/** <title>NSTextView</title>

   Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.

   Much code of this class was originally derived from code which was
   in NSText.m.

   Author: Scott Christley <scottc@net-community.com>
   Date: 1996

   Author: Felipe A. Rodriguez <far@ix.netcom.com>
   Date: July 1998

   Author: Daniel Bðhringer <boehring@biomed.ruhr-uni-bochum.de>
   Date: August 1998

   Author: Fred Kiefer <FredKiefer@gmx.de>
   Date: March 2000, September 2000

   Author: Nicola Pero <n.pero@mi.flashnet.it>
   Date: 2000, 2001, 2002

   Author: Pierre-Yves Rivaille <pyrivail@ens-lyon.fr>
   Date: September 2002

   Extensive reworking: Alexander Malmberg <alexander@malmberg.org>
   Date: December 2002 - February 2003

   This file is part of the GNUstep GUI Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; see the file COPYING.LIB.
   If not, write to the Free Software Foundation,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

#include "AppKit/NSTextView.h"

#include "config.h"
#include <Foundation/NSArchiver.h>
#include <Foundation/NSArray.h>
#include <Foundation/NSCoder.h>
#include <Foundation/NSDebug.h>
#include <Foundation/NSException.h>
#include <Foundation/NSKeyedArchiver.h>
#include <Foundation/NSNotification.h>
#include <Foundation/NSRunLoop.h>
#include <Foundation/NSString.h>
#include <Foundation/NSTimer.h>
#include <Foundation/NSUndoManager.h>
#include <Foundation/NSValue.h>
#include "AppKit/NSApplication.h"
#include "AppKit/NSClipView.h"
#include "AppKit/NSColor.h"
#include "AppKit/NSColorPanel.h"
#include "AppKit/NSControl.h"
#include "AppKit/NSDragging.h"
#include "AppKit/NSEvent.h"
#include "AppKit/NSFileWrapper.h"
#include "AppKit/NSImage.h"
#include "AppKit/NSLayoutManager.h"
#include "AppKit/NSParagraphStyle.h"
#include "AppKit/NSPasteboard.h"
#include "AppKit/NSRulerMarker.h"
#include "AppKit/NSRulerView.h"
#include "AppKit/NSScrollView.h"
#include "AppKit/NSSpellChecker.h"
#include "AppKit/NSTextAttachment.h"
#include "AppKit/NSTextContainer.h"
#include "AppKit/NSTextStorage.h"
#include "AppKit/NSWindow.h"


/*
NSTextView_actions.m has comments about what methods dealing with user
actions and user-initiated changes need to do. These also apply to some
methods in this file.
*/


/*
TODOs:

think hard about insertion point management


How should resizing work? If the text view is set to track the used part
of the text container, when does it actually update its size? Might need
a new internal method called from NSLayoutManager when text has changed.
(Currently NSLayoutManager calls -sizeToFit when text has changed.)

*/



/*
Interface for a bunch of internal methods that need to be cleaned up.
*/
@interface NSTextView (GNUstepPrivate)
/*
 * Used to implement the blinking insertion point
 */
- (void) _blink: (NSTimer *)t;

/*
 * these NSLayoutManager- like method is here only informally
 */
- (NSRect) rectForCharacterRange: (NSRange)aRange;

//
// GNU utility methods
//
- (void) copySelection;
- (void) pasteSelection;
@end

// This class is a helper for keyed unarchiving only
@interface NSTextViewSharedData : NSObject 
{
@private
  NSColor *backgroundColor;
  NSParagraphStyle *paragraphStyle;
  unsigned int flags;
  NSColor *insertionColor;
  NSArray *linkAttr;
  NSArray *markAttr;
  NSArray *selectedAttr;
  NSTextView *textView;
}
- (NSColor *) backgroundColor;
- (NSParagraphStyle *) paragraphStyle;
- (unsigned int) flags;
- (NSColor *) insertionColor;
- (NSArray *) linkAttributes;
- (NSArray *) markAttributes;
- (NSArray *) selectedAttributes;
- (NSTextView *) textView;
@end

@implementation NSTextViewSharedData

- (id) initWithTextView: (NSTextView *)tv
{
  if ((self = [super init]) != nil)
    {
      flags = (([tv isEditable]?0x01:0) |
	       ([tv isSelectable]?0x02:0) |
	       ([tv isRichText]?0x04:0) |
	       ([tv importsGraphics]?0x08:0) |
	       ([tv isFieldEditor]?0x10:0) |
	       ([tv usesFontPanel]?0x20:0) |
	       ([tv isRulerVisible]?0x40:0) |
	       ([tv usesRuler]?0x100:0) |
	       ([tv drawsBackground]?0x800:0) |
	       ([tv smartInsertDeleteEnabled]?0x2000000:0) |
	       ([tv allowsUndo]?0x40000000:0));

      ASSIGN(backgroundColor,[tv backgroundColor]);
      ASSIGN(paragraphStyle,[NSParagraphStyle defaultParagraphStyle]);
      ASSIGN(insertionColor,[tv insertionPointColor]);
      ASSIGN(markAttr,[tv markedTextAttributes]);
      ASSIGN(selectedAttr,[tv selectedTextAttributes]);
      
      linkAttr = nil;
      textView = tv;
    }

  return self;
}

- (id) initWithCoder: (NSCoder*)aDecoder
{
  if ([aDecoder allowsKeyedCoding])
    {
      ASSIGN(backgroundColor,
	[aDecoder decodeObjectForKey: @"NSBackgroundColor"]);
      ASSIGN(paragraphStyle,
	[aDecoder decodeObjectForKey: @"NSDefaultParagraphStyle"]);
      flags = [aDecoder decodeIntForKey: @"NSFlags"];
      ASSIGN(insertionColor,
	[aDecoder decodeObjectForKey: @"NSInsertionColor"]);
      ASSIGN(linkAttr, [aDecoder decodeObjectForKey: @"NSLinkAttributes"]);
      ASSIGN(markAttr, [aDecoder decodeObjectForKey: @"NSMarkedAttributes"]);
      ASSIGN(selectedAttr,
	[aDecoder decodeObjectForKey: @"NSSelectedAttributes"]);
    }
  
  return self;
}

- (void) encodeWithCoder: (NSCoder *)coder
{
  if ([coder allowsKeyedCoding])
    {	
      [coder encodeObject: backgroundColor forKey: @"NSBackgroundColor"];
      [coder encodeObject: paragraphStyle forKey: @"NSDefaultParagraphStyle"];
      [coder encodeInt: flags forKey: @"NSFlags"];
      [coder encodeObject: markAttr forKey: @"NSMarkedAttributes"];
      [coder encodeObject: selectedAttr forKey: @"NSSelectedAttributes"];
      [coder encodeObject: insertionColor forKey: @"NSInsertionColor"];

      // TODO: Encode/Decode link attributes...
    }
}

- (void) dealloc
{
  RELEASE(backgroundColor);
  RELEASE(paragraphStyle);
  RELEASE(insertionColor);
  RELEASE(linkAttr);
  RELEASE(markAttr);
  RELEASE(selectedAttr);
  [super dealloc];
}

- (NSColor *)backgroundColor
{
  return backgroundColor;
}

- (NSParagraphStyle *) paragraphStyle
{
  return paragraphStyle;
}

- (unsigned int) flags
{
  return flags;
}

- (NSColor *) insertionColor
{
  return insertionColor;
}

- (NSArray *) linkAttributes
{
  return linkAttr;
}

- (NSArray *) markAttributes
{
  return markAttr;
}

- (NSArray *) selectedAttributes
{
  return selectedAttr;
}

- (NSTextView *) textView
{
  return textView;
}
@end


/**** Misc. helpers and stuff ****/

static const int currentVersion = 2;

static BOOL noLayoutManagerException(void)
{
  [NSException raise: NSGenericException
	      format: @"Can't edit a NSTextView without a layout manager!"];
  return YES;
}

/* The shared notification center */
static NSNotificationCenter *notificationCenter;

/* Default max. size. Don't change this without understanding and checking
for roundoff issues. Whole points should be representable. */
#define HUGE 1e7


/**** Synchronization stuff ****/

/* For when more than one text view is connected to a layout manager.
Helpers are here, the actual methods are in the main implementation. */
@implementation NSTextView (GSTextViewSync)


#define SET_DELEGATE_NOTIFICATION(notif_name) \
  if ([_delegate respondsToSelector: @selector(text##notif_name:)]) \
    [notificationCenter addObserver: _delegate \
           selector: @selector(text##notif_name:) \
               name: NSText##notif_name##Notification \
             object: _notifObject]

/*
 * Synchronizing flags.  Used to manage synchronizing shared
 * attributes between textviews coupled with the same layout manager.
 * These synchronizing flags are only accessed when
 * _tf.multiple_textviews == YES and this can only happen if we have
 * a non-nil NSLayoutManager - so we don't check. */

/* YES when in the process of synchronizing text view attributes.  
   Used to avoid recursive synchronizations. */
#define IS_SYNCHRONIZING_FLAGS _layoutManager->_isSynchronizingFlags 
/* YES when in the process of synchronizing delegates.
   Used to avoid recursive synchronizations. */ 
#define IS_SYNCHRONIZING_DELEGATES _layoutManager->_isSynchronizingDelegates


/*
This gets sent to all text views connected to a layout manager whenever
a text container is added or removed, or if a text container changes text
view. When a text container is removed, it is also sent to the text view
of the removed text view. It is also sent by -setTextContainer:.

This will be sent several times to the same text view for one change in
some cases, so it needs to be safe wrt. that.
*/
- (void) _updateMultipleTextViews
{
  id oldNotifObject = _notifObject;

  if ([[_layoutManager textContainers] count] > 1)
    {
      _tf.multiple_textviews = YES;
      _notifObject = [_layoutManager firstTextView];
    }
  else
    {
      _tf.multiple_textviews = NO;
      _notifObject = self;
    }  

  /*
  The notifications only need to be reset once for each change, but doing it
  several times doesn't hurt.
  */
  if ((_delegate != nil) && (oldNotifObject != _notifObject))
    {
      [notificationCenter removeObserver: _delegate
	name: nil
	object: oldNotifObject];

      if ([_delegate respondsToSelector:
	    @selector(textView:shouldChangeTextInRange:replacementString:)])
	{
	  _tf.delegate_responds_to_should_change = YES;
	}
      else
	{
	  _tf.delegate_responds_to_should_change = NO;
	}

      /* SET_DELEGATE_NOTIFICATION defined at the beginning of file */

      /* NSText notifications */
      SET_DELEGATE_NOTIFICATION(DidBeginEditing);
      SET_DELEGATE_NOTIFICATION(DidChange);
      SET_DELEGATE_NOTIFICATION(DidEndEditing);
      /* NSTextView notifications */
      SET_DELEGATE_NOTIFICATION(ViewDidChangeSelection);
      SET_DELEGATE_NOTIFICATION(ViewWillChangeNotifyingTextView);
    }
}


/* 
_syncTextViewsCalling:withFlag: calls a set method on all text
views sharing the same layout manager as this one.  It sets the
IS_SYNCHRONIZING_FLAGS flag to YES to prevent recursive calls;
calls the specified action on all the textviews (this one included)
with the specified flag; sets back the IS_SYNCHRONIZING_FLAGS flag
to NO; then returns.

We need to explicitly call the methods - we can't copy the flags
directly from one textview to another - to allow subclasses to
override eg. -setEditable: to take some particular action when
editing is turned on or off.
*/
- (void) _syncTextViewsByCalling: (SEL)action
		       withFlag: (BOOL)flag
{
  NSArray *array;
  int i, count;

  if (IS_SYNCHRONIZING_FLAGS == YES)
    {
      [NSException raise: NSGenericException
	format: @"_syncTextViewsCalling:withFlag: called recursively"];
    }

  array = [_layoutManager textContainers];
  count = [array count];

  IS_SYNCHRONIZING_FLAGS = YES;

  for (i = 0; i < count; i++)
    {
      NSTextView *tv; 
      void (*msg)(id, SEL, BOOL);

      tv = [(NSTextContainer *)[array objectAtIndex: i] textView];
      msg = (void (*)(id, SEL, BOOL))[tv methodForSelector: action];
      if (msg != NULL)
	{
	  (*msg) (tv, action, flag);
	}
      else
	{
	  /* Ahm.  What shall we do here.  It can't happen, can it ? */
	  NSLog(@"Weird error - _syncTextViewsByCalling:withFlag: couldn't find method for selector");
	}
    }

  IS_SYNCHRONIZING_FLAGS = NO;
}


/*
This must be called whenever the delegate changes (directly, through calls
to -setDelegate:, or indirectly due to changes in the text system, or being
decoded.
*/
- (void) _recacheDelegateResponses
{
  SEL selector;

  selector = @selector(textView:shouldChangeTextInRange:replacementString:);
  if ([_delegate respondsToSelector: selector])
    {
      _tf.delegate_responds_to_should_change = YES;
    }
  else
    {
      _tf.delegate_responds_to_should_change = NO;
    }

  selector = @selector(textView:willChangeSelectionFromCharacterRange:toCharacterRange:);
  if ([_delegate respondsToSelector: selector])
    {
      _tf.delegate_responds_to_will_change_sel = YES;
    }
  else
    {
      _tf.delegate_responds_to_will_change_sel = NO;
    }
}


/*
Called when our state needs updating due to external changes. Currently,
this happens when layout has been invalidated, and when we are resized.
*/
- (void) _updateState: (id)sender
{
  [self sizeToFit];
  /* TODO: we don't have to redisplay the entire view */
  [self setNeedsDisplay: YES];
  [self updateInsertionPointStateAndRestartTimer:
    [self shouldDrawInsertionPoint]];
  [self _updateInputMethodState];
}

- (void) _layoutManagerDidInvalidateLayout
{
  /*
  We don't want to do the update right away, since the invalidation might
  be followed by further invalidation if the user of the text system is
  making large rearrangements of the text network. This also makes us a
  lot more forgiving; no real works is done until "later", so the user can
  have the text network in an inconsistent state for short periods of time.
  (This shouldn't be relied on, though. If possible, avoid it.)

  Actually, we want to run as late as possible. However, it seems to me that
  we must run before [NSWindow -_handleWindowNeedsDisplay:] (or that it
  would be a very good idea to do so, since we might end up resizing
  ourselves and stuff like that). Thus, we use -performSelector:... with
  an order 1 under that for window updating.

  If the update method is not called before the real redisplay (if someone
  forces a redisplay right away), we might draw incorrectly, but it shouldn't
  cause any other harm.
  */
  [[NSRunLoop currentRunLoop] cancelPerformSelector: @selector(_updateState:)
    target: self
    argument: nil];
  [[NSRunLoop currentRunLoop]
    performSelector: @selector(_updateState:)
	     target: self
	   argument: nil
	      order: 599999
	      modes: [NSArray arrayWithObjects: /* TODO: set up array in advance */
		       NSDefaultRunLoopMode,
		       NSModalPanelRunLoopMode,
		       NSEventTrackingRunLoopMode, nil]];
}


@end



@implementation NSTextView


/**** Misc. class methods ****/

+(void) initialize
{
  if ([self class] == [NSTextView class])
    {
      [self setVersion: currentVersion];
      notificationCenter = [NSNotificationCenter defaultCenter];
    }
}

static BOOL did_register_for_services;

+(void) registerForServices
{
  NSArray *types;

  did_register_for_services = YES;

  types = [NSArray arrayWithObjects: NSStringPboardType,
		    NSRTFPboardType, NSRTFDPboardType, nil];

  NSAssert(NSApp, @"Called before the shared application object was created.");
  [NSApp registerServicesMenuSendTypes: types
			   returnTypes: types];
}

+(NSDictionary *) defaultTypingAttributes
{
static NSDictionary *defaultTypingAttributes;

  if (!defaultTypingAttributes)
    {
      defaultTypingAttributes = [[NSDictionary alloc] initWithObjectsAndKeys:
	[NSParagraphStyle defaultParagraphStyle], NSParagraphStyleAttributeName,
	[NSFont userFontOfSize: 0], NSFontAttributeName,
	[NSColor textColor], NSForegroundColorAttributeName,
	nil];
    }
  return defaultTypingAttributes;
}


/**** Initialization ****/

/*
Note that -init* must be completely side-effect-less (outside this
NSTextView). In particular, they must _not_ touch the font panel or rulers
until whoever created us has a chance to eg. -setUsesFontPanel: NO.
Calling any other methods here is dangerous as a sub-class might have
overridden them and given them side-effects, so we don't.


