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// 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"
CPDF_LinkList::CPDF_LinkList() = default;
CPDF_LinkList::~CPDF_LinkList() = default;
const std::vector<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.
std::vector<CPDF_Dictionary*>& page_link_list = m_PageMap[objnum];
LoadPageLinks(pPage, &page_link_list);
return &page_link_list;
}
CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage,
const CFX_PointF& point,
int* z_order) {
const std::vector<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];
if (!pAnnot)
continue;
CPDF_Link link(pAnnot);
if (!link.GetRect().Contains(point))
continue;
if (z_order)
*z_order = annot_index;
return link;
}
return CPDF_Link();
}
void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage,
std::vector<CPDF_Dictionary*>* pList) {
CPDF_Array* pAnnotList = pPage->GetDict()->GetArrayFor("Annots");
if (!pAnnotList)
return;
for (size_t i = 0; i < pAnnotList->size(); ++i) {
CPDF_Dictionary* pAnnot = pAnnotList->GetDictAt(i);
bool add_link = (pAnnot && pAnnot->GetStringFor("Subtype") == "Link");
// Add non-links as nullptrs to preserve z-order.
pList->push_back(add_link ? pAnnot : nullptr);
}
}
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