2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2012 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 "------------------------------------------------"
33 typedef struct _SC_HTMLSymbol SC_HTMLSymbol;
41 static SC_HTMLSymbol symbol_list[] = {
53 {"™", "\342\204\242"},
55 {"¡", "\302\241"},
56 {"¢", "\302\242"},
57 {"£", "\302\243"},
58 {"¤", "\302\244"},
59 {"¥", "\302\245"},
60 {"¦", "\302\246"},
61 {"§", "\302\247"},
62 {"¨", "\302\250"},
63 {"©", "\302\251"},
64 {"ª", "\302\252"},
65 {"«", "\302\253"},
66 {"¬", "\302\254"},
67 {"­", "\302\255"},
68 {"®", "\302\256"},
69 {"¯", "\302\257"},
70 {"°", "\302\260"},
71 {"±", "\302\261"},
72 {"²", "\302\262"},
73 {"³", "\302\263"},
74 {"´", "\302\264"},
75 {"µ", "\302\265"},
76 {"¶", "\302\266"},
77 {"·", "\302\267"},
78 {"¸", "\302\270"},
79 {"¹", "\302\271"},
80 {"º", "\302\272"},
81 {"»", "\302\273"},
82 {"¼", "\302\274"},
83 {"½", "\302\275"},
84 {"¾", "\302\276"},
85 {"¿", "\302\277"},
86 {"À", "\303\200"},
87 {"Á", "\303\201"},
88 {"Â", "\303\202"},
89 {"Ã", "\303\203"},
90 {"Ä", "\303\204"},
91 {"Å", "\303\205"},
92 {"Æ", "\303\206"},
93 {"Ç", "\303\207"},
94 {"È", "\303\210"},
95 {"É", "\303\211"},
96 {"Ê", "\303\212"},
97 {"Ë", "\303\213"},
98 {"Ì", "\303\214"},
99 {"Í", "\303\215"},
100 {"Î", "\303\216"},
101 {"Ï", "\303\217"},
102 {"Ð", "\303\220"},
103 {"Ñ", "\303\221"},
104 {"Ò", "\303\222"},
105 {"Ó", "\303\223"},
106 {"Ô", "\303\224"},
107 {"Õ", "\303\225"},
108 {"Ö", "\303\226"},
109 {"×", "\303\227"},
110 {"Ø", "\303\230"},
111 {"Ù", "\303\231"},
112 {"Ú", "\303\232"},
113 {"Û", "\303\233"},
114 {"Ü", "\303\234"},
115 {"Ý", "\303\235"},
116 {"Þ", "\303\236"},
117 {"ß", "\303\237"},
118 {"à", "\303\240"},
119 {"á", "\303\241"},
120 {"â", "\303\242"},
121 {"ã", "\303\243"},
122 {"ä", "\303\244"},
123 {"å", "\303\245"},
124 {"æ", "\303\246"},
125 {"ç", "\303\247"},
126 {"è", "\303\250"},
127 {"é", "\303\251"},
128 {"ê", "\303\252"},
129 {"ë", "\303\253"},
130 {"ì", "\303\254"},
131 {"í", "\303\255"},
132 {"î", "\303\256"},
133 {"ï", "\303\257"},
134 {"ð", "\303\260"},
135 {"ñ", "\303\261"},
136 {"ò", "\303\262"},
137 {"ó", "\303\263"},
138 {"ô", "\303\264"},
139 {"õ", "\303\265"},
140 {"ö", "\303\266"},
141 {"÷", "\303\267"},
142 {"ø", "\303\270"},
143 {"ù", "\303\271"},
144 {"ú", "\303\272"},
145 {"û", "\303\273"},
146 {"ü", "\303\274"},
147 {"ý", "\303\275"},
148 {"þ", "\303\276"},
149 {"ÿ", "\303\277"},
150 {"Œ", "\305\222"},
151 {"œ", "\305\223"},
152 {"Š", "\305\240"},
153 {"š", "\305\241"},
154 {"Ÿ", "\305\270"},
155 {"ˆ", "\313\206"},
156 {"˜", "\313\234"},
157 {" ", "\342\200\202"},
158 {" ", "\342\200\203"},
159 {" ", "\342\200\211"},
160 {"–", "\342\200\223"},
161 {"—", "\342\200\224"},
162 {"‘", "\342\200\230"},
163 {"’", "\342\200\231"},
