Source: core/kekule.common.js

/**
 * @fileoverview
 * Some global symbols used in Kekule library.
 * @author Partridge Jiang
 */

/*
 * requires /lan/classes.js
 * requires /utils/kekule.utils.js
 * requires /localization
 */

"use strict";

(function(){

//var OT = Kekule.OBJDEF_TEXTS;

// modify defineProp method of ObjectEx, add auto title/description supports
if (Kekule.PROP_AUTO_TITLE)
{
	var originMethod = ClassEx.getPrototype(ObjectEx).defineProp;
	var OBJ_PROP_TITLE_TEXT_PREFIX = 'TITLE_';
	var OBJ_PROP_DESCRIPTION_TEXT_PREFIX = 'DES_';
	var newMethod = function(propName, options)
	{
		if (!options.title && !options.description)  // all not set, auto decide
		{
			var className = this.getClassName();
			if (className.startsWith('Kekule.'))  // remove Kekule prefix
			{
				className = className.substr(7);
			}
			//var textObj = Object.getCascadeFieldValue(className, Kekule.OBJDEF_TEXTS);
			//if (textObj)
			{
				//var titleField = Kekule.OBJDEF_TEXTS.TITLE_PREFIX + propName;
				//var desField = Kekule.OBJDEF_TEXTS.DESCRIPTION_PREFIX + propName;
				var titlePrefix = OBJ_PROP_TITLE_TEXT_PREFIX;
				var destPrefix = OBJ_PROP_DESCRIPTION_TEXT_PREFIX;
				var titleField = titlePrefix + propName;
				var desField = destPrefix + propName;
				var title = Kekule.Localization.findValue('OBJDEF_TEXTS.' + className + '.' + titleField);
				var description = Kekule.Localization.findValue('OBJDEF_TEXTS.' + className + '.' + desField);
				options.title = title; //textObj[titleField];
				options.description = description; //textObj[desField];
			}
		}
		return originMethod.apply(this, [propName, options]);
	};
	ClassEx.getPrototype(ObjectEx).defineProp = newMethod;
}

/**
 * Enumeration of exception types.
 * @class
 */
Kekule.ExceptionLevel = {
	/** Fatal error, usually cause the stop of program execution. */
	ERROR: -1,
	/** Serious exception, but the program can still run. */
	WARNING: -2,
	/** Minor exception, user usually need not to know about it. */
	NOTE: -3,
	/** Log message, just for debug use. */
	LOG: -4
};

/**
 * Throw an exception in ExceptionHandler, same as {@link Kekule.ExceptionHandler.throwException}
 */
Kekule.throwException = function(e, exceptionLevel)
{
	if (Kekule.exceptionHandler)
	{
		return Kekule.exceptionHandler.throwException(e, exceptionLevel);
	}
	else
	{
		var EL = Kekule.ExceptionLevel;
		if ((!exceptionLevel) || (exceptionLevel === EL.ERROR))
		{
			if (typeof(e) === 'string')
				e = new Kekule.Exception(e);
			throw e;
		}
		else
		{
			if (typeof(console) !== 'undefined')
			{
				if (typeof(e) !== 'string')
					e = e.message;
				var method = (exceptionLevel === EL.WARNING)? console.warn:
					(exceptionLevel === EL.NOTE)? console.info:
					console.log;
				if (method)
					method(e);
				else
					console.log(e);
			}
		}
	}
};
/**
 * Returns the message of exception object or string.
 * @param {Variant} e
 * @returns {String}
 */
Kekule.getExceptionMsg = function(e)
{
	if (typeof(e) === 'string')
		return e;
	else if (typeof(e) === 'object')
		return e.message;
	else
		return '';
};
/**
 * Throw an exception in ExceptionHandler, same as {@link Kekule.ExceptionHandler.throwException}
 * @function
 */
Kekule.raise = Kekule.throwException;
/**
 * Throw an {@link Kekule.Error} in ExceptionHandler.
 */
Kekule.error = function(e)
{
	/*
	if (typeof(e) == 'string')
		e = new Kekule.Error(e);
	if (Kekule.exceptionHandler)
		return Kekule.exceptionHandler.throwException(e);
	else
		throw e;
	*/
	return Kekule.raise(e, Kekule.ExceptionLevel.ERROR);
};
/**
 * Throw an {@link Kekule.ChemError} in ExceptionHandler.
 */
Kekule.chemError = function(e)
{
	if (typeof(e) == 'string')
		e = new Kekule.ChemError(e);
	/*
	if (Kekule.exceptionHandler)
		return Kekule.exceptionHandler.throwException(e);
	else
		throw e;
	*/
	return Kekule.error(e);
};

/**
 * Raise a warning message (but do not raise error).
 * @param e
 */
Kekule.warn = function(e)
{
	return Kekule.raise(e, Kekule.ExceptionLevel.WARNING);
};
/**
 * Raise a informative hint message.
 * @param e
 */
Kekule.notify = function(e)
{
	return Kekule.raise(e, Kekule.ExceptionLevel.NOTE);
};
/**
 * Raise a log message.
 * @param e
 */
Kekule.log = function(e)
{
	return Kekule.raise(e, Kekule.ExceptionLevel.LOG);
};


/**
 * Check if localization resource is imported and available.
 * If it returns true, l10n constants can be used.
 * @returns {Bool}
 */
Kekule.hasLocalRes = function()
{
	return !!Kekule.LOCAL_RES;
};

/**
 * A class to implement str => variant mapping.
 * @class
 */
Kekule.HashEx = Class.create(
/** @lends Kekule.HashEx# */
{
	/** @private */
	CLASS_NAME: 'Kekule.HashEx',
	/** @private */
	PROP_NAME_PREFIX: '__$key$__',
	/** @constructs */
	initialize: function()
	{
		this._map = {};
	},
	/**
	 * Free resources.
	 */
	finalize: function()
	{
		this._map = null;
	},
	/** @private */
	keyToPropName: function(key)
	{
		return this.PROP_NAME_PREFIX + key;  // add a prefix to avoid possible name conflicts with default object
	},
	/**
	 * Check whether a value has been associated to the key string.
	 * @param {String} key
	 * @returns {Bool}
	 */
	has: function(key)
	{
		return this._map.hasOwnProperty(this.keyToPropName(key));
	},
	/**
	 * Set the value for the key string.
	 * @param {String} key
	 * @param {Variant} value
	 */
	set: function(key, value)
	{
		this._map[this.keyToPropName(key)] = value;
		return this;
	},
	/**
	 * Returns the value associated to the key string,
	 * @param {String} key
	 * @param {Variant} defaultValue Return this value if key does not exist.
	 * @returns {Variant}
	 */
	get: function(key, defaultValue)
	{
		var propName = this.keyToPropName(key);
		if (this._map.hasOwnProperty(propName))
			return this._map[propName];
		else
			return defaultValue;
	},
	/**
	 * Removes any value associated to the key string.
	 * @param {String} key
	 */
	remove: function(key)
	{
		var propName = this.keyToPropName(key);
		if (this._map.hasOwnProperty(propName))
		{
			delete this._map[propName];
		}
		return this;
	},
	/**
	 * Clear all key and values in map.
	 */
	clear: function()
	{
		this._map = {};
	}
});

/**
 * A class to implement obj => obj mappings.
 * @class
 *
 * @params {Bool} nonWeak Whether try to create this map as a weak one (do not disturb GC).
 */
Kekule.MapEx = Class.create(
/** @lends Kekule.MapEx# */
{
	/** @private */
	CLASS_NAME: 'Kekule.MapEx',
	/** @constructs */
	initialize: function(nonWeak)
	{
		this.isWeak = !nonWeak;
		if (!Kekule.MapEx._inited)
			Kekule.MapEx._init();
		if ((!Kekule.MapEx._implementation) || (!this.isWeak))  // use JavaScript implementation
		{
			this.keys = [];
			this.values = [];
		}
		else  // use built-in implementation
			this._implementation = new Kekule.MapEx._implementation();
	},
	/**
	 * Free resources.
	 */
	finalize: function($super)
	{
		if (!this._implementation)
		{
			this.keys = null;
			this.values = null;
		}
	},
	/**
	 * Set the value for the key object.
	 * @param {Variant} key
	 * @param {Variant} value
	 */
	set: function(key, value)
	{
		if (this._implementation)
			this._implementation.set(key, value);
		else
		{
			var index = this.keys.indexOf(key);
			if (index >= 0)
				this.values[index] = value;
			else
			{
				this.keys.push(key);
				this.values.push(value);
			}
		}
		//console.log(key, value, this.get(key));
		return this;
	},
	/**
	 * Returns the value associated to the key object,
	 * @param {Variant} key
	 * @param {Variant} defaultValue Return this value if key does not exist.
	 * @returns {Variant}
	 */
	get: function(key, defaultValue)
	{
		if (this._implementation)
			return this._implementation.get(key, defaultValue);
		else
		{
			var index = this.keys.indexOf(key);
			if (index >= 0)
				return this.values[index];
			else  // not found
				return defaultValue;
		}
	},
	/**
	 * Check whether a value has been associated to the key object.
	 * @param {Variant} key
	 * @returns {Bool}
	 */
	has: function(key)
	{
		if (this._implementation)
			return this._implementation.has(key);
		else
		{
			var index = this.keys.indexOf(key);
			return index >= 0;
		}
	},
	/**
	 * Removes any value associated to the key object.
	 * @param {Object} key
	 */
	remove: function(key)
	{
		if (this._implementation)
			return this._implementation['delete'](key);  // avoid IE regard delete as a reserved word
		else
		{
			var index = this.keys.indexOf(key);
			if (index >= 0)
			{
				this.keys.splice(index, 1);
				this.values.splice(index, 1);
			}
		}
		return this;
	},
	/**
	 * Clear all key and values in map.
	 */
	clear: function()
	{
		if (!this._implementation)
		{
			this.keys = [];
			this.values = [];
		}
		else
		{
			Kekule.error(Kekule.$L('ErrorMsg.CANNOT_CLEAR_WEAKMAP')/*Kekule.ErrorMsg.CANNOT_CLEAR_WEAKMAP*/);
		}
		return this;
	},
	/**
	 * Returns an array of all keys in map.
	 * @returns {Array}
	 */
	getKeys: function()
	{
		if (!this._implementation)
			return [].concat(this.keys);  // clone the array, avoid modification
		else  // weak map, can not return keys
		{
			Kekule.error(Kekule.$L('ErrorMsg.CANNOT_GET_KEY_LIST_IN_WEAKMAP')/*Kekule.ErrorMsg.CANNOT_GET_KEY_LIST_IN_WEAKMAP*/);
			return [];
		}
	},
	/**
	 * Returns an array of all values in map.
	 * @returns {Array}
	 */
	getValues: function()
	{
		if (!this._implementation)
			return this.values;
		else  // weak map, can not return keys
		{
			Kekule.error(Kekule.$L('ErrorMsg.CANNOT_GET_VALUE_LIST_IN_WEAKMAP')/*Kekule.ErrorMsg.CANNOT_GET_VALUE_LIST_IN_WEAKMAP*/);
			return [];
		}
	}
});
/** @private */
Kekule.MapEx._init = function()
{
	if ($jsRoot.WeakMap)  // Fx6 and above, use built-in WeakMap object
		Kekule.MapEx._implementation = $jsRoot.WeakMap;
	else
		Kekule.MapEx._implementation = null;  // use JavaScript implementation
	Kekule.MapEx._inited = true;
};
Kekule.MapEx._inited = false;


