path: root/widgets/e-table/e-table-sort-info.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-table-sort-info.c: a Table Model
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * (C) 1999 Helix Code, Inc.
 */
#include <config.h>
#include <gtk/gtksignal.h>
#include "e-table-sort-info.h"
#include "e-util/e-util.h"

#define ETM_CLASS(e) ((ETableSortInfoClass *)((GtkObject *)e)->klass)

#define PARENT_TYPE gtk_object_get_type ()
                      

static GtkObjectClass *e_table_sort_info_parent_class;

enum {
    SORT_INFO_CHANGED,
    GROUP_INFO_CHANGED,
    LAST_SIGNAL
};

static guint e_table_sort_info_signals [LAST_SIGNAL] = { 0, };

static void
etsi_destroy (GtkObject *object)
{
    ETableSortInfo *etsi;

    etsi = E_TABLE_SORT_INFO (object);
    
    if (etsi->groupings)
        g_free(etsi->groupings);
    if (etsi->sortings)
        g_free(etsi->sortings);
}

static void
e_table_sort_info_init (ETableSortInfo *info)
{
    info->group_count = 0;
    info->groupings = NULL;
    info->sort_count = 0;
    info->sortings = NULL;
    info->frozen = 0;
    info->sort_info_changed = 0;
    info->group_info_changed = 0;
}

static void
e_table_sort_info_class_init (ETableSortInfoClass *klass)
{
    GtkObjectClass *object_class;

    e_table_sort_info_parent_class = gtk_type_class (gtk_object_get_type ());

    object_class = GTK_OBJECT_CLASS(klass);
    
    object_class->destroy = etsi_destroy;

    e_table_sort_info_signals [SORT_INFO_CHANGED] =
        gtk_signal_new ("sort_info_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableSortInfoClass, sort_info_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    e_table_sort_info_signals [GROUP_INFO_CHANGED] =
        gtk_signal_new ("group_info_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableSortInfoClass, group_info_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    klass->sort_info_changed = NULL;
    klass->group_info_changed = NULL;

    gtk_object_class_add_signals (object_class, e_table_sort_info_signals, LAST_SIGNAL);
}

E_MAKE_TYPE(e_table_sort_info, "ETableSortInfo", ETableSortInfo,
        e_table_sort_info_class_init, e_table_sort_info_init, PARENT_TYPE);

static void
e_table_sort_info_sort_info_changed (ETableSortInfo *info)
{
    g_return_if_fail (info != NULL);
    g_return_if_fail (E_IS_TABLE_SORT_INFO (info));
    
    if (info->frozen) {
        info->sort_info_changed = 1;
    } else {
        gtk_signal_emit (GTK_OBJECT (info),
                 e_table_sort_info_signals [SORT_INFO_CHANGED]);
    }
}

static void
e_table_sort_info_group_info_changed (ETableSortInfo *info)
{
    g_return_if_fail (info != NULL);
    g_return_if_fail (E_IS_TABLE_SORT_INFO (info));
    
    if (info->frozen) {
        info->group_info_changed = 1;
    } else {
        gtk_signal_emit (GTK_OBJECT (info),
                 e_table_sort_info_signals [GROUP_INFO_CHANGED]);
    }
}

void 
e_table_sort_info_freeze             (ETableSortInfo *info)
{
    info->frozen = 1;
}

void
e_table_sort_info_thaw               (ETableSortInfo *info)
{
    info->frozen = 0;
    if (info->sort_info_changed) {
        info->sort_info_changed = 0;
        e_table_sort_info_sort_info_changed(info);
    }
    if (info->group_info_changed) {
        info->group_info_changed = 0;
        e_table_sort_info_group_info_changed(info);
    }
}


guint
e_table_sort_info_grouping_get_count (ETableSortInfo *info)
{
    return info->group_count;
}

static void
e_table_sort_info_grouping_real_truncate  (ETableSortInfo *info, int length)
{
    if (length < info->group_count) {
        info->group_count = length;
    }
    if (length > info->group_count) {
        info->groupings = g_realloc(info->groupings, length * sizeof(ETableSortColumn));
        info->group_count = length;
    }
}

void
e_table_sort_info_grouping_truncate  (ETableSortInfo *info, int length)
{
    e_table_sort_info_grouping_real_truncate(info, length);
    e_table_sort_info_group_info_changed(info);
}

ETableSortColumn
e_table_sort_info_grouping_get_nth   (ETableSortInfo *info, int n)
{
    if (n < info->group_count) {
        return info->groupings[n];
    } else {
        ETableSortColumn fake = {0, 0};
        return fake;
    }
}

void
e_table_sort_info_grouping_set_nth   (ETableSortInfo *info, int n, ETableSortColumn column)
{
    if (n >= info->group_count) {
        e_table_sort_info_grouping_real_truncate(info, n + 1);
    }
    info->groupings[n] = column;
    e_table_sort_info_group_info_changed(info);
}


guint
e_table_sort_info_sorting_get_count (ETableSortInfo *info)
{
    return info->sort_count;
}

static void
e_table_sort_info_sorting_real_truncate  (ETableSortInfo *info, int length)
{
    if (length < info->sort_count) {
        info->sort_count = length;
    }
    if (length > info->sort_count) {
        info->sortings = g_realloc(info->sortings, length * sizeof(ETableSortColumn));
        info->sort_count = length;
    }
}

void
e_table_sort_info_sorting_truncate  (ETableSortInfo *info, int length)
{
    e_table_sort_info_sorting_real_truncate  (info, length);
    e_table_sort_info_sort_info_changed(info);
}

ETableSortColumn
e_table_sort_info_sorting_get_nth   (ETableSortInfo *info, int n)
{
    if (n < info->sort_count) {
        return info->sortings[n];
    } else {
        ETableSortColumn fake = {0, 0};
        return fake;
    }
}

void
e_table_sort_info_sorting_set_nth   (ETableSortInfo *info, int n, ETableSortColumn column)
{
    if (n >= info->sort_count) {
        e_table_sort_info_sorting_real_truncate(info, n + 1);
    }
    info->sortings[n] = column;
    e_table_sort_info_sort_info_changed(info);
}


ETableSortInfo *
e_table_sort_info_new (void)
{
    return gtk_type_new (e_table_sort_info_get_type ());
}