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// Copyright 2019 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/cssom/cobalt_ui_nav_focus_transform_function.h"
#include "base/strings/stringprintf.h"
#include "cobalt/cssom/transform_function_visitor.h"
#include "cobalt/math/matrix_interpolation.h"
namespace cobalt {
namespace cssom {
CobaltUiNavFocusTransformFunction::CobaltUiNavFocusTransformFunction(
float x_translation_scale, float y_translation_scale,
float progress_to_identity)
: x_translation_scale_(x_translation_scale),
y_translation_scale_(y_translation_scale),
progress_to_identity_(progress_to_identity) {
traits_ = kTraitIsDynamic | kTraitUsesUiNavFocus;
}
void CobaltUiNavFocusTransformFunction::Accept(
TransformFunctionVisitor* visitor) const {
visitor->VisitCobaltUiNavFocusTransform(this);
}
std::string CobaltUiNavFocusTransformFunction::ToString() const {
return base::StringPrintf("-cobalt-ui-nav-focus-transform(%.7g, %.7g)",
x_translation_scale_, y_translation_scale_);
}
math::Matrix3F CobaltUiNavFocusTransformFunction::ToMatrix(
const math::SizeF& used_size,
const scoped_refptr<ui_navigation::NavItem>& used_ui_nav_focus) const {
ui_navigation::NativeMatrix4 matrix;
if (used_ui_nav_focus && used_ui_nav_focus->GetFocusTransform(&matrix)) {
return math::InterpolateMatrices(
math::Matrix3F::FromValues(
// Since the UI is only rendered in 2D, ignore any scaling or
// shearing that might be part of a 3D transform.
1.0f, 0.0f, matrix.m[3] * x_translation_scale_, 0.0f, 1.0f,
matrix.m[7] * y_translation_scale_, 0.0f, 0.0f, 1.0f),
math::Matrix3F::Identity(), progress_to_identity_);
}
return math::Matrix3F::Identity();
}
} // namespace cssom
} // namespace cobalt