cefpython/src/subprocess/print_handler_gtk.cpp at cefpython66 · PythonNexus/cefpython · GitHub

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// COPIED from upstream "cef/tests/cefclient/browser/" directory

// with minor modifications. See the .patch file in current directory.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

#include "print_handler_gtk.h"

#include <vector>

#include <gtk/gtk.h>

#include <gtk/gtkunixprint.h>

#include "include/base/cef_bind.h"

#include "include/base/cef_logging.h"

#include "include/base/cef_macros.h"

#include "include/wrapper/cef_helpers.h"

#include "include/wrapper/cef_closure_task.h"

#include "client_handler/x11.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 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

struct ClientPrintHandlerGtk::PrintHandler {

PrintHandler(CefRefPtr<CefBrowser> browser)

: browser_(browser),

dialog_(NULL),

gtk_settings_(NULL),

page_setup_(NULL),

printer_(NULL) {}

~PrintHandler() {

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 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 OnPrintDialog(bool has_selection,

CefRefPtr<CefPrintDialogCallback> callback) {

dialog_callback_ = callback;

GtkWindow* parent = CefBrowser_GetGtkWindow(browser_);

// 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 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;

}

private:

void 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(

CefRange(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 OnJobCompleted(GtkPrintJob* print_job, GError* error) {

// Continue() will result in a call to ClientPrintHandlerGtk::OnPrintReset

// which deletes |this|. Execute it asnychronously so the call stack has a

// chance to unwind.

CefPostTask(TID_UI, base::Bind(&CefPrintJobCallback::Continue,

job_callback_.get()));

job_callback_ = NULL;

}

static void OnDialogResponseThunk(GtkDialog* dialog,

gint response_id,

PrintHandler* handler) {

handler->OnDialogResponse(dialog, response_id);

}

static void OnJobCompletedThunk(GtkPrintJob* print_job,

void* handler,

GError* error) {

static_cast<PrintHandler*>(handler)->OnJobCompleted(print_job, error);

}

CefRefPtr<CefBrowser> browser_;

GtkWidget* dialog_; // Owned.

GtkPrintSettings* gtk_settings_; // Referenced.

GtkPageSetup* page_setup_; // Referenced.

GtkPrinter* printer_; // Referenced.

CefRefPtr<CefPrintDialogCallback> dialog_callback_;

CefRefPtr<CefPrintJobCallback> job_callback_;

};

ClientPrintHandlerGtk::ClientPrintHandlerGtk() {}

ClientPrintHandlerGtk::~ClientPrintHandlerGtk() {

DCHECK(print_handler_map_.empty());

}

void ClientPrintHandlerGtk::OnPrintStart(CefRefPtr<CefBrowser> browser) {

CEF_REQUIRE_UI_THREAD();

const int browser_id = browser->GetIdentifier();

#ifndef _NDEBUG

// Print handler should not already exist for the browser.

PrintHandlerMap::const_iterator it = print_handler_map_.find(browser_id);

DCHECK(it == print_handler_map_.end());

#endif

// Create a new print handler.

PrintHandler* ph = new PrintHandler(browser);

print_handler_map_.insert(std::make_pair(browser_id, ph));

}

void ClientPrintHandlerGtk::OnPrintSettings(

CefRefPtr<CefBrowser> browser,

CefRefPtr<CefPrintSettings> settings,

bool get_defaults) {

CEF_REQUIRE_UI_THREAD();

GetPrintHandler(browser)->OnPrintSettings(settings, get_defaults);

}

bool ClientPrintHandlerGtk::OnPrintDialog(

CefRefPtr<CefBrowser> browser,

bool has_selection,

CefRefPtr<CefPrintDialogCallback> callback) {

CEF_REQUIRE_UI_THREAD();

return GetPrintHandler(browser)->OnPrintDialog(has_selection, callback);

}

bool ClientPrintHandlerGtk::OnPrintJob(

CefRefPtr<CefBrowser> browser,

const CefString& document_name,

const CefString& pdf_file_path,

CefRefPtr<CefPrintJobCallback> callback) {

CEF_REQUIRE_UI_THREAD();

return GetPrintHandler(browser)->OnPrintJob(document_name, pdf_file_path,

callback);

}

void ClientPrintHandlerGtk::OnPrintReset(CefRefPtr<CefBrowser> browser) {

CEF_REQUIRE_UI_THREAD();

// Delete the print handler.

PrintHandlerMap::iterator it =

print_handler_map_.find(browser->GetIdentifier());

DCHECK(it != print_handler_map_.end());

delete it->second;

print_handler_map_.erase(it);

}

CefSize ClientPrintHandlerGtk::GetPdfPaperSize(int device_units_per_inch) {

CEF_REQUIRE_UI_THREAD();

GtkPageSetup* page_setup = gtk_page_setup_new();

float width = gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH);

float height = gtk_page_setup_get_paper_height(page_setup, GTK_UNIT_INCH);

g_object_unref(page_setup);

return CefSize(width * device_units_per_inch, height * device_units_per_inch);

}

ClientPrintHandlerGtk::PrintHandler* ClientPrintHandlerGtk::GetPrintHandler(

CefRefPtr<CefBrowser> browser) {

PrintHandlerMap::const_iterator it =

print_handler_map_.find(browser->GetIdentifier());

DCHECK(it != print_handler_map_.end());

return it->second;

}

cefpython/src/subprocess/print_handler_gtk.cpp at cefpython66 · PythonNexus/cefpython · GitHub

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