编辑规则时对部分规则进行简单补全。

* APP内编写规则时，对由XPath|JSOUP|CSS组成的规则进行简单的默认补全。
* 对需求文本的获取text
* 对需求文本的img元素(以img结尾)的获取alt属性
* 对需求链接的获取href属性
* 对需求图片的获取src属性
* 详情页预处理存在js/json/正则的不对详情页规则进行补全
* 多条规则只补全最后一条规则
* 书源编辑页点击调试/保存时补全开始生效，注意:不改变编辑框内容显示，保存后再次编辑可查看修改后的规则，方便调试时快速修改规则

app/src/main/java/io/legado/app/help/ruleComplete.kt

@@ -0,0 +1,46 @@
+package io.legado.app.help
+
+// 补全时忽略匹配规则
+val completeIgnore=Regex("""##|@js:|<js>|@Json:|\$.|(text|ownText|textNodes|href|content|html|alt|all|value|src)(\(\)|##.*)?\s*$""")
+// 匹配从图片获取信息的规则
+val imgComplete=Regex("""(?<=(tag\.|[\+/@~>\| \&]))img[@/]text(\(\))?$|^img[@/]text(\(\))?$""",RegexOption.IGNORE_CASE)
+// 补全时忽略匹配的规则(仅对详情页预处理规则生效)
+val completeIgnorePreRule=Regex("""^:|##|@js:|<js>|@Json:|\$.""")
+/**
+ * 对简单规则进行补全，简化部分书源规则的编写
+ * 该方法仅对对JSOUP/XPath/CSS规则生效
+ * @author 希弥
+ * @return 补全后的规则 或 原规则
+ * @param rules 需要补全的规则
+ * @param preRule 预处理规则
+ *  用于分析详情页预处理规则
+ * @param type 补全结果的类型，可选的值有:
+ *  1 文字(默认)
+ *  2 链接
+ *  3 图片
+ */
+fun ruleComplete(rule:String?,preRule:String?="",type:Int=1):String?{
+  if (rule.isNullOrEmpty()||rule.contains(completeIgnore)||preRule?.contains(completeIgnorePreRule)?:false){
+    return rule
+  }
+  var textRule:String
+  var linkRule:String
+  var imgRule:String
+  if (rule.contains(Regex("/[^@]+$"))){
+    textRule="/text()"
+    linkRule="/@href"
+    imgRule="/@src"
+  }else{
+    textRule="@text"
+    linkRule="@href"
+    imgRule="@src"
+  }
+  var ret:String=rule
+  when(type){
+    1 -> ret = rule.replace(Regex("$"),textRule).replace(imgComplete,"img@alt")
+    2 -> ret = rule.replace(Regex("$"),linkRule)
+    3 -> ret = rule.replace(Regex("$"),imgRule)
+  }
+  return ret
+}
+

