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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/ambient/ui/ambient_animation_resizer.h"
#include "base/check.h"
#include "base/logging.h"
#include "base/numerics/safe_conversions.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/lottie/animation.h"
#include "ui/views/controls/animated_image_view.h"
namespace ash {
// static
void AmbientAnimationResizer::Resize(
views::AnimatedImageView& animated_image_view,
int padding_for_jitter) {
DCHECK(animated_image_view.animated_image());
DCHECK_GE(padding_for_jitter, 0);
gfx::Size animation_size =
animated_image_view.animated_image()->GetOriginalSize();
DCHECK(!animation_size.IsEmpty());
gfx::Rect destination_bounds = animated_image_view.GetContentsBounds();
destination_bounds.Outset(padding_for_jitter);
DCHECK(!destination_bounds.IsEmpty());
gfx::Size animation_resized;
float width_scale_factor =
static_cast<float>(destination_bounds.width()) / animation_size.width();
animation_resized.set_width(destination_bounds.width());
// TODO(esum): Add metrics for the number of times the new scaled height
// is less than the destination height. UX did not intend for this to
// happen, so it's worth recording.
animation_resized.set_height(
base::ClampRound(animation_size.height() * width_scale_factor));
animated_image_view.SetVerticalAlignment(
views::ImageViewBase::Alignment::kCenter);
animated_image_view.SetHorizontalAlignment(
views::ImageViewBase::Alignment::kCenter);
// The animation's new scaled size has been computed above.
// AnimatedImageView::SetImageSize() takes care of both a) applying the
// scaled size and b) cropping by translating the canvas before painting such
// that the rescaled animation's origin resides outside the boundaries of the
// view. The portions of the rescaled animation that reside outside of the
// view's boundaries ultimately get cropped.
animated_image_view.SetImageSize(animation_resized);
}
} // namespace ash
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