Feature/regex and protocol search (#5364)

* add windows compile options

* add regex search and search from protocol function(#5354)

* Delete compile-hevtun.bat

* Delete fix_headers.bat

* Extract matchesPattern to extension

---------

Co-authored-by: 2dust <31833384+2dust@users.noreply.github.com>

V2rayNG/app/src/main/java/com/v2ray/ang/extension/_Ext.kt

@@ -189,4 +189,15 @@ fun String.concatUrl(vararg paths: String): String {
     }
 
     return builder.toString()
+}
+
+/**
+ * Helper function to match text either by Regex or literal string.
+ */
+fun String.matchesPattern(regex: Regex?, keyword: String?, ignoreCase: Boolean = true): Boolean {
+    if (keyword.isNullOrEmpty()) {
+        return true
+    }
+    return regex?.containsMatchIn(this)
+        ?: this.contains(keyword, ignoreCase = ignoreCase)
 }

V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/MainViewModel.kt

@@ -19,6 +19,7 @@ import com.v2ray.ang.dto.ServersCache
 import com.v2ray.ang.dto.SubscriptionCache
 import com.v2ray.ang.dto.SubscriptionUpdateResult
 import com.v2ray.ang.dto.TestServiceMessage
+import com.v2ray.ang.extension.matchesPattern
 import com.v2ray.ang.extension.serializable
 import com.v2ray.ang.extension.toastError
 import com.v2ray.ang.extension.toastSuccess
@@ -35,6 +36,7 @@ import kotlinx.coroutines.cancelChildren
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.util.Collections
+import java.util.regex.PatternSyntaxException
 
 class MainViewModel(application: Application) : AndroidViewModel(application) {
     private var serverList = mutableListOf<String>() // MmkvManager.decodeServerList()
@@ -117,7 +119,12 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
     @Synchronized
     fun updateCache() {
         serversCache.clear()
-        val kw = keywordFilter.trim().lowercase()
+        val kw = keywordFilter.trim()
+        val searchRegex = try {
+            if (kw.isNotEmpty()) Regex(kw, setOf(RegexOption.IGNORE_CASE)) else null
+        } catch (e: PatternSyntaxException) {
+            null // Fallback to literal search if regex is invalid
+        }
         for (guid in serverList) {
             val profile = MmkvManager.decodeServerConfig(guid) ?: continue
             if (kw.isEmpty()) {
@@ -125,11 +132,15 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                 continue
             }
 
-            val remarks = profile.remarks.lowercase()
-            val description = profile.description.orEmpty().lowercase()
-            val server = profile.server.orEmpty().lowercase()
-
-            if (remarks.contains(kw) || description.contains(kw) || server.contains(kw)) {
+            val remarks = profile.remarks
+            val description = profile.description.orEmpty()
+            val server = profile.server.orEmpty()
+            val protocol = profile.configType.name
+            if (remarks.matchesPattern(searchRegex, kw)
+                || description.matchesPattern(searchRegex, kw)
+                || server.matchesPattern(searchRegex, kw)
+                || protocol.matchesPattern(searchRegex, kw)
+            ) {
                 serversCache.add(ServersCache(guid, profile))
             }
         }
@@ -479,4 +490,4 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-}
+}