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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 CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
#define CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
#pragma once
#include <map>
#include <set>
#include "base/compiler_specific.h"
#include "base/threading/non_thread_safe.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class TabContents;
namespace content {
class RenderProcessHost;
}
namespace printing {
// Manages hidden tabs that prints documents in the background.
// The hidden tabs are no longer part of any Browser / TabStripModel.
// They get deleted when the tab finishes printing.
class BackgroundPrintingManager : public base::NonThreadSafe,
public content::NotificationObserver {
public:
typedef std::set<TabContents*> TabContentsSet;
BackgroundPrintingManager();
virtual ~BackgroundPrintingManager();
// Takes ownership of |preview_tab| and deletes it when |preview_tab| finishes
// printing. This removes the TabContents from its TabStrip and hides it from
// the user.
void OwnPrintPreviewTab(TabContents* preview_tab);
// Let others iterate over the list of background printing tabs.
TabContentsSet::const_iterator begin();
TabContentsSet::const_iterator end();
// Returns true if |printing_tabs_| contains |preview_tab|.
bool HasPrintPreviewTab(TabContents* preview_tab);
// content::NotificationObserver overrides:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
// Notifications handlers.
void OnRendererProcessClosed(content::RenderProcessHost* rph);
void OnPrintJobReleased(TabContents* preview_tab);
void OnTabContentsDestroyed(TabContents* preview_tab);
// Add |tab| to the pending deletion set and schedule deletion.
void DeletePreviewTab(TabContents* tab);
// Check if any of the TabContents in |set| share a RenderProcessHost
// with |tab|, excluding |tab|.
bool HasSharedRenderProcessHost(const TabContentsSet& set,
TabContents* tab);
// The set of print preview tabs managed by BackgroundPrintingManager.
TabContentsSet printing_tabs_;
// The set of print preview tabs managed by BackgroundPrintingManager that
// are pending deletion.
TabContentsSet printing_tabs_pending_deletion_;
content::NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(BackgroundPrintingManager);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
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