/**
 * A class to implement obj1, obj2 => obj mappings.
 * @class
 *
 * @params {Bool} nonWeak Whether try to create this map as a weak one (do not disturb GC).
 */
Kekule.TwoTupleMapEx = Class.create(
/** @lends Kekule.TwoTupleMapEx# */
{
	/** @private */
	CLASS_NAME: 'Kekule.TwoTupleMapEx',
	/** @constructs */
	initialize: function(nonWeak)
	{
		this.nonWeak = nonWeak;
		this.map = new Kekule.MapEx(nonWeak);
	},
	/**
	 * Free resources.
	 */
	finalize: function()
	{
		this.map.finalize();
	},
	/** @private */
	getSecondLevelMap: function(key1, allowCreate)
	{
		var result = this.map.get(key1);
		if ((!result) && allowCreate)
		{
			result = new Kekule.MapEx(this.nonWeak);
			this.map.set(key1, result);
		}
		return result;
	},

	/**
	 * Set the value for the key object.
	 * @param {Variant} key1
	 * @param {Variant} key2
	 * @param {Variant} value
	 */
	set: function(key1, key2, value)
	{
		var map = this.getSecondLevelMap(key1, true);
		map.set(key2, value);
		return this;
	},
	/**
	 * Returns the value associated to the key object,
	 * @param {Variant} key1
	 * @param {Variant} key2
	 * @param {Variant} defaultValue Return this value if key does not exist.
	 * @returns {Variant}
	 */
	get: function(key1, key2, defaultValue)
	{
		var map = this.getSecondLevelMap(key1, false);
		if (map)
			return map.get(key2, defaultValue);
		else
			return defaultValue;
	},
	/**
	 * Check whether a value has been associated to the key object.
	 * @param {Variant} key1
	 * @param {Variant} key2
	 * @returns {Bool}
	 */
	has: function(key1, key2)
	{
		var map = this.getSecondLevelMap(key1, false);
		if (map)
			return map.has(key2);
		else
			return false;
	},
	/**
	 * Removes any value associated to the key object.
	 * @param {Variant} key1
	 * @param {Variant} key2
	 */
	remove: function(key1, key2)
	{
		var map = this.getSecondLevelMap(key1, false);
		if (map)
			return map.remove(key2);
	},
	/**
	 * Clear all key and values in map.
	 */
	clear: function()
	{
		this.map.clear();
	}
});

/**
 * Enumeration of coordinate mode.
 * @class
 */
Kekule.CoordMode = {
	/** Unknown dimension, not useful in most cases. */
	UNKNOWN: 0,
	/** 2D coordinate */
	COORD2D: 2,
	/** 3D coordinate */
	COORD3D: 3
};

/**
 * Class to help to define some classes with similar interfaces.
 * @class
 * @@private
 */
Kekule.ClassDefineUtils = {
	/// Methods to expand support for size2D and size3D property
	/**
	 * @class
	 * @private
	 */
	CommonSizeMethods:
	{
		/**
		 * Get size of specified mode.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 * @param {Bool} allowSizeBorrow If corresponding size of 2D/3D not found, whether
		 *   size of another mode can be used instead.
		 *   If true, 2D size can be expanded to 3D one as {x, y, 0} and 3D
		 *   reduced to 2D one as {x, y}.
		 * @returns {Hash}
		 */
		getSizeOfMode: function(coordMode, allowSizeBorrow)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.getSize3D(allowSizeBorrow);
			else
				return this.getSize2D(allowSizeBorrow);
		},
		/**
		 * Set size of specified mode.
		 * @param {Hash} value Value of size. {x, y} or {x, y, z}.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 */
		setSizeOfMode: function(value, coordMode)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.setSize3D(value);
			else
				return this.setSize2D(value);
		},
		/**
		 * Returns a min 2D box containing this object.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Hash}
		 */
		getBoxOfMode: function(coordMode, allowCoordBorrow)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.getBox3D(allowCoordBorrow);
			else
				return this.getBox2D(allowCoordBorrow);
		}
	},
	/**
	 * @class
	 * @private
	 */
	Size2DMethods:
	{
		/*
		 * Get size2D property, if this property is null, then create new hash for it.
		 * Note this method will return a direct instance of size2D hash (instead of a
		 * clone as in getSize2D).
		 * @returns {Hash} {x, y}
		 */
		fetchSize2D: function()
		{
			var c = this.getPropStoreFieldValue('size2D');
			if (!c)
			{
				c = {};
				this.setPropStoreFieldValue('size2D', c);
			}
			return c;
		},
		/** @private */
		notifySize2DChanged: function(newValue)
		{
			this.notifyPropSet('size2D', newValue);
		},
		/**
		 * Check if this object has a 2D size.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Bool}
		 */
		hasSize2D: function(allowSizeBorrow)
		{
			var c = this.getPropStoreFieldValue('size2D');  //this.getCoord2D();
			var result = (c) && ((typeof(c.x) != 'undefined') || (typeof(c.y) != 'undefined'));
			if ((!result) && allowSizeBorrow)
				result = this.hasSize3D? this.hasSize3D(): false;
			return result;
		},
		/**
		 * Returns a min 2D box containing this object.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Hash}
		 */
		getBox2D: function(allowCoordBorrow)
		{
			var coord1 = this.getCoord2D(allowCoordBorrow) || {'x': 0, 'y': 0};
			var size = this.getSize2D(allowCoordBorrow);
			if (/*coord1 &&*/ size && (size.x || size.y))
			{
				// usually coord point is on top-left corner, in object coord system, y is on the largest edge
				// of object, so -size.y is used to get the bottom edge of box.
				var delta = {'x': size.x, 'y': -size.y};
				var coord2 = Kekule.CoordUtils.add(coord1, delta);
				return {'x1': coord1.x, 'y1': coord1.y, 'x2': coord2.x, 'y2': coord2.y};
			}
			else
				return {'x1': coord1.x, 'y1': coord1.y, 'x2': coord1.x, 'y2': coord1.y};
		},
		/**
		 * Get x (width) value of size2D property.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Float} x
		 */
		get2DSizeX: function(allowSizeBorrow)
		{
			var c = this.getSize2D(allowSizeBorrow);
			return c? c.x || 0: 0;
		},
		/**
		 * Change x (width) value of size2D property.
		 * @param {Float} x
		 */
		set2DSizeX: function(x)
		{
			var c = fetchSize2D();
			if (c.x != x)
			{
				c.x = x;
				notifySize2DChanged(c);
			}
		},
		/**
		 * Get y (height) value of size2D property.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Float} y
		 */
		get2DSizeY: function(allowSizeBorrow)
		{
			var c = this.getSize2D(allowSizeBorrow);
			return c? c.y || 0: 0;
		},
		/**
		 * Change y (height) value of size2D property.
		 * @param {Float} y
		 */
		set2DSizeY: function(y)
		{
			var c = fetchSize2D();
			if (c.y != y)
			{
				c.y = y;
				notifySize2DChanged(c);
			}
		}
	},
	/**
	 * @class
	 * @private
	 */
	Size3DMethods:
	{
		/*
		 * Get size3D property, if this property is null, then create new hash for it.
		 * Note this method will return a direct instance of size3D hash (instead of a
		 * clone as in getSize3D).
		 * @returns {Hash} {x, y}
		 */
		fetchSize3D: function()
		{
			var c = this.getPropStoreFieldValue('size3D');
			if (!c)
			{
				c = {};
				this.setPropStoreFieldValue('size3D', c);
			}
			return c;
		},
		/** @private */
		notifySize3DChanged: function(newValue)
		{
			this.notifyPropSet('size3D', newValue);
		},
		/**
		 * Check if this object has a 3D size.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Bool}
		 */
		hasSize3D: function(allowSizeBorrow)
		{
			var c = this.getPropStoreFieldValue('size3D');
			var result = (c) && ((typeof(c.x) !== 'undefined') || (typeof(c.y) !== 'undefined') || (typeof(c.z) !== 'undefined'));
			if ((!result) && allowSizeBorrow)
				result = this.hasSize2D? this.hasSize2D(): false;
			return result;
		},
		/**
		 * Returns a min 3D box containing this object.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Hash}
		 */
		getBox3D: function(allowCoordBorrow)
		{
			var coord1 = this.getCoord3D(allowCoordBorrow);
			var size = this.getSize3D(allowCoordBorrow);
			if (coord1 && size)
			{
				var coord2 = Kekule.CoordUtils.add(coord1, size);
				return {'x1': coord1.x, 'y1': coord1.y, 'z1': coord1.z, 'x2': coord2.x, 'y2': coord2.y, 'z2': coord2.z};
			}
		},
		/**
		 * Get x (width) value of size3D property.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Float} x
		 */
		get3DSizeX: function(allowSizeBorrow)
		{
			var c = this.getSize3D(allowSizeBorrow);
			return c? c.x || 0: 0;
		},
		/**
		 * Change x (width) value of size3D property.
		 * @param {Float} x
		 */
		set3DSizeX: function(x)
		{
			var c = fetchSize3D();
			if (c.x != x)
			{
				c.x = x;
				notifySize3DChanged(c);
			}
		},
		/**
		 * Get y (height) value of size3D property.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Float} y
		 */
		get3DSizeY: function(allowSizeBorrow)
		{
			var c = this.getSize3D(allowSizeBorrow);
			return c? c.y || 0: 0;
		},
		/**
		 * Change y (height) value of size3D property.
		 * @param {Float} y
		 */
		set3DSizeY: function(y)
		{
			var c = fetchSize3D();
			if (c.y != y)
			{
				c.y = y;
				notifySize3DChanged(c);
			}
		},
		/**
		 * Get z (depth) value of size3D property.
		 * @param {Bool} allowSizeBorrow
		 * @returns {Float} z
		 */
		get3DSizeZ: function(allowSizeBorrow)
		{
			var c = this.getSize3D(allowSizeBorrow);
			return c? c.z || 0: 0;
		},
		/**
		 * Change y (height) value of size3D property.
		 * @param {Float} z
		 */
		set3DSizeZ: function(z)
		{
			var c = fetchSize3D();
			if (c.z != z)
			{
				c.z = z;
				notifySize3DChanged(c);
			}
		}
	},
	/**
	 * Define size2D/size3D related properties and methods to a class.
	 * @param {Object} aClass Should be class object.
	 * @param {Array} props Which properties should be defined. e.g. ['size2D', 'size3D'].
	 *   If not set, all 2D and 3D properties will be defined.
	 */
	addStandardSizeSupport: function(aClass, props)
	{
		ClassEx.extend(aClass, Kekule.ClassDefineUtils.CommonSizeMethods);
		if ((!props) || (props.indexOf('size2D') >= 0))
		{
			ClassEx.defineProp(aClass, 'size2D', {
				'dataType': DataType.HASH,
				// clone result object so that user can not modify x/y directly from getter
				'getter': function(allowSizeBorrow, allowCreateNew)
				{
					var c = this.getPropStoreFieldValue('size2D');
					if ((!c) && allowSizeBorrow)
					{
						if (this.hasSize3D())
						{
							c = this.getSize3D();
						}
					}

