* src/addr_compl.c
[claws.git] / src / addr_compl.c
index 7aea906daa35e7851b4f078e21bfce21babd4cfa..2260a7802e5d0ee03714c8f0ca8a928164564c43 100644 (file)
@@ -1,7 +1,7 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
  *
- * Copyright (c) 2000-2001 by Alfons Hoogervorst <alfons@proteus.demon.nl>
+ * Copyright (C) 2000-2004 by Alfons Hoogervorst & The Sylpheed Claws 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
 #  include <wctype.h>
 #endif
 
-#include "xml.h"
+#include "addrindex.h"
 #include "addr_compl.h"
 #include "utils.h"
-#include "addressbook.h"
-#include "main.h"
+#include <pthread.h>
 
-#define LOG_MESSAGE \
-       debug_mode == 0 ? (debug_mode == debug_mode) : debug_print 
-
-/* How it works:
+/*
+ * 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
@@ -66,8 +63,9 @@
  * any of those words).
  */ 
        
-/* address_entry - structure which refers to the original address entry in the
- * address book 
+/**
+ * address_entry - structure which refers to the original address entry in the
+ * address book .
  */
 typedef struct
 {
@@ -75,7 +73,8 @@ typedef struct
        gchar *address;
 } address_entry;
 
-/* completion_entry - structure used to complete addresses, with a reference
+/**
+ * completion_entry - structure used to complete addresses, with a reference
  * the the real address information.
  */
 typedef struct
@@ -104,8 +103,9 @@ static gchar           *g_completion_prefix;        /* last prefix. (this is cached here
 
 /*******************************************************************************/
 
-/* completion_func() - used by GTK to find the string data to be used for 
- * completion 
+/**
+ * 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)
 {
@@ -114,12 +114,18 @@ static gchar *completion_func(gpointer data)
        return ((completion_entry *)data)->string;
 } 
 
+/**
+ * Initialize all completion index data.
+ */
 static void init_all(void)
 {
        g_completion = g_completion_new(completion_func);
        g_return_if_fail(g_completion != NULL);
 }
 
+/**
+ * Free up all completion index data.
+ */
 static void free_all(void)
 {
        GList *walk;
@@ -147,103 +153,96 @@ static void free_all(void)
        g_completion = NULL;
 }
 
-/* add_address() - adds address to the completion list. this function looks
- * complicated, but it's only allocation checks.
+/**
+ * Append specified address entry to the index.
+ * \param str Index string value.
+ * \param ae  Entry containing address data.
  */
-static gint add_address(const gchar *name, const gchar *address)
+static void add_address1(const char *str, address_entry *ae)
 {
-       address_entry    *ae;
        completion_entry *ce1;
-       completion_entry *ce2;
+       ce1 = g_new0(completion_entry, 1),
+       ce1->string = g_strdup(str);
+       /* GCompletion list is case sensitive */
+       g_strdown(ce1->string);
+       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.
+ * \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 *alias)
+{
+       address_entry    *ae;
 
        if (!name || !address) return -1;
 
        ae = g_new0(address_entry, 1);
-       ce1 = g_new0(completion_entry, 1),
-       ce2 = g_new0(completion_entry, 1);
 
        g_return_val_if_fail(ae != NULL, -1);
-       g_return_val_if_fail(ce1 != NULL && ce2 != NULL, -1);   
 
        ae->name    = g_strdup(name);
        ae->address = g_strdup(address);                
-       ce1->string = g_strdup(name);
-       ce2->string = g_strdup(address);
 
-       /* GCompletion list is case sensitive */
-       g_strdown(ce2->string);
-       g_strdown(ce1->string);
-       ce1->ref = ce2->ref = ae;
+       g_address_list = g_list_prepend(g_address_list, ae);
 
-       g_completion_list = g_list_append(g_completion_list, ce1);
-       g_completion_list = g_list_append(g_completion_list, ce2);
-       g_address_list    = g_list_append(g_address_list,    ae);
+       add_address1(name, ae);
+       add_address1(address, ae);
+       add_address1(alias, ae);
 
        return 0;
 }
 
-static gboolean get_all_addresses(GNode *node, gpointer ae)
-{
-       XMLNode *xmlnode = (XMLNode *)node->data;
-       address_entry *addr = (address_entry *)ae;
-
-       /* this simply checks if tag is "item". in that case, it
-        * verifies it has already seen an item. if it did, an
-        * address retrieval was complete */
-       if (!strcmp(xmlnode->tag->tag, "item")) {
-               /* see if a previous item was complete */
-               /* TODO: does sylpheed address book allow empty names to be entered?
-                * if so, addr->name *AND* addr->address should be checked. */
-               /* add address to our database */
-               add_address(addr->name, addr->address);
-               g_free(addr->name);
-               g_free(addr->address);
-               addr->name = NULL;
-               addr->address = NULL;
-       } else if (!strcmp(xmlnode->tag->tag, "name"))
-               addr->name = g_strdup(xmlnode->element);
-       else if (!strcmp(xmlnode->tag->tag, "address"))
-               addr->address = g_strdup(xmlnode->element);
-
-       return FALSE;
+/**
+ * Read address book, creating all entries in the completion index.
+ */ 
+static void read_address_book(void) {  
+       addrindex_load_completion( add_address );
+       g_address_list = g_list_reverse(g_address_list);
+       g_completion_list = g_list_reverse(g_completion_list);
 }
 
