Upgrading openlayers to 3.x

1 files changed, 0 insertions, 1377 deletions

diff --git a/misc/openlayers/lib/OpenLayers/Layer.js b/misc/openlayers/lib/OpenLayers/Layer.js
deleted file mode 100644
index 3bd4186..0000000
--- a/misc/openlayers/lib/OpenLayers/Layer.js
+++ /dev/null
@@ -1,1377 +0,0 @@
-/* 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/BaseTypes/Class.js
- * @requires OpenLayers/Map.js
- * @requires OpenLayers/Projection.js
- */
-
-/**
- * Class: OpenLayers.Layer
- */
-OpenLayers.Layer = OpenLayers.Class({
-
-    /**
-     * APIProperty: id
-     * {String}
-     */
-    id: null,
-
-    /** 
-     * APIProperty: name
-     * {String}
-     */
-    name: null,
-
-    /** 
-     * APIProperty: div
-     * {DOMElement}
-     */
-    div: null,
-
-    /**
-     * APIProperty: opacity
-     * {Float} The layer's opacity. Float number between 0.0 and 1.0. Default
-     * is 1.
-     */
-    opacity: 1,
-
-    /**
-     * APIProperty: alwaysInRange
-     * {Boolean} If a layer's display should not be scale-based, this should 
-     *     be set to true. This will cause the layer, as an overlay, to always 
-     *     be 'active', by always returning true from the calculateInRange() 
-     *     function. 
-     * 
-     *     If not explicitly specified for a layer, its value will be 
-     *     determined on startup in initResolutions() based on whether or not 
-     *     any scale-specific properties have been set as options on the 
-     *     layer. If no scale-specific options have been set on the layer, we 
-     *     assume that it should always be in range.
-     * 
-     *     See #987 for more info.
-     */
-    alwaysInRange: null,   
-
-    /**
-     * Constant: RESOLUTION_PROPERTIES
-     * {Array} The properties that are used for calculating resolutions
-     *     information.
-     */
-    RESOLUTION_PROPERTIES: [
-        'scales', 'resolutions',
-        'maxScale', 'minScale',
-        'maxResolution', 'minResolution',
-        'numZoomLevels', 'maxZoomLevel'
-    ],
-
-    /**
-     * APIProperty: events
-     * {<OpenLayers.Events>}
-     *
-     * Register a listener for a particular event with the following syntax:
-     * (code)
-     * layer.events.register(type, obj, listener);
-     * (end)
-     *
-     * Listeners will be called with a reference to an event object.  The
-     *     properties of this event depends on exactly what happened.
-     *
-     * All event objects have at least the following properties:
-     * object - {Object} A reference to layer.events.object.
-     * element - {DOMElement} A reference to layer.events.element.
-     *
-     * Supported map event types:
-     * loadstart - Triggered when layer loading starts.  When using a Vector 
-     *     layer with a Fixed or BBOX strategy, the event object includes 
-     *     a *filter* property holding the OpenLayers.Filter used when 
-     *     calling read on the protocol.
-     * loadend - Triggered when layer loading ends.  When using a Vector layer
-     *     with a Fixed or BBOX strategy, the event object includes a 
-     *     *response* property holding an OpenLayers.Protocol.Response object.
-     * visibilitychanged - Triggered when the layer's visibility property is
-     *     changed, e.g. by turning the layer on or off in the layer switcher.
-     *     Note that the actual visibility of the layer can also change if it
-     *     gets out of range (see <calculateInRange>). If you also want to catch
-     *     these cases, register for the map's 'changelayer' event instead.
-     * move - Triggered when layer moves (triggered with every mousemove
-     *     during a drag).
-     * moveend - Triggered when layer is done moving, object passed as
-     *     argument has a zoomChanged boolean property which tells that the
-     *     zoom has changed.
-     * added - Triggered after the layer is added to a map.  Listeners will
-     *     receive an object with a *map* property referencing the map and a
-     *     *layer* property referencing the layer.
-     * removed - Triggered after the layer is removed from the map.  Listeners
-     *     will receive an object with a *map* property referencing the map and
-     *     a *layer* property referencing the layer.
-     */
-    events: null,
-
-    /**
-     * APIProperty: map
-     * {<OpenLayers.Map>} This variable is set when the layer is added to 
-     *     the map, via the accessor function setMap().
-     */
-    map: null,
-    
-    /**
-     * APIProperty: isBaseLayer
-     * {Boolean} Whether or not the layer is a base layer. This should be set 
-     *     individually by all subclasses. Default is false
-     */
-    isBaseLayer: false,
- 
-    /**
-     * Property: alpha
-     * {Boolean} The layer's images have an alpha channel.  Default is false.
-     */
-    alpha: false,
-
-    /** 
-     * APIProperty: displayInLayerSwitcher
-     * {Boolean} Display the layer's name in the layer switcher.  Default is
-     *     true.
-     */
-    displayInLayerSwitcher: true,
-
-    /**
-     * APIProperty: visibility
-     * {Boolean} The layer should be displayed in the map.  Default is true.
-     */
-    visibility: true,
-
-    /**
-     * APIProperty: attribution
-     * {String} Attribution string, displayed when an 
-     *     <OpenLayers.Control.Attribution> has been added to the map.
-     */
-    attribution: null, 
-
-    /** 
-     * Property: inRange
-     * {Boolean} The current map resolution is within the layer's min/max 
-     *     range. This is set in <OpenLayers.Map.setCenter> whenever the zoom 
-     *     changes.
-     */
-    inRange: false,
-    
-    /**
-     * Propery: imageSize
-     * {<OpenLayers.Size>} For layers with a gutter, the image is larger than 
-     *     the tile by twice the gutter in each dimension.
