/**
 * Google V3 API horde map driver.
 *
 * Copyright 2011-2013 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file COPYING for license information (GPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/gpl.html.
 *
 * @author Michael J. Rubinsky <mrubinsk@horde.org>
 */
HordeMap.Google = Class.create(
{
    initialize: function(opts) {},

    getLayers: function(layer)
    {
        return {
            'streets': new OpenLayers.Layer.Google('Google Streets', {}),

            'sat':     new OpenLayers.Layer.Google(
                'Google Satellite',
                {
                    'type': google.maps.MapTypeId.SATELLITE,
                    'minZoomLevel': 0
                }
            ),

            'hybrid':  new OpenLayers.Layer.Google(
                'Google Hybrid',
                {
                    'type': google.maps.MapTypeId.HYBRID,
                    'minZoomLevel': 0
                }
            ),

            'terrain': new OpenLayers.Layer.Google(
                'Google Physical',
                {
                    'type': google.maps.MapTypeId.TERRAIN,
                    'numZoomLevels': 16,
                    'minZoomLevel': 0
                }
            )
        }
    }
});

/**
 * HordeMap geocoder
 */
HordeMap.Geocoder.Google = Class.create(
{
    initialize: function(map)
    {
        this.gc = new google.maps.Geocoder();
    },

    /**
     * Perform geocode request.
     */
    geocode: function(address, completeCallback, errorCallback)
    {
        /* Need to wrap the callback to make sure we return the same
         * data structures for each provider
         */
        this._userCallback = completeCallback;
        this._errorCallback = errorCallback || function() {};
        this.gc.geocode({ 'address': address }, this._callback.bind(this));
    },

    _callback: function(r, s)
    {
        if (s != google.maps.GeocoderStatus.OK) {
            this._errorCallback(s);
            return;
        }
        var results = [];
        r.each(function(entry) {
             // TODO: convert location_type to some normalized value for Horde
             var ll = {
                lon: entry.geometry.location.lng(),
                lat: entry.geometry.location.lat(),
                precision: entry.geometry.location_type
            };
            results.push(ll);
         });
        this._userCallback(results);
    },

    /**
     * precision:
     *  0 - none
     *  1 - location
     *  2 - street address
     */
    _reverseCallback: function(r, s)
    {
        if (s != google.maps.GeocoderStatus.OK) {
            this._errorCallback(s);
            return;
        }
        var results = [];

        r.each(function(entry) {
            var ll = {
                lon: entry.geometry.location.lng(),
                lat: entry.geometry.location.lat(),
                address: entry.formatted_address,
                precision: (entry.types[0] == 'street_address') ? 2 : 1
            };
            results.push(ll);
        });
        this._userCallback(results);
    },

    /**
     * Reverse geocode request
     *
     * @TODO: Need to wrap wrap the completeCallback with our own handler
     *        and intercept any errors then forward to the errorCallback.
     */
    reverseGeocode: function(latlon, completeCallback, errorCallback)
    {
        this._userCallback = completeCallback;
        this._errorCallback = errorCallback || function () {};
        this.gc.geocode(
            { 'latLng': new google.maps.LatLng(latlon.lat, latlon.lon) },
            this._reverseCallback.bind(this)
        );
    }
});
/* Copyright (c) 2006-2011 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the Clear BSD license.
 * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/SphericalMercator.js
 * @requires OpenLayers/Layer/EventPane.js
 * @requires OpenLayers/Layer/FixedZoomLevels.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Layer.Google
 *
 * Inherits from:
 *  - <OpenLayers.Layer.SphericalMercator>
 *  - <OpenLayers.Layer.EventPane>
 *  - <OpenLayers.Layer.FixedZoomLevels>
 */
OpenLayers.Layer.Google = OpenLayers.Class(
    OpenLayers.Layer.EventPane,
    OpenLayers.Layer.FixedZoomLevels, {

    /**
     * Constant: MIN_ZOOM_LEVEL
     * {Integer} 0
     */
    MIN_ZOOM_LEVEL: 0,

    /**
     * Constant: MAX_ZOOM_LEVEL
     * {Integer} 21
     */
    MAX_ZOOM_LEVEL: 21,

    /**
     * Constant: RESOLUTIONS
     * {Array(Float)} Hardcode these resolutions so that they are more closely
     *                tied with the standard wms projection
     */
    RESOLUTIONS: [
        1.40625,
        0.703125,
        0.3515625,
        0.17578125,
        0.087890625,
        0.0439453125,
        0.02197265625,
        0.010986328125,
        0.0054931640625,
        0.00274658203125,
        0.001373291015625,
        0.0006866455078125,
        0.00034332275390625,
        0.000171661376953125,
        0.0000858306884765625,
        0.00004291534423828125,
        0.00002145767211914062,
        0.00001072883605957031,
        0.00000536441802978515,
        0.00000268220901489257,
        0.0000013411045074462891,
        0.00000067055225372314453
    ],

