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[evolution/account-mgmt: 42/55] Add 'imap-features' module.

commit f3197ab47c250118d499709a0a094986b90648e8
Author: Matthew Barnes <mbarnes redhat com>
Date:   Thu Mar 15 23:56:12 2012 -0400

    Add 'imap-features' module.
    
    Adds an extra page to EMailConfigNotebook for 'imap' accounts.
    
    Replaces the 'imap-features' plugin.

 configure.ac                                       |    4 +-
 modules/Makefile.am                                |    1 +
 modules/imap-features/Makefile.am                  |   33 ++
 .../imap-features/e-mail-config-header-manager.c   |  500 ++++++++++++++++++++
 .../imap-features/e-mail-config-header-manager.h   |   72 +++
 .../e-mail-config-imap-headers-page.c              |  434 +++++++++++++++++
 .../e-mail-config-imap-headers-page.h              |   74 +++
 modules/imap-features/evolution-imap-features.c    |  116 +++++
 plugins/imap-features/Makefile.am                  |   44 --
 plugins/imap-features/imap-headers.c               |  361 --------------
 plugins/imap-features/imap-headers.ui              |  327 -------------
 .../org-gnome-imap-features.eplug.xml              |   18 -
 12 files changed, 1232 insertions(+), 752 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f7fe21a..7d2123a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1298,7 +1298,7 @@ AC_ARG_ENABLE([plugins],
 	[enable_plugins="$enableval"],[enable_plugins=all])
 
 dnl Add any new plugins here
-plugins_base_always="itip-formatter default-source mark-all-read publish-calendar imap-features"
+plugins_base_always="itip-formatter default-source mark-all-read publish-calendar"
 
 plugins_base="$plugins_base_always"
 dist_plugins_base="$plugins_base_always"
@@ -1643,6 +1643,7 @@ modules/cal-config-local/Makefile
 modules/cal-config-weather/Makefile
 modules/cal-config-webcal/Makefile
 modules/composer-autosave/Makefile
+modules/imap-features/Makefile
 modules/mailto-handler/Makefile
 modules/mdn/Makefile
 modules/online-accounts/Makefile
@@ -1664,7 +1665,6 @@ plugins/email-custom-header/Makefile
 plugins/external-editor/Makefile
 plugins/face/Makefile
 plugins/image-inline/Makefile
-plugins/imap-features/Makefile
 plugins/itip-formatter/Makefile
 plugins/mail-notification/Makefile
 plugins/mail-to-task/Makefile
diff --git a/modules/Makefile.am b/modules/Makefile.am
index 46f4720..67f7b3c 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -35,6 +35,7 @@ SUBDIRS = \
 	$(CONFIG_WEATHER_DIR) \
 	cal-config-webcal \
 	composer-autosave \
+	imap-features \
 	mailto-handler \
 	mdn \
 	offline-alert \
diff --git a/modules/imap-features/Makefile.am b/modules/imap-features/Makefile.am
new file mode 100644
index 0000000..d49ddfa
--- /dev/null
+++ b/modules/imap-features/Makefile.am
@@ -0,0 +1,33 @@
+NULL =
+
+module_LTLIBRARIES = module-imap-features.la
+
+module_imap_features_la_CPPFLAGS = \
+	$(AM_CPPFLAGS)						\
+	-I$(top_srcdir)						\
+	-I$(top_srcdir)/widgets					\
+	-DG_LOG_DOMAIN=\"evolution-imap-features\"		\
+	$(EVOLUTION_DATA_SERVER_CFLAGS)				\
+	$(GNOME_PLATFORM_CFLAGS)				\
+	$(NULL)
+
+module_imap_features_la_SOURCES = \
+	evolution-imap-features.c				\
+	e-mail-config-header-manager.c				\
+	e-mail-config-header-manager.h				\
+	e-mail-config-imap-headers-page.c			\
+	e-mail-config-imap-headers-page.h			\
+	$(NULL)
+
+module_imap_features_la_LIBADD = \
+	$(top_builddir)/mail/libevolution-mail.la		\
+	$(top_builddir)/widgets/misc/libemiscwidgets.la		\
+	$(top_builddir)/libemail-engine/libemail-engine.la	\
+	$(EVOLUTION_DATA_SERVER_LIBS)				\
+	$(GNOME_PLATFORM_LIBS)					\
+	$(NULL)
+
+module_imap_features_la_LDFLAGS = \
+	-module -avoid-version $(NO_UNDEFINED)
+
+-include $(top_srcdir)/git.mk
diff --git a/modules/imap-features/e-mail-config-header-manager.c b/modules/imap-features/e-mail-config-header-manager.c
new file mode 100644
index 0000000..1e8e3ec
--- /dev/null
+++ b/modules/imap-features/e-mail-config-header-manager.c
@@ -0,0 +1,500 @@
+/*
+ * e-mail-config-header-manager.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-mail-config-header-manager.h"
+
+#define E_MAIL_CONFIG_HEADER_MANAGER_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_MAIL_CONFIG_HEADER_MANAGER, EMailConfigHeaderManagerPrivate))
+
+struct _EMailConfigHeaderManagerPrivate {
+	GHashTable *headers;
+
+	GtkWidget *entry;          /* not referenced */
+	GtkWidget *tree_view;      /* not referenced */
+	GtkWidget *add_button;     /* not referenced */
+	GtkWidget *remove_button;  /* not referenced */
+};
+
+enum {
+	PROP_0,
+	PROP_HEADERS
+};
+
+G_DEFINE_DYNAMIC_TYPE (
+	EMailConfigHeaderManager,
+	e_mail_config_header_manager,
+	GTK_TYPE_GRID)
+
+static gboolean