-/* read_address_book()
- */ 
-static void read_address_book(void)
-{      
-       gchar *path;
-       GNode *tree; 
-       address_entry ad = {NULL, NULL};
-
-       LOG_MESSAGE( _("%s%d entering read_address_book\n"), __FILE__, __LINE__);
-       path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, ADDRESS_BOOK, NULL);
-       tree = xml_parse_file(path);
-       g_free(path);
-       if (!tree) {
-               LOG_MESSAGE( _("%s(%d) no addressbook\n"), __FILE__, __LINE__);
-               return;
-       }
+/**
+ * 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;
+}
 
-       /* retrieve all addresses */
-       g_node_traverse(tree, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
-                       (GNodeTraverseFunc) get_all_addresses, &ad);
-       /* still one pending? */
-       if (ad.name) {
-               add_address(ad.name, ad.address);
-               if (ad.name)
-                       g_free(ad.name);
-               if (ad.address)
-                       g_free(ad.address);
-       }
+/**
+ * Clear the completion cache.
+ */
+static void clear_completion_cache(void)
+{
+       if (is_completion_pending()) {
+               if (g_completion_prefix)
+                       g_free(g_completion_prefix);
 
-       xml_free_tree(tree);
+               if (g_completion_addresses) {
+                       g_slist_free(g_completion_addresses);
+                       g_completion_addresses = NULL;
+               }
 
-       LOG_MESSAGE(_("%s(%d) leaving read_address_book - OK\n"), __FILE__, __LINE__);
+               g_completion_count = g_completion_next = 0;
+       }
 }
 
-/* start_address_completion() - returns the number of addresses 
- * that should be matched for completion.
+/**
+ * Prepare completion index. This function should be called prior to attempting
+ * address completion.
+ * \return The number of addresses in the completion list.
  */
 gint start_address_completion(void)
 {
@@ -257,25 +256,39 @@ gint start_address_completion(void)
                        g_completion_add_items(g_completion, g_completion_list);
        }
        g_ref_count++;
-       LOG_MESSAGE("start_address_completion ref count %d\n", g_ref_count);
+       debug_print("start_address_completion ref count %d\n", g_ref_count);
 
        return g_list_length(g_completion_list);
 }
 
-/* get_address_from_edit() - returns 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. 
- */ 
-gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
+/**
+ * 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;
        gint cur_pos;
        wchar_t *wtext;
        wchar_t *wp;
        wchar_t rfc_mail_sep;
+       wchar_t quote;
+       wchar_t lt;
+       wchar_t gt;
+       gboolean in_quote = FALSE;
+       gboolean in_bracket = FALSE;
        gchar *str;
 
+       if (mbtowc(&rfc_mail_sep, ",", 1) < 0) return NULL;
+       if (mbtowc(&quote, "\"", 1) < 0) return NULL;
+       if (mbtowc(&lt, "<", 1) < 0) return NULL;
+       if (mbtowc(&gt, ">", 1) < 0) return NULL;
+
        edit_text = gtk_entry_get_text(entry);
        if (edit_text == NULL) return NULL;
 
@@ -284,14 +297,19 @@ gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
 
        cur_pos = gtk_editable_get_position(GTK_EDITABLE(entry));
 
-       if (mbtowc(&rfc_mail_sep, ",", 1) < 0) {
-               g_free(wtext);
-               return NULL;
-       }
-
        /* scan for a separator. doesn't matter if walk points at null byte. */
-       for (wp = wtext + cur_pos; wp > wtext && *wp != rfc_mail_sep; wp--)
-               ;
+       for (wp = wtext + cur_pos; wp > wtext; wp--) {
+               if (*wp == quote)
+                       in_quote ^= TRUE;
+               else if (!in_quote) {
+                       if (!in_bracket && *wp == rfc_mail_sep)
+                               break;
+                       else if (*wp == gt)
+                               in_bracket = TRUE;
+                       else if (*wp == lt)
+                               in_bracket = FALSE;
+               }
+       }
 
        /* have something valid */
        if (wcslen(wp) == 0) {
@@ -299,7 +317,8 @@ gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
                return NULL;
        }
 
-#define IS_VALID_CHAR(x)       (iswalnum(x) || ((x) > 0x7f))
+#define IS_VALID_CHAR(x) \
+       (iswalnum(x) || (x) == quote || (x) == lt || ((x) > 0x7f))
 
        /* now scan back until we hit a valid character */
        for (; *wp && !IS_VALID_CHAR(*wp); wp++)
@@ -320,21 +339,29 @@ gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
        return str;
 } 
 