Note also that if a text view is added to an existing text network, the
new text view must not change any attributes of the existing text views.
Instead, it sets its own attributes to match the others'. This also applies
when a text view's moves to another text network.

The only method that is allowed to change which text network a text view
belongs to is -setTextContainer:, and it must be called when it changes
(NSLayoutManager and NSTextContainer do this for us).

Since we can't have any side-effects, we can't call methods to set the
values. A sub-class that wants to react to changes caused by moving to
a different text network will have to override -setTextContainer: and do
whatever it needs to do after calling [super setTextContainer: foo].
(TODO: check that this behavior is acceptable)

If a text view is added to an empty text network, it keeps its attributes.
*/


- (NSTextContainer *) buildUpTextNetwork: (NSSize)aSize
{
  NSTextContainer *textContainer;
  NSLayoutManager *layoutManager;
  NSTextStorage *textStorage;

  textStorage = [[NSTextStorage alloc] init];

  layoutManager = [[NSLayoutManager alloc] init];

  [textStorage addLayoutManager: layoutManager];
  RELEASE(layoutManager);

  textContainer = [[NSTextContainer alloc] initWithContainerSize: aSize];
  [layoutManager addTextContainer: textContainer];
  RELEASE(textContainer);

  /* The situation at this point is as follows: 

     textView (us) --RETAINs--> textStorage 
     textStorage   --RETAINs--> layoutManager 
     layoutManager --RETAINs--> textContainer */

  /* We keep a flag to remember that we are directly responsible for 
     managing the text network. */
  _tf.owns_text_network = YES;

  return textContainer;
}


/* Designated initializer. */
- (id) initWithFrame: (NSRect)frameRect
      textContainer: (NSTextContainer *)container
{
  self = [super initWithFrame: frameRect];
  if (!self)
    return nil;

  if (!did_register_for_services)
    [isa registerForServices];

  _minSize = NSMakeSize(0, 0);
  _maxSize = NSMakeSize(HUGE,HUGE);
  _textContainerInset = NSMakeSize(2, 0);

  ASSIGN(_insertionPointColor, [NSColor textColor]);
  ASSIGN(_backgroundColor, [NSColor textBackgroundColor]);

  _tf.draws_background = YES;
  _tf.is_horizontally_resizable = NO;
  _tf.is_vertically_resizable = NO;

  /* We set defaults for all shared attributes here. If container is already
  part of a text network, we reset the attributes in -setTextContainer:. */
  _tf.is_field_editor = NO;
  _tf.is_editable = YES;
  _tf.is_selectable = YES;
  _tf.is_rich_text = YES;
  _tf.imports_graphics = NO;
  _tf.uses_font_panel = YES;
  _tf.uses_ruler = YES;
  _tf.is_ruler_visible = NO;
  _tf.allows_undo = NO;
  _tf.smart_insert_delete = NO;

  [container setTextView: self];
  [self invalidateTextContainerOrigin];

  [self setPostsFrameChangedNotifications: YES];
  [notificationCenter addObserver: self
    selector: @selector(_updateState:)
    name: NSViewFrameDidChangeNotification
    object: self];

  return self;
}


- (id) initWithFrame: (NSRect)frameRect
{
  NSTextContainer *aTextContainer;

  aTextContainer = [self buildUpTextNetwork: frameRect.size];

  self = [self initWithFrame: frameRect  textContainer: aTextContainer];

  /* At this point the situation is as follows: 

     textView (us)  --RETAINs--> textStorage
     textStorage    --RETAINs--> layoutManager 
     layoutManager  --RETAINs--> textContainer 
     textContainer  --RETAINs--> textView (us) */

  /* The text system should be destroyed when the textView (us) is
     released.  To get this result, we send a RELEASE message to us
     breaking the RETAIN cycle. */
  RELEASE(self);

  return self;
}


/*
In earlier versions, some of these ivar:s were in NSText instead of
NSTextView, and parts of their handling (including encoding and decoding)
were there. This has been fixed and the ivar:s moved here, but in a way
that makes decoding and encoding compatible with the old code.
*/
- (void) encodeWithCoder: (NSCoder *)aCoder
{
  BOOL flag;
  NSSize containerSize = [_textContainer containerSize];

  [super encodeWithCoder: aCoder];

  if ([aCoder allowsKeyedCoding])
    {
      NSTextViewSharedData *tvsd = [[NSTextViewSharedData alloc] initWithTextView: self];

      [aCoder encodeConditionalObject: _delegate forKey: @"NSDelegate"];
      [aCoder encodeSize: [self maxSize] forKey: @"NSMaxSize"];
      [aCoder encodeSize: [self minSize] forKey: @"NSMinSize"];
      [aCoder encodeObject: tvsd forKey: @"NSSharedData"];
      [aCoder encodeObject: [self textStorage] forKey: @"NSTextStorage"];
      [aCoder encodeObject: [self textContainer] forKey: @"NSTextContainer"];
      [aCoder encodeInt: 0 forKey: @"NSTVFlags"]; // no delegates, etc... set to zero.      
    }
  else
    {
      [aCoder encodeConditionalObject: _delegate];
      
      flag = _tf.is_field_editor;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_editable;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_selectable;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_rich_text;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.imports_graphics;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.draws_background;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_horizontally_resizable;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_vertically_resizable;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.uses_font_panel;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.uses_ruler;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.is_ruler_visible;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      
      [aCoder encodeObject: _backgroundColor];
      [aCoder encodeValueOfObjCType: @encode(NSSize) at: &_minSize];
      [aCoder encodeValueOfObjCType: @encode(NSSize) at: &_maxSize];
      
      flag = _tf.smart_insert_delete;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = _tf.allows_undo;
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      [aCoder encodeObject: _insertionPointColor];
      [aCoder encodeValueOfObjCType: @encode(NSSize) at: &containerSize];
      flag = [_textContainer widthTracksTextView];
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
      flag = [_textContainer heightTracksTextView];
      [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
    }
}

- (id) initWithCoder: (NSCoder *)aDecoder
{
  self = [super initWithCoder: aDecoder];
  if ([aDecoder allowsKeyedCoding])
    {  
      if ([aDecoder containsValueForKey: @"NSDelegate"])
        {
	  [self setDelegate: [aDecoder decodeObjectForKey: @"NSDelegate"]];
	}

      if ([aDecoder containsValueForKey: @"NSMaxSize"])
        {
	  [self setMaxSize: [aDecoder decodeSizeForKey: @"NSMaxSize"]];
	}

      if ([aDecoder containsValueForKey: @"NSMinize"])
        {
	  // it's NSMinize in pre-10.3 formats.
	  [self setMinSize: [aDecoder decodeSizeForKey: @"NSMinize"]];
	}

      if ([aDecoder containsValueForKey: @"NSMinSize"])
        {
	  // However, if NSMinSize is present we want to use it.
	  [self setMinSize: [aDecoder decodeSizeForKey: @"NSMinSize"]];
	}

      if ([aDecoder containsValueForKey: @"NSSharedData"])
        {
	  NSTextViewSharedData *shared;
	  unsigned int flags;

	  shared = [aDecoder decodeObjectForKey: @"NSSharedData"];
	  flags = [shared flags];
	  ASSIGN(_insertionPointColor, [shared insertionColor]);
	  ASSIGN(_backgroundColor, [shared backgroundColor]);

	  _tf.is_editable = ((0x01 & flags) > 0);
	  _tf.is_selectable = ((0x02 & flags) > 0);
	  _tf.is_rich_text = ((0x04 & flags) > 0);
	  _tf.imports_graphics = ((0x08 & flags) > 0);
	  _tf.is_field_editor = ((0x10 & flags) > 0);
	  _tf.uses_font_panel = ((0x20 & flags) > 0);
	  _tf.is_ruler_visible = ((0x40 & flags) > 0);
	  _tf.uses_ruler = ((0x100 & flags) > 0);
	  _tf.draws_background = ((0x800 & flags) > 0);
	  _tf.smart_insert_delete = ((0x2000000 & flags) > 0);
	  _tf.allows_undo = ((0x40000000 & flags) > 0);	  

	  _tf.owns_text_network = YES;
	  _tf.is_horizontally_resizable = YES;
	  _tf.is_vertically_resizable = YES;
	}

      // currently not used....
      if ([aDecoder containsValueForKey: @"NSTextStorage"])
        {
	  _textStorage = [aDecoder decodeObjectForKey: @"NSTextStorage"];
	}
      
      // currently not used....
      if ([aDecoder containsValueForKey: @"NSTextContainer"])
        {      
	  NSSize size = NSMakeSize(0,_maxSize.height);
	  NSTextContainer *aTextContainer = [self buildUpTextNetwork: NSZeroSize];
	  [aTextContainer setTextView: (NSTextView *)self];
	  /* See initWithFrame: for comments on this RELEASE */
	  RELEASE(self);

	  [aTextContainer setContainerSize: size];
	  [aTextContainer setWidthTracksTextView: YES];
	  [aTextContainer setHeightTracksTextView: NO];
	}

      if ([aDecoder containsValueForKey: @"NSTVFlags"])
        {
	  [aDecoder decodeIntForKey: @"NSTVFlags"];
	}

      // register for services and subscribe to notifications.
      [self _recacheDelegateResponses];
      [self invalidateTextContainerOrigin];

      if (!did_register_for_services)
	[isa registerForServices];

      [self updateDragTypeRegistration];

      [self setPostsFrameChangedNotifications: YES];
      [notificationCenter addObserver: self
			  selector: @selector(_updateState:)
			  name: NSViewFrameDidChangeNotification
			  object: self];
    }
  else
    {
      BOOL flag;
      NSTextContainer *aTextContainer; 
      int version = [aDecoder versionForClassName: 
				  @"NSTextView"];

      /* Common stuff for version 1 and 2. */
      _delegate  = [aDecoder decodeObject];

      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_field_editor = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_editable = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_selectable = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_rich_text = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.imports_graphics = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.draws_background = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_horizontally_resizable = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_vertically_resizable = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.uses_font_panel = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.uses_ruler = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.is_ruler_visible = flag;
      
      _backgroundColor  = RETAIN([aDecoder decodeObject]);
      [aDecoder decodeValueOfObjCType: @encode(NSSize) at: &_minSize];
      [aDecoder decodeValueOfObjCType: @encode(NSSize) at: &_maxSize];
  
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.smart_insert_delete = flag;
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      _tf.allows_undo = flag;

      /* build up the rest of the text system, which doesn't get stored 
	 <doesn't even implement the Coding protocol>. */
      aTextContainer = [self buildUpTextNetwork: _frame.size];
      [aTextContainer setTextView: (NSTextView *)self];
      /* See initWithFrame: for comments on this RELEASE */
      RELEASE(self);

      if (version == currentVersion)
        {
	  NSSize containerSize;
	  	  
	  _insertionPointColor  = RETAIN([aDecoder decodeObject]);
	  [aDecoder decodeValueOfObjCType: @encode(NSSize) at: &containerSize];
	  [aTextContainer setContainerSize: containerSize];

	  [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
	  [aTextContainer setWidthTracksTextView: flag];
	  [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
	  [aTextContainer setHeightTracksTextView: flag];
	}

      [self _recacheDelegateResponses];
      [self invalidateTextContainerOrigin];

      // register for services...
      if (!did_register_for_services)
	[isa registerForServices];

      [self updateDragTypeRegistration];

      [self setPostsFrameChangedNotifications: YES];
      [notificationCenter addObserver: self
			  selector: @selector(_updateState:)
			  name: NSViewFrameDidChangeNotification
			  object: self];
    }

  return self;
}

- (void) dealloc
{
  if (_tf.owns_text_network == YES)
    {
      if (_textStorage != nil)
	{
	  /*
	   * Destroying our _textStorage releases all the text objects
	   * (us included) which means this method will be called again ...
	   * so this time round we should just return, and the rest of
	   * the deallocation can be done on the next call to dealloc.
	   *
	   * However, the dealloc methods of any subclasses should
	   * already have been called before this method is called,
	   * and those subclasses don't know how to cope with being
	   * deallocated more than once ... to deal with that we
	   * set the isa pointer so that the subclass dealloc methods
	   * won't get called again.
	   */
	  isa = [NSTextView class];
	  DESTROY(_textStorage);
	  return;
	}
    }

  [notificationCenter removeObserver: self
    name: NSViewFrameDidChangeNotification
    object: self];
  [[NSRunLoop currentRunLoop] cancelPerformSelector: @selector(_updateState:)
    target: self
    argument: nil];

  if (_delegate)
    {
      [notificationCenter removeObserver: _delegate
	name: nil
	object: _notifObject];
    }

  DESTROY(_selectedTextAttributes);
  DESTROY(_markedTextAttributes);
  DESTROY(_insertionPointColor);
  DESTROY(_backgroundColor);

  [super dealloc];
}

/**** Managing the text network ****/

/* This should only be called by [NSTextContainer -setTextView:]. If the
text container has had its layout manager changed, it will make a dummy call
to this method and container==_textContainer. We still need to do a full
update in that case.

This is assumed to be the __only__ place where _textContainer,
_layoutManager, or _textStorage changes. Re-synchronizing the text network
is hairy, and this is the only place where it happens.

TODO: Make sure the assumption holds; might need to add more dummy calls
to this method from the text container or layout manager.
*/
- (void) setTextContainer: (NSTextContainer *)container
{
  unsigned int i, c;
  NSArray *tcs;
  NSTextView *other;

  /* Any of these three might be nil. */
  _textContainer = container;
  _layoutManager = (NSLayoutManager *)[container layoutManager];
  _textStorage = [_layoutManager textStorage];

  /* Search for an existing text view attached to this layout manager. */
  tcs = [_layoutManager textContainers];
  c = [tcs count];
  for (i = 0; i < c; i++)
    {
      other = [[tcs objectAtIndex: i] textView];
      if (other && other != self)
        break;
    }

  if (i < c)
    {
      /* There is already an NSTextView attached to this text network, so
      all shared attributes, including those in the layout manager, are
      already set up. We copy the shared attributes to us. */

      _delegate = other->_delegate;
      _tf.is_field_editor = other->_tf.is_field_editor;
      _tf.is_editable = other->_tf.is_editable;
      _tf.is_selectable = other->_tf.is_selectable;
      _tf.is_rich_text = other->_tf.is_rich_text;
      _tf.imports_graphics = other->_tf.imports_graphics;
      _tf.uses_font_panel = other->_tf.uses_font_panel;
      _tf.uses_ruler = other->_tf.uses_ruler;
      _tf.is_ruler_visible = other->_tf.is_ruler_visible;
      _tf.allows_undo = other->_tf.allows_undo;
      _tf.smart_insert_delete = other->_tf.smart_insert_delete;

      /* TODO: might need to update other things */
      [self _recacheDelegateResponses];
      [self updateDragTypeRegistration];
    }
  else if (_layoutManager)
    {
      /* There is no text network, and the layout manager's attributes
      might not be set up. We reset them to standard values. */

      DESTROY(_layoutManager->_typingAttributes);

      _layoutManager->_typingAttributes = [[isa defaultTypingAttributes] mutableCopy];
      _layoutManager->_original_selected_range.location = NSNotFound;
      _layoutManager->_selected_range = NSMakeRange(0,0);
    }

  _currentInsertionPointMovementDirection = 0;

  [self _updateMultipleTextViews];
}





- (void) replaceTextContainer: (NSTextContainer *)newContainer
{
  NSLog(@"TODO! [NSTextView -replaceTextContainer:] isn't implemented");
}

- (NSTextContainer *) textContainer
{
  return _textContainer;
}

- (NSLayoutManager *) layoutManager
{
  return _layoutManager;
}

- (NSTextStorage *) textStorage
{
  return _textStorage;
}


/**** Managing shared attributes ****/


/*
Note: You might override these methods in subclasses, as in the
following example:
 - (void) setEditable: (BOOL)flag
 {
   [super setEditable: flag];
   XXX your custom code here XXX
 }

If you override them in this way, they are automatically synchronized
between multiple text views - ie., when it is called on one, it will be
automatically called on all other text views attached to thesame layout
manager.


