2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2007 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/>.
29 #define SC_HTMLBUFSIZE 8192
30 #define HR_STR "------------------------------------------------"
32 typedef struct _SC_HTMLSymbol SC_HTMLSymbol;
40 static SC_HTMLSymbol symbol_list[] = {
47 {"™", "\342\204\242"},
49 {"¡", "\302\241"},
50 {"¢", "\302\242"},
51 {"£", "\302\243"},
52 {"¤", "\302\244"},
53 {"¥", "\302\245"},
54 {"¦", "\302\246"},
55 {"§", "\302\247"},
56 {"¨", "\302\250"},
57 {"©", "\302\251"},
58 {"ª", "\302\252"},
59 {"«", "\302\253"},
60 {"¬", "\302\254"},
61 {"­", "\302\255"},
62 {"®", "\302\256"},
63 {"¯", "\302\257"},
64 {"°", "\302\260"},
65 {"±", "\302\261"},
66 {"²", "\302\262"},
67 {"³", "\302\263"},
68 {"´", "\302\264"},
69 {"µ", "\302\265"},
70 {"¶", "\302\266"},
71 {"·", "\302\267"},
72 {"¸", "\302\270"},
73 {"¹", "\302\271"},
74 {"º", "\302\272"},
75 {"»", "\302\273"},
76 {"¼", "\302\274"},
77 {"½", "\302\275"},
78 {"¾", "\302\276"},
79 {"¿", "\302\277"},
80 {"À", "\303\200"},
81 {"Á", "\303\201"},
82 {"Â", "\303\202"},
83 {"Ã", "\303\203"},
84 {"Ä", "\303\204"},
85 {"Å", "\303\205"},
86 {"Æ", "\303\206"},
87 {"Ç", "\303\207"},
88 {"È", "\303\210"},
89 {"É", "\303\211"},
90 {"Ê", "\303\212"},
91 {"Ë", "\303\213"},
92 {"Ì", "\303\214"},
93 {"Í", "\303\215"},
94 {"Î", "\303\216"},
95 {"Ï", "\303\217"},
96 {"Ð", "\303\220"},
97 {"Ñ", "\303\221"},
98 {"Ò", "\303\222"},
99 {"Ó", "\303\223"},
100 {"Ô", "\303\224"},
101 {"Õ", "\303\225"},
102 {"Ö", "\303\226"},
103 {"×", "\303\227"},
104 {"Ø", "\303\230"},
105 {"Ù", "\303\231"},
106 {"Ú", "\303\232"},
107 {"Û", "\303\233"},
108 {"Ü", "\303\234"},
109 {"Ý", "\303\235"},
110 {"Þ", "\303\236"},
111 {"ß", "\303\237"},
112 {"à", "\303\240"},
113 {"á", "\303\241"},
114 {"â", "\303\242"},
115 {"ã", "\303\243"},
116 {"ä", "\303\244"},
117 {"å", "\303\245"},
118 {"æ", "\303\246"},
119 {"ç", "\303\247"},
120 {"è", "\303\250"},
121 {"é", "\303\251"},
122 {"ê", "\303\252"},
123 {"ë", "\303\253"},
124 {"ì", "\303\254"},
125 {"í", "\303\255"},
126 {"î", "\303\256"},
127 {"ï", "\303\257"},
128 {"ð", "\303\260"},
129 {"ñ", "\303\261"},
130 {"ò", "\303\262"},
131 {"ó", "\303\263"},
132 {"ô", "\303\264"},
133 {"õ", "\303\265"},
134 {"ö", "\303\266"},
135 {"÷", "\303\267"},
136 {"ø", "\303\270"},
137 {"ù", "\303\271"},
138 {"ú", "\303\272"},
139 {"û", "\303\273"},
140 {"ü", "\303\274"},
141 {"ý", "\303\275"},
142 {"þ", "\303\276"},
143 {"ÿ", "\303\277"},
144 {"Œ", "\305\222"},
145 {"œ", "\305\223"},
146 {"Š", "\305\240"},
147 {"š", "\305\241"},
148 {"Ÿ", "\305\270"},
149 {"ˆ", "\313\206"},
150 {"˜", "\313\234"},
151 {" ", "\342\200\202"},
152 {" ", "\342\200\203"},
153 {" ", "\342\200\211"},
154 {"–", "\342\200\223"},
155 {"—", "\342\200\224"},
156 {"‘", "\342\200\230"},
157 {"’", "\342\200\231"},
158 {"‚", "\342\200\232"},
159 {"“", "\342\200\234"},
160 {"”", "\342\200\235"},
161 {"„", "\342\200\236"},
162 {"†", "\342\200\240"},
163 {"‡", "\342\200\241"},
164 {"•", "\342\200\242"},
165 {"…", "\342\200\246"},
166 {"‰", "\342\200\260"},
167 {"‹", "\342\200\271"},
168 {"›", "\342\200\272"},