-     */
-    imageSize: null,
-    
-  // OPTIONS
-
-    /** 
-     * Property: options
-     * {Object} An optional object whose properties will be set on the layer.
-     *     Any of the layer properties can be set as a property of the options
-     *     object and sent to the constructor when the layer is created.
-     */
-    options: null,
-
-    /**
-     * APIProperty: eventListeners
-     * {Object} If set as an option at construction, the eventListeners
-     *     object will be registered with <OpenLayers.Events.on>.  Object
-     *     structure must be a listeners object as shown in the example for
-     *     the events.on method.
-     */
-    eventListeners: null,
-
-    /**
-     * APIProperty: gutter
-     * {Integer} Determines the width (in pixels) of the gutter around image
-     *     tiles to ignore.  By setting this property to a non-zero value,
-     *     images will be requested that are wider and taller than the tile
-     *     size by a value of 2 x gutter.  This allows artifacts of rendering
-     *     at tile edges to be ignored.  Set a gutter value that is equal to
-     *     half the size of the widest symbol that needs to be displayed.
-     *     Defaults to zero.  Non-tiled layers always have zero gutter.
-     */ 
-    gutter: 0, 
-
-    /**
-     * APIProperty: projection
-     * {<OpenLayers.Projection>} or {<String>} Specifies the projection of the layer.
-     *     Can be set in the layer options. If not specified in the layer options,
-     *     it is set to the default projection specified in the map,
-     *     when the layer is added to the map.
-     *     Projection along with default maxExtent and resolutions
-     *     are set automatically with commercial baselayers in EPSG:3857,
-     *     such as Google, Bing and OpenStreetMap, and do not need to be specified.
-     *     Otherwise, if specifying projection, also set maxExtent,
-     *     maxResolution or resolutions as appropriate.
-     *     When using vector layers with strategies, layer projection should be set
-     *     to the projection of the source data if that is different from the map default.
-     * 
-     *     Can be either a string or an <OpenLayers.Projection> object;
-     *     if a string is passed, will be converted to an object when
-     *     the layer is added to the map.
-     * 
-     */
-    projection: null,    
-    
-    /**
-     * APIProperty: units
-     * {String} The layer map units.  Defaults to null.  Possible values
-     *     are 'degrees' (or 'dd'), 'm', 'ft', 'km', 'mi', 'inches'.
-     *     Normally taken from the projection.
-     *     Only required if both map and layers do not define a projection,
-     *     or if they define a projection which does not define units.
-     */
-    units: null,
-
-    /**
-     * APIProperty: scales
-     * {Array}  An array of map scales in descending order.  The values in the
-     *     array correspond to the map scale denominator.  Note that these
-     *     values only make sense if the display (monitor) resolution of the
-     *     client is correctly guessed by whomever is configuring the
-     *     application.  In addition, the units property must also be set.
-     *     Use <resolutions> instead wherever possible.
-     */
-    scales: null,
-
-    /**
-     * APIProperty: resolutions
-     * {Array} A list of map resolutions (map units per pixel) in descending
-     *     order.  If this is not set in the layer constructor, it will be set
-     *     based on other resolution related properties (maxExtent,
-     *     maxResolution, maxScale, etc.).
-     */
-    resolutions: null,
-    
-    /**
-     * APIProperty: maxExtent
-     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
-     *     should consist of four values (left, bottom, right, top).
-     *     The maximum extent for the layer.  Defaults to null.
-     * 
-     *     The center of these bounds will not stray outside
-     *     of the viewport extent during panning.  In addition, if
-     *     <displayOutsideMaxExtent> is set to false, data will not be
-     *     requested that falls completely outside of these bounds.
-     */
-    maxExtent: null,
-    
-    /**
-     * APIProperty: minExtent
-     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
-     *     should consist of four values (left, bottom, right, top).
-     *     The minimum extent for the layer.  Defaults to null.
-     */
-    minExtent: null,
-    
-    /**
-     * APIProperty: maxResolution
-     * {Float} Default max is 360 deg / 256 px, which corresponds to
-     *     zoom level 0 on gmaps.  Specify a different value in the layer 
-     *     options if you are not using the default <OpenLayers.Map.tileSize>
-     *     and displaying the whole world.
-     */
-    maxResolution: null,
-
-    /**
-     * APIProperty: minResolution
-     * {Float}
-     */
-    minResolution: null,
-
-    /**
-     * APIProperty: numZoomLevels
-     * {Integer}
-     */
-    numZoomLevels: null,
-    
-    /**
-     * APIProperty: minScale
-     * {Float}
-     */
-    minScale: null,
-    
-    /**
-     * APIProperty: maxScale
-     * {Float}
-     */
-    maxScale: null,
-
-    /**
-     * APIProperty: displayOutsideMaxExtent
-     * {Boolean} Request map tiles that are completely outside of the max 
-     *     extent for this layer. Defaults to false.
-     */
-    displayOutsideMaxExtent: false,
-
-    /**
-     * APIProperty: wrapDateLine
-     * {Boolean} Wraps the world at the international dateline, so the map can
-     * be panned infinitely in longitudinal direction. Only use this on the
-     * base layer, and only if the layer's maxExtent equals the world bounds.
-     * #487 for more info.   
-     */
-    wrapDateLine: false,
-    
-    /**
-     * Property: metadata
-     * {Object} This object can be used to store additional information on a
-     *     layer object.
