path: root/widgets/table/e-table-search.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-table-search.c
 * Copyright 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>
#include <gtk/gtksignal.h>
#include "e-table-search.h"
#include "gal/util/e-util.h"

#include <string.h>

#define ETS_CLASS(e) ((ETableSearchClass *)((GtkObject *)e)->klass)

#define PARENT_TYPE gtk_object_get_type ()

#define d(x)

d(static gint depth = 0);

struct _ETableSearchPrivate {
    guint timeout_id;

    char *search_string;
    gunichar last_character;
};

static GtkObjectClass *e_table_search_parent_class;

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, char *string, ETableSearchFlags flags)
{
    gboolean ret_val;
    g_return_val_if_fail (e_table_search != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_SEARCH (e_table_search), FALSE);
    
    gtk_signal_emit (GTK_OBJECT (e_table_search),
             e_table_search_signals [SEARCH_SEARCH], string, flags, &ret_val);

    return ret_val;
}

static void
e_table_search_accept (ETableSearch *e_table_search)
{
    g_return_if_fail (e_table_search != NULL);
    g_return_if_fail (E_IS_TABLE_SEARCH (e_table_search));
    
    gtk_signal_emit (GTK_OBJECT (e_table_search),
             e_table_search_signals [SEARCH_ACCEPT]);
}

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 (1000, ets_accept, ets);
}

static void
e_table_search_destroy (GtkObject *object)
{
    ETableSearch *ets = (ETableSearch *) object;
    
    /* FIXME: do we need to unregister the timeout? bad things
           might happen if a timeout is still active. */
    g_free (ets->priv->search_string);
    g_free (ets->priv);
    
    if (e_table_search_parent_class->destroy)
        (*e_table_search_parent_class->destroy)(object);
}

static void
e_table_search_class_init (GtkObjectClass *object_class)
{
    ETableSearchClass *klass = E_TABLE_SEARCH_CLASS(object_class);
    e_table_search_parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = e_table_search_destroy;

    e_table_search_signals [SEARCH_SEARCH] =
        gtk_signal_new ("search",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableSearchClass, search),
                e_marshal_BOOL__STRING_ENUM,
                GTK_TYPE_BOOL, 2, GTK_TYPE_STRING, GTK_TYPE_ENUM);

    e_table_search_signals [SEARCH_ACCEPT] =
        gtk_signal_new ("accept",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableSearchClass, accept),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    E_OBJECT_CLASS_ADD_SIGNALS (object_class, e_table_search_signals, LAST_SIGNAL);

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

static void
e_table_search_init (ETableSearch *ets)
{
    ets->priv = g_new (ETableSearchPrivate, 1);

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


guint
e_table_search_get_type (void)
{
    static guint type = 0;
    
    if (!type)
    {
        GtkTypeInfo info =
        {
            "ETableSearch",
            sizeof (ETableSearch),
            sizeof (ETableSearchClass),
            (GtkClassInitFunc) e_table_search_class_init,
            (GtkObjectInitFunc) e_table_search_init,
            /* reserved_1 */ NULL,
            /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };
        
        type = gtk_type_unique (PARENT_TYPE, &info);
    }

  return type;
}

ETableSearch *
e_table_search_new (void)
{
    ETableSearch *ets = gtk_type_new (e_table_search_get_type());

    return ets;
}

/**
 * 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)
{
    char character_utf8[7];
    char *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)
{
    char *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;
}