-/* replace_address_in_edit() - replaces an incompleted address with a completed one.
+/**
+ * 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.
  */
-void replace_address_in_edit(GtkEntry *entry, const gchar *newtext,
+static void replace_address_in_edit(GtkEntry *entry, const gchar *newtext,
                             gint start_pos)
 {
+       if (!newtext) return;
        gtk_editable_delete_text(GTK_EDITABLE(entry), start_pos, -1);
        gtk_editable_insert_text(GTK_EDITABLE(entry), newtext, strlen(newtext),
                                 &start_pos);
        gtk_editable_set_position(GTK_EDITABLE(entry), -1);
 }
 
-/* complete_address() - tries to complete an addres, and returns the
- * number of addresses found. use get_complete_address() to get one.
- * returns zero if no match was found, otherwise the number of addresses,
- * with the original prefix at index 0. 
+/**
+ * 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)
 {
@@ -380,31 +407,45 @@ guint complete_address(const gchar *str)
        return count;
 }
 
-/* get_complete_address() - returns a complete address. the returned
- * string should be freed 
+/**
+ * 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)
-                       return g_strdup(g_completion_prefix);
+                       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)
-                               return NULL;
-                       else
-                               return g_strdup_printf
-                                       ("%s <%s>", p->name, p->address);
+                       if (p != NULL) {
+                               if (!p->name || p->name[0] == '\0')
+                                       address = g_strdup_printf(p->address);
+                               else if (strchr_with_skip_quote(p->name, '"', ','))
+                                       address = g_strdup_printf
+                                               ("\"%s\" <%s>", p->name, p->address);
+                               else
+                                       address = g_strdup_printf
+                                               ("%s <%s>", p->name, p->address);
+                       }
                }
-       } else
-               return NULL;
+       }
+
+       return address;
 }
 
-gchar *get_next_complete_address(void)
+/**
+ * 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;
@@ -419,24 +460,11 @@ gchar *get_next_complete_address(void)
                return NULL;
 }
 
-gchar *get_prev_complete_address(void)
-{
-       if (is_completion_pending()) {
-               int n = g_completion_next - 2;
-
-               /* real previous */
-               n = (n + (g_completion_count * 5)) % g_completion_count;
-
-               /* real next */
-               g_completion_next = n + 1;
-               if (g_completion_next >=  g_completion_count)
-                       g_completion_next = 0;
-               return get_complete_address(n);
-       } else
-               return NULL;
-}
-
-guint get_completion_count(void)
+/**
+ * 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;
@@ -444,37 +472,17 @@ guint get_completion_count(void)
                return 0;
 }
 
-/* should clear up anything after complete_address() */
-void clear_completion_cache(void)
-{
-       if (is_completion_pending()) {
-               if (g_completion_prefix)
-                       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;
-       }
-}
-
-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;
-}
-
-/* invalidate_address_completion() - should be called if address book
- * changed; 
+/**
+ * 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() */
-               LOG_MESSAGE("Invalidation request for address completion\n");
+               debug_print("Invalidation request for address completion\n");
                free_all();
                init_all();
                read_address_book();
@@ -485,6 +493,11 @@ gint invalidate_address_completion(void)
        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)
 {
        clear_completion_cache();
@@ -492,19 +505,54 @@ gint end_address_completion(void)
        if (0 == --g_ref_count)
                free_all();
 
-       LOG_MESSAGE("end_address_completion ref count %d\n", g_ref_count);
+       debug_print("end_address_completion ref count %d\n", g_ref_count);
 
        return g_ref_count; 
 }
 
+/*
+ * Define the structure of the completion window.
+ */
+typedef struct _CompletionWindow CompletionWindow;
+struct _CompletionWindow {
+       gint      listCount;
+       gchar     *searchTerm;
+       GtkWidget *window;
+       GtkWidget *entry;
+       GtkWidget *clist;
+};
 
-/* address completion entry ui. the ui (completion list was inspired by galeon's
+/**
+ * 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 sylpheed's completion engine.
  */
 
-#define ENTRY_DATA_TAB_HOOK    "tab_hook"                      /* used to lookup entry */
-#define WINDOW_DATA_COMPL_ENTRY        "compl_entry"   /* used to store entry for compl. window */
-#define WINDOW_DATA_COMPL_CLIST "compl_clist"  /* used to store clist for compl. window */
+#define ENTRY_DATA_TAB_HOOK    "tab_hook"      /* used to lookup entry */
 
 static void address_completion_mainwindow_set_focus    (GtkWindow   *window,
                                                         GtkWidget   *widget,
@@ -521,40 +569,106 @@ static void completion_window_select_row(GtkCList         *clist,
                                         gint             row,
                                         gint             col,
                                         GdkEvent        *event,
-                                        GtkWidget      **completion_window);
+                                        CompletionWindow *compWin );
+
 static gboolean completion_window_button_press
                                        (GtkWidget       *widget,
                                         GdkEventButton  *event,
-                                        GtkWidget      **completion_window);
+                                        CompletionWindow *compWin );
+
 static gboolean completion_window_key_press
                                        (GtkWidget       *widget,
                                         GdkEventKey     *event,
-                                        GtkWidget      **completion_window);
+                                        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;
 
