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cef/tests/cefclient/print_handler_gtk.cpp

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// Copyright (c) 2014 The Chromium Embedded Framework Authors.
// Portions 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.
#include "cefclient/print_handler_gtk.h"
#include <vector>
#include "include/base/cef_logging.h"
#include "include/base/cef_macros.h"
#include "include/wrapper/cef_helpers.h"
namespace {
// CUPS Duplex attribute and values.
const char kCUPSDuplex[] = "cups-Duplex";
const char kDuplexNone[] = "None";
const char kDuplexTumble[] = "DuplexTumble";
const char kDuplexNoTumble[] = "DuplexNoTumble";
// CUPS color mode attribute and values.
const char kCUPSColorMode[] = "cups-ColorMode";
const char kCUPSColorModel[] = "cups-ColorModel";
const char kCUPSPrintoutMode[] = "cups-PrintoutMode";
const char kCUPSProcessColorModel[] = "cups-ProcessColorModel";
const char kBlack[] = "Black";
const char kCMYK[] = "CMYK";
const char kKCMY[] = "KCMY";
const char kCMY_K[] = "CMY+K";
const char kCMY[] = "CMY";
const char kColor[] = "Color";
const char kGray[] = "Gray";
const char kGrayscale[] = "Grayscale";
const char kGreyscale[] = "Greyscale";
const char kMonochrome[] = "Monochrome";
const char kNormal[] = "Normal";
const char kNormalGray[] = "Normal.Gray";
const char kRGB[] = "RGB";
const char kRGBA[] = "RGBA";
const char kRGB16[] = "RGB16";
// Default margin settings.
const double kTopMarginInInch = 0.25;
const double kBottomMarginInInch = 0.56;
const double kLeftMarginInInch = 0.25;
const double kRightMarginInInch = 0.25;
// Length of an inch in CSS's 1px unit.
// http://dev.w3.org/csswg/css3-values/#the-px-unit
const int kPixelsPerInch = 96;
// LETTER: 8.5 x 11 inches
const float kLetterWidthInch = 8.5f;
const float kLetterHeightInch = 11.0f;
class StickyPrintSettingGtk {
public:
StickyPrintSettingGtk() : last_used_settings_(gtk_print_settings_new()) {
}
~StickyPrintSettingGtk() {
NOTREACHED(); // The instance is intentionally leaked.
}
GtkPrintSettings* settings() {
return last_used_settings_;
}
void SetLastUsedSettings(GtkPrintSettings* settings) {
DCHECK(last_used_settings_);
g_object_unref(last_used_settings_);
last_used_settings_ = gtk_print_settings_copy(settings);
}
private:
GtkPrintSettings* last_used_settings_;
DISALLOW_COPY_AND_ASSIGN(StickyPrintSettingGtk);
};
// Lazily initialize the singleton instance.
StickyPrintSettingGtk* GetLastUsedSettings() {
static StickyPrintSettingGtk* settings = NULL;
if (!settings)
settings = new StickyPrintSettingGtk();
return settings;
}
// Helper class to track GTK printers.
class GtkPrinterList {
public:
GtkPrinterList() : default_printer_(NULL) {
gtk_enumerate_printers(SetPrinter, this, NULL, TRUE);
}
~GtkPrinterList() {
for (std::vector<GtkPrinter*>::iterator it = printers_.begin();
it < printers_.end(); ++it) {
g_object_unref(*it);
}
}
// Can return NULL if there's no default printer. E.g. Printer on a laptop
// is "home_printer", but the laptop is at work.
GtkPrinter* default_printer() {
return default_printer_;
}
// Can return NULL if the printer cannot be found due to:
// - Printer list out of sync with printer dialog UI.
// - Querying for non-existant printers like 'Print to PDF'.
GtkPrinter* GetPrinterWithName(const std::string& name) {
if (name.empty())
return NULL;
for (std::vector<GtkPrinter*>::iterator it = printers_.begin();
it < printers_.end(); ++it) {
if (gtk_printer_get_name(*it) == name) {
return *it;
}
}
return NULL;
}
private:
// Callback function used by gtk_enumerate_printers() to get all printer.
