Start working on sdtui; implement line editing
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parent
8ab74e16d7
commit
6db153b1e2
266
src/sdtui.c
266
src/sdtui.c
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@ -39,20 +39,15 @@
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#define KEY_ESCAPE 27 /**< Curses doesn't define this. */
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#define KEY_VT 11 /**< Ctrl-K */
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#define KEY_NAK 21 /**< Ctrl-U */
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#define KEY_ETB 23 /**< Ctrl-W */
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#define _(x) x /**< Fake gettext, for now. */
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// --- Utilities ---------------------------------------------------------------
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static void
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display (const gchar *format, ...)
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{
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va_list ap;
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va_start (ap, format);
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vw_printw (stdscr, format, ap);
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va_end (ap);
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refresh ();
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}
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/* TODO use iconv() wchar_t -> utf-8 */
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static gchar *
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wchar_to_mb (wchar_t ch)
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{
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@ -74,18 +69,6 @@ wchar_to_mb (wchar_t ch)
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return buffer;
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}
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static const gchar *
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wchar_to_mb_escaped (wchar_t ch)
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{
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switch (ch)
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{
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case L'\r': return "\\r";
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case L'\n': return "\\n";
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case L'\t': return "\\t";
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default: return wchar_to_mb (ch);
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}
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}
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static int
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poll_restart (struct pollfd *fds, nfds_t nfds, int timeout)
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{
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@ -96,6 +79,22 @@ poll_restart (struct pollfd *fds, nfds_t nfds, int timeout)
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return ret;
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}
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static gsize
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utf8_offset (const gchar *s, gsize offset)
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{
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return g_utf8_offset_to_pointer (s, offset) - s;
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}
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/** Wrapper for curses event data. */
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typedef struct curses_event CursesEvent;
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struct curses_event
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{
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wint_t code;
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guint is_char : 1;
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MEVENT mouse;
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};
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// --- SIGWINCH ----------------------------------------------------------------
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static int g_winch_pipe[2]; /**< SIGWINCH signalling pipe. */
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@ -128,50 +127,195 @@ install_winch_handler (void)
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g_old_winch_handler = oldact.sa_handler;
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}
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// --- Event handlers ----------------------------------------------------------
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// --- Application -------------------------------------------------------------
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typedef struct
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StardictDict *g_dict; //!< The current dictionary
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guint32 g_top_position; //!< Index of the topmost entry
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guint g_selected; //!< Offset to the selected entry
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GString *g_input; //!< The current search input
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guint g_input_pos; //!< Cursor position within input
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/** Initialize the application core. */
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static void
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app_init (const gchar *filename)
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{
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wint_t code;
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guint is_char : 1;
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MEVENT mouse;
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GError *error;
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g_dict = stardict_dict_new (filename, &error);
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if (!g_dict)
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{
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g_printerr ("Error loading dictionary: %s\n", error->message);
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exit (EXIT_FAILURE);
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}
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g_top_position = 0;
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g_selected = 0;
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g_input = g_string_new (NULL);
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g_input_pos = 0;
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}
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/** Render the top bar. */
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static void
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app_redraw_top (void)
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{
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mvprintw (0, 0, "%s: ", _("Search"));
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int y, x;
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getyx (stdscr, y, x);
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gchar *input = g_locale_from_utf8 (g_input->str, -1, NULL, NULL, NULL);
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g_return_if_fail (input != NULL);
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addstr (input);
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clrtoeol ();
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g_free (input);
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move (y, x + g_input_pos);
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refresh ();
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}
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/** Redraw the dictionary view. */
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static void
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app_redraw_view (void)
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{
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// TODO
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refresh ();
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}
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/** Redraw everything. */
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static void
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app_redraw (void)
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{
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app_redraw_view ();
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app_redraw_top ();
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}
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CursesEvent;
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static gboolean
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process_curses_event (CursesEvent *event)
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app_process_curses_event (CursesEvent *event)
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{
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/* g_utf8_offset_to_pointer() is too dumb to detect this */
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g_assert (g_utf8_strlen (g_input->str, -1) >= g_input_pos);
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if (!event->is_char)
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{
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switch (event->code)
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{
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case KEY_RESIZE:
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display ("Screen has been resized to %u x %u\n",
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COLS, LINES);
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// TODO adapt to the new window size, COLS, LINES
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app_redraw ();
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break;
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case KEY_MOUSE:
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display ("Mouse event at (%d, %d), state %#lx\n",
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event->mouse.x, event->mouse.y, event->mouse.bstate);
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// TODO move the item cursor, event->mouse.{x,y,bstate}
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break;
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case KEY_LEFT:
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if (g_input_pos > 0)
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{
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g_input_pos--;
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app_redraw_top ();
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}
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break;
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case KEY_RIGHT:
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if (g_input_pos < g_utf8_strlen (g_input->str, -1))
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{
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g_input_pos++;
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app_redraw_top ();
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}
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break;
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case KEY_BACKSPACE:
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if (g_input_pos > 0)
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{
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gchar *current = g_utf8_offset_to_pointer
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(g_input->str, g_input_pos);
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gchar *prev = g_utf8_prev_char (current);
