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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 "DisabledAdaptations.h"
#include "FloatSize.h"
#include "IntSize.h"
#include "ViewportArguments.h"
#include <wtf/Noncopyable.h>
#include <wtf/OptionSet.h>
#include <wtf/TZoneMalloc.h>
namespace WTF {
class TextStream;
}
namespace WebCore {
class ViewportConfiguration {
WTF_MAKE_TZONE_ALLOCATED(ViewportConfiguration);
WTF_MAKE_NONCOPYABLE(ViewportConfiguration);
public:
// FIXME: unify with ViewportArguments.
struct Parameters {
double width { 0 };
double height { 0 };
double initialScale { 0 };
double initialScaleIgnoringLayoutScaleFactor { 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 };
bool ignoreInitialScaleForLayoutWidth { false };
bool shouldHonorMinimumEffectiveDeviceWidthFromClient { true };
friend bool operator==(const Parameters&, const Parameters&) = default;
};
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& viewLayoutSize() const { return m_viewLayoutSize; }
const FloatSize& minimumLayoutSize() const { return m_minimumLayoutSize; }
WEBCORE_EXPORT bool setViewLayoutSize(const FloatSize&, std::optional<double>&& scaleFactor = std::nullopt, std::optional<double>&& effectiveWidth = std::nullopt);
const OptionSet<DisabledAdaptations>& disabledAdaptations() const { return m_disabledAdaptations; }
WEBCORE_EXPORT bool setDisabledAdaptations(const OptionSet<DisabledAdaptations>&);
const ViewportArguments& viewportArguments() const { return m_viewportArguments; }
WEBCORE_EXPORT bool setViewportArguments(const ViewportArguments&);
WEBCORE_EXPORT bool setCanIgnoreScalingConstraints(bool);
constexpr bool canIgnoreScalingConstraints() const { return m_canIgnoreScalingConstraints; }
WEBCORE_EXPORT bool setMinimumEffectiveDeviceWidthWhenIgnoringScalingConstraints(double);
WEBCORE_EXPORT bool setMinimumEffectiveDeviceWidthForShrinkToFit(double);
constexpr double minimumEffectiveDeviceWidth() const
{
double minimumEffectiveDeviceWidth = m_minimumEffectiveDeviceWidthForView;
if (!shouldIgnoreMinimumEffectiveDeviceWidthForShrinkToFit())
minimumEffectiveDeviceWidth = std::max(minimumEffectiveDeviceWidth, m_canIgnoreScalingConstraints ? m_minimumEffectiveDeviceWidthWhenIgnoringScalingConstraints : m_minimumEffectiveDeviceWidthForShrinkToFit);
return minimumEffectiveDeviceWidth;
}
constexpr bool isKnownToLayOutWiderThanViewport() const { return m_isKnownToLayOutWiderThanViewport; }
WEBCORE_EXPORT bool setIsKnownToLayOutWiderThanViewport(bool value);
constexpr bool shouldIgnoreMinimumEffectiveDeviceWidthForShrinkToFit() const
{
if (shouldShrinkToFitMinimumEffectiveDeviceWidthWhenIgnoringScalingConstraints())
return false;
if (m_canIgnoreScalingConstraints)
return true;
if (m_viewportArguments == ViewportArguments())
return false;
if ((m_viewportArguments.zoom == 1. || m_viewportArguments.width == ViewportArguments::ValueDeviceWidth) && !m_isKnownToLayOutWiderThanViewport)
return true;
return false;
}
constexpr bool shouldShrinkToFitMinimumEffectiveDeviceWidthWhenIgnoringScalingConstraints() const
{
return m_canIgnoreScalingConstraints && m_minimumEffectiveDeviceWidthWhenIgnoringScalingConstraints;
}
void setForceAlwaysUserScalable(bool forceAlwaysUserScalable) { m_forceAlwaysUserScalable = forceAlwaysUserScalable; }
double layoutSizeScaleFactor() const { return m_layoutSizeScaleFactor; }
void setPrefersHorizontalScrollingBelowDesktopViewportWidths(bool value) { m_prefersHorizontalScrollingBelowDesktopViewportWidths = value; }
void setCanIgnoreViewportArgumentsToAvoidExcessiveZoom(bool value) { m_canIgnoreViewportArgumentsToAvoidExcessiveZoom = value; }
WEBCORE_EXPORT IntSize layoutSize() const;
WEBCORE_EXPORT int layoutWidth() const;
WEBCORE_EXPORT int layoutHeight() 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 avoidsUnsafeArea() const { return m_configuration.avoidsUnsafeArea; }
// Matches a width=device-width, initial-scale=1 viewport.
