Refactoring.

src/sdtui.c

@@ -74,42 +74,12 @@ struct curses_event
 	MEVENT  mouse;
 };
 
-// --- SIGWINCH ----------------------------------------------------------------
-
-static int g_winch_pipe[2];            /**< SIGWINCH signalling pipe. */
-static void (*g_old_winch_handler) (int);
-
-static void
-winch_handler (int signum)
-{
-	/* Call the ncurses handler. */
-	if (g_old_winch_handler)
-		g_old_winch_handler (signum);
-
-	/* And wake up the poll() call. */
-	write (g_winch_pipe[1], "x", 1);
-}
-
-static void
-install_winch_handler (void)
-{
-	struct sigaction act, oldact;
-
-	act.sa_handler = winch_handler;
-	act.sa_flags = SA_RESTART;
-	sigemptyset (&act.sa_mask);
-	sigaction (SIGWINCH, &act, &oldact);
-
-	/* Save the ncurses handler. */
-	if (oldact.sa_handler != SIG_DFL
-	 && oldact.sa_handler != SIG_IGN)
-		g_old_winch_handler = oldact.sa_handler;
-}
-
 // --- Application -------------------------------------------------------------
 
 /** Data relating to one entry within the dictionary. */
 typedef struct view_entry               ViewEntry;
+/** Encloses application data. */
+typedef struct application              Application;
 
 struct view_entry
 {
@@ -118,18 +88,21 @@ struct view_entry
 	gsize     definitions_length;       //!< Length of the @a definitions array
 };
 
-GIConv g_utf8_to_wchar;                 //!< utf-8 -> wchar_t conversion
-GIConv g_wchar_to_utf8;                 //!< wchar_t -> utf-8 conversion
+struct application
+{
+	GIConv utf8_to_wchar;               //!< utf-8 -> wchar_t conversion
+	GIConv wchar_to_utf8;               //!< wchar_t -> utf-8 conversion
 
-StardictDict *g_dict;                   //!< The current dictionary
+	StardictDict *dict;                 //!< The current dictionary
 
-guint32 g_top_position;                 //!< Index of the topmost view entry
-guint g_top_offset;                     //!< Offset into the top entry
-guint g_selected;                       //!< Offset to the selected definition
-GPtrArray *g_entries;                   //!< ViewEntry's within the view
+	guint32 top_position;               //!< Index of the topmost dict. entry
+	guint top_offset;                   //!< Offset into the top entry
+	guint selected;                     //!< Offset to the selected definition
+	GPtrArray *entries;                 //!< ViewEntry's within the view
 
-GString *g_input;                       //!< The current search input
-guint g_input_pos;                      //!< Cursor position within input
+	GString *input;                     //!< The current search input
+	guint input_pos;                    //!< Cursor position within input
+};
 
 
 /** Decomposes a dictionary entry into the format we want. */
@@ -189,19 +162,20 @@ view_entry_free (ViewEntry *ve)
 
 /** Reload view items. */
 static void
-app_reload_view (void)
+app_reload_view (Application *self)
 {
-	if (g_entries->len != 0)
-		g_ptr_array_remove_range (g_entries, 0, g_entries->len);
+	if (self->entries->len != 0)
+		g_ptr_array_remove_range (self->entries, 0, self->entries->len);
 
-	g_selected = 0;
+	self->selected = 0;
 	gint remains = LINES - 1;
-	StardictIterator *iterator = stardict_iterator_new (g_dict, g_top_position);
+	StardictIterator *iterator =
+		stardict_iterator_new (self->dict, self->top_position);
 	while (remains > 0 && stardict_iterator_is_valid (iterator))
 	{
 		ViewEntry *entry = view_entry_new (iterator);
 		remains -= entry->definitions_length;
-		g_ptr_array_add (g_entries, entry);
+		g_ptr_array_add (self->entries, entry);
 		stardict_iterator_next (iterator);
 	}
 	g_object_unref (iterator);
@@ -209,46 +183,46 @@ app_reload_view (void)
 
