path: root/calendar/gui/e-date-time-list.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/* EDateTimeList - list of calendar dates/times with GtkTreeModel interface.
 *
 * Copyright (C) 2003 Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 * Authors:  Hans Petter Jansson  <hpj@ximian.com>
 */

#include <string.h>
#include <gtk/gtktreemodel.h>
#include <gtk/gtksignal.h>
#include <gtk/gtktreednd.h>
#include <glib.h>
#include <e-util/e-time-utils.h>
#include "e-date-time-list.h"
#include <libecal/e-cal-time-util.h>
#include "calendar-config.h"

#define G_LIST(x)                        ((GList *) x)
#define E_DATE_TIME_LIST_IS_SORTED(list) (E_DATE_TIME_LIST (list)->sort_column_id != -2)
#define IS_VALID_ITER(dt_list, iter)     (iter!= NULL && iter->user_data != NULL && \
                                          dt_list->stamp == iter->stamp)

static GType column_types [E_DATE_TIME_LIST_NUM_COLUMNS];

static void         e_date_time_list_init            (EDateTimeList      *file_list);
static void         e_date_time_list_class_init      (EDateTimeListClass *class);
static void         e_date_time_list_tree_model_init (GtkTreeModelIface  *iface);
static void         e_date_time_list_finalize        (GObject            *object);
static guint        e_date_time_list_get_flags       (GtkTreeModel       *tree_model);
static gint         e_date_time_list_get_n_columns   (GtkTreeModel       *tree_model);
static GType        e_date_time_list_get_column_type (GtkTreeModel       *tree_model,
                              gint                index);
static gboolean     e_date_time_list_get_iter        (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter,
                              GtkTreePath        *path);
static GtkTreePath *e_date_time_list_get_path        (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter);
static void         e_date_time_list_get_value       (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter,
                              gint                column,
                              GValue             *value);
static gboolean     e_date_time_list_iter_next       (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter);
static gboolean     e_date_time_list_iter_children   (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter,
                              GtkTreeIter        *parent);
static gboolean     e_date_time_list_iter_has_child  (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter);
static gint         e_date_time_list_iter_n_children (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter);
static gboolean     e_date_time_list_iter_nth_child  (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter,
                              GtkTreeIter        *parent,
                              gint                n);
static gboolean     e_date_time_list_iter_parent     (GtkTreeModel       *tree_model,
                              GtkTreeIter        *iter,
                              GtkTreeIter        *child);

static GObjectClass *parent_class = NULL;

GtkType
e_date_time_list_get_type (void)
{
    static GType date_time_list_type = 0;

    if (!date_time_list_type) {
        static const GTypeInfo date_time_list_info =
        {
            sizeof (EDateTimeListClass),
            NULL,       /* base_init */
            NULL,       /* base_finalize */
            (GClassInitFunc) e_date_time_list_class_init,
            NULL,       /* class_finalize */
            NULL,       /* class_data */
            sizeof (EDateTimeList),
            0,
            (GInstanceInitFunc) e_date_time_list_init,
        };

        static const GInterfaceInfo tree_model_info =
        {
            (GInterfaceInitFunc) e_date_time_list_tree_model_init,
            NULL,
            NULL
        };

        column_types [E_DATE_TIME_LIST_COLUMN_DESCRIPTION] = G_TYPE_STRING;

        date_time_list_type = g_type_register_static (G_TYPE_OBJECT, "EDateTimeList",
                                  &date_time_list_info, 0);
        g_type_add_interface_static (date_time_list_type,
                         GTK_TYPE_TREE_MODEL,
                         &tree_model_info);
    }

    return date_time_list_type;
}

static void
e_date_time_list_class_init (EDateTimeListClass *class)
{
    GObjectClass *object_class;

    parent_class = g_type_class_peek_parent (class);
    object_class = (GObjectClass*) class;

    object_class->finalize = e_date_time_list_finalize;
}

static void
e_date_time_list_tree_model_init (GtkTreeModelIface *iface)
{
    iface->get_flags = e_date_time_list_get_flags;
    iface->get_n_columns = e_date_time_list_get_n_columns;
    iface->get_column_type = e_date_time_list_get_column_type;
    iface->get_iter = e_date_time_list_get_iter;
    iface->get_path = e_date_time_list_get_path;
    iface->get_value = e_date_time_list_get_value;
    iface->iter_next = e_date_time_list_iter_next;
    iface->iter_children = e_date_time_list_iter_children;
    iface->iter_has_child = e_date_time_list_iter_has_child;
    iface->iter_n_children = e_date_time_list_iter_n_children;
    iface->iter_nth_child = e_date_time_list_iter_nth_child;
    iface->iter_parent = e_date_time_list_iter_parent;
}