					if ((!c) && allowCreateNew)
					{
						c = {'x': 0, 'y': 0};
						this.setPropStoreFieldValue('size2D', c);
					}

					var result = c? {'x': c.x, 'y': c.y}: undefined;
					return result;
				},
				// clone value from input
				'setter': function(value)
				{
					var c = this.fetchSize2D();
					if (value.x !== undefined)
						c.x = value.x;
					if (value.y !== undefined)
						c.y = value.y;
					this.notifySize2DChanged(c);
				}
			});
			ClassEx.extend(aClass, Kekule.ClassDefineUtils.Size2DMethods);
		}
		if ((!props) || (props.indexOf('size3D') >= 0))
		{
			ClassEx.defineProp(aClass, 'size3D', {
				'dataType': DataType.HASH,
				// clone result object so that user can not modify x/y directly from getter
				'getter': function(allowSizeBorrow, allowCreateNew)
				{
					var c = this.getPropStoreFieldValue('size3D');

					if ((!c) && allowSizeBorrow)
					{
						if (this.hasSize2D())
						{
							c = this.getSize2D();
							c.z = 0;
						}
					}

					if ((!c) && allowCreateNew)
					{
						c = {'x': 0, 'y': 0, 'z': 0};
						this.setPropStoreFieldValue('size3D', c);
					}

					var result = c? {'x': c.x, 'y': c.y, 'z': c.z}: undefined;
					return result;
				},
				// clone value from input
				'setter': function(value){
					var c = this.fetchSize3D();
					if (value.x !== undefined)
						c.x = value.x;
					if (value.y !== undefined)
						c.y = value.y;
					if (value.z !== undefined)
						c.z = value.z;
					this.notifySize3DChanged(c);
				}
			});
			ClassEx.extend(aClass, Kekule.ClassDefineUtils.Size3DMethods);
		}
	},

	/// Methods to expand support for Coord2D and Coord3D property
	/**
	 * @class
	 * @private
	 */
	CommonCoordMethods:
	/** @lends Kekule.ClassDefineUtils.CommonCoordMethods# */
	{
		/**
		 * Get coordinate of specified mode.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 * @param {Bool} allowCoordBorrow If corresponding coord of 2D/3D not found, whether
		 *   coord of another mode can be used instead.
		 *   If true, 2D coord can be expanded to 3D one as {x, y, 0} and 3D
		 *   reducts to 2D one as {x, y}.
		 * @returns {Hash}
		 */
		getCoordOfMode: function(coordMode, allowCoordBorrow)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.getCoord3D(allowCoordBorrow);
			else
				return this.getCoord2D(allowCoordBorrow);
		},
		/**
		 * Set coordinate of specified mode.
		 * @param {Hash} value Value of coordinate. {x, y} or {x, y, z}.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 */
		setCoordOfMode: function(value, coordMode)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.setCoord3D(value);
			else
				return this.setCoord2D(value);
		},
		/**
		 * Get absolute coordinate of specified mode.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Hash}
		 */
		getAbsCoordOfMode: function(coordMode, allowCoordBorrow)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.getAbsCoord3D(allowCoordBorrow);
			else
				return this.getAbsCoord2D(allowCoordBorrow);
		},
		/**
		 * Set absolute coordinate of specified mode.
		 * @param {Hash} value Value of coordinate. {x, y} or {x, y, z}.
		 * @param {Int} coordMode Value from {@link Kekule.CoordMode}, mode of coordinate.
		 */
		setAbsCoordOfMode: function(value, coordMode)
		{
			if (coordMode === Kekule.CoordMode.COORD3D)
				return this.setAbsCoord3D(value);
			else
				return this.setAbsCoord2D(value);
		}
	},
	/**
	 * @class
	 * @private
	 */
	Coord2DMethods:
	/** @lends Kekule.ClassDefineUtils.Coord2DMethods# */
	{
		/*
		 * Get coord2D property, if this property is null, then create new hash for it.
		 * Note this method will return a direct instance of coord2D hash (instead of a
		 * clone as in getCoord2D).
		 * //@param {Bool} allowCoordBorrow
		 * @returns {Hash} {x, y}
		 */
		fetchCoord2D: function(/*allowCoordBorrow*/)
		{
			var c = this.getPropStoreFieldValue('coord2D');
			if (!c)
			{
				c = {};
				this.setPropStoreFieldValue('coord2D', c);
			}
			return c;
			/*
			 console.log('fetch2D');
			 var result = this.getCoord2D(allowCoordBorrow, true);  // allow create
			 console.log(result);
			 return result;
			 */
		},
		/** @private */
		notifyCoord2DChanged: function(newValue)
		{
			this.notifyPropSet('coord2D', newValue);
		},
		/**
		 * Check if this node has a 2D coordinate.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Bool}
		 */
		hasCoord2D: function(allowCoordBorrow)
		{
			var c = this.getPropStoreFieldValue('coord2D');  //this.getCoord2D();
			var result = (c) && ((typeof(c.x) != 'undefined') || (typeof(c.y) != 'undefined'));
			if ((!result) && allowCoordBorrow)
				result = this.hasCoord3D? this.hasCoord3D(): false;
			return result;
		},
		/**
		 * Get x coordinate of coord2D property.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Float} x
		 */
		get2DX: function(allowCoordBorrow)
		{
			var c = this.getCoord2D(allowCoordBorrow);
			return c? c.x || 0: 0;
			//return this.hasCoord2D()? this.getCoord2D().x || 0: 0;
		},
		/**
		 * Change x coordinate of coord2D property.
		 * @param {Float} x
		 */
		set2DX: function(x)
		{
			var c = fetchCoord2D();
			if (c.x != x)
			{
				c.x = x;
				notifyCoord2DChanged(c);
			}
		},
		/**
		 * Get y coordinate of coord2D property.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Float} y
		 */
		get2DY: function(allowCoordBorrow)
		{
			//return this.hasCoord2D()? this.getCoord2D().y || 0: 0;
			var c = this.getCoord2D(allowCoordBorrow);
			return c? c.y || 0: 0;
		},
		/**
		 * Change y coordinate of coord2D property.
		 * @param {Float} y
		 */
		set2DY: function(y)
		{
			var c = fetchCoord2D();
			if (c.y != y)
			{
				c.y = y;
				notifyCoord2DChanged(c);
			}
		}
	},
	/**
	 * @class
	 * @private
	 */
	Coord3DMethods:
	/** @lends Kekule.ClassDefineUtils.Coord3DMethods# */
	{
		/*
		 * Get coord3D property, if this property is null, then create new hash for it.
		 * Note this method will return a direct instance of coord2D hash (instead of a
		 * clone as in getCoord3D).
		 * //@param {Bool} allowCoordBorrow
		 * @returns {Hash} {x, y, z}
		 */
		fetchCoord3D: function(/*allowCoordBorrow*/)
		{
			var c = this.getPropStoreFieldValue('coord3D');
			if (!c)
			{
				c = {};
				this.setPropStoreFieldValue('coord3D', c);
			}
			return c;
			//return this.getCoord3D(allowCoordBorrow, true);  // allow create
		},
		/** @private */
		notifyCoord3DChanged: function(newValue)
		{
			this.notifyPropSet('coord3D', newValue);
		},
		/**
		 * Check if this node has a 3D coordinate.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Bool}
		 */
		hasCoord3D: function(allowCoordBorrow)
		{
			var c = this.getPropStoreFieldValue('coord3D');  //this.getCoord3D();
			var result = (c) && ((typeof(c.x) != 'undefined') || (typeof(c.y) != 'undefined') || (typeof(c.z) != 'undefined'));
			if ((!result) && allowCoordBorrow)
				result = this.hasCoord2D? this.hasCoord2D(): false;
			return result;
		},
		/**
		 * Get x coordinate of coord3D property.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Float} x
		 */
		get3DX: function(allowCoordBorrow)
		{
			//return this.hasCoord3D()? this.getCoord3D().x || 0: 0;
			var c = this.getCoord3D(allowCoordBorrow);
			return c? c.x || 0: 0;
		},
		/**
		 * Change x coordinate of coord3D property.
		 * @param {Float} x
		 */
		set3DX: function(x)
		{
			var c = fetchCoord3D();
			if (c.x != x)
			{
				c.x = x;
				notifyCoord3DChanged(c);
			}
		},
		/**
		 * Get y coordinate of coord3D property.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Float} y
		 */
		get3DY: function(allowCoordBorrow)
		{
			//return this.hasCoord3D()? this.getCoord3D().y || 0: 0;
			var c = this.getCoord3D(allowCoordBorrow);
			return c? c.y || 0: 0;
		},
		/**
		 * Change y coordinate of coord3D property.
		 * @param {Float} y
		 */
		set3DY: function(y)
		{
			var c = fetchCoord3D();
			if (c.y != y)
			{
				c.y = y;
				notifyCoord3DChanged(c);
			}
		},
		/**
		 * Get z coordinate of coord3D property.
		 * @param {Bool} allowCoordBorrow
		 * @returns {Float} z
		 */
		get3DZ: function(allowCoordBorrow)
		{
			//return this.hasCoord3D()? this.getCoord3D().z || 0: 0;
			var c = this.getCoord3D(allowCoordBorrow);
			return c? c.z || 0: 0;
		},
		/**
		 * Change z coordinate of coord3D property.
		 * @param {Float} z
		 */
		set3DZ: function(z)
		{
			var c = fetchCoord3D();
			if (c.z != z)
			{
				c.z = z;
				notifyCoord3DChanged(c);
			}
		}
	},
	/**
	 * Define coord2D/coord3D related properties and methods to a class.
	 * @param {Object} aClass Should be class object.
	 * @param {Array} props Which properties should be defined. e.g. ['coord3D', 'absCoord3D'].
	 *   If not set, all 2D and 3D properties will be defined.
	 */
	addStandardCoordSupport: function(aClass, props)
	{
		ClassEx.extend(aClass, Kekule.ClassDefineUtils.CommonCoordMethods);
		if ((!props) || (props.indexOf('coord2D') >= 0))
		{
			ClassEx.defineProp(aClass, 'coord2D', {
				'dataType': DataType.HASH,
				// clone result object so that user can not modify x/y directly from getter
				'getter': function(allowCoordBorrow, allowCreateNew)
				{
					var c = this.getPropStoreFieldValue('coord2D');
					if ((!c) && allowCoordBorrow)
					{
						if (this.hasCoord3D())
						{
							c = this.getCoord3D();
						}
					}

