update en_GB translation

[claws.git] / src / addr_compl.c

/*
 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
 *
 * Copyright (C) 2000-2012 by Alfons Hoogervorst & The Claws Mail Team.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#include "claws-features.h"
#endif
#include "defs.h"

#include <glib.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>

#include <string.h>
#include <ctype.h>
#if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
#  include <wchar.h>
#  include <wctype.h>
#endif

#include "addr_compl.h"
#include "addritem.h"
#include "utils.h"
#include "prefs_common.h"
#include "claws.h"
#include "hooks.h"
#include "gtkutils.h"
#include "stock_pixmap.h"
#include <pthread.h>

#ifndef USE_ALT_ADDRBOOK
        #include "addrindex.h"
#else
        #include "addressbook-dbus.h"
#endif

/*!
 *\brief        For the GtkListStore
 */
enum {
        ADDR_COMPL_ICON,
        ADDR_COMPL_ADDRESS,
        ADDR_COMPL_ISGROUP,
        ADDR_COMPL_GROUPLIST,
        N_ADDR_COMPL_COLUMNS
};

/*
 * How it works:
 *
 * The address book is read into memory. We set up an address list
 * containing all address book entries. Next we make the completion
 * list, which contains all the completable strings, and store a
 * reference to the address entry it belongs to.
 * After calling the g_completion_complete(), we get a reference
 * to a valid email address.  
 *
 * Completion is very simplified. We never complete on another prefix,
 * i.e. we neglect the next smallest possible prefix for the current
 * completion cache. This is simply done so we might break up the
 * addresses a little more (e.g. break up alfons@proteus.demon.nl into
 * something like alfons, proteus, demon, nl; and then completing on
 * any of those words).
 */

/**
 * completion_entry - structure used to complete addresses, with a reference
 * the the real address information.
 */
typedef struct
{
        gchar           *string; /* string to complete */
        address_entry   *ref;    /* address the string belongs to  */
} completion_entry;

/*******************************************************************************/

static gint         g_ref_count;        /* list ref count */
static GList       *g_completion_list = NULL;   /* list of strings to be checked */
static GList       *g_address_list = NULL;      /* address storage */
static GCompletion *g_completion;       /* completion object */

static GHashTable *_groupAddresses_ = NULL;
static gboolean _allowCommas_ = TRUE;

/* To allow for continuing completion we have to keep track of the state
 * using the following variables. No need to create a context object. */

static gint         g_completion_count;         /* nr of addresses incl. the prefix */
static gint         g_completion_next;          /* next prev address */
static GSList      *g_completion_addresses;     /* unique addresses found in the
                                                   completion cache. */
static gchar       *g_completion_prefix;        /* last prefix. (this is cached here
                                                 * because the prefix passed to g_completion
                                                 * is g_utf8_strdown()'ed */

static gchar *completion_folder_path = NULL;

/*******************************************************************************/

/*
 * Define the structure of the completion window.
 */
typedef struct _CompletionWindow CompletionWindow;
struct _CompletionWindow {
        gint      listCount;
        gchar     *searchTerm;
        GtkWidget *window;
        GtkWidget *entry;
        GtkWidget *list_view;

        gboolean   in_mouse;    /*!< mouse press pending... */
        gboolean   destroying;  /*!< destruction in progress */
};

static GtkListStore *addr_compl_create_store    (void);

static GtkWidget *addr_compl_list_view_create   (CompletionWindow *window);

static void addr_compl_create_list_view_columns (GtkWidget *list_view);

static gboolean list_view_button_press          (GtkWidget *widget, 
                                                 GdkEventButton *event,
                                                 CompletionWindow *window);

static gboolean list_view_button_release        (GtkWidget *widget, 
                                                 GdkEventButton *event,
                                                 CompletionWindow *window);

static gboolean addr_compl_selected             (GtkTreeSelection *selector,
                                                 GtkTreeModel *model, 
                                                 GtkTreePath *path,
                                                 gboolean currently_selected,
                                                 gpointer data);
                                                 
static gboolean addr_compl_defer_select_destruct(CompletionWindow *window);

/**
 * Function used by GTK to find the string data to be used for completion.
 * \param data Pointer to data being processed.
 */
static gchar *completion_func(gpointer data)
{
        cm_return_val_if_fail(data != NULL, NULL);

        return ((completion_entry *)data)->string;
} 

static gint addr_completion_func(const gchar *needle, const gchar *haystack,
                gsize n)
{
        if (needle == NULL || haystack == NULL)
                return 1;

        return (strcasestr(haystack, needle) != NULL ? 0 : 1);
}

/**
 * Function used by GTK to compare elements for sorting
 * name match beginning > name match after space > email address
 *   match beginning and full match before @ > email adress
 *   match beginning. Otherwise match position in string.
 * \param a first element in comparsion
 * \param b second element in comparison
 */
static gint weight_addr_match(const address_entry* addr)
{
        gint    n_weight = addr->name ? strlen(addr->name): 0;
        gint    a_weight = addr->address ? strlen(addr->address) : n_weight;
        gchar*  match = NULL;

        if (addr->name)
                match = strcasestr(addr->name, g_completion_prefix);

        if (match != NULL) {
                if (match == addr->name)
                        n_weight = -4;
                else if (match > addr->name && *(match - 1) == ' ')
                        n_weight = -3;
                else
                        n_weight = match - addr->name;
        }

        if (addr->address) {
                match = strcasestr(addr->address, g_completion_prefix);
                if (match != NULL) {
                        if (match == addr->address)
                                a_weight = -1;
                        else
                                a_weight = match - addr->address;

                        if (strlen(match) > strlen(g_completion_prefix)
                         && *(match + strlen(g_completion_prefix)) == '@')
                                a_weight--;
                }
        }

        if (n_weight == -4 && a_weight < 0)
                n_weight = -5;

        return MIN(a_weight, n_weight);
}

static gint addr_comparison_func(gconstpointer a, gconstpointer b)
{
        const address_entry*    a_ref = (const address_entry*)a;
        const address_entry*    b_ref = (const address_entry*)b;
        gint                    a_weight = weight_addr_match(a_ref);
        gint                    b_weight = weight_addr_match(b_ref);
        gint                    cmp;

        if (a_weight < b_weight)
                return -1;
        else if (a_weight > b_weight)
                return 1;
        else {
                if (!a_ref->name || !b_ref->name)
                  cmp = !!a_ref->name - !!b_ref->name;
                else
                  cmp = strcmp(a_ref->name, b_ref->name);
                if (!cmp)
                  {
                    if (!a_ref->address || !b_ref->address)
                      cmp = !!a_ref->address - !!b_ref->address;
                    else
                      cmp = g_strcmp0(a_ref->address, b_ref->address);
                  }
                return cmp;
        }
}

/**
 * Initialize all completion index data.
 */
static void init_all(void)
{
        g_completion = g_completion_new(completion_func);
        cm_return_if_fail(g_completion != NULL);
}