169 {"€", "\342\202\254"},
170 {"™", "\342\204\242"},
178 {"¡", "\302\241"},
179 {"¢", "\302\242"},
180 {"£", "\302\243"},
181 {"¤", "\302\244"},
182 {"¥", "\302\245"},
183 {"¦", "\302\246"},
184 {"§", "\302\247"},
185 {"¨", "\302\250"},
186 {"©", "\302\251"},
187 {"ª", "\302\252"},
188 {"«", "\302\253"},
189 {"¬", "\302\254"},
190 {"­", "\302\255"},
191 {"®", "\302\256"},
192 {"¯", "\302\257"},
193 {"°", "\302\260"},
194 {"±", "\302\261"},
195 {"²", "\302\262"},
196 {"³", "\302\263"},
197 {"´", "\302\264"},
198 {"µ", "\302\265"},
199 {"¶", "\302\266"},
200 {"·", "\302\267"},
201 {"¸", "\302\270"},
202 {"¹", "\302\271"},
203 {"º", "\302\272"},
204 {"»", "\302\273"},
205 {"¼", "\302\274"},
206 {"½", "\302\275"},
207 {"¾", "\302\276"},
208 {"¿", "\302\277"},
209 {"À", "\303\200"},
210 {"Á", "\303\201"},
211 {"Â", "\303\202"},
212 {"Ã", "\303\203"},
213 {"Ä", "\303\204"},
214 {"Å", "\303\205"},
215 {"Æ", "\303\206"},
216 {"Ç", "\303\207"},
217 {"È", "\303\210"},
218 {"É", "\303\211"},
219 {"Ê", "\303\212"},
220 {"Ë", "\303\213"},
221 {"Ì", "\303\214"},
222 {"Í", "\303\215"},
223 {"Î", "\303\216"},
224 {"Ï", "\303\217"},
225 {"Ð", "\303\220"},
226 {"Ñ", "\303\221"},
227 {"Ò", "\303\222"},
228 {"Ó", "\303\223"},
229 {"Ô", "\303\224"},
230 {"Õ", "\303\225"},
231 {"Ö", "\303\226"},
232 {"×", "\303\227"},
233 {"Ø", "\303\230"},
234 {"Ù", "\303\231"},
235 {"Ú", "\303\232"},
236 {"Û", "\303\233"},
237 {"Ü", "\303\234"},
238 {"Ý", "\303\235"},
239 {"Þ", "\303\236"},
240 {"ß", "\303\237"},
241 {"à", "\303\240"},
242 {"á", "\303\241"},
243 {"â", "\303\242"},
244 {"ã", "\303\243"},
245 {"ä", "\303\244"},
246 {"å", "\303\245"},
247 {"æ", "\303\246"},
248 {"ç", "\303\247"},
249 {"è", "\303\250"},
250 {"é", "\303\251"},
251 {"ê", "\303\252"},
252 {"ë", "\303\253"},
253 {"ì", "\303\254"},
254 {"í", "\303\255"},
255 {"î", "\303\256"},
256 {"ï", "\303\257"},
257 {"ð", "\303\260"},
258 {"ñ", "\303\261"},
259 {"ò", "\303\262"},
260 {"ó", "\303\263"},
261 {"ô", "\303\264"},
262 {"õ", "\303\265"},
263 {"ö", "\303\266"},
264 {"÷", "\303\267"},
265 {"ø", "\303\270"},
266 {"ù", "\303\271"},
267 {"ú", "\303\272"},
268 {"û", "\303\273"},
269 {"ü", "\303\274"},
270 {"ý", "\303\275"},
271 {"þ", "\303\276"},
272 {"ÿ", "\303\277"},
273 {"Œ", "\305\222"},
274 {"œ", "\305\223"},
275 {"Š", "\305\240"},
276 {"š", "\305\241"},
277 {"Ÿ", "\305\270"},
278 {"ˆ", "\313\206"},
279 {"˜", "\313\234"},
280 {" ", "\342\200\202"},
281 {" ", "\342\200\203"},
282 {" ", "\342\200\211"},
283 {"–", "\342\200\223"},
284 {"—", "\342\200\224"},
285 {"‘", "\342\200\230"},
286 {"’", "\342\200\231"},
287 {"‚", "\342\200\232"},
288 {"“", "\342\200\234"},
289 {"”", "\342\200\235"},
290 {"„", "\342\200\236"},
291 {"†", "\342\200\240"},
292 {"‡", "\342\200\241"},
293 {"•", "\342\200\242"},
294 {"…", "\342\200\246"},
295 {"‰", "\342\200\260"},
296 {"‹", "\342\200\271"},
297 {"›", "\342\200\272"},
298 {"€", "\342\202\254"},
299 {"™", "\342\204\242"}
302 typedef struct _SC_HTMLAltSymbol SC_HTMLAltSymbol;
304 struct _SC_HTMLAltSymbol
310 static GHashTable *default_symbol_table;
312 static SC_HTMLState sc_html_read_line (SC_HTMLParser *parser);
