/*
* e-activity.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/>
*
*/
/**
* SECTION: e-activity
* @include: e-util/e-util.h
* @short_description: Describe activities in progress
*
* #EActivity is used to track and describe application activities in
* progress. An #EActivity usually manifests in a user interface as a
* status bar message (see #EActivityProxy) or information bar message
* (see #EActivityBar), with optional progress indication and a cancel
* button which is linked to a #GCancellable.
**/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-activity.h"
#include <stdarg.h>
#include <glib/gi18n.h>
#include <camel/camel.h>
#include <libedataserver/libedataserver.h>
#include "e-util-enumtypes.h"
#define E_ACTIVITY_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE \
((obj), E_TYPE_ACTIVITY, EActivityPrivate))
struct _EActivityPrivate {
GCancellable *cancellable;
EAlertSink *alert_sink;
EActivityState state;
gchar *icon_name;
gchar *text;
gchar *last_known_text;
gdouble percent;
/* Whether to emit a runtime warning if we
* have to suppress a bogus percent value. */
gboolean warn_bogus_percent;
};
enum {
PROP_0,
PROP_ALERT_SINK,
PROP_CANCELLABLE,
PROP_ICON_NAME,
PROP_PERCENT,
PROP_STATE,
PROP_TEXT
};
G_DEFINE_TYPE (
EActivity,
e_activity,
G_TYPE_OBJECT)
static void
activity_camel_status_cb (EActivity *activity,
const gchar *description,
gint percent)
{
/* CamelOperation::status signals are always emitted from idle
* callbacks, so we don't have to screw around with locking. */
g_object_set (
activity, "percent", (gdouble) percent,
"text", description, NULL);
}
static void
activity_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id) {
case PROP_ALERT_SINK:
e_activity_set_alert_sink (
E_ACTIVITY (object),
g_value_get_object (value));
return;
case PROP_CANCELLABLE:
e_activity_set_cancellable (
E_ACTIVITY (object),
g_value_get_object (value));
return;
case PROP_ICON_NAME:
e_activity_set_icon_name (
E_ACTIVITY (object),
g_value_get_string (value));
return;
case PROP_PERCENT:
e_activity_set_percent (
E_ACTIVITY (object),
g_value_get_double (value));
return;
case PROP_STATE:
e_activity_set_state (
E_ACTIVITY (object),
g_value_get_enum (value));
return;
case PROP_TEXT:
e_activity_set_text (
E_ACTIVITY (object),
g_value_get_string (value));
return;
}
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
static void
activity_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id) {
case PROP_ALERT_SINK:
g_value_set_object (
value, e_activity_get_alert_sink (
E_ACTIVITY (object)));
return;
case PROP_CANCELLABLE:
g_value_set_object (
value, e_activity_get_cancellable (
E_ACTIVITY (object)));
return;
case PROP_ICON_NAME:
g_value_set_string (
value, e_activity_get_icon_name (
E_ACTIVITY (object)));
return;
case PROP_PERCENT:
g_value_set_double (
value, e_activity_get_percent (
E_ACTIVITY (object)));
return;
case PROP_STATE:
g_value_set_enum (
value, e_activity_get_state (
E_ACTIVITY (object)));
return;
case PROP_TEXT:
g_value_set_string (
value, e_activity_get_text (
E_ACTIVITY (object)));
return;
}
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
static void
activity_dispose (GObject *object)
{
EActivityPrivate *priv;
priv = E_ACTIVITY_GET_PRIVATE (object);
if (priv->alert_sink != NULL) {
g_object_unref (priv->alert_sink);
priv->alert_sink = NULL;
}
if (priv->cancellable != NULL) {
g_signal_handlers_disconnect_matched (
priv->cancellable,
G_SIGNAL_MATCH_DATA,
0, 0, NULL, NULL, object);
g_object_unref (priv->cancellable);
priv->cancellable = NULL;
}
/* Chain up to parent's dispose() method. */
G_OBJECT_CLASS (e_activity_parent_class)->dispose (object);
}
static void
activity_finalize (GObject *object)
{
EActivityPrivate *priv;
priv = E_ACTIVITY_GET_PRIVATE (object);
g_free (priv->icon_name);
g_free (priv->text);
g_free (priv->last_known_text);
/* Chain up to parent's finalize() method. */
G_OBJECT_CLASS (e_activity_parent_class)->finalize (object);
}
static gchar *
activity_describe (EActivity *activity)
{
GString *string;
GCancellable *cancellable;
EActivityState state;
const gchar *text;
gdouble percent;
text = e_activity_get_text (activity);
if (text == NULL)
return NULL;
string = g_string_sized_new (256);
cancellable = e_activity_get_cancellable (activity);
percent = e_activity_get_percent (activity);
state = e_activity_get_state (activity);
/* Sanity check the percentage. */
