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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/FileTransfer.java')
-rwxr-xr-x | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/FileTransfer.java | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/FileTransfer.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/FileTransfer.java new file mode 100755 index 0000000000..c9a62703bd --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/FileTransfer.java @@ -0,0 +1,148 @@ +/******************************************************************************* + * 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 org.eclipse.swt.dnd; + +import org.eclipse.swt.internal.*; +import org.eclipse.swt.internal.motif.*; + +/** + * The class <code>FileTransfer</code> provides a platform specific mechanism + * for converting a list of files represented as a java <code>String[]</code> to a + * platform specific representation of the data and vice versa. + * Each <code>String</code> in the array contains the absolute path for a single + * file or directory. + * + * <p>An example of a java <code>String[]</code> containing a list of files is shown + * below:</p> + * + * <code><pre> + * File file1 = new File("C:\temp\file1"); + * File file2 = new File("C:\temp\file2"); + * String[] fileData = new String[2]; + * fileData[0] = file1.getAbsolutePath(); + * fileData[1] = file2.getAbsolutePath(); + * </code></pre> + * + * @see Transfer + */ +public class FileTransfer extends ByteArrayTransfer { + + static FileTransfer _instance = new FileTransfer(); + static final String URI_LIST = "text/uri-list"; //$NON-NLS-1$ + static final int URI_LIST_ID = registerType(URI_LIST); + static final String URI_LIST_PREFIX = "file:"; //$NON-NLS-1$ + static final String URI_LIST_SEPARATOR = "\r"; //$NON-NLS-1$ + +FileTransfer() {/*empty*/} + +/** + * Returns the singleton instance of the FileTransfer class. + * + * @return the singleton instance of the FileTransfer class + */ +public static FileTransfer getInstance () { + return _instance; +} + +/** + * This implementation of <code>javaToNative</code> converts a list of file names + * represented by a java <code>String[]</code> to a platform specific representation. + * Each <code>String</code> in the array contains the absolute path for a single + * file or directory. + * + * @param object a java <code>String[]</code> containing the file names to be converted + * @param transferData an empty <code>TransferData</code> object that will + * be filled in on return with the platform specific format of the data + * + * @see Transfer#nativeToJava + */ +public void javaToNative(Object object, TransferData transferData) { + transferData.result = 0; + if (!checkFile(object) || !isSupportedType(transferData)) { + DND.error(DND.ERROR_INVALID_DATA); + } + String[] files = (String[])object; + StringBuffer sb = new StringBuffer(); + for (int i = 0, length = files.length; i < length; i++){ + sb.append(URI_LIST_PREFIX); + sb.append(files[i]); + sb.append(URI_LIST_SEPARATOR); + } + byte[] buffer = Converter.wcsToMbcs(null, sb.toString(), true); + int pValue = OS.XtMalloc(buffer.length); + if (pValue == 0) return; + OS.memmove(pValue, buffer, buffer.length); + transferData.length = buffer.length; + transferData.format = 8; + transferData.pValue = pValue; + transferData.result = 1; +} +/** + * This implementation of <code>nativeToJava</code> converts a platform specific + * representation of a list of file names to a java <code>String[]</code>. + * Each String in the array contains the absolute path for a single file or directory. + * + * @param transferData the platform specific representation of the data to be converted + * @return a java <code>String[]</code> containing a list of file names if the conversion + * was successful; otherwise null + * + * @see Transfer#javaToNative + */ +public Object nativeToJava(TransferData transferData) { + if (!isSupportedType(transferData) || transferData.pValue == 0) return null; + int size = transferData.format * transferData.length / 8; + if (size == 0) return null; + + byte[] buffer = new byte[size]; + OS.memmove(buffer, transferData.pValue, size); + char[] chars = Converter.mbcsToWcs(null, buffer); + String string = new String(chars); + // parse data and convert string to array of files + int start = string.indexOf(URI_LIST_PREFIX); + if (start == -1) return null; + start += URI_LIST_PREFIX.length(); + String[] fileNames = new String[0]; + while (start < string.length()) { + int end = string.indexOf(URI_LIST_SEPARATOR, start); + if (end == -1) end = string.length() - 1; + String fileName = string.substring(start, end); + String[] newFileNames = new String[fileNames.length + 1]; + System.arraycopy(fileNames, 0, newFileNames, 0, fileNames.length); + newFileNames[fileNames.length] = fileName; + fileNames = newFileNames; + start = string.indexOf(URI_LIST_PREFIX, end); + if (start == -1) break; + start += URI_LIST_PREFIX.length(); + } + return fileNames; +} + +protected int[] getTypeIds(){ + return new int[]{URI_LIST_ID}; +} + +protected String[] getTypeNames(){ + return new String[]{URI_LIST}; +} + +boolean checkFile(Object object) { + if (object == null || !(object instanceof String[]) || ((String[])object).length == 0) return false; + String[] strings = (String[])object; + for (int i = 0; i < strings.length; i++) { + if (strings[i] == null || strings[i].length() == 0) return false; + } + return true; +} + +protected boolean validate(Object object) { + return checkFile(object); +} +} |