Clean up IFX_BidiChar
- Replace IFX_BidiChar with just CFX_BidiChar
- Document implementation
- Change out parameters to pointers
- Remove dead code
- Add an enum for bidi directions
- Move several externs to a header
- Add unit tests
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1197643002 .
diff --git a/BUILD.gn b/BUILD.gn
index 3cc4618..d3c092e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -396,8 +396,8 @@
static_library("fxcrt") {
sources = [
- "core/include/fxcrt/fx_arb.h",
"core/include/fxcrt/fx_basic.h",
+ "core/include/fxcrt/fx_bidi.h",
"core/include/fxcrt/fx_coordinates.h",
"core/include/fxcrt/fx_ext.h",
"core/include/fxcrt/fx_memory.h",
@@ -408,8 +408,6 @@
"core/include/fxcrt/fx_ucd.h",
"core/include/fxcrt/fx_xml.h",
"core/src/fxcrt/extension.h",
- "core/src/fxcrt/fx_arabic.cpp",
- "core/src/fxcrt/fx_arabic.h",
"core/src/fxcrt/fx_basic_array.cpp",
"core/src/fxcrt/fx_basic_bstring.cpp",
"core/src/fxcrt/fx_basic_buffer.cpp",
@@ -422,6 +420,7 @@
"core/src/fxcrt/fx_basic_utf.cpp",
"core/src/fxcrt/fx_basic_util.cpp",
"core/src/fxcrt/fx_basic_wstring.cpp",
+ "core/src/fxcrt/fx_bidi.cpp",
"core/src/fxcrt/fx_extension.cpp",
"core/src/fxcrt/fx_ucddata.cpp",
"core/src/fxcrt/fx_unicode.cpp",
@@ -739,6 +738,7 @@
"core/src/fxcrt/fx_basic_bstring_unittest.cpp",
"core/src/fxcrt/fx_basic_memmgr_unittest.cpp",
"core/src/fxcrt/fx_basic_wstring_unittest.cpp",
+ "core/src/fxcrt/fx_bidi_unittest.cpp",
"core/src/fxcrt/fx_system_unittest.cpp",
"testing/fx_string_testhelpers.cpp",
"testing/fx_string_testhelpers.h",
diff --git a/core/include/fxcrt/fx_arb.h b/core/include/fxcrt/fx_arb.h
deleted file mode 100644
index 0f6de64..0000000
--- a/core/include/fxcrt/fx_arb.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2014 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
-
-#ifndef CORE_INCLUDE_FXCRT_FX_ARB_H_
-#define CORE_INCLUDE_FXCRT_FX_ARB_H_
-
-#include "fx_system.h"
-
-class IFX_BidiChar {
- public:
- static IFX_BidiChar* Create();
- virtual ~IFX_BidiChar() {}
-
- virtual void SetPolicy(FX_BOOL bSeparateNeutral = TRUE) = 0;
- virtual FX_BOOL AppendChar(FX_WCHAR wch) = 0;
- virtual FX_BOOL EndChar() = 0;
- virtual int32_t GetBidiInfo(int32_t& iStart, int32_t& iCount) = 0;
- virtual void Reset() = 0;
-};
-
-#endif // CORE_INCLUDE_FXCRT_FX_ARB_H_
diff --git a/core/include/fxcrt/fx_bidi.h b/core/include/fxcrt/fx_bidi.h
new file mode 100644
index 0000000..a55ce6c
--- /dev/null
+++ b/core/include/fxcrt/fx_bidi.h
@@ -0,0 +1,59 @@
+// Copyright 2014 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
+
+#ifndef CORE_INCLUDE_FXCRT_FX_BIDI_H_
+#define CORE_INCLUDE_FXCRT_FX_BIDI_H_
+
+#include "fx_system.h"
+
+// Processes characters and group them into segments based on text direction.
+class CFX_BidiChar {
+ public:
+ enum Direction { NEUTRAL, LEFT, RIGHT };
+
+ CFX_BidiChar();
+ ~CFX_BidiChar();
+
+ // Append a character and classify it as left, right, or neutral.
+ // Returns true if the character has a different direction than the
+ // existing direction to indicate there is a segment to process.
+ bool AppendChar(FX_WCHAR wch);
+
+ // Call this after the last character has been appended. AppendChar()
+ // must not be called after this.
+ // Returns true if there is still a segment to process.
+ bool EndChar();
+
+ // Get information about the segment to process.
+ // The segment's start position and character count is returned in |iStart|
+ // and |iCount|, respectively. Pass in null pointers if the information is
+ // not needed.
+ // Returns the segment direction.
