map object if not provided
+     *
+     * Returns:
+     * {Boolean} 
+     */
+    invalidBounds: function(mapBounds) {
+        if(!mapBounds) {
+            mapBounds = this.getMapBounds();
+        }
+        var invalid = !this.bounds || !this.bounds.containsBounds(mapBounds);
+        if(!invalid && this.resFactor) {
+            var ratio = this.resolution / this.layer.map.getResolution();
+            invalid = (ratio >= this.resFactor || ratio <= (1 / this.resFactor));
+        }
+        return invalid;
+    },
+ 
+    /**
+     * Method: calculateBounds
+     *
+     * Parameters:
+     * mapBounds - {<OpenLayers.Bounds>} the current map extent, will be
+     *      retrieved from the map object if not provided
+     */
+    calculateBounds: function(mapBounds) {
+        if(!mapBounds) {
+            mapBounds = this.getMapBounds();
+        }
+        var center = mapBounds.getCenterLonLat();
+        var dataWidth = mapBounds.getWidth() * this.ratio;
+        var dataHeight = mapBounds.getHeight() * this.ratio;
+        this.bounds = new OpenLayers.Bounds(
+            center.lon - (dataWidth / 2),
+            center.lat - (dataHeight / 2),
+            center.lon + (dataWidth / 2),
+            center.lat + (dataHeight / 2)
+        );
+    },
+    
+    /**
+     * Method: triggerRead
+     *
+     * Parameters:
+     * options - {Object} Additional options for the protocol's read method 
+     *     (optional)
+     *
+     * Returns:
+     * {<OpenLayers.Protocol.Response>} The protocol response object
+     *      returned by the layer protocol.
+     */
+    triggerRead: function(options) {
+        if (this.response && !(options && options.noAbort === true)) {
+            this.layer.protocol.abort(this.response);
+            this.layer.events.triggerEvent("loadend");
+        }
+        var evt = {filter: this.createFilter()};
+        this.layer.events.triggerEvent("loadstart", evt);
+        this.response = this.layer.protocol.read(
+            OpenLayers.Util.applyDefaults({
+                filter: evt.filter,
+                callback: this.merge,
+                scope: this
+        }, options));
+    },
+ 
+    /**
+     * Method: createFilter
+     * Creates a spatial BBOX filter. If the layer that this strategy belongs
+     * to has a filter property, this filter will be combined with the BBOX 
+     * filter.
+     * 
+     * Returns
+     * {<OpenLayers.Filter>} The filter object.
+     */
+    createFilter: function() {
+        var filter = new OpenLayers.Filter.Spatial({
+            type: OpenLayers.Filter.Spatial.BBOX,
+            value: this.bounds,
+            projection: this.layer.projection
+        });
+        if (this.layer.filter) {
+            filter = new OpenLayers.Filter.Logical({
+                type: OpenLayers.Filter.Logical.AND,
+                filters: [this.layer.filter, filter]
+            });
+        }
+        return filter;
+    },
+   
+    /**
+     * Method: merge
+     * Given a list of features, determine which ones to add to the layer.
+     *     If the layer projection differs from the map projection, features
+     *     will be transformed from the layer projection to the map projection.
+     *
+     * Parameters:
+     * resp - {<OpenLayers.Protocol.Response>} The response object passed
+     *      by the protocol.
+     */
+    merge: function(resp) {
+        this.layer.destroyFeatures();
+        if (resp.success()) {
+            var features = resp.features;
+            if(features && features.length > 0) {
+                var remote = this.layer.projection;
+                var local = this.layer.map.getProjectionObject();
+                if(!local.equals(remote)) {
+                    var geom;
+                    for(var i=0, len=features.length; i<len; ++i) {
+                        geom = features[i].geometry;
+                        if(geom) {
+                            geom.transform(remote, local);
+                        }
+                    }
+                }
+                this.layer.addFeatures(features);
+            }
+        } else {
+            this.bounds = null;
+        }
+        this.response = null;
+        this.layer.events.triggerEvent("loadend", {response: resp});
+    },
+   
+    CLASS_NAME: "OpenLayers.Strategy.BBOX" 
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Cluster.js b/misc/openlayers/lib/OpenLayers/Strategy/Cluster.js
new file mode 100644
index 0000000..d478598
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Cluster.js
@@ -0,0 +1,283 @@
+/* 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/Strategy.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Cluster
+ * Strategy for vector feature clustering.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Cluster = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * APIProperty: distance
+     * {Integer} Pixel distance between features that should be considered a
+     *     single cluster.  Default is 20 pixels.
