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gtk2/gtk/gtkprintbackend.c
Matthias Clasen f339cc276c gtk: Stop using gtk_widget_show/hide 
gtk_widget_set_visible and gtk_window_present
are better alternatives, and calling gtk_widget_show
on newly created widgets is no longer necessary
anyway.
2022-11-28 14:34:55 -05:00

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/* GTK - The GIMP Toolkit
* gtkprintbackendprivate.h: Abstract printer backend interfaces
* Copyright (C) 2003, 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 <gmodule.h>
#include <glib/gi18n-lib.h>
#include "gtkdebug.h"
#include "gtkmodulesprivate.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkprintbackendprivate.h"
static void gtk_print_backend_finalize (GObject *object);
static void gtk_print_backend_dispose (GObject *object);
static void gtk_print_backend_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_print_backend_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
struct _GtkPrintBackendPrivate
{
GListStore *printers;
guint printer_list_requested : 1;
guint printer_list_done : 1;
GtkPrintBackendStatus status;
char **auth_info_required;
char **auth_info;
gboolean store_auth_info;
};
enum {
PRINTER_LIST_CHANGED,
PRINTER_LIST_DONE,
PRINTER_ADDED,
PRINTER_REMOVED,
PRINTER_STATUS_CHANGED,
REQUEST_PASSWORD,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
enum
{
PROP_ZERO,
PROP_STATUS
};
static GObjectClass *backend_parent_class;
GQuark
gtk_print_backend_error_quark (void)
{
static GQuark quark = 0;
if (quark == 0)
quark = g_quark_from_static_string ("gtk-print-backend-error-quark");
return quark;
}
void
gtk_print_backends_init (void)
{
GIOExtensionPoint *ep;
GIOModuleScope *scope;
char **paths;
int i;
GTK_DEBUG (MODULES, "Registering extension point %s", GTK_PRINT_BACKEND_EXTENSION_POINT_NAME);
ep = g_io_extension_point_register (GTK_PRINT_BACKEND_EXTENSION_POINT_NAME);
g_io_extension_point_set_required_type (ep, GTK_TYPE_PRINT_BACKEND);
scope = g_io_module_scope_new (G_IO_MODULE_SCOPE_BLOCK_DUPLICATES);
paths = _gtk_get_module_path ("printbackends");
for (i = 0; paths[i]; i++)
{
GTK_DEBUG (MODULES, "Scanning io modules in %s", paths[i]);
g_io_modules_scan_all_in_directory_with_scope (paths[i], scope);
}
g_strfreev (paths);
g_io_module_scope_free (scope);
if (GTK_DEBUG_CHECK (MODULES))
{
GList *list, *l;
list = g_io_extension_point_get_extensions (ep);
for (l = list; l; l = l->next)
{
GIOExtension *ext = l->data;
g_print ("extension: %s: type %s\n",
g_io_extension_get_name (ext),
g_type_name (g_io_extension_get_type (ext)));
}
}
}
/**
* gtk_print_backend_load_modules:
*
* Returns: (element-type GtkPrintBackend) (transfer container):
*/
GList *
gtk_print_backend_load_modules (void)
{
GList *result;
GtkPrintBackend *backend;
char *setting;
char **backends;
int i;
GtkSettings *settings;
GIOExtensionPoint *ep;
result = NULL;
ep = g_io_extension_point_lookup (GTK_PRINT_BACKEND_EXTENSION_POINT_NAME);
settings = gtk_settings_get_default ();
if (settings)
g_object_get (settings, "gtk-print-backends", &setting, NULL);
else
setting = g_strdup (GTK_PRINT_BACKENDS);
backends = g_strsplit (setting, ",", -1);
for (i = 0; backends[i]; i++)
{
GIOExtension *ext;
GType type;
ext = g_io_extension_point_get_extension_by_name (ep, backends[i]);
if (!ext)
continue;
GTK_DEBUG (PRINTING, "Found %s print backend", backends[i]);
