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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_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
#pragma once
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/ui/shell_dialogs.h"
#include "content/browser/webui/web_ui.h"
class FilePath;
class FundamentalValue;
class PrintSystemTaskProxy;
class StringValue;
namespace printing {
class PrintBackend;
}
// The handler for Javascript messages related to the "print preview" dialog.
class PrintPreviewHandler : public WebUIMessageHandler,
public base::SupportsWeakPtr<PrintPreviewHandler>,
public SelectFileDialog::Listener {
public:
PrintPreviewHandler();
virtual ~PrintPreviewHandler();
// WebUIMessageHandler implementation.
virtual void RegisterMessages();
// SelectFileDialog::Listener implementation.
virtual void FileSelected(const FilePath& path, int index, void* params);
// Displays a modal dialog, prompting the user to select a file.
void SelectFile(const FilePath& default_path);
private:
friend class PrintSystemTaskProxy;
TabContents* preview_tab();
// Get the default printer. |args| is unused.
void HandleGetDefaultPrinter(const ListValue* args);
// Get the list of printers. |args| is unused.
void HandleGetPrinters(const ListValue* args);
// Ask the initiator renderer to generate a preview.
// First element of |args| is a job settings JSON string.
void HandleGetPreview(const ListValue* args);
// Get the job settings from Web UI and initiate printing.
// First element of |args| is a job settings JSON string.
void HandlePrint(const ListValue* args);
// Handles the request to hide the preview tab for printing.
// |args| is unused.
void HandleHidePreview(const ListValue* args);
// Handles the request to cancel the pending print request.
// |args| is unused.
void HandleCancelPendingPrintRequest(const ListValue* args);
// Get the printer capabilities.
// First element of |args| is the printer name.
void HandleGetPrinterCapabilities(const ListValue* args);
// Ask the initiator renderer to show the native print system dialog.
// |args| is unused.
void HandleShowSystemDialog(const ListValue* args);
// Ask the browser to show the native printer management dialog.
// |args| is unused.
void HandleManagePrinters(const ListValue* args);
// Ask the browser to close the preview tab.
// |args| is unused.
void HandleClosePreviewTab(const ListValue* args);
// Send the printer capabilities to the Web UI.
// |settings_info| contains printer capabilities information.
void SendPrinterCapabilities(const DictionaryValue& settings_info);
// Send the default printer to the Web UI.
void SendDefaultPrinter(const StringValue& default_printer);
// Send the list of printers to the Web UI.
void SendPrinterList(const ListValue& printers);
// Helper function to get the initiator tab for the print preview tab.
TabContents* GetInitiatorTab();
// Helper function to close the print preview tab.
void ClosePrintPreviewTab();
// Helper function to activate the initiator tab and close the preview tab.
void ActivateInitiatorTabAndClosePreviewTab();
// Adds all the recorded stats taken so far to histogram counts.
void ReportStats();
// Helper function to hide the preview tab for printing.
void HidePreviewTab();
// Helper function to clear initiator tab details for this preview tab.
void ClearInitiatorTabDetails();
// Pointer to current print system.
scoped_refptr<printing::PrintBackend> print_backend_;
// The underlying dialog object.
scoped_refptr<SelectFileDialog> select_file_dialog_;
static FilePath* last_saved_path_;
static std::string* last_used_printer_;
// A count of how many requests received to regenerate preview data.
// Initialized to 0 then incremented and emitted to a histogram.
int regenerate_preview_request_count_;
// A count of how many requests received to show manage printers dialog.
int manage_printers_dialog_request_count_;
// Whether we have already logged a failed print preview.
bool reported_failed_preview_;
// Whether we have already logged the number of printers this session.
bool has_logged_printers_count_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
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