New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 290 insertions, 0 deletions

diff --git a/includes/js/dojox/uuid/generateTimeBasedUuid.js b/includes/js/dojox/uuid/generateTimeBasedUuid.js
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+++ b/includes/js/dojox/uuid/generateTimeBasedUuid.js
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+if(!dojo._hasResource["dojox.uuid.generateTimeBasedUuid"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.uuid.generateTimeBasedUuid"] = true;
+dojo.provide("dojox.uuid.generateTimeBasedUuid");
+
+dojox.uuid.generateTimeBasedUuid = function(/*String?*/ node){
+	// summary: 
+	//		This function generates time-based UUIDs, meaning "version 1" UUIDs. 
+	// description: 
+	// For more info, see
+	//		http://www.webdav.org/specs/draft-leach-uuids-guids-01.txt
+	//		http://www.infonuovo.com/dma/csdocs/sketch/instidid.htm
+	//		http://kruithof.xs4all.nl/uuid/uuidgen
+	//		http://www.opengroup.org/onlinepubs/009629399/apdxa.htm#tagcjh_20
+	//		http://jakarta.apache.org/commons/sandbox/id/apidocs/org/apache/commons/id/uuid/clock/Clock.html
+	// node:
+	//		A 12-character hex string representing either a pseudo-node or 
+	//		hardware-node (an IEEE 802.3 network node).  A hardware-node 
+	//		will be something like "017bf397618a", always with the first bit 
+	//		being 0.  A pseudo-node will be something like "f17bf397618a", 
+	//		always with the first bit being 1.
+	// examples: 
+	//		string = dojox.uuid.generateTimeBasedUuid();
+	//		string = dojox.uuid.generateTimeBasedUuid("017bf397618a");
+	//		dojox.uuid.generateTimeBasedUuid.setNode("017bf397618a");
+	//		string = dojox.uuid.generateTimeBasedUuid(); // the generated UUID has node == "017bf397618a"	
+	var uuidString = dojox.uuid.generateTimeBasedUuid._generator.generateUuidString(node);
+	return uuidString; // String
+};
+
+dojox.uuid.generateTimeBasedUuid.isValidNode = function(/*String?*/ node){
+	var HEX_RADIX = 16;
+	var integer = parseInt(node, HEX_RADIX);
+	var valid = dojo.isString(node) && node.length == 12 && isFinite(integer);
+	return valid; // Boolean
+};
+
+dojox.uuid.generateTimeBasedUuid.setNode = function(/*String?*/ node){
+	// summary: 
+	//		Sets the 'node' value that will be included in generated UUIDs.
+	// node: A 12-character hex string representing a pseudoNode or hardwareNode.
+	dojox.uuid.assert((node === null) || this.isValidNode(node));
+	this._uniformNode = node;
+};
+
+dojox.uuid.generateTimeBasedUuid.getNode = function(){
+	// summary: 
+	//		Returns the 'node' value that will be included in generated UUIDs.
+	return this._uniformNode; // String (a 12-character hex string representing a pseudoNode or hardwareNode)
+};
+
+	
+dojox.uuid.generateTimeBasedUuid._generator = new function(){
+	// Number of hours between October 15, 1582 and January 1, 1970:
+	this.GREGORIAN_CHANGE_OFFSET_IN_HOURS = 3394248;
+	
+	// Number of seconds between October 15, 1582 and January 1, 1970:
+	//   dojox.uuid.generateTimeBasedUuid.GREGORIAN_CHANGE_OFFSET_IN_SECONDS = 12219292800;	
+	
+	// --------------------------------------------------
+	// Private variables:
+	var _uuidPseudoNodeString = null;
+	var _uuidClockSeqString = null;
+	var _dateValueOfPreviousUuid = null;
+	var _nextIntraMillisecondIncrement = 0;
+	var _cachedMillisecondsBetween1582and1970 = null;
+	var _cachedHundredNanosecondIntervalsPerMillisecond = null;
+	
+	// --------------------------------------------------
+	// Private constants:
+	var HEX_RADIX = 16;
+
+	function _carry(/* array */ arrayA){
+		// summary: 
+		//		Given an array which holds a 64-bit number broken into 4 16-bit 
+		//		elements, this method carries any excess bits (greater than 16-bits) 
+		//		from each array element into the next.
