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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-util/e-account-utils.h>

#include "em-folder-tree.h"
#include "em-folder-selector.h"
#include "em-utils.h"

#include "em-folder-selection-button.h"

#define EM_FOLDER_SELECTION_BUTTON_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_FOLDER_SELECTION_BUTTON, EMFolderSelectionButtonPrivate))

struct _EMFolderSelectionButtonPrivate {
    EMailSession *session;
    GtkWidget *icon;
    GtkWidget *label;

    gchar *uri;  /* for single-select mode */
    GList *uris; /* for multi-select mode */

    gchar *title;
    gchar *caption;

    gboolean multiple_select;
};

enum {
    PROP_0,
    PROP_CAPTION,
    PROP_MULTISELECT,
    PROP_SESSION,
    PROP_TITLE
};

enum {
    SELECTED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (
    EMFolderSelectionButton,
    em_folder_selection_button,
    GTK_TYPE_BUTTON)

static void
folder_selection_button_unselected (EMFolderSelectionButton *button)
{
    const gchar *text;

    text = _("<click here to select a folder>");
    gtk_image_set_from_pixbuf (GTK_IMAGE (button->priv->icon), NULL);
    gtk_label_set_text (GTK_LABEL (button->priv->label), text);
}

static void
folder_selection_button_set_contents (EMFolderSelectionButton *button)
{
    EAccount *account;
    GtkLabel *label;
    const gchar *uri;
    gchar *folder_name;

    uri = button->priv->uri;
    label = GTK_LABEL (button->priv->label);
    folder_name = em_utils_folder_name_from_uri (uri);

    if (folder_name == NULL) {
        folder_selection_button_unselected (button);
        return;
    }

    account = e_get_account_by_source_url (uri);

    if (account != NULL) {
        gchar *tmp = folder_name;

        folder_name = g_strdup_printf (
            "%s/%s", e_account_get_string (
            account, E_ACCOUNT_NAME), _(folder_name));
        gtk_label_set_text (label, folder_name);
        g_free (tmp);
    } else
        gtk_label_set_text (label, _(folder_name));

    g_free (folder_name);
}

static void
folder_selection_button_set_property (GObject *object,
                                      guint property_id,
                                      const GValue *value,
                                      GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CAPTION:
            em_folder_selection_button_set_caption (
                EM_FOLDER_SELECTION_BUTTON (object),
                g_value_get_string (value));
            return;

        case PROP_MULTISELECT:
            em_folder_selection_button_set_multiselect (
                EM_FOLDER_SELECTION_BUTTON (object),
                g_value_get_boolean (value));
            return;

        case PROP_SESSION:
            em_folder_selection_button_set_session (
                EM_FOLDER_SELECTION_BUTTON (object),
                g_value_get_object (value));
            return;

        case PROP_TITLE:
            em_folder_selection_button_set_title (
                EM_FOLDER_SELECTION_BUTTON (object),
                g_value_get_string (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
folder_selection_button_get_property (GObject *object,
                                      guint property_id,
                                      GValue *value,
                                      GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CAPTION:
            g_value_set_string (
                value,
                em_folder_selection_button_get_caption (
                EM_FOLDER_SELECTION_BUTTON (object)));
            return;

        case PROP_MULTISELECT:
            g_value_set_boolean (
                value,
                em_folder_selection_button_get_multiselect (
                EM_FOLDER_SELECTION_BUTTON (object)));
            return;

        case PROP_SESSION:
            g_value_set_object (
                value,
                em_folder_selection_button_get_session (
                EM_FOLDER_SELECTION_BUTTON (object)));
            return;

        case PROP_TITLE:
            g_value_set_string (
                value,
                em_folder_selection_button_get_title (
                EM_FOLDER_SELECTION_BUTTON (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
folder_selection_button_dispose (GObject *object)
{
    EMFolderSelectionButtonPrivate *priv;

    priv = EM_FOLDER_SELECTION_BUTTON_GET_PRIVATE (object);

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

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

static void
folder_selection_button_finalize (GObject *object)
{
    EMFolderSelectionButtonPrivate *priv;

    priv = EM_FOLDER_SELECTION_BUTTON_GET_PRIVATE (object);

    g_list_foreach (priv->uris, (GFunc) g_free, NULL);
    g_list_free (priv->uris);

    g_free (priv->title);
    g_free (priv->caption);
    g_free (priv->uri);

