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/*
 *
 * 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/>
 *
 *
 * Authors:
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <glib/gi18n.h>
#include <e-util/e-util.h>

#include "e-mail-session.h"
#include "em-folder-tree.h"
#include "em-folder-selector.h"
#include "em-folder-utils.h"
#include "em-utils.h"

#define d(x)

#define EM_FOLDER_SELECTOR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_FOLDER_SELECTOR, EMFolderSelectorPrivate))

struct _EMFolderSelectorPrivate {
    EMailBackend *backend;
    EMFolderTree *folder_tree;  /* not referenced */
    EMFolderTreeModel *model;
};

enum {
    PROP_0,
    PROP_BACKEND,
    PROP_MODEL
};

/* XXX EMFolderSelector is an EAlertSink, but it just uses the default
 *     message dialog implementation.  We should do something nicer. */

G_DEFINE_TYPE_WITH_CODE (
    EMFolderSelector,
    em_folder_selector,
    GTK_TYPE_DIALOG,
    G_IMPLEMENT_INTERFACE (E_TYPE_ALERT_SINK, NULL))

static void
folder_selector_set_backend (EMFolderSelector *emfs,
                             EMailBackend *backend)
{
    g_return_if_fail (E_IS_MAIL_BACKEND (backend));
    g_return_if_fail (emfs->priv->backend == NULL);

    emfs->priv->backend = g_object_ref (backend);
}

static void
folder_selector_set_model (EMFolderSelector *emfs,
                           EMFolderTreeModel *model)
{
    g_return_if_fail (EM_IS_FOLDER_TREE_MODEL (model));
    g_return_if_fail (emfs->priv->model == NULL);

    emfs->priv->model = g_object_ref (model);
}

static void
folder_selector_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            folder_selector_set_backend (
                EM_FOLDER_SELECTOR (object),
                g_value_get_object (value));
            return;

        case PROP_MODEL:
            folder_selector_set_model (
                EM_FOLDER_SELECTOR (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
folder_selector_get_property (GObject *object,
                              guint property_id,
                              GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            g_value_set_object (
                value,
                em_folder_selector_get_backend (
                EM_FOLDER_SELECTOR (object)));
            return;

        case PROP_MODEL:
            g_value_set_object (
                value,
                em_folder_selector_get_model (
                EM_FOLDER_SELECTOR (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
folder_selector_dispose (GObject *object)
{
    EMFolderSelector *emfs = EM_FOLDER_SELECTOR (object);

    if (emfs->created_id != 0) {
        g_signal_handler_disconnect (
            emfs->priv->model, emfs->created_id);
        emfs->created_id = 0;
    }

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

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

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

static void
folder_selector_finalize (GObject *object)
{
    EMFolderSelector *emfs = EM_FOLDER_SELECTOR (object);

    g_free (emfs->selected_uri);
    g_free (emfs->created_uri);

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

static void
em_folder_selector_class_init (EMFolderSelectorClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (EMFolderSelectorPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = folder_selector_set_property;
    object_class->get_property = folder_selector_get_property;
    object_class->dispose = folder_selector_dispose;
    object_class->finalize = folder_selector_finalize;

    g_object_class_install_property (
        object_class,
        PROP_BACKEND,
        g_param_spec_object (
            "backend",
            NULL,
            NULL,
            E_TYPE_MAIL_BACKEND,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_MODEL,
        g_param_spec_object (
            "model",
            NULL,
            NULL,
            EM_TYPE_FOLDER_TREE_MODEL,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));
}

static void
em_folder_selector_init (EMFolderSelector *emfs)
{
    emfs->priv = EM_FOLDER_SELECTOR_GET_PRIVATE (emfs);
}

static void
emfs_response (GtkWidget *dialog, gint response, EMFolderSelector *emfs)
{
    EMFolderTree *folder_tree;
    EMailBackend *backend;

    if (response != EM_FOLDER_SELECTOR_RESPONSE_NEW)
        return;

    folder_tree = em_folder_selector_get_folder_tree (emfs);

    g_object_set_data (
        G_OBJECT (folder_tree), "select", GUINT_TO_POINTER (1));

    backend = em_folder_tree_get_backend (folder_tree);

    em_folder_utils_create_folder (
        GTK_WINDOW (dialog), backend, folder_tree, NULL);

    g_signal_stop_emission_by_name (emfs, "response");
}

static void
emfs_create_name_changed (GtkEntry *entry, EMFolderSelector *emfs)
{
    EMFolderTree *folder_tree;
    gchar *path;
    const gchar *text = NULL;
    gboolean active;