/**
 * set the compare function (default is strncmp)
 */
static void set_match_any_part(const gboolean any_part)
{
        if (any_part && prefs_common.address_search_wildcard)
                g_completion_set_compare(g_completion, addr_completion_func);
        else
                g_completion_set_compare(g_completion, strncmp);
}

static void free_all_addresses(void)
{
        GList *walk;
        if (!g_address_list)
                return;
        walk = g_address_list;
        for (; walk != NULL; walk = g_list_next(walk)) {
                address_entry *ae = (address_entry *) walk->data;
                g_free(ae->name);
                g_free(ae->address);
                g_list_free(ae->grp_emails);
                g_free(walk->data);
        }
        g_list_free(g_address_list);
        g_address_list = NULL;
        if (_groupAddresses_)
                g_hash_table_destroy(_groupAddresses_);
        _groupAddresses_ = NULL;
}

static void clear_completion_cache(void);
static void free_completion_list(void)
{
        GList *walk;
        if (!g_completion_list)
                return;
        
        clear_completion_cache();
        if (g_completion)
                g_completion_clear_items(g_completion);

        walk = g_list_first(g_completion_list);
        for (; walk != NULL; walk = g_list_next(walk)) {
                completion_entry *ce = (completion_entry *) walk->data;
                g_free(ce->string);
                g_free(walk->data);
        }
        g_list_free(g_completion_list);
        g_completion_list = NULL;
}
/**
 * Free up all completion index data.
 */
static void free_all(void)
{
        free_completion_list(); 
        free_all_addresses();   
        g_completion_free(g_completion);
        g_completion = NULL;
}

/**
 * Append specified address entry to the index.
 * \param str Index string value.
 * \param ae  Entry containing address data.
 */
void addr_compl_add_address1(const char *str, address_entry *ae)
{
        completion_entry *ce1;
        ce1 = g_new0(completion_entry, 1),
        /* GCompletion list is case sensitive */
        ce1->string = g_utf8_strdown(str, -1);
        ce1->ref = ae;

        g_completion_list = g_list_prepend(g_completion_list, ce1);
}

/**
 * Adds address to the completion list. This function looks complicated, but
 * it's only allocation checks. Each value will be included in the index.
 * \param name    Recipient name.
 * \param address EMail address.
 * \param alias   Alias to append.
 * \param grp_emails the emails in case of a group. List should be freed later, 
 * but not its strings
 * \return <code>0</code> if entry appended successfully, or <code>-1</code>
 *         if failure.
 */
static gint add_address(const gchar *name, const gchar *address, 
                        const gchar *nick, const gchar *alias, GList *grp_emails)
{
        address_entry *ae;

        if (!address && !grp_emails)
                return -1;

        if (!name)
                name = "";

        ae = g_new0(address_entry, 1);
        cm_return_val_if_fail(ae != NULL, -1);

        ae->name = g_strdup(name);
        ae->address = g_strdup(address);
        ae->grp_emails = grp_emails;
        g_address_list = g_list_prepend(g_address_list, ae);

        addr_compl_add_address1(name, ae);

        if (address != NULL && *address != '\0')
                addr_compl_add_address1(address, ae);

        if (nick != NULL && *nick != '\0')
                addr_compl_add_address1(nick, ae);

        if (alias != NULL && *alias != '\0')
                addr_compl_add_address1(alias, ae);

        return 0;
}

/**
 * Read address book, creating all entries in the completion index.
 */ 
static void read_address_book(gchar *folderpath) {
        free_all_addresses();
        free_completion_list();

#ifndef USE_ALT_ADDRBOOK
        addrindex_load_completion( add_address, folderpath );
#else
        GError* error = NULL;
        
        addrcompl_initialize();
        if (! addrindex_dbus_load_completion(add_address, &error)) {
                g_warning("Failed to populate address completion list");
        g_error_free(error);
                return;
        }
#endif
        /* plugins may hook in here to modify/extend the completion list */
        if(!folderpath) {
                hooks_invoke(ADDDRESS_COMPLETION_BUILD_ADDRESS_LIST_HOOKLIST, &g_address_list);
        }

        g_address_list = g_list_reverse(g_address_list);
        g_completion_list = g_list_reverse(g_completion_list);
        /* merge the completion entry list into g_completion */
        if (g_completion_list) {
                g_completion_add_items(g_completion, g_completion_list);
                if (debug_get_mode())
                        debug_print("read %d items in %s\n",
                                g_list_length(g_completion_list),
                                folderpath?folderpath:"(null)");
        }
}

/**
 * Test whether there is a completion pending.
 * \return <code>TRUE</code> if pending.
 */
static gboolean is_completion_pending(void)
{
        /* check if completion pending, i.e. we might satisfy a request for the next
         * or previous address */
         return g_completion_count;
}

/**
 * Clear the completion cache.
 */
static void clear_completion_cache(void)
{
        if (is_completion_pending()) {
                g_free(g_completion_prefix);

                if (g_completion_addresses) {
                        g_slist_free(g_completion_addresses);
                        g_completion_addresses = NULL;
                }

                g_completion_count = g_completion_next = 0;
        }
}

/**
 * Prepare completion index. This function should be called prior to attempting
 * address completion.
 * \return The number of addresses in the completion list.
 */
guint start_address_completion(gchar *folderpath)
{
        gboolean different_book = FALSE;
        clear_completion_cache();

        if (g_strcmp0(completion_folder_path,folderpath))
                different_book = TRUE;

        g_free(completion_folder_path);
        if (folderpath != NULL)
                completion_folder_path = g_strdup(folderpath);
        else
                completion_folder_path = NULL;

        if (!g_ref_count) {
                init_all();
                /* open the address book */
                read_address_book(folderpath);
        } else if (different_book)
                read_address_book(folderpath);

        g_ref_count++;
        debug_print("start_address_completion(%s) ref count %d\n",
                                folderpath?folderpath:"(null)", g_ref_count);

        return g_list_length(g_completion_list);
}

/**
 * Retrieve a possible address (or a part) from an entry box. To make life
 * easier, we only look at the last valid address component; address
 * completion only works at the last string component in the entry box.
 *
 * \param entry Address entry field.
 * \param start_pos Address of start position of address.
 * \return Possible address.
 */
static gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
{
        const gchar *edit_text, *p;
        gint cur_pos;
        gboolean in_quote = FALSE;
        gboolean in_bracket = FALSE;
        gchar *str;

        edit_text = gtk_entry_get_text(entry);
        if (edit_text == NULL) return NULL;

        cur_pos = gtk_editable_get_position(GTK_EDITABLE(entry));

        /* scan for a separator. doesn't matter if walk points at null byte. */
        for (p = g_utf8_offset_to_pointer(edit_text, cur_pos);
             p > edit_text;
             p = g_utf8_prev_char(p)) {
                if (*p == '"') {
                        in_quote = TRUE;
                } else if (!in_quote) {
                        if (!in_bracket && *p == ',') {
                                break;
                        } else if (*p == '<')
                                in_bracket = TRUE;
                        else if (*p == '>')
                                in_bracket = FALSE;
                }
        }

        /* have something valid */
        if (g_utf8_strlen(p, -1) == 0)
                return NULL;

#define IS_VALID_CHAR(x) \
        (g_ascii_isalnum(x) || (x) == '"' || (x) == '<' || (((unsigned char)(x)) > 0x7f))

