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, 87 insertions, 0 deletions

diff --git a/core/fxcrt/css/cfx_cssvaluelistparser.cpp b/core/fxcrt/css/cfx_cssvaluelistparser.cpp
new file mode 100644
index 0000000000..05204e5621
--- /dev/null
+++ b/core/fxcrt/css/cfx_cssvaluelistparser.cpp
@@ -0,0 +1,87 @@
+// 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
+
+#include "core/fxcrt/css/cfx_cssvaluelistparser.h"
+
+#include "core/fxcrt/fx_extension.h"
+
+CFX_CSSValueListParser::CFX_CSSValueListParser(const wchar_t* psz,
+                                               int32_t iLen,
+                                               wchar_t separator)
+    : m_Separator(separator), m_pCur(psz), m_pEnd(psz + iLen) {
+  ASSERT(psz && iLen > 0);
+}
+
+bool CFX_CSSValueListParser::NextValue(CFX_CSSPrimitiveType& eType,
+                                       const wchar_t*& pStart,
+                                       int32_t& iLength) {
+  while (m_pCur < m_pEnd && (*m_pCur <= ' ' || *m_pCur == m_Separator))
+    ++m_pCur;
+
+  if (m_pCur >= m_pEnd)
+    return false;
+
+  eType = CFX_CSSPrimitiveType::Unknown;
+  pStart = m_pCur;
+  iLength = 0;
+  wchar_t wch = *m_pCur;
+  if (wch == '#') {
+    iLength = SkipTo(' ', false, false);
+    if (iLength == 4 || iLength == 7)
+      eType = CFX_CSSPrimitiveType::RGB;
+  } else if (std::iswdigit(wch) || wch == '.' || wch == '-' || wch == '+') {
+    while (m_pCur < m_pEnd && (*m_pCur > ' ' && *m_pCur != m_Separator))
+      ++m_pCur;
+
+    iLength = m_pCur - pStart;
+    eType = CFX_CSSPrimitiveType::Number;
+  } else if (wch == '\"' || wch == '\'') {
+    pStart++;
+    m_pCur++;
+    iLength = SkipTo(wch, false, false);
+    m_pCur++;
+    eType = CFX_CSSPrimitiveType::String;
+  } else if (m_pEnd - m_pCur > 5 && m_pCur[3] == '(') {
+    if (FXSYS_wcsnicmp(L"rgb", m_pCur, 3) == 0) {
+      iLength = SkipTo(')', false, false) + 1;
+      m_pCur++;
+      eType = CFX_CSSPrimitiveType::RGB;
+    }
+  } else {
+    iLength = SkipTo(m_Separator, true, true);
+    eType = CFX_CSSPrimitiveType::String;
+  }
+  return m_pCur <= m_pEnd && iLength > 0;
+}
+
+int32_t CFX_CSSValueListParser::SkipTo(wchar_t wch,
+                                       bool breakOnSpace,
+                                       bool matchBrackets) {
+  const wchar_t* pStart = m_pCur;
+  int32_t bracketCount = 0;
+  while (m_pCur < m_pEnd && *m_pCur != wch) {
+    if (breakOnSpace && *m_pCur <= ' ')
+      break;
+    if (!matchBrackets) {
+      m_pCur++;
+      continue;
+    }
+
+    if (*m_pCur == '(')
+      bracketCount++;
+    else if (*m_pCur == ')')
+      bracketCount--;
+
+    m_pCur++;
+  }
+
+  while (bracketCount > 0 && m_pCur < m_pEnd) {
+    if (*m_pCur == ')')
+      bracketCount--;
+    m_pCur++;
+  }
+  return m_pCur - pStart;
+}