1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/include/fpdfdoc/fpdf_doc.h"
8
CPDF_LinkList()9 CPDF_LinkList::CPDF_LinkList() {
10 }
11
~CPDF_LinkList()12 CPDF_LinkList::~CPDF_LinkList() {
13 }
14
GetPageLinks(CPDF_Page * pPage)15 const std::vector<CPDF_Dictionary*>* CPDF_LinkList::GetPageLinks(
16 CPDF_Page* pPage) {
17 FX_DWORD objnum = pPage->m_pFormDict->GetObjNum();
18 if (objnum == 0)
19 return nullptr;
20
21 auto it = m_PageMap.find(objnum);
22 if (it != m_PageMap.end())
23 return &it->second;
24
25 // std::map::operator[] forces the creation of a map entry.
26 std::vector<CPDF_Dictionary*>& page_link_list = m_PageMap[objnum];
27 LoadPageLinks(pPage, &page_link_list);
28 return &page_link_list;
29 }
30
GetLinkAtPoint(CPDF_Page * pPage,FX_FLOAT pdf_x,FX_FLOAT pdf_y,int * z_order)31 CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage,
32 FX_FLOAT pdf_x,
33 FX_FLOAT pdf_y,
34 int* z_order) {
35 const std::vector<CPDF_Dictionary*>* pPageLinkList = GetPageLinks(pPage);
36 if (!pPageLinkList)
37 return CPDF_Link();
38
39 for (size_t i = pPageLinkList->size(); i > 0; --i) {
40 size_t annot_index = i - 1;
41 CPDF_Dictionary* pAnnot = (*pPageLinkList)[annot_index];
42 if (!pAnnot)
43 continue;
44
45 CPDF_Link link(pAnnot);
46 CPDF_Rect rect = link.GetRect();
47 if (!rect.Contains(pdf_x, pdf_y))
48 continue;
49
50 if (z_order)
51 *z_order = annot_index;
52 return link;
53 }
54 return CPDF_Link();
55 }
56
LoadPageLinks(CPDF_Page * pPage,std::vector<CPDF_Dictionary * > * pList)57 void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage,
58 std::vector<CPDF_Dictionary*>* pList) {
59 CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArray("Annots");
60 if (!pAnnotList)
61 return;
62
63 for (FX_DWORD i = 0; i < pAnnotList->GetCount(); ++i) {
64 CPDF_Dictionary* pAnnot = pAnnotList->GetDict(i);
65 bool add_link = (pAnnot && pAnnot->GetString("Subtype") == "Link");
66 // Add non-links as nullptrs to preserve z-order.
67 pList->push_back(add_link ? pAnnot : nullptr);
68 }
69 }
70
GetRect()71 CPDF_Rect CPDF_Link::GetRect() {
72 return m_pDict->GetRect("Rect");
73 }
GetDest(CPDF_Document * pDoc)74 CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc) {
75 CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
76 if (!pDest)
77 return CPDF_Dest();
78
79 if (pDest->IsString() || pDest->IsName()) {
80 CPDF_NameTree name_tree(pDoc, "Dests");
81 CFX_ByteStringC name = pDest->GetString();
82 return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
83 }
84 if (CPDF_Array* pArray = pDest->AsArray())
85 return CPDF_Dest(pArray);
86 return CPDF_Dest();
87 }
GetAction()88 CPDF_Action CPDF_Link::GetAction() {
89 return CPDF_Action(m_pDict->GetDict("A"));
90 }
91