path: root/mail/em-subscription-editor.c

/*
 * em-subscription-editor.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 "em-subscription-editor.h"

#include <config.h>
#include <string.h>
#include <glib/gi18n-lib.h>

#include "mail-tools.h"
#include "mail-ops.h"
#include "mail-mt.h"

#include <e-util/e-util.h>
#include <e-util/e-account-utils.h>
#include <e-util/e-util-private.h>
#include <e-util/gconf-bridge.h>

#include "em-folder-utils.h"

/* backward-compatibility cruft */
#include "e-util/gtk-compat.h"

#define EM_SUBSCRIPTION_EDITOR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_SUBSCRIPTION_EDITOR, EMSubscriptionEditorPrivate))

#define FOLDER_CAN_SELECT(folder_info) \
    ((folder_info) != NULL && \
    ((folder_info)->flags & CAMEL_FOLDER_NOSELECT) == 0)
#define FOLDER_SUBSCRIBED(folder_info) \
    ((folder_info) != NULL && \
    ((folder_info)->flags & CAMEL_FOLDER_SUBSCRIBED) != 0)

typedef struct _AsyncContext AsyncContext;
typedef struct _StoreData StoreData;

struct _EMSubscriptionEditorPrivate {
    CamelSession *session;
    EAccount *initial_account;

    GtkWidget *combo_box;       /* not referenced */
    GtkWidget *entry;       /* not referenced */
    GtkWidget *notebook;        /* not referenced */
    GtkWidget *subscribe_button;    /* not referenced */
    GtkWidget *unsubscribe_button;  /* not referenced */
    GtkWidget *collapse_all_button; /* not referenced */
    GtkWidget *expand_all_button;   /* not referenced */
    GtkWidget *refresh_button;  /* not referenced */
    GtkWidget *stop_button;     /* not referenced */

    /* Indicies coincide with the combo box. */
    GPtrArray *stores;

    /* Points at an item in the stores array. */
    StoreData *active;

    /* Casefolded search string. */
    gchar *search_string;

    guint timeout_id;
};

struct _AsyncContext {
    EMSubscriptionEditor *editor;
    CamelFolderInfo *folder_info;
    GtkTreeRowReference *reference;
};

struct _StoreData {
    EAccount *account;
    CamelStore *store;
    GtkTreeView *tree_view;
    GtkTreeModel *list_store;
    GtkTreeModel *tree_store;
    GCancellable *cancellable;
    CamelFolderInfo *folder_info;
    gboolean filtered_view;
    gboolean needs_refresh;
};

enum {
    PROP_0,
    PROP_ACCOUNT,
    PROP_SESSION
};

enum {
    COL_CASEFOLDED,     /* G_TYPE_STRING  */
    COL_FOLDER_NAME,    /* G_TYPE_STRING  */
    COL_FOLDER_ICON,    /* G_TYPE_STRING  */
    COL_FOLDER_INFO,    /* G_TYPE_POINTER */
    N_COLUMNS
};

G_DEFINE_TYPE (EMSubscriptionEditor, em_subscription_editor, GTK_TYPE_DIALOG)

static void
async_context_free (AsyncContext *context)
{
    g_object_unref (context->editor);
    gtk_tree_row_reference_free (context->reference);

    g_slice_free (AsyncContext, context);
}

static void
store_data_free (StoreData *data)
{
    if (data->account != NULL)
        g_object_unref (data->account);

    if (data->store != NULL)
        g_object_unref (data->store);

    if (data->tree_view != NULL)
        g_object_unref (data->tree_view);

    if (data->list_store != NULL)
        g_object_unref (data->list_store);

    if (data->tree_store != NULL)
        g_object_unref (data->tree_store);

    if (data->cancellable != NULL) {
        g_cancellable_cancel (data->cancellable);
        g_object_unref (data->cancellable);
    }

    camel_folder_info_free (data->folder_info);

    g_slice_free (StoreData, data);
}

static void
subscription_editor_populate (EMSubscriptionEditor *editor,
                              CamelFolderInfo *folder_info,
                              GtkTreeIter *parent)
{
    GtkTreeView *tree_view;
    GtkListStore *list_store;
    GtkTreeStore *tree_store;

    tree_view = editor->priv->active->tree_view;
    list_store = GTK_LIST_STORE (editor->priv->active->list_store);
    tree_store = GTK_TREE_STORE (editor->priv->active->tree_store);

    while (folder_info != NULL) {
        GtkTreeIter iter;
        const gchar *icon_name;
        gchar *casefolded;

        icon_name =
            em_folder_utils_get_icon_name (folder_info->flags);

        casefolded = g_utf8_casefold (folder_info->full_name, -1);

        gtk_list_store_append (list_store, &iter);

        gtk_list_store_set (
            list_store, &iter,
            COL_CASEFOLDED, casefolded,
            COL_FOLDER_ICON, icon_name,
            COL_FOLDER_NAME, folder_info->full_name,
            COL_FOLDER_INFO, folder_info, -1);

        gtk_tree_store_append (tree_store, &iter, parent);

