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Learning_GTK4_tree/gtk/print/gtkprintoperation-portal.c

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/* GTK - The GIMP Toolkit
* gtkprintoperation-portal.c: Print Operation Details for sandboxed apps
* Copyright (C) 2016, Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cairo-pdf.h>
#include <cairo-ps.h>
#include <gio/gunixfdlist.h>
#include <glib/gi18n-lib.h>
#include <gtk/gtk.h>
#include "gtkwindowprivate.h"
#include "gtkprintoperation-private.h"
#include "gtkprintoperation-portal.h"
#include "gtkprintsettings.h"
#include "gtkpagesetup.h"
#include "gtkprintbackendprivate.h"
#define PORTAL_BUS_NAME "org.freedesktop.portal.Desktop"
#define PORTAL_OBJECT_PATH "/org/freedesktop/portal/desktop"
#define PORTAL_REQUEST_INTERFACE "org.freedesktop.portal.Request"
#define PORTAL_PRINT_INTERFACE "org.freedesktop.portal.Print"
static char *
get_portal_request_path (GDBusConnection *connection,
char **token)
{
char *sender;
int i;
char *path;
*token = g_strdup_printf ("gtk%d", g_random_int_range (0, G_MAXINT));
/* +1 to skip the leading : */
sender = g_strdup (g_dbus_connection_get_unique_name (connection) + 1);
for (i = 0; sender[i]; i++)
if (sender[i] == '.')
sender[i] = '_';
path = g_strconcat (PORTAL_OBJECT_PATH, "/request/", sender, "/", *token, NULL);
g_free (sender);
return path;
}
typedef struct {
GtkPrintOperation *op;
GDBusProxy *proxy;
guint response_signal_id;
gboolean do_print;
GtkPrintOperationResult result;
GtkPrintOperationPrintFunc print_cb;
GtkWindow *parent;
char *handle;
GMainLoop *loop;
guint32 token;
GDestroyNotify destroy;
GVariant *settings;
GVariant *setup;
GVariant *options;
char *prepare_print_handle;
} PortalData;
static void
portal_data_free (gpointer data)
{
PortalData *portal = data;
if (portal->parent && portal->handle)
gtk_window_unexport_handle (portal->parent, portal->handle);
g_free (portal->handle);
g_object_unref (portal->op);
g_object_unref (portal->proxy);
if (portal->loop)
g_main_loop_unref (portal->loop);
if (portal->settings)
g_variant_unref (portal->settings);
if (portal->setup)
g_variant_unref (portal->setup);
if (portal->options)
g_variant_unref (portal->options);
g_free (portal->prepare_print_handle);
g_free (portal);
}
typedef struct {
GDBusProxy *proxy;
GtkPrintJob *job;
guint32 token;
cairo_surface_t *surface;
GMainLoop *loop;
gboolean file_written;
} GtkPrintOperationPortal;
static void
op_portal_free (GtkPrintOperationPortal *op_portal)
{
g_clear_object (&op_portal->proxy);
g_clear_object (&op_portal->job);
if (op_portal->loop)
g_main_loop_unref (op_portal->loop);
g_free (op_portal);
}
static void
portal_start_page (GtkPrintOperation *op,
GtkPrintContext *print_context,
GtkPageSetup *page_setup)
{
GtkPrintOperationPortal *op_portal = op->priv->platform_data;
GtkPaperSize *paper_size;
cairo_surface_type_t type;
double w, h;
paper_size = gtk_page_setup_get_paper_size (page_setup);
w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
type = cairo_surface_get_type (op_portal->surface);
if ((op->priv->manual_number_up < 2) ||
(op->priv->page_position % op->priv->manual_number_up == 0))
{
if (type == CAIRO_SURFACE_TYPE_PS)
{
cairo_ps_surface_set_size (op_portal->surface, w, h);
cairo_ps_surface_dsc_begin_page_setup (op_portal->surface);
switch (gtk_page_setup_get_orientation (page_setup))
