path: root/widgets/table/e-table-search.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/>
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <string.h>

#include "e-util/e-util.h"

#include "e-table-search.h"

#define d(x)

#define E_TABLE_SEARCH_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_TABLE_SEARCH, ETableSearchPrivate))

d (static gint depth = 0)

struct _ETableSearchPrivate {
    guint timeout_id;

    gchar *search_string;
    gunichar last_character;
};

G_DEFINE_TYPE (ETableSearch, e_table_search, G_TYPE_OBJECT)

enum {
    SEARCH_SEARCH,
    SEARCH_ACCEPT,
    LAST_SIGNAL
};

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

static gboolean
e_table_search_search (ETableSearch *e_table_search,
                       gchar *string,
                       ETableSearchFlags flags)
{
    gboolean ret_val;
    g_return_val_if_fail (E_IS_TABLE_SEARCH (e_table_search), FALSE);

    g_signal_emit (G_OBJECT (e_table_search),
               e_table_search_signals[SEARCH_SEARCH],
               0, string, flags, &ret_val);

    return ret_val;
}

static void
e_table_search_accept (ETableSearch *e_table_search)
{
    g_return_if_fail (E_IS_TABLE_SEARCH (e_table_search));

    g_signal_emit (G_OBJECT (e_table_search),
               e_table_search_signals[SEARCH_ACCEPT], 0);
}

static gboolean
ets_accept (gpointer data)
{
    ETableSearch *ets = data;
    e_table_search_accept (ets);
    g_free (ets->priv->search_string);

    ets->priv->timeout_id = 0;
    ets->priv->search_string = g_strdup ("");
    ets->priv->last_character = 0;

    return FALSE;
}

static void
drop_timeout (ETableSearch *ets)
{
    if (ets->priv->timeout_id) {
        g_source_remove (ets->priv->timeout_id);
    }
    ets->priv->timeout_id = 0;
}

static void
add_timeout (ETableSearch *ets)
{
    drop_timeout (ets);
    ets->priv->timeout_id = g_timeout_add_seconds (1, ets_accept, ets);
}

static void
e_table_search_finalize (GObject *object)
{
    ETableSearchPrivate *priv;

    priv = E_TABLE_SEARCH_GET_PRIVATE (object);

    drop_timeout (E_TABLE_SEARCH (object));

    g_free (priv->search_string);

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

static void
e_table_search_class_init (ETableSearchClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (ETableSearchPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = e_table_search_finalize;

    e_table_search_signals[SEARCH_SEARCH] =
        g_signal_new ("search",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (ETableSearchClass, search),
                  (GSignalAccumulator) NULL, NULL,
                  e_marshal_BOOLEAN__STRING_INT,
                  G_TYPE_BOOLEAN, 2, G_TYPE_STRING, G_TYPE_INT);

    e_table_search_signals[SEARCH_ACCEPT] =
        g_signal_new ("accept",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (ETableSearchClass, accept),
                  (GSignalAccumulator) NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);

    class->search = NULL;
    class->accept = NULL;
}

static void
e_table_search_init (ETableSearch *ets)
{
    ets->priv = E_TABLE_SEARCH_GET_PRIVATE (ets);

    ets->priv->search_string = g_strdup ("");
}

ETableSearch *
e_table_search_new (void)
{
    return g_object_new (E_TYPE_TABLE_SEARCH, NULL);
}

/**
 * e_table_search_column_count:
 * @e_table_search: The e-table-search to operate on
 *
 * Returns: the number of columns in the table search.
 */
void
e_table_search_input_character (ETableSearch *ets, gunichar character)
{
    gchar character_utf8[7];
    gchar *temp_string;

    g_return_if_fail (ets != NULL);
    g_return_if_fail (E_IS_TABLE_SEARCH (ets));

    character_utf8[g_unichar_to_utf8 (character, character_utf8)] = 0;

    temp_string = g_strdup_printf ("%s%s", ets->priv->search_string, character_utf8);
    if (e_table_search_search (ets, temp_string,
                   ets->priv->last_character != 0 ? E_TABLE_SEARCH_FLAGS_CHECK_CURSOR_FIRST : 0)) {
        g_free (ets->priv->search_string);
        ets->priv->search_string = temp_string;
        add_timeout (ets);
        ets->priv->last_character = character;
        return;
    } else {
        g_free (temp_string);
    }

    if (character == ets->priv->last_character) {
        if (ets->priv->search_string &&
            e_table_search_search (ets, ets->priv->search_string, 0)) {
            add_timeout (ets);
        }
    }
}

gboolean
e_table_search_backspace (ETableSearch *ets)
{
    gchar *end;

    g_return_val_if_fail (ets != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_SEARCH (ets), FALSE);

    if (!ets->priv->search_string ||
        !*ets->priv->search_string)
        return FALSE;

    end = ets->priv->search_string + strlen (ets->priv->search_string);
    end = g_utf8_prev_char (end);
    *end = 0;
    ets->priv->last_character = 0;
    add_timeout (ets);
    return TRUE;
}