TODO: Not all combinations of flags are allowed, eg. editable implies
selectable, imports graphics implies rich-text, etc. In these cases, when
making a change that forces a value on another attribute, the attribute is
directly changed. Need to check if we should call the method instead. Need
to make sure syncing is handled properly in all cases.
*/


/* Helper macro for these methods. */
#define NSTEXTVIEW_SYNC \
  if (_tf.multiple_textviews && (IS_SYNCHRONIZING_FLAGS == NO)) \
    {  [self _syncTextViewsByCalling: _cmd  withFlag: flag]; \
    return; }


/* Delegate */

- (id) delegate
{
  return _delegate;
}

- (void) setDelegate: (id)anObject
{
  /* Code to allow sharing the delegate */
  if (_tf.multiple_textviews && (IS_SYNCHRONIZING_DELEGATES == NO))
    {
      /* Invoke setDelegate: on all the textviews which share this
         delegate. */
      NSArray *array;
      int i, count;

      IS_SYNCHRONIZING_DELEGATES = YES;

      array = [_layoutManager textContainers];
      count = [array count];

      for (i = 0; i < count; i++)
	{
	  NSTextView *view;

	  view = [(NSTextContainer *)[array objectAtIndex: i] textView];
	  [view setDelegate: anObject];
	}

      IS_SYNCHRONIZING_DELEGATES = NO;
    }

  /* Now the real code to set the delegate */

  if (_delegate != nil)
    {
      [notificationCenter removeObserver: _delegate
	name: nil
	object: _notifObject];
    }

  _delegate = anObject;

  /* SET_DELEGATE_NOTIFICATION defined near the beginning of file */

  /* NSText notifications */
  SET_DELEGATE_NOTIFICATION(DidBeginEditing);
  SET_DELEGATE_NOTIFICATION(DidChange);
  SET_DELEGATE_NOTIFICATION(DidEndEditing);

  /* NSTextView notifications */
  SET_DELEGATE_NOTIFICATION(ViewDidChangeSelection);
  SET_DELEGATE_NOTIFICATION(ViewWillChangeNotifyingTextView);

  [self _recacheDelegateResponses];
}


/* Editable */

- (BOOL) isEditable
{
  return _tf.is_editable;
}

- (void) setEditable: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.is_editable = flag;
  if (flag)
    {
      _tf.is_selectable = YES;
    }
  if ([self shouldDrawInsertionPoint])
    {
      [self updateInsertionPointStateAndRestartTimer: YES];
    }   
  else
    {
      /* TODO: insertion point */
    }
  [self updateDragTypeRegistration];
}


/* Selectable */

- (BOOL) isSelectable
{
  return _tf.is_selectable;
}

- (void) setSelectable: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.is_selectable = flag;
  if (flag == NO)
    {
      _tf.is_editable = NO;
    }
  [self updateDragTypeRegistration];
}


/* Field editor */

- (BOOL) isFieldEditor
{
  return _tf.is_field_editor;
}

- (void) setFieldEditor: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  [self setHorizontallyResizable: NO]; /* TODO: why? */
  [self setVerticallyResizable: NO];
  [self setTextContainerInset: NSMakeSize(0,0)]; /* TODO: this is kindof ugly */
  _tf.is_field_editor = flag;
}


/* Rich-text */

- (BOOL) isRichText
{
  return _tf.is_rich_text;
}

- (void) setRichText: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.is_rich_text  = flag;
  if (flag == NO)
    {
      _tf.imports_graphics = NO;
      /* TODO: convert text to plain text, ie. make attributes the same in
      all text? */
    }
  [self updateDragTypeRegistration];
}


/* Imports graphics */

- (BOOL) importsGraphics
{
  return _tf.imports_graphics;
}

- (void) setImportsGraphics: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.imports_graphics = flag;
  if (flag == YES)
    {
      _tf.is_rich_text = YES;
    }
  [self updateDragTypeRegistration];
}


/* Uses ruler */

- (BOOL) usesRuler
{
  return _tf.uses_ruler;
}

/* TODO: set ruler visible to NO if flag==NO? */
- (void) setUsesRuler: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.uses_ruler = flag;
}


/* Ruler visible (TODO: is this really supposed to be shared??) */

- (BOOL) isRulerVisible
{
  return _tf.is_ruler_visible;
}

- (void) setRulerVisible: (BOOL)flag
{
  NSScrollView *sv;

  NSTEXTVIEW_SYNC;

  sv = [self enclosingScrollView];
  _tf.is_ruler_visible = flag;
  if (sv != nil)
    {
      [sv setRulersVisible: _tf.is_ruler_visible];
    }
}


/* Uses font panel */

- (BOOL) usesFontPanel
{
  return _tf.uses_font_panel;
}

- (void) setUsesFontPanel: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.uses_font_panel = flag;
}


/* Smart insert/delete */

- (BOOL) smartInsertDeleteEnabled
{
  return _tf.smart_insert_delete;
}

- (void) setSmartInsertDeleteEnabled: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.smart_insert_delete = flag;
}


/* Undo */

- (BOOL) allowsUndo
{
  return _tf.allows_undo;
}

- (void) setAllowsUndo: (BOOL)flag
{
  NSTEXTVIEW_SYNC;
  _tf.allows_undo = flag;
}


/* Continuous spell checking */

/* TODO */
- (BOOL) isContinuousSpellCheckingEnabled
{
  NSLog(@"Method %s is not implemented for class %s",
	__PRETTY_FUNCTION__, "NSTextView");
  return NO;
}

- (void) setContinuousSpellCheckingEnabled: (BOOL)flag
{
  NSLog(@"Method %s is not implemented for class %s",
	__PRETTY_FUNCTION__, "NSTextView");
}


/* Don't need this anymore. */
#undef NSTEXTVIEW_SYNC



/**** Basic view stuff ****/

- (BOOL) isFlipped
{
  return YES;
}

- (BOOL) isOpaque
{
  if (_tf.draws_background == NO
      || _backgroundColor == nil
      || [_backgroundColor alphaComponent] < 1.0)
    return NO;
  else
    return YES;
}

- (BOOL) needsPanelToBecomeKey
{
  return _tf.is_editable;
}

- (BOOL) acceptsFirstResponder
{
  if (_tf.is_selectable)
    {
      return YES;
    }
  else
    {
      return NO;
    }
}

- (BOOL) resignFirstResponder
{
  /* Check if another text view attached to the same layout manager is the
  new first responder. If so, we always let it become first responder, and
  we don't send any notifications. */
  if (_tf.multiple_textviews == YES)
    {
      id futureFirstResponder;
      NSArray *textContainers;
      int i, count;
      
      futureFirstResponder = [_window _futureFirstResponder];
      textContainers = [_layoutManager textContainers];
      count = [textContainers count];
      for (i = 0; i < count; i++)
	{
	  NSTextContainer *container;
	  NSTextView *view;
	  
	  container = (NSTextContainer *)[textContainers objectAtIndex: i];
	  view = [container textView];

	  if (view == futureFirstResponder)
	    {
	      /* NB: We do not reset the BEGAN_EDITING flag so that no
		 spurious notification is generated. */
	      return YES;
	    }
	}
    }


  /* NB: Possible change: ask always - not only if editable - but we
     need to change NSTextField etc to allow this. */
  if ((_tf.is_editable)
      && ([_delegate respondsToSelector: @selector(textShouldEndEditing:)])
      && ([_delegate textShouldEndEditing: self] == NO))
    {
      return NO;
    }


  /* Add any clean-up stuff here */

  if ([self shouldDrawInsertionPoint])
    {
      [self updateInsertionPointStateAndRestartTimer: NO];
    }    

  if (_layoutManager != nil)
    {
      _layoutManager->_beganEditing = NO;
    }

  /* NB: According to the doc (and to the tradition), we post this
     notification even if no real editing was actually done (only
     selection of text) [Note: in this case, no editing was started,
     so the notification does not come after a
     NSTextDidBeginEditingNotification!].  The notification only means
     that we are resigning first responder status.  This makes sense
     because many objects inside the gui need this notification anyway
     - typically, it is needed to remove a field editor (editable or
     not) when the user presses TAB to move to the next view.  Anyway
     yes, the notification name is misleading. */
  [notificationCenter postNotificationName: NSTextDidEndEditingNotification
      object: _notifObject];

  return YES;
}

/* Note that when this method is called, editing might already have
started (in another text view attached to the same layout manager). */
- (BOOL) becomeFirstResponder
{
  if (_tf.is_selectable == NO)
    {
      return NO;
    }

  /* Note: Notifications (NSTextBeginEditingNotification etc) are sent
  the first time the user tries to edit us. */

  /* Draw selection, update insertion point */
  if ([self shouldDrawInsertionPoint])
    {
      [self updateInsertionPointStateAndRestartTimer: YES];
    }

  return YES;
}

- (void) resignKeyWindow
{
  if ([self shouldDrawInsertionPoint])
    {
      [self updateInsertionPointStateAndRestartTimer: NO];
    }
}

- (void) becomeKeyWindow
{
  if ([self shouldDrawInsertionPoint])
    {
      [self updateInsertionPointStateAndRestartTimer: YES];
    }
}


/**** Unshared attributes ****/

- (NSColor *) backgroundColor
{
  return _backgroundColor;
}

- (BOOL) drawsBackground
{
  return _tf.draws_background;
}

- (void) setBackgroundColor: (NSColor *)color
{
  if (![_backgroundColor isEqual: color])
    {
      ASSIGN(_backgroundColor, color);
      [self setNeedsDisplay: YES];
    }
}

- (void) setDrawsBackground: (BOOL)flag
{
  if (_tf.draws_background != flag)
    {
      _tf.draws_background = flag;
      [self setNeedsDisplay: YES];
    }
}


- (void) setInsertionPointColor: (NSColor *)color
{
  ASSIGN(_insertionPointColor, color);
}

- (NSColor *) insertionPointColor
{
  return _insertionPointColor;
}


- (void) setSelectedTextAttributes: (NSDictionary *)attributeDictionary
{
  ASSIGN(_selectedTextAttributes, attributeDictionary);
}

- (NSDictionary *) selectedTextAttributes
{
  return _selectedTextAttributes;
}


- (void) setMarkedTextAttributes: (NSDictionary *)attributeDictionary
{
  ASSIGN(_markedTextAttributes, attributeDictionary);
}

- (NSDictionary *) markedTextAttributes
{
  return _markedTextAttributes;
}



/**** Size management ****/

/*
If we are the document view of a clip view, we always have an effective
minimum size of the clip view's bounds size. This ensures that we always
fill the clip view with our background, and that we always handle clicks
events everywhere inside it (and not just on a small part of it if we are
partially filled with text and track the text container vertically).

Note that this only happens if the text view is the document view of a clip
view; if several text views are embedded in a clip view (eg. a multi-column
text document in a scroll view), we do _not_ want to extend any of the text
views to cover the entire clip view.

TODO: what if the max. size is smaller than the effective min. size?


TODO: Check and fix bounds vs. frame issues.
*/


/* TODO: The safety calls below don't protect against all misuse (doing that
would be very tricky), so is it worth having them there at all? The docs are
pretty clear about what happens (ie. breakage) if you set the flags
incorrectly. */
- (void) setHorizontallyResizable: (BOOL)flag
{
  /* Safety call */
  [_textContainer setWidthTracksTextView: !flag];

  _tf.is_horizontally_resizable = flag;
}
- (void) setVerticallyResizable: (BOOL)flag
{
  /* Safety call */
  [_textContainer setHeightTracksTextView: !flag];

  _tf.is_vertically_resizable = flag;
}
- (BOOL) isHorizontallyResizable
{
  return _tf.is_horizontally_resizable;
}
- (BOOL) isVerticallyResizable
{
  return _tf.is_vertically_resizable;
}


- (NSSize) maxSize
{
  return _maxSize;
}
- (NSSize) minSize
{
  return _minSize;
}
- (void) setMaxSize: (NSSize)newMaxSize
{
  _maxSize = newMaxSize;
}
- (void) setMinSize: (NSSize)newMinSize
{
  _minSize = newMinSize;
}


- (void) sizeToFit
{
  NSSize size;

  if (!_layoutManager)
    return;

  size = _bounds.size;

  if (_tf.is_horizontally_resizable || _tf.is_vertically_resizable)
    {
      NSRect r = [_layoutManager usedRectForTextContainer: _textContainer];
      NSSize s2;
      if (_textContainer == [_layoutManager extraLineFragmentTextContainer])
	{
	  r = NSUnionRect(r, [_layoutManager extraLineFragmentUsedRect]);
	}

      s2 = NSMakeSize(NSMaxX(r), NSMaxY(r));

      if (_tf.is_horizontally_resizable)
	size.width = s2.width + 2 * _textContainerInset.width;

      if (_tf.is_vertically_resizable)
	size.height = s2.height + 2 * _textContainerInset.height;
    }

  [self setConstrainedFrameSize: size];
}

/*
TODO: There is code in TextEdit that implies that the minimum size is
mostly ignored, and that the size of the containing clip view is always
used instead. Should test on OS to find out what the proper behavior is.

UPDATE: current behavior is correct, but must be documented properly
before this TODO can be removed
*/
- (void) setConstrainedFrameSize: (NSSize)desiredSize
{
  NSSize newSize;
  NSSize effectiveMinSize = _minSize;
  NSClipView *cv = (NSClipView *)[self superview];

  if (cv && [cv isKindOfClass: [NSClipView class]] &&
      [cv documentView] == self)
    {
      NSSize b = [cv bounds].size;
      effectiveMinSize.width  = MAX(effectiveMinSize.width , b.width);
      effectiveMinSize.height = MAX(effectiveMinSize.height, b.height);
    }

  if (_tf.is_horizontally_resizable)
    {
      newSize.width = desiredSize.width;
      newSize.width = MAX(newSize.width, effectiveMinSize.width);
      newSize.width = MIN(newSize.width, _maxSize.width);
    }
  else
    {
      newSize.width  = _frame.size.width;
    }

  if (_tf.is_vertically_resizable)
    {
      newSize.height = desiredSize.height;
      newSize.height = MAX(newSize.height, effectiveMinSize.height);
      newSize.height = MIN(newSize.height, _maxSize.height);
    }
  else
    {
      newSize.height = _frame.size.height;
    }

  if (NSEqualSizes(_frame.size, newSize) == NO)
    {
      [self setFrameSize: newSize];
    }
}



/**** Text container origin ****/

/*
The text container origin is the origin of the text container's coordinate
system in our coordinate system.
*/

- (void) setTextContainerInset: (NSSize)inset
{
  _textContainerInset = inset;
  [self invalidateTextContainerOrigin];
  /* We send this so our text container can react to the change (it might
  need to resize itself it it's set to track our size). */
  [notificationCenter postNotificationName: NSViewFrameDidChangeNotification
      object: self];
}

- (NSSize) textContainerInset
{
  return _textContainerInset;
}

- (NSPoint) textContainerOrigin
{
  return _textContainerOrigin;
}

/*
TODO: There used to be a bunch of complex code in here, but I couldn't
really see what it did, and I didn't see anything in the docs that imply
that anything complex needs to be done, so I removed it. Should double-check
and bring it back if necessary.
*/
- (void) invalidateTextContainerOrigin
{
  _textContainerOrigin.x = NSMinX(_bounds);
  _textContainerOrigin.x += _textContainerInset.width;

  _textContainerOrigin.y = NSMinY(_bounds);
  _textContainerOrigin.y += _textContainerInset.height;
}



/**** Methods of the NSTextInput protocol ****/

/* -selectedRange is a part of this protocol, but it's also a method in
NSText. The implementation is among the selection handling methods and not
here. */

/* TODO: currently no support for marked text */

- (NSAttributedString *) attributedSubstringFromRange: (NSRange)theRange
{
  if (theRange.location >= [_textStorage length])
    return nil;
  if (theRange.location + theRange.length > [_textStorage length])
    theRange.length = [_textStorage length] - theRange.location;
  return [_textStorage attributedSubstringFromRange: theRange];
}

/*
TODO: make sure this is only called when _layoutManager is known non-nil,
or add guards
*/
- (unsigned int) characterIndexForPoint: (NSPoint)point
{
  unsigned	index;
  float		fraction;

  point.x -= _textContainerOrigin.x;
  point.y -= _textContainerOrigin.y;

  index = [_layoutManager glyphIndexForPoint: point 
			     inTextContainer: _textContainer
	      fractionOfDistanceThroughGlyph: &fraction];
  if (index == (unsigned int)-1)
    return (unsigned int)-1;

  index = [_layoutManager characterIndexForGlyphAtIndex: index];
  if (fraction > 0.5 && index < [_textStorage length])
    {
      index++;
    }
  return index;
}

- (NSRange) markedRange
{
  return NSMakeRange(NSNotFound, 0);
}

- (void) setMarkedText: (id)aString  selectedRange: (NSRange)selRange
{
}

- (BOOL) hasMarkedText
{
  return NO;
}

- (void) unmarkText
{
}

- (NSArray *) validAttributesForMarkedText
{
  return nil;
}

- (long int) conversationIdentifier
{
  return (long int)_textStorage;
}

- (NSRect) firstRectForCharacterRange: (NSRange)theRange
{
  unsigned int rectCount = 0; /* If there's no layout manager, it'll be 0 after the call too. */
  NSRect *rects = [_layoutManager 
		      rectArrayForCharacterRange: theRange
		      withinSelectedCharacterRange: NSMakeRange(NSNotFound, 0)
		      inTextContainer: _textContainer
		      rectCount: &rectCount];

  if (rectCount)
    return rects[0];
  else
    return NSZeroRect;
}

/* Unlike NSResponder, we should _not_ send the selector down the responder
chain if we can't handle it. */
- (void) doCommandBySelector: (SEL)aSelector
{
  if (!_layoutManager)
    {
      NSBeep();
      return;
    }

  /* Give the delegate a chance to handle it. */
  if ([_delegate respondsToSelector: @selector(textView:doCommandBySelector:)]
      && [_delegate textView: _notifObject
            doCommandBySelector: aSelector])
    {
      return;
    }
  if ([self respondsToSelector: aSelector])
    {
      [self performSelector: aSelector];
    }
  else
    {
      NSBeep();
    }
}

/* insertString may actually be an NSAttributedString. If it is, and the
text view isn't rich-text, we ignore the attributes and use the typing
attributes.