    if (gtk_entry_get_text_length (emfs->name_entry) > 0)
        text = gtk_entry_get_text (emfs->name_entry);

    folder_tree = em_folder_selector_get_folder_tree (emfs);

    path = em_folder_tree_get_selected_uri (folder_tree);
    active = text && path && !strchr (text, '/');
    g_free (path);

    gtk_dialog_set_response_sensitive (
        GTK_DIALOG (emfs), GTK_RESPONSE_OK, active);
}

static void
folder_selected_cb (EMFolderTree *emft,
                    CamelStore *store,
                    const gchar *folder_name,
                    CamelFolderInfoFlags flags,
                    EMFolderSelector *emfs)
{
    if (emfs->name_entry)
        emfs_create_name_changed (emfs->name_entry, emfs);
    else
        gtk_dialog_set_response_sensitive (
            GTK_DIALOG (emfs), GTK_RESPONSE_OK, TRUE);
}

static void
folder_activated_cb (EMFolderTree *emft,
                     CamelStore *store,
                     const gchar *folder_name,
                     EMFolderSelector *emfs)
{
    gtk_dialog_response ((GtkDialog *) emfs, GTK_RESPONSE_OK);
}

static void
folder_selector_construct (EMFolderSelector *emfs,
                           guint32 flags,
                           const gchar *title,
                           const gchar *text,
                           const gchar *oklabel)
{
    EMailBackend *backend;
    EMFolderTreeModel *model;
    GtkWidget *content_area;
    GtkWidget *container;
    GtkWidget *widget;

    backend = em_folder_selector_get_backend (emfs);
    model = em_folder_selector_get_model (emfs);

    gtk_window_set_default_size (GTK_WINDOW (emfs), 350, 300);
    gtk_window_set_title (GTK_WINDOW (emfs), title);
    gtk_container_set_border_width (GTK_CONTAINER (emfs), 6);

    content_area = gtk_dialog_get_content_area (GTK_DIALOG (emfs));
    gtk_box_set_spacing (GTK_BOX (content_area), 6);
    gtk_container_set_border_width (GTK_CONTAINER (content_area), 6);

    container = content_area;

    emfs->flags = flags;
    if (flags & EM_FOLDER_SELECTOR_CAN_CREATE) {
        gtk_dialog_add_button (
            GTK_DIALOG (emfs), GTK_STOCK_NEW,
            EM_FOLDER_SELECTOR_RESPONSE_NEW);
        g_signal_connect (
            emfs, "response",
            G_CALLBACK (emfs_response), emfs);
    }

    gtk_dialog_add_buttons (
        GTK_DIALOG (emfs),
        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
        oklabel ? oklabel : GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);

    gtk_dialog_set_response_sensitive (
        GTK_DIALOG (emfs), GTK_RESPONSE_OK, FALSE);
    gtk_dialog_set_default_response (
        GTK_DIALOG (emfs), GTK_RESPONSE_OK);

    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_box_pack_end (GTK_BOX (container), widget, TRUE, TRUE, 6);
    gtk_widget_show (widget);

    container = widget;

    widget = em_folder_tree_new_with_model (
        backend, E_ALERT_SINK (emfs), model);
    emu_restore_folder_tree_state (EM_FOLDER_TREE (widget));
    gtk_container_add (GTK_CONTAINER (container), widget);
    emfs->priv->folder_tree = EM_FOLDER_TREE (widget);
    gtk_widget_show (widget);

    g_signal_connect (
        widget, "folder-selected",
        G_CALLBACK (folder_selected_cb), emfs);
    g_signal_connect (
        widget, "folder-activated",
        G_CALLBACK (folder_activated_cb), emfs);

    container = content_area;

    if (text != NULL) {
        widget = gtk_label_new (text);
        gtk_label_set_justify (GTK_LABEL (widget), GTK_JUSTIFY_LEFT);
        gtk_widget_show (widget);

        gtk_box_pack_end (GTK_BOX (container), widget, FALSE, TRUE, 6);
    }

    gtk_widget_grab_focus (GTK_WIDGET (emfs->priv->folder_tree));
}

GtkWidget *
em_folder_selector_new (GtkWindow *parent,
                        EMailBackend *backend,
                        EMFolderTreeModel *model,
                        guint32 flags,
                        const gchar *title,
                        const gchar *text,
                        const gchar *oklabel)
{
    EMFolderSelector *emfs;

    g_return_val_if_fail (E_IS_MAIL_BACKEND (backend), NULL);
    g_return_val_if_fail (EM_IS_FOLDER_TREE_MODEL (model), NULL);

