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/*
 * e-file-activity.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-file-activity.h"

#include <stdarg.h>

#define E_FILE_ACTIVITY_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_FILE_ACTIVITY, EFileActivityPrivate))

struct _EFileActivityPrivate {
    GCancellable *cancellable;
    GAsyncResult *result;
    GFile *file;

    gulong handler_id;
};

enum {
    PROP_0,
    PROP_CANCELLABLE,
    PROP_FILE,
    PROP_RESULT
};

static gpointer parent_class;

static void
file_activity_set_property (GObject *object,
                            guint property_id,
                            const GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CANCELLABLE:
            e_file_activity_set_cancellable (
                E_FILE_ACTIVITY (object),
                g_value_get_object (value));
            return;

        case PROP_FILE:
            e_file_activity_set_file (
                E_FILE_ACTIVITY (object),
                g_value_get_object (value));
            return;

        case PROP_RESULT:
            e_file_activity_set_result (
                E_FILE_ACTIVITY (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
file_activity_get_property (GObject *object,
                            guint property_id,
                            GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CANCELLABLE:
            g_value_set_object (
                value, e_file_activity_get_cancellable (
                E_FILE_ACTIVITY (object)));
            return;

        case PROP_FILE:
            g_value_set_object (
                value, e_file_activity_get_file (
                E_FILE_ACTIVITY (object)));
            return;

        case PROP_RESULT:
            g_value_set_object (
                value, e_file_activity_get_result (
                E_FILE_ACTIVITY (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
file_activity_dispose (GObject *object)
{
    EFileActivityPrivate *priv;

    priv = E_FILE_ACTIVITY_GET_PRIVATE (object);

    if (priv->cancellable != NULL) {
        g_signal_handler_disconnect (
            priv->cancellable, priv->handler_id);
        g_object_unref (priv->cancellable);
        priv->cancellable = NULL;
    }

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

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

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

static void
file_activity_cancelled (EActivity *activity)
{
    EFileActivity *file_activity;
    GCancellable *cancellable;

    file_activity = E_FILE_ACTIVITY (activity);
    cancellable = e_file_activity_get_cancellable (file_activity);
    g_cancellable_cancel (cancellable);

    /* Chain up to parent's cancelled() method. */
    E_ACTIVITY_CLASS (parent_class)->cancelled (activity);
}

static void
file_activity_class_init (EFileActivityClass *class)
{
    GObjectClass *object_class;
    EActivityClass *activity_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EFileActivityPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = file_activity_set_property;
    object_class->get_property = file_activity_get_property;
    object_class->dispose = file_activity_dispose;

    activity_class = E_ACTIVITY_CLASS (class);
    activity_class->cancelled = file_activity_cancelled;

    g_object_class_install_property (
        object_class,
        PROP_CANCELLABLE,
        g_param_spec_object (
            "cancellable",
            "Cancellable",
            NULL,
            G_TYPE_CANCELLABLE,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_FILE,
        g_param_spec_object (
            "file",
            "File",
            NULL,
            G_TYPE_FILE,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_RESULT,
        g_param_spec_object (
            "result",
            "Result",
            NULL,
            G_TYPE_ASYNC_RESULT,
            G_PARAM_READWRITE));
}

static void
file_activity_init (EFileActivity *file_activity)
{
    GCancellable *cancellable;

    file_activity->priv = E_FILE_ACTIVITY_GET_PRIVATE (file_activity);

    e_activity_set_allow_cancel (E_ACTIVITY (file_activity), TRUE);

    cancellable = g_cancellable_new ();
    e_file_activity_set_cancellable (file_activity, cancellable);
    g_object_unref (cancellable);
}

GType
e_file_activity_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EFileActivityClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) file_activity_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EFileActivity),
            0,     /* n_preallocs */
            (GInstanceInitFunc) file_activity_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            E_TYPE_ACTIVITY, "EFileActivity", &type_info, 0);
    }

    return type;
}

EActivity *
e_file_activity_new (const gchar *primary_text)
{
    return g_object_new (
        E_TYPE_FILE_ACTIVITY,
        "primary-text", primary_text, NULL);
}

EActivity *
e_file_activity_newv (const gchar *format, ...)
{
    EActivity *activity;
    gchar *primary_text;
    va_list args;

    va_start (args, format);
    primary_text = g_strdup_vprintf (format, args);
    activity = e_file_activity_new (primary_text);
    g_free (primary_text);
    va_end (args);

    return activity;
}

GCancellable *
e_file_activity_get_cancellable (EFileActivity *file_activity)
{
    g_return_val_if_fail (E_IS_FILE_ACTIVITY (file_activity), NULL);

    return file_activity->priv->cancellable;
}

void
e_file_activity_set_cancellable (EFileActivity *file_activity,
                                 GCancellable *cancellable)
{
    g_return_if_fail (E_IS_FILE_ACTIVITY (file_activity));

    if (cancellable != NULL) {
        g_return_if_fail (G_IS_CANCELLABLE (cancellable));
        g_object_ref (cancellable);
    }

    if (file_activity->priv->cancellable != NULL) {
        g_signal_handler_disconnect (
            file_activity->priv->cancellable,
            file_activity->priv->handler_id);
        g_object_unref (file_activity->priv->cancellable);
        file_activity->priv->handler_id = 0;
    }

    file_activity->priv->cancellable = cancellable;

    if (cancellable != NULL)
        file_activity->priv->handler_id =
            g_signal_connect_swapped (
                cancellable, "cancelled",
                G_CALLBACK (e_activity_cancel),
                file_activity);

    g_object_notify (G_OBJECT (file_activity), "cancellable");
}

GFile *
e_file_activity_get_file (EFileActivity *file_activity)
{
    g_return_val_if_fail (E_IS_FILE_ACTIVITY (file_activity), NULL);

    return file_activity->priv->file;
}

void
e_file_activity_set_file (EFileActivity *file_activity,
                          GFile *file)
{
    g_return_if_fail (E_IS_FILE_ACTIVITY (file_activity));

    if (file != NULL) {
        g_return_if_fail (G_IS_FILE (file));
        g_object_ref (file);
    }

    if (file_activity->priv->file != NULL)
        g_object_unref (file_activity->priv->file);

    file_activity->priv->file = file;

    g_object_notify (G_OBJECT (file_activity), "file");
}

GAsyncResult *
e_file_activity_get_result (EFileActivity *file_activity)
{
    g_return_val_if_fail (E_IS_FILE_ACTIVITY (file_activity), NULL);

    return file_activity->priv->result;
}

void
e_file_activity_set_result (EFileActivity *file_activity,
                            GAsyncResult *result)
{
    g_return_if_fail (E_IS_FILE_ACTIVITY (file_activity));

    if (result != NULL) {
        g_return_if_fail (G_IS_ASYNC_RESULT (result));
        g_object_ref (result);
    }

    if (file_activity->priv->result != NULL)
        g_object_unref (file_activity->priv->result);

    file_activity->priv->result = result;

    g_object_notify (G_OBJECT (file_activity), "result");
}

void
e_file_activity_progress (goffset current_num_bytes,
                          goffset total_num_bytes,
                          gpointer activity)
{
    gdouble percent = -1.0;

    g_return_if_fail (E_IS_ACTIVITY (activity));

    if (current_num_bytes > 0 && total_num_bytes > 0)
        percent = (gdouble) current_num_bytes / total_num_bytes;

    e_activity_set_percent (activity, percent);
}