ext.org.eclipse.jdt.internal.ui.refactoring.JavaStatusContextViewer.java Source code

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Here is the source code for ext.org.eclipse.jdt.internal.ui.refactoring.JavaStatusContextViewer.java

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/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package ext.org.eclipse.jdt.internal.ui.refactoring;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.resources.IFile;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.source.SourceViewer;

import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.part.FileEditorInput;

import org.eclipse.ui.texteditor.IDocumentProvider;

import org.eclipse.ltk.core.refactoring.RefactoringStatusContext;
import org.eclipse.ltk.ui.refactoring.TextStatusContextViewer;

import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.ISourceRange;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.JavaElementLabels;
import org.eclipse.jdt.ui.PreferenceConstants;
import patch.org.eclipse.jdt.ui.text.JavaSourceViewerConfiguration;
import patch.org.eclipse.jdt.ui.text.JavaTextTools;

import patch.org.eclipse.jdt.internal.ui.JavaPlugin;

import ext.org.eclipse.jdt.internal.corext.refactoring.base.JavaStatusContext;
import ext.org.eclipse.jdt.internal.corext.refactoring.base.JavaStringStatusContext;
import ext.org.eclipse.jdt.internal.corext.util.Messages;
import ext.org.eclipse.jdt.internal.ui.javaeditor.InternalClassFileEditorInput;
import ext.org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer;

public class JavaStatusContextViewer extends TextStatusContextViewer {

    /* (non-Javadoc)
     * @see org.eclipse.jdt.internal.ui.refactoring.IStatusContextViewer#createControl(org.eclipse.swt.widgets.Composite)
     */
    @Override
    public void createControl(Composite parent) {
        super.createControl(parent);
        final SourceViewer viewer = getSourceViewer();
        viewer.unconfigure();
        IPreferenceStore store = JavaPlugin.getDefault().getCombinedPreferenceStore();
        viewer.configure(new JavaSourceViewerConfiguration(
                JavaPlugin.getDefault().getJavaTextTools().getColorManager(), store, null, null));
        viewer.getControl().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
    }

    @Override
    protected SourceViewer createSourceViewer(Composite parent) {
        IPreferenceStore store = JavaPlugin.getDefault().getCombinedPreferenceStore();
        return new JavaSourceViewer(parent, null, null, false,
                SWT.LEFT_TO_RIGHT | SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.FULL_SELECTION, store);
    }

    private IPackageFragmentRoot getPackageFragmentRoot(IClassFile file) {

        IJavaElement element = file.getParent();
        while (element != null && element.getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT)
            element = element.getParent();

        return (IPackageFragmentRoot) element;
    }

    public void setInput(RefactoringStatusContext context) {
        if (context instanceof JavaStatusContext) {
            JavaStatusContext jsc = (JavaStatusContext) context;
            IDocument document = null;
            if (jsc.isBinary()) {
                IClassFile file = jsc.getClassFile();
                IEditorInput editorInput = new InternalClassFileEditorInput(file);
                document = getDocument(JavaPlugin.getDefault().getClassFileDocumentProvider(), editorInput);
                if (document.getLength() == 0)
                    document = new Document(Messages
                            .format(RefactoringMessages.JavaStatusContextViewer_no_source_found0, JavaElementLabels
                                    .getElementLabel(getPackageFragmentRoot(file), JavaElementLabels.ALL_DEFAULT)));
                updateTitle(file);
            } else {
                ICompilationUnit cunit = jsc.getCompilationUnit();
                if (cunit.isWorkingCopy()) {
                    try {
                        document = newJavaDocument(cunit.getSource());
                    } catch (JavaModelException e) {
                        // document is null which is a valid input.
                    }
                } else {
                    IEditorInput editorInput = new FileEditorInput((IFile) cunit.getResource());
                    document = getDocument(JavaPlugin.getDefault().getCompilationUnitDocumentProvider(),
                            editorInput);
                }
                if (document == null)
                    document = new Document(RefactoringMessages.JavaStatusContextViewer_no_source_available);
                updateTitle(cunit);
            }
            setInput(document, createRegion(jsc.getSourceRange()));
        } else if (context instanceof JavaStringStatusContext) {
            updateTitle(null);
            JavaStringStatusContext sc = (JavaStringStatusContext) context;
            setInput(newJavaDocument(sc.getSource()), createRegion(sc.getSourceRange()));
        }
    }

    private IDocument newJavaDocument(String source) {
        IDocument result = new Document(source);
        JavaTextTools textTools = JavaPlugin.getDefault().getJavaTextTools();
        textTools.setupJavaDocumentPartitioner(result);
        return result;
    }

    private static IRegion createRegion(ISourceRange range) {
        return new Region(range.getOffset(), range.getLength());
    }

    private IDocument getDocument(IDocumentProvider provider, IEditorInput input) {
        if (input == null)
            return null;
        IDocument result = null;
        try {
            provider.connect(input);
            result = provider.getDocument(input);
        } catch (CoreException e) {
        } finally {
            provider.disconnect(input);
        }
        return result;
    }
}