blob: cb2d20c9741ca3d041b1da3455d8447487352f79 [file] [log] [blame]
// 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 "core/fpdfdoc/cpdf_linklist.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "third_party/base/numerics/safe_conversions.h"
CPDF_LinkList::CPDF_LinkList() = default;
CPDF_LinkList::~CPDF_LinkList() = default;
CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage,
const CFX_PointF& point,
int* z_order) {
const std::vector<RetainPtr<CPDF_Dictionary>>* pPageLinkList =
GetPageLinks(pPage);
if (!pPageLinkList)
return CPDF_Link();
for (size_t i = pPageLinkList->size(); i > 0; --i) {
size_t annot_index = i - 1;
CPDF_Dictionary* pAnnot = (*pPageLinkList)[annot_index].Get();
if (!pAnnot)
continue;
CPDF_Link link(pAnnot);
if (!link.GetRect().Contains(point))
continue;
if (z_order)
*z_order = pdfium::base::checked_cast<int32_t>(annot_index);
return link;
}
return CPDF_Link();
}
const std::vector<RetainPtr<CPDF_Dictionary>>* CPDF_LinkList::GetPageLinks(
CPDF_Page* pPage) {
uint32_t objnum = pPage->GetDict()->GetObjNum();
if (objnum == 0)
return nullptr;
auto it = m_PageMap.find(objnum);
if (it != m_PageMap.end())
return &it->second;
// std::map::operator[] forces the creation of a map entry.
auto* page_link_list = &m_PageMap[objnum];
RetainPtr<CPDF_Array> pAnnotList =
pPage->GetMutableDict()->GetMutableArrayFor("Annots");
if (!pAnnotList)
return page_link_list;
for (size_t i = 0; i < pAnnotList->size(); ++i) {
RetainPtr<CPDF_Dictionary> pAnnot = pAnnotList->GetMutableDictAt(i);
bool add_link = (pAnnot && pAnnot->GetByteStringFor("Subtype") == "Link");
// Add non-links as nullptrs to preserve z-order.
page_link_list->emplace_back(add_link ? pAnnot : nullptr);
}
return page_link_list;
}