+ Direction GetBidiInfo(int32_t* iStart, int32_t* iCount) const;
+
+ private:
+ void SaveCurrentStateToLastState();
+
+ // Position of the current segment.
+ int32_t m_iCurStart;
+
+ // Number of characters in the current segment.
+ int32_t m_iCurCount;
+
+ // Direction of the current segment.
+ Direction m_CurBidi;
+
+ // Number of characters in the last segment.
+ int32_t m_iLastStart;
+
+ // Number of characters in the last segment.
+ int32_t m_iLastCount;
+
+ // Direction of the last segment.
+ Direction m_LastBidi;
+};
+
+#endif // CORE_INCLUDE_FXCRT_FX_BIDI_H_
diff --git a/core/include/fxcrt/fx_ucd.h b/core/include/fxcrt/fx_ucd.h
index 8bc5930..62c2dfd 100644
--- a/core/include/fxcrt/fx_ucd.h
+++ b/core/include/fxcrt/fx_ucd.h
@@ -9,97 +9,41 @@
#include "fx_system.h"
-enum FX_CHARBREAKPROP {
- FX_CBP_OP = 0,
- FX_CBP_CL = 1,
- FX_CBP_QU = 2,
- FX_CBP_GL = 3,
- FX_CBP_NS = 4,
- FX_CBP_EX = 5,
- FX_CBP_SY = 6,
- FX_CBP_IS = 7,
- FX_CBP_PR = 8,
- FX_CBP_PO = 9,
- FX_CBP_NU = 10,
- FX_CBP_AL = 11,
- FX_CBP_ID = 12,
- FX_CBP_IN = 13,
- FX_CBP_HY = 14,
- FX_CBP_BA = 15,
- FX_CBP_BB = 16,
- FX_CBP_B2 = 17,
- FX_CBP_ZW = 18,
- FX_CBP_CM = 19,
- FX_CBP_WJ = 20,
- FX_CBP_H2 = 21,
- FX_CBP_H3 = 22,
- FX_CBP_JL = 23,
- FX_CBP_JV = 24,
- FX_CBP_JT = 25,
-
- FX_CBP_BK = 26,
- FX_CBP_CR = 27,
- FX_CBP_LF = 28,
- FX_CBP_NL = 29,
- FX_CBP_SA = 30,
- FX_CBP_SG = 31,
- FX_CBP_CB = 32,
- FX_CBP_XX = 33,
- FX_CBP_AI = 34,
- FX_CBP_SP = 35,
- FX_CBP_TB = 37,
- FX_CBP_NONE = 36,
-};
#define FX_BIDICLASSBITS 6
#define FX_BIDICLASSBITSMASK (31 << FX_BIDICLASSBITS)
enum FX_BIDICLASS {
- FX_BIDICLASS_ON = 0,
- FX_BIDICLASS_L = 1,
- FX_BIDICLASS_R = 2,
- FX_BIDICLASS_AN = 3,
- FX_BIDICLASS_EN = 4,
- FX_BIDICLASS_AL = 5,
- FX_BIDICLASS_NSM = 6,
- FX_BIDICLASS_CS = 7,
- FX_BIDICLASS_ES = 8,
- FX_BIDICLASS_ET = 9,
- FX_BIDICLASS_BN = 10,
- FX_BIDICLASS_S = 11,
- FX_BIDICLASS_WS = 12,
- FX_BIDICLASS_B = 13,
- FX_BIDICLASS_RLO = 14,
- FX_BIDICLASS_RLE = 15,
- FX_BIDICLASS_LRO = 16,
- FX_BIDICLASS_LRE = 17,
- FX_BIDICLASS_PDF = 18,
+ FX_BIDICLASS_ON = 0, // Other Neutral
+ FX_BIDICLASS_L = 1, // Left Letter
+ FX_BIDICLASS_R = 2, // Right Letter
+ FX_BIDICLASS_AN = 3, // Arabic Number
+ FX_BIDICLASS_EN = 4, // European Number
+ FX_BIDICLASS_AL = 5, // Arabic Letter
+ FX_BIDICLASS_NSM = 6, // Non-spacing Mark
+ FX_BIDICLASS_CS = 7, // Common Number Separator
+ FX_BIDICLASS_ES = 8, // European Separator
+ FX_BIDICLASS_ET = 9, // European Number Terminator
+ FX_BIDICLASS_BN = 10, // Boundary Neutral
+ FX_BIDICLASS_S = 11, // Segment Separator
+ FX_BIDICLASS_WS = 12, // Whitespace
+ FX_BIDICLASS_B = 13, // Paragraph Separator
+ FX_BIDICLASS_RLO = 14, // Right-to-Left Override
+ FX_BIDICLASS_RLE = 15, // Right-to-Left Embedding
+ FX_BIDICLASS_LRO = 16, // Left-to-Right Override
+ FX_BIDICLASS_LRE = 17, // Left-to-Right Embedding
+ FX_BIDICLASS_PDF = 18, // Pop Directional Format
FX_BIDICLASS_N = FX_BIDICLASS_ON,
};
-#define FX_CHARTYPEBITS 11
-#define FX_CHARTYPEBITSMASK (15 << FX_CHARTYPEBITS)
-enum FX_CHARTYPE {
- FX_CHARTYPE_Unknown = 0,
- FX_CHARTYPE_Tab = (1 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Space = (2 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Control = (3 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Combination = (4 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Numeric = (5 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Normal = (6 << FX_CHARTYPEBITS),
