added license

browserify

CanvasTextWrapper.js

@@ -1,182 +1,172 @@
 /*! CanvasTextWrapper
  *  https://github.com/namniak/CanvasTextWrapper
- *  Version:  0.3.0
+ *  Version:  0.4.0
  *  MIT License (http://www.opensource.org/licenses/mit-license.html)
- *  Copyright (c) 2014 Vadim Namniak
  */
 
-(function() {
-	'use strict';
 
-	var EL_WIDTH,EL_HEIGHT,MAX_TXT_WIDTH,MAX_TXT_HEIGHT;
+(function (root) {
 
-	var defaults = {
-		font: '18px Arial, sans-serif',
-		sizeToFill: false,      // text is resized to fill the container (given font size is ignored)
-		lineHeight: 1,          // default line height equivalent of '100%'
-		allowNewLine: true,     // breaks text on every new line character '\n'
-		lineBreak: 'auto',      // text fills the element's (canvas or parent) width going to a new line on a whole word
-		textAlign: 'left',      // each line of text is aligned left
-		verticalAlign: 'top',   // text lines block is aligned top
-		justifyLines: false,    // lines are not justified
-		paddingX: 0,            // 0px left & right text padding relatively to canvas or its container
-		paddingY: 0,            // 0px top & bottom text padding relatively to canvas or its container
-		fitParent: false,       // text is set to fit canvas width
-		strokeText: false       // text is stroked according to context configuration
-	};
+	function CanvasTextWrapper(canvas, text, options) {
+		'use strict';
 
-	var CanvasTextWrapper = function(canvas,text,options) {
-		if (!(this instanceof CanvasTextWrapper)) {
-			return new CanvasTextWrapper(canvas,text,options);
-		}
+		var defaults = {
+			font: '18px Arial, sans-serif',
+			sizeToFill: false,      // text is resized to fill the container (given font size is ignored)
+			lineHeight: 1,          // default line height equivalent of '100%'
+			allowNewLine: true,     // breaks text on every new line character '\n'
+			lineBreak: 'auto',      // text fills the element's (canvas or parent) width going to a new line on a whole word
+			textAlign: 'left',      // each line of text is aligned left
+			verticalAlign: 'top',   // text lines block is aligned top
+			justifyLines: false,    // lines are not justified
+			paddingX: 0,            // 0px left & right text padding relatively to canvas or its container
+			paddingY: 0,            // 0px top & bottom text padding relatively to canvas or its container
+			fitParent: false,       // text is set to fit canvas width
+			strokeText: false       // text is stroked according to context configuration
+		};
 
-		this.canvas = canvas;
-		this.text = text;
-		this.context = this.canvas.getContext('2d');
-		this.context.font = this.font;
-		this.context.textBaseline = 'bottom';
+		var opts = {};
 
 		for (var property in defaults) {
 			if (defaults.hasOwnProperty(property)) {
-				this[property] = (options && options[property]) ? options[property] : defaults[property];
+				opts[property] = (options && options[property]) ? options[property] : defaults[property];
 			}
 		}
 
-		EL_WIDTH = (this.fitParent === false) ? this.canvas.width : this.canvas.parentNode.clientWidth;
-		EL_HEIGHT = (this.fitParent === false) ? this.canvas.height : this.canvas.parentNode.clientHeight;
-		MAX_TXT_WIDTH = EL_WIDTH - (this.paddingX * 2);
-		MAX_TXT_HEIGHT = EL_HEIGHT - (this.paddingY * 2);
+		var context = canvas.getContext('2d');
+		context.font = opts.font;
+		context.textBaseline = 'bottom';
 
-		this._init();
-	};
+		var EL_WIDTH = (opts.fitParent === false) ? canvas.width : canvas.parentNode.clientWidth;
+		var EL_HEIGHT = (opts.fitParent === false) ? canvas.height : canvas.parentNode.clientHeight;
+		var MAX_TXT_WIDTH = EL_WIDTH - (opts.paddingX * 2);
+		var MAX_TXT_HEIGHT = EL_HEIGHT - (opts.paddingY * 2);
 