        /* now scan back until we hit a valid character */
        for (; *p && !IS_VALID_CHAR(*p); p = g_utf8_next_char(p))
                ;

#undef IS_VALID_CHAR

        if (g_utf8_strlen(p, -1) == 0)
                return NULL;

        if (start_pos) *start_pos = g_utf8_pointer_to_offset(edit_text, p);

        str = g_strdup(p);

        return str;
} 

static gchar *get_complete_address_from_name_email(const gchar *name, const gchar *email)
{
        gchar *address = NULL;
        if (!name || name[0] == '\0')
                address = g_strdup_printf("<%s>", email);
        else if (strchr_with_skip_quote(name, '"', ','))
                address = g_strdup_printf
                        ("\"%s\" <%s>", name, email);
        else
                address = g_strdup_printf
                        ("%s <%s>", name, email);
        return address;
}

/**
 * Replace an incompleted address with a completed one.
 * \param entry     Address entry field.
 * \param newtext   New text.
 * \param start_pos Insertion point in entry field.
 */
static void replace_address_in_edit(GtkEntry *entry, const gchar *newtext,
                             gint start_pos, gboolean is_group, GList *grp_emails)
{
        if (!newtext) return;
        gtk_editable_delete_text(GTK_EDITABLE(entry), start_pos, -1);
        if (!is_group) {
                gtk_editable_insert_text(GTK_EDITABLE(entry), newtext, strlen(newtext),
                                 &start_pos);
        } else {
                gchar *addresses = NULL;
                GList *cur = grp_emails;
                for (; cur; cur = cur->next) {
                        gchar *tmp;
                        ItemEMail *email = (ItemEMail *)cur->data;
                        ItemPerson *person = ( ItemPerson * ) ADDRITEM_PARENT(email);
                        
                        gchar *addr = get_complete_address_from_name_email(
                                ADDRITEM_NAME(person), email->address);
                        if (addresses)
                                tmp = g_strdup_printf("%s, %s", addresses, addr);
                        else
                                tmp = g_strdup_printf("%s", addr);
                        g_free(addr);
                        g_free(addresses);
                        addresses = tmp;
                }
                gtk_editable_insert_text(GTK_EDITABLE(entry), addresses, strlen(addresses),
                                 &start_pos);
                g_free(addresses);
        }
        gtk_editable_set_position(GTK_EDITABLE(entry), -1);
}

/**
 * Attempt to complete an address, and returns the number of addresses found.
 * Use <code>get_complete_address()</code> to get an entry from the index.
 *
 * \param  str Search string to find.
 * \return Zero if no match was found, otherwise the number of addresses; the
 *         original prefix (search string) will appear at index 0. 
 */
guint complete_address(const gchar *str)
{
        GList *result = NULL;
        gchar *d = NULL;
        guint  count = 0;
        guint  cpl = 0;
        completion_entry *ce = NULL;

        cm_return_val_if_fail(str != NULL, 0);

        /* g_completion is case sensitive */
        d = g_utf8_strdown(str, -1);

        clear_completion_cache();
        g_completion_prefix = g_strdup(str);

        result = g_completion_complete(g_completion, d, NULL);

        count = g_list_length(result);
        if (count) {
                /* create list with unique addresses  */
                for (cpl = 0, result = g_list_first(result);
                     result != NULL;
                     result = g_list_next(result)) {
                        ce = (completion_entry *)(result->data);
                        if (NULL == g_slist_find(g_completion_addresses,
                                                 ce->ref)) {
                                cpl++;
                                g_completion_addresses =
                                        g_slist_append(g_completion_addresses,
                                                       ce->ref);
                        }
                }
                count = cpl + 1;        /* index 0 is the original prefix */
                g_completion_next = 1;  /* we start at the first completed one */
                if (prefs_common.address_search_wildcard)
                    g_completion_addresses = g_slist_sort(g_completion_addresses,
                                                          addr_comparison_func);
        } else {
                g_free(g_completion_prefix);
                g_completion_prefix = NULL;
        }

        g_completion_count = count;

        g_free(d);

        return count;
}

/**
 * complete_matches_found() returns the number of matched addresses according
 * to the completion mechanism. Unlike complete_address(), the returned value
 * doesn't count str itself. If there's no match, it returns 0.
 * To get a list of completion matches, see complete_address() instead.
 */
guint complete_matches_found(const gchar *str)
{
        GList *result = NULL;
        gchar *d = NULL;

        cm_return_val_if_fail(str != NULL, 0);

        /* g_completion is case sensitive */
        d = g_utf8_strdown(str, -1);

        clear_completion_cache();
        g_completion_prefix = g_strdup(str);

        result = g_completion_complete(g_completion, d, NULL);

        g_free(g_completion_prefix);
        g_free(d);

        return g_list_length(result);
}

/**
 * Return a complete address from the index.
 * \param index Index of entry that was found (by the previous call to
 *              <code>complete_address()</code>
 * \return Completed address string; this should be freed when done.
 */
gchar *get_complete_address(gint index)
{
        const address_entry *p;
        gchar *address = NULL;

        if (index < g_completion_count) {
                if (index == 0)
                        address = g_strdup(g_completion_prefix);
                else {
                        /* get something from the unique addresses */
                        p = (address_entry *)g_slist_nth_data
                                (g_completion_addresses, index - 1);
                        if (p != NULL && p->address != NULL) {
                                address = get_complete_address_from_name_email(p->name, p->address);
                        } else if (p != NULL && p->address == NULL && p->name != NULL) {
                                /* that's a group */
                                address = g_strdup_printf("%s (%s) <!--___group___-->", p->name, _("Group"));
                                if (!_groupAddresses_) {
                                        _groupAddresses_ = g_hash_table_new(NULL, g_direct_equal);
                                }
                                if (!g_hash_table_lookup(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)))) {
                                        g_hash_table_insert(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)), p->grp_emails);

                                }
                        }
                }
        }

        return address;
}

/**
 * Return the next complete address match from the completion index.
 * \return Completed address string; this should be freed when done.
 */
static gchar *get_next_complete_address(void)
{
        if (is_completion_pending()) {
                gchar *res;

                res = get_complete_address(g_completion_next);
                g_completion_next += 1;
                if (g_completion_next >= g_completion_count)
                        g_completion_next = 0;

                return res;
        } else
                return NULL;
}

/**
 * Return a count of the completed matches in the completion index.
 * \return Number of matched entries.
 */
static guint get_completion_count(void)
{
        if (is_completion_pending())
                return g_completion_count;
        else
                return 0;
}

/**
 * Invalidate address completion index. This function should be called whenever
 * the address book changes. This forces data to be read into the completion
 * data.
 * \return Number of entries in index.
 */
gint invalidate_address_completion(void)
{
        if (g_ref_count) {
                /* simply the same as start_address_completion() */
                debug_print("Invalidation request for address completion\n");
                read_address_book(completion_folder_path);
                clear_completion_cache();
        }

        return g_list_length(g_completion_list);
}

/**
 * Finished with completion index. This function should be called after
 * matching addresses.
 * \return Reference count.
 */
gint end_address_completion(void)
{
        gboolean different_folder = FALSE;
        clear_completion_cache();

