3b4f3c9f48
- add ada basic fortran haskell lua pascal python ruby smalltalk sql vimscript modes as separate modules
511 lines
16 KiB
C
511 lines
16 KiB
C
/*
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* Ruby language mode for QEmacs.
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*
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* Copyright (c) 2000-2020 Charlie Gordon.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "qe.h"
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/*---------------- Ruby script coloring ----------------*/
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static char const ruby_keywords[] = {
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"|__ENCODING__|__END__|__FILE__|__LINE__"
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"|BEGIN|END|alias|and|assert|begin|break"
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"|call|case|catch|class|def|defined?|do"
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"|else|elsif|end|ensure|eval|exit|extend"
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"|false|for|if|in|include|lambda|lambda?|loop"
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"|module|new|next|nil|not|or|private|proc"
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"|raise|refute|require|rescue|retry|return"
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"|self|super|then|throw|true|unless|until"
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"|when|while|yield"
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"|"
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};
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/* Ruby operators:
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* ` + - +@ -@ * / % << >> < <= > >= =
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* == === <=> [] []= ** ! ~ != !~ =~ & | ^
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*/
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enum {
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IN_RUBY_HEREDOC = 0x80,
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IN_RUBY_HD_INDENT = 0x40,
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IN_RUBY_HD_SIG = 0x3f,
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IN_RUBY_COMMENT = 0x40,
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IN_RUBY_STRING = 0x20 /* single quote */,
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IN_RUBY_STRING2 = 0x10 /* double quote */,
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IN_RUBY_STRING3 = 0x08 /* back quote */,
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IN_RUBY_STRING4 = 0x04 /* %q{...} */,
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IN_RUBY_REGEX = 0x02,
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IN_RUBY_POD = 0x01,
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};
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enum {
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RUBY_STYLE_TEXT = QE_STYLE_DEFAULT,
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RUBY_STYLE_COMMENT = QE_STYLE_COMMENT,
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RUBY_STYLE_STRING = QE_STYLE_STRING,
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RUBY_STYLE_STRING2 = QE_STYLE_STRING,
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RUBY_STYLE_STRING3 = QE_STYLE_STRING,
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RUBY_STYLE_STRING4 = QE_STYLE_STRING,
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RUBY_STYLE_REGEX = QE_STYLE_STRING_Q,
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RUBY_STYLE_NUMBER = QE_STYLE_NUMBER,
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RUBY_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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RUBY_STYLE_FUNCTION = QE_STYLE_FUNCTION,
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RUBY_STYLE_MEMBER = QE_STYLE_VARIABLE,
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RUBY_STYLE_HEREDOC = QE_STYLE_PREPROCESS,
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};
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static int ruby_get_name(char *buf, int size, unsigned int *str)
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{
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int len, i = 0, j;
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for (len = 0, j = i; qe_isalnum_(str[j]); j++) {
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if (len < size - 1)
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buf[len++] = str[j];
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}
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if (str[j] == '?' || str[j] == '!') {
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if (len < size - 1)
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buf[len++] = str[j];
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j++;
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}
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if (len < size) {
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buf[len] = '\0';
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}
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return j - i;
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}
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static void ruby_colorize_line(QEColorizeContext *cp,
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unsigned int *str, int n, ModeDef *syn)
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{
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int i = 0, j, start = i, c, style = 0, indent, sig;
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static int sep, sep0, level; /* XXX: ugly patch */
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int state = cp->colorize_state;
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char kbuf[64];
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for (indent = 0; qe_isblank(str[indent]); indent++)
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continue;
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if (state & IN_RUBY_HEREDOC) {
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if (state & IN_RUBY_HD_INDENT) {
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while (qe_isblank(str[i]))
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i++;
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}
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sig = 0;
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if (qe_isalpha_(str[i])) {
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sig = str[i++] % 61;
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for (; qe_isalnum_(str[i]); i++) {
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sig = ((sig << 6) + str[i]) % 61;
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}
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}
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for (; qe_isblank(str[i]); i++)
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continue;
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i = n;
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SET_COLOR(str, start, i, RUBY_STYLE_HEREDOC);
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if (i > 0 && i == n && (state & IN_RUBY_HD_SIG) == (sig & IN_RUBY_HD_SIG))
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state &= ~(IN_RUBY_HEREDOC | IN_RUBY_HD_INDENT | IN_RUBY_HD_SIG);
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} else {
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if (state & IN_RUBY_COMMENT)
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goto parse_c_comment;
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if (state & IN_RUBY_REGEX)
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goto parse_regex;
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if (state & IN_RUBY_STRING)
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goto parse_string;
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if (state & IN_RUBY_STRING2)
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goto parse_string2;
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if (state & IN_RUBY_STRING3)
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goto parse_string3;
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if (state & IN_RUBY_STRING4)
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goto parse_string4;
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if (str[i] == '=' && qe_isalpha(str[i + 1])) {
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state |= IN_RUBY_POD;
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}
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if (state & IN_RUBY_POD) {
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if (ustrstart(str + i, "=end", NULL)) {
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state &= ~IN_RUBY_POD;
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}
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style = RUBY_STYLE_COMMENT;
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if (str[i] == '=' && qe_isalpha(str[i + 1]))
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style = RUBY_STYLE_KEYWORD;
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i = n;
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SET_COLOR(str, start, i, style);
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}
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}
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while (i < n && qe_isblank(str[i]))
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i++;
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indent = i;
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while (i < n) {
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start = i;
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c = str[i++];
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switch (c) {
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case '/':
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if (str[i] == '*') {
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/* C comment */
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i++;
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parse_c_comment:
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state = IN_RUBY_COMMENT;
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for (; i < n; i++) {
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if (str[i] == '*' && str[i + 1] == '/') {
