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// Copyright 2012 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_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
#define CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
#include <map>
#include <memory>
#include <set>
#include "base/sequence_checker.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:
class Observer;
BackgroundPrintingManager();
BackgroundPrintingManager(const BackgroundPrintingManager&) = delete;
BackgroundPrintingManager& operator=(const BackgroundPrintingManager&) =
delete;
~BackgroundPrintingManager();
// 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(
std::unique_ptr<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:
// 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 and the owned
// version of the WebContents.
struct PrintingContents {
PrintingContents();
PrintingContents(const PrintingContents&) = delete;
PrintingContents& operator=(const PrintingContents&) = delete;
PrintingContents(PrintingContents&&);
PrintingContents& operator=(PrintingContents&&);
~PrintingContents();
std::unique_ptr<content::WebContents> contents;
std::unique_ptr<Observer> observer;
};
std::map<content::WebContents*, PrintingContents> printing_contents_map_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_
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