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gtk/modules/printbackends/file/gtkprintbackendfile.c
Christian Persch d14e9a14ad configure.in gtk/Makefile.am Rename "pdf" backend to "file" backend. Step 
2006-06-20  Christian Persch  <chpe@cvs.gnome.org>

	* configure.in
	* gtk/Makefile.am
	* modules/printbackends/Makefile.am
	A modules/printbackends/file/.cvsignore
	A modules/printbackends/file/Makefile.am
	A modules/printbackends/file/gtkprintbackendfile.c
	A modules/printbackends/file/gtkprintbackendfile.h
	R modules/printbackends/pdf/*:
	Rename "pdf" backend to "file" backend. Step 2 from bug #339592.
2006-06-20 18:42:46 +00:00

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/* GTK - The GIMP Toolkit
* gtkprintbackendpdf.c: Default implementation of GtkPrintBackend
* for printing to a file
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <cairo.h>
#include <cairo-pdf.h>
#include <glib/gi18n-lib.h>
#include "gtkprintoperation.h"
#include "gtkprintbackend.h"
#include "gtkprintbackendfile.h"
#include "gtkprinter.h"
#include "gtkprinter-private.h"
typedef struct _GtkPrintBackendFileClass GtkPrintBackendFileClass;
#define GTK_PRINT_BACKEND_FILE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_FILE, GtkPrintBackendFileClass))
#define GTK_IS_PRINT_BACKEND_FILE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_FILE))
#define GTK_PRINT_BACKEND_FILE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_FILE, GtkPrintBackendFileClass))
#define _STREAM_MAX_CHUNK_SIZE 8192
static GType print_backend_file_type = 0;
struct _GtkPrintBackendFileClass
{
GtkPrintBackendClass parent_class;
};
struct _GtkPrintBackendFile
{
GtkPrintBackend parent_instance;
};
static GObjectClass *backend_parent_class;
static void gtk_print_backend_file_class_init (GtkPrintBackendFileClass *class);
static void gtk_print_backend_file_init (GtkPrintBackendFile *impl);
static void file_printer_get_settings_from_options (GtkPrinter *printer,
GtkPrinterOptionSet *options,
GtkPrintSettings *settings);
static GtkPrinterOptionSet *file_printer_get_options (GtkPrinter *printer,
GtkPrintSettings *settings,
GtkPageSetup *page_setup,
GtkPrintCapabilities capabilities);
static void file_printer_prepare_for_print (GtkPrinter *printer,
GtkPrintJob *print_job,
GtkPrintSettings *settings,
GtkPageSetup *page_setup);
static void gtk_print_backend_file_print_stream (GtkPrintBackend *print_backend,
GtkPrintJob *job,
gint data_fd,
GtkPrintJobCompleteFunc callback,
gpointer user_data,
GDestroyNotify dnotify);
static cairo_surface_t * file_printer_create_cairo_surface (GtkPrinter *printer,
GtkPrintSettings *settings,
gdouble width,
gdouble height,
gint cache_fd);
static void
gtk_print_backend_file_register_type (GTypeModule *module)
{
static const GTypeInfo print_backend_file_info =
{
sizeof (GtkPrintBackendFileClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_print_backend_file_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkPrintBackendFile),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_print_backend_file_init,
};
print_backend_file_type = g_type_module_register_type (module,
GTK_TYPE_PRINT_BACKEND,
"GtkPrintBackendFile",
&print_backend_file_info, 0);
}
G_MODULE_EXPORT void
pb_module_init (GTypeModule *module)
{
gtk_print_backend_file_register_type (module);
}
G_MODULE_EXPORT void
pb_module_exit (void)
{
}
G_MODULE_EXPORT GtkPrintBackend *
pb_module_create (void)
{
return gtk_print_backend_file_new ();
}
/*
* GtkPrintBackendFile
*/
GType
gtk_print_backend_file_get_type (void)
{
return print_backend_file_type;
}
/**
* gtk_print_backend_file_new:
