Example usage for org.eclipse.jdt.core IBuffer hasUnsavedChanges

Introduction

In this page you can find the example usage for org.eclipse.jdt.core IBuffer hasUnsavedChanges.

Prototype

public boolean hasUnsavedChanges();

Source Link

Document

Returns whether this buffer has been modified since it was opened or since it was last saved.

Usage

From source file:com.google.gwt.eclipse.core.editors.java.GWTJavaEditor.java

License:Open Source License

@Override
protected void performSave(final boolean overwrite, final IProgressMonitor progressMonitor) {

    final ICompilationUnit cu = (ICompilationUnit) getInputJavaElement();
    final IJavaProject javaProject = cu.getJavaProject();
    if (javaProject == null || !formatOnSaveEnabled(javaProject)) {
        // If the user doesn't have format-on-save enabled, just delegate to super
        super.performSave(overwrite, progressMonitor);
        return;// w  ww  .  ja v  a 2 s .  c  om
    }

    final IDocument document = getDocumentProvider().getDocument(getEditorInput());

    // save all the original jsni methods as strings, in case the JS formatter
    // fails (e.g., syntax error), so that it has something to fall back on
    final String[] originalJsniMethods = JsniFormattingUtil.getJsniMethods(document);

    runBehindSmokescreen(new Runnable() {
        public void run() {
            // Have the JDT perform its own save-and-format first
            GWTJavaEditor.super.performSave(overwrite, progressMonitor);

            /*
             * We need to work around the JDT bug which causes JSNI blocks to
             * continually be shifted to the right when .java files are formatted
             * automatically on save. The fix is to reformat the file ourselves with
             * correct indentation and then re-save.
             */
            try {

                // Get the formatting edit and apply it
                TextEdit edit = JsniFormattingUtil.format(document, javaProject, originalJsniMethods);
                if (edit != null) {
                    edit.apply(document);

                    // If we made changes, re-save the .java file
                    IBuffer buffer = cu.getBuffer();
                    if (buffer.hasUnsavedChanges()) {
                        buffer.save(null, true);
                    }
                }
            } catch (Exception e) {
                GWTPluginLog.logError(e);
            }
        }
    });
}

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From source file:org.eclipse.che.jdt.internal.core.Openable.java

License:Open Source License

public boolean canBufferBeRemovedFromCache(IBuffer buffer) {
    return !buffer.hasUnsavedChanges();
}

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From source file:org.eclipse.che.jdt.internal.core.Openable.java

License:Open Source License

/**
 * @see IOpenable//from   ww  w . j  a  v a 2 s  .  c  om
 */
public boolean hasUnsavedChanges() throws JavaModelException {

    if (isReadOnly() || !isOpen()) {
        return false;
    }
    IBuffer buf = getBuffer();
    if (buf != null && buf.hasUnsavedChanges()) {
        return true;
    }
    // for package fragments, package fragment roots, and projects must check open buffers
    // to see if they have an child with unsaved changes
    int elementType = getElementType();
    if (elementType == PACKAGE_FRAGMENT || elementType == PACKAGE_FRAGMENT_ROOT || elementType == JAVA_PROJECT
            || elementType == JAVA_MODEL) { // fix for 1FWNMHH
        Enumeration openBuffers = getBufferManager().getOpenBuffers();
        while (openBuffers.hasMoreElements()) {
            IBuffer buffer = (IBuffer) openBuffers.nextElement();
            if (buffer.hasUnsavedChanges()) {
                IJavaElement owner = (IJavaElement) buffer.getOwner();
                if (isAncestorOf(owner)) {
                    return true;
                }
            }
        }
    }

    return false;
}

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From source file:org.spoofax.interpreter.library.ecj.ECJ_rewrite_file.java

License:LGPL

@SuppressWarnings("unchecked")
@Override/*from  w ww.j  av a 2s  . c o  m*/
public boolean call(IContext env, Strategy[] svars, IStrategoTerm[] tvars) throws InterpreterException {

    if (!ECJTools.isIFile(tvars[0]))
        return false;

    final IFile file = ECJTools.asIFile(tvars[0]);
    final ICompilationUnit cu = JavaCore.createCompilationUnitFrom(file);
    final ECJLibrary ecj = (ECJLibrary) env.getOperatorRegistry(ECJLibrary.REGISTRY_NAME);
    final ECJFactory factory = (ECJFactory) env.getFactory();

    AST oldAST = factory.getAST();

    ecj.setCurrentProject(cu.getJavaProject().getProject());
    ecj.setCurrentJavaProject(cu.getJavaProject());

    try {
        final IBuffer buffer = cu.getBuffer();
        final boolean previouslyModified = buffer.hasUnsavedChanges();

        Document document = new Document(buffer.getContents());
        ASTParser p = ecj.getParser();
        p.setSource(cu);
        CompilationUnit root = (CompilationUnit) p.createAST(null);
        factory.setAST(root.getAST());

        //System.out.println("before: " + root);
        root.recordModifications();
        @SuppressWarnings("rawtypes")
        List newTds = new ArrayList();
        for (Object ob : root.types()) {
            TypeDeclaration td = (TypeDeclaration) ob;

            CallT s = (CallT) svars[0];
            env.setCurrent(ECJFactory.wrap(td));
            if (s.evaluate(env)) {
                final IStrategoTerm term = env.current();
                if (term instanceof WrappedASTNode)
                    newTds.add(((WrappedASTNode) term).getWrappee());
                else
                    ecj.log("Rewriting types resulted in an invalid tree");
            } else {
                newTds.add(td);
            }
        }
        root.types().clear();
        root.types().addAll(newTds);

        @SuppressWarnings("rawtypes")
        List newImports = new ArrayList();
        env.setCurrent(ECJFactory.wrap(root.imports()));
        CallT s = (CallT) svars[1];
        if (s.evaluate(env)) {
            final IStrategoTerm term = env.current();
            if (term instanceof IStrategoList) {
                for (IStrategoTerm t : ((IStrategoList) term).getAllSubterms()) {
                    if (t instanceof WrappedImportDeclaration) {
                        ImportDeclaration id = ((WrappedImportDeclaration) t).getWrappee();
                        // FIXME should this be handled elsewhere?
                        if (id.getAST() != root.getAST()) {
                            id = (ImportDeclaration) ASTNode.copySubtree(root.getAST(), id);
                        }
                        newImports.add(id);
                    } else {
                        ecj.log("Rewriting import did not give an ImportDeclaration");
                    }
                }
            } else {
                ecj.log("Rewriting imports did not give a list");
            }
        }
        root.imports().clear();
        root.imports().addAll(newImports);

        //System.out.println("after: " + root);
        TextEdit te = root.rewrite(document, cu.getJavaProject().getOptions(true));
        te.apply(document);
        cu.getBuffer().setContents(document.get());
        if (!previouslyModified)
            cu.getBuffer().save(null, false);
    } catch (JavaModelException e) {
        e.printStackTrace();
        ecj.log("Model exception");
    } catch (BadLocationException e) {
        e.printStackTrace();
        ecj.log("Bad location exception");
    }
    factory.setAST(oldAST);
    return true;
}

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