1// Copyright 2014 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 "chrome/browser/ui/libgtk2ui/printing_gtk2_util.h"
6
7#include <gtk/gtk.h>
8#include <gtk/gtkunixprint.h>
9
10#include "base/strings/string16.h"
11#include "base/strings/utf_string_conversions.h"
12#include "printing/print_settings.h"
13#include "printing/printing_context_linux.h"
14#include "printing/units.h"
15
16namespace {
17
18const double kTopMarginInInch = 0.25;
19const double kBottomMarginInInch = 0.56;
20const double kLeftMarginInInch = 0.25;
21const double kRightMarginInInch = 0.25;
22
23}  // namespace
24
25gfx::Size GetPdfPaperSizeDeviceUnitsGtk(
26    printing::PrintingContextLinux* context) {
27  GtkPageSetup* page_setup = gtk_page_setup_new();
28
29  gfx::SizeF paper_size(
30      gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH),
31      gtk_page_setup_get_paper_height(page_setup, GTK_UNIT_INCH));
32
33  g_object_unref(page_setup);
34
35  const printing::PrintSettings& settings = context->settings();
36
37  return gfx::Size(
38      paper_size.width() * settings.device_units_per_inch(),
39      paper_size.height() * settings.device_units_per_inch());
40}
41
42void InitPrintSettingsGtk(GtkPrintSettings* settings,
43                          GtkPageSetup* page_setup,
44                          printing::PrintSettings* print_settings) {
45  DCHECK(settings);
46  DCHECK(page_setup);
47  DCHECK(print_settings);
48
49  base::string16 name(base::UTF8ToUTF16(static_cast<const char*>(
50      gtk_print_settings_get_printer(settings))));
51  print_settings->set_device_name(name);
52
53  gfx::Size physical_size_device_units;
54  gfx::Rect printable_area_device_units;
55  int dpi = gtk_print_settings_get_resolution(settings);
56  if (dpi) {
57    // Initialize page_setup_device_units_.
58    physical_size_device_units.SetSize(
59        gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH) * dpi,
60        gtk_page_setup_get_paper_height(page_setup, GTK_UNIT_INCH) * dpi);
61    printable_area_device_units.SetRect(
62        gtk_page_setup_get_left_margin(page_setup, GTK_UNIT_INCH) * dpi,
63        gtk_page_setup_get_top_margin(page_setup, GTK_UNIT_INCH) * dpi,
64        gtk_page_setup_get_page_width(page_setup, GTK_UNIT_INCH) * dpi,
65        gtk_page_setup_get_page_height(page_setup, GTK_UNIT_INCH) * dpi);
66  } else {
67    // Use default values if we cannot get valid values from the print dialog.
68    dpi = printing::kPixelsPerInch;
69    double page_width_in_pixel = printing::kLetterWidthInch * dpi;
70    double page_height_in_pixel = printing::kLetterHeightInch * dpi;
71    physical_size_device_units.SetSize(
72        static_cast<int>(page_width_in_pixel),
73        static_cast<int>(page_height_in_pixel));
74    printable_area_device_units.SetRect(
75        static_cast<int>(kLeftMarginInInch * dpi),
76        static_cast<int>(kTopMarginInInch * dpi),
77        page_width_in_pixel - (kLeftMarginInInch + kRightMarginInInch) * dpi,
78        page_height_in_pixel - (kTopMarginInInch + kBottomMarginInInch) * dpi);
79  }
80
81  print_settings->set_dpi(dpi);
82
83  // Note: With the normal GTK print dialog, when the user selects the landscape
84  // orientation, all that does is change the paper size. Which seems to be
85  // enough to render the right output and send it to the printer.
86  // The orientation value stays as portrait and does not actually affect
87  // printing.
88  // Thus this is only useful in print preview mode, where we manually set the
89  // orientation and change the paper size ourselves.
90  GtkPageOrientation orientation = gtk_print_settings_get_orientation(settings);
91  // Set before SetPrinterPrintableArea to make it flip area if necessary.
92  print_settings->SetOrientation(orientation == GTK_PAGE_ORIENTATION_LANDSCAPE);
93  DCHECK_EQ(print_settings->device_units_per_inch(), dpi);
94  print_settings->SetPrinterPrintableArea(physical_size_device_units,
95                                          printable_area_device_units,
96                                          true);
97}
98