74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
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// Copyright (c) 2017 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#ifndef ATOM_BROWSER_WEB_CONTENTS_ZOOM_CONTROLLER_H_
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#define ATOM_BROWSER_WEB_CONTENTS_ZOOM_CONTROLLER_H_
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#include "content/public/browser/host_zoom_map.h"
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#include "content/public/browser/web_contents_observer.h"
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#include "content/public/browser/web_contents_user_data.h"
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namespace atom {
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// Manages the zoom changes of WebContents.
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class WebContentsZoomController
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: public content::WebContentsObserver,
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public content::WebContentsUserData<WebContentsZoomController> {
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public:
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class Observer {
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public:
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virtual void OnZoomLevelChanged(content::WebContents* web_contents,
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double level) {}
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protected:
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virtual ~Observer() {}
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};
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explicit WebContentsZoomController(content::WebContents* web_contents);
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~WebContentsZoomController() override;
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void AddObserver(Observer* observer);
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void RemoveObserver(Observer* observer);
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// Methods for managing zoom levels.
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void SetZoomLevel(double level);
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double GetZoomLevel();
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void SetDefaultZoomFactor(double factor);
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double GetDefaultZoomFactor();
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protected:
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// content::WebContentsObserver:
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void DidFinishNavigation(content::NavigationHandle* handle) override;
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void WebContentsDestroyed() override;
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void RenderFrameHostChanged(content::RenderFrameHost* old_host,
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content::RenderFrameHost* new_host) override;
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private:
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friend class content::WebContentsUserData<WebContentsZoomController>;
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// Called after a navigation has committed to set default zoom factor.
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void SetZoomFactorOnNavigationIfNeeded(const GURL& url);
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// Track zoom changes of a host in other instances of a partition.
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void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);
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// kZoomFactor.
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double default_zoom_factor_;
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// Map between zoom factor and hosts in this webContent.
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std::map<std::string, double> host_zoom_factor_;
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base::ObserverList<Observer> observers_;
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content::HostZoomMap* host_zoom_map_;
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std::unique_ptr<content::HostZoomMap::Subscription> zoom_subscription_;
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DISALLOW_COPY_AND_ASSIGN(WebContentsZoomController);
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};
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} // namespace atom
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#endif // ATOM_BROWSER_WEB_CONTENTS_ZOOM_CONTROLLER_H_
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