					if ((!c) && allowCreateNew)
					{
						c = {'x': 0, 'y': 0};
						this.setPropStoreFieldValue('coord2D', c);
					}

					var result = c? {'x': c.x, 'y': c.y}: undefined;
					return result;

					/*
					 if (!this.hasCoord2D())
					 {
					 return undefined;
					 }
					 var c = this.getPropStoreFieldValue('coord2D');
					 if ((!c) && allowCreateNew)
					 this.setPropStoreFieldValue('coord2D', {});
					 var r = {};
					 r = Object.extend(r, c);
					 return r;
					 */
				},
				// clone value from input
				'setter': function(value)
				{
					var c = this.fetchCoord2D();
					if (value.x !== undefined)
						c.x = value.x;
					if (value.y !== undefined)
						c.y = value.y;
					this.notifyCoord2DChanged(c);
				}
			});
			ClassEx.extend(aClass, Kekule.ClassDefineUtils.Coord2DMethods);
		}
		if ((!props) || (props.indexOf('coord3D') >= 0))
		{
			ClassEx.defineProp(aClass, 'coord3D', {
				'dataType': DataType.HASH,
				// clone result object so that user can not modify x/y directly from getter
				'getter': function(allowCoordBorrow, allowCreateNew)
				{
					var c = this.getPropStoreFieldValue('coord3D');

					if ((!c) && allowCoordBorrow)
					{
						if (this.hasCoord2D())
						{
							c = this.getCoord2D();
							c.z = 0;
						}
					}

					if ((!c) && allowCreateNew)
					{
						c = {'x': 0, 'y': 0, 'z': 0};
						this.setPropStoreFieldValue('coord3D', c);
					}

					var result = c? {'x': c.x, 'y': c.y, 'z': c.z}: undefined;
					return result;
					/*
					 if (!this.hasCoord3D())
					 return undefined;
					 var c = this.getPropStoreFieldValue('coord3D');
					 if ((!c) && allowCreateNew)
					 this.setPropStoreFieldValue('coord2D', {});
					 var r = {};
					 r = Object.extend(r, c);
					 return r;
					 */
				},
				// clone value from input
				'setter': function(value){
					var c = this.fetchCoord3D();
					if (value.x !== undefined)
						c.x = value.x;
					if (value.y !== undefined)
						c.y = value.y;
					if (value.z !== undefined)
						c.z = value.z;
					this.notifyCoord3DChanged(c);
				}
			});
			ClassEx.extend(aClass, Kekule.ClassDefineUtils.Coord3DMethods);
		}
		if ((!props) || (props.indexOf('absCoord2D') >= 0))
		{
			ClassEx.defineProp(aClass, 'absCoord2D', {
				'dataType': DataType.HASH,
				'serializable': false,
				'getter': function(allowCoordBorrow){
					var c = this.getCoord2D(allowCoordBorrow) || {};
					var p = this.getParent? this.getParent(): null;
					var result;
					//if (p && p.hasCoord2D && p.hasCoord2D())  // has parent, consider parent coordinate to get absolute position
					if (p && p.getAbsCoord2D)
					{
						return Kekule.CoordUtils.add(c, p.getAbsCoord2D(allowCoordBorrow) || {});
					}
					else
						return Object.extend({}, c);
				},
				'setter': function(value){
					var c = value;
					if (this.getParent && this.getParent() && this.getParent().getAbsCoord2D) // has parent, consider parent coordinate to get absolute position
						c = Kekule.CoordUtils.substract(value, this.getParent().getAbsCoord2D());
					this.setCoord2D(c);
				}
			});
		}
		if ((!props) || (props.indexOf('absCoord3D') >= 0))
		{
			ClassEx.defineProp(aClass, 'absCoord3D', {
				'dataType': DataType.HASH,
				'serializable': false,
				'getter': function(allowCoordBorrow){
					var c = this.getCoord3D(allowCoordBorrow) || {};
					var p = this.getParent? this.getParent(): null;
					//if (p && p.hasCoord3D && p.hasCoord3D())  // has parent, consider parent coordinate to get absolute position
					if (p && p.getAbsCoord3D)
						return Kekule.CoordUtils.add(c, p.getAbsCoord3D(allowCoordBorrow) || {});
					else
						return Object.extend({}, c);
				},
				'setter': function(value){
					var c = value;
					if (this.getParent && this.getParent()) // has parent, consider parent coordinate to get absolute position
						c = Kekule.CoordUtils.substract(value, this.getParent().getAbsCoord3D());
					this.setCoord3D(c);
				}
			});
		}
	},


	/// Methods to expand support for ExtraObjMap
	/**
	 * @class
	 * @private
	 */
	ExtraObjMapMethods: {
		/**
		 * Get extra mapped property of obj.
		 * @param {Object} obj
		 * @param {String} propName
		 * @returns {Variant} If propName is set, returns the prop value. Otherwise return a hash contains all extra properties.
		 * @private
		 */
		getExtraProp: function(obj, propName)
		{
			var info = this.getExtraObjMap().get(obj);
			if (info)
				return propName? info[propName]: info;
			else
				return undefined;
		},
		/**
		 * Set extra mapped property of obj.
		 * @param {Object} obj
		 * @param {String} propName
		 * @param {Variant} propValue
		 * @private
		 */
		setExtraProp: function(obj, propName, propValue)
		{
			var info = this.getExtraProp(obj);
			if (info)
				info[propName] = propValue;
			else
			{
				var info = {};
				info[propName] = propValue;
				this.getExtraObjMap().set(obj, info);
			}
		},
		/**
		 * Remove extra mapped property of obj.
		 * @param {Object} obj
		 * @param {String} propName If not set, all properties on obj will be removed.
		 * @private
		 */
		removeExtraProp: function(obj, propName)
		{
			if (propName)
			{
				var info = this.getExtraProp(obj);
				info[propName] = undefined;
				delete info[propName];
			}
			else
				this.getExtraObjMap().remove(obj);
		}
	},

	/**
	 * Define extraObjMap related properties and methods to a class.
	 * @param {Object} aClass Should be class object.
	 */
	addExtraObjMapSupport: function(aClass)
	{
		var	mapName = 'extraObjMap';
		ClassEx.defineProp(aClass, mapName, {
			'dataType': 'Kekule.MapEx', 'serializable': false,
			'getter': function()
			{
				var result = this.getPropStoreFieldValue(mapName);
				if (!result)
				{
					result = new Kekule.MapEx(true);
					this.setPropStoreFieldValue(mapName, result);
				}
				return result;
			}
		});
		ClassEx.extend(aClass, Kekule.ClassDefineUtils.ExtraObjMapMethods);
	},

