net.zehrer.no2.semantic.editor.outline.EditorContentOutlinePage.java Source code

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Here is the source code for net.zehrer.no2.semantic.editor.outline.EditorContentOutlinePage.java

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/*******************************************************************************
 * Copyright (c) 2010 Stephan Zehrer 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:
 *     Stephan Zehrer - initial API and implementation
 *******************************************************************************/

package net.zehrer.no2.semantic.editor.outline;

import net.zehrer.no2.semantic.editor.SemanticEditor;
import net.zehrer.no2.semantic.editor.model.AbstractNode;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;

public class EditorContentOutlinePage extends ContentOutlinePage {

    private SemanticEditor fTextEditor;
    private IDocumentProvider fDocumentProvider;

    private OutlineContentProvider fContentProvider;

    private IEditorInput fInput;

    public EditorContentOutlinePage(IDocumentProvider documentProvider, SemanticEditor semanticEditor) {
        super();
        this.fDocumentProvider = documentProvider;
        this.fTextEditor = semanticEditor;
    }

    public void createControl(Composite parent) {

        super.createControl(parent);
        TreeViewer viewer = getTreeViewer();

        this.fContentProvider = new OutlineContentProvider();

        viewer.setContentProvider(this.fContentProvider);
        viewer.setLabelProvider(new OutlineLabelProvider());

        viewer.addSelectionChangedListener(this);

        viewer.setInput(getDocument());
    }

    public void selectionChanged(SelectionChangedEvent event) {

        super.selectionChanged(event);

        ISelection selection = event.getSelection();
        if (selection.isEmpty()) {
            fTextEditor.resetHighlightRange();
        } else {
            AbstractNode node = (AbstractNode) ((IStructuredSelection) selection).getFirstElement();

            try {
                fTextEditor.setHighlightRange(node.getOffset(), node.getLength(), true);
            } catch (IllegalArgumentException x) {
                fTextEditor.resetHighlightRange();
            }
        }
    }

    public void setInput(IEditorInput editorInput) {
        this.fInput = editorInput;
        update();
    }

    protected Object getDocument() {
        if (fInput != null) {
            return fDocumentProvider.getDocument(fInput);
        }

        return null;
    }

    /**
     * Updates the outline page.
     */
    public void update() {
        TreeViewer viewer = getTreeViewer();

        if (viewer != null) {
            Control control = viewer.getControl();
            if (control != null && !control.isDisposed()) {
                control.setRedraw(false);
                viewer.setInput(getDocument());
                viewer.expandAll();
                control.setRedraw(true);
            }
        }
    }
}