+mail_config_header_manager_header_is_valid (const gchar *header)
+{
+	gchar *stripped_header;
+	gboolean is_valid;
+	glong length;
+
+	if (header == NULL)
+		return FALSE;
+
+	stripped_header = g_strstrip (g_strdup (header));
+	length = g_utf8_strlen (stripped_header, -1);
+
+	is_valid =
+		(*stripped_header != '\0') &&
+		(g_utf8_strchr (stripped_header, length, ':') == NULL) &&
+		(g_utf8_strchr (stripped_header, length, ' ') == NULL);
+
+	g_free (stripped_header);
+
+	return is_valid;
+}
+
+static gboolean
+mail_config_header_manager_header_to_boolean (GBinding *binding,
+                                              const GValue *source_value,
+                                              GValue *target_value,
+                                              gpointer unused)
+{
+	gboolean is_valid;
+	const gchar *string;
+
+	string = g_value_get_string (source_value);
+	is_valid = mail_config_header_manager_header_is_valid (string);
+	g_value_set_boolean (target_value, is_valid);
+
+	return TRUE;
+}
+
+static void
+mail_config_header_manager_update_list (EMailConfigHeaderManager *manager)
+{
+	GtkTreeView *tree_view;
+	GtkTreeModel *tree_model;
+	GtkListStore *list_store;
+	GtkTreeSelection *selection;
+	GtkTreePath *path = NULL;
+	GList *list, *link;
+
+	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
+	selection = gtk_tree_view_get_selection (tree_view);
+
+	list = gtk_tree_selection_get_selected_rows (selection, &tree_model);
+	if (g_list_length (list) == 1)
+		path = gtk_tree_path_copy (list->data);
+	g_list_free_full (list, (GDestroyNotify) gtk_tree_path_free);
+
+	list_store = GTK_LIST_STORE (tree_model);
+	gtk_list_store_clear (list_store);
+
+	list = g_hash_table_get_keys (manager->priv->headers);
+	list = g_list_sort (list, (GCompareFunc) g_utf8_collate);
+
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		GtkTreeIter iter;
+		const gchar *header = link->data;
+		gtk_list_store_append (list_store, &iter);
+		gtk_list_store_set (list_store, &iter, 0, header, -1);
+	}
+
+	g_list_free (list);
+
+	if (path != NULL) {
+		gtk_tree_selection_select_path (selection, path);
+		if (!gtk_tree_selection_path_is_selected (selection, path))
+			if (gtk_tree_path_prev (path))
+				gtk_tree_selection_select_path (selection, path);
+		gtk_tree_path_free (path);
+	}
+}
+
+static gboolean
+mail_config_header_manager_add_header (EMailConfigHeaderManager *manager,
+                                       const gchar *header)
+{
+	gchar *stripped_header;
+
+	if (!mail_config_header_manager_header_is_valid (header))
+		return FALSE;
+
+	stripped_header = g_strstrip (g_strdup (header));
+
+	g_hash_table_replace (
+		manager->priv->headers,
+		stripped_header, stripped_header);
+
+	g_object_notify (G_OBJECT (manager), "headers");
+
+	mail_config_header_manager_update_list (manager);
+
+	return TRUE;
+}
+
+static void
+mail_config_header_manager_remove_selected (EMailConfigHeaderManager *manager)
+{
+	GtkTreeView *tree_view;
+	GtkTreeModel *tree_model;
+	GtkTreeSelection *selection;
+	GList *list, *link;
+
+	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
+	selection = gtk_tree_view_get_selection (tree_view);
+	list = gtk_tree_selection_get_selected_rows (selection, &tree_model);
+
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		GtkTreePath *path = link->data;
+		GtkTreeIter iter;
+		gchar *header;
+
+		gtk_tree_model_get_iter (tree_model, &iter, path);
+		gtk_tree_model_get (tree_model, &iter, 0, &header, -1);
+		g_hash_table_remove (manager->priv->headers, header);
+	}
+
+	g_list_free_full (list, (GDestroyNotify) gtk_tree_path_free);
+
+	g_object_notify (G_OBJECT (manager), "headers");
+
+	mail_config_header_manager_update_list (manager);
+}
+
+static void
+mail_config_header_manager_entry_activate (GtkEntry *entry,
+                                           EMailConfigHeaderManager *manager)
+{
+	const gchar *header;
+
+	header = gtk_entry_get_text (entry);
+	if (mail_config_header_manager_add_header (manager, header))
+		gtk_entry_set_text (entry, "");
+}
+
+static gboolean
+mail_config_header_manager_key_press_event (GtkTreeView *tree_view,
+                                            GdkEventKey *event,
+                                            EMailConfigHeaderManager *manager)
+{
+	if (event->keyval == GDK_KEY_Delete) {
+		mail_config_header_manager_remove_selected (manager);
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+static void
+mail_config_header_manager_add_clicked (GtkButton *button,
+                                        EMailConfigHeaderManager *manager)
+{
+	GtkEntry *entry;
+	const gchar *header;
+
+	entry = GTK_ENTRY (manager->priv->entry);
+
+	header = gtk_entry_get_text (entry);
+	if (mail_config_header_manager_add_header (manager, header))