    /**
     * APIProperty: type
     * {GMapType}
     */
    type: null,

    /**
     * APIProperty: wrapDateLine
     * {Boolean} Allow user to pan forever east/west.  Default is true.
     *     Setting this to false only restricts panning if
     *     <sphericalMercator> is true.
     */
    wrapDateLine: true,

    /**
     * APIProperty: sphericalMercator
     * {Boolean} Should the map act as a mercator-projected map? This will
     *     cause all interactions with the map to be in the actual map
     *     projection, which allows support for vector drawing, overlaying
     *     other maps, etc.
     */
    sphericalMercator: false,

    /**
     * Property: version
     * {Number} The version of the Google Maps API
     */
    version: null,

    /**
     * Constructor: OpenLayers.Layer.Google
     *
     * Parameters:
     * name - {String} A name for the layer.
     * options - {Object} An optional object whose properties will be set
     *     on the layer.
     */
    initialize: function(name, options) {
        options = options || {};
        if(!options.version) {
            options.version = typeof GMap2 === "function" ? "2" : "3";
        }
        var mixin = OpenLayers.Layer.Google["v" +
            options.version.replace(/\./g, "_")];
        if (mixin) {
            OpenLayers.Util.applyDefaults(options, mixin);
        } else {
            throw "Unsupported Google Maps API version: " + options.version;
        }

        OpenLayers.Util.applyDefaults(options, mixin.DEFAULTS);
        if (options.maxExtent) {
            options.maxExtent = options.maxExtent.clone();
        }

        OpenLayers.Layer.EventPane.prototype.initialize.apply(this,
            [name, options]);
        OpenLayers.Layer.FixedZoomLevels.prototype.initialize.apply(this,
            [name, options]);

        if (this.sphericalMercator) {
            OpenLayers.Util.extend(this, OpenLayers.Layer.SphericalMercator);
            this.initMercatorParameters();
        }
    },

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.Google>} An exact clone of this layer
     */
    clone: function() {
        /**
         * This method isn't intended to be called by a subclass and it
         * doesn't call the same method on the superclass.  We don't call
         * the super's clone because we don't want properties that are set
         * on this layer after initialize (i.e. this.mapObject etc.).
         */
        return new OpenLayers.Layer.Google(
            this.name, this.getOptions()
        );
    },

    /**
     * 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:
     * visible - {Boolean} Display the layer (if in range)
     */
    setVisibility: function(visible) {
        // sharing a map container, opacity has to be set per layer
        var opacity = this.opacity == null ? 1 : this.opacity;
        OpenLayers.Layer.EventPane.prototype.setVisibility.apply(this, arguments);
        this.setOpacity(opacity);
    },

    /**
     * APIMethod: display
     * Hide or show the Layer
     *
     * Parameters:
     * display - {Boolean}
     */
    display: function(visible) {
        if (!this._dragging) {
            this.setGMapVisibility(visible);
        }
        OpenLayers.Layer.EventPane.prototype.display.apply(this, arguments);
    },

    /**
     * Method: moveTo
     *
     * Parameters:
     * bound - {<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) {
        this._dragging = dragging;
        OpenLayers.Layer.EventPane.prototype.moveTo.apply(this, arguments);
        delete this._dragging;
    },

    /**
     * APIMethod: setOpacity
     * Sets the opacity for the entire layer (all images)
     *
     * Parameter:
     * opacity - {Float}
     */
    setOpacity: function(opacity) {
        if (opacity !== this.opacity) {
            if (this.map != null) {
                this.map.events.triggerEvent("changelayer", {
                    layer: this,
                    property: "opacity"
                });
            }
            this.opacity = opacity;
        }
        // Though this layer's opacity may not change, we're sharing a container
        // and need to update the opacity for the entire container.
        if (this.getVisibility()) {
            var container = this.getMapContainer();
            OpenLayers.Util.modifyDOMElement(
                container, null, null, null, null, null, null, opacity
            );
        }
    },

    /**
     * APIMethod: destroy
     * Clean up this layer.
     */
    destroy: function() {
        /**
         * We have to override this method because the event pane destroy
         * deletes the mapObject reference before removing this layer from
         * the map.
         */
        if (this.map) {
            this.setGMapVisibility(false);
            var cache = OpenLayers.Layer.Google.cache[this.map.id];
            if (cache && cache.count <= 1) {
                this.removeGMapElements();
            }
        }
        OpenLayers.Layer.EventPane.prototype.destroy.apply(this, arguments);
    },

