Java Code Examples for org.eclipse.core.filebuffers.ITextFileBuffer#getDocument()

/**
 * Returns an {@link IDocument} for the given {@link IFile}.
 *
 * @param file an {@link IFile}
 * @return a document with the contents of the file,
 * or <code>null</code> if the file can not be opened.
 */
public static IDocument toDocument(IFile file) {
	if (file != null && file.isAccessible()) {
		IPath path = file.getFullPath();
		ITextFileBufferManager fileBufferManager = FileBuffers.getTextFileBufferManager();
		LocationKind kind = LocationKind.IFILE;
		try {
			fileBufferManager.connect(path, kind, new NullProgressMonitor());
			ITextFileBuffer fileBuffer = fileBufferManager.getTextFileBuffer(path, kind);
			if (fileBuffer != null) {
				return fileBuffer.getDocument();
			}
		} catch (CoreException e) {
			JavaLanguageServerPlugin.logException("Failed to convert "+ file +"  to an IDocument", e);
		} finally {
			try {
				fileBufferManager.disconnect(path, kind, new NullProgressMonitor());
			} catch (CoreException slurp) {
				//Don't care
			}
		}
	}
	return null;
}
 

private long getDocumentStamp(IFile file, IProgressMonitor monitor) throws CoreException {
 final ITextFileBufferManager manager= FileBuffers.getTextFileBufferManager();
 final IPath path= file.getFullPath();

 monitor.beginTask("", 2); //$NON-NLS-1$

 ITextFileBuffer buffer= null;
 try {
 	manager.connect(path, LocationKind.IFILE, new SubProgressMonitor(monitor, 1));
  buffer= manager.getTextFileBuffer(path, LocationKind.IFILE);
	    IDocument document= buffer.getDocument();

	    if (document instanceof IDocumentExtension4) {
			return ((IDocumentExtension4)document).getModificationStamp();
		} else {
			return file.getModificationStamp();
		}
 } finally {
 	if (buffer != null)
 		manager.disconnect(path, LocationKind.IFILE, new SubProgressMonitor(monitor, 1));
 	monitor.done();
 }
}
 

public long getModificationStamp(IResource resource) {
    if (!(resource instanceof IFile)) {
        return resource.getModificationStamp();
    }
    IFile file = (IFile) resource;
    ITextFileBuffer buffer = getBuffer(file);
    if (buffer == null) {
        return file.getModificationStamp();
    } else {
        IDocument document = buffer.getDocument();
        if (document instanceof IDocumentExtension4) {
            return ((IDocumentExtension4) document).getModificationStamp();
        } else {
            return file.getModificationStamp();
        }
    }
}
 

private IDocument getOpenDocument(IFile file, Map<IFile, IDocument> documentsInEditors) {
	IDocument document= documentsInEditors.get(file);
	if (document == null) {
		ITextFileBufferManager bufferManager= FileBuffers.getTextFileBufferManager();
		ITextFileBuffer textFileBuffer= bufferManager.getTextFileBuffer(file.getFullPath(), LocationKind.IFILE);
		if (textFileBuffer != null) {
			document= textFileBuffer.getDocument();
		}
	}
	return document;
}
 

/**
 * Returns the {@link IDocument} from the given file and null if it's not
 * possible.
 */
public static IDocument getDocument(IPath location) {
	ITextFileBufferManager manager = FileBuffers.getTextFileBufferManager();

	boolean connected = false;
	try {
		ITextFileBuffer buffer = manager.getTextFileBuffer(location, LocationKind.NORMALIZE);
		if (buffer == null) {
			// no existing file buffer..create one
			manager.connect(location, LocationKind.NORMALIZE, new NullProgressMonitor());
			connected = true;
			buffer = manager.getTextFileBuffer(location, LocationKind.NORMALIZE);
			if (buffer == null) {
				return null;
			}
		}

		return buffer.getDocument();
	} catch (CoreException ce) {
		TypeScriptCorePlugin.logError(ce, "Error while getting document from file");
		return null;
	} finally {
		if (connected) {
			try {
				manager.disconnect(location, LocationKind.NORMALIZE, new NullProgressMonitor());
			} catch (CoreException e) {
				TypeScriptCorePlugin.logError(e, "Error while getting document from file");
			}
		}
	}
}
 