{
case GTK_PAGE_ORIENTATION_PORTRAIT:
case GTK_PAGE_ORIENTATION_REVERSE_PORTRAIT:
cairo_ps_surface_dsc_comment (op_portal->surface, "%%PageOrientation: Portrait");
break;
case GTK_PAGE_ORIENTATION_LANDSCAPE:
case GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE:
cairo_ps_surface_dsc_comment (op_portal->surface, "%%PageOrientation: Landscape");
break;
default:
break;
}
}
else if (type == CAIRO_SURFACE_TYPE_PDF)
{
if (!op->priv->manual_orientation)
{
w = gtk_page_setup_get_paper_width (page_setup, GTK_UNIT_POINTS);
h = gtk_page_setup_get_paper_height (page_setup, GTK_UNIT_POINTS);
}
cairo_pdf_surface_set_size (op_portal->surface, w, h);
}
}
}
static void
portal_end_page (GtkPrintOperation *op,
GtkPrintContext *print_context)
{
cairo_t *cr;
cr = gtk_print_context_get_cairo_context (print_context);
if ((op->priv->manual_number_up < 2) ||
((op->priv->page_position + 1) % op->priv->manual_number_up == 0) ||
(op->priv->page_position == op->priv->nr_of_pages_to_print - 1))
cairo_show_page (cr);
}
static void
print_file_done (GObject *source,
GAsyncResult *result,
gpointer data)
{
GtkPrintOperation *op = data;
GtkPrintOperationPortal *op_portal = op->priv->platform_data;
GError *error = NULL;
GVariant *ret;
ret = g_dbus_proxy_call_finish (op_portal->proxy,
result,
&error);
if (ret == NULL)
{
if (op->priv->error == NULL)
op->priv->error = g_error_copy (error);
g_warning ("Print file failed: %s", error->message);
g_error_free (error);
}
else
g_variant_unref (ret);
if (op_portal->loop)
g_main_loop_quit (op_portal->loop);
g_object_unref (op);
}
static void
portal_job_complete (GtkPrintJob *job,
gpointer data,
const GError *error)
{
GtkPrintOperation *op = data;
GtkPrintOperationPortal *op_portal = op->priv->platform_data;
GtkPrintSettings *settings;
const char *uri;
char *filename;
int fd, idx;
GVariantBuilder opt_builder;
GUnixFDList *fd_list;
if (error != NULL && op->priv->error == NULL)
{
g_warning ("Print job failed: %s", error->message);
op->priv->error = g_error_copy (error);
return;
}
op_portal->file_written = TRUE;
settings = gtk_print_job_get_settings (job);
uri = gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_URI);
filename = g_filename_from_uri (uri, NULL, NULL);
fd = open (filename, O_RDONLY|O_CLOEXEC);
fd_list = g_unix_fd_list_new ();
idx = g_unix_fd_list_append (fd_list, fd, NULL);
close (fd);
g_free (filename);
g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add (&opt_builder, "{sv}", "token", g_variant_new_uint32 (op_portal->token));
g_dbus_proxy_call_with_unix_fd_list (op_portal->proxy,
"Print",
g_variant_new ("(ssh@a{sv})",
"", /* window */
_("Print"), /* title */
idx,
g_variant_builder_end (&opt_builder)),
G_DBUS_CALL_FLAGS_NONE,
-1,
fd_list,
NULL,
print_file_done,
op);
g_object_unref (fd_list);
}
static void
portal_end_run (GtkPrintOperation *op,
gboolean wait,
gboolean cancelled)
{
GtkPrintOperationPortal *op_portal = op->priv->platform_data;
cairo_surface_finish (op_portal->surface);
if (cancelled)
return;
if (wait)
op_portal->loop = g_main_loop_new (NULL, FALSE);
/* TODO: Check for error */
if (op_portal->job != NULL)
{
g_object_ref (op);
gtk_print_job_send (op_portal->job, portal_job_complete, op, NULL);
}
if (wait)
{
g_object_ref (op);
if (!op_portal->file_written)
g_main_loop_run (op_portal->loop);
g_object_unref (op);
