mirror of
https://github.com/licsber/micropython.git
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04b9147e15
Blanket wide to all .c and .h files. Some files originating from ST are difficult to deal with (license wise) so it was left out of those. Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
249 lines
9.4 KiB
C
249 lines
9.4 KiB
C
/*
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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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#include <stdio.h>
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#include <string.h>
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#include <stm32f4xx_hal.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "misc.h"
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#include "obj.h"
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#include "pybstdio.h"
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#include "readline.h"
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#include "usb.h"
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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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#define READLINE_HIST_SIZE (8)
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static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
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enum { ESEQ_NONE, ESEQ_ESC, ESEQ_ESC_BRACKET, ESEQ_ESC_BRACKET_DIGIT, ESEQ_ESC_O };
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void readline_init(void) {
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memset(readline_hist, 0, READLINE_HIST_SIZE * sizeof(const char*));
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}
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STATIC char *str_dup(const char *str) {
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uint32_t len = strlen(str);
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char *s2 = m_new(char, len + 1);
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memcpy(s2, str, len);
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s2[len] = 0;
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return s2;
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}
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int readline(vstr_t *line, const char *prompt) {
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stdout_tx_str(prompt);
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int orig_line_len = line->len;
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int escape_seq = ESEQ_NONE;
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char escape_seq_buf[1] = {0};
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int hist_cur = -1;
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int cursor_pos = orig_line_len;
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for (;;) {
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int c = stdin_rx_chr();
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int last_line_len = line->len;
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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 (escape_seq == ESEQ_NONE) {
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if (VCP_CHAR_CTRL_A <= c && c <= VCP_CHAR_CTRL_D && vstr_len(line) == orig_line_len) {
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// control character with empty line
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return c;
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} else if (c == VCP_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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} else if (c == VCP_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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} else if (c == '\r') {
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// newline
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stdout_tx_str("\r\n");
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if (line->len > orig_line_len && (readline_hist[0] == NULL || strcmp(readline_hist[0], line->buf + orig_line_len) != 0)) {
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// a line which is not empty and different from the last one
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// so update the history
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for (int i = READLINE_HIST_SIZE - 1; i > 0; i--) {
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readline_hist[i] = readline_hist[i - 1];
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}
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readline_hist[0] = str_dup(line->buf + orig_line_len);
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}
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return 0;
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} else if (c == 27) {
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// escape sequence
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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 (cursor_pos > orig_line_len) {
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vstr_cut_out_bytes(line, cursor_pos - 1, 1);
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// set redraw parameters
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redraw_step_back = 1;
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redraw_from_cursor = true;
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}
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} else if (32 <= c && c <= 126) {
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// printable character
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vstr_ins_char(line, 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 (escape_seq == ESEQ_ESC) {
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switch (c) {
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case '[':
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escape_seq = ESEQ_ESC_BRACKET;
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break;
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case 'O':
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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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escape_seq = ESEQ_NONE;
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}
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} else if (escape_seq == ESEQ_ESC_BRACKET) {
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if ('0' <= c && c <= '9') {
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escape_seq = ESEQ_ESC_BRACKET_DIGIT;
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escape_seq_buf[0] = c;
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} else {
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escape_seq = ESEQ_NONE;
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if (c == 'A') {
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// up arrow
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if (hist_cur + 1 < READLINE_HIST_SIZE && readline_hist[hist_cur + 1] != NULL) {
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// increase hist num
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hist_cur += 1;
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// set line to history
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line->len = orig_line_len;
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vstr_add_str(line, readline_hist[hist_cur]);
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// set redraw parameters
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redraw_step_back = cursor_pos - orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = line->len - orig_line_len;
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}
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} else if (c == 'B') {
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// down arrow
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if (hist_cur >= 0) {
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// decrease hist num
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hist_cur -= 1;
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// set line to history
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vstr_cut_tail_bytes(line, line->len - orig_line_len);
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if (hist_cur >= 0) {
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vstr_add_str(line, readline_hist[hist_cur]);
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}
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// set redraw parameters
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redraw_step_back = cursor_pos - orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = line->len - orig_line_len;
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}
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} else if (c == 'C') {
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// right arrow
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if (cursor_pos < line->len) {
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redraw_step_forward = 1;
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}
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} else if (c == 'D') {
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// left arrow
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if (cursor_pos > orig_line_len) {
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redraw_step_back = 1;
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}
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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);
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}
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}
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} else if (escape_seq == ESEQ_ESC_BRACKET_DIGIT) {
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if (c == '~') {
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if (escape_seq_buf[0] == '1' || escape_seq_buf[0] == '7') {
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home_key:
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redraw_step_back = cursor_pos - orig_line_len;
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} else if (escape_seq_buf[0] == '4' || escape_seq_buf[0] == '8') {
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end_key:
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redraw_step_forward = line->len - cursor_pos;
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} else {
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DEBUG_printf("(ESC [ %c %d)", escape_seq_buf[0], c);
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}
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} else {
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DEBUG_printf("(ESC [ %c %d)", escape_seq_buf[0], c);
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}
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escape_seq = ESEQ_NONE;
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} else if (escape_seq == ESEQ_ESC_O) {
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switch (c) {
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case 'H':
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goto home_key;
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case 'F':
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goto end_key;
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default:
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DEBUG_printf("(ESC O %d)", c);
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escape_seq = ESEQ_NONE;
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}
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} else {
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escape_seq = ESEQ_NONE;
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}
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// redraw command prompt, efficiently
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// TODO we can probably use some more sophisticated VT100 commands here
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if (redraw_step_back > 0) {
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for (int i = 0; i < redraw_step_back; i++) {
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stdout_tx_str("\b");
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}
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cursor_pos -= redraw_step_back;
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}
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if (redraw_from_cursor) {
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if (line->len < last_line_len) {
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// erase old chars
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for (int i = cursor_pos; i < last_line_len; i++) {
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stdout_tx_str(" ");
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}
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// step back
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for (int i = cursor_pos; i < last_line_len; i++) {
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stdout_tx_str("\b");
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}
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}
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// draw new chars
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stdout_tx_strn(line->buf + cursor_pos, line->len - cursor_pos);
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// move cursor forward if needed (already moved forward by length of line, so move it back)
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for (int i = cursor_pos + redraw_step_forward; i < line->len; i++) {
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stdout_tx_str("\b");
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}
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cursor_pos += redraw_step_forward;
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} else if (redraw_step_forward > 0) {
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// draw over old chars to move cursor forwards
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stdout_tx_strn(line->buf + cursor_pos, redraw_step_forward);
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cursor_pos += redraw_step_forward;
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}
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HAL_Delay(1);
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}
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}
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