+     */
+    distance: 20,
+    
+    /**
+     * APIProperty: threshold
+     * {Integer} Optional threshold below which original features will be
+     *     added to the layer instead of clusters.  For example, a threshold
+     *     of 3 would mean that any time there are 2 or fewer features in
+     *     a cluster, those features will be added directly to the layer instead
+     *     of a cluster representing those features.  Default is null (which is
+     *     equivalent to 1 - meaning that clusters may contain just one feature).
+     */
+    threshold: null,
+    
+    /**
+     * Property: features
+     * {Array(<OpenLayers.Feature.Vector>)} Cached features.
+     */
+    features: null,
+    
+    /**
+     * Property: clusters
+     * {Array(<OpenLayers.Feature.Vector>)} Calculated clusters.
+     */
+    clusters: null,
+    
+    /**
+     * Property: clustering
+     * {Boolean} The strategy is currently clustering features.
+     */
+    clustering: false,
+    
+    /**
+     * Property: resolution
+     * {Float} The resolution (map units per pixel) of the current cluster set.
+     */
+    resolution: null,
+
+    /**
+     * Constructor: OpenLayers.Strategy.Cluster
+     * Create a new clustering strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+    
+    /**
+     * APIMethod: activate
+     * Activate the strategy.  Register any listeners, do appropriate setup.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully activated.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.call(this);
+        if(activated) {
+            this.layer.events.on({
+                "beforefeaturesadded": this.cacheFeatures,
+                "featuresremoved": this.clearCache,
+                "moveend": this.cluster,
+                scope: this
+            });
+        }
+        return activated;
+    },
+    
+    /**
+     * APIMethod: deactivate
+     * Deactivate the strategy.  Unregister any listeners, do appropriate
+     *     tear-down.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.clearCache();
+            this.layer.events.un({
+                "beforefeaturesadded": this.cacheFeatures,
+                "featuresremoved": this.clearCache,
+                "moveend": this.cluster,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+    
+    /**
+     * Method: cacheFeatures
+     * Cache features before they are added to the layer.
+     *
+     * Parameters:
+     * event - {Object} The event that this was listening for.  This will come
+     *     with a batch of features to be clustered.
+     *     
+     * Returns:
+     * {Boolean} False to stop features from being added to the layer.
+     */
+    cacheFeatures: function(event) {
+        var propagate = true;
+        if(!this.clustering) {
+            this.clearCache();
+            this.features = event.features;
+            this.cluster();
+            propagate = false;
+        }
+        return propagate;
+    },
+    
+    /**
+     * Method: clearCache
+     * Clear out the cached features.
+     */
+    clearCache: function() {
+        if(!this.clustering) {
+            this.features = null;
+        }
+    },
+    
+    /**
+     * Method: cluster
+     * Cluster features based on some threshold distance.
+     *
+     * Parameters:
+     * event - {Object} The event received when cluster is called as a
+     *     result of a moveend event.
+     */
+    cluster: function(event) {
+        if((!event || event.zoomChanged) && this.features) {
+            var resolution = this.layer.map.getResolution();
+            if(resolution != this.resolution || !this.clustersExist()) {
+                this.resolution = resolution;
+                var clusters = [];
+                var feature, clustered, cluster;
+                for(var i=0; i<this.features.length; ++i) {
+                    feature = this.features[i];
+                    if(feature.geometry) {
+                        clustered = false;
+                        for(var j=clusters.length-1; j>=0; --j) {
+                            cluster = clusters[j];
+                            if(this.shouldCluster(cluster, feature)) {
+                                this.addToCluster(cluster, feature);
+                                clustered = true;
+                                break;
+                            }
+                        }
+                        if(!clustered) {
+                            clusters.push(this.createCluster(this.features[i]));
+                        }
+                    }
+                }
+                this.clustering = true;
+                this.layer.removeAllFeatures();
+                this.clustering = false;
+                if(clusters.length > 0) {
+                    if(this.threshold > 1) {
+                        var clone = clusters.slice();
+                        clusters = [];
+                        var candidate;
+                        for(var i=0, len=clone.length; i<len; ++i) {
+                            candidate = clone[i];
+                            if(candidate.attributes.count < this.threshold) {
+                                Array.prototype.push.apply(clusters, candidate.cluster);
+                            } else {
+                                clusters.push(candidate);
+                            }
+                        }
+                    }
+                    this.clustering = true;
+                    // A legitimate feature addition could occur during this
+                    // addFeatures call.  For clustering to behave well, features
+                    // should be removed from a layer before requesting a new batch.
