/*
* 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 border-spacing
*
* \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_border_spacing(css_language *c,
const parserutils_vector *vector, int *ctx,
css_style *result)
{
int orig_ctx = *ctx;
css_error error;
const css_token *token;
css_fixed length[2] = { 0 };
uint32_t unit[2] = { 0 };
bool match;
/* length length? | IDENT(inherit) */
token = parserutils_vector_peek(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)) {
parserutils_vector_iterate(vector, ctx);
/* inherit */
error = css__stylesheet_style_appendOPV(result,
CSS_PROP_BORDER_SPACING,
FLAG_INHERIT,
0);
} else {
int num_lengths = 0;
error = css__parse_unit_specifier(c, vector, ctx, UNIT_PX,
&length[0], &unit[0]);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
if (unit[0] & UNIT_ANGLE || unit[0] & UNIT_TIME ||
unit[0] & UNIT_FREQ || unit[0] & UNIT_PCT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
num_lengths = 1;
consumeWhitespace(vector, ctx);
token = parserutils_vector_peek(vector, *ctx);
if (token != NULL) {
/* Attempt second length, ignoring errors.
* The core !important parser will ensure
* any remaining junk is thrown out.
* Ctx will be preserved on error, as usual
*/
error = css__parse_unit_specifier(c, vector, ctx, UNIT_PX,
&length[1], &unit[1]);
if (error == CSS_OK) {
if (unit[1] & UNIT_ANGLE ||
unit[1] & UNIT_TIME ||
unit[1] & UNIT_FREQ ||
unit[1] & UNIT_PCT) {
*ctx = orig_ctx;
return CSS_INVALID;
}
num_lengths = 2;
}
}
if (num_lengths == 1) {
/* Only one length specified. Use for both axes. */
length[1] = length[0];
unit[1] = unit[0];
}
/* Lengths must not be negative */
if (length[0] < 0 || length[1] < 0) {
*ctx = orig_ctx;
return CSS_INVALID;
}
error = css__stylesheet_style_appendOPV(result,
CSS_PROP_BORDER_SPACING,
0,
BORDER_SPACING_SET);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
error = css__stylesheet_style_vappend(result,
4,
length[0],
unit[0],
length[1],
unit[1]);
}
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
return CSS_OK;
}