static gboolean SetPrinter(GtkPrinter* printer, gpointer data) {
GtkPrinterList* printer_list = reinterpret_cast<GtkPrinterList*>(data);
if (gtk_printer_is_default(printer))
printer_list->default_printer_ = printer;
g_object_ref(printer);
printer_list->printers_.push_back(printer);
return FALSE;
}
std::vector<GtkPrinter*> printers_;
GtkPrinter* default_printer_;
};
void GetColorModelForMode(CefPrintSettings::ColorModel color_mode,
std::string* color_setting_name,
std::string* color_value) {
color_setting_name->assign(kCUPSColorModel);
switch (color_mode) {
case COLOR_MODEL_COLOR:
color_value->assign(kColor);
break;
case COLOR_MODEL_CMYK:
color_value->assign(kCMYK);
break;
case COLOR_MODEL_PRINTOUTMODE_NORMAL:
color_value->assign(kNormal);
color_setting_name->assign(kCUPSPrintoutMode);
break;
case COLOR_MODEL_PRINTOUTMODE_NORMAL_GRAY:
color_value->assign(kNormalGray);
color_setting_name->assign(kCUPSPrintoutMode);
break;
case COLOR_MODEL_RGB16:
color_value->assign(kRGB16);
break;
case COLOR_MODEL_RGBA:
color_value->assign(kRGBA);
break;
case COLOR_MODEL_RGB:
color_value->assign(kRGB);
break;
case COLOR_MODEL_CMY:
color_value->assign(kCMY);
break;
case COLOR_MODEL_CMY_K:
color_value->assign(kCMY_K);
break;
case COLOR_MODEL_BLACK:
color_value->assign(kBlack);
break;
case COLOR_MODEL_GRAY:
color_value->assign(kGray);
break;
case COLOR_MODEL_COLORMODE_COLOR:
color_setting_name->assign(kCUPSColorMode);
color_value->assign(kColor);
break;
case COLOR_MODEL_COLORMODE_MONOCHROME:
color_setting_name->assign(kCUPSColorMode);
color_value->assign(kMonochrome);
break;
case COLOR_MODEL_HP_COLOR_COLOR:
color_setting_name->assign(kColor);
color_value->assign(kColor);
break;
case COLOR_MODEL_HP_COLOR_BLACK:
color_setting_name->assign(kColor);
color_value->assign(kBlack);
break;
case COLOR_MODEL_PROCESSCOLORMODEL_CMYK:
color_setting_name->assign(kCUPSProcessColorModel);
color_value->assign(kCMYK);
break;
case COLOR_MODEL_PROCESSCOLORMODEL_GREYSCALE:
color_setting_name->assign(kCUPSProcessColorModel);
color_value->assign(kGreyscale);
break;
case COLOR_MODEL_PROCESSCOLORMODEL_RGB:
color_setting_name->assign(kCUPSProcessColorModel);
color_value->assign(kRGB);
break;
default:
color_value->assign(kGrayscale);
break;
}
}
void InitPrintSettings(GtkPrintSettings* settings,
GtkPageSetup* page_setup,
CefRefPtr<CefPrintSettings> print_settings) {
DCHECK(settings);
DCHECK(page_setup);
std::string device_name;
const gchar* name = gtk_print_settings_get_printer(settings);
if (name)
device_name = name;
print_settings->SetDeviceName(device_name);
CefSize physical_size_device_units;
CefRect printable_area_device_units;
int dpi = gtk_print_settings_get_resolution(settings);
if (dpi) {
// Initialize page_setup_device_units_.
physical_size_device_units.Set(
gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH) * dpi,
gtk_page_setup_get_paper_height(page_setup, GTK_UNIT_INCH) * dpi);
printable_area_device_units.Set(
gtk_page_setup_get_left_margin(page_setup, GTK_UNIT_INCH) * dpi,
gtk_page_setup_get_top_margin(page_setup, GTK_UNIT_INCH) * dpi,
gtk_page_setup_get_page_width(page_setup, GTK_UNIT_INCH) * dpi,
gtk_page_setup_get_page_height(page_setup, GTK_UNIT_INCH) * dpi);
} else {
// Use default values if we cannot get valid values from the print dialog.
dpi = kPixelsPerInch;
double page_width_in_pixel = kLetterWidthInch * dpi;
double page_height_in_pixel = kLetterHeightInch * dpi;
physical_size_device_units.Set(
static_cast<int>(page_width_in_pixel),
static_cast<int>(page_height_in_pixel));
printable_area_device_units.Set(
static_cast<int>(kLeftMarginInInch * dpi),
static_cast<int>(kTopMarginInInch * dpi),
page_width_in_pixel - (kLeftMarginInInch + kRightMarginInInch) * dpi,
page_height_in_pixel - (kTopMarginInInch + kBottomMarginInInch) * dpi);
}
print_settings->SetDPI(dpi);
// Note: With the normal GTK print dialog, when the user selects the landscape
// orientation, all that does is change the paper size. Which seems to be
// enough to render the right output and send it to the printer.
// The orientation value stays as portrait and does not actually affect
// printing.