    /**
     * Method: removeGMapElements
     * Remove all elements added to the dom.  This should only be called if
     * this is the last of the Google layers for the given map.
     */
    removeGMapElements: function() {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // remove shared elements from dom
            var container = this.mapObject && this.getMapContainer();
            if (container && container.parentNode) {
                container.parentNode.removeChild(container);
            }
            var termsOfUse = cache.termsOfUse;
            if (termsOfUse && termsOfUse.parentNode) {
                termsOfUse.parentNode.removeChild(termsOfUse);
            }
            var poweredBy = cache.poweredBy;
            if (poweredBy && poweredBy.parentNode) {
                poweredBy.parentNode.removeChild(poweredBy);
            }
        }
    },

    /**
     * APIMethod: removeMap
     * On being removed from the map, also remove termsOfUse and poweredBy divs
     *
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        // hide layer before removing
        if (this.visibility && this.mapObject) {
            this.setGMapVisibility(false);
        }
        // check to see if last Google layer in this map
        var cache = OpenLayers.Layer.Google.cache[map.id];
        if (cache) {
            if (cache.count <= 1) {
                this.removeGMapElements();
                delete OpenLayers.Layer.Google.cache[map.id];
            } else {
                // decrement the layer count
                --cache.count;
            }
        }
        // remove references to gmap elements
        delete this.termsOfUse;
        delete this.poweredBy;
        delete this.mapObject;
        delete this.dragObject;
        OpenLayers.Layer.EventPane.prototype.removeMap.apply(this, arguments);
    },

  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getOLBoundsFromMapObjectBounds
     *
     * Parameters:
     * moBounds - {Object}
     *
     * Returns:
     * {<OpenLayers.Bounds>} An <OpenLayers.Bounds>, translated from the
     *                       passed-in MapObject Bounds.
     *                       Returns null if null value is passed in.
     */
    getOLBoundsFromMapObjectBounds: function(moBounds) {
        var olBounds = null;
        if (moBounds != null) {
            var sw = moBounds.getSouthWest();
            var ne = moBounds.getNorthEast();
            if (this.sphericalMercator) {
                sw = this.forwardMercator(sw.lng(), sw.lat());
                ne = this.forwardMercator(ne.lng(), ne.lat());
            } else {
                sw = new OpenLayers.LonLat(sw.lng(), sw.lat());
                ne = new OpenLayers.LonLat(ne.lng(), ne.lat());
            }
            olBounds = new OpenLayers.Bounds(sw.lon,
                                             sw.lat,
                                             ne.lon,
                                             ne.lat );
        }
        return olBounds;
    },

    /**
     * APIMethod: getWarningHTML
     *
     * Returns:
     * {String} String with information on why layer is broken, how to get
     *          it working.
     */
    getWarningHTML:function() {
        return OpenLayers.i18n("googleWarning");
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // Get&Set Center, Zoom

    /**
     * APIMethod: getMapObjectCenter
     *
     * Returns:
     * {Object} The mapObject's current center in Map Object format
     */
    getMapObjectCenter: function() {
        return this.mapObject.getCenter();
    },

    /**
     * APIMethod: getMapObjectZoom
     *
     * Returns:
     * {Integer} The mapObject's current zoom, in Map Object format
     */
    getMapObjectZoom: function() {
        return this.mapObject.getZoom();
    },


    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat

    /**
     * APIMethod: getLongitudeFromMapObjectLonLat
     *
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     *
     * Returns:
     * {Float} Longitude of the given MapObject LonLat
     */
    getLongitudeFromMapObjectLonLat: function(moLonLat) {
        return this.sphericalMercator ?
          this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lon :
          moLonLat.lng();
    },

    /**
     * APIMethod: getLatitudeFromMapObjectLonLat
     *
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     *
     * Returns:
     * {Float} Latitude of the given MapObject LonLat
     */
    getLatitudeFromMapObjectLonLat: function(moLonLat) {
        var lat = this.sphericalMercator ?
          this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lat :
          moLonLat.lat();
        return lat;
    },

  // Pixel

    /**
     * APIMethod: getXFromMapObjectPixel
     *
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     *
     * Returns:
     * {Integer} X value of the MapObject Pixel
     */
    getXFromMapObjectPixel: function(moPixel) {
        return moPixel.x;
    },

    /**
     * APIMethod: getYFromMapObjectPixel
     *
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     *
     * Returns:
     * {Integer} Y value of the MapObject Pixel
     */
    getYFromMapObjectPixel: function(moPixel) {
        return moPixel.y;
    },

    CLASS_NAME: "OpenLayers.Layer.Google"
});