164 {"‚", "\342\200\232"},
165 {"“", "\342\200\234"},
166 {"”", "\342\200\235"},
167 {"„", "\342\200\236"},
168 {"†", "\342\200\240"},
169 {"‡", "\342\200\241"},
170 {"•", "\342\200\242"},
171 {"…", "\342\200\246"},
172 {"‰", "\342\200\260"},
173 {"‹", "\342\200\271"},
174 {"›", "\342\200\272"},
175 {"€", "\342\202\254"},
176 {"™", "\342\204\242"},
184 {"¡", "\302\241"},
185 {"¢", "\302\242"},
186 {"£", "\302\243"},
187 {"¤", "\302\244"},
188 {"¥", "\302\245"},
189 {"¦", "\302\246"},
190 {"§", "\302\247"},
191 {"¨", "\302\250"},
192 {"©", "\302\251"},
193 {"ª", "\302\252"},
194 {"«", "\302\253"},
195 {"¬", "\302\254"},
196 {"­", "\302\255"},
197 {"®", "\302\256"},
198 {"¯", "\302\257"},
199 {"°", "\302\260"},
200 {"±", "\302\261"},
201 {"²", "\302\262"},
202 {"³", "\302\263"},
203 {"´", "\302\264"},
204 {"µ", "\302\265"},
205 {"¶", "\302\266"},
206 {"·", "\302\267"},
207 {"¸", "\302\270"},
208 {"¹", "\302\271"},
209 {"º", "\302\272"},
210 {"»", "\302\273"},
211 {"¼", "\302\274"},
212 {"½", "\302\275"},
213 {"¾", "\302\276"},
214 {"¿", "\302\277"},
215 {"À", "\303\200"},
216 {"Á", "\303\201"},
217 {"Â", "\303\202"},
218 {"Ã", "\303\203"},
219 {"Ä", "\303\204"},
220 {"Å", "\303\205"},
221 {"Æ", "\303\206"},
222 {"Ç", "\303\207"},
223 {"È", "\303\210"},
224 {"É", "\303\211"},
225 {"Ê", "\303\212"},
226 {"Ë", "\303\213"},
227 {"Ì", "\303\214"},
228 {"Í", "\303\215"},
229 {"Î", "\303\216"},
230 {"Ï", "\303\217"},
231 {"Ð", "\303\220"},
232 {"Ñ", "\303\221"},
233 {"Ò", "\303\222"},
234 {"Ó", "\303\223"},
235 {"Ô", "\303\224"},
236 {"Õ", "\303\225"},
237 {"Ö", "\303\226"},
238 {"×", "\303\227"},
239 {"Ø", "\303\230"},
240 {"Ù", "\303\231"},
241 {"Ú", "\303\232"},
242 {"Û", "\303\233"},
243 {"Ü", "\303\234"},
244 {"Ý", "\303\235"},
245 {"Þ", "\303\236"},
246 {"ß", "\303\237"},
247 {"à", "\303\240"},
248 {"á", "\303\241"},
249 {"â", "\303\242"},
250 {"ã", "\303\243"},
251 {"ä", "\303\244"},
252 {"å", "\303\245"},
253 {"æ", "\303\246"},
254 {"ç", "\303\247"},
255 {"è", "\303\250"},
256 {"é", "\303\251"},
257 {"ê", "\303\252"},
258 {"ë", "\303\253"},
259 {"ì", "\303\254"},
260 {"í", "\303\255"},
261 {"î", "\303\256"},
262 {"ï", "\303\257"},
263 {"ð", "\303\260"},
264 {"ñ", "\303\261"},
265 {"ò", "\303\262"},
266 {"ó", "\303\263"},
267 {"ô", "\303\264"},
268 {"õ", "\303\265"},
269 {"ö", "\303\266"},
270 {"÷", "\303\267"},
271 {"ø", "\303\270"},
272 {"ù", "\303\271"},
273 {"ú", "\303\272"},
274 {"û", "\303\273"},
275 {"ü", "\303\274"},
276 {"ý", "\303\275"},
277 {"þ", "\303\276"},
278 {"ÿ", "\303\277"},
279 {"Œ", "\305\222"},
280 {"œ", "\305\223"},
281 {"Š", "\305\240"},
282 {"š", "\305\241"},
283 {"Ÿ", "\305\270"},
284 {"ˆ", "\313\206"},
285 {"˜", "\313\234"},
286 {" ", "\342\200\202"},
287 {" ", "\342\200\203"},
