org.eclipse.mylyn.internal.sandbox.ui.JavaContextLabelProvider.java Source code

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Here is the source code for org.eclipse.mylyn.internal.sandbox.ui.JavaContextLabelProvider.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.internal.sandbox.ui;

import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.ui.viewsupport.AppearanceAwareLabelProvider;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementImageProvider;
import org.eclipse.jdt.internal.ui.viewsupport.TreeHierarchyLayoutProblemsDecorator;
import org.eclipse.jdt.ui.JavaElementLabels;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.mylyn.commons.ui.CommonImages;
import org.eclipse.mylyn.context.core.IInteractionElement;
import org.eclipse.mylyn.context.core.IInteractionRelation;
import org.eclipse.mylyn.internal.context.core.InteractionContextManager;
import org.eclipse.mylyn.internal.java.ui.JavaStructureBridge;
import org.eclipse.mylyn.internal.java.ui.JavaUiBridgePlugin;
import org.eclipse.mylyn.internal.java.ui.search.AbstractJavaRelationProvider;
import org.eclipse.mylyn.internal.java.ui.search.JUnitReferencesProvider;
import org.eclipse.mylyn.internal.java.ui.search.JavaImplementorsProvider;
import org.eclipse.mylyn.internal.java.ui.search.JavaReadAccessProvider;
import org.eclipse.mylyn.internal.java.ui.search.JavaReferencesProvider;
import org.eclipse.mylyn.internal.java.ui.search.JavaWriteAccessProvider;
import org.eclipse.swt.graphics.Image;

/**
 * @author Mik Kersten
 * @since 3.0
 */
public class JavaContextLabelProvider extends AppearanceAwareLabelProvider {

    private static final String LABEL_ELEMENT_MISSING = "<missing element>";

    private static final ImageDescriptor EDGE_REF_JUNIT = JavaUiBridgePlugin
            .getImageDescriptor("icons/elcl16/edge-ref-junit.gif");

    public JavaContextLabelProvider() {
        super(AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.P_COMPRESSED,
                AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | JavaElementImageProvider.SMALL_ICONS);
    }

    @Override
    public String getText(Object object) {
        if (object instanceof IInteractionElement) {
            IInteractionElement node = (IInteractionElement) object;
            if (JavaStructureBridge.CONTENT_TYPE.equals(node.getContentType())) {
                IJavaElement element = JavaCore.create(node.getHandleIdentifier());
                if (element == null) {
                    return LABEL_ELEMENT_MISSING;
                } else {
                    return getTextForElement(element);
                }
            }
        } else if (object instanceof IInteractionRelation) {
            return getNameForRelationship(((IInteractionRelation) object).getRelationshipHandle());
        } else if (object instanceof IJavaElement) {
            return getTextForElement((IJavaElement) object);
        }
        return super.getText(object);
    }

    private String getTextForElement(IJavaElement element) {
        if (DelegatingContextLabelProvider.isQualifyNamesMode()) {
            if (element instanceof IMember && !(element instanceof IType)) {
                String parentName = ((IMember) element).getParent().getElementName();
                if (parentName != null && parentName != "") {
                    return parentName + '.' + super.getText(element);
                }
            }
        }
        if (element.exists()) {
            return super.getText(element);
        } else {
            return LABEL_ELEMENT_MISSING;
        }
    }

    @Override
    public Image getImage(Object object) {
        if (object instanceof IInteractionElement) {
            IInteractionElement node = (IInteractionElement) object;
            if (node.getContentType().equals(JavaStructureBridge.CONTENT_TYPE)) {
                return super.getImage(JavaCore.create(node.getHandleIdentifier()));
            }
        } else if (object instanceof IInteractionRelation) {
            ImageDescriptor descriptor = getIconForRelationship(
                    ((IInteractionRelation) object).getRelationshipHandle());
            if (descriptor != null) {
                return CommonImages.getImage(descriptor);
            } else {
                return null;
            }
        }
        return super.getImage(object);
    }

    private ImageDescriptor getIconForRelationship(String relationshipHandle) {
        if (relationshipHandle.equals(AbstractJavaRelationProvider.ID_GENERIC)) {
            return SandboxUiImages.EDGE_REFERENCE;
        } else if (relationshipHandle.equals(JavaReferencesProvider.ID)) {
            return SandboxUiImages.EDGE_REFERENCE;
        } else if (relationshipHandle.equals(JavaImplementorsProvider.ID)) {
            return SandboxUiImages.EDGE_INHERITANCE;
        } else if (relationshipHandle.equals(JUnitReferencesProvider.ID)) {
            return EDGE_REF_JUNIT;
        } else if (relationshipHandle.equals(JavaWriteAccessProvider.ID)) {
            return SandboxUiImages.EDGE_ACCESS_WRITE;
        } else if (relationshipHandle.equals(JavaReadAccessProvider.ID)) {
            return SandboxUiImages.EDGE_ACCESS_READ;
        } else {
            return null;
        }
    }

    private String getNameForRelationship(String relationshipHandle) {
        if (relationshipHandle.equals(AbstractJavaRelationProvider.ID_GENERIC)) {
            return AbstractJavaRelationProvider.NAME;
        } else if (relationshipHandle.equals(JavaReferencesProvider.ID)) {
            return JavaReferencesProvider.NAME;
        } else if (relationshipHandle.equals(JavaImplementorsProvider.ID)) {
            return JavaImplementorsProvider.NAME;
        } else if (relationshipHandle.equals(JUnitReferencesProvider.ID)) {
            return JUnitReferencesProvider.NAME;
        } else if (relationshipHandle.equals(JavaWriteAccessProvider.ID)) {
            return JavaWriteAccessProvider.NAME;
        } else if (relationshipHandle.equals(JavaReadAccessProvider.ID)) {
            return JavaReadAccessProvider.NAME;
        } else if (relationshipHandle.equals(InteractionContextManager.CONTAINMENT_PROPAGATION_ID)) {
            return "Containment"; // TODO: make this generic?
        } else {
            return null;
        }
    }

    public static AppearanceAwareLabelProvider createJavaUiLabelProvider() {
        AppearanceAwareLabelProvider javaUiLabelProvider = new AppearanceAwareLabelProvider(
                AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.P_COMPRESSED,
                AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | JavaElementImageProvider.SMALL_ICONS);
        javaUiLabelProvider.addLabelDecorator(new TreeHierarchyLayoutProblemsDecorator());
        return javaUiLabelProvider;
    }
}