-	CanvasTextWrapper.prototype = {
-		_init: function() {
-			/* Substituting this line that causing a bug with font-weight numeric values	*/
-			//this.fontSize = parseInt(this.font.replace(/^\D+/g,''),10) || 18;
+		var fontSize, textBlockHeight, lines, newLineIndexes, textPos, lineHeight;
 
-			/* This line allow font values like : "italic 500 25px" to preserve both numeric a literal value of font-weight*/
-			this.fontSize = this.font.match(/\d+(px|em|\%)/g) ? +this.font.match(/\d+(px|em|\%)/g)[0].match(/\d+/g) : 18;
+		init();
 
-			this.textBlockHeight = 0;
-			this.lines = [];
-			this.newLineIndexes = [];
-			this.textPos = {x: 0,y: 0};
+		function init() {
+			fontSize = opts.font.match(/\d+(px|em|%)/g) ? +opts.font.match(/\d+(px|em|%)/g)[0].match(/\d+/g) : 18;
 
-			this._setFont(this.fontSize);
-			this._setLineHeight();
-			this._validate();
-			this._render();
-		},
+			textBlockHeight = 0;
+			lines = [];
+			newLineIndexes = [];
+			textPos = {x: 0, y: 0};
 
-		_render: function() {
-			if (this.sizeToFill) {
-				var numWords = this.text.trim().split(/\s+/).length;
+			setFont(fontSize);
+			setLineHeight();
+			validate();
+			render();
+		}
+
+		function render() {
+			if (opts.sizeToFill) {
+				var numWords = text.trim().split(/\s+/).length;
 				var fontSize = 0;
 
 				do {
-					this._setFont(++fontSize);
-					this.lineHeight = this.fontSize;
-					this._wrap();
-				} while (this.textBlockHeight < MAX_TXT_HEIGHT && (this.lines.join(' ').split(/\s+/).length == numWords));
+					setFont(++fontSize);
+					lineHeight = fontSize;
+					wrap();
+				} while (textBlockHeight < MAX_TXT_HEIGHT && (lines.join(' ').split(/\s+/).length == numWords));
 
-				this._setFont(--fontSize);
-				this.lineHeight = this.fontSize;
+				setFont(--fontSize);
+				lineHeight = fontSize;
 			} else {
-				this._wrap();
+				wrap();
 			}
 
-			if (this.justifyLines && this.lineBreak === 'auto') {
-				this._justify();
+			if (opts.justifyLines && opts.lineBreak === 'auto') {
+				justify();
 			}
 
-			this._setAlignY();
-			this._drawText();
-		},
+			setVerticalAlign();
+			drawText();
+		}
 
-		_setFont: function(fontSize) {
-			var fontParts = (!this.sizeToFill) ? this.font.split(/\b\d+px\b/i) : this.context.font.split(/\b\d+px\b/i);
-			this.context.font = fontParts[0] + fontSize + 'px' + fontParts[1];
-			this.fontSize = fontSize;
-		},
+		function setFont(fontSize) {
+			var fontParts = (!opts.sizeToFill) ? opts.font.split(/\b\d+px\b/i) : context.font.split(/\b\d+px\b/i);
+			context.font = fontParts[0] + fontSize + 'px' + fontParts[1];
+		}
 
-		_setLineHeight: function() {
-			if (!isNaN(this.lineHeight)) {
-				this.lineHeight = this.fontSize * this.lineHeight;
-			} else if (this.lineHeight.toString().indexOf('px') !== -1) {
-				this.lineHeight = parseInt(this.lineHeight);
-			} else if (this.lineHeight.toString().indexOf('%') !== -1) {
-				this.lineHeight = (parseInt(this.lineHeight) / 100) * this.fontSize;
+		function setLineHeight() {
+			if (!isNaN(opts.lineHeight)) {
+				lineHeight = fontSize * opts.lineHeight;
+			} else if (opts.lineHeight.toString().indexOf('px') !== -1) {
+				lineHeight = parseInt(opts.lineHeight);
+			} else if (opts.lineHeight.toString().indexOf('%') !== -1) {
+				lineHeight = (parseInt(opts.lineHeight) / 100) * fontSize;
 			}
-		},
+		}
 
