Mercurial > projects > dwt2
view org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/FileTransfer.d @ 43:b98647bc0aef
swt win compiles for d2+phobos
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 25 Mar 2009 17:08:05 +0100 |
parents | d46287db17ed |
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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.swt.dnd.FileTransfer; import org.eclipse.swt.internal.ole.win32.COM; import org.eclipse.swt.internal.ole.win32.OBJIDL; import org.eclipse.swt.internal.win32.OS; import org.eclipse.swt.dnd.ByteArrayTransfer; import org.eclipse.swt.dnd.TransferData; import org.eclipse.swt.dnd.DND; import java.lang.all; /** * 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 : ByteArrayTransfer { private static FileTransfer _instance; private static const String CF_HDROP = "CF_HDROP "; //$NON-NLS-1$ private static const int CF_HDROPID = COM.CF_HDROP; private static const String CF_HDROP_SEPARATOR = "\0"; //$NON-NLS-1$ private this() {} /** * Returns the singleton instance of the FileTransfer class. * * @return the singleton instance of the FileTransfer class */ public static FileTransfer getInstance () { if( _instance is null ){ synchronized { if( _instance is null ){ _instance = new FileTransfer(); } } } 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) { if (!checkFile(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } String[] fileNames; if( auto strs = cast(ArrayWrapperString2) object ){ fileNames = strs.array; } StringBuffer allFiles = new StringBuffer(); for (int i = 0; i < fileNames.length; i++) { allFiles.append(fileNames[i]); allFiles.append(CF_HDROP_SEPARATOR); // each name is null terminated } StringT buffer = StrToTCHARs(0, allFiles.toString(), true); // there is an extra null terminator at the very end DROPFILES dropfiles; dropfiles.pFiles = DROPFILES.sizeof; dropfiles.pt.x = dropfiles.pt.y = 0; dropfiles.fNC = 0; dropfiles.fWide = OS.IsUnicode ? 1 : 0; // Allocate the memory because the caller (DropTarget) has not handed it in // The caller of this method must release the data when it is done with it. int byteCount = buffer.length * TCHAR.sizeof; auto newPtr = OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, DROPFILES.sizeof + byteCount); OS.MoveMemory(newPtr, &dropfiles, DROPFILES.sizeof); OS.MoveMemory(newPtr + DROPFILES.sizeof, buffer.ptr, byteCount); transferData.stgmedium = new STGMEDIUM(); transferData.stgmedium.tymed = COM.TYMED_HGLOBAL; transferData.stgmedium.unionField = newPtr; transferData.stgmedium.pUnkForRelease = null; transferData.result = COM.S_OK; } /** * 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.pIDataObject is null) return null; // get file names from IDataObject IDataObject dataObject = transferData.pIDataObject; dataObject.AddRef(); FORMATETC* formatetc = new FORMATETC(); formatetc.cfFormat = COM.CF_HDROP; formatetc.ptd = null; formatetc.dwAspect = COM.DVASPECT_CONTENT; formatetc.lindex = -1; formatetc.tymed = COM.TYMED_HGLOBAL; STGMEDIUM* stgmedium = new STGMEDIUM(); stgmedium.tymed = COM.TYMED_HGLOBAL; transferData.result = getData(dataObject, formatetc, stgmedium); dataObject.Release(); if (transferData.result !is COM.S_OK) return null; // How many files are there? int count = OS.DragQueryFile(stgmedium.unionField, 0xFFFFFFFF, null, 0); String[] fileNames = new String[](count); for (int i = 0; i < count; i++) { // How long is the name ? int size = OS.DragQueryFile(stgmedium.unionField, i, null, 0) + 1; TCHAR[] lpszFile = NewTCHARs(0, size); // Get file name and append it to string OS.DragQueryFile(stgmedium.unionField, i, lpszFile.ptr, size); fileNames[i] = TCHARzToStr(lpszFile.ptr); } OS.DragFinish(stgmedium.unionField); // frees data associated with HDROP data return new ArrayWrapperString2(fileNames); } protected int[] getTypeIds(){ return [CF_HDROPID]; } protected String[] getTypeNames(){ return [CF_HDROP]; } bool checkFile(Object object) { String[] strings; if( auto strs = cast(ArrayWrapperString2)object ){ strings = strs.array; } if (!strings) return false; for (int i = 0; i < strings.length; i++) { if (strings[i] is null || strings[i].length is 0) return false; } return true; } protected bool validate(Object object) { return checkFile(object); } }