// Copyright 2014 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/include/fpdfdoc/fpdf_doc.h" CPDF_LinkList::CPDF_LinkList() { } CPDF_LinkList::~CPDF_LinkList() { } const std::vector<CPDF_Dictionary*>* CPDF_LinkList::GetPageLinks( CPDF_Page* pPage) { FX_DWORD objnum = pPage->m_pFormDict->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, FX_FLOAT pdf_x, FX_FLOAT pdf_y, 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); CPDF_Rect rect = link.GetRect(); if (!rect.Contains(pdf_x, pdf_y)) 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->m_pFormDict->GetArrayBy("Annots"); if (!pAnnotList) return; for (FX_DWORD i = 0; i < pAnnotList->GetCount(); ++i) { CPDF_Dictionary* pAnnot = pAnnotList->GetDictAt(i); bool add_link = (pAnnot && pAnnot->GetStringBy("Subtype") == "Link"); // Add non-links as nullptrs to preserve z-order. pList->push_back(add_link ? pAnnot : nullptr); } } CPDF_Rect CPDF_Link::GetRect() { return m_pDict->GetRectBy("Rect"); } CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc) { CPDF_Object* pDest = m_pDict->GetElementValue("Dest"); if (!pDest) return CPDF_Dest(); if (pDest->IsString() || pDest->IsName()) { CPDF_NameTree name_tree(pDoc, "Dests"); CFX_ByteStringC name = pDest->GetString(); return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name)); } if (CPDF_Array* pArray = pDest->AsArray()) return CPDF_Dest(pArray); return CPDF_Dest(); } CPDF_Action CPDF_Link::GetAction() { return CPDF_Action(m_pDict->GetDictBy("A")); }