static void
e_date_time_list_init (EDateTimeList *date_time_list)
{
    date_time_list->stamp         = g_random_int ();
    date_time_list->columns_dirty = FALSE;
    date_time_list->list          = NULL;
}

EDateTimeList *
e_date_time_list_new (void)
{
    EDateTimeList *date_time_list;

    date_time_list = E_DATE_TIME_LIST (g_object_new (e_date_time_list_get_type (), NULL));

    return date_time_list;
}

static void
all_rows_deleted (EDateTimeList *date_time_list)
{
    GtkTreePath *path;
    gint         i;

    if (!date_time_list->list)
        return;

    path = gtk_tree_path_new ();
    i = g_list_length (date_time_list->list);
    gtk_tree_path_append_index (path, i);

    for ( ; i >= 0; i--) {
        gtk_tree_model_row_deleted (GTK_TREE_MODEL (date_time_list), path);
        gtk_tree_path_prev (path);
    }

    gtk_tree_path_free (path);
}

static void
row_deleted (EDateTimeList *date_time_list, gint n)
{
    GtkTreePath *path;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, n);
    gtk_tree_model_row_deleted (GTK_TREE_MODEL (date_time_list), path);
    gtk_tree_path_free (path);
}

static void
row_added (EDateTimeList *date_time_list, gint n)
{
    GtkTreePath *path;
    GtkTreeIter  iter;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, n);

    if (gtk_tree_model_get_iter (GTK_TREE_MODEL (date_time_list), &iter, path))
        gtk_tree_model_row_inserted (GTK_TREE_MODEL (date_time_list), path, &iter);

    gtk_tree_path_free (path);
}

static void
row_updated (EDateTimeList *date_time_list, gint n)
{
    GtkTreePath *path;
    GtkTreeIter  iter;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, n);

    if (gtk_tree_model_get_iter (GTK_TREE_MODEL (date_time_list), &iter, path))
        gtk_tree_model_row_changed (GTK_TREE_MODEL (date_time_list), path, &iter);

    gtk_tree_path_free (path);
}

static void
e_date_time_list_finalize (GObject *object)
{
    EDateTimeList *date_time_list = E_DATE_TIME_LIST (object);

    if (G_OBJECT_CLASS (parent_class)->finalize)
        (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}

/* Fulfill the GtkTreeModel requirements */
static guint
e_date_time_list_get_flags (GtkTreeModel *tree_model)
{
    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), 0);

    return GTK_TREE_MODEL_LIST_ONLY;
}

static gint
e_date_time_list_get_n_columns (GtkTreeModel *tree_model)
{
    EDateTimeList *date_time_list = (EDateTimeList *) tree_model;

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), 0);

    date_time_list->columns_dirty = TRUE;
    return E_DATE_TIME_LIST_NUM_COLUMNS;
}

static GType
e_date_time_list_get_column_type (GtkTreeModel *tree_model,
                  gint          index)
{
    EDateTimeList *date_time_list = (EDateTimeList *) tree_model;

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), G_TYPE_INVALID);
    g_return_val_if_fail (index < E_DATE_TIME_LIST_NUM_COLUMNS &&
                  index >= 0, G_TYPE_INVALID);

    date_time_list->columns_dirty = TRUE;
    return column_types [index];
}

const ECalComponentDateTime *
e_date_time_list_get_date_time (EDateTimeList *date_time_list, GtkTreeIter *iter)
{
    g_return_val_if_fail (IS_VALID_ITER (date_time_list, iter), NULL);

    return G_LIST (iter->user_data)->data;
}

static void
free_datetime (ECalComponentDateTime *datetime)
{
    g_free (datetime->value);
    if (datetime->tzid)
        g_free ((gchar *) datetime->tzid);
    g_free (datetime);
}

static ECalComponentDateTime *
copy_datetime (const ECalComponentDateTime *datetime)
{
    ECalComponentDateTime *datetime_copy;