-		_wrap: function() {
-			if (this.allowNewLine) {
-				var newLines = this.text.trim().split('\n');
-				for (var i = 0,idx = 0; i < newLines.length - 1; i++) {
+		function wrap() {
+			if (opts.allowNewLine) {
+				var newLines = text.trim().split('\n');
+				for (var i = 0, idx = 0; i < newLines.length - 1; i++) {
 					idx += newLines[i].trim().split(/\s+/).length;
-					this.newLineIndexes.push(idx)
+					newLineIndexes.push(idx)
 				}
 			}
 
-			var words = this.text.trim().split(/\s+/);
-			this._checkLength(words);
-			this._breakText(words);
+			var words = text.trim().split(/\s+/);
+			checkLength(words);
+			breakText(words);
 
-			this.textBlockHeight = this.lines.length * this.lineHeight;
-		},
+			textBlockHeight = lines.length * lineHeight;
+		}
 
-		_checkLength: function(words) {
-			var testString,tokenLen,sliced,leftover;
+		function checkLength(words) {
+			var testString, tokenLen, sliced, leftover;
 
 			for (var i = 0; i < words.length; i++) {
 				testString = '';
-				tokenLen = this.context.measureText(words[i]).width;
+				tokenLen = context.measureText(words[i]).width;
 
 				if (tokenLen > MAX_TXT_WIDTH) {
-					for (var k = 0; (this.context.measureText(testString + words[i][k]).width <= MAX_TXT_WIDTH) && (k < words[i].length); k++) {
+					for (var k = 0; (context.measureText(testString + words[i][k]).width <= MAX_TXT_WIDTH) && (k < words[i].length); k++) {
 						testString += words[i][k];
 					}
 
-					sliced = words[i].slice(0,k);
+					sliced = words[i].slice(0, k);
 					leftover = words[i].slice(k);
-					words.splice(i,1,sliced,leftover);
+					words.splice(i, 1, sliced, leftover);
 				}
 			}
-		},
+		}
 
-		_breakText: function(words) {
-			for (var i = 0,j = 0; i < words.length; j++) {
-				this.lines[j] = '';
+		function breakText(words) {
+			for (var i = 0, j = 0; i < words.length; j++) {
+				lines[j] = '';
 
-				if (this.lineBreak === 'auto') {
-					while ((this.context.measureText(this.lines[j] + words[i]).width <= MAX_TXT_WIDTH) && (i < words.length)) {
+				if (opts.lineBreak === 'auto') {
+					while ((context.measureText(lines[j] + words[i]).width <= MAX_TXT_WIDTH) && (i < words.length)) {
 
-						this.lines[j] += words[i] + ' ';
+						lines[j] += words[i] + ' ';
 						i++;
 
-						if (this.allowNewLine) {
-							for (var k = 0; k < this.newLineIndexes.length; k++) {
-								if (this.newLineIndexes[k] === i) {
+						if (opts.allowNewLine) {
+							for (var k = 0; k < newLineIndexes.length; k++) {
+								if (newLineIndexes[k] === i) {
 									j++;
-									this.lines[j] = '';
+									lines[j] = '';
 									break;
 								}
 							}
 						}
 					}
-					this.lines[j] = this.lines[j].trim();
+					lines[j] = lines[j].trim();
 				} else {
-					this.lines[j] = words[i];
+					lines[j] = words[i];
 					i++;
 				}
 			}
-		},
+		}
 
-		_justify: function() {
-			var maxLen,longestLineIndex,tokenLen;
-			for (var i = 0; i < this.lines.length; i++) {
-				tokenLen = this.context.measureText(this.lines[i]).width;
+		function justify() {
+			var maxLen, longestLineIndex, tokenLen;
+			for (var i = 0; i < lines.length; i++) {
+				tokenLen = context.measureText(lines[i]).width;
 
 				if (!maxLen || tokenLen > maxLen) {
 					maxLen = tokenLen;
@@ -185,18 +175,18 @@
 			}
 
