bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/FileDialog.java - platform/eclipse.platform.swt - Git at Google

 package org.eclipse.swt.widgets;

 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved
  */

 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.widgets.*;

 /**
  * Instances of this class allow the user to navigate
  * the file system and select or enter a file name.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>SAVE, OPEN, MULTI</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  */
 public class FileDialog extends Dialog {
 	String [] filterNames = new String [0];
 	String [] filterExtensions = new String [0];
 	String [] fileNames = new String [0];
 	String filterPath = "", fileName = "";
 	String fullPath = "";
 	static final String FILTER = "*.*";
 	static int BUFFER_SIZE = 1024 * 10;

 public FileDialog (Shell parent) {
 	this (parent, SWT.PRIMARY_MODAL);
 }

 public FileDialog (Shell parent, int style) {
 	super (parent, style);
 }

 public String getFileName () {
 	return fileName;
 }

 public String [] getFileNames () {
 	return fileNames;
 }

 public String [] getFilterNames () {
 	return filterNames;
 }

 public String [] getFilterExtensions () {
 	return filterExtensions;
 }

 public String getFilterPath () {
 	return filterPath;
 }

 public String open () {
 	int hHeap = OS.GetProcessHeap ();

 	/* Get the owner HWND for the dialog */
 	int hwndOwner = 0;
 	if (parent != null) hwndOwner = parent.handle;

 	/* Convert the title and copy it into lpstrTitle */
 	if (title == null) title = "";
 	byte [] buffer3 = Converter.wcsToMbcs (0, title, true);
 	int lpstrTitle = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, buffer3.length);
 	OS.MoveMemory (lpstrTitle, buffer3, buffer3.length);

 	/* Compute filters and copy into lpstrFilter */
 	String strFilter = "";
 	if (filterNames == null) filterNames = new String [0];
 	if (filterExtensions == null) filterExtensions = new String [0];
 	for (int i=0; i<filterExtensions.length; i++) {
 		String filterName = filterExtensions [i];
 		if (i < filterNames.length) filterName = filterNames [i];
 		strFilter = strFilter + filterName + '\0' + filterExtensions [i] + '\0';
 	}
 	if (filterExtensions.length == 0) {
 		strFilter = strFilter + FILTER + '\0' + FILTER + '\0';
 	}
 	byte [] buffer4 = Converter.wcsToMbcs (0, strFilter, true);
 	int lpstrFilter = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, buffer4.length);
 	OS.MoveMemory (lpstrFilter, buffer4, buffer4.length);

 	/* Convert the fileName and filterName to C strings */
 	if (fileName == null) fileName = "";
 	byte [] name = Converter.wcsToMbcs (0, fileName, false);
 	if (filterPath == null) filterPath = "";
 	byte [] path = Converter.wcsToMbcs (0, filterPath, false);

 	/*
 	* Bug/Feature in Windows.  Verify that the file name is valid.
 	* If an invalid file name is passed to the standard dialog, it
 	* does not open and returns an error code.  The fix is to avoid
 	* this behavior by verifying the file name before opening the
 	* dialog.  If the file name is not valid, use an empty string.
 	*/
 	byte [] buffer2 = new byte [name.length + 1];
 	System.arraycopy (name, 0, buffer2, 0, name.length);
 	if (OS.GetFileTitle (buffer2, null, (short) 0) < 0) {
 		name = new byte [0];
 	}

 	/*
 	* Copy the name into lpstrFile and ensure that the
 	* last byte is NULL and the buffer does not overrun.
 	* Note that the longest that a single path name can
 	* be on Windows is 256.
 	*/
 	int bufferSize = 256;
 	if ((style & SWT.MULTI) != 0) bufferSize = Math.max (256, BUFFER_SIZE);
 	int lpstrFile = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, bufferSize);
 	OS.MoveMemory (lpstrFile, name, Math.min (name.length, bufferSize - 1));

 	/*
 	* Copy the path into lpstrInitialDir and ensure that
 	* the last byte is NULL and the buffer does not overrun.
 	*/
 	int lpstrInitialDir = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, bufferSize);
 	OS.MoveMemory (lpstrInitialDir, path, Math.min (path.length, bufferSize - 1));

