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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/style/system_shadow_on_texture_layer.h"
#include "ash/style/style_util.h"
#include "ui/color/color_provider.h"
#include "ui/compositor/paint_recorder.h"
#include "ui/gfx/skia_paint_util.h"
namespace ash {
SystemShadowOnTextureLayer::SystemShadowOnTextureLayer(SystemShadow::Type type)
: type_(type),
shadow_values_(gfx::ShadowValue::MakeChromeOSSystemUIShadowValues(
SystemShadow::GetElevationFromType(type))) {
layer_.SetName("SystemShadow");
layer_.SetFillsBoundsOpaquely(false);
layer_.set_delegate(this);
layer_.SetBounds(GetLayerBounds());
}
SystemShadowOnTextureLayer::~SystemShadowOnTextureLayer() = default;
void SystemShadowOnTextureLayer::SetType(SystemShadow::Type type) {
type_ = type;
UpdateShadowValues();
UpdateLayer();
}
void SystemShadowOnTextureLayer::SetContentBounds(const gfx::Rect& bounds) {
content_bounds_ = bounds;
layer_.SetBounds(GetLayerBounds());
UpdateLayer();
}
void SystemShadowOnTextureLayer::SetRoundedCornerRadius(int corner_radius) {
SetRoundedCorners(gfx::RoundedCornersF(corner_radius));
}
void SystemShadowOnTextureLayer::SetRoundedCorners(
const gfx::RoundedCornersF& rounded_corners) {
if (rounded_corners_ == rounded_corners) {
return;
}
rounded_corners_ = rounded_corners;
UpdateLayer();
}
const gfx::Rect& SystemShadowOnTextureLayer::GetContentBounds() {
return content_bounds_;
}
ui::Layer* SystemShadowOnTextureLayer::GetLayer() {
return &layer_;
}
ui::Layer* SystemShadowOnTextureLayer::GetNinePatchLayer() {
return nullptr;
}
gfx::Rect SystemShadowOnTextureLayer::GetLayerBounds() const {
gfx::Rect layer_bounds = content_bounds_;
layer_bounds.Inset(gfx::ShadowValue::GetMargin(shadow_values_));
return layer_bounds;
}
const gfx::ShadowValues SystemShadowOnTextureLayer::GetShadowValuesForTesting()
const {
return shadow_values_;
}
void SystemShadowOnTextureLayer::UpdateLayer() {
layer_.SchedulePaint(GetLayerBounds());
}
void SystemShadowOnTextureLayer::UpdateShadowValues() {
const int elevation = SystemShadow::GetElevationFromType(type_);
auto iter = colors_map_.find(elevation);
if (iter == colors_map_.end()) {
shadow_values_ =
gfx::ShadowValue::MakeChromeOSSystemUIShadowValues(elevation);
} else {
shadow_values_ = gfx::ShadowValue::MakeChromeOSSystemUIShadowValues(
elevation, /*key_shadow_color=*/iter->second.first,
/*second_color=*/iter->second.second);
}
}
void SystemShadowOnTextureLayer::OnPaintLayer(const ui::PaintContext& context) {
// Create a rounded rect of content area.
const gfx::Rect r_rect_bounds =
content_bounds_ - GetLayerBounds().OffsetFromOrigin();
SkRRect r_rect;
float upper_left = rounded_corners_.upper_left();
float upper_right = rounded_corners_.upper_right();
float lower_right = rounded_corners_.lower_right();
float lower_left = rounded_corners_.lower_left();
SkVector radii[4] = {{upper_left, upper_left},
{upper_right, upper_right},
{lower_right, lower_right},
{lower_left, lower_left}};
r_rect.setRectRadii(gfx::RectToSkRect(r_rect_bounds), radii);
// Clip out the center.
ui::PaintRecorder recorder(context, content_bounds_.size());
recorder.canvas()->sk_canvas()->clipRRect(r_rect, SkClipOp::kDifference,
true);
// Paint shadow.
cc::PaintFlags shadow_flags;
shadow_flags.setAntiAlias(true);
shadow_flags.setLooper(gfx::CreateShadowDrawLooper(shadow_values_));
// Due to anti alias, we should fill transparent color to the rounded corner
// area.
shadow_flags.setColor(SK_ColorTRANSPARENT);
recorder.canvas()->sk_canvas()->drawRRect(r_rect, shadow_flags);
}
void SystemShadowOnTextureLayer::OnDeviceScaleFactorChanged(
float old_device_scale_factor,
float new_device_scale_factor) {}
void SystemShadowOnTextureLayer::UpdateShadowColors(
const ui::ColorProvider* color_provider) {
colors_map_ = StyleUtil::CreateShadowElevationToColorsMap(color_provider);
UpdateShadowValues();
UpdateLayer();
}
} // namespace ash
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