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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ICON_CONTAINER_VIEW_H_
#define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ICON_CONTAINER_VIEW_H_
#include <list>
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_delegate.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/layout/animating_layout_manager.h"
#include "ui/views/layout/flex_layout.h"
#include "ui/views/view.h"
// A general view container for any type of toolbar icons.
class ToolbarIconContainerView : public views::View,
public views::ViewObserver {
METADATA_HEADER(ToolbarIconContainerView, views::View)
public:
class Observer : public base::CheckedObserver {
public:
virtual void OnHighlightChanged() = 0;
};
explicit ToolbarIconContainerView(bool uses_highlight,
bool use_default_target_layout = true);
ToolbarIconContainerView(const ToolbarIconContainerView&) = delete;
ToolbarIconContainerView& operator=(const ToolbarIconContainerView&) = delete;
~ToolbarIconContainerView() override;
// Update all the icons it contains.
virtual void UpdateAllIcons() = 0;
// Adds the RHS child as well as setting its margins.
void AddMainItem(views::View* item);
// Begins observing |button| for changes that should affect the container's
// highlight state.
void ObserveButton(views::Button* button);
void AddObserver(Observer* obs);
void RemoveObserver(const Observer* obs);
views::View* main_item() { return main_item_; }
bool GetHighlighted() const;
// views::View:
void OnThemeChanged() override;
// views::ViewObserver:
void OnViewFocused(views::View* observed_view) override;
void OnViewBlurred(views::View* observed_view) override;
bool uses_highlight() const { return uses_highlight_; }
// Provides access to the animating layout manager for subclasses.
views::AnimatingLayoutManager* GetAnimatingLayoutManager();
const views::AnimatingLayoutManager* GetAnimatingLayoutManager() const;
// Provides access to the flex layout in the animating layout manager.
views::FlexLayout* GetTargetLayoutManager();
protected:
void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
private:
// Responsible for painting a roundrect border for the owning view.
class RoundRectBorder : public ui::LayerDelegate {
public:
explicit RoundRectBorder(views::View* parent);
RoundRectBorder(const RoundRectBorder&) = delete;
RoundRectBorder& operator=(const RoundRectBorder&) = delete;
ui::Layer* layer() { return &layer_; }
// ui::LayerDelegate:
void OnPaintLayer(const ui::PaintContext& context) override;
void OnDeviceScaleFactorChanged(float old_device_scale_factor,
float new_device_scale_factor) override;
private:
raw_ptr<views::View> parent_;
ui::Layer layer_;
};
class WidgetRestoreObserver;
// views::View:
void OnMouseEntered(const ui::MouseEvent& event) override;
void OnMouseExited(const ui::MouseEvent& event) override;
void AddedToWidget() override;
void UpdateHighlight();
// Called by |button| when its ink drop highlighted state changes.
void OnButtonHighlightedChanged(views::Button* button);
// Determine whether the container shows its highlight border.
const bool uses_highlight_;
// The main view is nominally always present and is last child in the view
// hierarchy.
raw_ptr<views::View, AcrossTasksDanglingUntriaged> main_item_ = nullptr;
// Points to the child buttons that we know are currently highlighted.
// TODO(pbos): Consider observing buttons leaving our hierarchy and removing
// them from this set.
std::set<raw_ptr<const views::Button, SetExperimental>> highlighted_buttons_;
RoundRectBorder border_{this};
// Tracks when the widget is restored and resets the layout.
std::unique_ptr<WidgetRestoreObserver> restore_observer_;
std::list<base::CallbackListSubscription> subscriptions_;
base::ObserverList<Observer> observers_;
};
#endif // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ICON_CONTAINER_VIEW_H_
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