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

static void
folder_selection_button_clicked (GtkButton *button)
{
    EMFolderSelectionButtonPrivate *priv;
    EMFolderTree *emft;
    GtkWidget *dialog;
    GtkTreeSelection *selection;
    GtkSelectionMode mode;
    gpointer parent;

    priv = EM_FOLDER_SELECTION_BUTTON_GET_PRIVATE (button);

    parent = gtk_widget_get_toplevel (GTK_WIDGET (button));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    emft = (EMFolderTree *) em_folder_tree_new (priv->session);
    emu_restore_folder_tree_state (emft);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (emft));
    if (priv->multiple_select)
        mode = GTK_SELECTION_MULTIPLE;
    else
        mode = GTK_SELECTION_SINGLE;
    gtk_tree_selection_set_mode (selection, mode);

    em_folder_tree_set_excluded (
        emft, EMFT_EXCLUDE_NOSELECT |
        EMFT_EXCLUDE_VIRTUAL | EMFT_EXCLUDE_VTRASH);

    dialog = em_folder_selector_new (
        parent, emft, EM_FOLDER_SELECTOR_CAN_CREATE,
        priv->title, priv->caption, NULL);

    if (priv->multiple_select)
        em_folder_selector_set_selected_list (
            EM_FOLDER_SELECTOR (dialog), priv->uris);
    else
        em_folder_selector_set_selected (
            EM_FOLDER_SELECTOR (dialog), priv->uri);

    if (gtk_dialog_run (GTK_DIALOG (dialog)) != GTK_RESPONSE_OK)
        goto exit;

    if (priv->multiple_select) {
        GList *uris;

        uris = em_folder_selector_get_selected_uris (
            EM_FOLDER_SELECTOR (dialog));
        em_folder_selection_button_set_selection_mult (
            EM_FOLDER_SELECTION_BUTTON (button), uris);
    } else {
        const gchar *uri;

        uri = em_folder_selector_get_selected_uri (
            EM_FOLDER_SELECTOR (dialog));
        em_folder_selection_button_set_selection (
            EM_FOLDER_SELECTION_BUTTON (button), uri);
    }

    g_signal_emit (button, signals[SELECTED], 0);

exit:
    gtk_widget_destroy (dialog);
}

static void
em_folder_selection_button_class_init (EMFolderSelectionButtonClass *class)
{
    GObjectClass *object_class;
    GtkButtonClass *button_class;

    g_type_class_add_private (class, sizeof (EMFolderSelectionButtonPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = folder_selection_button_set_property;
    object_class->get_property = folder_selection_button_get_property;
    object_class->dispose = folder_selection_button_dispose;
    object_class->finalize = folder_selection_button_finalize;

    button_class = GTK_BUTTON_CLASS (class);
    button_class->clicked = folder_selection_button_clicked;

    g_object_class_install_property (
        object_class,
        PROP_CAPTION,
        g_param_spec_string (
            "caption",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_MULTISELECT,
        g_param_spec_boolean (
            "multiselect",
            NULL,
            NULL,
            FALSE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_SESSION,
        g_param_spec_object (
            "session",
            NULL,
            NULL,
            E_TYPE_MAIL_SESSION,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_TITLE,
        g_param_spec_string (
            "title",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    signals[SELECTED] = g_signal_new (
        "selected",
        G_OBJECT_CLASS_TYPE (object_class),
        G_SIGNAL_RUN_FIRST,
        G_STRUCT_OFFSET (EMFolderSelectionButtonClass, selected),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);
}

static void
em_folder_selection_button_init (EMFolderSelectionButton *emfsb)
{
    GtkWidget *box;

    emfsb->priv = EM_FOLDER_SELECTION_BUTTON_GET_PRIVATE (emfsb);

    emfsb->priv->multiple_select = FALSE;

    box = gtk_hbox_new (FALSE, 4);

    emfsb->priv->icon = gtk_image_new ();
    gtk_widget_show (emfsb->priv->icon);
    gtk_box_pack_start (GTK_BOX (box), emfsb->priv->icon, FALSE, TRUE, 0);

