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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_PRINT_PREVIEW_DIALOG_CONTROLLER_H_
#define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DIALOG_CONTROLLER_H_
#include <map>
#include "base/memory/ref_counted.h"
#include "chrome/browser/sessions/session_id.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class GURL;
namespace content {
struct LoadCommittedDetails;
class RenderProcessHost;
class WebContents;
}
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.
//
// THE ABOVE COMMENT IS OBSOLETE
//
// This class needs to be renamed. It no longer controls tabs. All tests need to
// be reevaluated as to whether they're useful. The comments, both here and in
// the tests, need to be fixed so that they don't lie.
// http://crbug.com/163671
class PrintPreviewDialogController
: public base::RefCounted<PrintPreviewDialogController>,
public content::NotificationObserver {
public:
PrintPreviewDialogController();
static PrintPreviewDialogController* GetInstance();
// Initiate print preview for |initiator_tab|.
// Call this instead of GetOrCreatePreviewDialog().
static void PrintPreview(content::WebContents* initiator_tab);
// Get/Create the print preview dialog for |initiator_tab|.
// Exposed for unit tests.
content::WebContents* GetOrCreatePreviewDialog(
content::WebContents* initiator_tab);
// DEPRECATED. Use GetOrCreatePreviewDialog() instead.
// TODO(thestig) Remove.
content::WebContents* GetOrCreatePreviewTab(
content::WebContents* initiator_tab);
// Returns preview tab for |tab|.
// Returns |tab| if |tab| is a preview tab.
// Returns NULL if no preview tab exists for |tab|.
content::WebContents* GetPrintPreviewForTab(content::WebContents* tab) const;
// Returns initiator tab for |preview_tab|.
// Returns NULL if no initiator tab exists for |preview_tab|.
content::WebContents* GetInitiatorTab(content::WebContents* preview_tab);
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Returns true if |tab| is a print preview tab.
static bool IsPrintPreviewTab(content::WebContents* 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(content::WebContents* preview_tab);
bool is_creating_print_preview_tab() const;
private:
friend class base::RefCounted<PrintPreviewDialogController>;
// 1:1 relationship between initiator tab and print preview tab.
// Key: Preview tab.
// Value: Initiator tab.
typedef std::map<content::WebContents*, content::WebContents*>
PrintPreviewTabMap;
virtual ~PrintPreviewDialogController();
// Handler for the RENDERER_PROCESS_CLOSED notification. This is observed when
// the initiator renderer crashed.
void OnRendererProcessClosed(content::RenderProcessHost* rph);
// Handler for the WEB_CONTENTS_DESTROYED notification. This is observed when
// either tab is closed.
void OnWebContentsDestroyed(content::WebContents* tab);
// Handler for the NAV_ENTRY_COMMITTED notification. This is observed when the
// renderer is navigated to a different page.
void OnNavEntryCommitted(content::WebContents* tab,
content::LoadCommittedDetails* details);
// Creates a new print preview tab.
content::WebContents* CreatePrintPreviewTab(
content::WebContents* initiator_tab);
// Helper function to store the initiator tab(title and url) information
// in PrintPreviewUI.
void SetInitiatorTabURLAndTitle(content::WebContents* preview_tab);
// Adds/Removes observers for notifications from |tab|.
void AddObservers(content::WebContents* tab);
void RemoveObservers(content::WebContents* tab);
// Removes tabs when they close/crash/navigate.
void RemoveInitiatorTab(content::WebContents* initiator_tab);
void RemovePreviewTab(content::WebContents* preview_tab);
// Mapping between print preview tab and the corresponding initiator tab.
PrintPreviewTabMap preview_tab_map_;
// A registrar for listening notifications.
content::NotificationRegistrar registrar_;
// True if the controller is waiting for a new preview tab via
// content::NAVIGATION_TYPE_NEW_PAGE.
bool waiting_for_new_preview_page_;
// Whether the PrintPreviewDialogController is in the middle of creating a
// print preview tab.
bool is_creating_print_preview_tab_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewDialogController);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DIALOG_CONTROLLER_H_
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