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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/constrained_html_ui.h"
class PrintPreviewDataService;
class PrintPreviewHandler;
struct PrintHostMsg_DidGetPreviewPageCount_Params;
namespace printing {
struct PageSizeMargins;
}
class PrintPreviewUI : public ConstrainedHtmlUI {
public:
explicit PrintPreviewUI(content::WebContents* 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();
// Returns the available draft page count.
int GetAvailableDraftPageCount();
// Setters
void SetInitiatorTabURLAndTitle(const std::string& initiator_url,
const string16& initiator_tab_title);
string16 initiator_tab_title() { return initiator_tab_title_; }
bool source_is_modifiable() { return source_is_modifiable_; }
// Set |source_is_modifiable_| for |print_preview_tab|'s PrintPreviewUI.
static void SetSourceIsModifiable(TabContentsWrapper* print_preview_tab,
bool source_is_modifiable);
// Determines whether to cancel a print preview request based on
// |preview_ui_addr| and |request_id|.
// Can be called from any thread.
static void GetCurrentPrintPreviewStatus(const std::string& preview_ui_addr,
int request_id,
bool* cancel);
// Returns a string to uniquely identify this PrintPreviewUI.
std::string GetPrintPreviewUIAddress() const;
// Notifies the Web UI of a print preview request with |request_id|.
void OnPrintPreviewRequest(int request_id);
// Notifies the Web UI to show the system dialog.
void OnShowSystemDialog();
// Notifies the Web UI about the page count of the request preview.
void OnDidGetPreviewPageCount(
const PrintHostMsg_DidGetPreviewPageCount_Params& params);
// Notifies the Web UI of the default page layout according to the currently
// selected printer and page size.
void OnDidGetDefaultPageLayout(
const printing::PageSizeMargins& page_layout,
bool has_custom_page_size_style);
// 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.
// |preview_request_id| indicates which request resulted in this response.
void OnPreviewDataIsAvailable(int expected_pages_count,
int preview_request_id);
// Notifies the Web UI renderer to reuse the preview data.
// |preview_request_id| indicates which request resulted in this response.
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();
// Notified the Web UI that this print preview tab's RenderProcess has been
// closed, which may occur for several reasons, e.g. tab closure or crash.
void OnPrintPreviewTabClosed();
// 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 renderer that file selection has been cancelled.
void OnFileSelectionCancelled();
// Notifies the Web UI that the printer is unavailable or its settings are
// invalid.
void OnInvalidPrinterSettings();
// Notifies the Web UI to cancel the pending preview request.
void OnCancelPendingPreviewRequest();
// Hides the print preview tab.
void OnHidePreviewTab();
// Closes the print preview tab.
void OnClosePrintPreviewTab();
// Reload the printers list.
void OnReloadPrintersList();
private:
friend class PrintPreviewHandlerTest;
FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsCustom);
FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsDefault);
FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
StickyMarginsCustomThenDefault);
FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
GetLastUsedMarginSettingsCustom);
FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
GetLastUsedMarginSettingsDefault);
FRIEND_TEST_ALL_PREFIXES(PrintPreviewTabControllerUnitTest,
TitleAfterReload);
// Returns the Singleton instance of the PrintPreviewDataService.
PrintPreviewDataService* print_preview_data_service();
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_;
// Store the |initiator_url| in order to display an accurate error message
// when the initiator tab is closed/crashed.
std::string initiator_url_;
// Indicates whether the source document can be modified.
bool source_is_modifiable_;
// Store the initiator tab title, used for populating the print preview tab
// title.
string16 initiator_tab_title_;
// Keeps track of whether OnClosePrintPreviewTab() has been called or not.
bool tab_closed_;
// True if the user visited the page directly, false if it's a live UI.
bool is_dummy_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
};
#endif // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_
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