    emfsb->priv->label = gtk_label_new ("");
    gtk_widget_show (emfsb->priv->label);
    gtk_label_set_justify (GTK_LABEL (emfsb->priv->label), GTK_JUSTIFY_LEFT);
    gtk_misc_set_alignment (GTK_MISC (emfsb->priv->label), 0.0, 0.0);
    gtk_box_pack_start (GTK_BOX (box), emfsb->priv->label, TRUE, TRUE, 0);

    gtk_widget_show (box);
    gtk_container_add (GTK_CONTAINER (emfsb), box);

    folder_selection_button_set_contents (emfsb);
}

GtkWidget *
em_folder_selection_button_new (EMailSession *session,
                                const gchar *title,
                                const gchar *caption)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);

    return g_object_new (
        EM_TYPE_FOLDER_SELECTION_BUTTON,
        "session", session, "title", title,
        "caption", caption, NULL);
}

const gchar *
em_folder_selection_button_get_caption (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button), NULL);

    return button->priv->caption;
}

void
em_folder_selection_button_set_caption (EMFolderSelectionButton *button,
                                        const gchar *caption)
{
    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    g_free (button->priv->caption);
    button->priv->caption = g_strdup (caption);

    g_object_notify (G_OBJECT (button), "caption");
}

gboolean
em_folder_selection_button_get_multiselect (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button), FALSE);

    return button->priv->multiple_select;
}

void
em_folder_selection_button_set_multiselect (EMFolderSelectionButton *button,
                                            gboolean multiselect)
{
    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    button->priv->multiple_select = multiselect;

    g_object_notify (G_OBJECT (button), "multiselect");
}

const gchar *
em_folder_selection_button_get_selection (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button), NULL);

    return button->priv->uri;
}

void
em_folder_selection_button_set_selection (EMFolderSelectionButton *button,
                                          const gchar *uri)
{
    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    if (g_strcmp0 (button->priv->uri, uri) == 0)
        return;

    g_free (button->priv->uri);
    button->priv->uri = g_strdup (uri);

    folder_selection_button_set_contents (button);
}

GList *
em_folder_selection_button_get_selection_mult (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button), NULL);

    return button->priv->uris;
}

void
em_folder_selection_button_set_selection_mult (EMFolderSelectionButton *button,
                                               GList *uris)
{
    gchar *caption, *tmp, *tmp2;

    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    g_list_foreach (button->priv->uris, (GFunc) g_free, NULL);
    g_list_free (button->priv->uris);

    button->priv->uris = uris;

    /* compile the name */
    caption = g_strdup ("");

    while (uris) {
        tmp = em_utils_folder_name_from_uri (uris->data);
        if (tmp) {
            tmp2 = g_strconcat (caption, ", ", tmp, NULL);
            g_free (caption);
            caption = tmp2;
            g_free (tmp);
            uris = uris->next;
        } else {
            /* apparently, we do not know this folder, so we'll just skip it */
            g_free (uris->data);
            uris = g_list_next (uris);
            button->priv->uris = g_list_remove (
                button->priv->uris, uris->data);
        }
    }

    if (caption[0])
        gtk_label_set_text (
            GTK_LABEL (button->priv->label), caption + 2);
    else
        folder_selection_button_unselected (button);

    g_free (caption);
}

EMailSession *
em_folder_selection_button_get_session (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button), NULL);

    return button->priv->session;
}

void
em_folder_selection_button_set_session (EMFolderSelectionButton *button,
                                        EMailSession *session)
{
    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    if (session != NULL) {
        g_return_if_fail (E_IS_MAIL_SESSION (session));
        g_object_ref (session);
    }

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

    button->priv->session = session;

    g_object_notify (G_OBJECT (button), "session");
}

const gchar *
em_folder_selection_button_get_title (EMFolderSelectionButton *button)
{
    g_return_val_if_fail (EM_FOLDER_SELECTION_BUTTON (button), NULL);

    return button->priv->title;
}

void
em_folder_selection_button_set_title (EMFolderSelectionButton *button,
                                      const gchar *title)
{
    g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));

    g_free (button->priv->title);
    button->priv->title = g_strdup (title);

    g_object_notify (G_OBJECT (button), "title");
}