diff options
Diffstat (limited to 'readline.c')
| -rw-r--r-- | readline.c | 354 |
1 files changed, 275 insertions, 79 deletions
@@ -1,7 +1,7 @@ /* readline.c -- a general facility for reading lines of input with emacs style editing and completion. */ -/* Copyright (C) 1987-2002 Free Software Foundation, Inc. +/* Copyright (C) 1987-2005 Free Software Foundation, Inc. This file is part of the GNU Readline Library, a library for reading lines of text with interactive input and history editing. @@ -68,11 +68,11 @@ #include "xmalloc.h" #ifndef RL_LIBRARY_VERSION -# define RL_LIBRARY_VERSION "5.0" +# define RL_LIBRARY_VERSION "5.1" #endif #ifndef RL_READLINE_VERSION -# define RL_READLINE_VERSION 0x0500 +# define RL_READLINE_VERSION 0x0501 #endif extern void _rl_free_history_entry PARAMS((HIST_ENTRY *)); @@ -87,6 +87,9 @@ static void bind_arrow_keys PARAMS((void)); static void readline_default_bindings PARAMS((void)); static void reset_default_bindings PARAMS((void)); +static int _rl_subseq_result PARAMS((int, Keymap, int, int)); +static int _rl_subseq_getchar PARAMS((int)); + /* **************************************************************** */ /* */ /* Line editing input utility */ @@ -104,6 +107,7 @@ int rl_gnu_readline_p = 1; By default, it is the standard emacs keymap. */ Keymap _rl_keymap = emacs_standard_keymap; + /* The current style of editing. */ int rl_editing_mode = emacs_mode; @@ -219,6 +223,9 @@ char *_rl_comment_begin; /* Keymap holding the function currently being executed. */ Keymap rl_executing_keymap; +/* Keymap we're currently using to dispatch. */ +Keymap _rl_dispatching_keymap; + /* Non-zero means to erase entire line, including prompt, on empty input lines. */ int rl_erase_empty_line = 0; @@ -230,6 +237,9 @@ int rl_num_chars_to_read; char *rl_line_buffer = (char *)NULL; int rl_line_buffer_len = 0; +/* Key sequence `contexts' */ +_rl_keyseq_cxt *_rl_kscxt = 0; + /* Forward declarations used by the display, termcap, and history code. */ /* **************************************************************** */ @@ -251,6 +261,10 @@ int _rl_convert_meta_chars_to_ascii = 1; rather than as a meta-prefixed escape sequence. */ int _rl_output_meta_chars = 0; +/* Non-zero means to look at the termios special characters and bind + them to equivalent readline functions at startup. */ +int _rl_bind_stty_chars = 1; + /* **************************************************************** */ /* */ /* Top Level Functions */ @@ -291,14 +305,16 @@ readline (prompt) rl_set_prompt (prompt); rl_initialize (); - (*rl_prep_term_function) (_rl_meta_flag); + if (rl_prep_term_function) + (*rl_prep_term_function) (_rl_meta_flag); #if defined (HANDLE_SIGNALS) rl_set_signals (); #endif value = readline_internal (); - (*rl_deprep_term_function) (); + if (rl_deprep_term_function) + (*rl_deprep_term_function) (); #if defined (HANDLE_SIGNALS) rl_clear_signals (); @@ -388,6 +404,36 @@ readline_internal_teardown (eof) return (eof ? (char *)NULL : savestring (the_line)); } +void +_rl_internal_char_cleanup () +{ +#if defined (VI_MODE) + /* In vi mode, when you exit insert mode, the cursor moves back + over the previous character. We explicitly check for that here. */ + if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) + rl_vi_check (); +#endif /* VI_MODE */ + + if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read) + { + (*rl_redisplay_function) (); + _rl_want_redisplay = 0; + rl_newline (1, '\n'); + } + + if (rl_done == 0) + { + (*rl_redisplay_function) (); + _rl_want_redisplay = 0; + } + + /* If the application writer has told us to erase the entire line if + the only character typed was something bound to rl_newline, do so. */ + if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline && + rl_point == 0 && rl_end == 0) + _rl_erase_entire_line (); +} + STATIC_CALLBACK int #if defined (READLINE_CALLBACKS) readline_internal_char () @@ -410,12 +456,21 @@ readline_internal_charloop () code = setjmp (readline_top_level); if (code) - (*rl_redisplay_function) (); + { + (*rl_redisplay_function) (); + _rl_want_redisplay = 0; + /* If we get here, we're not being called from something dispatched + from _rl_callback_read_char(), which sets up its own value of + readline_top_level (saving and restoring the old, of course), so + we can just return here. */ + if (RL_ISSTATE (RL_STATE_CALLBACK)) + return (0); + } if (rl_pending_input == 0) { /* Then initialize the argument and number of keys read. */ - _rl_init_argument (); + _rl_reset_argument (); rl_key_sequence_length = 0; } @@ -449,27 +504,7 @@ readline_internal_charloop () if (rl_pending_input == 0 && lk == _rl_last_command_was_kill) _rl_last_command_was_kill = 0; -#if defined (VI_MODE) - /* In vi mode, when you exit insert mode, the cursor moves back - over the previous character. We explicitly check for that here. */ - if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) - rl_vi_check (); -#endif /* VI_MODE */ - - if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read) - { - (*rl_redisplay_function) (); - rl_newline (1, '\n'); - } - - if (rl_done == 0) - (*rl_redisplay_function) (); - - /* If the application writer has told us to erase the entire line if - the only character typed was something bound to rl_newline, do so. */ - if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline && - rl_point == 0 && rl_end == 0) - _rl_erase_entire_line (); + _rl_internal_char_cleanup (); #if defined (READLINE_CALLBACKS) return 0; @@ -519,6 +554,107 @@ _rl_set_the_line () the_line = rl_line_buffer; } +#if defined (READLINE_CALLBACKS) +_rl_keyseq_cxt * +_rl_keyseq_cxt_alloc () +{ + _rl_keyseq_cxt *cxt; + + cxt = (_rl_keyseq_cxt *)xmalloc (sizeof (_rl_keyseq_cxt)); + + cxt->flags = cxt->subseq_arg = cxt->subseq_retval = 0; + + cxt->okey = 0; + cxt->ocxt = _rl_kscxt; + cxt->childval = 42; /* sentinel value */ + + return cxt; +} + +void +_rl_keyseq_cxt_dispose (cxt) + _rl_keyseq_cxt *cxt; +{ + free (cxt); +} + +void +_rl_keyseq_chain_dispose () +{ + _rl_keyseq_cxt *cxt; + + while (_rl_kscxt) + { + cxt = _rl_kscxt; + _rl_kscxt = _rl_kscxt->ocxt; + _rl_keyseq_cxt_dispose (cxt); + } +} +#endif + +static int +_rl_subseq_getchar (key) + int key; +{ + int k; + + if (key == ESC) + RL_SETSTATE(RL_STATE_METANEXT); + RL_SETSTATE(RL_STATE_MOREINPUT); + k = rl_read_key (); + RL_UNSETSTATE(RL_STATE_MOREINPUT); + if (key == ESC) + RL_UNSETSTATE(RL_STATE_METANEXT); + + return k; +} + +#if defined (READLINE_CALLBACKS) +int +_rl_dispatch_callback (cxt) + _rl_keyseq_cxt *cxt; +{ + int nkey, r; + + /* For now */ +#if 1 + /* The first time this context is used, we want to read input and dispatch + on it. When traversing the chain of contexts back `up', we want to use + the value from the next context down. We're simulating recursion using + a chain of contexts. */ + if ((cxt->flags & KSEQ_DISPATCHED) == 0) + { + nkey = _rl_subseq_getchar (cxt->okey); + r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg); + cxt->flags |= KSEQ_DISPATCHED; + } + else + r = cxt->childval; +#else + r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg); +#endif + + /* For now */ + r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ)); + + if (r == 0) /* success! */ + { + _rl_keyseq_chain_dispose (); + RL_UNSETSTATE (RL_STATE_MULTIKEY); + return r; + } + + if (r != -3) /* magic value that says we added to the chain */ + _rl_kscxt = cxt->ocxt; + if (_rl_kscxt) + _rl_kscxt->childval = r; + if (r != -3) + _rl_keyseq_cxt_dispose (cxt); + + return r; +} +#endif /* READLINE_CALLBACKS */ + /* Do the command associated with KEY in MAP. If the associated command is really a keymap, then read another key, and dispatch into that map. */ @@ -527,6 +663,7 @@ _rl_dispatch (key, map) register int key; Keymap map; { + _rl_dispatching_keymap = map; return _rl_dispatch_subseq (key, map, 0); } @@ -539,6 +676,9 @@ _rl_dispatch_subseq (key, map, got_subseq) int r, newkey; char *macro; rl_command_func_t *func; +#if defined (READLINE_CALLBACKS) + _rl_keyseq_cxt *cxt; +#endif if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) { @@ -572,10 +712,6 @@ _rl_dispatch_subseq (key, map, got_subseq) rl_executing_keymap = map; -#if 0 - _rl_suppress_redisplay = (map[key].function == rl_insert) && _rl_input_available (); -#endif - rl_dispatching = 1; RL_SETSTATE(RL_STATE_DISPATCHING); r = (*map[key].function)(rl_numeric_arg * rl_arg_sign, key); @@ -607,6 +743,10 @@ _rl_dispatch_subseq (key, map, got_subseq) } else { +#if defined (READLINE_CALLBACKS) + RL_UNSETSTATE (RL_STATE_MULTIKEY); + _rl_keyseq_chain_dispose (); +#endif _rl_abort_internal (); return -1; } @@ -628,58 +768,43 @@ _rl_dispatch_subseq (key, map, got_subseq) #endif rl_key_sequence_length++; + _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key); - if (key == ESC) - RL_SETSTATE(RL_STATE_METANEXT); - RL_SETSTATE(RL_STATE_MOREINPUT); - newkey = rl_read_key (); - RL_UNSETSTATE(RL_STATE_MOREINPUT); - if (key == ESC) - RL_UNSETSTATE(RL_STATE_METANEXT); + /* Allocate new context here. Use linked contexts (linked through + cxt->ocxt) to simulate recursion */ +#if defined (READLINE_CALLBACKS) + if (RL_ISSTATE (RL_STATE_CALLBACK)) + { + /* Return 0 only the first time, to indicate success to + _rl_callback_read_char. The rest of the time, we're called + from _rl_dispatch_callback, so we return 3 to indicate + special handling is necessary. */ + r = RL_ISSTATE (RL_STATE_MULTIKEY) ? -3 : 0; + cxt = _rl_keyseq_cxt_alloc (); + + if (got_subseq) + cxt->flags |= KSEQ_SUBSEQ; + cxt->okey = key; + cxt->oldmap = map; + cxt->dmap = _rl_dispatching_keymap; + cxt->subseq_arg = got_subseq || cxt->dmap[ANYOTHERKEY].function; + + RL_SETSTATE (RL_STATE_MULTIKEY); + _rl_kscxt = cxt; + + return r; /* don't indicate immediate success */ + } +#endif + newkey = _rl_subseq_getchar (key); if (newkey < 0) { _rl_abort_internal (); return -1; } - r = _rl_dispatch_subseq (newkey, FUNCTION_TO_KEYMAP (map, key), got_subseq || map[ANYOTHERKEY].function); - - if (r == -2) - /* We didn't match anything, and the keymap we're indexed into - shadowed a function previously bound to that prefix. Call - the function. The recursive call to _rl_dispatch_subseq has - already taken care of pushing any necessary input back onto - the input queue with _rl_unget_char. */ - { -#if 0 - r = _rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)); -#else - /* XXX - experimental code -- might never be executed. Save - for later. */ - Keymap m = FUNCTION_TO_KEYMAP (map, key); - int type = m[ANYOTHERKEY].type; - func = m[ANYOTHERKEY].function; - if (type == ISFUNC && func == rl_do_lowercase_version) - r = _rl_dispatch (_rl_to_lower (key), map); - else - r = _rl_dispatch (ANYOTHERKEY, m); -#endif - } - else if (r && map[ANYOTHERKEY].function) - { - /* We didn't match (r is probably -1), so return something to - tell the caller that it should try ANYOTHERKEY for an - overridden function. */ - _rl_unget_char (key); - return -2; - } - else if (r && got_subseq) - { - /* OK, back up the chain. */ - _rl_unget_char (key); - return -1; - } + r = _rl_dispatch_subseq (newkey, _rl_dispatching_keymap, got_subseq || map[ANYOTHERKEY].function); + return _rl_subseq_result (r, map, key, got_subseq); } else { @@ -703,9 +828,69 @@ _rl_dispatch_subseq (key, map, got_subseq) _rl_vi_textmod_command (key)) _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign); #endif + return (r); } +static int +_rl_subseq_result (r, map, key, got_subseq) + int r; + Keymap map; + int key, got_subseq; +{ + Keymap m; + int type, nt; + rl_command_func_t *func, *nf; + + if (r == -2) + /* We didn't match anything, and the keymap we're indexed into + shadowed a function previously bound to that prefix. Call + the function. The recursive call to _rl_dispatch_subseq has + already taken care of pushing any necessary input back onto + the input queue with _rl_unget_char. */ + { + m = _rl_dispatching_keymap; + type = m[ANYOTHERKEY].type; + func = m[ANYOTHERKEY].function; + if (type == ISFUNC && func == rl_do_lowercase_version) + r = _rl_dispatch (_rl_to_lower (key), map); + else if (type == ISFUNC && func == rl_insert) + { + /* If the function that was shadowed was self-insert, we + somehow need a keymap with map[key].func == self-insert. + Let's use this one. */ + nt = m[key].type; + nf = m[key].function; + + m[key].type = type; + m[key].function = func; + r = _rl_dispatch (key, m); + m[key].type = nt; + m[key].function = nf; + } + else + r = _rl_dispatch (ANYOTHERKEY, m); + } + else if (r && map[ANYOTHERKEY].function) + { + /* We didn't match (r is probably -1), so return something to + tell the caller that it should try ANYOTHERKEY for an + overridden function. */ + _rl_unget_char (key); + _rl_dispatching_keymap = map; + return -2; + } + else if (r && got_subseq) + { + /* OK, back up the chain. */ + _rl_unget_char (key); + _rl_dispatching_keymap = map; + return -1; + } + + return r; +} + /* **************************************************************** */ /* */ /* Initializations */ @@ -863,7 +1048,8 @@ readline_initialize_everything () static void readline_default_bindings () { - rl_tty_set_default_bindings (_rl_keymap); + if (_rl_bind_stty_chars) + rl_tty_set_default_bindings (_rl_keymap); } /* Reset the default bindings for the terminal special characters we're @@ -871,8 +1057,11 @@ readline_default_bindings () static void reset_default_bindings () { - rl_tty_unset_default_bindings (_rl_keymap); - rl_tty_set_default_bindings (_rl_keymap); + if (_rl_bind_stty_chars) + { + rl_tty_unset_default_bindings (_rl_keymap); + rl_tty_set_default_bindings (_rl_keymap); + } } /* Bind some common arrow key sequences in MAP. */ @@ -906,6 +1095,13 @@ bind_arrow_keys_internal (map) rl_bind_keyseq_if_unbound ("\033OH", rl_beg_of_line); rl_bind_keyseq_if_unbound ("\033OF", rl_end_of_line); +#if defined (__MINGW32__) + rl_bind_keyseq_if_unbound ("\340H", rl_get_previous_history); + rl_bind_keyseq_if_unbound ("\340P", rl_get_next_history); + rl_bind_keyseq_if_unbound ("\340M", rl_forward_char); + rl_bind_keyseq_if_unbound ("\340K", rl_backward_char); +#endif + _rl_keymap = xkeymap; } |