- FX_CHARTYPE_ArabicAlef = (7 << FX_CHARTYPEBITS),
- FX_CHARTYPE_ArabicSpecial = (8 << FX_CHARTYPEBITS),
- FX_CHARTYPE_ArabicDistortion = (9 << FX_CHARTYPEBITS),
- FX_CHARTYPE_ArabicNormal = (10 << FX_CHARTYPEBITS),
- FX_CHARTYPE_ArabicForm = (11 << FX_CHARTYPEBITS),
- FX_CHARTYPE_Arabic = (12 << FX_CHARTYPEBITS),
-};
+
+extern const FX_DWORD kTextLayoutCodeProperties[];
+extern const size_t kTextLayoutCodePropertiesSize;
+
+extern const FX_WCHAR kFXTextLayoutVerticalMirror[];
+extern const size_t kFXTextLayoutVerticalMirrorSize;
+
+extern const FX_WCHAR kFXTextLayoutBidiMirror[];
+extern const size_t kFXTextLayoutBidiMirrorSize;
+
FX_DWORD FX_GetUnicodeProperties(FX_WCHAR wch);
-FX_BOOL FX_IsCtrlCode(FX_WCHAR ch);
-FX_BOOL FX_IsRotationCode(FX_WCHAR ch);
-FX_BOOL FX_IsCombinationChar(FX_WCHAR wch);
-FX_BOOL FX_IsBidiChar(FX_WCHAR wch);
FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_BOOL bRTL, FX_BOOL bVertical);
-FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch,
- FX_DWORD dwProps,
- FX_BOOL bRTL,
- FX_BOOL bVertical);
#endif // CORE_INCLUDE_FXCRT_FX_UCD_H_
diff --git a/core/src/fpdftext/fpdf_text.cpp b/core/src/fpdftext/fpdf_text.cpp
index e7ca6c1..af944d9 100644
--- a/core/src/fpdftext/fpdf_text.cpp
+++ b/core/src/fpdftext/fpdf_text.cpp
@@ -9,7 +9,7 @@
#include "../../include/fpdfapi/fpdf_pageobj.h"
#include "../../include/fpdfapi/fpdf_resource.h"
#include "../../include/fpdftext/fpdf_text.h"
-#include "../../include/fxcrt/fx_arb.h"
+#include "../../include/fxcrt/fx_bidi.h"
#include "../../include/fxcrt/fx_ucd.h"
#include "text_int.h"
#include "txtproc.h"
@@ -321,35 +321,35 @@
return;
}
CFX_WideString sBuffer;
- nonstd::unique_ptr<IFX_BidiChar> pBidiChar(IFX_BidiChar::Create());
+ nonstd::unique_ptr<CFX_BidiChar> pBidiChar(new CFX_BidiChar);
CFX_WordArray order;
FX_BOOL bR2L = FALSE;
int32_t start = 0, count = 0, i = 0;
int nR2L = 0, nL2R = 0;
for (i = 0; i < str.GetLength(); i++) {
if (pBidiChar->AppendChar(str.GetAt(i))) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
order.Add(start);
order.Add(count);
order.Add(ret);
if (!bR2L) {
- if (ret == 2) {
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
}
}
if (pBidiChar->EndChar()) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
order.Add(start);
order.Add(count);
order.Add(ret);
if (!bR2L) {
- if (ret == 2) {
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
diff --git a/core/src/fpdftext/fpdf_text_int.cpp b/core/src/fpdftext/fpdf_text_int.cpp
index ce67344..462f136 100644
--- a/core/src/fpdftext/fpdf_text_int.cpp
+++ b/core/src/fpdftext/fpdf_text_int.cpp
@@ -13,7 +13,7 @@
#include "../../include/fpdfapi/fpdf_pageobj.h"
#include "../../include/fpdfapi/fpdf_resource.h"
#include "../../include/fpdftext/fpdf_text.h"
-#include "../../include/fxcrt/fx_arb.h"
+#include "../../include/fxcrt/fx_bidi.h"
#include "../../include/fxcrt/fx_ucd.h"
#include "text_int.h"
@@ -1020,10 +1020,10 @@
}
return w;
}
-void CPDF_TextPage::OnPiece(IFX_BidiChar* pBidi, CFX_WideString& str) {
+void CPDF_TextPage::OnPiece(CFX_BidiChar* pBidi, CFX_WideString& str) {
int32_t start, count;
- int32_t ret = pBidi->GetBidiInfo(start, count);
- if (ret == 2) {