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i += 2;
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state &= ~IN_RUBY_COMMENT;
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break;
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}
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}
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goto comment;
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}
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if (start == indent
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|| (str[i] != ' ' && str[i] != '='
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&& i >= 2
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&& !qe_isalnum(str[i - 2] & CHAR_MASK)
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&& (str[i - 2] & CHAR_MASK) != ')')) {
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/* XXX: should use context to tell regex from divide */
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/* parse regex */
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state = IN_RUBY_REGEX;
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parse_regex:
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while (i < n) {
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/* XXX: should ignore / inside char classes */
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == '#' && str[i] == '{') {
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/* should parse full syntax */
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while (i < n && str[i++] != '}')
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continue;
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} else
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if (c == '/') {
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while (qe_findchar("ensuimox", str[i])) {
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i++;
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}
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state = 0;
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break;
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}
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}
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style = RUBY_STYLE_REGEX;
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break;
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}
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continue;
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case '#':
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i = n;
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comment:
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style = RUBY_STYLE_COMMENT;
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break;
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case '%':
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/* parse alternate string/array syntaxes */
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if (str[i] != '\0' && !qe_isblank(str[i]) && !qe_isalnum(str[i]))
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goto has_string4;
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if (str[i] == 'q' || str[i] == 'Q'
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|| str[i] == 'r' || str[i] == 'x'
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|| str[i] == 'w' || str[i] == 'W') {
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i++;
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has_string4:
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level = 0;
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sep = sep0 = str[i++];
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if (sep == '{') sep = '}';
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if (sep == '(') sep = ')';
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if (sep == '[') sep = ']';
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if (sep == '<') sep = '>';
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/* parse special string const */
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state = IN_RUBY_STRING4;
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parse_string4:
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while (i < n) {
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c = str[i++];
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if (c == sep) {
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if (level-- == 0) {
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state = level = 0;
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break;
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}
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/* XXX: should parse regex modifiers if %r */
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} else
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if (c == sep0) {
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level++;
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} else
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if (c == '#' && str[i] == '{') {
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/* XXX: should no parse if %q */
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/* XXX: should parse full syntax */
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while (i < n && str[i++] != '}')
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continue;
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} else
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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}
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}
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style = RUBY_STYLE_STRING4;
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break;
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}
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continue;
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case '\'':
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/* parse single quoted string const */
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state = IN_RUBY_STRING;
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parse_string:
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while (i < n) {
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c = str[i++];
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if (c == '\\' && (str[i] == '\\' || str[i] == '\'')) {
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i += 1;
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} else
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if (c == '\'') {
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state = 0;
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break;
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}
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}
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style = RUBY_STYLE_STRING;
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break;
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case '`':
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/* parse single quoted string const */
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state = IN_RUBY_STRING3;
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parse_string3:
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while (i < n) {
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c = str[i++];
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if (c == '\\' && (str[i] == '\\' || str[i] == '\'')) {
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i += 1;
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} else
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if (c == '#' && str[i] == '{') {
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/* should parse full syntax */
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while (i < n && str[i++] != '}')
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continue;
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} else
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if (c == '`') {
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state = 0;
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break;
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}
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}
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style = RUBY_STYLE_STRING3;
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break;
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case '\"':
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/* parse double quoted string const */
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parse_string2:
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c = '\0';
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while (i < n) {
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == '#' && str[i] == '{') {
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/* should parse full syntax */
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while (i < n && str[i++] != '}')
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continue;
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} else
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if (c == '\"') {
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break;
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}
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}
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if (c == '\"') {
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if (state == IN_RUBY_STRING2)
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state = 0;
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} else {
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if (state == 0)
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state = IN_RUBY_STRING2;
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}
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style = RUBY_STYLE_STRING2;
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break;
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case '<':
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if (str[i] == '<') {
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/* XXX: should use context to tell lshift from heredoc:
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* here documents are introduced by monadic <<.
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* Monadic use could be detected in some contexts, such
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* as eval(<<EOS), but not in the general case.
