/**
 * @name InfoBox
 * @version 1.1.6 [May 9, 2011]
 * @author Gary Little (inspired by proof-of-concept code from Pamela Fox of Google)
 * @copyright Copyright 2010 Gary Little [gary at luxcentral.com]
 * @fileoverview InfoBox extends the Google Maps JavaScript API V3 <tt>OverlayView</tt> class.
 * <p>
 * An InfoBox behaves like a <tt>google.maps.InfoWindow</tt>, but it supports several
 * additional properties for advanced styling. An InfoBox can also be used as a map label.
 * <p>
 * An InfoBox also fires the same events as a <tt>google.maps.InfoWindow</tt>.
 * <p>
 * Browsers tested:
 * <p>
 * Mac -- Safari (4.0.4), Firefox (3.6), Opera (10.10), Chrome (4.0.249.43), OmniWeb (5.10.1)
 * <br>
 * Win -- Safari, Firefox, Opera, Chrome (3.0.195.38), Internet Explorer (8.0.6001.18702)
 * <br>
 * iPod Touch/iPhone -- Safari (3.1.2)
 */
/*!
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*jslint browser:true */
/*global google */
/**
 * @name InfoBoxOptions
 * @class This class represents the optional parameter passed to the {@link InfoBox} constructor.
 * @property {string|Node} content The content of the InfoBox (plain text or an HTML DOM node).
 * @property {boolean} disableAutoPan Disable auto-pan on <tt>open</tt> (default is <tt>false</tt>).
 * @property {number} maxWidth The maximum width (in pixels) of the InfoBox. Set to 0 if no maximum.
 * (or the bottom left corner if the <code>alignBottom</code> property is <code>true</code>)
 * to the map pixel corresponding to <tt>position</tt>.
 * @property {LatLng} position The geographic location at which to display the InfoBox.
 * @property {number} zIndex The CSS z-index style value for the InfoBox.
 * Note: This value overrides a zIndex setting specified in the <tt>boxStyle</tt> property.
 * @property {string} boxClass The name of the CSS class defining the styles for the InfoBox container.
 * The default name is <code>infoBox</code>.
 * @property {Object} [boxStyle] An object literal whose properties define specific CSS
 * style values to be applied to the InfoBox. Style values defined here override those that may
 * be defined in the <code>boxClass</code> style sheet. If this property is changed after the
 * InfoBox has been created, all previously set styles (except those defined in the style sheet)
 * are removed from the InfoBox before the new style values are applied.
 * @property {string} closeBoxMargin The CSS margin style value for the close box.
 * The default is "2px" (a 2-pixel margin on all sides).
 * @property {string} closeBoxURL The URL of the image representing the close box.
 * Note: The default is the URL for Google's standard close box.
 * Set this property to "" if no close box is required.
 * @property {Size} infoBoxClearance Minimum offset (in pixels) from the InfoBox to the
 * map edge after an auto-pan.
 * @property {boolean} isHidden Hide the InfoBox on <tt>open</tt> (default is <tt>false</tt>).
 * @property {boolean} alignBottom Align the bottom left corner of the InfoBox to the <code>position</code>
 * location (default is <tt>false</tt> which means that the top left corner of the InfoBox is aligned).
 * @property {string} pane The pane where the InfoBox is to appear (default is "floatPane").
 * Set the pane to "mapPane" if the InfoBox is being used as a map label.
 * Valid pane names are the property names for the <tt>google.maps.MapPanes</tt> object.
 * @property {boolean} enableEventPropagation Propagate mousedown, click, dblclick,
 * and contextmenu events in the InfoBox (default is <tt>false</tt> to mimic the behavior
 * of a <tt>google.maps.InfoWindow</tt>). Set this property to <tt>true</tt> if the InfoBox
 * is being used as a map label. iPhone note: This property setting has no effect; events are
 * always propagated.
 */
/**
 * Creates an InfoBox with the options specified in {@link InfoBoxOptions}.
 * Call <tt>InfoBox.open</tt> to add the box to the map.
