@Override
@Nullable
public Document getDocument(@NotNull final VirtualFile file) {
DocumentEx document = (DocumentEx) getCachedDocument(file);
if (document == null) {
if (file.isDirectory()
|| isBinaryWithoutDecompiler(file)
|| SingleRootFileViewProvider.isTooLargeForContentLoading(file)) {
return null;
}
final CharSequence text = LoadTextUtil.loadText(file);
synchronized (lock) {
document = (DocumentEx) getCachedDocument(file);
if (document != null) return document; // Double checking
document = (DocumentEx) createDocument(text);
document.setModificationStamp(file.getModificationStamp());
final FileType fileType = file.getFileType();
document.setReadOnly(!file.isWritable() || fileType.isBinary());
file.putUserData(DOCUMENT_KEY, new WeakReference<Document>(document));
document.putUserData(FILE_KEY, file);
if (!(file instanceof LightVirtualFile
|| file.getFileSystem() instanceof DummyFileSystem)) {
document.addDocumentListener(
new DocumentAdapter() {
@Override
public void documentChanged(DocumentEvent e) {
final Document document = e.getDocument();
myUnsavedDocuments.add(document);
final Runnable currentCommand =
CommandProcessor.getInstance().getCurrentCommand();
Project project =
currentCommand == null
? null
: CommandProcessor.getInstance().getCurrentCommandProject();
String lineSeparator = CodeStyleFacade.getInstance(project).getLineSeparator();
document.putUserData(LINE_SEPARATOR_KEY, lineSeparator);
// avoid documents piling up during batch processing
if (areTooManyDocumentsInTheQueue(myUnsavedDocuments)) {
saveAllDocumentsLater();
}
}
});
}
}
myMultiCaster.fileContentLoaded(file, document);
}
return document;
}
private static boolean isSaveNeeded(@NotNull Document document, @NotNull VirtualFile file)
throws IOException {
if (file.getFileType().isBinary()
|| document.getTextLength() > 1000 * 1000) { // don't compare if the file is too big
return true;
}
byte[] bytes = file.contentsToByteArray();
CharSequence loaded = LoadTextUtil.getTextByBinaryPresentation(bytes, file, false, false);
return !Comparing.equal(document.getCharsSequence(), loaded);
}
@Override
public boolean requestWriting(@NotNull Document document, Project project) {
final VirtualFile file = getInstance().getFile(document);
if (project != null && file != null && file.isValid()) {
return !file.getFileType().isBinary()
&& ReadonlyStatusHandler.ensureFilesWritable(project, file);
}
if (document.isWritable()) {
return true;
}
document.fireReadOnlyModificationAttempt();
return false;
}
private static boolean isBinaryWithoutDecompiler(VirtualFile file) {
final FileType ft = file.getFileType();
return ft.isBinary() && BinaryFileTypeDecompilers.INSTANCE.forFileType(ft) == null;
}