type = g_io_extension_get_type (ext);
backend = g_object_new (type, NULL);
result = g_list_append (result, backend);
}
g_strfreev (backends);
g_free (setting);
return result;
}
/*****************************************
* GtkPrintBackend *
*****************************************/
G_DEFINE_TYPE_WITH_PRIVATE (GtkPrintBackend, gtk_print_backend, G_TYPE_OBJECT)
static void fallback_printer_request_details (GtkPrinter *printer);
static gboolean fallback_printer_mark_conflicts (GtkPrinter *printer,
GtkPrinterOptionSet *options);
static gboolean fallback_printer_get_hard_margins (GtkPrinter *printer,
double *top,
double *bottom,
double *left,
double *right);
static gboolean fallback_printer_get_hard_margins_for_paper_size (GtkPrinter *printer,
GtkPaperSize *paper_size,
double *top,
double *bottom,
double *left,
double *right);
static GList * fallback_printer_list_papers (GtkPrinter *printer);
static GtkPageSetup * fallback_printer_get_default_page_size (GtkPrinter *printer);
static GtkPrintCapabilities fallback_printer_get_capabilities (GtkPrinter *printer);
static void request_password (GtkPrintBackend *backend,
gpointer auth_info_required,
gpointer auth_info_default,
gpointer auth_info_display,
gpointer auth_info_visible,
const char *prompt,
gboolean can_store_auth_info);
static void
gtk_print_backend_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkPrintBackend *backend = GTK_PRINT_BACKEND (object);
GtkPrintBackendPrivate *priv = backend->priv;
switch (prop_id)
{
case PROP_STATUS:
priv->status = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_print_backend_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkPrintBackend *backend = GTK_PRINT_BACKEND (object);
GtkPrintBackendPrivate *priv = backend->priv;
switch (prop_id)
{
case PROP_STATUS:
g_value_set_int (value, priv->status);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_print_backend_class_init (GtkPrintBackendClass *class)
{
GObjectClass *object_class;
object_class = (GObjectClass *) class;
backend_parent_class = g_type_class_peek_parent (class);
object_class->finalize = gtk_print_backend_finalize;
object_class->dispose = gtk_print_backend_dispose;
object_class->set_property = gtk_print_backend_set_property;
object_class->get_property = gtk_print_backend_get_property;
class->printer_request_details = fallback_printer_request_details;
class->printer_mark_conflicts = fallback_printer_mark_conflicts;
class->printer_get_hard_margins = fallback_printer_get_hard_margins;
class->printer_get_hard_margins_for_paper_size = fallback_printer_get_hard_margins_for_paper_size;
class->printer_list_papers = fallback_printer_list_papers;
class->printer_get_default_page_size = fallback_printer_get_default_page_size;
class->printer_get_capabilities = fallback_printer_get_capabilities;
class->request_password = request_password;
g_object_class_install_property (object_class,
PROP_STATUS,
g_param_spec_int ("status", NULL, NULL,
GTK_PRINT_BACKEND_STATUS_UNKNOWN,
GTK_PRINT_BACKEND_STATUS_UNAVAILABLE,
GTK_PRINT_BACKEND_STATUS_UNKNOWN,
GTK_PARAM_READWRITE));
signals[PRINTER_LIST_CHANGED] =
g_signal_new (I_("printer-list-changed"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, printer_list_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
signals[PRINTER_LIST_DONE] =
g_signal_new (I_("printer-list-done"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, printer_list_done),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
