cpdf_bookmarktree.cpp

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// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
#include "core/fpdfdoc/cpdf_bookmarktree.h"
 
#include <utility>
 
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
 
CPDF_BookmarkTree::CPDF_BookmarkTree(const CPDF_Document* doc)
    : document_(doc) {}
 
CPDF_BookmarkTree::~CPDF_BookmarkTree() = default;
 
CPDF_Bookmark CPDF_BookmarkTree::GetFirstChild(
    const CPDF_Bookmark& parent) const {
  const CPDF_Dictionary* parent_dict = parent.GetDict();
  if (parent_dict)
    return CPDF_Bookmark(parent_dict->GetDictFor("First"));
 
  const CPDF_Dictionary* root = document_->GetRoot();
  if (!root)
    return CPDF_Bookmark();
 
  RetainPtr<const CPDF_Dictionary> outlines = root->GetDictFor("Outlines");
  return outlines ? CPDF_Bookmark(outlines->GetDictFor("First"))
                  : CPDF_Bookmark();
}
 
CPDF_Bookmark CPDF_BookmarkTree::GetNextSibling(
    const CPDF_Bookmark& bookmark) const {
  const CPDF_Dictionary* dict = bookmark.GetDict();
  if (!dict)
    return CPDF_Bookmark();
 
  RetainPtr<const CPDF_Dictionary> next = dict->GetDictFor("Next");
  return next != dict ? CPDF_Bookmark(std::move(next)) : CPDF_Bookmark();
}