+ CFX_BidiChar::Direction ret = pBidi->GetBidiInfo(&start, &count);
+ if (ret == CFX_BidiChar::RIGHT) {
for (int i = start + count - 1; i >= start; i--) {
m_TextBuf.AppendChar(str.GetAt(i));
m_charList.Add(*(PAGECHAR_INFO*)m_TempCharList.GetAt(i));
@@ -1104,7 +1104,7 @@
if (count1 <= 0) {
return;
}
- nonstd::unique_ptr<IFX_BidiChar> pBidiChar(IFX_BidiChar::Create());
+ nonstd::unique_ptr<CFX_BidiChar> pBidiChar(new CFX_BidiChar);
CFX_WideString str = m_TempTextBuf.GetWideString();
CFX_WordArray order;
FX_BOOL bR2L = FALSE;
@@ -1126,28 +1126,28 @@
bPrevSpace = FALSE;
}
if (pBidiChar->AppendChar(str.GetAt(i))) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
order.Add(start);
order.Add(count);
order.Add(ret);
if (!bR2L) {
- if (ret == 2) {
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
}
}
if (pBidiChar->EndChar()) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
order.Add(start);
order.Add(count);
order.Add(ret);
if (!bR2L) {
- if (ret == 2) {
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
@@ -1762,7 +1762,7 @@
FX_BOOL CPDF_TextPage::IsRightToLeft(const CPDF_TextObject* pTextObj,
const CPDF_Font* pFont,
int nItems) const {
- nonstd::unique_ptr<IFX_BidiChar> pBidiChar(IFX_BidiChar::Create());
+ nonstd::unique_ptr<CFX_BidiChar> pBidiChar(new CFX_BidiChar);
int32_t nR2L = 0;
int32_t nL2R = 0;
int32_t start = 0, count = 0;
@@ -1781,19 +1781,19 @@
continue;
}
if (pBidiChar->AppendChar(wChar)) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
- if (ret == 2) {
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
}
if (pBidiChar->EndChar()) {
- int32_t ret = pBidiChar->GetBidiInfo(start, count);
- if (ret == 2) {
+ CFX_BidiChar::Direction ret = pBidiChar->GetBidiInfo(&start, &count);
+ if (ret == CFX_BidiChar::RIGHT) {
nR2L++;
- } else if (ret == 1) {
+ } else if (ret == CFX_BidiChar::LEFT) {
nL2R++;
}
}
diff --git a/core/src/fpdftext/text_int.h b/core/src/fpdftext/text_int.h
index 091ee24..3f1023a 100644
--- a/core/src/fpdftext/text_int.h
+++ b/core/src/fpdftext/text_int.h
@@ -111,7 +111,7 @@
CPDF_TextObject* pTextObj2);
int GetCharWidth(FX_DWORD charCode, CPDF_Font* pFont) const;
void CloseTempLine();
- void OnPiece(IFX_BidiChar* pBidi, CFX_WideString& str);
+ void OnPiece(CFX_BidiChar* pBidi, CFX_WideString& str);
int32_t PreMarkedContent(PDFTEXT_Obj pObj);
void ProcessMarkedContent(PDFTEXT_Obj pObj);
void CheckMarkedContentObject(int32_t& start, int32_t& nCount) const;
diff --git a/core/src/fxcrt/fx_arabic.cpp b/core/src/fxcrt/fx_arabic.cpp
deleted file mode 100644
index 3b7d0c1..0000000
--- a/core/src/fxcrt/fx_arabic.cpp
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2014 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 "../../include/fxcrt/fx_ucd.h"
-#include "fx_arabic.h"
-
-extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536];
-IFX_BidiChar* IFX_BidiChar::Create() {
- return new CFX_BidiChar;
-}
-CFX_BidiChar::CFX_BidiChar()
- : m_bSeparateNeutral(TRUE),
- m_iCurStart(0),
- m_iCurCount(0),
- m_iCurBidi(0),
- m_iLastBidi(0),
- m_iLastStart(0),
- m_iLastCount(0) {}
-void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) {
- m_bSeparateNeutral = bSeparateNeutral;
-}
-
-FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) {
- FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
