Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2008 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 com.siteview.mde.internal.ui.util; import com.siteview.mde.core.monitor.IMonitorModelBase; import com.siteview.mde.core.monitor.MonitorRegistry; import java.io.*; import java.util.*; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.LabelProvider; import com.siteview.mde.internal.ui.MDEPluginImages; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.ui.plugin.AbstractUIPlugin; public class SharedLabelProvider extends LabelProvider implements ITableLabelProvider { public static final int F_ERROR = 1; public static final int F_WARNING = 2; public static final int F_EXPORT = 4; public static final int F_EDIT = 8; public static final int F_BINARY = 16; public static final int F_EXTERNAL = 32; public static final int F_JAVA = 64; public static final int F_JAR = 128; public static final int F_PROJECT = 256; public static final int F_OPTIONAL = 512; public static final int F_INTERNAL = 1024; public static final int F_FRIEND = 2048; Hashtable images = new Hashtable(); ArrayList consumers = new ArrayList(); private Image fBlankImage; public SharedLabelProvider() { } public void connect(Object consumer) { if (!consumers.contains(consumer)) consumers.add(consumer); } public void disconnect(Object consumer) { consumers.remove(consumer); if (consumers.size() == 0) { dispose(); } } public void dispose() { if (consumers.size() == 0) { for (Enumeration elements = images.elements(); elements.hasMoreElements();) { ((Image) elements.nextElement()).dispose(); } images.clear(); if (fBlankImage != null) { fBlankImage.dispose(); fBlankImage = null; } } } public Image get(ImageDescriptor desc) { return get(desc, 0); } public Image get(ImageDescriptor desc, int flags) { Object key = desc; if (flags != 0) { key = getKey(desc.hashCode(), flags); } Image image = (Image) images.get(key); if (image == null) { image = createImage(desc, flags); images.put(key, image); } return image; } public Image get(Image image, int flags) { if (flags == 0) return image; String key = getKey(image.hashCode(), flags); Image resultImage = (Image) images.get(key); if (resultImage == null) { resultImage = createImage(image, flags); images.put(key, resultImage); } return resultImage; } private String getKey(long hashCode, int flags) { return ("" + hashCode) + ":" + flags; //$NON-NLS-1$ //$NON-NLS-2$ } private Image createImage(ImageDescriptor baseDesc, int flags) { if (flags == 0) { return baseDesc.createImage(); } ImageDescriptor[] lowerLeft = getLowerLeftOverlays(flags); ImageDescriptor[] upperRight = getUpperRightOverlays(flags); ImageDescriptor[] lowerRight = getLowerRightOverlays(flags); ImageDescriptor[] upperLeft = getUpperLeftOverlays(flags); OverlayIcon compDesc = new OverlayIcon(baseDesc, new ImageDescriptor[][] { upperRight, lowerRight, lowerLeft, upperLeft }); return compDesc.createImage(); } private Image createImage(Image baseImage, int flags) { if (flags == 0) { return baseImage; } ImageDescriptor[] lowerLeft = getLowerLeftOverlays(flags); ImageDescriptor[] upperRight = getUpperRightOverlays(flags); ImageDescriptor[] lowerRight = getLowerRightOverlays(flags); ImageDescriptor[] upperLeft = getUpperLeftOverlays(flags); ImageOverlayIcon compDesc = new ImageOverlayIcon(baseImage, new ImageDescriptor[][] { upperRight, lowerRight, lowerLeft, upperLeft }); return compDesc.createImage(); } private ImageDescriptor[] getLowerLeftOverlays(int flags) { if ((flags & F_ERROR) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_ERROR_CO }; if ((flags & F_WARNING) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_WARNING_CO }; return null; } private ImageDescriptor[] getUpperRightOverlays(int flags) { if ((flags & F_EXPORT) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_EXPORT_CO }; if ((flags & F_EDIT) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_DOC_CO }; if ((flags & F_JAVA) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_JAVA_CO }; return null; } private ImageDescriptor[] getLowerRightOverlays(int flags) { if ((flags & F_JAR) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_JAR_CO }; if ((flags & F_PROJECT) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_PROJECT_CO }; if ((flags & F_OPTIONAL) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_OPTIONAL_CO }; if ((flags & F_INTERNAL) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_INTERNAL_CO }; if ((flags & F_FRIEND) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_FRIEND_CO }; return null; } private ImageDescriptor[] getUpperLeftOverlays(int flags) { if ((flags & F_EXTERNAL) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_EXTERNAL_CO }; if ((flags & F_BINARY) != 0) return new ImageDescriptor[] { MDEPluginImages.DESC_BINARY_CO }; return null; } public String getColumnText(Object obj, int index) { return getText(obj); } public Image getColumnImage(Object obj, int index) { return getImage(obj); } public Image getImageFromPlugin(String bundleID, String path) { ImageDescriptor desc = AbstractUIPlugin.imageDescriptorFromPlugin(bundleID, path); return (desc != null) ? get(desc) : getBlankImage(); } public Image getImageFromPlugin(IMonitorModelBase model, String relativePath) { String platform = "platform:/plugin/"; //$NON-NLS-1$ if (relativePath.startsWith(platform)) { relativePath = relativePath.substring(platform.length()); int index = relativePath.indexOf('/'); if (index == -1) return null; model = MonitorRegistry.findModel(relativePath.substring(0, index)); if (model == null) return null; relativePath = relativePath.substring(index + 1); } String location = model.getInstallLocation(); if (location == null) return null; File pluginLocation = new File(location); InputStream stream = null; ZipFile jarFile = null; try { if (pluginLocation.isDirectory()) { File file = new File(pluginLocation, relativePath); if (file.exists()) stream = new FileInputStream(file); else if (relativePath.length() > 5 && relativePath.startsWith("$nl$/")) { //$NON-NLS-1$ file = new File(pluginLocation, relativePath.substring(5)); if (file.exists()) stream = new FileInputStream(file); } } else { jarFile = new ZipFile(pluginLocation, ZipFile.OPEN_READ); ZipEntry manifestEntry = jarFile.getEntry(relativePath); if (manifestEntry != null) { stream = jarFile.getInputStream(manifestEntry); } else if (relativePath.length() > 5 && relativePath.startsWith("$nl$/")) { //$NON-NLS-1$ manifestEntry = jarFile.getEntry(relativePath.substring(5)); if (manifestEntry != null) { stream = jarFile.getInputStream(manifestEntry); } } } if (stream != null) { ImageDescriptor desc = ImageDescriptor.createFromImageData(new ImageData(stream)); return get(desc); } } catch (FileNotFoundException e) { } catch (IOException e) { } finally { try { if (stream != null) stream.close(); if (jarFile != null) jarFile.close(); } catch (IOException e) { } } return getBlankImage(); } public Image getBlankImage() { if (fBlankImage == null) fBlankImage = ImageDescriptor.getMissingImageDescriptor().createImage(); return fBlankImage; } }