Mercurial > projects > dwt2
view org.eclipse.jface/src/org/eclipse/jface/resource/URLImageDescriptor.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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/******************************************************************************* * 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.jface.resource.URLImageDescriptor; import org.eclipse.jface.resource.ImageDescriptor; // import java.io.BufferedInputStream; // import java.io.IOException; // import java.io.InputStream; import tango.net.Uri; import org.eclipse.swt.SWT; import org.eclipse.swt.SWTException; import org.eclipse.swt.graphics.Device; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.util.Policy; import java.lang.all; import java.io.BufferedInputStream; import java.io.InputStream; /** * An ImageDescriptor that gets its information from a URL. This class is not * public API. Use ImageDescriptor#createFromURL to create a descriptor that * uses a URL. */ class URLImageDescriptor : ImageDescriptor { /** * Constant for the file protocol for optimized loading */ private static final String FILE_PROTOCOL = "file"; //$NON-NLS-1$ private Uri url; /** * Creates a new URLImageDescriptor. * * @param url * The URL to load the image from. Must be non-null. */ this(Uri url) { this.url = url; } /* * (non-Javadoc) Method declared on Object. */ public override int opEquals(Object o) { if (!(cast(URLImageDescriptor)o )) { return false; } return (cast(URLImageDescriptor) o).url.opEquals(this.url) !is 0; } /* * (non-Javadoc) Method declared on ImageDesciptor. Returns null if the * image data cannot be read. */ public override ImageData getImageData() { ImageData result = null; InputStream in_ = getStream(); if (in_ !is null) { scope(exit) in_.close(); try { result = new ImageData(in_); } catch (SWTException e) { if (e.code !is SWT.ERROR_INVALID_IMAGE) { throw e; // fall through otherwise } } } return result; } /** * Returns a stream on the image contents. Returns null if a stream could * not be opened. * * @return the stream for loading the data */ protected InputStream getStream() { implMissing( __FILE__, __LINE__ ); return null; //FIXME /+ try { return new BufferedInputStream(url.openStream()); } catch (IOException e) { return null; } +/ } /* * (non-Javadoc) Method declared on Object. */ public override hash_t toHash() { return url.toHash(); } /* * (non-Javadoc) Method declared on Object. */ /** * The <code>URLImageDescriptor</code> implementation of this * <code>Object</code> method returns a string representation of this * object which is suitable only for debugging. */ public override String toString() { return "URLImageDescriptor(" ~ url.toString ~ ")"; //$NON-NLS-1$ //$NON-NLS-2$ } /** * Returns the filename for the ImageData. * * @return {@link String} or <code>null</code> if the file cannot be found */ private String getFilePath() { // try { // if (JFaceActivator.getBundleContext() is null) { // if (FILE_PROTOCOL.equalsIgnoreCase(url.getProtocol())) // return new Path(url.getFile()).toOSString(); // return null; // } // // URL locatedURL = FileLocator.toFileURL(url); // if (FILE_PROTOCOL.equalsIgnoreCase(locatedURL.getProtocol())) // return new Path(locatedURL.getPath()).toOSString(); // return null; // // } catch (IOException e) { // Policy.logException(e); // return null; // } return null; } /* * (non-Javadoc) * * @see org.eclipse.jface.resource.ImageDescriptor#createImage(bool, * org.eclipse.swt.graphics.Device) */ public override Image createImage(bool returnMissingImageOnError, Device device) { // Try to see if we can optimize using SWTs file based image support. String path = getFilePath(); if (path is null) return super.createImage(returnMissingImageOnError, device); try { return new Image(device, path); } catch (SWTException exception) { // If we fail fall back to the slower input stream method. } return super.createImage(returnMissingImageOnError, device); } }