+		// arrayA: An array with 4 elements, each of which is a 16-bit number.
+		arrayA[2] += arrayA[3] >>> 16;
+		arrayA[3] &= 0xFFFF;
+		arrayA[1] += arrayA[2] >>> 16;
+		arrayA[2] &= 0xFFFF;
+		arrayA[0] += arrayA[1] >>> 16;
+		arrayA[1] &= 0xFFFF;
+		dojox.uuid.assert((arrayA[0] >>> 16) === 0);
+	}
+
+	function _get64bitArrayFromFloat(/* float */ x){
+		// summary: 
+		//		Given a floating point number, this method returns an array which 
+		//		holds a 64-bit number broken into 4 16-bit elements.
+		var result = new Array(0, 0, 0, 0);
+		result[3] = x % 0x10000;
+		x -= result[3];
+		x /= 0x10000;
+		result[2] = x % 0x10000;
+		x -= result[2];
+		x /= 0x10000;
+		result[1] = x % 0x10000;
+		x -= result[1];
+		x /= 0x10000;
+		result[0] = x;
+		return result; // Array with 4 elements, each of which is a 16-bit number.
+	}
+
+	function _addTwo64bitArrays(/* array */ arrayA, /* array */ arrayB){
+		// summary: 
+		//		Takes two arrays, each of which holds a 64-bit number broken into 4
+		//		16-bit elements, and returns a new array that holds a 64-bit number
+		//		that is the sum of the two original numbers.
+		// arrayA: An array with 4 elements, each of which is a 16-bit number.
+		// arrayB: An array with 4 elements, each of which is a 16-bit number.
+		dojox.uuid.assert(dojo.isArray(arrayA));
+		dojox.uuid.assert(dojo.isArray(arrayB));
+		dojox.uuid.assert(arrayA.length == 4);
+		dojox.uuid.assert(arrayB.length == 4);
+	
+		var result = new Array(0, 0, 0, 0);
+		result[3] = arrayA[3] + arrayB[3];
+		result[2] = arrayA[2] + arrayB[2];
+		result[1] = arrayA[1] + arrayB[1];
+		result[0] = arrayA[0] + arrayB[0];
+		_carry(result);
+		return result; // Array with 4 elements, each of which is a 16-bit number.
+	}
+
+	function _multiplyTwo64bitArrays(/* array */ arrayA, /* array */ arrayB){
+		// summary: 
+		//		Takes two arrays, each of which holds a 64-bit number broken into 4
+		//		16-bit elements, and returns a new array that holds a 64-bit number
+		//		that is the product of the two original numbers.
+		// arrayA: An array with 4 elements, each of which is a 16-bit number.
+		// arrayB: An array with 4 elements, each of which is a 16-bit number.
