path: root/widgets/misc/e-search-bar.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-search-bar.c
 *
 * Copyright (C) 2000, 2001 Ximian, Inc.
 *
 * Authors:
 *  Chris Lahey      <clahey@ximian.com>
 *  Ettore Perazzoli <ettore@ximian.com>
 *  Jon Trowbridge   <trow@ximian.com>

 *
 * This library 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 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/gtkdrawingarea.h>
#include <gtk/gtkeventbox.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtkmain.h>

#include <gal/widgets/e-unicode.h>
#include <gal/widgets/e-gui-utils.h>

#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>

#include <bonobo/bonobo-ui-util.h>

#include <stdlib.h>

#include "e-search-bar.h"


enum {
    QUERY_CHANGED,
    MENU_ACTIVATED,
    SEARCH_ACTIVATED,

    LAST_SIGNAL
};

static gint esb_signals [LAST_SIGNAL] = { 0, };

static GtkHBoxClass *parent_class = NULL;

/* The arguments we take */
enum {
    ARG_0,
    ARG_ITEM_ID,
    ARG_SUBITEM_ID,
    ARG_TEXT,
};


/* Forward decls.  */

static void emit_search_activated (ESearchBar *esb);


/* Utility functions.  */

static void
set_find_now_sensitive (ESearchBar *search_bar,
            gboolean sensitive)
{
    const char *text;

    text = gtk_entry_get_text (GTK_ENTRY (search_bar->entry));

    if (search_bar->ui_component != NULL)
        bonobo_ui_component_set_prop (search_bar->ui_component,
                          "/commands/ESearchBar:FindNow",
                          "sensitive", sensitive ? "1" : "0", NULL);

    gtk_widget_set_sensitive (search_bar->activate_button, sensitive);
}

static char *
verb_name_from_id (int id)
{
    return g_strdup_printf ("ESearchBar:Activate:%d", id);
}

/* This implements the "clear" action, i.e. clears the text and then emits
 * ::search_activated.  */

static void
clear_search (ESearchBar *esb)
{
    e_search_bar_set_text (esb, "");
    e_search_bar_set_item_id (esb, 0);
}

/* Frees an array of subitem information */
static void
free_subitems (ESearchBarSubitem *subitems)
{
    ESearchBarSubitem *s;

    g_assert (subitems != NULL);

    for (s = subitems; s->id != -1; s++) {
        if (s->text)
            g_free (s->text);
    }

    g_free (subitems);
}

static void
free_menu_items (ESearchBar *esb)
{
    GSList *p;

    if (esb->menu_items == NULL)
        return;

    for (p = esb->menu_items; p != NULL; p = p->next) {
        ESearchBarItem *item;

        item = (ESearchBarItem *) p->data;

        /* (No submitems for the menu_items, so no need to free that
           member.)  */

        g_free (item->text);
        g_free (item);
    }

    g_slist_free (esb->menu_items);
    esb->menu_items = NULL;
}


/* Signals.  */

static void
emit_query_changed (ESearchBar *esb)
{
    gtk_signal_emit (GTK_OBJECT (esb),
             esb_signals [QUERY_CHANGED]);
}

static void
emit_search_activated (ESearchBar *esb)
{
    if (esb->pending_activate) {
        gtk_idle_remove (esb->pending_activate);
        esb->pending_activate = 0;
    }

    gtk_signal_emit (GTK_OBJECT (esb), esb_signals [SEARCH_ACTIVATED]);

    set_find_now_sensitive (esb, FALSE);
}

static void
emit_menu_activated (ESearchBar *esb, int item)
{
    gtk_signal_emit (GTK_OBJECT (esb),
             esb_signals [MENU_ACTIVATED],
             item);
}