+                    this.layer.addFeatures(clusters);
+                    this.clustering = false;
+                }
+                this.clusters = clusters;
+            }
+        }
+    },
+    
+    /**
+     * Method: clustersExist
+     * Determine whether calculated clusters are already on the layer.
+     *
+     * Returns:
+     * {Boolean} The calculated clusters are already on the layer.
+     */
+    clustersExist: function() {
+        var exist = false;
+        if(this.clusters && this.clusters.length > 0 &&
+           this.clusters.length == this.layer.features.length) {
+            exist = true;
+            for(var i=0; i<this.clusters.length; ++i) {
+                if(this.clusters[i] != this.layer.features[i]) {
+                    exist = false;
+                    break;
+                }
+            }
+        }
+        return exist;
+    },
+    
+    /**
+     * Method: shouldCluster
+     * Determine whether to include a feature in a given cluster.
+     *
+     * Parameters:
+     * cluster - {<OpenLayers.Feature.Vector>} A cluster.
+     * feature - {<OpenLayers.Feature.Vector>} A feature.
+     *
+     * Returns:
+     * {Boolean} The feature should be included in the cluster.
+     */
+    shouldCluster: function(cluster, feature) {
+        var cc = cluster.geometry.getBounds().getCenterLonLat();
+        var fc = feature.geometry.getBounds().getCenterLonLat();
+        var distance = (
+            Math.sqrt(
+                Math.pow((cc.lon - fc.lon), 2) + Math.pow((cc.lat - fc.lat), 2)
+            ) / this.resolution
+        );
+        return (distance <= this.distance);
+    },
+    
+    /**
+     * Method: addToCluster
+     * Add a feature to a cluster.
+     *
+     * Parameters:
+     * cluster - {<OpenLayers.Feature.Vector>} A cluster.
+     * feature - {<OpenLayers.Feature.Vector>} A feature.
+     */
+    addToCluster: function(cluster, feature) {
+        cluster.cluster.push(feature);
+        cluster.attributes.count += 1;
+    },
+    
+    /**
+     * Method: createCluster
+     * Given a feature, create a cluster.
+     *
+     * Parameters:
+     * feature - {<OpenLayers.Feature.Vector>}
+     *
+     * Returns:
+     * {<OpenLayers.Feature.Vector>} A cluster.
+     */
+    createCluster: function(feature) {
+        var center = feature.geometry.getBounds().getCenterLonLat();
+        var cluster = new OpenLayers.Feature.Vector(
+            new OpenLayers.Geometry.Point(center.lon, center.lat),
+            {count: 1}
+        );
+        cluster.cluster = [feature];
+        return cluster;
+    },
+
+    CLASS_NAME: "OpenLayers.Strategy.Cluster" 
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Filter.js b/misc/openlayers/lib/OpenLayers/Strategy/Filter.js
new file mode 100644
index 0000000..721fe52
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Filter.js
@@ -0,0 +1,159 @@
+/* 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/Strategy.js
+ * @requires OpenLayers/Filter.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Filter
+ * Strategy for limiting features that get added to a layer by 
+ *     evaluating a filter.  The strategy maintains a cache of
+ *     all features until removeFeatures is called on the layer.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Filter = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * APIProperty: filter
+     * {<OpenLayers.Filter>}  Filter for limiting features sent to the layer.
+     *     Use the <setFilter> method to update this filter after construction.
+     */
+    filter: null,
+    
+    /**
+     * Property: cache
+     * {Array(<OpenLayers.Feature.Vector>)} List of currently cached
+     *     features.
