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@ -5,25 +5,23 @@ package io.legado.app.model.analyzeRule |
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class RuleAnalyzer(data: String, code: Boolean = false) { |
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class RuleAnalyzer(data: String, code: Boolean = false) { |
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private var queue: String = data //被处理字符串 |
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private var queue: String = data //被处理字符串 |
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private var pos = 0 //处理到的位置 |
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private var pos = 0 //当前处理到的位置 |
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private var rule = arrayOf<String>() |
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private var start = 0 //当前处理字段的开始 |
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private var startX = 0 //当前规则的开始 |
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private var start = 0 //每次处理字段的开始 |
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private var rule = arrayOf<String>() //分割出的规则列表 |
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private var startX = 0 //规则的开始 |
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private var innerStr: Boolean = false //true表示以平衡组的起点为规则起始,false表示不这样 |
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private var step: Int = 0 //分割字符的长度 |
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private var step: Int = 0 //分割字符的长度 |
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var elementsType = "" //当前分割字符串 |
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//设置平衡组函数,json或JavaScript时设置成chompCodeBalanced,否则为chompRuleBalanced |
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//设置平衡组函数,json或JavaScript时设置成chompCodeBalanced,否则为chompRuleBalanced |
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val chompBalanced = if (code) ::chompCodeBalanced else ::chompRuleBalanced |
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val chompBalanced = if (code) ::chompCodeBalanced else ::chompRuleBalanced |
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var elementsType = "" |
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//当前平衡字段 |
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//当前平衡字段 |
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fun currBalancedString( |
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fun currBalancedString( |
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stepStart: Int = 1, |
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stepStart: Int = 1, |
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stepEnd: Int = 1 |
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stepEnd: Int = 1 |
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): String { //stepStart平衡字符的起始分隔字串长度,stepEnd平衡字符的结束分隔字串长度 |
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): String { //stepStart平衡字符的起始分隔字串长度,stepEnd平衡字符的结束分隔字串长度 |
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return queue.substring(startX + stepStart, pos - stepEnd) //当前平衡字段 |
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return queue.substring(start + stepStart, pos - stepEnd) //当前平衡字段 |
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} |
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} |
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@ -41,13 +39,6 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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return queue.substring(start, pos) //当前拉取到的字段 |
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return queue.substring(start, pos) //当前拉取到的字段 |
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} |
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} |
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//剩余字串 |
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private fun remainingString(): String { |
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start = pos |
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pos = queue.length |
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return queue.substring(start) |
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} |
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/** |
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/** |
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* 是否已无剩余字符? |
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* 是否已无剩余字符? |
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* @return 若剩余字串中已无字符则返回true |
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* @return 若剩余字串中已无字符则返回true |
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@ -77,15 +68,13 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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* @param seq 分隔字符 **区分大小写** |
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* @param seq 分隔字符 **区分大小写** |
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* @return 是否找到相应字段。 |
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* @return 是否找到相应字段。 |
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*/ |
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*/ |
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fun consumeTo(seq: String, setStartPos: Boolean = true): Boolean { |
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fun consumeTo(seq: String): Boolean { |
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start = pos //将处理到的位置设置为规则起点 |
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if (setStartPos) start = pos //将处理到的位置设置为规则起点 |
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val offset = queue.indexOf(seq, pos) |
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val offset = queue.indexOf(seq, pos) |
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return if (offset != -1) { |
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return if (offset != -1) { |
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pos = offset |
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pos = offset |
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true |
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true |
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} else false |
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} else false |
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} |
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} |
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/** |
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/** |
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@ -203,7 +192,7 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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} |
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} |
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/** |
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/** |
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* 拉出一个代码平衡组,存在转义文本,没有实体字符,通常以{}作为模块 |
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* 拉出一个非内嵌代码平衡组,存在转义文本 |
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*/ |
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*/ |
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fun chompCodeBalanced(open: Char, close: Char): Boolean { |
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fun chompCodeBalanced(open: Char, close: Char): Boolean { |
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@ -237,7 +226,6 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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} while (depth > 0 || otherDepth > 0) //拉出一个平衡字串 |
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} while (depth > 0 || otherDepth > 0) //拉出一个平衡字串 |
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return if (depth > 0 || otherDepth > 0) false else { |
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return if (depth > 0 || otherDepth > 0) false else { |
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if (innerStr) startX = this.pos //内嵌规则起始 |
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this.pos = pos //同步位置 |
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this.pos = pos //同步位置 |
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true |
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true |
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} |
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} |
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@ -421,7 +409,6 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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} |
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} |
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/** |
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/** |
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* 替换内嵌规则 |
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* 替换内嵌规则 |
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* @param inner 起始标志,如{$. 或 {{ |
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* @param inner 起始标志,如{$. 或 {{ |
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@ -437,30 +424,26 @@ class RuleAnalyzer(data: String, code: Boolean = false) { |
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fr: (String) -> String? |
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fr: (String) -> String? |
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): String { |
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): String { |
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val start0 = pos //规则匹配前起点 |
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val startXS = pos //设置最初起点 |
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startX = pos //设置规则起点 |
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innerStr = true //设置平衡组以平衡组起点为规则起始点 |
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val st = StringBuilder() |
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val st = StringBuilder() |
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while (!isEmpty && consumeTo(inner)) { //拉取成功返回true,ruleAnalyzes里的字符序列索引变量pos后移相应位置,否则返回false,且isEmpty为true |
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while (consumeTo(inner)) { //拉取成功返回true,ruleAnalyzes里的字符序列索引变量pos后移相应位置,否则返回false,且isEmpty为true |
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val posPre = pos //记录上次结束位置 |
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if (chompCodeBalanced('{', '}')) { |
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if (chompBalanced('{', '}')) { |
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val frv = fr(currBalancedString(startStep, endStep)) |
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val frv = fr(currBalancedString(startStep, endStep)) |
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if (frv != null) { |
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if (frv != null) { |
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st.append(queue.substring(start, posPre) + frv) //压入内嵌规则前的内容,及内嵌规则解析得到的字符串 |
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st.append(queue.substring(startX, start) + frv) //压入内嵌规则前的内容,及内嵌规则解析得到的字符串 |
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startX = pos //记录下次规则起点 |
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continue //获取内容成功,继续选择下个内嵌规则 |
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continue //获取内容成功,继续选择下个内嵌规则 |
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} |
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} |
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} |
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} |
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pos += inner.length //拉出字段不平衡,inner只是个普通字串,跳到此inner后继续匹配 |
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pos += inner.length //拉出字段不平衡,inner只是个普通字串,跳到此inner后继续匹配 |
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} |
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} |
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//匹配前起点与当前规则起点相同,证明无替换成功的内嵌规则,返回空字符串。否则返回替换后的字符串 |
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//最初起点与当前规则起点相同,证明无替换成功的内嵌规则,返回空字符串。否则返回替换后的字符串 |
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return if (start0 == start) "" else { |
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return if (startX == startXS) "" else { |
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st.append(remainingString()) //压入剩余字符串 |
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st.append(queue.substring(pos)) //压入剩余字符串 |
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st.toString() |
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st.toString() |
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} |
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} |
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} |
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} |
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