 /** Initialize the application core. */
 static void
-app_init (const gchar *filename)
+app_init (Application *self, const gchar *filename)
 {
 	GError *error;
-	g_dict = stardict_dict_new (filename, &error);
-	if (!g_dict)
+	self->dict = stardict_dict_new (filename, &error);
+	if (!self->dict)
 	{
 		g_printerr ("Error loading dictionary: %s\n", error->message);
 		exit (EXIT_FAILURE);
 	}
 
-	g_top_position = 0;
-	g_top_offset = 0;
-	g_selected = 0;
-	g_entries = g_ptr_array_new_with_free_func
+	self->top_position = 0;
+	self->top_offset = 0;
+	self->selected = 0;
+	self->entries = g_ptr_array_new_with_free_func
 		((GDestroyNotify) view_entry_free);
 
-	g_input = g_string_new (NULL);
-	g_input_pos = 0;
+	self->input = g_string_new (NULL);
+	self->input_pos = 0;
 
-	g_wchar_to_utf8 = g_iconv_open ("utf-8//translit", "wchar_t");
-	g_utf8_to_wchar = g_iconv_open ("wchar_t//translit", "utf-8");
+	self->wchar_to_utf8 = g_iconv_open ("utf-8//translit", "wchar_t");
+	self->utf8_to_wchar = g_iconv_open ("wchar_t//translit", "utf-8");
 
-	app_reload_view ();
+	app_reload_view (self);
 }
 
 /** Free any resources used by the application. */
 static void
-app_destroy (void)
+app_destroy (Application *self)
 {
-	g_object_unref (g_dict);
-	g_ptr_array_free (g_entries, TRUE);
-	g_string_free (g_input, TRUE);
+	g_object_unref (self->dict);
+	g_ptr_array_free (self->entries, TRUE);
+	g_string_free (self->input, TRUE);
 
-	g_iconv_close (g_wchar_to_utf8);
-	g_iconv_close (g_utf8_to_wchar);
+	g_iconv_close (self->wchar_to_utf8);
+	g_iconv_close (self->utf8_to_wchar);
 }
 
 /** Render the top bar. */
 static void
-app_redraw_top (void)
+app_redraw_top (Application *self)
 {
 	mvwhline (stdscr, 0, 0, A_UNDERLINE, COLS);
 	attrset (A_UNDERLINE);
@@ -257,22 +231,22 @@ app_redraw_top (void)
 	int y, x;
 	getyx (stdscr, y, x);
 
-	gchar *input = g_locale_from_utf8 (g_input->str, -1, NULL, NULL, NULL);
+	gchar *input = g_locale_from_utf8 (self->input->str, -1, NULL, NULL, NULL);
 	g_return_if_fail (input != NULL);
 
 	addstr (input);
 	g_free (input);
 
-	move (y, x + g_input_pos);
+	move (y, x + self->input_pos);
 	refresh ();
 }
 
 /** Write the given utf-8 string padded with spaces, max. @a n characters. */
 static void
-add_padded_string (const gchar *str, int n)
+add_padded_string (Application *self, const gchar *str, int n)
 {
 	wchar_t *wide_str = (wchar_t *) g_convert_with_iconv
-		(str, -1, g_utf8_to_wchar, NULL, NULL, NULL);
+		(str, -1, self->utf8_to_wchar, NULL, NULL, NULL);
 	g_return_if_fail (wide_str != NULL);
 
 	ssize_t wide_len = wcslen (wide_str);
@@ -292,24 +266,24 @@ add_padded_string (const gchar *str, int n)
 
 /** Redraw the dictionary view. */
 static void
-app_redraw_view (void)
+app_redraw_view (Application *self)
 {
 	move (1, 0);
 
