/*
* 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 list-style
*
* \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_list_style(css_language *c,
const parserutils_vector *vector, int *ctx,
css_style *result)
{
int orig_ctx = *ctx;
int prev_ctx;
const css_token *token;
css_error error;
bool image = true;
bool position = true;
bool type = true;
css_style *image_style;
css_style *position_style;
css_style *type_style;
/* Firstly, handle inherit */
token = parserutils_vector_peek(vector, *ctx);
if (token == NULL)
return CSS_INVALID;
if (is_css_inherit(c, token)) {
error = css_stylesheet_style_inherit(result, CSS_PROP_LIST_STYLE_IMAGE);
if (error != CSS_OK)
return error;
error = css_stylesheet_style_inherit(result, CSS_PROP_LIST_STYLE_POSITION);
if (error != CSS_OK)
return error;
error = css_stylesheet_style_inherit(result, CSS_PROP_LIST_STYLE_TYPE);
if (error == CSS_OK)
parserutils_vector_iterate(vector, ctx);
return error;
}
/* allocate styles */
error = css__stylesheet_style_create(c->sheet, &image_style);
if (error != CSS_OK)
return error;
error = css__stylesheet_style_create(c->sheet, &position_style);
if (error != CSS_OK) {
css__stylesheet_style_destroy(image_style);
return error;
}
error = css__stylesheet_style_create(c->sheet, &type_style);
if (error != CSS_OK) {
css__stylesheet_style_destroy(image_style);
css__stylesheet_style_destroy(position_style);
return error;
}
/* Attempt to parse the various longhand properties */
do {
prev_ctx = *ctx;
error = CSS_OK;
/* Ensure that we're not about to parse another inherit */
token = parserutils_vector_peek(vector, *ctx);
if (token != NULL && is_css_inherit(c, token)) {
error = CSS_INVALID;
goto css__parse_list_style_cleanup;
}
if ((type) &&
(error = css__parse_list_style_type(c, vector,
ctx, type_style)) == CSS_OK) {
type = false;
} else if ((position) &&
(error = css__parse_list_style_position(c, vector,
ctx, position_style)) == CSS_OK) {
position = false;
} else if ((image) &&
(error = css__parse_list_style_image(c, vector, ctx,
image_style)) == CSS_OK) {
image = false;
}
if (error == CSS_OK) {
consumeWhitespace(vector, ctx);
token = parserutils_vector_peek(vector, *ctx);
} else {
/* Forcibly cause loop to exit */
token = NULL;
}
} while (*ctx != prev_ctx && token != NULL);
/* defaults */
if (image) {
error = css__stylesheet_style_appendOPV(image_style,
CSS_PROP_LIST_STYLE_IMAGE,
0, LIST_STYLE_IMAGE_NONE);
}
if (position) {
error = css__stylesheet_style_appendOPV(position_style,
CSS_PROP_LIST_STYLE_POSITION,
0, LIST_STYLE_POSITION_OUTSIDE);
}
if (type) {
error = css__stylesheet_style_appendOPV(type_style,
CSS_PROP_LIST_STYLE_TYPE,
0, LIST_STYLE_TYPE_DISC);
}
error = css__stylesheet_merge_style(result, image_style);
if (error != CSS_OK)
goto css__parse_list_style_cleanup;
error = css__stylesheet_merge_style(result, position_style);
if (error != CSS_OK)
goto css__parse_list_style_cleanup;
error = css__stylesheet_merge_style(result, type_style);
css__parse_list_style_cleanup:
css__stylesheet_style_destroy(type_style);
css__stylesheet_style_destroy(position_style);
css__stylesheet_style_destroy(image_style);
if (error != CSS_OK)
*ctx = orig_ctx;
return error;
}