2 * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2016 Hiroyuki Yamamoto and the Claws Mail team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #define SC_HTMLBUFSIZE 8192
29 #define HR_STR "────────────────────────────────────────────────"
32 typedef struct _SC_HTMLSymbol SC_HTMLSymbol;
40 static SC_HTMLSymbol symbol_list[] = {
52 {"™", "\342\204\242"},
54 {"¡", "\302\241"},
55 {"¢", "\302\242"},
56 {"£", "\302\243"},
57 {"¤", "\302\244"},
58 {"¥", "\302\245"},
59 {"¦", "\302\246"},
60 {"§", "\302\247"},
61 {"¨", "\302\250"},
62 {"©", "\302\251"},
63 {"ª", "\302\252"},
64 {"«", "\302\253"},
65 {"¬", "\302\254"},
66 {"­", "\302\255"},
67 {"®", "\302\256"},
68 {"¯", "\302\257"},
69 {"°", "\302\260"},
70 {"±", "\302\261"},
71 {"²", "\302\262"},
72 {"³", "\302\263"},
73 {"´", "\302\264"},
74 {"µ", "\302\265"},
75 {"¶", "\302\266"},
76 {"·", "\302\267"},
77 {"¸", "\302\270"},
78 {"¹", "\302\271"},
79 {"º", "\302\272"},
80 {"»", "\302\273"},
81 {"¼", "\302\274"},
82 {"½", "\302\275"},
83 {"¾", "\302\276"},
84 {"¿", "\302\277"},
85 {"À", "\303\200"},
86 {"Á", "\303\201"},
87 {"Â", "\303\202"},
88 {"Ã", "\303\203"},
89 {"Ä", "\303\204"},
90 {"Å", "\303\205"},
91 {"Æ", "\303\206"},
92 {"Ç", "\303\207"},
93 {"È", "\303\210"},
94 {"É", "\303\211"},
95 {"Ê", "\303\212"},
96 {"Ë", "\303\213"},
97 {"Ì", "\303\214"},
98 {"Í", "\303\215"},
99 {"Î", "\303\216"},
100 {"Ï", "\303\217"},
101 {"Ð", "\303\220"},
102 {"Ñ", "\303\221"},
103 {"Ò", "\303\222"},
104 {"Ó", "\303\223"},
105 {"Ô", "\303\224"},
106 {"Õ", "\303\225"},
107 {"Ö", "\303\226"},
108 {"×", "\303\227"},
109 {"Ø", "\303\230"},
110 {"Ù", "\303\231"},
111 {"Ú", "\303\232"},
112 {"Û", "\303\233"},
113 {"Ü", "\303\234"},
114 {"Ý", "\303\235"},
115 {"Þ", "\303\236"},
116 {"ß", "\303\237"},
117 {"à", "\303\240"},
118 {"á", "\303\241"},
119 {"â", "\303\242"},
120 {"ã", "\303\243"},
121 {"ä", "\303\244"},
122 {"å", "\303\245"},
123 {"æ", "\303\246"},
124 {"ç", "\303\247"},
125 {"è", "\303\250"},
126 {"é", "\303\251"},
127 {"ê", "\303\252"},
128 {"ë", "\303\253"},
129 {"ì", "\303\254"},
130 {"í", "\303\255"},
131 {"î", "\303\256"},
132 {"ï", "\303\257"},
133 {"ð", "\303\260"},
134 {"ñ", "\303\261"},
135 {"ò", "\303\262"},
136 {"ó", "\303\263"},
137 {"ô", "\303\264"},
138 {"õ", "\303\265"},
139 {"ö", "\303\266"},
140 {"÷", "\303\267"},
141 {"ø", "\303\270"},
142 {"ù", "\303\271"},
143 {"ú", "\303\272"},
144 {"û", "\303\273"},
145 {"ü", "\303\274"},
146 {"ý", "\303\275"},
147 {"þ", "\303\276"},
148 {"ÿ", "\303\277"},
149 {"Œ", "\305\222"},
150 {"œ", "\305\223"},
151 {"Š", "\305\240"},
152 {"š", "\305\241"},
153 {"Ÿ", "\305\270"},
154 {"ˆ", "\313\206"},
155 {"˜", "\313\234"},
156 {" ", "\342\200\202"},
157 {" ", "\342\200\203"},
158 {" ", "\342\200\211"},
159 {"–", "\342\200\223"},
160 {"—", "\342\200\224"},
161 {"‘", "\342\200\230"},
162 {"’", "\342\200\231"},