        /* reset the folderpath to NULL */
        if (completion_folder_path) {
                g_free(completion_folder_path);
                completion_folder_path = NULL;
                different_folder = TRUE;
        }
        if (0 == --g_ref_count)
                free_all();

        debug_print("end_address_completion ref count %d\n", g_ref_count);
        if (g_ref_count && different_folder) {
                debug_print("still ref'd, different folder\n");
                invalidate_address_completion();
        }

        return g_ref_count; 
}

/**
 * Completion window.
 */
static CompletionWindow *_compWindow_ = NULL;

/**
 * Mutex to protect callback from multiple threads.
 */
static pthread_mutex_t _completionMutex_ = PTHREAD_MUTEX_INITIALIZER;

/**
 * Completion queue list.
 */
static GList *_displayQueue_ = NULL;
/**
 * Current query ID.
 */
static gint _queryID_ = 0;

/**
 * Completion idle ID.
 */
static guint _completionIdleID_ = 0;

/*
 * address completion entry ui. the ui (completion list was inspired by galeon's
 * auto completion list). remaining things powered by claws's completion engine.
 */

#define ENTRY_DATA_TAB_HOOK     "tab_hook"      /* used to lookup entry */
#define ENTRY_DATA_ALLOW_COMMAS "allowcommas"   /* used to know whether to present groups */

static void address_completion_mainwindow_set_focus     (GtkWindow   *window,
                                                         GtkWidget   *widget,
                                                         gpointer     data);
static gboolean address_completion_entry_key_pressed    (GtkEntry    *entry,
                                                         GdkEventKey *ev,
                                                         gpointer     data);
static gboolean address_completion_complete_address_in_entry
                                                        (GtkEntry    *entry,
                                                         gboolean     next);
static void address_completion_create_completion_window (GtkEntry    *entry);

static gboolean completion_window_button_press
                                        (GtkWidget       *widget,
                                         GdkEventButton  *event,
                                         CompletionWindow *compWin );

static gboolean completion_window_key_press
                                        (GtkWidget       *widget,
                                         GdkEventKey     *event,
                                         CompletionWindow *compWin );
static void address_completion_create_completion_window( GtkEntry *entry_ );

/**
 * Create a completion window object.
 * \return Initialized completion window.
 */
static CompletionWindow *addrcompl_create_window( void ) {
        CompletionWindow *cw;

        cw = g_new0( CompletionWindow, 1 );
        cw->listCount = 0;
        cw->searchTerm = NULL;
        cw->window = NULL;
        cw->entry = NULL;
        cw->list_view = NULL;
        cw->in_mouse = FALSE;
        cw->destroying = FALSE;

        return cw;      
}

/**
 * Destroy completion window.
 * \param cw Window to destroy.
 */
static void addrcompl_destroy_window( CompletionWindow *cw ) {
        /* Stop all searches currently in progress */
#ifndef USE_ALT_ADDRBOOK
        addrindex_stop_search( _queryID_ );
#endif
        /* Remove idler function... or application may not terminate */
        if( _completionIdleID_ != 0 ) {
                g_source_remove( _completionIdleID_ );
                _completionIdleID_ = 0;
        }

        /* Now destroy window */        
        if( cw ) {
                /* Clear references to widgets */
                cw->entry = NULL;
                cw->list_view = NULL;

                /* Free objects */
                if( cw->window ) {
                        gtk_widget_hide( cw->window );
                        gtk_widget_destroy( cw->window );
                }
                cw->window = NULL;
                cw->destroying = FALSE;
                cw->in_mouse = FALSE;
        }
        
        /* Re-enable keyboard, required at least for Gtk3/Win32 */
        gdk_keyboard_ungrab(GDK_CURRENT_TIME);
}

/**
 * Free up completion window.
 * \param cw Window to free.
 */
static void addrcompl_free_window( CompletionWindow *cw ) {
        if( cw ) {
                addrcompl_destroy_window( cw );

                g_free( cw->searchTerm );
                cw->searchTerm = NULL;

                /* Clear references */          
                cw->listCount = 0;

                /* Free object */               
                g_free( cw );
        }
}

/**
 * Advance selection to previous/next item in list.
 * \param list_view List to process.
 * \param forward Set to <i>TRUE</i> to select next or <i>FALSE</i> for
 *                previous entry.
 */
static void completion_window_advance_selection(GtkTreeView *list_view, gboolean forward)
{
        GtkTreeSelection *selection;
        GtkTreeIter iter;
        GtkTreeModel *model;

        cm_return_if_fail(list_view != NULL);

        selection = gtk_tree_view_get_selection(list_view);
        if (!gtk_tree_selection_get_selected(selection, &model, &iter))
                return;

        if (forward) { 
                forward = gtk_tree_model_iter_next(model, &iter);
                if (forward) 
                        gtk_tree_selection_select_iter(selection, &iter);
        } else {
                GtkTreePath *prev;

                prev = gtk_tree_model_get_path(model, &iter);
                if (!prev) 
                        return;

                if (gtk_tree_path_prev(prev))
                        gtk_tree_selection_select_path(selection, prev);
                
                gtk_tree_path_free(prev);
        }
}

/**
 * Resize window to accommodate maximum number of address entries.
 * \param cw Completion window.
 */
static void addrcompl_resize_window( CompletionWindow *cw ) {
        GtkRequisition r;
        GdkGrabStatus status;
        gint x, y, width, height, depth;

        /* Get current geometry of window */
        gdk_window_get_geometry( gtk_widget_get_window( cw->window ), &x, &y, &width, &height, &depth );

        gtk_widget_queue_resize_no_redraw(cw->list_view);
        gtk_widget_size_request( cw->list_view, &r );

        /* Adjust window height to available screen space */
        if( y + r.height > gdk_screen_height())
                r.height = gdk_screen_height() - y;

        gtk_widget_set_size_request(cw->window, width, r.height);

        gdk_pointer_grab(gtk_widget_get_window(cw->window), TRUE,
                         GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
                         GDK_BUTTON_RELEASE_MASK,
                         NULL, NULL, GDK_CURRENT_TIME);
        status = gdk_keyboard_grab(gtk_widget_get_window(cw->window), FALSE, GDK_CURRENT_TIME);
        if (status != GDK_GRAB_SUCCESS)
                g_warning("gdk_keyboard_grab failed with status %d", status);
        gtk_grab_add(cw->window);

}

static GdkPixbuf *group_pixbuf = NULL;
static GdkPixbuf *email_pixbuf = NULL;