-static void completion_window_advance_to_row(GtkCList *clist, gint row)
-{
-       g_return_if_fail(row < g_completion_count);
-       gtk_clist_select_row(clist, row, 0);
+       cw = g_new0( CompletionWindow, 1 );
+       cw->listCount = 0;
+       cw->searchTerm = NULL;
+       cw->window = NULL;
+       cw->entry = NULL;
+       cw->clist = NULL;
+
+       return cw;      
+}
+
+/**
+ * Destroy completion window.
+ * \param cw Window to destroy.
+ */
+static void addrcompl_destroy_window( CompletionWindow *cw ) {
+       /* Stop all searches currently in progress */
+       addrindex_stop_search( _queryID_ );
+
+       /* Remove idler function... or application may not terminate */
+       if( _completionIdleID_ != 0 ) {
+               gtk_idle_remove( _completionIdleID_ );
+               _completionIdleID_ = 0;
+       }
+
+       /* Now destroy window */        
+       if( cw ) {
+               /* Clear references to widgets */
+               cw->entry = NULL;
+               cw->clist = NULL;
+
+               /* Free objects */
+               if( cw->window ) {
+                       gtk_widget_hide( cw->window );
+                       gtk_widget_destroy( cw->window );
+               }
+               cw->window = NULL;
+       }
+}
+
+/**
+ * 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 clist   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(GtkCList *clist, gboolean forward)
 {
        int row;
 
        g_return_if_fail(clist != NULL);
-       g_return_if_fail(clist->selection != NULL);
-
-       row = GPOINTER_TO_INT(clist->selection->data);
-
-       row = forward ? (row + 1) % g_completion_count :
-                       (row - 1) < 0 ? g_completion_count - 1 : row - 1;
 
-       gtk_clist_freeze(clist);
-       completion_window_advance_to_row(clist, row);                                   
-       gtk_clist_thaw(clist);
+       if( clist->selection ) {
+               row = GPOINTER_TO_INT(clist->selection->data);
+               row = forward ? ( row + 1 ) : ( row - 1 );
+               gtk_clist_freeze(clist);
+               gtk_clist_select_row(clist, row, 0);
+               gtk_clist_thaw(clist);
+       }
 }
 
+#if 0
 /* completion_window_accept_selection() - accepts the current selection in the
  * clist, and destroys the window */
 static void completion_window_accept_selection(GtkWidget **window,
@@ -562,7 +676,7 @@ static void completion_window_accept_selection(GtkWidget **window,
                                               GtkEntry *entry)
 {
        gchar *address = NULL, *text = NULL;
-       gint   cursor_pos, row, col;
+       gint   cursor_pos, row;
 
        g_return_if_fail(window != NULL);
        g_return_if_fail(*window != NULL);
@@ -570,24 +684,244 @@ static void completion_window_accept_selection(GtkWidget **window,
        g_return_if_fail(entry != NULL);
        g_return_if_fail(clist->selection != NULL);
 
-       col = 0;
-
        /* FIXME: I believe it's acceptable to access the selection member directly  */
        row = GPOINTER_TO_INT(clist->selection->data);
 
        /* we just need the cursor position */
        address = get_address_from_edit(entry, &cursor_pos);
-       gtk_clist_get_text(clist, row, col, &text);
+       g_free(address);
+       gtk_clist_get_text(clist, row, 0, &text);
        replace_address_in_edit(entry, text, cursor_pos);
-       g_free(address);                                
 
        clear_completion_cache();
        gtk_widget_destroy(*window);
        *window = NULL;
 }
+#endif
 