163 {"‚", "\342\200\232"},
164 {"“", "\342\200\234"},
165 {"”", "\342\200\235"},
166 {"„", "\342\200\236"},
167 {"†", "\342\200\240"},
168 {"‡", "\342\200\241"},
169 {"•", "\342\200\242"},
170 {"…", "\342\200\246"},
171 {"‰", "\342\200\260"},
172 {"‹", "\342\200\271"},
173 {"›", "\342\200\272"},
174 {"€", "\342\202\254"},
175 {"™", "\342\204\242"},
183 {"¡", "\302\241"},
184 {"¢", "\302\242"},
185 {"£", "\302\243"},
186 {"¤", "\302\244"},
187 {"¥", "\302\245"},
188 {"¦", "\302\246"},
189 {"§", "\302\247"},
190 {"¨", "\302\250"},
191 {"©", "\302\251"},
192 {"ª", "\302\252"},
193 {"«", "\302\253"},
194 {"¬", "\302\254"},
195 {"­", "\302\255"},
196 {"®", "\302\256"},
197 {"¯", "\302\257"},
198 {"°", "\302\260"},
199 {"±", "\302\261"},
200 {"²", "\302\262"},
201 {"³", "\302\263"},
202 {"´", "\302\264"},
203 {"µ", "\302\265"},
204 {"¶", "\302\266"},
205 {"·", "\302\267"},
206 {"¸", "\302\270"},
207 {"¹", "\302\271"},
208 {"º", "\302\272"},
209 {"»", "\302\273"},
210 {"¼", "\302\274"},
211 {"½", "\302\275"},
212 {"¾", "\302\276"},
213 {"¿", "\302\277"},
214 {"À", "\303\200"},
215 {"Á", "\303\201"},
216 {"Â", "\303\202"},
217 {"Ã", "\303\203"},
218 {"Ä", "\303\204"},
219 {"Å", "\303\205"},
220 {"Æ", "\303\206"},
221 {"Ç", "\303\207"},
222 {"È", "\303\210"},
223 {"É", "\303\211"},
224 {"Ê", "\303\212"},
225 {"Ë", "\303\213"},
226 {"Ì", "\303\214"},
227 {"Í", "\303\215"},
228 {"Î", "\303\216"},
229 {"Ï", "\303\217"},
230 {"Ð", "\303\220"},
231 {"Ñ", "\303\221"},
232 {"Ò", "\303\222"},
233 {"Ó", "\303\223"},
234 {"Ô", "\303\224"},
235 {"Õ", "\303\225"},
236 {"Ö", "\303\226"},
237 {"×", "\303\227"},
238 {"Ø", "\303\230"},
239 {"Ù", "\303\231"},
240 {"Ú", "\303\232"},
241 {"Û", "\303\233"},
242 {"Ü", "\303\234"},
243 {"Ý", "\303\235"},
244 {"Þ", "\303\236"},
245 {"ß", "\303\237"},
246 {"à", "\303\240"},
247 {"á", "\303\241"},
248 {"â", "\303\242"},
249 {"ã", "\303\243"},
250 {"ä", "\303\244"},
251 {"å", "\303\245"},
252 {"æ", "\303\246"},
253 {"ç", "\303\247"},
254 {"è", "\303\250"},
255 {"é", "\303\251"},
256 {"ê", "\303\252"},
257 {"ë", "\303\253"},
258 {"ì", "\303\254"},
259 {"í", "\303\255"},
260 {"î", "\303\256"},
261 {"ï", "\303\257"},
262 {"ð", "\303\260"},
263 {"ñ", "\303\261"},
264 {"ò", "\303\262"},
265 {"ó", "\303\263"},
266 {"ô", "\303\264"},
267 {"õ", "\303\265"},
268 {"ö", "\303\266"},
269 {"÷", "\303\267"},
270 {"ø", "\303\270"},
271 {"ù", "\303\271"},
272 {"ú", "\303\272"},
273 {"û", "\303\273"},
274 {"ü", "\303\274"},
275 {"ý", "\303\275"},
276 {"þ", "\303\276"},
277 {"ÿ", "\303\277"},
278 {"Œ", "\305\222"},
279 {"œ", "\305\223"},
280 {"Š", "\305\240"},
281 {"š", "\305\241"},
282 {"Ÿ", "\305\270"},
283 {"ˆ", "\313\206"},
284 {"˜", "\313\234"},
285 {" ", "\342\200\202"},
286 {" ", "\342\200\203"},
287 {" ", "\342\200\211"},
288 {"–", "\342\200\223"},
289 {"—", "\342\200\224"},