-     */
-    metadata: null,
-    
-    /**
-     * Constructor: OpenLayers.Layer
-     *
-     * Parameters:
-     * name - {String} The layer name
-     * options - {Object} Hashtable of extra options to tag onto the layer
-     */
-    initialize: function(name, options) {
-
-        this.metadata = {};
-        
-        options = OpenLayers.Util.extend({}, options);
-        // make sure we respect alwaysInRange if set on the prototype
-        if (this.alwaysInRange != null) {
-            options.alwaysInRange = this.alwaysInRange;
-        }
-        this.addOptions(options);
-
-        this.name = name;
-        
-        if (this.id == null) {
-
-            this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
-
-            this.div = OpenLayers.Util.createDiv(this.id);
-            this.div.style.width = "100%";
-            this.div.style.height = "100%";
-            this.div.dir = "ltr";
-
-            this.events = new OpenLayers.Events(this, this.div);
-            if(this.eventListeners instanceof Object) {
-                this.events.on(this.eventListeners);
-            }
-
-        }
-    },
-    
-    /**
-     * Method: destroy
-     * Destroy is a destructor: this is to alleviate cyclic references which
-     *     the Javascript garbage cleaner can not take care of on its own.
-     *
-     * Parameters:
-     * setNewBaseLayer - {Boolean} Set a new base layer when this layer has
-     *     been destroyed.  Default is true.
-     */
-    destroy: function(setNewBaseLayer) {
-        if (setNewBaseLayer == null) {
-            setNewBaseLayer = true;
-        }
-        if (this.map != null) {
-            this.map.removeLayer(this, setNewBaseLayer);
-        }
-        this.projection = null;
-        this.map = null;
-        this.name = null;
-        this.div = null;
-        this.options = null;
-
-        if (this.events) {
-            if(this.eventListeners) {
-                this.events.un(this.eventListeners);
-            }
-            this.events.destroy();
-        }
-        this.eventListeners = null;
-        this.events = null;
-    },
-    
-   /**
-    * Method: clone
-    *
-    * Parameters:
-    * obj - {<OpenLayers.Layer>} The layer to be cloned
-    *
-    * Returns:
-    * {<OpenLayers.Layer>} An exact clone of this <OpenLayers.Layer>
-    */
-    clone: function (obj) {
-        
-        if (obj == null) {
-            obj = new OpenLayers.Layer(this.name, this.getOptions());
-        }
-        
-        // catch any randomly tagged-on properties
-        OpenLayers.Util.applyDefaults(obj, this);
-        
-        // a cloned layer should never have its map property set
-        //  because it has not been added to a map yet. 
-        obj.map = null;
-        
-        return obj;
-    },
-    
-    /**
-     * Method: getOptions
-     * Extracts an object from the layer with the properties that were set as
-     *     options, but updates them with the values currently set on the
-     *     instance.
-     * 
-     * Returns:
-     * {Object} the <options> of the layer, representing the current state.
-     */
-    getOptions: function() {
-        var options = {};
-        for(var o in this.options) {
-            options[o] = this[o];
-        }
-        return options;
-    },
-    
-    /** 
-     * APIMethod: setName
-     * Sets the new layer name for this layer.  Can trigger a changelayer event
-     *     on the map.
-     *
-     * Parameters:
-     * newName - {String} The new name.
-     */
-    setName: function(newName) {
-        if (newName != this.name) {
-            this.name = newName;
-            if (this.map != null) {
-                this.map.events.triggerEvent("changelayer", {
-                    layer: this,
-                    property: "name"
-                });
-            }
-        }
-    },    
-    
-   /**
-    * APIMethod: addOptions
-    * 
-    * Parameters:
-    * newOptions - {Object}
-    * reinitialize - {Boolean} If set to true, and if resolution options of the
-    *     current baseLayer were changed, the map will be recentered to make
-    *     sure that it is displayed with a valid resolution, and a
-    *     changebaselayer event will be triggered.
-    */
-    addOptions: function (newOptions, reinitialize) {
-
-        if (this.options == null) {
-            this.options = {};
-        }
-        
-        if (newOptions) {
-            // make sure this.projection references a projection object
-            if(typeof newOptions.projection == "string") {
-                newOptions.projection = new OpenLayers.Projection(newOptions.projection);
-            }
-            if (newOptions.projection) {
-                // get maxResolution, units and maxExtent from projection defaults if
-                // they are not defined already
-                OpenLayers.Util.applyDefaults(newOptions,
-                    OpenLayers.Projection.defaults[newOptions.projection.getCode()]);
-            }
-            // allow array for extents
-            if (newOptions.maxExtent && !(newOptions.maxExtent instanceof OpenLayers.Bounds)) {
-                newOptions.maxExtent = new OpenLayers.Bounds(newOptions.maxExtent);
-            }
-            if (newOptions.minExtent && !(newOptions.minExtent instanceof OpenLayers.Bounds)) {
-                newOptions.minExtent = new OpenLayers.Bounds(newOptions.minExtent);
-            }
-        }
-
-        // update our copy for clone
-        OpenLayers.Util.extend(this.options, newOptions);
-
-        // add new options to this
-        OpenLayers.Util.extend(this, newOptions);
-        
-        // get the units from the projection, if we have a projection
-        // and it it has units
-        if(this.projection && this.projection.getUnits()) {
-            this.units = this.projection.getUnits();
-        }
-
-        // re-initialize resolutions if necessary, i.e. if any of the
-        // properties of the "properties" array defined below is set
-        // in the new options
-        if(this.map) {
-            // store current resolution so we can try to restore it later
-            var resolution = this.map.getResolution();
-            var properties = this.RESOLUTION_PROPERTIES.concat(
-                ["projection", "units", "minExtent", "maxExtent"]
-            );
-            for(var o in newOptions) {
-                if(newOptions.hasOwnProperty(o) &&
-                   OpenLayers.Util.indexOf(properties, o) >= 0) {
-
-                    this.initResolutions();
-                    if (reinitialize && this.map.baseLayer === this) {
-                        // update map position, and restore previous resolution
-                        this.map.setCenter(this.map.getCenter(),
-                            this.map.getZoomForResolution(resolution),
-                            false, true
-                        );
-                        // trigger a changebaselayer event to make sure that
-                        // all controls (especially
-                        // OpenLayers.Control.PanZoomBar) get notified of the
-                        // new options
-                        this.map.events.triggerEvent("changebaselayer", {
-                            layer: this
-                        });
-                    }
-                    break;
-                }
-            }
-        }
-    },
-
-    /**
-     * APIMethod: onMapResize
-     * This function can be implemented by subclasses
-     */
-    onMapResize: function() {
-        //this function can be implemented by subclasses  
-    },
-
-    /**
-     * APIMethod: redraw
-     * Redraws the layer.  Returns true if the layer was redrawn, false if not.