313 static void sc_html_append_char (SC_HTMLParser *parser,
315 static void sc_html_append_str (SC_HTMLParser *parser,
318 static SC_HTMLState sc_html_parse_tag (SC_HTMLParser *parser);
319 static void sc_html_parse_special (SC_HTMLParser *parser);
320 static void sc_html_get_parenthesis (SC_HTMLParser *parser,
325 SC_HTMLParser *sc_html_parser_new(FILE *fp, CodeConverter *conv)
327 SC_HTMLParser *parser;
329 g_return_val_if_fail(fp != NULL, NULL);
330 g_return_val_if_fail(conv != NULL, NULL);
332 parser = g_new0(SC_HTMLParser, 1);
335 parser->str = g_string_new(NULL);
336 parser->buf = g_string_new(NULL);
337 parser->bufp = parser->buf->str;
338 parser->state = SC_HTML_NORMAL;
340 parser->newline = TRUE;
341 parser->empty_line = TRUE;
342 parser->space = FALSE;
345 #define SYMBOL_TABLE_ADD(table, list) \
349 for (i = 0; i < sizeof(list) / sizeof(list[0]); i++) \
350 g_hash_table_insert(table, list[i].key, list[i].val); \
352 #define SYMBOL_TABLE_REF_ADD(table, list) \
356 for (i = 0; i < sizeof(list) / sizeof(list[0]); i++) \
357 g_hash_table_insert(table, &list[i].key, list[i].val); \
360 if (!default_symbol_table) {
361 default_symbol_table =
362 g_hash_table_new(g_str_hash, g_str_equal);
363 SYMBOL_TABLE_ADD(default_symbol_table, symbol_list);
366 #undef SYMBOL_TABLE_ADD
367 #undef SYMBOL_TABLE_REF_ADD
369 parser->symbol_table = default_symbol_table;
374 void sc_html_parser_destroy(SC_HTMLParser *parser)
376 g_string_free(parser->str, TRUE);
377 g_string_free(parser->buf, TRUE);
378 g_free(parser->href);
382 gchar *sc_html_parse(SC_HTMLParser *parser)
384 parser->state = SC_HTML_NORMAL;
385 g_string_truncate(parser->str, 0);
387 if (*parser->bufp == '\0') {
388 g_string_truncate(parser->buf, 0);
389 parser->bufp = parser->buf->str;
390 if (sc_html_read_line(parser) == SC_HTML_EOF)
394 while (*parser->bufp != '\0') {
395 switch (*parser->bufp) {
398 st = sc_html_parse_tag(parser);
399 /* when we see an href, we need to flush the str
400 * buffer. Then collect all the chars until we
401 * see the end anchor tag
403 if (SC_HTML_HREF_BEG == st || SC_HTML_HREF == st)
404 return parser->str->str;
408 sc_html_parse_special(parser);
414 if (parser->bufp[0] == '\r' && parser->bufp[1] == '\n')
418 if (!parser->newline)
419 parser->space = TRUE;
426 sc_html_append_char(parser, *parser->bufp++);
430 return parser->str->str;
433 static SC_HTMLState sc_html_read_line(SC_HTMLParser *parser)
435 gchar buf[SC_HTMLBUFSIZE];
436 gchar buf2[SC_HTMLBUFSIZE];
439 if (fgets(buf, sizeof(buf), parser->fp) == NULL) {
440 parser->state = SC_HTML_EOF;
444 if (conv_convert(parser->conv, buf2, sizeof(buf2), buf) < 0) {
445 index = parser->bufp - parser->buf->str;
447 conv_utf8todisp(buf2, sizeof(buf2), buf);
448 g_string_append(parser->buf, buf2);
450 parser->bufp = parser->buf->str + index;
452 return SC_HTML_CONV_FAILED;
455 index = parser->bufp - parser->buf->str;
457 g_string_append(parser->buf, buf2);
459 parser->bufp = parser->buf->str + index;
461 return SC_HTML_NORMAL;
464 static void sc_html_append_char(SC_HTMLParser *parser, gchar ch)
466 GString *str = parser->str;