+     */
+    cache: null,
+    
+    /**
+     * Property: caching
+     * {Boolean} The filter is currently caching features.
+     */
+    caching: false,
+    
+    /**
+     * Constructor: OpenLayers.Strategy.Filter
+     * Create a new filter strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+
+    /**
+     * APIMethod: activate
+     * Activate the strategy.  Register any listeners, do appropriate setup.
+     *     By default, this strategy automatically activates itself when a layer
+     *     is added to a map.
+     *
+     * Returns:
+     * {Boolean} True if the strategy was successfully activated or false if
+     *      the strategy was already active.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.apply(this, arguments);
+        if (activated) {
+            this.cache = [];
+            this.layer.events.on({
+                "beforefeaturesadded": this.handleAdd,
+                "beforefeaturesremoved": this.handleRemove,
+                scope: this
+            });
+        }
+        return activated;
+    },
+    
+    /**
+     * APIMethod: deactivate
+     * Deactivate the strategy.  Clear the feature cache.
+     *
+     * Returns:
+     * {Boolean} True if the strategy was successfully deactivated or false if
+     *      the strategy was already inactive.
+     */
+    deactivate: function() {
+        this.cache = null;
+        if (this.layer && this.layer.events) {
+            this.layer.events.un({
+                "beforefeaturesadded": this.handleAdd,
+                "beforefeaturesremoved": this.handleRemove,
+                scope: this
+            });            
+        }
+        return OpenLayers.Strategy.prototype.deactivate.apply(this, arguments);
+    },
+    
+    /**
+     * Method: handleAdd
+     */
+    handleAdd: function(event) {
+        if (!this.caching && this.filter) {
+            var features = event.features;
+            event.features = [];
+            var feature;
+            for (var i=0, ii=features.length; i<ii; ++i) {
+                feature = features[i];
+                if (this.filter.evaluate(feature)) {
+                    event.features.push(feature);
+                } else {
+                    this.cache.push(feature);
+                }
+            }
+        }
+    },
+    
+    /**
+     * Method: handleRemove
+     */
+    handleRemove: function(event) {
+        if (!this.caching) {
+            this.cache = [];
+        }
+    },
+
+    /** 
+     * APIMethod: setFilter
+     * Update the filter for this strategy.  This will re-evaluate
+     *     any features on the layer and in the cache.  Only features
+     *     for which filter.evalute(feature) returns true will be
+     *     added to the layer.  Others will be cached by the strategy.
+     *
+     * Parameters:
+     * filter - {<OpenLayers.Filter>} A filter for evaluating features.
+     */
+    setFilter: function(filter) {
+        this.filter = filter;
+        var previousCache = this.cache;
+        this.cache = [];
+        // look through layer for features to remove from layer
+        this.handleAdd({features: this.layer.features});
+        // cache now contains features to remove from layer
+        if (this.cache.length > 0) {
+            this.caching = true;
+            this.layer.removeFeatures(this.cache.slice());
+            this.caching = false;
+        }
+        // now look through previous cache for features to add to layer
+        if (previousCache.length > 0) {
+            var event = {features: previousCache};
+            this.handleAdd(event);
+            if (event.features.length > 0) {
+                // event has features to add to layer
+                this.caching = true;
+                this.layer.addFeatures(event.features);
+                this.caching = false;
+            }
+        }
+    },
+
+    CLASS_NAME: "OpenLayers.Strategy.Filter"
+
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js b/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js
new file mode 100644
index 0000000..b06f2cd
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js
@@ -0,0 +1,135 @@
+/* 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/Strategy.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Fixed
+ * A simple strategy that requests features once and never requests new data.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * APIProperty: preload
+     * {Boolean} Load data before layer made visible. Enabling this may result
+     *   in considerable overhead if your application loads many data layers
+     *   that are not visible by default. Default is false.
