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gtk2/gtk/gtkprintoperation-unix.c
Matthias Clasen ef6f4ca81f Initialize the do_preview field of PrintResponseData. (#396703, Christian 
2007-03-10  Matthias Clasen <mclasen@redhat.com>

        * gtk/gtkprintoperation-unix.c: Initialize the do_preview
        field of PrintResponseData.  (#396703, Christian Persch)



svn path=/trunk/; revision=17453
2007-03-10 06:55:44 +00:00

1054 lines
27 KiB
C
Raw Blame History

/* GTK - The GIMP Toolkit
* gtkprintoperation-unix.c: Print Operation Details for Unix
* and Unix-like platforms
* Copyright (C) 2006, 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include "gtkprintoperation-private.h"
#include "gtkmarshal.h"
#include "gtkmessagedialog.h"
#include <cairo-pdf.h>
#include <cairo-ps.h>
#include "gtkprivate.h"
#include "gtkprintunixdialog.h"
#include "gtkpagesetupunixdialog.h"
#include "gtkprintbackend.h"
#include "gtkprinter.h"
#include "gtkprinter-private.h"
#include "gtkprintjob.h"
#include "gtklabel.h"
#include "gtkintl.h"
#include "gtkalias.h"
typedef struct
{
GtkWindow *parent; /* just in case we need to throw error dialogs */
GMainLoop *loop;
gboolean data_sent;
/* Real printing (not preview) */
GtkPrintJob *job; /* the job we are sending to the printer */
cairo_surface_t *surface;
gulong job_status_changed_tag;
} GtkPrintOperationUnix;
typedef struct _PrinterFinder PrinterFinder;
static void printer_finder_free (PrinterFinder *finder);
static void find_printer (const gchar *printer,
GFunc func,
gpointer data);
static void
unix_start_page (GtkPrintOperation *op,
GtkPrintContext *print_context,
GtkPageSetup *page_setup)
{
GtkPrintOperationUnix *op_unix;
GtkPaperSize *paper_size;
cairo_surface_type_t type;
gdouble w, h;
op_unix = op->priv->platform_data;
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_unix->surface);
if (type == CAIRO_SURFACE_TYPE_PS)
cairo_ps_surface_set_size (op_unix->surface, w, h);
else if (type == CAIRO_SURFACE_TYPE_PDF)
cairo_pdf_surface_set_size (op_unix->surface, w, h);
}
static void
unix_end_page (GtkPrintOperation *op,
GtkPrintContext *print_context)
{
cairo_t *cr;
cr = gtk_print_context_get_cairo_context (print_context);
cairo_show_page (cr);
}
static void
op_unix_free (GtkPrintOperationUnix *op_unix)
{
if (op_unix->job)
{
g_signal_handler_disconnect (op_unix->job,
op_unix->job_status_changed_tag);
g_object_unref (op_unix->job);
}
g_free (op_unix);
}
static gchar *
shell_command_substitute_file (const gchar *cmd,
const gchar *filename)
{
const gchar *inptr, *start;
gchar *result;
GString *final;
g_return_val_if_fail (cmd != NULL, NULL);
g_return_val_if_fail (filename != NULL, NULL);
result = NULL;
final = g_string_new (NULL);
start = inptr = cmd;
while ((inptr = strchr (inptr, '%')) != NULL)
{
g_string_append_len (final, start, inptr - start);
inptr++;
switch (*inptr)
{
case 'f':
g_string_append (final, filename ? filename : "");
break;
case '%':
g_string_append_c (final, '%');
break;
default:
g_string_append_c (final, '%');
if (*inptr)
g_string_append_c (final, *inptr);
break;
}
if (*inptr)
inptr++;
start = inptr;
}
g_string_append (final, start);
result = final->str;
g_string_free (final, FALSE);
return result;
}
void
_gtk_print_operation_platform_backend_launch_preview (GtkPrintOperation *op,
cairo_surface_t *surface,
GtkWindow *parent,
const gchar *filename)
{
gint argc;
gchar **argv;
gchar *cmd;
gchar *preview_cmd;
GtkSettings *settings;
gchar *quoted_filename;
GdkScreen *screen;
GError *error = NULL;
cairo_surface_destroy (surface);
settings = gtk_settings_get_default ();
