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// Copyright 2017 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/shelf/back_button.h"
#include "ash/keyboard/keyboard_util.h"
#include "ash/resources/vector_icons/vector_icons.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_focus_cycler.h"
#include "ash/strings/grit/ash_strings.h"
#include "ash/style/ash_color_provider.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_util.h"
#include "base/metrics/user_metrics.h"
#include "base/metrics/user_metrics_action.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/paint_vector_icon.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/widget/widget.h"
namespace ash {
BackButton::BackButton(Shelf* shelf) : ShelfControlButton(shelf, this) {
GetViewAccessibility().SetName(
l10n_util::GetStringUTF16(IDS_ASH_SHELF_BACK_BUTTON_TITLE));
SetFlipCanvasOnPaintForRTLUI(true);
}
BackButton::~BackButton() {}
void BackButton::HandleLocaleChange() {
ax_name_change_subscription_ =
GetViewAccessibility().AddStringAttributeChangedCallback(
ax::mojom::StringAttribute::kName,
base::BindRepeating(&BackButton::OnAXNameChanged,
base::Unretained(this)));
GetViewAccessibility().SetName(
l10n_util::GetStringUTF16(IDS_ASH_SHELF_BACK_BUTTON_TITLE));
}
void BackButton::PaintButtonContents(gfx::Canvas* canvas) {
// Use PaintButtonContents instead of SetImage so the icon gets drawn at
// |GetCenterPoint| coordinates instead of always in the center.
gfx::ImageSkia img = CreateVectorIcon(
kShelfBackIcon,
AshColorProvider::Get()->GetContentLayerColor(
AshColorProvider::ContentLayerType::kButtonIconColor));
canvas->DrawImageInt(img, GetCenterPoint().x() - img.width() / 2,
GetCenterPoint().y() - img.height() / 2);
}
void BackButton::OnShelfButtonAboutToRequestFocusFromTabTraversal(
ShelfButton* button,
bool reverse) {
DCHECK_EQ(button, this);
if (!reverse) {
// We're trying to focus this button by advancing from the last view of
// the shelf. Let the focus manager advance to the status area instead.
shelf()->shelf_focus_cycler()->FocusOut(reverse,
SourceView::kShelfNavigationView);
}
}
void BackButton::ButtonPressed(views::Button* sender,
const ui::Event& event,
views::InkDrop* ink_drop) {
base::RecordAction(base::UserMetricsAction("AppList_BackButtonPressed"));
if (keyboard_util::CloseKeyboardIfActive())
return;
if (window_util::ShouldMinimizeTopWindowOnBack()) {
auto* top_window = window_util::GetTopWindow();
DCHECK(top_window);
WindowState::Get(top_window)->Minimize();
return;
}
window_util::SendBackKeyEvent(
GetWidget()->GetNativeWindow()->GetRootWindow());
}
void BackButton::OnThemeChanged() {
ShelfControlButton::OnThemeChanged();
SchedulePaint();
}
void BackButton::OnAXNameChanged(ax::mojom::StringAttribute attribute,
const std::optional<std::string>& name) {
SetTooltipText(GetViewAccessibility().GetCachedName());
}
BEGIN_METADATA(BackButton)
END_METADATA
} // namespace ash
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