 * 
 * @constructor
 * @param {InfoBoxOptions}
 *            [opt_opts]
 *
 */
function InfoBox(opt_opts) {
	opt_opts = opt_opts || {};
	google.maps.OverlayView.apply(this, arguments);
	// Standard options (in common with google.maps.InfoWindow):
	//
	this.content_ = opt_opts.content || "";
	this.disableAutoPan_ = opt_opts.disableAutoPan || false;
	this.maxWidth_ = opt_opts.maxWidth || 0;
	this.pixelOffset_ = opt_opts.pixelOffset || new google.maps.Size(0, 0);
	this.position_ = opt_opts.position || new google.maps.LatLng(0, 0);
	this.zIndex_ = opt_opts.zIndex || null;
	// Additional options (unique to InfoBox):
	//
	this.boxClass_ = opt_opts.boxClass || "infoBox";
	this.boxStyle_ = opt_opts.boxStyle || {};
	this.closeBoxMargin_ = opt_opts.closeBoxMargin || "2px";
	this.closeBoxURL_ = opt_opts.closeBoxURL
			|| "http://www.google.com/intl/en_us/mapfiles/close.gif";
	if (opt_opts.closeBoxURL === "") {
		this.closeBoxURL_ = "";
	}
	this.infoBoxClearance_ = opt_opts.infoBoxClearance
			|| new google.maps.Size(1, 1);
	this.isHidden_ = opt_opts.isHidden || false;
	this.alignBottom_ = opt_opts.alignBottom || false;
	this.pane_ = opt_opts.pane || "floatPane";
	this.enableEventPropagation_ = opt_opts.enableEventPropagation || false;
	this.div_ = null;
	this.closeListener_ = null;
	this.eventListener1_ = null;
	this.eventListener2_ = null;
	this.eventListener3_ = null;
	this.moveListener_ = null;
	this.contextListener_ = null;
	this.fixedWidthSet_ = null;
}
/*
 * InfoBox extends OverlayView in the Google Maps API v3.
 */

InfoBox.prototype.remove = function() {
	if (this.div_) {
		this.div_.parentNode.removeChild(this.div_);
		this.div_ = null;
	}
};

InfoBox.prototype = new google.maps.OverlayView();
/**
 * Creates the DIV representing the InfoBox.
 * 
 * @private
 */
InfoBox.prototype.createInfoBoxDiv_ = function() {
	var bw;
	var me = this;
	// This handler prevents an event in the InfoBox from being passed on to the
	// map.
	//
	var cancelHandler = function(e) {
		e.cancelBubble = true;
		if (e.stopPropagation) {
			e.stopPropagation();
		}
	};
	// This handler ignores the current event in the InfoBox and conditionally
	// prevents
	// the event from being passed on to the map. It is used for the contextmenu
	// event.
	//
	var ignoreHandler = function(e) {
		e.returnValue = false;
		if (e.preventDefault) {
			e.preventDefault();
		}
		if (!me.enableEventPropagation_) {
			cancelHandler(e);
		}
	};
	if (!this.div_) {
		this.div_ = document.createElement("div");
		this.setBoxStyle_();
		if (typeof this.content_.nodeType === "undefined") {
			this.div_.innerHTML = this.getCloseBoxImg_() + this.content_;
		} else {
			this.div_.innerHTML = this.getCloseBoxImg_();
			this.div_.appendChild(this.content_);
		}
		// Add the InfoBox DIV to the DOM
		this.getPanes()[this.pane_].appendChild(this.div_);
		this.addClickHandler_();
		if (this.div_.style.width) {
			this.fixedWidthSet_ = true;
		} else {
			if (this.maxWidth_ !== 0 && this.div_.offsetWidth > this.maxWidth_) {
				this.div_.style.width = this.maxWidth_;
				this.div_.style.overflow = "auto";
				this.fixedWidthSet_ = true;
			} else { // The following code is needed to overcome problems
						// with MSIE
				bw = this.getBoxWidths_();
				this.div_.style.width = (this.div_.offsetWidth - bw.left - bw.right)
						+ "px";
				this.fixedWidthSet_ = false;
			}
		}
		this.panBox_(this.disableAutoPan_);
		if (!this.enableEventPropagation_) {
			// Cancel event propagation.