/**
 * Add an address the completion window address list.
 * \param cw      Completion window.
 * \param address Address to add.
 */
static void addrcompl_add_entry( CompletionWindow *cw, gchar *address ) {
        GtkListStore *store;
        GtkTreeIter iter;
        GtkTreeSelection *selection;
        gboolean is_group = FALSE;
        GList *grp_emails = NULL;
        store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(cw->list_view)));
        GdkPixbuf *pixbuf;
        
        if (!group_pixbuf) {
                stock_pixbuf_gdk(STOCK_PIXMAP_ADDR_TWO, &group_pixbuf);
                g_object_ref(G_OBJECT(group_pixbuf));
        }
        if (!email_pixbuf) {
                stock_pixbuf_gdk(STOCK_PIXMAP_ADDR_ONE, &email_pixbuf);
                g_object_ref(G_OBJECT(email_pixbuf));
        }
        /* g_print( "\t\tAdding :%s\n", address ); */
        if (strstr(address, " <!--___group___-->")) {
                is_group = TRUE;
                if (_groupAddresses_)
                        grp_emails = g_hash_table_lookup(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)));
                *(strstr(address, " <!--___group___-->")) = '\0';
                pixbuf = group_pixbuf;
        } else if (strchr(address, '@') && strchr(address, '<') &&
                   strchr(address, '>')) {
                pixbuf = email_pixbuf;
        } else
                pixbuf = NULL;
        
        if (is_group && !_allowCommas_)
                return;
        gtk_list_store_append(store, &iter);
        gtk_list_store_set(store, &iter, 
                                ADDR_COMPL_ICON, pixbuf,
                                ADDR_COMPL_ADDRESS, address, 
                                ADDR_COMPL_ISGROUP, is_group, 
                                ADDR_COMPL_GROUPLIST, grp_emails,
                                -1);
        cw->listCount++;

        /* Resize window */
        addrcompl_resize_window( cw );
        gtk_grab_add( cw->window );

        selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(cw->list_view));
        if (!gtk_tree_model_get_iter_first(GTK_TREE_MODEL(store), &iter))
                return;

        if (cw->listCount == 1) {
                /* Select first row for now */
                gtk_tree_selection_select_iter(selection, &iter);
        }
#ifndef GENERIC_UMPC
        else if (cw->listCount == 2) {
                if (gtk_tree_model_iter_next(GTK_TREE_MODEL(store), &iter)) {
                        /* Move off first row */
                        gtk_tree_selection_select_iter(selection, &iter);
                }
        }
#endif
}

void addrcompl_reflect_prefs_pixmap_theme(void) {
        if (group_pixbuf) {
                g_object_unref(G_OBJECT(group_pixbuf));
                group_pixbuf = NULL;
        }
        if (email_pixbuf) {
                g_object_unref(G_OBJECT(email_pixbuf));
                email_pixbuf = NULL;
        }
}

/**
 * Completion idle function. This function is called by the main (UI) thread
 * during UI idle time while an address search is in progress. Items from the
 * display queue are processed and appended to the address list.
 *
 * \param data Target completion window to receive email addresses.
 * \return <i>TRUE</i> to ensure that idle event do not get ignored.
 */
static gboolean addrcompl_idle( gpointer data ) {
        GList *node;
        gchar *address;

        /* Process all entries in display queue */
        pthread_mutex_lock( & _completionMutex_ );
        if( _displayQueue_ ) {
                node = _displayQueue_;
                while( node ) {
                        address = node->data;
                        /* g_print( "address ::: %s :::\n", address ); */
                        addrcompl_add_entry( _compWindow_, address );
                        g_free( address );
                        node = g_list_next( node );
                }
                g_list_free( _displayQueue_ );
                _displayQueue_ = NULL;
        }
        pthread_mutex_unlock( & _completionMutex_ );
        claws_do_idle();

        return TRUE;
}

/**
 * Callback entry point. The background thread (if any) appends the address
 * list to the display queue.
 * \param sender     Sender of query.
 * \param queryID    Query ID of search request.
 * \param listEMail  List of zero of more email objects that met search
 *                   criteria.
 * \param data       Query data.
 */
#ifndef USE_ALT_ADDRBOOK
static gint addrcompl_callback_entry(
        gpointer sender, gint queryID, GList *listEMail, gpointer data )
{
        GList *node;
        gchar *address;

        /* g_print( "addrcompl_callback_entry::queryID=%d\n", queryID ); */
        pthread_mutex_lock( & _completionMutex_ );
        if( queryID == _queryID_ ) {
                /* Append contents to end of display queue */
                node = listEMail;
                while( node ) {
                        ItemEMail *email = node->data;

                        address = addritem_format_email( email );
                        /* g_print( "\temail/address ::%s::\n", address ); */
                        _displayQueue_ = g_list_append( _displayQueue_, address );
                        node = g_list_next( node );
                }
        }
        g_list_free( listEMail );
        pthread_mutex_unlock( & _completionMutex_ );

        return 0;
}
#endif

/**
 * Clear the display queue.
 */
static void addrcompl_clear_queue( void ) {
        /* Clear out display queue */
        pthread_mutex_lock( & _completionMutex_ );

        g_list_free_full( _displayQueue_, g_free );
        _displayQueue_ = NULL;

        pthread_mutex_unlock( & _completionMutex_ );
}

/**
 * Add a single address entry into the display queue.
 * \param address Address to append.
 */
static void addrcompl_add_queue( gchar *address ) {
        pthread_mutex_lock( & _completionMutex_ );
        _displayQueue_ = g_list_append( _displayQueue_, address );
        pthread_mutex_unlock( & _completionMutex_ );
}

/**
 * Load list with entries from local completion index.
 */
static void addrcompl_load_local( void ) {
        guint count = 0;

        for (count = 0; count < get_completion_count(); count++) {
                gchar *address;

                address = get_complete_address( count );
                /* g_print( "\taddress ::%s::\n", address ); */

                /* Append contents to end of display queue */
                addrcompl_add_queue( address );
        }
}

/**
 * Start the search.
 */
static void addrcompl_start_search( void ) {
#ifndef USE_ALT_ADDRBOOK
        gchar *searchTerm;

        searchTerm = g_strdup( _compWindow_->searchTerm );

        /* Setup the search */
        _queryID_ = addrindex_setup_search(
                searchTerm, NULL, addrcompl_callback_entry );
        g_free( searchTerm );
#endif
        /* g_print( "addrcompl_start_search::queryID=%d\n", _queryID_ ); */

        /* Load local stuff */
        addrcompl_load_local();

        /* Sit back and wait until something happens */
        _completionIdleID_ =
                g_idle_add( (GSourceFunc) addrcompl_idle, NULL );
        /* g_print( "addrindex_start_search::queryID=%d\n", _queryID_ ); */

#ifndef USE_ALT_ADDRBOOK
        addrindex_start_search( _queryID_ );
#else
        
#endif
}

/**
 * Apply the current selection in the list to the entry field. Focus is also
 * moved to the next widget so that Tab key works correctly.
 * \param list_view List to process.
 * \param entry Address entry field.
 * \param move_focus Move focus to the next widget ?
 */
static void completion_window_apply_selection(GtkTreeView *list_view,
                                                GtkEntry *entry,
                                                gboolean move_focus)
{
        gchar *address = NULL, *text = NULL;
        gint   cursor_pos;
        GtkWidget *parent;
        GtkTreeSelection *selection;
        GtkTreeModel *model;
        GtkTreeIter iter;
        gboolean is_group = FALSE;
        cm_return_if_fail(list_view != NULL);
        cm_return_if_fail(entry != NULL);
        GList *grp_emails = NULL;

        selection = gtk_tree_view_get_selection(list_view);
        if (!gtk_tree_selection_get_selected(selection, &model, &iter))
                return;