}
}
static void
finish_print (PortalData *portal,
GtkPrinter *printer,
GtkPageSetup *page_setup,
GtkPrintSettings *settings)
{
GtkPrintOperation *op = portal->op;
GtkPrintOperationPrivate *priv = op->priv;
GtkPrintJob *job;
GtkPrintOperationPortal *op_portal;
cairo_t *cr;
if (portal->do_print)
{
gtk_print_operation_set_print_settings (op, settings);
priv->print_context = _gtk_print_context_new (op);
_gtk_print_context_set_hard_margins (priv->print_context, 0, 0, 0, 0);
gtk_print_operation_set_default_page_setup (op, page_setup);
_gtk_print_context_set_page_setup (priv->print_context, page_setup);
op_portal = g_new0 (GtkPrintOperationPortal, 1);
priv->platform_data = op_portal;
priv->free_platform_data = (GDestroyNotify) op_portal_free;
priv->start_page = portal_start_page;
priv->end_page = portal_end_page;
priv->end_run = portal_end_run;
job = gtk_print_job_new (priv->job_name, printer, settings, page_setup);
op_portal->job = job;
op_portal->proxy = g_object_ref (portal->proxy);
op_portal->token = portal->token;
op_portal->surface = gtk_print_job_get_surface (job, &priv->error);
if (op_portal->surface == NULL)
{
portal->result = GTK_PRINT_OPERATION_RESULT_ERROR;
portal->do_print = FALSE;
goto out;
}
cr = cairo_create (op_portal->surface);
gtk_print_context_set_cairo_context (priv->print_context, cr, 72, 72);
cairo_destroy (cr);
priv->print_pages = gtk_print_job_get_pages (job);
priv->page_ranges = gtk_print_job_get_page_ranges (job, &priv->num_page_ranges);
priv->manual_num_copies = gtk_print_job_get_num_copies (job);
priv->manual_collation = gtk_print_job_get_collate (job);
priv->manual_reverse = gtk_print_job_get_reverse (job);
priv->manual_page_set = gtk_print_job_get_page_set (job);
priv->manual_scale = gtk_print_job_get_scale (job);
priv->manual_orientation = gtk_print_job_get_rotate (job);
priv->manual_number_up = gtk_print_job_get_n_up (job);
priv->manual_number_up_layout = gtk_print_job_get_n_up_layout (job);
}
out:
if (portal->print_cb)
portal->print_cb (op, portal->parent, portal->do_print, portal->result);
if (portal->destroy)
portal->destroy (portal);
}
static GtkPrinter *
find_file_printer (void)
{
GList *backends, *l, *printers;
GtkPrinter *printer;
printer = NULL;
backends = gtk_print_backend_load_modules ();
for (l = backends; l; l = l->next)
{
GtkPrintBackend *backend = l->data;
/* FIXME: this needs changes for cpdb */
if (strcmp (G_OBJECT_TYPE_NAME (backend), "GtkPrintBackendFile") == 0)
{
printers = gtk_print_backend_get_printer_list (backend);
printer = printers->data;
g_list_free (printers);
break;
}
}
g_list_free (backends);
return printer;
}
static void
prepare_print_response (GDBusConnection *connection,
const char *sender_name,
const char *object_path,
const char *interface_name,
const char *signal_name,
GVariant *parameters,
gpointer data)
{
PortalData *portal = data;
guint32 response;
GVariant *options = NULL;
if (portal->response_signal_id != 0)
{
g_dbus_connection_signal_unsubscribe (connection,
portal->response_signal_id);
portal->response_signal_id = 0;
}
g_variant_get (parameters, "(u@a{sv})", &response, &options);
portal->do_print = (response == 0);
if (portal->do_print)
{
GVariant *v;
GtkPrintSettings *settings;
GtkPageSetup *page_setup;
GtkPrinter *printer;
v = g_variant_lookup_value (options, "settings", G_VARIANT_TYPE_VARDICT);
