288 lines
7.5 KiB
JavaScript
288 lines
7.5 KiB
JavaScript
/*!
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autosize 4.0.2
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license: MIT
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http://www.jacklmoore.com/autosize
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*/
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(function (global, factory) {
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if (typeof define === "function" && define.amd) {
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define(['module', 'exports'], factory);
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} else if (typeof exports !== "undefined") {
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factory(module, exports);
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} else {
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var mod = {
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exports: {}
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};
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factory(mod, mod.exports);
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global.autosize = mod.exports;
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}
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})(this, function (module, exports) {
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'use strict';
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var map = typeof Map === "function" ? new Map() : function () {
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var keys = [];
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var values = [];
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return {
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has: function has(key) {
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return keys.indexOf(key) > -1;
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},
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get: function get(key) {
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return values[keys.indexOf(key)];
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},
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set: function set(key, value) {
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if (keys.indexOf(key) === -1) {
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keys.push(key);
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values.push(value);
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}
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},
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delete: function _delete(key) {
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var index = keys.indexOf(key);
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if (index > -1) {
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keys.splice(index, 1);
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values.splice(index, 1);
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}
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}
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};
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}();
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var createEvent = function createEvent(name) {
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return new Event(name, { bubbles: true });
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};
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try {
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new Event('test');
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} catch (e) {
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// IE does not support `new Event()`
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createEvent = function createEvent(name) {
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var evt = document.createEvent('Event');
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evt.initEvent(name, true, false);
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return evt;
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};
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}
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function assign(ta) {
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if (!ta || !ta.nodeName || ta.nodeName !== 'TEXTAREA' || map.has(ta)) return;
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var heightOffset = null;
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var clientWidth = null;
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var cachedHeight = null;
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function init() {
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var style = window.getComputedStyle(ta, null);
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if (style.resize === 'vertical') {
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ta.style.resize = 'none';
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} else if (style.resize === 'both') {
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ta.style.resize = 'horizontal';
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}
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if (style.boxSizing === 'content-box') {
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heightOffset = -(parseFloat(style.paddingTop) + parseFloat(style.paddingBottom));
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} else {
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heightOffset = parseFloat(style.borderTopWidth) + parseFloat(style.borderBottomWidth);
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}
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// Fix when a textarea is not on document body and heightOffset is Not a Number
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if (isNaN(heightOffset)) {
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heightOffset = 0;
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}
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update();
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}
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function changeOverflow(value) {
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{
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// Chrome/Safari-specific fix:
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// When the textarea y-overflow is hidden, Chrome/Safari do not reflow the text to account for the space
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// made available by removing the scrollbar. The following forces the necessary text reflow.
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var width = ta.style.width;
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ta.style.width = '0px';
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// Force reflow:
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/* jshint ignore:start */
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ta.offsetWidth;
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/* jshint ignore:end */
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ta.style.width = width;
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}
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ta.style.overflowY = value;
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}
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function getParentOverflows(el) {
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var arr = [];
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while (el && el.parentNode && el.parentNode instanceof Element) {
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if (el.parentNode.scrollTop) {
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arr.push({
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node: el.parentNode,
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scrollTop: el.parentNode.scrollTop
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});
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}
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el = el.parentNode;
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}
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return arr;
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}
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function resize() {
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if (ta.scrollHeight === 0) {
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// If the scrollHeight is 0, then the element probably has display:none or is detached from the DOM.