			//
			this.eventListener1_ = google.maps.event.addDomListener(this.div_,
					"mousedown", cancelHandler);
			this.eventListener2_ = google.maps.event.addDomListener(this.div_,
					"click", cancelHandler);
			this.eventListener3_ = google.maps.event.addDomListener(this.div_,
					"dblclick", cancelHandler);
		}
		this.contextListener_ = google.maps.event.addDomListener(this.div_,
				"contextmenu", ignoreHandler);
		/**
		 * This event is fired when the DIV containing the InfoBox's content is
		 * attached to the DOM.
		 * 
		 * @name InfoBox#domready
		 * @event
		 */
		google.maps.event.trigger(this, "domready");
	}
};
/**
 * Returns the HTML <IMG> tag for the close box.
 * 
 * @private
 */
InfoBox.prototype.getCloseBoxImg_ = function() {
	var img = "";
	if (this.closeBoxURL_ !== "") {
		img = "<img";
		img += " src='" + this.closeBoxURL_ + "'";
		img += " align=right"; // Do this because Opera chokes on style='float:
								// right;'
		img += " style='";
		img += " position: absolute;"; // Required by MSIE
		img += " cursor: pointer;";
		img += " margin: " + this.closeBoxMargin_ + ";";
		img += "'>";
	}
	return img;
};
/**
 * Adds the click handler to the InfoBox close box.
 * 
 * @private
 */
InfoBox.prototype.addClickHandler_ = function() {
	var closeBox;
	if (this.closeBoxURL_ !== "") {
		closeBox = this.div_.firstChild;
		this.closeListener_ = google.maps.event.addDomListener(closeBox,
				'click', this.getCloseClickHandler_());
	} else {
		this.closeListener_ = null;
	}
};
/**
 * Returns the function to call when the user clicks the close box of an
 * InfoBox.
 * 
 * @private
 */
InfoBox.prototype.getCloseClickHandler_ = function() {
	var me = this;
	return function(e) {
		// 1.0.3 fix: Always prevent propagation of a close box click to the
		// map:
		e.cancelBubble = true;
		if (e.stopPropagation) {
			e.stopPropagation();
		}
		me.close();
		/**
		 * This event is fired when the InfoBox's close box is clicked.
		 * 
		 * @name InfoBox#closeclick
		 * @event
		 */
		google.maps.event.trigger(me, "closeclick");
	};
};
/**
 * Pans the map so that the InfoBox appears entirely within the map's visible
 * area.
 * 
 * @private
 */
InfoBox.prototype.panBox_ = function(disablePan) {
	var map;
	var bounds;
	var xOffset = 0, yOffset = 0;
	if (!disablePan) {
		map = this.getMap();
		if (map instanceof google.maps.Map) { // Only pan if attached to map,
												// not panorama
			if (!map.getBounds().contains(this.position_)) {
				// Marker not in visible area of map, so set center
				// of map to the marker position first.
				map.setCenter(this.position_);
			}
			bounds = map.getBounds();
			var mapDiv = map.getDiv();
			var mapWidth = mapDiv.offsetWidth;
			var mapHeight = mapDiv.offsetHeight;
			var iwOffsetX = this.pixelOffset_.width;
			var iwOffsetY = this.pixelOffset_.height;
			var iwWidth = this.div_.offsetWidth;
			var iwHeight = this.div_.offsetHeight;
			var padX = this.infoBoxClearance_.width;
			var padY = this.infoBoxClearance_.height;
			var pixPosition = this.getProjection().fromLatLngToContainerPixel(
					this.position_);
			if (pixPosition.x < (-iwOffsetX + padX)) {
				xOffset = pixPosition.x + iwOffsetX - padX;
			} else if ((pixPosition.x + iwWidth + iwOffsetX + padX) > mapWidth) {
				xOffset = pixPosition.x + iwWidth + iwOffsetX + padX - mapWidth;
			}
			if (this.alignBottom_) {
				if (pixPosition.y < (-iwOffsetY + padY + iwHeight)) {
					yOffset = pixPosition.y + iwOffsetY - padY - iwHeight;
				} else if ((pixPosition.y + iwOffsetY + padY) > mapHeight) {
					yOffset = pixPosition.y + iwOffsetY + padY - mapHeight;
				}
			} else {
				if (pixPosition.y < (-iwOffsetY + padY)) {
					yOffset = pixPosition.y + iwOffsetY - padY;
				} else if ((pixPosition.y + iwHeight + iwOffsetY + padY) > mapHeight) {
					yOffset = pixPosition.y + iwHeight + iwOffsetY + padY
							- mapHeight;
				}
			}
			if (!(xOffset === 0 && yOffset === 0)) {
				// Move the map to the shifted center.
