Composer: Show cancellable operations and errors inline.

'Send' and 'Save Draft' are now asynchronous and run outside of
Evolution's MailMsg infrastructure.

Add an EActivityBar to the composer window so these asynchronous
operations can be tracked and cancelled even in the absense of a main
window.  Also add an EAlertBar to the composer window so error messages
can be shown directly in the window.

Instead of calling e_alert_dialog_run_for_args(), call e_alert_submit()
and pass the EMsgComposer as the widget argument.  The EMsgComposer will
decide whether to show an EAlertDialog or use the EAlertBar, depending
on the GtkMessageType of the alert.

1 files changed, 351 insertions, 0 deletions

diff --git a/widgets/misc/e-activity-bar.c b/widgets/misc/e-activity-bar.c
new file mode 100644
index 0000000000..0337822adc
--- /dev/null
+++ b/widgets/misc/e-activity-bar.c
@@ -0,0 +1,351 @@
+/*
+ * e-activity-bar.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/>
+ *
+ */
+
+#include "e-activity-bar.h"
+
+#define E_ACTIVITY_BAR_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_ACTIVITY_BAR, EActivityBarPrivate))
+
+#define FEEDBACK_PERIOD		1 /* seconds */
+
+struct _EActivityBarPrivate {
+	EActivity *activity;	/* weak reference */
+	GtkWidget *image;	/* not referenced */
+	GtkWidget *label;	/* not referenced */
+	GtkWidget *cancel;	/* not referenced */
+
+	/* If the user clicks the Cancel button, keep the cancelled
+	 * EActivity object alive for a short duration so the user
+	 * gets some visual feedback that cancellation worked. */
+	guint timeout_id;
+};
+
+enum {
+	PROP_0,
+	PROP_ACTIVITY
+};
+
+G_DEFINE_TYPE (
+	EActivityBar,
+	e_activity_bar,
+	GTK_TYPE_INFO_BAR)
+
+static void
+activity_bar_update (EActivityBar *bar)
+{
+	EActivity *activity;
+	GCancellable *cancellable;
+	const gchar *icon_name;
+	gboolean cancelled;
+	gboolean completed;
+	gboolean sensitive;
+	gboolean visible;
+	gchar *description;
+
+	activity = e_activity_bar_get_activity (bar);
+
+	if (activity == NULL) {
+		gtk_widget_hide (GTK_WIDGET (bar));
+		return;
+	}
+
+	cancellable = e_activity_get_cancellable (activity);
+	cancelled = g_cancellable_is_cancelled (cancellable);
+	completed = e_activity_is_completed (activity);
+	icon_name = e_activity_get_icon_name (activity);
+
+	description = e_activity_describe (activity);
+	gtk_label_set_text (GTK_LABEL (bar->priv->label), description);
+
+	if (cancelled) {
+		PangoAttribute *attr;
+		PangoAttrList *attr_list;
+
+		attr_list = pango_attr_list_new ();
+
+		attr = pango_attr_strikethrough_new (TRUE);
+		pango_attr_list_insert (attr_list, attr);
+
+		gtk_label_set_attributes (
+			GTK_LABEL (bar->priv->label), attr_list);
+
+		pango_attr_list_unref (attr_list);
+	} else
+		gtk_label_set_attributes (
+			GTK_LABEL (bar->priv->label), NULL);
+
+	if (cancelled)
+		gtk_image_set_from_stock (
+			GTK_IMAGE (bar->priv->image),
+			GTK_STOCK_CANCEL, GTK_ICON_SIZE_BUTTON);
+	else {
+		if (completed)
+			icon_name = "emblem-default";
+		gtk_image_set_from_icon_name (
+			GTK_IMAGE (bar->priv->image),
+			icon_name, GTK_ICON_SIZE_BUTTON);
+	}
+
+	visible = (icon_name != NULL);
+	gtk_widget_set_visible (bar->priv->image, visible);
+
+	visible = (cancellable != NULL);
+	gtk_widget_set_visible (bar->priv->cancel, visible);
+
+	sensitive = !cancelled && !completed;
+	gtk_widget_set_sensitive (bar->priv->cancel, sensitive);
+
+	visible = (description != NULL && *description != '\0');
+	gtk_widget_set_visible (GTK_WIDGET (bar), visible);
+
+	g_free (description);
+}
+
+static void
+activity_bar_cancel (EActivityBar *bar)
+{
+	EActivity *activity;
+	GCancellable *cancellable;
+
+	activity = e_activity_bar_get_activity (bar);
+	g_return_if_fail (E_IS_ACTIVITY (activity));
+
+	cancellable = e_activity_get_cancellable (activity);
+	g_cancellable_cancel (cancellable);
+}
+
+static void
+activity_bar_feedback (EActivityBar *bar)
+{
+	EActivity *activity;
+
+	activity = e_activity_bar_get_activity (bar);
+	g_return_if_fail (E_IS_ACTIVITY (activity));
+
+	if (bar->priv->timeout_id > 0)
+		g_source_remove (bar->priv->timeout_id);
+
+	/* Hold a reference on the EActivity for a short
+	 * period so the activity bar stays visible. */
+	bar->priv->timeout_id = g_timeout_add_seconds_full (
+		G_PRIORITY_LOW, FEEDBACK_PERIOD, (GSourceFunc) gtk_false,
+		g_object_ref (activity), (GDestroyNotify) g_object_unref);
+}
+
+static void
+activity_bar_weak_notify_cb (EActivityBar *bar,
+                             GObject *where_the_object_was)
+{
+	bar->priv->activity = NULL;
+	e_activity_bar_set_activity (bar, NULL);
+}
+
+static void
+activity_bar_set_property (GObject *object,