 	/* Create the file dialog struct */
 	OPENFILENAME struct = new OPENFILENAME ();
 	struct.lStructSize = OPENFILENAME.sizeof;
 	struct.Flags = OS.OFN_HIDEREADONLY | OS.OFN_NOCHANGEDIR;
 	if ((style & SWT.MULTI) != 0) {
 		struct.Flags |= OS.OFN_ALLOWMULTISELECT | OS.OFN_EXPLORER;
 	}
 	struct.hwndOwner = hwndOwner;
 	struct.lpstrTitle = lpstrTitle;
 	struct.lpstrFile = lpstrFile;
 	struct.nMaxFile = bufferSize;
 	struct.lpstrInitialDir = lpstrInitialDir;
 	struct.lpstrFilter = lpstrFilter;
 	struct.nFilterIndex = 0;

 	/*
 	* Feature in Windows.  The focus window is not saved and
 	* and restored automatically by the call to GetOpenFileName ().
 	* The fix is to save and restore the focus window.
 	*/
 	int hwndFocus = OS.GetFocus ();

 	/*
 	* Bug/Feature in Windows.  When Windows opens the standard
 	* file dialog, it changes the cursor to the hourglass and
 	* does not put it back.  The fix is to save the current
 	* cursor and restore it when the dialog closes.
 	*/
 	int hCursor = OS.GetCursor ();

 	/*
 	* Open the dialog.  If the open fails due to an invalid
 	* file name, use an empty file name and open it again.
 	*/
 	boolean save = (style & SWT.SAVE) != 0;
 	boolean success = (save) ? OS.GetSaveFileName (struct) : OS.GetOpenFileName (struct);
 	if (OS.CommDlgExtendedError () == OS.FNERR_INVALIDFILENAME) {
 		OS.MoveMemory (lpstrFile, new byte [1], 1);
 		success = (save) ? OS.GetSaveFileName (struct) : OS.GetOpenFileName (struct);
 	}

 	/* Set the new path, file name and filter */
 	fullPath = null;
 	if (success) {
 		int count = 0;
 		fileNames = new String [1];
 		byte [] buffer = new byte [struct.nMaxFile];
 		OS.MoveMemory (buffer, lpstrFile, buffer.length);
 		byte [] prefix = new byte [struct.nFileOffset - 1];
 		System.arraycopy (buffer, 0, prefix, 0, prefix.length);
 		filterPath = new String (Converter.mbcsToWcs (0, prefix));
 		int start = struct.nFileOffset;
 		do {
 			int end = start;
 			while (end < buffer.length && buffer [end] != 0) end++;
 			byte [] buffer1 = new byte [end - start];
 			System.arraycopy (buffer, start, buffer1, 0, buffer1.length);
 			start = end;
 			String string = new String (Converter.mbcsToWcs (0, buffer1));
 			if (count == fileNames.length) {
 				String [] newFileNames = new String [fileNames.length + 4];
 				System.arraycopy (fileNames, 0, newFileNames, 0, fileNames.length);
 				fileNames = newFileNames;
 			}
 			fileNames [count++] = string;
 			if ((style & SWT.MULTI) == 0) break;
 			start++;
 		} while (start < buffer.length && buffer [start] != 0);
 		if (fileNames.length > 0) fileName = fileNames  [0];
 		String separator = "";
 		int length = filterPath.length ();
 		if (length > 0 && filterPath.charAt (length - 1) != '\\') {
 			separator = "\\";
 		}
 		fullPath = filterPath + separator + fileName;
 		if (count < fileNames.length) {
 			String [] newFileNames = new String [count];
 			System.arraycopy (fileNames, 0, newFileNames, 0, count);
 			fileNames = newFileNames;
 		}
 	}

 	/* Free the memory that was allocated. */
 	OS.HeapFree (hHeap, 0, lpstrFile);
 	OS.HeapFree (hHeap, 0, lpstrFilter);
 	OS.HeapFree (hHeap, 0, lpstrInitialDir);
 	OS.HeapFree (hHeap, 0, lpstrTitle);

 	/* Restore the old cursor */
 	OS.SetCursor (hCursor);

 	/* Restore the old focus */
 	OS.SetFocus (hwndFocus);

 	/*
 	* This code is intentionally commented.  On some
 	* platforms, the owner window is repainted right
 	* away when a dialog window exits.  This behavior
 	* is currently unspecified.
 	*/
 //	if (hwndOwner != 0) OS.UpdateWindow (hwndOwner);