signals[PRINTER_ADDED] =
g_signal_new (I_("printer-added"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, printer_added),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
signals[PRINTER_REMOVED] =
g_signal_new (I_("printer-removed"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, printer_removed),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
signals[PRINTER_STATUS_CHANGED] =
g_signal_new (I_("printer-status-changed"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, printer_status_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
signals[REQUEST_PASSWORD] =
g_signal_new (I_("request-password"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintBackendClass, request_password),
NULL, NULL, NULL,
G_TYPE_NONE, 6, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER,
G_TYPE_POINTER, G_TYPE_STRING, G_TYPE_BOOLEAN);
}
static void
gtk_print_backend_init (GtkPrintBackend *backend)
{
GtkPrintBackendPrivate *priv;
priv = backend->priv = gtk_print_backend_get_instance_private (backend);
priv->printers = g_list_store_new (GTK_TYPE_PRINTER);
priv->auth_info_required = NULL;
priv->auth_info = NULL;
}
static void
gtk_print_backend_dispose (GObject *object)
{
GtkPrintBackend *backend;
GtkPrintBackendPrivate *priv;
backend = GTK_PRINT_BACKEND (object);
priv = backend->priv;
/* We unref the printers in dispose, not in finalize so that
* we can break refcount cycles with gtk_print_backend_destroy
*/
g_list_store_remove_all (priv->printers);
backend_parent_class->dispose (object);
}
static void
gtk_print_backend_finalize (GObject *object)
{
GtkPrintBackend *backend = GTK_PRINT_BACKEND (object);
GtkPrintBackendPrivate *priv = backend->priv;
g_clear_object (&priv->printers);
backend_parent_class->finalize (object);
}
static void
fallback_printer_request_details (GtkPrinter *printer)
{
}
static gboolean
fallback_printer_mark_conflicts (GtkPrinter *printer,
GtkPrinterOptionSet *options)
{
return FALSE;
}
static gboolean
fallback_printer_get_hard_margins (GtkPrinter *printer,
double *top,
double *bottom,
double *left,
double *right)
{
return FALSE;
}
static gboolean
fallback_printer_get_hard_margins_for_paper_size (GtkPrinter *printer,
GtkPaperSize *paper_size,
double *top,
double *bottom,
double *left,
double *right)
{
return FALSE;
}
static GList *
fallback_printer_list_papers (GtkPrinter *printer)
{
return NULL;
}
static GtkPageSetup *
fallback_printer_get_default_page_size (GtkPrinter *printer)
{
return NULL;
}
static GtkPrintCapabilities
fallback_printer_get_capabilities (GtkPrinter *printer)
{
return 0;
}
void
gtk_print_backend_add_printer (GtkPrintBackend *backend,
GtkPrinter *printer)
{
g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
g_list_store_append (backend->priv->printers, printer);
}
void
gtk_print_backend_remove_printer (GtkPrintBackend *backend,
GtkPrinter *printer)
{
guint position;
g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
if (g_list_store_find (backend->priv->printers, printer, &position))
g_list_store_remove (backend->priv->printers, position);
}
void
gtk_print_backend_set_list_done (GtkPrintBackend *backend)
{
if (!backend->priv->printer_list_done)
{
backend->priv->printer_list_done = TRUE;
g_signal_emit (backend, signals[PRINTER_LIST_DONE], 0);
}
}
/**
* gtk_print_backend_get_printer_list:
*
* Returns the current list of printers.
