/**

* Created by JUNHUI on 2016/11/21.

*/

/*

* 参数说明:

* obj: 对象, 要进行高亮显示的html标签节点.

* hlWords: 字符串, 要进行高亮的关键词词, 使用 竖杠(|)或空格分隔多个词 .

* bgColor: 背景颜色，默认为红色.

*/

(

function(){

'use strict';

angular.module('app')

.factory('HeightLight',function(){

function MarkHighLight(obj, hlWords, bgColor) {

hlWords = AnalyzeHighLightWords(hlWords);

if (obj == null || hlWords.length == 0)

return;

if (bgColor == null || bgColor == "") {

bgColor = "red";

}

MarkHighLightCore(obj, hlWords);

//执行高亮标记的核心方法

function MarkHighLightCore(obj, keyWords) {

var re = new RegExp(keyWords, "i");

var style = ' style="background-color:' + bgColor + ';" '

for (var i = 0; i < obj.childNodes.length; i++) {

var childObj = obj.childNodes[i];

if (childObj.nodeType == 3) {

if (childObj.data.search(re) == -1) continue;

var reResult = new RegExp("(" + keyWords + ")", "gi");

var objResult = document.createElement("span");

objResult.innerHTML = childObj.data.replace(reResult, "<span" + style + ">$1</span>");

if (childObj.data == objResult.childNodes[0].innerHTML) continue;

obj.replaceChild(objResult, childObj);

} else if (childObj.nodeType == 1) {

MarkHighLightCore(childObj, keyWords);

}

}

}

var hlWordshlWords;

var resultresult;

//分析关键词

function AnalyzeHighLightWords(hlWords) {

if (hlWords == null)

return "";

hlWordshlWords = hlWords.replace(/\s+/g, "|").replace(/\|+/g, "|");

hlWordshlWords = hlWords.replace(/(^\|*)|(\|*$)/g, "");

if (hlWords.length == 0) return "";

var wordsArr = hlWords.split("|");

if (wordsArr.length > 1) {

var resultArr = BubbleSort(wordsArr);

var result = "";

for (var i = 0; i < resultArr.length; i++) {

resultresult = result + "|" + resultArr[i];

}

return result.replace(/(^\|*)|(\|*$)/g, "");

} else {

return hlWords;

}

}

//利用冒泡排序法把长的关键词放前面

function BubbleSort(arr) {

var temp, exchange;

for (var i = 0; i < arr.length; i++) {

exchange = false;

for (var j = arr.length - 2; j >= i; j--) {

if ((arr[j + 1].length) > (arr[j]).length) {

temp = arr[j + 1]; arr[j + 1] = arr[j]; arr[j] = temp;

exchange = true;

}

}

if (!exchange) break;

}

return arr;

}

}

//end

function search() {

var obj = document.getElementById("waiDiv");

var keyWord = document.getElementById("keyWord");

MarkHighLight(obj, keyWord.value, "Orange");

}

return{

MarkHighLight:MarkHighLight

}

})

}

)();