				//
				var c = map.getCenter();
				map.panBy(xOffset, yOffset);
			}
		}
	}
};
/**
 * Sets the style of the InfoBox by setting the style sheet and applying other
 * specific styles requested.
 * 
 * @private
 */
InfoBox.prototype.setBoxStyle_ = function() {
	var i, boxStyle;
	if (this.div_) {
		// Apply style values from the style sheet defined in the boxClass
		// parameter:
		this.div_.className = this.boxClass_;
		// Clear existing inline style values:
		this.div_.style.cssText = "";
		// Apply style values defined in the boxStyle parameter:
		boxStyle = this.boxStyle_;
		for (i in boxStyle) {
			if (boxStyle.hasOwnProperty(i)) {
				this.div_.style[i] = boxStyle[i];
			}
		}
		// Fix up opacity style for benefit of MSIE:
		//
		if (typeof this.div_.style.opacity !== "undefined"
				&& this.div_.style.opacity !== "") {
			this.div_.style.filter = "alpha(opacity="
					+ (this.div_.style.opacity * 100) + ")";
		}
		// Apply required styles:
		//
		this.div_.style.position = "absolute";
		this.div_.style.visibility = 'hidden';
		if (this.zIndex_ !== null) {
			this.div_.style.zIndex = this.zIndex_;
		}
	}
};
/**
 * Get the widths of the borders of the InfoBox.
 * 
 * @private
 * @return {Object} widths object (top, bottom left, right)
 */
InfoBox.prototype.getBoxWidths_ = function() {
	var computedStyle;
	var bw = {
		top : 0,
		bottom : 0,
		left : 0,
		right : 0
	};
	var box = this.div_;
	if (document.defaultView && document.defaultView.getComputedStyle) {
		computedStyle = box.ownerDocument.defaultView.getComputedStyle(box, "");
		if (computedStyle) {
			// The computed styles are always in pixel units (good!)
			bw.top = parseInt(computedStyle.borderTopWidth, 10) || 0;
			bw.bottom = parseInt(computedStyle.borderBottomWidth, 10) || 0;
			bw.left = parseInt(computedStyle.borderLeftWidth, 10) || 0;
			bw.right = parseInt(computedStyle.borderRightWidth, 10) || 0;
		}
	} else if (document.documentElement.currentStyle) { // MSIE
		if (box.currentStyle) {
			// The current styles may not be in pixel units, but assume they are
			// (bad!)
			bw.top = parseInt(box.currentStyle.borderTopWidth, 10) || 0;
			bw.bottom = parseInt(box.currentStyle.borderBottomWidth, 10) || 0;
			bw.left = parseInt(box.currentStyle.borderLeftWidth, 10) || 0;
			bw.right = parseInt(box.currentStyle.borderRightWidth, 10) || 0;
		}
	}
	return bw;
};
/**
 * Invoked when <tt>close</tt> is called. Do not call it directly.
 */
InfoBox.prototype.onRemove = function() {
	if (this.div_) {
		this.div_.parentNode.removeChild(this.div_);
		this.div_ = null;
	}
};
/**
 * Draws the InfoBox based on the current map projection and zoom level.