/* Callbacks -- Standard verbs.  */

static void
search_now_verb_cb (BonoboUIComponent *ui_component,
            void *data,
            const char *verb_name)
{
    ESearchBar *esb;

    esb = E_SEARCH_BAR (data);
    emit_query_changed (esb);
}

static void
clear_verb_cb (BonoboUIComponent *ui_component,
           void *data,
           const char *verb_name)
{
    ESearchBar *esb;

    esb = E_SEARCH_BAR (data);
    clear_search (esb);
}

static void
setup_standard_verbs (ESearchBar *search_bar)
{
    bonobo_ui_component_add_verb (search_bar->ui_component, "ESearchBar:Clear",
                      clear_verb_cb, search_bar);
    bonobo_ui_component_add_verb (search_bar->ui_component, "ESearchBar:FindNow",
                      search_now_verb_cb, search_bar);

    bonobo_ui_component_set (search_bar->ui_component, "/",
                 ("<commands>"
                  "  <cmd name=\"ESearchBar:Clear\"/>"
                  "  <cmd name=\"ESearchBar:FindNow\"/>"
                  "</commands>"),
                 NULL);

    /* Make sure the entries are created with the correct sensitivity.  */
    set_find_now_sensitive (search_bar, FALSE);
}

/* Callbacks -- The verbs for all the definable items.  */

static void
search_verb_cb (BonoboUIComponent *ui_component,
        void *data,
        const char *verb_name)
{
    ESearchBar *esb;
    const char *p;
    int id;

    esb = E_SEARCH_BAR (data);

    p = strrchr (verb_name, ':');
    g_assert (p != NULL);

    id = atoi (p + 1);
    emit_menu_activated (esb, id);
}

static void
entry_activated_cb (GtkWidget *widget,
             ESearchBar *esb)
{
    emit_search_activated (esb);
}

static void
entry_changed_cb (GtkWidget *widget,
          ESearchBar *esb)
{
    set_find_now_sensitive (esb, TRUE);
}

static void
subitem_activated_cb (GtkWidget *widget, ESearchBar *esb)
{
    gint id, subid;

    id = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (widget), "EsbItemId"));
    subid = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (widget), "EsbSubitemId"));

    esb->item_id = id;
    esb->subitem_id = subid;

    set_find_now_sensitive (esb, TRUE);
}

static char *
string_without_underscores (const char *s)
{
    char *new_string;
    const char *sp;
    char *dp;

    new_string = g_malloc (strlen (s) + 1);

    dp = new_string;
    for (sp = s; *sp != '\0'; sp ++) {
        if (*sp != '_') {
            *dp = *sp;
            dp ++;
        } else if (sp[1] == '_') {
            /* Translate "__" in "_".  */
            *dp = '_';
            dp ++;
            sp ++;
        }
    }
    *dp = 0;

    return new_string;
}

static void
activate_by_subitems (ESearchBar *esb, gint item_id, ESearchBarSubitem *subitems)
{
    if (subitems == NULL) {
        /* This item uses the entry. */

        /* Remove the menu */
        if (esb->suboption && esb->subitem_id != -1) {
            g_assert (esb->suboption->parent == esb->entry_box);
            g_assert (!esb->entry || esb->entry->parent == NULL);
            gtk_container_remove (GTK_CONTAINER (esb->entry_box), esb->suboption);
        }

        /* Create and add the entry */

        if (esb->entry == NULL) {
            esb->entry = gtk_entry_new();
            gtk_widget_set_usize (esb->entry, 4, -1);
            gtk_object_ref (GTK_OBJECT (esb->entry));
            gtk_signal_connect (GTK_OBJECT (esb->entry), "changed",
                        GTK_SIGNAL_FUNC (entry_changed_cb), esb);
            gtk_signal_connect (GTK_OBJECT (esb->entry), "activate",
                        GTK_SIGNAL_FUNC (entry_activated_cb), esb);
            gtk_container_add (GTK_CONTAINER (esb->entry_box), esb->entry);
            gtk_widget_show(esb->entry);

            esb->subitem_id = -1;
        }

        if (esb->subitem_id == -1) {
            g_assert (esb->entry->parent == esb->entry_box);
            g_assert (!esb->suboption || esb->suboption->parent == NULL);
        } else {
            gtk_container_add (GTK_CONTAINER (esb->entry_box), esb->entry);
            esb->subitem_id = -1;
        }
    } else {
        /* This item uses a submenu */
        GtkWidget *menu;
        GtkWidget *menu_item;
        gint i;

        /* Remove the entry */
        if (esb->entry && esb->subitem_id == -1) {
            g_assert (esb->entry->parent == esb->entry_box);
            g_assert (!esb->suboption || esb->suboption->parent == NULL);
            gtk_container_remove (GTK_CONTAINER (esb->entry_box), esb->entry);
        }