    emfs = g_object_new (
        EM_TYPE_FOLDER_SELECTOR,
        "transient-for", parent,
        "backend", backend,
        "model", model, NULL);
    folder_selector_construct (emfs, flags, title, text, oklabel);

    return (GtkWidget *) emfs;
}

static void
emfs_create_name_activate (GtkEntry *entry, EMFolderSelector *emfs)
{
    if (gtk_entry_get_text_length (emfs->name_entry) > 0) {
        EMFolderTree *folder_tree;
        gchar *path;
        const gchar *text;

        text = gtk_entry_get_text (emfs->name_entry);

        folder_tree = em_folder_selector_get_folder_tree (emfs);
        path = em_folder_tree_get_selected_uri (folder_tree);

        if (text && path && !strchr (text, '/'))
            g_signal_emit_by_name (emfs, "response", GTK_RESPONSE_OK);
        g_free (path);
    }
}

GtkWidget *
em_folder_selector_create_new (GtkWindow *parent,
                               EMailBackend *backend,
                               EMFolderTreeModel *model,
                               guint32 flags,
                               const gchar *title,
                               const gchar *text)
{
    EMFolderSelector *emfs;
    EMFolderTree *folder_tree;
    GtkWidget *hbox, *w;
    GtkWidget *container;

    g_return_val_if_fail (E_IS_MAIL_BACKEND (backend), NULL);
    g_return_val_if_fail (EM_IS_FOLDER_TREE_MODEL (model), NULL);

    /* remove the CREATE flag if it is there since that's the
     * whole purpose of this dialog */
    flags &= ~EM_FOLDER_SELECTOR_CAN_CREATE;

    emfs = g_object_new (
        EM_TYPE_FOLDER_SELECTOR,
        "transient-for", parent,
        "backend", backend,
        "model", model, NULL);
    folder_selector_construct (emfs, flags, title, text, _("C_reate"));

    folder_tree = em_folder_selector_get_folder_tree (emfs);
    em_folder_tree_set_excluded (folder_tree, EMFT_EXCLUDE_NOINFERIORS);

    hbox = gtk_hbox_new (FALSE, 0);
    w = gtk_label_new_with_mnemonic (_("Folder _name:"));
    gtk_box_pack_start ((GtkBox *) hbox, w, FALSE, FALSE, 6);
    emfs->name_entry = (GtkEntry *) gtk_entry_new ();
    gtk_label_set_mnemonic_widget (
        GTK_LABEL (w), (GtkWidget *) emfs->name_entry);
    g_signal_connect (
        emfs->name_entry, "changed",
        G_CALLBACK (emfs_create_name_changed), emfs);
    g_signal_connect (
        emfs->name_entry, "activate",
        G_CALLBACK (emfs_create_name_activate), emfs);
    gtk_box_pack_start (
        (GtkBox *) hbox, (GtkWidget *) emfs->name_entry,
        TRUE, FALSE, 6);
    gtk_widget_show_all (hbox);

    container = gtk_dialog_get_content_area (GTK_DIALOG (emfs));
    gtk_box_pack_start (GTK_BOX (container), hbox, FALSE, TRUE, 0);

    gtk_widget_grab_focus ((GtkWidget *) emfs->name_entry);

    return (GtkWidget *) emfs;
}

EMailBackend *
em_folder_selector_get_backend (EMFolderSelector *emfs)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTOR (emfs), NULL);

    return emfs->priv->backend;
}

EMFolderTreeModel *
em_folder_selector_get_model (EMFolderSelector *emfs)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTOR (emfs), NULL);

    return emfs->priv->model;
}

EMFolderTree *
em_folder_selector_get_folder_tree (EMFolderSelector *emfs)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTOR (emfs), NULL);

    return emfs->priv->folder_tree;
}

const gchar *
em_folder_selector_get_selected_uri (EMFolderSelector *emfs)
{
    EMFolderTree *folder_tree;
    gchar *uri;

    g_return_val_if_fail (EM_IS_FOLDER_SELECTOR (emfs), NULL);

    folder_tree = em_folder_selector_get_folder_tree (emfs);
    uri = em_folder_tree_get_selected_uri (folder_tree);

    if (uri == NULL)
        return NULL;

    if (emfs->name_entry) {
        const gchar *name;
        gchar *temp_uri;

        name = gtk_entry_get_text (emfs->name_entry);
        temp_uri = g_strconcat (uri, "/", name, NULL);

        g_free (uri);
        uri = temp_uri;
    }

    g_free (emfs->selected_uri);
    emfs->selected_uri = uri;  /* takes ownership */

    return uri;
}