        /* First remove the idler */
        if( _completionIdleID_ != 0 ) {
                g_source_remove( _completionIdleID_ );
                _completionIdleID_ = 0;
        }

        /* Process selected item */
        gtk_tree_model_get(model, &iter, ADDR_COMPL_ADDRESS, &text, 
                                ADDR_COMPL_ISGROUP, &is_group, 
                                ADDR_COMPL_GROUPLIST, &grp_emails,
                                -1);

        address = get_address_from_edit(entry, &cursor_pos);
        g_free(address);
        replace_address_in_edit(entry, text, cursor_pos, is_group, grp_emails);
        g_free(text);

        /* Move focus to next widget */
        parent = gtk_widget_get_parent(GTK_WIDGET(entry));
        if( parent && move_focus) {
                gtk_widget_child_focus( parent, GTK_DIR_TAB_FORWARD );
        }
}

/**
 * Start address completion. Should be called when creating the main window
 * containing address completion entries.
 * \param mainwindow Main window.
 */
void address_completion_start(GtkWidget *mainwindow)
{
        start_address_completion(NULL);
        set_match_any_part(TRUE);

        /* register focus change hook */
        g_signal_connect(G_OBJECT(mainwindow), "set_focus",
                         G_CALLBACK(address_completion_mainwindow_set_focus),
                         mainwindow);
}

/**
 * Need unique data to make unregistering signal handler possible for the auto
 * completed entry.
 */
#define COMPLETION_UNIQUE_DATA (GINT_TO_POINTER(0xfeefaa))

/**
 * Register specified entry widget for address completion.
 * \param entry Address entry field.
 */
void address_completion_register_entry(GtkEntry *entry, gboolean allow_commas)
{
        cm_return_if_fail(entry != NULL);
        cm_return_if_fail(GTK_IS_ENTRY(entry));

        /* add hooked property */
        g_object_set_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK, entry);
        g_object_set_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS, GINT_TO_POINTER(allow_commas));

        /* add keypress event */
        g_signal_connect_closure
                (G_OBJECT(entry), "key_press_event",
                 g_cclosure_new(G_CALLBACK(address_completion_entry_key_pressed),
                                COMPLETION_UNIQUE_DATA,
                                NULL),
                 FALSE); /* magic */
}

/**
 * Unregister specified entry widget from address completion operations.
 * \param entry Address entry field.
 */
void address_completion_unregister_entry(GtkEntry *entry)
{
        GObject *entry_obj;

        cm_return_if_fail(entry != NULL);
        cm_return_if_fail(GTK_IS_ENTRY(entry));

        entry_obj = g_object_get_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK);
        cm_return_if_fail(entry_obj);
        cm_return_if_fail(G_OBJECT(entry_obj) == G_OBJECT(entry));

        /* has the hooked property? */
        g_object_set_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK, NULL);

        /* remove the hook */
        g_signal_handlers_disconnect_by_func(G_OBJECT(entry), 
                        G_CALLBACK(address_completion_entry_key_pressed),
                        COMPLETION_UNIQUE_DATA);
}

/**
 * End address completion. Should be called when main window with address
 * completion entries terminates. NOTE: this function assumes that it is
 * called upon destruction of the window.
 * \param mainwindow Main window.
 */
void address_completion_end(GtkWidget *mainwindow)
{
        /* if address_completion_end() is really called on closing the window,
         * we don't need to unregister the set_focus_cb */
        end_address_completion();
}

/* if focus changes to another entry, then clear completion cache */
static void address_completion_mainwindow_set_focus(GtkWindow *window,
                                                    GtkWidget *widget,
                                                    gpointer   data)
{
        
        if (widget && GTK_IS_ENTRY(widget) &&
            g_object_get_data(G_OBJECT(widget), ENTRY_DATA_TAB_HOOK)) {
                _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), ENTRY_DATA_ALLOW_COMMAS));
                clear_completion_cache();
        }
}

/**
 * Listener that watches for tab or other keystroke in address entry field.
 * \param entry Address entry field.
 * \param ev    Event object.
 * \param data  User data.
 * \return <i>TRUE</i>.
 */
static gboolean address_completion_entry_key_pressed(GtkEntry    *entry,
                                                     GdkEventKey *ev,
                                                     gpointer     data)
{
        if (ev->keyval == GDK_KEY_Tab) {
                addrcompl_clear_queue();
                _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS));
                if( address_completion_complete_address_in_entry( entry, TRUE ) ) {
                        /* route a void character to the default handler */
                        /* this is a dirty hack; we're actually changing a key
                         * reported by the system. */
                        ev->keyval = GDK_KEY_AudibleBell_Enable;
                        ev->state &= ~GDK_SHIFT_MASK;

                        /* Create window */                     
                        address_completion_create_completion_window(entry);

                        /* Start remote queries */
                        addrcompl_start_search();

                        return TRUE;
                }
                else {
                        /* old behaviour */
                }
        } else if (ev->keyval == GDK_KEY_Shift_L
                || ev->keyval == GDK_KEY_Shift_R
                || ev->keyval == GDK_KEY_Control_L
                || ev->keyval == GDK_KEY_Control_R
                || ev->keyval == GDK_KEY_Caps_Lock
                || ev->keyval == GDK_KEY_Shift_Lock
                || ev->keyval == GDK_KEY_Meta_L
                || ev->keyval == GDK_KEY_Meta_R
                || ev->keyval == GDK_KEY_Alt_L
                || ev->keyval == GDK_KEY_Alt_R) {
                /* these buttons should not clear the cache... */
        } else
                clear_completion_cache();

        return FALSE;
}
/**
 * Initialize search term for address completion.
 * \param entry Address entry field.
 */
static gboolean address_completion_complete_address_in_entry(GtkEntry *entry,
                                                             gboolean  next)
{
        gint ncount, cursor_pos;
        gchar *searchTerm, *new = NULL;

        cm_return_val_if_fail(entry != NULL, FALSE);

        if (!gtk_widget_has_focus(GTK_WIDGET(entry))) return FALSE;

        /* get an address component from the cursor */
        searchTerm = get_address_from_edit( entry, &cursor_pos );
        if( ! searchTerm ) return FALSE;
        /* g_print( "search for :::%s:::\n", searchTerm ); */

        /* Clear any existing search */
        g_free( _compWindow_->searchTerm );
        _compWindow_->searchTerm = g_strdup( searchTerm );

        /* Perform search on local completion index */
        ncount = complete_address( searchTerm );
        if( 0 < ncount ) {
                new = get_next_complete_address();
                g_free( new );
        }
#if (!defined(USE_LDAP) && !defined(GENERIC_UMPC))
        /* Select the address if there is only one match */
        if (ncount == 2) {
                /* Display selected address in entry field */           
                gchar *addr = get_complete_address(1);
                if (addr && !strstr(addr, " <!--___group___-->")) {
                        replace_address_in_edit(entry, addr, cursor_pos, FALSE, NULL);
                        /* Discard the window */
                        clear_completion_cache();
                } 
                g_free(addr);
        }
        /* Make sure that drop-down appears uniform! */
        else 
#endif
        if( ncount == 0 ) {
                addrcompl_add_queue( searchTerm );
        } else {
                g_free( searchTerm );
        }

        return TRUE;
}

/**
 * Create new address completion window for specified entry.
 * \param entry_ Entry widget to associate with window.
 */
static void address_completion_create_completion_window( GtkEntry *entry_ )
{
        gint x, y, height, width, depth;
        GtkWidget *scroll, *list_view;
        GdkGrabStatus status;
        GtkRequisition r;
        GtkWidget *window;
        GtkWidget *entry = GTK_WIDGET(entry_);
        GdkWindow *gdkwin;

