third_party/WebKit/Source/core/html/HTMLMeterElement.h

   1 /*
   2  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public License
  15  * along with this library; see the file COPYING.LIB.  If not, write to
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #ifndef HTMLMeterElement_h
  22 #define HTMLMeterElement_h
  23
  24 #include "core/CoreExport.h"
  25 #include "core/html/LabelableElement.h"
  26
  27 namespace blink {
  28
  29 class MeterValueElement;
  30 class LayoutMeter;
  31
  32 class CORE_EXPORT HTMLMeterElement final : public LabelableElement {
  33     DEFINE_WRAPPERTYPEINFO();
  34 public:
  35     static PassRefPtrWillBeRawPtr<HTMLMeterElement> create(Document&);
  36
  37     enum GaugeRegion {
  38         GaugeRegionOptimum,
  39         GaugeRegionSuboptimal,
  40         GaugeRegionEvenLessGood
  41     };
  42
  43     double value() const;
  44     void setValue(double);
  45
  46     double min() const;
  47     void setMin(double);
  48
  49     double max() const;
  50     void setMax(double);
  51
  52     double low() const;
  53     void setLow(double);
  54
  55     double high() const;
  56     void setHigh(double);
  57
  58     double optimum() const;
  59     void setOptimum(double);
  60
  61     double valueRatio() const;
  62     GaugeRegion gaugeRegion() const;
  63
  64     bool canContainRangeEndPoint() const override { return false; }
  65
  66     DECLARE_VIRTUAL_TRACE();
  67
  68 private:
  69     explicit HTMLMeterElement(Document&);
  70     ~HTMLMeterElement() override;
  71
  72     bool areAuthorShadowsAllowed() const override { return false; }
  73     void willAddFirstAuthorShadowRoot() override;
  74     LayoutMeter* layoutMeter() const;
  75
  76     bool supportLabels() const override { return true; }
  77
  78     LayoutObject* createLayoutObject(const ComputedStyle&) override;
  79     void parseAttribute(const QualifiedName&, const AtomicString&) override;
  80
  81     void didElementStateChange();
  82     void didAddUserAgentShadowRoot(ShadowRoot&) override;
  83
  84     RefPtrWillBeMember<MeterValueElement> m_value;
  85 };
  86
  87 } // namespace blink
  88
  89 #endif // HTMLMeterElement_h