145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
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* Postscript 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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/*---------------- PostScript colors ----------------*/
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enum {
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IN_PS_STRING = 0x0F /* ( ... ) level */,
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IN_PS_COMMENT = 0x10,
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};
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enum {
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PS_STYLE_TEXT = QE_STYLE_DEFAULT,
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PS_STYLE_COMMENT = QE_STYLE_COMMENT,
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PS_STYLE_STRING = QE_STYLE_STRING,
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PS_STYLE_NUMBER = QE_STYLE_DEFAULT,
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PS_STYLE_IDENTIFIER = QE_STYLE_FUNCTION,
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};
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#define wrap 0
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static void ps_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, start = i, c;
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int colstate = cp->colorize_state;
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if (colstate & IN_PS_COMMENT)
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goto in_comment;
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if (colstate & IN_PS_STRING)
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goto in_string;
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colstate = 0;
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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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/* Should deal with '<...>' '<<...>>' '<~...~>' tokens. */
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case '%':
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in_comment:
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if (wrap)
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colstate |= IN_PS_COMMENT;
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else
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colstate &= ~IN_PS_COMMENT;
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i = n;
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SET_COLOR(str, start, i, PS_STYLE_COMMENT);
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continue;
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case '(':
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colstate++;
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in_string:
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/* parse string skipping embedded \\ */
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while (i < n) {
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switch (str[i++]) {
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case '(':
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colstate++;
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continue;
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case ')':
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colstate--;
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if (!(colstate & IN_PS_STRING))
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break;
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continue;
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case '\\':
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if (i == n)
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break;
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i++;
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continue;
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default:
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continue;
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}
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break;
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}
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SET_COLOR(str, start, i, PS_STYLE_STRING);
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continue;
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default:
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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, PS_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_findchar(" \t\r\n,()<>[]{}/", str[i]))
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break;
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}
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SET_COLOR(str, start, i, PS_STYLE_IDENTIFIER);
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continue;
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}
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}
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cp->colorize_state = colstate;
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#undef wrap
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}
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static int ps_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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return 80;
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if (*p->buf == '%' && qe_stristr((const char *)p->buf, "script"))
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return 40;
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return 1;
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}
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static ModeDef ps_mode = {
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.name = "Postscript",
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.extensions = "ps|ms|eps",
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.mode_probe = ps_mode_probe,
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.colorize_func = ps_colorize_line,
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};
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static int ps_init(void)
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{
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qe_register_mode(&ps_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(ps_init);
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