1 // Copyright 2016 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/fpdfdoc/cpdf_dest.h"
8
9 #include "core/fpdfapi/parser/cpdf_array.h"
10 #include "core/fpdfapi/parser/cpdf_document.h"
11 #include "core/fpdfapi/parser/cpdf_name.h"
12 #include "core/fpdfapi/parser/cpdf_number.h"
13
14 namespace {
15
16 const FX_CHAR* const g_sZoomModes[] = {"XYZ", "Fit", "FitH", "FitV", "FitR",
17 "FitB", "FitBH", "FitBV", nullptr};
18
19 } // namespace
20
GetPageIndex(CPDF_Document * pDoc)21 int CPDF_Dest::GetPageIndex(CPDF_Document* pDoc) {
22 CPDF_Array* pArray = ToArray(m_pObj);
23 if (!pArray)
24 return 0;
25
26 CPDF_Object* pPage = pArray->GetDirectObjectAt(0);
27 if (!pPage)
28 return 0;
29 if (pPage->IsNumber())
30 return pPage->GetInteger();
31 if (!pPage->IsDictionary())
32 return 0;
33 return pDoc->GetPageIndex(pPage->GetObjNum());
34 }
35
GetPageObjNum()36 uint32_t CPDF_Dest::GetPageObjNum() {
37 CPDF_Array* pArray = ToArray(m_pObj);
38 if (!pArray)
39 return 0;
40
41 CPDF_Object* pPage = pArray->GetDirectObjectAt(0);
42 if (!pPage)
43 return 0;
44 if (pPage->IsNumber())
45 return pPage->GetInteger();
46 if (pPage->IsDictionary())
47 return pPage->GetObjNum();
48 return 0;
49 }
50
GetZoomMode()51 int CPDF_Dest::GetZoomMode() {
52 CPDF_Array* pArray = ToArray(m_pObj);
53 if (!pArray)
54 return 0;
55
56 CPDF_Object* pObj = pArray->GetDirectObjectAt(1);
57 if (!pObj)
58 return 0;
59
60 CFX_ByteString mode = pObj->GetString();
61 for (int i = 0; g_sZoomModes[i]; ++i) {
62 if (mode == g_sZoomModes[i])
63 return i + 1;
64 }
65
66 return 0;
67 }
68
GetXYZ(bool * pHasX,bool * pHasY,bool * pHasZoom,float * pX,float * pY,float * pZoom) const69 bool CPDF_Dest::GetXYZ(bool* pHasX,
70 bool* pHasY,
71 bool* pHasZoom,
72 float* pX,
73 float* pY,
74 float* pZoom) const {
75 *pHasX = false;
76 *pHasY = false;
77 *pHasZoom = false;
78
79 CPDF_Array* pArray = ToArray(m_pObj);
80 if (!pArray)
81 return false;
82
83 if (pArray->GetCount() < 5)
84 return false;
85
86 const CPDF_Name* xyz = ToName(pArray->GetDirectObjectAt(1));
87 if (!xyz || xyz->GetString() != "XYZ")
88 return false;
89
90 const CPDF_Number* numX = ToNumber(pArray->GetDirectObjectAt(2));
91 const CPDF_Number* numY = ToNumber(pArray->GetDirectObjectAt(3));
92 const CPDF_Number* numZoom = ToNumber(pArray->GetDirectObjectAt(4));
93
94 // If the value is a CPDF_Null then ToNumber will return nullptr.
95 *pHasX = !!numX;
96 *pHasY = !!numY;
97 *pHasZoom = !!numZoom;
98
99 if (numX)
100 *pX = numX->GetNumber();
101 if (numY)
102 *pY = numY->GetNumber();
103
104 // A zoom value of 0 is equivalent to a null value, so treat it as a null.
105 if (numZoom) {
106 float num = numZoom->GetNumber();
107 if (num == 0.0)
108 *pHasZoom = false;
109 else
110 *pZoom = num;
111 }
112
113 return true;
114 }
115
GetParam(int index)116 FX_FLOAT CPDF_Dest::GetParam(int index) {
117 CPDF_Array* pArray = ToArray(m_pObj);
118 return pArray ? pArray->GetNumberAt(2 + index) : 0;
119 }
120
GetRemoteName()121 CFX_ByteString CPDF_Dest::GetRemoteName() {
122 return m_pObj ? m_pObj->GetString() : CFX_ByteString();
123 }
124