	/**
	 * @class
	 * @private
	 */
	ExtraTwoTupleObjMapMethods: {
		/**
		 * Get extra mapped property of obj.
		 * @param {Object} obj1
		 * @param {Object} obj2
		 * @param {String} propName
		 * @returns {Variant} If propName is set, returns the prop value. Otherwise return a hash contains all extra properties.
		 * @private
		 */
		getExtraProp2: function(obj1, obj2, propName)
		{
			var info = this.getExtraTwoTupleObjMap().get(obj1, obj2);
			if (info)
				return propName? info[propName]: info;
			else
				return undefined;
		},
		/**
		 * Set extra mapped property of obj.
		 * @param {Object} obj1
		 * @param {Object} obj2
		 * @param {String} propName
		 * @param {Variant} propValue
		 * @private
		 */
		setExtraProp2: function(obj1, obj2, propName, propValue)
		{
			var info = this.getExtraProp2(obj1, obj2);
			if (info)
				info[propName] = propValue;
			else
			{
				var info = {};
				info[propName] = propValue;
				this.getExtraTwoTupleObjMap().set(obj1, obj2, info);
			}
		},
		/**
		 * Remove extra mapped property of obj.
		 * @param {Object} obj1
		 * @param {Object} obj2
		 * @param {String} propName If not set, all properties on obj will be removed.
		 * @private
		 */
		removeExtraProp2: function(obj1, obj2, propName)
		{
			if (propName)
			{
				var info = this.getExtraProp2(obj1, obj2);
				info[propName] = undefined;
				delete info[propName];
			}
			else
				this.getExtraTwoTupleObjMap().remove(obj1, obj2);
		}
	},
	addExtraTwoTupleObjMapSupport: function(aClass)
	{
		var	mapName = 'extraTwoTupleObjMap';
		ClassEx.defineProp(aClass, mapName, {
			'dataType': 'Kekule.TwoTupleMapEx', 'serializable': false,
			'getter': function()
			{
				var result = this.getPropStoreFieldValue(mapName);
				if (!result)
				{
					result = new Kekule.TwoTupleMapEx(true);
					this.setPropStoreFieldValue(mapName, result);
				}
				return result;
			}
		});
		ClassEx.extend(aClass, Kekule.ClassDefineUtils.ExtraTwoTupleObjMapMethods);
	}
};


/**
 * A manager class to store object property settings.
 * Settings is a hash with property name and values, e.g.:
 *   {'id': 'object1', 'enabled': false}.
 * Those settings can be applied to instance of {@link Kekule.ChemObject}
 * by {@link Kekule.ChemObject.predefinedSetting} property.
 * Settings can be get out by settingName which is recommended to have name like 'Kekule.ChemObject.Setting1'.
 * Name of object class should be used as a prefix. Then user can use code chemObject.setPredefinedSetting('Setting1')
 * to set settings.
 * @class
 */
Kekule.ObjPropSettingManager = {
	/** @private */
	_items: new Kekule.MapEx(true),
	register: function(name, settings)
	{
		Kekule.ObjPropSettingManager._items.set(name, settings);
	},
	unregister: function(name)
	{
		Kekule.ObjPropSettingManager._items.remove(name);
	},
	getSetting: function(name)
	{
		return Kekule.ObjPropSettingManager._items.get(name);
	}
};

// predefinedSetting string can be split by ',', each setting will be applied to object one by one
ClassEx.defineProp(ObjectEx, 'predefinedSetting', {'dataType': DataType.STRING,
	'scope': Class.PropertyScope.PUBLIC,
	'setter': function(value)
	{
		var vs = Kekule.StrUtils.splitTokens(value || '', ',');
		//console.log('predefine', this.getClassName(), vs);

		if (vs.length)
		{
			for (var i = 0, l = vs.length; i < l; ++i)
			{
				var currClass = this.getClass();
				var v = vs[i];
				var setting = null;
				var sname = '';
				while (currClass && !setting)
				{
					var cname = ClassEx.getClassName(currClass);
					var sname = cname + '.' + v;
					var setting = Kekule.ObjPropSettingManager.getSetting(sname);
					currClass = ClassEx.getSuperClass(currClass);
				}

				if (!setting)
				{
					setting = Kekule.ObjPropSettingManager.getSetting(v);
					//sname = v;
				}
				if (setting)
				{
					this.setPropValues(setting);
				}
			}
			this.setPropStoreFieldValue('predefinedSetting', sname);
		}
	}
});

/**
 * Enumeration of interaction types of chem objects in editor.
 * @class
 */
Kekule.ChemObjInteractMode = {
	/* A default object, can be selected and moved. */
	DEFAULT: 0,
	/** A uninteractive object */
	HIDDEN: -1
};

/**
 * Root class for all object related to chemistry in Kekule library.
 * @class
 * @augments ObjectEx
 * @param {String} id Id of this object.
 * @property {String} id Id of this object. Can be set by users.
 * @property {Int} interactMode Value from {@link Kekule.ChemObjInteractMode}.
 * //@property {String} iid Internal ID of object, when an instance is created, an unique iid will be
 * //  set automatically. This value is helpful to find a special object in molecule or chem space.
 * //  User should not set or modify this value.
 * @property {Kekule.ChemSpace} owner Owner of this object. Can be null.
 * @property {Array} scalarAttribs Scalar attributes about this object. Each item should be {@link Kekule.Scalar}.
 * @property {Hash} info Additional information of object, for example:
 *   {
 *     title: 'Object Title',
 *     author: 'Author Name'
 *   }
 * @property {Kekule.ChemObject} parent Direct parent object.
 * @property {Kekule.ChemObject} owner
 * @property {Object} srcInfo Stores the source data of ChemObject when read object from external file, a object that
 *   can has the following fields: {data, dataType, format, mimeType, fileExt, possibleFileExts, url}.
 */
Kekule.ChemObject = Class.create(ObjectEx,
/** @lends Kekule.ChemObject# */
{
	/** @private */
	CLASS_NAME: 'Kekule.ChemObject',
	/** @constructs */
	initialize: function($super, id)
	{
		$super();
		if (id)
			this.setId(id);
		this.setBubbleEvent(true);  // allow event bubble

		// react on change (both on self and children)
		// when object is modified,clear srcInfo information
		/*
		this.addEventListener('change', function(e)
		{
			var srcInfo = this.getPropStoreFieldValue('srcInfo');
			if (srcInfo)
			{
				var target = e.target;
				var propNames = e.changedPropNames;
				var clearSrcInfo = false;
				for (var i = 0, l = propNames.length; i < l; ++i)
				{
					var name = propNames[i];
					if (name !== 'srcInfo' && target.isPropertySerializable(name))
					{
						clearSrcInfo = true;
						break;
					}
				}
				if (clearSrcInfo)
				{
					this.setPropStoreFieldValue('srcInfo', undefined);
					console.log('clear src info', propNames);
				}
			}
		}, this);
		*/
	},
	/** @private */
	doFinalize: function($super)
	{
		/*
		this.setParent(null);
		this.setOwner(null);
		*/
		this.removeSelf();
		$super();
	},
	/** @private */
	initProperties: function()
	{
		this.defineProp('id', {'dataType': DataType.STRING});
		this.defineProp('interactMode', {'dataType': DataType.INT});
		/*
		this.defineProp('iid', {
			'dataType': DataType.STRING, 'scope': Class.PropertyScope.PRIVATE
		});
		*/
		this.defineProp('info',
			{
				'dataType': DataType.HASH,
				'getter': function(canCreate)
				{
					var r = this.getPropStoreFieldValue('info');
					if ((!r) && canCreate)
					{
						r = {};
						this.setPropStoreFieldValue('info', r);
					}
					return r;
				}
			});
		this.defineProp('scalarAttribs', {
			'dataType': DataType.ARRAY,
			'setter': null
		});
		this.defineProp('parent', {'dataType': 'Kekule.ChemObject', 'serializable': false, 'scope': Class.PropertyScope.PUBLIC,
			'setter': function(value)
				{
					var oldParent = this.getParent();
					if (oldParent === value)
						return;
					if (oldParent && oldParent._removeChildObj)  // remove from old parent
					{
						oldParent._removeChildObj(this);
					}
					this.setPropStoreFieldValue('parent', value);
					if (value && value._appendChildObj)  // add to new parent
					{
						value._appendChildObj(this);
					}
					this.parentChanged(value);
				}
		});
		this.defineProp('owner', {
			'dataType': 'Kekule.ChemSpace',
			'serializable': false,
			'scope': Class.PropertyScope.PUBLIC,
			'setter': function(value)
				{
					var oldOwner = this.getOwner();
					if (oldOwner === value)
						return;
					if (oldOwner)
						oldOwner._removeOwnedObj(this);
					this.setPropStoreFieldValue('owner', value);
					if (value)
						value._appendOwnedObj(this);
					this.ownerChanged(value);
				}
		});
		this.defineProp('srcInfo', {'dataType': DataType.OBJECT,
			'serializable': false,  // not allowed to assign from objects and save to stream
			'scope': Class.PropertyScope.PUBLISHED,
			'getter': function()
			{
				var result = this.getPropStoreFieldValue('srcInfo');
				if (!result)
				{
					result = {};
					this.setPropStoreFieldValue('srcInfo', result);
				}
				return result;
			}
		});
	},

	/** @private */
	getHigherLevelObj: function()
	{
		return this.getParent() || this.getOwner();
	},

	/**
	 * Return a prefix to automatically generate id of chem object.
	 * Descendants should override this method.
	 * @returns {String}
	 * @private
	 */
	getAutoIdPrefix: function()
	{
		return 'o';
	},
	/**
	 * Check whether this object can be selected in editor.
	 */
	isSelectable: function()
	{
		return this.getInteractMode() !== Kekule.ChemObjInteractMode.HIDDEN;
	},
	/**
	 * Returns nearest selectable chem object.
	 * Usually this method will return this object, but if this object is not selectable,
	 * parent object will be returned instead.
	 * @returns {Kekule.ChemObject}
	 */
	getNearestSelectableObject: function()
	{
		return this.isSelectable()? this:
			this.getParent()? this.getParent().getNearestSelectableObject():
			null;
	},

	/**
	 * Remove current object away from parent and owner.
	 */
	removeSelf: function()
	{
		this.setParent(null);
		this.setOwner(null);
	},

	/** @private */
	notifyScalarAttribsChange: function()
	{
		this.notifyPropSet('scalarAttribs', this.getPropStoreFieldValue('scalarAttribs'));
	},
	/** @private */
	notifyInfoChange: function()
	{
		this.notifyPropSet('info', this.getPropStoreFieldValue('info'));
	},

	/**
	 * Called after a new owner property is set. Descendants can override this method.
	 * @private
	 */
	ownerChanged: function(newOwner)
	{
		// change scalar owners
		for (var i = 0, l = this.getScalarAttribCount(); i < l; ++i)
			this.getScalarAttribAt(i).setOwner(newOwner);
	},
	/**
	 * Called after a new parent property is set. Descendants can override this method.
	 * @private
	 */
	parentChanged: function(newParent)
	{
		// do nothing here
	},