This method is for user changes; see NSTextView_actions.m.
*/
- (void) insertText: (id)insertString
{
  NSRange insertRange = [self rangeForUserTextChange];
  NSString *string;
  BOOL isAttributed;

  if (insertRange.location == NSNotFound)
    {
      NSBeep();
      return;
    }

  isAttributed = [insertString isKindOfClass: [NSAttributedString class]];

  if (isAttributed)
    string = [(NSAttributedString *)insertString string];
  else
    string = insertString;

  if (![self shouldChangeTextInRange: insertRange
		   replacementString: string])
    {
      return;
    }

  if (_tf.is_rich_text)
    {
      if (isAttributed)
	{
	  [_textStorage replaceCharactersInRange: insertRange
	    withAttributedString: (NSAttributedString *)insertString];
	}
      else
	{
	  [_textStorage replaceCharactersInRange: insertRange
	    withAttributedString: AUTORELEASE([[NSAttributedString alloc]
	      initWithString: insertString
	      attributes: _layoutManager->_typingAttributes])];
	}
    }
  else
    {
      if (isAttributed)
	{
	  [self replaceCharactersInRange: insertRange
	    withString: [(NSAttributedString *)insertString string]];
	}
      else
	{
	  [self replaceCharactersInRange: insertRange
	    withString: insertString];
	}
    }

  [self didChangeText];
}


/**** Text modification methods (programmatic) ****/

/* These are methods for programmatic changes, ie. they do _not_ check
with the delegate, they don't send notifications, and they work in un-
editable text views, etc. */


/*
Replace the characters in the given range with the given string.

In a non-rich-text view, we use the same attributes as the rest of the
text storage (ie. the typing attributes).

In a rich-text text view, attributes for the new characters are computed
thusly:

1. If there is a first character in the replaced range, its attributes are
   used.

   (If not, the range must have length 0.)

2. If there is a character right before the range, its attributed are used.

   (If not, the range must have location 0, so the range must be length=0,
   location=0.)

3. If there is a character after the range, we use its attributes.

   (If not, the text storage must be empty.)

4. We use the typing attributes. (Note that if the text storage is empty,
   this is the only valid case.)

Since 1. - 3. correspond to the normal NSMutableAttributedString
behavior, we only need to handle 4. explicitly, and we can detect it
by checking if the text storage is empty.

*/
- (void) replaceCharactersInRange: (NSRange)aRange
		       withString: (NSString *)aString
{
  if (aRange.location == NSNotFound) /* TODO: throw exception instead? */
    return;

  if ([_textStorage length] == 0)
    {
      NSAttributedString *as;
      as = [[NSAttributedString alloc]
	initWithString: aString
	attributes: _layoutManager->_typingAttributes];
      [_textStorage replaceCharactersInRange: aRange
	withAttributedString: as];
      DESTROY(as);
    }
  else
    {
      [_textStorage replaceCharactersInRange: aRange
        withString: aString];
    }
}

/*
GNUstep extension. Like the above, but uses the attributes from the
string if the text view is rich-text, and otherwise the typing
attributes.
*/
- (void) replaceCharactersInRange: (NSRange)aRange
	    withAttributedString: (NSAttributedString *)aString
{
  if (aRange.location == NSNotFound) /* TODO: throw exception instead? */
    return;

  if (_tf.is_rich_text)
    {
      [_textStorage replaceCharactersInRange: aRange
        withAttributedString: aString];
    }
  else
    {
      /* Let the other method deal with the empty text storage case. */
      [self replaceCharactersInRange: aRange
        withString: [aString string]];
    }
}


/*
Some attribute-modification methods.

The range-less methods change the attribute for all text and update the
typing attributes.

The range methods, which only work in rich-text text views, only change
the attributes for the range, and do not update the typing attributes.
*/


- (void) setFont: (NSFont *)font
{
  if (!font)
    return;

  [_textStorage addAttribute: NSFontAttributeName
    value: font
    range: NSMakeRange(0,[_textStorage length])];
  [_layoutManager->_typingAttributes setObject: font
    forKey: NSFontAttributeName];
}

- (void) setFont: (NSFont *)font  range: (NSRange)aRange
{
  if (!_tf.is_rich_text || !font)
    return;

  [_textStorage addAttribute: NSFontAttributeName
    value: font
    range: aRange];
}


- (void) setAlignment: (NSTextAlignment)alignment
{
  NSParagraphStyle *style;
  NSMutableParagraphStyle *mstyle;
  
  [_textStorage setAlignment: alignment
    range: NSMakeRange(0, [_textStorage length])];

  /* Update the typing attributes. */
  style = [_layoutManager->_typingAttributes objectForKey: NSParagraphStyleAttributeName];
  if (style == nil)
    style = [NSParagraphStyle defaultParagraphStyle];

  mstyle = [style mutableCopy];

  [mstyle setAlignment: alignment];
  [_layoutManager->_typingAttributes setObject: mstyle
    forKey: NSParagraphStyleAttributeName];
  DESTROY(mstyle);
}

- (void) setAlignment: (NSTextAlignment)alignment
	       range: (NSRange)range
{
  if (!_tf.is_rich_text)
    return;

  [_textStorage setAlignment: alignment range: range];
}


- (void) setTextColor: (NSColor *)color
{
  if (!color)
    {
      [_textStorage removeAttribute: NSForegroundColorAttributeName
	range: NSMakeRange(0, [_textStorage length])];
      [_layoutManager->_typingAttributes
	removeObjectForKey: NSForegroundColorAttributeName];
    }
  else
    {
      [_textStorage addAttribute: NSForegroundColorAttributeName
	value: color
	range: NSMakeRange(0, [_textStorage length])];
      [_layoutManager->_typingAttributes setObject: color
	forKey:  NSForegroundColorAttributeName];
    }
}

- (void) setTextColor: (NSColor *)color  range: (NSRange)aRange
{
  if (!_tf.is_rich_text)
    return;

  if (color)
    {
      [_textStorage addAttribute: NSForegroundColorAttributeName
	value: color
	range: aRange];
    }
  else
    {
      [_textStorage removeAttribute: NSForegroundColorAttributeName
	range: aRange];
    }
}



/**** Text access methods ****/

- (NSData *) RTFDFromRange: (NSRange)aRange
{
  return [_textStorage RTFDFromRange: aRange  documentAttributes: nil];
}

- (NSData *) RTFFromRange: (NSRange)aRange
{
  return [_textStorage RTFFromRange: aRange  documentAttributes: nil];
}

- (NSString *) string
{
  return [_textStorage string];
}

- (unsigned) textLength
{
  return [_textStorage length];
}


- (NSFont *) font
{
  if ([_textStorage length] > 0)
    {
      return [_textStorage attribute: NSFontAttributeName
			     atIndex: 0
		      effectiveRange: NULL];
    }

  return [_layoutManager->_typingAttributes
	   objectForKey: NSFontAttributeName];
}

/*
Returns alignment of first selected paragraph (which will be the alignment
for all text in a non-rich-text text view).

Since the alignment of the typing attributes will always be the same as the
alignment of the first selected paragraph, we can simply return the typing
attributes' alignment. (TODO: double-check this assumption)
*/
- (NSTextAlignment) alignment
{
  return [[_layoutManager->_typingAttributes objectForKey: NSParagraphStyleAttributeName] 
	   alignment];
}

- (NSColor *) textColor
{
  if ([_textStorage length] > 0)
    {
      return [_textStorage attribute: NSForegroundColorAttributeName
			     atIndex: 0
		      effectiveRange: NULL];
    }
  return [_layoutManager->_typingAttributes
	   objectForKey: NSForegroundColorAttributeName];
}



/**** Pasteboard actions ****/

/*
TODO:
Move to NSTextView_actions.m?
*/

- (void) copy: (id)sender
{  
  NSMutableArray *types = [NSMutableArray array];

  if (_tf.imports_graphics)
    [types addObject: NSRTFDPboardType];

  if (_tf.is_rich_text)
    [types addObject: NSRTFPboardType];

  [types addObject: NSStringPboardType];

  [self writeSelectionToPasteboard: [NSPasteboard generalPasteboard]
			     types: types];
}

/* Copy the current font to the font pasteboard */
- (void) copyFont: (id)sender
{
  NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSFontPboard];

  [self writeSelectionToPasteboard: pb
			      type: NSFontPboardType];
}

/* Copy the current ruler settings to the ruler pasteboard */
- (void) copyRuler: (id)sender
{
  NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSRulerPboard];

  [self writeSelectionToPasteboard: pb
			      type: NSRulerPboardType];
}


- (void) paste: (id)sender
{
  [self readSelectionFromPasteboard: [NSPasteboard generalPasteboard]];
}

- (void) pasteFont: (id)sender
{
  NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSFontPboard];

  [self readSelectionFromPasteboard: pb
			       type: NSFontPboardType];
}

- (void) pasteRuler: (id)sender
{
  NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSRulerPboard];

  [self readSelectionFromPasteboard: pb
			       type: NSRulerPboardType];
}

- (void) pasteAsPlainText: (id)sender
{
  [self readSelectionFromPasteboard: [NSPasteboard generalPasteboard]
			       type: NSStringPboardType];
}

- (void) pasteAsRichText: (id)sender
{
  [self readSelectionFromPasteboard: [NSPasteboard generalPasteboard]
			       type: NSRTFPboardType];
}



/**** Handling user changes ****/



/*
 * Began editing flag.  There are quite some different ways in which
 * editing can be started.  Each time editing is started, we need to check
 * with the delegate if it is OK to start editing - but we need to check 
 * only once.  So, we use a flag.  */
/* TODO: comment seems incorrect. macros are only used here. _beganEditing
flag is set to NO in -resignFirstResponder. */


/* YES when editing has already began.  If NO, then we need to ask to
   the delegate for permission to begin editing before allowing any
   change to be made.  We explicitly check for a layout manager, and
   raise an exception if not found. */
#define BEGAN_EDITING \
  (_layoutManager ? _layoutManager->_beganEditing : noLayoutManagerException ())
#define SET_BEGAN_EDITING(X) \
  if (_layoutManager != nil) _layoutManager->_beganEditing = X


/*
Whenever text is to be changed due to some user-induced action, this method
should be called with information on the change. This method will check
if the change is allowed (by checking if the text view is editable and by
asking the delegate for permission). It will return YES if the change is
allowed. It will also send notifications as necessary.

replacementString should be the string that will replace the affected range
(disregarding attributes), or nil if only attributes are changed.

If the affected range or replacement string can't be determined, pass in
NSNotFound for the range's location and nil for the string. (Ie. even if
you know the range, you should pass in NSNotFound so the delegate can tell
the difference between a pure attribute change and an unknown change.)


TODO: What if the view isn't first responder? It should be impossible for
a user change to occur in that case, but user change methods might be
called anyway.

To be safe, changes are currently always disallowed if the text view
isn't the first responder.

(2003-02-01): GNUMail does it by having an "attach" button when editing
mails. It adds an attachment to the text using -insertText:, and it is
a fairly reasonable thing to do.

Thus, if we aren't the first responder, we still proceed as normal here.
In -didChangeText, if we still aren't the first responder, we send the
TextDidEndEditing notification _without_ asking the delegate
(-; since we can't handle a NO return).
*/
- (BOOL) shouldChangeTextInRange: (NSRange)affectedCharRange
	      replacementString: (NSString *)replacementString
{
  BOOL result = YES;

  if (_tf.is_editable == NO)
    return NO;

  /*
  We need to send the textShouldBeginEditing: /
  textDidBeginEditingNotification only once.
  */

  if (BEGAN_EDITING == NO)
    {
      if (([_delegate respondsToSelector: @selector(textShouldBeginEditing:)])
	  && ([_delegate textShouldBeginEditing: _notifObject] == NO))
	return NO;
      
      SET_BEGAN_EDITING(YES);
      
      [notificationCenter postNotificationName: NSTextDidBeginEditingNotification
	object: _notifObject];
    }

  if (_tf.delegate_responds_to_should_change)
    {
      result = [_delegate textView: self
	    shouldChangeTextInRange: affectedCharRange
	          replacementString: replacementString];
    }

  if (result && [self allowsUndo])
    {
      NSUndoManager *undo;
      NSRange undoRange;
      NSAttributedString *undoString;

      // FIXME: Not sure, if this rather belongs into a local implementation of
      //  the method undoManager.
      if (![_delegate respondsToSelector: @selector(undoManagerForTextView:)]
	  || ((undo = [_delegate undoManagerForTextView: self]) == nil))
        {
	  undo = [self undoManager];
	}

      // The length of the undoRange is the length of the replacement, if any.
      if (replacementString != nil)
        {
	  undoRange = NSMakeRange(affectedCharRange.location, 
				  [replacementString length]);
	}
      else
        {
	  undoRange = affectedCharRange;
	}
      undoString = [self attributedSubstringFromRange: affectedCharRange];
      [[undo prepareWithInvocationTarget: self] replaceCharactersInRange: undoRange
						withAttributedString: undoString];
    }

  return result;
}

/*
After each user-induced change, this method should be called.
*/
- (void) didChangeText
{
  [self scrollRangeToVisible: [self selectedRange]];
  [notificationCenter postNotificationName: NSTextDidChangeNotification
    object: _notifObject];

  if ([_window firstResponder] != self)
    { /* Copied from -resignFirstResponder . See comment above. */
      if ([self shouldDrawInsertionPoint])
	{
	  [self updateInsertionPointStateAndRestartTimer: NO];
	}

      if (_layoutManager != nil)
	{
	  _layoutManager->_beganEditing = NO;
	}

      [notificationCenter postNotificationName: NSTextDidEndEditingNotification
	object: _notifObject];
    }
}

/*
Returns the ranges to which various kinds of user changes should apply.
*/

- (NSRange) rangeForUserCharacterAttributeChange
{
  if (!_tf.is_editable || !_tf.uses_font_panel || !_layoutManager)
    {
      return NSMakeRange(NSNotFound, 0);
    }

  if (_tf.is_rich_text)
    {
      return _layoutManager->_selected_range;
    }
  else
    {
      return NSMakeRange(0, [_textStorage length]);
    }
}

- (NSRange) rangeForUserParagraphAttributeChange
{
  if (!_tf.is_editable || !_tf.uses_ruler || !_layoutManager)
    {
      return NSMakeRange(NSNotFound, 0);
    }

  if (_tf.is_rich_text)
    {
      return [self selectionRangeForProposedRange: _layoutManager->_selected_range
				      granularity: NSSelectByParagraph];
    }
  else
    {
      return NSMakeRange(0, [_textStorage length]);
    }
}

- (NSRange) rangeForUserTextChange
{
  if (!_tf.is_editable || !_layoutManager)
    {
      return NSMakeRange(NSNotFound, 0);
    }  

  return _layoutManager->_selected_range;
}



/**** Misc. ****/

/*
Scroll so that the beginning of the range is visible.
*/
- (void) scrollRangeToVisible: (NSRange)aRange
{
  NSRect rect, r;
  NSView *cv;
  float width;
  NSPoint p0, p1;

  /*
  Make sure that our size is up-to-date. If the scroll is in response to
  a change, the delayed size updating might not have run yet. To avoid
  scrolling outside the view, we force an update now.

