/*
* 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 content
*
* \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_content(css_language *c,
const parserutils_vector *vector, int *ctx,
css_style *result)
{
int orig_ctx = *ctx;
css_error error;
const css_token *token;
bool match;
/* IDENT(normal, none, inherit) | [ ... ]+ */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL) {
*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)) {
error = css_stylesheet_style_inherit(result, CSS_PROP_CONTENT);
} else if ((token->type == CSS_TOKEN_IDENT) &&
(lwc_string_caseless_isequal(token->idata,
c->strings[NORMAL],
&match) == lwc_error_ok && match)) {
error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NORMAL);
} else if ((token->type == CSS_TOKEN_IDENT) &&
(lwc_string_caseless_isequal(token->idata,
c->strings[NONE],
&match) == lwc_error_ok && match)) {
error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NONE);
} else {
/* Macro to output the value marker, awkward because we need to check
* first to determine how the value is constructed.
*/
#define CSS_APPEND(CSSVAL) css__stylesheet_style_append(result, first?buildOPV(CSS_PROP_CONTENT, 0, CSSVAL):CSSVAL)
bool first = true;
int prev_ctx = orig_ctx;
/* [
* IDENT(open-quote, close-quote, no-open-quote,
* no-close-quote) |
* STRING |
* URI |
* FUNCTION(attr) IDENT ')' |
* FUNCTION(counter) IDENT IDENT? ')' |
* FUNCTION(counters) IDENT STRING IDENT? ')'
* ]+
*/
while (token != NULL) {
if ((token->type == CSS_TOKEN_IDENT) &&
(lwc_string_caseless_isequal(
token->idata, c->strings[OPEN_QUOTE],
&match) == lwc_error_ok && match)) {
error = CSS_APPEND(CONTENT_OPEN_QUOTE);
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[CLOSE_QUOTE],
&match) == lwc_error_ok && match)) {
error = CSS_APPEND(CONTENT_CLOSE_QUOTE);
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[NO_OPEN_QUOTE],
&match) == lwc_error_ok && match)) {
error = CSS_APPEND(CONTENT_NO_OPEN_QUOTE);
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[NO_CLOSE_QUOTE],
&match) == lwc_error_ok && match)) {
error = CSS_APPEND(CONTENT_NO_CLOSE_QUOTE);
} else if (token->type == CSS_TOKEN_STRING) {
uint32_t snumber;
error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = CSS_APPEND(CONTENT_STRING);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, snumber);
} else if (token->type == CSS_TOKEN_URI) {
lwc_string *uri;
uint32_t uri_snumber;
error = c->sheet->resolve(c->sheet->resolve_pw,
c->sheet->url,
token->idata,
&uri);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_string_add(c->sheet,
uri,
&uri_snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = CSS_APPEND(CONTENT_URI);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, uri_snumber);
} else if (token->type == CSS_TOKEN_FUNCTION &&
(lwc_string_caseless_isequal(
token->idata, c->strings[ATTR],
&match) == lwc_error_ok && match)) {
uint32_t snumber;
consumeWhitespace(vector, ctx);
/* Expect IDENT */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || token->type != CSS_TOKEN_IDENT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = CSS_APPEND(CONTENT_ATTR);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, snumber);
consumeWhitespace(vector, ctx);
/* Expect ')' */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || tokenIsChar(token, ')') == false) {
*ctx = orig_ctx;
return CSS_INVALID;
}
} else if (token->type == CSS_TOKEN_FUNCTION &&
(lwc_string_caseless_isequal(
token->idata, c->strings[COUNTER],
&match) == lwc_error_ok && match)) {
lwc_string *name;
uint32_t snumber;
uint32_t opv;
opv = CONTENT_COUNTER;
consumeWhitespace(vector, ctx);
/* Expect IDENT */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || token->type != CSS_TOKEN_IDENT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
name = token->idata;
consumeWhitespace(vector, ctx);
/* Possible ',' */
token = parserutils_vector_peek(vector, *ctx);
if (token == NULL ||
(tokenIsChar(token, ',') == false &&
tokenIsChar(token, ')') == false)) {
*ctx = orig_ctx;
return CSS_INVALID;
}
if (tokenIsChar(token, ',')) {
uint16_t v;
parserutils_vector_iterate(vector, ctx);
consumeWhitespace(vector, ctx);
/* Expect IDENT */
token = parserutils_vector_peek(vector, *ctx);
if (token == NULL || token->type !=
CSS_TOKEN_IDENT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__parse_list_style_type_value(c, token, &v);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
opv |= v << CONTENT_COUNTER_STYLE_SHIFT;
parserutils_vector_iterate(vector, ctx);
consumeWhitespace(vector, ctx);
} else {
opv |= LIST_STYLE_TYPE_DECIMAL <<
CONTENT_COUNTER_STYLE_SHIFT;
}
/* Expect ')' */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || tokenIsChar(token, ')') == false) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = CSS_APPEND(opv);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, snumber);
} else if (token->type == CSS_TOKEN_FUNCTION &&
(lwc_string_caseless_isequal(
token->idata, c->strings[COUNTERS],
&match) == lwc_error_ok && match)) {
lwc_string *name;
lwc_string *sep;
uint32_t name_snumber;
uint32_t sep_snumber;
uint32_t opv;
opv = CONTENT_COUNTERS;
consumeWhitespace(vector, ctx);
/* Expect IDENT */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || token->type != CSS_TOKEN_IDENT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
name = token->idata;
consumeWhitespace(vector, ctx);
/* Expect ',' */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || tokenIsChar(token, ',') == false) {
*ctx = orig_ctx;
return CSS_INVALID;
}
consumeWhitespace(vector, ctx);
/* Expect STRING */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || token->type != CSS_TOKEN_STRING) {
*ctx = orig_ctx;
return CSS_INVALID;
}
sep = token->idata;
consumeWhitespace(vector, ctx);
/* Possible ',' */
token = parserutils_vector_peek(vector, *ctx);
if (token == NULL ||
(tokenIsChar(token, ',') == false &&
tokenIsChar(token, ')') == false)) {
*ctx = orig_ctx;
return CSS_INVALID;
}
if (tokenIsChar(token, ',')) {
uint16_t v;
parserutils_vector_iterate(vector, ctx);
consumeWhitespace(vector, ctx);
/* Expect IDENT */
token = parserutils_vector_peek(vector, *ctx);
if (token == NULL || token->type !=
CSS_TOKEN_IDENT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__parse_list_style_type_value(c,
token, &v);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
opv |= v << CONTENT_COUNTERS_STYLE_SHIFT;
parserutils_vector_iterate(vector, ctx);
consumeWhitespace(vector, ctx);
} else {
opv |= LIST_STYLE_TYPE_DECIMAL <<
CONTENT_COUNTERS_STYLE_SHIFT;
}
/* Expect ')' */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || tokenIsChar(token, ')') == false) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &name_snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_string_add(c->sheet, lwc_string_ref(sep), &sep_snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = CSS_APPEND(opv);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, name_snumber);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_append(result, sep_snumber);
} else if (first) {
/* Invalid if this is the first iteration */
error = CSS_INVALID;
} else {
/* Give up, ensuring current token is reprocessed */
*ctx = prev_ctx;
error = CSS_OK;
break;
}
/* if there was an error bail */
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
first = false;
consumeWhitespace(vector, ctx);
prev_ctx = *ctx;
token = parserutils_vector_iterate(vector, ctx);
} /* while */
/* Write list terminator */
css__stylesheet_style_append(result, CONTENT_NORMAL);
}
if (error != CSS_OK)
*ctx = orig_ctx;
return error;
}