cef/libcef/browser/views/widget_impl.h

101 lines
3.7 KiB
C++

// Copyright 2024 The Chromium Embedded Framework Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be found
// in the LICENSE file.
#ifndef CEF_LIBCEF_BROWSER_VIEWS_WIDGET_IMPL_H_
#define CEF_LIBCEF_BROWSER_VIEWS_WIDGET_IMPL_H_
#pragma once
#include <map>
#include "libcef/browser/views/color_provider_tracker.h"
#include "libcef/browser/views/widget.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/themes/theme_service_observer.h"
#include "ui/views/widget/widget.h"
class CefWindowView;
class Profile;
// Widget specialization to implement theme support for the Alloy runtime. The
// global NativeTheme (native/OS theme) will be used unless this Widget contains
// a BrowserView, in which case a Chrome theme associated with the BrowserView's
// Profile will be used.
//
// Theme support works as follows:
// - OnNativeThemeUpdated is called when the NativeTheme associated with this
// Widget changes. For example, when switching the OS appearance between light
// and dark mode.
// - OnColorProviderCacheResetMissed is called if some other NativeTheme not
// associated with this Widget changes and we need to reapply global color
// overrides (see CefColorProviderTracker for details).
// - OnThemeChanged is called when the client changes the Chrome theme
// explicitly by calling CefRequestContext::SetChromeColorScheme.
// - GetThemeProvider, GetCustomTheme and GetColorProviderKey return objects
// that are used internally to apply the current theme.
//
// Callers should use view_util methods (e.g. GetColor, ShouldUseDarkTheme, etc)
// instead of calling theme-related Widget methods directly.
class CefWidgetImpl : public views::Widget,
public CefWidget,
public CefColorProviderTracker::Observer,
public ThemeServiceObserver {
public:
explicit CefWidgetImpl(CefWindowView* window_view);
~CefWidgetImpl() override;
CefWidgetImpl(const CefWidgetImpl&) = delete;
CefWidgetImpl& operator=(const CefWidgetImpl&) = delete;
// CefWidget methods:
bool IsAlloyStyle() const override { return true; }
views::Widget* GetWidget() override { return this; }
const views::Widget* GetWidget() const override { return this; }
void Initialized() override;
bool IsInitialized() const override { return initialized_; }
void AddAssociatedProfile(Profile* profile) override;
void RemoveAssociatedProfile(Profile* profile) override;
Profile* GetThemeProfile() const override;
// views::Widget methods:
const ui::ThemeProvider* GetThemeProvider() const override;
ui::ColorProviderKey::ThemeInitializerSupplier* GetCustomTheme()
const override;
// NativeWidgetDelegate methods:
void OnNativeWidgetDestroyed() override;
// ui::NativeThemeObserver methods:
void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override;
ui::ColorProviderKey GetColorProviderKey() const override;
// ThemeServiceObserver methods:
void OnThemeChanged() override;
private:
void NotifyThemeColorsChanged(bool chrome_theme, bool call_theme_changed);
// Select a native theme that is appropriate for the current context. This is
// currently only needed for Linux to switch between the regular NativeTheme
// and the GTK NativeTheme instance.
void SelectNativeTheme();
// CefColorProviderTracker::Observer methods:
void OnColorProviderCacheResetMissed() override;
CefWindowView* window_view_;
bool initialized_ = false;
// Map of Profile* to count.
using ProfileMap = std::map<Profile*, size_t>;
ProfileMap associated_profiles_;
CefColorProviderTracker color_provider_tracker_{this};
base::WeakPtrFactory<CefWidgetImpl> weak_ptr_factory_{this};
};
#endif // CEF_LIBCEF_BROWSER_VIEWS_WIDGET_IMPL_H_