mirror of https://github.com/electron/electron
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef ELECTRON_SHELL_BROWSER_ZOOM_LEVEL_DELEGATE_H_
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#define ELECTRON_SHELL_BROWSER_ZOOM_LEVEL_DELEGATE_H_
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#include <string>
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#include "base/memory/raw_ptr.h"
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#include "base/values.h"
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#include "components/prefs/pref_service.h"
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#include "content/public/browser/host_zoom_map.h"
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#include "content/public/browser/zoom_level_delegate.h"
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namespace base {
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class FilePath;
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} // namespace base
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class PrefRegistrySimple;
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namespace electron {
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// A class to manage per-partition default and per-host zoom levels.
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// It implements an interface between the content/ zoom
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// levels in HostZoomMap and preference system. All changes
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// to the per-partition default zoom levels flow through this
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// class. Any changes to per-host levels are updated when HostZoomMap calls
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// OnZoomLevelChanged.
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class ZoomLevelDelegate : public content::ZoomLevelDelegate {
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public:
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static void RegisterPrefs(PrefRegistrySimple* pref_registry);
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ZoomLevelDelegate(PrefService* pref_service,
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const base::FilePath& partition_path);
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~ZoomLevelDelegate() override;
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// disable copy
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ZoomLevelDelegate(const ZoomLevelDelegate&) = delete;
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ZoomLevelDelegate& operator=(const ZoomLevelDelegate&) = delete;
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void SetDefaultZoomLevelPref(double level);
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double GetDefaultZoomLevelPref() const;
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// content::ZoomLevelDelegate:
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void InitHostZoomMap(content::HostZoomMap* host_zoom_map) override;
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private:
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void ExtractPerHostZoomLevels(const base::Value::Dict& host_zoom_dictionary);
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// This is a callback function that receives notifications from HostZoomMap
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// when per-host zoom levels change. It is used to update the per-host
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// zoom levels (if any) managed by this class (for its associated partition).
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void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);
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raw_ptr<PrefService> pref_service_;
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raw_ptr<content::HostZoomMap> host_zoom_map_ = nullptr;
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base::CallbackListSubscription zoom_subscription_;
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std::string partition_key_;
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};
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} // namespace electron
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#endif // ELECTRON_SHELL_BROWSER_ZOOM_LEVEL_DELEGATE_H_
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