/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2013-2015 Damien P. George * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include "py/obj.h" #include "py/runtime.h" #include "py/builtin.h" #include "py/repl.h" #if MICROPY_HELPER_REPL STATIC bool str_startswith_word(const char *str, const char *head) { size_t i; for (i = 0; str[i] && head[i]; i++) { if (str[i] != head[i]) { return false; } } return head[i] == '\0' && (str[i] == '\0' || !unichar_isident(str[i])); } bool mp_repl_continue_with_input(const char *input) { // check for blank input if (input[0] == '\0') { return false; } // check if input starts with a certain keyword bool starts_with_compound_keyword = input[0] == '@' || str_startswith_word(input, "if") || str_startswith_word(input, "while") || str_startswith_word(input, "for") || str_startswith_word(input, "try") || str_startswith_word(input, "with") || str_startswith_word(input, "def") || str_startswith_word(input, "class") #if MICROPY_PY_ASYNC_AWAIT || str_startswith_word(input, "async") #endif ; // check for unmatched open bracket, quote or escape quote #define Q_NONE (0) #define Q_1_SINGLE (1) #define Q_1_DOUBLE (2) #define Q_3_SINGLE (3) #define Q_3_DOUBLE (4) int n_paren = 0; int n_brack = 0; int n_brace = 0; int in_quote = Q_NONE; const char *i; for (i = input; *i; i++) { if (*i == '\'') { if ((in_quote == Q_NONE || in_quote == Q_3_SINGLE) && i[1] == '\'' && i[2] == '\'') { i += 2; in_quote = Q_3_SINGLE - in_quote; } else if (in_quote == Q_NONE || in_quote == Q_1_SINGLE) { in_quote = Q_1_SINGLE - in_quote; } } else if (*i == '"') { if ((in_quote == Q_NONE || in_quote == Q_3_DOUBLE) && i[1] == '"' && i[2] == '"') { i += 2; in_quote = Q_3_DOUBLE - in_quote; } else if (in_quote == Q_NONE || in_quote == Q_1_DOUBLE) { in_quote = Q_1_DOUBLE - in_quote; } } else if (*i == '\\' && (i[1] == '\'' || i[1] == '"' || i[1] == '\\')) { if (in_quote != Q_NONE) { i++; } } else if (in_quote == Q_NONE) { switch (*i) { case '(': n_paren += 1; break; case ')': n_paren -= 1; break; case '[': n_brack += 1; break; case ']': n_brack -= 1; break; case '{': n_brace += 1; break; case '}': n_brace -= 1; break; default: break; } } } // continue if unmatched 3-quotes if (in_quote == Q_3_SINGLE || in_quote == Q_3_DOUBLE) { return true; } // continue if unmatched brackets, but only if not in a 1-quote if ((n_paren > 0 || n_brack > 0 || n_brace > 0) && in_quote == Q_NONE) { return true; } // continue if last character was backslash (for line continuation) if (i[-1] == '\\') { return true; } // continue if compound keyword and last line was not empty if (starts_with_compound_keyword && i[-1] != '\n') { return true; } // otherwise, don't continue return false; } size_t mp_repl_autocomplete(const char *str, size_t len, const mp_print_t *print, const char **compl_str) { // scan backwards to find start of "a.b.c" chain const char *org_str = str; const char *top = str + len; for (const char *s = top; --s >= str;) { if (!(unichar_isalpha(*s) || unichar_isdigit(*s) || *s == '_' || *s == '.')) { ++s; str = s; break; } } size_t nqstr = QSTR_TOTAL(); // begin search in outer global dict which is accessed from __main__ mp_obj_t obj = MP_OBJ_FROM_PTR(&mp_module___main__); mp_obj_t dest[2]; for (;;) { // get next word in string to complete const char *s_start = str; while (str < top && *str != '.') { ++str; } size_t s_len = str - s_start; if (str < top) { // a complete word, lookup in current object qstr q = qstr_find_strn(s_start, s_len); if (q == MP_QSTRnull) { // lookup will fail return 0; } mp_load_method_protected(obj, q, dest, true); obj = dest[0]; // attribute, method, or MP_OBJ_NULL if nothing found if (obj == MP_OBJ_NULL) { // lookup failed return 0; } // skip '.' to move to next word ++str; } else { // end of string, do completion on this partial name // look for matches const char *match_str = NULL; size_t match_len = 0; qstr q_first = 0, q_last = 0; for (qstr q = MP_QSTR_ + 1; q < nqstr; ++q) { size_t d_len; const char *d_str = (const char *)qstr_data(q, &d_len); // special case; filter out words that begin with underscore // unless there's already a partial match if (s_len == 0 && d_str[0] == '_') { continue; } if (s_len <= d_len && strncmp(s_start, d_str, s_len) == 0) { mp_load_method_protected(obj, q, dest, true); if (dest[0] != MP_OBJ_NULL) { if (match_str == NULL) { match_str = d_str; match_len = d_len; } else { // search for longest common prefix of match_str and d_str // (assumes these strings are null-terminated) for (size_t j = s_len; j <= match_len && j <= d_len; ++j) { if (match_str[j] != d_str[j]) { match_len = j; break; } } } if (q_first == 0) { q_first = q; } q_last = q; } } } // nothing found if (q_first == 0) { if (s_len == 0) { *compl_str = " "; return 4; } // If there're no better alternatives, and if it's first word // in the line, try to complete "import". if (s_start == org_str) { static const char import_str[] = "import "; if (memcmp(s_start, import_str, s_len) == 0) { *compl_str = import_str + s_len; return sizeof(import_str) - 1 - s_len; } } return 0; } // 1 match found, or multiple matches with a common prefix if (q_first == q_last || match_len > s_len) { *compl_str = match_str + s_len; return match_len - s_len; } // multiple matches found, print them out #define WORD_SLOT_LEN (16) #define MAX_LINE_LEN (4 * WORD_SLOT_LEN) int line_len = MAX_LINE_LEN; // force a newline for first word for (qstr q = q_first; q <= q_last; ++q) { size_t d_len; const char *d_str = (const char *)qstr_data(q, &d_len); if (s_len <= d_len && strncmp(s_start, d_str, s_len) == 0) { mp_load_method_protected(obj, q, dest, true); if (dest[0] != MP_OBJ_NULL) { int gap = (line_len + WORD_SLOT_LEN - 1) / WORD_SLOT_LEN * WORD_SLOT_LEN - line_len; if (gap < 2) { gap += WORD_SLOT_LEN; } if (line_len + gap + d_len <= MAX_LINE_LEN) { // TODO optimise printing of gap? for (int j = 0; j < gap; ++j) { mp_print_str(print, " "); } mp_print_str(print, d_str); line_len += gap + d_len; } else { mp_printf(print, "\n%s", d_str); line_len = d_len; } } } } mp_print_str(print, "\n"); return (size_t)(-1); // indicate many matches } } } #endif // MICROPY_HELPER_REPL