158 lines
5.2 KiB
JavaScript
158 lines
5.2 KiB
JavaScript
/**
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* 实现将{}转化为字符串
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*
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* 为什么不使用JSON.stringify?
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*
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* 假设有这样的翻译内容
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* {
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* "保存{}\n": "Save{}\n",
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* }
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* 这个内容中包含了转义字符\n，JSON.stringify会将\n转义为\\n
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* 因此，在保存后文件中就变成：
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* {
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* "保存{}\\n": "Save{}\n",
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* }
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* 这个转义方式比较不符合我们的预期，更关键的是，在require("zh.js")时，
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* 得到的是：
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* {
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* "保存{}\\n": "Save{}\n",
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* }
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* 这样当我们调用t函数时就会找不到对应在的key
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*
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* 问题的关键就在于，JSON.stringify对转义字符的处理不能符合我们的要求。
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*
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* 因此，不得不自己来处理转义字符.
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*
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* 使用objectToString方法后，就可以确保在翻译文件中的转义字符能按预期的方式工作。
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*
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*
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*
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*/
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const { isPlainObject } = require("./utils")
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/**
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*
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* JSON.stringify在将一个JSON转化为字符串时会对字符串里面的\t等转义符进行再次转义
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* 导致在使用包含\t等转义符为key时会出现问题
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*
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*
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* @param {*} obj
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* @returns
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*/
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function escape(str){
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return str.replaceAll(/\\\\(?![trnbvf'"]{1})/g,"\\\\")
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.replaceAll("\t","\\t")
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.replaceAll("\n","\\n")
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.replaceAll("\b","\\b")
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.replaceAll("\r","\\r")
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.replaceAll("\f","\\f")
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.replaceAll("\'","\\'")
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.replaceAll('\"','\\"')
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.replaceAll('\v','\\v')
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}
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function unescape(str){
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return str
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.replaceAll("\\t","\t")
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.replaceAll("\\n","\n")
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.replaceAll("\\b","\b")
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.replaceAll("\\r","\r")
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.replaceAll("\\f","\f")
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.replaceAll("\\'","\'")
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.replaceAll('\\"','\"')
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.replaceAll('\\v','\v')
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//.replaceAll("\\\\",'\\')
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}
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/**
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* 获取字符串的长度，中文算两个字符
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* @param {*} s
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* @returns
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*/
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function getStringWidth(s){
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let str = String(s)
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var realLength = 0, len = str.length, charCode = -1;
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for (var i = 0; i < len; i++) {
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charCode = str.charCodeAt(i);
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if (charCode >= 0 && charCode <= 128) realLength += 1;
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else realLength += 2;
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}
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return realLength;
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}
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function objectStringify(obj,{indent=4,alignKey=true}={}){
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function nodeToString(node,level,last=false){
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let results = [],beginChar = "",endChar = ""
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level++
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if(Array.isArray(node)){
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beginChar = "[\n"
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node.forEach((value,index)=>{
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const isLastItem = index ===node.length-1
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let item = value
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if(Array.isArray(value) || isPlainObject(value)){
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item = nodeToString(value, level,isLastItem)
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}else if(typeof(value)==="string"){
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item = `"${escape(value)}"`
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}else if(typeof(value)==="number"){
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item = value.toString()
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}else if(typeof(value)==="boolean"){
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item = value.toString()
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}
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// 如果最后一项
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if(!isLastItem){
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item = item+","
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}else{
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item = item+"\n"
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}
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results.push(item)
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})
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endChar =" ".repeat((level-1) * indent) + "]"
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return beginChar + results.map(item=>{
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return `${" ".repeat(level * indent)}${item}`
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}).join("\n") + endChar
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}else if(isPlainObject(node)){
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beginChar = "{\n"
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const length = Object.keys(node).length
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const indentSpace = " ".repeat(level * indent)
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let alignIndent = 0
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Object.entries(node).forEach(([key,value],index)=>{
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const isLastItem = index ===length-1
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alignIndent = Math.max(getStringWidth(escape(key)),alignIndent)
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let item = [`${indentSpace}"${escape(key)}"`,value]
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if(Array.isArray(value) || isPlainObject(value)){
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item[1] = nodeToString(value, level,isLastItem)
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}else if(typeof(value)==="string"){
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item[1] = `"${escape(value)}"`
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}else if(typeof(value)==="number"){
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item[1] = `${value.toString()}`
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}else if(typeof(value)==="boolean"){
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item[1] = `${value.toString()}`
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}
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// 如果最后一项
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if(!isLastItem){
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item[1] = item[1]+","
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}else{
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item[1] = item[1]+"\n"
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}
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results.push(item)
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})
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endChar =" ".repeat((level-1) * indent) + "}"
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return beginChar + results.map(item=>{
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if(alignKey){
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return `${item[0]}${" ".repeat(alignIndent-getStringWidth(item[0].trim())+2)}: ${item[1]}`
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}else{
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return `${item[0]}: ${item[1]}`
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}
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}).join("\n") + endChar
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}
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}
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return nodeToString(obj,0,true)
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}
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module.exports = {
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objectStringify,
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escape,
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escape2,
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unescape
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}
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