/**
 * Property: OpenLayers.Layer.Google.cache
 * {Object} Cache for elements that should only be created once per map.
 */
OpenLayers.Layer.Google.cache = {};


/**
 * Constant: OpenLayers.Layer.Google.v2
 *
 * Mixin providing functionality specific to the Google Maps API v2.
 */
OpenLayers.Layer.Google.v2 = {

    /**
     * Property: termsOfUse
     * {DOMElement} Div for Google's copyright and terms of use link
     */
    termsOfUse: null,

    /**
     * Property: poweredBy
     * {DOMElement} Div for Google's powered by logo and link
     */
    poweredBy: null,

    /**
     * Property: dragObject
     * {GDraggableObject} Since 2.93, Google has exposed the ability to get
     *     the maps GDraggableObject. We can now use this for smooth panning
     */
    dragObject: null,

    /**
     * Method: loadMapObject
     * Load the GMap and register appropriate event listeners. If we can't
     *     load GMap2, then display a warning message.
     */
    loadMapObject:function() {
        if (!this.type) {
            this.type = G_NORMAL_MAP;
        }
        var mapObject, termsOfUse, poweredBy;
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // there are already Google layers added to this map
            mapObject = cache.mapObject;
            termsOfUse = cache.termsOfUse;
            poweredBy = cache.poweredBy;
            // increment the layer count
            ++cache.count;
        } else {
            // this is the first Google layer for this map

            var container = this.map.viewPortDiv;
            var div = document.createElement("div");
            div.id = this.map.id + "_GMap2Container";
            div.style.position = "absolute";
            div.style.width = "100%";
            div.style.height = "100%";
            container.appendChild(div);

            // create GMap and shuffle elements
            try {
                mapObject = new GMap2(div);

                // move the ToS and branding stuff up to the container div
                termsOfUse = div.lastChild;
                container.appendChild(termsOfUse);
                termsOfUse.style.zIndex = "1100";
                termsOfUse.style.right = "";
                termsOfUse.style.bottom = "";
                termsOfUse.className = "olLayerGoogleCopyright";

                poweredBy = div.lastChild;
                container.appendChild(poweredBy);
                poweredBy.style.zIndex = "1100";
                poweredBy.style.right = "";
                poweredBy.style.bottom = "";
                poweredBy.className = "olLayerGooglePoweredBy gmnoprint";

            } catch (e) {
                throw(e);
            }
            // cache elements for use by any other google layers added to
            // this same map
            OpenLayers.Layer.Google.cache[this.map.id] = {
                mapObject: mapObject,
                termsOfUse: termsOfUse,
                poweredBy: poweredBy,
                count: 1
            };
        }

        this.mapObject = mapObject;
        this.termsOfUse = termsOfUse;
        this.poweredBy = poweredBy;

        // ensure this layer type is one of the mapObject types
        if (OpenLayers.Util.indexOf(this.mapObject.getMapTypes(),
                                    this.type) === -1) {
            this.mapObject.addMapType(this.type);
        }

        //since v 2.93 getDragObject is now available.
        if(typeof mapObject.getDragObject == "function") {
            this.dragObject = mapObject.getDragObject();
        } else {
            this.dragPanMapObject = null;
        }

        if(this.isBaseLayer === false) {
            this.setGMapVisibility(this.div.style.display !== "none");
        }

    },

    /**
     * APIMethod: onMapResize
     */
    onMapResize: function() {
        // workaround for resizing of invisible or not yet fully loaded layers
        // where GMap2.checkResize() does not work. We need to load the GMap
        // for the old div size, then checkResize(), and then call
        // layer.moveTo() to trigger GMap.setCenter() (which will finish
        // the GMap initialization).
        if(this.visibility && this.mapObject.isLoaded()) {
            this.mapObject.checkResize();
        } else {
            if(!this._resized) {
                var layer = this;
                var handle = GEvent.addListener(this.mapObject, "load", function() {
                    GEvent.removeListener(handle);
                    delete layer._resized;
                    layer.mapObject.checkResize();
                    layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
                });
            }
            this._resized = true;
        }
    },

    /**
     * Method: setGMapVisibility
     * Display the GMap container and associated elements.
     *
     * Parameters:
     * visible - {Boolean} Display the GMap elements.
     */
    setGMapVisibility: function(visible) {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            var container = this.mapObject.getContainer();
            if (visible === true) {
                this.mapObject.setMapType(this.type);
                container.style.display = "";
                this.termsOfUse.style.left = "";
                this.termsOfUse.style.display = "";
                this.poweredBy.style.display = "";
                cache.displayed = this.id;
            } else {
                if (cache.displayed === this.id) {
                    delete cache.displayed;
                }
                if (!cache.displayed) {
                    container.style.display = "none";
                    this.termsOfUse.style.display = "none";
                    // move ToU far to the left in addition to setting display
                    // to "none", because at the end of the GMap2 load
                    // sequence, display: none will be unset and ToU would be
                    // visible after loading a map with a google layer that is
                    // initially hidden.
                    this.termsOfUse.style.left = "-9999px";
                    this.poweredBy.style.display = "none";
                }
            }
        }
    },

