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// Copyright 2023 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/system/toast/system_toast_view.h"
#include <string>
#include <string_view>
#include <utility>
#include "ash/public/cpp/ash_view_ids.h"
#include "ash/public/cpp/style/color_provider.h"
#include "ash/shell.h"
#include "ash/style/ash_color_id.h"
#include "ash/style/icon_button.h"
#include "ash/style/pill_button.h"
#include "ash/style/system_shadow.h"
#include "ash/style/typography.h"
#include "base/check.h"
#include "chromeos/constants/chromeos_features.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/chromeos/styles/cros_tokens_color_mappings.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/vector_icon_types.h"
#include "ui/views/background.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/label.h"
#include "ui/views/highlight_border.h"
#include "ui/views/view_class_properties.h"
namespace ash {
namespace {
// Margin constants
constexpr gfx::Insets kToastInteriorMargin = gfx::Insets::VH(8, 16);
constexpr gfx::Insets kMultilineToastInteriorMargin = gfx::Insets::VH(8, 24);
constexpr gfx::Insets kToastWithTextButtonInteriorMargin =
gfx::Insets::TLBR(2, 16, 2, 2);
constexpr gfx::Insets kMultilineToastWithTextButtonInteriorMargin =
gfx::Insets::TLBR(8, 24, 8, 12);
// Contents constants
constexpr int kToastLabelMaxWidth = 512;
constexpr int kToastLeadingIconSize = 20;
constexpr int kToastLeadingIconPaddingWidth = 14;
constexpr int kTextButtonFocusRingHaloInset = 1;
// Padding to add space between the toast's body text and icon button.
constexpr gfx::Insets kToastIconButtonLeftPadding =
gfx::Insets::TLBR(0, 14, 0, 0);
} // namespace
SystemToastView::SystemToastView(const std::u16string& text,
ButtonType button_type,
const std::u16string& button_text,
const gfx::VectorIcon* button_icon,
base::RepeatingClosure button_callback,
const gfx::VectorIcon* leading_icon) {
// Paint to layer so the background can be transparent.
SetPaintToLayer();
if (chromeos::features::IsSystemBlurEnabled()) {
layer()->SetFillsBoundsOpaquely(false);
layer()->SetBackgroundBlur(ColorProvider::kBackgroundBlurSigma);
layer()->SetBackdropFilterQuality(ColorProvider::kBackgroundBlurQuality);
}
const ui::ColorId background_color_id =
chromeos::features::IsSystemBlurEnabled()
? static_cast<ui::ColorId>(kColorAshShieldAndBase80)
: cros_tokens::kCrosSysSystemBaseElevatedOpaque;
SetBackground(views::CreateSolidBackground(background_color_id));
SetOrientation(views::LayoutOrientation::kHorizontal);
SetCrossAxisAlignment(views::LayoutAlignment::kCenter);
if (!leading_icon->is_empty()) {
AddChildView(views::Builder<views::ImageView>()
.SetID(VIEW_ID_TOAST_IMAGE_VIEW)
.SetPreferredSize(gfx::Size(kToastLeadingIconSize,
kToastLeadingIconSize))
.SetImage(ui::ImageModel::FromVectorIcon(
*leading_icon, cros_tokens::kCrosSysOnSurface))
.Build());
auto* icon_padding = AddChildView(std::make_unique<views::View>());
icon_padding->SetPreferredSize(
gfx::Size(kToastLeadingIconPaddingWidth, kToastLeadingIconSize));
}
AddChildView(
views::Builder<views::Label>()
.CopyAddressTo(&label_)
.SetID(VIEW_ID_TOAST_LABEL)
.SetText(text)
.SetTooltipText(text)
.SetHorizontalAlignment(gfx::ALIGN_LEFT)
.SetEnabledColor(cros_tokens::kCrosSysOnSurface)
.SetAutoColorReadabilityEnabled(false)
.SetSubpixelRenderingEnabled(false)
.SetFontList(TypographyProvider::Get()->ResolveTypographyToken(
TypographyToken::kCrosBody2))
.SetMultiLine(true)
