JS控制文字只显示两行，超出部分显示省略号

(function($) { ???$.fn.ellipsis = function(options) { ???????// default option ???????var defaults = { ???????????‘row‘ :2, // show rows ???????????‘onlyFullWords‘: false, // set to true to avoid cutting the text in the middle of a word ???????????‘char‘ : ‘...‘, // ellipsis ???????????‘callback‘: function() {}, ???????????‘position‘: ‘tail‘ // middle, tail ???????}; ???????options = $.extend(defaults, options); ???????this.each(function() { ???????????// get element text ???????????var $this = $(this); ???????????var text = $this.text(); ???????????var origText = text; ???????????var origLength = origText.length; ???????????var origHeight = $this.height(); ???????????// get height ???????????$this.text(‘a‘); ???????????var lineHeight = ?parseFloat($this.css("lineHeight"), 10); ???????????var rowHeight = $this.height(); ???????????var gapHeight = lineHeight > rowHeight ? (lineHeight - rowHeight) : 0; ???????????var targetHeight = gapHeight * (options.row - 1) + rowHeight * options.row; ???????????if (origHeight <= targetHeight) { ???????????????$this.text(text); ???????????????options.callback.call(this); ???????????????return; ???????????} ???????????var start = 1, length = 0; ???????????var end = text.length; ???????????if(options.position === ‘tail‘) { ???????????????while (start < end) { // Binary search for max length ???????????????????length = Math.ceil((start + end) / 2); ???????????????????$this.text(text.slice(0, length) + options[‘char‘]); ???????????????????if ($this.height() <= targetHeight) { ???????????????????????start = length; ???????????????????} else { ???????????????????????end = length - 1; ???????????????????} ???????????????} ???????????????text = text.slice(0, start); ???????????????if (options.onlyFullWords) { ???????????????????text = text.replace(/[\u00AD\w\uac00-\ud7af]+$/, ‘‘); // remove fragment of the last word together with possible soft-hyphen characters ???????????????} ???????????????text += options[‘char‘]; ???????????}else if(options.position === ‘middle‘) { ???????????????var sliceLength = 0; ???????????????while (start < end) { // Binary search for max length ???????????????????length = Math.ceil((start + end) / 2); ???????????????????sliceLength = Math.max(origLength - length, 0); ???????????????????$this.text( ???????????????????????origText.slice(0, Math.floor((origLength - sliceLength) / 2)) + ??????????????????????????????options[‘char‘] + ??????????????????????????????origText.slice(Math.floor((origLength + sliceLength) / 2), origLength) ???????????????????); ???????????????????if ($this.height() <= targetHeight) { ???????????????????????start = length; ???????????????????} else { ???????????????????????end = length - 1; ???????????????????} ???????????????} ???????????????sliceLength = Math.max(origLength - start, 0); ???????????????var head = origText.slice(0, Math.floor((origLength - sliceLength) / 2)); ???????????????var tail = origText.slice(Math.floor((origLength + sliceLength) / 2), origLength); ???????????????if (options.onlyFullWords) { ???????????????????// remove fragment of the last or first word together with possible soft-hyphen characters ???????????????????head = head.replace(/[\u00AD\w\uac00-\ud7af]+$/, ‘‘); ???????????????} ???????????????text = head + options[‘char‘] + tail; ???????????} ???????????$this.text(text); ???????????options.callback.call(this); ???????}); ???????return this; ???};}) (jQuery);

(function ($) { ???var $ellipsis = $.fn.ellipsis; ???$ellipsis.unobtrusive = { ???????parseElement: function (element) { ???????????var $element = $(element); ???????????var maxWidth = $element.data(‘ellipsis-max-width‘); ???????????maxWidth = maxWidth ? parseInt(maxWidth) : 0; ???????????var maxLine = $element.data(‘ellipsis-max-line‘); ???????????maxLine = maxLine ? parseInt(maxLine) : 1; ???????????$element.ellipsis({ maxWidth: maxWidth, maxLine: maxLine }); ???????}, ???????parse: function (selector) { ???????????$(selector).find("[data-ellipsis=true]").each(function () { ???????????????$ellipsis.unobtrusive.parseElement(this); ???????????}); ???????} ???}; ???$(function () { ???????var beginAt = new Date; ???????if($ellipsis.debug){ ???????????console.log(beginAt); ???????} ???????$ellipsis.unobtrusive.parse(document); ???????if($ellipsis.debug){ ???????????var endAt = new Date; ???????????console.log(endAt); ???????????console.log(endAt - beginAt); ???????} ???});}(jQuery));