468 if (!parser->pre && parser->space) {
469 g_string_append_c(str, ' ');
470 parser->space = FALSE;
473 g_string_append_c(str, ch);
475 parser->empty_line = FALSE;
477 parser->newline = TRUE;
478 if (str->len > 1 && str->str[str->len - 2] == '\n')
479 parser->empty_line = TRUE;
481 parser->newline = FALSE;
484 static void sc_html_append_str(SC_HTMLParser *parser, const gchar *str, gint len)
486 GString *string = parser->str;
488 if (!parser->pre && parser->space) {
489 g_string_append_c(string, ' ');
490 parser->space = FALSE;
493 if (len == 0) return;
495 g_string_append(string, str);
498 Xstrndup_a(s, str, len, return);
499 g_string_append(string, s);
502 parser->empty_line = FALSE;
503 if (string->len > 0 && string->str[string->len - 1] == '\n') {
504 parser->newline = TRUE;
505 if (string->len > 1 && string->str[string->len - 2] == '\n')
506 parser->empty_line = TRUE;
508 parser->newline = FALSE;
511 static SC_HTMLTag *sc_html_get_tag(const gchar *str)
517 g_return_val_if_fail(str != NULL, NULL);
519 if (*str == '\0' || *str == '!') return NULL;
521 Xstrdup_a(tmp, str, return NULL);
523 tag = g_new0(SC_HTMLTag, 1);
525 for (tmpp = tmp; *tmpp != '\0' && !g_ascii_isspace(*tmpp); tmpp++)
530 tag->name = g_strdup(tmp);
535 tag->name = g_strdup(tmp);
538 while (*tmpp != '\0') {
545 while (g_ascii_isspace(*tmpp)) tmpp++;
548 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp) &&
551 if (*tmpp != '\0' && *tmpp != '=') {
553 while (g_ascii_isspace(*tmpp)) tmpp++;
558 while (g_ascii_isspace(*tmpp)) tmpp++;
560 if (*tmpp == '"' || *tmpp == '\'') {
565 if ((p = strchr(attr_value, quote)) == NULL) {
566 g_warning("sc_html_get_tag(): syntax error in tag: '%s'\n", str);
571 while (g_ascii_isspace(*tmpp)) tmpp++;
575 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp)) tmpp++;
582 g_strchomp(attr_name);
583 g_strdown(attr_name);
584 attr = g_new(SC_HTMLAttr, 1);
585 attr->name = g_strdup(attr_name);
586 attr->value = g_strdup(attr_value);
587 tag->attr = g_list_append(tag->attr, attr);
593 static void sc_html_free_tag(SC_HTMLTag *tag)
598 while (tag->attr != NULL) {
599 SC_HTMLAttr *attr = (SC_HTMLAttr *)tag->attr->data;
603 tag->attr = g_list_remove(tag->attr, tag->attr->data);
608 static SC_HTMLState sc_html_parse_tag(SC_HTMLParser *parser)
610 gchar buf[SC_HTMLBUFSIZE];
613 sc_html_get_parenthesis(parser, buf, sizeof(buf));
615 tag = sc_html_get_tag(buf);
617 parser->state = SC_HTML_UNKNOWN;
618 if (!tag) return SC_HTML_UNKNOWN;
620 if (!strcmp(tag->name, "br")) {
621 parser->space = FALSE;
622 sc_html_append_char(parser, '\n');
623 parser->state = SC_HTML_BR;
624 } else if (!strcmp(tag->name, "a")) {
626 for (cur = tag->attr; cur != NULL; cur = cur->next) {
627 if (cur->data && !strcmp(((SC_HTMLAttr *)cur->data)->name, "href")) {
628 g_free(parser->href);
629 parser->href = g_strdup(((SC_HTMLAttr *)cur->data)->value);
630 parser->state = SC_HTML_HREF_BEG;
634 } else if (!strcmp(tag->name, "/a")) {
635 parser->state = SC_HTML_HREF;
636 } else if (!strcmp(tag->name, "p")) {
637 parser->space = FALSE;
638 if (!parser->empty_line) {
639 parser->space = FALSE;
