Adding modifications for NSSecureTextField. This is a partial

implementation which works at the same level as OPENSTEP 4.2.
The methods necessary to echo bullets to the screen will be
added later. (GJC)


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@8021 72102866-910b-0410-8b05-ffd578937521

Source/NSSecureTextField.m

@@ -5,9 +5,12 @@
 
    Copyright (C) 1999 Free Software Foundation, Inc.
 
-   Author:  Lyndon Tremblay <humasect@coolmail.com>
+   Original Author:  Lyndon Tremblay <humasect@coolmail.com>
    Date: 1999
 
+   Rewrite by: Gregory John Casamento <borgheron@yahoo.com>
+   Date: 2000
+
    This file is part of the GNUstep GUI Library.
 
    This library is free software; you can redistribute it and/or
@@ -34,10 +37,25 @@
 //
 
 #include <gnustep/gui/config.h>
-
 #include <AppKit/NSSecureTextField.h>
 #include <AppKit/NSImage.h>
 #include <AppKit/NSFont.h>
+#include <AppKit/NSTextView.h>
+#include <AppKit/NSLayoutManager.h>
+#include <AppKit/NSWindow.h>
+#include <AppKit/NSEvent.h>
+#include "GSSimpleLayoutManager.h"
+
+/* Other secure subclasses */
+@interface NSSecureTextView : NSTextView
+{
+}
+@end
+
+@interface GSSimpleSecureLayoutManager : GSSimpleLayoutManager
+{
+}
+@end
 
 @implementation NSSecureTextField
 
@@ -50,10 +68,32 @@
 {
   if (self == [NSSecureTextField class]) {
 	[self setVersion:1];
-	[self setCellClass: [NSSecureTextFieldCell class]];
   }
 }
 
+/*
+============
++ cellClass
+============
+*/
++ (Class) cellClass
+{
+  // Hard code here to make sure no other class can be used.
+  return [NSSecureTextFieldCell class];
+}
+
+/*
+============
++ setCellClass
+============
+*/
++ (void) setCellClass: (Class)factoryId
+{
+  // Ward off interlopers with a stern message.
+  [NSException raise: NSInvalidArgumentException
+	      format: @"NSSecureTextField can only use NSSecureTextFieldCells in order to ensure security."];
+}
+
 /*
 ==============
 -initWithFrame:
@@ -69,19 +109,28 @@
 
 /*
 ==============
--isSelectable:
+-initWithCoder:
 ==============
 */
-- (BOOL)isSelectable
+- (id) initWithCoder:(NSCoder *)decoder
 {
-  return NO;
+  BOOL echosBullets = YES;
+
+  [super initWithCoder: decoder];
+  [decoder decodeValueOfObjCType: @encode(BOOL) at: &echosBullets];
+  [_cell setEchosBullets: echosBullets];
+
+  return self;
 }
 
-
+- (void) textDidEndEditing: (NSNotification *)aNotification
+{
+  [_text_object setText: [[aNotification object] text]]; 
+  [super textDidEndEditing: aNotification];
+}
 @end /* NSSecureTextField */
 
 @implementation NSSecureTextFieldCell
-
 /*
 ==============
 +initialize
@@ -94,17 +143,22 @@
 }
 
 /*
-==============
+==================================
--copyWithZone:
++_sharedSecureFieldEditorInstance
-==============
+==================================
 */
-- (id)copyWithZone:(NSZone *)zone
++ (id)_sharedSecureFieldEditorInstance
 {
-  //Prevent the cell's text value from being copied.
+  static NSSecureTextView *secureView = nil;
-  NSSecureTextFieldCell *c = [super copyWithZone:zone];
+
-  [c setStringValue:@""];
+  if( secureView == nil )
-  [c setEchosBullets:i_echosBullets];
+    {
-  return c;
+      secureView = [[NSSecureTextView alloc] init];
+      [secureView setFieldEditor: YES];
+      [secureView setText: @""];
+    }
+
+  return secureView; 
 }
 