        gtk_tree_store_set (
            tree_store, &iter,
            COL_CASEFOLDED, NULL,  /* not needed */
            COL_FOLDER_ICON, icon_name,
            COL_FOLDER_NAME, folder_info->name,
            COL_FOLDER_INFO, folder_info, -1);

        if (FOLDER_SUBSCRIBED (folder_info)) {
            GtkTreePath *path;

            path = gtk_tree_model_get_path (
                GTK_TREE_MODEL (tree_store), &iter);
            gtk_tree_view_expand_to_path (tree_view, path);
            gtk_tree_path_free (path);
        }

        g_free (casefolded);

        if (folder_info->child != NULL)
            subscription_editor_populate (
                editor, folder_info->child, &iter);

        folder_info = folder_info->next;
    }
}

static void
subscription_editor_get_folder_info_done (CamelStore *store,
                                          GAsyncResult *result,
                                          EMSubscriptionEditor *editor)
{
    GtkTreePath *path;
    GtkTreeView *tree_view;
    GtkTreeModel *list_store;
    GtkTreeModel *tree_store;
    GtkTreeSelection *selection;
    CamelFolderInfo *folder_info;
    GdkWindow *window;
    GError *error = NULL;

    folder_info = camel_store_get_folder_info_finish (
        store, result, &error);

    /* Just return quietly if we were cancelled. */
    if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
        g_warn_if_fail (folder_info == NULL);
        g_error_free (error);
        goto exit;
    }

    gtk_widget_set_sensitive (editor->priv->notebook, TRUE);
    gtk_widget_set_sensitive (editor->priv->refresh_button, TRUE);
    gtk_widget_set_sensitive (editor->priv->stop_button, FALSE);

    window = gtk_widget_get_window (GTK_WIDGET (editor));
    gdk_window_set_cursor (window, NULL);

    /* XXX Do something smarter with errors. */
    if (error != NULL) {
        g_warn_if_fail (folder_info == NULL);
        g_warning ("%s", error->message);
        g_error_free (error);
        goto exit;
    }

    g_return_if_fail (folder_info != NULL);

    camel_folder_info_free (editor->priv->active->folder_info);
    editor->priv->active->folder_info = folder_info;

    tree_view = editor->priv->active->tree_view;
    list_store = editor->priv->active->list_store;
    tree_store = editor->priv->active->tree_store;

    gtk_list_store_clear (GTK_LIST_STORE (list_store));
    gtk_tree_store_clear (GTK_TREE_STORE (tree_store));
    subscription_editor_populate (editor, folder_info, NULL);

    path = gtk_tree_path_new_first ();
    selection = gtk_tree_view_get_selection (tree_view);
    gtk_tree_selection_select_path (selection, path);
    gtk_tree_path_free (path);

    gtk_widget_grab_focus (GTK_WIDGET (tree_view));

exit:
    g_object_unref (editor);
}

static void
subscription_editor_subscribe_folder_done (CamelStore *store,
                                           GAsyncResult *result,
                                           AsyncContext *context)
{
    GtkTreeView *tree_view;
    GtkTreeModel *tree_model;
    GtkTreeSelection *selection;
    GtkTreePath *path;
    GtkTreeIter iter;
    GdkWindow *window;
    GError *error = NULL;

    camel_store_subscribe_folder_finish (store, result, &error);

    /* Just return quietly if we were cancelled. */
    if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
        g_error_free (error);
        goto exit;
    }

    /* XXX Do something smarter with errors. */
    if (error == NULL)
        context->folder_info->flags |= CAMEL_FOLDER_SUBSCRIBED;
    else {
        g_warning ("%s", error->message);
        g_error_free (error);
    }

    gtk_widget_set_sensitive (context->editor->priv->notebook, TRUE);
    gtk_widget_set_sensitive (context->editor->priv->refresh_button, TRUE);
    gtk_widget_set_sensitive (context->editor->priv->stop_button, FALSE);

    window = gtk_widget_get_window (GTK_WIDGET (context->editor));
    gdk_window_set_cursor (window, NULL);

    /* Update the Subscription/Unsubscription buttons. */
    tree_view = context->editor->priv->active->tree_view;
    selection = gtk_tree_view_get_selection (tree_view);
    g_signal_emit_by_name (selection, "changed");

    /* Update the toggle renderer in the selected row. */
    tree_model = gtk_tree_row_reference_get_model (context->reference);
    path = gtk_tree_row_reference_get_path (context->reference);
    gtk_tree_model_get_iter (tree_model, &iter, path);
    gtk_tree_model_row_changed (tree_model, path, &iter);
    gtk_tree_path_free (path);

exit:
    async_context_free (context);
}

static void
subscription_editor_unsubscribe_folder_done (CamelStore *store,
                                             GAsyncResult *result,
                                             AsyncContext *context)
{
    GtkTreeView *tree_view;
    GtkTreeModel *tree_model;
    GtkTreeSelection *selection;
    GtkTreePath *path;
    GtkTreeIter iter;
    GdkWindow *window;
    GError *error = NULL;

    camel_store_unsubscribe_folder_finish (store, result, &error);

    /* Just return quietly if we were cancelled. */
    if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
        g_error_free (error);
        goto exit;
    }