-	guint i, k = g_top_offset, shown = 0;
-	for (i = 0; i < g_entries->len; i++)
+	guint i, k = self->top_offset, shown = 0;
+	for (i = 0; i < self->entries->len; i++)
 	{
-		ViewEntry *ve = g_ptr_array_index (g_entries, i);
+		ViewEntry *ve = g_ptr_array_index (self->entries, i);
 		for (; k < ve->definitions_length; k++)
 		{
 			int attrs = 0;
-			if (shown == g_selected)              attrs |= A_REVERSE;
+			if (shown == self->selected)          attrs |= A_REVERSE;
 			if (k + 1 == ve->definitions_length)  attrs |= A_UNDERLINE;
 			attrset (attrs);
 
-			add_padded_string (ve->word, COLS / 2);
+			add_padded_string (self, ve->word, COLS / 2);
 			addwstr (L" ");
-			add_padded_string (ve->definitions[k], COLS - COLS / 2 - 1);
+			add_padded_string (self, ve->definitions[k], COLS - COLS / 2 - 1);
 
 			if ((gint) ++shown == LINES - 1)
 				goto done;
@@ -326,29 +300,29 @@ done:
 
 /** Just prepends a new view entry into the entries array. */
 static ViewEntry *
-prepend_entry (guint32 position)
+prepend_entry (Application *self, guint32 position)
 {
-	StardictIterator *iterator = stardict_iterator_new (g_dict, position);
+	StardictIterator *iterator = stardict_iterator_new (self->dict, position);
 	ViewEntry *ve = view_entry_new (iterator);
 	g_object_unref (iterator);
 
-	g_ptr_array_add (g_entries, NULL);
-	memmove (g_entries->pdata + 1, g_entries->pdata,
-		sizeof ve * (g_entries->len - 1));
-	return g_ptr_array_index (g_entries, 0) = ve;
+	g_ptr_array_add (self->entries, NULL);
+	memmove (self->entries->pdata + 1, self->entries->pdata,
+		sizeof ve * (self->entries->len - 1));
+	return g_ptr_array_index (self->entries, 0) = ve;
 }
 
 /** Just appends a new view entry to the entries array. */
 static ViewEntry *
-append_entry (guint32 position)
+append_entry (Application *self, guint32 position)
 {
 	ViewEntry *ve = NULL;
 	StardictIterator *iterator = stardict_iterator_new
-		(g_dict, position);
+		(self->dict, position);
 	if (stardict_iterator_is_valid (iterator))
 	{
 		ve = view_entry_new (iterator);
-		g_ptr_array_add (g_entries, ve);
+		g_ptr_array_add (self->entries, ve);
 	}
 	g_object_unref (iterator);
 	return ve;
@@ -356,12 +330,12 @@ append_entry (guint32 position)
 
 /** Counts the number of definitions available for seeing. */
 static guint
-count_view_items (void)
+count_view_items (Application *self)
 {
 	guint i, n_definitions = 0;
-	for (i = 0; i < g_entries->len; i++)
+	for (i = 0; i < self->entries->len; i++)
 	{
-		ViewEntry *entry = g_ptr_array_index (g_entries, i);
+		ViewEntry *entry = g_ptr_array_index (self->entries, i);
 		n_definitions += entry->definitions_length;
 	}
 	return n_definitions;
@@ -369,279 +343,326 @@ count_view_items (void)
 
 /** Scroll up @a n entries. */
 static gboolean
-app_scroll_up (guint n)
+app_scroll_up (Application *self, guint n)
 {
 	gboolean success = TRUE;
-	guint n_definitions = count_view_items ();
+	guint n_definitions = count_view_items (self);
 	while (n--)
 	{
-		if (g_top_offset > 0)
+		if (self->top_offset > 0)
 		{
-			g_top_offset--;
+			self->top_offset--;
 			continue;
 		}
 
 		/* We've reached the top */
-		if (g_top_position == 0)
+		if (self->top_position == 0)
 		{
 			success = FALSE;
 			break;
 		}
 