settings = gtk_print_settings_new_from_gvariant (v);
g_variant_unref (v);
v = g_variant_lookup_value (options, "page-setup", G_VARIANT_TYPE_VARDICT);
page_setup = gtk_page_setup_new_from_gvariant (v);
g_variant_unref (v);
g_variant_lookup (options, "token", "u", &portal->token);
printer = find_file_printer ();
if (printer)
{
char *filename;
int fd;
char *uri;
fd = g_file_open_tmp ("gtkprintXXXXXX", &filename, NULL);
uri = g_filename_to_uri (filename, NULL, NULL);
gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_OUTPUT_URI, uri);
g_free (uri);
close (fd);
finish_print (portal, printer, page_setup, settings);
g_free (filename);
portal->result = GTK_PRINT_OPERATION_RESULT_APPLY;
}
else
{
portal->do_print = FALSE;
portal->result = GTK_PRINT_OPERATION_RESULT_ERROR;
}
}
else
{
portal->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
if (portal->print_cb)
portal->print_cb (portal->op, portal->parent, portal->do_print, portal->result);
if (portal->destroy)
portal->destroy (portal);
}
if (options)
g_variant_unref (options);
if (portal->loop)
g_main_loop_quit (portal->loop);
}
static void
prepare_print_called (GObject *source,
GAsyncResult *result,
gpointer data)
{
PortalData *portal = data;
GError *error = NULL;
const char *handle = NULL;
GVariant *ret;
ret = g_dbus_proxy_call_finish (portal->proxy, result, &error);
if (ret == NULL)
{
if (portal->op->priv->error == NULL)
portal->op->priv->error = g_error_copy (error);
g_error_free (error);
if (portal->loop)
g_main_loop_quit (portal->loop);
return;
}
else
g_variant_get (ret, "(&o)", &handle);
if (strcmp (portal->prepare_print_handle, handle) != 0)
{
g_free (portal->prepare_print_handle);
portal->prepare_print_handle = g_strdup (handle);
g_dbus_connection_signal_unsubscribe (g_dbus_proxy_get_connection (G_DBUS_PROXY (portal->proxy)),
portal->response_signal_id);
portal->response_signal_id =
g_dbus_connection_signal_subscribe (g_dbus_proxy_get_connection (G_DBUS_PROXY (portal->proxy)),
PORTAL_BUS_NAME,
PORTAL_REQUEST_INTERFACE,
"Response",
handle,
NULL,
G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
prepare_print_response,
portal, NULL);
}
g_variant_unref (ret);
}
static PortalData *
create_portal_data (GtkPrintOperation *op,
GtkWindow *parent,
GtkPrintOperationPrintFunc print_cb)
{
GDBusProxy *proxy;
PortalData *portal;
guint signal_id;
GError *error = NULL;
signal_id = g_signal_lookup ("create-custom-widget", GTK_TYPE_PRINT_OPERATION);
if (g_signal_has_handler_pending (op, signal_id, 0, TRUE))
g_warning ("GtkPrintOperation::create-custom-widget not supported with portal");
proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
PORTAL_BUS_NAME,
PORTAL_OBJECT_PATH,
PORTAL_PRINT_INTERFACE,
NULL,
&error);
if (proxy == NULL)
{
if (op->priv->error == NULL)
op->priv->error = g_error_copy (error);
g_error_free (error);
return NULL;
}
portal = g_new0 (PortalData, 1);
portal->proxy = proxy;
portal->op = g_object_ref (op);
portal->parent = parent;
portal->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
portal->print_cb = print_cb;
if (print_cb) /* async case */
{
portal->loop = NULL;
portal->destroy = portal_data_free;
}
else
{
portal->loop = g_main_loop_new (NULL, FALSE);
portal->destroy = NULL;
}
return portal;
}
static void
window_handle_exported (GtkWindow *window,
const char *handle_str,
gpointer user_data)
{
