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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/fpdfapi/page/cpdf_textstate.h"
8 
9 #include "core/fpdfapi/font/cpdf_font.h"
10 #include "core/fpdfapi/page/cpdf_docpagedata.h"
11 #include "core/fpdfapi/parser/cpdf_document.h"
12 
CPDF_TextState()13 CPDF_TextState::CPDF_TextState() {}
~CPDF_TextState()14 CPDF_TextState::~CPDF_TextState() {}
15 
Emplace()16 void CPDF_TextState::Emplace() {
17   m_Ref.Emplace();
18 }
19 
GetFont() const20 CPDF_Font* CPDF_TextState::GetFont() const {
21   return m_Ref.GetObject()->m_pFont;
22 }
23 
SetFont(CPDF_Font * pFont)24 void CPDF_TextState::SetFont(CPDF_Font* pFont) {
25   m_Ref.GetPrivateCopy()->SetFont(pFont);
26 }
27 
GetFontSize() const28 float CPDF_TextState::GetFontSize() const {
29   return m_Ref.GetObject()->m_FontSize;
30 }
31 
SetFontSize(float size)32 void CPDF_TextState::SetFontSize(float size) {
33   m_Ref.GetPrivateCopy()->m_FontSize = size;
34 }
35 
GetMatrix() const36 const float* CPDF_TextState::GetMatrix() const {
37   return m_Ref.GetObject()->m_Matrix;
38 }
39 
GetMutableMatrix()40 float* CPDF_TextState::GetMutableMatrix() {
41   return m_Ref.GetPrivateCopy()->m_Matrix;
42 }
43 
GetCharSpace() const44 float CPDF_TextState::GetCharSpace() const {
45   return m_Ref.GetObject()->m_CharSpace;
46 }
47 
SetCharSpace(float sp)48 void CPDF_TextState::SetCharSpace(float sp) {
49   m_Ref.GetPrivateCopy()->m_CharSpace = sp;
50 }
51 
GetWordSpace() const52 float CPDF_TextState::GetWordSpace() const {
53   return m_Ref.GetObject()->m_WordSpace;
54 }
55 
SetWordSpace(float sp)56 void CPDF_TextState::SetWordSpace(float sp) {
57   m_Ref.GetPrivateCopy()->m_WordSpace = sp;
58 }
59 
GetFontSizeV() const60 float CPDF_TextState::GetFontSizeV() const {
61   return m_Ref.GetObject()->GetFontSizeV();
62 }
63 
GetFontSizeH() const64 float CPDF_TextState::GetFontSizeH() const {
65   return m_Ref.GetObject()->GetFontSizeH();
66 }
67 
GetBaselineAngle() const68 float CPDF_TextState::GetBaselineAngle() const {
69   return m_Ref.GetObject()->GetBaselineAngle();
70 }
71 
GetShearAngle() const72 float CPDF_TextState::GetShearAngle() const {
73   return m_Ref.GetObject()->GetShearAngle();
74 }
75 
GetTextMode() const76 TextRenderingMode CPDF_TextState::GetTextMode() const {
77   return m_Ref.GetObject()->m_TextMode;
78 }
79 
SetTextMode(TextRenderingMode mode)80 void CPDF_TextState::SetTextMode(TextRenderingMode mode) {
81   m_Ref.GetPrivateCopy()->m_TextMode = mode;
82 }
83 
GetCTM() const84 const float* CPDF_TextState::GetCTM() const {
85   return m_Ref.GetObject()->m_CTM;
86 }
87 
GetMutableCTM()88 float* CPDF_TextState::GetMutableCTM() {
89   return m_Ref.GetPrivateCopy()->m_CTM;
90 }
91 
TextData()92 CPDF_TextState::TextData::TextData()
93     : m_pFont(nullptr),
94       m_pDocument(nullptr),
95       m_FontSize(1.0f),
96       m_CharSpace(0),
97       m_WordSpace(0),
98       m_TextMode(TextRenderingMode::MODE_FILL) {
99   m_Matrix[0] = m_Matrix[3] = 1.0f;
100   m_Matrix[1] = m_Matrix[2] = 0;
