2014-05-03 23:27:38 +01:00
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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2014-04-05 11:45:59 +01:00
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#include <stdio.h>
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2014-06-16 06:33:14 +01:00
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#include <stdint.h>
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2014-03-29 14:20:05 +00:00
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#include <string.h>
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2015-01-07 23:38:50 +00:00
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#include "py/mpstate.h"
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2015-04-26 17:55:31 +01:00
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#include "py/repl.h"
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2014-03-29 14:20:05 +00:00
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#include "readline.h"
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2015-02-13 15:26:53 +00:00
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#ifdef MICROPY_HAL_H
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2015-02-13 15:04:53 +00:00
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#include MICROPY_HAL_H
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2015-02-13 15:26:53 +00:00
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#endif
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2014-03-29 14:20:05 +00:00
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2014-04-05 11:45:59 +01:00
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#if 0 // print debugging info
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#define DEBUG_PRINT (1)
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#define DEBUG_printf printf
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#else // don't print debugging info
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#define DEBUG_printf(...) (void)0
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#endif
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2015-01-07 23:38:50 +00:00
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#define READLINE_HIST_SIZE (MP_ARRAY_SIZE(MP_STATE_PORT(readline_hist)))
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2014-03-29 14:20:05 +00:00
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2014-04-05 11:45:59 +01:00
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enum { ESEQ_NONE, ESEQ_ESC, ESEQ_ESC_BRACKET, ESEQ_ESC_BRACKET_DIGIT, ESEQ_ESC_O };
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2014-04-05 00:44:33 +01:00
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2014-08-04 11:09:51 +01:00
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void readline_init0(void) {
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2015-01-07 23:38:50 +00:00
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memset(MP_STATE_PORT(readline_hist), 0, READLINE_HIST_SIZE * sizeof(const char*));
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2014-03-29 14:20:05 +00:00
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}
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2014-05-10 17:48:46 +01:00
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STATIC char *str_dup_maybe(const char *str) {
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2014-03-29 14:20:05 +00:00
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uint32_t len = strlen(str);
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2014-05-10 17:48:46 +01:00
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char *s2 = m_new_maybe(char, len + 1);
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if (s2 == NULL) {
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return NULL;
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}
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memcpy(s2, str, len + 1);
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2014-03-29 14:20:05 +00:00
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return s2;
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}
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2015-05-28 12:35:38 +01:00
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// By default assume terminal which implements VT100 commands...
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#ifndef MICROPY_HAL_HAS_VT100
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#define MICROPY_HAL_HAS_VT100 (1)
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#endif
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// ...and provide the implementation using them
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#if MICROPY_HAL_HAS_VT100
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STATIC void mp_hal_move_cursor_back(uint pos) {
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2015-01-25 18:26:07 +00:00
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if (pos <= 4) {
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// fast path for most common case of 1 step back
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2015-02-13 15:04:53 +00:00
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mp_hal_stdout_tx_strn("\b\b\b\b", pos);
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2015-01-25 18:26:07 +00:00
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} else {
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char vt100_command[6];
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// snprintf needs space for the terminating null character
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int n = snprintf(&vt100_command[0], sizeof(vt100_command), "\x1b[%u", pos);
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if (n > 0) {
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vt100_command[n] = 'D'; // replace null char
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2015-02-13 15:04:53 +00:00
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mp_hal_stdout_tx_strn(vt100_command, n + 1);
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2015-01-25 18:26:07 +00:00
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}
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}
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}
