--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/Length.h	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,151 @@
+/*
+    This file is part of the KDE libraries
+
+    Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+    Copyright (C) 2006 Apple Computer, Inc.
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef Length_h
+#define Length_h
+
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+    const int undefinedLength = -1;
+    const int percentScaleFactor = 128;
+
+    enum LengthType { Auto, Relative, Percent, Fixed, Static, Intrinsic, MinIntrinsic };
+
+    struct Length {
+        Length()
+            : m_value(0)
+        {
+        }
+
+        Length(LengthType t)
+            : m_value(t)
+        {
+        }
+
+        Length(int v, LengthType t, bool q = false)
+            : m_value((v * 16) | (q << 3) | t) // FIXME: Doesn't work if the passed-in value is very large!
+        {
+            ASSERT(t != Percent);
+        }
+
+        Length(double v, LengthType t, bool q = false)
+            : m_value(static_cast<int>(v * percentScaleFactor) * 16 | (q << 3) | t)
+        {
+            ASSERT(t == Percent);
+        }
+
+        bool operator==(const Length& o) const { return m_value == o.m_value; }
+        bool operator!=(const Length& o) const { return m_value != o.m_value; }
+
+        int value() const {
+            ASSERT(type() != Percent);
+            return rawValue();
+        }
+
+        int rawValue() const { return (m_value & ~0xF) / 16; }
+
+        double percent() const
+        {
+            ASSERT(type() == Percent);
+            return static_cast<double>(rawValue()) / percentScaleFactor;
+        }
+
+        LengthType type() const { return static_cast<LengthType>(m_value & 7); }
+        bool quirk() const { return (m_value >> 3) & 1; }
+
+        void setValue(LengthType t, int value)
+        {
+            ASSERT(t != Percent);
+            setRawValue(t, value);
+        }
+
+        void setRawValue(LengthType t, int value) { m_value = value * 16 | (m_value & 0x8) | t; }
+
+        void setValue(int value)
+        {
+            ASSERT(!value || type() != Percent);
+            setRawValue(value);
+        }
+
+        void setRawValue(int value) { m_value = value * 16 | (m_value & 0xF); }
+
+        void setValue(LengthType t, double value)
+        {
+            ASSERT(t == Percent);
+            m_value = static_cast<int>(value * percentScaleFactor) * 16 | (m_value & 0x8) | t;
+        }
+
+        void setValue(double value)
+        {
+            ASSERT(type() == Percent);
+            m_value = static_cast<int>(value * percentScaleFactor) * 16 | (m_value & 0xF);
+        }
+
+        // note: works only for certain types, returns undefinedLength otherwise
+        int calcValue(int maxValue) const
+        {
+            switch (type()) {
+                case Fixed:
+                    return value();
+                case Percent:
+                    return maxValue * rawValue() / (100 * percentScaleFactor);
+                case Auto:
+                    return maxValue;
+                default:
+                    return undefinedLength;
+            }
+        }
+
+        int calcMinValue(int maxValue) const
+        {
+            switch (type()) {
+                case Fixed:
+                    return value();
+                case Percent:
+                    return maxValue * rawValue() / (100 * percentScaleFactor);
+                case Auto:
+                default:
+                    return 0;
+            }
+        }
+
+        bool isUndefined() const { return rawValue() == undefinedLength; }
+        bool isZero() const { return !(m_value & ~0xF); }
+        bool isPositive() const { return rawValue() > 0; }
+        bool isNegative() const { return rawValue() < 0; }
+
+        bool isAuto() const { return type() == Auto; }
+        bool isRelative() const { return type() == Relative; }
+        bool isPercent() const { return type() == Percent; }
+        bool isFixed() const { return type() == Fixed; }
+        bool isStatic() const { return type() == Static; }
+        bool isIntrinsicOrAuto() const { return type() == Auto || type() == MinIntrinsic || type() == Intrinsic; }
+
+    private:
+        int m_value;
+    };
+
+} // namespace WebCore
+
+#endif // Length_h