-/* should be called when creating the main window containing address
- * completion entries */
+/**
+ * Resize window to accommodate maximum number of address entries.
+ * \param cw Completion window.
+ */
+static void addrcompl_resize_window( CompletionWindow *cw ) {
+       GtkRequisition r;
+       gint x, y, width, height, depth;
+
+       /* Get current geometry of window */
+       gdk_window_get_geometry( cw->window->window, &x, &y, &width, &height, &depth );
+
+       gtk_widget_size_request( cw->clist, &r );
+       gtk_widget_set_usize( cw->window, width, r.height );
+       gtk_widget_show_all( cw->window );
+       gtk_widget_size_request( cw->clist, &r );
+
+       /* Adjust window height to available screen space */
+       if( ( y + r.height ) > gdk_screen_height() ) {
+               gtk_window_set_policy( GTK_WINDOW( cw->window ), TRUE, FALSE, FALSE );
+               gtk_widget_set_usize( cw->window, width, gdk_screen_height() - y );
+       }
+}
+
+/**
+ * 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 ) {
+       gchar *text[] = { NULL, NULL };
+
+       /* printf( "\t\tAdding :%s\n", address ); */
+       text[0] = address;
+       gtk_clist_append( GTK_CLIST(cw->clist), text );
+       cw->listCount++;
+
+       /* Resize window */
+       addrcompl_resize_window( cw );
+       gtk_grab_add( cw->window );
+
+       if( cw->listCount == 1 ) {
+               /* Select first row for now */
+               gtk_clist_select_row( GTK_CLIST(cw->clist), 0, 0);
+       }
+       else if( cw->listCount == 2 ) {
+               /* Move off first row */
+               gtk_clist_select_row( GTK_CLIST(cw->clist), 1, 0);
+       }
+}
+
+/**
+ * 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;
+                       /* printf( "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_ );
+
+       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.
+ */
+static gint addrcompl_callback_entry(
+       gpointer sender, gint queryID, GList *listEMail, gpointer data )
+{
+       GList *node;
+       gchar *address;
+
+       /* printf( "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 );
+                       /* printf( "\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;
+}
+
+/**
+ * Clear the display queue.
+ */
+static void addrcompl_clear_queue( void ) {
+       /* Clear out display queue */
+       pthread_mutex_lock( & _completionMutex_ );
+
+       g_list_free( _displayQueue_ );
+       _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 );
+               /* printf( "\taddress ::%s::\n", address ); */
+
+               /* Append contents to end of display queue */
+               addrcompl_add_queue( address );
+       }
+}
+
+/**
+ * Start the search.
+ */
+static void addrcompl_start_search( void ) {
+       gchar *searchTerm;
+
+       searchTerm = g_strdup( _compWindow_->searchTerm );
+
+       /* Setup the search */
+       _queryID_ = addrindex_setup_search(
+               searchTerm, NULL, addrcompl_callback_entry );
+       g_free( searchTerm );
+       /* printf( "addrcompl_start_search::queryID=%d\n", _queryID_ ); */
+
+       /* Load local stuff */
+       addrcompl_load_local();
+
+       /* Sit back and wait until something happens */
+       _completionIdleID_ =
+               gtk_idle_add( ( GtkFunction ) addrcompl_idle, NULL );
+       /* printf( "addrindex_start_search::queryID=%d\n", _queryID_ ); */
+
+       addrindex_start_search( _queryID_ );
+}
+
+/**
+ * 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 clist List to process.
+ * \param entry Address entry field.
+ */
+static void completion_window_apply_selection(GtkCList *clist, GtkEntry *entry)
+{
+       gchar *address = NULL, *text = NULL;
+       gint   cursor_pos, row;
+       GtkWidget *parent;
+
+       g_return_if_fail(clist != NULL);
+       g_return_if_fail(entry != NULL);
+       g_return_if_fail(clist->selection != NULL);
+
+       /* First remove the idler */
+       if( _completionIdleID_ != 0 ) {
+               gtk_idle_remove( _completionIdleID_ );
+               _completionIdleID_ = 0;
+       }
+
+       /* Process selected item */
+       row = GPOINTER_TO_INT(clist->selection->data);
+
+       address = get_address_from_edit(entry, &cursor_pos);
+       g_free(address);
+       gtk_clist_get_text(clist, row, 0, &text);
+       replace_address_in_edit(entry, text, cursor_pos);
+
+       /* Move focus to next widget */
+       parent = GTK_WIDGET(entry)->parent;
+       if( parent ) {
+               gtk_container_focus( GTK_CONTAINER(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();
@@ -598,10 +932,16 @@ void address_completion_start(GtkWidget *mainwindow)
                           mainwindow);
 }
 
-/* Need unique data to make unregistering signal handler possible for the auto
- * completed entry */
+/**
+ * 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)
 {
        g_return_if_fail(entry != NULL);
@@ -620,6 +960,10 @@ void address_completion_register_entry(GtkEntry *entry)
                                0); /* magic */
 }
 
+/**
+ * Unregister specified entry widget from address completion operations.
+ * \param entry Address entry field.
+ */
 void address_completion_unregister_entry(GtkEntry *entry)
 {
        GtkObject *entry_obj;
@@ -640,10 +984,12 @@ void address_completion_unregister_entry(GtkEntry *entry)
                COMPLETION_UNIQUE_DATA);
 }
 
-/* should be called when main window with address completion entries
- * terminates.
- * NOTE: this function assumes that it is called upon destruction of
- * the window */
+/**
+ * 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,
@@ -660,15 +1006,21 @@ static void address_completion_mainwindow_set_focus(GtkWindow *window,
                clear_completion_cache();
 }
 
-/* watch for tabs in one of the address entries. if no tab then clear the
- * 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_Tab) {
-               if (address_completion_complete_address_in_entry(entry, TRUE)) {
-                       address_completion_create_completion_window(entry);
+               addrcompl_clear_queue();
+
+               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. */
@@ -676,7 +1028,14 @@ static gboolean address_completion_entry_key_pressed(GtkEntry    *entry,
                        ev->state &= ~GDK_SHIFT_MASK;
                        gtk_signal_emit_stop_by_name(GTK_OBJECT(entry),
                                                     "key_press_event");
-               } else {
+
+                       /* Create window */                     
+                       address_completion_create_completion_window(entry);
+
+                       /* Start remote queries */
+                       addrcompl_start_search();
+               }
+               else {
                        /* old behaviour */
                }
        } else if (ev->keyval == GDK_Shift_L
@@ -695,183 +1054,168 @@ static gboolean address_completion_entry_key_pressed(GtkEntry    *entry,
 
        return TRUE;
 }
-
-/* initialize the completion cache and put first completed string
- * in entry. this function used to do back cycling but this is not
- * currently used. since the address completion behaviour has been
- * changed regularly, we keep the feature in case someone changes
- * his / her mind again. :) */
+/**
+ * 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 *address, *new = NULL;
-       gboolean completed = FALSE;
+       gchar *searchTerm, *new = NULL;
 
        g_return_val_if_fail(entry != NULL, FALSE);
 
        if (!GTK_WIDGET_HAS_FOCUS(entry)) return FALSE;
 