-		ViewEntry *ve = prepend_entry (--g_top_position);
-		g_top_offset = ve->definitions_length - 1;
+		ViewEntry *ve = prepend_entry (self, --self->top_position);
+		self->top_offset = ve->definitions_length - 1;
 		n_definitions += ve->definitions_length;
 
 		/* Remove the last entry if not shown */
 		ViewEntry *last_entry =
-			g_ptr_array_index (g_entries, g_entries->len - 1);
-		if ((gint) (n_definitions - g_top_offset
+			g_ptr_array_index (self->entries, self->entries->len - 1);
+		if ((gint) (n_definitions - self->top_offset
 			- last_entry->definitions_length) >= LINES - 1)
 		{
 			n_definitions -= last_entry->definitions_length;
 			g_ptr_array_remove_index_fast
-				(g_entries, g_entries->len - 1);
+				(self->entries, self->entries->len - 1);
 		}
 	}
 
-	app_redraw_view ();
+	app_redraw_view (self);
 	return success;
 }
 
 /** Scroll down @a n entries. */
 static gboolean
-app_scroll_down (guint n)
+app_scroll_down (Application *self, guint n)
 {
 	gboolean success = TRUE;
-	guint n_definitions = count_view_items ();
+	guint n_definitions = count_view_items (self);
 	while (n--)
 	{
-		if (g_entries->len == 0)
+		if (self->entries->len == 0)
 		{
 			success = FALSE;
 			break;
 		}
 
-		ViewEntry *first_entry = g_ptr_array_index (g_entries, 0);
-		if (g_top_offset < first_entry->definitions_length - 1)
-			g_top_offset++;
+		ViewEntry *first_entry = g_ptr_array_index (self->entries, 0);
+		if (self->top_offset < first_entry->definitions_length - 1)
+			self->top_offset++;
 		else
 		{
 			n_definitions -= first_entry->definitions_length;
-			g_ptr_array_remove_index (g_entries, 0);
-			g_top_position++;
-			g_top_offset = 0;
+			g_ptr_array_remove_index (self->entries, 0);
+			self->top_position++;
+			self->top_offset = 0;
 		}
 
-		if ((gint) (n_definitions - g_top_offset) < LINES - 1)
+		if ((gint) (n_definitions - self->top_offset) < LINES - 1)
 		{
-			ViewEntry *ve = append_entry (g_top_position + g_entries->len);
+			ViewEntry *ve = append_entry (self,
+				self->top_position + self->entries->len);
 			if (ve != NULL)
 				n_definitions += ve->definitions_length;
 		}
 	}
 
 	/* Fix cursor to not point below the view items */
-	if (g_selected >= n_definitions - g_top_offset)
-		g_selected  = n_definitions - g_top_offset - 1;
+	if (self->selected >= n_definitions - self->top_offset)
+		self->selected  = n_definitions - self->top_offset - 1;
 
-	app_redraw_view ();
+	app_redraw_view (self);
 	return success;
 }
 
 /** Redraw everything. */
 static void
-app_redraw (void)
+app_redraw (Application *self)
 {
-	app_redraw_view ();
-	app_redraw_top ();
+	app_redraw_view (self);
+	app_redraw_top (self);
 }
 
 /** Search for the current entry. */
 static void
-app_search_for_entry (void)
+app_search_for_entry (Application *self)
 {
 	StardictIterator *iterator = stardict_dict_search
-		(g_dict, g_input->str, NULL);
-	g_top_position = stardict_iterator_get_offset (iterator);
-	g_top_offset = 0;
+		(self->dict, self->input->str, NULL);
+	self->top_position = stardict_iterator_get_offset (iterator);
+	self->top_offset = 0;
 	g_object_unref (iterator);
 
-	app_reload_view ();
-	app_redraw_view ();
+	app_reload_view (self);
+	app_redraw_view (self);
 }
 