- int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
- int32_t iContext = 0;
- switch (iBidiCls) {
- case FX_BIDICLASS_L:
- case FX_BIDICLASS_AN:
- case FX_BIDICLASS_EN:
- iContext = 1;
- break;
- case FX_BIDICLASS_R:
- case FX_BIDICLASS_AL:
- iContext = 2;
- break;
- }
- FX_BOOL bRet = FALSE;
- if (iContext != m_iCurBidi) {
- if (m_bSeparateNeutral) {
- bRet = TRUE;
- } else {
- if (m_iCurBidi == 0) {
- bRet = (m_iCurCount > 0);
- } else {
- bRet = (iContext != 0);
- }
- }
- if (bRet) {
- m_iLastBidi = m_iCurBidi;
- m_iLastStart = m_iCurStart;
- m_iCurStart = m_iCurCount;
- m_iLastCount = m_iCurCount - m_iLastStart;
- }
- if (m_bSeparateNeutral || iContext != 0) {
- m_iCurBidi = iContext;
- }
- }
- m_iCurCount++;
- return bRet;
-}
-FX_BOOL CFX_BidiChar::EndChar() {
- m_iLastBidi = m_iCurBidi;
- m_iLastStart = m_iCurStart;
- m_iCurStart = m_iCurCount;
- m_iLastCount = m_iCurCount - m_iLastStart;
- return m_iLastCount > 0;
-}
-int32_t CFX_BidiChar::GetBidiInfo(int32_t& iStart, int32_t& iCount) {
- iStart = m_iLastStart;
- iCount = m_iLastCount;
- return m_iLastBidi;
-}
-void CFX_BidiChar::Reset() {
- m_iCurStart = 0;
- m_iCurCount = 0;
- m_iCurBidi = 0;
- m_iLastBidi = 0;
- m_iLastStart = 0;
- m_iLastCount = 0;
-}
diff --git a/core/src/fxcrt/fx_arabic.h b/core/src/fxcrt/fx_arabic.h
deleted file mode 100644
index 0230d40..0000000
--- a/core/src/fxcrt/fx_arabic.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2014 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
-
-#ifndef CORE_SRC_FXCRT_FX_ARABIC_H_
-#define CORE_SRC_FXCRT_FX_ARABIC_H_
-
-#include "../../include/fxcrt/fx_arb.h"
-
-class CFX_BidiChar final : public IFX_BidiChar {
- public:
- CFX_BidiChar();
- ~CFX_BidiChar() override {}
-
- void SetPolicy(FX_BOOL bSeparateNeutral = TRUE) override;
- FX_BOOL AppendChar(FX_WCHAR wch) override;
- FX_BOOL EndChar() override;
- int32_t GetBidiInfo(int32_t& iStart, int32_t& iCount) override;
- void Reset() override;
-
- private:
- FX_BOOL m_bSeparateNeutral;
- int32_t m_iCurStart;
- int32_t m_iCurCount;
- int32_t m_iCurBidi;
- int32_t m_iLastBidi;
- int32_t m_iLastStart;
- int32_t m_iLastCount;
-};
-
-#endif // CORE_SRC_FXCRT_FX_ARABIC_H_
diff --git a/core/src/fxcrt/fx_bidi.cpp b/core/src/fxcrt/fx_bidi.cpp
new file mode 100644
index 0000000..0310fa0
--- /dev/null
+++ b/core/src/fxcrt/fx_bidi.cpp
@@ -0,0 +1,66 @@
+// Copyright 2014 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 "../../include/fxcrt/fx_bidi.h"
+#include "../../include/fxcrt/fx_ucd.h"
+
+CFX_BidiChar::CFX_BidiChar()
+ : m_iCurStart(0),
+ m_iCurCount(0),
+ m_CurBidi(NEUTRAL),
+ m_iLastStart(0),
+ m_iLastCount(0),
+ m_LastBidi(NEUTRAL) {
+}
+
+CFX_BidiChar::~CFX_BidiChar() {
+}
+
+bool CFX_BidiChar::AppendChar(FX_WCHAR wch) {
+ FX_DWORD dwProps = FX_GetUnicodeProperties(wch);
+ int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
+ Direction bidi = NEUTRAL;
+ switch (iBidiCls) {
+ case FX_BIDICLASS_L:
+ case FX_BIDICLASS_AN:
+ case FX_BIDICLASS_EN:
+ bidi = LEFT;
+ break;
+ case FX_BIDICLASS_R:
+ case FX_BIDICLASS_AL:
+ bidi = RIGHT;
+ break;
+ }
+
+ bool bRet = (bidi != m_CurBidi);
+ if (bRet) {
+ SaveCurrentStateToLastState();
+ m_CurBidi = bidi;
+ }
+ m_iCurCount++;
+ return bRet;
+}
+
+bool CFX_BidiChar::EndChar() {
+ SaveCurrentStateToLastState();
+ return m_iLastCount > 0;
+}
+