    /**
     * Method: getMapContainer
     *
     * Returns:
     * {DOMElement} the GMap container's div
     */
    getMapContainer: function() {
        return this.mapObject.getContainer();
    },

  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getMapObjectBoundsFromOLBounds
     *
     * Parameters:
     * olBounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {Object} A MapObject Bounds, translated from olBounds
     *          Returns null if null value is passed in
     */
    getMapObjectBoundsFromOLBounds: function(olBounds) {
        var moBounds = null;
        if (olBounds != null) {
            var sw = this.sphericalMercator ?
              this.inverseMercator(olBounds.bottom, olBounds.left) :
              new OpenLayers.LonLat(olBounds.bottom, olBounds.left);
            var ne = this.sphericalMercator ?
              this.inverseMercator(olBounds.top, olBounds.right) :
              new OpenLayers.LonLat(olBounds.top, olBounds.right);
            moBounds = new GLatLngBounds(new GLatLng(sw.lat, sw.lon),
                                         new GLatLng(ne.lat, ne.lon));
        }
        return moBounds;
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // Get&Set Center, Zoom

    /**
     * APIMethod: setMapObjectCenter
     * Set the mapObject to the specified center and zoom
     *
     * Parameters:
     * center - {Object} MapObject LonLat format
     * zoom - {int} MapObject zoom format
     */
    setMapObjectCenter: function(center, zoom) {
        this.mapObject.setCenter(center, zoom);
    },

    /**
     * APIMethod: dragPanMapObject
     *
     * Parameters:
     * dX - {Integer}
     * dY - {Integer}
     */
    dragPanMapObject: function(dX, dY) {
        this.dragObject.moveBy(new GSize(-dX, dY));
    },


  // LonLat - Pixel Translation

    /**
     * APIMethod: getMapObjectLonLatFromMapObjectPixel
     *
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     *
     * Returns:
     * {Object} MapObject LonLat translated from MapObject Pixel
     */
    getMapObjectLonLatFromMapObjectPixel: function(moPixel) {
        return this.mapObject.fromContainerPixelToLatLng(moPixel);
    },

    /**
     * APIMethod: getMapObjectPixelFromMapObjectLonLat
     *
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     *
     * Returns:
     * {Object} MapObject Pixel transtlated from MapObject LonLat
     */
    getMapObjectPixelFromMapObjectLonLat: function(moLonLat) {
        return this.mapObject.fromLatLngToContainerPixel(moLonLat);
    },


  // Bounds

    /**
     * APIMethod: getMapObjectZoomFromMapObjectBounds
     *
     * Parameters:
     * moBounds - {Object} MapObject Bounds format
     *
     * Returns:
     * {Object} MapObject Zoom for specified MapObject Bounds
     */
    getMapObjectZoomFromMapObjectBounds: function(moBounds) {
        return this.mapObject.getBoundsZoomLevel(moBounds);
    },

    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat

    /**
     * APIMethod: getMapObjectLonLatFromLonLat
     *
     * Parameters:
     * lon - {Float}
     * lat - {Float}
     *
     * Returns:
     * {Object} MapObject LonLat built from lon and lat params
     */
    getMapObjectLonLatFromLonLat: function(lon, lat) {
        var gLatLng;
        if(this.sphericalMercator) {
            var lonlat = this.inverseMercator(lon, lat);
            gLatLng = new GLatLng(lonlat.lat, lonlat.lon);
        } else {
            gLatLng = new GLatLng(lat, lon);
        }
        return gLatLng;
    },

  // Pixel

    /**
     * APIMethod: getMapObjectPixelFromXY
     *
     * Parameters:
     * x - {Integer}
     * y - {Integer}
     *
     * Returns:
     * {Object} MapObject Pixel from x and y parameters
     */
    getMapObjectPixelFromXY: function(x, y) {
        return new GPoint(x, y);
    }

};
/* Copyright (c) 2006-2011 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the Clear BSD license.
 * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Google.js
 */

/**
 * Constant: OpenLayers.Layer.Google.v3
 *
 * Mixin providing functionality specific to the Google Maps API v3. Note that
 * this layer configures the google.maps.map object with the "disableDefaultUI"
 * option set to true. Using UI controls that the Google Maps API provides is
 * not supported by the OpenLayers API.
 */
OpenLayers.Layer.Google.v3 = {