290 {"‘", "\342\200\230"},
291 {"’", "\342\200\231"},
292 {"‚", "\342\200\232"},
293 {"“", "\342\200\234"},
294 {"”", "\342\200\235"},
295 {"„", "\342\200\236"},
296 {"†", "\342\200\240"},
297 {"‡", "\342\200\241"},
298 {"•", "\342\200\242"},
299 {"…", "\342\200\246"},
300 {"‰", "\342\200\260"},
301 {"‹", "\342\200\271"},
302 {"›", "\342\200\272"},
303 {"€", "\342\202\254"},
304 {"™", "\342\204\242"}
307 typedef struct _SC_HTMLAltSymbol SC_HTMLAltSymbol;
309 struct _SC_HTMLAltSymbol
315 static GHashTable *default_symbol_table;
317 static SC_HTMLState sc_html_read_line (SC_HTMLParser *parser);
318 static void sc_html_append_char (SC_HTMLParser *parser,
320 static void sc_html_append_str (SC_HTMLParser *parser,
323 static SC_HTMLState sc_html_parse_tag (SC_HTMLParser *parser);
324 static void sc_html_parse_special (SC_HTMLParser *parser);
325 static void sc_html_get_parenthesis (SC_HTMLParser *parser,
330 SC_HTMLParser *sc_html_parser_new(FILE *fp, CodeConverter *conv)
332 SC_HTMLParser *parser;
334 cm_return_val_if_fail(fp != NULL, NULL);
335 cm_return_val_if_fail(conv != NULL, NULL);
337 parser = g_new0(SC_HTMLParser, 1);
340 parser->str = g_string_new(NULL);
341 parser->buf = g_string_new(NULL);
342 parser->bufp = parser->buf->str;
343 parser->state = SC_HTML_NORMAL;
345 parser->newline = TRUE;
346 parser->empty_line = TRUE;
347 parser->space = FALSE;
351 #define SYMBOL_TABLE_ADD(table, list) \
355 for (i = 0; i < sizeof(list) / sizeof(list[0]); i++) \
356 g_hash_table_insert(table, list[i].key, list[i].val); \
358 #define SYMBOL_TABLE_REF_ADD(table, list) \
362 for (i = 0; i < sizeof(list) / sizeof(list[0]); i++) \
363 g_hash_table_insert(table, &list[i].key, list[i].val); \
366 if (!default_symbol_table) {
367 default_symbol_table =
368 g_hash_table_new(g_str_hash, g_str_equal);
369 SYMBOL_TABLE_ADD(default_symbol_table, symbol_list);
372 #undef SYMBOL_TABLE_ADD
373 #undef SYMBOL_TABLE_REF_ADD
375 parser->symbol_table = default_symbol_table;
380 void sc_html_parser_destroy(SC_HTMLParser *parser)
382 g_string_free(parser->str, TRUE);
383 g_string_free(parser->buf, TRUE);
384 g_free(parser->href);
388 gchar *sc_html_parse(SC_HTMLParser *parser)
390 parser->state = SC_HTML_NORMAL;
391 g_string_truncate(parser->str, 0);
393 if (*parser->bufp == '\0') {
394 g_string_truncate(parser->buf, 0);
395 parser->bufp = parser->buf->str;
396 if (sc_html_read_line(parser) == SC_HTML_EOF)
400 while (*parser->bufp != '\0') {
401 switch (*parser->bufp) {
404 st = sc_html_parse_tag(parser);
405 /* when we see an href, we need to flush the str
406 * buffer. Then collect all the chars until we
407 * see the end anchor tag
409 if (SC_HTML_HREF_BEG == st || SC_HTML_HREF == st)
410 return parser->str->str;
414 sc_html_parse_special(parser);
420 if (parser->bufp[0] == '\r' && parser->bufp[1] == '\n')
424 if (!parser->newline)
