/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "third_party/blink/renderer/core/html/html_li_element.h"

#include "third_party/blink/renderer/core/css/css_counter_value.h"
#include "third_party/blink/renderer/core/css/css_custom_ident_value.h"
#include "third_party/blink/renderer/core/css/css_numeric_literal_value.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/layout_tree_builder_traversal.h"
#include "third_party/blink/renderer/core/html/list_item_ordinal.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/keywords.h"

namespace blink {

HTMLLIElement::HTMLLIElement(Document& document)
    : HTMLElement(html_names::kLiTag, document) {}

bool HTMLLIElement::IsPresentationAttribute(const QualifiedName& name) const {
  if (name == html_names::kTypeAttr ||
      (RuntimeEnabledFeatures::CSSListCounterAccountingEnabled() &&
       name == html_names::kValueAttr)) {
    return true;
  }
  return HTMLElement::IsPresentationAttribute(name);
}

AtomicString ListTypeAttributeToStyleName(const AtomicString& value) {
  if (value.length() == 1) {
    switch (value[0]) {
      case 'a':
        return keywords::kLowerAlpha;
      case 'A':
        return keywords::kUpperAlpha;
      case 'i':
        return keywords::kLowerRoman;
      case 'I':
        return keywords::kUpperRoman;
      case '1':
        return keywords::kDecimal;
    }
    return g_null_atom;
  }
  if (EqualIgnoringAsciiCase(value, keywords::kDisc)) {
    return keywords::kDisc;
  }
  if (EqualIgnoringAsciiCase(value, keywords::kCircle)) {
    return keywords::kCircle;
  }
  if (EqualIgnoringAsciiCase(value, keywords::kSquare)) {
    return keywords::kSquare;
  }
  return g_null_atom;
}

void HTMLLIElement::CollectStyleForPresentationAttribute(
    const QualifiedName& name,
    const AtomicString& value,
    HeapVector<CSSPropertyValue, 8>& style) {
  if (name == html_names::kTypeAttr) {
    if (EqualIgnoringAsciiCase(value, keywords::kNone)) {
      AddPropertyToPresentationAttributeStyle(
          style, CSSPropertyID::kListStyleType, CSSValueID::kNone);
    } else {
      AtomicString list_style_type_name = ListTypeAttributeToStyleName(value);
      if (!list_style_type_name.IsNull()) {
        AddPropertyToPresentationAttributeStyle(
            style, CSSPropertyID::kListStyleType,
            *MakeGarbageCollected<CSSCustomIdentValue>(list_style_type_name));
      }
    }
  } else if (RuntimeEnabledFeatures::CSSListCounterAccountingEnabled() &&
             name == html_names::kValueAttr) {
    int parsed_value = 0;
    if (!ParseHTMLInteger(value, parsed_value)) {
      return;
    }
    // https://html.spec.whatwg.org/multipage/rendering.html#lists
    const CSSCustomIdentValue* identifier =
        MakeGarbageCollected<CSSCustomIdentValue>(AtomicString("list-item"));
    const CSSNumericLiteralValue* numeric_literal_value =
        CSSNumericLiteralValue::Create(parsed_value,
                                       CSSPrimitiveValue::UnitType::kNumber);
    CSSValueList* list = CSSValueList::CreateSpaceSeparated();
    list->Append(*MakeGarbageCollected<cssvalue::CSSCounterValue>(
        *identifier, numeric_literal_value, false));
    AddPropertyToPresentationAttributeStyle(style, CSSPropertyID::kCounterSet,
                                            *list);
  } else {
    HTMLElement::CollectStyleForPresentationAttribute(name, value, style);
  }
}

void HTMLLIElement::ParseAttribute(const AttributeModificationParams& params) {
  if (!RuntimeEnabledFeatures::CSSListCounterAccountingEnabled() &&
      params.name == html_names::kValueAttr) {
    if (ListItemOrdinal* ordinal = ListItemOrdinal::Get(*this))
      ParseValue(params.new_value, ordinal);
  } else {
    HTMLElement::ParseAttribute(params);
  }
}

void HTMLLIElement::AttachLayoutTree(AttachContext& context) {
  HTMLElement::AttachLayoutTree(context);
  if (RuntimeEnabledFeatures::CSSListCounterAccountingEnabled()) {
    return;
  }
  if (ListItemOrdinal* ordinal = ListItemOrdinal::Get(*this)) {
    ParseValue(FastGetAttribute(html_names::kValueAttr), ordinal);
  }
}

void HTMLLIElement::ParseValue(const AtomicString& value,
                               ListItemOrdinal* ordinal) {
  DCHECK(!RuntimeEnabledFeatures::CSSListCounterAccountingEnabled());
  DCHECK(ListItemOrdinal::IsListItem(*this));

  int requested_value = 0;
  if (ParseHTMLInteger(value, requested_value))
    ordinal->SetExplicitValue(requested_value, *this);
  else
    ordinal->ClearExplicitValue(*this);
}

}  // namespace blink