printing/print_settings_initializer_gtk.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/print_settings_initializer_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8 #include <gtk/gtkunixprint.h>
   9
  10 #include "base/string16.h"
  11 #include "base/utf_string_conversions.h"
  12 #include "printing/print_settings.h"
  13 #include "printing/units.h"
  14
  15 namespace printing {
  16
  17 // static
  18 void PrintSettingsInitializerGtk::InitPrintSettings(
  19     GtkPrintSettings* settings,
  20     GtkPageSetup* page_setup,
  21     const PageRanges& new_ranges,
  22     bool print_selection_only,
  23     PrintSettings* print_settings) {
  24   DCHECK(settings);
  25   DCHECK(page_setup);
  26   DCHECK(print_settings);
  27
  28   string16 name(UTF8ToUTF16(static_cast<const char*>(
  29       gtk_print_settings_get_printer(settings))));
  30   print_settings->set_printer_name(name);
  31   print_settings->set_device_name(print_settings->printer_name());
  32   print_settings->ranges = new_ranges;
  33   print_settings->selection_only = print_selection_only;
  34
  35   gfx::Size physical_size_device_units;
  36   gfx::Rect printable_area_device_units;
  37   int dpi = gtk_print_settings_get_resolution(settings);
  38   if (dpi) {
  39     // Initialize page_setup_device_units_.
  40     physical_size_device_units.SetSize(
  41         gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH) * dpi,
  42         gtk_page_setup_get_paper_height(page_setup, GTK_UNIT_INCH) * dpi);
  43     printable_area_device_units.SetRect(
  44         gtk_page_setup_get_left_margin(page_setup, GTK_UNIT_INCH) * dpi,
  45         gtk_page_setup_get_top_margin(page_setup, GTK_UNIT_INCH) * dpi,
  46         gtk_page_setup_get_page_width(page_setup, GTK_UNIT_INCH) * dpi,
  47         gtk_page_setup_get_page_height(page_setup, GTK_UNIT_INCH) * dpi);
  48   } else {
  49     // Use default values if we cannot get valid values from the print dialog.
  50     dpi = kPixelsPerInch;
  51     double page_width_in_pixel = 8.5 * dpi;
  52     double page_height_in_pixel = 11.0 * dpi;
  53     physical_size_device_units.SetSize(
  54         static_cast<int>(page_width_in_pixel),
  55         static_cast<int>(page_height_in_pixel));
  56     printable_area_device_units.SetRect(
  57         static_cast<int>(kLeftMarginInInch * dpi),
  58         static_cast<int>(kTopMarginInInch * dpi),
  59         page_width_in_pixel - (kLeftMarginInInch + kRightMarginInInch) * dpi,
  60         page_height_in_pixel - (kTopMarginInInch + kBottomMarginInInch) * dpi);
  61   }
  62
  63   print_settings->set_dpi(dpi);
  64   print_settings->SetPrinterPrintableArea(physical_size_device_units,
  65                                           printable_area_device_units,
  66                                           dpi);
  67
  68   // Note: With the normal GTK print dialog, when the user selects the landscape
  69   // orientation, all that does is change the paper size. Which seems to be
  70   // enough to render the right output and send it to the printer.
  71   // The orientation value stays as portrait and does not actually affect
  72   // printing.
  73   // Thus this is only useful in print preview mode, where we manually set the
  74   // orientation and change the paper size ourselves.
  75   GtkPageOrientation orientation = gtk_print_settings_get_orientation(settings);
  76   print_settings->SetOrientation(orientation == GTK_PAGE_ORIENTATION_LANDSCAPE);
  77 }
  78
  79 const double PrintSettingsInitializerGtk::kTopMarginInInch = 0.25;
  80 const double PrintSettingsInitializerGtk::kBottomMarginInInch = 0.56;
  81 const double PrintSettingsInitializerGtk::kLeftMarginInInch = 0.25;
  82 const double PrintSettingsInitializerGtk::kRightMarginInInch = 0.25;
  83
  84 }  // namespace printing