425 parser->space = TRUE;
432 sc_html_append_char(parser, *parser->bufp++);
436 return parser->str->str;
439 static SC_HTMLState sc_html_read_line(SC_HTMLParser *parser)
441 gchar buf[SC_HTMLBUFSIZE];
442 gchar buf2[SC_HTMLBUFSIZE];
446 if (parser->fp == NULL)
449 n = fread(buf, 1, sizeof(buf) - 1, parser->fp);
451 parser->state = SC_HTML_EOF;
456 if (conv_convert(parser->conv, buf2, sizeof(buf2), buf) < 0) {
457 index = parser->bufp - parser->buf->str;
459 conv_utf8todisp(buf2, sizeof(buf2), buf);
460 g_string_append(parser->buf, buf2);
462 parser->bufp = parser->buf->str + index;
464 return SC_HTML_CONV_FAILED;
467 index = parser->bufp - parser->buf->str;
469 g_string_append(parser->buf, buf2);
471 parser->bufp = parser->buf->str + index;
473 return SC_HTML_NORMAL;
476 static void sc_html_append_char(SC_HTMLParser *parser, gchar ch)
478 GString *str = parser->str;
480 if (!parser->pre && parser->space) {
481 g_string_append_c(str, ' ');
482 parser->space = FALSE;
485 g_string_append_c(str, ch);
487 parser->empty_line = FALSE;
489 parser->newline = TRUE;
490 if (str->len > 1 && str->str[str->len - 2] == '\n')
491 parser->empty_line = TRUE;
492 if (parser->indent > 0) {
493 gint i, n = parser->indent;
494 for (i = 0; i < n; i++)
495 g_string_append_c(str, '>');
496 g_string_append_c(str, ' ');
499 parser->newline = FALSE;
502 static void sc_html_append_str(SC_HTMLParser *parser, const gchar *str, gint len)
504 GString *string = parser->str;
506 if (!parser->pre && parser->space) {
507 g_string_append_c(string, ' ');
508 parser->space = FALSE;
511 if (len == 0) return;
513 g_string_append(string, str);
516 Xstrndup_a(s, str, len, return);
517 g_string_append(string, s);
520 parser->empty_line = FALSE;
521 if (string->len > 0 && string->str[string->len - 1] == '\n') {
522 parser->newline = TRUE;
523 if (string->len > 1 && string->str[string->len - 2] == '\n')
524 parser->empty_line = TRUE;
526 parser->newline = FALSE;
529 static SC_HTMLTag *sc_html_get_tag(const gchar *str)
535 cm_return_val_if_fail(str != NULL, NULL);
537 if (*str == '\0' || *str == '!') return NULL;
539 Xstrdup_a(tmp, str, return NULL);
541 tag = g_new0(SC_HTMLTag, 1);
543 for (tmpp = tmp; *tmpp != '\0' && !g_ascii_isspace(*tmpp); tmpp++)
547 tag->name = g_utf8_strdown(tmp, -1);
551 tag->name = g_utf8_strdown(tmp, -1);
554 while (*tmpp != '\0') {
561 while (g_ascii_isspace(*tmpp)) tmpp++;
564 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp) &&
567 if (*tmpp != '\0' && *tmpp != '=') {
569 while (g_ascii_isspace(*tmpp)) tmpp++;
574 while (g_ascii_isspace(*tmpp)) tmpp++;
576 if (*tmpp == '"' || *tmpp == '\'') {
581 if ((p = strchr(attr_value, quote)) == NULL) {
582 if (debug_get_mode()) {
583 g_warning("sc_html_get_tag(): syntax error in tag: '%s'",
586 gchar *cut = g_strndup(str, 100);
587 g_warning("sc_html_get_tag(): syntax error in tag: '%s%s'",
