Split CFDE_CSSPrimitiveValue apart

This CL splits the CFDE_CSSPrimitiveValue class into individual classes per
value type. This moves the numeric itypes out of the FDE_CSSPrimitiveType
list and creates a new CFDE_CSSNumberType list.

Change-Id: I6f55e9e3509de7ff1e82dcf018a1f1c472565e54
Reviewed-on: https://pdfium-review.googlesource.com/2250
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/xfa/fde/css/cfde_cssvaluelistparser.cpp b/xfa/fde/css/cfde_cssvaluelistparser.cpp
new file mode 100644
index 0000000000..3c204b0d2b
--- /dev/null
+++ b/xfa/fde/css/cfde_cssvaluelistparser.cpp
@@ -0,0 +1,116 @@
+// 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 "xfa/fde/css/cfde_cssvaluelistparser.h"
+
+CFDE_CSSValueListParser::CFDE_CSSValueListParser(const FX_WCHAR* psz,
+                                                 int32_t iLen,
+                                                 FX_WCHAR separator)
+    : m_Separator(separator), m_pCur(psz), m_pEnd(psz + iLen) {
+  ASSERT(psz && iLen > 0);
+}
+
+bool CFDE_CSSValueListParser::NextValue(FDE_CSSPrimitiveType& eType,
+                                        const FX_WCHAR*& 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 = FDE_CSSPrimitiveType::Unknown;
+  pStart = m_pCur;
+  iLength = 0;
+  FX_WCHAR wch = *m_pCur;
+  if (wch == '#') {
+    iLength = SkipTo(' ');
+    if (iLength == 4 || iLength == 7) {
+      eType = FDE_CSSPrimitiveType::RGB;
+    }
+  } else if ((wch >= '0' && wch <= '9') || wch == '.' || wch == '-' ||
+             wch == '+') {
+    while (m_pCur < m_pEnd && (*m_pCur > ' ' && *m_pCur != m_Separator)) {
+      ++m_pCur;
+    }
+    iLength = m_pCur - pStart;
+    if (iLength > 0) {
+      eType = FDE_CSSPrimitiveType::Number;
+    }
+  } else if (wch == '\"' || wch == '\'') {
+    pStart++;
+    iLength = SkipTo(wch) - 1;
+    m_pCur++;
+    eType = FDE_CSSPrimitiveType::String;
+  } else if (m_pEnd - m_pCur > 5 && m_pCur[3] == '(') {
+    if (FXSYS_wcsnicmp(L"url", m_pCur, 3) == 0) {
+      wch = m_pCur[4];
+      if (wch == '\"' || wch == '\'') {
+        pStart += 5;
+        iLength = SkipTo(wch) - 6;
+        m_pCur += 2;
+      } else {
+        pStart += 4;
+        iLength = SkipTo(')') - 4;
+        m_pCur++;
+      }
+      eType = FDE_CSSPrimitiveType::String;
+    } else if (FXSYS_wcsnicmp(L"rgb", m_pCur, 3) == 0) {
+      iLength = SkipTo(')') + 1;
+      m_pCur++;
+      eType = FDE_CSSPrimitiveType::RGB;
+    }
+  } else {
+    iLength = SkipTo(m_Separator, true, true);
+    eType = FDE_CSSPrimitiveType::String;
+  }
+  return m_pCur <= m_pEnd && iLength > 0;
+}
+int32_t CFDE_CSSValueListParser::SkipTo(FX_WCHAR wch,
+                                        bool bWSSeparator,
+                                        bool bBrContinue) {
+  const FX_WCHAR* pStart = m_pCur;
+  if (!bBrContinue) {
+    if (bWSSeparator) {
+      while ((++m_pCur < m_pEnd) && (*m_pCur != wch) && (*m_pCur > ' ')) {
+        continue;
+      }
+    } else {
+      while (++m_pCur < m_pEnd && *m_pCur != wch) {
+        continue;
+      }
+    }
+
+  } else {
+    int32_t iBracketCount = 0;
+    if (bWSSeparator) {
+      while ((m_pCur < m_pEnd) && (*m_pCur != wch) && (*m_pCur > ' ')) {
+        if (*m_pCur == '(') {
+          iBracketCount++;
+        } else if (*m_pCur == ')') {
+          iBracketCount--;
+        }
+        m_pCur++;
+      }
+    } else {
+      while (m_pCur < m_pEnd && *m_pCur != wch) {
+        if (*m_pCur == '(') {
+          iBracketCount++;
+        } else if (*m_pCur == ')') {
+          iBracketCount--;
+        }
+        m_pCur++;
+      }
+    }
+    while (iBracketCount > 0 && m_pCur < m_pEnd) {
+      if (*m_pCur == ')') {
+        iBracketCount--;
+      }
+      m_pCur++;
+    }
+  }
+  return m_pCur - pStart;
+}