    /* XXX Do something smarter with errors. */
    if (error == NULL)
        context->folder_info->flags &= ~CAMEL_FOLDER_SUBSCRIBED;
    else {
        g_warning ("%s", error->message);
        g_error_free (error);
    }

    gtk_widget_set_sensitive (context->editor->priv->notebook, TRUE);
    gtk_widget_set_sensitive (context->editor->priv->refresh_button, TRUE);
    gtk_widget_set_sensitive (context->editor->priv->stop_button, FALSE);

    window = gtk_widget_get_window (GTK_WIDGET (context->editor));
    gdk_window_set_cursor (window, NULL);

    /* Update the Subscription/Unsubscription buttons. */
    tree_view = context->editor->priv->active->tree_view;
    selection = gtk_tree_view_get_selection (tree_view);
    g_signal_emit_by_name (selection, "changed");

    /* Update the toggle renderer in the selected row. */
    tree_model = gtk_tree_row_reference_get_model (context->reference);
    path = gtk_tree_row_reference_get_path (context->reference);
    gtk_tree_model_get_iter (tree_model, &iter, path);
    gtk_tree_model_row_changed (tree_model, path, &iter);
    gtk_tree_path_free (path);

exit:
    async_context_free (context);
}

static void
subscription_editor_subscribe (EMSubscriptionEditor *editor)
{
    CamelFolderInfo *folder_info;
    GtkTreeRowReference *reference;
    GtkTreeSelection *selection;
    GtkTreeModel *tree_model;
    GtkTreeView *tree_view;
    GtkTreePath *path;
    GtkTreeIter iter;
    GdkCursor *cursor;
    GdkWindow *window;
    AsyncContext *context;
    gboolean have_selection;

    tree_view = editor->priv->active->tree_view;
    selection = gtk_tree_view_get_selection (tree_view);

    have_selection = gtk_tree_selection_get_selected (
        selection, &tree_model, &iter);
    g_return_if_fail (have_selection);

    /* Cancel any operation on this store still in progress. */
    gtk_button_clicked (GTK_BUTTON (editor->priv->stop_button));

    /* Start a new 'subscription' operation. */
    editor->priv->active->cancellable = g_cancellable_new ();

    gtk_widget_set_sensitive (editor->priv->notebook, FALSE);
    gtk_widget_set_sensitive (editor->priv->subscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->unsubscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->refresh_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->stop_button, TRUE);

    cursor = gdk_cursor_new (GDK_WATCH);
    window = gtk_widget_get_window (GTK_WIDGET (editor));
    gdk_window_set_cursor (window, cursor);
    gdk_cursor_unref (cursor);

    gtk_tree_model_get (
        tree_model, &iter, COL_FOLDER_INFO, &folder_info, -1);

    path = gtk_tree_model_get_path (tree_model, &iter);
    reference = gtk_tree_row_reference_new (tree_model, path);
    gtk_tree_path_free (path);

    context = g_slice_new0 (AsyncContext);
    context->editor = g_object_ref (editor);
    context->folder_info = folder_info;
    context->reference = reference;

    camel_store_subscribe_folder (
        editor->priv->active->store,
        folder_info->full_name, G_PRIORITY_DEFAULT,
        editor->priv->active->cancellable, (GAsyncReadyCallback)
        subscription_editor_subscribe_folder_done, context);
}

static void
subscription_editor_unsubscribe (EMSubscriptionEditor *editor)
{
    CamelFolderInfo *folder_info;
    GtkTreeRowReference *reference;
    GtkTreeSelection *selection;
    GtkTreeModel *tree_model;
    GtkTreeView *tree_view;
    GtkTreePath *path;
    GtkTreeIter iter;
    GdkCursor *cursor;
    GdkWindow *window;
    AsyncContext *context;
    gboolean have_selection;

    tree_view = editor->priv->active->tree_view;
    selection = gtk_tree_view_get_selection (tree_view);

    have_selection = gtk_tree_selection_get_selected (
        selection, &tree_model, &iter);
    g_return_if_fail (have_selection);

    /* Cancel any operation on this store still in progress. */
    gtk_button_clicked (GTK_BUTTON (editor->priv->stop_button));

    /* Start a new 'unsubscription' operation. */
    editor->priv->active->cancellable = g_cancellable_new ();

    gtk_widget_set_sensitive (editor->priv->notebook, FALSE);
    gtk_widget_set_sensitive (editor->priv->subscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->unsubscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->refresh_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->stop_button, TRUE);

    cursor = gdk_cursor_new (GDK_WATCH);
    window = gtk_widget_get_window (GTK_WIDGET (editor));
    gdk_window_set_cursor (window, cursor);
    gdk_cursor_unref (cursor);

    gtk_tree_model_get (
        tree_model, &iter, COL_FOLDER_INFO, &folder_info, -1);

    path = gtk_tree_model_get_path (tree_model, &iter);
    reference = gtk_tree_row_reference_new (tree_model, path);
    gtk_tree_path_free (path);

    context = g_slice_new0 (AsyncContext);
    context->editor = g_object_ref (editor);
    context->folder_info = folder_info;
    context->reference = reference;

    camel_store_unsubscribe_folder (
        editor->priv->active->store,
        folder_info->full_name, G_PRIORITY_DEFAULT,
        editor->priv->active->cancellable, (GAsyncReadyCallback)
        subscription_editor_unsubscribe_folder_done, context);
}

static void
subscription_editor_collapse_all (EMSubscriptionEditor *editor)
{
    gtk_tree_view_collapse_all (editor->priv->active->tree_view);
}

static void
subscription_editor_expand_all (EMSubscriptionEditor *editor)
{
    gtk_tree_view_expand_all (editor->priv->active->tree_view);
}

static void
subscription_editor_refresh (EMSubscriptionEditor *editor)
{
    GdkCursor *cursor;
    GdkWindow *window;