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2015-05-28 12:35:38 +01:00
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STATIC void mp_hal_erase_line_from_cursor(void) {
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2015-02-13 15:04:53 +00:00
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mp_hal_stdout_tx_strn("\x1b[K", 3);
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2015-01-25 18:26:07 +00:00
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}
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2015-05-28 12:35:38 +01:00
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#endif
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2015-01-25 18:26:07 +00:00
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2015-01-12 02:36:57 +00:00
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typedef struct _readline_t {
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vstr_t *line;
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2015-05-17 00:05:31 +01:00
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size_t orig_line_len;
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2015-01-12 02:36:57 +00:00
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int escape_seq;
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int hist_cur;
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2015-05-17 00:05:31 +01:00
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size_t cursor_pos;
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2015-01-12 02:36:57 +00:00
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char escape_seq_buf[1];
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2015-04-26 17:52:01 +01:00
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const char *prompt;
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2015-01-12 02:36:57 +00:00
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} readline_t;
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2015-01-25 18:26:07 +00:00
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STATIC readline_t rl;
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2015-01-12 02:36:57 +00:00
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int readline_process_char(int c) {
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2015-05-17 00:05:31 +01:00
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size_t last_line_len = rl.line->len;
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2015-01-12 02:36:57 +00:00
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int redraw_step_back = 0;
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bool redraw_from_cursor = false;
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int redraw_step_forward = 0;
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if (rl.escape_seq == ESEQ_NONE) {
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2015-10-09 22:41:10 +01:00
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if (CHAR_CTRL_A <= c && c <= CHAR_CTRL_E && vstr_len(rl.line) == rl.orig_line_len) {
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2015-01-12 02:36:57 +00:00
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// control character with empty line
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return c;
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} else if (c == CHAR_CTRL_A) {
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// CTRL-A with non-empty line is go-to-start-of-line
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goto home_key;
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2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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} else if (c == CHAR_CTRL_B) {
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// CTRL-B with non-empty line is go-back-one-char
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goto left_arrow_key;
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#endif
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2015-01-12 02:36:57 +00:00
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} else if (c == CHAR_CTRL_C) {
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// CTRL-C with non-empty line is cancel
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return c;
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2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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} else if (c == CHAR_CTRL_D) {
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// CTRL-D with non-empty line is delete-at-cursor
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goto delete_key;
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#endif
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2015-01-12 02:36:57 +00:00
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} else if (c == CHAR_CTRL_E) {
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// CTRL-E is go-to-end-of-line
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goto end_key;
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2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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} else if (c == CHAR_CTRL_F) {
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// CTRL-F with non-empty line is go-forward-one-char
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goto right_arrow_key;
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} else if (c == CHAR_CTRL_K) {
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// CTRL-K is kill from cursor to end-of-line, inclusive
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vstr_cut_tail_bytes(rl.line, last_line_len - rl.cursor_pos);
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// set redraw parameters
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redraw_from_cursor = true;
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} else if (c == CHAR_CTRL_N) {
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// CTRL-N is go to next line in history
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goto down_arrow_key;
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} else if (c == CHAR_CTRL_P) {
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// CTRL-P is go to previous line in history
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goto up_arrow_key;
