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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_RESOURCE_COORDINATOR_TAB_LIFECYCLE_UNIT_EXTERNAL_H_
#define CHROME_BROWSER_RESOURCE_COORDINATOR_TAB_LIFECYCLE_UNIT_EXTERNAL_H_
#include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom.h"
namespace content {
class WebContents;
} // namespace content
namespace resource_coordinator {
// Interface to control the lifecycle of a tab exposed outside of
// chrome/browser/resource_coordinator/.
class TabLifecycleUnitExternal {
public:
// Returns the TabLifecycleUnitExternal associated with |web_contents|, or
// nullptr if the WebContents is not associated with a tab.
static TabLifecycleUnitExternal* FromWebContents(
content::WebContents* web_contents);
virtual ~TabLifecycleUnitExternal() = default;
// Returns the WebContents associated with this tab.
virtual content::WebContents* GetWebContents() const = 0;
// Returns true if this tab can be automatically discarded.
virtual bool IsAutoDiscardable() const = 0;
// Allows/disallows this tab to be automatically discarded.
virtual void SetAutoDiscardable(bool auto_discardable) = 0;
// Discards the tab.
virtual bool DiscardTab(mojom::LifecycleUnitDiscardReason reason,
uint64_t memory_footprint_estimate = 0) = 0;
// Returns the state of the LifecycleUnit.
virtual mojom::LifecycleUnitState GetTabState() const = 0;
// Last time ticks at which this tab was focused, or Time::Max() if it is
// currently focused.
virtual base::Time GetLastFocusedTime() const = 0;
};
} // namespace resource_coordinator
#endif // CHROME_BROWSER_RESOURCE_COORDINATOR_TAB_LIFECYCLE_UNIT_EXTERNAL_H_
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