    /* Cancel any operation on this store still in progress. */
    gtk_button_clicked (GTK_BUTTON (editor->priv->stop_button));

    /* Start a new 'refresh' operation. */
    editor->priv->active->cancellable = g_cancellable_new ();

    gtk_widget_set_sensitive (editor->priv->notebook, FALSE);
    gtk_widget_set_sensitive (editor->priv->subscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->unsubscribe_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->refresh_button, FALSE);
    gtk_widget_set_sensitive (editor->priv->stop_button, TRUE);

    cursor = gdk_cursor_new (GDK_WATCH);
    window = gtk_widget_get_window (GTK_WIDGET (editor));
    gdk_window_set_cursor (window, cursor);
    gdk_cursor_unref (cursor);

    camel_store_get_folder_info (
        editor->priv->active->store, NULL,
        CAMEL_STORE_FOLDER_INFO_RECURSIVE |
        CAMEL_STORE_FOLDER_INFO_NO_VIRTUAL |
        CAMEL_STORE_FOLDER_INFO_SUBSCRIPTION_LIST,
        G_PRIORITY_DEFAULT, editor->priv->active->cancellable,
        (GAsyncReadyCallback) subscription_editor_get_folder_info_done,
        g_object_ref (editor));
}

static void
subscription_editor_stop (EMSubscriptionEditor *editor)
{
    GdkWindow *window;

    if (editor->priv->active->cancellable != NULL) {
        g_cancellable_cancel (editor->priv->active->cancellable);
        g_object_unref (editor->priv->active->cancellable);
        editor->priv->active->cancellable = NULL;
    }

    gtk_widget_set_sensitive (editor->priv->notebook, TRUE);
    gtk_widget_set_sensitive (editor->priv->subscribe_button, TRUE);
    gtk_widget_set_sensitive (editor->priv->unsubscribe_button, TRUE);
    gtk_widget_set_sensitive (editor->priv->refresh_button, TRUE);
    gtk_widget_set_sensitive (editor->priv->stop_button, FALSE);

    window = gtk_widget_get_window (GTK_WIDGET (editor));
    gdk_window_set_cursor (window, NULL);
}

static gboolean
subscription_editor_filter_cb (GtkTreeModel *tree_model,
                               GtkTreeIter *iter,
                               EMSubscriptionEditor *editor)
{
    CamelFolderInfo *folder_info;
    gchar *casefolded;
    gboolean match;

    /* If there's no search string let everything through. */
    if (editor->priv->search_string == NULL)
        return TRUE;

    gtk_tree_model_get (
        tree_model, iter,
        COL_CASEFOLDED, &casefolded,
        COL_FOLDER_INFO, &folder_info, -1);

    match = FOLDER_CAN_SELECT (folder_info) &&
        (casefolded != NULL) && (*casefolded != '\0') &&
        (strstr (casefolded, editor->priv->search_string) != NULL);

    g_free (casefolded);

    return match;
}

static void
subscription_editor_update_view (EMSubscriptionEditor *editor)
{
    GtkEntry *entry;
    GtkTreeView *tree_view;
    GtkTreeModel *tree_model;
    const gchar *text;

    entry = GTK_ENTRY (editor->priv->entry);
    tree_view = editor->priv->active->tree_view;

    editor->priv->timeout_id = 0;

    text = gtk_entry_get_text (entry);

    if (text != NULL && *text != '\0') {
        g_free (editor->priv->search_string);
        editor->priv->search_string = g_utf8_casefold (text, -1);

        /* Install the list store in the tree view if needed. */
        if (!editor->priv->active->filtered_view) {
            GtkTreeSelection *selection;
            GtkTreePath *path;

            tree_model = gtk_tree_model_filter_new (
                editor->priv->active->list_store, NULL);
            gtk_tree_model_filter_set_visible_func (
                GTK_TREE_MODEL_FILTER (tree_model),
                (GtkTreeModelFilterVisibleFunc)
                subscription_editor_filter_cb, editor,
                (GDestroyNotify) NULL);
            gtk_tree_view_set_model (tree_view, tree_model);
            g_object_unref (tree_model);

            path = gtk_tree_path_new_first ();
            selection = gtk_tree_view_get_selection (tree_view);
            gtk_tree_selection_select_path (selection, path);
            gtk_tree_path_free (path);

            editor->priv->active->filtered_view = TRUE;
        }

        tree_model = gtk_tree_view_get_model (tree_view);
        gtk_tree_model_filter_refilter (
            GTK_TREE_MODEL_FILTER (tree_model));

        gtk_entry_set_icon_sensitive (
            entry, GTK_ENTRY_ICON_SECONDARY, TRUE);

        gtk_widget_set_sensitive (
            editor->priv->collapse_all_button, FALSE);
        gtk_widget_set_sensitive (
            editor->priv->expand_all_button, FALSE);