-     *
-     * Returns:
-     * {Boolean} The layer was redrawn.
-     */
-    redraw: function() {
-        var redrawn = false;
-        if (this.map) {
-
-            // min/max Range may have changed
-            this.inRange = this.calculateInRange();
-
-            // map's center might not yet be set
-            var extent = this.getExtent();
-
-            if (extent && this.inRange && this.visibility) {
-                var zoomChanged = true;
-                this.moveTo(extent, zoomChanged, false);
-                this.events.triggerEvent("moveend",
-                    {"zoomChanged": zoomChanged});
-                redrawn = true;
-            }
-        }
-        return redrawn;
-    },
-
-    /**
-     * Method: moveTo
-     * 
-     * Parameters:
-     * bounds - {<OpenLayers.Bounds>}
-     * zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
-     *     do some init work in that case.
-     * dragging - {Boolean}
-     */
-    moveTo:function(bounds, zoomChanged, dragging) {
-        var display = this.visibility;
-        if (!this.isBaseLayer) {
-            display = display && this.inRange;
-        }
-        this.display(display);
-    },
-
-    /**
-     * Method: moveByPx
-     * Move the layer based on pixel vector. To be implemented by subclasses.
-     *
-     * Parameters:
-     * dx - {Number} The x coord of the displacement vector.
-     * dy - {Number} The y coord of the displacement vector.
-     */
-    moveByPx: function(dx, dy) {
-    },
-
-    /**
-     * Method: setMap
-     * Set the map property for the layer. This is done through an accessor
-     *     so that subclasses can override this and take special action once 
-     *     they have their map variable set. 
-     * 
-     *     Here we take care to bring over any of the necessary default 
-     *     properties from the map. 
-     * 
-     * Parameters:
-     * map - {<OpenLayers.Map>}
-     */
-    setMap: function(map) {
-        if (this.map == null) {
-        
-            this.map = map;
-            
-            // grab some essential layer data from the map if it hasn't already
-            //  been set
-            this.maxExtent = this.maxExtent || this.map.maxExtent;
-            this.minExtent = this.minExtent || this.map.minExtent;
-
-            this.projection = this.projection || this.map.projection;
-            if (typeof this.projection == "string") {
-                this.projection = new OpenLayers.Projection(this.projection);
-            }
-
-            // Check the projection to see if we can get units -- if not, refer
-            // to properties.
-            this.units = this.projection.getUnits() ||
-                         this.units || this.map.units;
-            
-            this.initResolutions();
-            
-            if (!this.isBaseLayer) {
-                this.inRange = this.calculateInRange();
-                var show = ((this.visibility) && (this.inRange));
-                this.div.style.display = show ? "" : "none";
-            }
-            
-            // deal with gutters
-            this.setTileSize();
-        }
-    },
-    
-    /**
-     * Method: afterAdd
-     * Called at the end of the map.addLayer sequence.  At this point, the map
-     *     will have a base layer.  To be overridden by subclasses.
-     */
-    afterAdd: function() {
-    },
-    
-    /**
-     * APIMethod: removeMap
-     * Just as setMap() allows each layer the possibility to take a 
-     *     personalized action on being added to the map, removeMap() allows
-     *     each layer to take a personalized action on being removed from it. 
-     *     For now, this will be mostly unused, except for the EventPane layer,
-     *     which needs this hook so that it can remove the special invisible
-     *     pane. 
-     * 
-     * Parameters:
-     * map - {<OpenLayers.Map>}
-     */
-    removeMap: function(map) {
-        //to be overridden by subclasses
-    },
-    
-    /**
-     * APIMethod: getImageSize
-     *
-     * Parameters:
-     * bounds - {<OpenLayers.Bounds>} optional tile bounds, can be used
-     *     by subclasses that have to deal with different tile sizes at the
-     *     layer extent edges (e.g. Zoomify)
-     * 
-     * Returns:
-     * {<OpenLayers.Size>} The size that the image should be, taking into 
-     *     account gutters.
-     */ 
-    getImageSize: function(bounds) { 
-        return (this.imageSize || this.tileSize); 
-    },    
-  
-    /**
-     * APIMethod: setTileSize
-     * Set the tile size based on the map size.  This also sets layer.imageSize
-     *     or use by Tile.Image.
