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/*

 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"

 *  

 *  R.app Copyright notes:

 *                     Copyright (C) 2004-5  The R Foundation

 *                     written by Stefano M. Iacus and Simon Urbanek

 *

 *                  

 *  R Copyright notes:

 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka

 *                     Copyright (C) 1998-2001   The R Development Core Team

 *                     Copyright (C) 2002-2004   The R Foundation

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program 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 General Public License for more details.

 *

 *  A copy of the GNU General Public License is available via WWW at

 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by

 *  writing to the Free Software Foundation, Inc., 59 Temple Place,

 *  Suite 330, Boston, MA  02111-1307  USA.

 *

 *  Created by Simon Urbanek on 1/11/05.

 */

#import "RConsoleTextStorage.h"

#import "RController.h" // for currentFont

@implementation RConsoleTextStorage

- (id) init

{

	self = [super init];

	if (self) {

		cont = [[NSMutableAttributedString alloc] init];

		theFont = [[[RController sharedController] currentFont] retain];

		lastUsedColor = nil;

	}

	return self;

}

- (void) dealloc

{

	[cont release];

	[theFont release];

	if(lastUsedColor) [lastUsedColor release];

	[super dealloc];

}

// mandatory primitive methods

- (NSString*) string

{

	return [cont string];

}

- (NSDictionary *) attributesAtIndex:(NSUInteger)index effectiveRange:(NSRangePointer)aRange

{

	return [cont attributesAtIndex:index effectiveRange:aRange];

}

- (void) replaceCharactersInRange:(NSRange)aRange withString:(NSString *)aString

{

	//NSLog(@"replace [%d/%d] by %d chars [%@]", aRange.location, aRange.length, [aString length], aString);

	[cont replaceCharactersInRange:aRange withString:aString];

	[self edited:NSTextStorageEditedCharacters range:aRange changeInLength:[aString length]-aRange.length];

}

- (void)setAttributes:(NSDictionary *)attributes range:(NSRange)aRange

{

	//NSLog(@"attrs set at [%d/%d] which amounts to [:%d] and cur len is %d",  aRange.location, aRange.length, aRange.location+aRange.length, [cont length]);

	[cont setAttributes:attributes range:aRange];

	[self edited:NSTextStorageEditedAttributes range:aRange changeInLength:0];

}

// end of primitive methods

// This is the default method for writing text to the console. Note that the application should use begin/endEditing and in addition to textStorage methods it may want to use setSelectedRange: and scrollRangeToVisible: of textView to update the text caret.

- (void) insertText: (NSString*) text atIndex: (int) index withColor: (NSColor*) color

{

	//NSLog(@"insert %d chars at %d to result in %d length", [text length], index, [cont length]+[text length]);

	[cont replaceCharactersInRange: NSMakeRange(index,0) withString: text];

	// cont will use the current attributes at cursor location, change them only if color or font were changed

	if(!lastUsedColor || lastUsedColor != color) {

		if(lastUsedColor) [lastUsedColor release];

		lastUsedColor = [color retain];

		[cont addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:

				theFont, NSFontAttributeName, 

				color, NSForegroundColorAttributeName,

			nil] range:NSMakeRange(index, [text length])];

	}

	[self edited:NSTextStorageEditedCharacters|NSTextStorageEditedAttributes range: NSMakeRange(index,0) changeInLength:[text length]];

}

- (void)setFont:(NSFont*)aFont

{

	if(theFont) [theFont release], theFont = nil;

	theFont = [aFont retain];

	if(lastUsedColor) [lastUsedColor release], lastUsedColor = nil;

}

@end