+		gtk_entry_set_text (entry, "");
+}
+
+static void
+mail_config_header_manager_remove_clicked (GtkButton *button,
+                                           EMailConfigHeaderManager *manager)
+{
+	mail_config_header_manager_remove_selected (manager);
+}
+
+static void
+mail_config_header_manager_selection_changed (GtkTreeSelection *selection,
+                                              EMailConfigHeaderManager *manager)
+{
+	gint n_rows;
+
+	n_rows = gtk_tree_selection_count_selected_rows (selection);
+	gtk_widget_set_sensitive (manager->priv->remove_button, n_rows > 0);
+}
+
+static void
+mail_config_header_manager_set_property (GObject *object,
+                                         guint property_id,
+                                         const GValue *value,
+                                         GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_HEADERS:
+			e_mail_config_header_manager_set_headers (
+				E_MAIL_CONFIG_HEADER_MANAGER (object),
+				g_value_get_boxed (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+mail_config_header_manager_get_property (GObject *object,
+                                         guint property_id,
+                                         GValue *value,
+                                         GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_HEADERS:
+			g_value_take_boxed (
+				value,
+				e_mail_config_header_manager_dup_headers (
+				E_MAIL_CONFIG_HEADER_MANAGER (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+mail_config_header_manager_finalize (GObject *object)
+{
+	EMailConfigHeaderManagerPrivate *priv;
+
+	priv = E_MAIL_CONFIG_HEADER_MANAGER_GET_PRIVATE (object);
+
+	g_hash_table_destroy (priv->headers);
+
+	/* Chain up to parent's finalize() method. */
+	G_OBJECT_CLASS (e_mail_config_header_manager_parent_class)->
+		finalize (object);
+}
+
+static void
+mail_config_header_manager_constructed (GObject *object)
+{
+	EMailConfigHeaderManager *manager;
+	GtkTreeViewColumn *column;
+	GtkTreeSelection *selection;
+	GtkCellRenderer *renderer;
+	GtkListStore *list_store;
+	GtkWidget *widget;
+	GtkWidget *container;
+
+	manager = E_MAIL_CONFIG_HEADER_MANAGER (object);
+
+	/* Chain up to parent's constructed() method. */
+	G_OBJECT_CLASS (e_mail_config_header_manager_parent_class)->
+		constructed (object);
+
+	gtk_grid_set_row_spacing (GTK_GRID (manager), 6);
+	gtk_grid_set_column_spacing (GTK_GRID (manager), 12);
+
+	widget = gtk_entry_new ();
+	gtk_widget_set_hexpand (widget, TRUE);
+	gtk_grid_attach (GTK_GRID (manager), widget, 0, 0, 1, 1);
+	manager->priv->entry = widget;  /* not referenced */
+	gtk_widget_show (widget);
+
+	widget = gtk_scrolled_window_new (NULL, NULL);
+	gtk_scrolled_window_set_policy (
+		GTK_SCROLLED_WINDOW (widget),
+		GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+	gtk_scrolled_window_set_shadow_type (
+		GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
+	gtk_widget_set_hexpand (widget, TRUE);
+	gtk_widget_set_vexpand (widget, TRUE);
+	gtk_grid_attach (GTK_GRID (manager), widget, 0, 1, 1, 1);
+	gtk_widget_show (widget);
+
+	container = widget;
+
+	list_store = gtk_list_store_new (1, G_TYPE_STRING);
+	widget = gtk_tree_view_new_with_model (GTK_TREE_MODEL (list_store));
+	gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (widget), FALSE);
+	gtk_container_add (GTK_CONTAINER (container), widget);
+	manager->priv->tree_view = widget;  /* not referenced */
+	gtk_widget_show (widget);
+	g_object_unref (list_store);
+
+	selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));
+	gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
+
+	widget = gtk_button_box_new (GTK_ORIENTATION_VERTICAL);
+	gtk_box_set_spacing (GTK_BOX (widget), 6);
+	gtk_button_box_set_layout (
+		GTK_BUTTON_BOX (widget), GTK_BUTTONBOX_START);
+	gtk_grid_attach (GTK_GRID (manager), widget, 1, 0, 1, 2);
+	gtk_widget_show (widget);
+
+	container = widget;
+
+	widget = gtk_button_new_from_stock (GTK_STOCK_ADD);
+	gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
+	manager->priv->add_button = widget;  /* not referenced */
+	gtk_widget_show (widget);
+
+	widget = gtk_button_new_from_stock (GTK_STOCK_REMOVE);
+	gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
+	manager->priv->remove_button = widget;  /* not referenced */
+	gtk_widget_show (widget);
+
+	column = gtk_tree_view_column_new ();
+	gtk_tree_view_append_column (
+		GTK_TREE_VIEW (manager->priv->tree_view), column);
+
+	renderer = gtk_cell_renderer_text_new ();
+	gtk_tree_view_column_pack_start (column, renderer, TRUE);
+	gtk_cell_layout_add_attribute (
+		GTK_CELL_LAYOUT (column), renderer, "text", 0);
+
+	g_object_bind_property_full (
+		manager->priv->entry, "text",