    /**
     * Constant: DEFAULTS
     * {Object} It is not recommended to change the properties set here. Note
     * that Google.v3 layers only work when sphericalMercator is set to true.
     *
     * (code)
     * {
     *     maxExtent: new OpenLayers.Bounds(
     *         -128 * 156543.03390625,
     *         -128 * 156543.03390625,
     *         128 * 156543.03390625,
     *         128 * 156543.03390625
     *     ),
     *     sphericalMercator: true,
     *     maxResolution: 156543.03390625,
     *     units: "m",
     *     projection: "EPSG:900913"
     * }
     * (end)
     */
    DEFAULTS: {
        maxExtent: new OpenLayers.Bounds(
            -128 * 156543.03390625,
            -128 * 156543.03390625,
            128 * 156543.03390625,
            128 * 156543.03390625
        ),
        sphericalMercator: true,
        maxResolution: 156543.03390625,
        units: "m",
        projection: "EPSG:900913"
    },

    /**
     * APIProperty: animationEnabled
     * {Boolean} If set to true, the transition between zoom levels will be
     *     animated (if supported by the GMaps API for the device used). Set to
     *     false to match the zooming experience of other layer types. Default
     *     is true. Note that the GMaps API does not give us control over zoom
     *     animation, so if set to false, when zooming, this will make the
     *     layer temporarily invisible, wait until GMaps reports the map being
     *     idle, and make it visible again. The result will be a blank layer
     *     for a few moments while zooming.
     */
    animationEnabled: true,

    /**
     * Method: loadMapObject
     * Load the GMap and register appropriate event listeners. If we can't
     *     load GMap2, then display a warning message.
     */
    loadMapObject:function() {
        if (!this.type) {
            this.type = google.maps.MapTypeId.ROADMAP;
        }
        var mapObject;
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // there are already Google layers added to this map
            mapObject = cache.mapObject;
            // increment the layer count
            ++cache.count;
        } else {
            // this is the first Google layer for this map

            var container = this.map.viewPortDiv;
            var div = document.createElement("div");
            div.id = this.map.id + "_GMapContainer";
            div.style.position = "absolute";
            div.style.width = "100%";
            div.style.height = "100%";
            container.appendChild(div);

            // create GMap and shuffle elements
            var center = this.map.getCenter();
            mapObject = new google.maps.Map(div, {
                center: center ?
                    new google.maps.LatLng(center.lat, center.lon) :
                    new google.maps.LatLng(0, 0),
                zoom: this.map.getZoom() || 0,
                mapTypeId: this.type,
                disableDefaultUI: true,
                keyboardShortcuts: false,
                draggable: false,
                disableDoubleClickZoom: true,
                scrollwheel: false,
                streetViewControl: false
            });

            // cache elements for use by any other google layers added to
            // this same map
            cache = {
                mapObject: mapObject,
                count: 1
            };
            OpenLayers.Layer.Google.cache[this.map.id] = cache;
            this.repositionListener = google.maps.event.addListenerOnce(
                mapObject,
                "center_changed",
                OpenLayers.Function.bind(this.repositionMapElements, this)
            );
        }
        this.mapObject = mapObject;
        this.setGMapVisibility(this.visibility);
    },

    /**
     * Method: repositionMapElements
     *
     * Waits until powered by and terms of use elements are available and then
     * moves them so they are clickable.
     */
    repositionMapElements: function() {

        // This is the first time any Google layer in this mapObject has been
        // made visible.  The mapObject needs to know the container size.
        google.maps.event.trigger(this.mapObject, "resize");

        var div = this.mapObject.getDiv().firstChild;
        if (!div || div.childNodes.length < 3) {
            this.repositionTimer = window.setTimeout(
                OpenLayers.Function.bind(this.repositionMapElements, this),
                250
            );
            return false;
        }

        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        var container = this.map.viewPortDiv;

        // move the Map Data popup to the container, if any
        while (div.lastChild.style.display == "none") {
            container.appendChild(div.lastChild);
        }

        // move the ToS and branding stuff up to the container div
        var termsOfUse = div.lastChild;
        container.appendChild(termsOfUse);
        termsOfUse.style.zIndex = "1100";
        termsOfUse.style.bottom = "";
        termsOfUse.className = "olLayerGoogleCopyright olLayerGoogleV3";
        termsOfUse.style.display = "";
        cache.termsOfUse = termsOfUse;

        var poweredBy = div.lastChild;
        container.appendChild(poweredBy);
        poweredBy.style.zIndex = "1100";
        poweredBy.style.bottom = "";
        poweredBy.className = "olLayerGooglePoweredBy olLayerGoogleV3 gmnoprint";
        poweredBy.style.display = "";
        cache.poweredBy = poweredBy;

        this.setGMapVisibility(this.visibility);

