Update RuleAnalyzer.kt

修正匹配js代码的平衡组
pull/1121/head
bushixuanqi 3 years ago committed by GitHub
parent c5ed3b1702
commit efe728d6b7
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  1. 98
      app/src/main/java/io/legado/app/model/analyzeRule/RuleAnalyzer.kt

@ -95,14 +95,16 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
fun chompJsBalanced(innerType:Boolean = true,startPos:Int = pos): Boolean {
var pos = startPos //声明变量记录临时处理位置
var bracketsDepth = 0 //[]嵌套深度
var depth = 0 //{}嵌套深度
var depthX = 0 //[]嵌套深度
var balanced = false //平衡状态
var inSingleQuote = false //单引号
var inDoubleQuote = false //双引号
var inOtherQuote = false //js原始字串分隔字符
var inRegex = false //正则
var inCommit = false //单行注释
var inCommits = false //多行注释
var commit= false //是否为注释,不分单行注释还是多行注释
val start:String
val end:String
@ -110,64 +112,62 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
if(innerType){
start = "{{"
end = "}}"
endChar = '}'
end = "}"
}else{
start = "<js>"
end = "</js>"
endChar = '<'
end = "/js>"
}
pos += start.length //跳过起始字符串
do {
while(true){
if (pos == queue.length) break
var c = queue[pos++]
if (c != '\\') { //非转义字符
if (c == '\'' && !inCommits && !inCommit && !inRegex && !inDoubleQuote && !inOtherQuote) inSingleQuote =
if(c == ESC) {//跳过转义字符序列
pos++
continue
}
if(commit)when (c) {
'/' -> inCommit = true //匹配单行注释起点
'*' -> inCommits = true //匹配多行注释起点
else -> commit = false
}
if (c == '\'' && !commit && !inDoubleQuote && !inOtherQuote) inSingleQuote =
!inSingleQuote //匹配具有语法功能的单引号
else if (c == '"' && !inCommits && !inCommit && !inRegex && !inSingleQuote && !inOtherQuote) inDoubleQuote =
else if (c == '"' && !commit && !inSingleQuote && !inOtherQuote) inDoubleQuote =
!inDoubleQuote //匹配具有语法功能的双引号
else if (c == '`' && !inCommits && !inCommit && !inRegex && !inSingleQuote && !inDoubleQuote) inOtherQuote =
else if (c == '`' && !commit && !inSingleQuote && !inDoubleQuote) inOtherQuote =
!inOtherQuote //匹配具有语法功能的'`'
else if (c == '/' && !inCommits && !inCommit && !inRegex && !inSingleQuote && !inDoubleQuote && !inOtherQuote) { //匹配注释或正则起点
c = queue[pos++]
when (c) {
'/' -> inCommit = true //匹配单行注释起点
'*' -> inCommits = true //匹配多行注释起点
else -> inRegex = true //匹配正则起点
}
} else if (inCommits) { //匹配多行注释终点
pos = queue.indexOf("*/", pos) //跳过多行注释
if(pos == -1)break //没有终点,语法出错,跳出
continue
} else if (inRegex) { //正则的终点或[]平衡
when (c) {
'/' -> inRegex = false//匹配正则终点
//为了保证当open为( 且 close 为 )时,正则中[(]或[)]的合法性。故对[]这对在任何规则中都平衡的成对符号做匹配。
// 注:正则里[(]、[)]、[{]、[}]都是合法的,所以只有[]必须平衡。
'[' -> bracketsDepth++ //开始嵌套一层[]
']' -> bracketsDepth-- //闭合一层嵌套[]
}
} else if (c == '\n') inCommit = false //单行注释终点
else if (c == '/' && !commit && !inSingleQuote && !inDoubleQuote && !inOtherQuote) commit = true //可能是注释
else if (inCommits) { //匹配多行注释终点
pos = queue.indexOf("*/", pos) //跳过多行注释
if(pos == -1)break //没有终点,语法出错,跳出
continue
if (inCommits || inCommit || inRegex || inSingleQuote || inDoubleQuote || inOtherQuote) continue //语法单元未匹配结束,直接进入下个循环
}else if (c == '\n') inCommit = false //单行注释终点
if( c == endChar && queue.regionMatches(pos, end, 0, end.length)) {
this.pos = pos
return true
}
} else pos++
if (commit || inSingleQuote || inDoubleQuote || inOtherQuote) continue //语法单元未匹配结束,直接进入下个循环
} while (bracketsDepth > 0) //拉出全部符合js语法的字段
if(c == '[')depthX++
else if(c == ']')depthX--
else if(depth == 0){ //正则的[]中的{}不需要平衡,非正则的[]中的{}也无需考虑平衡
if(c == '{')depth++
else if(c == '}')depth--
}
balanced = depthX <1 && depth<1
if(!balanced)continue
if(c == endChar && queue.regionMatches(pos, end, 0, end.length)) {
this.pos = pos
return true
}
}
return false
}
/**
@ -311,7 +311,7 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
val next = if (queue[pos] == '[') ']' else ')' //平衡组末尾字符
if (!chompBalanced(queue[pos], next)) throw Error(
queue.substring(0,start) + "后未平衡"
queue.substring(0,start) + "后未平衡"
) //拉出一个筛选器,不平衡则报错
} while (end > pos)
@ -368,7 +368,7 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
val next = if (queue[pos] == '[') ']' else ')' //平衡组末尾字符
if (!chompBalanced(queue[pos], next)) throw Error(
queue.substring(0,start) + "后未平衡"
queue.substring(0,start) + "后未平衡"
) //拉出一个筛选器,不平衡则报错
} while (end > pos)
@ -391,10 +391,10 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
*
* */
fun innerRule(
inner: String,
startStep: Int = 1,
endStep: Int = 1,
fr: (String) -> String?
inner: String,
startStep: Int = 1,
endStep: Int = 1,
fr: (String) -> String?
): String {
val st = StringBuilder()
@ -422,7 +422,7 @@ class RuleAnalyzer(data: String, code: Boolean = false) {
*
* */
fun innerJsRule(
fr: (String) -> String?
fr: (String) -> String?
): String {
val st = StringBuilder()

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