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/*
* 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 background-image
*
* \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 parse_background_image(css_language *c,
const parserutils_vector *vector, int *ctx,
css_style **result)
{
int orig_ctx = *ctx;
css_error error;
const css_token *token;
uint8_t flags = 0;
uint16_t value = 0;
uint32_t opv;
uint32_t required_size;
bool match;
lwc_string *uri = NULL;
/* URI | IDENT (none, inherit) */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || (token->type != CSS_TOKEN_IDENT &&
token->type != CSS_TOKEN_URI)) {
*ctx = orig_ctx;
return CSS_INVALID;
}
if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[INHERIT],
&match) == lwc_error_ok && match)) {
flags |= FLAG_INHERIT;
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[NONE],
&match) == lwc_error_ok && match)) {
value = BACKGROUND_IMAGE_NONE;
} else if (token->type == CSS_TOKEN_URI) {
value = BACKGROUND_IMAGE_URI;
error = c->sheet->resolve(c->sheet->resolve_pw,
c->sheet->url,
token->idata, &uri);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
} else {
*ctx = orig_ctx;
return CSS_INVALID;
}
opv = buildOPV(CSS_PROP_BACKGROUND_IMAGE, flags, value);
required_size = sizeof(opv);
if ((flags & FLAG_INHERIT) == false && value == BACKGROUND_IMAGE_URI)
required_size += sizeof(lwc_string *);
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, required_size, result);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
/* Copy the bytecode to it */
memcpy((*result)->bytecode, &opv, sizeof(opv));
if ((flags & FLAG_INHERIT) == false && value == BACKGROUND_IMAGE_URI) {
/* Don't ref URI -- we want to pass ownership to the bytecode */
memcpy((uint8_t *) (*result)->bytecode + sizeof(opv),
&uri, sizeof(lwc_string *));
}
return CSS_OK;
}
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