org.eclipse.linuxtools.rpm.ui.editor.outline.SpecfileContentOutlinePage.java Source code

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Here is the source code for org.eclipse.linuxtools.rpm.ui.editor.outline.SpecfileContentOutlinePage.java

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/*******************************************************************************
 * Copyright (c) 2007, 2009 Red Hat, Inc.
 * 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:
 *    Red Hat - initial API and implementation
 *******************************************************************************/

package org.eclipse.linuxtools.rpm.ui.editor.outline;

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.linuxtools.rpm.ui.editor.SpecfileEditor;
import org.eclipse.linuxtools.rpm.ui.editor.parser.SpecfileElement;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;

public class SpecfileContentOutlinePage extends ContentOutlinePage {

    private ITextEditor editor;
    private IEditorInput input;

    public SpecfileContentOutlinePage(SpecfileEditor editor) {
        super();
        this.editor = editor;
    }

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

    public void update() {
        //set the input so that the outlines parse can be called
        //update the tree viewer state
        final TreeViewer viewer = getTreeViewer();

        if (viewer != null) {
            final Control control = viewer.getControl();
            if (control != null && !control.isDisposed()) {
                control.getDisplay().asyncExec(new Runnable() {
                    public void run() {
                        if (!control.isDisposed()) {
                            control.setRedraw(false);
                            if (input != null)
                                viewer.setInput(input);
                            viewer.expandAll();
                            control.setRedraw(true);
                        }
                    }
                });
            }
        }
    }

    @Override
    public void createControl(Composite parent) {

        super.createControl(parent);

        TreeViewer viewer = getTreeViewer();
        viewer.setContentProvider(new SpecfileContentProvider(editor));
        viewer.setLabelProvider(new SpecfileLabelProvider());
        viewer.addSelectionChangedListener(this);

        if (input != null)
            viewer.setInput(input);
    }

    /*
     * Change in selection
     */
    @Override
    public void selectionChanged(SelectionChangedEvent event) {
        super.selectionChanged(event);

        //find out which item in tree viewer we have selected, and set highlight range accordingly
        ISelection selection = event.getSelection();
        if (selection.isEmpty())
            editor.resetHighlightRange();
        else {
            SpecfileElement element = (SpecfileElement) ((IStructuredSelection) selection).getFirstElement();

            int start = element.getLineStartPosition();
            try {
                editor.setHighlightRange(start, 1, true);
            } catch (IllegalArgumentException e) {
                editor.resetHighlightRange();
            }
        }
    }

}