        /* get an address component from the cursor */
-       if (0 != (address = get_address_from_edit(entry, &cursor_pos))) {
-               /* still something in the cache */
-               if (is_completion_pending()) {
-                       new = next ? get_next_complete_address() :
-                               get_prev_complete_address();
-               } else {
-                       if (0 < (ncount = complete_address(address)))
-                               new = get_next_complete_address();
-               }
+       searchTerm = get_address_from_edit( entry, &cursor_pos );
+       if( ! searchTerm ) return FALSE;
+       /* printf( "search for :::%s:::\n", searchTerm ); */
 
-               if (new) {
-                       /* prevent "change" signal */
-                       replace_address_in_edit(entry, new, cursor_pos);
-                       g_free(new);
-                       completed = TRUE;
-               }
+       /* Clear any existing search */
+       if( _compWindow_->searchTerm ) {
+               g_free( _compWindow_->searchTerm );
+       }
+       _compWindow_->searchTerm = g_strdup( searchTerm );
 
-               g_free(address);
-       }                                       
+       /* Perform search on local completion index */
+       ncount = complete_address( searchTerm );
+       if( 0 < ncount ) {
+               new = get_next_complete_address();
+               g_free( new );
+       }
+
+       /* Make sure that drop-down appears uniform! */
+       if( ncount == 0 ) {
+               addrcompl_add_queue( g_strdup( searchTerm ) );
+       }
+       g_free( searchTerm );
 
-       return completed;
+       return TRUE;
 }
 
-static void address_completion_create_completion_window(GtkEntry *entry_)
+/**
+ * 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_ )
 {
-       static GtkWidget *completion_window;
        gint x, y, height, width, depth;
        GtkWidget *scroll, *clist;
        GtkRequisition r;
-       guint count = 0;
+       GtkWidget *window;
        GtkWidget *entry = GTK_WIDGET(entry_);
 
-       if (completion_window) {
-               gtk_widget_destroy(completion_window);
-               completion_window = NULL;
-       }
-
-       scroll = gtk_scrolled_window_new(NULL, NULL);
+       /* Create new window and list */
+       window = gtk_window_new(GTK_WINDOW_POPUP);
        clist  = gtk_clist_new(1);
-       gtk_clist_set_selection_mode(GTK_CLIST(clist), GTK_SELECTION_SINGLE);
-       
-       completion_window = gtk_window_new(GTK_WINDOW_POPUP);
 
+       /* Destroy any existing window */
+       addrcompl_destroy_window( _compWindow_ );
+
+       /* Create new object */
+       _compWindow_->window = window;
+       _compWindow_->entry = entry;
+       _compWindow_->clist = clist;
+       _compWindow_->listCount = 0;
+
+       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(completion_window), scroll);
+       gtk_container_add(GTK_CONTAINER(window), scroll);
        gtk_container_add(GTK_CONTAINER(scroll), clist);
+       gtk_clist_set_selection_mode(GTK_CLIST(clist), GTK_SELECTION_SINGLE);
 
-       /* set the unique data so we can always get back the entry and
-        * clist window to which this completion window has been attached */
-       gtk_object_set_data(GTK_OBJECT(completion_window),
-                           WINDOW_DATA_COMPL_ENTRY, entry_);
-       gtk_object_set_data(GTK_OBJECT(completion_window),
-                           WINDOW_DATA_COMPL_CLIST, clist);
-
-       gtk_signal_connect(GTK_OBJECT(clist), "select_row",
-                          GTK_SIGNAL_FUNC(completion_window_select_row),
-                          &completion_window);
-
-       for (count = 0; count < get_completion_count(); count++) {
-               gchar *text[] = {NULL, NULL};
-
-               text[0] = get_complete_address(count);
-               gtk_clist_append(GTK_CLIST(clist), text);
-               g_free(text[0]);
-       }
-
+       /* Use entry widget to create initial window */
        gdk_window_get_geometry(entry->window, &x, &y, &width, &height, &depth);
        gdk_window_get_deskrelative_origin (entry->window, &x, &y);
        y += height;
-       gtk_widget_set_uposition(completion_window, x, y);
+       gtk_widget_set_uposition(window, x, y);
 
-       gtk_widget_size_request(clist, &r);
-       gtk_widget_set_usize(completion_window, width, r.height);
-       gtk_widget_show_all(completion_window);
-       gtk_widget_size_request(clist, &r);
-
-       if ((y + r.height) > gdk_screen_height()) {
-               gtk_window_set_policy(GTK_WINDOW(completion_window),
-                                     TRUE, FALSE, FALSE);
-               gtk_widget_set_usize(completion_window, width,
-                                    gdk_screen_height () - y);
-       }
+       /* Resize window to fit initial (empty) address list */
+       gtk_widget_size_request( clist, &r );
+       gtk_widget_set_usize( window, width, r.height );
+       gtk_widget_show_all( window );
+       gtk_widget_size_request( clist, &r );
 