if (percent > 100.0) {
if (activity->priv->warn_bogus_percent) {
g_warning (
"Nonsensical (%d%% complete) reported on "
"activity \"%s\"", (gint) (percent), text);
activity->priv->warn_bogus_percent = FALSE;
}
percent = -1.0; /* suppress it */
} else {
activity->priv->warn_bogus_percent = TRUE;
}
if (state == E_ACTIVITY_CANCELLED) {
/* Translators: This is a cancelled activity. */
g_string_printf (string, _("%s (cancelled)"), text);
} else if (state == E_ACTIVITY_COMPLETED) {
/* Translators: This is a completed activity. */
g_string_printf (string, _("%s (completed)"), text);
} else if (state == E_ACTIVITY_WAITING) {
/* Translators: This is an activity waiting to run. */
g_string_printf (string, _("%s (waiting)"), text);
} else if (g_cancellable_is_cancelled (cancellable)) {
/* Translators: This is a running activity which
* the user has requested to cancel. */
g_string_printf (string, _("%s (cancelling)"), text);
} else if (percent <= 0.0) {
g_string_printf (string, _("%s"), text);
} else {
/* Translators: This is a running activity whose
* percent complete is known. */
g_string_printf (
string, _("%s (%d%% complete)"),
text, (gint) (percent));
}
return g_string_free (string, FALSE);
}
static void
e_activity_class_init (EActivityClass *class)
{
GObjectClass *object_class;
g_type_class_add_private (class, sizeof (EActivityPrivate));
object_class = G_OBJECT_CLASS (class);
object_class->set_property = activity_set_property;
object_class->get_property = activity_get_property;
object_class->dispose = activity_dispose;
object_class->finalize = activity_finalize;
class->describe = activity_describe;
g_object_class_install_property (
object_class,
PROP_ALERT_SINK,
g_param_spec_object (
"alert-sink",
NULL,
NULL,
E_TYPE_ALERT_SINK,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (
object_class,
PROP_CANCELLABLE,
g_param_spec_object (
"cancellable",
NULL,
NULL,
G_TYPE_CANCELLABLE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (
object_class,
PROP_ICON_NAME,
g_param_spec_string (
"icon-name",
NULL,
NULL,
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (
object_class,
PROP_PERCENT,
g_param_spec_double (
"percent",
NULL,
NULL,
-G_MAXDOUBLE,
G_MAXDOUBLE,
-1.0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (
object_class,
PROP_STATE,
g_param_spec_enum (
"state",
NULL,
NULL,
E_TYPE_ACTIVITY_STATE,
E_ACTIVITY_RUNNING,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (
object_class,
PROP_TEXT,
g_param_spec_string (
"text",
NULL,
NULL,
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
e_activity_init (EActivity *activity)
{
activity->priv = E_ACTIVITY_GET_PRIVATE (activity);
activity->priv->warn_bogus_percent = TRUE;
}
/**
* e_activity_new:
*
* Creates a new #EActivity.
*
* Returns: an #EActivity
**/
EActivity *
e_activity_new (void)
{
return g_object_new (E_TYPE_ACTIVITY, NULL);
}
/**
* e_activity_cancel:
* @activity: an #EActivity
*
* Convenience function cancels @activity's #EActivity:cancellable.
*
* <para>
* <note>
* This function will not set @activity's #EActivity:state to
* @E_ACTIVITY_CANCELLED. It merely requests that the associated
* operation be cancelled. Only after the operation finishes with
* a @G_IO_ERROR_CANCELLED should the @activity's #EActivity:state
* be changed (see e_activity_handle_cancellation()). During this
* interim period e_activity_describe() will indicate the activity
* is "cancelling".
* </note>
* </para>
**/
void
e_activity_cancel (EActivity *activity)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
/* This function handles NULL gracefully. */
g_cancellable_cancel (activity->priv->cancellable);
}
/**
* e_activity_describe:
* @activity: an #EActivity
*
* Returns a description of the current state of the @activity based on
* the #EActivity:text, #EActivity:percent and #EActivity:state properties.
* Suitable for displaying in a status bar or similar widget.
*
* Free the returned string with g_free() when finished with it.
*
* Returns: a description of @activity
**/
gchar *
e_activity_describe (EActivity *activity)
{
EActivityClass *class;
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
class = E_ACTIVITY_GET_CLASS (activity);
g_return_val_if_fail (class->describe != NULL, NULL);
return class->describe (activity);
}
/**
* e_activity_get_alert_sink:
* @activity: an #EActivity
*
* Returns the #EAlertSink for @activity, if one was provided.