 */
InfoBox.prototype.draw = function() {
	this.createInfoBoxDiv_();
	var pixPosition = this.getProjection().fromLatLngToDivPixel(this.position_);
	this.div_.style.left = (pixPosition.x + this.pixelOffset_.width) + "px";
	if (this.alignBottom_) {
		this.div_.style.bottom = -(pixPosition.y - this.pixelOffset_.height)
				+ "px";
	} else {
		this.div_.style.top = (pixPosition.y + this.pixelOffset_.height) + "px";
	}
	if (this.isHidden_) {
		this.div_.style.visibility = 'hidden';
	} else {
		this.div_.style.visibility = "visible";
	}
};
/**
 * Sets the options for the InfoBox. Note that changes to the <tt>maxWidth</tt>,
 * <tt>closeBoxMargin</tt>, <tt>closeBoxURL</tt>, and
 * <tt>enableEventPropagation</tt> properties have no affect until the current
 * InfoBox is <tt>close</tt>d and a new one is <tt>open</tt>ed.
 * 
 * @param {InfoBoxOptions}
 *            opt_opts
 */
InfoBox.prototype.setOptions = function(opt_opts) {
	if (typeof opt_opts.boxClass !== "undefined") { // Must be first
		this.boxClass_ = opt_opts.boxClass;
		this.setBoxStyle_();
	}
	if (typeof opt_opts.boxStyle !== "undefined") { // Must be second
		this.boxStyle_ = opt_opts.boxStyle;
		this.setBoxStyle_();
	}
	if (typeof opt_opts.content !== "undefined") {
		this.setContent(opt_opts.content);
	}
	if (typeof opt_opts.disableAutoPan !== "undefined") {
		this.disableAutoPan_ = opt_opts.disableAutoPan;
	}
	if (typeof opt_opts.maxWidth !== "undefined") {
		this.maxWidth_ = opt_opts.maxWidth;
	}
	if (typeof opt_opts.pixelOffset !== "undefined") {
		this.pixelOffset_ = opt_opts.pixelOffset;
	}
	if (typeof opt_opts.position !== "undefined") {
		this.setPosition(opt_opts.position);
	}
	if (typeof opt_opts.zIndex !== "undefined") {
		this.setZIndex(opt_opts.zIndex);
	}
	if (typeof opt_opts.closeBoxMargin !== "undefined") {
		this.closeBoxMargin_ = opt_opts.closeBoxMargin;
	}
	if (typeof opt_opts.closeBoxURL !== "undefined") {
		this.closeBoxURL_ = opt_opts.closeBoxURL;
	}
	if (typeof opt_opts.infoBoxClearance !== "undefined") {
		this.infoBoxClearance_ = opt_opts.infoBoxClearance;
	}
	if (typeof opt_opts.isHidden !== "undefined") {
		this.isHidden_ = opt_opts.isHidden;
	}
	if (typeof opt_opts.enableEventPropagation !== "undefined") {
		this.enableEventPropagation_ = opt_opts.enableEventPropagation;
	}
	if (this.div_) {
		this.draw();
	}
};
/**
 * Sets the content of the InfoBox. The content can be plain text or an HTML DOM
 * node.
 * 
 * @param {string|Node}
 *            content
 */
InfoBox.prototype.setContent = function(content) {
	this.content_ = content;
	if (this.div_) {
		if (this.closeListener_) {
			google.maps.event.removeListener(this.closeListener_);
			this.closeListener_ = null;
		}
		// Odd code required to make things work with MSIE.
		//
		if (!this.fixedWidthSet_) {
			this.div_.style.width = "";
		}
		if (typeof content.nodeType === "undefined") {
			this.div_.innerHTML = this.getCloseBoxImg_() + content;
		} else {
			this.div_.innerHTML = this.getCloseBoxImg_();
			this.div_.appendChild(content);
		}
		// Perverse code required to make things work with MSIE.
		// (Ensures the close box does, in fact, float to the right.)
