411 lines
13 KiB
C
411 lines
13 KiB
C
/*
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* HTML Source mode for QEmacs.
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*
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* Copyright (c) 2000-2018 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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static int get_html_entity(unsigned int *p)
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{
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unsigned int *p_start, c;
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p_start = p;
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c = *p;
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if (c != '&')
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return 0;
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c = *++p;
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if (c == '#') {
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c = *++p;
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if (c == 'x') {
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do {
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c = *++p;
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} while (qe_isxdigit(c));
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} else {
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while (qe_isdigit(c))
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c = *++p;
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}
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} else
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if (qe_isalpha(c)) {
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do {
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c = *++p;
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} while (qe_isalnum(c));
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} else {
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/* not an entity */
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return 0;
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}
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if (c == ';') {
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p++;
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}
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return p - p_start;
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}
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/* colorization states */
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enum {
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IN_HTML_COMMENT = 0x0001, /* <!-- ... --> */
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IN_HTML_COMMENT1 = 0x0002, /* <! ... > */
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IN_HTML_ENTITY = 0x0004, /* &name[;] / {[;] */
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IN_HTML_EMBEDDED = 0x00ff, /* flags for embedded php, js, css, c# */
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IN_HTML_TAG = 0x0100, /* <tag ... > */
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IN_HTML_STRING = 0x0200, /* <tag " ... " > */
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IN_HTML_STRING1 = 0x0400, /* <tag ' ... ' > */
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IN_HTML_SCRIPT = 0x1000, /* <script> [...] </script> */
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IN_HTML_STYLE = 0x2000, /* <style> [...] </style> */
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IN_HTML_PHP = 0x4000, /* <?php ... ?> */
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IN_HTML_ASP = 0x8000, /* <% ... %> */
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};
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enum {
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HTML_STYLE_PREPROCESS = QE_STYLE_PREPROCESS,
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HTML_STYLE_COMMENT = QE_STYLE_HTML_COMMENT,
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HTML_STYLE_COMMENT1 = QE_STYLE_HTML_COMMENT,
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HTML_STYLE_ENTITY = QE_STYLE_HTML_ENTITY,
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HTML_STYLE_STRING = QE_STYLE_HTML_STRING,
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HTML_STYLE_TAG = QE_STYLE_HTML_TAG,
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HTML_STYLE_CSS = QE_STYLE_CSS,
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};
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static int htmlsrc_tag_match(const unsigned int *buf, int i, const char *str,
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int *iend)
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{
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int len;
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if (ustristart(buf + i, str, &len)
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&& buf[i + len] != '-' && !qe_isalnum_(buf[i + len])) {
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if (iend)
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*iend = i + len;
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return 1;
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} else {
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return 0;
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}
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}
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static void htmlsrc_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, c, len;
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int state = cp->colorize_state;
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while (i < n) {
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start = i;
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if (state & IN_HTML_PHP) {
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for (; i < n; i++) {
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if (str[i] == '?' && str[i + 1] == '>')
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break;
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}
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c = str[i]; /* save char to set '\0' delimiter */
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str[i] = '\0';
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cp->colorize_state = state & IN_HTML_EMBEDDED;
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php_mode.colorize_func(cp, str + start, i - start, &php_mode);
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state &= ~IN_HTML_EMBEDDED;
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state |= cp->colorize_state & IN_HTML_EMBEDDED;
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str[i] = c;
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if (c) {
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state &= ~(IN_HTML_EMBEDDED | IN_HTML_PHP);
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start = i;
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i += 2;
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SET_COLOR(str, start, i, HTML_STYLE_PREPROCESS);
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}
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continue;
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}
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if (state & IN_HTML_ASP) {
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for (; i < n; i++) {
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if (str[i] == '%' && str[i + 1] == '>')
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break;
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}
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c = str[i]; /* save char to set '\0' delimiter */
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str[i] = '\0';
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cp->colorize_state = state & IN_HTML_EMBEDDED;
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csharp_mode.colorize_func(cp, str + start, i - start, &csharp_mode);
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state &= ~IN_HTML_EMBEDDED;
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state |= cp->colorize_state & IN_HTML_EMBEDDED;
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str[i] = c;
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if (c) {
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state &= ~(IN_HTML_EMBEDDED | IN_HTML_ASP);
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start = i;
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i += 2;
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SET_COLOR(str, start, i, HTML_STYLE_PREPROCESS);
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}
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continue;
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}
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if ((state & (IN_HTML_SCRIPT | IN_HTML_TAG)) == IN_HTML_SCRIPT) {
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for (; i < n; i++) {
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if (str[i] == '<'
