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/*
* e-composer-autosave.c
*
* This program 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) version 3.
*
* This program 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 the program; if not, see <http://www.gnu.org/licenses/>
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <libebackend/libebackend.h>
#include <composer/e-msg-composer.h>
#include "e-autosave-utils.h"
/* Standard GObject macros */
#define E_TYPE_COMPOSER_AUTOSAVE \
(e_composer_autosave_get_type ())
#define E_COMPOSER_AUTOSAVE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), E_TYPE_COMPOSER_AUTOSAVE, EComposerAutosave))
#define AUTOSAVE_INTERVAL 60 /* seconds */
typedef struct _EComposerAutosave EComposerAutosave;
typedef struct _EComposerAutosaveClass EComposerAutosaveClass;
struct _EComposerAutosave {
EExtension parent;
GCancellable *cancellable;
guint timeout_id;
/* Composer contents have changed since
* the last auto-save or explicit save. */
gboolean changed;
/* Prevent error dialogs from piling up. */
gboolean error_shown;
};
struct _EComposerAutosaveClass {
EExtensionClass parent_class;
};
/* Forward Declarations */
GType e_composer_autosave_get_type (void);
void e_composer_autosave_type_register (GTypeModule *type_module);
G_DEFINE_DYNAMIC_TYPE (
EComposerAutosave,
e_composer_autosave,
E_TYPE_EXTENSION)
static void
composer_autosave_finished_cb (EMsgComposer *composer,
GAsyncResult *result,
EComposerAutosave *autosave)
{
GFile *snapshot_file;
GError *error = NULL;
snapshot_file = e_composer_get_snapshot_file (composer);
e_composer_save_snapshot_finish (composer, result, &error);
/* Return silently if we were cancelled. */
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_error_free (error);
else if (error != NULL) {
gchar *basename;
if (G_IS_FILE (snapshot_file))
basename = g_file_get_basename (snapshot_file);
else
basename = g_strdup (" ");
/* Only show one error dialog at a time. */
if (!autosave->error_shown) {
autosave->error_shown = TRUE;
e_alert_run_dialog_for_args (
GTK_WINDOW (composer),
"mail-composer:no-autosave",
basename, error->message, NULL);
autosave->error_shown = FALSE;
} else
g_warning ("%s: %s", basename, error->message);
g_free (basename);
g_error_free (error);
}
g_object_unref (autosave);
}
static gboolean
composer_autosave_timeout_cb (EComposerAutosave *autosave)
{
EExtensible *extensible;
extensible = e_extension_get_extensible (E_EXTENSION (autosave));
/* User may have reverted or explicitly saved
* the changes since the timeout was scheduled. */
if (autosave->changed) {
/* Cancel the previous snapshot if it's still in
* progress and start a new snapshot operation. */
g_cancellable_cancel (autosave->cancellable);
g_object_unref (autosave->cancellable);
autosave->cancellable = g_cancellable_new ();
e_composer_save_snapshot (
E_MSG_COMPOSER (extensible),
autosave->cancellable,
(GAsyncReadyCallback)
composer_autosave_finished_cb,
g_object_ref (autosave));
}
autosave->timeout_id = 0;
autosave->changed = FALSE;
return FALSE;
}
static void
composer_autosave_changed_cb (EComposerAutosave *autosave)
{
GtkhtmlEditor *editor;
EExtensible *extensible;
extensible = e_extension_get_extensible (E_EXTENSION (autosave));
editor = GTKHTML_EDITOR (extensible);
autosave->changed = gtkhtml_editor_get_changed (editor);
if (autosave->changed && autosave->timeout_id == 0)
autosave->timeout_id = g_timeout_add_seconds (
AUTOSAVE_INTERVAL, (GSourceFunc)
composer_autosave_timeout_cb, autosave);
}
static void
composer_autosave_dispose (GObject *object)
{
EComposerAutosave *autosave;
GObjectClass *parent_class;
autosave = E_COMPOSER_AUTOSAVE (object);
/* Cancel any snapshots in progress. */
if (autosave->cancellable != NULL) {
g_cancellable_cancel (autosave->cancellable);
g_object_unref (autosave->cancellable);
autosave->cancellable = NULL;
}
if (autosave->timeout_id > 0) {
g_source_remove (autosave->timeout_id);
autosave->timeout_id = 0;
}
/* Chain up to parent's dispose() method. */
parent_class = G_OBJECT_CLASS (e_composer_autosave_parent_class);
parent_class->dispose (object);
}
static void
composer_autosave_constructed (GObject *object)
{
EExtensible *extensible;
GObjectClass *parent_class;
/* Chain up to parent's constructed() method. */
parent_class = G_OBJECT_CLASS (e_composer_autosave_parent_class);
parent_class->constructed (object);
extensible = e_extension_get_extensible (E_EXTENSION (object));
g_signal_connect_swapped (
extensible, "notify::changed",
G_CALLBACK (composer_autosave_changed_cb), object);
}
static void
e_composer_autosave_class_init (EComposerAutosaveClass *class)
{
GObjectClass *object_class;
EExtensionClass *extension_class;
object_class = G_OBJECT_CLASS (class);
object_class->dispose = composer_autosave_dispose;
object_class->constructed = composer_autosave_constructed;
extension_class = E_EXTENSION_CLASS (class);
extension_class->extensible_type = E_TYPE_MSG_COMPOSER;
}
static void
e_composer_autosave_class_finalize (EComposerAutosaveClass *class)
{
}
static void
e_composer_autosave_init (EComposerAutosave *autosave)
{
autosave->cancellable = g_cancellable_new ();
}
void
e_composer_autosave_type_register (GTypeModule *type_module)
{
/* XXX G_DEFINE_DYNAMIC_TYPE declares a static type registration
* function, so we have to wrap it with a public function in
* order to register types from a separate compilation unit. */
e_composer_autosave_register_type (type_module);
}
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