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      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"
      8 #include "../../src/fxcrt/fx_safe_types.h"
      9 
     10 CPDF_LinkList::~CPDF_LinkList()
     11 {
     12     FX_POSITION pos = m_PageMap.GetStartPosition();
     13     while (pos) {
     14         FX_LPVOID key, value;
     15         m_PageMap.GetNextAssoc(pos, key, value);
     16         delete (CFX_PtrArray*)value;
     17     }
     18 }
     19 CFX_PtrArray* CPDF_LinkList::GetPageLinks(CPDF_Page* pPage)
     20 {
     21     FX_DWORD objnum = pPage->m_pFormDict->GetObjNum();
     22     if (objnum == 0) {
     23         return NULL;
     24     }
     25     CFX_PtrArray* pPageLinkList = NULL;
     26     if (!m_PageMap.Lookup((FX_LPVOID)(FX_UINTPTR)objnum, (FX_LPVOID&)pPageLinkList)) {
     27         pPageLinkList = new CFX_PtrArray;
     28         m_PageMap.SetAt((FX_LPVOID)(FX_UINTPTR)objnum, pPageLinkList);
     29         LoadPageLinks(pPage, pPageLinkList);
     30     }
     31     return pPageLinkList;
     32 }
     33 int CPDF_LinkList::CountLinks(CPDF_Page* pPage)
     34 {
     35     CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
     36     if (pPageLinkList == NULL) {
     37         return 0;
     38     }
     39     return pPageLinkList->GetSize();
     40 }
     41 CPDF_Link CPDF_LinkList::GetLink(CPDF_Page* pPage, int index)
     42 {
     43     CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
     44     if (!pPageLinkList) {
     45         return CPDF_Link();
     46     }
     47     return CPDF_Link((CPDF_Dictionary*)pPageLinkList->GetAt(index));
     48 }
     49 CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage, FX_FLOAT pdf_x, FX_FLOAT pdf_y)
     50 {
     51     CFX_PtrArray* pPageLinkList = GetPageLinks(pPage);
     52     if (!pPageLinkList) {
     53         return CPDF_Link();
     54     }
     55     int size = pPageLinkList->GetSize();
     56     for (int i = size - 1; i >= 0; --i) {
     57         CPDF_Link link((CPDF_Dictionary*)pPageLinkList->GetAt(i));
     58         CPDF_Rect rect = link.GetRect();
     59         if (rect.Contains(pdf_x, pdf_y)) {
     60             return link;
     61         }
     62     }
     63     return CPDF_Link();
     64 }
     65 void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage, CFX_PtrArray* pList)
     66 {
     67     CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArray("Annots");
     68     if (pAnnotList == NULL) {
     69         return;
     70     }
     71     for (FX_DWORD i = 0; i < pAnnotList->GetCount(); i ++) {
     72         CPDF_Dictionary* pAnnot = pAnnotList->GetDict(i);
     73         if (pAnnot == NULL) {
     74             continue;
     75         }
     76         if (pAnnot->GetString("Subtype") != "Link") {
     77             continue;
     78         }
     79         pList->Add(pAnnot);
     80     }
     81 }
     82 CPDF_Rect CPDF_Link::GetRect()
     83 {
     84     return m_pDict->GetRect("Rect");
     85 }
     86 CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc)
     87 {
     88     CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
     89     if (pDest == NULL) {
     90         return CPDF_Dest();
     91     }
     92     if (pDest->GetType() == PDFOBJ_STRING || pDest->GetType() == PDFOBJ_NAME) {
     93         CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
     94         CFX_ByteStringC name = pDest->GetString();
     95         return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
     96     }
     97     if (pDest->GetType() == PDFOBJ_ARRAY) {
     98         return CPDF_Dest((CPDF_Array*)pDest);
     99     }
    100     return CPDF_Dest();
    101 }
    102 CPDF_Action CPDF_Link::GetAction()
    103 {
    104     return CPDF_Action(m_pDict->GetDict("A"));
    105 }
    106