+		manager->priv->add_button, "sensitive",
+		G_BINDING_SYNC_CREATE,
+		mail_config_header_manager_header_to_boolean,
+		NULL,
+		NULL, (GDestroyNotify) NULL);
+
+	g_signal_connect (
+		manager->priv->entry, "activate",
+		G_CALLBACK (mail_config_header_manager_entry_activate),
+		manager);
+
+	g_signal_connect (
+		manager->priv->tree_view, "key-press-event",
+		G_CALLBACK (mail_config_header_manager_key_press_event),
+		manager);
+
+	g_signal_connect (
+		manager->priv->add_button, "clicked",
+		G_CALLBACK (mail_config_header_manager_add_clicked),
+		manager);
+
+	g_signal_connect (
+		manager->priv->remove_button, "clicked",
+		G_CALLBACK (mail_config_header_manager_remove_clicked),
+		manager);
+
+	g_signal_connect (
+		selection, "changed",
+		G_CALLBACK (mail_config_header_manager_selection_changed),
+		manager);
+
+	mail_config_header_manager_selection_changed (selection, manager);
+}
+
+static void
+e_mail_config_header_manager_class_init (EMailConfigHeaderManagerClass *class)
+{
+	GObjectClass *object_class;
+
+	g_type_class_add_private (
+		class, sizeof (EMailConfigHeaderManagerPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = mail_config_header_manager_set_property;
+	object_class->get_property = mail_config_header_manager_get_property;
+	object_class->finalize = mail_config_header_manager_finalize;
+	object_class->constructed = mail_config_header_manager_constructed;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_HEADERS,
+		g_param_spec_boxed (
+			"headers",
+			"Headers",
+			"Array of header names",
+			G_TYPE_STRV,
+			G_PARAM_READWRITE));
+}
+
+static void
+e_mail_config_header_manager_class_finalize (EMailConfigHeaderManagerClass *class)
+{
+}
+
+static void
+e_mail_config_header_manager_init (EMailConfigHeaderManager *manager)
+{
+	manager->priv = E_MAIL_CONFIG_HEADER_MANAGER_GET_PRIVATE (manager);
+
+	manager->priv->headers = g_hash_table_new_full (
+		(GHashFunc) g_str_hash,
+		(GEqualFunc) g_str_equal,
+		(GDestroyNotify) g_free,
+		(GDestroyNotify) NULL);
+}
+
+void
+e_mail_config_header_manager_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_mail_config_header_manager_register_type (type_module);
+}
+
+GtkWidget *
+e_mail_config_header_manager_new (void)
+{
+	return g_object_new (E_TYPE_MAIL_CONFIG_HEADER_MANAGER, NULL);
+}
+
+gchar **
+e_mail_config_header_manager_dup_headers (EMailConfigHeaderManager *manager)
+{
+	GList *list, *link;
+	gchar **headers = NULL;
+	guint ii = 0;
+
+	g_return_val_if_fail (E_IS_MAIL_CONFIG_HEADER_MANAGER (manager), NULL);
+
+	list = g_hash_table_get_keys (manager->priv->headers);
+	list = g_list_sort (list, (GCompareFunc) g_utf8_collate);
+
+	if (list != NULL) {
+		headers = g_new0 (gchar *, g_list_length (list) + 1);
+		for (link = list; link != NULL; link = g_list_next (link))
+			headers[ii++] = g_strdup (link->data);
+		g_list_free (list);
+	}
+
+	return headers;
+}
+
+void
+e_mail_config_header_manager_set_headers (EMailConfigHeaderManager *manager,
+                                          const gchar * const *headers)
+{
+	gint ii = 0;
+
+	g_return_if_fail (E_IS_MAIL_CONFIG_HEADER_MANAGER (manager));
+
+	g_hash_table_remove_all (manager->priv->headers);
+
+	while (headers != NULL && headers[ii] != NULL) {
+		gchar *stripped_header;
+
+		stripped_header = g_strstrip (g_strdup (headers[ii++]));
+
+		if (*stripped_header != '\0')
+			g_hash_table_insert (
+				manager->priv->headers,
+				stripped_header, stripped_header);
+		else
+			g_free (stripped_header);
+	}
+
+	g_object_notify (G_OBJECT (manager), "headers");
+
+	mail_config_header_manager_update_list (manager);
+}
+
diff --git a/modules/imap-features/e-mail-config-header-manager.h b/modules/imap-features/e-mail-config-header-manager.h
new file mode 100644
index 0000000..27d047f
--- /dev/null
+++ b/modules/imap-features/e-mail-config-header-manager.h
@@ -0,0 +1,72 @@
+/*
+ * e-mail-config-header-manager.h
+ *
+ * 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/>
+ *
+ */
+
+#ifndef E_MAIL_CONFIG_HEADER_MANAGER_H
+#define E_MAIL_CONFIG_HEADER_MANAGER_H
+
+#include <gtk/gtk.h>
+
+/* Standard GObject macros */
+#define E_TYPE_MAIL_CONFIG_HEADER_MANAGER \
+	(e_mail_config_header_manager_get_type ())
+#define E_MAIL_CONFIG_HEADER_MANAGER(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_MAIL_CONFIG_HEADER_MANAGER, EMailConfigHeaderManager))
+#define E_MAIL_CONFIG_HEADER_MANAGER_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_MAIL_CONFIG_HEADER_MANAGER, EMailConfigHeaderManagerClass))
+#define E_IS_MAIL_CONFIG_HEADER_MANAGER(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_MAIL_CONFIG_HEADER_MANAGER))
+#define E_IS_MAIL_CONFIG_HEADER_MANAGER_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_MAIL_CONFIG_HEADER_MANAGER))
