153 lines
5.0 KiB
C++
153 lines
5.0 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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* Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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* Copyright (C) 2012 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#pragma once
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#include "FloatSize.h"
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#include <wtf/Forward.h>
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namespace WebCore {
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class Document;
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enum ViewportErrorCode {
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UnrecognizedViewportArgumentKeyError,
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UnrecognizedViewportArgumentValueError,
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TruncatedViewportArgumentValueError,
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MaximumScaleTooLargeError
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};
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enum class ViewportFit {
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Auto,
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Contain,
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Cover
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};
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struct ViewportAttributes {
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FloatSize layoutSize;
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float initialScale;
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float minimumScale;
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float maximumScale;
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float userScalable;
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float orientation;
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float shrinkToFit;
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ViewportFit viewportFit;
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};
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struct ViewportArguments {
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enum Type {
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// These are ordered in increasing importance.
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Implicit,
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#if PLATFORM(IOS_FAMILY)
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PluginDocument,
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ImageDocument,
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#endif
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ViewportMeta,
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CSSDeviceAdaptation
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} type;
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enum {
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ValueAuto = -1,
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ValueDeviceWidth = -2,
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ValueDeviceHeight = -3,
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ValuePortrait = -4,
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ValueLandscape = -5
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};
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explicit ViewportArguments(Type type = Implicit)
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: type(type)
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{
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}
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// All arguments are in CSS units.
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ViewportAttributes resolve(const FloatSize& initialViewportSize, const FloatSize& deviceSize, int defaultWidth) const;
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float width { ValueAuto };
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float minWidth { ValueAuto };
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float maxWidth { ValueAuto };
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float height { ValueAuto };
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float minHeight { ValueAuto };
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float maxHeight { ValueAuto };
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float zoom { ValueAuto };
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float minZoom { ValueAuto };
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float maxZoom { ValueAuto };
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float userZoom { ValueAuto };
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float orientation { ValueAuto };
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float shrinkToFit { ValueAuto };
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ViewportFit viewportFit { ViewportFit::Auto };
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bool widthWasExplicit { false };
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bool operator==(const ViewportArguments& other) const
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{
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// Used for figuring out whether to reset the viewport or not,
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// thus we are not taking type into account.
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return width == other.width
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&& minWidth == other.minWidth
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&& maxWidth == other.maxWidth
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&& height == other.height
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&& minHeight == other.minHeight
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&& maxHeight == other.maxHeight
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&& zoom == other.zoom
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&& minZoom == other.minZoom
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&& maxZoom == other.maxZoom
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&& userZoom == other.userZoom
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&& orientation == other.orientation
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&& shrinkToFit == other.shrinkToFit
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&& viewportFit == other.viewportFit
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&& widthWasExplicit == other.widthWasExplicit;
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}
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bool operator!=(const ViewportArguments& other) const
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{
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return !(*this == other);
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}
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#if PLATFORM(GTK)
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// FIXME: We're going to keep this constant around until all embedders
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// refactor their code to no longer need it.
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static const float deprecatedTargetDPI;
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#endif
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};
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WEBCORE_EXPORT ViewportAttributes computeViewportAttributes(ViewportArguments args, int desktopWidth, int deviceWidth, int deviceHeight, float devicePixelRatio, IntSize visibleViewport);
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WEBCORE_EXPORT void restrictMinimumScaleFactorToViewportSize(ViewportAttributes& result, IntSize visibleViewport, float devicePixelRatio);
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WEBCORE_EXPORT void restrictScaleFactorToInitialScaleIfNotUserScalable(ViewportAttributes& result);
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WEBCORE_EXPORT float computeMinimumScaleFactorForContentContained(const ViewportAttributes& result, const IntSize& viewportSize, const IntSize& contentSize);
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typedef WTF::Function<void(ViewportErrorCode, const String&)> ViewportErrorHandler;
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void setViewportFeature(ViewportArguments&, Document&, StringView key, StringView value);
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WEBCORE_EXPORT void setViewportFeature(ViewportArguments&, StringView key, StringView value, bool viewportFitEnabled, const ViewportErrorHandler&);
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WTF::TextStream& operator<<(WTF::TextStream&, const ViewportArguments&);
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} // namespace WebCore
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