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/*
* 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>
*/
#include "parse/css21.h"
#include "parse/parse.h"
#include "utils/utils.h"
/**
* Context for a CSS 2.1 parser
*/
struct css_css21 {
css_stylesheet *sheet; /**< The stylesheet to parse for */
css_parser *parser; /**< The underlying core parser */
css_alloc alloc; /**< Memory (de)allocation function */
void *pw; /**< Client's private data */
};
static bool css21_handle_event(css_parser_event type,
const parserutils_vector *tokens, void *pw);
static inline bool handleStartStylesheet(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleEndStylesheet(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleStartRuleset(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleEndRuleset(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleStartAtRule(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleEndAtRule(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleStartBlock(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleEndBlock(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleBlockContent(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleSelector(css_css21 *c,
const parserutils_vector *vector);
static inline bool handleDeclaration(css_css21 *c,
const parserutils_vector *vector);
/**
* Create a CSS 2.1 parser
*
* \param sheet The stylesheet object to parse for
* \param parser The core parser object to use
* \param alloc Memory (de)allocation function
* \param pw Pointer to client-specific private data
* \return Pointer to parser object, or NULL on failure
*/
css_css21 *css_css21_create(css_stylesheet *sheet, css_parser *parser,
css_alloc alloc, void *pw)
{
css_css21 *css21;
css_parser_optparams params;
css_error error;
if (sheet == NULL || parser == NULL || alloc == NULL)
return NULL;
css21 = alloc(NULL, sizeof(css_css21), pw);
if (css21 == NULL)
return NULL;
params.event_handler.handler = css21_handle_event;
params.event_handler.pw = css21;
error = css_parser_setopt(parser, CSS_PARSER_EVENT_HANDLER, ¶ms);
if (error != CSS_OK) {
alloc(css21, 0, pw);
return NULL;
}
css21->sheet = sheet;
css21->parser = parser;
css21->alloc = alloc;
css21->pw = pw;
return css21;
}
/**
* Destroy a CSS 2.1 parser
*
* \param css21 The parser to destroy
*/
void css_css21_destroy(css_css21 *css21)
{
if (css21 == NULL)
return;
css21->alloc(css21, 0, css21->pw);
}
/**
* Handler for core parser events
*
* \param type The event type
* \param tokens Vector of tokens read since last event, or NULL
* \param pw Pointer to handler context
* \return False to signal parse error, true otherwise
*/
bool css21_handle_event(css_parser_event type, const parserutils_vector *tokens,
void *pw)
{
css_css21 *css21 = (css_css21 *) pw;
switch (type) {
case CSS_PARSER_START_STYLESHEET:
return handleStartStylesheet(css21, tokens);
case CSS_PARSER_END_STYLESHEET:
return handleEndStylesheet(css21, tokens);
case CSS_PARSER_START_RULESET:
return handleStartRuleset(css21, tokens);
case CSS_PARSER_END_RULESET:
return handleEndRuleset(css21, tokens);
case CSS_PARSER_START_ATRULE:
return handleStartAtRule(css21, tokens);
case CSS_PARSER_END_ATRULE:
return handleEndAtRule(css21, tokens);
case CSS_PARSER_START_BLOCK:
return handleStartBlock(css21, tokens);
case CSS_PARSER_END_BLOCK:
return handleEndBlock(css21, tokens);
case CSS_PARSER_BLOCK_CONTENT:
return handleBlockContent(css21, tokens);
case CSS_PARSER_SELECTOR:
return handleSelector(css21, tokens);
case CSS_PARSER_DECLARATION:
return handleDeclaration(css21, tokens);
}
return true;
}
/******************************************************************************
* Parser stages *
******************************************************************************/
bool handleStartStylesheet(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleEndStylesheet(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleStartRuleset(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleEndRuleset(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleStartAtRule(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleEndAtRule(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleStartBlock(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleEndBlock(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleBlockContent(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleSelector(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
bool handleDeclaration(css_css21 *c, const parserutils_vector *vector)
{
UNUSED(c);
UNUSED(vector);
return true;
}
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