From 5110c4743751145c4ae1934cd1d83bc6c55bb43f Mon Sep 17 00:00:00 2001
From: John Abd-El-Malek <jabdelmalek@google.com>
Date: Sat, 17 May 2014 22:33:34 -0700
Subject: Initial commit.

---
 core/src/fxcrt/fx_arabic.cpp | 86 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 core/src/fxcrt/fx_arabic.cpp

(limited to 'core/src/fxcrt/fx_arabic.cpp')

diff --git a/core/src/fxcrt/fx_arabic.cpp b/core/src/fxcrt/fx_arabic.cpp
new file mode 100644
index 0000000000..583ce817cf
--- /dev/null
+++ b/core/src/fxcrt/fx_arabic.cpp
@@ -0,0 +1,86 @@
+// 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_ext.h"
+#include "fx_arabic.h"
+extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536];
+IFX_BidiChar* IFX_BidiChar::Create()
+{
+    return FX_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)
+{
+}
+FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch)
+{
+    FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
+    FX_INT32 iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
+    FX_INT32 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;
+}
+FX_INT32 CFX_BidiChar::GetBidiInfo(FX_INT32 &iStart, FX_INT32 &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;
+}
-- 
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