+#define E_MAIL_CONFIG_HEADER_MANAGER_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_MAIL_CONFIG_HEADER_MANAGER, EMailConfigHeaderManagerClass))
+
+G_BEGIN_DECLS
+
+typedef struct _EMailConfigHeaderManager EMailConfigHeaderManager;
+typedef struct _EMailConfigHeaderManagerClass EMailConfigHeaderManagerClass;
+typedef struct _EMailConfigHeaderManagerPrivate EMailConfigHeaderManagerPrivate;
+
+struct _EMailConfigHeaderManager {
+	GtkGrid parent;
+	EMailConfigHeaderManagerPrivate *priv;
+};
+
+struct _EMailConfigHeaderManagerClass {
+	GtkGridClass parent_class;
+};
+
+GType		e_mail_config_header_manager_get_type
+						(void) G_GNUC_CONST;
+void		e_mail_config_header_manager_type_register
+						(GTypeModule *type_module);
+GtkWidget *	e_mail_config_header_manager_new
+						(void);
+gchar **	e_mail_config_header_manager_dup_headers
+						(EMailConfigHeaderManager *manager);
+void		e_mail_config_header_manager_set_headers
+						(EMailConfigHeaderManager *manager,
+						 const gchar * const *headers);
+
+G_END_DECLS
+
+#endif /* E_MAIL_CONFIG_HEADER_MANAGER_H */
diff --git a/modules/imap-features/e-mail-config-imap-headers-page.c b/modules/imap-features/e-mail-config-imap-headers-page.c
new file mode 100644
index 0000000..6c9eaec
--- /dev/null
+++ b/modules/imap-features/e-mail-config-imap-headers-page.c
@@ -0,0 +1,434 @@
+/*
+ * e-mail-config-imap-headers-page.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-mail-config-imap-headers-page.h"
+
+#include <config.h>
+#include <glib/gi18n-lib.h>
+
+#include <libedataserver/e-source-camel.h>
+#include <libedataserver/e-source-mail-account.h>
+
+#include <mail/e-mail-config-security-page.h>
+
+#include "e-mail-config-header-manager.h"
+
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE, EMailConfigImapHeadersPagePrivate))
+
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE_SORT_ORDER \
+	(E_MAIL_CONFIG_SECURITY_PAGE_SORT_ORDER + 10)
+
+struct _EMailConfigImapHeadersPagePrivate {
+	ESource *account_source;
+	CamelSettings *settings;
+
+	GtkToggleButton *fetch_all_headers;  /* not referenced */
+	GtkToggleButton *fetch_bas_headers;  /* not referenced */
+	GtkToggleButton *fetch_bml_headers;  /* not referenced */
+};
+
+enum {
+	PROP_0,
+	PROP_ACCOUNT_SOURCE
+};
+
+/* Forward Declarations */
+static void	e_mail_config_imap_headers_page_interface_init
+					(EMailConfigPageInterface *interface);
+
+G_DEFINE_DYNAMIC_TYPE_EXTENDED (
+	EMailConfigImapHeadersPage,
+	e_mail_config_imap_headers_page,
+	GTK_TYPE_BOX,
+	0,
+	G_IMPLEMENT_INTERFACE_DYNAMIC (
+		E_TYPE_MAIL_CONFIG_PAGE,
+		e_mail_config_imap_headers_page_interface_init))
+
+static void
+mail_config_imap_headers_page_all_toggled (GtkToggleButton *toggle_button,
+                                           EMailConfigImapHeadersPage *page)
+{
+	if (gtk_toggle_button_get_active (toggle_button)) {
+		CamelSettings *settings;
+		CamelFetchHeadersType fetch_headers;
+
+		settings = page->priv->settings;
+		fetch_headers = CAMEL_FETCH_HEADERS_ALL;
+		g_object_set (settings, "fetch-headers", fetch_headers, NULL);
+	}
+}
+
+static void
+mail_config_imap_headers_page_bas_toggled (GtkToggleButton *toggle_button,
+                                           EMailConfigImapHeadersPage *page)
+{
+	if (gtk_toggle_button_get_active (toggle_button)) {
+		CamelSettings *settings;
+		CamelFetchHeadersType fetch_headers;
+
+		settings = page->priv->settings;
+		fetch_headers = CAMEL_FETCH_HEADERS_BASIC;
+		g_object_set (settings, "fetch-headers", fetch_headers, NULL);
+	}
+}
+
+static void
+mail_config_imap_headers_page_bml_toggled (GtkToggleButton *toggle_button,
+                                           EMailConfigImapHeadersPage *page)
+{
+	if (gtk_toggle_button_get_active (toggle_button)) {
+		CamelSettings *settings;
+		CamelFetchHeadersType fetch_headers;
+
+		settings = page->priv->settings;
+		fetch_headers = CAMEL_FETCH_HEADERS_BASIC_AND_MAILING_LIST;
+		g_object_set (settings, "fetch-headers", fetch_headers, NULL);
+	}
+}
+
+static void
+mail_config_imap_headers_page_set_account_source (EMailConfigImapHeadersPage *page,
+                                                  ESource *account_source)
+{
+	g_return_if_fail (E_IS_SOURCE (account_source));
+	g_return_if_fail (page->priv->account_source == NULL);
+
+	page->priv->account_source = g_object_ref (account_source);
+}
+
+static void
+mail_config_imap_headers_page_set_property (GObject *object,
+                                            guint property_id,
+                                            const GValue *value,
+                                            GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACCOUNT_SOURCE:
+			mail_config_imap_headers_page_set_account_source (