+		dojox.uuid.assert(dojo.isArray(arrayA));
+		dojox.uuid.assert(dojo.isArray(arrayB));
+		dojox.uuid.assert(arrayA.length == 4);
+		dojox.uuid.assert(arrayB.length == 4);
+	
+		var overflow = false;
+		if(arrayA[0] * arrayB[0] !== 0){ overflow = true; }
+		if(arrayA[0] * arrayB[1] !== 0){ overflow = true; }
+		if(arrayA[0] * arrayB[2] !== 0){ overflow = true; }
+		if(arrayA[1] * arrayB[0] !== 0){ overflow = true; }
+		if(arrayA[1] * arrayB[1] !== 0){ overflow = true; }
+		if(arrayA[2] * arrayB[0] !== 0){ overflow = true; }
+		dojox.uuid.assert(!overflow);
+	
+		var result = new Array(0, 0, 0, 0);
+		result[0] += arrayA[0] * arrayB[3];
+		_carry(result);
+		result[0] += arrayA[1] * arrayB[2];
+		_carry(result);
+		result[0] += arrayA[2] * arrayB[1];
+		_carry(result);
+		result[0] += arrayA[3] * arrayB[0];
+		_carry(result);
+		result[1] += arrayA[1] * arrayB[3];
+		_carry(result);
+		result[1] += arrayA[2] * arrayB[2];
+		_carry(result);
+		result[1] += arrayA[3] * arrayB[1];
+		_carry(result);
+		result[2] += arrayA[2] * arrayB[3];
+		_carry(result);
+		result[2] += arrayA[3] * arrayB[2];
+		_carry(result);
+		result[3] += arrayA[3] * arrayB[3];
+		_carry(result);
+		return result; // Array with 4 elements, each of which is a 16-bit number.
+	}
+
+	function _padWithLeadingZeros(/* string */ string, /* int */ desiredLength){
+		// summary: 
+		//		Pads a string with leading zeros and returns the result.
+		// string: A string to add padding to.
+		// desiredLength: The number of characters the return string should have.
+
+		// examples: 
+		//		result = _padWithLeadingZeros("abc", 6);
+		//		dojox.uuid.assert(result == "000abc");
+		while(string.length < desiredLength){
+			string = "0" + string;
+		}
+		return string; // string
+	}
+
+	function _generateRandomEightCharacterHexString() {
+		// summary: 
+		//		Returns a randomly generated 8-character string of hex digits.
+
+		// FIXME: This probably isn't a very high quality random number.
+	
+		// Make random32bitNumber be a randomly generated floating point number
+		// between 0 and (4,294,967,296 - 1), inclusive.
+		var random32bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 32) );
+	
+		var eightCharacterString = random32bitNumber.toString(HEX_RADIX);
+		while(eightCharacterString.length < 8){
+			eightCharacterString = "0" + eightCharacterString;
+		}
+		return eightCharacterString; // String (an 8-character hex string)
+	}
+	
+	this.generateUuidString = function(/*String?*/ node){
+		// summary: 
+		//		Generates a time-based UUID, meaning a version 1 UUID.  
+		// description: 
+		//		JavaScript code running in a browser doesn't have access to the 
+		//		IEEE 802.3 address of the computer, so if a node value isn't 
+		//		supplied, we generate a random pseudonode value instead.
+		// node: An optional 12-character string to use as the node in the new UUID.
+		if(node){
+			dojox.uuid.assert(dojox.uuid.generateTimeBasedUuid.isValidNode(node));
+		}else{
+			if(dojox.uuid.generateTimeBasedUuid._uniformNode){
+				node = dojox.uuid.generateTimeBasedUuid._uniformNode;
+			}else{
+				if(!_uuidPseudoNodeString){
+					var pseudoNodeIndicatorBit = 0x8000;
+					var random15bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 15) );
+					var leftmost4HexCharacters = (pseudoNodeIndicatorBit | random15bitNumber).toString(HEX_RADIX);
+					_uuidPseudoNodeString = leftmost4HexCharacters + _generateRandomEightCharacterHexString();
+				}
+				node = _uuidPseudoNodeString;
+			}
+		}
+		if(!_uuidClockSeqString){
+			var variantCodeForDCEUuids = 0x8000; // 10--------------, i.e. uses only first two of 16 bits.
+			var random14bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 14) );
+			_uuidClockSeqString = (variantCodeForDCEUuids | random14bitNumber).toString(HEX_RADIX);
+		}
+	
+		// Maybe we should think about trying to make the code more readable to
+		// newcomers by creating a class called "WholeNumber" that encapsulates
+		// the methods and data structures for working with these arrays that
+		// hold 4 16-bit numbers?  And then these variables below have names
+		// like "wholeSecondsPerHour" rather than "arraySecondsPerHour"?
