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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_
#include <map>
#include <memory>
#include <set>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/sequence_checker.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace content {
class WebContents;
class BrowserContext;
}
namespace printing {
// Manages hidden WebContents that prints documents in the background.
// The hidden WebContents are no longer part of any Browser / TabStripModel.
// The WebContents started life as a ConstrainedWebDialog.
// They get deleted when the printing finishes.
class BackgroundPrintingManager : public content::NotificationObserver {
public:
class Observer;
BackgroundPrintingManager();
~BackgroundPrintingManager() override;
// Takes ownership of |preview_dialog| and deletes it when |preview_dialog|
// finishes printing. This removes |preview_dialog| from its ConstrainedDialog
// and hides it from the user.
void OwnPrintPreviewDialog(content::WebContents* preview_dialog);
// Returns true if |printing_contents_map_| contains |preview_dialog|.
bool HasPrintPreviewDialog(content::WebContents* preview_dialog);
// Let others see the list of background printing contents.
std::set<content::WebContents*> CurrentContentSet();
// Delete all preview contents that are associated with |browser_context|.
void DeletePreviewContentsForBrowserContext(
content::BrowserContext* browser_context);
void OnPrintRequestCancelled(content::WebContents* preview_dialog);
private:
// content::NotificationObserver overrides:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Schedule deletion of |preview_contents|.
void DeletePreviewContents(content::WebContents* preview_contents);
// A map from print preview WebContentses (managed by
// BackgroundPrintingManager) to the Observers that observe them.
std::map<content::WebContents*, std::unique_ptr<Observer>>
printing_contents_map_;
content::NotificationRegistrar registrar_;
SEQUENCE_CHECKER(sequence_checker_);
DISALLOW_COPY_AND_ASSIGN(BackgroundPrintingManager);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_