	/**
	 * Check if this object is a child (direct or indirect) of another object.
	 * @param obj
	 */
	isChildOf: function(obj)
	{
		var p = this.getParent();
		while (p && (p !== obj))
			p = p.getParent? p.getParent(): null;
		return (!!p);
	},
	/**
	 * Returns next sibling object in parent.
	 * If parent not set, null will be returned.
	 * @returns {Object}
	 */
	getNextSibling: function()
	{
		var parent = this.getParent();
		if (parent && parent.getNextSiblingOfChild)
		{
			return parent.getNextSiblingOfChild(this);
		}
		else
			return null;
	},

	/**
	 * Get count of child objects.
	 * To a simple chem object without any child, this method will always return 0.
	 * Descendants need to override this method if they has children.
	 * @returns {Int}
	 */
	getChildCount: function()
	{
		return 0;
	},
	/**
	 * Get child object at index.
	 * To a simple chem object without any child, this method will always return null.
	 * Descendants need to override this method if they has children.
	 * @param {Int} index
	 * @returns {Variant}
	 */
	getChildAt: function(index)
	{
		return null;
	},
	/**
	 * Get the index of obj in children list.
	 * To a simple chem object without any child, this method will always return -1.
	 * Descendants need to override this method if they has children.
	 * @param {Variant} obj
	 * @returns {Int} Index of obj or -1 when not found.
	 */
	indexOfChild: function(obj)
	{
		return -1;
	},

	/**
	 * Check if this object contains no data.
	 * @returns {Bool}
	 */
	isEmpty: function()
	{
		//return (this.getScalarAttribCount() <= 0) && (this.getInfoKeys().length <= 0);
		return false;  // usually chem object always contains information.
	},

	/**
	 * Set id property to null on this object and all its children.
	 */
	clearIds: function()
	{
		this.setId(null);
		for (var i = 0, l = this.getChildCount(); i < l; ++i)
		{
			var child = this.getChildAt(i);
			if (child.clearIds)
				child.clearIds();
		}
	},

	/**
	 * Assign data in this object to targetObj.
	 * @param {ObjectEx} targetObj
	 * @param {Bool} withId If set to true, id of current object will be copied to targetObj,
	 *   otherwise targetObj's id will be cleared.
	 */
	assignTo: function($super, targetObj, withId)
	{
		var result = $super(targetObj);
		if (!withId && targetObj.clearIds)
			targetObj.clearIds();
		return result;
	},
	/**
	 * Assign data in srcObj to this object.
	 * @param {ObjectEx} srcObj
	 * @param {Bool} withId If set to true, id of srcObj will be copied to this object,
	 *   otherwise this object's id will be cleared.
	 */
	assign: function(srcObj, withId)
	{
		return srcObj.assignTo(this, withId);
	},
	/**
	 * Returns a cloned object.
	 * @param {Bool} withId If set to true, id of this object will cloned to new object,
	 *   otherwise id of new object will be cleared.
	 * @returns {Kekule.ChemObject}
	 */
	clone: function(withId)
	{
		var classObj = this.getClass();
		var result = new classObj();
		this.assignTo(result, withId);
		return result;
	},

	/**
	 * Get count of scalar attributes.
	 * @returns {Int}
	 */
	getScalarAttribCount: function()
	{
		var a = this.getScalarAttribs();
		return a? a.length: 0;
	},
	/**
	 * Get scalar attrib object at index.
	 * @param {Int} index
	 * @returns {Kekule.Scalar}
	 */
	getScalarAttribAt: function(index)
	{
		var a = this.getScalarAttribs();
		return a? a[index]: null;
	},
	/**
	 * Append a scalar object to scalarAttribs array.
	 * @param {Kekule.Scalar} scalar
	 */
	appendScalarAttrib: function(scalar)
	{
		if (!this.getScalarAttribs())
			this.setPropStoreFieldValue('scalarAttribs', []);
		var r = Kekule.ArrayUtils.pushUniqueEx(this.getScalarAttribs(), scalar);
		if (r.isPushed)
		{
			scalar.setParent(this);
			this.notifyScalarAttribsChange();
		}
		return r.index;
	},
	/**
	 * Remove scalar at index in scalarAttribs array.
	 * @param {Int} index
	 * @returns {Kekule.Scalar} Object removed or null.
	 */
	removeScalarAttribAt: function(index)
	{
		if (!this.getScalarAttribs())
			return null;
		else
		{
			var r = Kekule.ArrayUtils.removeAt(this.getScalarAttribs(), index);
			if (r)
			{
				r.setParent(null);
				this.notifyScalarAttribsChange();
			}
			return r;
		}
	},
	/**
	 * Remove scalar in scalarAttribs array.
	 * @param {Kekule.Scalar} scalar Object to be removed.
	 * @returns {Kekule.Scalar} Object removed or null.
	 */
	removeScalarAttrib: function(scalar)
	{
		if (!this.getScalarAttribs())
			return null;
		else
		{
			var r = Kekule.ArrayUtils.remove(this.getScalarAttribs(), scalar);
			if (r)
			{
				r.setParent(null);
				this.notifyScalarAttribsChange();
			}
			return r;
		}
	},
	/**
	 * Returns all keys in {@link Kekule.ChemObject#info} property.
	 * @returns {Array}
	 */
	getInfoKeys: function()
	{
		return this.getInfo()? Kekule.ObjUtils.getOwnedFieldNames(this.getInfo()): [];
	},
	/**
	 * Get item value from info hash.
	 * @param key Key of information item.
	 */
	getInfoValue: function(key)
	{
		return this.getInfo()? this.getInfo()[key]: null;
	},
	/**
	 * Set an item value in info hash. If key already exists, its value will be overwritten.
	 * @param key Key of information item.
	 * @param value Value of information item.
	 */
	setInfoValue: function(key, value)
	{
		this.doGetInfo(true)[key] = value;
		this.notifyInfoChange();
	}
});

/**
 * Class to hold a general data with unit in chemistry, such as temperature, weight, pressure and so on.
 * @class
 * @augments Kekule.ChemObject
 * @param {id} id Id of this object.
 * @param {String} name Name of scalar value.
 * @param {Variant} value Value of scalar. Should be primary type (string, number).
 * @param {String} unit Unit of scalar.
 *
 * @property {String} name Name of scalar value.
 * @property {Variant} value Value of scalar. Should be primary type (string, number).
 * @property {Variant} errorValue Error value of scalar. Should be the same type with value.
 * @property {String} unit Unit of scalar.
 * @property {String} title Informative title of scalar value.
 */
Kekule.Scalar = Class.create(Kekule.ChemObject,
/** @lends Kekule.Scalar# */
{
	/** @private */
	CLASS_NAME: 'Kekule.Scalar',
	/** @private */
	initialize: function($super, id, name, value, unit)
	{
		$super(id);
		if (name)
			this.setName(name);
		if (typeof(value) !== 'undefined')
			this.setValue(value);
		if (unit)
			this.setUnit(unit);
	},
	initProperties: function()
	{
		this.defineProp('name', {'dataType': DataType.STRING});
		this.defineProp('value', {'dataType': DataType.PRIMARY});
		this.defineProp('errorValue', {'dataType': DataType.PRIMARY});
		this.defineProp('unit', {'dataType': DataType.STRING});
		this.defineProp('title', {'dataType': DataType.STRING});
	}
});

/**
 * A list to hold a set of other {@link Kekule.ChemObject}.
 * @class
 * @augments Kekule.ChemObject
 * @param {String} id Id of this object.
 * @param {Class} itemBaseClass Base class of each item in list.
 *   If this value is null, any type of object can be inserted into list.
 *
 * @property {Class} itemBaseClass Base class of each item in list.
 *   If this value is null, any type of object can be inserted into list.
 * @property {Array} items Items in list. All items owner is the same as the owner of list.
 */
Kekule.ChemObjList = Class.create(Kekule.ChemObject,
/** @lends Kekule.ChemObjList# */
{
	/** @private */
	CLASS_NAME: 'Kekule.ChemObjList',
	/** @constructs */
	initialize: function($super, id, itemBaseClass)
	{
		$super(id);
		this.setPropStoreFieldValue('itemBaseClass', itemBaseClass);
	},
	/** @private */
	initProperties: function()
	{
		this.defineProp('itemBaseClass', {'dataType': DataType.CLASS, 'serializable': false, 'scope': Class.PropertyScope.PUBLIC});
		this.defineProp('items', {
			'dataType': DataType.ARRAY,
			'scope': Class.PropertyScope.PUBLIC,
			'setter': null,
			'getter': function(canCreate)
				{
					var r = this.getPropStoreFieldValue('items');
					if ((!r) && canCreate)
					{
						r = [];
						this.setPropStoreFieldValue('items', r);
					}
					return r;
				}
		});
	},

	/** @private */
	loaded: function($super)
	{
		// update parent and owner of children
		this.ownerChanged(this.getOwner());
		this.parentChanged(this.getParent());
	},

	/** @private */
	ownerChanged: function($super, newOwner)
	{
		this.changeAllItemsOwner();
		$super(newOwner);
	},
	/** @private */
	parentChanged: function($super, newParent)
	{
		this.changeAllItemsParent();
		$super(newParent);
	},

	/** @ignore */
	isEmpty: function()
	{
		//var result = $super();
		return result && (this.getItemCount() <= 0);
	},

	/** @private */
	checkItemType: function(item)
	{
		var c = this.getItemBaseClass();
		var r = c? item instanceof c: true;
		if (!r)
			Kekule.raise(Kekule.$L('ErrorMsg.LIST_ITEM_CLASS_MISMATCH')/*Kekule.ErrorMsg.LIST_ITEM_CLASS_MISMATCH*/);
		return r;
	},

	/** @private */
	notifyItemsChange: function()
	{
		this.notifyPropSet('items', this.getPropStoreFieldValue('items'));
	},