app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt

@@ -21,6 +21,7 @@ import io.legado.app.data.entities.BookSource
 import io.legado.app.data.entities.rule.*
 import io.legado.app.databinding.ActivityBookSourceEditBinding
 import io.legado.app.help.LocalConfig
+import io.legado.app.help.ruleComplete
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.theme.backgroundColor
@@ -327,63 +328,63 @@ class BookSourceEditActivity :
                 "searchUrl" -> source.searchUrl = it.value
                 "checkKeyWord" -> searchRule.checkKeyWord = it.value
                 "bookList" -> searchRule.bookList = it.value
-                "name" -> searchRule.name = it.value
-                "author" -> searchRule.author = it.value
-                "kind" -> searchRule.kind = it.value
-                "intro" -> searchRule.intro = it.value
-                "updateTime" -> searchRule.updateTime = it.value
-                "wordCount" -> searchRule.wordCount = it.value
-                "lastChapter" -> searchRule.lastChapter = it.value
-                "coverUrl" -> searchRule.coverUrl = it.value
-                "bookUrl" -> searchRule.bookUrl = it.value
+                "name" -> searchRule.name = ruleComplete(it.value)
+                "author" -> searchRule.author = ruleComplete(it.value)
+                "kind" -> searchRule.kind = ruleComplete(it.value)
+                "intro" -> searchRule.intro = ruleComplete(it.value)
+                "updateTime" -> searchRule.updateTime = ruleComplete(it.value)
+                "wordCount" -> searchRule.wordCount = ruleComplete(it.value)
+                "lastChapter" -> searchRule.lastChapter = ruleComplete(it.value)
+                "coverUrl" -> searchRule.coverUrl = ruleComplete(it.value,type=3)
+                "bookUrl" -> searchRule.bookUrl = ruleComplete(it.value,type=2)
             }
         }
         findEntities.forEach {
             when (it.key) {
                 "exploreUrl" -> source.exploreUrl = it.value
                 "bookList" -> exploreRule.bookList = it.value
-                "name" -> exploreRule.name = it.value
-                "author" -> exploreRule.author = it.value
-                "kind" -> exploreRule.kind = it.value
-                "intro" -> exploreRule.intro = it.value
-                "updateTime" -> exploreRule.updateTime = it.value
-                "wordCount" -> exploreRule.wordCount = it.value
-                "lastChapter" -> exploreRule.lastChapter = it.value
-                "coverUrl" -> exploreRule.coverUrl = it.value
-                "bookUrl" -> exploreRule.bookUrl = it.value
+                "name" -> exploreRule.name = ruleComplete(it.value)
+                "author" -> exploreRule.author = ruleComplete(it.value)
+                "kind" -> exploreRule.kind = ruleComplete(it.value)
+                "intro" -> exploreRule.intro = ruleComplete(it.value)
+                "updateTime" -> exploreRule.updateTime = ruleComplete(it.value)
+                "wordCount" -> exploreRule.wordCount = ruleComplete(it.value)
+                "lastChapter" -> exploreRule.lastChapter = ruleComplete(it.value)
+                "coverUrl" -> exploreRule.coverUrl = ruleComplete(it.value,type=3)
+                "bookUrl" -> exploreRule.bookUrl = ruleComplete(it.value,type=2)
             }
         }
         infoEntities.forEach {
             when (it.key) {
-                "init" -> bookInfoRule.init = it.value
-                "name" -> bookInfoRule.name = it.value
-                "author" -> bookInfoRule.author = it.value
-                "kind" -> bookInfoRule.kind = it.value
-                "intro" -> bookInfoRule.intro = it.value
-                "updateTime" -> bookInfoRule.updateTime = it.value
-                "wordCount" -> bookInfoRule.wordCount = it.value
-                "lastChapter" -> bookInfoRule.lastChapter = it.value
-                "coverUrl" -> bookInfoRule.coverUrl = it.value
-                "tocUrl" -> bookInfoRule.tocUrl = it.value
+                "init" -> bookInfoRule.init = it.value ?: ""
+                "name" -> bookInfoRule.name = ruleComplete(it.value,bookInfoRule.init)
+                "author" -> bookInfoRule.author = ruleComplete(it.value,bookInfoRule.init)
+                "kind" -> bookInfoRule.kind = ruleComplete(it.value,bookInfoRule.init)
+                "intro" -> bookInfoRule.intro = ruleComplete(it.value,bookInfoRule.init)
+                "updateTime" -> bookInfoRule.updateTime = ruleComplete(it.value,bookInfoRule.init)
+                "wordCount" -> bookInfoRule.wordCount = ruleComplete(it.value,bookInfoRule.init)
+                "lastChapter" -> bookInfoRule.lastChapter = ruleComplete(it.value,bookInfoRule.init)
+                "coverUrl" -> bookInfoRule.coverUrl = ruleComplete(it.value,bookInfoRule.init,3)
+                "tocUrl" -> bookInfoRule.tocUrl = ruleComplete(it.value,bookInfoRule.init,2)
                 "canReName" -> bookInfoRule.canReName = it.value
             }
         }
         tocEntities.forEach {
             when (it.key) {
                 "chapterList" -> tocRule.chapterList = it.value
-                "chapterName" -> tocRule.chapterName = it.value
-                "chapterUrl" -> tocRule.chapterUrl = it.value
+                "chapterName" -> tocRule.chapterName = ruleComplete(it.value)
+                "chapterUrl" -> tocRule.chapterUrl = ruleComplete(it.value,type=2)
                 "isVolume" -> tocRule.isVolume = it.value
                 "updateTime" -> tocRule.updateTime = it.value
                 "isVip" -> tocRule.isVip = it.value
                 "isPay" -> tocRule.isPay = it.value
-                "nextTocUrl" -> tocRule.nextTocUrl = it.value
+                "nextTocUrl" -> tocRule.nextTocUrl = ruleComplete(it.value,type=2)
             }
         }
         contentEntities.forEach {
             when (it.key) {
-                "content" -> contentRule.content = it.value
-                "nextContentUrl" -> contentRule.nextContentUrl = it.value
+                "content" -> contentRule.content = ruleComplete(it.value)
+                "nextContentUrl" -> contentRule.nextContentUrl = ruleComplete(it.value,type=2)
                 "webJs" -> contentRule.webJs = it.value
                 "sourceRegex" -> contentRule.sourceRegex = it.value
                 "replaceRegex" -> contentRule.replaceRegex = it.value