/**
* jquery.shave.js
* https://github.com/dollarshaveclub/shave
* 兼容主流浏览器 firefox,chrome,safari,opera,360激素浏览器极速模式,IE edge,应该兼容ie 6-9,确定兼容ie 10-11,兼容手机浏览器
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
typeof define === 'function' && define.amd ? define(factory) :
(factory());
}(this, (function () { 'use strict';
function shave(target, maxHeight) {
var opts = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
if (!maxHeight) throw Error('maxHeight is required');
var els = typeof target === 'string' ? document.querySelectorAll(target) : target;
if (!els) return;
var character = opts.character || '…';
var classname = opts.classname || 'js-shave';
var spaces = opts.spaces || true;
var charHtml = '' + character + '';
if (!('length' in els)) els = [els];
for (var i = 0; i < els.length; i += 1) {
var el = els[i];
var styles = el.style;
var span = el.querySelector('.' + classname);
var textProp = el.textContent === undefined ? 'innerText' : 'textContent';
// If element text has already been shaved
if (span) {
// Remove the ellipsis to recapture the original text
el.removeChild(el.querySelector('.js-shave-char'));
el[textProp] = el[textProp]; // eslint-disable-line
// nuke span, recombine text
}
var fullText = el[textProp];
var words = spaces ? fullText : fullText.split(' ');
// If 0 or 1 words, we're done
if (words.length < 2) continue;
// Temporarily remove any CSS height for text height calculation
var heightStyle = styles.height;
styles.height = 'auto';
var maxHeightStyle = styles.maxHeight;
styles.maxHeight = 'none';
// If already short enough, we're done
if (el.offsetHeight <= maxHeight) {
styles.height = heightStyle;
styles.maxHeight = maxHeightStyle;
continue;
}
// Binary search for number of words which can fit in allotted height
var max = words.length - 1;
var min = 0;
var pivot = void 0;
while (min < max) {
pivot = min + max + 1 >> 1; // eslint-disable-line no-bitwise
el[textProp] = spaces ? words.slice(0, pivot) : words.slice(0, pivot).join(' ');
el.insertAdjacentHTML('beforeend', charHtml);
if (el.offsetHeight > maxHeight) max = spaces ? pivot - 2 : pivot - 1;else min = pivot;
}
el[textProp] = spaces ? words.slice(0, max) : words.slice(0, max).join(' ');
el.insertAdjacentHTML('beforeend', charHtml);
var diff = spaces ? words.slice(max) : words.slice(max).join(' ');
el.insertAdjacentHTML('beforeend', '' + diff + '');
styles.height = heightStyle;
styles.maxHeight = maxHeightStyle;
}
}
/* global window */
if (typeof window !== 'undefined') {
var plugin = window.$ || window.jQuery || window.Zepto;
if (plugin) {
plugin.fn.shave = function shavePlugin(maxHeight, opts) {
shave(this, maxHeight, opts);
return this;
};
}
}
})));