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} else if (c == CHAR_CTRL_U) {
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// CTRL-U is kill from beginning-of-line up to cursor
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vstr_cut_out_bytes(rl.line, rl.orig_line_len, rl.cursor_pos - rl.orig_line_len);
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// set redraw parameters
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redraw_step_back = rl.cursor_pos - rl.orig_line_len;
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redraw_from_cursor = true;
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#endif
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2015-01-12 02:36:57 +00:00
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} else if (c == '\r') {
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// newline
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2015-02-13 15:04:53 +00:00
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mp_hal_stdout_tx_str("\r\n");
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2015-05-17 00:05:31 +01:00
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readline_push_history(vstr_null_terminated_str(rl.line) + rl.orig_line_len);
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2015-01-12 02:36:57 +00:00
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return 0;
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} else if (c == 27) {
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// escape sequence
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rl.escape_seq = ESEQ_ESC;
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} else if (c == 8 || c == 127) {
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// backspace/delete
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if (rl.cursor_pos > rl.orig_line_len) {
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2015-08-20 10:34:16 +01:00
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// work out how many chars to backspace
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#if MICROPY_REPL_AUTO_INDENT
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int nspace = 0;
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for (size_t i = rl.orig_line_len; i < rl.cursor_pos; i++) {
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if (rl.line->buf[i] != ' ') {
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nspace = 0;
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break;
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}
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nspace += 1;
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}
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if (nspace < 4) {
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nspace = 1;
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} else {
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nspace = 4;
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}
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#else
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int nspace = 1;
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#endif
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// do the backspace
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vstr_cut_out_bytes(rl.line, rl.cursor_pos - nspace, nspace);
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2014-03-29 14:20:05 +00:00
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// set redraw parameters
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2015-08-20 10:34:16 +01:00
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redraw_step_back = nspace;
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2014-03-29 14:20:05 +00:00
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redraw_from_cursor = true;
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}
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2015-04-26 17:55:31 +01:00
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#if MICROPY_HELPER_REPL
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} else if (c == 9) {
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// tab magic
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const char *compl_str;
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mp_uint_t compl_len = mp_repl_autocomplete(rl.line->buf + rl.orig_line_len, rl.cursor_pos - rl.orig_line_len, &mp_plat_print, &compl_str);
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if (compl_len == 0) {
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// no match
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} else if (compl_len == (mp_uint_t)(-1)) {
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// many matches
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mp_hal_stdout_tx_str(rl.prompt);
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mp_hal_stdout_tx_strn(rl.line->buf + rl.orig_line_len, rl.cursor_pos - rl.orig_line_len);
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redraw_from_cursor = true;
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} else {
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// one match
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2015-05-17 00:05:31 +01:00
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for (mp_uint_t i = 0; i < compl_len; ++i) {
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2015-04-26 17:55:31 +01:00
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vstr_ins_byte(rl.line, rl.cursor_pos + i, *compl_str++);
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}
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// set redraw parameters
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redraw_from_cursor = true;
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redraw_step_forward = compl_len;
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}
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#endif
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2015-01-12 02:36:57 +00:00
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} else if (32 <= c && c <= 126) {
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// printable character
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vstr_ins_char(rl.line, rl.cursor_pos, c);
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// set redraw parameters
