// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "cobalt/cssom/css_grouping_rule.h"

#include "cobalt/cssom/css_rule_list.h"
#include "cobalt/cssom/css_style_sheet.h"

namespace cobalt {
namespace cssom {

CSSGroupingRule::CSSGroupingRule(
    const scoped_refptr<CSSRuleList>& css_rule_list)
    : css_rule_list_(css_rule_list) {
  DCHECK(css_rule_list_);
}

const scoped_refptr<CSSRuleList>& CSSGroupingRule::css_rules() {
  return css_rule_list_;
}

unsigned int CSSGroupingRule::InsertRule(const std::string& rule,
                                         unsigned int index) {
  return css_rules()->InsertRule(rule, index);
}

void CSSGroupingRule::SetIndex(int index) {
  int index_difference = index - this->index();
  CSSRule::SetIndex(index);

  // Update all of our child rules' indices so that they are consistently
  // indexed within the parent's rule indices.
  for (unsigned int i = 0; i < css_rule_list_->length(); ++i) {
    css_rule_list_->Item(i)->SetIndex(css_rule_list_->Item(i)->index() +
                                      index_difference);
  }
}

int CSSGroupingRule::IndexWidth() const { return css_rule_list_->length(); }

void CSSGroupingRule::set_css_rules(
    const scoped_refptr<CSSRuleList>& css_rule_list) {
  DCHECK(css_rule_list);
  if (css_rule_list == css_rule_list_) {
    return;
  }
  if (parent_style_sheet()) {
    css_rule_list->AttachToCSSStyleSheet(parent_style_sheet());
    bool rules_possibly_added_or_changed_or_removed =
        (css_rule_list->length() > 0) ||
        (css_rule_list_ && css_rule_list_->length() > 0);
    if (rules_possibly_added_or_changed_or_removed) {
      parent_style_sheet()->OnCSSMutation();
    }
  }
  css_rule_list_ = css_rule_list;
}

CSSGroupingRule::~CSSGroupingRule() {}

}  // namespace cssom
}  // namespace cobalt