288 {" ", "\342\200\211"},
289 {"–", "\342\200\223"},
290 {"—", "\342\200\224"},
291 {"‘", "\342\200\230"},
292 {"’", "\342\200\231"},
293 {"‚", "\342\200\232"},
294 {"“", "\342\200\234"},
295 {"”", "\342\200\235"},
296 {"„", "\342\200\236"},
297 {"†", "\342\200\240"},
298 {"‡", "\342\200\241"},
299 {"•", "\342\200\242"},
300 {"…", "\342\200\246"},
301 {"‰", "\342\200\260"},
302 {"‹", "\342\200\271"},
303 {"›", "\342\200\272"},
304 {"€", "\342\202\254"},
305 {"™", "\342\204\242"}
308 typedef struct _SC_HTMLAltSymbol SC_HTMLAltSymbol;
310 struct _SC_HTMLAltSymbol
316 static GHashTable *default_symbol_table;
318 static SC_HTMLState sc_html_read_line (SC_HTMLParser *parser);
319 static void sc_html_append_char (SC_HTMLParser *parser,
321 static void sc_html_append_str (SC_HTMLParser *parser,
324 static SC_HTMLState sc_html_parse_tag (SC_HTMLParser *parser);
325 static void sc_html_parse_special (SC_HTMLParser *parser);
326 static void sc_html_get_parenthesis (SC_HTMLParser *parser,
331 SC_HTMLParser *sc_html_parser_new(FILE *fp, CodeConverter *conv)
333 SC_HTMLParser *parser;
335 cm_return_val_if_fail(fp != NULL, NULL);
336 cm_return_val_if_fail(conv != NULL, NULL);
338 parser = g_new0(SC_HTMLParser, 1);
341 parser->str = g_string_new(NULL);
342 parser->buf = g_string_new(NULL);
343 parser->bufp = parser->buf->str;
344 parser->state = SC_HTML_NORMAL;
346 parser->newline = TRUE;
347 parser->empty_line = TRUE;
348 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;
493 parser->newline = FALSE;
496 static void sc_html_append_str(SC_HTMLParser *parser, const gchar *str, gint len)
498 GString *string = parser->str;
500 if (!parser->pre && parser->space) {
501 g_string_append_c(string, ' ');
502 parser->space = FALSE;
505 if (len == 0) return;
507 g_string_append(string, str);
510 Xstrndup_a(s, str, len, return);
511 g_string_append(string, s);
514 parser->empty_line = FALSE;
515 if (string->len > 0 && string->str[string->len - 1] == '\n') {
516 parser->newline = TRUE;
517 if (string->len > 1 && string->str[string->len - 2] == '\n')
518 parser->empty_line = TRUE;
520 parser->newline = FALSE;
523 static SC_HTMLTag *sc_html_get_tag(const gchar *str)
529 cm_return_val_if_fail(str != NULL, NULL);
531 if (*str == '\0' || *str == '!') return NULL;
533 Xstrdup_a(tmp, str, return NULL);
535 tag = g_new0(SC_HTMLTag, 1);
537 for (tmpp = tmp; *tmpp != '\0' && !g_ascii_isspace(*tmpp); tmpp++)
541 tag->name = g_utf8_strdown(tmp, -1);
545 tag->name = g_utf8_strdown(tmp, -1);
548 while (*tmpp != '\0') {
555 while (g_ascii_isspace(*tmpp)) tmpp++;
558 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp) &&
561 if (*tmpp != '\0' && *tmpp != '=') {
563 while (g_ascii_isspace(*tmpp)) tmpp++;
568 while (g_ascii_isspace(*tmpp)) tmpp++;
