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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,272 @@ | ||
| /*! | ||
| Autosize v1.18.9 - 2014-05-27 | ||
| Automatically adjust textarea height based on user input. | ||
| (c) 2014 Jack Moore - http://www.jacklmoore.com/autosize | ||
| license: http://www.opensource.org/licenses/mit-license.php | ||
| */ | ||
| (function ($) { | ||
| var | ||
| defaults = { | ||
| className: 'autosizejs', | ||
| id: 'autosizejs', | ||
| append: '\n', | ||
| callback: false, | ||
| resizeDelay: 10, | ||
| placeholder: true | ||
| }, | ||
|
|
||
| // border:0 is unnecessary, but avoids a bug in Firefox on OSX | ||
| copy = '<textarea tabindex="-1" style="position:absolute; top:-999px; left:0; right:auto; bottom:auto; border:0; padding: 0; -moz-box-sizing:content-box; -webkit-box-sizing:content-box; box-sizing:content-box; word-wrap:break-word; height:0 !important; min-height:0 !important; overflow:hidden; transition:none; -webkit-transition:none; -moz-transition:none;"/>', | ||
|
|
||
| // line-height is conditionally included because IE7/IE8/old Opera do not return the correct value. | ||
| typographyStyles = [ | ||
| 'fontFamily', | ||
| 'fontSize', | ||
| 'fontWeight', | ||
| 'fontStyle', | ||
| 'letterSpacing', | ||
| 'textTransform', | ||
| 'wordSpacing', | ||
| 'textIndent' | ||
| ], | ||
|
|
||
| // to keep track which textarea is being mirrored when adjust() is called. | ||
| mirrored, | ||
|
|
||
| // the mirror element, which is used to calculate what size the mirrored element should be. | ||
| mirror = $(copy).data('autosize', true)[0]; | ||
|
|
||
| // test that line-height can be accurately copied. | ||
| mirror.style.lineHeight = '99px'; | ||
| if ($(mirror).css('lineHeight') === '99px') { | ||
| typographyStyles.push('lineHeight'); | ||
| } | ||
| mirror.style.lineHeight = ''; | ||
|
|
||
| $.fn.autosize = function (options) { | ||
| if (!this.length) { | ||
| return this; | ||
| } | ||
|
|
||
| options = $.extend({}, defaults, options || {}); | ||
|
|
||
| if (mirror.parentNode !== document.body) { | ||
| $(document.body).append(mirror); | ||
| } | ||
|
|
||
| return this.each(function () { | ||
| var | ||
| ta = this, | ||
| $ta = $(ta), | ||
| maxHeight, | ||
| minHeight, | ||
| boxOffset = 0, | ||
| callback = $.isFunction(options.callback), | ||
| originalStyles = { | ||
| height: ta.style.height, | ||
| overflow: ta.style.overflow, | ||
| overflowY: ta.style.overflowY, | ||
| wordWrap: ta.style.wordWrap, | ||
| resize: ta.style.resize | ||
| }, | ||
| timeout, | ||
| width = $ta.width(), | ||
| taResize = $ta.css('resize'); | ||
|
|
||
| if ($ta.data('autosize')) { | ||
| // exit if autosize has already been applied, or if the textarea is the mirror element. | ||
| return; | ||
| } | ||
| $ta.data('autosize', true); | ||
|
|
||
| if ($ta.css('box-sizing') === 'border-box' || $ta.css('-moz-box-sizing') === 'border-box' || $ta.css('-webkit-box-sizing') === 'border-box'){ | ||
| boxOffset = $ta.outerHeight() - $ta.height(); | ||
| } | ||
|
|
||
| // IE8 and lower return 'auto', which parses to NaN, if no min-height is set. | ||
| minHeight = Math.max(parseInt($ta.css('minHeight'), 10) - boxOffset || 0, $ta.height()); | ||
|
|
||
| $ta.css({ | ||
| overflow: 'hidden', | ||
| overflowY: 'hidden', | ||
| wordWrap: 'break-word' // horizontal overflow is hidden, so break-word is necessary for handling words longer than the textarea width | ||
| }); | ||
|
|
||
| if (taResize === 'vertical') { | ||
| $ta.css('resize','none'); | ||
| } else if (taResize === 'both') { | ||
| $ta.css('resize', 'horizontal'); | ||
| } | ||
|
|
||
| // The mirror width must exactly match the textarea width, so using getBoundingClientRect because it doesn't round the sub-pixel value. | ||
| // window.getComputedStyle, getBoundingClientRect returning a width are unsupported, but also unneeded in IE8 and lower. | ||
| function setWidth() { | ||
| var width; | ||
| var style = window.getComputedStyle ? window.getComputedStyle(ta, null) : false; | ||
|
|
||
| if (style) { | ||
|
|
||
| width = ta.getBoundingClientRect().width; | ||
|
|
||
| if (width === 0 || typeof width !== 'number') { | ||
| width = parseInt(style.width,10); | ||
| } | ||
|
|
||
| $.each(['paddingLeft', 'paddingRight', 'borderLeftWidth', 'borderRightWidth'], function(i,val){ | ||
| width -= parseInt(style[val],10); | ||
| }); | ||
| } else { | ||
| width = $ta.width(); | ||
| } | ||
|
|
||
| mirror.style.width = Math.max(width,0) + 'px'; | ||
| } | ||
|
|
||
| function initMirror() { | ||
| var styles = {}; | ||
|
|
||
| mirrored = ta; | ||
| mirror.className = options.className; | ||
| mirror.id = options.id; | ||
| maxHeight = parseInt($ta.css('maxHeight'), 10); | ||
|
|
||