+				E_MAIL_CONFIG_IMAP_HEADERS_PAGE (object),
+				g_value_get_object (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+mail_config_imap_headers_page_get_property (GObject *object,
+                                            guint property_id,
+                                            GValue *value,
+                                            GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACCOUNT_SOURCE:
+			g_value_set_object (
+				value,
+				e_mail_config_imap_headers_page_get_account_source (
+				E_MAIL_CONFIG_IMAP_HEADERS_PAGE (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+mail_config_imap_headers_page_dispose (GObject *object)
+{
+	EMailConfigImapHeadersPagePrivate *priv;
+
+	priv = E_MAIL_CONFIG_IMAP_HEADERS_PAGE_GET_PRIVATE (object);
+
+	if (priv->account_source != NULL) {
+		g_object_unref (priv->account_source);
+		priv->account_source = NULL;
+	}
+
+	if (priv->settings != NULL) {
+		g_object_unref (priv->settings);
+		priv->settings = NULL;
+	}
+
+	/* Chain up to parent's dispose() method. */
+	G_OBJECT_CLASS (e_mail_config_imap_headers_page_parent_class)->
+		dispose (object);
+}
+
+static void
+mail_config_imap_headers_page_constructed (GObject *object)
+{
+	EMailConfigImapHeadersPage *page;
+	ESource *source;
+	ESourceCamel *camel_ext;
+	ESourceBackend *backend_ext;
+	CamelSettings *settings;
+	CamelFetchHeadersType fetch_headers;
+	GtkWidget *widget;
+	GtkWidget *container;
+	GtkToggleButton *toggle_button;
+	GSList *group = NULL;
+	const gchar *backend_name;
+	const gchar *extension_name;
+	const gchar *text;
+	gchar *markup;
+
+	page = E_MAIL_CONFIG_IMAP_HEADERS_PAGE (object);
+
+	/* Chain up to parent's constructed() method. */
+	G_OBJECT_CLASS (e_mail_config_imap_headers_page_parent_class)->
+		constructed (object);
+
+	source = e_mail_config_imap_headers_page_get_account_source (page);
+
+	extension_name = E_SOURCE_EXTENSION_MAIL_ACCOUNT;
+	backend_ext = e_source_get_extension (source, extension_name);
+	backend_name = e_source_backend_get_backend_name (backend_ext);
+
+	extension_name = e_source_camel_get_extension_name (backend_name);
+	camel_ext = e_source_get_extension (source, extension_name);
+	settings = e_source_camel_get_settings (camel_ext);
+
+	page->priv->settings = g_object_ref (settings);
+
+	gtk_orientable_set_orientation (
+		GTK_ORIENTABLE (page), GTK_ORIENTATION_VERTICAL);
+
+	gtk_box_set_spacing (GTK_BOX (page), 12);
+
+	/*** IMAP Headers ***/
+
+	/* Use row-spacing=0 so we can pack the "Basic Headers" hint
+	 * label closer to its radio button.  Unfortunately this means
+	 * we have to remember to set a top margin on all the children. */
+	widget = gtk_grid_new ();
+	gtk_grid_set_row_spacing (GTK_GRID (widget), 0);
+	gtk_grid_set_column_spacing (GTK_GRID (widget), 6);
+	gtk_box_pack_start (GTK_BOX (page), widget, FALSE, FALSE, 0);
+	gtk_widget_show (widget);
+
+	container = widget;
+
+	text = _("IMAP Headers");
+	markup = g_markup_printf_escaped ("<b>%s</b>", text);
+	widget = gtk_label_new (markup);
+	gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 0, 1, 1);
+	gtk_widget_show (widget);
+
+	text = _("Select a predefined set of IMAP headers to fetch.\n"
+		 "Note, larger sets of headers take longer to download.");
+	widget = gtk_label_new (text);
+	gtk_widget_set_margin_top (widget, 6);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_label_set_line_wrap (GTK_LABEL (widget), TRUE);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 1, 1, 1);
+	gtk_widget_show (widget);
+
+	text = _("_Fetch All Headers");
+	widget = gtk_radio_button_new_with_mnemonic (group, text);
+	gtk_widget_set_margin_top (widget, 6);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 2, 1, 1);
+	page->priv->fetch_all_headers = GTK_TOGGLE_BUTTON (widget);
+	gtk_widget_show (widget);
+
+	g_signal_connect (
+		widget, "toggled",
+		G_CALLBACK (mail_config_imap_headers_page_all_toggled), page);
+
+	group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (widget));
+
+	text = _("_Basic Headers (fastest)");
+	widget = gtk_radio_button_new_with_mnemonic (group, text);
+	gtk_widget_set_margin_top (widget, 6);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 3, 1, 1);
+	page->priv->fetch_bas_headers = GTK_TOGGLE_BUTTON (widget);
+	gtk_widget_show (widget);
+
+	g_signal_connect (
+		widget, "toggled",
+		G_CALLBACK (mail_config_imap_headers_page_bas_toggled), page);
+
+	group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (widget));
+
+	text = _("Use this if you are not filtering any mailing lists.");
+	markup = g_markup_printf_escaped ("<small>%s</small>", text);
+	widget = gtk_label_new (markup);
+	gtk_widget_set_margin_left (widget, 36);
+	gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 4, 1, 1);