 	/* Answer the full path or null */
 	return fullPath;
 }

 public void setFileName (String string) {
 	fileName = string;
 }

 public void setFilterExtensions (String [] extensions) {
 	filterExtensions = extensions;
 }

 public void setFilterNames (String [] names) {
 	filterNames = names;
 }

 public void setFilterPath (String string) {
 	filterPath = string;
 }

 }
	package org.eclipse.swt.widgets;

	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved
	*/

	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.win32.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.widgets.*;

	/**
	* Instances of this class allow the user to navigate
	* the file system and select or enter a file name.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>SAVE, OPEN, MULTI</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*/
	public class FileDialog extends Dialog {
	String [] filterNames = new String [0];
	String [] filterExtensions = new String [0];
	String [] fileNames = new String [0];
	String filterPath = "", fileName = "";
	String fullPath = "";
	static final String FILTER = ".";
	static int BUFFER_SIZE = 1024 * 10;

	public FileDialog (Shell parent) {
	this (parent, SWT.PRIMARY_MODAL);
	}

	public FileDialog (Shell parent, int style) {
	super (parent, style);
	}

	public String getFileName () {
	return fileName;
	}

	public String [] getFileNames () {
	return fileNames;
	}

	public String [] getFilterNames () {
	return filterNames;
	}

	public String [] getFilterExtensions () {
	return filterExtensions;
	}

	public String getFilterPath () {
	return filterPath;
	}

	public String open () {
	int hHeap = OS.GetProcessHeap ();

	/* Get the owner HWND for the dialog */
	int hwndOwner = 0;
	if (parent != null) hwndOwner = parent.handle;

	/* Convert the title and copy it into lpstrTitle */
	if (title == null) title = "";
	byte [] buffer3 = Converter.wcsToMbcs (0, title, true);
	int lpstrTitle = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, buffer3.length);
	OS.MoveMemory (lpstrTitle, buffer3, buffer3.length);

	/* Compute filters and copy into lpstrFilter */
	String strFilter = "";
	if (filterNames == null) filterNames = new String [0];
	if (filterExtensions == null) filterExtensions = new String [0];
	for (int i=0; i<filterExtensions.length; i++) {
	String filterName = filterExtensions [i];
	if (i < filterNames.length) filterName = filterNames [i];
	strFilter = strFilter + filterName + '\0' + filterExtensions [i] + '\0';
	}
	if (filterExtensions.length == 0) {
	strFilter = strFilter + FILTER + '\0' + FILTER + '\0';
	}
	byte [] buffer4 = Converter.wcsToMbcs (0, strFilter, true);
	int lpstrFilter = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, buffer4.length);
	OS.MoveMemory (lpstrFilter, buffer4, buffer4.length);

	/* Convert the fileName and filterName to C strings */
	if (fileName == null) fileName = "";
	byte [] name = Converter.wcsToMbcs (0, fileName, false);
	if (filterPath == null) filterPath = "";
	byte [] path = Converter.wcsToMbcs (0, filterPath, false);

	/*
	* Bug/Feature in Windows. Verify that the file name is valid.
	* If an invalid file name is passed to the standard dialog, it
	* does not open and returns an error code. The fix is to avoid
	* this behavior by verifying the file name before opening the
	* dialog. If the file name is not valid, use an empty string.
	*/
	byte [] buffer2 = new byte [name.length + 1];
	System.arraycopy (name, 0, buffer2, 0, name.length);
	if (OS.GetFileTitle (buffer2, null, (short) 0) < 0) {
	name = new byte [0];
	}

	/*
	* Copy the name into lpstrFile and ensure that the
	* last byte is NULL and the buffer does not overrun.
	* Note that the longest that a single path name can
	* be on Windows is 256.
	*/
	int bufferSize = 256;
	if ((style & SWT.MULTI) != 0) bufferSize = Math.max (256, BUFFER_SIZE);
	int lpstrFile = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, bufferSize);
	OS.MoveMemory (lpstrFile, name, Math.min (name.length, bufferSize - 1));

	/*
	* Copy the path into lpstrInitialDir and ensure that
	* the last byte is NULL and the buffer does not overrun.
	*/
	int lpstrInitialDir = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, bufferSize);
	OS.MoveMemory (lpstrInitialDir, path, Math.min (path.length, bufferSize - 1));

