Actualización

main/inc/lib/javascript/textareacounter/jquery.textareaCounter.plugin.js

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+/*
+ * jQuery Textarea Characters Counter Plugin v 2.0
+ * Examples and documentation at: http://roy-jin.appspot.com/jsp/textareaCounter.jsp
+ * Copyright (c) 2010 Roy Jin
+ * Version: 2.0 (11-JUN-2010)
+ * Dual licensed under the MIT and GPL licenses:
+ * http://www.opensource.org/licenses/mit-license.php
+ * http://www.gnu.org/licenses/gpl.html
+ * Requires: jQuery v1.4.2 or later
+ */
+(function($){  
+	$.fn.textareaCount = function(options, fn) {   
+		var defaults = {  
+			maxCharacterSize: -1,  
+			originalStyle: 'originalTextareaInfo',
+			warningStyle: 'warningTextareaInfo',  
+			warningNumber: 20,
+			displayFormat: '#input characters | #words words'
+		};  
+		var options = $.extend(defaults, options);
+		
+		var container = $(this);
+		
+		$("<div class='charleft'>&nbsp;</div>").insertAfter(container);
+		
+		//create charleft css
+		var charLeftCss = {
+			'width' : container.width()
+		};
+		
+		var charLeftInfo = getNextCharLeftInformation(container);
+		charLeftInfo.addClass(options.originalStyle);
+		charLeftInfo.css(charLeftCss);
+		
+		var numInput = 0;
+		var maxCharacters = options.maxCharacterSize;
+		var numLeft = 0;
+		var numWords = 0;
+				
+		container.bind('keyup', function(event){limitTextAreaByCharacterCount();})
+				 .bind('mouseover', function(event){setTimeout(function(){limitTextAreaByCharacterCount();}, 10);})
+				 .bind('paste', function(event){setTimeout(function(){limitTextAreaByCharacterCount();}, 10);});
+		
+		
+		function limitTextAreaByCharacterCount(){
+			charLeftInfo.html(countByCharacters());
+			//function call back
+			if(typeof fn != 'undefined'){
+				fn.call(this, getInfo());
+			}
+			return true;
+		}
+		
+		function countByCharacters(){
+			var content = container.val();
+			var contentLength = content.length;
+			
+			//Start Cut
+			if(options.maxCharacterSize > 0){
+				//If copied content is already more than maxCharacterSize, chop it to maxCharacterSize.
+				if(contentLength >= options.maxCharacterSize) {
+					content = content.substring(0, options.maxCharacterSize); 				
+				}
+				
+				var newlineCount = getNewlineCount(content);
+				
+				// newlineCount new line character. For windows, it occupies 2 characters
+				var systemmaxCharacterSize = options.maxCharacterSize - newlineCount;
+				if (!isWin()){
+					 systemmaxCharacterSize = options.maxCharacterSize
+				}
+				if(contentLength > systemmaxCharacterSize){
+					//avoid scroll bar moving
+					var originalScrollTopPosition = this.scrollTop;
+					container.val(content.substring(0, systemmaxCharacterSize));
+					this.scrollTop = originalScrollTopPosition;
+				}
+				charLeftInfo.removeClass(options.warningStyle);
+				if(systemmaxCharacterSize - contentLength <= options.warningNumber){
+					charLeftInfo.addClass(options.warningStyle);
+				}
+				
+				numInput = container.val().length + newlineCount;
+				if(!isWin()){
+					numInput = container.val().length;
+				}
+			
+				numWords = countWord(getCleanedWordString(container.val()));
+				
+				numLeft = maxCharacters - numInput;
+			} else {
+				//normal count, no cut
+				var newlineCount = getNewlineCount(content);
+				numInput = container.val().length + newlineCount;
+				if(!isWin()){
+					numInput = container.val().length;
+				}
+				numWords = countWord(getCleanedWordString(container.val()));
+			}
+			
+			return formatDisplayInfo();
+		}
+		
+		function formatDisplayInfo(){
+			var format = options.displayFormat;
+			format = format.replace('#input', numInput);
+			format = format.replace('#words', numWords);
+			//When maxCharacters <= 0, #max, #left cannot be substituted.
+			if(maxCharacters > 0){
+				format = format.replace('#max', maxCharacters);
+				format = format.replace('#left', numLeft);
+			}
+			return format;
+		}
+		
+		function getInfo(){
+			var info = {
+				input: numInput,
+				max: maxCharacters,
+				left: numLeft,
+				words: numWords
+			};
+			return info;
+		}
+		
+		function getNextCharLeftInformation(container){
+				return container.next('.charleft');
+		}
+		
+		function isWin(){
+			var strOS = navigator.appVersion;
+			if (strOS.toLowerCase().indexOf('win') != -1){
+				return true;
+			}
+			return false;
+		}
+		
+		function getNewlineCount(content){
+			var newlineCount = 0;
+			for(var i=0; i<content.length;i++){
+				if(content.charAt(i) == '\n'){
+					newlineCount++;
+				}
+			}
+			return newlineCount;
+		}
+		
+		function getCleanedWordString(content){
+			var fullStr = content + " ";
+			var initial_whitespace_rExp = /^[^A-Za-z0-9]+/gi;
+			var left_trimmedStr = fullStr.replace(initial_whitespace_rExp, "");
+			var non_alphanumerics_rExp = rExp = /[^A-Za-z0-9]+/gi;
+			var cleanedStr = left_trimmedStr.replace(non_alphanumerics_rExp, " ");
+			var splitString = cleanedStr.split(" ");
+			return splitString;
+		}
+		
+		function countWord(cleanedWordString){
+			var word_count = cleanedWordString.length-1;
+			return word_count;
+		}
+	};  
+})(jQuery);