Use observed pointers in CPDFSDK_AnnotIterator.

fpdfsdk/cpdfsdk_annotiterator.cpp

-// Copyright 2016 PDFium Authors. All rights reserved.
-// 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 "fpdfsdk/cpdfsdk_annotiterator.h"
-
-#include <algorithm>
-
-#include "fpdfsdk/cpdfsdk_annot.h"
-#include "fpdfsdk/cpdfsdk_pageview.h"
-
-CPDFSDK_AnnotIterator::CPDFSDK_AnnotIterator(CPDFSDK_PageView* pPageView,
-                                             bool bReverse)
-    : m_bReverse(bReverse), m_pos(0) {
-  const std::vector<CPDFSDK_Annot*>& annots = pPageView->GetAnnotList();
-  m_iteratorAnnotList.insert(m_iteratorAnnotList.begin(), annots.rbegin(),
-                             annots.rend());
-  std::stable_sort(m_iteratorAnnotList.begin(), m_iteratorAnnotList.end(),
-                   [](CPDFSDK_Annot* p1, CPDFSDK_Annot* p2) {
-                     return p1->GetLayoutOrder() < p2->GetLayoutOrder();
-                   });
-
-  CPDFSDK_Annot* pTopMostAnnot = pPageView->GetFocusAnnot();
-  if (!pTopMostAnnot)
-    return;
-
-  auto it = std::find(m_iteratorAnnotList.begin(), m_iteratorAnnotList.end(),
-                      pTopMostAnnot);
-  if (it != m_iteratorAnnotList.end()) {
-    CPDFSDK_Annot* pReaderAnnot = *it;
-    m_iteratorAnnotList.erase(it);
-    m_iteratorAnnotList.insert(m_iteratorAnnotList.begin(), pReaderAnnot);
-  }
-}
-
-CPDFSDK_AnnotIterator::~CPDFSDK_AnnotIterator() {}
-
-CPDFSDK_Annot* CPDFSDK_AnnotIterator::NextAnnot() {
-  if (m_pos < m_iteratorAnnotList.size())
-    return m_iteratorAnnotList[m_pos++];
-  return nullptr;
-}
-
-CPDFSDK_Annot* CPDFSDK_AnnotIterator::PrevAnnot() {
-  if (m_pos < m_iteratorAnnotList.size())
-    return m_iteratorAnnotList[m_iteratorAnnotList.size() - ++m_pos];
-  return nullptr;
-}
-
-CPDFSDK_Annot* CPDFSDK_AnnotIterator::Next() {
-  return m_bReverse ? PrevAnnot() : NextAnnot();
-}