+/** Process input that's not a character. */
 static gboolean
-app_process_curses_event (CursesEvent *event)
+app_process_nonchar_code (Application *self, CursesEvent *event)
 {
-	/* g_utf8_offset_to_pointer() is too dumb to detect this */
-	g_assert (g_utf8_strlen (g_input->str, -1) >= g_input_pos);
-
-	if (!event->is_char)
-	{
 	switch (event->code)
 	{
 	case KEY_RESIZE:
 		// TODO adapt to the new window size, COLS, LINES
 		//      mind the position of the selection cursor
-			app_reload_view ();
-			app_redraw ();
+		app_reload_view (self);
+		app_redraw (self);
 		break;
 	case KEY_MOUSE:
 		// TODO move the input entry cursor
-			if ((event->mouse.bstate & BUTTON1_PRESSED) &&
-				event->mouse.y > 0 &&
-				event->mouse.y <= (int) (count_view_items () - g_top_offset))
+		if ((event->mouse.bstate & BUTTON1_PRESSED) && event->mouse.y > 0 &&
+			event->mouse.y <= (int)
+			(count_view_items (self) - self->top_offset))
 		{
-				g_selected = event->mouse.y - 1;
-				app_redraw_view ();
-				app_redraw_top (); // FIXME just focus
+			self->selected = event->mouse.y - 1;
+			app_redraw_view (self);
+			app_redraw_top (self); // FIXME just focus
 		}
 		break;
 
 	case KEY_UP:
-			if (g_selected > 0)
+		if (self->selected > 0)
 		{
-				g_selected--;
-				app_redraw_view ();
+			self->selected--;
+			app_redraw_view (self);
 		}
 		else
-				app_scroll_up (1);
-			app_redraw_top (); // FIXME just focus
+			app_scroll_up (self, 1);
+		app_redraw_top (self); // FIXME just focus
 		break;
 	case KEY_DOWN:
-			if ((gint) g_selected < LINES - 2 &&
-				g_selected < count_view_items () - g_top_offset - 1)
+		if ((gint) self->selected < LINES - 2 &&
+			self->selected < count_view_items (self) - self->top_offset - 1)
 		{
-				g_selected++;
-				app_redraw_view ();
+			self->selected++;
+			app_redraw_view (self);
 		}
 		else
-				app_scroll_down (1);
-			app_redraw_top (); // FIXME just focus
+			app_scroll_down (self, 1);
+		app_redraw_top (self); // FIXME just focus
 		break;
 	case KEY_PPAGE:
-			app_scroll_up (LINES - 1);
-			app_redraw_top (); // FIXME just focus, selection
+		app_scroll_up (self, LINES - 1);
+		app_redraw_top (self); // FIXME just focus, selection
 		break;
 	case KEY_NPAGE:
-			app_scroll_down (LINES - 1);
-			app_redraw_top (); // FIXME just focus, selection
+		app_scroll_down (self, LINES - 1);
+		app_redraw_top (self); // FIXME just focus, selection
 		break;
 