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&& htmlsrc_tag_match(str, i + 1, "/script", NULL)) {
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break;
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}
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}
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c = str[i]; /* save char to set '\0' delimiter */
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str[i] = '\0';
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cp->colorize_state = state & IN_HTML_EMBEDDED;
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js_mode.colorize_func(cp, str + start, i - start, &js_mode);
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state &= ~IN_HTML_EMBEDDED;
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state |= cp->colorize_state & IN_HTML_EMBEDDED;
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str[i] = c;
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if (c) {
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state &= ~(IN_HTML_EMBEDDED | IN_HTML_SCRIPT);
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}
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continue;
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}
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if ((state & (IN_HTML_STYLE | IN_HTML_TAG)) == IN_HTML_STYLE) {
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for (; i < n; i++) {
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if (str[i] == '<'
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&& htmlsrc_tag_match(str, i + 1, "/style", NULL)) {
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break;
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}
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}
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c = str[i]; /* save char to set '\0' delimiter */
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str[i] = '\0';
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cp->colorize_state = state & IN_HTML_EMBEDDED;
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css_mode.colorize_func(cp, str + start, i - start, &css_mode);
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state &= ~IN_HTML_EMBEDDED;
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state |= cp->colorize_state & IN_HTML_EMBEDDED;
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str[i] = c;
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if (c) {
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state &= ~(IN_HTML_EMBEDDED | IN_HTML_STYLE);
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}
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continue;
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}
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if (state & IN_HTML_COMMENT) {
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for (; i < n; i++) {
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if (str[i] == '-' && str[i + 1] == '-' && str[i + 2] == '>') {
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i += 3;
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state &= ~(IN_HTML_COMMENT | IN_HTML_COMMENT1);
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break;
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}
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}
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SET_COLOR(str, start, i, HTML_STYLE_COMMENT);
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continue;
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}
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if (state & IN_HTML_COMMENT1) {
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for (; i < n; i++) {
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if (str[i] == '>') {
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i++;
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state &= ~IN_HTML_COMMENT1;
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break;
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}
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}
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SET_COLOR(str, start, i, HTML_STYLE_COMMENT1);
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continue;
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}
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if (state & IN_HTML_ENTITY) {
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if ((len = get_html_entity(str + i)) == 0)
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i++;
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else
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i += len;
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state &= ~IN_HTML_ENTITY;
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SET_COLOR(str, start, i, HTML_STYLE_ENTITY);
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continue;
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}
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if (state & (IN_HTML_STRING | IN_HTML_STRING1)) {
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int delim = (state & IN_HTML_STRING1) ? '\'' : '\"';
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for (; i < n; i++) {
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if (str[i] == '&' && get_html_entity(str + i)) {
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state |= IN_HTML_ENTITY;
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break;
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}
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if (str[i] == (unsigned int)delim) {
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i++;
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state &= ~(IN_HTML_STRING | IN_HTML_STRING1);
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break;
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}
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if (str[i] == '<'
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&& htmlsrc_tag_match(str, i, "<?php", NULL)) {
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SET_COLOR(str, start, i, HTML_STYLE_STRING);
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SET_COLOR(str, i, i + 5, HTML_STYLE_PREPROCESS);
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i += 5;
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start = i;
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state |= IN_HTML_PHP;
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break;
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} else
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if (str[i] == '<' && str[i + 1] == '%') {
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SET_COLOR(str, start, i, HTML_STYLE_STRING);
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SET_COLOR(str, i, i + 2, HTML_STYLE_PREPROCESS);
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i += 2;
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start = i;
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state |= IN_HTML_ASP;
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break;
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} else
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if (str[i] == '?' && str[i + 1] == '>') {
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/* special case embedded php script tags */
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i += 1;
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} else
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if (str[i] == '%' && str[i + 1] == '>') {
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/* special case embedded asp script tags */
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i += 1;
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} else
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if (str[i] == '>') {
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/* Premature end of string */
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state &= ~(IN_HTML_STRING | IN_HTML_STRING1);
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break;
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}
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}
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SET_COLOR(str, start, i, HTML_STYLE_STRING);
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continue;
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}
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if (state & IN_HTML_TAG) {
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for (; i < n; i++) {
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c = str[i];
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if (c == '&' && get_html_entity(str + i)) {
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state |= IN_HTML_ENTITY;
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break;
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}
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if (c == '\"') {
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state |= IN_HTML_STRING;