        /* Create new window and list */
        window = gtk_window_new(GTK_WINDOW_POPUP);
        list_view  = addr_compl_list_view_create(_compWindow_);

        /* Destroy any existing window */
        addrcompl_destroy_window( _compWindow_ );

        /* Create new object */
        _compWindow_->window    = window;
        _compWindow_->entry     = entry;
        _compWindow_->list_view = list_view;
        _compWindow_->listCount = 0;
        _compWindow_->in_mouse  = FALSE;

        scroll = gtk_scrolled_window_new(NULL, NULL);
        gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
                                       GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
        gtk_container_add(GTK_CONTAINER(window), scroll);
        gtk_container_add(GTK_CONTAINER(scroll), list_view);
        gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
                GTK_SHADOW_OUT);
        /* Use entry widget to create initial window */
        gdkwin = gtk_widget_get_window(entry),
        gdk_window_get_geometry(gdkwin, &x, &y, &width, &height, &depth);
        gdk_window_get_origin (gdkwin, &x, &y);
        y += height;
        gtk_window_move(GTK_WINDOW(window), x, y);

        /* Resize window to fit initial (empty) address list */
        gtk_widget_size_request( list_view, &r );
        gtk_widget_set_size_request( window, width, r.height );
        gtk_widget_show_all( window );
        gtk_widget_size_request( list_view, &r );

        /* Setup handlers */
        g_signal_connect(G_OBJECT(list_view), "button_press_event",
                         G_CALLBACK(list_view_button_press),
                         _compWindow_);
                         
        g_signal_connect(G_OBJECT(list_view), "button_release_event",
                         G_CALLBACK(list_view_button_release),
                         _compWindow_);
        
        g_signal_connect(G_OBJECT(window),
                         "button-press-event",
                         G_CALLBACK(completion_window_button_press),
                         _compWindow_ );
        g_signal_connect(G_OBJECT(window),
                         "key-press-event",
                         G_CALLBACK(completion_window_key_press),
                         _compWindow_ );
        gdk_pointer_grab(gtk_widget_get_window(window), TRUE,
                         GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
                         GDK_BUTTON_RELEASE_MASK,
                         NULL, NULL, GDK_CURRENT_TIME);
        status = gdk_keyboard_grab(gtk_widget_get_window(window), FALSE, GDK_CURRENT_TIME);
        if (status != GDK_GRAB_SUCCESS)
                g_warning("gdk_keyboard_grab failed with status %d", status);
        gtk_grab_add( window );
}

/**
 * Respond to button press in completion window. Check if mouse click is
 * anywhere outside the completion window. In that case the completion
 * window is destroyed, and the original searchTerm is restored.
 *
 * \param widget   Window object.
 * \param event    Event.
 * \param compWin  Reference to completion window.
 */
static gboolean completion_window_button_press(GtkWidget *widget,
                                               GdkEventButton *event,
                                               CompletionWindow *compWin )
{
        GtkWidget *event_widget, *entry;
        gchar *searchTerm;
        gint cursor_pos;
        gboolean restore = TRUE;

        cm_return_val_if_fail(compWin != NULL, FALSE);

        entry = compWin->entry;
        cm_return_val_if_fail(entry != NULL, FALSE);

        /* Test where mouse was clicked */
        event_widget = gtk_get_event_widget((GdkEvent *)event);
        if (event_widget != widget) {
                while (event_widget) {
                        if (event_widget == widget)
                                return FALSE;
                        else if (event_widget == entry) {
                                restore = FALSE;
                                break;
                        }
                        event_widget = gtk_widget_get_parent(event_widget);
                }
        }

        if (restore) {
                /* Clicked outside of completion window - restore */
                searchTerm = _compWindow_->searchTerm;
                g_free(get_address_from_edit(GTK_ENTRY(entry), &cursor_pos));
                replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos, FALSE, NULL);
        }

        clear_completion_cache();
        addrcompl_destroy_window( _compWindow_ );

        return TRUE;
}

/**
 * Respond to key press in completion window.
 * \param widget   Window object.
 * \param event    Event.
 * \param compWind Reference to completion window.
 */
static gboolean completion_window_key_press(GtkWidget *widget,
                                            GdkEventKey *event,
                                            CompletionWindow *compWin )
{
        GdkEventKey tmp_event;
        GtkWidget *entry;
        gchar *searchTerm;
        gint cursor_pos;
        GtkWidget *list_view;
        GtkWidget *parent;
        cm_return_val_if_fail(compWin != NULL, FALSE);

        entry = compWin->entry;
        list_view = compWin->list_view;
        cm_return_val_if_fail(entry != NULL, FALSE);

        /* allow keyboard navigation in the alternatives tree view */
        if (event->keyval == GDK_KEY_Up || event->keyval == GDK_KEY_Down ||
            event->keyval == GDK_KEY_Page_Up || event->keyval == GDK_KEY_Page_Down) {
                completion_window_advance_selection
                        (GTK_TREE_VIEW(list_view),
                         event->keyval == GDK_KEY_Down ||
                         event->keyval == GDK_KEY_Page_Down ? TRUE : FALSE);
                return TRUE;
        }               

        /* make tab move to next field */
        if( event->keyval == GDK_KEY_Tab ) {
                /* Reference to parent */
                parent = gtk_widget_get_parent(GTK_WIDGET(entry));

                /* Discard the window */
                clear_completion_cache();
                addrcompl_destroy_window( _compWindow_ );

                /* Move focus to next widget */
                if( parent ) {
                        gtk_widget_child_focus( parent, GTK_DIR_TAB_FORWARD );
                }
                return FALSE;
        }

        /* make backtab move to previous field */
        if( event->keyval == GDK_KEY_ISO_Left_Tab ) {
                /* Reference to parent */
                parent = gtk_widget_get_parent(GTK_WIDGET(entry));

                /* Discard the window */
                clear_completion_cache();
                addrcompl_destroy_window( _compWindow_ );

                /* Move focus to previous widget */
                if( parent ) {
                        gtk_widget_child_focus( parent, GTK_DIR_TAB_BACKWARD );
                }
                return FALSE;
        }
        _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS));

        /* look for presses that accept the selection */
        if (event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_space ||
                        event->keyval == GDK_KEY_KP_Enter ||
                        (_allowCommas_ && event->keyval == GDK_KEY_comma)) {
                /* User selected address with a key press */

                /* Display selected address in entry field */           
                completion_window_apply_selection(
                        GTK_TREE_VIEW(list_view), GTK_ENTRY(entry),
                        event->keyval != GDK_KEY_comma);

                if (event->keyval == GDK_KEY_comma) {
                        gint pos = gtk_editable_get_position(GTK_EDITABLE(entry));
                        gtk_editable_insert_text(GTK_EDITABLE(entry), ", ", 2, &pos);
                        gtk_editable_set_position(GTK_EDITABLE(entry), pos + 1);
                }