570 if (*tmpp == '"' || *tmpp == '\'') {
575 if ((p = strchr(attr_value, quote)) == NULL) {
576 g_warning("sc_html_get_tag(): syntax error in tag: '%s'", str);
581 while (g_ascii_isspace(*tmpp)) tmpp++;
585 while (*tmpp != '\0' && !g_ascii_isspace(*tmpp)) tmpp++;
592 g_strchomp(attr_name);
593 attr = g_new(SC_HTMLAttr, 1);
594 attr->name = g_utf8_strdown(attr_name, -1);
595 attr->value = g_strdup(attr_value);
596 tag->attr = g_list_append(tag->attr, attr);
602 static void sc_html_free_tag(SC_HTMLTag *tag)
607 while (tag->attr != NULL) {
608 SC_HTMLAttr *attr = (SC_HTMLAttr *)tag->attr->data;
612 tag->attr = g_list_remove(tag->attr, tag->attr->data);
617 static void decode_href(SC_HTMLParser *parser)
620 SC_HTMLParser *tparser = g_new0(SC_HTMLParser, 1);
622 tparser->str = g_string_new(NULL);
623 tparser->buf = g_string_new(parser->href);
624 tparser->bufp = tparser->buf->str;
625 tparser->symbol_table = default_symbol_table;
627 tmp = sc_html_parse(tparser);
629 g_free(parser->href);
630 parser->href = g_strdup(tmp);
632 sc_html_parser_destroy(tparser);
635 static SC_HTMLState sc_html_parse_tag(SC_HTMLParser *parser)
637 gchar buf[SC_HTMLBUFSIZE];
640 sc_html_get_parenthesis(parser, buf, sizeof(buf));
642 tag = sc_html_get_tag(buf);
644 parser->state = SC_HTML_UNKNOWN;
645 if (!tag) return SC_HTML_UNKNOWN;
647 if (!strcmp(tag->name, "br") || !strcmp(tag->name, "br/")) {
648 parser->space = FALSE;
649 sc_html_append_char(parser, '\n');
650 parser->state = SC_HTML_BR;
651 } else if (!strcmp(tag->name, "a")) {
654 for (cur = tag->attr; cur != NULL; cur = cur->next) {
655 if (cur->data && !strcmp(((SC_HTMLAttr *)cur->data)->name, "href")) {
656 g_free(parser->href);
657 parser->href = g_strdup(((SC_HTMLAttr *)cur->data)->value);
659 parser->state = SC_HTML_HREF_BEG;
663 if (parser->href == NULL)
664 parser->href = g_strdup("");
665 parser->state = SC_HTML_HREF_BEG;
666 } else if (!strcmp(tag->name, "/a")) {
667 parser->state = SC_HTML_HREF;
668 } else if (!strcmp(tag->name, "p")) {
669 parser->space = FALSE;
670 if (!parser->empty_line) {
671 parser->space = FALSE;
672 if (!parser->newline) sc_html_append_char(parser, '\n');
673 sc_html_append_char(parser, '\n');
675 parser->state = SC_HTML_PAR;
676 } else if (!strcmp(tag->name, "pre")) {
678 parser->state = SC_HTML_PRE;
679 } else if (!strcmp(tag->name, "/pre")) {
681 parser->state = SC_HTML_NORMAL;
682 } else if (!strcmp(tag->name, "hr")) {
683 if (!parser->newline) {
684 parser->space = FALSE;
685 sc_html_append_char(parser, '\n');
687 sc_html_append_str(parser, HR_STR "\n", -1);
688 parser->state = SC_HTML_HR;
689 } else if (!strcmp(tag->name, "div") ||
690 !strcmp(tag->name, "ul") ||
691 !strcmp(tag->name, "li") ||
692 !strcmp(tag->name, "table") ||
693 !strcmp(tag->name, "tr") ||
