com.google.dart.tools.ui.internal.refactoring.DartStatusContextViewer.java Source code

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Here is the source code for com.google.dart.tools.ui.internal.refactoring.DartStatusContextViewer.java

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/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.dart.tools.ui.internal.refactoring;

import com.google.dart.tools.core.model.CompilationUnit;
import com.google.dart.tools.core.model.DartModelException;
import com.google.dart.tools.core.model.SourceRange;
import com.google.dart.tools.internal.corext.refactoring.base.DartStatusContext;
import com.google.dart.tools.internal.corext.refactoring.base.DartStringStatusContext;
import com.google.dart.tools.ui.DartToolsPlugin;
import com.google.dart.tools.ui.PreferenceConstants;
import com.google.dart.tools.ui.internal.text.editor.DartSourceViewer;
import com.google.dart.tools.ui.text.DartSourceViewerConfiguration;
import com.google.dart.tools.ui.text.DartTextTools;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
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.ltk.core.refactoring.RefactoringStatusContext;
import org.eclipse.ltk.ui.refactoring.TextStatusContextViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.texteditor.IDocumentProvider;

public class DartStatusContextViewer extends TextStatusContextViewer {

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

    @Override
    public void createControl(Composite parent) {
        super.createControl(parent);
        final SourceViewer viewer = getSourceViewer();
        viewer.unconfigure();
        IPreferenceStore store = DartToolsPlugin.getDefault().getCombinedPreferenceStore();
        viewer.configure(new DartSourceViewerConfiguration(
                DartToolsPlugin.getDefault().getDartTextTools().getColorManager(), store, null, null));
        viewer.getControl().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
    }

    @Override
    public void setInput(RefactoringStatusContext context) {
        if (context instanceof DartStatusContext) {
            DartStatusContext jsc = (DartStatusContext) context;
            IDocument document = null;
            {
                CompilationUnit cunit = jsc.getCompilationUnit();
                if (cunit.isWorkingCopy()) {
                    try {
                        document = newDocument(cunit.getSource());
                    } catch (DartModelException e) {
                        // document is null which is a valid input.
                    }
                } else {
                    IEditorInput editorInput = new FileEditorInput((IFile) cunit.getResource());
                    document = getDocument(DartToolsPlugin.getDefault().getCompilationUnitDocumentProvider(),
                            editorInput);
                }
                if (document == null) {
                    document = new Document(RefactoringMessages.DartStatusContextViewer_no_source_available);
                }
                updateTitle(cunit);
            }
            setInput(document, createRegion(jsc.getSourceRange()));
        } else if (context instanceof DartStringStatusContext) {
            updateTitle(null);
            DartStringStatusContext sc = (DartStringStatusContext) context;
            setInput(newDocument(sc.getSource()), createRegion(sc.getSourceRange()));
        }
    }

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

    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;
    }

    private IDocument newDocument(String source) {
        IDocument result = new Document(source);
        DartTextTools textTools = DartToolsPlugin.getDefault().getDartTextTools();
        textTools.setupJavaDocumentPartitioner(result);
        return result;
    }
}