640 if (!parser->newline) sc_html_append_char(parser, '\n');
641 sc_html_append_char(parser, '\n');
643 parser->state = SC_HTML_PAR;
644 } else if (!strcmp(tag->name, "pre")) {
646 parser->state = SC_HTML_PRE;
647 } else if (!strcmp(tag->name, "/pre")) {
649 parser->state = SC_HTML_NORMAL;
650 } else if (!strcmp(tag->name, "hr")) {
651 if (!parser->newline) {
652 parser->space = FALSE;
653 sc_html_append_char(parser, '\n');
655 sc_html_append_str(parser, HR_STR "\n", -1);
656 parser->state = SC_HTML_HR;
657 } else if (!strcmp(tag->name, "div") ||
658 !strcmp(tag->name, "ul") ||
659 !strcmp(tag->name, "li") ||
660 !strcmp(tag->name, "table") ||
661 !strcmp(tag->name, "tr") ||
662 (tag->name[0] == 'h' && g_ascii_isdigit(tag->name[1]))) {
663 if (!parser->newline) {
664 parser->space = FALSE;
665 sc_html_append_char(parser, '\n');
667 parser->state = SC_HTML_NORMAL;
668 } else if (!strcmp(tag->name, "/table") ||
669 (tag->name[0] == '/' &&
670 tag->name[1] == 'h' &&
671 g_ascii_isdigit(tag->name[1]))) {
672 if (!parser->empty_line) {
673 parser->space = FALSE;
674 if (!parser->newline) sc_html_append_char(parser, '\n');
675 sc_html_append_char(parser, '\n');
677 parser->state = SC_HTML_NORMAL;
678 } else if (!strcmp(tag->name, "/div") ||
679 !strcmp(tag->name, "/ul") ||
680 !strcmp(tag->name, "/li")) {
681 if (!parser->newline) {
682 parser->space = FALSE;
683 sc_html_append_char(parser, '\n');
685 parser->state = SC_HTML_NORMAL;
688 sc_html_free_tag(tag);
690 return parser->state;
693 static void sc_html_parse_special(SC_HTMLParser *parser)
695 gchar symbol_name[9];
699 parser->state = SC_HTML_UNKNOWN;
700 g_return_if_fail(*parser->bufp == '&');
703 for (n = 0; parser->bufp[n] != '\0' && parser->bufp[n] != ';'; n++)
705 if (n > 7 || parser->bufp[n] != ';') {
706 /* output literal `&' */
707 sc_html_append_char(parser, *parser->bufp++);
708 parser->state = SC_HTML_NORMAL;
711 strncpy2(symbol_name, parser->bufp, n + 2);
712 parser->bufp += n + 1;
714 if ((val = g_hash_table_lookup(parser->symbol_table, symbol_name))
716 sc_html_append_str(parser, val, -1);
717 parser->state = SC_HTML_NORMAL;
721 sc_html_append_str(parser, symbol_name, -1);
724 static void sc_html_get_parenthesis(SC_HTMLParser *parser, gchar *buf, gint len)
729 g_return_if_fail(*parser->bufp == '<');
731 /* ignore comment / CSS / script stuff */
732 if (!strncmp(parser->bufp, "<!--", 4)) {
734 while ((p = strstr(parser->bufp, "-->")) == NULL)
735 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
736 parser->bufp = p + 3;
739 if (!g_ascii_strncasecmp(parser->bufp, "<style", 6)) {
741 while ((p = strcasestr(parser->bufp, "</style>")) == NULL)
742 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
743 parser->bufp = p + 8;
746 if (!g_ascii_strncasecmp(parser->bufp, "<script", 7)) {
748 while ((p = strcasestr(parser->bufp, "</script>")) == NULL)
749 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
750 parser->bufp = p + 9;
755 while ((p = strchr(parser->bufp, '>')) == NULL)
756 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
758 strncpy2(buf, parser->bufp, MIN(p - parser->bufp + 1, len));
760 parser->bufp = p + 1;