 			// fill lines with extra spaces
-			var numWords,spaceLength,numOfSpaces,num,filler;
+			var numWords, spaceLength, numOfSpaces, num, filler;
 			var delimiter = '\u200A';
-			for (i = 0; i < this.lines.length; i++) {
+			for (i = 0; i < lines.length; i++) {
 				if (i === longestLineIndex) continue;
 
-				numWords = this.lines[i].trim().split(/\s+/).length;
+				numWords = lines[i].trim().split(/\s+/).length;
 				if (numWords <= 1) continue;
 
-				this.lines[i] = this.lines[i].trim().split(/\s+/).join(delimiter);
+				lines[i] = lines[i].trim().split(/\s+/).join(delimiter);
 
-				spaceLength = this.context.measureText(delimiter).width;
-				numOfSpaces = (maxLen - this.context.measureText(this.lines[i]).width) / spaceLength;
+				spaceLength = context.measureText(delimiter).width;
+				numOfSpaces = (maxLen - context.measureText(lines[i]).width) / spaceLength;
 				num = numOfSpaces / (numWords - 1);
 
 				filler = '';
@@ -204,85 +194,89 @@
 					filler += delimiter;
 				}
 
-				this.lines[i] = this.lines[i].trim().split(delimiter).join(filler);
+				lines[i] = lines[i].trim().split(delimiter).join(filler);
 				//console.log('numWords:', numWords, 'numOfSpaces:', numOfSpaces, 'num:', num);
 			}
-		},
+		}
 
-		_drawText: function() {
-			for (var i = 0; i < this.lines.length; i++) {
-				this._setAlignX(this.lines[i]);
+		function drawText() {
+			for (var i = 0; i < lines.length; i++) {
+				setHorizontalAlign(lines[i]);
 
-				this.textPos.y = parseInt(this.textPos.y) + this.lineHeight;
-				this.context.fillText(this.lines[i],this.textPos.x,this.textPos.y);
+				textPos.y = parseInt(textPos.y) + lineHeight;
+				context.fillText(lines[i], textPos.x, textPos.y);
 
-				if (this.strokeText) {
-					this.context.strokeText(this.lines[i],this.textPos.x,this.textPos.y);
+				if (opts.strokeText) {
+					context.strokeText(lines[i], textPos.x, textPos.y);
 				}
 			}
-		},
+		}
 
-		_setAlignX: function(line) {
-			if (this.textAlign == 'center') {
-				this.textPos.x = (EL_WIDTH - this.context.measureText(line).width) / 2;
-			} else if (this.textAlign == 'right') {
-				this.textPos.x = EL_WIDTH - this.context.measureText(line).width - this.paddingX;
+		function setHorizontalAlign(line) {
+			if (opts.textAlign == 'center') {
+				textPos.x = (EL_WIDTH - context.measureText(line).width) / 2;
+			} else if (opts.textAlign == 'right') {
+				textPos.x = EL_WIDTH - context.measureText(line).width - opts.paddingX;
 			} else {
-				this.textPos.x = this.paddingX;
+				textPos.x = opts.paddingX;
 			}
-		},
+		}
 
-		_setAlignY: function() {
-			if (this.verticalAlign == 'middle') {
-				this.textPos.y = (EL_HEIGHT - this.textBlockHeight) / 2;
-			} else if (this.verticalAlign == 'bottom') {
-				this.textPos.y = EL_HEIGHT - this.textBlockHeight - this.paddingY;
+		function setVerticalAlign() {
+			if (opts.verticalAlign == 'middle') {
+				textPos.y = (EL_HEIGHT - textBlockHeight) / 2;
+			} else if (opts.verticalAlign == 'bottom') {
+				textPos.y = EL_HEIGHT - textBlockHeight - opts.paddingY;
 			} else {
-				this.textPos.y = this.paddingY;
+				textPos.y = opts.paddingY;
 			}
-		},
+		}
 
-		_validate: function() {
-			if (!(this.canvas instanceof HTMLCanvasElement))
+		function validate() {
+			if (!(canvas instanceof HTMLCanvasElement))
 				throw new TypeError('The first parameter must be an instance of HTMLCanvasElement.');
 
-			if (typeof this.text !== 'string')
+			if (typeof text !== 'string')
 				throw new TypeError('The second parameter must be a string.');
 
