| // 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/include/cpdf_linklist.h" |
| |
| #include "core/fpdfapi/fpdf_page/include/cpdf_page.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h" |
| |
| CPDF_LinkList::CPDF_LinkList() {} |
| |
| CPDF_LinkList::~CPDF_LinkList() {} |
| |
| const std::vector<CPDF_Dictionary*>* CPDF_LinkList::GetPageLinks( |
| CPDF_Page* pPage) { |
| uint32_t 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); |
| CFX_FloatRect 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 (size_t 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); |
| } |
| } |