	/** @private */
	getItemOwner: function()
	{
		return this.getOwner();  // || this;
	},
	/** @private */
	changeAllItemsOwner: function()
	{
		var items = this.getItems();
		if (items)
		{
			var owner = this.getItemOwner();
			for (var i = 0, l = items.length; i < l; ++i)
			{
				var obj = items[i];
				if (obj && obj.setOwner)
					obj.setOwner(owner);
			}
		}
	},
	/** @private */
	getItemParent: function()
	{
		return this.getParent() || this;
	},
	/** @private */
	changeAllItemsParent: function()
	{
		var items = this.getItems();
		if (items)
		{
			var parent = this.getItemParent();
			for (var i = 0, l = items.length; i < l; ++i)
			{
				var obj = items[i];
				if (obj && obj.setParent)
					obj.setParent(parent);
			}
		}
	},

	/**
	 * Get count of child objects.
	 * @returns {Int}
	 */
	getItemCount: function()
	{
		var a = this.getPropStoreFieldValue('items');
		return a? a.length: 0;
	},
	/**
	 * Get child object at index.
	 * @param {Int} index
	 * @returns {Variant}
	 */
	getItemAt: function(index)
	{
		var a = this.getPropStoreFieldValue('items');
		return a? a[index]: null;
	},
	/**
	 * Get the index of obj in children array.
	 * @param {Variant} obj
	 * @returns {Int} Index of obj or -1 when not found.
	 */
	indexOf: function(obj)
	{
		var a = this.getPropStoreFieldValue('items');
		return a? a.indexOf(obj): -1;
	},
	/**
	 * Returns next sibling object to childObj.
	 * @param {Object} childObj
	 * @returns {Object}
	 */
	getNextSiblingOfChild: function(childObj)
	{
		var index = this.indexOf(childObj);
		return (index >= 0)? this.getItemAt(index + 1): null;
	},
	/**
	 * Append obj to children array. If obj already inside, nothing will be done.
	 * @param {Object} obj
	 * @returns {Int} Index of obj after appending.
	 */
	append: function(obj)
	{
		this.checkItemType(obj);
		if (obj)
		{
			var r = Kekule.ArrayUtils.pushUniqueEx(this.doGetItems(true), obj);
			if (r.isPushed)
			{
				this.notifyItemsChange();
				if (obj.setOwner)
					obj.setOwner(this.getItemOwner());
				if (obj.setParent)
					obj.setParent(this.getItemParent());
			}
			return r.index;
		}
		else
			return -1;
	},
	/**
	 * Insert obj to index of children array. If obj already inside, its position will be changed.
	 * @param {Object} obj
	 * @param {Object} index
	 * @return {Int} Index of obj after inserting.
	 */
	insert: function(obj, index)
	{
		this.checkItemType(obj);
		if (obj)
		{
			var r = Kekule.ArrayUtils.insertUniqueEx(this.doGetItems(true), obj, index);
			if (r.isInserted)
			{
				this.notifyItemsChange();
				if (obj.setOwner)
					obj.setOwner(this.getItemOwner());
				if (obj.setParent)
					obj.setParent(this.getItemParent());
			}
			return r.index;
		}
		else
			return -1;
	},
	/**
	 * Insert obj before refChild in list. If refChild is null or does not exists, obj will be append to tail of list.
	 * @param {Object} obj
	 * @param {Object} refChild
	 * @return {Int} Index of obj after inserting.
	 */
	insertBefore: function(obj, refChild)
	{
		if (!refChild)
			return this.append(obj);
		else
		{
			var refIndex = this.indexOf(refChild);
			return (refIndex >= 0)? this.insert(obj, refIndex): this.append(obj);
		}
	},
	/**
	 * Remove a child at index.
	 * @param {Int} index
	 * @returns {Variant} Child object removed.
	 */
	removeAt: function(index)
	{
		if (this.getItems())
		{
			var r = Kekule.ArrayUtils.removeAt(this.getItems(), index);
			if (r)
			{
				if (r.setOwner)
					r.setOwner(null);
				if (r.setParent)
					r.setParent(null);
				this.notifyItemsChange();
			}
			return r;
		}
	},
	/**
	 * Remove obj from children array.
	 * @param {Variant} obj
	 * @returns {Variant} Child object removed.
	 */
	remove: function(obj)
	{
		if (this.getItems())
		{
			var r = Kekule.ArrayUtils.remove(this.getItems(), obj);
			if (r)
			{
				if (r.setOwner)
					r.setOwner(null);
				if (r.setParent)
					r.setParent(null);
				this.notifyItemsChange();
			}
			return r;
		}
	},
	/**
	 * Remove obj from children array. Same as method remove.
	 * @param {Variant} obj
	 * @returns {Variant} Child object removed.
	 */
	removeChild: function(obj)
	{
		return this.remove(obj);
	},

	/**
	 * Return array contains all objects in list.
	 */
	toArray: function()
	{
		return this.getItems();
	},

	/**
	 * Calculate the box to contain the objects in list.
	 * Descendants may override this method.
	 * @param {Int} coordMode Determine to calculate 2D or 3D box. Value from {@link Kekule.CoordMode}.
	 * @param {Bool} allowCoordBorrow
	 * @returns {Hash} Box information. {x1, y1, z1, x2, y2, z2} (in 2D mode z1 and z2 will not be set).
	 */
	getContainerBox: function(coordMode, allowCoordBorrow)
	{
		var result;
		var childObjs = this.toArray();
		for (var i = 0, l = childObjs.length; i < l; ++i)
		{
			var obj = childObjs[i];
			var box = obj.getContainerBox? obj.getContainerBox(coordMode, allowCoordBorrow): null;
			if (box)
			{
				if (!result)
					result = Object.extend({}, box);
				else
					result = Kekule.BoxUtils.getContainerBox(result, box);
			}
		}
		return result;
	}
});


/**
 * An element to hold a list of other chem objects or elements in chem space.
 * @class
 * @augments Kekule.ChemObject
 * @param {String} id Id of this element.
 *
 * @property {Kekule.ChemObjList} children Direct child objects in this space. The owner of children must all be this space.
 */
Kekule.ChemSpaceElement = Class.create(Kekule.ChemObject,
/** @lends Kekule.ChemSpaceElement# */
{
	/** @private */
	CLASS_NAME: 'Kekule.ChemSpaceElement',
	/** @constructs */
	initialize: function($super, id)
	{
		$super(id);
		var list = new Kekule.ChemObjList(null, Kekule.ChemObject);
		list.setParent(this);
		list.addEventListener('change', function()
			{
				this.objectChange(['children']);
			}, this);
		this.setPropStoreFieldValue('children', list);
	},
	/** @private */
	initProperties: function()
	{
		this.defineProp('children', {'dataType': 'Kekule.ChemObjList', 'scope': Class.PropertyScope.PUBLIC,
			'setter': function(value)
			{
				var old = this.getChildren();
				if (old)
				{
					old.finalize();
				}
				if (value)
				{
					value.setParent(this);
					value.setOwner(this.getOwner());
				}
				this.setPropStoreFieldValue('children', value);
			}
		});
	},

	/** @ignore */
	ownerChanged: function($super, newOwner)
	{
		// change owners of children
		this.getChildren().setOwner(newOwner);
	},
	/** @private */
	_removeChildObj: function(obj)
	{
		var index = this.indexOfChild(obj);
		if (index >= 0)
		{
			this.removeChildAt(index);
		}
	},

	/* @ignore */
	/*
	isEmpty: function($super)
	{
		var result = $super();
		return result && (this.getChildCount() <= 0);
	},
	*/

	/**
	 * Get count of child objects.
	 * @returns {Int}
	 */
	getChildCount: function()
	{
		return this.getChildren().getItemCount();
	},
	/**
	 * Get child object at index.
	 * @param {Int} index
	 * @returns {Variant}
	 */
	getChildAt: function(index)
	{
		return this.getChildren().getItemAt(index);
	},
	/**
	 * Get the index of obj in children list.
	 * @param {Variant} obj
	 * @returns {Int} Index of obj or -1 when not found.
	 */
	indexOfChild: function(obj)
	{
		return this.getChildren().indexOf(obj);
	},
	/**
	 * Returns next sibling object to childObj.
	 * @param {Object} childObj
	 * @returns {Object}
	 */
	getNextSiblingOfChild: function(childObj)
	{
		return this.getChildren().getNextSiblingOfChild(childObj);
	},
	/**
	 * Append obj to children list. If obj already inside, nothing will be done.
	 * @param {Object} obj
	 * @returns {Int} Index of obj after appending.
	 */
	appendChild: function(obj)
	{
		return this.getChildren().append(obj);
	},
	/**
	 * Insert obj to index of children list. If obj already inside, its position will be changed.
	 * @param {Object} obj
	 * @param {Object} index
	 * @return {Int} Index of obj after inserting.
	 */
	insertChild: function(obj, index)
	{
		return this.getChildren().insert(obj, index);
	},
	/**
	 * Insert obj before refChild in list. If refChild is null or does not exists, obj will be append to tail of list.
	 * @param {Object} obj
	 * @param {Object} refChild
	 * @return {Int} Index of obj after inserting.
	 */
	insertBefore: function(obj, refChild)
	{
		return this.getChildren().insertBefore(obj, refChild);
	},
	/**
	 * Remove a child at index.
	 * @param {Int} index
	 * @returns {Variant} Child object removed.
	 */
	removeChildAt: function(index)
	{
		return this.getChildren().removeChildAt(index);
	},
	/**
	 * Remove obj from children list.
	 * @param {Variant} obj
	 * @returns {Variant} Child object removed.
	 */
	removeChild: function(obj)
	{
		return this.getChildren().removeChild(obj);
	}
});

