Move CSS code to core

The xfa/fde/css code has no other links into xfa/. This CL moves the css
code to core/fxcrt/css and sets to only build when pdf_enable_xfa is
enabled.

Change-Id: Iefd208e1f83a28b80b567c574e841e87bce310be
Reviewed-on: https://pdfium-review.googlesource.com/9251
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/core/fxcrt/css/cfx_csssyntaxparser.h b/core/fxcrt/css/cfx_csssyntaxparser.h
new file mode 100644
index 0000000000..9ddedfe4a7
--- /dev/null
+++ b/core/fxcrt/css/cfx_csssyntaxparser.h
@@ -0,0 +1,75 @@
+// 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 CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_
+#define CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_
+
+#include <stack>
+
+#include "core/fxcrt/css/cfx_cssexttextbuf.h"
+#include "core/fxcrt/css/cfx_csstextbuf.h"
+#include "core/fxcrt/fx_string.h"
+
+#define CFX_CSSSYNTAXCHECK_AllowCharset 1
+#define CFX_CSSSYNTAXCHECK_AllowImport 2
+
+enum class CFX_CSSSyntaxMode {
+  RuleSet,
+  Comment,
+  UnknownRule,
+  Selector,
+  PropertyName,
+  PropertyValue,
+};
+
+enum class CFX_CSSSyntaxStatus : uint8_t {
+  Error,
+  EOS,
+  None,
+  StyleRule,
+  Selector,
+  DeclOpen,
+  DeclClose,
+  PropertyName,
+  PropertyValue,
+};
+
+class CFX_CSSSyntaxParser {
+ public:
+  CFX_CSSSyntaxParser(const wchar_t* pBuffer, int32_t iBufferSize);
+  CFX_CSSSyntaxParser(const wchar_t* pBuffer,
+                      int32_t iBufferSize,
+                      int32_t iTextDatSize,
+                      bool bOnlyDeclaration);
+  ~CFX_CSSSyntaxParser();
+
+  CFX_CSSSyntaxStatus DoSyntaxParse();
+  CFX_WideStringC GetCurrentString() const;
+
+ protected:
+  void SwitchMode(CFX_CSSSyntaxMode eMode);
+  int32_t SwitchToComment();
+
+  bool RestoreMode();
+  bool AppendChar(wchar_t wch);
+  int32_t SaveTextData();
+  bool IsCharsetEnabled() const {
+    return (m_dwCheck & CFX_CSSSYNTAXCHECK_AllowCharset) != 0;
+  }
+  void DisableCharset() { m_dwCheck = CFX_CSSSYNTAXCHECK_AllowImport; }
+  bool IsImportEnabled() const;
+  void DisableImport() { m_dwCheck = 0; }
+
+  CFX_CSSTextBuf m_TextData;
+  CFX_CSSExtTextBuf m_TextPlane;
+  int32_t m_iTextDataLen;
+  uint32_t m_dwCheck;
+  CFX_CSSSyntaxMode m_eMode;
+  CFX_CSSSyntaxStatus m_eStatus;
+  std::stack<CFX_CSSSyntaxMode> m_ModeStack;
+};
+
+#endif  // CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_