/* * This file is part of LibCSS. * Licensed under the MIT License, *		  http://www.opensource.org/licenses/mit-license.php * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org> */ #include <assert.h>#include <string.h> #include "bytecode/bytecode.h"#include "bytecode/opcodes.h"#include "parse/properties/properties.h"#include "parse/properties/utils.h" /** * Parse pause shorthand * * \param c	  Parsing context * \param vector  Vector of tokens to process * \param ctx	  Pointer to vector iteration context * \param result  Pointer to location to receive resulting style * \return CSS_OK on success, *	   CSS_NOMEM on memory exhaustion, *	   CSS_INVALID if the input is not valid * * Post condition: \a *ctx is updated with the next token to process *		   If the input is invalid, then \a *ctx remains unchanged. */css_error css__parse_pause(css_language *c,		const parserutils_vector *vector, int *ctx,		css_style *result){	int orig_ctx = *ctx;	css_error error;	const css_token *first_token;	const css_token *token; 	/* one or two tokens follow:	 *  if one emit for both BEFORE and AFTER	 *  if two first is before second is after	 *  tokens are either IDENT:none or URI	 */ 	first_token = parserutils_vector_peek(vector, *ctx); 	error = css__parse_pause_before(c, vector, ctx, result);	if (error == CSS_OK) {		/* first token parsed */ 		consumeWhitespace(vector, ctx); 		token = parserutils_vector_peek(vector, *ctx);		if (token == NULL)  {			/* no second token, re-parse the first */			*ctx = orig_ctx;			error = css__parse_pause_after(c, vector, ctx, result);		} else {			/* second token - might be useful */			if (is_css_inherit(c, token)) {				/* another bogus inherit */				error = CSS_INVALID;			} else {				error = css__parse_pause_after(c, vector, ctx, result);				if (error == CSS_OK) { 					/* second token parsed */					if (is_css_inherit(c, first_token)) {						/* valid second token after inherit */						error = CSS_INVALID;					}				} else {					/* second token appears to be junk re-try with first */					*ctx = orig_ctx;					error = css__parse_pause_after(c, vector, ctx, result);				}			}		}	}  	if (error != CSS_OK)		*ctx = orig_ctx; 	return error;}