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      1 /*
      2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef CSSTimingFunctionValue_h
     27 #define CSSTimingFunctionValue_h
     28 
     29 #include "CSSValue.h"
     30 #include <wtf/PassRefPtr.h>
     31 
     32 namespace WebCore {
     33 
     34 class CSSTimingFunctionValue : public CSSValue {
     35 public:
     36     virtual String cssText() const = 0;
     37 
     38     virtual bool isLinearTimingFunctionValue() const { return false; }
     39     virtual bool isCubicBezierTimingFunctionValue() const { return false; }
     40     virtual bool isStepsTimingFunctionValue() const { return false; }
     41 
     42 protected:
     43     CSSTimingFunctionValue()
     44     {
     45     }
     46 
     47     virtual bool isTimingFunctionValue() const { return true; }
     48 };
     49 
     50 class CSSLinearTimingFunctionValue : public CSSTimingFunctionValue {
     51 public:
     52     static PassRefPtr<CSSLinearTimingFunctionValue> create()
     53     {
     54         return adoptRef(new CSSLinearTimingFunctionValue);
     55     }
     56 
     57 private:
     58     CSSLinearTimingFunctionValue()
     59     {
     60     }
     61 
     62     virtual String cssText() const;
     63 
     64     virtual bool isLinearTimingFunctionValue() const { return true; }
     65 };
     66 
     67 class CSSCubicBezierTimingFunctionValue : public CSSTimingFunctionValue {
     68 public:
     69     static PassRefPtr<CSSCubicBezierTimingFunctionValue> create(double x1, double y1, double x2, double y2)
     70     {
     71         return adoptRef(new CSSCubicBezierTimingFunctionValue(x1, y1, x2, y2));
     72     }
     73 
     74     double x1() const { return m_x1; }
     75     double y1() const { return m_y1; }
     76     double x2() const { return m_x2; }
     77     double y2() const { return m_y2; }
     78 
     79 private:
     80     CSSCubicBezierTimingFunctionValue(double x1, double y1, double x2, double y2)
     81         : m_x1(x1)
     82         , m_y1(y1)
     83         , m_x2(x2)
     84         , m_y2(y2)
     85     {
     86     }
     87 
     88     virtual String cssText() const;
     89 
     90     virtual bool isCubicBezierTimingFunctionValue() const { return true; }
     91 
     92     double m_x1;
     93     double m_y1;
     94     double m_x2;
     95     double m_y2;
     96 };
     97 
     98 class CSSStepsTimingFunctionValue : public CSSTimingFunctionValue {
     99 public:
    100     static PassRefPtr<CSSStepsTimingFunctionValue> create(int steps, bool stepAtStart)
    101     {
    102         return adoptRef(new CSSStepsTimingFunctionValue(steps, stepAtStart));
    103     }
    104 
    105     int numberOfSteps() const { return m_steps; }
    106     bool stepAtStart() const { return m_stepAtStart; }
    107 
    108 private:
    109     CSSStepsTimingFunctionValue(int steps, bool stepAtStart)
    110         : m_steps(steps)
    111         , m_stepAtStart(stepAtStart)
    112     {
    113     }
    114 
    115     virtual String cssText() const;
    116 
    117     virtual bool isStepsTimingFunctionValue() const { return true; }
    118 
    119     int m_steps;
    120     bool m_stepAtStart;
    121 };
    122 
    123 } // namespace
    124 
    125 #endif
    126