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// Copyright (c) 2012 The Chromium 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 CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_
#define CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_
#include <map>
#include <string>
#include <tuple>
#include <vector>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/sequenced_task_runner_helpers.h"
#include "content/public/browser/host_zoom_map.h"
namespace content {
class WebContentsImpl;
// HostZoomMap lives on the UI thread.
class CONTENT_EXPORT HostZoomMapImpl : public HostZoomMap {
public:
HostZoomMapImpl();
~HostZoomMapImpl() override;
// HostZoomMap implementation:
void SetPageScaleFactorIsOneForView(
int render_process_id, int render_view_id, bool is_one) override;
void ClearPageScaleFactorIsOneForView(
int render_process_id, int render_view_id) override;
void CopyFrom(HostZoomMap* copy) override;
double GetZoomLevelForHostAndScheme(const std::string& scheme,
const std::string& host) override;
// TODO(wjmaclean) Should we use a GURL here? crbug.com/384486
bool HasZoomLevel(const std::string& scheme,
const std::string& host) override;
ZoomLevelVector GetAllZoomLevels() override;
void SetZoomLevelForHost(const std::string& host, double level) override;
void InitializeZoomLevelForHost(const std::string& host,
double level,
base::Time last_modified) override;
void SetZoomLevelForHostAndScheme(const std::string& scheme,
const std::string& host,
double level) override;
bool UsesTemporaryZoomLevel(int render_process_id,
int render_view_id) override;
void SetTemporaryZoomLevel(int render_process_id,
int render_view_id,
double level) override;
void ClearZoomLevels(base::Time delete_begin, base::Time delete_end) override;
void ClearTemporaryZoomLevel(int render_process_id,
int render_view_id) override;
double GetDefaultZoomLevel() override;
void SetDefaultZoomLevel(double level) override;
std::unique_ptr<Subscription> AddZoomLevelChangedCallback(
ZoomLevelChangedCallback callback) override;
// Returns the current zoom level for the specified WebContents. This may
// be a temporary zoom level, depending on UsesTemporaryZoomLevel().
double GetZoomLevelForWebContents(WebContentsImpl* web_contents_impl);
bool PageScaleFactorIsOneForWebContents(
WebContentsImpl* web_contents_impl) const;
// Sets the zoom level for this WebContents. If this WebContents is using
// a temporary zoom level, then level is only applied to this WebContents.
// Otherwise, the level will be applied on a host level.
void SetZoomLevelForWebContents(WebContentsImpl* web_contents_impl,
double level);
// Returns the temporary zoom level that's only valid for the lifetime of
// the given WebContents (i.e. isn't saved and doesn't affect other
// WebContentses) if it exists, the default zoom level otherwise.
double GetTemporaryZoomLevel(int render_process_id,
int render_view_id) const;
void SendErrorPageZoomLevelRefresh();
void WillCloseRenderView(int render_process_id, int render_view_id);
void SetClockForTesting(base::Clock* clock) override;
private:
struct ZoomLevel {
double level;
base::Time last_modified;
};
typedef std::map<std::string, ZoomLevel> HostZoomLevels;
typedef std::map<std::string, HostZoomLevels> SchemeHostZoomLevels;
struct RenderViewKey {
int render_process_id;
int render_view_id;
RenderViewKey(int render_process_id, int render_view_id)
: render_process_id(render_process_id),
render_view_id(render_view_id) {}
bool operator<(const RenderViewKey& other) const {
return std::tie(render_process_id, render_view_id) <
std::tie(other.render_process_id, other.render_view_id);
}
};
typedef std::map<RenderViewKey, double> TemporaryZoomLevels;
typedef std::map<RenderViewKey, bool> ViewPageScaleFactorsAreOne;
double GetZoomLevelForHost(const std::string& host) const;
// Set a zoom level for |host| and store the |last_modified| timestamp.
// Use only to explicitly set a timestamp.
void SetZoomLevelForHostInternal(const std::string& host,
double level,
base::Time last_modified);
// Notifies the renderers from this browser context to change the zoom level
// for the specified host and scheme.
// |zoom level| will be extracted from |host_zoom_levels_| when needed, so no
// need to pass them in.
// TODO(wjmaclean) Should we use a GURL here? crbug.com/384486
void SendZoomLevelChange(const std::string& scheme, const std::string& host);
// Callbacks called when zoom level changes.
base::CallbackList<void(const ZoomLevelChange&)>
zoom_level_changed_callbacks_;
// Copy of the pref data.
HostZoomLevels host_zoom_levels_;
SchemeHostZoomLevels scheme_host_zoom_levels_;
double default_zoom_level_;
// Page scale factor data for each renderer.
ViewPageScaleFactorsAreOne view_page_scale_factors_are_one_;
TemporaryZoomLevels temporary_zoom_levels_;
base::Clock* clock_;
DISALLOW_COPY_AND_ASSIGN(HostZoomMapImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_
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