third_party/blink/renderer/core/css/properties/shorthands/webkit_margin_collapse_custom.cc

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/css/properties/shorthands/webkit_margin_collapse.h"

#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_context.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_fast_paths.h"
#include "third_party/blink/renderer/core/css/parser/css_property_parser_helpers.h"

namespace blink {
namespace css_shorthand {

bool WebkitMarginCollapse::ParseShorthand(
    bool important,
    CSSParserTokenRange& range,
    const CSSParserContext& context,
    const CSSParserLocalContext&,
    HeapVector<CSSPropertyValue, 256>& properties) const {
  CSSValueID id = range.ConsumeIncludingWhitespace().Id();
  if (!CSSParserFastPaths::IsValidKeywordPropertyAndValue(
          CSSPropertyID::kWebkitMarginBeforeCollapse, id, context.Mode()))
    return false;

  CSSValue* before_collapse = CSSIdentifierValue::Create(id);
  css_property_parser_helpers::AddProperty(
      CSSPropertyID::kWebkitMarginBeforeCollapse,
      CSSPropertyID::kWebkitMarginCollapse, *before_collapse, important,
      css_property_parser_helpers::IsImplicitProperty::kNotImplicit,
      properties);

  if (range.AtEnd()) {
    css_property_parser_helpers::AddProperty(
        CSSPropertyID::kWebkitMarginAfterCollapse,
        CSSPropertyID::kWebkitMarginCollapse, *before_collapse, important,
        css_property_parser_helpers::IsImplicitProperty::kNotImplicit,
        properties);
    return true;
  }

  id = range.ConsumeIncludingWhitespace().Id();
  if (!CSSParserFastPaths::IsValidKeywordPropertyAndValue(
          CSSPropertyID::kWebkitMarginAfterCollapse, id, context.Mode()))
    return false;
  css_property_parser_helpers::AddProperty(
      CSSPropertyID::kWebkitMarginAfterCollapse,
      CSSPropertyID::kWebkitMarginCollapse, *CSSIdentifierValue::Create(id),
      important, css_property_parser_helpers::IsImplicitProperty::kNotImplicit,
      properties);
  return true;
}

}  // namespace css_shorthand
}  // namespace blink