Cleanup IFX_BidiChar

core/src/fxcrt/fx_bidi.cpp

 // 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"
-#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_iCurStart(0),
       m_iCurCount(0),
-      m_iCurBidi(0),
-      m_iLastBidi(0),
+      m_CurBidi(NEUTRAL),
       m_iLastStart(0),
-      m_iLastCount(0) {}
-void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) {
-  m_bSeparateNeutral = bSeparateNeutral;
+      m_iLastCount(0),
+      m_LastBidi(NEUTRAL) {
 }
 
-FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) {
-  FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
+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;
-  int32_t iContext = 0;
+  Direction bidi = NEUTRAL;
   switch (iBidiCls) {
     case FX_BIDICLASS_L:
     case FX_BIDICLASS_AN:
     case FX_BIDICLASS_EN:
-      iContext = 1;
+      bidi = LEFT;
       break;
     case FX_BIDICLASS_R:
     case FX_BIDICLASS_AL:
-      iContext = 2;
+      bidi = RIGHT;
       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;
-    }
+
+  bool bRet = (bidi != m_CurBidi);
+  if (bRet) {
+    SaveCurrentStateToLastState();
+    m_CurBidi = bidi;
   }
   m_iCurCount++;
   return bRet;
 }
-FX_BOOL CFX_BidiChar::EndChar() {
-  m_iLastBidi = m_iCurBidi;
+
+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;
-  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;
-}