Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/LayoutUnit.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LayoutUnit_h
 #define LayoutUnit_h
 
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
 #include "wtf/MathExtras.h"
 #include "wtf/SaturatedArithmetic.h"
+#include "wtf/text/WTFString.h"
 #include <algorithm>
 #include <limits.h>
 #include <limits>
 #include <stdlib.h>
 
 namespace blink {
 
 #if DCHECK_IS_ON()
 #define REPORT_OVERFLOW(doesOverflow) DLOG_IF(ERROR, !(doesOverflow)) << "LayoutUnit overflow !(" << #doesOverflow << ") in " << WTF_PRETTY_FUNCTION
 #else
@@ skipping 157 matching lines @@
         LayoutUnit m;
         m.m_value = std::numeric_limits<int>::min() + kFixedPointDenominator / 2;
         return m;
     }
 
     static LayoutUnit clamp(double value)
     {
         return clampTo<LayoutUnit>(value, LayoutUnit::min(), LayoutUnit::max());
     }
 
+    String toString() const
+    {
+        if (m_value == LayoutUnit::max().rawValue())

[esprehn, 2016/08/19 17:58:52]

can we make this out of line?

+            return String::format("LayoutUnit::max(%f)", toDouble());

[esprehn, 2016/08/19 17:58:53]

fwiw this is slow, doing "LayoutUnit::max(" + String::number(toDouble()) + ")"
avoids the extra allocations and copies. This code isn't very performance
sensitive though so this is fine :)

+        if (m_value == LayoutUnit::min().rawValue())
+            return String::format("LayoutUnit::min(%f)", toDouble());
+        if (m_value == LayoutUnit::nearlyMax().rawValue())
+            return String::format("LayoutUnit::nearlyMax(%f)", toDouble());
+        if (m_value == LayoutUnit::nearlyMin().rawValue())
+            return String::format("LayoutUnit::nearlyMin(%f)", toDouble());
+        return String::number(toDouble());
+    }
+
 private:
     static bool isInBounds(int value)
     {
         return ::abs(value) <= std::numeric_limits<int>::max() / kFixedPointDenominator;
     }
     static bool isInBounds(unsigned value)
     {
         return value <= static_cast<unsigned>(std::numeric_limits<int>::max()) / kFixedPointDenominator;
     }
     static bool isInBounds(double value)
@@ skipping 576 matching lines @@
 {
     if (value >= max)
         return max;
     if (value <= min)
         return min;
     return value;
 }
 
 inline std::ostream& operator<<(std::ostream& stream, const LayoutUnit& value)
 {
-    return stream << value.toDouble();
+    return stream << value.toString();
 }
 
 } // namespace blink
 
 #endif // LayoutUnit_h