printing/print_settings.h

// Copyright (c) 2010 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 PRINTING_PRINT_SETTINGS_H_
#define PRINTING_PRINT_SETTINGS_H_

#include "gfx/rect.h"
#include "printing/page_overlays.h"
#include "printing/page_range.h"
#include "printing/page_setup.h"

#if defined(OS_MACOSX)
#import <ApplicationServices/ApplicationServices.h>
#endif

#if defined(OS_WIN)
typedef struct HDC__* HDC;
typedef struct _devicemodeW DEVMODE;
#elif defined(USE_X11)
typedef struct _GtkPrintSettings GtkPrintSettings;
typedef struct _GtkPageSetup GtkPageSetup;
#endif

namespace printing {

// OS-independent print settings.
class PrintSettings {
 public:
  PrintSettings();
  ~PrintSettings();

  // Reinitialize the settings to the default values.
  void Clear();

#if defined(OS_WIN)
  // Reads the settings from the selected device context. Calculates derived
  // values like printable_area_.
  void Init(HDC hdc,
            const DEVMODE& dev_mode,
            const PageRanges& new_ranges,
            const std::wstring& new_device_name,
            bool selection_only);
#elif defined(OS_MACOSX)
  // Reads the settings from the given PMPrinter and PMPageFormat.
  void Init(PMPrinter printer, PMPageFormat page_format,
            const PageRanges& new_ranges, bool print_selection_only);
#elif defined(USE_X11)
  // Initializes the settings from the given GtkPrintSettings and GtkPageSetup.
  // TODO(jhawkins): This method is a mess across the platforms. Refactor.
  void Init(GtkPrintSettings* settings,
            GtkPageSetup* page_setup,
            const PageRanges& new_ranges,
            bool print_selection_onl);
#endif

  // Set printer printable area in in device units.
  void SetPrinterPrintableArea(gfx::Size const& physical_size_device_units,
                               gfx::Rect const& printable_area_device_units,
                               int units_per_inch);

  // Equality operator.
  // NOTE: printer_name is NOT tested for equality since it doesn't affect the
  // output.
  bool Equals(const PrintSettings& rhs) const;

  const std::wstring& printer_name() const { return printer_name_; }
  void set_device_name(const std::wstring& device_name) {
    device_name_ = device_name;
  }
  const std::wstring& device_name() const { return device_name_; }
  int dpi() const { return dpi_; }
  const PageSetup& page_setup_device_units() const {
    return page_setup_device_units_;
  }
  int device_units_per_inch() const {
#if defined(OS_MACOSX)
    return 72;
#else  // defined(OS_MACOSX)
    return dpi();
#endif  // defined(OS_MACOSX)
  }

  // Multi-page printing. Each PageRange describes a from-to page combination.
  // This permits printing selected pages only.
  PageRanges ranges;

  // By imaging to a width a little wider than the available pixels, thin pages
  // will be scaled down a little, matching the way they print in IE and Camino.
  // This lets them use fewer sheets than they would otherwise, which is
  // presumably why other browsers do this. Wide pages will be scaled down more
  // than this.
  double min_shrink;

  // This number determines how small we are willing to reduce the page content
  // in order to accommodate the widest line. If the page would have to be
  // reduced smaller to make the widest line fit, we just clip instead (this
  // behavior matches MacIE and Mozilla, at least)
  double max_shrink;

  // Desired visible dots per inch rendering for output. Printing should be
  // scaled to ScreenDpi/dpix*desired_dpi.
  int desired_dpi;

  // The various overlays (headers and footers).
  PageOverlays overlays;

  // Indicates if the user only wants to print the current selection.
  bool selection_only;

  // Indicates whether we should use browser-controlled page overlays
  // (header, footer, margins etc). If it is false, the overlays are
  // controlled by the renderer.
  bool use_overlays;

  // Cookie generator. It is used to initialize PrintedDocument with its
  // associated PrintSettings, to be sure that each generated PrintedPage is
  // correctly associated with its corresponding PrintedDocument.
  static int NewCookie();

 private:
  //////////////////////////////////////////////////////////////////////////////
  // Settings that can't be changed without side-effects.

  // Printer name as shown to the user.
  std::wstring printer_name_;

  // Printer device name as opened by the OS.
  std::wstring device_name_;

  // Page setup in device units.
  PageSetup page_setup_device_units_;

  // Printer's device effective dots per inch in both axis.
  int dpi_;

  // Is the orientation landscape or portrait.
  bool landscape_;
};

}  // namespace printing

#endif  // PRINTING_PRINT_SETTINGS_H_