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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_UI_METRO_DRIVER_PRINT_HANDLER_H_
#define CHROME_BROWSER_UI_METRO_DRIVER_PRINT_HANDLER_H_
#include <windows.media.playto.h>
#include <windows.graphics.printing.h>
#include <windows.ui.core.h>
#include "base/synchronization/lock.h"
#include "base/threading/thread.h"
#include "win8/metro_driver/print_document_source.h"
#include "win8/metro_driver/winrt_utils.h"
namespace base {
class Lock;
} // namespace base
namespace metro_driver {
// This class handles the print aspect of the devices charm.
class PrintHandler {
public:
PrintHandler();
~PrintHandler();
HRESULT Initialize(winui::Core::ICoreWindow* window);
// Called by the exported C functions.
static void EnablePrinting(bool printing_enabled);
static void SetPageCount(size_t page_count);
static void AddPage(size_t page_number, IStream* metafile_stream);
static void ShowPrintUI();
private:
// Callbacks from Metro.
HRESULT OnPrintRequested(
wingfx::Printing::IPrintManager* print_mgr,
wingfx::Printing::IPrintTaskRequestedEventArgs* event_args);
HRESULT OnPrintTaskSourceRequest(
wingfx::Printing::IPrintTaskSourceRequestedArgs* args);
HRESULT OnCompleted(wingfx::Printing::IPrintTask* task,
wingfx::Printing::IPrintTaskCompletedEventArgs* args);
// Utility methods.
void ClearPrintTask();
float GetLogicalDpi();
// Callback from Metro and entry point called on lockable thread.
HRESULT LogicalDpiChanged(IInspectable *sender);
static void OnLogicalDpiChanged(float dpi);
// Called on the lockable thread to set/release the doc.
static void SetPrintDocumentSource(
const mswr::ComPtr<PrintDocumentSource>& print_document_source);
static void ReleasePrintDocumentSource();
// Called on the lockable thread for the exported C functions.
static void OnEnablePrinting(bool printing_enabled);
static void OnSetPageCount(size_t page_count);
static void OnAddPage(size_t page_number,
mswr::ComPtr<IStream> metafile_stream);
// Opens the prit device charm. Must be called from the metro thread.
static void OnShowPrintUI();
mswr::ComPtr<wingfx::Printing::IPrintTask> print_task_;
EventRegistrationToken print_requested_token_;
EventRegistrationToken print_completed_token_;
EventRegistrationToken dpi_change_token_;
mswr::ComPtr<wingfx::Printing::IPrintManager> print_manager_;
PrintDocumentSource::DirectXContext directx_context_;
// Hack to give access to the Print Document from the C style entry points.
// This will go away once we can pass a pointer to this interface down to
// the Chrome Browser as we send the command to print.
static mswr::ComPtr<PrintDocumentSource> current_document_source_;
// Another hack to enable/disable printing from an exported C function.
// TODO(mad): Find a better way to do this...
static bool printing_enabled_;
// This is also a temporary hack until we can pass down the print document
// to Chrome so it can call directly into it. We need to lock the access to
// current_document_source_.
static base::Lock* lock_;
// This thread is used to send blocking jobs
// out of threads we don't want to block.
static base::Thread* thread_;
};
} // namespace metro_driver
// Exported C functions for Chrome to call into the Metro module.
extern "C" __declspec(dllexport)
void MetroEnablePrinting(BOOL printing_enabled);
extern "C" __declspec(dllexport)
void MetroSetPrintPageCount(size_t page_count);
extern "C" __declspec(dllexport)
void MetroSetPrintPageContent(size_t current_page,
void* data,
size_t data_size);
extern "C" __declspec(dllexport)
void MetroShowPrintUI();
#endif // CHROME_BROWSER_UI_METRO_DRIVER_PRINT_HANDLER_H_
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