*
* The #EActivity:alert-sink property is convenient for when the user
* should be alerted about a failed asynchronous operation. Generally
* an #EActivity:alert-sink is set prior to dispatching the operation,
* and retrieved by a callback function when the operation completes.
*
* Returns: an #EAlertSink, or %NULL
**/
EAlertSink *
e_activity_get_alert_sink (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
return activity->priv->alert_sink;
}
/**
* e_activity_set_alert_sink:
* @activity: an #EActivity
* @alert_sink: an #EAlertSink, or %NULL
*
* Sets (or clears) the #EAlertSink for @activity.
*
* The #EActivity:alert-sink property is convenient for when the user
* should be alerted about a failed asynchronous operation. Generally
* an #EActivity:alert-sink is set prior to dispatching the operation,
* and retrieved by a callback function when the operation completes.
**/
void
e_activity_set_alert_sink (EActivity *activity,
EAlertSink *alert_sink)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
if (activity->priv->alert_sink == alert_sink)
return;
if (alert_sink != NULL) {
g_return_if_fail (E_IS_ALERT_SINK (alert_sink));
g_object_ref (alert_sink);
}
if (activity->priv->alert_sink != NULL)
g_object_unref (activity->priv->alert_sink);
activity->priv->alert_sink = alert_sink;
g_object_notify (G_OBJECT (activity), "alert-sink");
}
/**
* e_activity_get_cancellable:
* @activity: an #EActivity
*
* Returns the #GCancellable for @activity, if one was provided.
*
* Generally the @activity's #EActivity:cancellable property holds the same
* #GCancellable instance passed to a cancellable function, so widgets like
* #EActivityBar can bind the #GCancellable to a cancel button.
*
* Returns: a #GCancellable, or %NULL
**/
GCancellable *
e_activity_get_cancellable (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
return activity->priv->cancellable;
}
/**
* e_activity_set_cancellable:
* @activity: an #EActivity
* @cancellable: a #GCancellable, or %NULL
*
* Sets (or clears) the #GCancellable for @activity.
*
* Generally the @activity's #EActivity:cancellable property holds the same
* #GCancellable instance passed to a cancellable function, so widgets like
* #EActivityBar can bind the #GCancellable to a cancel button.
**/
void
e_activity_set_cancellable (EActivity *activity,
GCancellable *cancellable)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
if (activity->priv->cancellable == cancellable)
return;
if (cancellable != NULL) {
g_return_if_fail (G_IS_CANCELLABLE (cancellable));
g_object_ref (cancellable);
}
if (activity->priv->cancellable != NULL) {
g_signal_handlers_disconnect_matched (
activity->priv->cancellable,
G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, activity);
g_object_unref (activity->priv->cancellable);
}
activity->priv->cancellable = cancellable;
/* If this is a CamelOperation, listen for status updates
* from it and propagate them to our own status properties. */
if (CAMEL_IS_OPERATION (cancellable))
g_signal_connect_swapped (
cancellable, "status",
G_CALLBACK (activity_camel_status_cb), activity);
g_object_notify (G_OBJECT (activity), "cancellable");
}
/**
* e_activity_get_icon_name:
* @activity: an #EActivity
*
* Returns the themed icon name for @activity, if one was provided.
*
* Generally widgets like #EActivityBar will honor the #EActivity:icon-name
* property while the @activity's #EActivity:state is @E_ACTIVITY_RUNNING or
* @E_ACTIVITY_WAITING, but will override the icon for @E_ACTIVITY_CANCELLED
* and @E_ACTIVITY_COMPLETED.
*
* Returns: a themed icon name, or %NULL
**/
const gchar *
e_activity_get_icon_name (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
return activity->priv->icon_name;
}
/**
* e_activity_set_icon_name:
* @activity: an #EActivity
* @icon_name: a themed icon name, or %NULL
*
* Sets (or clears) the themed icon name for @activity.
*
* Generally widgets like #EActivityBar will honor the #EActivity:icon-name
* property while the @activity's #EActivity:state is @E_ACTIVITY_RUNNING or
* @E_ACTIVITY_WAITING, but will override the icon for @E_ACTIVITY_CANCELLED
* and @E_ACTIVITY_COMPLETED.
**/
void
e_activity_set_icon_name (EActivity *activity,
const gchar *icon_name)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
if (g_strcmp0 (activity->priv->icon_name, icon_name) == 0)
return;
g_free (activity->priv->icon_name);
activity->priv->icon_name = g_strdup (icon_name);
g_object_notify (G_OBJECT (activity), "icon-name");
}
/**
* e_activity_get_percent:
* @activity: an #EActivity
*
* Returns the percent complete for @activity as a value between 0 and 100,
* or a negative value if the percent complete is unknown.