    } else {
        /* Install the tree store in the tree view if needed. */
        if (editor->priv->active->filtered_view) {
            GtkTreeSelection *selection;
            GtkTreePath *path;

            tree_model = editor->priv->active->tree_store;
            gtk_tree_view_set_model (tree_view, tree_model);

            path = gtk_tree_path_new_first ();
            selection = gtk_tree_view_get_selection (tree_view);
            gtk_tree_selection_select_path (selection, path);
            gtk_tree_path_free (path);

            editor->priv->active->filtered_view = FALSE;
        }

        gtk_entry_set_icon_sensitive (
            entry, GTK_ENTRY_ICON_SECONDARY, FALSE);

        gtk_widget_set_sensitive (
            editor->priv->collapse_all_button, TRUE);
        gtk_widget_set_sensitive (
            editor->priv->expand_all_button, TRUE);
    }
}

static gboolean
subscription_editor_timeout_cb (EMSubscriptionEditor *editor)
{
    subscription_editor_update_view (editor);
    editor->priv->timeout_id = 0;

    return FALSE;
}

static void
subscription_editor_combo_box_changed_cb (GtkComboBox *combo_box,
                                          EMSubscriptionEditor *editor)
{
    StoreData *data;
    gint index;

    index = gtk_combo_box_get_active (combo_box);
    g_return_if_fail (index < editor->priv->stores->len);

    data = g_ptr_array_index (editor->priv->stores, index);
    g_return_if_fail (data != NULL);

    editor->priv->active = data;

    subscription_editor_stop (editor);
    subscription_editor_update_view (editor);

    g_object_notify (G_OBJECT (editor), "account");

    if (data->needs_refresh) {
        subscription_editor_refresh (editor);
        data->needs_refresh = FALSE;
    }
}

static void
subscription_editor_entry_changed_cb (GtkEntry *entry,
                                      EMSubscriptionEditor *editor)
{
    const gchar *text;

    if (editor->priv->timeout_id > 0) {
        g_source_remove (editor->priv->timeout_id);
        editor->priv->timeout_id = 0;
    }

    text = gtk_entry_get_text (entry);

    if (text != NULL && *text != '\0')
        editor->priv->timeout_id = g_timeout_add_seconds (
            1, (GSourceFunc) subscription_editor_timeout_cb, editor);
    else
        subscription_editor_update_view (editor);
}

static void
subscription_editor_icon_release_cb (GtkEntry *entry,
                                     GtkEntryIconPosition icon_pos,
                                     GdkEvent *event,
                                     EMSubscriptionEditor *editor)
{
    if (icon_pos == GTK_ENTRY_ICON_SECONDARY)
        gtk_entry_set_text (entry, "");
}

static void
subscription_editor_renderer_toggled_cb (GtkCellRendererToggle *renderer,
                                         const gchar *path_string,
                                         EMSubscriptionEditor *editor)
{
    GtkTreeSelection *selection;
    GtkTreeView *tree_view;
    GtkTreePath *path;

    tree_view = editor->priv->active->tree_view;
    selection = gtk_tree_view_get_selection (tree_view);

    path = gtk_tree_path_new_from_string (path_string);
    gtk_tree_selection_select_path (selection, path);
    gtk_tree_path_free (path);

    if (gtk_cell_renderer_toggle_get_active (renderer))
        subscription_editor_unsubscribe (editor);
    else
        subscription_editor_subscribe (editor);
}

static void
subscription_editor_render_toggle_cb (GtkCellLayout *cell_layout,
                                      GtkCellRenderer *renderer,
                                      GtkTreeModel *tree_model,
                                      GtkTreeIter *iter)
{
    CamelFolderInfo *folder_info;

    gtk_tree_model_get (
        tree_model, iter, COL_FOLDER_INFO, &folder_info, -1);

    g_object_set (
        renderer, "active", FOLDER_SUBSCRIBED (folder_info),
        "visible", FOLDER_CAN_SELECT (folder_info), NULL);
}

static void
subscription_editor_selection_changed_cb (GtkTreeSelection *selection,
                                          EMSubscriptionEditor *editor)
{
    GtkTreeModel *tree_model;
    GtkTreeIter iter;

    if (gtk_tree_selection_get_selected (selection, &tree_model, &iter)) {
        CamelFolderInfo *folder_info;

        gtk_tree_model_get (
            tree_model, &iter,
            COL_FOLDER_INFO, &folder_info, -1);
        gtk_widget_set_sensitive (
            editor->priv->subscribe_button,
            FOLDER_CAN_SELECT (folder_info) &&
            !FOLDER_SUBSCRIBED (folder_info));
        gtk_widget_set_sensitive (
            editor->priv->unsubscribe_button,
            FOLDER_CAN_SELECT (folder_info) &&
            FOLDER_SUBSCRIBED (folder_info));
    } else {
        gtk_widget_set_sensitive (
            editor->priv->subscribe_button, FALSE);
        gtk_widget_set_sensitive (
            editor->priv->subscribe_button, FALSE);
    }
}