| // mirror is a duplicate textarea located off-screen that | ||
| // is automatically updated to contain the same text as the | ||
| // original textarea. mirror always has a height of 0. | ||
| // This gives a cross-browser supported way getting the actual | ||
| // height of the text, through the scrollTop property. | ||
| $.each(typographyStyles, function(i,val){ | ||
| styles[val] = $ta.css(val); | ||
| }); | ||
|
|
||
| $(mirror).css(styles).attr('wrap', $ta.attr('wrap')); | ||
|
|
||
| setWidth(); | ||
|
|
||
| // Chrome-specific fix: | ||
| // When the textarea y-overflow is hidden, Chrome doesn't reflow the text to account for the space | ||
| // made available by removing the scrollbar. This workaround triggers the reflow for Chrome. | ||
| if (window.chrome) { | ||
| var width = ta.style.width; | ||
| ta.style.width = '0px'; | ||
| var ignore = ta.offsetWidth; | ||
| ta.style.width = width; | ||
| } | ||
| } | ||
|
|
||
| // Using mainly bare JS in this function because it is going | ||
| // to fire very often while typing, and needs to very efficient. | ||
| function adjust() { | ||
| var height, original; | ||
|
|
||
| if (mirrored !== ta) { | ||
| initMirror(); | ||
| } else { | ||
| setWidth(); | ||
| } | ||
|
|
||
| if (!ta.value && options.placeholder) { | ||
| // If the textarea is empty, copy the placeholder text into | ||
| // the mirror control and use that for sizing so that we | ||
| // don't end up with placeholder getting trimmed. | ||
| mirror.value = ($ta.attr("placeholder") || '') + options.append; | ||
| } else { | ||
| mirror.value = ta.value + options.append; | ||
| } | ||
|
|
||
| mirror.style.overflowY = ta.style.overflowY; | ||
| original = parseInt(ta.style.height,10); | ||
|
|
||
| // Setting scrollTop to zero is needed in IE8 and lower for the next step to be accurately applied | ||
| mirror.scrollTop = 0; | ||
|
|
||
| mirror.scrollTop = 9e4; | ||
|
|
||
| // Using scrollTop rather than scrollHeight because scrollHeight is non-standard and includes padding. | ||
| height = mirror.scrollTop; | ||
|
|
||
| if (maxHeight && height > maxHeight) { | ||
| ta.style.overflowY = 'scroll'; | ||
| height = maxHeight; | ||
| } else { | ||
| ta.style.overflowY = 'hidden'; | ||
| if (height < minHeight) { | ||
| height = minHeight; | ||
| } | ||
| } | ||
|
|
||
| height += boxOffset; | ||
|
|
||
| if (original !== height) { | ||
| ta.style.height = height + 'px'; | ||
| if (callback) { | ||
| options.callback.call(ta,ta); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function resize () { | ||
| clearTimeout(timeout); | ||
| timeout = setTimeout(function(){ | ||
| var newWidth = $ta.width(); | ||
|
|
||
| if (newWidth !== width) { | ||
| width = newWidth; | ||
| adjust(); | ||
| } | ||
| }, parseInt(options.resizeDelay,10)); | ||
| } | ||
|
|
||
| if ('onpropertychange' in ta) { | ||
| if ('oninput' in ta) { | ||
| // Detects IE9. IE9 does not fire onpropertychange or oninput for deletions, | ||
| // so binding to onkeyup to catch most of those occasions. There is no way that I | ||
| // know of to detect something like 'cut' in IE9. | ||
| $ta.on('input.autosize keyup.autosize', adjust); | ||
| } else { | ||
| // IE7 / IE8 | ||
| $ta.on('propertychange.autosize', function(){ | ||
| if(event.propertyName === 'value'){ | ||
| adjust(); | ||
| } | ||
| }); | ||
| } | ||
| } else { | ||
| // Modern Browsers | ||
| $ta.on('input.autosize', adjust); | ||
| } | ||
|
|
||
| // Set options.resizeDelay to false if using fixed-width textarea elements. | ||
| // Uses a timeout and width check to reduce the amount of times adjust needs to be called after window resize. | ||
|
|
||
| if (options.resizeDelay !== false) { | ||
| $(window).on('resize.autosize', resize); | ||
| } | ||
|
|
||
| // Event for manual triggering if needed. | ||
| // Should only be needed when the value of the textarea is changed through JavaScript rather than user input. | ||
| $ta.on('autosize.resize', adjust); | ||
|
|
||
| // Event for manual triggering that also forces the styles to update as well. | ||
| // Should only be needed if one of typography styles of the textarea change, and the textarea is already the target of the adjust method. | ||
| $ta.on('autosize.resizeIncludeStyle', function() { | ||
| mirrored = null; | ||
| adjust(); | ||
| }); | ||
|
|
||
| $ta.on('autosize.destroy', function(){ | ||
| mirrored = null; | ||
| clearTimeout(timeout); | ||
| $(window).off('resize', resize); | ||
| $ta | ||
| .off('autosize') | ||
| .off('.autosize') | ||
| .css(originalStyles) | ||
| .removeData('autosize'); | ||
| }); | ||
|
|
||
| // Call adjust in case the textarea already contains text. | ||
| adjust(); | ||
| }); | ||
| }; | ||
| }(window.jQuery || window.$)); // jQuery or jQuery-like library, such as Zepto |