-     * 
-     * Parameters:
-     * size - {<OpenLayers.Size>}
-     */
-    setTileSize: function(size) {
-        var tileSize = (size) ? size :
-                                ((this.tileSize) ? this.tileSize :
-                                                   this.map.getTileSize());
-        this.tileSize = tileSize;
-        if(this.gutter) {
-          // layers with gutters need non-null tile sizes
-          //if(tileSize == null) {
-          //    OpenLayers.console.error("Error in layer.setMap() for " +
-          //                              this.name + ": layers with " +
-          //                              "gutters need non-null tile sizes");
-          //}
-            this.imageSize = new OpenLayers.Size(tileSize.w + (2*this.gutter), 
-                                                 tileSize.h + (2*this.gutter)); 
-        }
-    },
-
-    /**
-     * APIMethod: getVisibility
-     * 
-     * Returns:
-     * {Boolean} The layer should be displayed (if in range).
-     */
-    getVisibility: function() {
-        return this.visibility;
-    },
-
-    /** 
-     * APIMethod: setVisibility
-     * Set the visibility flag for the layer and hide/show & redraw 
-     *     accordingly. Fire event unless otherwise specified
-     * 
-     * Note that visibility is no longer simply whether or not the layer's
-     *     style.display is set to "block". Now we store a 'visibility' state 
-     *     property on the layer class, this allows us to remember whether or 
-     *     not we *desire* for a layer to be visible. In the case where the 
-     *     map's resolution is out of the layer's range, this desire may be 
-     *     subverted.
-     * 
-     * Parameters:
-     * visibility - {Boolean} Whether or not to display the layer (if in range)
-     */
-    setVisibility: function(visibility) {
-        if (visibility != this.visibility) {
-            this.visibility = visibility;
-            this.display(visibility);
-            this.redraw();
-            if (this.map != null) {
-                this.map.events.triggerEvent("changelayer", {
-                    layer: this,
-                    property: "visibility"
-                });
-            }
-            this.events.triggerEvent("visibilitychanged");
-        }
-    },
-
-    /** 
-     * APIMethod: display
-     * Hide or show the Layer. This is designed to be used internally, and 
-     *     is not generally the way to enable or disable the layer. For that,
-     *     use the setVisibility function instead..
-     * 
-     * Parameters:
-     * display - {Boolean}
-     */
-    display: function(display) {
-        if (display != (this.div.style.display != "none")) {
-            this.div.style.display = (display && this.calculateInRange()) ? "block" : "none";
-        }
-    },
-
-    /**
-     * APIMethod: calculateInRange
-     * 
-     * Returns:
-     * {Boolean} The layer is displayable at the current map's current
-     *     resolution. Note that if 'alwaysInRange' is true for the layer, 
-     *     this function will always return true.
-     */
-    calculateInRange: function() {
-        var inRange = false;
-
-        if (this.alwaysInRange) {
-            inRange = true;
-        } else {
-            if (this.map) {
-                var resolution = this.map.getResolution();
-                inRange = ( (resolution >= this.minResolution) &&
-                            (resolution <= this.maxResolution) );
-            }
-        }
-        return inRange;
-    },
-
-    /** 
-     * APIMethod: setIsBaseLayer
-     * 
-     * Parameters:
-     * isBaseLayer - {Boolean}
-     */
-    setIsBaseLayer: function(isBaseLayer) {
-        if (isBaseLayer != this.isBaseLayer) {
-            this.isBaseLayer = isBaseLayer;
-            if (this.map != null) {
-                this.map.events.triggerEvent("changebaselayer", {
-                    layer: this
-                });
-            }
-        }
-    },
-
-  /********************************************************/
-  /*                                                      */
-  /*                 Baselayer Functions                  */
-  /*                                                      */
-  /********************************************************/
-  
-    /** 
-     * Method: initResolutions
-     * This method's responsibility is to set up the 'resolutions' array 
-     *     for the layer -- this array is what the layer will use to interface
-     *     between the zoom levels of the map and the resolution display 
-     *     of the layer.
-     * 
-     * The user has several options that determine how the array is set up.
-     *  
-     * For a detailed explanation, see the following wiki from the 
-     *     openlayers.org homepage:
-     *     http://trac.openlayers.org/wiki/SettingZoomLevels
-     */
-    initResolutions: function() {
-
-        // ok we want resolutions, here's our strategy:
-        //
-        // 1. if resolutions are defined in the layer config, use them
-        // 2. else, if scales are defined in the layer config then derive
-        //    resolutions from these scales
-        // 3. else, attempt to calculate resolutions from maxResolution,
-        //    minResolution, numZoomLevels, maxZoomLevel set in the
-        //    layer config
-        // 4. if we still don't have resolutions, and if resolutions
-        //    are defined in the same, use them
-        // 5. else, if scales are defined in the map then derive
-        //    resolutions from these scales
-        // 6. else, attempt to calculate resolutions from maxResolution,
-        //    minResolution, numZoomLevels, maxZoomLevel set in the
-        //    map
-        // 7. hope for the best!
-
-        var i, len, p;
-        var props = {}, alwaysInRange = true;
-
-        // get resolution data from layer config
-        // (we also set alwaysInRange in the layer as appropriate)
-        for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
-            p = this.RESOLUTION_PROPERTIES[i];
-            props[p] = this.options[p];
-            if(alwaysInRange && this.options[p]) {
-                alwaysInRange = false;
-            }
-        }
-        if(this.options.alwaysInRange == null) {
-            this.alwaysInRange = alwaysInRange;
-        }
-
-        // if we don't have resolutions then attempt to derive them from scales
-        if(props.resolutions == null) {
-            props.resolutions = this.resolutionsFromScales(props.scales);
-        }
-
-        // if we still don't have resolutions then attempt to calculate them
-        if(props.resolutions == null) {
-            props.resolutions = this.calculateResolutions(props);
-        }
-
-        // if we couldn't calculate resolutions then we look at we have
-        // in the map
-        if(props.resolutions == null) {
-            for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
-                p = this.RESOLUTION_PROPERTIES[i];
-                props[p] = this.options[p] != null ?
