277 lines
8.1 KiB
C
277 lines
8.1 KiB
C
/*
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* Vim script mode for QEmacs.
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*
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* Copyright (c) 2000-2023 Charlie Gordon.
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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
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* THE 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 "qe.h"
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/*---------------- Vim/Visual Vim coloring ----------------*/
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static char const vim_cmd_keywords[] = {
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/* Only a subset of commands are recognized */
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"|brea[k]|cal[l]|cat[ch]|command|con[tinue]|delc[ommand]"
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"|delf[unction]|el[se]|elsei[f]|end|endfo[r]|endfu[nction]|endi[f]"
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"|endt[ry]|endw[hile]|ex[ecute]|fina[lly]|fini[sh]|for"
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"|fun[ction]|if|hi[ghlight]|let|norm|pu[t]|redraws[tatus]|res[ize]"
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"|retu[rn]|ru[ntime]|se[t]|setl[ocal]|sil[ent]|syn|synt[ax]"
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"|try|unl[et]|ve[rsion]|wh[ile]|y[ank]"
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"|"
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};
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static char const vim_keywords[] = {
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"|self|in"
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"|"
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};
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static char const vim_syn_keywords[] = {
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"|case|ignore|match|keyword|include|cluster|region|sync|clear"
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"|nextgroup|contained|contains|display|oneline|start|end"
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"|skipwhite|keepend|excludenl|skipnl|skip|keepend|fromstart"
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"|minlines|maxlines|containedin|extend|transparent|fold"
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"|matchgroup|add|grouphere|groupthere|linebreaks"
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"|"
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};
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enum {
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VIM_STYLE_TEXT = QE_STYLE_DEFAULT,
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VIM_STYLE_COMMENT = QE_STYLE_COMMENT,
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VIM_STYLE_STRING = QE_STYLE_STRING,
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VIM_STYLE_REGEX = QE_STYLE_STRING,
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VIM_STYLE_NUMBER = QE_STYLE_NUMBER,
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VIM_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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VIM_STYLE_IDENTIFIER = QE_STYLE_DEFAULT,
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VIM_STYLE_FUNCTION = QE_STYLE_FUNCTION,
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};
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enum {
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VIM_STATE_CMD,
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VIM_STATE_ARG,
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VIM_STATE_SYN,
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};
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static int is_vim_keyword(const char32_t *str, int from, int to,
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const char *list)
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{
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char keyword[16];
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const char *p;
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int i, len = to - from;
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char32_t c;
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if (len >= ssizeof(keyword))
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return 0;
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for (i = 0; i < len; i++) {
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c = str[from + i];
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if (c >= 0x80)
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return 0;
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keyword[i] = c;
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}
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keyword[len] = '\0';
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/* check for exact match or non ambiguous prefix */
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for (p = list; *p != '\0';) {
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for (i = 0;
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p[i] != '\0' && p[i] != ' ' && p[i] != '[' && p[i] != '|';
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i++) {
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continue;
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}
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if (i <= len && !memcmp(p, keyword, i)) {
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if (i == len)
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return 1;
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if (p[i] == '[' && !memcmp(p + i + 1, keyword + i, len - i))
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return 1;
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}
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for (p += i; *p != '\0' && (c = *p++) != ' ' && c != '|';)
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continue;
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}
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return 0;
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}
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static void vim_colorize_line(QEColorizeContext *cp,
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char32_t *str, int n, ModeDef *syn)
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{
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int i = 0, j, start, state, comm, level, style;
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char32_t c;
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while (qe_isblank(str[i])) {
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i++;
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}
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if (str[i] == '\\') {
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i++;
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level = cp->colorize_state & 15;
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state = cp->colorize_state >> 4;
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comm = 0;
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} else {
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state = VIM_STATE_CMD;
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level = 0;
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comm = 1;
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}
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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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comm = 0;
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/* parse string const */
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while (i < n) {
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if (str[i++] == c)
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break;
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}
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SET_COLOR(str, start, i, VIM_STYLE_STRING);
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continue;
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case '/':
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if (state == VIM_STATE_SYN
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&& (qe_isblank(str[i - 2]) || str[i - 2] == '=')) {
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/* parse regex */
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while (i < n) {
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if (str[i] == '\\' && i + 1 < n) {
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i += 2;
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} else
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if (str[i++] == c)
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break;
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}
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SET_COLOR(str, start, i, VIM_STYLE_REGEX);
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continue;
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}
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break;
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case '+':
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if (state == VIM_STATE_SYN
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&& (qe_isblank(str[i - 2]) || str[i - 2] == '=')) {
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/* parse string const */
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for (j = i; j < n;) {
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if (str[j++] == c) {
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i = j;
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SET_COLOR(str, start, i, VIM_STYLE_STRING);
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break;
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}
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}
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continue;
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}
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break;
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case '\"':
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if (comm) {
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i = n;
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SET_COLOR(str, start, i, VIM_STYLE_COMMENT);
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continue;
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}
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/* parse string const */
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style = VIM_STYLE_COMMENT;
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while (i < n) {
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if (str[i] == '\\' && i + 1 < n) {
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i += 2;
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} else
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if (str[i++] == c) {
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style = VIM_STYLE_STRING;
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break;
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}
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}
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SET_COLOR(str, start, i, style);
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continue;
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case '|':
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if (str[i] == '|') {
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i++;
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} else {
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state = VIM_STATE_CMD;
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comm = 1;
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}
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continue;
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case '(':
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comm = 0;
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level++;
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continue;
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case ')':
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level--;
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if (!level)
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comm = 1;
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continue;
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case ' ':
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case '\t':
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case ',':
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case '$':
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continue;
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default:
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comm = 0;
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break;
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}
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/* parse numbers */
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if (qe_isdigit(c)) {
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for (; i < n; i++) {
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if (!qe_isalnum(str[i]) && str[i] != '.')
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break;
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}
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SET_COLOR(str, start, i, VIM_STYLE_NUMBER);
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continue;
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}
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/* parse identifiers and keywords */
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if (qe_isalpha_(c)) {
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for (; i < n; i++) {
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if (!qe_isalnum_(str[i]) && str[i] != '#')
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break;
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}
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style = VIM_STYLE_IDENTIFIER;
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if (state == VIM_STATE_CMD) {
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state = VIM_STATE_ARG;
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if (is_vim_keyword(str, start, i, vim_cmd_keywords)) {
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if (is_vim_keyword(str, start, i, "syn[tax]")) {
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state = VIM_STATE_SYN;
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}
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if (str[i] == '!')
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i++;
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style = VIM_STYLE_KEYWORD;
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}
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} else
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if (state == VIM_STATE_SYN) {
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if (is_vim_keyword(str, start, i, vim_syn_keywords)) {
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style = VIM_STYLE_KEYWORD;
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}
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} else {
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if (is_vim_keyword(str, start, i, vim_keywords)) {
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style = VIM_STYLE_KEYWORD;
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}
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}
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if (style == VIM_STYLE_IDENTIFIER) {
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if (check_fcall(str, i))
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style = VIM_STYLE_FUNCTION;
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}
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SET_COLOR(str, start, i, style);
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continue;
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}
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}
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cp->colorize_state = (state << 4) | (level & 15);
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}
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static ModeDef vim_mode = {
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.name = "Vim",
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.extensions = "vim",
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.colorize_func = vim_colorize_line,
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};
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static int vim_init(void)
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{
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qe_register_mode(&vim_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(vim_init);
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