.SetMaximumWidth(kToastLabelMaxWidth)
.SetMaxLines(2)
.SetProperty(views::kFlexBehaviorKey,
views::FlexSpecification(
views::LayoutOrientation::kHorizontal,
views::MinimumFlexSizeRule::kScaleToZero,
views::MaximumFlexSizeRule::kScaleToMaximum))
.Build());
switch (button_type) {
case ButtonType::kNone:
CHECK(button_text.empty());
CHECK(button_icon->is_empty());
break;
case ButtonType::kTextButton: {
CHECK(!button_text.empty());
AddChildView(
views::Builder<PillButton>()
.CopyAddressTo(&button_)
.SetID(VIEW_ID_TOAST_BUTTON)
.SetCallback(std::move(button_callback))
.SetText(button_text)
.SetTooltipText(button_text)
.SetPillButtonType(PillButton::Type::kAccentFloatingWithoutIcon)
.SetFocusBehavior(views::View::FocusBehavior::ALWAYS)
.Build());
auto* button_focus_ring = views::FocusRing::Get(button_);
button_focus_ring->SetHaloInset(kTextButtonFocusRingHaloInset);
button_focus_ring->SetOutsetFocusRingDisabled(true);
break;
}
case ButtonType::kIconButton: {
CHECK(!button_text.empty());
CHECK(!button_icon->is_empty());
auto* icon_button =
AddChildView(IconButton::Builder()
.SetViewId(VIEW_ID_TOAST_BUTTON)
.SetType(IconButton::Type::kSmallFloating)
.SetVectorIcon(button_icon)
.SetCallback(std::move(button_callback))
.SetAccessibleName(button_text)
.Build());
icon_button->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
icon_button->SetIconColor(cros_tokens::kCrosSysPrimary);
icon_button->SetProperty(views::kMarginsKey, kToastIconButtonLeftPadding);
button_ = icon_button;
break;
}
}
// Need to size label to get the required number of lines.
label_->SizeToPreferredSize();
const bool has_text_button = button_type == ButtonType::kTextButton;
SetInteriorMargin(label_->GetRequiredLines() > 1
? has_text_button
? kMultilineToastWithTextButtonInteriorMargin
: kMultilineToastInteriorMargin
: has_text_button ? kToastWithTextButtonInteriorMargin
: kToastInteriorMargin);
const int rounded_corner_radius = GetPreferredSize().height() / 2;
layer()->SetRoundedCornerRadius(gfx::RoundedCornersF(rounded_corner_radius));
SetBorder(std::make_unique<views::HighlightBorder>(
rounded_corner_radius,
views::HighlightBorder::Type::kHighlightBorderOnShadow));
// Since toasts have a large corner radius, we use the shadow on texture
// layer. Refer to `ash::SystemShadowOnTextureLayer` for more details.
shadow_ =
SystemShadow::CreateShadowOnTextureLayer(SystemShadow::Type::kElevation4);
shadow_->SetRoundedCornerRadius(rounded_corner_radius);
SetProperty(views::kElementIdentifierKey, kSystemToastViewElementId);
}
SystemToastView::~SystemToastView() = default;
void SystemToastView::SetText(std::u16string_view text) {
label_->SetText(text);
}
std::u16string_view SystemToastView::GetText() const {
return label_->GetText();
}
void SystemToastView::AddedToWidget() {
shadow_->ObserveColorProviderSource(GetWidget());
// Attach the shadow at the bottom of the widget so it shows behind the view.
auto* shadow_layer = shadow_->GetLayer();
auto* widget_layer = GetWidget()->GetLayer();
widget_layer->Add(shadow_layer);
widget_layer->StackAtBottom(shadow_layer);
}
void SystemToastView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
// `shadow_` should have the same bounds as the view's layer.
shadow_->SetContentBounds(layer()->bounds());
}
DEFINE_CLASS_ELEMENT_IDENTIFIER_VALUE(SystemToastView,
kSystemToastViewElementId);
BEGIN_METADATA(SystemToastView)
END_METADATA
} // namespace ash
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