+     */
+    preload: false,
+
+    /**
+     * Constructor: OpenLayers.Strategy.Fixed
+     * Create a new Fixed strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+
+    /**
+     * Method: activate
+     * Activate the strategy: load data or add listener to load when visible
+     *
+     * Returns:
+     * {Boolean} True if the strategy was successfully activated or false if
+     *      the strategy was already active.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.apply(this, arguments);
+        if(activated) {
+            this.layer.events.on({
+                "refresh": this.load,
+                scope: this
+            });
+            if(this.layer.visibility == true || this.preload) {
+                this.load();
+            } else {
+                this.layer.events.on({
+                    "visibilitychanged": this.load,
+                    scope: this
+                });
+            }
+        }
+        return activated;
+    },
+    
+    /**
+     * Method: deactivate
+     * Deactivate the strategy.  Undo what is done in <activate>.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.layer.events.un({
+                "refresh": this.load,
+                "visibilitychanged": this.load,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+
+    /**
+     * Method: load
+     * Tells protocol to load data and unhooks the visibilitychanged event
+     *
+     * Parameters:
+     * options - {Object} options to pass to protocol read.
+     */
+    load: function(options) {
+        var layer = this.layer;
+        layer.events.triggerEvent("loadstart", {filter: layer.filter});
+        layer.protocol.read(OpenLayers.Util.applyDefaults({
+            callback: this.merge,
+            filter: layer.filter,
+            scope: this
+        }, options));
+        layer.events.un({
+            "visibilitychanged": this.load,
+            scope: this
+        });
+    },
+
+    /**
+     * Method: merge
+     * Add all features to the layer.
+     *     If the layer projection differs from the map projection, features
+     *     will be transformed from the layer projection to the map projection.
+     *
+     * Parameters:
+     * resp - {<OpenLayers.Protocol.Response>} The response object passed
+     *      by the protocol.
+     */
+    merge: function(resp) {
+        var layer = this.layer;
+        layer.destroyFeatures();
+        var features = resp.features;
+        if (features && features.length > 0) {
+            var remote = layer.projection;
+            var local = layer.map.getProjectionObject();
+            if(!local.equals(remote)) {
+                var geom;
+                for(var i=0, len=features.length; i<len; ++i) {
+                    geom = features[i].geometry;
+                    if(geom) {
+                        geom.transform(remote, local);
+                    }
+                }
+            }
+            layer.addFeatures(features);
+        }
+        layer.events.triggerEvent("loadend", {response: resp});
+    },
+
+    CLASS_NAME: "OpenLayers.Strategy.Fixed"
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Paging.js b/misc/openlayers/lib/OpenLayers/Strategy/Paging.js
new file mode 100644
index 0000000..22154fa
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Paging.js
@@ -0,0 +1,233 @@
+/* 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/Strategy.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Paging
+ * Strategy for vector feature paging
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Paging = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * Property: features
+     * {Array(<OpenLayers.Feature.Vector>)} Cached features.
+     */
+    features: null,
+    
+    /**
+     * Property: length
+     * {Integer} Number of features per page.  Default is 10.
+     */
+    length: 10,
+    
+    /**
+     * Property: num
+     * {Integer} The currently displayed page number.
+     */
+    num: null,
+    
+    /**
+     * Property: paging
+     * {Boolean} The strategy is currently changing pages.
+     */
+    paging: false,
+
+    /**
+     * Constructor: OpenLayers.Strategy.Paging
+     * Create a new paging strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+    
+    /**
+     * APIMethod: activate
+     * Activate the strategy.  Register any listeners, do appropriate setup.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully activated.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.call(this);
+        if(activated) {
+            this.layer.events.on({
+                "beforefeaturesadded": this.cacheFeatures,
+                scope: this
+            });
+        }
+        return activated;
+    },
+    
+    /**
+     * APIMethod: deactivate
+     * Deactivate the strategy.  Unregister any listeners, do appropriate
+     *     tear-down.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.clearCache();
+            this.layer.events.un({
+                "beforefeaturesadded": this.cacheFeatures,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+    
+    /**
+     * Method: cacheFeatures
+     * Cache features before they are added to the layer.
+     *
+     * Parameters:
+     * event - {Object} The event that this was listening for.  This will come
+     *     with a batch of features to be paged.
+     */
+    cacheFeatures: function(event) {
+        if(!this.paging) {
+            this.clearCache();
+            this.features = event.features;
+            this.pageNext(event);
+        }
+    },
+    
+    /**
+     * Method: clearCache
+     * Clear out the cached features.  This destroys features, assuming
+     *     nothing else has a reference.
