// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfdoc/include/fpdf_doc.h"
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#include <vector>
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#include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
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CPDF_LinkList::CPDF_LinkList() {}
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CPDF_LinkList::~CPDF_LinkList() {}
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const std::vector<CPDF_Dictionary*>* CPDF_LinkList::GetPageLinks(
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CPDF_Page* pPage) {
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uint32_t objnum = pPage->m_pFormDict->GetObjNum();
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if (objnum == 0)
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return nullptr;
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auto it = m_PageMap.find(objnum);
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if (it != m_PageMap.end())
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return &it->second;
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// std::map::operator[] forces the creation of a map entry.
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std::vector<CPDF_Dictionary*>& page_link_list = m_PageMap[objnum];
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LoadPageLinks(pPage, &page_link_list);
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return &page_link_list;
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}
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CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage,
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FX_FLOAT pdf_x,
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FX_FLOAT pdf_y,
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int* z_order) {
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const std::vector<CPDF_Dictionary*>* pPageLinkList = GetPageLinks(pPage);
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if (!pPageLinkList)
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return CPDF_Link();
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for (size_t i = pPageLinkList->size(); i > 0; --i) {
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size_t annot_index = i - 1;
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CPDF_Dictionary* pAnnot = (*pPageLinkList)[annot_index];
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if (!pAnnot)
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continue;
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CPDF_Link link(pAnnot);
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CFX_FloatRect rect = link.GetRect();
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if (!rect.Contains(pdf_x, pdf_y))
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continue;
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if (z_order)
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*z_order = annot_index;
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return link;
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}
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return CPDF_Link();
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}
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void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage,
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std::vector<CPDF_Dictionary*>* pList) {
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CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArrayBy("Annots");
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if (!pAnnotList)
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return;
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for (size_t i = 0; i < pAnnotList->GetCount(); ++i) {
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CPDF_Dictionary* pAnnot = pAnnotList->GetDictAt(i);
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bool add_link = (pAnnot && pAnnot->GetStringBy("Subtype") == "Link");
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// Add non-links as nullptrs to preserve z-order.
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pList->push_back(add_link ? pAnnot : nullptr);
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}
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}
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CFX_FloatRect CPDF_Link::GetRect() {
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return m_pDict->GetRectBy("Rect");
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}
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CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc) {
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CPDF_Object* pDest = m_pDict->GetDirectObjectBy("Dest");
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if (!pDest)
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return CPDF_Dest();
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if (pDest->IsString() || pDest->IsName()) {
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CPDF_NameTree name_tree(pDoc, "Dests");
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return CPDF_Dest(name_tree.LookupNamedDest(pDoc, pDest->GetString()));
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}
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if (CPDF_Array* pArray = pDest->AsArray())
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return CPDF_Dest(pArray);
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return CPDF_Dest();
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}
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CPDF_Action CPDF_Link::GetAction() {
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return CPDF_Action(m_pDict->GetDictBy("A"));
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}
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