+CFX_BidiChar::Direction CFX_BidiChar::GetBidiInfo(int32_t* iStart,
+ int32_t* iCount) const {
+ if (iStart)
+ *iStart = m_iLastStart;
+ if (iCount)
+ *iCount = m_iLastCount;
+ return m_LastBidi;
+}
+
+void CFX_BidiChar::SaveCurrentStateToLastState() {
+ m_LastBidi = m_CurBidi;
+ m_iLastStart = m_iCurStart;
+ m_iCurStart = m_iCurCount;
+ m_iLastCount = m_iCurCount - m_iLastStart;
+}
diff --git a/core/src/fxcrt/fx_bidi_unittest.cpp b/core/src/fxcrt/fx_bidi_unittest.cpp
new file mode 100644
index 0000000..c629cbb
--- /dev/null
+++ b/core/src/fxcrt/fx_bidi_unittest.cpp
@@ -0,0 +1,136 @@
+// Copyright 2015 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.
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "../../include/fxcrt/fx_bidi.h"
+
+namespace {
+
+const FX_WCHAR kNeutralChar = 32;
+const FX_WCHAR kLeftChar = 65;
+const FX_WCHAR kRightChar = 1424;
+
+} // namespace
+
+TEST(fxcrt, BidiCharEmpty) {
+ int32_t start = -1;
+ int32_t count = -1;
+ CFX_BidiChar bidi;
+ CFX_BidiChar::Direction dir = bidi.GetBidiInfo(nullptr, nullptr);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+
+ dir = bidi.GetBidiInfo(&start, nullptr);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+ EXPECT_EQ(0, start);
+
+ dir = bidi.GetBidiInfo(nullptr, &count);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+ EXPECT_EQ(0, count);
+
+ start = -1;
+ count = -1;
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(0, count);
+
+ EXPECT_FALSE(bidi.EndChar());
+}
+
+TEST(fxcrt, BidiCharLeft) {
+ int32_t start = -1;
+ int32_t count = -1;
+ CFX_BidiChar bidi;
+
+ EXPECT_TRUE(bidi.AppendChar(kLeftChar));
+ CFX_BidiChar::Direction dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(0, count);
+
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(0, count);
+
+ EXPECT_TRUE(bidi.EndChar());
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::LEFT, dir);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(3, count);
+
+ EXPECT_FALSE(bidi.EndChar());
+}
+
+TEST(fxcrt, BidiCharLeftNeutralRight) {
+ int32_t start = -1;
+ int32_t count = -1;
+ CFX_BidiChar bidi;
+
+ EXPECT_TRUE(bidi.AppendChar(kLeftChar));
+ CFX_BidiChar::Direction dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(0, count);
+
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+ EXPECT_TRUE(bidi.AppendChar(kNeutralChar));
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(3, count);
+
+ EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
+ EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
+ EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
+ EXPECT_TRUE(bidi.AppendChar(kRightChar));
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::NEUTRAL, dir);
+ EXPECT_EQ(3, start);
+ EXPECT_EQ(4, count);
+
+ EXPECT_TRUE(bidi.EndChar());
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::RIGHT, dir);
+ EXPECT_EQ(7, start);
+ EXPECT_EQ(1, count);
+
+ EXPECT_FALSE(bidi.EndChar());
+}
+
+TEST(fxcrt, BidiCharLeftRightLeft) {
+ int32_t start = -1;
+ int32_t count = -1;
+ CFX_BidiChar bidi;
+
+ EXPECT_TRUE(bidi.AppendChar(kLeftChar));
+ CFX_BidiChar::Direction dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(0, count);
+
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+ EXPECT_FALSE(bidi.AppendChar(kLeftChar));
+ EXPECT_TRUE(bidi.AppendChar(kRightChar));
