/*
* This file is part of LibCSS.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2008 John-Mark Bell <jmb@netsurf-browser.org>
*/
#ifndef css_css__parse_language_h_
#define css_css__parse_language_h_
#include <parserutils/utils/stack.h>
#include <parserutils/utils/vector.h>
#include <libcss/functypes.h>
#include <libcss/types.h>
#include "lex/lex.h"
#include "parse/parse.h"
#include "parse/propstrings.h"
/**
* CSS namespace mapping
*/
typedef struct css_namespace {
lwc_string *prefix; /**< Namespace prefix */
lwc_string *uri; /**< Namespace URI */
} css_namespace;
/**
* Context for a CSS language parser
*/
typedef struct css_language {
css_stylesheet *sheet; /**< The stylesheet to parse for */
#define STACK_CHUNK 32
parserutils_stack *context; /**< Context stack */
enum {
CHARSET_PERMITTED,
IMPORT_PERMITTED,
NAMESPACE_PERMITTED,
HAD_RULE
} state; /**< State flag, for at-rule handling */
/** Interned strings */
lwc_string **strings;
lwc_string *default_namespace; /**< Default namespace URI */
css_namespace *namespaces; /**< Array of namespace mappings */
uint32_t num_namespaces; /**< Number of namespace mappings */
css_allocator_fn alloc; /**< Memory (de)allocation function */
void *pw; /**< Client's private data */
} css_language;
css_error css__language_create(css_stylesheet *sheet, css_parser *parser,
css_allocator_fn alloc, void *pw, void **language);
css_error css__language_destroy(css_language *language);
/******************************************************************************
* Helper functions *
******************************************************************************/
/**
* Consume all leading whitespace tokens
*
* \param vector The vector to consume from
* \param ctx The vector's context
*/
static inline void consumeWhitespace(const parserutils_vector *vector, int *ctx)
{
const css_token *token = NULL;
while ((token = parserutils_vector_peek(vector, *ctx)) != NULL &&
token->type == CSS_TOKEN_S)
parserutils_vector_iterate(vector, ctx);
}
/**
* Determine if a token is a character
*
* \param token The token to consider
* \param c The character to match (lowercase ASCII only)
* \return True if the token matches, false otherwise
*/
static inline bool tokenIsChar(const css_token *token, uint8_t c)
{
bool result = false;
if (token != NULL && token->type == CSS_TOKEN_CHAR &&
lwc_string_length(token->idata) == 1) {
char d = lwc_string_data(token->idata)[0];
/* Ensure lowercase comparison */
if ('A' <= d && d <= 'Z')
d += 'a' - 'A';
result = (d == c);
}
return result;
}
#endif