    },

    /**
     * APIMethod: onMapResize
     */
    onMapResize: function() {
        if (this.visibility) {
            google.maps.event.trigger(this.mapObject, "resize");
        } else {
            var cache = OpenLayers.Layer.Google.cache[this.map.id];
            if (!cache.resized) {
                var layer = this;
                google.maps.event.addListenerOnce(this.mapObject, "tilesloaded", function() {
                    google.maps.event.trigger(layer.mapObject, "resize");
                    layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
                    delete cache.resized;
                });
            }
            cache.resized = true;
        }
    },

    /**
     * Method: setGMapVisibility
     * Display the GMap container and associated elements.
     *
     * Parameters:
     * visible - {Boolean} Display the GMap elements.
     */
    setGMapVisibility: function(visible) {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            var type = this.type;
            var layers = this.map.layers;
            var layer;
            for (var i=layers.length-1; i>=0; --i) {
                layer = layers[i];
                if (layer instanceof OpenLayers.Layer.Google &&
                            layer.visibility === true && layer.inRange === true) {
                    type = layer.type;
                    visible = true;
                    break;
                }
            }
            var container = this.mapObject.getDiv();
            if (visible === true) {
                this.mapObject.setMapTypeId(type);
                container.style.left = "";
                if (cache.termsOfUse && cache.termsOfUse.style) {
                    cache.termsOfUse.style.left = "";
                    cache.termsOfUse.style.display = "";
                    cache.poweredBy.style.display = "";
                }
                cache.displayed = this.id;
            } else {
                delete cache.displayed;
                container.style.left = "-9999px";
                if (cache.termsOfUse && cache.termsOfUse.style) {
                    cache.termsOfUse.style.display = "none";
                    // move ToU far to the left in addition to setting
                    // display to "none", because at the end of the GMap
                    // load sequence, display: none will be unset and ToU
                    // would be visible after loading a map with a google
                    // layer that is initially hidden.
                    cache.termsOfUse.style.left = "-9999px";
                    cache.poweredBy.style.display = "none";
                }
            }
        }
    },

    /**
     * Method: getMapContainer
     *
     * Returns:
     * {DOMElement} the GMap container's div
     */
    getMapContainer: function() {
        return this.mapObject.getDiv();
    },

  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getMapObjectBoundsFromOLBounds
     *
     * Parameters:
     * olBounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {Object} A MapObject Bounds, translated from olBounds
     *          Returns null if null value is passed in
     */
    getMapObjectBoundsFromOLBounds: function(olBounds) {
        var moBounds = null;
        if (olBounds != null) {
            var sw = this.sphericalMercator ?
              this.inverseMercator(olBounds.bottom, olBounds.left) :
              new OpenLayers.LonLat(olBounds.bottom, olBounds.left);
            var ne = this.sphericalMercator ?
              this.inverseMercator(olBounds.top, olBounds.right) :
              new OpenLayers.LonLat(olBounds.top, olBounds.right);
            moBounds = new google.maps.LatLngBounds(
                new google.maps.LatLng(sw.lat, sw.lon),
                new google.maps.LatLng(ne.lat, ne.lon)
            );
        }
        return moBounds;
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // LonLat - Pixel Translation

    /**
     * APIMethod: getMapObjectLonLatFromMapObjectPixel
     *
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     *
     * Returns:
     * {Object} MapObject LonLat translated from MapObject Pixel
     */
    getMapObjectLonLatFromMapObjectPixel: function(moPixel) {
        var size = this.map.getSize();
        var lon = this.getLongitudeFromMapObjectLonLat(this.mapObject.center);
        var lat = this.getLatitudeFromMapObjectLonLat(this.mapObject.center);
        var res = this.map.getResolution();

        var delta_x = moPixel.x - (size.w / 2);
        var delta_y = moPixel.y - (size.h / 2);

        var lonlat = new OpenLayers.LonLat(
            lon + delta_x * res,
            lat - delta_y * res
        );

        if (this.wrapDateLine) {
            lonlat = lonlat.wrapDateLine(this.maxExtent);
        }
        return this.getMapObjectLonLatFromLonLat(lonlat.lon, lonlat.lat);
    },

