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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_UI_H_
#define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_
#pragma once
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/time.h"
#include "chrome/browser/printing/print_preview_data_service.h"
#include "chrome/browser/ui/webui/chrome_web_ui.h"
class PrintPreviewDataService;
class PrintPreviewHandler;
struct PrintHostMsg_DidGetPreviewPageCount_Params;
class PrintPreviewUI : public ChromeWebUI {
public:
explicit PrintPreviewUI(TabContents* contents);
virtual ~PrintPreviewUI();
// Gets the print preview |data|. |index| is zero-based, and can be
// |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to get the entire preview
// document.
void GetPrintPreviewDataForIndex(int index,
scoped_refptr<RefCountedBytes>* data);
// Sets the print preview |data|. |index| is zero-based, and can be
// |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to set the entire preview
// document.
void SetPrintPreviewDataForIndex(int index, const RefCountedBytes* data);
// Clear the existing print preview data.
void ClearAllPreviewData();
// Setters
void SetInitiatorTabURL(const std::string& initiator_url);
// Notifies the Web UI that there is a print preview request. There should be
// a matching call to OnPreviewDataIsAvailable() or OnPrintPreviewFailed().
void OnPrintPreviewRequest();
// Notifies the Web UI about the page count of the request preview.
void OnDidGetPreviewPageCount(
const PrintHostMsg_DidGetPreviewPageCount_Params& params);
// Notifies the Web UI that the 0-based page |page_number| has been rendered.
// |preview_request_id| indicates wich request resulted in this response.
void OnDidPreviewPage(int page_number, int preview_request_id);
// Notifies the Web UI renderer that preview data is available.
// |expected_pages_count| specifies the total number of pages. |job_title| is
// the title of the page being previewed. |preview_request_id| indicates which
// request resulted in this response.
void OnPreviewDataIsAvailable(int expected_pages_count,
const string16& job_title,
int preview_request_id);
void OnReusePreviewData(int preview_request_id);
// Notifies the Web UI that preview tab is destroyed. This is the last chance
// to communicate with the source tab before the association is erased.
void OnTabDestroyed();
// Notifies the Web UI that the print preview failed to render.
void OnPrintPreviewFailed();
// Notifies the Web UI that the print preview request has been cancelled.
void OnPrintPreviewCancelled();
// Notifies the Web UI that initiator tab is closed, so we can disable all the
// controls that need the initiator tab for generating the preview data.
void OnInitiatorTabClosed();
// Notifies the Web UI that the initiator tab has crashed.
void OnInitiatorTabCrashed();
// Notifies the Web UI renderer that file selection has been cancelled.
void OnFileSelectionCancelled();
// Returns true if there are pending requests.
bool HasPendingRequests();
int document_cookie();
private:
// Returns the Singleton instance of the PrintPreviewDataService.
PrintPreviewDataService* print_preview_data_service();
void DecrementRequestCount();
base::TimeTicks initial_preview_start_time_;
// Store the PrintPreviewUI address string.
std::string preview_ui_addr_str_;
// Weak pointer to the WebUI handler.
PrintPreviewHandler* handler_;
// The number of print preview requests in flight.
uint32 request_count_;
// Document cookie from the initiator renderer.
int document_cookie_;
// Store the |initiator_url| in order to display an accurate error message
// when the initiator tab is closed/crashed.
std::string initiator_url_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
};
#endif // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_
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