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// Copyright (c) 2010 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_PRINT_PREVIEW_TAB_CONTROLLER_H_
#define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
#pragma once
#include <map>
#include "base/ref_counted.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
class Browser;
class TabContents;
namespace printing {
// For print preview, a print preview (PP) tab is linked with the initiator tab
// that initiated the printing operation. If the tab initiates a second
// printing operation while the first print preview tab is still open, that PP
// tab is focused/activated. There may be more than one PP tab open. There is a
// 1:1 relationship between PP tabs and initiating tabs. This class manages PP
// tabs and initiator tabs.
class PrintPreviewTabController
: public base::RefCounted<PrintPreviewTabController>,
public NotificationObserver {
public:
static PrintPreviewTabController* GetInstance();
PrintPreviewTabController();
virtual ~PrintPreviewTabController();
// Get/Create the print preview tab for |initiator_tab|.
// |browser_window_id| is the browser window containing |initiator_tab|.
TabContents* GetOrCreatePreviewTab(
TabContents* initiator_tab, int browser_window_id);
// Notification observer implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
friend class base::RefCounted<PrintPreviewTabController>;
// Returns true if |tab| is a print preview tab.
bool IsPrintPreviewTab(TabContents* tab);
// Returns initiator tab for |preview_tab|.
// Returns NULL if no initiator tab exists for |preview_tab|.
TabContents* GetInitiatorTab(TabContents* preview_tab);
// Returns preview tab for |tab|.
// Returns |tab| if |tab| is a preview tab.
// Returns NULL if no preview tab exists for |tab|.
TabContents* GetPrintPreviewForTab(TabContents* tab);
// Creates a new print preview tab.
TabContents* CreatePrintPreviewTab(
TabContents* initiator_tab, int browser_window_id);
// Adds/Removes observers for notifications from |tab|.
void AddObservers(TabContents* tab);
void RemoveObservers(TabContents* tab);
// 1:1 relationship between initiator tab and print preview tab.
// Key: Preview tab.
// Value: Initiator tab.
typedef std::map<TabContents*, TabContents*> PrintPreviewTabMap;
PrintPreviewTabMap preview_tab_map_;
// A registrar for listening notifications.
NotificationRegistrar registrar_;
// True if the controller is waiting for a new preview tab via
// NavigationType::NEW_PAGE.
bool waiting_for_new_preview_page_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewTabController);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
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