        /* Create and add the menu */

        if (esb->suboption == NULL) {
            esb->suboption = gtk_option_menu_new ();
            gtk_object_ref (GTK_OBJECT (esb->suboption));
            gtk_container_add (GTK_CONTAINER (esb->entry_box), esb->suboption);
            gtk_widget_show (esb->suboption);

            esb->subitem_id = subitems[0].id;
        }

        if (esb->subitem_id != -1) {
            g_assert (esb->suboption->parent == esb->entry_box);
            g_assert (!esb->entry || esb->entry->parent == NULL);
        } else {
            gtk_container_add (GTK_CONTAINER (esb->entry_box), esb->suboption);
            esb->subitem_id = subitems[0].id;
        }

        /* Create the items */

        esb->suboption_menu = menu = gtk_menu_new ();
        for (i = 0; subitems[i].id != -1; ++i) {
            if (subitems[i].text) {
                char *str;

                if (subitems[i].translate)
                    str = string_without_underscores (_(subitems[i].text));
                else
                    str = string_without_underscores (subitems[i].text);

                menu_item = gtk_menu_item_new_with_label (str);

                g_free (str);
            } else {
                menu_item = gtk_menu_item_new ();
                gtk_widget_set_sensitive (menu_item, FALSE);
            }

            gtk_object_set_data (GTK_OBJECT (menu_item), "EsbItemId",
                         GINT_TO_POINTER (item_id));
            gtk_object_set_data (GTK_OBJECT (menu_item), "EsbSubitemId",
                         GINT_TO_POINTER (subitems[i].id));

            gtk_signal_connect (GTK_OBJECT (menu_item),
                        "activate",
                        GTK_SIGNAL_FUNC (subitem_activated_cb),
                        esb);

            gtk_widget_show (menu_item);
            gtk_menu_append (GTK_MENU (menu), menu_item);
        }

        gtk_option_menu_remove_menu (GTK_OPTION_MENU (esb->suboption));
        gtk_option_menu_set_menu (GTK_OPTION_MENU (esb->suboption), menu);
    }

    if (esb->activate_button)
        gtk_widget_set_sensitive (esb->activate_button, subitems == NULL);
}

static void
option_activated_cb (GtkWidget *widget,
             ESearchBar *esb)
{
    int id;

    id = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (widget), "EsbChoiceId"));

    activate_by_subitems (esb, id, gtk_object_get_data (GTK_OBJECT (widget), "EsbChoiceSubitems"));

    esb->item_id = id;
    emit_query_changed (esb);
}

static void
activate_button_clicked_cb (GtkWidget *widget,
                ESearchBar *esb)
{
    emit_search_activated (esb);

    gtk_widget_grab_focus (esb->entry);
}

static void
clear_button_clicked_cb (GtkWidget *widget,
             ESearchBar *esb)
{
    clear_search (esb);

    gtk_widget_grab_focus (esb->entry);
}


/* Widgetry creation.  */

/* This function exists to fix the irreparable GtkOptionMenu stupidity.  In
   fact, this lame-ass widget adds a 1-pixel-wide empty border around the
   button for no reason.  So we have add a 1-pixel-wide border around the the
   buttons we have in the search bar to make things look right.  This is done
   through an event box.  */
static GtkWidget *
put_in_spacer_widget (GtkWidget *widget)
{
    GtkWidget *holder;

    holder = gtk_event_box_new ();
    gtk_container_set_border_width (GTK_CONTAINER (holder), 1);
    gtk_container_add (GTK_CONTAINER (holder), widget);

    return holder;
}

static ESearchBarSubitem *
copy_subitems (ESearchBarSubitem *subitems)
{
    gint i, N;
    ESearchBarSubitem *copy;

    if (subitems == NULL)
        return NULL;

    for (N=0; subitems[N].id != -1; ++N);
    copy = g_new (ESearchBarSubitem, N+1);

    for (i=0; i<N; ++i) {
        copy[i].text = g_strdup (subitems[i].text);
        copy[i].id = subitems[i].id;
        copy[i].translate = subitems[i].translate;
    }

    copy[N].text = NULL;
    copy[N].id = -1;

