| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.resource; |
| |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.SWTException; |
| import org.eclipse.swt.graphics.ImageData; |
| |
| /** |
| * An image descriptor that loads its image information |
| * from a file. |
| */ |
| class FileImageDescriptor extends ImageDescriptor { |
| |
| /** |
| * The class whose resource directory contain the file, |
| * or <code>null</code> if none. |
| */ |
| private Class location; |
| |
| /** |
| * The name of the file. |
| */ |
| private String name; |
| /** |
| * Creates a new file image descriptor. |
| * The file has the given file name and is located |
| * in the given class's resource directory. If the given |
| * class is <code>null</code>, the file name must be absolute. |
| * <p> |
| * Note that the file is not accessed until its |
| * <code>getImageDate</code> method is called. |
| * </p> |
| * |
| * @param clazz class for resource directory, or |
| * <code>null</code> |
| * @param filename the name of the file |
| */ |
| FileImageDescriptor(Class clazz, String filename) { |
| this.location = clazz; |
| this.name = filename; |
| } |
| /* (non-Javadoc) |
| * Method declared on Object. |
| */ |
| public boolean equals(Object o) { |
| if (!(o instanceof FileImageDescriptor)) { |
| return false; |
| } |
| FileImageDescriptor other = (FileImageDescriptor)o; |
| if (location != null) { |
| if (!location.equals(other.location)) { |
| return false; |
| } |
| } else { |
| if (other.location != null) { |
| return false; |
| } |
| } |
| return name.equals(other.name); |
| } |
| /* (non-Javadoc) |
| * Method declared on ImageDesciptor. |
| * Returns null if the image data cannot be read. |
| */ |
| public ImageData getImageData() { |
| InputStream in = getStream(); |
| ImageData result = null; |
| if (in != null) { |
| try { |
| result= new ImageData(in); |
| } catch (SWTException e) { |
| if (e.code != SWT.ERROR_INVALID_IMAGE) |
| throw e; |
| // fall through otherwise |
| } finally { |
| try { |
| in.close(); |
| }catch (IOException e) { |
| //System.err.println(getClass().getName()+".getImageData(): "+ |
| // "Exception while closing InputStream : "+e); |
| } |
| } |
| } |
| return result; |
| } |
| /** |
| * Returns a stream on the image contents. Returns |
| * null if a stream could not be opened. |
| */ |
| private InputStream getStream() { |
| InputStream is = null; |
| |
| if (location != null) { |
| is = location.getResourceAsStream(name); |
| } else { |
| try { |
| is = new FileInputStream(name); |
| } catch (FileNotFoundException e) { |
| return null; |
| } |
| } |
| return is; |
| } |
| /* (non-Javadoc) |
| * Method declared on Object. |
| */ |
| public int hashCode() { |
| int code = name.hashCode(); |
| if (location != null) { |
| code += location.hashCode(); |
| } |
| return code; |
| } |
| /* (non-Javadoc) |
| * Method declared on Object. |
| */ |
| /** |
| * The <code>FileImageDescriptor</code> implementation of this <code>Object</code> method |
| * returns a string representation of this object which is suitable only for debugging. |
| */ |
| public String toString() { |
| return "FileImageDescriptor(location=" + location + ", name=" + name + ")";//$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$ |
| } |
| } |