*
* Returns: (element-type GtkPrinter) (transfer container):
* A list of `GtkPrinter` objects
*/
GList *
gtk_print_backend_get_printer_list (GtkPrintBackend *backend)
{
GList *result = NULL;
guint i;
g_return_val_if_fail (GTK_IS_PRINT_BACKEND (backend), NULL);
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (backend->priv->printers)); i++)
{
GtkPrinter *printer = g_list_model_get_item (G_LIST_MODEL (backend->priv->printers), i);
result = g_list_prepend (result, printer);
g_object_unref (printer);
}
if (!backend->priv->printer_list_requested)
{
if (GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list)
GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list (backend);
backend->priv->printer_list_requested = TRUE;
}
return result;
}
GListModel *
gtk_print_backend_get_printers (GtkPrintBackend *backend)
{
if (!backend->priv->printer_list_requested)
{
if (GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list)
GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list (backend);
backend->priv->printer_list_requested = TRUE;
}
return G_LIST_MODEL (backend->priv->printers);
}
gboolean
gtk_print_backend_printer_list_is_done (GtkPrintBackend *backend)
{
g_return_val_if_fail (GTK_IS_PRINT_BACKEND (backend), TRUE);
return backend->priv->printer_list_done;
}
GtkPrinter *
gtk_print_backend_find_printer (GtkPrintBackend *backend,
const char *printer_name)
{
GtkPrinter *result = NULL;
guint i;
g_return_val_if_fail (GTK_IS_PRINT_BACKEND (backend), NULL);
for (i = 0; !result && i < g_list_model_get_n_items (G_LIST_MODEL (backend->priv->printers)); i++)
{
GtkPrinter *printer = g_list_model_get_item (G_LIST_MODEL (backend->priv->printers), i);
if (strcmp (gtk_printer_get_name (printer), printer_name) == 0)
result = printer;
g_object_unref (printer);
}
return result;
}
void
gtk_print_backend_print_stream (GtkPrintBackend *backend,
GtkPrintJob *job,
GIOChannel *data_io,
GtkPrintJobCompleteFunc callback,
gpointer user_data,
GDestroyNotify dnotify)
{
g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
GTK_PRINT_BACKEND_GET_CLASS (backend)->print_stream (backend,
job,
data_io,
callback,
user_data,
dnotify);
}
void
gtk_print_backend_set_password (GtkPrintBackend *backend,
char **auth_info_required,
char **auth_info,
gboolean store_auth_info)
{
g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
if (GTK_PRINT_BACKEND_GET_CLASS (backend)->set_password)
GTK_PRINT_BACKEND_GET_CLASS (backend)->set_password (backend,
auth_info_required,
auth_info,
store_auth_info);
}
static void
store_auth_info_toggled (GtkCheckButton *chkbtn,
gpointer user_data)
{
gboolean *data = (gboolean *) user_data;
*data = gtk_check_button_get_active (GTK_CHECK_BUTTON (chkbtn));
}
static void
store_entry (GtkEntry *entry,
gpointer user_data)
{
char **data = (char **) user_data;
if (*data != NULL)
{
memset (*data, 0, strlen (*data));
g_free (*data);
}
*data = g_strdup (gtk_editable_get_text (GTK_EDITABLE (entry)));
}
static void
password_dialog_response (GtkWidget *dialog,
int response_id,
GtkPrintBackend *backend)
{
GtkPrintBackendPrivate *priv = backend->priv;
int i, auth_info_len;
if (response_id == GTK_RESPONSE_OK)
gtk_print_backend_set_password (backend, priv->auth_info_required, priv->auth_info, priv->store_auth_info);
else
gtk_print_backend_set_password (backend, priv->auth_info_required, NULL, FALSE);
/* We want to clear the data before freeing it */
auth_info_len = g_strv_length (priv->auth_info_required);
for (i = 0; i < auth_info_len; i++)
{
if (priv->auth_info[i] != NULL)
{
memset (priv->auth_info[i], 0, strlen (priv->auth_info[i]));
g_free (priv->auth_info[i]);
priv->auth_info[i] = NULL;
}
}
g_clear_pointer (&priv->auth_info, g_free);
g_clear_pointer (&priv->auth_info_required, g_strfreev);
gtk_window_destroy (GTK_WINDOW (dialog));
g_object_unref (backend);
}
static void
request_password (GtkPrintBackend *backend,
gpointer auth_info_required,
gpointer auth_info_default,
gpointer auth_info_display,
gpointer auth_info_visible,