*
* Generally widgets like #EActivityBar will display the percent complete by
* way of e_activity_describe(), but only if the value is between 0 and 100.
*
* Returns: the percent complete, or a negative value if unknown
**/
gdouble
e_activity_get_percent (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), -1.0);
return activity->priv->percent;
}
/**
* e_activity_set_percent:
* @activity: an #EActivity
* @percent: the percent complete, or a negative value if unknown
*
* Sets the percent complete for @activity. The value should be between 0
* and 100, or negative if the percent complete is unknown.
*
* Generally widgets like #EActivityBar will display the percent complete by
* way of e_activity_describe(), but only if the value is between 0 and 100.
**/
void
e_activity_set_percent (EActivity *activity,
gdouble percent)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
if (activity->priv->percent == percent)
return;
activity->priv->percent = percent;
g_object_notify (G_OBJECT (activity), "percent");
}
/**
* e_activity_get_state:
* @activity: an #EActivity
*
* Returns the state of @activity.
*
* Generally widgets like #EActivityBar will display the activity state by
* way of e_activity_describe() and possibly an icon. The activity state is
* @E_ACTIVITY_RUNNING by default, and is usually only changed once when the
* associated operation is finished.
*
* Returns: an #EActivityState
**/
EActivityState
e_activity_get_state (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), 0);
return activity->priv->state;
}
/**
* e_activity_set_state:
* @activity: an #EActivity
* @state: an #EActivityState
*
* Sets the state of @activity.
*
* Generally widgets like #EActivityBar will display the activity state by
* way of e_activity_describe() and possibly an icon. The activity state is
* @E_ACTIVITY_RUNNING by default, and is usually only changed once when the
* associated operation is finished.
**/
void
e_activity_set_state (EActivity *activity,
EActivityState state)
{
g_return_if_fail (E_IS_ACTIVITY (activity));
if (activity->priv->state == state)
return;
activity->priv->state = state;
g_object_notify (G_OBJECT (activity), "state");
}
/**
* e_activity_get_text:
* @activity: an #EActivity
*
* Returns a message describing what @activity is doing.
*
* Generally widgets like #EActivityBar will display the message by way of
* e_activity_describe().
*
* Returns: a descriptive message
**/
const gchar *
e_activity_get_text (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
return activity->priv->text;
}
/**
* e_activity_set_text:
* @activity: an #EActivity
* @text: a descriptive message, or %NULL
*
* Sets (or clears) a message describing what @activity is doing.
*
* Generally widgets like #EActivityBar will display the message by way of
* e_activity_describe().
**/
void
e_activity_set_text (EActivity *activity,
const gchar *text)
{
gchar *last_known_text = NULL;
g_return_if_fail (E_IS_ACTIVITY (activity));
if (g_strcmp0 (activity->priv->text, text) == 0)
return;
g_free (activity->priv->text);
activity->priv->text = g_strdup (text);
/* See e_activity_get_last_known_text(). */
last_known_text = e_util_strdup_strip (text);
if (last_known_text != NULL) {
g_free (activity->priv->last_known_text);
activity->priv->last_known_text = last_known_text;
}
g_object_notify (G_OBJECT (activity), "text");
}
/**
* e_activity_get_last_known_text:
* @activity: an #EActivity
*
* Returns the last non-empty #EActivity:text value, so it's possible to
* identify what the @activity <emphasis>was</emphasis> doing even if it
* currently has no description.
*
* Mostly useful for debugging.
*
* Returns: a descriptive message, or %NULL
**/
const gchar *
e_activity_get_last_known_text (EActivity *activity)
{
g_return_val_if_fail (E_IS_ACTIVITY (activity), NULL);
return activity->priv->last_known_text;
}
/**
* e_activity_handle_cancellation:
* @activity: an #EActivity
* @error: a #GError, or %NULL
*
* Convenience function sets @activity's #EActivity:state to
* @E_ACTIVITY_CANCELLED if @error is @G_IO_ERROR_CANCELLED.
*
* Returns: %TRUE if @activity was set to @E_ACTIVITY_CANCELLED
**/
gboolean
e_activity_handle_cancellation (EActivity *activity,
const GError *error)
{
gboolean handled = FALSE;
g_return_val_if_fail (E_IS_ACTIVITY (activity), FALSE);
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
e_activity_set_state (activity, E_ACTIVITY_CANCELLED);
handled = TRUE;
}
return handled;
}
