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

1 files changed, 233 insertions, 0 deletions

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" 
+});