Java 类com.intellij.lang.properties.charset.Native2AsciiCharset 实例源码

@Override
@Nullable
public ProblemDescriptor[] checkFile(@NotNull PsiFile file, @NotNull InspectionManager manager, boolean isOnTheFly) {
  if (InjectedLanguageManager.getInstance(file.getProject()).isInjectedFragment(file)) return null;
  if (!file.isPhysical()) return null;
  FileViewProvider viewProvider = file.getViewProvider();
  if (viewProvider.getBaseLanguage() != file.getLanguage()) return null;
  VirtualFile virtualFile = file.getVirtualFile();
  if (virtualFile == null) return null;
  if (!virtualFile.isInLocalFileSystem()) return null;
  CharSequence text = viewProvider.getContents();
  Charset charset = LoadTextUtil.extractCharsetFromFileContent(file.getProject(), virtualFile, text);

  // no sense in checking transparently decoded file: all characters there are already safely encoded
  if (charset instanceof Native2AsciiCharset) return null;

  List<ProblemDescriptor> descriptors = new SmartList<ProblemDescriptor>();
  boolean ok = checkFileLoadedInWrongEncoding(file, manager, isOnTheFly, virtualFile, charset, descriptors);
  if (ok) {
    checkIfCharactersWillBeLostAfterSave(file, manager, isOnTheFly, text, charset, descriptors);
  }

  return descriptors.toArray(new ProblemDescriptor[descriptors.size()]);
}

@Override
@Nullable
public ProblemDescriptor[] checkFile(@NotNull PsiFile file, @NotNull InspectionManager manager, boolean isOnTheFly) {
  if (InjectedLanguageManager.getInstance(file.getProject()).isInjectedFragment(file)) return null;
  if (!file.isPhysical()) return null;
  if (file.getViewProvider().getBaseLanguage() != file.getLanguage()) return null;
  VirtualFile virtualFile = file.getVirtualFile();
  if (virtualFile == null) return null;
  if (virtualFile.getFileSystem() != LocalFileSystem.getInstance()
      // tests
      && virtualFile.getFileSystem() != TempFileSystem.getInstance()) return null;
  String text = file.getText();
  Charset charset = LoadTextUtil.extractCharsetFromFileContent(file.getProject(), virtualFile, text);

  // no sense in checking transparently decoded file: all characters there are already safely encoded
  if (charset instanceof Native2AsciiCharset) return null;

  List<ProblemDescriptor> descriptors = new SmartList<ProblemDescriptor>();
  boolean ok = checkFileLoadedInWrongEncoding(file, manager, isOnTheFly, text, virtualFile, charset, descriptors);
  if (ok) {
    checkIfCharactersWillBeLostAfterSave(file, manager, isOnTheFly, text, charset, descriptors);
  }

  return descriptors.toArray(new ProblemDescriptor[descriptors.size()]);
}

@Override
@Nullable
public ProblemDescriptor[] checkFile(@Nonnull PsiFile file, @Nonnull InspectionManager manager, boolean isOnTheFly) {
  if (InjectedLanguageManager.getInstance(file.getProject()).isInjectedFragment(file)) return null;
  if (!file.isPhysical()) return null;
  FileViewProvider viewProvider = file.getViewProvider();
  if (viewProvider.getBaseLanguage() != file.getLanguage()) return null;
  VirtualFile virtualFile = file.getVirtualFile();
  if (virtualFile == null) return null;
  if (!virtualFile.isInLocalFileSystem()) return null;
  CharSequence text = viewProvider.getContents();
  Charset charset = LoadTextUtil.extractCharsetFromFileContent(file.getProject(), virtualFile, text);

  // no sense in checking transparently decoded file: all characters there are already safely encoded
  if (charset instanceof Native2AsciiCharset) return null;

  List<ProblemDescriptor> descriptors = new SmartList<ProblemDescriptor>();
  boolean ok = checkFileLoadedInWrongEncoding(file, manager, isOnTheFly, virtualFile, charset, descriptors);
  if (ok) {
    checkIfCharactersWillBeLostAfterSave(file, manager, isOnTheFly, text, charset, descriptors);
  }

  return descriptors.toArray(new ProblemDescriptor[descriptors.size()]);
}

@NotNull
public static Charset detectCharset(@NotNull VirtualFile virtualFile, @NotNull byte[] content, @NotNull FileType fileType) {
  Charset charset = null;

  Trinity<Charset,CharsetToolkit.GuessedEncoding, byte[]> guessed = guessFromContent(virtualFile, content, content.length);
  if (guessed != null && guessed.first != null) {
    charset = guessed.first;
  }
  else {
    String charsetName = fileType.getCharset(virtualFile, content);

    if (charsetName == null) {
      Charset specifiedExplicitly = EncodingRegistry.getInstance().getEncoding(virtualFile, true);
      if (specifiedExplicitly != null) {
        charset = specifiedExplicitly;
      }
    }
    else {
      charset = CharsetToolkit.forName(charsetName);
    }
  }

  if (charset == null) {
    charset = EncodingRegistry.getInstance().getDefaultCharset();
  }
  if (fileType.getName().equals("Properties") && EncodingRegistry.getInstance().isNative2Ascii(virtualFile)) {
    charset = Native2AsciiCharset.wrap(charset);
  }
  virtualFile.setCharset(charset);
  return charset;
}

private static Charset detectCharset(@NotNull VirtualFile virtualFile, @NotNull byte[] content) {
  Charset charset = null;

  Trinity<Charset,CharsetToolkit.GuessedEncoding, byte[]> guessed = guessFromContent(virtualFile, content, content.length);
  if (guessed != null && guessed.first != null) {
    charset = guessed.first;
  }
  else {
    FileType fileType = virtualFile.getFileType();
    String charsetName = fileType.getCharset(virtualFile, content);

    if (charsetName == null) {
      Charset specifiedExplicitly = EncodingRegistry.getInstance().getEncoding(virtualFile, true);
      if (specifiedExplicitly != null) {
        charset = specifiedExplicitly;
      }
    }
    else {
      charset = CharsetToolkit.forName(charsetName);
    }
  }

  charset = charset == null ? EncodingRegistry.getInstance().getDefaultCharset() : charset;
  if (EncodingRegistry.getInstance().isNative2Ascii(virtualFile)) {
    charset = Native2AsciiCharset.wrap(charset);
  }
  virtualFile.setCharset(charset);
  return charset;
}