1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// 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/cpdf_dest.h"
#include <algorithm>
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_number.h"
namespace {
// These arrays are indexed by the PDFDEST_VIEW_* constants.
// Last element is a sentinel.
const char* const g_sZoomModes[] = {"Unknown", "XYZ", "Fit", "FitH",
"FitV", "FitR", "FitB", "FitBH",
"FitBV", nullptr};
const uint8_t g_sZoomModeMaxParamCount[] = {0, 3, 0, 1, 1, 4, 0, 1, 1, 0};
static_assert(FX_ArraySize(g_sZoomModes) ==
FX_ArraySize(g_sZoomModeMaxParamCount),
"Zoom mode count Mismatch");
} // namespace
CPDF_Dest::CPDF_Dest() {}
CPDF_Dest::CPDF_Dest(const CPDF_Dest& that) = default;
CPDF_Dest::CPDF_Dest(const CPDF_Array* pObj) : m_pObj(pObj) {}
CPDF_Dest::~CPDF_Dest() {}
int CPDF_Dest::GetDestPageIndex(CPDF_Document* pDoc) const {
const CPDF_Array* pArray = ToArray(m_pObj.Get());
if (!pArray)
return -1;
const CPDF_Object* pPage = pArray->GetDirectObjectAt(0);
if (!pPage)
return -1;
if (pPage->IsNumber())
return pPage->GetInteger();
if (!pPage->IsDictionary())
return -1;
return pDoc->GetPageIndex(pPage->GetObjNum());
}
uint32_t CPDF_Dest::GetPageObjNum() const {
const CPDF_Array* pArray = ToArray(m_pObj.Get());
if (!pArray)
return 0;
const CPDF_Object* pPage = pArray->GetDirectObjectAt(0);
if (!pPage)
return 0;
if (pPage->IsNumber())
return pPage->GetInteger();
if (pPage->IsDictionary())
return pPage->GetObjNum();
return 0;
}
int CPDF_Dest::GetZoomMode() const {
const CPDF_Array* pArray = ToArray(m_pObj.Get());
if (!pArray)
return 0;
const CPDF_Object* pObj = pArray->GetDirectObjectAt(1);
if (!pObj)
return 0;
ByteString mode = pObj->GetString();
for (int i = 1; g_sZoomModes[i]; ++i) {
if (mode == g_sZoomModes[i])
return i;
}
return 0;
}
bool CPDF_Dest::GetXYZ(bool* pHasX,
bool* pHasY,
bool* pHasZoom,
float* pX,
float* pY,
float* pZoom) const {
*pHasX = false;
*pHasY = false;
*pHasZoom = false;
const CPDF_Array* pArray = ToArray(m_pObj.Get());
if (!pArray)
return false;
if (pArray->GetCount() < 5)
return false;
const CPDF_Name* xyz = ToName(pArray->GetDirectObjectAt(1));
if (!xyz || xyz->GetString() != "XYZ")
return false;
const CPDF_Number* numX = ToNumber(pArray->GetDirectObjectAt(2));
const CPDF_Number* numY = ToNumber(pArray->GetDirectObjectAt(3));
const CPDF_Number* numZoom = ToNumber(pArray->GetDirectObjectAt(4));
// If the value is a CPDF_Null then ToNumber will return nullptr.
*pHasX = !!numX;
*pHasY = !!numY;
*pHasZoom = !!numZoom;
if (numX)
*pX = numX->GetNumber();
if (numY)
*pY = numY->GetNumber();
// A zoom value of 0 is equivalent to a null value, so treat it as a null.
if (numZoom) {
float num = numZoom->GetNumber();
if (num == 0.0)
*pHasZoom = false;
else
*pZoom = num;
}
return true;
}
unsigned long CPDF_Dest::GetNumParams() const {
const CPDF_Array* pArray = ToArray(m_pObj.Get());
if (!pArray || pArray->GetCount() < 2)
return 0;
unsigned long maxParamsForFitType = g_sZoomModeMaxParamCount[GetZoomMode()];
unsigned long numParamsInArray = pArray->GetCount() - 2;
return std::min(maxParamsForFitType, numParamsInArray);
}
float CPDF_Dest::GetParam(int index) const {
const CPDF_Array* pArray = ToArray(m_pObj.Get());
return pArray ? pArray->GetNumberAt(2 + index) : 0;
}
ByteString CPDF_Dest::GetRemoteName() const {
return m_pObj ? m_pObj->GetString() : ByteString();
}
|
