org.eclipse.rap.themeeditor.editor.CSSContentOutlinePage.java Source code

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Here is the source code for org.eclipse.rap.themeeditor.editor.CSSContentOutlinePage.java

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/*******************************************************************************
 * Copyright (c) 2008 Mathias Schaeffner 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:
 *    Mathias Schaeffner - initial API and implementation
 *******************************************************************************/
package org.eclipse.rap.themeeditor.editor;

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.rap.themeeditor.editor.source.CSSSourceEditor;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;

/**
 * Implementation of an Outline page showing StyleRules as items if the
 * Rules-Tab is activated, or showing OutlineRegions as items if the Source-Tab
 * is activated.
 */
public class CSSContentOutlinePage extends ContentOutlinePage {

    protected Object[] input;
    protected IDocumentProvider documentProvider;
    protected CSSSourceEditor textEditor;
    private boolean isSetSelectionEnabled = true;

    public CSSContentOutlinePage(CSSSourceEditor cssSourceEditor) {
        textEditor = cssSourceEditor;
    }

    public void createControl(final Composite parent) {
        super.createControl(parent);
        TreeViewer viewer = getTreeViewer();
        viewer.setContentProvider(new DefaultContentProvider());
        viewer.setLabelProvider(new ContentOutlineLabelProvider());
        if (input != null) {
            viewer.setInput(input);
        }
    }

    public void selectionChanged(final SelectionChangedEvent event) {
        isSetSelectionEnabled = false;
        super.selectionChanged(event);
        int newIndex = -1;
        Object item = null;
        ISelection selection = event.getSelection();
        if (!selection.isEmpty()) {
            item = ((IStructuredSelection) selection).getFirstElement();
        }
        if (getTreeViewer().getTree().getSelectionCount() == 1) {
            TreeItem treeItem = getTreeViewer().getTree().getSelection()[0];
            newIndex = getTreeViewer().getTree().indexOf(treeItem);
        }
        textEditor.outlineSelectionChanged(newIndex, item);
        isSetSelectionEnabled = true;
    }

    public void forceSelectionChanged(final int newIndex) {
        if (getTreeViewer() != null) {
            isSetSelectionEnabled = false;
            Object item = null;
            ISelection selection = getTreeViewer().getSelection();
            if (!selection.isEmpty()) {
                item = ((IStructuredSelection) selection).getFirstElement();
            }
            textEditor.outlineSelectionChanged(newIndex, item);
            isSetSelectionEnabled = true;
        }
    }

    public void setInput(final Object[] input) {
        this.input = input;
        update();
    }

    public void setSelection(final int index) {
        if (isSetSelectionEnabled && getTreeViewer() != null) {
            Tree tree = getTreeViewer().getTree();
            if (index >= 0 && index < tree.getItemCount()) {
                tree.setSelection(tree.getItem(index));
                tree.showSelection();
            } else {
                tree.deselectAll();
            }
        }
    }

    private void update() {
        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);
            }
        }
    }
}