1 files changed, 135 insertions, 0 deletions
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"
+});