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redraw_from_cursor = true;
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redraw_step_forward = 1;
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}
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} else if (rl.escape_seq == ESEQ_ESC) {
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switch (c) {
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case '[':
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rl.escape_seq = ESEQ_ESC_BRACKET;
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break;
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case 'O':
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rl.escape_seq = ESEQ_ESC_O;
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break;
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default:
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DEBUG_printf("(ESC %d)", c);
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rl.escape_seq = ESEQ_NONE;
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}
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} else if (rl.escape_seq == ESEQ_ESC_BRACKET) {
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if ('0' <= c && c <= '9') {
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rl.escape_seq = ESEQ_ESC_BRACKET_DIGIT;
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rl.escape_seq_buf[0] = c;
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} else {
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rl.escape_seq = ESEQ_NONE;
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if (c == 'A') {
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2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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up_arrow_key:
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#endif
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2015-01-12 02:36:57 +00:00
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// up arrow
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2015-05-17 00:05:31 +01:00
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if (rl.hist_cur + 1 < (int)READLINE_HIST_SIZE && MP_STATE_PORT(readline_hist)[rl.hist_cur + 1] != NULL) {
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2015-01-12 02:36:57 +00:00
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// increase hist num
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rl.hist_cur += 1;
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// set line to history
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rl.line->len = rl.orig_line_len;
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vstr_add_str(rl.line, MP_STATE_PORT(readline_hist)[rl.hist_cur]);
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// set redraw parameters
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redraw_step_back = rl.cursor_pos - rl.orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = rl.line->len - rl.orig_line_len;
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}
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} else if (c == 'B') {
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2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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down_arrow_key:
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#endif
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2015-01-12 02:36:57 +00:00
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// down arrow
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if (rl.hist_cur >= 0) {
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// decrease hist num
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rl.hist_cur -= 1;
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// set line to history
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vstr_cut_tail_bytes(rl.line, rl.line->len - rl.orig_line_len);
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if (rl.hist_cur >= 0) {
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vstr_add_str(rl.line, MP_STATE_PORT(readline_hist)[rl.hist_cur]);
|
2014-03-29 14:20:05 +00:00
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}
|
2015-01-12 02:36:57 +00:00
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// set redraw parameters
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redraw_step_back = rl.cursor_pos - rl.orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = rl.line->len - rl.orig_line_len;
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}
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} else if (c == 'C') {
|
2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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right_arrow_key:
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#endif
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2015-01-12 02:36:57 +00:00
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// right arrow
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if (rl.cursor_pos < rl.line->len) {
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redraw_step_forward = 1;
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}
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} else if (c == 'D') {
|
2015-07-10 00:32:36 +01:00
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#if MICROPY_REPL_EMACS_KEYS
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left_arrow_key:
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#endif
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2015-01-12 02:36:57 +00:00
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// left arrow
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if (rl.cursor_pos > rl.orig_line_len) {
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redraw_step_back = 1;
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2014-03-29 14:20:05 +00:00
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}
|
2015-01-12 02:36:57 +00:00
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} else if (c == 'H') {
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// home
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goto home_key;
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} else if (c == 'F') {
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// end