g_object_get (settings, "gtk-print-preview-command", &preview_cmd, NULL);
quoted_filename = g_shell_quote (filename);
cmd = shell_command_substitute_file (preview_cmd, quoted_filename);
g_shell_parse_argv (cmd, &argc, &argv, &error);
if (error != NULL)
goto out;
if (parent)
screen = gtk_window_get_screen (parent);
else
screen = gdk_screen_get_default ();
gdk_spawn_on_screen (screen, NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, &error);
out:
if (error != NULL)
{
GtkWidget *edialog;
edialog = gtk_message_dialog_new (parent,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
_("Error launching preview") /* FIXME better text */);
gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
"%s", error->message);
gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
g_signal_connect (edialog, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
gtk_window_present (GTK_WINDOW (edialog));
g_error_free (error);
}
g_free (cmd);
g_free (quoted_filename);
g_free (preview_cmd);
g_strfreev (argv);
}
static void
unix_finish_send (GtkPrintJob *job,
gpointer user_data,
GError *error)
{
GtkPrintOperationUnix *op_unix;
op_unix = (GtkPrintOperationUnix *) user_data;
if (error != NULL)
{
GtkWidget *edialog;
edialog = gtk_message_dialog_new (op_unix->parent,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
_("Error printing") /* FIXME better text */);
gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
"%s", error->message);
gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
g_signal_connect (edialog, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
gtk_window_present (GTK_WINDOW (edialog));
}
op_unix->data_sent = TRUE;
if (op_unix->loop)
g_main_loop_quit (op_unix->loop);
}
static void
unix_end_run (GtkPrintOperation *op,
gboolean wait,
gboolean cancelled)
{
GtkPrintOperationUnix *op_unix = op->priv->platform_data;
cairo_surface_finish (op_unix->surface);
if (cancelled)
return;
if (wait)
op_unix->loop = g_main_loop_new (NULL, FALSE);
/* TODO: Check for error */
if (op_unix->job != NULL)
gtk_print_job_send (op_unix->job,
unix_finish_send,
op_unix, NULL);
if (wait)
{
g_object_ref (op);
if (!op_unix->data_sent)
{
GDK_THREADS_LEAVE ();
g_main_loop_run (op_unix->loop);
GDK_THREADS_ENTER ();
}
g_main_loop_unref (op_unix->loop);
op_unix->loop = NULL;
g_object_unref (op);
}
}
static void
job_status_changed_cb (GtkPrintJob *job,
GtkPrintOperation *op)
{
_gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
}
static GtkWidget *
get_print_dialog (GtkPrintOperation *op,
GtkWindow *parent)
{
GtkPrintOperationPrivate *priv = op->priv;
GtkWidget *pd, *label;
GtkPageSetup *page_setup;
const gchar *custom_tab_label;
pd = gtk_print_unix_dialog_new (NULL, parent);
gtk_print_unix_dialog_set_manual_capabilities (GTK_PRINT_UNIX_DIALOG (pd),
GTK_PRINT_CAPABILITY_PAGE_SET |
GTK_PRINT_CAPABILITY_COPIES |
GTK_PRINT_CAPABILITY_COLLATE |
GTK_PRINT_CAPABILITY_REVERSE |
GTK_PRINT_CAPABILITY_SCALE |
GTK_PRINT_CAPABILITY_PREVIEW);
if (priv->print_settings)
gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
priv->print_settings);
if (priv->default_page_setup)
page_setup = gtk_page_setup_copy (priv->default_page_setup);
else
page_setup = gtk_page_setup_new ();
gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
page_setup);
g_object_unref (page_setup);
g_signal_emit_by_name (op, "create-custom-widget",
&priv->custom_widget);
if (priv->custom_widget)
{
custom_tab_label = priv->custom_tab_label;
if (custom_tab_label == NULL)
{
custom_tab_label = g_get_application_name ();
if (custom_tab_label == NULL)
custom_tab_label = _("Application");