    datetime_copy = g_new0 (ECalComponentDateTime, 1);
    datetime_copy->value  = g_new (struct icaltimetype, 1);
    *datetime_copy->value = *datetime->value;

    if (datetime->tzid)
        datetime_copy->tzid = g_strdup (datetime->tzid);

    return datetime_copy;
}

static gint
compare_datetime (const ECalComponentDateTime *datetime1, const ECalComponentDateTime *datetime2)
{
    return icaltime_compare (*datetime1->value, *datetime2->value);
}

void
e_date_time_list_set_date_time (EDateTimeList *date_time_list, GtkTreeIter *iter,
                const ECalComponentDateTime *datetime)
{
    ECalComponentDateTime *datetime_old;

    g_return_if_fail (IS_VALID_ITER (date_time_list, iter));

    datetime_old = G_LIST (iter->user_data)->data;
    free_datetime (datetime_old);
    G_LIST (iter->user_data)->data = copy_datetime (datetime);
    row_updated (date_time_list, g_list_position (date_time_list->list, G_LIST (iter->user_data)));
}

void
e_date_time_list_append (EDateTimeList *date_time_list, GtkTreeIter *iter,
             const ECalComponentDateTime *datetime)
{
    g_return_if_fail (datetime != NULL);

    if (g_list_find_custom (date_time_list->list, datetime, (GCompareFunc)compare_datetime) == NULL) {
        date_time_list->list = g_list_append (date_time_list->list, copy_datetime (datetime));
        row_added (date_time_list, g_list_length (date_time_list->list) - 1);
    }

    if (iter) {
        iter->user_data = g_list_last (date_time_list->list);
        iter->stamp     = date_time_list->stamp;
    }
}

void
e_date_time_list_remove (EDateTimeList *date_time_list, GtkTreeIter *iter)
{
    gint n;

    g_return_if_fail (IS_VALID_ITER (date_time_list, iter));

    n = g_list_position (date_time_list->list, G_LIST (iter->user_data));
    free_datetime ((ECalComponentDateTime *) G_LIST (iter->user_data)->data);
    date_time_list->list = g_list_delete_link (date_time_list->list, G_LIST (iter->user_data));
    row_deleted (date_time_list, n);
}

void
e_date_time_list_clear (EDateTimeList *date_time_list)
{
    GList *l;

    all_rows_deleted (date_time_list);

    for (l = date_time_list->list; l; l = g_list_next (l)) {
        free_datetime ((ECalComponentDateTime *) l->data);
    }

    g_list_free (date_time_list->list);
    date_time_list->list = NULL;
}

static gboolean
e_date_time_list_get_iter (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreePath *path)
{
    EDateTimeList *date_time_list = (EDateTimeList *) tree_model;
    GList         *l;
    gint           i;

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), FALSE);
    g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);

    if (!date_time_list->list)
        return FALSE;

    date_time_list->columns_dirty = TRUE;

    i = gtk_tree_path_get_indices (path)[0];
    l = g_list_nth (date_time_list->list, i);
    if (!l)
        return FALSE;

    iter->user_data = l;
    iter->stamp     = date_time_list->stamp;
    return TRUE;
}

static GtkTreePath *
e_date_time_list_get_path (GtkTreeModel *tree_model,
               GtkTreeIter  *iter)
{
    EDateTimeList *date_time_list = (EDateTimeList *) tree_model;
    GtkTreePath   *retval;
    GList         *l;

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), NULL);
    g_return_val_if_fail (iter->stamp == E_DATE_TIME_LIST (tree_model)->stamp, NULL);

    l = iter->user_data;
    retval = gtk_tree_path_new ();
    gtk_tree_path_append_index (retval, g_list_position (date_time_list->list, l));
    return retval;
}

