1 files changed, 66 insertions, 0 deletions
diff --git a/xfa/fde/css/cfde_csstextbuf.h b/xfa/fde/css/cfde_csstextbuf.h
new file mode 100644
index 0000000000..df151e02d8
--- /dev/null
+++ b/xfa/fde/css/cfde_csstextbuf.h
@@ -0,0 +1,66 @@
+// Copyright 2017 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 XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_
+#define XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/fx_memory.h"
+#include "core/fxcrt/fx_system.h"
+#include "xfa/fgas/crt/fgas_stream.h"
+
+class CFDE_CSSTextBuf {
+ public:
+  CFDE_CSSTextBuf();
+  ~CFDE_CSSTextBuf();
+
+  bool AttachBuffer(const FX_WCHAR* pBuffer, int32_t iBufLen);
+  bool EstimateSize(int32_t iAllocSize);
+  int32_t LoadFromStream(const CFX_RetainPtr<IFGAS_Stream>& pTxtStream,
+                         int32_t iStreamOffset,
+                         int32_t iMaxChars,
+                         bool& bEOS);
+  bool AppendChar(FX_WCHAR wch) {
+    if (m_iDatLen >= m_iBufLen && !ExpandBuf(m_iBufLen * 2))
+      return false;
+    m_pBuffer[m_iDatLen++] = wch;
+    return true;
+  }
+
+  void Clear() { m_iDatPos = m_iDatLen = 0; }
+  void Reset();
+
+  int32_t TrimEnd() {
+    while (m_iDatLen > 0 && m_pBuffer[m_iDatLen - 1] <= ' ')
+      --m_iDatLen;
+    AppendChar(0);
+    return --m_iDatLen;
+  }
+
+  void Subtract(int32_t iStart, int32_t iLength);
+  bool IsEOF() const { return m_iDatPos >= m_iDatLen; }
+
+  FX_WCHAR GetAt(int32_t index) const { return m_pBuffer[index]; }
+  FX_WCHAR GetChar() const { return m_pBuffer[m_iDatPos]; }
+  FX_WCHAR GetNextChar() const {
+    return (m_iDatPos + 1 >= m_iDatLen) ? 0 : m_pBuffer[m_iDatPos + 1];
+  }
+
+  void MoveNext() { m_iDatPos++; }
+
+  int32_t GetLength() const { return m_iDatLen; }
+  const FX_WCHAR* GetBuffer() const { return m_pBuffer; }
+
+ protected:
+  bool ExpandBuf(int32_t iDesiredSize);
+  bool m_bExtBuf;
+  FX_WCHAR* m_pBuffer;
+  int32_t m_iBufLen;
+  int32_t m_iDatLen;
+  int32_t m_iDatPos;
+};
+
+#endif  // XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_