    return copy;
}

static void
append_xml_menu_item (GString *xml,
              const char *name,
              const char *label,
              const char *verb,
              const char *accelerator)
{
    char *encoded_label;

    encoded_label = bonobo_ui_util_encode_str (label);
    g_string_sprintfa (xml, "<menuitem name=\"%s\" verb=\"%s\" label=\"%s\"",
               name, verb, encoded_label);
    g_free (encoded_label);

    if (accelerator != NULL)
        g_string_sprintfa (xml, " accel=\"%s\"", accelerator);

    g_string_sprintfa (xml, "/>");
}

static void
setup_bonobo_menus (ESearchBar *esb)
{
    GString *xml;
    GSList *p;
    char *verb_name;
    char *encoded_title;

    xml = g_string_new ("");

    encoded_title = bonobo_ui_util_encode_str (_("_Search"));
    g_string_sprintfa (xml, "<submenu name=\"Search\" label=\"%s\">", encoded_title);
    g_free (encoded_title);

    g_string_sprintfa (xml, "<placeholder name=\"SearchBar\">");

    append_xml_menu_item (xml, "FindNow", _("_Find Now"), "ESearchBar:FindNow", NULL);
    append_xml_menu_item (xml, "Clear", _("_Clear"), "ESearchBar:Clear", "*Control**Shift*b");

    for (p = esb->menu_items; p != NULL; p = p->next) {
        const ESearchBarItem *item;

        item = (const ESearchBarItem *) p->data;

        verb_name = verb_name_from_id (item->id);
        bonobo_ui_component_add_verb (esb->ui_component, verb_name, search_verb_cb, esb);

        if (item->text == NULL)
            g_string_append (xml, "<separator/>");
        else
            append_xml_menu_item (xml, verb_name, item->text, verb_name, NULL);

        g_free (verb_name);
    }

    g_string_sprintfa (xml, "</placeholder>");
    g_string_sprintfa (xml, "</submenu>");

    bonobo_ui_component_set (esb->ui_component, "/menu/SearchPlaceholder", xml->str, NULL);

    g_string_free (xml, TRUE);
}

static void
remove_bonobo_menus (ESearchBar *esb)
{
    bonobo_ui_component_rm (esb->ui_component, "/menu/SearchPlaceholder/Search", NULL);
}

static void
update_bonobo_menus (ESearchBar *esb)
{
    setup_bonobo_menus (esb);
}

static void
set_menu (ESearchBar *esb,
      ESearchBarItem *items)
{
    int i;

    free_menu_items (esb);

    if (items == NULL)
        return;

    for (i = 0; items[i].id != -1; i++) {
        ESearchBarItem *new_item;

        g_assert (items[i].subitems == NULL);

        new_item = g_new (ESearchBarItem, 1);
        new_item->text     = g_strdup (items[i].text);
        new_item->id       = items[i].id;
        new_item->subitems = NULL;

        esb->menu_items = g_slist_append (esb->menu_items, new_item);
    }

    if (esb->ui_component != NULL)
        update_bonobo_menus (esb);
}

/* Callback used when an option item is destroyed.  We have to destroy its
 * suboption items.
 */
static void
option_item_destroy_cb (GtkObject *object, gpointer data)
{
    ESearchBarSubitem *subitems;

    subitems = data;

    g_assert (subitems != NULL);
    free_subitems (subitems);
    gtk_object_set_data (object, "EsbChoiceSubitems", NULL);
}

static void
set_option (ESearchBar *esb, ESearchBarItem *items)
{
    GtkWidget *menu;
    int i;

    if (esb->option) {
        gtk_widget_destroy (esb->option_menu);
    } else {
        esb->option = gtk_option_menu_new ();
        gtk_widget_show (esb->option);
        gtk_box_pack_start (GTK_BOX (esb), esb->option, FALSE, FALSE, 0);
    }

    esb->option_menu = menu = gtk_menu_new ();
    for (i = 0; items[i].id != -1; i++) {
        GtkWidget *item;
        ESearchBarSubitem *subitems = NULL;

        if (items[i].text) {
            char *str;

            str = string_without_underscores (_(items[i].text));
            if (_(items[i].text) == items[i].text) {
                /* It may be english string, or utf8 rule name */
                item = e_utf8_gtk_menu_item_new_with_label (GTK_MENU (menu), str);
            } else {
                item = gtk_menu_item_new_with_label (str);
            }