 /*
@@ -127,25 +181,6 @@
   i_echosBullets = flag;
 }
 
-/*
-===============
--setSelectable:
-===============
-*/
-- (void)setSelectable:(BOOL)flag
-{
-  _cell.is_selectable = NO;
-}
-
-/*
-=============
--selectText:
-=============
-*/
-- (void)selectText:(id)sender
-{
-}
-
 /*
 ===============
 -drawInteriorWithFrame:
@@ -153,45 +188,101 @@
 */
 - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
 {
-  NSString *string = [self stringValue];
+  // do nothing....
-  unsigned length = [string length];
-
-
-
-  [self setType:NSNullCellType];
-  [super drawInteriorWithFrame:cellFrame inView:controlView];
-  [self setType:NSTextCellType];
-
-  if (length && i_echosBullets) {
-	NSImage *image = [NSImage imageNamed:@"common_Diamond"];
-	NSSize size = [image size];
-	NSPoint position;
-	float stringWidth;
-
-
-	stringWidth = [[self font] widthOfString:string];
-	switch ([self alignment]) {
-	case NSRightTextAlignment:
-	  position.x = (NSWidth(cellFrame) - (stringWidth)) - 1;
-	  break;
-	case NSCenterTextAlignment:
-	  position.x = NSMidX(cellFrame) - (stringWidth/2);
-	  break;
-	default:
-	  position.x = 1;
-	  break;
 }
 
-	position.y = MAX(NSMidY(cellFrame) - (size.height/2), 0);
+/*
-	if ([controlView isFlipped])
+ * Editing Text
-	  position.y += size.height;
+ */
+- (void) editWithFrame: (NSRect)aRect
+		inView: (NSView*)controlView
+		editor: (NSText*)textObject 
+	      delegate: (id)anObject
+		 event: (NSEvent*)theEvent
+{
+  id l_editor = [NSSecureTextFieldCell _sharedSecureFieldEditorInstance];
 
-	while (--length) {
+  [l_editor setText: [textObject text]];
-	  [image compositeToPoint:position operation:NSCompositeCopy];
+  [super editWithFrame: aRect
-	  position.x += size.width+1;
+		inView: controlView
-	}
+		editor: l_editor
-  }
+	      delegate: anObject
-  //[self _drawText:stars inFrame:cellFrame];
+		 event: theEvent];
 }
 
+- (void) selectWithFrame: (NSRect)aRect
+		  inView: (NSView*)controlView
+		  editor: (NSText*)textObject
+		delegate: (id)anObject
+		   start: (int)selStart
+		  length: (int)selLength
+{
+  id l_editor = [NSSecureTextFieldCell _sharedSecureFieldEditorInstance];
+
+  [l_editor setText: [textObject text]];
+  [super selectWithFrame: aRect
+		  inView: controlView
+                  editor: l_editor
+		delegate: anObject
+		   start: selStart
+                  length: selLength];
+}
+@end
+
+@implementation GSSimpleSecureLayoutManager
+- (void) drawGlyphsForGlyphRange: (NSRange)glyphRange
+			 atPoint: (NSPoint)containerOrigin
+{
+  // do nothing...  
+}
+@end
+
+@implementation NSSecureTextView
+/* Class methods */
++ (void) initialize
+{
+  if ([self class] == [NSSecureTextView class])
+    {
+      [self setVersion: 1];
+      [self registerForServices];
+    }
+}
+
+- (id) initWithFrame: (NSRect)frameRect
+{
+  NSTextContainer *aTextContainer = 
+      [[NSTextContainer alloc] initWithContainerSize: frameRect.size];
+  GSSimpleSecureLayoutManager *layoutManager = [[GSSimpleSecureLayoutManager alloc] init];
+  
+  [super initWithFrame: frameRect];
+  [layoutManager addTextContainer: aTextContainer];
+  RELEASE(aTextContainer);
+
+  _textStorage = [[NSTextStorage alloc] init];
+  [_textStorage addLayoutManager: layoutManager];
+  RELEASE(layoutManager);
+
+  return [self initWithFrame: frameRect textContainer: aTextContainer];
+}
+
+- (void) copy: (id)sender
+{
+  // Do nothing since copying from a NSSecureTextView is *not* permitted.
+}
+
+- (BOOL) writeSelectionToPasteboard: (NSPasteboard*)pboard
+			      types: (NSArray*)types
+{
+  /* Returns NO since the selection should never be 
+     written to the pasteboard */
+  return NO;
+}
+
+- (id) validRequestorForSendType: (NSString*) sendType
+		      returnType: (NSString*) returnType
+{
+  /* return "nil" to indicate that no type can be sent to the pasteboard for
+     an object of this class */
+  return nil;
+}
 @end