//---------------------------------------------------------------------------------------
//  EDStyleSheetContext.m created by erik on Thu Jun 13 2002
//  @(#)$Id: EDStyleSheetContext.m,v 1.2 2002-12-16 22:42:34 erik Exp $
//
//  Copyright (c) 2002 by Erik Doernenburg. All rights reserved.
//
//  Permission to use, copy, modify and distribute this software and its documentation
//  is hereby granted, provided that both the copyright notice and this permission
//  notice appear in all copies of the software, derivative works or modified versions,
//  and any portions thereof, and that both notices appear in supporting documentation,
//  and that credit is given to Erik Doernenburg in all documents and publicity
//  pertaining to direct or indirect use of this code or its derivatives.
//
//  THIS IS EXPERIMENTAL SOFTWARE AND IT IS KNOWN TO HAVE BUGS, SOME OF WHICH MAY HAVE
//  SERIOUS CONSEQUENCES. THE COPYRIGHT HOLDER ALLOWS FREE USE OF THIS SOFTWARE IN ITS
//  "AS IS" CONDITION. THE COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY
//  DAMAGES WHATSOEVER RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE
//  OR OF ANY DERIVATIVE WORK.
//---------------------------------------------------------------------------------------

#import <Foundation/Foundation.h>
#import "EDStyleSheetContext.h"


//---------------------------------------------------------------------------------------
    @implementation EDStyleSheetContext
//---------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------
//	FACTORY
//---------------------------------------------------------------------------------------

+ (id)contextWithParentContext:(EDStyleSheetContext *)parent
{
    return [[[EDStyleSheetContext allocWithZone:[parent zone]] initWithParentContext:parent] autorelease];
}


//---------------------------------------------------------------------------------------
//	INIT & DEALLOC
//---------------------------------------------------------------------------------------

- (id)init
{
    [super init];
    variableBindings = [[NSMutableDictionary allocWithZone:[self zone]] init];
	shouldOmitSpaces = NSZoneCalloc([self zone], 1, sizeof(BOOL));
    return self;
}


- (id)initWithParentContext:(EDStyleSheetContext *)aContext
{
    [super init];
    variableBindings = [[NSMutableDictionary allocWithZone:[self zone]] init];
    parentContext = [aContext retain];
	shouldOmitSpaces = aContext->shouldOmitSpaces;
    return self;
}


- (void)dealloc
{
	if(parentContext == nil)
		NSZoneFree([self zone], shouldOmitSpaces);
    [variableBindings release];
    [parentContext release];
    [super dealloc];
}


//---------------------------------------------------------------------------------------
//  ACCESSOR METHODS FOR VARIABLES
//---------------------------------------------------------------------------------------

- (void)setValue:(id)value forVariable:(NSString *)variable
{
    [variableBindings setObject:value forKey:variable];
}


- (void)removeValueForVariable:(NSString *)variable
{
    [variableBindings removeObjectForKey:variable];
}


- (id)valueForVariable:(NSString *)variable
{
    NSArray	 *elements;
    NSString *key;
    id		 value;
    int		 i, n;

    elements = [variable componentsSeparatedByString:@"."];
    if((value = [variableBindings objectForKey:[elements objectAtIndex:0]]) == nil)
        return [parentContext valueForVariable:variable];
    for(i = 1, n = [elements count]; i < n; i++)
        {
        key = [elements objectAtIndex:i];
        value = [key isEqualToString:@"class"] ? NSStringFromClass([value class]) : [value valueForKey:key];
        }
    return value;
}


//---------------------------------------------------------------------------------------
//  ACCESSOR METHODS FOR SPACE HANDLING
//---------------------------------------------------------------------------------------

- (void)setShouldOmitSpaces:(BOOL)flag
{
    *shouldOmitSpaces = flag;
}

- (BOOL)shouldOmitSpaces
{
    return *shouldOmitSpaces;
}


//---------------------------------------------------------------------------------------
    @end
//---------------------------------------------------------------------------------------