| /******************************************************************************* |
| * Copyright (c) 2005, 2012 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.ide; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.content.IContentDescription; |
| import org.eclipse.core.runtime.content.IContentType; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.viewers.IDecoration; |
| import org.eclipse.jface.viewers.ILabelProviderListener; |
| import org.eclipse.jface.viewers.ILightweightLabelDecorator; |
| import org.eclipse.ui.IEditorDescriptor; |
| import org.eclipse.ui.IWorkbench; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.ide.IDE; |
| import org.eclipse.ui.internal.ide.model.WorkbenchFile; |
| |
| /** |
| * Lightweight decorator for more specific file icons. |
| * |
| * @since 3.4 |
| * |
| */ |
| public class ContentTypeDecorator implements ILightweightLabelDecorator { |
| |
| private boolean fHasEditorAssociationOverridesComputed= false; |
| |
| private boolean fHasEditorAssociationOverrides; |
| |
| @Override |
| public void decorate(Object element, IDecoration decoration) { |
| if (!(element instanceof IFile)) |
| return; |
| IWorkbench workbench = PlatformUI.getWorkbench(); |
| if (workbench.isClosing()) |
| return; |
| |
| IFile file = (IFile) element; |
| ImageDescriptor image = null; |
| |
| if (hasEditorAssociationOverrides()) { |
| IEditorDescriptor d = IDE.getDefaultEditor(file); |
| if (d != null) |
| image = d.getImageDescriptor(); |
| } else { |
| IContentDescription contentDescription= null; |
| try { |
| Job.getJobManager().beginRule(file, null); |
| contentDescription= file.getContentDescription(); |
| } catch (CoreException e) { |
| // We already have some kind of icon for this file so it's OK to not |
| // find a better icon. |
| } finally { |
| Job.getJobManager().endRule(file); |
| } |
| |
| if (contentDescription != null) { |
| IContentType contentType = contentDescription.getContentType(); |
| if (contentType != null) { |
| image= workbench.getEditorRegistry().getImageDescriptor(file.getName(), contentType); |
| } |
| } |
| } |
| |
| // add the image descriptor as a session property so that it will be |
| // picked up by the workbench label provider upon the next update. |
| try { |
| if (file.getSessionProperty(WorkbenchFile.IMAGE_CACHE_KEY) != image) |
| file.setSessionProperty(WorkbenchFile.IMAGE_CACHE_KEY, image); |
| } catch (CoreException e) { |
| // ignore - not being able to cache the image is not fatal |
| } |
| if (image != null) |
| decoration.addOverlay(image); |
| } |
| |
| @Override |
| public void addListener(ILabelProviderListener listener) { |
| } |
| |
| @Override |
| public void dispose() { |
| } |
| |
| @Override |
| public boolean isLabelProperty(Object element, String property) { |
| return false; |
| } |
| |
| @Override |
| public void removeListener(ILabelProviderListener listener) { |
| } |
| |
| private boolean hasEditorAssociationOverrides() { |
| if (!fHasEditorAssociationOverridesComputed) { |
| fHasEditorAssociationOverrides = EditorAssociationOverrideDescriptor.getContributedEditorAssociationOverrides().length > 0; |
| fHasEditorAssociationOverridesComputed = true; |
| } |
| return fHasEditorAssociationOverrides; |
| } |
| |
| } |