OpenLayers.Layer = Class.create();

OpenLayers.Layer.prototype = {

    // str
    name: null,

    // DOMElement
    div: null,

    /** This variable is set in map.addLayer, not within the layer itself
    * @type OpenLayers.Map */
    map: null,

    // str -- projection for use in WFS, WMS, etc.
    projection: null,
    
    /**
    * @param {str} name
    */
    initialize: function(name) {
        if (arguments.length > 0) {
            this.name = name;
            if (this.div == null) {
                this.div = OpenLayers.Util.createDiv();
                this.div.style.width = "100%";
                this.div.style.height = "100%";
            }
        }
    },
    
    /**
     * Destroy is a destructor: this is to alleviate cyclic references which
     * the Javascript garbage cleaner can not take care of on its own.
    */
    destroy: function() {
        this.map = null;
    },

    /**
    * @params {OpenLayers.Bounds} bound
    * @params {bool} zoomChanged tells when zoom has changed, as layers have to do some init work in that case.
    */
    moveTo: function (bound,zoomChanged) {
        // not implemented here
        return;
    },
    
    /**
    * @return {bool}
    */
    getVisibility: function() {
        return (this.div.style.display != "none");
    },

    /** 
    * @param {bool} visible
    */
    setVisibility: function(visible) {
        this.div.style.display = (visible) ? "block" : "none";
        if ((visible) && (this.map != null)) {
            this.moveTo(this.map.getExtent());
        }
    },
    
    /** @final @type String */
    CLASS_NAME: "OpenLayers.Layer"
};