-                    this.options[p] : this.map[p];
-            }
-            if(props.resolutions == null) {
-                props.resolutions = this.resolutionsFromScales(props.scales);
-            }
-            if(props.resolutions == null) {
-                props.resolutions = this.calculateResolutions(props);
-            }
-        }
-
-        // ok, we new need to set properties in the instance
-
-        // get maxResolution from the config if it's defined there
-        var maxResolution;
-        if(this.options.maxResolution &&
-           this.options.maxResolution !== "auto") {
-            maxResolution = this.options.maxResolution;
-        }
-        if(this.options.minScale) {
-            maxResolution = OpenLayers.Util.getResolutionFromScale(
-                this.options.minScale, this.units);
-        }
-
-        // get minResolution from the config if it's defined there
-        var minResolution;
-        if(this.options.minResolution &&
-           this.options.minResolution !== "auto") {
-            minResolution = this.options.minResolution;
-        }
-        if(this.options.maxScale) {
-            minResolution = OpenLayers.Util.getResolutionFromScale(
-                this.options.maxScale, this.units);
-        }
-
-        if(props.resolutions) {
-
-            //sort resolutions array descendingly
-            props.resolutions.sort(function(a, b) {
-                return (b - a);
-            });
-
-            // if we still don't have a maxResolution get it from the
-            // resolutions array
-            if(!maxResolution) {
-                maxResolution = props.resolutions[0];
-            }
-
-            // if we still don't have a minResolution get it from the
-            // resolutions array
-            if(!minResolution) {
-                var lastIdx = props.resolutions.length - 1;
-                minResolution = props.resolutions[lastIdx];
-            }
-        }
-
-        this.resolutions = props.resolutions;
-        if(this.resolutions) {
-            len = this.resolutions.length;
-            this.scales = new Array(len);
-            for(i=0; i<len; i++) {
-                this.scales[i] = OpenLayers.Util.getScaleFromResolution(
-                    this.resolutions[i], this.units);
-            }
-            this.numZoomLevels = len;
-        }
-        this.minResolution = minResolution;
-        if(minResolution) {
-            this.maxScale = OpenLayers.Util.getScaleFromResolution(
-                minResolution, this.units);
-        }
-        this.maxResolution = maxResolution;
-        if(maxResolution) {
-            this.minScale = OpenLayers.Util.getScaleFromResolution(
-                maxResolution, this.units);
-        }
-    },
-
-    /**
-     * Method: resolutionsFromScales
-     * Derive resolutions from scales.
-     *
-     * Parameters:
-     * scales - {Array(Number)} Scales
-     *
-     * Returns
-     * {Array(Number)} Resolutions
-     */
-    resolutionsFromScales: function(scales) {
-        if(scales == null) {
-            return;
-        }
-        var resolutions, i, len;
-        len = scales.length;
-        resolutions = new Array(len);
-        for(i=0; i<len; i++) {
-            resolutions[i] = OpenLayers.Util.getResolutionFromScale(
-                scales[i], this.units);
-        }
-        return resolutions;
-    },
-
-    /**
-     * Method: calculateResolutions
-     * Calculate resolutions based on the provided properties.
-     *
-     * Parameters:
-     * props - {Object} Properties
-     *
-     * Returns:
-     * {Array({Number})} Array of resolutions.
-     */
-    calculateResolutions: function(props) {
-
-        var viewSize, wRes, hRes;
-
-        // determine maxResolution
-        var maxResolution = props.maxResolution;
-        if(props.minScale != null) {
-            maxResolution =
-                OpenLayers.Util.getResolutionFromScale(props.minScale,
-                                                       this.units);
-        } else if(maxResolution == "auto" && this.maxExtent != null) {
-            viewSize = this.map.getSize();
-            wRes = this.maxExtent.getWidth() / viewSize.w;
-            hRes = this.maxExtent.getHeight() / viewSize.h;
-            maxResolution = Math.max(wRes, hRes);
-        }
-
-        // determine minResolution
-        var minResolution = props.minResolution;
-        if(props.maxScale != null) {
-            minResolution =
-                OpenLayers.Util.getResolutionFromScale(props.maxScale,
-                                                       this.units);
-        } else if(props.minResolution == "auto" && this.minExtent != null) {
-            viewSize = this.map.getSize();
-            wRes = this.minExtent.getWidth() / viewSize.w;
-            hRes = this.minExtent.getHeight()/ viewSize.h;
-            minResolution = Math.max(wRes, hRes);
-        }
-
-        if(typeof maxResolution !== "number" &&
-           typeof minResolution !== "number" &&
-           this.maxExtent != null) {
-            // maxResolution for default grid sets assumes that at zoom
-            // level zero, the whole world fits on one tile.
-            var tileSize = this.map.getTileSize();
-            maxResolution = Math.max(
-                this.maxExtent.getWidth() / tileSize.w,
-                this.maxExtent.getHeight() / tileSize.h
-            );
-        }
-
-        // determine numZoomLevels
-        var maxZoomLevel = props.maxZoomLevel;
-        var numZoomLevels = props.numZoomLevels;
-        if(typeof minResolution === "number" &&
-           typeof maxResolution === "number" && numZoomLevels === undefined) {
-            var ratio = maxResolution / minResolution;
-            numZoomLevels = Math.floor(Math.log(ratio) / Math.log(2)) + 1;
-        } else if(numZoomLevels === undefined && maxZoomLevel != null) {
-            numZoomLevels = maxZoomLevel + 1;
-        }
-
-        // are we able to calculate resolutions?