-       gtk_signal_connect(GTK_OBJECT(completion_window),
+       /* Setup handlers */
+       gtk_signal_connect(GTK_OBJECT(clist), "select_row",
+                          GTK_SIGNAL_FUNC(completion_window_select_row),
+                          _compWindow_ );
+       gtk_signal_connect(GTK_OBJECT(window),
                           "button-press-event",
                           GTK_SIGNAL_FUNC(completion_window_button_press),
-                          &completion_window);
-       gtk_signal_connect(GTK_OBJECT(completion_window),
+                          _compWindow_ );
+       gtk_signal_connect(GTK_OBJECT(window),
                           "key-press-event",
                           GTK_SIGNAL_FUNC(completion_window_key_press),
-                          &completion_window);
-       gdk_pointer_grab(completion_window->window, TRUE,
+                          _compWindow_ );
+       gdk_pointer_grab(window->window, TRUE,
                         GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
                         GDK_BUTTON_RELEASE_MASK,
                         NULL, NULL, GDK_CURRENT_TIME);
-       gtk_grab_add(completion_window);
+       gtk_grab_add( window );
 
        /* this gets rid of the irritating focus rectangle that doesn't
         * follow the selection */
        GTK_WIDGET_UNSET_FLAGS(clist, GTK_CAN_FOCUS);
-       gtk_clist_select_row(GTK_CLIST(clist), 1, 0);
 }
 
-
-/* row selection sends completed address to entry.
- * note: event is NULL if selected by anything else than a mouse button. */
+/**
+ * Respond to select row event in clist object. selection sends completed
+ * address to entry. Note: event is NULL if selected by anything else than a
+ * mouse button.
+ * \param widget   Window object.
+ * \param event    Event.
+ * \param compWind Reference to completion window.
+ */
 static void completion_window_select_row(GtkCList *clist, gint row, gint col,
                                         GdkEvent *event,
-                                        GtkWidget **completion_window)
+                                        CompletionWindow *compWin )
 {
        GtkEntry *entry;
 
-       /* first check if it's anything but a mouse event. Mouse events
-        * accept the completion. Anything else is accepted by the
-        * completion_window_key_press() */
-       if (!event) {
-               /* event == NULL if key press did the selection or just
-                * event emitted with signal_emit_XXX(). This seems to 
-                * be the case for the gtk versions I have seen */
-               return;
-       }
+       g_return_if_fail(compWin != NULL);
+
+       entry = GTK_ENTRY(compWin->entry);
+       g_return_if_fail(entry != NULL);
 
-       /* however, a future version of GTK might pass the event type
-        * that triggered the select_row. since this event handler
-        * only wants mouse clicks, we check for that. */
-       if (event->type != GDK_BUTTON_RELEASE) {
+       /* Don't update unless user actually selects ! */
+       if (!event || event->type != GDK_BUTTON_RELEASE)
                return;
-       }
 
-       g_return_if_fail(completion_window != NULL);
-       g_return_if_fail(*completion_window != NULL);
+       /* User selected address by releasing the mouse in drop-down list*/
+       completion_window_apply_selection( clist, entry );
 
-       entry = GTK_ENTRY(gtk_object_get_data(GTK_OBJECT(*completion_window),
-                                             WINDOW_DATA_COMPL_ENTRY));
-       g_return_if_fail(entry != NULL);
-
-       completion_window_accept_selection(completion_window, clist, entry);    
+       clear_completion_cache();
+       addrcompl_destroy_window( _compWindow_ );
 }
 
-/* completion_window_button_press() - check is mouse click is anywhere
- * else (not in the completion window). in that case the completion
- * window is destroyed, and the original prefix is restored */
+/**
+ * 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,
-                                              GtkWidget **completion_window)
+                                              CompletionWindow *compWin )
 {
        GtkWidget *event_widget, *entry;
-       gchar *prefix;
+       gchar *searchTerm;
        gint cursor_pos;
        gboolean restore = TRUE;
 
-       g_return_val_if_fail(completion_window != NULL, FALSE);
-       g_return_val_if_fail(*completion_window != NULL, FALSE);
+       g_return_val_if_fail(compWin != NULL, FALSE);
 
-       entry = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(*completion_window),
-                                              WINDOW_DATA_COMPL_ENTRY));
+       entry = compWin->entry;
        g_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) {
@@ -881,40 +1225,44 @@ static gboolean completion_window_button_press(GtkWidget *widget,
                                restore = FALSE;
                                break;
                        }
-                   event_widget = event_widget->parent;
+                       event_widget = event_widget->parent;
                }
        }
 
        if (restore) {
-               prefix = get_complete_address(0);
+               /* 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), prefix, cursor_pos);
+               replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos);
        }
 
