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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.
#ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
#define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
#pragma once
#include "base/compiler_specific.h"
#include "content/public/browser/web_contents_observer.h"
class PrintPreviewUI;
class TabContentsWrapper;
struct PrintHostMsg_DidGetPreviewPageCount_Params;
struct PrintHostMsg_DidPreviewDocument_Params;
struct PrintHostMsg_DidPreviewPage_Params;
namespace printing {
struct PageSizeMargins;
// TabContents offloads print preview message handling to
// PrintPreviewMessageHandler. This object has the same life time as the
// TabContents that owns it.
class PrintPreviewMessageHandler : public content::WebContentsObserver {
public:
explicit PrintPreviewMessageHandler(content::WebContents* web_contents);
virtual ~PrintPreviewMessageHandler();
// content::WebContentsObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void NavigateToPendingEntry(const GURL& url,
content::NavigationController::ReloadType reload_type) OVERRIDE;
private:
// Gets the print preview tab associated with the WebContents being observed.
TabContentsWrapper* GetPrintPreviewTab();
// Helper function to return the TabContentsWrapper for web_contents().
TabContentsWrapper* tab_contents_wrapper();
// Common code between failure handlers. Returns a PrintPreviewUI* if there
// exists a PrintPreviewUI to send messages to.
PrintPreviewUI* OnFailure(int document_cookie);
// Message handlers.
void OnRequestPrintPreview(bool source_is_modifiable);
void OnDidGetDefaultPageLayout(
const printing::PageSizeMargins& page_layout_in_points);
void OnDidGetPreviewPageCount(
const PrintHostMsg_DidGetPreviewPageCount_Params& params);
void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
void OnMetafileReadyForPrinting(
const PrintHostMsg_DidPreviewDocument_Params& params);
void OnPrintPreviewFailed(int document_cookie);
void OnPrintPreviewCancelled(int document_cookie);
void OnInvalidPrinterSettings(int document_cookie);
DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
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