+	gtk_widget_show (widget);
+	g_free (markup);
+
+	text = _("Basic and _Mailing List Headers (default)");
+	widget = gtk_radio_button_new_with_mnemonic (group, text);
+	gtk_widget_set_margin_top (widget, 6);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 5, 1, 1);
+	page->priv->fetch_bml_headers = GTK_TOGGLE_BUTTON (widget);
+	gtk_widget_show (widget);
+
+	g_signal_connect (
+		widget, "toggled",
+		G_CALLBACK (mail_config_imap_headers_page_bml_toggled), page);
+
+	/* Pick an initial radio button. */
+
+	g_object_get (settings, "fetch-headers", &fetch_headers, NULL);
+
+	switch (fetch_headers) {
+		case CAMEL_FETCH_HEADERS_ALL:
+			toggle_button = page->priv->fetch_all_headers;
+			break;
+
+		case CAMEL_FETCH_HEADERS_BASIC:
+			toggle_button = page->priv->fetch_bas_headers;
+			break;
+
+		case CAMEL_FETCH_HEADERS_BASIC_AND_MAILING_LIST:
+		default:
+			toggle_button = page->priv->fetch_bml_headers;
+			break;
+	}
+
+	gtk_toggle_button_set_active (toggle_button, TRUE);
+
+	/*** Custom Headers ***/
+
+	widget = gtk_grid_new ();
+	gtk_grid_set_row_spacing (GTK_GRID (widget), 6);
+	gtk_grid_set_column_spacing (GTK_GRID (widget), 6);
+	gtk_box_pack_start (GTK_BOX (page), widget, TRUE, TRUE, 0);
+	gtk_widget_show (widget);
+
+	g_object_bind_property (
+		page->priv->fetch_all_headers, "active",
+		widget, "sensitive",
+		G_BINDING_SYNC_CREATE |
+		G_BINDING_INVERT_BOOLEAN);
+
+	container = widget;
+
+	text = _("Custom Headers");
+	markup = g_markup_printf_escaped ("<b>%s</b>", text);
+	widget = gtk_label_new (markup);
+	gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 0, 1, 1);
+	gtk_widget_show (widget);
+
+	text = _("Specify any extra headers to fetch in addition "
+		 "to the predefined set of headers selected above.");
+	widget = gtk_label_new (text);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_label_set_line_wrap (GTK_LABEL (widget), TRUE);
+	gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 1, 1, 1);
+	gtk_widget_show (widget);
+
+	widget = e_mail_config_header_manager_new ();
+	gtk_widget_set_hexpand (widget, TRUE);
+	gtk_widget_set_vexpand (widget, TRUE);
+	gtk_widget_set_margin_left (widget, 12);
+	gtk_grid_attach (GTK_GRID (container), widget, 0, 2, 1, 1);
+	gtk_widget_show (widget);
+
+	g_object_bind_property (
+		settings, "fetch-headers-extra",
+		widget, "headers",
+		G_BINDING_BIDIRECTIONAL |
+		G_BINDING_SYNC_CREATE);
+}
+
+static void
+e_mail_config_imap_headers_page_class_init (EMailConfigImapHeadersPageClass *class)
+{
+	GObjectClass *object_class;
+
+	g_type_class_add_private (
+		class, sizeof (EMailConfigImapHeadersPagePrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = mail_config_imap_headers_page_set_property;
+	object_class->get_property = mail_config_imap_headers_page_get_property;
+	object_class->dispose = mail_config_imap_headers_page_dispose;
+	object_class->constructed = mail_config_imap_headers_page_constructed;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_ACCOUNT_SOURCE,
+		g_param_spec_object (
+			"account-source",
+			"Account Source",
+			"Mail account source being edited",
+			E_TYPE_SOURCE,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT_ONLY));
+}
+
+static void
+e_mail_config_imap_headers_page_class_finalize (EMailConfigImapHeadersPageClass *class)
+{
+}
+
+static void
+e_mail_config_imap_headers_page_interface_init (EMailConfigPageInterface *interface)
+{
+	interface->title = _("IMAP Headers");
+	interface->sort_order = E_MAIL_CONFIG_IMAP_HEADERS_PAGE_SORT_ORDER;
+}
+
+static void
+e_mail_config_imap_headers_page_init (EMailConfigImapHeadersPage *page)
+{
+	page->priv = E_MAIL_CONFIG_IMAP_HEADERS_PAGE_GET_PRIVATE (page);
+}
+
+void
+e_mail_config_imap_headers_page_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_mail_config_imap_headers_page_register_type (type_module);
+}
+
+EMailConfigPage *
+e_mail_config_imap_headers_page_new (ESource *account_source)
+{
+	g_return_val_if_fail (E_IS_SOURCE (account_source), NULL);
+
+	return g_object_new (
+		E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE,
+		"account-source", account_source, NULL);
+}
+
+ESource *
+e_mail_config_imap_headers_page_get_account_source (EMailConfigImapHeadersPage *page)
+{
+	g_return_val_if_fail (E_IS_MAIL_CONFIG_IMAP_HEADERS_PAGE (page), NULL);
+
+	return page->priv->account_source;
+}
+
diff --git a/modules/imap-features/e-mail-config-imap-headers-page.h b/modules/imap-features/e-mail-config-imap-headers-page.h
new file mode 100644
index 0000000..87a1a50
--- /dev/null
+++ b/modules/imap-features/e-mail-config-imap-headers-page.h
@@ -0,0 +1,74 @@
+/*
+ * e-mail-config-imap-headers-page.h
+ *
+ * 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/>
+ *
+ */
+