PortalData *portal = user_data;
portal->handle = g_strdup (handle_str);
g_dbus_proxy_call (portal->proxy,
"PreparePrint",
g_variant_new ("(ss@a{sv}@a{sv}@a{sv})",
handle_str,
_("Print"), /* title */
portal->settings,
portal->setup,
portal->options),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
prepare_print_called,
portal);
}
static void
call_prepare_print (GtkPrintOperation *op,
PortalData *portal)
{
GtkPrintOperationPrivate *priv = op->priv;
GVariantBuilder opt_builder;
char *token;
portal->prepare_print_handle =
get_portal_request_path (g_dbus_proxy_get_connection (portal->proxy), &token);
portal->response_signal_id =
g_dbus_connection_signal_subscribe (g_dbus_proxy_get_connection (G_DBUS_PROXY (portal->proxy)),
PORTAL_BUS_NAME,
PORTAL_REQUEST_INTERFACE,
"Response",
portal->prepare_print_handle,
NULL,
G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
prepare_print_response,
portal, NULL);
g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add (&opt_builder, "{sv}", "handle_token", g_variant_new_string (token));
g_free (token);
portal->options = g_variant_builder_end (&opt_builder);
if (priv->print_settings)
portal->settings = gtk_print_settings_to_gvariant (priv->print_settings);
else
{
GVariantBuilder builder;
g_variant_builder_init (&builder, G_VARIANT_TYPE_VARDICT);
portal->settings = g_variant_builder_end (&builder);
}
if (priv->default_page_setup)
portal->setup = gtk_page_setup_to_gvariant (priv->default_page_setup);
else
{
GtkPageSetup *page_setup = gtk_page_setup_new ();
portal->setup = gtk_page_setup_to_gvariant (page_setup);
g_object_unref (page_setup);
}
g_variant_ref_sink (portal->options);
g_variant_ref_sink (portal->settings);
g_variant_ref_sink (portal->setup);
if (portal->parent != NULL &&
gtk_widget_is_visible (GTK_WIDGET (portal->parent)) &&
gtk_window_export_handle (portal->parent, window_handle_exported, portal))
return;
g_dbus_proxy_call (portal->proxy,
"PreparePrint",
g_variant_new ("(ss@a{sv}@a{sv}@a{sv})",
"",
_("Print"), /* title */
portal->settings,
portal->setup,
portal->options),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
prepare_print_called,
portal);
}
GtkPrintOperationResult
gtk_print_operation_portal_run_dialog (GtkPrintOperation *op,
gboolean show_dialog,
GtkWindow *parent,
gboolean *do_print)
{
PortalData *portal;
GtkPrintOperationResult result;
portal = create_portal_data (op, parent, NULL);
if (portal == NULL)
return GTK_PRINT_OPERATION_RESULT_ERROR;
call_prepare_print (op, portal);
g_main_loop_run (portal->loop);
*do_print = portal->do_print;
result = portal->result;
portal_data_free (portal);
return result;
}
void
gtk_print_operation_portal_run_dialog_async (GtkPrintOperation *op,
gboolean show_dialog,
GtkWindow *parent,
GtkPrintOperationPrintFunc print_cb)
{
PortalData *portal;
portal = create_portal_data (op, parent, print_cb);
if (portal == NULL)
return;
call_prepare_print (op, portal);
}
void
gtk_print_operation_portal_launch_preview (GtkPrintOperation *op,
cairo_surface_t *surface,
GtkWindow *parent,
const char *filename)
{
GFile *file;
GtkFileLauncher *launcher;
file = g_file_new_for_path (filename);
launcher = gtk_file_launcher_new (file);
gtk_file_launcher_launch (launcher, parent, NULL, NULL, NULL);
g_object_unref (launcher);
g_object_unref (file);
}
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