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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
*
* 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_PLATFORM_TRANSFORMS_TRANSFORM_OPERATIONS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TRANSFORMS_TRANSFORM_OPERATIONS_H_
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/transforms/transform_operation.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "ui/gfx/geometry/size_f.h"
namespace gfx {
class BoxF;
}
namespace blink {
class PLATFORM_EXPORT EmptyTransformOperations final {
DISALLOW_NEW();
};
class PLATFORM_EXPORT TransformOperations {
DISALLOW_NEW();
public:
TransformOperations() = default;
TransformOperations(const EmptyTransformOperations&) {}
void Trace(Visitor* visitor) const { visitor->Trace(operations_); }
bool operator==(const TransformOperations& o) const;
bool operator!=(const TransformOperations& o) const { return !(*this == o); }
// Constructs a transformation matrix from the operations. The parameter
// |border_box_size| is used when computing styles that are size-dependent.
void Apply(const gfx::SizeF& border_box_size, gfx::Transform& t) const {
for (auto& operation : operations_)
operation->Apply(t, border_box_size);
}
// Constructs a transformation matrix from the operations starting from index
// |start|. This process facilitates mixing pairwise operations for a common
// prefix and matrix interpolation for the remainder. The parameter
// |border_box_size| is used when computing styles that are size-dependent.
void ApplyRemaining(const gfx::SizeF& border_box_size,
wtf_size_t start,
gfx::Transform& t) const;
// Return true if any of the operation types are 3D operation types (even if
// the values describe affine transforms)
bool Has3DOperation() const {
for (auto& operation : operations_)
if (operation->Is3DOperation())
return true;
return false;
}
// Return true if any of the operation types are non-perspective 3D operation
// types (even if the values describe affine transforms).
bool HasNonPerspective3DOperation() const {
for (auto& operation : operations_) {
if (operation->Is3DOperation() &&
operation->GetType() != TransformOperation::kPerspective)
return true;
}
return false;
}
bool PreservesAxisAlignment() const {
for (auto& operation : operations_) {
if (!operation->PreservesAxisAlignment())
return false;
}
return true;
}
bool IsIdentityOrTranslation() const {
for (auto& operation : operations_) {
if (!operation->IsIdentityOrTranslation())
return false;
}
return true;
}
// Returns true if any operation has a non-trivial component in the Z axis.
bool HasNonTrivial3DComponent() const {
for (auto& operation : operations_) {
if (operation->HasNonTrivial3DComponent())
return true;
}
return false;
}
// Returns true if any operation is perspective.
bool HasPerspective() const {
for (auto& operation : operations_) {
if (operation->GetType() == TransformOperation::kPerspective)
return true;
}
return false;
}
TransformOperation::BoxSizeDependency BoxSizeDependencies(
wtf_size_t start = 0) const;
wtf_size_t MatchingPrefixLength(const TransformOperations&) const;
void clear() { operations_.clear(); }
HeapVector<Member<TransformOperation>, 2>& Operations() {
return operations_;
}
const HeapVector<Member<TransformOperation>, 2>& Operations() const {
return operations_;
}
wtf_size_t size() const { return operations_.size(); }
const TransformOperation* at(wtf_size_t index) const {
return index < operations_.size() ? operations_.at(index).Get() : nullptr;
}
bool BlendedBoundsForBox(const gfx::BoxF&,
const TransformOperations& from,
const double& min_progress,
const double& max_progress,
gfx::BoxF* bounds) const;
// Registered custom property interpolations cannot currently represent
// interpolated values if functions need to be combined into a matrix and
// those function values depend on the box size via percentage values, since
// percentages need to be converted into numbers and the percentages should
// be kept for the computed value. Until there is a standardized mix()
// function for representing such transform values, make such interpolations
// discrete with BoxSizeDependentMatrixBlending::kDisallow.
//
// The standard CSS transform property still allows such interpolations, but
// the computed value in typed-om incorrectly returns values with percentages
// resolved in this case. getComputedStyle().transform returns a resolved
// value per spec.
enum class BoxSizeDependentMatrixBlending {
kAllow,
kDisallow,
};
TransformOperation* BlendRemainingByUsingMatrixInterpolation(
const TransformOperations& from,
wtf_size_t matching_prefix_length,
double progress,
BoxSizeDependentMatrixBlending box_size_dependent =
BoxSizeDependentMatrixBlending::kAllow) const;
TransformOperations Blend(const TransformOperations& from,
double progress,
BoxSizeDependentMatrixBlending box_size_dependent =
BoxSizeDependentMatrixBlending::kAllow) const;
TransformOperations Add(const TransformOperations& addend) const;
TransformOperations Zoom(double factor) const;
// Perform accumulation of |to| onto |this|, as specified in
// https://drafts.csswg.org/css-transforms-2/#combining-transform-lists
TransformOperations Accumulate(const TransformOperations& to) const;
private:
HeapVector<Member<TransformOperation>, 2> operations_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TRANSFORMS_TRANSFORM_OPERATIONS_H_
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