+     */
+    clearCache: function() {
+        if(this.features) {
+            for(var i=0; i<this.features.length; ++i) {
+                this.features[i].destroy();
+            }
+        }
+        this.features = null;
+        this.num = null;
+    },
+    
+    /**
+     * APIMethod: pageCount
+     * Get the total count of pages given the current cache of features.
+     *
+     * Returns:
+     * {Integer} The page count.
+     */
+    pageCount: function() {
+        var numFeatures = this.features ? this.features.length : 0;
+        return Math.ceil(numFeatures / this.length);
+    },
+
+    /**
+     * APIMethod: pageNum
+     * Get the zero based page number.
+     *
+     * Returns:
+     * {Integer} The current page number being displayed.
+     */
+    pageNum: function() {
+        return this.num;
+    },
+
+    /**
+     * APIMethod: pageLength
+     * Gets or sets page length.
+     *
+     * Parameters:
+     * newLength - {Integer} Optional length to be set.
+     *
+     * Returns:
+     * {Integer} The length of a page (number of features per page).
+     */
+    pageLength: function(newLength) {
+        if(newLength && newLength > 0) {
+            this.length = newLength;
+        }
+        return this.length;
+    },
+
+    /**
+     * APIMethod: pageNext
+     * Display the next page of features.
+     *
+     * Returns:
+     * {Boolean} A new page was displayed.
+     */
+    pageNext: function(event) {
+        var changed = false;
+        if(this.features) {
+            if(this.num === null) {
+                this.num = -1;
+            }
+            var start = (this.num + 1) * this.length;
+            changed = this.page(start, event);
+        }
+        return changed;
+    },
+
+    /**
+     * APIMethod: pagePrevious
+     * Display the previous page of features.
+     *
+     * Returns:
+     * {Boolean} A new page was displayed.
+     */
+    pagePrevious: function() {
+        var changed = false;
+        if(this.features) {
+            if(this.num === null) {
+                this.num = this.pageCount();
+            }
+            var start = (this.num - 1) * this.length;
+            changed = this.page(start);
+        }
+        return changed;
+    },
+    
+    /**
+     * Method: page
+     * Display the page starting at the given index from the cache.
+     *
+     * Returns:
+     * {Boolean} A new page was displayed.
+     */
+    page: function(start, event) {
+        var changed = false;
+        if(this.features) {
+            if(start >= 0 && start < this.features.length) {
+                var num = Math.floor(start / this.length);
+                if(num != this.num) {
+                    this.paging = true;
+                    var features = this.features.slice(start, start + this.length);
+                    this.layer.removeFeatures(this.layer.features);
+                    this.num = num;
+                    // modify the event if any
+                    if(event && event.features) {
+                        // this.was called by an event listener
+                        event.features = features;
+                    } else {
+                        // this was called directly on the strategy
+                        this.layer.addFeatures(features);
+                    }
+                    this.paging = false;
+                    changed = true;
+                }
+            }
+        }
+        return changed;
+    },
+    
+    CLASS_NAME: "OpenLayers.Strategy.Paging" 
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Refresh.js b/misc/openlayers/lib/OpenLayers/Strategy/Refresh.js
new file mode 100644
index 0000000..cca187c
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Refresh.js
@@ -0,0 +1,141 @@
+/* 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/Strategy.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Refresh
+ * A strategy that refreshes the layer. By default the strategy waits for a
+ *     call to <refresh> before refreshing.  By configuring the strategy with 
+ *     the <interval> option, refreshing can take place automatically.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Refresh = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * Property: force
+     * {Boolean} Force a refresh on the layer. Default is false.
+     */
+    force: false,
+
+    /**
+     * Property: interval
+     * {Number} Auto-refresh. Default is 0.  If > 0, layer will be refreshed 
+     *     every N milliseconds.
+     */
+    interval: 0,
+    
+    /**
+     * Property: timer
+     * {Number} The id of the timer.
+     */
+    timer: null,
+
+    /**
+     * Constructor: OpenLayers.Strategy.Refresh
+     * Create a new Refresh strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+   
+    /**
+     * APIMethod: activate
+     * Activate the strategy. Register any listeners, do appropriate setup.