+#ifndef E_MAIL_CONFIG_IMAP_HEADERS_PAGE_H
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE_H
+
+#include <gtk/gtk.h>
+#include <libedataserver/e-source.h>
+
+#include <mail/e-mail-config-page.h>
+
+/* Standard GObject macros */
+#define E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE \
+	(e_mail_config_imap_headers_page_get_type ())
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE, EMailConfigImapHeadersPage))
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE, EMailConfigImapHeadersPageClass))
+#define E_IS_MAIL_CONFIG_IMAP_HEADERS_PAGE(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE))
+#define E_IS_MAIL_CONFIG_IMAP_HEADERS_PAGE_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE))
+#define E_MAIL_CONFIG_IMAP_HEADERS_PAGE_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_MAIL_CONFIG_IMAP_HEADERS_PAGE, EMailConfigImapHeadersPage))
+
+G_BEGIN_DECLS
+
+typedef struct _EMailConfigImapHeadersPage EMailConfigImapHeadersPage;
+typedef struct _EMailConfigImapHeadersPageClass EMailConfigImapHeadersPageClass;
+typedef struct _EMailConfigImapHeadersPagePrivate EMailConfigImapHeadersPagePrivate;
+
+struct _EMailConfigImapHeadersPage {
+	GtkBox parent;
+	EMailConfigImapHeadersPagePrivate *priv;
+};
+
+struct _EMailConfigImapHeadersPageClass {
+	GtkBoxClass parent_class;
+};
+
+GType		e_mail_config_imap_headers_page_get_type
+						(void) G_GNUC_CONST;
+void		e_mail_config_imap_headers_page_type_register
+						(GTypeModule *type_module);
+EMailConfigPage *
+		e_mail_config_imap_headers_page_new
+						(ESource *account_source);
+ESource *	e_mail_config_imap_headers_page_get_account_source
+						(EMailConfigImapHeadersPage *page);
+
+G_END_DECLS
+
+#endif /* E_MAIL_CONFIG_IMAP_HEADERS_PAGE_H */
+
diff --git a/modules/imap-features/evolution-imap-features.c b/modules/imap-features/evolution-imap-features.c
new file mode 100644
index 0000000..1b99daf
--- /dev/null
+++ b/modules/imap-features/evolution-imap-features.c
@@ -0,0 +1,116 @@
+/*
+ * evolution-imap-features.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 <config.h>
+#include <glib/gi18n-lib.h>
+
+#include <libebackend/e-extension.h>
+#include <libedataserver/e-source-mail-account.h>
+
+#include <mail/e-mail-config-notebook.h>
+
+#include "e-mail-config-header-manager.h"
+#include "e-mail-config-imap-headers-page.h"
+
+typedef EExtension EvolutionImapFeatures;
+typedef EExtensionClass EvolutionImapFeaturesClass;
+
+/* Module Entry Points */
+void e_module_load (GTypeModule *type_module);
+void e_module_unload (GTypeModule *type_module);
+
+/* Forward Declarations */
+GType evolution_imap_features_get_type (void);
+
+G_DEFINE_DYNAMIC_TYPE (
+	EvolutionImapFeatures,
+	evolution_imap_features,
+	E_TYPE_EXTENSION)
+
+static void
+evolution_imap_features_constructed (GObject *object)
+{
+	EExtension *extension;
+	EExtensible *extensible;
+	ESource *source;
+	ESourceBackend *backend_ext;
+	EMailConfigNotebook *notebook;
+	const gchar *backend_name;
+	const gchar *extension_name;
+	gboolean add_page = FALSE;
+
+	extension = E_EXTENSION (object);
+	extensible = e_extension_get_extensible (extension);
+
+	/* Chain up to parent's constructed() method. */
+	G_OBJECT_CLASS (evolution_imap_features_parent_class)->
+		constructed (object);
+
+	notebook = E_MAIL_CONFIG_NOTEBOOK (extensible);
+	source = e_mail_config_notebook_get_account_source (notebook);
+
+	extension_name = E_SOURCE_EXTENSION_MAIL_ACCOUNT;
+	backend_ext = e_source_get_extension (source, extension_name);
+	backend_name = e_source_backend_get_backend_name (backend_ext);
+
+	if (g_strcmp0 (backend_name, "imap") == 0)
+		add_page = TRUE;
+
+	if (add_page) {
+		EMailConfigPage *page;
+		page = e_mail_config_imap_headers_page_new (source);
+		e_mail_config_notebook_add_page (notebook, page);
+	}
+}
+
+static void
+evolution_imap_features_class_init (EvolutionImapFeaturesClass *class)
+{
+	GObjectClass *object_class;
+	EExtensionClass *extension_class;
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->constructed = evolution_imap_features_constructed;
+
+	extension_class = E_EXTENSION_CLASS (class);
+	extension_class->extensible_type = E_TYPE_MAIL_CONFIG_NOTEBOOK;
+}
+
+static void
+evolution_imap_features_class_finalize (EvolutionImapFeaturesClass *class)
+{
+}
+
+static void
+evolution_imap_features_init (EvolutionImapFeatures *extension)
+{
+}
+
+G_MODULE_EXPORT void
+e_module_load (GTypeModule *type_module)
+{
+	evolution_imap_features_register_type (type_module);
+	e_mail_config_header_manager_type_register (type_module);
+	e_mail_config_imap_headers_page_type_register (type_module);
+}
+
+G_MODULE_EXPORT void
+e_module_unload (GTypeModule *type_module)
+{
+}
+
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