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/*
* Copyright (C) 2008-2017 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ControlStyle.h"
#include "ThemeTypes.h"
#include <optional>
#include <wtf/Forward.h>
namespace WebCore {
class FloatRect;
class FloatSize;
class FontCascade;
class FontCascadeDescription;
class GraphicsContext;
class ScrollView;
struct LengthSize;
class Theme {
public:
static Theme& singleton();
// The font description result should have a zoomed font size.
virtual std::optional<FontCascadeDescription> controlFont(StyleAppearance, const FontCascade&, float) const;
// The size here is in zoomed coordinates already. If a new size is returned, it also needs to be in zoomed coordinates.
virtual LengthSize controlSize(StyleAppearance, const FontCascade&, const LengthSize&, float) const;
// Returns the minimum size for a control in zoomed coordinates.
LengthSize minimumControlSize(StyleAppearance, const FontCascade&, const LengthSize& zoomedSize, const LengthSize& nonShrinkableZoomedSize, float zoomFactor) const;
// Allows the theme to modify the existing padding/border.
virtual LengthBox controlPadding(StyleAppearance, const FontCascade&, const LengthBox& zoomedBox, float zoomFactor) const;
virtual LengthBox controlBorder(StyleAppearance, const FontCascade&, const LengthBox& zoomedBox, float zoomFactor) const;
// Whether or not whitespace: pre should be forced on always.
virtual bool controlRequiresPreWhiteSpace(StyleAppearance) const { return false; }
virtual void drawNamedImage(const String&, GraphicsContext&, const FloatSize&) const;
virtual bool userPrefersContrast() const { return false; }
virtual bool userPrefersReducedMotion() const { return false; }
virtual bool userPrefersOnOffLabels() const { return false; }
protected:
Theme() = default;
virtual ~Theme() = default;
virtual LengthSize minimumControlSize(StyleAppearance, const FontCascade&, const LengthSize& zoomedSize, float zoomFactor) const;
private:
Theme(const Theme&) = delete;
void operator=(const Theme&) = delete;
};
} // namespace WebCore
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