Fix #3546: 修复游戏崩溃窗口乱码的问题 (#3867)

Author: Glavo

HMCL/src/main/java/org/jackhuang/hmcl/ui/GameCrashWindow.java

@@ -142,7 +142,7 @@ private void analyzeCrashReport() {
 
             String log;
             try {
-                log = FileUtils.readText(latestLog);
+                log = FileUtils.readTextMaybeNativeEncoding(latestLog);
             } catch (IOException e) {
                 LOG.warning("Failed to read logs/latest.log", e);
                 return pair(new HashSet<CrashReportAnalyzer.Result>(), new HashSet<String>());

HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/FileUtils.java

@@ -17,6 +17,8 @@
  */
 package org.jackhuang.hmcl.util.io;
 
+import org.glavo.chardet.DetectedCharset;
+import org.glavo.chardet.UniversalDetector;
 import org.jackhuang.hmcl.util.Lang;
 import org.jackhuang.hmcl.util.StringUtils;
 import org.jackhuang.hmcl.util.function.ExceptionalConsumer;
@@ -128,6 +130,24 @@ public static String readText(Path file, Charset charset) throws IOException {
         return new String(Files.readAllBytes(file), charset);
     }
 
+    public static String readTextMaybeNativeEncoding(Path file) throws IOException {
+        byte[] bytes = Files.readAllBytes(file);
+
+        if (OperatingSystem.NATIVE_CHARSET == UTF_8)
+            return new String(bytes, UTF_8);
+
+        UniversalDetector detector = new UniversalDetector();
+        detector.handleData(bytes);
+        detector.dataEnd();
+
+        DetectedCharset detectedCharset = detector.getDetectedCharset();
+        if (detectedCharset != null && detectedCharset.isSupported()
+                && (detectedCharset == DetectedCharset.UTF_8 || detectedCharset == DetectedCharset.US_ASCII))
+            return new String(bytes, UTF_8);
+        else
+            return new String(bytes, OperatingSystem.NATIVE_CHARSET);
+    }
+
     /**
      * Write plain text to file. Characters are encoded into bytes using UTF-8.
      * <p>