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// Copyright (c) 2011 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.
// 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.
#ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
#define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
#pragma once
#include <map>
#include "base/memory/ref_counted.h"
#include "chrome/browser/sessions/session_id.h"
#include "content/common/notification_observer.h"
#include "content/common/notification_registrar.h"
class Browser;
class GURL;
class RenderProcessHost;
class TabContentsWrapper;
namespace content {
struct LoadCommittedDetails;
}
namespace printing {
class PrintPreviewTabController
: public base::RefCounted<PrintPreviewTabController>,
public NotificationObserver {
public:
PrintPreviewTabController();
virtual ~PrintPreviewTabController();
static PrintPreviewTabController* GetInstance();
// Initiate print preview for |initiator_tab|.
// Call this instead of GetOrCreatePreviewTab().
static void PrintPreview(TabContentsWrapper* initiator_tab);
// Get/Create the print preview tab for |initiator_tab|.
// Exposed for unit tests.
TabContentsWrapper* GetOrCreatePreviewTab(TabContentsWrapper* initiator_tab);
// Returns preview tab for |tab|.
// Returns |tab| if |tab| is a preview tab.
// Returns NULL if no preview tab exists for |tab|.
TabContentsWrapper* GetPrintPreviewForTab(TabContentsWrapper* tab) const;
// Returns initiator tab for |preview_tab|.
// Returns NULL if no initiator tab exists for |preview_tab|.
TabContentsWrapper* GetInitiatorTab(TabContentsWrapper* preview_tab);
// NotificationObserver implementation.
virtual void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details);
// Returns true if |tab| is a print preview tab.
static bool IsPrintPreviewTab(TabContentsWrapper* tab);
// Returns true if |url| is a print preview url.
static bool IsPrintPreviewURL(const GURL& url);
// Erase the initiator tab info associated with |preview_tab|.
void EraseInitiatorTabInfo(TabContentsWrapper* preview_tab);
private:
friend class base::RefCounted<PrintPreviewTabController>;
// 1:1 relationship between initiator tab and print preview tab.
// Key: Preview tab.
// Value: Initiator tab.
typedef std::map<TabContentsWrapper*, TabContentsWrapper*> PrintPreviewTabMap;
// Handler for the RENDERER_PROCESS_CLOSED notification. This is observed when
// the initiator renderer crashed.
void OnRendererProcessClosed(RenderProcessHost* rph);
// Handler for the TAB_CONTENTS_DESTROYED notification. This is observed when
// either tab is closed.
void OnTabContentsDestroyed(TabContentsWrapper* tab);
// Handler for the NAV_ENTRY_COMMITTED notification. This is observed when the
// renderer is navigated to a different page.
void OnNavEntryCommitted(TabContentsWrapper* tab,
content::LoadCommittedDetails* details);
// Creates a new print preview tab.
TabContentsWrapper* CreatePrintPreviewTab(TabContentsWrapper* initiator_tab);
// Helper function to store the initiator tab(title and url) information
// in PrintPreviewUI.
void SetInitiatorTabURLAndTitle(TabContentsWrapper* preview_tab);
// Adds/Removes observers for notifications from |tab|.
void AddObservers(TabContentsWrapper* tab);
void RemoveObservers(TabContentsWrapper* tab);
// Mapping between print preview tab and the corresponding initiator tab.
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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