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/*
* Copyright (C) 2005-2014 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. AND ITS CONTRIBUTORS ``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 ITS 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 "FloatSize.h"
#include "IntSize.h"
#include "ViewportArguments.h"
#include <wtf/Noncopyable.h>
namespace WTF {
class TextStream;
}
namespace WebCore {
static const double forceAlwaysUserScalableMaximumScale = 5.0;
static const double forceAlwaysUserScalableMinimumScale = 1.0;
class ViewportConfiguration {
WTF_MAKE_NONCOPYABLE(ViewportConfiguration); WTF_MAKE_FAST_ALLOCATED;
public:
// FIXME: unify with ViewportArguments.
struct Parameters {
double width { 0 };
double height { 0 };
double initialScale { 0 };
double minimumScale { 0 };
double maximumScale { 0 };
bool allowsUserScaling { false };
bool allowsShrinkToFit { false };
bool avoidsUnsafeArea { true };
bool widthIsSet { false };
bool heightIsSet { false };
bool initialScaleIsSet { false };
};
WEBCORE_EXPORT ViewportConfiguration();
const Parameters& defaultConfiguration() const { return m_defaultConfiguration; }
WEBCORE_EXPORT void setDefaultConfiguration(const Parameters&);
const IntSize& contentsSize() const { return m_contentSize; }
WEBCORE_EXPORT bool setContentsSize(const IntSize&);
const FloatSize& minimumLayoutSize() const { return m_minimumLayoutSize; }
WEBCORE_EXPORT bool setMinimumLayoutSize(const FloatSize&);
const ViewportArguments& viewportArguments() const { return m_viewportArguments; }
WEBCORE_EXPORT bool setViewportArguments(const ViewportArguments&);
WEBCORE_EXPORT bool setCanIgnoreScalingConstraints(bool);
void setForceAlwaysUserScalable(bool forceAlwaysUserScalable) { m_forceAlwaysUserScalable = forceAlwaysUserScalable; }
WEBCORE_EXPORT IntSize layoutSize() const;
WEBCORE_EXPORT double initialScale() const;
WEBCORE_EXPORT double initialScaleIgnoringContentSize() const;
WEBCORE_EXPORT double minimumScale() const;
double maximumScale() const { return m_forceAlwaysUserScalable ? forceAlwaysUserScalableMaximumScale : m_configuration.maximumScale; }
double maximumScaleIgnoringAlwaysScalable() const { return m_configuration.maximumScale; }
WEBCORE_EXPORT bool allowsUserScaling() const;
WEBCORE_EXPORT bool allowsUserScalingIgnoringAlwaysScalable() const;
bool allowsShrinkToFit() const;
bool avoidsUnsafeArea() const { return m_configuration.avoidsUnsafeArea; }
WEBCORE_EXPORT static Parameters webpageParameters();
WEBCORE_EXPORT static Parameters textDocumentParameters();
WEBCORE_EXPORT static Parameters imageDocumentParameters();
WEBCORE_EXPORT static Parameters xhtmlMobileParameters();
WEBCORE_EXPORT static Parameters testingParameters();
#ifndef NDEBUG
WTF::CString description() const;
WEBCORE_EXPORT void dump() const;
#endif
private:
void updateConfiguration();
double viewportArgumentsLength(double length) const;
double initialScaleFromSize(double width, double height, bool shouldIgnoreScalingConstraints) const;
int layoutWidth() const;
int layoutHeight() const;
bool shouldIgnoreScalingConstraints() const;
bool shouldIgnoreVerticalScalingConstraints() const;
bool shouldIgnoreHorizontalScalingConstraints() const;
Parameters m_configuration;
Parameters m_defaultConfiguration;
IntSize m_contentSize;
FloatSize m_minimumLayoutSize;
ViewportArguments m_viewportArguments;
bool m_canIgnoreScalingConstraints;
bool m_forceAlwaysUserScalable;
};
WTF::TextStream& operator<<(WTF::TextStream&, const ViewportConfiguration::Parameters&);
} // namespace WebCore
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