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return;
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}
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var overflows = getParentOverflows(ta);
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var docTop = document.documentElement && document.documentElement.scrollTop; // Needed for Mobile IE (ticket #240)
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ta.style.height = '';
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ta.style.height = ta.scrollHeight + heightOffset + 'px';
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// used to check if an update is actually necessary on window.resize
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clientWidth = ta.clientWidth;
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// prevents scroll-position jumping
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overflows.forEach(function (el) {
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el.node.scrollTop = el.scrollTop;
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});
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if (docTop) {
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document.documentElement.scrollTop = docTop;
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}
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}
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function update() {
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resize();
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var styleHeight = Math.round(parseFloat(ta.style.height));
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var computed = window.getComputedStyle(ta, null);
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// Using offsetHeight as a replacement for computed.height in IE, because IE does not account use of border-box
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var actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(computed.height)) : ta.offsetHeight;
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// The actual height not matching the style height (set via the resize method) indicates that
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// the max-height has been exceeded, in which case the overflow should be allowed.
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if (actualHeight < styleHeight) {
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if (computed.overflowY === 'hidden') {
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changeOverflow('scroll');
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resize();
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actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
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}
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} else {
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// Normally keep overflow set to hidden, to avoid flash of scrollbar as the textarea expands.
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if (computed.overflowY !== 'hidden') {
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changeOverflow('hidden');
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resize();
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actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
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}
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}
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if (cachedHeight !== actualHeight) {
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cachedHeight = actualHeight;
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var evt = createEvent('autosize:resized');
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try {
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ta.dispatchEvent(evt);
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} catch (err) {
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// Firefox will throw an error on dispatchEvent for a detached element
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// https://bugzilla.mozilla.org/show_bug.cgi?id=889376
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}
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}
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}
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var pageResize = function pageResize() {
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if (ta.clientWidth !== clientWidth) {
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update();
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}
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};
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var destroy = function (style) {
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window.removeEventListener('resize', pageResize, false);
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ta.removeEventListener('input', update, false);
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ta.removeEventListener('keyup', update, false);
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ta.removeEventListener('autosize:destroy', destroy, false);
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ta.removeEventListener('autosize:update', update, false);
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Object.keys(style).forEach(function (key) {
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ta.style[key] = style[key];
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});
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map.delete(ta);
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}.bind(ta, {
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height: ta.style.height,
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resize: ta.style.resize,
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overflowY: ta.style.overflowY,
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overflowX: ta.style.overflowX,
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wordWrap: ta.style.wordWrap
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});
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ta.addEventListener('autosize:destroy', destroy, false);
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// IE9 does not fire onpropertychange or oninput for deletions,
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// so binding to onkeyup to catch most of those events.
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// There is no way that I know of to detect something like 'cut' in IE9.
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if ('onpropertychange' in ta && 'oninput' in ta) {
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ta.addEventListener('keyup', update, false);
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}
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window.addEventListener('resize', pageResize, false);
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ta.addEventListener('input', update, false);
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ta.addEventListener('autosize:update', update, false);
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ta.style.overflowX = 'hidden';
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ta.style.wordWrap = 'break-word';
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map.set(ta, {
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destroy: destroy,
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update: update
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});
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init();
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}
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function destroy(ta) {
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var methods = map.get(ta);
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if (methods) {
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methods.destroy();
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}
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}
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function update(ta) {
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var methods = map.get(ta);
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if (methods) {
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methods.update();
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}
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}
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var autosize = null;
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// Do nothing in Node.js environment and IE8 (or lower)
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if (typeof window === 'undefined' || typeof window.getComputedStyle !== 'function') {
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autosize = function autosize(el) {
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return el;
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};
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autosize.destroy = function (el) {
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return el;
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};
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autosize.update = function (el) {
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return el;
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};
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} else {
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autosize = function autosize(el, options) {
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if (el) {
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Array.prototype.forEach.call(el.length ? el : [el], function (x) {
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return assign(x, options);
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});
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}
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return el;
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};
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autosize.destroy = function (el) {
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if (el) {
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Array.prototype.forEach.call(el.length ? el : [el], destroy);
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}
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return el;
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};
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autosize.update = function (el) {
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if (el) {
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Array.prototype.forEach.call(el.length ? el : [el], update);
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}
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return el;
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};
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}
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exports.default = autosize;
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module.exports = exports['default'];
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}); |