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g_string_erase (g_input, prev - g_input->str, current - prev);
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g_input_pos--;
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app_redraw_top ();
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}
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break;
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case KEY_DC:
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if (g_input_pos < g_utf8_strlen (g_input->str, -1))
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{
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gchar *current = g_utf8_offset_to_pointer
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(g_input->str, g_input_pos);
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g_string_erase (g_input, current - g_input->str,
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g_utf8_next_char (current) - current);
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app_redraw_top ();
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}
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break;
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default:
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display ("Keyboard event: non-character: %u\n",
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event->code);
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}
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return TRUE;
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}
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display ("Keyboard event: character: '%s'\n",
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wchar_to_mb_escaped (event->code));
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if (event->code == L'q' || event->code == KEY_ESCAPE)
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switch (event->code)
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{
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display ("Quitting...\n");
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case KEY_ESCAPE:
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return FALSE;
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case KEY_VT: // Ctrl-K -- delete until the end of line
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g_string_erase (g_input, utf8_offset (g_input->str, g_input_pos), -1);
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app_redraw_top ();
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return TRUE;
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case KEY_ETB: // Ctrl-W -- delete word before cursor
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{
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if (!g_input_pos)
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return TRUE;
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gchar *current = g_utf8_offset_to_pointer (g_input->str, g_input_pos);
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gchar *space = g_utf8_strrchr (g_input->str,
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g_utf8_prev_char (current) - g_input->str, ' ');
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if (space)
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{
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space = g_utf8_next_char (space);
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g_string_erase (g_input, space - g_input->str, current - space);
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g_input_pos = g_utf8_pointer_to_offset (g_input->str, space);
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}
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else
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{
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g_string_erase (g_input, 0, current - g_input->str);
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g_input_pos = 0;
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}
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app_redraw_top ();
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return TRUE;
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}
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case KEY_NAK: // Ctrl-U -- delete everything before the cursor
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g_string_erase (g_input, 0, utf8_offset (g_input->str, g_input_pos));
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g_input_pos = 0;
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app_redraw_top ();
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return TRUE;
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}
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/* What can you do... wchar_t, utf-8, locale encoding... */
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gchar *letter = g_locale_to_utf8 (wchar_to_mb (event->code),
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-1, NULL, NULL, NULL);
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g_return_val_if_fail (letter != NULL, FALSE);
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if (g_unichar_isprint (g_utf8_get_char (letter)))
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{
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g_string_insert (g_input,
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utf8_offset (g_input->str, g_input_pos), letter);
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g_input_pos += g_utf8_strlen (letter, -1);
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app_redraw_top ();
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}
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g_free (letter);
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return TRUE;
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}
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/** Free any resources used by the application. */
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static void
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app_destroy (void)
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{
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g_string_free (g_input, TRUE);
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g_object_unref (g_dict);
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}
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// --- Event handlers ----------------------------------------------------------
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static gboolean
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process_stdin_input (void)
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{
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@ -184,7 +328,7 @@ process_stdin_input (void)
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if (sta == KEY_CODE_YES && event.code == KEY_MOUSE
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&& getmouse (&event.mouse) == ERR)
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abort ();
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if (!process_curses_event (&event))
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if (!app_process_curses_event (&event))
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return FALSE;
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}
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@ -214,33 +358,48 @@ main (int argc, char *argv[])
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abort ();
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GError *error = NULL;
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GOptionContext *ctx = g_option_context_new ("- StarDict terminal UI");
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GOptionContext *ctx = g_option_context_new
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("dictionary.ifo - StarDict terminal UI");
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g_option_context_add_main_entries (ctx, entries, NULL);
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if (!g_option_context_parse (ctx, &argc, &argv, &error))
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{
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g_printerr ("Error: option parsing failed: %s\n", error->message);
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g_printerr ("%s: %s: %s\n", _("Error"), _("option parsing failed"),
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error->message);
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exit (EXIT_FAILURE);
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}
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if (argc != 2)
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{
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gchar *help = g_option_context_get_help (ctx, TRUE, FALSE);
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g_printerr ("%s", help);
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g_free (help);
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exit (EXIT_FAILURE);
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}
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g_option_context_free (ctx);
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app_init (argv[1]);
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if (!initscr ()
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|| cbreak () == ERR
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|| noecho () == ERR)
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|| noecho () == ERR
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|| nonl () == ERR)
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abort ();
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keypad (stdscr, TRUE); /* Enable character processing. */
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nodelay (stdscr, TRUE); /* Don't block on get_wch(). */
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scrollok (stdscr, TRUE); /* Also scrolling, pretty please. */
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mousemask (ALL_MOUSE_EVENTS, NULL);
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display ("Press Q, Escape or ^C to quit\n");
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setscrreg (1, LINES - 1); /* Create a scroll region. */
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mousemask (ALL_MOUSE_EVENTS, NULL); /* Register mouse events. */
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if (pipe (g_winch_pipe) == -1)
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abort ();
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install_winch_handler ();
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// --- Message loop ------------------------------------------------------------
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app_redraw ();
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/* Message loop. */
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struct pollfd pollfd[2];
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pollfd[0].fd = fileno (stdin);
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@ -257,13 +416,12 @@ main (int argc, char *argv[])
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&& !process_stdin_input ())
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break;
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if ((pollfd[1].revents & POLLIN)
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&& !process_winch_input (pollfd[2].fd))
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&& !process_winch_input (pollfd[1].fd))
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break;
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}
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// --- Cleanup -----------------------------------------------------------------
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endwin ();
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app_destroy ();
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if (close (g_winch_pipe[0]) == -1
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|| close (g_winch_pipe[1]) == -1)
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