| /******************************************************************************* |
| * Copyright (c) 2000, 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.swt.dnd; |
| |
| import org.eclipse.swt.internal.gtk.*; |
| |
| /** |
| * 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 { |
| |
| private static FileTransfer _instance = new FileTransfer(); |
| private static final String URI_LIST = "text/uri-list"; //$NON-NLS-1$ |
| private static final int URI_LIST_ID = registerType(URI_LIST); |
| private static final String GNOME_LIST = "x-special/gnome-copied-files"; //$NON-NLS-1$ |
| private static final int GNOME_LIST_ID = registerType(GNOME_LIST); |
| |
| private FileTransfer() {} |
| |
| /** |
| * 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 |
| */ |
| @Override |
| public void javaToNative(Object object, TransferData transferData) { |
| transferData.result = 0; |
| if (!checkFile(object) || !isSupportedType(transferData)) { |
| DND.error(DND.ERROR_INVALID_DATA); |
| } |
| boolean gnomeList = transferData.type == GNOME_LIST_ID; |
| byte[] buffer, separator; |
| if (gnomeList) { |
| buffer = new byte[] {'c','o','p','y'}; |
| separator = new byte[] {'\n'}; |
| } else { |
| buffer = new byte[0]; |
| separator = new byte[] {'\r', '\n'}; |
| } |
| String[] files = (String[])object; |
| for (int i = 0; i < files.length; i++) { |
| String string = files[i]; |
| if (string == null) continue; |
| int length = string.length(); |
| if (length == 0) continue; |
| char[] chars = new char[length]; |
| string.getChars(0, length, chars, 0); |
| long /*int*/[] error = new long /*int*/[1]; |
| long /*int*/ utf8Ptr = OS.g_utf16_to_utf8(chars, chars.length, null, null, error); |
| if (error[0] != 0 || utf8Ptr == 0) continue; |
| long /*int*/ localePtr = OS.g_filename_from_utf8(utf8Ptr, -1, null, null, error); |
| OS.g_free(utf8Ptr); |
| if (error[0] != 0 || localePtr == 0) continue; |
| long /*int*/ uriPtr = OS.g_filename_to_uri(localePtr, 0, error); |
| OS.g_free(localePtr); |
| if (error[0] != 0 || uriPtr == 0) continue; |
| length = OS.strlen(uriPtr); |
| byte[] temp = new byte[length]; |
| OS.memmove (temp, uriPtr, length); |
| OS.g_free(uriPtr); |
| int newLength = (buffer.length > 0) ? buffer.length+separator.length+temp.length : temp.length; |
| byte[] newBuffer = new byte[newLength]; |
| int offset = 0; |
| if (buffer.length > 0) { |
| System.arraycopy(buffer, 0, newBuffer, 0, buffer.length); |
| offset += buffer.length; |
| System.arraycopy(separator, 0, newBuffer, offset, separator.length); |
| offset += separator.length; |
| } |
| System.arraycopy(temp, 0, newBuffer, offset, temp.length); |
| buffer = newBuffer; |
| } |
| if (buffer.length == 0) return; |
| long /*int*/ ptr = OS.g_malloc(buffer.length+1); |
| OS.memset(ptr, '\0', buffer.length+1); |
| OS.memmove(ptr, buffer, buffer.length); |
| transferData.pValue = ptr; |
| transferData.length = buffer.length; |
| transferData.format = 8; |
| 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 |
| */ |
| @Override |
| public Object nativeToJava(TransferData transferData) { |
| if ( !isSupportedType(transferData) || transferData.pValue == 0 || transferData.length <= 0 ) return null; |
| int length = transferData.length; |
| byte[] temp = new byte[length]; |
| OS.memmove(temp, transferData.pValue, length); |
| boolean gnomeList = transferData.type == GNOME_LIST_ID; |
| int sepLength = gnomeList ? 1 : 2; |
| long /*int*/[] files = new long /*int*/[0]; |
| int offset = 0; |
| for (int i = 0; i < temp.length - 1; i++) { |
| boolean terminator = gnomeList ? temp[i] == '\n' : temp[i] == '\r' && temp[i+1] == '\n'; |
| if (terminator) { |
| if (!(gnomeList && offset == 0)) { |
| /* The content of the first line in a gnome-list is always either 'copy' or 'cut' */ |
| int size = i - offset; |
| long /*int*/ file = OS.g_malloc(size + 1); |
| byte[] fileBuffer = new byte[size + 1]; |
| System.arraycopy(temp, offset, fileBuffer, 0, size); |
| OS.memmove(file, fileBuffer, size + 1); |
| long /*int*/[] newFiles = new long /*int*/[files.length + 1]; |
| System.arraycopy(files, 0, newFiles, 0, files.length); |
| newFiles[files.length] = file; |
| files = newFiles; |
| } |
| offset = i + sepLength; |
| } |
| } |
| if (offset < temp.length - sepLength) { |
| int size = temp.length - offset; |
| long /*int*/ file = OS.g_malloc(size + 1); |
| byte[] fileBuffer = new byte[size + 1]; |
| System.arraycopy(temp, offset, fileBuffer, 0, size); |
| OS.memmove(file, fileBuffer, size + 1); |
| long /*int*/[] newFiles = new long /*int*/[files.length + 1]; |
| System.arraycopy(files, 0, newFiles, 0, files.length); |
| newFiles[files.length] = file; |
| files = newFiles; |
| } |
| String[] fileNames = new String[0]; |
| for (int i = 0; i < files.length; i++) { |
| long /*int*/[] error = new long /*int*/[1]; |
| long /*int*/ localePtr = OS.g_filename_from_uri(files[i], null, error); |
| OS.g_free(files[i]); |
| if (error[0] != 0 || localePtr == 0) continue; |
| long /*int*/ utf8Ptr = OS.g_filename_to_utf8(localePtr, -1, null, null, null); |
| if (utf8Ptr == 0) utf8Ptr = OS.g_filename_display_name (localePtr); |
| if (localePtr != utf8Ptr) OS.g_free (localePtr); |
| if (utf8Ptr == 0) continue; |
| long /*int*/[] items_written = new long /*int*/[1]; |
| long /*int*/ utf16Ptr = OS.g_utf8_to_utf16(utf8Ptr, -1, null, items_written, null); |
| OS.g_free(utf8Ptr); |
| if (utf16Ptr == 0) continue; |
| length = (int)/*64*/items_written[0]; |
| char[] buffer = new char[length]; |
| OS.memmove(buffer, utf16Ptr, length * 2); |
| OS.g_free(utf16Ptr); |
| String name = new String(buffer); |
| String[] newFileNames = new String[fileNames.length + 1]; |
| System.arraycopy(fileNames, 0, newFileNames, 0, fileNames.length); |
| newFileNames[fileNames.length] = name; |
| fileNames = newFileNames; |
| } |
| if (fileNames.length == 0) return null; |
| return fileNames; |
| } |
| |
| @Override |
| protected int[] getTypeIds(){ |
| return new int[]{URI_LIST_ID, GNOME_LIST_ID}; |
| } |
| |
| @Override |
| protected String[] getTypeNames(){ |
| return new String[]{URI_LIST, GNOME_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; |
| } |
| |
| @Override |
| protected boolean validate(Object object) { |
| return checkFile(object); |
| } |
| } |