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goto end_key;
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} else {
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|
DEBUG_printf("(ESC [ %d)", c);
|
2014-04-03 23:30:24 +01:00
|
|
|
}
|
2015-01-12 02:36:57 +00:00
|
|
|
}
|
|
|
|
} else if (rl.escape_seq == ESEQ_ESC_BRACKET_DIGIT) {
|
|
|
|
if (c == '~') {
|
|
|
|
if (rl.escape_seq_buf[0] == '1' || rl.escape_seq_buf[0] == '7') {
|
2014-04-05 00:44:33 +01:00
|
|
|
home_key:
|
2015-01-12 02:36:57 +00:00
|
|
|
redraw_step_back = rl.cursor_pos - rl.orig_line_len;
|
|
|
|
} else if (rl.escape_seq_buf[0] == '4' || rl.escape_seq_buf[0] == '8') {
|
2014-04-05 00:44:33 +01:00
|
|
|
end_key:
|
2015-01-12 02:36:57 +00:00
|
|
|
redraw_step_forward = rl.line->len - rl.cursor_pos;
|
2015-05-28 12:41:36 +01:00
|
|
|
} else if (rl.escape_seq_buf[0] == '3') {
|
|
|
|
// delete
|
2015-07-10 00:32:36 +01:00
|
|
|
#if MICROPY_REPL_EMACS_KEYS
|
|
|
|
delete_key:
|
|
|
|
#endif
|
|
|
|
if (rl.cursor_pos < rl.line->len) {
|
2015-05-28 12:41:36 +01:00
|
|
|
vstr_cut_out_bytes(rl.line, rl.cursor_pos, 1);
|
|
|
|
redraw_from_cursor = true;
|
|
|
|
}
|
2014-04-05 11:45:59 +01:00
|
|
|
} else {
|
2015-01-12 02:36:57 +00:00
|
|
|
DEBUG_printf("(ESC [ %c %d)", rl.escape_seq_buf[0], c);
|
2014-04-05 00:44:33 +01:00
|
|
|
}
|
2014-03-29 14:20:05 +00:00
|
|
|
} else {
|
2015-01-12 02:36:57 +00:00
|
|
|
DEBUG_printf("(ESC [ %c %d)", rl.escape_seq_buf[0], c);
|
2014-03-29 14:20:05 +00:00
|
|
|
}
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.escape_seq = ESEQ_NONE;
|
|
|
|
} else if (rl.escape_seq == ESEQ_ESC_O) {
|
|
|
|
switch (c) {
|
|
|
|
case 'H':
|
|
|
|
goto home_key;
|
|
|
|
case 'F':
|
|
|
|
goto end_key;
|
|
|
|
default:
|
|
|
|
DEBUG_printf("(ESC O %d)", c);
|
|
|
|
rl.escape_seq = ESEQ_NONE;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
rl.escape_seq = ESEQ_NONE;
|
|
|
|
}
|
2014-03-29 14:20:05 +00:00
|
|
|
|
2015-01-12 02:36:57 +00:00
|
|
|
// redraw command prompt, efficiently
|
|
|
|
if (redraw_step_back > 0) {
|
2015-05-28 12:35:38 +01:00
|
|
|
mp_hal_move_cursor_back(redraw_step_back);
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.cursor_pos -= redraw_step_back;
|
|
|
|
}
|
|
|
|
if (redraw_from_cursor) {
|
|
|
|
if (rl.line->len < last_line_len) {
|
|
|
|
// erase old chars
|
2015-01-25 18:26:07 +00:00
|
|
|
// (number of chars to erase: last_line_len - rl.cursor_pos)
|
2015-05-28 12:35:38 +01:00
|
|
|
mp_hal_erase_line_from_cursor();
|
2015-01-12 02:36:57 +00:00
|
|
|
}
|
|
|
|
// draw new chars
|
2015-02-13 15:04:53 +00:00
|
|
|
mp_hal_stdout_tx_strn(rl.line->buf + rl.cursor_pos, rl.line->len - rl.cursor_pos);
|
2015-01-12 02:36:57 +00:00
|
|
|
// move cursor forward if needed (already moved forward by length of line, so move it back)
|
2015-05-28 12:35:38 +01:00
|
|
|
mp_hal_move_cursor_back(rl.line->len - (rl.cursor_pos + redraw_step_forward));
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.cursor_pos += redraw_step_forward;
|
|
|
|
} else if (redraw_step_forward > 0) {
|
|
|
|
// draw over old chars to move cursor forwards
|
2015-02-13 15:04:53 +00:00
|
|
|
mp_hal_stdout_tx_strn(rl.line->buf + rl.cursor_pos, redraw_step_forward);
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.cursor_pos += redraw_step_forward;
|
|
|
|
}
|
|
|
|
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2015-08-20 10:34:16 +01:00
|
|
|
#if MICROPY_REPL_AUTO_INDENT
|
|
|
|
STATIC void readline_auto_indent(void) {
|
|
|
|
vstr_t *line = rl.line;
|
|
|
|
if (line->len > 1 && line->buf[line->len - 1] == '\n') {
|
|
|
|
int i;
|
|
|
|
for (i = line->len - 1; i > 0; i--) {
|
|
|
|
if (line->buf[i - 1] == '\n') {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
size_t j;
|
|
|
|
for (j = i; j < line->len; j++) {
|
|
|
|
if (line->buf[j] != ' ') {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// i=start of line; j=first non-space
|
|
|
|
int n = (j - i) / 4;
|
|
|
|
if (line->buf[line->len - 2] == ':') {
|
|
|
|
n += 1;
|
|
|
|
}
|
|
|
|
while (n-- > 0) {
|
|
|
|
vstr_add_strn(line, " ", 4);
|
|
|
|
mp_hal_stdout_tx_strn(" ", 4);
|
|
|
|
rl.cursor_pos += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2015-04-26 17:52:01 +01:00
|
|
|
void readline_note_newline(const char *prompt) {
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.orig_line_len = rl.line->len;
|
|
|
|
rl.cursor_pos = rl.orig_line_len;
|
2015-04-26 17:52:01 +01:00
|
|
|
rl.prompt = prompt;
|
|
|
|
mp_hal_stdout_tx_str(prompt);
|
2015-08-20 10:34:16 +01:00
|
|
|
#if MICROPY_REPL_AUTO_INDENT
|
|
|
|
readline_auto_indent();
|
|
|
|
#endif
|
2015-01-12 02:36:57 +00:00
|
|
|
}
|
|
|
|
|
2015-04-26 17:52:01 +01:00
|
|
|
void readline_init(vstr_t *line, const char *prompt) {
|
2015-01-12 02:36:57 +00:00
|
|
|
rl.line = line;
|
|
|
|
rl.orig_line_len = line->len;
|
|
|
|
rl.escape_seq = ESEQ_NONE;
|
|
|
|
rl.escape_seq_buf[0] = 0;
|
|
|
|
rl.hist_cur = -1;
|
|
|
|
rl.cursor_pos = rl.orig_line_len;
|
2015-04-26 17:52:01 +01:00
|
|
|
rl.prompt = prompt;
|
|
|
|
mp_hal_stdout_tx_str(prompt);
|
2015-08-20 10:34:16 +01:00
|
|
|
#if MICROPY_REPL_AUTO_INDENT
|
|
|
|
readline_auto_indent();
|
|
|
|
#endif
|
2015-01-12 02:36:57 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int readline(vstr_t *line, const char *prompt) {
|
2015-04-26 17:52:01 +01:00
|
|
|
readline_init(line, prompt);
|
2015-01-12 02:36:57 +00:00
|
|
|
for (;;) {
|
2015-02-13 15:04:53 +00:00
|
|
|
int c = mp_hal_stdin_rx_chr();
|
2015-01-12 02:36:57 +00:00
|
|
|
int r = readline_process_char(c);
|
|
|
|
if (r >= 0) {
|
|
|
|
return r;
|
2014-03-29 14:20:05 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2015-05-17 00:05:31 +01:00
|
|
|
|
|
|
|
void readline_push_history(const char *line) {
|
|
|
|
if (line[0] != '\0'
|
|
|
|
&& (MP_STATE_PORT(readline_hist)[0] == NULL
|
|
|
|
|| strcmp(MP_STATE_PORT(readline_hist)[0], line) != 0)) {
|
|
|
|
// a line which is not empty and different from the last one
|
|
|
|
// so update the history
|
|
|
|
char *most_recent_hist = str_dup_maybe(line);
|
|
|
|
if (most_recent_hist != NULL) {
|
|
|
|
for (int i = READLINE_HIST_SIZE - 1; i > 0; i--) {
|
|
|
|
MP_STATE_PORT(readline_hist)[i] = MP_STATE_PORT(readline_hist)[i - 1];
|
|
|
|
}
|
|
|
|
MP_STATE_PORT(readline_hist)[0] = most_recent_hist;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|