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Standard Widget Toolkit for GTK on aarch64
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/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.dnd;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.gtk.*;
/**
* The class FileTransfer provides a platform specific mechanism
* for converting a list of files represented as a java String[] to a
* platform specific representation of the data and vice versa.
* Each String in the array contains the absolute path for a single
* file or directory.
*
* An example of a java String[] containing a list of files is shown
* below:
*
*
* 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();
*
*
* @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 javaToNative converts a list of file names
* represented by a java String[] to a platform specific representation.
* Each String in the array contains the absolute path for a single
* file or directory.
*
* @param object a java String[] containing the file names to be converted
* @param transferData an empty TransferData 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 [] error = new long [1];
long utf8Ptr = OS.g_utf16_to_utf8(chars, chars.length, null, null, error);
if (error[0] != 0 || utf8Ptr == 0) continue;
long localePtr = OS.g_filename_from_utf8(utf8Ptr, -1, null, null, error);
OS.g_free(utf8Ptr);
if (error[0] != 0 || localePtr == 0) continue;
long uriPtr = OS.g_filename_to_uri(localePtr, 0, error);
OS.g_free(localePtr);
if (error[0] != 0 || uriPtr == 0) continue;
length = C.strlen(uriPtr);
byte[] temp = new byte[length];
C.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 ptr = OS.g_malloc(buffer.length+1);
C.memset(ptr, '\0', buffer.length+1);
C.memmove(ptr, buffer, buffer.length);
transferData.pValue = ptr;
transferData.length = buffer.length;
transferData.format = 8;
transferData.result = 1;
}
/**
* This implementation of nativeToJava converts a platform specific
* representation of a list of file names to a java String[].
* 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 String[] 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];
C.memmove(temp, transferData.pValue, length);
boolean gnomeList = transferData.type == GNOME_LIST_ID;
int sepLength = gnomeList ? 1 : 2;
long [] files = new long [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 file = OS.g_malloc(size + 1);
byte[] fileBuffer = new byte[size + 1];
System.arraycopy(temp, offset, fileBuffer, 0, size);
C.memmove(file, fileBuffer, size + 1);
long [] newFiles = new long [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 file = OS.g_malloc(size + 1);
byte[] fileBuffer = new byte[size + 1];
System.arraycopy(temp, offset, fileBuffer, 0, size);
C.memmove(file, fileBuffer, size + 1);
long [] newFiles = new long [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 [] error = new long [1];
long localePtr = OS.g_filename_from_uri(files[i], null, error);
OS.g_free(files[i]);
if (error[0] != 0 || localePtr == 0) continue;
long 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 [] items_written = new long [1];
long utf16Ptr = OS.g_utf8_to_utf16(utf8Ptr, -1, null, items_written, null);
OS.g_free(utf8Ptr);
if (utf16Ptr == 0) continue;
length = (int)items_written[0];
char[] buffer = new char[length];
C.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);
}
}