  (An alternative would be to delay the scroll, too. If problems using
  this method turn up, it could be changed.)
  */
  [self sizeToFit];

  if (aRange.length > 0)
    {
      aRange.length = 1;
      rect = [self rectForCharacterRange: aRange];
    }
  else
    {
      rect = [_layoutManager
	insertionPointRectForCharacterIndex: aRange.location
			    inTextContainer: _textContainer];
      rect.origin.x += _textContainerOrigin.x;
      rect.origin.y += _textContainerOrigin.y;
    }

  cv = [self superview];

  /*
  If we are a non-rich-text field editor in a clip view, we use some
  magic to get scrolling to behave better; if not, just scroll and return.
  */
  if (!_tf.is_field_editor || _tf.is_rich_text
      || ![cv isKindOfClass: [NSClipView class]])
    {
      [self scrollRectToVisible: rect];
      return;
    }

  /*
  The basic principle is that we want to keep as much text as possible
  visible, and we want the text to appear to keep its alignment. This is
  especially important for centered text where the auto-scrolling will
  scroll so it appears right- or left-aligned if we don't do anything here.
  We also want to avoid spurious scrolling when the user is just moving
  the insertion point.
  */

  width = [cv frame].size.width;

  /* Get the left and right edges of the text. */
  r = [_layoutManager
	insertionPointRectForCharacterIndex: 0
			    inTextContainer: _textContainer];
  p0 = r.origin;
  r = [_layoutManager
	insertionPointRectForCharacterIndex: [_textStorage length]
			    inTextContainer: _textContainer];
  p1 = r.origin;
  p1.x += r.size.width;

  /* We only try to be smart for single-line text. */
  if (p0.y != p1.y)
    {
      [self scrollRectToVisible: rect];
      return;
    }

  p0.x += _textContainerOrigin.x;
  p1.x += _textContainerOrigin.x;
  switch ([self alignment])
    {
      case NSLeftTextAlignment:
      case NSNaturalTextAlignment: /* TODO? check default writing direction
				   for language? */
      case NSJustifiedTextAlignment:
	/* We don't want blank space to the right of the text; scroll
	further to the left if possible. */
	p1.x -= width;
	if (p1.x < 0)
	  p1.x = 0;

	if (p1.x < rect.origin.x)
	  {
	    rect.size.width += rect.origin.x - p1.x;
	    rect.origin.x = p1.x;
	  }

	break;

      case NSRightTextAlignment:
	/* We don't want blank space to the left of the text; scroll further
	to the right if possible. */
	p0.x += width;
	if (p0.x > p1.x)
	  p0.x = p1.x;

	if (p0.x > NSMaxX(rect))
	  {
	    rect.size.width += p0.x - NSMaxX(rect);
	  }

	break;

      case NSCenterTextAlignment:
	/* If all the text fits in the clip view, just center on the text. */
	if (p1.x - p0.x <= width)
	  {
	    rect.origin.x = (p1.x + p0.x - width) / 2;
	    rect.size.width = width;
	  }
	else
	  {
	    /* Otherwise, fill the clip view with text; no blank space on
	    either side. */
	    float x;

	    x = p1.x - width;
	    if (x < rect.origin.x)
	      {
		rect.size.width += rect.origin.x - x;
		rect.origin.x = x;
	      }
	    x = p0.x + width;
	    if (x > NSMaxX(rect))
	      {
		rect.size.width += x - NSMaxX(rect);
	      }
	  }
	break;
    }

  [self scrollRectToVisible: rect];
}


/* Private, internal methods to help input method handling in some backends
(XIM, currently). Backends may override these in categories with the real
(backend-specific) handling. */

- (void) _updateInputMethodState
{
}
- (void) _updateInputMethodWithInsertionPoint: (NSPoint)insertionPoint
{
}

@end


/**** TODO: below this line hasn't been done yet ****/


/* not the same as NSMakeRange! */
static inline
NSRange MakeRangeFromAbs (unsigned a1, unsigned a2)
{
  if (a1 < a2)
    return NSMakeRange(a1, a2 - a1);
  else
    return NSMakeRange(a2, a1 - a2);
}



@implementation NSTextView (leftovers)


/**** Misc. stuff not yet categorized ****/

/*
This method is for user changes; see NSTextView_actions.m.
*/
- (void) changeColor: (id)sender
{
  NSColor *aColor = (NSColor *)[sender color];
  NSRange aRange = [self rangeForUserCharacterAttributeChange];

  if (aRange.location == NSNotFound)
    return;

  if (![self shouldChangeTextInRange: aRange
		   replacementString: nil])
    return;
  [self setTextColor: aColor
	       range: aRange];
  [self didChangeText];
}

/*
This method is for user changes; see NSTextView_actions.m.
*/
- (void) changeFont: (id)sender
{
  NSRange foundRange;
  unsigned int maxSelRange;
  NSRange aRange= [self rangeForUserCharacterAttributeChange];
  NSRange searchRange = aRange;
  NSFont *font;

  if (aRange.location == NSNotFound)
    return;

  if (![self shouldChangeTextInRange: aRange  replacementString: nil])
    return;

  [_textStorage beginEditing];
  for (maxSelRange = NSMaxRange (aRange);
       searchRange.location < maxSelRange;
       searchRange = NSMakeRange (NSMaxRange (foundRange),
				  maxSelRange - NSMaxRange (foundRange)))
    {
      font = [_textStorage attribute: NSFontAttributeName
			   atIndex: searchRange.location
			   longestEffectiveRange: &foundRange
			   inRange: searchRange];
      if (font != nil)
	{
	  [self setFont: [sender convertFont: font]  ofRange: foundRange];
	}
    }
  [_textStorage endEditing];
  [self didChangeText];
  /* Set typing attributes */
  font = [_layoutManager->_typingAttributes objectForKey: NSFontAttributeName];
  if (font != nil)
    {
      [_layoutManager->_typingAttributes setObject: [sender convertFont: font] 
			 forKey: NSFontAttributeName];
    }
}


/*
 * [NSText] Reading and Writing RTFD files
 */
- (BOOL) readRTFDFromFile: (NSString *)path
{
  NSAttributedString *peek;

  peek = [[NSAttributedString alloc] initWithPath: path 
				     documentAttributes: NULL];
  if (peek != nil)
    {
      if (!_tf.is_rich_text)
	{
	  [self setRichText: YES];
	}
      [self replaceCharactersInRange: NSMakeRange (0, [_textStorage length])
		withAttributedString: peek];
      RELEASE(peek);
      return YES;
    }
  return NO;
}

- (BOOL) writeRTFDToFile: (NSString *)path  atomically: (BOOL)flag
{
  NSFileWrapper *wrapper;
  NSRange range = NSMakeRange (0, [_textStorage length]);
  
  wrapper = [_textStorage RTFDFileWrapperFromRange: range  
			  documentAttributes: nil];
  return [wrapper writeToFile: path  atomically: flag  updateFilenames: YES];
}


/*
 * [NSResponder] Handle enabling/disabling of services menu items.
 */
- (id) validRequestorForSendType: (NSString *)sendType
		      returnType: (NSString *)returnType
{
  BOOL sendOK = NO;
  BOOL returnOK = NO;

  if (!_layoutManager)
    return [super validRequestorForSendType: sendType  returnType: returnType];

  if (sendType == nil)
    {
      sendOK = YES;
    }
  else if (_layoutManager->_selected_range.length && [sendType isEqual: NSStringPboardType])
    {
      sendOK = YES;
    }

  if (returnType == nil)
    {
      returnOK = YES;
    }
  else if (_tf.is_editable && [returnType isEqual: NSStringPboardType])
    {
      returnOK = YES;
    }

  if (sendOK && returnOK)
    {
      return self;
    }

  return [super validRequestorForSendType: sendType  returnType: returnType];
}


- (void) setTypingAttributes: (NSDictionary *)attrs
{
  NSDictionary *old_attrs;
  NSString *names[] = {NSParagraphStyleAttributeName,
		       NSFontAttributeName,
		       NSForegroundColorAttributeName};
  int i;

  if (attrs == nil)
    {
      attrs = [isa defaultTypingAttributes];
    }

  old_attrs = _layoutManager->_typingAttributes;
  _layoutManager->_typingAttributes = [[NSMutableDictionary alloc]
			    initWithDictionary: attrs];

  // make sure to keep the main attributes set.
  for (i = 0; i < 3; i++)
    {
      NSString *name = names[i];

      if ([attrs objectForKey: name] == nil)
        {
	  [_layoutManager->_typingAttributes setObject: [old_attrs objectForKey: name]
			 forKey: name];
	}
    }
  RELEASE(old_attrs);

  [self updateFontPanel];
  [self updateRuler];
}

- (NSDictionary *) typingAttributes
{
  return [NSDictionary dictionaryWithDictionary: _layoutManager->_typingAttributes];
}


- (void) clickedOnLink: (id)link
	       atIndex: (unsigned int)charIndex
{
  if (_delegate != nil)
    {
      SEL selector = @selector(textView:clickedOnLink:atIndex:);

      if ([_delegate respondsToSelector: selector])
	{
	  [_delegate textView: self  clickedOnLink: link  atIndex: charIndex];
	}
    }
}

- (void) updateFontPanel
{
  /* Update fontPanel only if told so */
  if (_tf.uses_font_panel)
    {
      NSRange longestRange;
      NSFontManager *fm = [NSFontManager sharedFontManager];
      NSFont *currentFont;

      if (_layoutManager->_selected_range.length > 0) /* Multiple chars selection */
	{
	  currentFont = [_textStorage attribute: NSFontAttributeName
				      atIndex: _layoutManager->_selected_range.location
				      longestEffectiveRange: &longestRange
				      inRange: _layoutManager->_selected_range];
	  [fm setSelectedFont: currentFont
	      isMultiple: !NSEqualRanges (longestRange, _layoutManager->_selected_range)];
	}
      else /* Just Insertion Point. */ 
	{
	  currentFont = [_layoutManager->_typingAttributes objectForKey: NSFontAttributeName];
	  [fm setSelectedFont: currentFont  isMultiple: NO];
	}
    }
}


/**** Smart insert/delete ****/

- (NSRange) smartDeleteRangeForProposedRange: (NSRange)proposedCharRange
{
  /* TODO */
  return proposedCharRange;
}

- (NSString *)smartInsertAfterStringForString: (NSString *)aString
			      replacingRange: (NSRange)charRange
{
  /* TODO */
  return nil;
}

- (NSString *)smartInsertBeforeStringForString: (NSString *)aString
			       replacingRange: (NSRange)charRange
{
  /* TODO */
  return nil;
}

- (void) smartInsertForString: (NSString *)aString
	      replacingRange: (NSRange)charRange
		beforeString: (NSString **)beforeString
		 afterString: (NSString **)afterString
{
/*
Determines whether whitespace needs to be added around aString to
preserve proper spacing and punctuation when it's inserted into the
receiver's text over charRange. Returns by reference in beforeString and
afterString any whitespace that should be added, unless either or both is
nil. Both are returned as nil if aString is nil or if smart insertion and
deletion is disabled.

As part of its implementation, this method calls
-smartInsertAfterStringForString: replacingRange: and
-smartInsertBeforeStringForString: replacingRange: .To change this method's
behavior, override those two methods instead of this one.

NSTextView uses this method as necessary. You can also use it in
implementing your own methods that insert text. To do so, invoke this
method with the proper arguments, then insert beforeString, aString, and
afterString in order over charRange.
*/
  if (beforeString)
    *beforeString = [self smartInsertBeforeStringForString: aString 
			  replacingRange: charRange];

  if (afterString)
    *afterString = [self smartInsertAfterStringForString: aString 
			 replacingRange: charRange];
}


/**** Selection management ****/

- (NSRange) selectedRange
{
  return _layoutManager->_selected_range;
}

- (void) setSelectedRange: (NSRange)charRange
{
  [self setSelectedRange: charRange  affinity: [self selectionAffinity]
	stillSelecting: NO];
}

/**
 * Return a range of text which encompasses proposedCharRange but is
 * extended (if necessary) to match the type of selection specified by gr.
 */
- (NSRange) selectionRangeForProposedRange: (NSRange)proposedCharRange
			       granularity: (NSSelectionGranularity)gr
{
  unsigned index;
  NSRange aRange;
  NSRange newRange;
  NSString *string = [self string];
  unsigned length = [string length];

  if (proposedCharRange.location >= length)
    {
      proposedCharRange.location = length;
      proposedCharRange.length = 0;
      return proposedCharRange;
    }

  if (NSMaxRange (proposedCharRange) > length)
    {
      proposedCharRange.length = length - proposedCharRange.location;
    }

  if (length == 0)
    {
      return proposedCharRange;
    }

  switch (gr)
    {
      case NSSelectByWord:
	index = proposedCharRange.location;
	if (index >= length)
	  {
	    index = length - 1;
	  }
	newRange = [_textStorage doubleClickAtIndex: index];
	if (proposedCharRange.length > 1)
	  {
	    index = NSMaxRange(proposedCharRange) - 1;
	    if (index >= length)
	      {
		index = length - 1;
	      }
	    aRange = [_textStorage doubleClickAtIndex: index];
	    newRange = NSUnionRange(newRange, aRange);
	  }
	return newRange;

      case NSSelectByParagraph:
	return [string lineRangeForRange: proposedCharRange];

      case NSSelectByCharacter:
      default:
	if (proposedCharRange.length == 0)
	  return proposedCharRange;

	/* Expand the beginning character */
	index = proposedCharRange.location;
	newRange = [string rangeOfComposedCharacterSequenceAtIndex: index];
	/* If the proposedCharRange is empty we only ajust the beginning */
	if (proposedCharRange.length == 0)
	  {
	    return newRange;
	  }
	/* Expand the finishing character */
	index = NSMaxRange (proposedCharRange) - 1;
	aRange = [string rangeOfComposedCharacterSequenceAtIndex: index];
	newRange.length = NSMaxRange(aRange) - newRange.location;
	return newRange;
    }
}


- (void) setSelectedRange: (NSRange)charRange
		 affinity: (NSSelectionAffinity)affinity
	   stillSelecting: (BOOL)stillSelectingFlag
{
  /*
  Note that this method might be called from the layout manager to update
  the selection after the text storage has been changed. If text was deleted,
  the old selected range might extend outside the current string. Also note
  that this happens during the processing of the changes in the text storage.
  Thus, it isn't safe to modify the text storage.
  */

  /* The `official' (the last one the delegate approved of) selected
     range before this one. */
  NSRange oldRange;
  /* If the user was interactively changing the selection, the last
     displayed selection could have been a temporary selection,
     different from the last official one: */
  NSRange oldDisplayedRange;
  unsigned int length = [_textStorage length];

  oldDisplayedRange = _layoutManager->_selected_range;

  if (NSMaxRange(charRange) > length)
    {
      if (charRange.location > length)
	{
	  charRange = NSMakeRange(length, 0);
	}
      else
	{
	  charRange.length = length - charRange.location;
	}
    }

  if (stillSelectingFlag == YES)
    {
      /* Store the original range before the interactive selection
	 process begin.  That's because we will need to ask the delegate
	 if it's all right for him to do the change, and then notify 
	 him we did.  In both cases, we need to post the original selection 
	 together with the new one. */
      if (_layoutManager->_original_selected_range.location == NSNotFound)
	{
	  oldRange
	    = _layoutManager->_original_selected_range
	    = _layoutManager->_selected_range;
	}
    }
  else 
    {
      /* Retrieve the original range */
      if (_layoutManager->_original_selected_range.location != NSNotFound)
	{
	  oldRange = _layoutManager->_original_selected_range;
	  _layoutManager->_original_selected_range.location = NSNotFound;
	}
      else
	{
	  oldRange = _layoutManager->_selected_range;
	}
      
      /* Ask delegate to modify the range */
      if (_tf.delegate_responds_to_will_change_sel)
	{
	  charRange = [_delegate textView: _notifObject
			     willChangeSelectionFromCharacterRange: oldRange
			     toCharacterRange: charRange];
	}
    }

  /* Set the new selected range */
  _layoutManager->_selected_range = charRange;

  /* Clear the remembered position and direction for insertion point
  movement.