-        if(typeof numZoomLevels !== "number" || numZoomLevels <= 0 ||
-           (typeof maxResolution !== "number" &&
-                typeof minResolution !== "number")) {
-            return;
-        }
-
-        // now we have numZoomLevels and at least one of maxResolution
-        // or minResolution, we can populate the resolutions array
-
-        var resolutions = new Array(numZoomLevels);
-        var base = 2;
-        if(typeof minResolution == "number" &&
-           typeof maxResolution == "number") {
-            // if maxResolution and minResolution are set, we calculate
-            // the base for exponential scaling that starts at
-            // maxResolution and ends at minResolution in numZoomLevels
-            // steps.
-            base = Math.pow(
-                    (maxResolution / minResolution),
-                (1 / (numZoomLevels - 1))
-            );
-        }
-
-        var i;
-        if(typeof maxResolution === "number") {
-            for(i=0; i<numZoomLevels; i++) {
-                resolutions[i] = maxResolution / Math.pow(base, i);
-            }
-        } else {
-            for(i=0; i<numZoomLevels; i++) {
-                resolutions[numZoomLevels - 1 - i] =
-                    minResolution * Math.pow(base, i);
-            }
-        }
-
-        return resolutions;
-    },
-
-    /**
-     * APIMethod: getResolution
-     * 
-     * Returns:
-     * {Float} The currently selected resolution of the map, taken from the
-     *     resolutions array, indexed by current zoom level.
-     */
-    getResolution: function() {
-        var zoom = this.map.getZoom();
-        return this.getResolutionForZoom(zoom);
-    },
-
-    /** 
-     * APIMethod: getExtent
-     * 
-     * Returns:
-     * {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat 
-     *     bounds of the current viewPort.
-     */
-    getExtent: function() {
-        // just use stock map calculateBounds function -- passing no arguments
-        //  means it will user map's current center & resolution
-        //
-        return this.map.calculateBounds();
-    },
-
-    /**
-     * APIMethod: getZoomForExtent
-     * 
-     * Parameters:
-     * extent - {<OpenLayers.Bounds>}
-     * closest - {Boolean} Find the zoom level that most closely fits the 
-     *     specified bounds. Note that this may result in a zoom that does 
-     *     not exactly contain the entire extent.
-     *     Default is false.
-     *
-     * Returns:
-     * {Integer} The index of the zoomLevel (entry in the resolutions array) 
-     *     for the passed-in extent. We do this by calculating the ideal 
-     *     resolution for the given extent (based on the map size) and then 
-     *     calling getZoomForResolution(), passing along the 'closest'
-     *     parameter.
-     */
-    getZoomForExtent: function(extent, closest) {
-        var viewSize = this.map.getSize();
-        var idealResolution = Math.max( extent.getWidth()  / viewSize.w,
-                                        extent.getHeight() / viewSize.h );
-
-        return this.getZoomForResolution(idealResolution, closest);
-    },
-    
-    /** 
-     * Method: getDataExtent
-     * Calculates the max extent which includes all of the data for the layer.
-     *     This function is to be implemented by subclasses.
-     * 
-     * Returns:
-     * {<OpenLayers.Bounds>}
-     */
-    getDataExtent: function () {
-        //to be implemented by subclasses
-    },
-
-    /**
-     * APIMethod: getResolutionForZoom
-     * 
-     * Parameters:
-     * zoom - {Float}
-     * 
-     * Returns:
-     * {Float} A suitable resolution for the specified zoom.
-     */
-    getResolutionForZoom: function(zoom) {
-        zoom = Math.max(0, Math.min(zoom, this.resolutions.length - 1));
-        var resolution;
-        if(this.map.fractionalZoom) {
-            var low = Math.floor(zoom);
-            var high = Math.ceil(zoom);
-            resolution = this.resolutions[low] -
-                ((zoom-low) * (this.resolutions[low]-this.resolutions[high]));
-        } else {
-            resolution = this.resolutions[Math.round(zoom)];
-        }
-        return resolution;
-    },
-
-    /**
-     * APIMethod: getZoomForResolution
-     * 
-     * Parameters:
-     * resolution - {Float}
-     * closest - {Boolean} Find the zoom level that corresponds to the absolute 
-     *     closest resolution, which may result in a zoom whose corresponding
-     *     resolution is actually smaller than we would have desired (if this
-     *     is being called from a getZoomForExtent() call, then this means that
-     *     the returned zoom index might not actually contain the entire 
-     *     extent specified... but it'll be close).
-     *     Default is false.
-     * 
-     * Returns:
-     * {Integer} The index of the zoomLevel (entry in the resolutions array) 
-     *     that corresponds to the best fit resolution given the passed in 
-     *     value and the 'closest' specification.
