org.eclipse.mylyn.ide.ui.AbstractFocusMarkerViewAction.java Source code

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Here is the source code for org.eclipse.mylyn.ide.ui.AbstractFocusMarkerViewAction.java

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/*******************************************************************************
 * Copyright (c) 2004, 2008 Tasktop Technologies 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:
 *     Tasktop Technologies - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.ide.ui;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.mylyn.commons.core.StatusHandler;
import org.eclipse.mylyn.context.ui.AbstractFocusViewAction;
import org.eclipse.mylyn.context.ui.InterestFilter;
import org.eclipse.mylyn.internal.ide.ui.IdeUiBridgePlugin;
import org.eclipse.mylyn.internal.ide.ui.MarkerInterestFilter;
import org.eclipse.mylyn.internal.ide.ui.MarkerViewLabelProvider;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.internal.views.markers.ExtendedMarkersView;
import org.eclipse.ui.internal.views.markers.MarkersTreeViewer;
import org.eclipse.ui.views.markers.internal.TableViewLabelProvider;

/**
 * @author Mik Kersten
 * @since 3.0
 */
public abstract class AbstractFocusMarkerViewAction extends AbstractFocusViewAction {

    private StructuredViewer cachedViewer = null;

    public AbstractFocusMarkerViewAction() {
        super(new MarkerInterestFilter(), true, true, false);
    }

    public AbstractFocusMarkerViewAction(InterestFilter interestFilter, boolean manageViewer, boolean manageFilters,
            boolean manageLinking) {
        super(interestFilter, manageFilters, manageFilters, manageLinking);
    }

    /**
     * HACK: should use platform decorating label provider
     * 
     * @param viewer
     */
    protected void updateMarkerViewLabelProvider(StructuredViewer viewer) {
        if (viewer != null) {
            IBaseLabelProvider currentProvider = viewer.getLabelProvider();
            if (currentProvider instanceof TableViewLabelProvider
                    && !(currentProvider instanceof MarkerViewLabelProvider)) {
                viewer.setLabelProvider(new MarkerViewLabelProvider((TableViewLabelProvider) currentProvider));
            }
        }
    }

    /**
     * HACK: changing accessibility
     */
    @Override
    public List<StructuredViewer> getViewers() {
        List<StructuredViewer> viewers = new ArrayList<StructuredViewer>();
        if (cachedViewer == null) {
            try {
                IViewPart viewPart = super.getPartForAction();
                if (viewPart != null) {
                    // NOTE: following code is Eclipse 3.4 specific
                    Class<?> clazz = ExtendedMarkersView.class;
                    Field field = clazz.getDeclaredField("viewer"); //$NON-NLS-1$
                    field.setAccessible(true);
                    cachedViewer = (MarkersTreeViewer) field.get(viewPart);
                    if (cachedViewer != null && !cachedViewer.getControl().isDisposed()) {
                        updateMarkerViewLabelProvider(cachedViewer);
                    }
                }
            } catch (Exception e) {
                StatusHandler.log(new Status(IStatus.ERROR, IdeUiBridgePlugin.ID_PLUGIN,
                        "Could not get problems view viewer", e)); //$NON-NLS-1$
            }
        }
        if (cachedViewer != null) {
            viewers.add(cachedViewer);
        }
        return viewers;
    }

    @Override
    public void update() {
        super.update();
        cachedViewer = null;
        for (StructuredViewer viewer : getViewers()) {
            if (viewer instanceof TableViewer) {
                TableViewer tableViewer = (TableViewer) viewer;
                if (!(tableViewer.getLabelProvider() instanceof MarkerViewLabelProvider)) {
                    tableViewer.setLabelProvider(
                            new MarkerViewLabelProvider((TableViewLabelProvider) tableViewer.getLabelProvider()));
                }
            }
        }
    }
}