com.geofx.xmleditor.outline.EditorContentOutlinePage.java Source code

Introduction

Here is the source code for com.geofx.xmleditor.outline.EditorContentOutlinePage.java

Source

/*******************************************************************************
 * Copyright (c) 2008-09 Phil Zoio and Ric Wright 
 * 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/org/documents/epl-v10.html
 * 
 * This code is in part derived from Eclipse wizard code, but also originally 
 * written by Phil Zoio as detailed in the article:
 * http://www.realsolve.co.uk/site/tech/jface-text.php
 * 
 * Contributors:
 *       Phil Zoio - 2004 - Original implementation
 *     Ric Wright - 2008-2009 - Bug fixes and tweaks
 *     
 ********************************************************************************/

package com.geofx.xmleditor.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.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;

import com.geofx.xmleditor.xml.XMLElement;

/**
 * 
 */
public class EditorContentOutlinePage extends ContentOutlinePage {

    private ITextEditor editor;
    private IEditorInput input;
    private OutlineContentProvider outlineContentProvider;
    private OutlineLabelProvider outlineLabelProvider;

    public EditorContentOutlinePage(ITextEditor editor) {
        super();
        this.editor = editor;
    }

    public void createControl(Composite parent) {

        super.createControl(parent);
        TreeViewer viewer = getTreeViewer();
        outlineContentProvider = new OutlineContentProvider(editor.getDocumentProvider());
        viewer.setContentProvider(outlineContentProvider);
        outlineLabelProvider = new OutlineLabelProvider();
        viewer.setLabelProvider(outlineLabelProvider);
        viewer.addSelectionChangedListener(this);

        //control is created after input is set
        if (input != null)
            viewer.setInput(input);
    }

    /**
     * Sets the input of the outline page
     */
    public void setInput(Object input) {
        this.input = (IEditorInput) input;
        update();
    }

    /*
     * Change in selection
     */
    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 {
            XMLElement element = (XMLElement) ((IStructuredSelection) selection).getFirstElement();

            int start = element.getPosition().getOffset();
            int length = element.getPosition().getLength();
            try {
                editor.setHighlightRange(start, length, true);
            } catch (IllegalArgumentException x) {
                editor.resetHighlightRange();
            }
        }
    }

    /**
     * The editor is saved, so we should refresh representation
     * 
     * @param tableNamePositions
     */
    public void update() {
        //set the input so that the outlines parse can be called
        //update the tree viewer state
        TreeViewer viewer = getTreeViewer();

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

}