-       gtk_widget_destroy(*completion_window);
-       *completion_window = 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,
-                                           GtkWidget **completion_window)
+                                           CompletionWindow *compWin )
 {
        GdkEventKey tmp_event;
        GtkWidget *entry;
-       gchar *prefix;
+       gchar *searchTerm;
        gint cursor_pos;
        GtkWidget *clist;
+       GtkWidget *parent;
 
-       g_return_val_if_fail(completion_window != NULL, FALSE);
-       g_return_val_if_fail(*completion_window != NULL, FALSE);
+       g_return_val_if_fail(compWin != NULL, FALSE);
 
-       entry = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(*completion_window),
-                                              WINDOW_DATA_COMPL_ENTRY));
-       clist = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(*completion_window),
-                                              WINDOW_DATA_COMPL_CLIST));
+       entry = compWin->entry;
+       clist = compWin->clist;
        g_return_val_if_fail(entry != NULL, FALSE);
 
        /* allow keyboard navigation in the alternatives clist */
@@ -927,6 +1275,7 @@ static gboolean completion_window_key_press(GtkWidget *widget,
                return FALSE;
        }               
 
+#if 0  
        /* also make tab / shift tab go to next previous completion entry. we're
         * changing the key value */
        if (event->keyval == GDK_Tab || event->keyval == GDK_ISO_Left_Tab) {
@@ -939,12 +1288,51 @@ static gboolean completion_window_key_press(GtkWidget *widget,
                        event->keyval == GDK_Down ? TRUE : FALSE);
                return FALSE;
        }
+#endif
+
+       /* make tab move to next field */
+       if( event->keyval == GDK_Tab ) {
+               /* Reference to parent */
+               parent = GTK_WIDGET(entry)->parent;
+
+               /* Discard the window */
+               clear_completion_cache();
+               addrcompl_destroy_window( _compWindow_ );
+
+               /* Move focus to next widget */
+               if( parent ) {
+                       gtk_container_focus( GTK_CONTAINER(parent), GTK_DIR_TAB_FORWARD );
+               }
+               return FALSE;
+       }
+
+       /* make backtab move to previous field */
+       if( event->keyval == GDK_ISO_Left_Tab ) {
+               /* Reference to parent */
+               parent = GTK_WIDGET(entry)->parent;
+
+               /* Discard the window */
+               clear_completion_cache();
+               addrcompl_destroy_window( _compWindow_ );
+
+               /* Move focus to previous widget */
+               if( parent ) {
+                       gtk_container_focus( GTK_CONTAINER(parent), GTK_DIR_TAB_BACKWARD );
+               }
+               return FALSE;
+       }
 
        /* look for presses that accept the selection */
        if (event->keyval == GDK_Return || event->keyval == GDK_space) {
-               completion_window_accept_selection(completion_window,
-                                                  GTK_CLIST(clist),
-                                                  GTK_ENTRY(entry));
+               /* User selected address with a key press */
+
+               /* Display selected address in entry field */           
+               completion_window_apply_selection(
+                       GTK_CLIST(clist), GTK_ENTRY(entry) );
+
+               /* Discard the window */
+               clear_completion_cache();
+               addrcompl_destroy_window( _compWindow_ );
                return FALSE;
        }
 
@@ -962,12 +1350,10 @@ static gboolean completion_window_key_press(GtkWidget *widget,
                return FALSE;
        }
 
-       /* other key, let's restore the prefix (orignal text) */
-       prefix = get_complete_address(0);
+       /* 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), prefix, cursor_pos);
-       g_free(prefix);
-       clear_completion_cache();
+       replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos);
 
        /* make sure anything we typed comes in the edit box */
        tmp_event.type       = event->type;
@@ -981,8 +1367,47 @@ static gboolean completion_window_key_press(GtkWidget *widget,
        gtk_widget_event(entry, (GdkEvent *)&tmp_event);
 
        /* and close the completion window */
-       gtk_widget_destroy(*completion_window);
-       *completion_window = NULL;
+       clear_completion_cache();
+       addrcompl_destroy_window( _compWindow_ );
 
        return TRUE;
 }
+
+/*
+ * ============================================================================
+ * Publically accessible functions.
+ * ============================================================================
+ */
+
+/**
+ * Setup completion object.
+ */
+void addrcompl_initialize( void ) {
+       /* printf( "addrcompl_initialize...\n" ); */
+       if( ! _compWindow_ ) {
+               _compWindow_ = addrcompl_create_window();
+       }
+       _queryID_ = 0;
+       _completionIdleID_ = 0;
+       /* printf( "addrcompl_initialize...done\n" ); */
+}
+
+/**
+ * Teardown completion object.
+ */
+void addrcompl_teardown( void ) {
+       /* printf( "addrcompl_teardown...\n" ); */
+       addrcompl_free_window( _compWindow_ );
+       _compWindow_ = NULL;
+       if( _displayQueue_ ) {
+               g_list_free( _displayQueue_ );
+       }
+       _displayQueue_ = NULL;
+       _completionIdleID_ = 0;
+       /* printf( "addrcompl_teardown...done\n" ); */
+}
+
+/*
+ * End of Source.
+ */
+