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// Copyright 2018 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/assistant/ui/base/assistant_button.h"
#include "ash/assistant/model/assistant_ui_model.h"
#include "ash/assistant/ui/base/assistant_button_listener.h"
#include "ash/assistant/util/histogram_util.h"
#include "ash/constants/ash_features.h"
#include "ash/public/cpp/assistant/controller/assistant_ui_controller.h"
#include "ash/style/ash_color_id.h"
#include "ash/style/style_util.h"
#include "base/functional/bind.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/color/color_provider.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/color_palette.h"
#include "ui/gfx/color_utils.h"
#include "ui/gfx/paint_vector_icon.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/animation/ink_drop.h"
#include "ui/views/controls/highlight_path_generator.h"
#include "ui/views/view.h"
namespace ash {
namespace {
// Appearance.
constexpr int kFocusRingStrokeWidth = 2;
constexpr int kInkDropInset = 2;
} // namespace
// AssistantButton::InitParams -------------------------------------------------
AssistantButton::InitParams::InitParams() = default;
AssistantButton::InitParams::InitParams(InitParams&&) = default;
AssistantButton::InitParams::~InitParams() = default;
// AssistantButton -------------------------------------------------------------
AssistantButton::AssistantButton(AssistantButtonListener* listener,
AssistantButtonId button_id)
: views::ImageButton(base::BindRepeating(&AssistantButton::OnButtonPressed,
base::Unretained(this))),
listener_(listener),
id_(button_id) {
// Avoid drawing default focus ring and draw customized focus instead.
SetInstallFocusRingOnFocus(false);
SetFocusBehavior(FocusBehavior::ALWAYS);
// Inkdrop only on click.
views::InkDrop::Get(this)->SetMode(views::InkDropHost::InkDropMode::ON);
SetHasInkDropActionOnClick(true);
views::InkDrop::UseInkDropForFloodFillRipple(views::InkDrop::Get(this),
/*highlight_on_hover=*/false);
views::InstallCircleHighlightPathGenerator(this, gfx::Insets(kInkDropInset));
// Image.
SetFlipCanvasOnPaintForRTLUI(false);
SetImageHorizontalAlignment(views::ImageButton::ALIGN_CENTER);
SetImageVerticalAlignment(views::ImageButton::ALIGN_MIDDLE);
}
AssistantButton::~AssistantButton() = default;
// static
std::unique_ptr<AssistantButton> AssistantButton::Create(
AssistantButtonListener* listener,
const gfx::VectorIcon& icon,
AssistantButtonId button_id,
InitParams params) {
DCHECK_GT(params.size_in_dip, 0);
DCHECK_GT(params.icon_size_in_dip, 0);
DCHECK(params.accessible_name_id.has_value());
auto button = std::make_unique<AssistantButton>(listener, button_id);
button->GetViewAccessibility().SetName(
l10n_util::GetStringUTF16(params.accessible_name_id.value()));
if (params.tooltip_id) {
button->SetTooltipText(
l10n_util::GetStringUTF16(params.tooltip_id.value()));
}
button->SetPreferredSize(gfx::Size(params.size_in_dip, params.size_in_dip));
gfx::IconDescription icon_description(icon, params.icon_size_in_dip,
gfx::kPlaceholderColor);
if (params.icon_color_type.has_value()) {
// If we have an `icon_color_type`, that color needs to be resolved in
// OnThemeChanged(). Since we can't do anything else now, just set the data
// and return the button.
button->icon_color_type_ = params.icon_color_type.value();
// We cannot copy IconDescription as copy assignment operator of
// IconDescription is deleted since it has a non-static reference member,
// icon.
button->icon_description_.emplace(icon_description);
return button;
}
button->SetImageModel(
views::Button::STATE_NORMAL,
ui::ImageModel::FromVectorIcon(*icon_description.icon, params.icon_color,
icon_description.dip_size));
return button;
}
void AssistantButton::OnBlur() {
views::ImageButton::OnBlur();
SchedulePaint();
}
void AssistantButton::OnBoundsChanged(const gfx::Rect& previous_bounds) {
// Note that the current assumption is that button bounds are square.
DCHECK_EQ(width(), height());
}
void AssistantButton::OnFocus() {
views::ImageButton::OnFocus();
SchedulePaint();
}
void AssistantButton::OnPaintBackground(gfx::Canvas* canvas) {
// Hide focus ring when keyboard traversal is not enabled.
// This is specifically applicable to tablet mode when
// keyboard traversal may be off.
const bool hide_focus_ring_when_not_keyboard_traversal =
!AssistantUiController::Get()->GetModel()->keyboard_traversal_mode();
const bool should_show_focus_ring =
HasFocus() && !hide_focus_ring_when_not_keyboard_traversal;
if (should_show_focus_ring) {
cc::PaintFlags circle_flags;
circle_flags.setAntiAlias(true);
circle_flags.setColor(
GetColorProvider()->GetColor(cros_tokens::kFocusRingColor));
circle_flags.setStyle(cc::PaintFlags::kStroke_Style);
circle_flags.setStrokeWidth(kFocusRingStrokeWidth);
canvas->DrawCircle(GetLocalBounds().CenterPoint(),
width() / 2 - kFocusRingStrokeWidth, circle_flags);
}
}
void AssistantButton::OnThemeChanged() {
views::View::OnThemeChanged();
// Updates inkdrop color and opacity.
auto* ink_drop = views::InkDrop::Get(this);
ink_drop->SetBaseColor(
GetColorProvider()->GetColor(kColorAshInkDropOpaqueColor));
ink_drop->SetVisibleOpacity(StyleUtil::GetInkDropOpacity());
if (!icon_color_type_.has_value() || !icon_description_.has_value())
return;
// This might be the first time the image is rendered since `icon_color_type_`
// may not resolvable until now.
icon_description_->color = GetColorProvider()->GetColor(*icon_color_type_);
SetImageModel(views::Button::STATE_NORMAL,
ui::ImageModel::FromVectorIcon(*icon_description_->icon,
icon_description_->color,
icon_description_->dip_size));
}
void AssistantButton::OnButtonPressed() {
assistant::util::IncrementAssistantButtonClickCount(id_);
listener_->OnButtonPressed(id_);
}
BEGIN_METADATA(AssistantButton)
END_METADATA
} // namespace ash
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