}
label = gtk_label_new (custom_tab_label);
gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
priv->custom_widget, label);
}
return pd;
}
typedef struct
{
GtkPrintOperation *op;
gboolean do_print;
gboolean do_preview;
GtkPrintOperationResult result;
GtkPrintOperationPrintFunc print_cb;
GDestroyNotify destroy;
GtkWindow *parent;
GMainLoop *loop;
} PrintResponseData;
static void
print_response_data_free (gpointer data)
{
PrintResponseData *rdata = data;
g_object_unref (rdata->op);
g_free (rdata);
}
static void
finish_print (PrintResponseData *rdata,
GtkPrinter *printer,
GtkPageSetup *page_setup,
GtkPrintSettings *settings)
{
GtkPrintOperation *op = rdata->op;
GtkPrintOperationPrivate *priv = op->priv;
GtkPrintJob *job;
if (rdata->do_print)
{
gtk_print_operation_set_print_settings (op, settings);
priv->print_context = _gtk_print_context_new (op);
_gtk_print_context_set_page_setup (priv->print_context, page_setup);
if (!rdata->do_preview)
{
GtkPrintOperationUnix *op_unix;
cairo_t *cr;
op_unix = g_new0 (GtkPrintOperationUnix, 1);
priv->platform_data = op_unix;
priv->free_platform_data = (GDestroyNotify) op_unix_free;
op_unix->parent = rdata->parent;
priv->start_page = unix_start_page;
priv->end_page = unix_end_page;
priv->end_run = unix_end_run;
job = gtk_print_job_new (priv->job_name, printer, settings, page_setup);
op_unix->job = job;
gtk_print_job_set_track_print_status (job, priv->track_print_status);
op_unix->surface = gtk_print_job_get_surface (job, &priv->error);
if (op_unix->surface == NULL)
{
rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
rdata->do_print = FALSE;
goto out;
}
cr = cairo_create (op_unix->surface);
gtk_print_context_set_cairo_context (priv->print_context, cr, 72, 72);
cairo_destroy (cr);
_gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
op_unix->job_status_changed_tag =
g_signal_connect (job, "status-changed",
G_CALLBACK (job_status_changed_cb), op);
priv->print_pages = job->print_pages;
priv->page_ranges = job->page_ranges;
priv->num_page_ranges = job->num_page_ranges;
priv->manual_num_copies = job->num_copies;
priv->manual_collation = job->collate;
priv->manual_reverse = job->reverse;
priv->manual_page_set = job->page_set;
priv->manual_scale = job->scale;
priv->manual_orientation = job->rotate_to_orientation;
}
}
out:
if (rdata->print_cb)
rdata->print_cb (op, rdata->parent, rdata->do_print, rdata->result);
if (rdata->destroy)
rdata->destroy (rdata);
}
static void
handle_print_response (GtkWidget *dialog,
gint response,
gpointer data)
{
GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
PrintResponseData *rdata = data;
GtkPrintSettings *settings = NULL;
GtkPageSetup *page_setup = NULL;
GtkPrinter *printer = NULL;
if (response == GTK_RESPONSE_OK)
{
printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
rdata->do_preview = FALSE;
if (printer != NULL)
rdata->do_print = TRUE;
}
else if (response == GTK_RESPONSE_APPLY)
{
/* print preview */
rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
rdata->do_preview = TRUE;
rdata->do_print = TRUE;
rdata->op->priv->action = GTK_PRINT_OPERATION_ACTION_PREVIEW;
}
if (rdata->do_print)
{
settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
}
finish_print (rdata, printer, page_setup, settings);
if (settings)
g_object_unref (settings);
gtk_widget_destroy (GTK_WIDGET (pd));
}
static void
found_printer (GtkPrinter *printer,
PrintResponseData *rdata)
{
GtkPrintOperation *op = rdata->op;
GtkPrintOperationPrivate *priv = op->priv;
GtkPrintSettings *settings = NULL;
GtkPageSetup *page_setup = NULL;
if (rdata->loop)
