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btag-parser.js
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156 lines (137 loc) · 11.9 KB
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(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.btagParser = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var DEFAULT_TAG = ['b', 'i', 'u'];
var regLib = {
tag: {
br: /<br\s*\/?>/
},
specialSym: /([<>&])/g
};
var specialMap = {
'<': '<',
'>': '>',
'&': '&'
};
var utils = {
filterIllegalSym: function (str) {
return str.replace(regLib.specialSym, function (unit, sym) {
return specialMap[sym] || unit;
});
},
smartyMerge: function (rootObj, newObj) {
var tempObj = {};
newObj = newObj || {};
for (var i in rootObj ) {
tempObj[i] = rootObj[i];
if (i in newObj) {
tempObj[i] = newObj[i];
}
}
return tempObj;
},
isArray: function (item) {
return item instanceof Array;
},
tagRegCreator: function (tagList, stringify) {
var regStr = '<([' + tagList.join('|') + '])>(.*?)<\\/\\1>';
if (stringify) {
return regStr;
}
return new RegExp(regStr, 'g');
}
};
var parseBr = function (str, keepPure, brReg) {
if (!str || !brReg) {
return [{type: 'text', value: str}];
}
var group = str.split(brReg);
var parsedGroup = [];
var strUnit;
var gL = group.length;
var gLLess = gL - 1;
for (var i = 0; i < gLLess; i++) {
strUnit = group[i];
if (strUnit === '') {
parsedGroup.push({
type: 'br'
});
continue;
}
if (keepPure) {
strUnit = utils.filterIllegalSym(strUnit);
}
parsedGroup
.splice(parsedGroup.length, 0, {type: 'text', value: strUnit}, {type: 'br'});
}
// 结尾处特殊处理
if (gLLess >= 0) {
strUnit = group[gLLess];
if (strUnit !== '') {
if (keepPure) {
strUnit = utils.filterIllegalSym(strUnit);
}
parsedGroup.push({
type: 'text',
value: strUnit
});
}
}
return parsedGroup;
};
var parserWrapper = function (opt) {
var options = utils.smartyMerge({
tagList: DEFAULT_TAG,
// 换行符号，支持<br>标签和其它换行字符
brSym: 'br'
}, opt);
var brReg;
if (options.brSym) {
if (options.brSym === 'br') {
brReg = regLib.tag.br;
}
else {
brReg = options.brSym;
}
}
var tagList = options.tagList;
if (!tagList || !utils.isArray(tagList) || !tagList.length) {
return function (strUnit, keepPure) {
return parseBr(strUnit, keepPure, brReg);
};
}
var regStr = utils.tagRegCreator(tagList, true);
var tagParser = function (strUnit, keepPure) {
if (!strUnit) {
return parseBr(strUnit, keepPure, brReg);
}
var group = [];
var execResult;
var tagReg = new RegExp(regStr, 'g');
var startPos = strUnit.search(tagReg);
var lastPos = 0;
while (execResult = tagReg.exec(strUnit)) {
var fullStr = execResult[0];
var tagType = execResult[1];
var mixinStr = execResult[2];
var leftOffset = tagReg.lastIndex - lastPos - fullStr.length;
if (leftOffset > 0) {
var extraStr = strUnit.substr(lastPos, leftOffset);
group = group.concat(parseBr(extraStr, keepPure, brReg));
}
var nextParsedVal = tagParser(mixinStr, keepPure);
lastPos = tagReg.lastIndex;
group.push({
type: tagType,
value: nextParsedVal
});
}
if (lastPos < strUnit.length) {
group = group.concat(parseBr(strUnit.slice(lastPos), keepPure, brReg));
}
return group.length ? group : parseBr(strUnit, keepPure, brReg);
};
return tagParser;
};
module.exports = parserWrapper;
},{}]},{},[1])(1)
});
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