Update RuleAnalyzer.kt

简化规则
pull/1104/head
bushixuanqi 3 years ago committed by GitHub
parent 0dc8604b6c
commit 514dbf4ff9
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  1. 44
      app/src/main/java/io/legado/app/model/analyzeRule/RuleAnalyzer.kt

@ -151,7 +151,7 @@ class RuleAnalyzer(data: String) {
else -> null else -> null
} }
} ): Boolean { } ): Boolean {
start = pos val pos = pos //声明变量记录临时处理位置
var depth = 0 //嵌套深度 var depth = 0 //嵌套深度
var bracketsDepth = 0 //[]嵌套深度 var bracketsDepth = 0 //[]嵌套深度
@ -164,13 +164,13 @@ class RuleAnalyzer(data: String) {
do { do {
if (isEmpty) break if (isEmpty) break
var c = consume() var c = queue[pos++]
if (c != '\\') { //非转义字符 if (c != '\\') { //非转义字符
if (c == '\'' && !commits && !commit && !regex && !inDoubleQuote && !inOtherQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号 if (c == '\'' && !commits && !commit && !regex && !inDoubleQuote && !inOtherQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号
else if (c == '"' && !commits && !commit && !regex && !inSingleQuote && !inOtherQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号 else if (c == '"' && !commits && !commit && !regex && !inSingleQuote && !inOtherQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号
else if (c == '`' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote) inOtherQuote = !inOtherQuote //匹配具有语法功能的'`' else if (c == '`' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote) inOtherQuote = !inOtherQuote //匹配具有语法功能的'`'
else if (c == '/' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote && !inOtherQuote) { //匹配注释或正则起点 else if (c == '/' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote && !inOtherQuote) { //匹配注释或正则起点
c = consume() c = queue[pos++]
when(c){ when(c){
'/'->commit=true //匹配单行注释起点 '/'->commit=true //匹配单行注释起点
'*'->commits=true //匹配多行注释起点 '*'->commits=true //匹配多行注释起点
@ -178,7 +178,7 @@ class RuleAnalyzer(data: String) {
} }
} }
else if(commits && c == '*') { //匹配多行注释终点 else if(commits && c == '*') { //匹配多行注释终点
c = consume() c = queue[pos++]
if(c == '/')commits = false if(c == '/')commits = false
} }
else if(regex && c == '/') { //正则的终点或[]平衡 else if(regex && c == '/') { //正则的终点或[]平衡
@ -200,19 +200,20 @@ class RuleAnalyzer(data: String) {
if (fn) depth++ else depth-- //嵌套或者闭合 if (fn) depth++ else depth-- //嵌套或者闭合
}else { //转义字符 }else { //转义字符
var next = consume() //拉出被转义字符 var next = queue[pos++] //拉出被转义字符
if(commit && next == 'n') commit = false //匹配单行注释终点。当前为\,下个为n,表示换行 if(commit && next == 'n') commit = false //匹配单行注释终点。当前为\,下个为n,表示换行
else if (!commits && !commit && next == '\\') { else if (!commits && !commit && next == '\\') {
consume() //当前为\,下个为\,双重转义中"\\"表示转义字符本身,根据if条件"\\"字串不在注释中,则只能在字串或正则中 queue[pos++] //当前为\,下个为\,双重转义中"\\"表示转义字符本身,根据if条件"\\"字串不在注释中,则只能在字串或正则中
next = consume() //拉出下个字符,因为在双重转义的字串或正则中,类似于 \\/ 这样的结构才是转义结构 next = queue[pos++] //拉出下个字符,因为在双重转义的字串或正则中,类似于 \\/ 这样的结构才是转义结构
if(next == '\\')consume() //若为转义字符则继续拉出,因为双重转义中转义字符成对存在,即 \\\\ if(next == '\\')queue[pos++] //若为转义字符则继续拉出,因为双重转义中转义字符成对存在,即 \\\\
} }
} }
} while (depth > 0 || bracketsDepth >0) //拉出全部符合js语法的字段 } while (depth > 0 || bracketsDepth >0) //拉出全部符合js语法的字段
if(depth > 0 || bracketsDepth >0) start = pos return if(depth > 0 || bracketsDepth > 0) false else {
this.pos = pos //同步位置
return pos > start true
}
} }
/** /**
@ -220,7 +221,7 @@ class RuleAnalyzer(data: String) {
*/ */
fun chompRuleBalanced(open: Char = '[', close: Char = ']',f: ((Char) ->Boolean?)? = null ): Boolean { fun chompRuleBalanced(open: Char = '[', close: Char = ']',f: ((Char) ->Boolean?)? = null ): Boolean {
val start = pos //声明临时变量记录本次起始位置,不更改类的start val pos = pos //声明临时变量记录匹配位置,匹配成功后才同步到类的pos
var depth = 0 //嵌套深度 var depth = 0 //嵌套深度
var otherDepth = 0 //其他对称符合嵌套深度 var otherDepth = 0 //其他对称符合嵌套深度
@ -230,7 +231,7 @@ class RuleAnalyzer(data: String) {
do { do {
if (isEmpty) break if (isEmpty) break
val c = consume() val c = queue[pos++]
if (c != ESC) { //非转义字符 if (c != ESC) { //非转义字符
if (c == '\'' && !inDoubleQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号 if (c == '\'' && !inDoubleQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号
else if (c == '"' && !inSingleQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号 else if (c == '"' && !inSingleQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号
@ -245,20 +246,19 @@ class RuleAnalyzer(data: String) {
} }
}else { //转义字符 }else { //转义字符
var next = consume() //拉出被转义字符,匹配\/、\"、\'等 var next = queue[pos++] //拉出被转义字符,匹配\/、\"、\'等
if (next == ESC) { if (next == ESC) {
consume() //当前为\,下个为\,双重转义中"\\"表示转义字符本身,根据语法特征当前字段在字串或正则中 queue[pos++] //当前为\,下个为\,双重转义中"\\"表示转义字符本身,根据语法特征当前字段在字串或正则中
next = consume() //拉出下个字符,因为在双重转义的字串或正则中,类似于 \\/ 这样的结构才是转义结构 next = queue[pos++] //拉出下个字符,因为在双重转义的字串或正则中,类似于 \\/ 这样的结构才是转义结构
if(next == ESC)consume() //若为转义字符则继续拉出,因为双重转义中转义字符成对存在,即 \\\\ if(next == ESC)queue[pos++] //若为转义字符则继续拉出,因为双重转义中转义字符成对存在,即 \\\\
} }
} }
} while (depth > 0 || otherDepth > 0) //拉出一个平衡字串 } while (depth > 0 || otherDepth > 0) //拉出一个平衡字串
return if(depth > 0 || otherDepth > 0) { return if(depth > 0 || otherDepth > 0) false else {
pos = start //匹配失败,位置回退 this.pos = pos //同步位置
false true
} else true }
} }
/** /**

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