/*
* 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;
}