  Note that we must _not_ clear the index. Many movement actions will
  reset the direction to a valid value, and they assume that the index
  remains unchanged here. */
  _currentInsertionPointMovementDirection = 0;

  /* TODO: when and if to restart timer <and where to stop it before> */
  [self updateInsertionPointStateAndRestartTimer: !stillSelectingFlag];

  if (stillSelectingFlag == NO)
    {
      [self updateFontPanel];
      
      /* Insertion Point */
      if (charRange.length)
	{
	  /*
	  TODO: this is a big bottle-neck since it involves talking to
	  the pasteboard server. should do this "later"
	  */
	  // Store the selected text in the selection pasteboard
	  [self copySelection];

	  /* TODO: insertion point */
	}
      else  /* no selection, only insertion point */
	{
	  if (_tf.is_rich_text && length)
	    {
	      NSDictionary *dict;
	    
	      if (charRange.location > 0)
		{
		  /* If the insertion point is after a bold word, for
		     example, we need to use bold for further
		     insertions - this is why we take the attributes
		     from range.location - 1. */
		  dict = [_textStorage attributesAtIndex:
		    (charRange.location - 1) effectiveRange: NULL];
		}
	      else
		{
		  /* Unless we are at the beginning of text - we use the 
		     first valid attributes then */
		  dict = [_textStorage attributesAtIndex: charRange.location
				       effectiveRange: NULL];
		}
	      [self setTypingAttributes: dict];
	    }
	}
    }

  if (_window != nil)
    {
      NSRange overlap;

      /*
      If this call is caused by text being deleted, oldDisplayedRange might
      extend outside the current text. We clamp it to the current length here
      for safety. Redisplay might be a bit off in this case, but the text
      change will cause any missing bits to be redisplayed anyway.
      */
      if (oldDisplayedRange.location > length)
	oldDisplayedRange.location = length;
      if (NSMaxRange(oldDisplayedRange) > length)
	oldDisplayedRange.length = length - oldDisplayedRange.location;

      /* Try to optimize for overlapping ranges */
      overlap = NSIntersectionRange (oldRange, charRange);
      if (overlap.length)
	{
	  if (charRange.location != oldDisplayedRange.location)
	    {
	      NSRange r;
	      r = MakeRangeFromAbs (MIN (charRange.location, 
					 oldDisplayedRange.location),
				    MAX (charRange.location, 
					 oldDisplayedRange.location));
	      [self setNeedsDisplayInRect: [self rectForCharacterRange: r]
		    avoidAdditionalLayout: YES];
	    }
	  if (NSMaxRange (charRange) != NSMaxRange (oldDisplayedRange))
	    {
	      NSRange r;

	      r = MakeRangeFromAbs (MIN (NSMaxRange (charRange), 
					 NSMaxRange (oldDisplayedRange)),
				    MAX (NSMaxRange (charRange),
					 NSMaxRange (oldDisplayedRange)));
	      [self setNeedsDisplayInRect: [self rectForCharacterRange: r]
		    avoidAdditionalLayout: YES];
	    }
	}
      else
	{
	  [self setNeedsDisplayInRect: [self rectForCharacterRange: charRange]
		avoidAdditionalLayout: YES];
	  [self setNeedsDisplayInRect: [self rectForCharacterRange: 
					       oldDisplayedRange]
		avoidAdditionalLayout: YES];
	}
    }
  
  [self setSelectionGranularity: NSSelectByCharacter];
  _layoutManager->_selectionAffinity = affinity;
  
  /* TODO: Remove the marking from marked text if the new selection is
     greater than the marked region. */
  
  if (stillSelectingFlag == NO)
    {
      NSDictionary *userInfo;

      userInfo = [NSDictionary dictionaryWithObjectsAndKeys:
				 [NSValue valueWithBytes: &oldRange 
					  objCType: @encode(NSRange)],
			       NSOldSelectedCharacterRange, nil];
       
      [notificationCenter postNotificationName: NSTextViewDidChangeSelectionNotification
	  object: _notifObject  userInfo: userInfo];
    }
}

- (NSSelectionAffinity) selectionAffinity 
{ 
  return _layoutManager->_selectionAffinity;
}

- (void) setSelectionGranularity: (NSSelectionGranularity)granularity
{
  _layoutManager->_selectionGranularity = granularity;
}

- (NSSelectionGranularity) selectionGranularity
{
  return _layoutManager->_selectionGranularity;
}



/**** Drawing ****/

/*
TODO:
Figure out how the additional layout stuff is supposed to work.
*/

- (void) setNeedsDisplayInRect: (NSRect)rect
	 avoidAdditionalLayout: (BOOL)flag
{
  /* TODO: This is here until the layout manager is working */
  /* This is very important */
  [super setNeedsDisplayInRect: rect];
}

/* We override NSView's setNeedsDisplayInRect: */

- (void) setNeedsDisplayInRect: (NSRect)aRect
{
  [self setNeedsDisplayInRect: aRect  avoidAdditionalLayout: NO];
}

- (BOOL) shouldDrawInsertionPoint
{
  if (!_layoutManager)
    return NO;
  if (_layoutManager->_selected_range.length != 0)
    return NO;
  if (_tf.is_editable == NO)
    return NO;
  if (_tf.isDragTarget == YES)
    return YES;
  if ([_window isKeyWindow] == YES && [_window firstResponder] == self)
    return YES;
  return NO;
}

/*
 * It only makes real sense to call this method with `flag == YES'.
 * If you want to delete the insertion point, what you want is rather
 * to redraw what was under the insertion point - which can't be done
 * here - you need to set the rect as needing redisplay (without
 * additional layout) instead.  NB: You need to flush the window after
 * calling this method if you want the insertion point to appear on
 * the screen immediately.  This could only be needed to implement
 * blinking insertion point - but even there, it could probably be
 * done without. */
- (void) drawInsertionPointInRect: (NSRect)rect
			    color: (NSColor *)color
			 turnedOn: (BOOL)flag
{
  if (_window == nil)
    {
      return;
    }

  if (flag)
    {
      if (color == nil)
	{
	  color = _insertionPointColor;
	}
      
      [color set];
      NSRectFill (rect);
    }
  else
    {
      [_backgroundColor set];
      NSRectFill (rect);
    }
}

- (void) drawRect: (NSRect)rect
{
  /* TODO: Only do relayout if needed */
  NSRange drawnRange;
  NSRect containerRect = rect;

  containerRect.origin.x -= _textContainerOrigin.x;
  containerRect.origin.y -= _textContainerOrigin.y;
  drawnRange = [_layoutManager glyphRangeForBoundingRect: containerRect 
			       inTextContainer: _textContainer];

  if (_tf.draws_background)
    {
      /* First paint the background with the color.  This is necessary
       * to remove markings of old glyphs.  These would not be removed
       * by the following call to the layout manager because that only
       * paints the background of new glyphs.  Depending on the
       * situation, there might be no new glyphs where the old glyphs
       * were!  */
      [_backgroundColor set];
      NSRectFill([self bounds]);
    }

  /* Then draw the special background of the new glyphs.  */
  [_layoutManager drawBackgroundForGlyphRange: drawnRange
				      atPoint: _textContainerOrigin];

/*printf("%@ drawRect: (%g %g)+(%g %g)\n",
	self,rect.origin.x,rect.origin.y,
	rect.size.width,rect.size.height);*/
  [_layoutManager drawGlyphsForGlyphRange: drawnRange 
		  atPoint: _textContainerOrigin];
/*printf("insertion point %@\n",
	NSStringFromRect(_insertionPointRect));*/

  if ([self shouldDrawInsertionPoint] &&
      [NSGraphicsContext currentContextDrawingToScreen])
    {
      if (NSIntersectsRect(rect, _insertionPointRect))
	{
	  [self drawInsertionPointInRect: _insertionPointRect
	    color: _insertionPointColor
	    turnedOn: YES];
	}
#if 0 /* TODO: insertion point */
      unsigned location = _layoutManager->_selected_range.location;
      
      if (NSLocationInRange (location, drawnRange) 
	  || location == NSMaxRange (drawnRange))
	{
	  if (_drawInsertionPointNow && viewIsPrinting != self)
	    {
	      [self drawInsertionPointInRect: _insertionPointRect  
		    color: _insertionPointColor
		    turnedOn: YES];
	    }
	}
#endif
    }
}


- (void) updateInsertionPointStateAndRestartTimer: (BOOL)restartFlag
{
  /* TODO: this is a basic stopgap implementation; should work fine, but no
  blinking. need to do a proper one once I know how */

  NSRect new;

  if (!_layoutManager)
    {
      _insertionPointRect = NSZeroRect;
      return;
    }

  if (_layoutManager->_selected_range.length > 0 ||
      _layoutManager->_selected_range.location == NSNotFound ||
      !restartFlag)
    {
      new = NSZeroRect;
    }
  else
    {
      new = [_layoutManager
	      insertionPointRectForCharacterIndex: _layoutManager->_selected_range.location
	      inTextContainer: _textContainer];

      new.origin.x += _textContainerOrigin.x;
      new.origin.y += _textContainerOrigin.y;

      /* If the insertion would extend outside the view (e.g. because it's
      just to the right of a character on the far right edge of the view,
      a common case for right-aligned text), we force it back in. */
      if (NSMaxX(new) > NSMaxX(_bounds))
	{
	  new.origin.x = NSMaxX(_bounds) - new.size.width;
	}
    }

  if (!NSEqualRects(new, _insertionPointRect))
    {
      [self setNeedsDisplayInRect: _insertionPointRect];
      _insertionPointRect = new;
      [self setNeedsDisplayInRect: _insertionPointRect];
    }

#if 0   /* TODO: old code for insertion point blinking. might be useful */
  if (restartFlag)
    {
      /* Start blinking timer if not yet started */
      if (_insertionPointTimer == nil  &&  [self shouldDrawInsertionPoint])
	{
	  _insertionPointTimer = [NSTimer scheduledTimerWithTimeInterval: 0.5
					  target: self
					  selector: @selector(_blink:)
					  userInfo: nil
					  repeats: YES];
	  RETAIN (_insertionPointTimer);
	}
      else if (_insertionPointTimer != nil)
	{
	  [_insertionPointTimer invalidate];
	  DESTROY (_insertionPointTimer);
	  [self setNeedsDisplayInRect: oldInsertionPointRect
		avoidAdditionalLayout: YES];
	  _insertionPointTimer = [NSTimer scheduledTimerWithTimeInterval: 0.5
					  target: self
					  selector: @selector(_blink:)
					  userInfo: nil
					  repeats: YES];
	  RETAIN (_insertionPointTimer);
	}
      /* Ok - blinking has just been turned on.  Make sure we start
       * the on/off/on/off blinking from the 'on', because in that way
       * the user can see where the insertion point is as soon as
       * possible.  
       */
      _drawInsertionPointNow = YES;
      [self setNeedsDisplayInRect: _insertionPointRect
	    avoidAdditionalLayout: YES];
    }
  else
    {
      if (_insertionPointTimer != nil)
	{
	  [self setNeedsDisplayInRect: oldInsertionPointRect
	    avoidAdditionalLayout: YES];
	  [_insertionPointTimer invalidate];
	  DESTROY (_insertionPointTimer);

	}
    }
#endif

  [self _updateInputMethodWithInsertionPoint: _insertionPointRect.origin];
}




/**** Ruler handling ****/

/**
 * Mote movement of marker
 */
- (void) rulerView: (NSRulerView *)ruler
     didMoveMarker: (NSRulerMarker *)marker
{
  NSTextTab *old_tab = (NSTextTab*)[marker representedObject];
  NSTextTab *new_tab = [[NSTextTab alloc] initWithType: [old_tab tabStopType]
					  location: [marker markerLocation]];
  NSRange range = [self rangeForUserParagraphAttributeChange];
  unsigned	loc = range.location;
  NSParagraphStyle *style;
  NSMutableParagraphStyle *mstyle;

  [_textStorage beginEditing];
  while (loc < NSMaxRange(range))
    {
      id	value;
      BOOL	copiedStyle = NO;
      NSRange	effRange;
      NSRange	newRange;

      value = [_textStorage attribute: NSParagraphStyleAttributeName
		      atIndex: loc
	       effectiveRange: &effRange];
      newRange = NSIntersectionRange (effRange, range);

      if (value == nil)
	{
	  value = [NSMutableParagraphStyle defaultParagraphStyle];
	}
      else
	{
	  value = [value mutableCopy];
	  copiedStyle = YES;
	}

      [value removeTabStop: old_tab];
      [value addTabStop: new_tab];

      [_textStorage addAttribute: NSParagraphStyleAttributeName
		   value: value
		   range: newRange];
      if (copiedStyle == YES)
	{
	  RELEASE(value);
	}
      loc = NSMaxRange (effRange);
    }
  [_textStorage endEditing];
  [self didChangeText];

  // Set the typing attributes
  style = [_layoutManager->_typingAttributes objectForKey: NSParagraphStyleAttributeName];
  if (style == nil)
    style = [NSParagraphStyle defaultParagraphStyle];

  mstyle = [style mutableCopy];

  [mstyle removeTabStop: old_tab];
  [mstyle addTabStop: new_tab];
  // TODO: Should use setTypingAttributes
  [_layoutManager->_typingAttributes setObject: mstyle forKey: NSParagraphStyleAttributeName];
  RELEASE(mstyle);

  [marker setRepresentedObject: new_tab];
  RELEASE(new_tab);
}

/**
 * Handle removal of marker.
 */
- (void) rulerView: (NSRulerView *)ruler
   didRemoveMarker: (NSRulerMarker *)marker
{
  NSTextTab *tab = (NSTextTab *)[marker representedObject];
  NSRange range = [self rangeForUserParagraphAttributeChange];
  unsigned	loc = range.location;
  NSParagraphStyle *style;
  NSMutableParagraphStyle *mstyle;

  [_textStorage beginEditing];
  while (loc < NSMaxRange(range))
    {
      id	value;
      BOOL	copiedStyle = NO;
      NSRange	effRange;
      NSRange	newRange;

      value = [_textStorage attribute: NSParagraphStyleAttributeName
		      atIndex: loc
	       effectiveRange: &effRange];
      newRange = NSIntersectionRange (effRange, range);

      if (value == nil)
	{
	  value = [NSMutableParagraphStyle defaultParagraphStyle];
	}
      else
	{
	  value = [value mutableCopy];
	  copiedStyle = YES;
	}

      [value removeTabStop: tab];

      [_textStorage addAttribute: NSParagraphStyleAttributeName
		   value: value
		   range: newRange];
      if (copiedStyle == YES)
	{
	  RELEASE(value);
	}
      loc = NSMaxRange (effRange);
    }
  [_textStorage endEditing];
  [self didChangeText];

  // Set the typing attributes
  style = [_layoutManager->_typingAttributes objectForKey: NSParagraphStyleAttributeName];
  if (style == nil)
    style = [NSParagraphStyle defaultParagraphStyle];

  mstyle = [style mutableCopy];

  [mstyle removeTabStop: tab];
  // TODO: Should use setTypingAttributes
  [_layoutManager->_typingAttributes setObject: mstyle forKey: NSParagraphStyleAttributeName];
  RELEASE(mstyle);
}

- (void) rulerView: (NSRulerView *)ruler 
      didAddMarker: (NSRulerMarker *)marker
{
  NSTextTab *old_tab = (NSTextTab *)[marker representedObject];
  NSTextTab *new_tab = [[NSTextTab alloc] initWithType: [old_tab tabStopType]
					  location: [marker markerLocation]];
  NSRange range = [self rangeForUserParagraphAttributeChange];
  unsigned	loc = range.location;
  NSParagraphStyle *style;
  NSMutableParagraphStyle *mstyle;

  [_textStorage beginEditing];
  while (loc < NSMaxRange(range))
    {
      id	value;
      BOOL	copiedStyle = NO;
      NSRange	effRange;
      NSRange	newRange;

      value = [_textStorage attribute: NSParagraphStyleAttributeName
		      atIndex: loc
	       effectiveRange: &effRange];
      newRange = NSIntersectionRange (effRange, range);

      if (value == nil)
	{
	  value = [NSMutableParagraphStyle defaultParagraphStyle];
	}
      else
	{
	  value = [value mutableCopy];
	  copiedStyle = YES;
	}