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break;
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}
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if (c == '\'') {
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state |= IN_HTML_STRING1;
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break;
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}
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if (c == '/' && str[i + 1] == '>') {
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i += 2;
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state = 0;
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break;
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}
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if (c == '>') {
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i++;
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state &= ~IN_HTML_TAG;
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break;
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}
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}
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SET_COLOR(str, start, i, HTML_STYLE_TAG);
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if (state & (IN_HTML_STRING | IN_HTML_STRING1)) {
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SET_COLOR1(str, i, HTML_STYLE_STRING);
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i++;
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}
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continue;
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}
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/* Plain text stream */
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for (; i < n; i++) {
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start = i;
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c = str[i];
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/* Kludge for preprocessed html */
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if (c == '#' && i == 0) {
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i = n;
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SET_COLOR(str, start, i, HTML_STYLE_PREPROCESS);
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break;
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}
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if (c == '<'
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&& htmlsrc_tag_match(str, i, "<?php", &i)) {
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SET_COLOR(str, start, i, HTML_STYLE_PREPROCESS);
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state |= IN_HTML_PHP;
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break;
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}
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if (c == '<' && str[i + 1] == '%') {
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i += 2;
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SET_COLOR(str, start, i, HTML_STYLE_PREPROCESS);
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state |= IN_HTML_ASP;
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break;
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}
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if (c == '<'
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&& (qe_isalpha(str[i + 1]) || str[i + 1] == '!'
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|| str[i + 1] == '/' || str[i + 1] == '?')) {
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state |= IN_HTML_TAG;
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if (htmlsrc_tag_match(str, i, "<script", NULL)) {
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state |= IN_HTML_SCRIPT;
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break;
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}
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if (htmlsrc_tag_match(str, i, "<style", NULL)) {
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state |= IN_HTML_STYLE;
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break;
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}
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if (str[i + 1] == '!') {
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state ^= IN_HTML_TAG ^ IN_HTML_COMMENT1;
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i += 2;
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if (str[i] == '-' && str[i + 1] == '-') {
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i += 2;
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state ^= IN_HTML_COMMENT ^ IN_HTML_COMMENT1;
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}
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SET_COLOR(str, start, i, HTML_STYLE_COMMENT);
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}
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break;
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}
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if (str[i] == '&' && get_html_entity(str + i)) {
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state |= IN_HTML_ENTITY;
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break;
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}
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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 html_tagcmp(const char *s1, const char *s2)
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{
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int d;
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while (*s2) {
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d = *s2 - qe_toupper(*s1);
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if (d)
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return d;
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s2++;
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s1++;
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}
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if (qe_isalnum_(*s1))
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return -1;
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return 0;
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}
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static int htmlsrc_mode_probe(ModeDef *mode, ModeProbeData *p)
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{
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const char *buf = cs8(p->buf);
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/* first check file extension */
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if (match_extension(p->filename, mode->extensions))
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return 85;
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/* then try buffer contents */
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if (buf[0] == '<'
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&& (!html_tagcmp(buf, "<HTML") ||
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!html_tagcmp(buf, "<SCRIPT") ||
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!html_tagcmp(buf, "<?XML") ||
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!html_tagcmp(buf, "<PLIST") ||
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!html_tagcmp(buf, "<!DOCTYPE"))) {
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return 85;
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}
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return 1;
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}
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/* specific htmlsrc commands */
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/* CG: need move / kill by tag level */
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static CmdDef htmlsrc_commands[] = {
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CMD_DEF_END,
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};
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ModeDef htmlsrc_mode = {
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.name = "html-src",
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.extensions = "html|htm|asp|aspx|shtml|hta|htp|phtml|"
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"php|php3|php4|xml|eex|plist",
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.mode_probe = htmlsrc_mode_probe,
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.colorize_func = htmlsrc_colorize_line,
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};
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static int htmlsrc_init(void)
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{
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qe_register_mode(&htmlsrc_mode, MODEF_SYNTAX);
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qe_register_cmd_table(htmlsrc_commands, &htmlsrc_mode);
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return 0;
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}
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qe_module_init(htmlsrc_init);
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