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(0, start);
+ EXPECT_EQ(3, count);
+
+ EXPECT_FALSE(bidi.AppendChar(kRightChar));
+ EXPECT_FALSE(bidi.AppendChar(kRightChar));
+ EXPECT_FALSE(bidi.AppendChar(kRightChar));
+ EXPECT_TRUE(bidi.AppendChar(kLeftChar));
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::RIGHT, dir);
+ EXPECT_EQ(3, start);
+ EXPECT_EQ(4, count);
+
+ EXPECT_TRUE(bidi.EndChar());
+ dir = bidi.GetBidiInfo(&start, &count);
+ EXPECT_EQ(CFX_BidiChar::LEFT, dir);
+ EXPECT_EQ(7, start);
+ EXPECT_EQ(1, count);
+
+ EXPECT_FALSE(bidi.EndChar());
+}
diff --git a/core/src/fxcrt/fx_ucddata.cpp b/core/src/fxcrt/fx_ucddata.cpp
index 8b35f31..13c5da1 100644
--- a/core/src/fxcrt/fx_ucddata.cpp
+++ b/core/src/fxcrt/fx_ucddata.cpp
@@ -4,9 +4,10 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-#include "../../include/fxcrt/fx_system.h"
+#include "../../include/fxcrt/fx_basic.h"
+#include "../../include/fxcrt/fx_ucd.h"
-extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536] = {
+const FX_DWORD kTextLayoutCodeProperties[] = {
0xfffe9a93, 0xfffe9a93, 0xfffe9a93, 0xfffe9a93, 0xfffe9a93, 0xfffe9a93,
0xfffe9a93, 0xfffe9a93, 0xfffe9a93, 0xfffe8ae5, 0xfffe9b5c, 0xfffe9ada,
0xfffe9b1a, 0xfffe9b5b, 0xfffe9a93, 0xfffe9a93, 0xfffe9a93, 0xfffe9a93,
@@ -10931,7 +10932,11 @@
0xfffe02a4, 0xfffe02a4, 0xfffe02a4, 0xfffe3013, 0xfffe3013, 0xfffe3013,
0xfffe3011, 0xfffe3022, 0xfffe1aa4, 0xfffe1aa4,
};
-extern const FX_WCHAR gs_FX_TextLayout_VerticalMirror[64] = {
+
+const size_t kTextLayoutCodePropertiesSize =
+ FX_ArraySize(kTextLayoutCodeProperties);
+
+const FX_WCHAR kFXTextLayoutVerticalMirror[] = {
0xFE33, 0xFE32, 0xFE31, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE3F,
0xFE40, 0xFE3D, 0xFE3E, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE3B,
0xFE3C, 0xFE39, 0xFE3A, 0xFE34, 0xFE35, 0xFE36, 0xFE37, 0xFE38,
@@ -10941,7 +10946,10 @@
0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF,
0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF,
};
-extern const FX_WCHAR gs_FX_TextLayout_BidiMirror[512] = {
+const size_t kFXTextLayoutVerticalMirrorSize =
+ FX_ArraySize(kFXTextLayoutVerticalMirror);
+
+const FX_WCHAR kFXTextLayoutBidiMirror[] = {
0x0029, 0x0028, 0x003E, 0x003C, 0x005D, 0x005B, 0x007D, 0x007B, 0x00BB,
0x00AB, 0x0F3B, 0x0F3A, 0x0F3D, 0x0F3C, 0x169C, 0x169B, 0x2019, 0x2018,
0x201D, 0x201C, 0x203A, 0x2039, 0x2046, 0x2045, 0x207E, 0x207D, 0x208E,
@@ -11000,3 +11008,6 @@
0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF,
0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF, 0xFEFF,
};
+
+const size_t kFXTextLayoutBidiMirrorSize =
+ FX_ArraySize(kFXTextLayoutBidiMirror);
diff --git a/core/src/fxcrt/fx_unicode.cpp b/core/src/fxcrt/fx_unicode.cpp
index f05aeb5..c7ab618 100644
--- a/core/src/fxcrt/fx_unicode.cpp
+++ b/core/src/fxcrt/fx_unicode.cpp
@@ -6,58 +6,29 @@
#include "../../include/fxcrt/fx_ucd.h"
-extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536];
-extern const FX_WCHAR gs_FX_TextLayout_VerticalMirror[64];
-extern const FX_WCHAR gs_FX_TextLayout_BidiMirror[512];
FX_DWORD FX_GetUnicodeProperties(FX_WCHAR wch) {
- return gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
+ size_t idx = static_cast<size_t>(wch);
+ if (idx < kTextLayoutCodePropertiesSize)
+ return kTextLayoutCodeProperties[(FX_WORD)wch];