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* We use a heuristical approach: let's assume here
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* document ids are not separated from the << by white
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* space.
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* XXX: should parse full here document syntax.
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*/
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sig = 0;
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j = i + 1;
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if (str[j] == '-') {
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j++;
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}
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if ((str[j] == '\'' || str[j] == '\"')
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&& qe_isalpha_(str[j + 1])) {
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sep = str[j++];
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sig = str[j++] % 61;
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for (; qe_isalnum_(str[j]); j++) {
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sig = ((sig << 6) + str[j]) % 61;
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}
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if (str[j++] != (unsigned int)sep)
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break;
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} else
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if (qe_isalpha_(str[j])) {
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sig = str[j++] % 61;
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for (; qe_isalnum_(str[j]); j++) {
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sig = ((sig << 6) + str[j]) % 61;
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}
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}
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if (sig) {
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/* Multiple here documents can be specified on the
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* same line, only the last one will prevail, which
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* is OK for coloring purposes.
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* state will be cleared if a string or a comment
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* start on the line after the << operator. This
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* is a bug due to limited state bits.
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*/
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state &= ~(IN_RUBY_HEREDOC | IN_RUBY_HD_INDENT | IN_RUBY_HD_SIG);
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state |= IN_RUBY_HEREDOC;
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if (str[i + 1] == '-') {
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state |= IN_RUBY_HD_INDENT;
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}
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state |= (sig & IN_RUBY_HD_SIG);
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i = j;
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style = RUBY_STYLE_HEREDOC;
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break;
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}
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}
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continue;
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case '?':
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/* XXX: should parse character constants */
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continue;
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case '.':
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if (qe_isdigit_(str[i]))
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goto parse_decimal;
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continue;
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case '$':
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/* XXX: should parse precise $ syntax,
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* skip $" and $' for now
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*/
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if (i < n)
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i++;
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continue;
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case ':':
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/* XXX: should parse Ruby symbol */
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continue;
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case '@':
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i += ruby_get_name(kbuf, countof(kbuf), str + i);
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style = RUBY_STYLE_MEMBER;
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break;
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default:
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if (qe_isdigit(c)) {
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if (c == '0' && qe_tolower(str[i]) == 'b') {
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/* binary numbers */
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for (i += 1; qe_isbindigit_(str[i]); i++)
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continue;
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} else
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if (c == '0' && qe_tolower(str[i]) == 'o') {
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/* octal numbers */
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for (i += 1; qe_isoctdigit_(str[i]); i++)
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continue;
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} else
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if (c == '0' && qe_tolower(str[i]) == 'x') {
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/* hexadecimal numbers */
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for (i += 1; qe_isxdigit_(str[i]); i++)
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continue;
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} else
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if (c == '0' && qe_tolower(str[i]) == 'd') {
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/* hexadecimal numbers */
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for (i += 1; qe_isdigit_(str[i]); i++)
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continue;
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} else {
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/* decimal numbers */
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for (; qe_isdigit_(str[i]); i++)
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continue;
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if (str[i] == '.') {
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i++;
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parse_decimal:
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for (; qe_isdigit_(str[i]); i++)
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continue;
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}
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if (qe_tolower(str[i]) == 'e') {
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int k = i + 1;
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if (str[k] == '+' || str[k] == '-')
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k++;
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if (qe_isdigit_(str[k])) {
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for (i = k + 1; qe_isdigit_(str[i]); i++)
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continue;
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}
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}
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}
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/* XXX: should detect malformed number constants */
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style = RUBY_STYLE_NUMBER;
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break;
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}
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if (qe_isalpha_(c)) {
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i--;
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i += ruby_get_name(kbuf, countof(kbuf), str + i);
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if (strfind(syn->keywords, kbuf)) {
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style = RUBY_STYLE_KEYWORD;
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break;
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}
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if (qe_isblank(str[i]))
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i++;
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if (str[i] == '(' || str[i] == '{') {
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style = RUBY_STYLE_FUNCTION;
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break;
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}
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continue;
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}
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continue;
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}
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if (style) {
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SET_COLOR(str, start, i, style);
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style = 0;
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}
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}
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cp->colorize_state = state;
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}
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static int ruby_mode_probe(ModeDef *mode, ModeProbeData *p)
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{
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if (match_extension(p->filename, mode->extensions)
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|| match_shell_handler(cs8(p->buf), mode->shell_handlers)
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|| stristart(p->filename, "Rakefile", NULL)) {
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return 80;
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}
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return 1;
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}
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static ModeDef ruby_mode = {
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.name = "Ruby",
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.extensions = "rb|gemspec",
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.shell_handlers = "ruby",
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.mode_probe = ruby_mode_probe,
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.keywords = ruby_keywords,
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.colorize_func = ruby_colorize_line,
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};
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static int ruby_init(void)
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{
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qe_register_mode(&ruby_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(ruby_init);
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