-			if (isNaN(this.fontSize))
+			if (isNaN(fontSize))
 				throw new TypeError('Cannot parse "font".');
 
-			if (isNaN(this.lineHeight))
+			if (isNaN(lineHeight))
 				throw new TypeError('Cannot parse "lineHeight".');
 
-			if (this.textAlign.toLocaleLowerCase() !== 'left' && this.textAlign.toLocaleLowerCase() !== 'center' && this.textAlign.toLocaleLowerCase() !== 'right')
+			if (opts.textAlign.toLocaleLowerCase() !== 'left' && opts.textAlign.toLocaleLowerCase() !== 'center' && opts.textAlign.toLocaleLowerCase() !== 'right')
 				throw new TypeError('Property "textAlign" must be set to either "left", "center", or "right".');
 
-			if (this.verticalAlign.toLocaleLowerCase() !== 'top' && this.verticalAlign.toLocaleLowerCase() !== 'middle' && this.verticalAlign.toLocaleLowerCase() !== 'bottom')
+			if (opts.verticalAlign.toLocaleLowerCase() !== 'top' && opts.verticalAlign.toLocaleLowerCase() !== 'middle' && opts.verticalAlign.toLocaleLowerCase() !== 'bottom')
 				throw new TypeError('Property "verticalAlign" must be set to either "top", "middle", or "bottom".');
 
-			if (typeof this.justifyLines !== 'boolean')
+			if (typeof opts.justifyLines !== 'boolean')
 				throw new TypeError('Property "justifyLines" must be set to a Boolean.');
 
-			if (isNaN(this.paddingX))
+			if (isNaN(opts.paddingX))
 				throw new TypeError('Property "paddingX" must be set to a Number.');
 
-			if (isNaN(this.paddingY))
+			if (isNaN(opts.paddingY))
 				throw new TypeError('Property "paddingY" must be set to a Number.');
 
-			if (typeof this.fitParent !== 'boolean')
+			if (typeof opts.fitParent !== 'boolean')
 				throw new TypeError('Property "fitParent" must be set to a Boolean.');
 
-			if (this.lineBreak.toLocaleLowerCase() !== 'auto' && this.lineBreak.toLocaleLowerCase() !== 'word')
+			if (opts.lineBreak.toLocaleLowerCase() !== 'auto' && opts.lineBreak.toLocaleLowerCase() !== 'word')
 				throw new TypeError('Property "lineBreak" must be set to either "auto" or "word".');
 
-			if (typeof this.sizeToFill !== 'boolean')
+			if (typeof opts.sizeToFill !== 'boolean')
 				throw new TypeError('Property "sizeToFill" must be set to a Boolean.');
 
-			if (typeof this.strokeText !== 'boolean')
+			if (typeof opts.strokeText !== 'boolean')
 				throw new TypeError('Property "strokeText" must be set to a Boolean.');
 		}
-	};
+	}
 
-	window.CanvasTextWrapper = CanvasTextWrapper;
-})();
+	if ('module' in root && 'exports' in module) {
+		module.exports = CanvasTextWrapper;
+	} else {
+		root.CanvasTextWrapper = CanvasTextWrapper;
+	}
+})(this);

LICENSE.md

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+Copyright (c) 2015 Vadim Namniak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -3,7 +3,7 @@ CanvasTextWrapper
 
 ##Syntax
 ```
-new CanvasTextWrapper(HTMLCanvasElement, String [, options]);
+CanvasTextWrapper(HTMLCanvasElement, String [, options]);
 ```
 
 ```options``` - is an object with the following available properties and values:

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "canvas-text-wrapper",
-  "version": "0.3.2",
+  "version": "0.4.0",
   "ignore": [
     "**/.*",
     "**/*.log",

example.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <script src="CanvasTextWrapper.js"></script>
+    <script >
+      var ctx = document.createElement('canvas').getContext('2d');
+      ctx.canvas.width = ctx.canvas.height = 200;
+      CanvasTextWrapper(ctx.canvas, "hello world how long can this be????");
+      document.addEventListener('DOMContentLoaded', function () {
+        document.body.appendChild(ctx.canvas);
+      });
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
+