		//
		if (!this.fixedWidthSet_) {
			this.div_.style.width = this.div_.offsetWidth + "px";
			if (typeof content.nodeType === "undefined") {
				this.div_.innerHTML = this.getCloseBoxImg_() + content;
			} else {
				this.div_.innerHTML = this.getCloseBoxImg_();
				// Note: don't append the content node again
			}
		}
		this.addClickHandler_();
	}
	/**
	 * This event is fired when the content of the InfoBox changes.
	 * 
	 * @name InfoBox#content_changed
	 * @event
	 */
	google.maps.event.trigger(this, "content_changed");
};
/**
 * Sets the geographic location of the InfoBox.
 * 
 * @param {LatLng}
 *            latlng
 */
InfoBox.prototype.setPosition = function(latlng) {
	this.position_ = latlng;
	if (this.div_) {
		this.draw();
	}
	/**
	 * This event is fired when the position of the InfoBox changes.
	 * 
	 * @name InfoBox#position_changed
	 * @event
	 */
	google.maps.event.trigger(this, "position_changed");
};
/**
 * Sets the zIndex style for the InfoBox.
 * 
 * @param {number}
 *            index
 */
InfoBox.prototype.setZIndex = function(index) {
	this.zIndex_ = index;
	if (this.div_) {
		this.div_.style.zIndex = index;
	}
	/**
	 * This event is fired when the zIndex of the InfoBox changes.
	 * 
	 * @name InfoBox#zindex_changed
	 * @event
	 */
	google.maps.event.trigger(this, "zindex_changed");
};
/**
 * Returns the content of the InfoBox.
 * 
 * @returns {string}
 */
InfoBox.prototype.getContent = function() {
	return this.content_;
};
/**
 * Returns the geographic location of the InfoBox.
 * 
 * @returns {LatLng}
 */
InfoBox.prototype.getPosition = function() {
	return this.position_;
};
/**
 * Returns the zIndex for the InfoBox.
 * 
 * @returns {number}
 */
InfoBox.prototype.getZIndex = function() {
	return this.zIndex_;
};
/**
 * Shows the InfoBox.
 */
InfoBox.prototype.show = function() {
	this.isHidden_ = false;
	if (this.div_) {
		this.div_.style.visibility = "visible";
	}
};
/**
 * Hides the InfoBox.
 */
InfoBox.prototype.hide = function() {
	this.isHidden_ = true;
	if (this.div_) {
		this.div_.style.visibility = "hidden";
	}
};
/**
 * Adds the InfoBox to the specified map or Street View panorama. If
 * <tt>anchor</tt> (usually a <tt>google.maps.Marker</tt>) is specified,
 * the position of the InfoBox is set to the position of the <tt>anchor</tt>.
 * If the anchor is dragged to a new location, the InfoBox moves as well.
 * 
 * @param {Map|StreetViewPanorama}
 *            map
 * @param {MVCObject}
 *            [anchor]
 */
InfoBox.prototype.open = function(map, anchor) {
	var me = this;
	if (anchor) {
		this.position_ = anchor.getPosition();
		this.moveListener_ = google.maps.event.addListener(anchor,
				"position_changed", function() {
					me.setPosition(this.getPosition());
				});
	}
	this.setMap(map);
	if (this.div_) {
		this.panBox_();
	}
};
/**
 * Removes the InfoBox from the map.
 */
InfoBox.prototype.close = function() {
	if (this.closeListener_) {
		google.maps.event.removeListener(this.closeListener_);
		this.closeListener_ = null;
	}
	if (this.eventListener1_) {
		google.maps.event.removeListener(this.eventListener1_);
		google.maps.event.removeListener(this.eventListener2_);
		google.maps.event.removeListener(this.eventListener3_);
		this.eventListener1_ = null;
		this.eventListener2_ = null;
		this.eventListener3_ = null;
	}
	if (this.moveListener_) {
		google.maps.event.removeListener(this.moveListener_);
		this.moveListener_ = null;
	}
	if (this.contextListener_) {
		google.maps.event.removeListener(this.contextListener_);
		this.contextListener_ = null;
	}
	this.setMap(null);
};