            g_free (str);
        } else {
            item = gtk_menu_item_new ();
            gtk_widget_set_sensitive (item, FALSE);
        }

        gtk_menu_append (GTK_MENU (menu), item);

        gtk_object_set_data (GTK_OBJECT (item), "EsbChoiceId", GINT_TO_POINTER(items[i].id));

        if (items[i].subitems != NULL) {
            subitems = copy_subitems (items[i].subitems);
            gtk_object_set_data (GTK_OBJECT (item), "EsbChoiceSubitems", subitems);
            gtk_signal_connect (GTK_OBJECT (item), "destroy",
                        GTK_SIGNAL_FUNC (option_item_destroy_cb), subitems);
        }

        if (i == 0)
            activate_by_subitems (esb, items[i].id, subitems);

        gtk_signal_connect (GTK_OBJECT (item), "activate",
                    GTK_SIGNAL_FUNC (option_activated_cb),
                    esb);
    }

    gtk_widget_show_all (menu);

    gtk_option_menu_set_menu (GTK_OPTION_MENU (esb->option), menu);
    gtk_option_menu_set_history (GTK_OPTION_MENU (esb->option), 0);

    gtk_widget_set_sensitive (esb->option, TRUE);
}

static GtkWidget *
add_button (ESearchBar *esb,
        const char *text,
        GtkSignalFunc callback)
{
    GtkWidget *label;
    GtkWidget *holder;
    GtkWidget *button;

    label = gtk_label_new (text);
    gtk_misc_set_padding (GTK_MISC (label), 2, 0);
    gtk_widget_show (label);
    
    /* See the comment in `put_in_spacer_widget()' to understand
       why we have to do this.  */
    
    button = gtk_button_new ();
    gtk_widget_show (button);
    gtk_container_add (GTK_CONTAINER (button), label);
    
    holder = put_in_spacer_widget (button);
    gtk_widget_show (holder);
    
    gtk_signal_connect (GTK_OBJECT (button), "clicked", callback, esb);
    
    gtk_box_pack_end (GTK_BOX (esb), holder, FALSE, FALSE, 1);

    return button;
}

static int
find_id (GtkWidget *menu, int idin, const char *type, GtkWidget **widget)
{
    GList *l = GTK_MENU_SHELL (menu)->children;
    int row = -1, i = 0, id;

    if (widget)
        *widget = NULL;
    while (l) {
        id = GPOINTER_TO_INT (gtk_object_get_data (l->data, type));
        if (id == idin) {
            row = i;
            if (widget)
                *widget = l->data;
            break;
        }
        i++;
        l = l->next;
    }
    return row;
}


/* GtkObject methods.  */

static void
impl_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ESearchBar *esb = E_SEARCH_BAR (object);

    switch (arg_id) {
    case ARG_ITEM_ID:
        GTK_VALUE_ENUM (*arg) = e_search_bar_get_item_id (esb);
        break;

    case ARG_SUBITEM_ID:
        GTK_VALUE_ENUM (*arg) = e_search_bar_get_subitem_id (esb);
        break;

    case ARG_TEXT:
        GTK_VALUE_STRING (*arg) = e_search_bar_get_text (esb);
        break;

    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static void
impl_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ESearchBar *esb = E_SEARCH_BAR(object);
    
    switch (arg_id) {
    case ARG_ITEM_ID:
        e_search_bar_set_item_id (esb, GTK_VALUE_ENUM (*arg));
        break;

    case ARG_SUBITEM_ID:
        e_search_bar_set_subitem_id (esb, GTK_VALUE_ENUM (*arg));
        break;
        
    case ARG_TEXT:
        e_search_bar_set_text (esb, GTK_VALUE_STRING (*arg));
        break;
        
    default:
        break;
    }
}

static void
impl_destroy (GtkObject *object)
{
    ESearchBar *esb = E_SEARCH_BAR (object);
    
    g_return_if_fail (object != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (object));