      [value addTabStop: new_tab];

      [_textStorage addAttribute: NSParagraphStyleAttributeName
		   value: value
		   range: newRange];
      if (copiedStyle == YES)
	{
	  RELEASE(value);
	}
      loc = NSMaxRange (effRange);
    }
  [_textStorage endEditing];
  [self didChangeText];

  // Set the typing attributes
  style = [_layoutManager->_typingAttributes objectForKey: NSParagraphStyleAttributeName];
  if (style == nil)
    style = [NSParagraphStyle defaultParagraphStyle];

  mstyle = [style mutableCopy];

  [mstyle addTabStop: new_tab];
  // TODO: Should use setTypingAttributes
  [_layoutManager->_typingAttributes setObject: mstyle forKey: NSParagraphStyleAttributeName];
  RELEASE(mstyle);

  [marker setRepresentedObject: new_tab];
  RELEASE(new_tab);
}

/**
 * Set new marker position from mouse down location.
 */
- (void) rulerView: (NSRulerView *)ruler
   handleMouseDown: (NSEvent *)event
{
  NSPoint point = [ruler convertPoint: [event locationInWindow] 
			     fromView: nil];
  float location = point.x;
  NSRulerMarker *marker = [[NSRulerMarker alloc] 
			      initWithRulerView: ruler
			      markerLocation: location
			      image: [NSImage imageNamed: @"common_LeftTabStop"]
			      imageOrigin: NSMakePoint(0, 0)];
  NSTextTab *tab = [[NSTextTab alloc] initWithType: NSLeftTabStopType
					  location: location];

  [marker setRepresentedObject: tab];
  [ruler trackMarker: marker withMouseEvent: event];
  RELEASE(marker);
  RELEASE(tab);
}

/**
 * Return YES if the marker should be added, NO otherwise.
 */
- (BOOL) rulerView: (NSRulerView *)ruler
   shouldAddMarker: (NSRulerMarker *)marker
{
  return [self shouldChangeTextInRange:
    [self rangeForUserParagraphAttributeChange] replacementString: nil];
}


/**
 * Return YES if the marker should be moved, NO otherwise.
 */
- (BOOL) rulerView: (NSRulerView *)ruler
  shouldMoveMarker: (NSRulerMarker *)marker
{
  return [self shouldChangeTextInRange:
    [self rangeForUserParagraphAttributeChange] replacementString: nil];
}

/**
 * Return YES if the marker should be removed, NO otherwise.
 */
- (BOOL) rulerView: (NSRulerView *)ruler
shouldRemoveMarker: (NSRulerMarker *)marker
{
  return [(NSObject *)[marker representedObject] isKindOfClass: [NSTextTab class]];
}

/**
 * Return a position for adding by constraining the specified location.
 */
- (float) rulerView: (NSRulerView *)ruler
      willAddMarker: (NSRulerMarker *)marker
	 atLocation: (float)location
{
  NSSize size = [_textContainer containerSize];

  if (location < 0.0)
    return 0.0;

  if (location > size.width)
    return size.width;

  return location;
}

/**
 * Return a new position by constraining the specified location.
 */
- (float) rulerView: (NSRulerView *)ruler
     willMoveMarker: (NSRulerMarker *)marker
	 toLocation: (float)location
{
  NSSize size = [_textContainer containerSize];

  if (location < 0.0)
    return 0.0;

  if (location > size.width)
    return size.width;

  return location;
}

- (void) updateRuler
{
  NSScrollView *sv;
  NSRulerView *rv;

  /* Update ruler view only if told so */
  if (_tf.uses_ruler && _tf.is_ruler_visible &&
      (sv = [self enclosingScrollView]) != nil && 
      (rv = [sv horizontalRulerView]) != nil)
    {
      NSParagraphStyle *paraStyle;
      NSArray *makers;

      if (_layoutManager->_selected_range.length > 0) /* Multiple chars selection */
	{
	  paraStyle = [_textStorage attribute: NSParagraphStyleAttributeName
			     atIndex: _layoutManager->_selected_range.location
			     effectiveRange: NULL];
	}
      else
        {
	  paraStyle = [_layoutManager->_typingAttributes objectForKey: 
					     NSParagraphStyleAttributeName];
	}

      makers = [_layoutManager rulerMarkersForTextView: self
			       paragraphStyle: paraStyle
			       ruler: rv];
      // TODO This is not the correct place to call this.
      [rv setClientView: self];
      [rv setMarkers: makers];
    }
}


/**** Spell checking ****/

- (void) checkSpelling: (id)sender
{
  NSSpellChecker *sp = [NSSpellChecker sharedSpellChecker];
  NSString *misspelledWord = nil;
  NSRange errorRange;
  int count = 0;

  if (sp == nil)
    {
      return;
    }
  errorRange = [sp checkSpellingOfString: [self string]
		              startingAt: NSMaxRange (_layoutManager->_selected_range)
		                language: [sp language]
		                    wrap: YES
		  inSpellDocumentWithTag: [self spellCheckerDocumentTag]
		               wordCount: &count];
  
  if (errorRange.length)
    {
      [self setSelectedRange: errorRange];
      [self scrollRangeToVisible: errorRange];

      misspelledWord = [[self string] substringFromRange: errorRange];
      [sp updateSpellingPanelWithMisspelledWord: misspelledWord];
    }
  else
    {
      [sp updateSpellingPanelWithMisspelledWord: @""];
    }
}

- (void) changeSpelling: (id)sender
{
  [self insertText: [[(NSControl *)sender selectedCell] stringValue]];
}

- (void) ignoreSpelling: (id)sender
{
  NSSpellChecker *sp = [NSSpellChecker sharedSpellChecker];

  [sp ignoreWord: [[(NSControl *)sender selectedCell] stringValue]
      inSpellDocumentWithTag: [self spellCheckerDocumentTag]];
}


- (int) spellCheckerDocumentTag
{
  if (!_spellCheckerDocumentTag)
    _spellCheckerDocumentTag = [NSSpellChecker uniqueSpellDocumentTag];

  return _spellCheckerDocumentTag;
}


/**** Pasteboard handling ****/

- (NSString *) preferredPasteboardTypeFromArray: (NSArray *)availableTypes
		    restrictedToTypesFromArray: (NSArray *)allowedTypes
{
  NSEnumerator *enumerator;
  NSString *type;

  if (availableTypes == nil)
    return nil;

  if (allowedTypes == nil)
    return [availableTypes objectAtIndex: 0];
    
  enumerator = [allowedTypes objectEnumerator];
  while ((type = [enumerator nextObject]) != nil)
    {
      if ([availableTypes containsObject: type])
        {
	  return type;
        }
    }
  return nil;  
}

- (BOOL) readSelectionFromPasteboard: (NSPasteboard *)pboard
{
/*
  Reads the text view's preferred type of data from the pasteboard
  specified by the pboard parameter. This method invokes the
  preferredPasteboardTypeFromArray: restrictedToTypesFromArray: method
  to determine the text view's preferred type of data and then reads
  the data using the readSelectionFromPasteboard: type:
  method. Returns YES if the data was successfully read.  */
  NSString *type;

  type = [self preferredPasteboardTypeFromArray: [pboard types]
	       restrictedToTypesFromArray: [self readablePasteboardTypes]];
  
  if (type == nil)
    return NO;
  
  return [self readSelectionFromPasteboard: pboard  type: type];
}

/*
This method is for user changes; see NSTextView_actions.m.

(Note that this makes it impossible to paste programmatically, but it's
necessary to get the -shouldChangeTextInRange:replacementString: calls
right.)
*/
- (BOOL) readSelectionFromPasteboard: (NSPasteboard *)pboard
				type: (NSString *)type
{
/*
  Reads data of the given type from pboard. The new data is placed at
  the current insertion point, replacing the current selection if one
  exists.  Returns YES if the data was successfully read.

  You should override this method to read pasteboard types other than
  the default types. Use the rangeForUserTextChange method to obtain
  the range of characters (if any) to be replaced by the new data.  */
  NSRange changeRange = [self rangeForUserTextChange];

  if ([type isEqualToString: NSStringPboardType])
    {
      [self insertText: [pboard stringForType: NSStringPboardType]];
      return YES;
    } 

  /* TODO: When inserting attributed strings, I call
  -shouldChangeTextInRange:replacementString: with the string from the
  attributed string. Need to decide if this is correct (probably; not much
  else to do), or if I need to do something else. */

  if (_tf.is_rich_text)
    {
      if ([type isEqualToString: NSRTFPboardType])
	{
	  if (changeRange.location != NSNotFound)
	    {
	      NSAttributedString *as;
	      NSData *d = [pboard dataForType: NSRTFPboardType];

	      as = [[NSAttributedString alloc] initWithRTF: d
		     documentAttributes: NULL];

	      if ([self shouldChangeTextInRange: changeRange
		    replacementString: [as string]])
		{
		  [self replaceCharactersInRange: changeRange
		    withAttributedString: as];
		  [self didChangeText];
		}

	      DESTROY(as);
	    }
	  return YES;
	}
    }

  if (_tf.imports_graphics)
    {
      if ([type isEqualToString: NSRTFDPboardType])
	{
	  if (changeRange.location != NSNotFound)
	    {
	      NSAttributedString *as;
	      NSData *d = [pboard dataForType: NSRTFDPboardType];

	      as = [[NSAttributedString alloc] initWithRTFD: d
		     documentAttributes: NULL];

	      if ([self shouldChangeTextInRange: changeRange
		    replacementString: [as string]])
		{
		  [self replaceCharactersInRange: changeRange
		    withAttributedString: as];
		  [self didChangeText];
		}

	      DESTROY(as);
	    }
	  return YES;
	}
      if ([type isEqualToString: NSTIFFPboardType])
	{
	  if (changeRange.location != NSNotFound)
	    {
	      NSData *pboardData = [pboard dataForType: NSTIFFPboardType];
	      NSFileWrapper *wrapper = [[NSFileWrapper alloc] initRegularFileWithContents: pboardData];
	      NSImage *image = [[NSImage alloc] initWithData: pboardData];
	      NSTextAttachment *attachment = [[NSTextAttachment alloc] initWithFileWrapper: wrapper];
	      NSAttributedString *as = [NSAttributedString attributedStringWithAttachment: attachment];

	      [wrapper setIcon: image];
	      /* We changed the wrapper's icon. Reset the attachment to force
	      an update of the attachment's cell's image. */
	      [attachment setFileWrapper: wrapper];
	      if ([self shouldChangeTextInRange: changeRange
			      replacementString: [as string]])
		{
		  [self replaceCharactersInRange: changeRange
			    withAttributedString: as];
		  [self didChangeText];
		}
	      RELEASE(attachment);
	      RELEASE(image);
	      RELEASE(wrapper);
	    }
	  return YES;
        }
      if ([type isEqualToString: NSFileContentsPboardType])
	{
	  NSTextAttachment *attachment = [[NSTextAttachment alloc] 
					      initWithFileWrapper: 
						  [pboard readFileWrapper]];
	  NSAttributedString *as =
	    [NSAttributedString attributedStringWithAttachment: attachment];

	  if (changeRange.location != NSNotFound &&
	      [self shouldChangeTextInRange: changeRange
		replacementString: [as string]])
	    {
	      [self replaceCharactersInRange: changeRange
		withAttributedString: as];
	      [self didChangeText];
	    }
	  RELEASE(attachment);
	  return YES;
	}
    }

  // color accepting
  if ([type isEqualToString: NSColorPboardType])
    {
      /* This is an attribute change, so we use a different range. */
      NSRange aRange = [self rangeForUserCharacterAttributeChange];
      NSColor *color = [NSColor colorFromPasteboard: pboard];
      NSMutableDictionary	*d = [[self typingAttributes] mutableCopy];


      if (aRange.location != NSNotFound &&
	  [self shouldChangeTextInRange: aRange
	    replacementString: nil])
	{
	  [self setTextColor: color range: aRange];
	  [d setObject: color forKey: NSForegroundColorAttributeName];
	  [self setTypingAttributes: d];
	  RELEASE(d);
	  [self didChangeText];
	}

      return YES;
    }

  // font pasting
  if ([type isEqualToString: NSFontPboardType])
    {
      NSData *data = [pboard dataForType: NSFontPboardType];
      NSDictionary *dict = [NSUnarchiver unarchiveObjectWithData: data];

      if (dict != nil)
	{
	  /* This is an attribute change, so we use a different range. */
	  NSRange aRange = [self rangeForUserCharacterAttributeChange];
	  NSMutableDictionary	*d;

	  if (aRange.location != NSNotFound &&
	      [self shouldChangeTextInRange: aRange
		replacementString: nil])
	    {
	      [_textStorage addAttributes: dict range: aRange];

	      d = [[self typingAttributes] mutableCopy];
	      [d addEntriesFromDictionary: dict];
	      [self setTypingAttributes: d];
	      RELEASE(d);
	      [self didChangeText];
	    }
	  return YES;
	}
      return NO;
    }

  // ruler pasting
  if ([type isEqualToString: NSRulerPboardType])
    {
      NSData *data = [pboard dataForType: NSRulerPboardType];
      NSDictionary *dict = [NSUnarchiver unarchiveObjectWithData: data];

      if (dict != nil)
	{
	  /* This is an attribute change, so we use a different range. */
	  NSRange aRange = [self rangeForUserParagraphAttributeChange];
	  NSMutableDictionary	*d;

	  if (aRange.location != NSNotFound &&
	      [self shouldChangeTextInRange: aRange
		replacementString: nil])
	    {
	      [_textStorage addAttributes: dict range: aRange];
	      d = [[self typingAttributes] mutableCopy];
	      [d addEntriesFromDictionary: dict];
	      [self setTypingAttributes: d];
	      RELEASE(d);
	      [self didChangeText];
	    }
	  return YES;
	}
      return NO;
    }
 
  return NO;
}

- (NSArray *) readablePasteboardTypes
{
  // get default types, what are they?
  NSMutableArray *ret = [NSMutableArray arrayWithObjects: NSRulerPboardType,
    NSColorPboardType, NSFontPboardType, nil];

  if (_tf.imports_graphics)
    {
      [ret addObject: NSRTFDPboardType];
      [ret addObject: NSTIFFPboardType];
      [ret addObject: NSFileContentsPboardType];
    }
  if (_tf.is_rich_text)
    {
      [ret addObject: NSRTFPboardType];
    }
  [ret addObject: NSStringPboardType];

  return ret;
}

- (NSArray *) writablePasteboardTypes
{
  // the selected text can be written to the pasteboard with which types.
  return [self readablePasteboardTypes];
}

- (BOOL) writeSelectionToPasteboard: (NSPasteboard *)pboard
			       type: (NSString *)type
{
/*
Writes the current selection to pboard using the given type. Returns YES
if the data was successfully written. You can override this method to add
support for writing new types of data to the pasteboard. You should invoke
super's implementation of the method to handle any types of data your
overridden version does not.
*/

  return [self writeSelectionToPasteboard: pboard
	       types: [NSArray arrayWithObject: type]];
}

- (BOOL) writeSelectionToPasteboard: (NSPasteboard *)pboard
			      types: (NSArray *)types
{

/* Writes the current selection to pboard under each type in the types
array. Returns YES if the data for any single type was written
successfully.