588 cut, strlen(str)>100?"...":".");
595 while (g_ascii_isspace(*tmpp)) tmpp++;
599 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp)) tmpp++;
606 g_strchomp(attr_name);
607 attr = g_new(SC_HTMLAttr, 1);
608 attr->name = g_utf8_strdown(attr_name, -1);
609 attr->value = g_strdup(attr_value);
610 tag->attr = g_list_append(tag->attr, attr);
616 static void sc_html_free_tag(SC_HTMLTag *tag)
621 while (tag->attr != NULL) {
622 SC_HTMLAttr *attr = (SC_HTMLAttr *)tag->attr->data;
626 tag->attr = g_list_remove(tag->attr, tag->attr->data);
631 static void decode_href(SC_HTMLParser *parser)
634 SC_HTMLParser *tparser = g_new0(SC_HTMLParser, 1);
636 tparser->str = g_string_new(NULL);
637 tparser->buf = g_string_new(parser->href);
638 tparser->bufp = tparser->buf->str;
639 tparser->symbol_table = default_symbol_table;
641 tmp = sc_html_parse(tparser);
643 g_free(parser->href);
644 parser->href = g_strdup(tmp);
646 sc_html_parser_destroy(tparser);
649 static SC_HTMLState sc_html_parse_tag(SC_HTMLParser *parser)
651 gchar buf[SC_HTMLBUFSIZE];
654 sc_html_get_parenthesis(parser, buf, sizeof(buf));
656 tag = sc_html_get_tag(buf);
658 parser->state = SC_HTML_UNKNOWN;
659 if (!tag) return SC_HTML_UNKNOWN;
661 if (!strcmp(tag->name, "br") || !strcmp(tag->name, "br/")) {
662 parser->space = FALSE;
663 sc_html_append_char(parser, '\n');
664 parser->state = SC_HTML_BR;
665 } else if (!strcmp(tag->name, "a")) {
668 for (cur = tag->attr; cur != NULL; cur = cur->next) {
669 if (cur->data && !strcmp(((SC_HTMLAttr *)cur->data)->name, "href")) {
670 g_free(parser->href);
671 parser->href = g_strdup(((SC_HTMLAttr *)cur->data)->value);
673 parser->state = SC_HTML_HREF_BEG;
677 if (parser->href == NULL)
678 parser->href = g_strdup("");
679 parser->state = SC_HTML_HREF_BEG;
680 } else if (!strcmp(tag->name, "/a")) {
681 parser->state = SC_HTML_HREF;
682 } else if (!strcmp(tag->name, "p")) {
683 parser->space = FALSE;
684 if (!parser->empty_line) {
685 parser->space = FALSE;
686 if (!parser->newline) sc_html_append_char(parser, '\n');
687 sc_html_append_char(parser, '\n');
689 parser->state = SC_HTML_PAR;
690 } else if (!strcmp(tag->name, "pre")) {
692 parser->state = SC_HTML_PRE;
693 } else if (!strcmp(tag->name, "/pre")) {
695 parser->state = SC_HTML_NORMAL;
696 } else if (!strcmp(tag->name, "hr")) {
697 if (!parser->newline) {
698 parser->space = FALSE;
699 sc_html_append_char(parser, '\n');
701 sc_html_append_str(parser, HR_STR, -1);
702 sc_html_append_char(parser, '\n');
703 parser->state = SC_HTML_HR;
704 } else if (!strcmp(tag->name, "div") ||
705 !strcmp(tag->name, "ul") ||
706 !strcmp(tag->name, "li") ||
707 !strcmp(tag->name, "table") ||
708 !strcmp(tag->name, "dd") ||
709 !strcmp(tag->name, "tr") ||
710 (tag->name[0] == 'h' && g_ascii_isdigit(tag->name[1]))) {
711 if (!parser->newline) {