WEBCORE_EXPORT Parameters nativeWebpageParameters();
static Parameters nativeWebpageParametersWithoutShrinkToFit();
static Parameters nativeWebpageParametersWithShrinkToFit();
#if ENABLE(PDF_PLUGIN)
WEBCORE_EXPORT static Parameters pluginDocumentParameters();
#endif
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();
String description() const;
#if !LOG_DISABLED
WEBCORE_EXPORT void dump() const;
#endif
private:
void updateConfiguration();
double viewportArgumentsLength(double length) const;
double initialScaleFromSize(double width, double height, bool shouldIgnoreScalingConstraints) const;
bool shouldOverrideDeviceWidthAndShrinkToFit() const;
bool shouldIgnoreScalingConstraintsRegardlessOfContentSize() const;
bool shouldIgnoreScalingConstraints() const;
bool shouldIgnoreVerticalScalingConstraints() const;
bool shouldIgnoreHorizontalScalingConstraints() const;
void updateDefaultConfiguration();
bool canOverrideConfigurationParameters() const;
constexpr bool layoutSizeIsExplicitlyScaled() const
{
return m_layoutSizeScaleFactor != 1;
}
constexpr double forceAlwaysUserScalableMaximumScale() const
{
const double forceAlwaysUserScalableMaximumScaleIgnoringLayoutScaleFactor = 5;
return std::max(m_configuration.maximumScale, forceAlwaysUserScalableMaximumScaleIgnoringLayoutScaleFactor) * effectiveLayoutSizeScaleFactor();
}
constexpr double forceAlwaysUserScalableMinimumScale() const
{
const double forceAlwaysUserScalableMinimumScaleIgnoringLayoutScaleFactor = 1;
return std::min(m_configuration.minimumScale, forceAlwaysUserScalableMinimumScaleIgnoringLayoutScaleFactor) * effectiveLayoutSizeScaleFactor();
}
constexpr double effectiveLayoutSizeScaleFactor() const
{
if (!m_viewLayoutSize.width() || !minimumEffectiveDeviceWidth())
return m_layoutSizeScaleFactor;
return m_layoutSizeScaleFactor * m_viewLayoutSize.width() / std::max<double>(minimumEffectiveDeviceWidth(), m_viewLayoutSize.width());
}
void updateMinimumLayoutSize();
Parameters m_configuration;
Parameters m_defaultConfiguration;
IntSize m_contentSize;
FloatSize m_minimumLayoutSize;
FloatSize m_viewLayoutSize;
ViewportArguments m_viewportArguments;
OptionSet<DisabledAdaptations> m_disabledAdaptations;
double m_layoutSizeScaleFactor { 1 };
double m_minimumEffectiveDeviceWidthForView { 0 };
double m_minimumEffectiveDeviceWidthForShrinkToFit { 0 };
double m_minimumEffectiveDeviceWidthWhenIgnoringScalingConstraints { 0 };
bool m_canIgnoreScalingConstraints;
bool m_forceAlwaysUserScalable;
bool m_isKnownToLayOutWiderThanViewport { false };
bool m_prefersHorizontalScrollingBelowDesktopViewportWidths { false };
bool m_canIgnoreViewportArgumentsToAvoidExcessiveZoom { false };
bool m_minimumEffectiveDeviceWidthWasSetByClient { false };
};
WTF::TextStream& operator<<(WTF::TextStream&, const ViewportConfiguration::Parameters&);
WTF::TextStream& operator<<(WTF::TextStream&, const ViewportConfiguration&);
} // namespace WebCore
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