+     * 
+     * Returns:
+     * {Boolean} True if the strategy was successfully activated.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.call(this);
+        if(activated) {
+            if(this.layer.visibility === true) {
+                this.start();
+            } 
+            this.layer.events.on({
+                "visibilitychanged": this.reset,
+                scope: this
+            });
+        }
+        return activated;
+    },
+    
+    /**
+     * APIMethod: deactivate
+     * Deactivate the strategy. Unregister any listeners, do appropriate
+     *     tear-down.
+     * 
+     * Returns:
+     * {Boolean} True if the strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.stop();
+            this.layer.events.un({
+                "visibilitychanged": this.reset,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+    
+    /**
+     * Method: reset
+     * Start or cancel the refresh interval depending on the visibility of 
+     *     the layer.
+     */
+    reset: function() {
+        if(this.layer.visibility === true) {
+            this.start();
+        } else {
+            this.stop();
+        }
+    },
+    
+    /**
+     * Method: start
+     * Start the refresh interval. 
+     */
+    start: function() {
+        if(this.interval && typeof this.interval === "number" && 
+            this.interval > 0) {
+
+            this.timer = window.setInterval(
+                OpenLayers.Function.bind(this.refresh, this),
+                this.interval);
+        }
+    },
+    
+    /**
+     * APIMethod: refresh
+     * Tell the strategy to refresh which will refresh the layer.
+     */
+    refresh: function() {
+        if (this.layer && this.layer.refresh && 
+            typeof this.layer.refresh == "function") {
+
+            this.layer.refresh({force: this.force});
+        }
+    },
+   
+    /**
+     * Method: stop
+     * Cancels the refresh interval. 
+     */
+    stop: function() {
+        if(this.timer !== null) {
+            window.clearInterval(this.timer);
+            this.timer = null;
+        }
+    },
+    
+    CLASS_NAME: "OpenLayers.Strategy.Refresh" 
+});
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Save.js b/misc/openlayers/lib/OpenLayers/Strategy/Save.js
new file mode 100644
index 0000000..2211e95
--- /dev/null
+++ b/misc/openlayers/lib/OpenLayers/Strategy/Save.js
@@ -0,0 +1,231 @@
+/* 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/Strategy.js
+ */
+
+/**
+ * Class: OpenLayers.Strategy.Save
+ * A strategy that commits newly created or modified features.  By default
+ *     the strategy waits for a call to <save> before persisting changes.  By
+ *     configuring the strategy with the <auto> option, changes can be saved
+ *     automatically.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Strategy>
+ */
+OpenLayers.Strategy.Save = OpenLayers.Class(OpenLayers.Strategy, {
+    
+    /**
+     * APIProperty: events
+     * {<OpenLayers.Events>} An events object that handles all 
+     *     events on the strategy object.
+     *
+     * Register a listener for a particular event with the following syntax:
+     * (code)
+     * strategy.events.register(type, obj, listener);
+     * (end)
+     *
+     * Supported event types:
+     * start - Triggered before saving
+     * success - Triggered after a successful transaction
+     * fail - Triggered after a failed transaction
+     * 
+     */
+ 
+    /** 
+     * Property: events
+     * {<OpenLayers.Events>} Events instance for triggering this protocol
+     *    events.
+     */
+    events: null,
+    
+    /**
+     * APIProperty: auto
+     * {Boolean | Number} Auto-save.  Default is false.  If true, features will be
+     *     saved immediately after being added to the layer and with each
+     *     modification or deletion.  If auto is a number, features will be
+     *     saved on an interval provided by the value (in seconds).
+     */
+    auto: false,
+    
+    /**
+     * Property: timer
+     * {Number} The id of the timer.
+     */
+    timer: null,
+
+    /**
+     * Constructor: OpenLayers.Strategy.Save
+     * Create a new Save strategy.
+     *
+     * Parameters:
+     * options - {Object} Optional object whose properties will be set on the
+     *     instance.
+     */
+    initialize: function(options) {
+        OpenLayers.Strategy.prototype.initialize.apply(this, [options]);
+        this.events = new OpenLayers.Events(this);
+    },
+   
+    /**
+     * APIMethod: activate
+     * Activate the strategy.  Register any listeners, do appropriate setup.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully activated.