static void
subscription_editor_add_account (EMSubscriptionEditor *editor,
                                 EAccount *account)
{
    StoreData *data;
    CamelStore *store;
    CamelSession *session;
    GtkListStore *list_store;
    GtkTreeStore *tree_store;
    GtkTreeViewColumn *column;
    GtkTreeSelection *selection;
    GtkCellRenderer *renderer;
    GtkComboBoxText *combo_box;
    GtkWidget *container;
    GtkWidget *widget;
    const gchar *url;

    combo_box = GTK_COMBO_BOX_TEXT (editor->priv->combo_box);
    gtk_combo_box_text_append_text (combo_box, account->name);

    session = em_subscription_editor_get_session (editor);
    url = e_account_get_string (account, E_ACCOUNT_SOURCE_URL);

    store = (CamelStore *) camel_session_get_service (
        session, url, CAMEL_PROVIDER_STORE, NULL);

    tree_store = gtk_tree_store_new (
        N_COLUMNS,
        /* COL_CASEFOLDED */    G_TYPE_STRING,
        /* COL_FOLDER_ICON */   G_TYPE_STRING,
        /* COL_FOLDER_NAME */   G_TYPE_STRING,
        /* COL_FOLDER_INFO */   G_TYPE_POINTER);

    list_store = gtk_list_store_new (
        N_COLUMNS,
        /* COL_CASEFOLDED */    G_TYPE_STRING,
        /* COL_FOLDER_ICON */   G_TYPE_STRING,
        /* COL_FOLDER_NAME */   G_TYPE_STRING,
        /* COL_FOLDER_INFO */   G_TYPE_POINTER);

    container = editor->priv->notebook;

    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_notebook_append_page (GTK_NOTEBOOK (container), widget, NULL);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_tree_view_new_with_model (GTK_TREE_MODEL (tree_store));
    gtk_tree_view_set_enable_search (GTK_TREE_VIEW (widget), TRUE);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (widget), FALSE);
    gtk_tree_view_set_search_column (
        GTK_TREE_VIEW (widget), COL_FOLDER_NAME);
    gtk_container_add (GTK_CONTAINER (container), widget);
    gtk_widget_show (widget);

    column = gtk_tree_view_column_new ();
    gtk_tree_view_append_column (GTK_TREE_VIEW (widget), column);

    renderer = gtk_cell_renderer_toggle_new ();
    g_object_set (renderer, "activatable", TRUE, NULL);
    gtk_tree_view_column_pack_start (column, renderer, FALSE);

    gtk_cell_layout_set_cell_data_func (
        GTK_CELL_LAYOUT (column), renderer,
        (GtkCellLayoutDataFunc) subscription_editor_render_toggle_cb,
        NULL, (GDestroyNotify) NULL);

    g_signal_connect (
        renderer, "toggled",
        G_CALLBACK (subscription_editor_renderer_toggled_cb), editor);

    column = gtk_tree_view_column_new ();
    gtk_tree_view_append_column (GTK_TREE_VIEW (widget), column);
    gtk_tree_view_set_expander_column (GTK_TREE_VIEW (widget), column);

    renderer = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (column, renderer, FALSE);
    gtk_tree_view_column_add_attribute (
        column, renderer, "icon-name", COL_FOLDER_ICON);

    renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_column_pack_start (column, renderer, TRUE);
    gtk_tree_view_column_add_attribute (
        column, renderer, "text", COL_FOLDER_NAME);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));

    g_signal_connect (
        selection, "changed",
        G_CALLBACK (subscription_editor_selection_changed_cb), editor);

    data = g_slice_new0 (StoreData);
    data->account = g_object_ref (account);
    data->store = g_object_ref (store);
    data->tree_view = g_object_ref (widget);
    data->list_store = GTK_TREE_MODEL (list_store);
    data->tree_store = GTK_TREE_MODEL (tree_store);
    data->needs_refresh = TRUE;

    g_ptr_array_add (editor->priv->stores, data);
}

static gboolean
subscription_editor_test_account (EMSubscriptionEditor *editor,
                                  EAccount *account)
{
    CamelSession *session;
    CamelStore *store;
    const gchar *url;

    /* Account must be enabled. */
    if (!account->enabled)
        return FALSE;

    session = em_subscription_editor_get_session (editor);
    url = e_account_get_string (account, E_ACCOUNT_SOURCE_URL);

    store = (CamelStore *) camel_session_get_service (
        session, url, CAMEL_PROVIDER_STORE, NULL);