g_main_loop_quit (rdata->loop);
if (printer != NULL)
{
rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
rdata->do_print = TRUE;
if (priv->print_settings)
settings = gtk_print_settings_copy (priv->print_settings);
else
settings = gtk_print_settings_new ();
gtk_print_settings_set_printer (settings,
gtk_printer_get_name (printer));
if (priv->default_page_setup)
page_setup = gtk_page_setup_copy (priv->default_page_setup);
else
page_setup = gtk_page_setup_new ();
}
finish_print (rdata, printer, page_setup, settings);
if (settings)
g_object_unref (settings);
if (page_setup)
g_object_unref (page_setup);
}
void
_gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation *op,
gboolean show_dialog,
GtkWindow *parent,
GtkPrintOperationPrintFunc print_cb)
{
GtkWidget *pd;
PrintResponseData *rdata;
const gchar *printer_name;
rdata = g_new (PrintResponseData, 1);
rdata->op = g_object_ref (op);
rdata->do_print = FALSE;
rdata->do_preview = FALSE;
rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
rdata->print_cb = print_cb;
rdata->parent = parent;
rdata->loop = NULL;
rdata->destroy = print_response_data_free;
if (show_dialog)
{
pd = get_print_dialog (op, parent);
gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
g_signal_connect (pd, "response",
G_CALLBACK (handle_print_response), rdata);
gtk_window_present (GTK_WINDOW (pd));
}
else
{
printer_name = NULL;
if (op->priv->print_settings)
printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
find_printer (printer_name, (GFunc) found_printer, rdata);
}
}
static cairo_status_t
write_preview (void *closure,
const unsigned char *data,
unsigned int length)
{
gint fd = GPOINTER_TO_INT (closure);
gssize written;
while (length > 0)
{
written = write (fd, data, length);
if (written == -1)
{
if (errno == EAGAIN || errno == EINTR)
continue;
return CAIRO_STATUS_WRITE_ERROR;
}
data += written;
length -= written;
}
return CAIRO_STATUS_SUCCESS;
}
static void
close_preview (void *data)
{
gint fd = GPOINTER_TO_INT (data);
close (fd);
}
cairo_surface_t *
_gtk_print_operation_platform_backend_create_preview_surface (GtkPrintOperation *op,
GtkPageSetup *page_setup,
gdouble *dpi_x,
gdouble *dpi_y,
gchar **target)
{
gchar *filename;
gint fd;
GtkPaperSize *paper_size;
gdouble w, h;
cairo_surface_t *surface;
static cairo_user_data_key_t key;
filename = g_build_filename (g_get_tmp_dir (), "previewXXXXXX.pdf", NULL);
fd = g_mkstemp (filename);
*target = filename;
g_print ("target is %s\n", filename);
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);
*dpi_x = *dpi_y = 72;
surface = cairo_pdf_surface_create_for_stream (write_preview, GINT_TO_POINTER(fd), w, h);
cairo_surface_set_user_data (surface, &key, GINT_TO_POINTER (fd), close_preview);
return surface;
}
void
_gtk_print_operation_platform_backend_preview_start_page (GtkPrintOperation *op,
cairo_surface_t *surface,
cairo_t *cr)
{
}
void
_gtk_print_operation_platform_backend_preview_end_page (GtkPrintOperation *op,
cairo_surface_t *surface,
cairo_t *cr)
{
cairo_show_page (cr);
}
void
_gtk_print_operation_platform_backend_resize_preview_surface (GtkPrintOperation *op,
GtkPageSetup *page_setup,
cairo_surface_t *surface)
{
GtkPaperSize *paper_size;
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);
cairo_pdf_surface_set_size (surface, w, h);
}
GtkPrintOperationResult
_gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
gboolean show_dialog,
GtkWindow *parent,
gboolean *do_print)
{
GtkWidget *pd;
PrintResponseData rdata;
gint response;
const gchar *printer_name;
rdata.op = op;
rdata.do_print = FALSE;
rdata.do_preview = FALSE;
rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
rdata.print_cb = NULL;
rdata.destroy = NULL;
rdata.parent = parent;
rdata.loop = NULL;
if (show_dialog)
{
pd = get_print_dialog (op, parent);
response = gtk_dialog_run (GTK_DIALOG (pd));
handle_print_response (pd, response, &rdata);
}
else
{
printer_name = NULL;
if (op->priv->print_settings)
printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
rdata.loop = g_main_loop_new (NULL, FALSE);
find_printer (printer_name,
(GFunc) found_printer, &rdata);
GDK_THREADS_LEAVE ();
g_main_loop_run (rdata.loop);
GDK_THREADS_ENTER ();
g_main_loop_unref (rdata.loop);
rdata.loop = NULL;
}
*do_print = rdata.do_print;
return rdata.result;
}
typedef struct
{
GtkPageSetup *page_setup;
GtkPageSetupDoneFunc done_cb;
gpointer data;
GDestroyNotify destroy;
} PageSetupResponseData;
static void
page_setup_data_free (gpointer data)
{
PageSetupResponseData *rdata = data;
if (rdata->page_setup)
g_object_unref (rdata->page_setup);
g_free (rdata);
}
static void
handle_page_setup_response (GtkWidget *dialog,
gint response,
gpointer data)
{
GtkPageSetupUnixDialog *psd;
PageSetupResponseData *rdata = data;
psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
if (response == GTK_RESPONSE_OK)
rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
gtk_widget_destroy (dialog);
if (rdata->done_cb)
rdata->done_cb (rdata->page_setup, rdata->data);
if (rdata->destroy)
rdata->destroy (rdata);
}
static GtkWidget *
get_page_setup_dialog (GtkWindow *parent,
GtkPageSetup *page_setup,
GtkPrintSettings *settings)
{
GtkWidget *dialog;
dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
if (page_setup)
gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
page_setup);
gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
settings);
return dialog;
}
/**
* gtk_print_run_page_setup_dialog:
* @parent: transient parent, or %NULL
* @page_setup: an existing #GtkPageSetup, or %NULL
* @settings: a #GtkPrintSettings
*
* Runs a page setup dialog, letting the user modify the values from
* @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
* is identical to the passed in @page_setup, otherwise it contains the
* modifications done in the dialog.
*
* Note that this function may use a recursive mainloop to show the page
* setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
* a problem.
*
* Return value: a new #GtkPageSetup
*
* Since: 2.10
*/
GtkPageSetup *
gtk_print_run_page_setup_dialog (GtkWindow *parent,
GtkPageSetup *page_setup,
GtkPrintSettings *settings)
{
GtkWidget *dialog;
gint response;
PageSetupResponseData rdata;
rdata.page_setup = NULL;
rdata.done_cb = NULL;
rdata.data = NULL;
rdata.destroy = NULL;
dialog = get_page_setup_dialog (parent, page_setup, settings);
response = gtk_dialog_run (GTK_DIALOG (dialog));
handle_page_setup_response (dialog, response, &rdata);
if (rdata.page_setup)
return rdata.page_setup;
else if (page_setup)
return gtk_page_setup_copy (page_setup);
else
return gtk_page_setup_new ();
}
/**
* gtk_print_run_page_setup_dialog_async:
* @parent: transient parent, or %NULL
* @page_setup: an existing #GtkPageSetup, or %NULL
* @settings: a #GtkPrintSettings
* @done_cb: a function to call when the user saves the modified page setup
* @data: user data to pass to @done_cb
*
* Runs a page setup dialog, letting the user modify the values from @page_setup.
*
* In contrast to gtk_print_run_page_setup_dialog(), this function returns after
* showing the page setup dialog on platforms that support this, and calls @done_cb
* from a signal handler for the ::response signal of the dialog.