+     */
+    activate: function() {
+        var activated = OpenLayers.Strategy.prototype.activate.call(this);
+        if(activated) {
+            if(this.auto) {
+                if(typeof this.auto === "number") {
+                    this.timer = window.setInterval(
+                        OpenLayers.Function.bind(this.save, this),
+                        this.auto * 1000
+                    );
+                } else {
+                    this.layer.events.on({
+                        "featureadded": this.triggerSave,
+                        "afterfeaturemodified": this.triggerSave,
+                        scope: this
+                    });
+                }
+            }
+        }
+        return activated;
+    },
+    
+    /**
+     * APIMethod: deactivate
+     * Deactivate the strategy.  Unregister any listeners, do appropriate
+     *     tear-down.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            if(this.auto) {
+                if(typeof this.auto === "number") {
+                    window.clearInterval(this.timer);
+                } else {
+                    this.layer.events.un({
+                        "featureadded": this.triggerSave,
+                        "afterfeaturemodified": this.triggerSave,
+                        scope: this
+                    });
+                }
+            }
+        }
+        return deactivated;
+    },
+    
+    /**
+     * Method: triggerSave
+     * Registered as a listener.  Calls save if a feature has insert, update,
+     *     or delete state.
+     *
+     * Parameters:
+     * event - {Object} The event this function is listening for.
+     */
+    triggerSave: function(event) {
+        var feature = event.feature;
+        if(feature.state === OpenLayers.State.INSERT ||
+           feature.state === OpenLayers.State.UPDATE ||
+           feature.state === OpenLayers.State.DELETE) {
+            this.save([event.feature]);
+        }
+    },
+    
+    /**
+     * APIMethod: save
+     * Tell the layer protocol to commit unsaved features.  If the layer
+     *     projection differs from the map projection, features will be
+     *     transformed into the layer projection before being committed.
+     *
+     * Parameters:
+     * features - {Array} Features to be saved.  If null, then default is all
+     *     features in the layer.  Features are assumed to be in the map
+     *     projection.
+     */
+    save: function(features) {
+        if(!features) {
+            features = this.layer.features;
+        }
+        this.events.triggerEvent("start", {features:features});
+        var remote = this.layer.projection;
+        var local = this.layer.map.getProjectionObject();
+        if(!local.equals(remote)) {
+            var len = features.length;
+            var clones = new Array(len);
+            var orig, clone;
+            for(var i=0; i<len; ++i) {
+                orig = features[i];
+                clone = orig.clone();
+                clone.fid = orig.fid;
+                clone.state = orig.state;
+                if(orig.url) {
+                    clone.url = orig.url;
+                }
+                clone._original = orig;
+                clone.geometry.transform(local, remote);
+                clones[i] = clone;
+            }
+            features = clones;
+        }
+        this.layer.protocol.commit(features, {
+            callback: this.onCommit,
+            scope: this
+        });
+    },
+    
+    /**
+     * Method: onCommit
+     * Called after protocol commit.
+     *
+     * Parameters:
+     * response - {<OpenLayers.Protocol.Response>} A response object.
+     */
+    onCommit: function(response) {
+        var evt = {"response": response};
+        if(response.success()) {
+            var features = response.reqFeatures;
+            // deal with inserts, updates, and deletes
+            var state, feature;
+            var destroys = [];
+            var insertIds = response.insertIds || [];
+            var j = 0;
+            for(var i=0, len=features.length; i<len; ++i) {
+                feature = features[i];
+                // if projection was different, we may be dealing with clones
+                feature = feature._original || feature;
+                state = feature.state;
+                if(state) {
+                    if(state == OpenLayers.State.DELETE) {
+                        destroys.push(feature);
+                    } else if(state == OpenLayers.State.INSERT) {
+                        feature.fid = insertIds[j];
+                        ++j;
+                    }
+                    feature.state = null;
+                }
+            }
+
+            if(destroys.length > 0) {
+                this.layer.destroyFeatures(destroys);
+            }
+
+            this.events.triggerEvent("success", evt);
+
+        } else {
+            this.events.triggerEvent("fail", evt);
+        }
+    },
+   
+    CLASS_NAME: "OpenLayers.Strategy.Save" 
+});