712 parser->space = FALSE;
713 sc_html_append_char(parser, '\n');
715 if (!strcmp(tag->name, "li")) {
716 sc_html_append_str(parser, LI_STR, -1);
718 parser->state = SC_HTML_NORMAL;
719 } else if (!strcmp(tag->name, "blockquote")) {
720 parser->state = SC_HTML_NORMAL;
722 } else if (!strcmp(tag->name, "/blockquote")) {
723 parser->state = SC_HTML_NORMAL;
725 } else if (!strcmp(tag->name, "/table") ||
726 (tag->name[0] == '/' &&
727 tag->name[1] == 'h' &&
728 g_ascii_isdigit(tag->name[1]))) {
729 if (!parser->empty_line) {
730 parser->space = FALSE;
731 if (!parser->newline) sc_html_append_char(parser, '\n');
732 sc_html_append_char(parser, '\n');
734 parser->state = SC_HTML_NORMAL;
735 } else if (!strcmp(tag->name, "/div") ||
736 !strcmp(tag->name, "/ul") ||
737 !strcmp(tag->name, "/li")) {
738 if (!parser->newline) {
739 parser->space = FALSE;
740 sc_html_append_char(parser, '\n');
742 parser->state = SC_HTML_NORMAL;
745 sc_html_free_tag(tag);
747 return parser->state;
750 static void sc_html_parse_special(SC_HTMLParser *parser)
752 gchar symbol_name[9];
756 parser->state = SC_HTML_UNKNOWN;
757 cm_return_if_fail(*parser->bufp == '&');
760 for (n = 0; parser->bufp[n] != '\0' && parser->bufp[n] != ';'; n++)
762 if (n > 7 || parser->bufp[n] != ';') {
763 /* output literal `&' */
764 sc_html_append_char(parser, *parser->bufp++);
765 parser->state = SC_HTML_NORMAL;
768 strncpy2(symbol_name, parser->bufp, n + 2);
769 parser->bufp += n + 1;
771 if ((val = g_hash_table_lookup(parser->symbol_table, symbol_name))
773 sc_html_append_str(parser, val, -1);
774 parser->state = SC_HTML_NORMAL;
778 sc_html_append_str(parser, symbol_name, -1);
781 static gchar *sc_html_find_tag(SC_HTMLParser *parser, const gchar *tag)
783 gchar *cur = parser->bufp;
784 gint len = strlen(tag);
789 while ((cur = strstr(cur, "<")) != NULL) {
790 if (!g_ascii_strncasecmp(cur, tag, len))
797 static void sc_html_get_parenthesis(SC_HTMLParser *parser, gchar *buf, gint len)
802 cm_return_if_fail(*parser->bufp == '<');
804 /* ignore comment / CSS / script stuff */
805 if (!strncmp(parser->bufp, "<!--", 4)) {
807 while ((p = strstr(parser->bufp, "-->")) == NULL)
808 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
809 parser->bufp = p + 3;
812 if (!g_ascii_strncasecmp(parser->bufp, "<style", 6)) {
814 while ((p = sc_html_find_tag(parser, "</style>")) == NULL)
815 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
816 parser->bufp = p + 8;
819 if (!g_ascii_strncasecmp(parser->bufp, "<script", 7)) {
821 while ((p = sc_html_find_tag(parser, "</script>")) == NULL)
822 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
823 parser->bufp = p + 9;
828 while ((p = strchr(parser->bufp, '>')) == NULL)
829 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
831 strncpy2(buf, parser->bufp, MIN(p - parser->bufp + 1, len));
833 parser->bufp = p + 1;