                /* Discard the window */
                clear_completion_cache();
                addrcompl_destroy_window( _compWindow_ );
                return FALSE;
        }

        /* key state keys should never be handled */
        if (event->keyval == GDK_KEY_Shift_L
                 || event->keyval == GDK_KEY_Shift_R
                 || event->keyval == GDK_KEY_Control_L
                 || event->keyval == GDK_KEY_Control_R
                 || event->keyval == GDK_KEY_Caps_Lock
                 || event->keyval == GDK_KEY_Shift_Lock
                 || event->keyval == GDK_KEY_Meta_L
                 || event->keyval == GDK_KEY_Meta_R
                 || event->keyval == GDK_KEY_Alt_L
                 || event->keyval == GDK_KEY_Alt_R) {
                return FALSE;
        }

        /* some other key, let's restore the searchTerm (orignal text) */
        searchTerm = _compWindow_->searchTerm;
        g_free(get_address_from_edit(GTK_ENTRY(entry), &cursor_pos));
        replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos, FALSE, NULL);

        /* make sure anything we typed comes in the edit box */
        tmp_event.type       = event->type;
        tmp_event.window     = gtk_widget_get_window(GTK_WIDGET(entry));
        tmp_event.send_event = TRUE;
        tmp_event.time       = event->time;
        tmp_event.state      = event->state;
        tmp_event.keyval     = event->keyval;
        tmp_event.length     = event->length;
        tmp_event.string     = event->string;
        gtk_widget_event(entry, (GdkEvent *)&tmp_event);

        /* and close the completion window */
        clear_completion_cache();
        addrcompl_destroy_window( _compWindow_ );

        return TRUE;
}

/*
 * ============================================================================
 * Publically accessible functions.
 * ============================================================================
 */

/**
 * Setup completion object.
 */
void addrcompl_initialize( void ) {
        /* g_print( "addrcompl_initialize...\n" ); */
        if( ! _compWindow_ ) {
                _compWindow_ = addrcompl_create_window();
        }
        _queryID_ = 0;
        _completionIdleID_ = 0;
        /* g_print( "addrcompl_initialize...done\n" ); */
}

/**
 * Teardown completion object.
 */
void addrcompl_teardown( void ) {
        /* g_print( "addrcompl_teardown...\n" ); */
        addrcompl_free_window( _compWindow_ );
        _compWindow_ = NULL;

        addrcompl_clear_queue();

        _completionIdleID_ = 0;
        /* g_print( "addrcompl_teardown...done\n" ); */
}

/*
 * tree view functions
 */

static GtkListStore *addr_compl_create_store(void)
{
        return gtk_list_store_new(N_ADDR_COMPL_COLUMNS,
                                  GDK_TYPE_PIXBUF,
                                  G_TYPE_STRING,
                                  G_TYPE_BOOLEAN,
                                  G_TYPE_POINTER,
                                  -1);
}
                                             
static GtkWidget *addr_compl_list_view_create(CompletionWindow *window)
{
        GtkTreeView *list_view;
        GtkTreeSelection *selector;
        GtkTreeModel *model;

        model = GTK_TREE_MODEL(addr_compl_create_store());
        list_view = GTK_TREE_VIEW(gtk_tree_view_new_with_model(model));
        g_object_unref(model);  
        
        gtk_tree_view_set_rules_hint(list_view, prefs_common.use_stripes_everywhere);
        gtk_tree_view_set_headers_visible(list_view, FALSE);
        
        selector = gtk_tree_view_get_selection(list_view);
        gtk_tree_selection_set_mode(selector, GTK_SELECTION_BROWSE);
        gtk_tree_selection_set_select_function(selector, addr_compl_selected,
                                               window, NULL);

        /* create the columns */
        addr_compl_create_list_view_columns(GTK_WIDGET(list_view));

        return GTK_WIDGET(list_view);
}

static void addr_compl_create_list_view_columns(GtkWidget *list_view)
{
        GtkTreeViewColumn *column;
        GtkCellRenderer *renderer;

        renderer = gtk_cell_renderer_pixbuf_new();
        column = gtk_tree_view_column_new_with_attributes
                ("", renderer,
                 "pixbuf", ADDR_COMPL_ICON, NULL);
        gtk_tree_view_append_column(GTK_TREE_VIEW(list_view), column);          
        renderer = gtk_cell_renderer_text_new();
        column = gtk_tree_view_column_new_with_attributes
                ("", renderer, "text", ADDR_COMPL_ADDRESS, NULL);
        gtk_tree_view_append_column(GTK_TREE_VIEW(list_view), column);          
}

static gboolean list_view_button_press(GtkWidget *widget, GdkEventButton *event,
                                       CompletionWindow *window)
{
        if (window && event && event->type == GDK_BUTTON_PRESS) {
                window->in_mouse = TRUE;
        }
        return FALSE;
}

static gboolean list_view_button_release(GtkWidget *widget, GdkEventButton *event,
                                         CompletionWindow *window)
{
        if (window && event && event->type == GDK_BUTTON_RELEASE) {
                window->in_mouse = FALSE;
        }
        return FALSE;
}

static gboolean addr_compl_selected(GtkTreeSelection *selector,
                                    GtkTreeModel *model, 
                                    GtkTreePath *path,
                                    gboolean currently_selected,
                                    gpointer data)
{
        CompletionWindow *window = data;

        if (currently_selected)
                return TRUE;
        
        if (!window->in_mouse)
                return TRUE;

        /* XXX: select the entry and kill window later... select is called before
         * any other mouse events handlers including the tree view internal one;
         * not using a time out would result in a crash. if this doesn't work
         * safely, maybe we should set variables when receiving button presses
         * in the tree view. */
        if (!window->destroying) {
                window->destroying = TRUE;
                g_idle_add((GSourceFunc) addr_compl_defer_select_destruct, data);
        }

        return TRUE;
}

static gboolean addr_compl_defer_select_destruct(CompletionWindow *window)
{
        GtkEntry *entry = GTK_ENTRY(window->entry);

        completion_window_apply_selection(GTK_TREE_VIEW(window->list_view), 
                                          entry, TRUE);

        clear_completion_cache();

        addrcompl_destroy_window(window);
        return FALSE;
}

gboolean found_in_addressbook(const gchar *address)
{
        gchar *addr = NULL;
        gboolean found = FALSE;
        gint num_addr = 0;

        if (!address)
                return FALSE;

        addr = g_strdup(address);
        extract_address(addr);
        num_addr = complete_address(addr);
        if (num_addr > 1) {
                /* skip first item (this is the search string itself) */
                int i = 1;
                for (; i < num_addr && !found; i++) {
                        gchar *caddr = get_complete_address(i);
                        extract_address(caddr);
                        if (strcasecmp(caddr, addr) == 0)
                                found = TRUE;
                        g_free(caddr);
                }
        }
        g_free(addr);
        return found;
}

/*
 * End of Source.
 */