 	case KEY_HOME:
-			g_input_pos = 0;
-			app_redraw_top ();
+		self->input_pos = 0;
+		app_redraw_top (self);
 		break;
 	case KEY_END:
-			g_input_pos = g_utf8_strlen (g_input->str, -1);
-			app_redraw_top ();
+		self->input_pos = g_utf8_strlen (self->input->str, -1);
+		app_redraw_top (self);
 		break;
 	case KEY_LEFT:
-			if (g_input_pos > 0)
+		if (self->input_pos > 0)
 		{
-				g_input_pos--;
-				app_redraw_top ();
+			self->input_pos--;
+			app_redraw_top (self);
 		}
 		break;
 	case KEY_RIGHT:
-			if (g_input_pos < g_utf8_strlen (g_input->str, -1))
+		if (self->input_pos < g_utf8_strlen (self->input->str, -1))
 		{
-				g_input_pos++;
-				app_redraw_top ();
+			self->input_pos++;
+			app_redraw_top (self);
 		}
 		break;
 	case KEY_BACKSPACE:
-			if (g_input_pos > 0)
+		if (self->input_pos > 0)
 		{
 			gchar *current = g_utf8_offset_to_pointer
-					(g_input->str, g_input_pos);
+				(self->input->str, self->input_pos);
 			gchar *prev = g_utf8_prev_char (current);
-				g_string_erase (g_input, prev - g_input->str, current - prev);
-				g_input_pos--;
-				app_search_for_entry ();
-				app_redraw_top ();
+			g_string_erase (self->input,
+				prev - self->input->str, current - prev);
+			self->input_pos--;
+			app_search_for_entry (self);
+			app_redraw_top (self);
 		}
 		break;
 	case KEY_DC:
-			if (g_input_pos < g_utf8_strlen (g_input->str, -1))
+		if (self->input_pos < g_utf8_strlen (self->input->str, -1))
 		{
 			gchar *current = g_utf8_offset_to_pointer
-					(g_input->str, g_input_pos);
-				g_string_erase (g_input, current - g_input->str,
+				(self->input->str, self->input_pos);
+			g_string_erase (self->input, current - self->input->str,
 				g_utf8_next_char (current) - current);
-				app_search_for_entry ();
-				app_redraw_top ();
+			app_search_for_entry (self);
+			app_redraw_top (self);
 		}
 		break;
 	}
 	return TRUE;
-	}
+}
+
+/** Process input events from ncurses. */
+static gboolean
+app_process_curses_event (Application *self, CursesEvent *event)
+{
+	/* g_utf8_offset_to_pointer() is too dumb to detect this */
+	g_assert (g_utf8_strlen (self->input->str, -1) >= self->input_pos);
+
+	if (!event->is_char)
+		return app_process_nonchar_code (self, event);
 
 	switch (event->code)
 	{
 	case KEY_ESCAPE:
 		return FALSE;
 	case KEY_VT:  // Ctrl-K -- delete until the end of line
-		g_string_erase (g_input, utf8_offset (g_input->str, g_input_pos), -1);
+		g_string_erase (self->input,
+			utf8_offset (self->input->str, self->input_pos), -1);
 
-		app_search_for_entry ();
-		app_redraw_top ();
+		app_search_for_entry (self);
+		app_redraw_top (self);
 		return TRUE;
 	case KEY_ETB: // Ctrl-W -- delete word before cursor
 	{
-		if (!g_input_pos)
+		if (!self->input_pos)
 			return TRUE;
 
-		gchar *current = g_utf8_offset_to_pointer (g_input->str, g_input_pos);
-		gchar *space = g_utf8_strrchr (g_input->str,
-			g_utf8_prev_char (current) - g_input->str, ' ');
+		gchar *current = g_utf8_offset_to_pointer
+			(self->input->str, self->input_pos);
+		gchar *space = g_utf8_strrchr (self->input->str,
+			g_utf8_prev_char (current) - self->input->str, ' ');
 
 		if (space)
 		{
 			space = g_utf8_next_char (space);
-			g_string_erase (g_input, space - g_input->str, current - space);
-			g_input_pos = g_utf8_pointer_to_offset (g_input->str, space);
+			g_string_erase (self->input,
+				space - self->input->str, current - space);
+			self->input_pos = g_utf8_pointer_to_offset
+				(self->input->str, space);
 		}
 		else
 		{
-			g_string_erase (g_input, 0, current - g_input->str);
-			g_input_pos = 0;
+			g_string_erase (self->input, 0, current - self->input->str);
+			self->input_pos = 0;
 		}
 
