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gtk2/gtk/gtkprintoperation-portal.c
Benjamin Otte 43c212ac28 build: Enable -Wswitch-enum and -Wswitch-default 
This patch makes that work using 1 of 2 options:

1. Add all missing enums to the switch statement
  or
2. Cast the switch argument to a uint to avoid having to do that (mostly
   for GdkEventType).

I even found a bug while doing that: clearing a GtkImage with a surface
did not notify thae surface property.

The reason for enabling this flag even though it is tedious at times is
that it is very useful when adding values to an enum, because it makes
GTK immediately warn about all the switch statements where this enum is
relevant.
And I expect changes to enums to be frequent during the GTK4 development
cycle.
2017-10-06 21:23:39 +02:00

686 lines
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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 "gtkprintoperation-private.h"
#include "gtkprintoperation-portal.h"
#include "gtkprintsettings.h"
#include "gtkpagesetup.h"
#include "gtkprintbackend.h"
#include "gtkshow.h"
#include "gtkintl.h"
#include "gtkwindowprivate.h"
typedef struct {
GtkPrintOperation *op;
GDBusProxy *proxy;
guint response_signal_id;
gboolean do_print;
GtkPrintOperationResult result;
GtkPrintOperationPrintFunc print_cb;
GtkWindow *parent;
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;
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;
gdouble 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)
{
gdk_threads_leave ();
g_main_loop_run (op_portal->loop);
gdk_threads_enter ();
}
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;
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;
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;
char *filename;
char *uri;
int fd;
portal->result = GTK_PRINT_OPERATION_RESULT_APPLY;
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 ();
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);
}
else
portal->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
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)),
"org.freedesktop.portal.Desktop",
"org.freedesktop.portal.Request",
"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,
"org.freedesktop.portal.Desktop",
"/org/freedesktop/portal/desktop",
"org.freedesktop.portal.Print",
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;
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;
char *sender;
int i;
token = g_strdup_printf ("gtk%d", g_random_int_range (0, G_MAXINT));
sender = g_strdup (g_dbus_connection_get_unique_name (g_dbus_proxy_get_connection (portal->proxy)) + 1);
for (i = 0; sender[i]; i++)
if (sender[i] == '.')
sender[i] = '_';
portal->prepare_print_handle = g_strdup_printf ("/org/fredesktop/portal/desktop/request/%s/%s", sender, token);
g_free (sender);
portal->response_signal_id =
g_dbus_connection_signal_subscribe (g_dbus_proxy_get_connection (G_DBUS_PROXY (portal->proxy)),
"org.freedesktop.portal.Desktop",
"org.freedesktop.portal.Request",
"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);
gdk_threads_leave ();
g_main_loop_run (portal->loop);
gdk_threads_enter ();
*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)
{
char *uri;
uri = g_filename_to_uri (filename, NULL, NULL);
gtk_show_uri_on_window (parent, uri, GDK_CURRENT_TIME, NULL);
g_free (uri);
}
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