    /**
     * APIMethod: getMapObjectPixelFromMapObjectLonLat
     *
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     *
     * Returns:
     * {Object} MapObject Pixel transtlated from MapObject LonLat
     */
    getMapObjectPixelFromMapObjectLonLat: function(moLonLat) {
        var lon = this.getLongitudeFromMapObjectLonLat(moLonLat);
        var lat = this.getLatitudeFromMapObjectLonLat(moLonLat);
        var res = this.map.getResolution();
        var extent = this.map.getExtent();
        var px = new OpenLayers.Pixel(
            (1/res * (lon - extent.left)),
            (1/res * (extent.top - lat))
        );
        return this.getMapObjectPixelFromXY(px.x, px.y);
    },


    /**
     * APIMethod: setMapObjectCenter
     * Set the mapObject to the specified center and zoom
     *
     * Parameters:
     * center - {Object} MapObject LonLat format
     * zoom - {int} MapObject zoom format
     */
    setMapObjectCenter: function(center, zoom) {
        if (this.animationEnabled === false && zoom != this.mapObject.zoom) {
            var mapContainer = this.getMapContainer();
            google.maps.event.addListenerOnce(
                this.mapObject,
                "idle",
                function() {
                    mapContainer.style.visibility = "";
                }
            );
            mapContainer.style.visibility = "hidden";
        }
        this.mapObject.setOptions({
            center: center,
            zoom: zoom
        });
    },


  // Bounds

    /**
     * APIMethod: getMapObjectZoomFromMapObjectBounds
     *
     * Parameters:
     * moBounds - {Object} MapObject Bounds format
     *
     * Returns:
     * {Object} MapObject Zoom for specified MapObject Bounds
     */
    getMapObjectZoomFromMapObjectBounds: function(moBounds) {
        return this.mapObject.getBoundsZoomLevel(moBounds);
    },

    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat

    /**
     * APIMethod: getMapObjectLonLatFromLonLat
     *
     * Parameters:
     * lon - {Float}
     * lat - {Float}
     *
     * Returns:
     * {Object} MapObject LonLat built from lon and lat params
     */
    getMapObjectLonLatFromLonLat: function(lon, lat) {
        var gLatLng;
        if(this.sphericalMercator) {
            var lonlat = this.inverseMercator(lon, lat);
            gLatLng = new google.maps.LatLng(lonlat.lat, lonlat.lon);
        } else {
            gLatLng = new google.maps.LatLng(lat, lon);
        }
        return gLatLng;
    },

  // Pixel

    /**
     * APIMethod: getMapObjectPixelFromXY
     *
     * Parameters:
     * x - {Integer}
     * y - {Integer}
     *
     * Returns:
     * {Object} MapObject Pixel from x and y parameters
     */
    getMapObjectPixelFromXY: function(x, y) {
        return new google.maps.Point(x, y);
    },

    /**
     * APIMethod: destroy
     * Clean up this layer.
     */
    destroy: function() {
        if (this.repositionListener) {
            google.maps.event.removeListener(this.repositionListener);
        }
        if (this.repositionTimer) {
            window.clearTimeout(this.repositionTimer);
        }
        OpenLayers.Layer.Google.prototype.destroy.apply(this, arguments);
    }

};

OpenLayers.Layer.Google.v3.repositionMapElements = function() {
    // This is the first time any Google layer in this mapObject has been
    // made visible.  The mapObject needs to know the container size.
    google.maps.event.trigger(this.mapObject, "resize");

    var div = this.mapObject.getDiv().firstChild;
    if (!div || div.childNodes.length < 3) {
        this.repositionTimer = window.setTimeout(
            OpenLayers.Function.bind(this.repositionMapElements, this),
            250
        );
        return false;
    }

    var cache = OpenLayers.Layer.Google.cache[this.map.id];
    var container = this.map.viewPortDiv;

    // move the ToS and branding stuff up to the container div
    // depends on value of zIndex, which is not robust
    for (var i=div.children.length-1; i>=0; --i) {
        if (div.children[i].style.zIndex == 1000001) {
            var termsOfUse = div.children[i];
            container.appendChild(termsOfUse);
            termsOfUse.style.zIndex = "1100";
            termsOfUse.style.bottom = "";
            termsOfUse.className = "olLayerGoogleCopyright olLayerGoogleV3";
            termsOfUse.style.display = "";
            cache.termsOfUse = termsOfUse;
        }
        if (div.children[i].style.zIndex == 1000000) {
            var poweredBy = div.children[i];
            container.appendChild(poweredBy);
            poweredBy.style.zIndex = "1100";
            poweredBy.style.bottom = "";
            poweredBy.className = "olLayerGooglePoweredBy olLayerGoogleV3 gmnoprint";
            poweredBy.style.display = "";
            cache.poweredBy = poweredBy;
        }
        if (div.children[i].style.zIndex == 10000002) {
            container.appendChild(div.children[i]);
        }
    }

    this.setGMapVisibility(this.visibility);
};