    /* Corresponding CamelStore must support subscriptions. */
    return (store != NULL) && camel_store_supports_subscriptions (store);
}

static void
subscription_editor_set_account (EMSubscriptionEditor *editor,
                                 EAccount *account)
{
    g_return_if_fail (editor->priv->initial_account == NULL);

    if (account == NULL)
        account = e_get_default_account ();

    if (E_IS_ACCOUNT (account))
        editor->priv->initial_account = g_object_ref (account);
}

static void
subscription_editor_set_session (EMSubscriptionEditor *editor,
                                 CamelSession *session)
{
    g_return_if_fail (CAMEL_IS_SESSION (session));
    g_return_if_fail (editor->priv->session == NULL);

    editor->priv->session = g_object_ref (session);
}

static void
subscription_editor_set_property (GObject *object,
                                  guint property_id,
                                  const GValue *value,
                                  GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT:
            subscription_editor_set_account (
                EM_SUBSCRIPTION_EDITOR (object),
                g_value_get_object (value));
            return;

        case PROP_SESSION:
            subscription_editor_set_session (
                EM_SUBSCRIPTION_EDITOR (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
subscription_editor_get_property (GObject *object,
                                  guint property_id,
                                  GValue *value,
                                  GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT:
            g_value_set_object (
                value,
                em_subscription_editor_get_account (
                EM_SUBSCRIPTION_EDITOR (object)));
            return;

        case PROP_SESSION:
            g_value_set_object (
                value,
                em_subscription_editor_get_session (
                EM_SUBSCRIPTION_EDITOR (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
subscription_editor_dispose (GObject *object)
{
    EMSubscriptionEditorPrivate *priv;

    priv = EM_SUBSCRIPTION_EDITOR_GET_PRIVATE (object);

    if (priv->session != NULL) {
        g_object_unref (priv->session);
        priv->session = NULL;
    }

    if (priv->initial_account != NULL) {
        g_object_unref (priv->initial_account);
        priv->initial_account = NULL;
    }

    if (priv->timeout_id > 0) {
        g_source_remove (priv->timeout_id);
        priv->timeout_id = 0;
    }

    g_ptr_array_set_size (priv->stores, 0);

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (em_subscription_editor_parent_class)->dispose (object);
}

static void
subscription_editor_finalize (GObject *object)
{
    EMSubscriptionEditorPrivate *priv;

    priv = EM_SUBSCRIPTION_EDITOR_GET_PRIVATE (object);

    g_ptr_array_free (priv->stores, TRUE);

    g_free (priv->search_string);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (em_subscription_editor_parent_class)->finalize (object);
}

static void
subscription_editor_realize (GtkWidget *widget)
{
    EMSubscriptionEditor *editor;
    GtkComboBox *combo_box;
    CamelSession *session;
    GList *list, *iter;
    gint initial_index = 0;

    editor = EM_SUBSCRIPTION_EDITOR (widget);
    session = em_subscription_editor_get_session (editor);

    /* Chain up to parent's realize() method. */
    GTK_WIDGET_CLASS (em_subscription_editor_parent_class)->realize (widget);

    /* Find accounts to display, and watch for the default account. */
    list = e_get_subscribable_accounts (session);
    for (iter = list; iter != NULL; iter = g_list_next (iter)) {
        EAccount *account = E_ACCOUNT (iter->data);
        if (account == editor->priv->initial_account)
            initial_index = editor->priv->stores->len;
        subscription_editor_add_account (editor, account);
    }
    g_list_free (list);

    /* The subscription editor should only be accessible if
     * at least one enabled account supports subscriptions. */
    g_return_if_fail (editor->priv->stores->len > 0);

    combo_box = GTK_COMBO_BOX (editor->priv->combo_box);
    gtk_combo_box_set_active (combo_box, initial_index);
}

static void
em_subscription_editor_class_init (EMSubscriptionEditorClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    g_type_class_add_private (class, sizeof (EMSubscriptionEditorPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = subscription_editor_set_property;
    object_class->get_property = subscription_editor_get_property;
    object_class->dispose = subscription_editor_dispose;
    object_class->finalize = subscription_editor_finalize;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->realize = subscription_editor_realize;

    g_object_class_install_property (
        object_class,
        PROP_ACCOUNT,
        g_param_spec_object (
            "account",
            NULL,
            NULL,
            E_TYPE_ACCOUNT,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));

    g_object_class_install_property (
        object_class,
        PROP_SESSION,
        g_param_spec_object (
            "session",
            NULL,
            NULL,
            CAMEL_TYPE_SESSION,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));
}

static void
em_subscription_editor_init (EMSubscriptionEditor *editor)
{
    GtkWidget *container;
    GtkWidget *widget;
    GtkWidget *box;
    const gchar *tooltip;

    editor->priv = EM_SUBSCRIPTION_EDITOR_GET_PRIVATE (editor);
    editor->priv->stores = g_ptr_array_new_with_free_func (
        (GDestroyNotify) store_data_free);

    gtk_container_set_border_width (GTK_CONTAINER (editor), 5);
    gtk_window_set_title (GTK_WINDOW (editor), _("Folder Subscriptions"));

    gconf_bridge_bind_window_size (
        gconf_bridge_get (),
        "/apps/evolution/mail/subscription_editor",
        GTK_WINDOW (editor));

    gtk_dialog_add_button (
        GTK_DIALOG (editor),
        GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE);

    container = gtk_dialog_get_content_area (GTK_DIALOG (editor));

    widget = gtk_vbox_new (FALSE, 12);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 5);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = box = widget;

    widget = gtk_table_new (2, 3, FALSE);
    gtk_table_set_col_spacings (GTK_TABLE (widget), 6);
    gtk_table_set_row_spacings (GTK_TABLE (widget), 6);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_combo_box_text_new ();
    gtk_table_attach (
        GTK_TABLE (container), widget,
        1, 2, 0, 1, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
    editor->priv->combo_box = widget;
    gtk_widget_show (widget);