-     */
-    getZoomForResolution: function(resolution, closest) {
-        var zoom, i, len;
-        if(this.map.fractionalZoom) {
-            var lowZoom = 0;
-            var highZoom = this.resolutions.length - 1;
-            var highRes = this.resolutions[lowZoom];
-            var lowRes = this.resolutions[highZoom];
-            var res;
-            for(i=0, len=this.resolutions.length; i<len; ++i) {
-                res = this.resolutions[i];
-                if(res >= resolution) {
-                    highRes = res;
-                    lowZoom = i;
-                }
-                if(res <= resolution) {
-                    lowRes = res;
-                    highZoom = i;
-                    break;
-                }
-            }
-            var dRes = highRes - lowRes;
-            if(dRes > 0) {
-                zoom = lowZoom + ((highRes - resolution) / dRes);
-            } else {
-                zoom = lowZoom;
-            }
-        } else {
-            var diff;
-            var minDiff = Number.POSITIVE_INFINITY;
-            for(i=0, len=this.resolutions.length; i<len; i++) {            
-                if (closest) {
-                    diff = Math.abs(this.resolutions[i] - resolution);
-                    if (diff > minDiff) {
-                        break;
-                    }
-                    minDiff = diff;
-                } else {
-                    if (this.resolutions[i] < resolution) {
-                        break;
-                    }
-                }
-            }
-            zoom = Math.max(0, i-1);
-        }
-        return zoom;
-    },
-    
-    /**
-     * APIMethod: getLonLatFromViewPortPx
-     * 
-     * Parameters:
-     * viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
-     *                                          an object with a 'x'
-     *                                          and 'y' properties.
-     *
-     * Returns:
-     * {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in 
-     *     view port <OpenLayers.Pixel>, translated into lon/lat by the layer.
-     */
-    getLonLatFromViewPortPx: function (viewPortPx) {
-        var lonlat = null;
-        var map = this.map;
-        if (viewPortPx != null && map.minPx) {
-            var res = map.getResolution();
-            var maxExtent = map.getMaxExtent({restricted: true});
-            var lon = (viewPortPx.x - map.minPx.x) * res + maxExtent.left;
-            var lat = (map.minPx.y - viewPortPx.y) * res + maxExtent.top;
-            lonlat = new OpenLayers.LonLat(lon, lat);
-
-            if (this.wrapDateLine) {
-                lonlat = lonlat.wrapDateLine(this.maxExtent);
-            }
-        }
-        return lonlat;
-    },
-
-    /**
-     * APIMethod: getViewPortPxFromLonLat
-     * Returns a pixel location given a map location.  This method will return
-     *     fractional pixel values.
-     * 
-     * Parameters:
-     * lonlat - {<OpenLayers.LonLat>|Object} An OpenLayers.LonLat or
-     *                                       an object with a 'lon'
-     *                                       and 'lat' properties.
-     *
-     * Returns: 
-     * {<OpenLayers.Pixel>} An <OpenLayers.Pixel> which is the passed-in 
-     *     lonlat translated into view port pixels.
-     */
-    getViewPortPxFromLonLat: function (lonlat, resolution) {
-        var px = null; 
-        if (lonlat != null) {
-            resolution = resolution || this.map.getResolution();
-            var extent = this.map.calculateBounds(null, resolution);
-            px = new OpenLayers.Pixel(
-                (1/resolution * (lonlat.lon - extent.left)),
-                (1/resolution * (extent.top - lonlat.lat))
-            );    
-        }
-        return px;
-    },
-    
-    /**
-     * APIMethod: setOpacity
-     * Sets the opacity for the entire layer (all images)
-     * 
-     * Parameters:
-     * opacity - {Float}
-     */
-    setOpacity: function(opacity) {
-        if (opacity != this.opacity) {
-            this.opacity = opacity;
-            var childNodes = this.div.childNodes;
-            for(var i = 0, len = childNodes.length; i < len; ++i) {
-                var element = childNodes[i].firstChild || childNodes[i];
-                var lastChild = childNodes[i].lastChild;
-                //TODO de-uglify this
-                if (lastChild && lastChild.nodeName.toLowerCase() === "iframe") {
-                    element = lastChild.parentNode;
-                }
-                OpenLayers.Util.modifyDOMElement(element, null, null, null, 
-                                                 null, null, null, opacity);
-            }
-            if (this.map != null) {
-                this.map.events.triggerEvent("changelayer", {
-                    layer: this,
-                    property: "opacity"
-                });
-            }
-        }
-    },
-
-    /**
-     * Method: getZIndex
-     * 
-     * Returns: 
-     * {Integer} the z-index of this layer
-     */    
-    getZIndex: function () {
-        return this.div.style.zIndex;
-    },
-
-    /**
-     * Method: setZIndex
-     * 
-     * Parameters: 
-     * zIndex - {Integer}
-     */    
-    setZIndex: function (zIndex) {
-        this.div.style.zIndex = zIndex;
-    },
-
-    /**
-     * Method: adjustBounds
-     * This function will take a bounds, and if wrapDateLine option is set
-     *     on the layer, it will return a bounds which is wrapped around the 
-     *     world. We do not wrap for bounds which *cross* the 
-     *     maxExtent.left/right, only bounds which are entirely to the left 
-     *     or entirely to the right.
-     * 
-     * Parameters:
-     * bounds - {<OpenLayers.Bounds>}
-     */
-    adjustBounds: function (bounds) {
-
-        if (this.gutter) {
-            // Adjust the extent of a bounds in map units by the 
-            // layer's gutter in pixels.
-            var mapGutter = this.gutter * this.map.getResolution();
-            bounds = new OpenLayers.Bounds(bounds.left - mapGutter,
-                                           bounds.bottom - mapGutter,
-                                           bounds.right + mapGutter,
-                                           bounds.top + mapGutter);
-        }
-
-        if (this.wrapDateLine) {
-            // wrap around the date line, within the limits of rounding error
-            var wrappingOptions = { 
-                'rightTolerance':this.getResolution(),
-                'leftTolerance':this.getResolution()
-            };    
-            bounds = bounds.wrapDateLine(this.maxExtent, wrappingOptions);
-                              
-        }
-        return bounds;
-    },
-
-    CLASS_NAME: "OpenLayers.Layer"
-});