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 "../../include/fpdfdoc/fpdf_doc.h"
8CPDF_LinkList::~CPDF_LinkList()
9{
10    FX_POSITION pos = m_PageMap.GetStartPosition();
11    while (pos) {
12        FX_LPVOID key, value;
13        m_PageMap.GetNextAssoc(pos, key, value);
14        delete (CFX_PtrArray*)value;
15    }
16}
17CFX_PtrArray* CPDF_LinkList::GetPageLinks(CPDF_Page* pPage)
18{
19    FX_DWORD objnum = pPage->m_pFormDict->GetObjNum();
20    if (objnum == 0) {
21        return NULL;
22    }
23    CFX_PtrArray* pPageLinkList = NULL;
24    if (!m_PageMap.Lookup((FX_LPVOID)(FX_UINTPTR)objnum, (FX_LPVOID&)pPageLinkList)) {
25        pPageLinkList = FX_NEW CFX_PtrArray;
26        if (pPageLinkList == NULL) {
27            return NULL;
28        }
29        m_PageMap.SetAt((FX_LPVOID)(FX_UINTPTR)objnum, pPageLinkList);
30        LoadPageLinks(pPage, pPageLinkList);
31    }
32    return pPageLinkList;
33}
34int CPDF_LinkList::CountLinks(CPDF_Page* pPage)
35{
36    CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
37    if (pPageLinkList == NULL) {
38        return 0;
39    }
40    return pPageLinkList->GetSize();
41}
42CPDF_Link CPDF_LinkList::GetLink(CPDF_Page* pPage, int index)
43{
44    CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
45    if (pPageLinkList == NULL) {
46        return NULL;
47    }
48    return (CPDF_Dictionary*)pPageLinkList->GetAt(index);
49}
50CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage, FX_FLOAT pdf_x, FX_FLOAT pdf_y)
51{
52    CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
53    if (pPageLinkList == NULL) {
54        return NULL;
55    }
56    int size = pPageLinkList->GetSize();
57    for (int i = 0; i < size; i ++) {
58        CPDF_Link Link = (CPDF_Dictionary*)pPageLinkList->GetAt(i);
59        CPDF_Rect rect = Link.GetRect();
60        if (rect.Contains(pdf_x, pdf_y)) {
61            return Link;
62        }
63    }
64    return NULL;
65}
66void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage, CFX_PtrArray* pList)
67{
68    CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArray("Annots");
69    if (pAnnotList == NULL) {
70        return;
71    }
72    for (FX_DWORD i = 0; i < pAnnotList->GetCount(); i ++) {
73        CPDF_Dictionary* pAnnot = pAnnotList->GetDict(i);
74        if (pAnnot == NULL) {
75            continue;
76        }
77        if (pAnnot->GetString("Subtype") != "Link") {
78            continue;
79        }
80        pList->Add(pAnnot);
81    }
82}
83CPDF_Rect CPDF_Link::GetRect()
84{
85    return m_pDict->GetRect("Rect");
86}
87CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc)
88{
89    CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
90    if (pDest == NULL) {
91        return NULL;
92    }
93    if (pDest->GetType() == PDFOBJ_STRING || pDest->GetType() == PDFOBJ_NAME) {
94        CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
95        CFX_ByteStringC name = pDest->GetString();
96        return name_tree.LookupNamedDest(pDoc, name);
97    } else if (pDest->GetType() == PDFOBJ_ARRAY) {
98        return (CPDF_Array*)pDest;
99    }
100    return NULL;
101}
102CPDF_Action CPDF_Link::GetAction()
103{
104    return m_pDict->GetDict("A");
105}
106