    g_signal_connect (
        widget, "changed",
        G_CALLBACK (subscription_editor_combo_box_changed_cb), editor);

    widget = gtk_label_new_with_mnemonic (_("_Account:"));
    gtk_label_set_mnemonic_widget (
        GTK_LABEL (widget), editor->priv->combo_box);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_table_attach (
        GTK_TABLE (container), widget,
        0, 1, 0, 1, GTK_FILL, GTK_FILL, 0, 0);
    gtk_widget_show (widget);

    widget = gtk_entry_new ();
    gtk_entry_set_icon_from_stock (
        GTK_ENTRY (widget),
        GTK_ENTRY_ICON_SECONDARY, GTK_STOCK_CLEAR);
    gtk_entry_set_icon_tooltip_text (
        GTK_ENTRY (widget),
        GTK_ENTRY_ICON_SECONDARY, _("Clear Search"));
    gtk_entry_set_icon_sensitive (
        GTK_ENTRY (widget),
        GTK_ENTRY_ICON_SECONDARY, FALSE);
    gtk_table_attach (
        GTK_TABLE (container), widget,
        1, 2, 1, 2, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
    editor->priv->entry = widget;
    gtk_widget_show (widget);

    g_signal_connect (
        widget, "changed",
        G_CALLBACK (subscription_editor_entry_changed_cb), editor);

    g_signal_connect (
        widget, "icon-release",
        G_CALLBACK (subscription_editor_icon_release_cb), editor);

    widget = gtk_label_new_with_mnemonic (_("Sho_w items that contain:"));
    gtk_label_set_mnemonic_widget (
        GTK_LABEL (widget), editor->priv->entry);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_table_attach (
        GTK_TABLE (container), widget,
        0, 1, 1, 2, GTK_FILL, GTK_FILL, 0, 0);
    gtk_widget_show (widget);

    container = box;

    widget = gtk_hbox_new (FALSE, 6);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_notebook_new ();
    gtk_notebook_set_show_tabs (GTK_NOTEBOOK (widget), FALSE);
    gtk_notebook_set_show_border (GTK_NOTEBOOK (widget), FALSE);
    gtk_container_add (GTK_CONTAINER (container), widget);
    editor->priv->notebook = widget;
    gtk_widget_show (widget);

    g_object_bind_property (
        editor->priv->combo_box, "active",
        editor->priv->notebook, "page",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    widget = gtk_vbutton_box_new ();
    gtk_box_set_spacing (GTK_BOX (widget), 6);
    gtk_button_box_set_layout (
        GTK_BUTTON_BOX (widget), GTK_BUTTONBOX_START);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    tooltip = _("Subscribe to the selected folder");
    widget = gtk_button_new_with_mnemonic (_("Su_bscribe"));
    gtk_widget_set_sensitive (widget, FALSE);
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    editor->priv->subscribe_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_subscribe), editor);

    tooltip = _("Unsubscribe from the selected folder");
    widget = gtk_button_new_with_mnemonic (_("_Unsubscribe"));
    gtk_widget_set_sensitive (widget, FALSE);
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    editor->priv->unsubscribe_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_unsubscribe), editor);

    tooltip = _("Collapse all folders");
    widget = gtk_button_new_with_mnemonic (_("C_ollapse All"));
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    editor->priv->collapse_all_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_collapse_all), editor);

    tooltip = _("Expand all folders");
    widget = gtk_button_new_with_mnemonic (_("E_xpand All"));
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    editor->priv->expand_all_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_expand_all), editor);

    tooltip = _("Refresh the folder list");
    widget = gtk_button_new_from_stock (GTK_STOCK_REFRESH);
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_set_sensitive (widget, FALSE);
    editor->priv->refresh_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_refresh), editor);

    tooltip = _("Stop the current operation");
    widget = gtk_button_new_from_stock (GTK_STOCK_STOP);
    gtk_widget_set_tooltip_text (widget, tooltip);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_set_sensitive (widget, FALSE);
    editor->priv->stop_button = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (subscription_editor_stop), editor);
}

GtkWidget *
em_subscription_editor_new (GtkWindow *parent,
                            CamelSession *session,
                            EAccount *account)
{
    g_return_val_if_fail (GTK_IS_WINDOW (parent), NULL);
    g_return_val_if_fail (CAMEL_IS_SESSION (session), NULL);

    return g_object_new (
        EM_TYPE_SUBSCRIPTION_EDITOR,
        "account", account,
        "session", session,
        "transient-for", parent,
        NULL);
}

EAccount *
em_subscription_editor_get_account (EMSubscriptionEditor *editor)
{
    g_return_val_if_fail (EM_IS_SUBSCRIPTION_EDITOR (editor), NULL);

    if (editor->priv->active == NULL)
        return NULL;

    return editor->priv->active->account;
}

CamelSession *
em_subscription_editor_get_session (EMSubscriptionEditor *editor)
{
    g_return_val_if_fail (EM_IS_SUBSCRIPTION_EDITOR (editor), NULL);

    return editor->priv->session;
}