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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PRINTING_BACKEND_PRINT_BACKEND_WIN_H_
#define PRINTING_BACKEND_PRINT_BACKEND_WIN_H_
#include <stddef.h>
#include <optional>
#include <string>
#include <vector>
#include "base/component_export.h"
#include "base/functional/callback.h"
#include "printing/backend/print_backend.h"
#include "ui/gfx/geometry/rect.h"
namespace printing {
class COMPONENT_EXPORT(PRINT_BACKEND) PrintBackendWin : public PrintBackend {
public:
PrintBackendWin();
// PrintBackend implementation.
mojom::ResultCode EnumeratePrinters(PrinterList& printer_list) override;
mojom::ResultCode GetDefaultPrinterName(
std::string& default_printer) override;
mojom::ResultCode GetPrinterBasicInfo(
const std::string& printer_name,
PrinterBasicInfo* printer_info) override;
mojom::ResultCode GetPrinterSemanticCapsAndDefaults(
const std::string& printer_name,
PrinterSemanticCapsAndDefaults* printer_info) override;
mojom::ResultCode GetPrinterCapsAndDefaults(
const std::string& printer_name,
PrinterCapsAndDefaults* printer_info) override;
std::optional<gfx::Rect> GetPaperPrintableArea(
const std::string& printer_name,
const std::string& paper_vendor_id,
const gfx::Size& paper_size_um) override;
std::vector<std::string> GetPrinterDriverInfo(
const std::string& printer_name) override;
bool IsValidPrinter(const std::string& printer_name) override;
// Allow testing to install a hook to be notified whenever the printable area
// is requested from the operating system.
void SetPrintableAreaLoadedCallbackForTesting(
base::RepeatingClosure callback);
protected:
// The printable area of a paper and the inputs needed to query for it with
// `GetPaperPrintableArea()`.
struct DriverPaperPrintableArea {
DriverPaperPrintableArea(const std::string& name,
const std::vector<std::string>& driver,
const std::string& id,
const gfx::Rect& area_um);
DriverPaperPrintableArea(const DriverPaperPrintableArea& other);
~DriverPaperPrintableArea();
// Identify the printer and driver info this was saved for.
std::string printer_name;
std::vector<std::string> driver_info;
// Platform specific id to map it back to the particular media.
std::string vendor_id;
gfx::Rect printable_area_um;
};
~PrintBackendWin() override;
private:
// A cache of the printable area for the default paper that was loaded by
// `GetPrinterSemanticCapsAndDefaults()`. The value remains cached until it is
// replaced by another call to `GetPrinterSemanticCapsAndDefaults()`. This
// ensures its validity matches that of any other printer settings that have
// been fetched from the operating system and would be used by callers.
std::optional<DriverPaperPrintableArea> last_default_paper_printable_area_;
base::RepeatingClosure printable_area_loaded_callback_for_test_;
};
} // namespace printing
#endif // PRINTING_BACKEND_PRINT_BACKEND_WIN_H_
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