// Thus this is only useful in print preview mode, where we manually set the
// orientation and change the paper size ourselves.
GtkPageOrientation orientation = gtk_print_settings_get_orientation(settings);
// Set before SetPrinterPrintableArea to make it flip area if necessary.
print_settings->SetOrientation(orientation == GTK_PAGE_ORIENTATION_LANDSCAPE);
print_settings->SetPrinterPrintableArea(physical_size_device_units,
printable_area_device_units,
true);
}
} // namespace
ClientPrintHandlerGtk::ClientPrintHandlerGtk()
: dialog_(NULL),
gtk_settings_(NULL),
page_setup_(NULL),
printer_(NULL) {
}
void ClientPrintHandlerGtk::OnPrintSettings(
CefRefPtr<CefPrintSettings> settings,
bool get_defaults) {
if (get_defaults) {
DCHECK(!page_setup_);
DCHECK(!printer_);
// |gtk_settings_| is a new copy.
gtk_settings_ =
gtk_print_settings_copy(GetLastUsedSettings()->settings());
page_setup_ = gtk_page_setup_new();
} else {
if (!gtk_settings_) {
gtk_settings_ =
gtk_print_settings_copy(GetLastUsedSettings()->settings());
}
GtkPrinterList* printer_list = new GtkPrinterList;
printer_ = printer_list->GetPrinterWithName(settings->GetDeviceName());
if (printer_) {
g_object_ref(printer_);
gtk_print_settings_set_printer(gtk_settings_,
gtk_printer_get_name(printer_));
if (!page_setup_) {
page_setup_ = gtk_printer_get_default_page_size(printer_);
}
}
gtk_print_settings_set_n_copies(gtk_settings_, settings->GetCopies());
gtk_print_settings_set_collate(gtk_settings_, settings->WillCollate());
std::string color_value;
std::string color_setting_name;
GetColorModelForMode(settings->GetColorModel(), &color_setting_name,
&color_value);
gtk_print_settings_set(gtk_settings_, color_setting_name.c_str(),
color_value.c_str());
if (settings->GetDuplexMode() != DUPLEX_MODE_UNKNOWN) {
const char* cups_duplex_mode = NULL;
switch (settings->GetDuplexMode()) {
case DUPLEX_MODE_LONG_EDGE:
cups_duplex_mode = kDuplexNoTumble;
break;
case DUPLEX_MODE_SHORT_EDGE:
cups_duplex_mode = kDuplexTumble;
break;
case DUPLEX_MODE_SIMPLEX:
cups_duplex_mode = kDuplexNone;
break;
default: // UNKNOWN_DUPLEX_MODE
NOTREACHED();
break;
}
gtk_print_settings_set(gtk_settings_, kCUPSDuplex, cups_duplex_mode);
}
if (!page_setup_)
page_setup_ = gtk_page_setup_new();
gtk_print_settings_set_orientation(
gtk_settings_,
settings->IsLandscape() ? GTK_PAGE_ORIENTATION_LANDSCAPE :
GTK_PAGE_ORIENTATION_PORTRAIT);
delete printer_list;
}
InitPrintSettings(gtk_settings_, page_setup_, settings);
}
bool ClientPrintHandlerGtk::OnPrintDialog(
bool has_selection,
CefRefPtr<CefPrintDialogCallback> callback) {
dialog_callback_ = callback;
// TODO(cef): Identify the correct parent window.
GtkWindow* parent = NULL;
// TODO(estade): We need a window title here.
dialog_ = gtk_print_unix_dialog_new(NULL, parent);
g_signal_connect(dialog_, "delete-event",
G_CALLBACK(gtk_widget_hide_on_delete), NULL);
// Set modal so user cannot focus the same tab and press print again.
gtk_window_set_modal(GTK_WINDOW(dialog_), TRUE);
// Since we only generate PDF, only show printers that support PDF.
// TODO(thestig) Add more capabilities to support?