    /* These three we do need to unref, because we explicitly hold
       references to them. */

    if (esb->ui_component != NULL) {
        bonobo_object_unref (BONOBO_OBJECT (esb->ui_component));
        esb->ui_component = NULL;
    }
    if (esb->entry)
        gtk_object_unref (GTK_OBJECT (esb->entry));
    if (esb->suboption)
        gtk_object_unref (GTK_OBJECT (esb->suboption));
    
    if (esb->pending_activate) {
        gtk_idle_remove (esb->pending_activate);
        esb->pending_activate = 0;
    }

    free_menu_items (esb);
    
    if (GTK_OBJECT_CLASS (parent_class)->destroy)
        GTK_OBJECT_CLASS (parent_class)->destroy (object);
}


static void
class_init (ESearchBarClass *klass)
{
    GtkObjectClass *object_class;
    
    object_class = GTK_OBJECT_CLASS (klass);
    
    parent_class = gtk_type_class (gtk_hbox_get_type ());
    
    object_class->set_arg = impl_set_arg;
    object_class->get_arg = impl_get_arg;
    object_class->destroy = impl_destroy;
    
    klass->set_menu = set_menu;
    klass->set_option = set_option;
    
    gtk_object_add_arg_type ("ESearchBar::item_id", GTK_TYPE_ENUM,
                 GTK_ARG_READWRITE, ARG_ITEM_ID);
    gtk_object_add_arg_type ("ESearchBar::subitem_id", GTK_TYPE_ENUM,
                 GTK_ARG_READWRITE, ARG_SUBITEM_ID);
    gtk_object_add_arg_type ("ESearchBar::text", GTK_TYPE_STRING,
                 GTK_ARG_READWRITE, ARG_TEXT);
    
    esb_signals [QUERY_CHANGED] =
        gtk_signal_new ("query_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ESearchBarClass, query_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);
    
    esb_signals [MENU_ACTIVATED] =
        gtk_signal_new ("menu_activated",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ESearchBarClass, menu_activated),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    esb_signals [SEARCH_ACTIVATED] =
        gtk_signal_new ("search_activated",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ESearchBarClass, search_activated),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);
    
    gtk_object_class_add_signals (object_class, esb_signals, LAST_SIGNAL);
}

static void
init (ESearchBar *esb)
{
    esb->ui_component     = NULL;
    esb->menu_items       = NULL;

    esb->option           = NULL;
    esb->entry            = NULL;
    esb->suboption        = NULL;
    
    esb->option_menu      = NULL;
    esb->suboption_menu   = NULL;
    esb->activate_button  = NULL;
    esb->clear_button     = NULL;
    esb->entry_box        = NULL;

    esb->pending_activate = 0;

    esb->item_id          = 0;
    esb->subitem_id       = 0;
}


/* Object construction.  */

static gint
idle_activate_hack (gpointer ptr)
{
    ESearchBar *esb = E_SEARCH_BAR (ptr);
    esb->pending_activate = 0;
    emit_search_activated (esb);
    return FALSE;
}

void
e_search_bar_construct (ESearchBar *search_bar,
            ESearchBarItem *menu_items,
            ESearchBarItem *option_items)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));
    g_return_if_fail (option_items != NULL);

    gtk_box_set_spacing (GTK_BOX (search_bar), 1);

    search_bar->clear_button    = add_button (search_bar, _("Clear"),
                          GTK_SIGNAL_FUNC (clear_button_clicked_cb));
    search_bar->activate_button = add_button (search_bar, _("Find Now"),
                          GTK_SIGNAL_FUNC (activate_button_clicked_cb));

    e_search_bar_set_menu (search_bar, menu_items);

    search_bar->entry_box = gtk_hbox_new (0, FALSE);

    e_search_bar_set_option (search_bar, option_items);

    gtk_widget_show (search_bar->entry_box);
    gtk_box_pack_start (GTK_BOX(search_bar), search_bar->entry_box, TRUE, TRUE, 0);

    /* 
     * If the default choice for the option menu has subitems, then we need to
     * activate the search immediately.  However, the developer won't have
     * connected to the activated signal until after the object is constructed,
     * so we can't emit here.  Thus we launch a one-shot idle function that will
     * emit the changed signal, so that the proper callback will get invoked.
     */
    if (search_bar->subitem_id >= 0) {
        gtk_widget_set_sensitive (search_bar->activate_button, FALSE);

        search_bar->pending_activate = gtk_idle_add (idle_activate_hack, search_bar);
    }
}

void
e_search_bar_set_menu (ESearchBar *search_bar, ESearchBarItem *menu_items)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));
    
