com.google.dart.tools.ui.web.css.CssContentOutlinePage.java Source code

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Here is the source code for com.google.dart.tools.ui.web.css.CssContentOutlinePage.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.web.css;

import com.google.dart.tools.ui.web.DartWebPlugin;
import com.google.dart.tools.ui.web.utils.CollapseAllAction;
import com.google.dart.tools.ui.web.utils.Node;

import org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;

/**
 * The outline page for the CSS editor.
 */
public class CssContentOutlinePage extends ContentOutlinePage {
    private CssEditor editor;

    /**
     * Create a new CssContentOutlinePage.
     * 
     * @param editor
     */
    public CssContentOutlinePage(CssEditor editor) {
        this.editor = editor;
    }

    @Override
    public void createControl(Composite parent) {
        super.createControl(parent);

        getTreeViewer().setLabelProvider(new DecoratingStyledCellLabelProvider(new CssLabelProvider(), null, null));
        getTreeViewer().setContentProvider(new CssContentProvider());
        getTreeViewer().setInput(editor.getModel());

        getTreeViewer().expandToLevel(2);

        getSite().getActionBars().getToolBarManager().add(new CollapseAllAction(getTreeViewer()));
    }

    @Override
    public void selectionChanged(SelectionChangedEvent event) {
        super.selectionChanged(event);

        handleTreeViewerSelectionChanged(event.getSelection());
    }

    protected void handleEditorReconcilation() {
        if (!getControl().isDisposed()) {
            refreshAsync();
        }
    }

    protected void handleTreeViewerSelectionChanged(ISelection selection) {
        if (selection instanceof IStructuredSelection) {
            Object sel = ((IStructuredSelection) selection).getFirstElement();

            if (sel instanceof Node) {
                Node node = (Node) sel;

                editor.selectAndReveal(node);
            }
        }
    }

    private void refresh() {
        try {
            if (!getTreeViewer().getControl().isDisposed()) {
                getTreeViewer().refresh(editor.getModel());
            }
        } catch (Throwable exception) {
            DartWebPlugin.logError(exception);

            getTreeViewer().setInput(null);
        }
    }

    private void refreshAsync() {
        Display.getDefault().asyncExec(new Runnable() {
            @Override
            public void run() {
                refresh();
            }
        });
    }

}