You should not need to override this method. You might need to invoke this
method if you are implementing a new type of pasteboard to handle services
other than copy/paste or dragging. */
  BOOL ret = NO;
  NSEnumerator *enumerator;
  NSString *type;

  if (types == nil)
    {
      return NO;
    }
  
  if (_layoutManager->_selected_range.location == NSNotFound)
    {
      return NO;
    }

  [pboard declareTypes: types owner: self];
    
  enumerator = [types objectEnumerator];
  while ((type = [enumerator nextObject]) != nil)
    {
      if ([type isEqualToString: NSStringPboardType])
        {
	  ret = [pboard setString: [[self string] substringWithRange: _layoutManager->_selected_range] 
			forType: NSStringPboardType] || ret;
	}

      if ([type isEqualToString: NSRTFPboardType])
        {
	  ret = [pboard setData: [self RTFFromRange: _layoutManager->_selected_range]
			forType: NSRTFPboardType] || ret;
	}

      if ([type isEqualToString: NSRTFDPboardType])
        {
	  ret = [pboard setData: [self RTFDFromRange: _layoutManager->_selected_range]
			forType: NSRTFDPboardType] || ret;
	}

      if ([type isEqualToString: NSColorPboardType])
        {
	  NSColor	*color;

	  color = [_textStorage attribute: NSForegroundColorAttributeName
				  atIndex: _layoutManager->_selected_range.location
			   effectiveRange: 0];
	  if (color != nil)
	    {
	      [color writeToPasteboard:  pboard];
	      ret = YES;
	    }
	}

      if ([type isEqualToString: NSFontPboardType])
        {
	  NSDictionary	*dict;

	  dict = [_textStorage fontAttributesInRange: _layoutManager->_selected_range];
	  if (dict != nil)
	    {
	      [pboard setData: [NSArchiver archivedDataWithRootObject: dict]
		      forType: NSFontPboardType];
	      ret = YES;
	    }
	}

      if ([type isEqualToString: NSRulerPboardType])
        {
	  NSDictionary	*dict;

	  dict = [_textStorage rulerAttributesInRange: _layoutManager->_selected_range];
	  if (dict != nil)
	    {
	      [pboard setData: [NSArchiver archivedDataWithRootObject: dict]
		      forType: NSRulerPboardType];
	      ret = YES;
	    }
	}
    }

  return ret;
}

- (NSArray *) acceptableDragTypes
{
  return [self readablePasteboardTypes];
}

- (void) updateDragTypeRegistration
{
  /* TODO: Should change registration for all our text views

  This seems to be handled already; this will be called when the flags
  change, and those calls are made on all connected text views.
  */
  
  if (_tf.is_editable && _tf.is_rich_text)
    [self registerForDraggedTypes: [self acceptableDragTypes]];
  else
    [self unregisterDraggedTypes];
}



/**** Drag and drop handling ****/

// dragging of text, colors and files
- (NSDragOperation) draggingEntered: (id <NSDraggingInfo>)sender
{
  NSPasteboard	*pboard = [sender draggingPasteboard];
  NSArray	*types = [self readablePasteboardTypes];
  NSString	*type = [self preferredPasteboardTypeFromArray: [pboard types]
				    restrictedToTypesFromArray: types];
  unsigned int	flags = [self dragOperationForDraggingInfo: sender type: type];

  if (flags != NSDragOperationNone
      && ![type isEqual:NSColorPboardType])
    {
      NSPoint	dragPoint;
      unsigned	dragIndex;
      NSRange	dragRange;
      NSRange	range;

      if (_tf.isDragTarget == NO)
	{
	  _tf.isDragTarget = YES;
	  _dragTargetSelectionRange = [self selectedRange];
	}

      dragPoint = [sender draggingLocation];
      dragPoint = [self convertPoint: dragPoint fromView: nil];
      dragIndex = [self characterIndexForPoint: dragPoint];
      dragRange = NSMakeRange (dragIndex, 0);

      range = [self selectionRangeForProposedRange: dragRange
				       granularity: NSSelectByCharacter];
      [self setSelectedRange: range];
      [self displayIfNeeded];
    }
  return flags;
}

- (NSDragOperation) draggingUpdated: (id <NSDraggingInfo>)sender
{
  NSPasteboard	*pboard = [sender draggingPasteboard];
  NSArray	*types = [self readablePasteboardTypes];
  NSString	*type = [self preferredPasteboardTypeFromArray: [pboard types]
				    restrictedToTypesFromArray: types];
  unsigned int	flags = [self dragOperationForDraggingInfo: sender type: type];

  if (flags != NSDragOperationNone
      && ![type isEqual:NSColorPboardType])
    {
      NSPoint	dragPoint;
      unsigned	dragIndex;
      NSRange	dragRange;
      NSRange	range;

      if (_tf.isDragTarget == NO)
	{
	  _tf.isDragTarget = YES;
	  _dragTargetSelectionRange = [self selectedRange];
	}

      dragPoint = [sender draggingLocation];
      dragPoint = [self convertPoint: dragPoint fromView: nil];
      dragIndex = [self characterIndexForPoint: dragPoint];
      dragRange = NSMakeRange (dragIndex, 0);

      range = [self selectionRangeForProposedRange: dragRange
				       granularity: NSSelectByCharacter];
      [self setSelectedRange: range];
      [self displayIfNeeded];
    }
  return flags;
}

- (void) draggingExited: (id <NSDraggingInfo>)sender
{
  NSPasteboard	*pboard = [sender draggingPasteboard];
  NSArray	*types = [self readablePasteboardTypes];
  NSString	*type = [self preferredPasteboardTypeFromArray: [pboard types]
				    restrictedToTypesFromArray: types];
  if (_tf.isDragTarget == YES
      && ![type isEqual:NSColorPboardType])
    {
      _tf.isDragTarget = NO;
      [self setSelectedRange: _dragTargetSelectionRange];
      [self displayIfNeeded];
    }
}

- (BOOL) prepareForDragOperation: (id <NSDraggingInfo>)sender
{
  return YES;
}

- (BOOL) performDragOperation: (id <NSDraggingInfo>)sender
{
  _tf.isDragTarget = NO;
  return [self readSelectionFromPasteboard: [sender draggingPasteboard]];
}

- (void) concludeDragOperation: (id <NSDraggingInfo>)sender
{
  _tf.isDragTarget = NO;
}

- (void) cleanUpAfterDragOperation
{
  // release drag information
}

- (unsigned int) dragOperationForDraggingInfo: (id <NSDraggingInfo>)dragInfo 
					 type: (NSString *)type
{
  //TODO
  return NSDragOperationCopy | NSDragOperationGeneric;
}

- (NSImage *) dragImageForSelectionWithEvent: (NSEvent *)event
				      origin: (NSPoint *)origin
{
  if (origin)
    *origin = NSMakePoint(0, 0);

  return nil;
}

- (BOOL) dragSelectionWithEvent: (NSEvent *)event
			 offset: (NSSize)mouseOffset
		      slideBack: (BOOL)slideBack
{
  NSPoint point;
  NSImage *image = [self dragImageForSelectionWithEvent: event
			 origin: &point];
  NSPasteboard *pboard = [NSPasteboard pasteboardWithName: NSDragPboard];
  NSPoint location = [self convertPoint: [event locationInWindow] fromView: nil];
  NSMutableArray *types = [NSMutableArray array];

  if (_tf.imports_graphics)
    [types addObject: NSRTFDPboardType];

  if (_tf.is_rich_text)
    [types addObject: NSRTFPboardType];

  [types addObject: NSStringPboardType];

  [self writeSelectionToPasteboard: pboard types: types];

  [self dragImage: image at: location offset: mouseOffset event: event  
	pasteboard: pboard source: self slideBack: slideBack];

  return YES;
}


/**** Event handling ****/

- (void) mouseDown: (NSEvent *)theEvent
{
  NSSelectionAffinity affinity = [self selectionAffinity];
  NSSelectionGranularity granularity = NSSelectByCharacter;
  NSRange chosenRange, proposedRange;
  NSPoint point, startPoint;
  unsigned startIndex;

  /* If non selectable then ignore the mouse down. */
  if (_tf.is_selectable == NO)
    {
      return;
    }

  if (!_layoutManager)
    return;

  /* Otherwise, NSWindow has already made us first responder (if
     possible) */

  startPoint = [self convertPoint: [theEvent locationInWindow] fromView: nil];
  startIndex = [self characterIndexForPoint: startPoint];

  if (startIndex == (unsigned int)-1)
    {
      return;
    }
  
  if ([theEvent modifierFlags] & NSShiftKeyMask)
    {
      /* Shift-click is for extending an existing selection using 
	 the existing granularity */
      granularity = _layoutManager->_selectionGranularity;
      /* Compute the new selection */
      proposedRange = NSMakeRange (startIndex, 0);
      proposedRange = NSUnionRange (_layoutManager->_selected_range,
	proposedRange);
      proposedRange = [self selectionRangeForProposedRange: proposedRange
	granularity: granularity];
      /* Merge it with the old one */
      proposedRange = NSUnionRange (_layoutManager->_selected_range,
	proposedRange);
      /* Now decide what happens if the user shift-drags.  The range 
	 will be based in startIndex, so we need to adjust it. */
      if (startIndex <= _layoutManager->_selected_range.location) 
	{
	  startIndex = NSMaxRange (proposedRange);
	}
      else 
	{
	  startIndex = proposedRange.location;
	}
    }
  else /* No shift */
    {
      switch ([theEvent clickCount])
	{
	case 1: granularity = NSSelectByCharacter;
	  break;
	case 2: granularity = NSSelectByWord;
	  break;
	case 3: granularity = NSSelectByParagraph;
	  break;
	}

      proposedRange = NSMakeRange (startIndex, 0);

      /* We manage clicks on attachments and links only on the first
	 click, so that if you double-click on them, only the first
	 click gets sent to them; the other clicks select by
	 word/paragraph as usual.  */
      if (granularity == NSSelectByCharacter)
	{
	  NSTextAttachment *attachment;

	  /* Check if the click was on an attachment cell.  */
	  attachment = [_textStorage attribute: NSAttachmentAttributeName
				       atIndex: startIndex
				effectiveRange: NULL];
	      
	  if (attachment != nil)
	    {
	      id <NSTextAttachmentCell> cell = [attachment attachmentCell];

	      if (cell != nil)
		{
		  /* TODO: Where to get the cellFrame? */
		  NSRect cellFrame = NSMakeRect(0, 0, 0, 0);

		  /* TODO: What about the insertion point ? */
		  if ([cell wantsToTrackMouseForEvent: theEvent
			inRect: cellFrame
			ofView: self
			atCharacterIndex: startIndex]
		      && [cell trackMouse: theEvent
				   inRect: cellFrame 
				   ofView: self
			 atCharacterIndex: startIndex
			     untilMouseUp: NO])
		    {
		      return;
		    }
		}
	    }

	  /* This is the code for handling click event on a link (a link
	     is some chars with the NSLinkAttributeName set to something
	     which is not-null, a NSURL object usually).  */
	  {
	    /* What exactly is this link object, it's up to the
	       programmer who is using the NSTextView and who
	       originally created the link object and saved it under
	       the NSLinkAttributeName in the text.  Normally, a NSURL
	       object is used. */
	    /* TODO: should call -clickedOnLink:atIndex: instead */
	    id link = [_textStorage attribute: NSLinkAttributeName
				    atIndex: startIndex
				    effectiveRange: NULL];
	    if (link != nil  &&  _delegate != nil)
	      {
		SEL selector = @selector(textView:clickedOnLink:atIndex:);
		
		if ([_delegate respondsToSelector: selector])
		  {
		    /* Move the insertion point over the link.  */
		    chosenRange = [self selectionRangeForProposedRange: 
					  proposedRange
					granularity: granularity];

		    [self setSelectedRange: chosenRange  affinity: affinity  
			  stillSelecting: NO];

		    [self displayIfNeeded];

		    /* Now 'activate' the link.  The _delegate returns
		       YES if it handles the click, NO if it doesn't
		       -- and if it doesn't, we need to pass the click
		       to the next responder.  */
		    if ([_delegate textView: self  clickedOnLink: link  
				   atIndex: startIndex])
		      {
			return;
		      }
		    else
		      {
			[super mouseDown: theEvent];
			return; 
		      }
		  }
	      }
	  }
	}
    }

  chosenRange = [self selectionRangeForProposedRange: proposedRange
		      granularity: granularity];
  [self setSelectedRange: chosenRange  affinity: affinity  
	stillSelecting: YES];


  /* Enter modal loop tracking the mouse */
  {
    unsigned int mask = NSLeftMouseDraggedMask | NSLeftMouseUpMask
			| NSPeriodicMask;
    NSEvent *currentEvent;
    NSEvent *lastEvent = nil; /* Last non-periodic event. */
    NSDate *distantPast = [NSDate distantPast];
    BOOL gettingPeriodic, gotPeriodic;

    currentEvent = [_window nextEventMatchingMask: mask
		     untilDate: nil
		     inMode: NSEventTrackingRunLoopMode
		     dequeue: YES];
    gettingPeriodic = NO;
    do
      {
	gotPeriodic = NO;
	while (currentEvent && [currentEvent type] != NSLeftMouseUp)
	  {
	    if ([currentEvent type] == NSPeriodic)
	      {
		gotPeriodic = YES;
	      }
	    else
	      lastEvent = currentEvent;
	    currentEvent = [_window nextEventMatchingMask: mask
			     untilDate: distantPast
			     inMode: NSEventTrackingRunLoopMode
			     dequeue: YES];
	  }
	if (currentEvent && [currentEvent type] == NSLeftMouseUp)
	  break;

	/*
	Automatic scrolling.

	If we aren't getting periodic events, we check all events. If any of
	them causes us to scroll, we scroll and start up the periodic events.

	If we are getting periodic events, we only scroll when we receive a
	periodic event (and we use the last non-periodic event to determine
	how far). If no scrolling occurred, we stop the periodic events.
	*/
	if (!gettingPeriodic)
	  {
	    if ([self autoscroll: lastEvent])
	      {
		gettingPeriodic = YES;
		[NSEvent startPeriodicEventsAfterDelay: 0.1
					    withPeriod: 0.1];
		
	      }
	  }
	else if (gotPeriodic)
	  {
	    if (![self autoscroll: lastEvent])
	      {
		gettingPeriodic = NO;
		[NSEvent stopPeriodicEvents];
	      }
	  }


	point = [self convertPoint: [lastEvent locationInWindow]
		  fromView: nil];
	proposedRange = MakeRangeFromAbs([self characterIndexForPoint: point],
					 startIndex);
	chosenRange = [self selectionRangeForProposedRange: proposedRange
			granularity: granularity];
	[self setSelectedRange: chosenRange  affinity: affinity
	  stillSelecting: YES];

	currentEvent = [_window nextEventMatchingMask: mask
			 untilDate: nil
			 inMode: NSEventTrackingRunLoopMode
			 dequeue: YES];
      } while ([currentEvent type] != NSLeftMouseUp);

    if (gettingPeriodic)
      {
	[NSEvent stopPeriodicEvents];
      }
  }

  NSDebugLog(@"chosenRange. location  = %d, length  = %d\n",
	     (int)chosenRange.location, (int)chosenRange.length);

  [self setSelectedRange: chosenRange  affinity: affinity  
	stillSelecting: NO];

  /* Remember granularity till a new selection destroys the memory */
  [self setSelectionGranularity: granularity];
}

- (void) keyDown: (NSEvent *)theEvent
{
  // If not editable, don't recognize the key down
  if (_tf.is_editable == NO)
    {
      [super keyDown: theEvent];
    }
  else
    {
      [self interpretKeyEvents: [NSArray arrayWithObject: theEvent]];
    }
}

/* Bind other mouse up to pasteSelection. This should be done via
configuation! */
- (void) otherMouseUp: (NSEvent *)theEvent
{
  // TODO: Should we change the insertion point, based on the event position?
  [self pasteSelection];
}


@end


@implementation NSTextView (GNUstepPrivate)

- (void) _blink: (NSTimer *)t
{
#if 0 /* TODO: insertion point */
  if (_drawInsertionPointNow)
    {
      _drawInsertionPointNow = NO;
    }
  else
    {
      _drawInsertionPointNow = YES;
    }
  
  [self setNeedsDisplayInRect: _insertionPointRect
	avoidAdditionalLayout: YES];
  /* Because we are called by a timer which is independent of any
     event processing in the gui runloop, we need to manually update
     the window.  */
  [self displayIfNeeded];
#endif
}


- (NSRect) rectForCharacterRange: (NSRange)aRange
{
  NSRange glyphRange;
  NSRect rect;

  if (!aRange.length)
    return NSZeroRect;
  glyphRange = [_layoutManager glyphRangeForCharacterRange: aRange 
			       actualCharacterRange: NULL];
  rect = [_layoutManager boundingRectForGlyphRange: glyphRange 
			 inTextContainer: _textContainer];
  rect.origin.x += _textContainerOrigin.x;
  rect.origin.y += _textContainerOrigin.y;
  return rect;
}

/** Extension method that copies the current selected text to the 
    special section pasteboard */
- (void) copySelection
{
  [self writeSelectionToPasteboard: [NSPasteboard pasteboardWithName: @"Selection"]
	type: NSStringPboardType];
}

/** Extension method that pastes the current selected text from the 
    special section pasteboard */
- (void) pasteSelection
{
  [self readSelectionFromPasteboard: [NSPasteboard pasteboardWithName: @"Selection"]
	type: NSStringPboardType];
}



@end