    ((ESearchBarClass *)((GtkObject *)search_bar)->klass)->set_menu (search_bar, menu_items);
}

void
e_search_bar_add_menu (ESearchBar *search_bar, ESearchBarItem *menu_item)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));
    
    set_menu (search_bar, menu_item);
}

void
e_search_bar_set_option (ESearchBar *search_bar, ESearchBarItem *option_items)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));
    g_return_if_fail (option_items != NULL);
    
    ((ESearchBarClass *)((GtkObject *)search_bar)->klass)->set_option (search_bar, option_items);
}

/**
 * e_search_bar_set_suboption:
 * @search_bar: A search bar.
 * @option_id: Identifier of the main option menu item under which the subitems
 * are to be set.
 * @subitems: Array of subitem information.
 * 
 * Sets the items for the secondary option menu of a search bar.
 **/
void
e_search_bar_set_suboption (ESearchBar *search_bar, int option_id, ESearchBarSubitem *subitems)
{
    int row;
    GtkWidget *item;
    ESearchBarSubitem *old_subitems;
    ESearchBarSubitem *new_subitems;

    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    row = find_id (search_bar->option_menu, option_id, "EsbChoiceId", &item);
    g_return_if_fail (row != -1);
    g_assert (item != NULL);

    old_subitems = gtk_object_get_data (GTK_OBJECT (item), "EsbChoiceSubitems");
    if (old_subitems) {
        /* This was connected in set_option() */
        gtk_signal_disconnect_by_data (GTK_OBJECT (item), old_subitems);
        free_subitems (old_subitems);
        gtk_object_set_data (GTK_OBJECT (item), "EsbChoiceSubitems", NULL);
    }

    if (subitems) {
        new_subitems = copy_subitems (subitems);
        gtk_object_set_data (GTK_OBJECT (item), "EsbChoiceSubitems", new_subitems);
        gtk_signal_connect (GTK_OBJECT (item), "destroy",
                    GTK_SIGNAL_FUNC (option_item_destroy_cb), new_subitems);
    } else
        new_subitems = NULL;

    if (search_bar->item_id == option_id)
        activate_by_subitems (search_bar, option_id, new_subitems);
}

GtkWidget *
e_search_bar_new (ESearchBarItem *menu_items,
          ESearchBarItem *option_items)
{
    GtkWidget *widget;

    g_return_val_if_fail (option_items != NULL, NULL);
    
    widget = GTK_WIDGET (gtk_type_new (e_search_bar_get_type ()));
    
    e_search_bar_construct (E_SEARCH_BAR (widget), menu_items, option_items);
    
    return widget;
}

void
e_search_bar_set_ui_component (ESearchBar *search_bar,
                   BonoboUIComponent *ui_component)
{
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    if (search_bar->ui_component != NULL) {
        remove_bonobo_menus (search_bar);
        bonobo_object_unref (BONOBO_OBJECT (search_bar->ui_component));
    }

    search_bar->ui_component = ui_component;
    if (ui_component != NULL) {
        bonobo_object_ref (BONOBO_OBJECT (ui_component));
        setup_standard_verbs (search_bar);
        setup_bonobo_menus (search_bar);
    }
}

void
e_search_bar_set_menu_sensitive (ESearchBar *search_bar, int id, gboolean state)
{
    char *verb_name;
    char *path;

    verb_name = verb_name_from_id (id);
    path = g_strconcat ("/commands/", verb_name, NULL);
    g_free (verb_name);

    bonobo_ui_component_set_prop (search_bar->ui_component, path,
                      "sensitive", state ? "1" : "0",
                      NULL);

    g_free (path);
}

GtkType
e_search_bar_get_type (void)
{
    static GtkType type = 0;
    
    if (!type) {
        static const GtkTypeInfo info = {
            "ESearchBar",
            sizeof (ESearchBar),
            sizeof (ESearchBarClass),
            (GtkClassInitFunc) class_init,
            (GtkObjectInitFunc) init,
            /* reserved_1 */ NULL,
                /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };
        
        type = gtk_type_unique (gtk_hbox_get_type (), &info);
    }
    
    return type;
}

/**
 * e_search_bar_set_item_id:
 * @search_bar: A search bar.
 * @id: Identifier of the item to set.
 * 
 * Sets the active item in the options menu of a search bar.
 **/
void
e_search_bar_set_item_id (ESearchBar *search_bar, int id)
{
    int row;