*
* Creates a new #GtkPrintBackendFile object. #GtkPrintBackendFile
* implements the #GtkPrintBackend interface with direct access to
* the filesystem using Unix/Linux API calls
*
* Return value: the new #GtkPrintBackendFile object
**/
GtkPrintBackend *
gtk_print_backend_file_new (void)
{
return g_object_new (GTK_TYPE_PRINT_BACKEND_FILE, NULL);
}
static void
gtk_print_backend_file_class_init (GtkPrintBackendFileClass *class)
{
GtkPrintBackendClass *backend_class = GTK_PRINT_BACKEND_CLASS (class);
backend_parent_class = g_type_class_peek_parent (class);
backend_class->print_stream = gtk_print_backend_file_print_stream;
backend_class->printer_create_cairo_surface = file_printer_create_cairo_surface;
backend_class->printer_get_options = file_printer_get_options;
backend_class->printer_get_settings_from_options = file_printer_get_settings_from_options;
backend_class->printer_prepare_for_print = file_printer_prepare_for_print;
}
static cairo_status_t
_cairo_write (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 cairo_surface_t *
file_printer_create_cairo_surface (GtkPrinter *printer,
GtkPrintSettings *settings,
gdouble width,
gdouble height,
gint cache_fd)
{
cairo_surface_t *surface;
surface = cairo_pdf_surface_create_for_stream (_cairo_write, GINT_TO_POINTER (cache_fd), width, height);
/* TODO: DPI from settings object? */
cairo_surface_set_fallback_resolution (surface, 300, 300);
return surface;
}
typedef struct {
GtkPrintBackend *backend;
GtkPrintJobCompleteFunc callback;
GtkPrintJob *job;
gint target_fd;
gpointer user_data;
GDestroyNotify dnotify;
} _PrintStreamData;
static void
file_print_cb (GtkPrintBackendFile *print_backend,
GError *error,
gpointer user_data)
{
_PrintStreamData *ps = (_PrintStreamData *) user_data;
if (ps->target_fd > 0)
close (ps->target_fd);
if (ps->callback)
ps->callback (ps->job, ps->user_data, error);
if (ps->dnotify)
ps->dnotify (ps->user_data);
gtk_print_job_set_status (ps->job,
(error != NULL)?GTK_PRINT_STATUS_FINISHED_ABORTED:GTK_PRINT_STATUS_FINISHED);
if (ps->job)
g_object_unref (ps->job);
g_free (ps);
}
static gboolean
file_write (GIOChannel *source,
GIOCondition con,
gpointer user_data)
{
gchar buf[_STREAM_MAX_CHUNK_SIZE];
gsize bytes_read;
GError *error;
_PrintStreamData *ps = (_PrintStreamData *) user_data;
gint source_fd;
error = NULL;
source_fd = g_io_channel_unix_get_fd (source);
bytes_read = read (source_fd,
buf,
_STREAM_MAX_CHUNK_SIZE);
if (bytes_read > 0)
{
if (write (ps->target_fd, buf, bytes_read) == -1)
{
error = g_error_new (GTK_PRINT_ERROR,
GTK_PRINT_ERROR_INTERNAL_ERROR,
g_strerror (errno));
}
}
else if (bytes_read == -1)
{
error = g_error_new (GTK_PRINT_ERROR,
GTK_PRINT_ERROR_INTERNAL_ERROR,
g_strerror (errno));
}
if (bytes_read == 0 || error != NULL)
{
file_print_cb (GTK_PRINT_BACKEND_FILE (ps->backend), error, user_data);
return FALSE;
}
return TRUE;
}
static void
gtk_print_backend_file_print_stream (GtkPrintBackend *print_backend,
GtkPrintJob *job,
gint data_fd,
GtkPrintJobCompleteFunc callback,
gpointer user_data,
GDestroyNotify dnotify)
{
GError *error;
GtkPrinter *printer;
_PrintStreamData *ps;
GtkPrintSettings *settings;
GIOChannel *save_channel;
const gchar *uri;
gchar *filename = NULL; /* quit gcc */
printer = gtk_print_job_get_printer (job);
settings = gtk_print_job_get_settings (job);
error = NULL;
uri = gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_URI);
if (uri)
filename = g_filename_from_uri (uri, NULL, NULL);
/* FIXME: shouldn't we error out if we get an URI we cannot handle,
* rather than to print to some random file somewhere?
