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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.
#ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_CLOSE_BUTTON_H_
#define CHROME_BROWSER_UI_VIEWS_TABS_TAB_CLOSE_BUTTON_H_
#include "base/functional/callback_forward.h"
#include "chrome/browser/ui/views/tabs/tab_style_views.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/masked_targeter_delegate.h"
// This is a Button subclass that shows the tab closed icon.
//
// In addition to setup for the icon, it forwards middle clicks to the parent
// View by explicitly not handling them in OnMousePressed.
class TabCloseButton : public views::LabelButton,
public views::MaskedTargeterDelegate {
METADATA_HEADER(TabCloseButton, views::LabelButton)
public:
using MouseEventCallback =
base::RepeatingCallback<void(views::View*, const ui::MouseEvent&)>;
// The mouse_event callback will be called for every mouse event to allow
// middle clicks to be handled by the parent.
//
// See note on SetTabColor.
TabCloseButton(PressedCallback pressed_callback,
MouseEventCallback mouse_event_callback);
TabCloseButton(const TabCloseButton&) = delete;
TabCloseButton& operator=(const TabCloseButton&) = delete;
~TabCloseButton() override;
TabStyle::TabColors GetColors() const;
// This function must be called before the tab is painted so it knows what
// colors to use. It must also be called when the background color of the tab
// changes (this class does not track tab activation state), and when the
// theme changes.
void SetColors(TabStyle::TabColors colors);
// views::LabelButton:
View* GetTooltipHandlerForPoint(const gfx::Point& point) override;
bool OnMousePressed(const ui::MouseEvent& event) override;
void OnMouseReleased(const ui::MouseEvent& event) override;
void OnMouseMoved(const ui::MouseEvent& event) override;
void OnGestureEvent(ui::GestureEvent* event) override;
void AddLayerToRegion(ui::Layer* new_layer,
views::LayerRegion region) override;
void RemoveLayerFromRegions(ui::Layer* old_layer) override;
protected:
// Set/reset the image models for the icon with new colors.
void UpdateIcon();
// views::LabelButton:
gfx::Size CalculatePreferredSize(
const views::SizeBounds& available_size) const override;
private:
// views::MaskedTargeterDelegate:
views::View* TargetForRect(views::View* root, const gfx::Rect& rect) override;
bool GetHitTestMask(SkPath* mask) const override;
MouseEventCallback mouse_event_callback_;
TabStyle::TabColors colors_;
};
#endif // CHROME_BROWSER_UI_VIEWS_TABS_TAB_CLOSE_BUTTON_H_
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