694 (tag->name[0] == 'h' && g_ascii_isdigit(tag->name[1]))) {
695 if (!parser->newline) {
696 parser->space = FALSE;
697 sc_html_append_char(parser, '\n');
699 if (!strcmp(tag->name, "li")) {
700 sc_html_append_str(parser, LI_STR, -1);
702 parser->state = SC_HTML_NORMAL;
703 } else if (!strcmp(tag->name, "/table") ||
704 (tag->name[0] == '/' &&
705 tag->name[1] == 'h' &&
706 g_ascii_isdigit(tag->name[1]))) {
707 if (!parser->empty_line) {
708 parser->space = FALSE;
709 if (!parser->newline) sc_html_append_char(parser, '\n');
710 sc_html_append_char(parser, '\n');
712 parser->state = SC_HTML_NORMAL;
713 } else if (!strcmp(tag->name, "/div") ||
714 !strcmp(tag->name, "/ul") ||
715 !strcmp(tag->name, "/li")) {
716 if (!parser->newline) {
717 parser->space = FALSE;
718 sc_html_append_char(parser, '\n');
720 parser->state = SC_HTML_NORMAL;
723 sc_html_free_tag(tag);
725 return parser->state;
728 static void sc_html_parse_special(SC_HTMLParser *parser)
730 gchar symbol_name[9];
734 parser->state = SC_HTML_UNKNOWN;
735 cm_return_if_fail(*parser->bufp == '&');
738 for (n = 0; parser->bufp[n] != '\0' && parser->bufp[n] != ';'; n++)
740 if (n > 7 || parser->bufp[n] != ';') {
741 /* output literal `&' */
742 sc_html_append_char(parser, *parser->bufp++);
743 parser->state = SC_HTML_NORMAL;
746 strncpy2(symbol_name, parser->bufp, n + 2);
747 parser->bufp += n + 1;
749 if ((val = g_hash_table_lookup(parser->symbol_table, symbol_name))
751 sc_html_append_str(parser, val, -1);
752 parser->state = SC_HTML_NORMAL;
756 sc_html_append_str(parser, symbol_name, -1);
759 static gchar *sc_html_find_tag(SC_HTMLParser *parser, const gchar *tag)
761 gchar *cur = parser->bufp;
762 gint len = strlen(tag);
767 while ((cur = strstr(cur, "<")) != NULL) {
768 if (!g_ascii_strncasecmp(cur, tag, len))
775 static void sc_html_get_parenthesis(SC_HTMLParser *parser, gchar *buf, gint len)
780 cm_return_if_fail(*parser->bufp == '<');
782 /* ignore comment / CSS / script stuff */
783 if (!strncmp(parser->bufp, "<!--", 4)) {
785 while ((p = strstr(parser->bufp, "-->")) == NULL)
786 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
787 parser->bufp = p + 3;
790 if (!g_ascii_strncasecmp(parser->bufp, "<style", 6)) {
792 while ((p = sc_html_find_tag(parser, "</style>")) == NULL)
793 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
794 parser->bufp = p + 8;
797 if (!g_ascii_strncasecmp(parser->bufp, "<script", 7)) {
799 while ((p = sc_html_find_tag(parser, "</script>")) == NULL)
800 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
801 parser->bufp = p + 9;
806 while ((p = strchr(parser->bufp, '>')) == NULL)
807 if (sc_html_read_line(parser) == SC_HTML_EOF) return;
809 strncpy2(buf, parser->bufp, MIN(p - parser->bufp + 1, len));
811 parser->bufp = p + 1;