/**
 * An object to hold a set of other {@link Kekule.ChemObject}.
 * {@link Kekule.ChemObject#owner} property of each object the space should be set to this one.
 * In one space, id of each object should be unique.
 * @class
 * @augments Kekule.ChemObject
 * @param {String} id Id of this object.
 *
 * @property {Array} ownedObjs Objects owned by this space.
 * @property {Kekule.ChemSpaceElement} root The root element of space.
 * @property {Bool} enableAutoId When set to true, object inserted into space without id
 *   will be automatically assigned a id (usually a prefix plus a number, e.g. m12).
 * @property {Hash} screenSize In px, size of space on screen, {x, y}.
 * @property {Hash} size2D The 2D dimension (width, height) of glyph, {x, y}.
 * @property {Hash} size3D The 3D dimension (width, height, depth) of glyph, {x, y, z}.
 */
Kekule.ChemSpace = Class.create(Kekule.ChemObject,
/** @lends Kekule.ChemSpace# */
{
	/** @private */
	CLASS_NAME: 'Kekule.ChemSpace',
	/** @constructs */
	initialize: function($super, id)
	{
		$super(id);
		this._autoIdMap = {};  // private
		this.setPropStoreFieldValue('enableAutoId', true);
		this.setPropStoreFieldValue('ownedObjs', []);
		var root = new Kekule.ChemSpaceElement();
		this.setPropStoreFieldValue('root', root);
		root.setParent(this);
		root.setOwner(this);
	},
	/** @private */
	initProperties: function()
	{
		this.defineProp('ownedObjs', {'dataType': DataType.ARRAY, 'serializable': false, 'setter': null, 'scope': Class.PropertyScope.PUBLIC});
		this.defineProp('root', {'dataType': 'Kekule.ChemSpaceElement', 'setter': null});
		this.defineProp('enableAutoId', {'dataType': DataType.BOOL});
		this.defineProp('objScreenLengthRatio', {'dataType': DataType.FLOAT, 'serializable': false,
			'scope': Class.PropertyScope.PRIVATE
		});  // private
		this.defineProp('screenSize', {'dataType': DataType.HASH,
			'getter': function()
			{
				var o = this.getPropStoreFieldValue('screenSize') || {};
				return {'x': o.x, 'y': o.y};
			},
			'setter': function(value)
			{
				var o = this.getPropStoreFieldValue('screenSize');
				if (!o)
				{
					o = {};
					this.setPropStoreFieldValue('screenSize', o);
				}
				o.x = value.x;
				o.y = value.y;
			}
		});
	},
	/** @private */
	loaded: function($super)
	{
		$super();
		var root = this.getRoot();
		if (root)
		{
			root.setParent(this);
			root.setOwner(this);
		}
	},

	/** @private */
	notifyOwnedObjsChange: function()
	{
		this.notifyPropSet('ownedObjs', this.getPropStoreFieldValue('ownedObjs'));
	},

	/* @ignore */
	/*
	isEmpty: function($super)
	{
		var result = $super();
		return result && (this.getChildCount() <= 0) && (this.getOwnedObjCount() <= 0);
	},
	*/

	/**
	 * Returns all children of root.
	 * @returns {Array}
	 */
	getChildren: function()
	{
		return this.getRoot().getChildren().toArray();
	},
	/**
	 * Get count of child objects in root.
	 * @returns {Int}
	 */
	getChildCount: function()
	{
		return this.getRoot().getChildCount();
	},
	/**
	 * Get child object at index.
	 * @param {Int} index
	 * @returns {Variant}
	 */
	getChildAt: function(index)
	{
		return this.getRoot().getChildAt(index);
	},
	/**
	 * Get the index of obj in children list of root.
	 * @param {Variant} obj
	 * @returns {Int} Index of obj or -1 when not found.
	 */
	indexOfChild: function(obj)
	{
		return this.getRoot().indexOfChild(obj);
	},
	/**
	 * Returns next sibling object to childObj.
	 * @param {Object} childObj
	 * @returns {Object}
	 */
	getNextSiblingOfChild: function(childObj)
	{
		return this.getRoot().getNextSiblingOfChild(childObj);
	},
	/**
	 * Append obj to children list of root. If obj already inside, nothing will be done.
	 * @param {Object} obj
	 * @returns {Int} Index of obj after appending.
	 */
	appendChild: function(obj)
	{
		return this.getRoot().appendChild(obj);
	},
	/**
	 * Insert obj to index of children list of root. If obj already inside, its position will be changed.
	 * @param {Object} obj
	 * @param {Object} index
	 * @return {Int} Index of obj after inserting.
	 */
	insertChild: function(obj, index)
	{
		return this.getRoot().insertChild(obj, index);
	},
	/**
	 * Insert obj before refChild in list of root. If refChild is null or does not exists, obj will be append to tail of list.
	 * @param {Object} obj
	 * @param {Object} refChild
	 * @return {Int} Index of obj after inserting.
	 */
	insertBefore: function(obj, refChild)
	{
		return this.getRoot().insertBefore(obj, refChild);
	},
	/**
	 * Remove a child at index.
	 * @param {Int} index
	 * @returns {Variant} Child object removed.
	 */
	removeChildAt: function(index)
	{
		return this.getRoot().removeChildAt(index);
	},
	/**
	 * Remove obj from children list of root.
	 * @param {Variant} obj
	 * @returns {Variant} Child object removed.
	 */
	removeChild: function(obj)
	{
		return this.getRoot().removeChild(obj);
	},

	/**
	 * Search ownedObjs and find the one matching id.
	 * @param {String} id
	 * @returns {Kekule.ChemObject} Object found or null.
	 */
	getObjById: function(id)
	{
		for (var i = 0, l = this.getOwnedObjCount(); i < l; ++i)
		{
			var obj = this.getOwnedObjAt(i);
			if (obj.getId)
				if (obj.getId() == id)
					return obj;
		}
		return null;
	},
	/**
	 * Generate a unique id for obj.
	 * @param {Object} obj Can be null to generate a generic id.
	 * @param {Int} fromIndex Try from startIndex to get a prefix+index style id. Can be null.
	 * @returns {String} Unique id generated.
	 */
	getAutoId: function(obj, fromIndex)
	{
		var prefix;
		if (obj)
			prefix = obj.getAutoIdPrefix? obj.getAutoIdPrefix(): 'o';
		else
			prefix = 'o';

		var prefix = obj.getAutoIdPrefix? obj.getAutoIdPrefix(): 'o';
		var index;
		if (Kekule.ObjUtils.notUnset(fromIndex))
			index = fromIndex;
		else
		{
			index = this._autoIdMap[prefix] || 0;
			++index;
		}
		var index = this._getAutoIdIndex(prefix, index);
		this._autoIdMap[prefix] = index;
		return prefix + Number(index).toString();

		/*
		var start = fromIndex || 0;
		var i = start;
		var result = prefix + Number(i).toString();
		while (this.getObjById(result))  // repeat until no duplicated id
		{
			++i;
			result = prefix + Number(i).toString();
		}
		return result;
		*/
	},

	/** @private */
	_getAutoIdIndex: function(prefix, fromIndex)
	{
		var start = fromIndex || 0;
		var i = start;
		var id = prefix + Number(i).toString();
		while (this.getObjById(id))  // repeat until no duplicated id
		{
			++i;
			id = prefix + Number(i).toString();
		}
		return i;
	},

	/**
	 * Assign id automatically to a owned object.
	 * @param {Kekule.ChemObject} obj
	 * @private
	 */
	assignAutoIdToObj: function(obj)
	{
		if (obj.setId)
		{
			var id = this.getAutoId(obj);
		  obj.setId(id);
		}
	},

	/**
	 * Return count of ownedObjs.
	 * @returns {Int}
	 */
	getOwnedObjCount: function()
	{
		return this.getOwnedObjs().length;
	},
	/**
	 * Get owned object at index.
	 * @param {Int} index
	 * @returns {Kekule.ChemObject}
	 */
	getOwnedObjAt: function(index)
	{
		return this.getOwnedObjs()[index];
	},
	/**
	 * Get index of obj in ownedObjs list.
	 * @param {Object} obj
	 * @returns {Int}
	 */
	indexOfOwnedObj: function(obj)
	{
		return this.getOwnedObjs().indexOf(obj);
	},
	// Append or remove methods should not be called directly on ChemSpace.
	// You should change owner property of ChemObject instead.
	/**
	 * Add a new obj to this space. If obj already inside, do nothing.
	 * @param {Kekule.ChemObject} obj
	 * @private
	 */
	_appendOwnedObj: function(obj)
	{
		if (this.indexOfOwnedObj(obj) >= 0) // already inside, do nothing
			return;
		else
		{
			if (this.getEnableAutoId())
			{
				if (obj.getId && !obj.getId())
					this.assignAutoIdToObj(obj);
			}
			this.getOwnedObjs().push(obj);
			this.notifyOwnedObjsChange();
		}
	},
	/**
	 * Remove an ownedObj at index.
	 * @param {Int} index
	 * @private
	 */
	_removeOwnedObjAt: function(index)
	{
		var obj = this.getOwnedObjAt(index);
		if (obj)
		{
			this.getOwnedObjs().splice(index, 1);
			this.notifyOwnedObjsChange();
		}
	},
	/**
	 * Remove obj from ownerObjs list/
	 * @param {Kekule.ChemObject} obj
	 * @private
	 */
	_removeOwnedObj: function(obj)
	{
		var index = this.getOwnedObjs().indexOf(obj);
		if (index >= 0)
			this._removeOwnedObjAt(index);
	}
});
Kekule.ClassDefineUtils.addStandardSizeSupport(Kekule.ChemSpace);


/**
 * An document to hold a set of other {@link Kekule.ChemObject}, like document in HTML or XML.
 * {@link Kekule.ChemObject#owner} property of each object the space should be set to this one.
 * In one document, id of each object should be unique.
 * @class
 * @augments Kekule.ChemSpace
 * @param {String} id Id of this object.
 *
 * @property {Kekule.ChemObject} docObj Root object of document, like documentElement in HTML or XML.
 * @deprecated
 */
Kekule.ChemDocument = Class.create(Kekule.ChemSpace,
/** @lends Kekule.ChemDocument# */
{
	/** @private */
	CLASS_NAME: 'Kekule.ChemDocument',
	/** @private */
	initProperties: function()
	{
		/*
		this.defineProp('docObj', {
			'dataType': 'Kekule.ChemObject',
			'setter': function(value)
				{
					var old = this.getDocObj();
					if (old)
						old.setOwner(null);
					if (value)
						value.setOwner(this);
					this.setPropStoreFieldValue('docObj', value);
				}
		});
		*/
	}
});


})();