    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    row = find_id (search_bar->option_menu, id, "EsbChoiceId", NULL);
    g_return_if_fail (row != -1);

    search_bar->item_id = id;
    gtk_option_menu_set_history (GTK_OPTION_MENU (search_bar->option), row);
    emit_query_changed (search_bar);
}

/**
 * e_search_bar_get_item_id:
 * @search_bar: A search bar.
 * 
 * Queries the currently selected item in the options menu of a search bar.
 * 
 * Return value: Identifier of the selected item in the options menu.
 **/
int
e_search_bar_get_item_id (ESearchBar *search_bar)
{
    g_return_val_if_fail (search_bar != NULL, -1);
    g_return_val_if_fail (E_IS_SEARCH_BAR (search_bar), -1);
    
    return search_bar->item_id;
}

void
e_search_bar_set_subitem_id (ESearchBar *search_bar, int id)
{
    int row;

    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    row = find_id (search_bar->suboption_menu, id, "EsbSubitemId", NULL);
    g_return_if_fail (row != -1);

    search_bar->subitem_id = id;
    gtk_option_menu_set_history (GTK_OPTION_MENU (search_bar->suboption), row);
}

/**
 * e_search_bar_get_subitem_id:
 * @search_bar: A search bar.
 * 
 * Queries the currently selected item in the suboptions menu of a search bar.
 * 
 * Return value: Identifier of the selected item in the suboptions menu.
 * If the search bar currently contains an entry rather than a a suboption menu,
 * a value less than zero is returned.
 **/
int
e_search_bar_get_subitem_id (ESearchBar *search_bar)
{
    g_return_val_if_fail (search_bar != NULL, -1);
    g_return_val_if_fail (E_IS_SEARCH_BAR (search_bar), -1);
    
    return search_bar->subitem_id;
}

/**
 * e_search_bar_set_ids:
 * @search_bar: A search bar.
 * @item_id: Identifier of the item to set.
 * @subitem_id: Identifier of the subitem to set.
 * 
 * Sets the item and subitem ids for a search bar.  This is intended to switch
 * to an item that has subitems.
 **/
void
e_search_bar_set_ids (ESearchBar *search_bar, int item_id, int subitem_id)
{
    int item_row;
    GtkWidget *item_widget;
    ESearchBarSubitem *subitems;

    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    item_row = find_id (search_bar->option_menu, item_id, "EsbChoiceId", &item_widget);
    g_return_if_fail (item_row != -1);
    g_assert (item_widget != NULL);

    subitems = gtk_object_get_data (GTK_OBJECT (item_widget), "EsbChoiceSubitems");
    g_return_if_fail (subitems != NULL);

    search_bar->item_id = item_id;
    gtk_option_menu_set_history (GTK_OPTION_MENU (search_bar->option), item_row);

    activate_by_subitems (search_bar, item_id, subitems);
    e_search_bar_set_subitem_id (search_bar, subitem_id);
}

/**
 * e_search_bar_set_text:
 * @search_bar: A search bar.
 * @text: Text to set in the search bar's entry line.
 *
 * Sets the text string inside the entry line of a search bar.
 **/
void
e_search_bar_set_text (ESearchBar *search_bar, const char *text)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));

    e_utf8_gtk_editable_set_text (GTK_EDITABLE (search_bar->entry), text);
}

/**
 * e_search_bar_get_text:
 * @search_bar: A search bar.
 * 
 * Queries the text of the entry line in a search bar.
 * 
 * Return value: The text string that is in the entry line of the search bar.
 * This must be freed using g_free().  If a suboption menu is active instead
 * of an entry, NULL is returned.
 **/
char *
e_search_bar_get_text (ESearchBar *search_bar)
{
    g_return_val_if_fail (search_bar != NULL, NULL);
    g_return_val_if_fail (E_IS_SEARCH_BAR (search_bar), NULL);
    
    return search_bar->subitem_id < 0 ? e_utf8_gtk_editable_get_text (GTK_EDITABLE (search_bar->entry)) : NULL;
}