/***	GENERIC STYLE IMPLEMENTATION FOR HYPERTEXT****	(c) COPYRIGHT MIT 1995.**	Please first read the full copyright statement in the file COPYRIGH.**	@(#) $Id: HTStyle.c,v 2.26 1999/02/22 22:10:12 frystyk Exp $****	Styles allow the translation between a logical property**	of a piece of text and its physical representation.****	A stylesheet is a collection of styles that can be applied**	to the layout engine, for example provided by the HText**	implementation.*//* Library include files */#include "wwwsys.h"#include "WWWUtil.h"#include "HTStyle.h"struct _HTStyle {    char *	name;		/* Style name */    int		element;	/* Element (if any) that this style applies to */    void *	context;	/* Implementation specific style context */};struct _HTStyleSheet {    char *	name;    HTList *	styles;};/* ------------------------------------------------------------------------- *//* 			      INDIVIDUAL STYLES				     *//* ------------------------------------------------------------------------- */PUBLIC HTStyle * HTStyle_new (const char * name, int element, void * context){    HTStyle * style = NULL;    if ((style = (HTStyle  *) HT_CALLOC(1, sizeof(HTStyle))) == NULL)        HT_OUTOFMEM("HTStyleNew");    StrAllocCopy(style->name, name ? name : "unknown");    style->element = element;    style->context = context;    return style;}PUBLIC BOOL HTStyle_delete  (HTStyle * me){    if (me) {	HT_FREE(me->name);	HT_FREE(me);	return YES;    }    return NO;}/* ------------------------------------------------------------------------- *//* 			          STYLE SHEETS				     *//* ------------------------------------------------------------------------- */PUBLIC HTStyleSheet * HTStyleSheet_new (const char * name){    HTStyleSheet * ss;    if ((ss = (HTStyleSheet *) HT_CALLOC(1, sizeof(HTStyleSheet))) == NULL)        HT_OUTOFMEM("HTStyleSheet_new");    StrAllocCopy(ss->name, name ? name : "unknown");    ss->styles = HTList_new();    return ss;}PUBLIC BOOL HTStyleSheet_delete (HTStyleSheet * me){    if (me) {	HTList * cur = me->styles;	HTStyle * pres;	while ((pres = (HTStyle *) HTList_nextObject(cur)))	    HTStyle_delete(pres);	HTList_delete(me->styles);	HT_FREE(me);	return YES;    }    return NO;}PUBLIC BOOL HTStyleSheet_addStyle (HTStyleSheet * me, HTStyle * style){    return (me && style) ? HTList_addObject(me->styles, style) : NO;}PUBLIC BOOL HTStyleSheet_deleteStyle (HTStyleSheet * me, HTStyle * style){    if (me && style) {	HTList_removeObject(me->styles, style);	HTStyle_delete(style);	return YES;    }    return NO;}PUBLIC HTStyle * HTStyleSheet_findStyleWithName (HTStyleSheet * me, const char * name){    if (me && name) {	HTList * cur = me->styles;	HTStyle * pres;	while ((pres = (HTStyle *) HTList_nextObject(cur))) {	    if (!strcasecomp(pres->name, name)) return pres;	}	HTTRACE(SGML_TRACE, "StyleSheet.. No style named `%s' in stylesheet `%s'\n" _ 		    name _ me->name);    }    return NULL;}PUBLIC HTStyle * HTStyleSheet_findStyleForElement (HTStyleSheet * me, int element){    if (me) {	HTList * cur = me->styles;	HTStyle * pres;	while ((pres = (HTStyle *) HTList_nextObject(cur))) {	    if (pres->element==element) return pres;	}	HTTRACE(SGML_TRACE, "StyleSheet.. No style for element %d in stylesheet `%s'\n" _ 		    element _ me->name);    }    return NULL;}