+ return 0;
}
-FX_BOOL FX_IsCtrlCode(FX_WCHAR ch) {
- FX_DWORD dwRet =
- (gs_FX_TextLayout_CodeProperties[(FX_WORD)ch] & FX_CHARTYPEBITSMASK);
- return dwRet == FX_CHARTYPE_Tab || dwRet == FX_CHARTYPE_Control;
-}
-FX_BOOL FX_IsRotationCode(FX_WCHAR ch) {
- return (gs_FX_TextLayout_CodeProperties[(FX_WORD)ch] & 0x8000) != 0;
-}
-FX_BOOL FX_IsCombinationChar(FX_WCHAR wch) {
- FX_DWORD dwProps =
- (gs_FX_TextLayout_CodeProperties[(FX_WORD)wch] & FX_CHARTYPEBITSMASK);
- return dwProps == FX_CHARTYPE_Combination;
-}
-FX_BOOL FX_IsBidiChar(FX_WCHAR wch) {
- FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
- int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
- return (FX_BIDICLASS_R == iBidiCls || FX_BIDICLASS_AL == iBidiCls);
-}
+
FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_BOOL bRTL, FX_BOOL bVertical) {
- FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
+ FX_DWORD dwProps = FX_GetUnicodeProperties(wch);
FX_DWORD dwTemp = (dwProps & 0xFF800000);
if (bRTL && dwTemp < 0xFF800000) {
- wch = gs_FX_TextLayout_BidiMirror[dwTemp >> 23];
- dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
- }
- if (bVertical) {
- dwTemp = (dwProps & 0x007E0000);
- if (dwTemp < 0x007E0000) {
- wch = gs_FX_TextLayout_VerticalMirror[dwTemp >> 17];
+ size_t idx = dwTemp >> 23;
+ if (idx < kFXTextLayoutBidiMirrorSize) {
+ wch = kFXTextLayoutBidiMirror[idx];
+ dwProps = FX_GetUnicodeProperties(wch);
}
}
- return wch;
-}
-FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch,
- FX_DWORD dwProps,
- FX_BOOL bRTL,
- FX_BOOL bVertical) {
- FX_DWORD dwTemp = (dwProps & 0xFF800000);
- if (bRTL && dwTemp < 0xFF800000) {
- wch = gs_FX_TextLayout_BidiMirror[dwTemp >> 23];
- dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
- }
if (bVertical) {
dwTemp = (dwProps & 0x007E0000);
if (dwTemp < 0x007E0000) {
- wch = gs_FX_TextLayout_VerticalMirror[dwTemp >> 17];
+ size_t idx = dwTemp >> 17;
+ if (idx < kFXTextLayoutVerticalMirrorSize)
+ wch = kFXTextLayoutVerticalMirror[idx];
}
}
return wch;
diff --git a/pdfium.gyp b/pdfium.gyp
index d7f00bc..6e48c34 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -392,8 +392,8 @@
'type': 'static_library',
'ldflags': [ '-L<(PRODUCT_DIR)',],
'sources': [
- 'core/include/fxcrt/fx_arb.h',
'core/include/fxcrt/fx_basic.h',
+ 'core/include/fxcrt/fx_bidi.h',
'core/include/fxcrt/fx_coordinates.h',
'core/include/fxcrt/fx_ext.h',
'core/include/fxcrt/fx_memory.h',
@@ -410,8 +410,6 @@
'core/src/fxcrt/fxcrt_posix.h',
'core/src/fxcrt/fxcrt_windows.cpp',
'core/src/fxcrt/fxcrt_windows.h',
- 'core/src/fxcrt/fx_arabic.cpp',
- 'core/src/fxcrt/fx_arabic.h',
'core/src/fxcrt/fx_basic_array.cpp',
'core/src/fxcrt/fx_basic_bstring.cpp',
'core/src/fxcrt/fx_basic_buffer.cpp',
@@ -424,6 +422,7 @@
'core/src/fxcrt/fx_basic_utf.cpp',
'core/src/fxcrt/fx_basic_util.cpp',
'core/src/fxcrt/fx_basic_wstring.cpp',
+ 'core/src/fxcrt/fx_bidi.cpp',
'core/src/fxcrt/fx_extension.cpp',
'core/src/fxcrt/fx_ucddata.cpp',
'core/src/fxcrt/fx_unicode.cpp',
@@ -723,6 +722,7 @@
'core/src/fxcrt/fx_basic_bstring_unittest.cpp',
'core/src/fxcrt/fx_basic_memmgr_unittest.cpp',
'core/src/fxcrt/fx_basic_wstring_unittest.cpp',
+ 'core/src/fxcrt/fx_bidi_unittest.cpp',
'core/src/fxcrt/fx_system_unittest.cpp',
'testing/fx_string_testhelpers.h',
'testing/fx_string_testhelpers.cpp',