*
* Since: 2.10
*/
void
gtk_print_run_page_setup_dialog_async (GtkWindow *parent,
GtkPageSetup *page_setup,
GtkPrintSettings *settings,
GtkPageSetupDoneFunc done_cb,
gpointer data)
{
GtkWidget *dialog;
PageSetupResponseData *rdata;
dialog = get_page_setup_dialog (parent, page_setup, settings);
gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
rdata = g_new (PageSetupResponseData, 1);
rdata->page_setup = NULL;
rdata->done_cb = done_cb;
rdata->data = data;
rdata->destroy = page_setup_data_free;
g_signal_connect (dialog, "response",
G_CALLBACK (handle_page_setup_response), rdata);
gtk_window_present (GTK_WINDOW (dialog));
}
struct _PrinterFinder
{
gboolean found_printer;
GFunc func;
gpointer data;
gchar *printer_name;
GList *backends;
guint timeout_tag;
GtkPrinter *printer;
GtkPrinter *default_printer;
GtkPrinter *first_printer;
};
static gboolean
find_printer_idle (gpointer data)
{
PrinterFinder *finder = data;
GtkPrinter *printer;
if (finder->printer != NULL)
printer = finder->printer;
else if (finder->default_printer != NULL)
printer = finder->default_printer;
else if (finder->first_printer != NULL)
printer = finder->first_printer;
else
printer = NULL;
finder->func (printer, finder->data);
printer_finder_free (finder);
return FALSE;
}
static void
printer_added_cb (GtkPrintBackend *backend,
GtkPrinter *printer,
PrinterFinder *finder)
{
if (finder->found_printer)
return;
/* FIXME this skips "Print to PDF" - is this intentional ? */
if (gtk_printer_is_virtual (printer))
return;
if (finder->printer_name != NULL &&
strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
{
finder->printer = g_object_ref (printer);
finder->found_printer = TRUE;
}
else if (finder->default_printer == NULL &&
gtk_printer_is_default (printer))
{
finder->default_printer = g_object_ref (printer);
if (finder->printer_name == NULL)
finder->found_printer = TRUE;
}
else
if (finder->first_printer == NULL)
finder->first_printer = g_object_ref (printer);
if (finder->found_printer)
g_idle_add (find_printer_idle, finder);
}
static void
printer_list_done_cb (GtkPrintBackend *backend,
PrinterFinder *finder)
{
finder->backends = g_list_remove (finder->backends, backend);
g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
gtk_print_backend_destroy (backend);
g_object_unref (backend);
if (finder->backends == NULL && !finder->found_printer)
g_idle_add (find_printer_idle, finder);
}
static void
find_printer_init (PrinterFinder *finder,
GtkPrintBackend *backend)
{
GList *list;
GList *node;
list = gtk_print_backend_get_printer_list (backend);
node = list;
while (node != NULL)
{
printer_added_cb (backend, node->data, finder);
node = node->next;
if (finder->found_printer)
break;
}
g_list_free (list);
if (gtk_print_backend_printer_list_is_done (backend))
{
finder->backends = g_list_remove (finder->backends, backend);
gtk_print_backend_destroy (backend);
g_object_unref (backend);
}
else
{
g_signal_connect (backend, "printer-added",
(GCallback) printer_added_cb,
finder);
g_signal_connect (backend, "printer-list-done",
(GCallback) printer_list_done_cb,
finder);
}
}
static void
printer_finder_free (PrinterFinder *finder)
{
GList *l;
g_free (finder->printer_name);
if (finder->printer)
g_object_unref (finder->printer);
if (finder->default_printer)
g_object_unref (finder->default_printer);
if (finder->first_printer)
g_object_unref (finder->first_printer);
for (l = finder->backends; l != NULL; l = l->next)
{
GtkPrintBackend *backend = l->data;
g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
gtk_print_backend_destroy (backend);
g_object_unref (backend);
}
g_list_free (finder->backends);
g_free (finder);
}
static void
find_printer (const gchar *printer,
GFunc func,
gpointer data)
{
GList *node, *next;
PrinterFinder *finder;
finder = g_new0 (PrinterFinder, 1);
finder->printer_name = g_strdup (printer);
finder->func = func;
finder->data = data;
finder->backends = NULL;
if (g_module_supported ())
finder->backends = gtk_print_backend_load_modules ();
for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
{
next = node->next;
find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
}
if (finder->backends == NULL && !finder->found_printer)
g_idle_add (find_printer_idle, finder);
}
#define __GTK_PRINT_OPERATION_UNIX_C__
#include "gtkaliasdef.c"
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