[CSS Grid Layout] Cache track breadth min/max content types

Source/core/rendering/style/GridTrackSize.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 
 namespace WebCore {
 
 enum GridTrackSizeType {
     LengthTrackSizing,
     MinMaxTrackSizing
 };
 
 class GridTrackSize {
 public:
-    GridTrackSize(LengthType type = Undefined)
+    GridTrackSize()
+        : m_type(LengthTrackSizing)
+        , m_minTrackBreadth(Undefined)
+        , m_maxTrackBreadth(Undefined)
+        , m_minTrackBreadthIsMinOrMaxContent(false)
+        , m_minTrackBreadthIsMaxContent(false)
+        , m_maxTrackBreadthIsMinOrMaxContent(false)
+        , m_maxTrackBreadthIsMaxContent(false)
+    {
+        // Someone has to set a valid lenght type through setLength or
+        // setMinMax before using the object.
+    }
+
+    GridTrackSize(LengthType type)
         : m_type(LengthTrackSizing)
         , m_minTrackBreadth(type)
         , m_maxTrackBreadth(type)
+        , m_minTrackBreadthIsMinOrMaxContent(false)
+        , m_minTrackBreadthIsMaxContent(false)
+        , m_maxTrackBreadthIsMinOrMaxContent(false)
+        , m_maxTrackBreadthIsMaxContent(false)
     {
+        ASSERT(type != Undefined);
+
+        cacheMinMaxTrackBreadthTypes();
     }
 
     const GridLength& length() const
     {
         ASSERT(m_type == LengthTrackSizing);
         ASSERT(m_minTrackBreadth == m_maxTrackBreadth);
         const GridLength& minTrackBreadth = m_minTrackBreadth;
         ASSERT(!minTrackBreadth.isLength() || !minTrackBreadth.length().isUndefined());
         return minTrackBreadth;
     }
 
     void setLength(const GridLength& length)
     {
         m_type = LengthTrackSizing;
         m_minTrackBreadth = length;
         m_maxTrackBreadth = length;
+
+        cacheMinMaxTrackBreadthTypes();
     }
 
     const GridLength& minTrackBreadth() const
     {
         ASSERT(!m_minTrackBreadth.isLength() || !m_minTrackBreadth.length().isUndefined());
         if (m_minTrackBreadth.isLength() && m_minTrackBreadth.length().isAuto()) {
             DEFINE_STATIC_LOCAL(GridLength, minContent, (MinContent));
             return minContent;
         }
         return m_minTrackBreadth;
     }
 
     const GridLength& maxTrackBreadth() const
     {
         ASSERT(!m_maxTrackBreadth.isLength() || !m_maxTrackBreadth.length().isUndefined());
         if (m_maxTrackBreadth.isLength() && m_maxTrackBreadth.length().isAuto()) {
             DEFINE_STATIC_LOCAL(GridLength, maxContent, (MaxContent));
             return maxContent;
         }
         return m_maxTrackBreadth;
     }
 
     void setMinMax(const GridLength& minTrackBreadth, const GridLength& maxTrackBreadth)
     {
         m_type = MinMaxTrackSizing;
         m_minTrackBreadth = minTrackBreadth;
         m_maxTrackBreadth = maxTrackBreadth;
+
+        cacheMinMaxTrackBreadthTypes();
     }
 
     GridTrackSizeType type() const { return m_type; }
 
     bool isContentSized() const { return m_minTrackBreadth.isContentSized() || m_maxTrackBreadth.isContentSized(); }
 
     bool operator==(const GridTrackSize& other) const
     {
         return m_type == other.m_type && m_minTrackBreadth == other.m_minTrackBreadth && m_maxTrackBreadth == other.m_maxTrackBreadth;
     }
 
-    bool hasMinOrMaxContentMinTrackBreadth() const { return minTrackBreadth().isLength() && (minTrackBreadth().length().isMinContent() || minTrackBreadth().length().isMaxContent()); }
-    bool hasMaxContentMinTrackBreadth() const { return minTrackBreadth().isLength() && minTrackBreadth().length().isMaxContent(); }
-    bool hasMinOrMaxContentMaxTrackBreadth() const { return maxTrackBreadth().isLength() && (maxTrackBreadth().length().isMinContent() || maxTrackBreadth().length().isMaxContent()); }
-    bool hasMaxContentMaxTrackBreadth() const { return maxTrackBreadth().isLength() && maxTrackBreadth().length().isMaxContent(); }
+    void cacheMinMaxTrackBreadthTypes()
+    {
+        m_minTrackBreadthIsMaxContent = minTrackBreadth().isLength() && minTrackBreadth().length().isMaxContent();
+        m_minTrackBreadthIsMinOrMaxContent = m_minTrackBreadthIsMaxContent || (minTrackBreadth().isLength() && minTrackBreadth().length().isMinContent());
+        m_maxTrackBreadthIsMaxContent = maxTrackBreadth().isLength() && maxTrackBreadth().length().isMaxContent();
+        m_maxTrackBreadthIsMinOrMaxContent = m_maxTrackBreadthIsMaxContent || (maxTrackBreadth().isLength() && maxTrackBreadth().length().isMinContent());
+    }
+
+    bool hasMinOrMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMinOrMaxContent; }
+    bool hasMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMaxContent; }
+    bool hasMinOrMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMinOrMaxContent; }
+    bool hasMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMaxContent; }
 
 private:
     GridTrackSizeType m_type;
     GridLength m_minTrackBreadth;
     GridLength m_maxTrackBreadth;
+    bool m_minTrackBreadthIsMinOrMaxContent;
+    bool m_minTrackBreadthIsMaxContent;
+    bool m_maxTrackBreadthIsMinOrMaxContent;
+    bool m_maxTrackBreadthIsMaxContent;
 };
 
 } // namespace WebCore
 
 #endif // GridTrackSize_h