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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2008 Torch Mobile Inc. All rights reserved.
* (http://www.torchmobile.com/)
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2012-2013 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_VIEWPORT_DESCRIPTION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_VIEWPORT_DESCRIPTION_H_
#include "base/optional.h"
#include "third_party/blink/public/mojom/page/display_cutout.mojom-blink.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/frame/page_scale_constraints.h"
#include "third_party/blink/renderer/platform/geometry/float_size.h"
#include "third_party/blink/renderer/platform/geometry/length.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
class LocalFrame;
struct CORE_EXPORT ViewportDescription {
DISALLOW_NEW();
enum Type {
// These are ordered in increasing importance.
kUserAgentStyleSheet,
kHandheldFriendlyMeta,
kMobileOptimizedMeta,
kViewportMeta,
kAuthorStyleSheet
} type;
// Enums used to record the kind of viewport in the Viewport.MetaTagType
// histogram. These must match the enums in histograms.xml and existing
// entries must not be changed.
enum class ViewportUMAType : int {
kNoViewportTag = 0,
kDeviceWidth = 1,
kConstantWidth = 2,
kMetaWidthOther = 3,
kMetaHandheldFriendly = 4,
kMetaMobileOptimized = 5,
kXhtmlMobileProfile = 6,
kTypeCount = 7
};
constexpr static float kValueAuto = -1.;
constexpr static float kValueDeviceWidth = -2.;
constexpr static float kValueDeviceHeight = -3.;
constexpr static float kValuePortrait = -4.;
constexpr static float kValueLandscape = -5.;
constexpr static float kValueDeviceDPI = -6.;
constexpr static float kValueLowDPI = -7.;
constexpr static float kValueMediumDPI = -8.;
constexpr static float kValueHighDPI = -9.;
constexpr static float kValueExtendToZoom = -10.;
ViewportDescription(Type type = kUserAgentStyleSheet)
: type(type),
zoom(kValueAuto),
min_zoom(kValueAuto),
max_zoom(kValueAuto),
user_zoom(true),
orientation(kValueAuto),
deprecated_target_density_dpi(kValueAuto),
zoom_is_explicit(false),
min_zoom_is_explicit(false),
max_zoom_is_explicit(false),
user_zoom_is_explicit(false) {}
// All arguments are in CSS units.
PageScaleConstraints Resolve(const FloatSize& initial_viewport_size,
const Length& legacy_fallback_width) const;
// When --use-zoom-for-dsf is enabled, if the type is kFixed, these Length
// values (i.e., |min_width|, |max_width|, |min_height|, and |max_height|)
// must be in physical pixel scale. When --use-zoom-for-dsf is disabled, if
// the type is kFixed, these Length values must be in DIP scale.
Length min_width;
Length max_width;
Length min_height;
Length max_height;
float zoom;
float min_zoom;
float max_zoom;
bool user_zoom;
float orientation;
float deprecated_target_density_dpi; // Only used for Android WebView
// Whether the computed value was explicitly specified rather than being
// inferred.
bool zoom_is_explicit;
bool min_zoom_is_explicit;
bool max_zoom_is_explicit;
bool user_zoom_is_explicit;
mojom::ViewportFit GetViewportFit() const {
return viewport_fit_.value_or(mojom::ViewportFit::kAuto);
}
void SetViewportFit(mojom::ViewportFit value) { viewport_fit_ = value; }
bool operator==(const ViewportDescription& other) const {
// Used for figuring out whether to reset the viewport or not,
// thus we are not taking type into account.
return min_width == other.min_width && max_width == other.max_width &&
min_height == other.min_height && max_height == other.max_height &&
zoom == other.zoom && min_zoom == other.min_zoom &&
max_zoom == other.max_zoom && user_zoom == other.user_zoom &&
orientation == other.orientation &&
deprecated_target_density_dpi ==
other.deprecated_target_density_dpi &&
zoom_is_explicit == other.zoom_is_explicit &&
min_zoom_is_explicit == other.min_zoom_is_explicit &&
max_zoom_is_explicit == other.max_zoom_is_explicit &&
user_zoom_is_explicit == other.user_zoom_is_explicit &&
viewport_fit_ == other.viewport_fit_;
}
bool operator!=(const ViewportDescription& other) const {
return !(*this == other);
}
bool IsLegacyViewportType() const {
return type >= kHandheldFriendlyMeta && type <= kViewportMeta;
}
bool IsMetaViewportType() const { return type == kViewportMeta; }
bool IsSpecifiedByAuthor() const { return type != kUserAgentStyleSheet; }
// Reports UMA stat on whether the page is considered mobile or desktop and
// what kind of mobile it is. Applies only to Android, must only be called
// once per page load.
void ReportMobilePageStats(const LocalFrame*) const;
private:
enum Direction { kHorizontal, kVertical };
static float ResolveViewportLength(const Length&,
const FloatSize& initial_viewport_size,
Direction);
// Optional is used to identify if |viewport_fit_| has been explicitly set.
// This is because a Document will have multiple ViewportDescriptions are
// which one that will be used is dependent on whether any values have been
// explicitly set.
base::Optional<mojom::ViewportFit> viewport_fit_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_VIEWPORT_DESCRIPTION_H_
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