/**
 * @return null if it was unable to get the document from the path (this may happen if it was not refreshed).
 * Or the document that represents the file
 */
public static IDocument getDocFromPath(IPath path) {
    ITextFileBuffer buffer = getBufferFromPath(path);
    if (buffer != null) {
        return buffer.getDocument();
    }
    return null;
}
 

/**
 * Return the lines which have changed in the given buffer since the last save occurred. 
 * 
 * @param buffer the buffer to compare contents from
 * @param monitor to report progress to
 * @return the regions of the changed lines or null if something went wrong.
 */
public static int[] calculateChangedLines(final ITextFileBuffer buffer, final IProgressMonitor monitor)
        throws CoreException {
    int[] result = null;

    try {
        monitor.beginTask("Calculating changed lines", 20);
        IFileStore fileStore = buffer.getFileStore();

        ITextFileBufferManager fileBufferManager = FileBuffers.createTextFileBufferManager();
        fileBufferManager.connectFileStore(fileStore, getSubProgressMonitor(monitor, 15));
        try {
            IDocument currentDocument = buffer.getDocument();
            IDocument oldDocument = ((ITextFileBuffer) fileBufferManager.getFileStoreFileBuffer(fileStore))
                    .getDocument();

            result = getChangedLines(oldDocument, currentDocument);
        } finally {
            fileBufferManager.disconnectFileStore(fileStore, getSubProgressMonitor(monitor, 5));
            monitor.done();
        }
    } catch (Exception e) {
        Log.log(e);
        return null;
    }

    return result;
}
 

private TextChange createFileChange(IFile file, Pattern pattern, Collection<Match> matches,
        RefactoringStatus resultingStatus, Collection<MatchGroup> matchGroups)
                throws PatternSyntaxException, CoreException {
    PositionTracker tracker = InternalSearchUI.getInstance().getPositionTracker();

    TextFileChange change = new SynchronizedTextFileChange(MessageFormat.format(
            SearchMessages.ReplaceRefactoring_group_label_change_for_file, file.getName()), file);
    change.setEdit(new MultiTextEdit());

    ITextFileBufferManager manager = FileBuffers.getTextFileBufferManager();
    manager.connect(file.getFullPath(), LocationKind.IFILE, null);
    try {
        ITextFileBuffer textFileBuffer = manager.getTextFileBuffer(file.getFullPath(), LocationKind.IFILE);
        if (textFileBuffer == null) {
            resultingStatus
                    .addError(MessageFormat.format(SearchMessages.ReplaceRefactoring_error_accessing_file_buffer,
                            file.getName()));
            return null;
        }
        IDocument document = textFileBuffer.getDocument();
        String lineDelimiter = TextUtilities.getDefaultLineDelimiter(document);

        for (Iterator<Match> iterator = matches.iterator(); iterator.hasNext();) {
            Match match = iterator.next();
            int offset = match.getOffset();
            int length = match.getLength();
            Position currentPosition = tracker.getCurrentPosition(match);
            if (currentPosition != null) {
                offset = currentPosition.offset;
                if (length != currentPosition.length) {
                    resultingStatus.addError(MessageFormat.format(
                            SearchMessages.ReplaceRefactoring_error_match_content_changed, file.getName()));
                    continue;
                }
            }

            String originalText = getOriginalText(document, offset, length);
            if (originalText == null) {
                resultingStatus.addError(MessageFormat.format(
                        SearchMessages.ReplaceRefactoring_error_match_content_changed, file.getName()));
                continue;
            }

            String replacementString = computeReplacementString(pattern, originalText, fReplaceString,
                    lineDelimiter);
            if (replacementString == null) {
                resultingStatus.addError(MessageFormat.format(
                        SearchMessages.ReplaceRefactoring_error_match_content_changed, file.getName()));
                continue;
            }

            ReplaceEdit replaceEdit = new ReplaceEdit(offset, length, replacementString);
            change.addEdit(replaceEdit);
            TextEditChangeGroup textEditChangeGroup = new TextEditChangeGroup(change, new TextEditGroup(
                    SearchMessages.ReplaceRefactoring_group_label_match_replace, replaceEdit));
            change.addTextEditChangeGroup(textEditChangeGroup);
            matchGroups.add(new MatchGroup(textEditChangeGroup, match));
        }
    } finally {
        manager.disconnect(file.getFullPath(), LocationKind.IFILE, null);
    }
    return change;
}