+                           guint property_id,
+                           const GValue *value,
+                           GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACTIVITY:
+			e_activity_bar_set_activity (
+				E_ACTIVITY_BAR (object),
+				g_value_get_object (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+activity_bar_get_property (GObject *object,
+                           guint property_id,
+                           GValue *value,
+                           GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACTIVITY:
+			g_value_set_object (
+				value, e_activity_bar_get_activity (
+				E_ACTIVITY_BAR (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+activity_bar_dispose (GObject *object)
+{
+	EActivityBarPrivate *priv;
+
+	priv = E_ACTIVITY_BAR_GET_PRIVATE (object);
+
+	if (priv->timeout_id > 0) {
+		g_source_remove (priv->timeout_id);
+		priv->timeout_id = 0;
+	}
+
+	if (priv->activity != NULL) {
+		g_signal_handlers_disconnect_matched (
+			priv->activity, G_SIGNAL_MATCH_DATA,
+			0, 0, NULL, NULL, object);
+		g_object_weak_unref (
+			G_OBJECT (priv->activity), (GWeakNotify)
+			activity_bar_weak_notify_cb, object);
+		priv->activity = NULL;
+	}
+
+	/* Chain up to parent's dispose() method. */
+	G_OBJECT_CLASS (e_activity_bar_parent_class)->dispose (object);
+}
+
+static void
+e_activity_bar_class_init (EActivityBarClass *class)
+{
+	GObjectClass *object_class;
+
+	g_type_class_add_private (class, sizeof (EActivityBarPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = activity_bar_set_property;
+	object_class->get_property = activity_bar_get_property;
+	object_class->dispose = activity_bar_dispose;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_ACTIVITY,
+		g_param_spec_object (
+			"activity",
+			NULL,
+			NULL,
+			E_TYPE_ACTIVITY,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT));
+}
+
+static void
+e_activity_bar_init (EActivityBar *bar)
+{
+	GtkWidget *container;
+	GtkWidget *widget;
+
+	bar->priv = E_ACTIVITY_BAR_GET_PRIVATE (bar);
+
+	container = gtk_info_bar_get_content_area (GTK_INFO_BAR (bar));
+
+	widget = gtk_hbox_new (FALSE, 12);
+	gtk_container_add (GTK_CONTAINER (container), widget);
+	gtk_widget_show (widget);
+
+	container = widget;
+
+	widget = gtk_image_new ();
+	gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
+	bar->priv->image = widget;
+	gtk_widget_show (widget);
+
+	widget = gtk_label_new (NULL);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_label_set_ellipsize (GTK_LABEL (widget), PANGO_ELLIPSIZE_END);
+	gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
+	bar->priv->label = widget;
+	gtk_widget_show (widget);
+
+	/* This is only shown if the EActivity has a GCancellable. */
+	widget = gtk_button_new_from_stock (GTK_STOCK_CANCEL);
+	gtk_info_bar_add_action_widget (
+		GTK_INFO_BAR (bar), widget, GTK_RESPONSE_CANCEL);
+	bar->priv->cancel = widget;
+	gtk_widget_hide (widget);
+
+	g_signal_connect_swapped (
+		widget, "clicked",
+		G_CALLBACK (activity_bar_cancel), bar);
+}
+
+GtkWidget *
+e_activity_bar_new (void)
+{
+	return g_object_new (E_TYPE_ACTIVITY_BAR, NULL);
+}
+
+EActivity *
+e_activity_bar_get_activity (EActivityBar *bar)
+{
+	g_return_val_if_fail (E_IS_ACTIVITY_BAR (bar), NULL);
+
+	return bar->priv->activity;
+}
+
+void
+e_activity_bar_set_activity (EActivityBar *bar,
+                             EActivity *activity)
+{
+	g_return_if_fail (E_IS_ACTIVITY_BAR (bar));
+
+	if (activity != NULL) {
+		g_return_if_fail (E_IS_ACTIVITY (activity));
+		g_object_weak_ref (
+			G_OBJECT (activity), (GWeakNotify)
+			activity_bar_weak_notify_cb, bar);
+	}
+
+	if (bar->priv->timeout_id > 0) {
+		g_source_remove (bar->priv->timeout_id);
+		bar->priv->timeout_id = 0;
+	}
+
+	if (bar->priv->activity != NULL) {
+		g_signal_handlers_disconnect_matched (
+			bar->priv->activity, G_SIGNAL_MATCH_DATA,
+			0, 0, NULL, NULL, bar);
+		g_object_weak_unref (
+			G_OBJECT (bar->priv->activity),
+			(GWeakNotify) activity_bar_weak_notify_cb, bar);
+	}
+
+	bar->priv->activity = activity;
+
+	if (activity != NULL) {
+		g_signal_connect_swapped (
+			activity, "cancelled",
+			G_CALLBACK (activity_bar_feedback), bar);
+
+		g_signal_connect_swapped (
+			activity, "completed",
+			G_CALLBACK (activity_bar_feedback), bar);
+
+		g_signal_connect_swapped (
+			activity, "cancelled",
+			G_CALLBACK (activity_bar_update), bar);
+
+		g_signal_connect_swapped (
+			activity, "completed",
+			G_CALLBACK (activity_bar_update), bar);
+
+		g_signal_connect_swapped (
+			activity, "notify",
+			G_CALLBACK (activity_bar_update), bar);
+	}
+
+	activity_bar_update (bar);
+
+	g_object_notify (G_OBJECT (bar), "activity");
+}