GtkPrintCapabilities cap = static_cast<GtkPrintCapabilities>(
GTK_PRINT_CAPABILITY_GENERATE_PDF |
GTK_PRINT_CAPABILITY_PAGE_SET |
GTK_PRINT_CAPABILITY_COPIES |
GTK_PRINT_CAPABILITY_COLLATE |
GTK_PRINT_CAPABILITY_REVERSE);
gtk_print_unix_dialog_set_manual_capabilities(GTK_PRINT_UNIX_DIALOG(dialog_),
cap);
gtk_print_unix_dialog_set_embed_page_setup(GTK_PRINT_UNIX_DIALOG(dialog_),
TRUE);
gtk_print_unix_dialog_set_support_selection(GTK_PRINT_UNIX_DIALOG(dialog_),
TRUE);
gtk_print_unix_dialog_set_has_selection(GTK_PRINT_UNIX_DIALOG(dialog_),
has_selection);
gtk_print_unix_dialog_set_settings(GTK_PRINT_UNIX_DIALOG(dialog_),
gtk_settings_);
g_signal_connect(dialog_, "response", G_CALLBACK(OnDialogResponseThunk),
this);
gtk_widget_show(dialog_);
return true;
}
bool ClientPrintHandlerGtk::OnPrintJob(
const CefString& document_name,
const CefString& pdf_file_path,
CefRefPtr<CefPrintJobCallback> callback) {
// If |printer_| is NULL then somehow the GTK printer list changed out under
// us. In which case, just bail out.
if (!printer_)
return false;
job_callback_ = callback;
// Save the settings for next time.
GetLastUsedSettings()->SetLastUsedSettings(gtk_settings_);
GtkPrintJob* print_job = gtk_print_job_new(
document_name.ToString().c_str(),
printer_,
gtk_settings_,
page_setup_);
gtk_print_job_set_source_file(print_job,
pdf_file_path.ToString().c_str(),
NULL);
gtk_print_job_send(print_job, OnJobCompletedThunk, this, NULL);
return true;
}
void ClientPrintHandlerGtk::OnPrintReset() {
if (dialog_) {
gtk_widget_destroy(dialog_);
dialog_ = NULL;
}
if (gtk_settings_) {
g_object_unref(gtk_settings_);
gtk_settings_ = NULL;
}
if (page_setup_) {
g_object_unref(page_setup_);
page_setup_ = NULL;
}
if (printer_) {
g_object_unref(printer_);
printer_ = NULL;
}
}
void ClientPrintHandlerGtk::OnDialogResponse(GtkDialog *dialog,
gint response_id) {
int num_matched_handlers = g_signal_handlers_disconnect_by_func(
dialog_, reinterpret_cast<gpointer>(&OnDialogResponseThunk), this);
DCHECK_EQ(1, num_matched_handlers);
gtk_widget_hide(dialog_);
switch (response_id) {
case GTK_RESPONSE_OK: {
if (gtk_settings_)
g_object_unref(gtk_settings_);
gtk_settings_ = gtk_print_unix_dialog_get_settings(
GTK_PRINT_UNIX_DIALOG(dialog_));
if (printer_)
g_object_unref(printer_);
printer_ = gtk_print_unix_dialog_get_selected_printer(
GTK_PRINT_UNIX_DIALOG(dialog_));
g_object_ref(printer_);
if (page_setup_)
g_object_unref(page_setup_);
page_setup_ = gtk_print_unix_dialog_get_page_setup(
GTK_PRINT_UNIX_DIALOG(dialog_));
g_object_ref(page_setup_);
// Handle page ranges.
CefPrintSettings::PageRangeList ranges_vector;
gint num_ranges;
bool print_selection_only = false;
switch (gtk_print_settings_get_print_pages(gtk_settings_)) {
case GTK_PRINT_PAGES_RANGES: {
GtkPageRange* gtk_range =
gtk_print_settings_get_page_ranges(gtk_settings_, &num_ranges);
if (gtk_range) {
for (int i = 0; i < num_ranges; ++i) {
ranges_vector.push_back(
CefPageRange(gtk_range[i].start, gtk_range[i].end));
}
g_free(gtk_range);
}
break;
}
case GTK_PRINT_PAGES_SELECTION:
print_selection_only = true;
break;
case GTK_PRINT_PAGES_ALL:
// Leave |ranges_vector| empty to indicate print all pages.
break;
case GTK_PRINT_PAGES_CURRENT:
default:
NOTREACHED();
break;
}
CefRefPtr<CefPrintSettings> settings = CefPrintSettings::Create();
settings->SetPageRanges(ranges_vector);
settings->SetSelectionOnly(print_selection_only);
InitPrintSettings(gtk_settings_, page_setup_, settings);
dialog_callback_->Continue(settings);
dialog_callback_ = NULL;
return;
}
case GTK_RESPONSE_DELETE_EVENT: // Fall through.
case GTK_RESPONSE_CANCEL: {
dialog_callback_->Cancel();
dialog_callback_ = NULL;
return;
}
case GTK_RESPONSE_APPLY:
default: {
NOTREACHED();
}
}
}
void ClientPrintHandlerGtk::OnJobCompleted(GtkPrintJob* print_job,
GError* error) {
job_callback_->Continue();
job_callback_ = NULL;
}
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