-		app_search_for_entry ();
-		app_redraw_top ();
+		app_search_for_entry (self);
+		app_redraw_top (self);
 		return TRUE;
 	}
 	case KEY_NAK: // Ctrl-U -- delete everything before the cursor
-		g_string_erase (g_input, 0, utf8_offset (g_input->str, g_input_pos));
-		g_input_pos = 0;
+		g_string_erase (self->input, 0,
+			utf8_offset (self->input->str, self->input_pos));
+		self->input_pos = 0;
 
-		app_search_for_entry ();
-		app_redraw_top ();
+		app_search_for_entry (self);
+		app_redraw_top (self);
 		return TRUE;
 	}
 
 	wchar_t code = event->code;
 	gchar *letter = g_convert_with_iconv ((gchar *) &code, sizeof code,
-		g_wchar_to_utf8, NULL, NULL, NULL);
+		self->wchar_to_utf8, NULL, NULL, NULL);
 	g_return_val_if_fail (letter != NULL, FALSE);
 
 	if (g_unichar_isprint (g_utf8_get_char (letter)))
 	{
-		g_string_insert (g_input,
-			utf8_offset (g_input->str, g_input_pos), letter);
-		g_input_pos += g_utf8_strlen (letter, -1);
+		g_string_insert (self->input,
+			utf8_offset (self->input->str, self->input_pos), letter);
+		self->input_pos += g_utf8_strlen (letter, -1);
 
-		app_search_for_entry ();
-		app_redraw_top ();
+		app_search_for_entry (self);
+		app_redraw_top (self);
 	}
 	g_free (letter);
 
 	return TRUE;
 }
 
-// --- Event handlers ----------------------------------------------------------
+// --- SIGWINCH ----------------------------------------------------------------
+
+static int g_winch_pipe[2];            /**< SIGWINCH signalling pipe. */
+static void (*g_old_winch_handler) (int);
+
+static void
+winch_handler (int signum)
+{
+	/* Call the ncurses handler. */
+	if (g_old_winch_handler)
+		g_old_winch_handler (signum);
+
+	/* And wake up the poll() call. */
+	write (g_winch_pipe[1], "x", 1);
+}
+
+static void
+install_winch_handler (void)
+{
+	struct sigaction act, oldact;
+
+	act.sa_handler = winch_handler;
+	act.sa_flags = SA_RESTART;
+	sigemptyset (&act.sa_mask);
+	sigaction (SIGWINCH, &act, &oldact);
+
+	/* Save the ncurses handler. */
+	if (oldact.sa_handler != SIG_DFL
+	 && oldact.sa_handler != SIG_IGN)
+		g_old_winch_handler = oldact.sa_handler;
+}
+
+// --- Initialisation, event handling ------------------------------------------
+
+Application g_application;
 
 static gboolean
 process_stdin_input (void)
@@ -655,7 +676,7 @@ process_stdin_input (void)
 		if (sta == KEY_CODE_YES && event.code == KEY_MOUSE
 			&& getmouse (&event.mouse) == ERR)
 			abort ();
-		if (!app_process_curses_event (&event))
+		if (!app_process_curses_event (&g_application, &event))
 			return FALSE;
 	}
 
@@ -671,8 +692,6 @@ process_winch_input (int fd)
 	return process_stdin_input ();
 }
 
-// --- Main --------------------------------------------------------------------
-
 int
 main (int argc, char *argv[])
 {
@@ -710,7 +729,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
 
 	g_option_context_free (ctx);
 
-	app_init (argv[1]);
+	app_init (&g_application, argv[1]);
 
 	if (!initscr ()
 	 || cbreak () == ERR
@@ -728,7 +747,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
 		abort ();
 	install_winch_handler ();
 
-	app_redraw ();
+	app_redraw (&g_application);
 
 	/* Message loop. */
 	struct pollfd pollfd[2];
@@ -752,7 +771,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
 	}
 
 	endwin ();
-	app_destroy ();
+	app_destroy (&g_application);
 
 	if (close (g_winch_pipe[0]) == -1
 	 || close (g_winch_pipe[1]) == -1)