const char *prompt,
gboolean can_store_auth_info)
{
GtkPrintBackendPrivate *priv = backend->priv;
GtkWidget *dialog, *box, *main_box, *label, *icon, *vbox, *entry, *chkbtn;
GtkWidget *focus = NULL;
GtkWidget *content_area;
char *markup;
int length;
int i;
char **ai_required = (char **) auth_info_required;
char **ai_default = (char **) auth_info_default;
char **ai_display = (char **) auth_info_display;
gboolean *ai_visible = (gboolean *) auth_info_visible;
priv->auth_info_required = g_strdupv (ai_required);
length = g_strv_length (ai_required);
priv->auth_info = g_new0 (char *, length + 1);
priv->store_auth_info = FALSE;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
dialog = gtk_dialog_new_with_buttons ( _("Authentication"), NULL, GTK_DIALOG_MODAL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
G_GNUC_END_IGNORE_DEPRECATIONS
main_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
/* Left */
icon = gtk_image_new_from_icon_name ("dialog-password-symbolic");
gtk_image_set_icon_size (GTK_IMAGE (icon), GTK_ICON_SIZE_LARGE);
gtk_widget_set_halign (icon, GTK_ALIGN_CENTER);
gtk_widget_set_valign (icon, GTK_ALIGN_START);
gtk_widget_set_margin_start (icon, 12);
gtk_widget_set_margin_end (icon, 12);
gtk_widget_set_margin_top (icon, 12);
gtk_widget_set_margin_bottom (icon, 12);
/* Right */
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_size_request (GTK_WIDGET (vbox), 320, -1);
/* Right - 1. */
label = gtk_label_new (NULL);
markup = g_markup_printf_escaped ("<span weight=\"bold\" size=\"large\">%s</span>", prompt);
gtk_label_set_markup (GTK_LABEL (label), markup);
gtk_label_set_wrap (GTK_LABEL (label), TRUE);
gtk_widget_set_size_request (GTK_WIDGET (label), 320, -1);
g_free (markup);
/* Packing */
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
G_GNUC_END_IGNORE_DEPRECATIONS
gtk_box_append (GTK_BOX (content_area), main_box);
gtk_box_append (GTK_BOX (main_box), icon);
gtk_box_append (GTK_BOX (main_box), vbox);
gtk_box_append (GTK_BOX (vbox), label);
/* Right - 2. */
for (i = 0; i < length; i++)
{
priv->auth_info[i] = g_strdup (ai_default[i]);
if (ai_display[i] != NULL)
{
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_widget_set_margin_top (box, 6);
gtk_widget_set_margin_bottom (box, 6);
label = gtk_label_new (ai_display[i]);
gtk_widget_set_halign (label, GTK_ALIGN_START);
gtk_widget_set_valign (label, GTK_ALIGN_CENTER);
entry = gtk_entry_new ();
focus = entry;
if (ai_default[i] != NULL)
gtk_editable_set_text (GTK_EDITABLE (entry), ai_default[i]);
gtk_entry_set_visibility (GTK_ENTRY (entry), ai_visible[i]);
gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
gtk_box_append (GTK_BOX (vbox), box);
gtk_box_append (GTK_BOX (box), label);
gtk_box_append (GTK_BOX (box), entry);
g_signal_connect (entry, "changed",
G_CALLBACK (store_entry), &(priv->auth_info[i]));
}
}
if (can_store_auth_info)
{
chkbtn = gtk_check_button_new_with_mnemonic (_("_Remember password"));
gtk_widget_set_margin_top (chkbtn, 6);
gtk_widget_set_margin_bottom (chkbtn, 6);
gtk_check_button_set_active (GTK_CHECK_BUTTON (chkbtn), FALSE);
gtk_box_append (GTK_BOX (vbox), chkbtn);
g_signal_connect (chkbtn, "toggled",
G_CALLBACK (store_auth_info_toggled),
&(priv->store_auth_info));
}
if (focus != NULL)
{
gtk_widget_grab_focus (focus);
focus = NULL;
}
g_object_ref (backend);
g_signal_connect (G_OBJECT (dialog), "response",
G_CALLBACK (password_dialog_response), backend);
gtk_window_present (GTK_WINDOW (dialog));
}
void
gtk_print_backend_destroy (GtkPrintBackend *backend)
{
/* The lifecycle of print backends and printers are tied, such that
* the backend owns the printers, but the printers also ref the backend.
* This is so that if the app has a reference to a printer its backend
* will be around. However, this results in a cycle, which we break
* with this call, which causes the print backend to release its printers.
*/
g_object_run_dispose (G_OBJECT (backend));
}
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