+		var now = new Date();
+		var millisecondsSince1970 = now.valueOf(); // milliseconds since midnight 01 January, 1970 UTC.
+		var nowArray = _get64bitArrayFromFloat(millisecondsSince1970);
+		if(!_cachedMillisecondsBetween1582and1970){
+			var arraySecondsPerHour = _get64bitArrayFromFloat(60 * 60);
+			var arrayHoursBetween1582and1970 = _get64bitArrayFromFloat(dojox.uuid.generateTimeBasedUuid._generator.GREGORIAN_CHANGE_OFFSET_IN_HOURS);
+			var arraySecondsBetween1582and1970 = _multiplyTwo64bitArrays(arrayHoursBetween1582and1970, arraySecondsPerHour);
+			var arrayMillisecondsPerSecond = _get64bitArrayFromFloat(1000);
+			_cachedMillisecondsBetween1582and1970 = _multiplyTwo64bitArrays(arraySecondsBetween1582and1970, arrayMillisecondsPerSecond);
+			_cachedHundredNanosecondIntervalsPerMillisecond = _get64bitArrayFromFloat(10000);
+		}
+		var arrayMillisecondsSince1970 = nowArray;
+		var arrayMillisecondsSince1582 = _addTwo64bitArrays(_cachedMillisecondsBetween1582and1970, arrayMillisecondsSince1970);
+		var arrayHundredNanosecondIntervalsSince1582 = _multiplyTwo64bitArrays(arrayMillisecondsSince1582, _cachedHundredNanosecondIntervalsPerMillisecond);
+	
+		if(now.valueOf() == _dateValueOfPreviousUuid){
+			arrayHundredNanosecondIntervalsSince1582[3] += _nextIntraMillisecondIncrement;
+			_carry(arrayHundredNanosecondIntervalsSince1582);
+			_nextIntraMillisecondIncrement += 1;
+			if (_nextIntraMillisecondIncrement == 10000) {
+				// If we've gotten to here, it means we've already generated 10,000
+				// UUIDs in this single millisecond, which is the most that the UUID
+				// timestamp field allows for.  So now we'll just sit here and wait
+				// for a fraction of a millisecond, so as to ensure that the next
+				// time this method is called there will be a different millisecond
+				// value in the timestamp field.
+				while (now.valueOf() == _dateValueOfPreviousUuid) {
+					now = new Date();
+				}
+			}
+		}else{
+			_dateValueOfPreviousUuid = now.valueOf();
+			_nextIntraMillisecondIncrement = 1;
+		}
+	
+		var hexTimeLowLeftHalf  = arrayHundredNanosecondIntervalsSince1582[2].toString(HEX_RADIX);
+		var hexTimeLowRightHalf = arrayHundredNanosecondIntervalsSince1582[3].toString(HEX_RADIX);
+		var hexTimeLow = _padWithLeadingZeros(hexTimeLowLeftHalf, 4) + _padWithLeadingZeros(hexTimeLowRightHalf, 4);
+		var hexTimeMid = arrayHundredNanosecondIntervalsSince1582[1].toString(HEX_RADIX);
+		hexTimeMid = _padWithLeadingZeros(hexTimeMid, 4);
+		var hexTimeHigh = arrayHundredNanosecondIntervalsSince1582[0].toString(HEX_RADIX);
+		hexTimeHigh = _padWithLeadingZeros(hexTimeHigh, 3);
+		var hyphen = "-";
+		var versionCodeForTimeBasedUuids = "1"; // binary2hex("0001")
+		var resultUuid = hexTimeLow + hyphen + hexTimeMid + hyphen +
+					versionCodeForTimeBasedUuids + hexTimeHigh + hyphen +
+					_uuidClockSeqString + hyphen + node;
+		resultUuid = resultUuid.toLowerCase();
+		return resultUuid; // String (a 36 character string, which will look something like "b4308fb0-86cd-11da-a72b-0800200c9a66")
+	}
+
+}();
+
+}