	/* Create the file dialog struct */
	OPENFILENAME struct = new OPENFILENAME ();
	struct.lStructSize = OPENFILENAME.sizeof;
	struct.Flags = OS.OFN_HIDEREADONLY \| OS.OFN_NOCHANGEDIR;
	if ((style & SWT.MULTI) != 0) {
	struct.Flags \|= OS.OFN_ALLOWMULTISELECT \| OS.OFN_EXPLORER;
	}
	struct.hwndOwner = hwndOwner;
	struct.lpstrTitle = lpstrTitle;
	struct.lpstrFile = lpstrFile;
	struct.nMaxFile = bufferSize;
	struct.lpstrInitialDir = lpstrInitialDir;
	struct.lpstrFilter = lpstrFilter;
	struct.nFilterIndex = 0;

	/*
	* Feature in Windows. The focus window is not saved and
	* and restored automatically by the call to GetOpenFileName ().
	* The fix is to save and restore the focus window.
	*/
	int hwndFocus = OS.GetFocus ();

	/*
	* Bug/Feature in Windows. When Windows opens the standard
	* file dialog, it changes the cursor to the hourglass and
	* does not put it back. The fix is to save the current
	* cursor and restore it when the dialog closes.
	*/
	int hCursor = OS.GetCursor ();

	/*
	* Open the dialog. If the open fails due to an invalid
	* file name, use an empty file name and open it again.
	*/
	boolean save = (style & SWT.SAVE) != 0;
	boolean success = (save) ? OS.GetSaveFileName (struct) : OS.GetOpenFileName (struct);
	if (OS.CommDlgExtendedError () == OS.FNERR_INVALIDFILENAME) {
	OS.MoveMemory (lpstrFile, new byte [1], 1);
	success = (save) ? OS.GetSaveFileName (struct) : OS.GetOpenFileName (struct);
	}

	/* Set the new path, file name and filter */
	fullPath = null;
	if (success) {
	int count = 0;
	fileNames = new String [1];
	byte [] buffer = new byte [struct.nMaxFile];
	OS.MoveMemory (buffer, lpstrFile, buffer.length);
	byte [] prefix = new byte [struct.nFileOffset - 1];
	System.arraycopy (buffer, 0, prefix, 0, prefix.length);
	filterPath = new String (Converter.mbcsToWcs (0, prefix));
	int start = struct.nFileOffset;
	do {
	int end = start;
	while (end < buffer.length && buffer [end] != 0) end++;
	byte [] buffer1 = new byte [end - start];
	System.arraycopy (buffer, start, buffer1, 0, buffer1.length);
	start = end;
	String string = new String (Converter.mbcsToWcs (0, buffer1));
	if (count == fileNames.length) {
	String [] newFileNames = new String [fileNames.length + 4];
	System.arraycopy (fileNames, 0, newFileNames, 0, fileNames.length);
	fileNames = newFileNames;
	}
	fileNames [count++] = string;
	if ((style & SWT.MULTI) == 0) break;
	start++;
	} while (start < buffer.length && buffer [start] != 0);
	if (fileNames.length > 0) fileName = fileNames [0];
	String separator = "";
	int length = filterPath.length ();
	if (length > 0 && filterPath.charAt (length - 1) != '\\') {
	separator = "\\";
	}
	fullPath = filterPath + separator + fileName;
	if (count < fileNames.length) {
	String [] newFileNames = new String [count];
	System.arraycopy (fileNames, 0, newFileNames, 0, count);
	fileNames = newFileNames;
	}
	}

	/* Free the memory that was allocated. */
	OS.HeapFree (hHeap, 0, lpstrFile);
	OS.HeapFree (hHeap, 0, lpstrFilter);
	OS.HeapFree (hHeap, 0, lpstrInitialDir);
	OS.HeapFree (hHeap, 0, lpstrTitle);

	/* Restore the old cursor */
	OS.SetCursor (hCursor);

	/* Restore the old focus */
	OS.SetFocus (hwndFocus);

	/*
	* This code is intentionally commented. On some
	* platforms, the owner window is repainted right
	* away when a dialog window exits. This behavior
	* is currently unspecified.
	*/
	// if (hwndOwner != 0) OS.UpdateWindow (hwndOwner);

	/* Answer the full path or null */
	return fullPath;
	}

	public void setFileName (String string) {
	fileName = string;
	}

	public void setFilterExtensions (String [] extensions) {
	filterExtensions = extensions;
	}

	public void setFilterNames (String [] names) {
	filterNames = names;
	}

	public void setFilterPath (String string) {
	filterPath = string;
	}

	}