101   m_CTM[0] = m_CTM[3] = 1.0f;
102   m_CTM[1] = m_CTM[2] = 0;
103 }
104 
TextData(const TextData & that)105 CPDF_TextState::TextData::TextData(const TextData& that)
106     : m_pFont(that.m_pFont),
107       m_pDocument(that.m_pDocument),
108       m_FontSize(that.m_FontSize),
109       m_CharSpace(that.m_CharSpace),
110       m_WordSpace(that.m_WordSpace),
111       m_TextMode(that.m_TextMode) {
112   for (int i = 0; i < 4; ++i)
113     m_Matrix[i] = that.m_Matrix[i];
114 
115   for (int i = 0; i < 4; ++i)
116     m_CTM[i] = that.m_CTM[i];
117 
118   if (m_pDocument && m_pFont)
119     m_pFont = m_pDocument->GetPageData()->GetFont(m_pFont->GetFontDict());
120 }
121 
~TextData()122 CPDF_TextState::TextData::~TextData() {
123   ReleaseFont();
124 }
125 
SetFont(CPDF_Font * pFont)126 void CPDF_TextState::TextData::SetFont(CPDF_Font* pFont) {
127   ReleaseFont();
128   m_pDocument = pFont ? pFont->GetDocument() : nullptr;
129   m_pFont = pFont;
130 }
131 
GetFontSizeV() const132 float CPDF_TextState::TextData::GetFontSizeV() const {
133   return fabs(FXSYS_sqrt2(m_Matrix[1], m_Matrix[3]) * m_FontSize);
134 }
135 
GetFontSizeH() const136 float CPDF_TextState::TextData::GetFontSizeH() const {
137   return fabs(FXSYS_sqrt2(m_Matrix[0], m_Matrix[2]) * m_FontSize);
138 }
139 
GetBaselineAngle() const140 float CPDF_TextState::TextData::GetBaselineAngle() const {
141   return atan2(m_Matrix[2], m_Matrix[0]);
142 }
143 
GetShearAngle() const144 float CPDF_TextState::TextData::GetShearAngle() const {
145   return GetBaselineAngle() + atan2(m_Matrix[1], m_Matrix[3]);
146 }
147 
ReleaseFont()148 void CPDF_TextState::TextData::ReleaseFont() {
149   if (!m_pDocument || !m_pFont)
150     return;
151 
152   CPDF_DocPageData* pPageData = m_pDocument->GetPageData();
153   if (pPageData && !pPageData->IsForceClear())
154     pPageData->ReleaseFont(m_pFont->GetFontDict());
155 }
156 
SetTextRenderingModeFromInt(int iMode,TextRenderingMode * mode)157 bool SetTextRenderingModeFromInt(int iMode, TextRenderingMode* mode) {
158   if (iMode < 0 || iMode > 7)
159     return false;
160   *mode = static_cast<TextRenderingMode>(iMode);
161   return true;
162 }
163 
TextRenderingModeIsClipMode(const TextRenderingMode & mode)164 bool TextRenderingModeIsClipMode(const TextRenderingMode& mode) {
165   switch (mode) {
166     case TextRenderingMode::MODE_FILL_CLIP:
167     case TextRenderingMode::MODE_STROKE_CLIP:
168     case TextRenderingMode::MODE_FILL_STROKE_CLIP:
169     case TextRenderingMode::MODE_CLIP:
170       return true;
171     default:
172       return false;
173   }
174 }
175 
TextRenderingModeIsStrokeMode(const TextRenderingMode & mode)176 bool TextRenderingModeIsStrokeMode(const TextRenderingMode& mode) {
177   switch (mode) {
178     case TextRenderingMode::MODE_STROKE:
179     case TextRenderingMode::MODE_FILL_STROKE:
180     case TextRenderingMode::MODE_STROKE_CLIP:
181     case TextRenderingMode::MODE_FILL_STROKE_CLIP:
182       return true;
183     default:
184       return false;
185   }
186 }
187