/* Builds a static string out of an exception date */
static char *
get_exception_string (ECalComponentDateTime *dt)
{
    static char buf [256];
    struct tm tmp_tm;

    tmp_tm.tm_year  = dt->value->year - 1900;
    tmp_tm.tm_mon   = dt->value->month - 1;
    tmp_tm.tm_mday  = dt->value->day;
    tmp_tm.tm_hour  = dt->value->hour;
    tmp_tm.tm_min   = dt->value->minute;
    tmp_tm.tm_sec   = dt->value->second;
    tmp_tm.tm_isdst = -1;

    tmp_tm.tm_wday = time_day_of_week (dt->value->day,
                       dt->value->month - 1,
                       dt->value->year);

    e_time_format_date_and_time (&tmp_tm, calendar_config_get_24_hour_format (),
                     FALSE, FALSE, buf, sizeof (buf));

    return buf;
}

static void
e_date_time_list_get_value (GtkTreeModel *tree_model,
                GtkTreeIter  *iter,
                gint          column,
                GValue       *value)
{
    EDateTimeList        *date_time_list = E_DATE_TIME_LIST (tree_model);
    ECalComponentDateTime *datetime;
    GList                *l;
    const gchar          *str;

    g_return_if_fail (E_IS_DATE_TIME_LIST (tree_model));
    g_return_if_fail (column < E_DATE_TIME_LIST_NUM_COLUMNS);
    g_return_if_fail (E_DATE_TIME_LIST (tree_model)->stamp == iter->stamp);
    g_return_if_fail (IS_VALID_ITER (date_time_list, iter));

    g_value_init (value, column_types [column]);

    if (!date_time_list->list)
        return;

    l        = iter->user_data;
    datetime = l->data;

    if (!datetime)
        return;

    switch (column) {
        case E_DATE_TIME_LIST_COLUMN_DESCRIPTION:
            str = get_exception_string (datetime);
            g_value_set_string (value, str);
            break;
    }
}

static gboolean
e_date_time_list_iter_next (GtkTreeModel  *tree_model,
                GtkTreeIter   *iter)
{
    GList *l;

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), FALSE);
    g_return_val_if_fail (IS_VALID_ITER (E_DATE_TIME_LIST (tree_model), iter), FALSE);

    if (!E_DATE_TIME_LIST (tree_model)->list)
        return FALSE;

    l = iter->user_data;
    l = g_list_next (l);
    if (l) {
        iter->user_data = l;
        return TRUE;
    }

    return FALSE;
}

static gboolean
e_date_time_list_iter_children (GtkTreeModel *tree_model,
                GtkTreeIter  *iter,
                GtkTreeIter  *parent)
{
    EDateTimeList *date_time_list = E_DATE_TIME_LIST (tree_model);

    /* this is a list, nodes have no children */
    if (parent)
        return FALSE;

    /* but if parent == NULL we return the list itself as children of the
     * "root" */

    if (!date_time_list->list)
        return FALSE;

    iter->stamp     = E_DATE_TIME_LIST (tree_model)->stamp;
    iter->user_data = date_time_list->list;
    return TRUE;
}

static gboolean
e_date_time_list_iter_has_child (GtkTreeModel *tree_model,
                 GtkTreeIter  *iter)
{
    g_return_val_if_fail (IS_VALID_ITER (E_DATE_TIME_LIST (tree_model), iter), FALSE);
    return FALSE;
}

static gint
e_date_time_list_iter_n_children (GtkTreeModel *tree_model,
                  GtkTreeIter  *iter)
{
    EDateTimeList *date_time_list = E_DATE_TIME_LIST (tree_model);

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), -1);
    g_return_val_if_fail (IS_VALID_ITER (date_time_list, iter), -1);

    if (iter == NULL)
        return g_list_length (date_time_list->list);

    g_return_val_if_fail (E_DATE_TIME_LIST (tree_model)->stamp == iter->stamp, -1);
    return 0;
}

static gboolean
e_date_time_list_iter_nth_child (GtkTreeModel *tree_model,
                 GtkTreeIter  *iter,
                 GtkTreeIter  *parent,
                 gint          n)
{
    EDateTimeList *date_time_list = E_DATE_TIME_LIST (tree_model);

    g_return_val_if_fail (E_IS_DATE_TIME_LIST (tree_model), FALSE);

    if (parent)
        return FALSE;

    if (date_time_list->list) {
        GList *l;

        l = g_list_nth (date_time_list->list, n);
        if (!l)
            return FALSE;

        iter->stamp     = date_time_list->stamp;
        iter->user_data = l;
        return TRUE;
    }

    return FALSE;
}

static gboolean
e_date_time_list_iter_parent (GtkTreeModel *tree_model,
                  GtkTreeIter  *iter,
                  GtkTreeIter  *child)
{
    return FALSE;
}