*/
if (filename == NULL)
filename = g_strdup_printf ("output.pdf");
ps = g_new0 (_PrintStreamData, 1);
ps->callback = callback;
ps->user_data = user_data;
ps->dnotify = dnotify;
ps->job = g_object_ref (job);
ps->backend = print_backend;
ps->target_fd = creat (filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
g_free (filename);
if (ps->target_fd == -1)
{
error = g_error_new (GTK_PRINT_ERROR,
GTK_PRINT_ERROR_INTERNAL_ERROR,
g_strerror (errno));
file_print_cb (GTK_PRINT_BACKEND_FILE (print_backend), error, ps);
return;
}
save_channel = g_io_channel_unix_new (data_fd);
g_io_add_watch (save_channel,
G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
(GIOFunc) file_write,
ps);
}
static void
gtk_print_backend_file_init (GtkPrintBackendFile *backend)
{
GtkPrinter *printer;
printer = g_object_new (GTK_TYPE_PRINTER,
"name", _("Print to File"),
"backend", backend,
"is-virtual", TRUE,
"accepts-ps", FALSE,
NULL);
gtk_printer_set_has_details (printer, TRUE);
gtk_printer_set_icon_name (printer, "gtk-floppy");
gtk_printer_set_is_active (printer, TRUE);
gtk_print_backend_add_printer (GTK_PRINT_BACKEND (backend), printer);
g_object_unref (printer);
gtk_print_backend_set_list_done (GTK_PRINT_BACKEND (backend));
}
static GtkPrinterOptionSet *
file_printer_get_options (GtkPrinter *printer,
GtkPrintSettings *settings,
GtkPageSetup *page_setup,
GtkPrintCapabilities capabilities)
{
GtkPrinterOptionSet *set;
GtkPrinterOption *option;
const char *uri;
char *n_up[] = {"1" };
set = gtk_printer_option_set_new ();
option = gtk_printer_option_new ("gtk-n-up", _("Pages Per Sheet"), GTK_PRINTER_OPTION_TYPE_PICKONE);
gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up),
n_up, n_up);
gtk_printer_option_set (option, "1");
gtk_printer_option_set_add (set, option);
g_object_unref (option);
option = gtk_printer_option_new ("gtk-main-page-custom-input", _("File"), GTK_PRINTER_OPTION_TYPE_FILESAVE);
gtk_printer_option_set (option, "output.pdf");
option->group = g_strdup ("GtkPrintDialogExtension");
gtk_printer_option_set_add (set, option);
if (settings != NULL &&
(uri = gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_URI))!= NULL)
gtk_printer_option_set (option, uri);
return set;
}
static void
file_printer_get_settings_from_options (GtkPrinter *printer,
GtkPrinterOptionSet *options,
GtkPrintSettings *settings)
{
GtkPrinterOption *option;
option = gtk_printer_option_set_lookup (options, "gtk-main-page-custom-input");
gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_OUTPUT_URI, option->value);
}
static void
file_printer_prepare_for_print (GtkPrinter *printer,
GtkPrintJob *print_job,
GtkPrintSettings *settings,
GtkPageSetup *page_setup)
{
gdouble scale;
print_job->print_pages = gtk_print_settings_get_print_pages (settings);
print_job->page_ranges = NULL;
print_job->num_page_ranges = 0;
if (print_job->print_pages == GTK_PRINT_PAGES_RANGES)
print_job->page_ranges =
gtk_print_settings_get_page_ranges (settings,
&print_job->num_page_ranges);
print_job->collate = gtk_print_settings_get_collate (settings);
print_job->reverse = gtk_print_settings_get_reverse (settings);
print_job->num_copies = gtk_print_settings_get_n_copies (settings);
scale = gtk_print_settings_get_scale (settings);
if (scale != 100.0)
print_job->scale = scale/100.0;
print_job->page_set = gtk_print_settings_get_page_set (settings);
print_job->rotate_to_orientation = TRUE;
}
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