adding mail addresses to address book from the textview, and some minor gnome config...
[claws.git] / src / textview.c
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999,2000 Hiroyuki Yamamoto
4  *
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 2 of the License, or
8  * (at your option) any later version.
9  *
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.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20 #ifdef HAVE_CONFIG_H
21 #  include "config.h"
22 #endif
23
24 #include "defs.h"
25
26 #include <glib.h>
27 #include <gdk/gdk.h>
28 #include <gdk/gdkkeysyms.h>
29 #include <gtk/gtkvbox.h>
30 #include <gtk/gtkscrolledwindow.h>
31 #include <gtk/gtktext.h>
32 #include <gtk/gtksignal.h>
33 #include <stdio.h>
34 #include <ctype.h>
35 #include <string.h>
36 #include <stdlib.h>
37
38 #include "intl.h"
39 #include "main.h"
40 #include "summaryview.h"
41 #include "procheader.h"
42 #include "prefs_common.h"
43 #include "codeconv.h"
44 #include "utils.h"
45 #include "gtkutils.h"
46 #include "procmime.h"
47 #include "html.h"
48 #include "compose.h"
49 #include "addressbook.h"
50 #include "displayheader.h"
51
52 #define FONT_LOAD(font, s) \
53 { \
54         gchar *fontstr, *p; \
55  \
56         Xstrdup_a(fontstr, s, ); \
57         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
58         font = gdk_font_load(fontstr); \
59 }
60
61 typedef struct _RemoteURI       RemoteURI;
62
63 struct _RemoteURI
64 {
65         gchar *uri;
66
67         guint start;
68         guint end;
69 };
70
71 static GdkColor quote_colors[3] = {
72         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
73         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
74         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
75 };
76
77 static GdkColor uri_color = {
78         (gulong)0,
79         (gushort)0,
80         (gushort)0,
81         (gushort)0
82 };
83
84 static GdkColor emphasis_color = {
85         (gulong)0,
86         (gushort)0,
87         (gushort)0,
88         (gushort)0xcfff
89 };
90
91 static GdkColor error_color = {
92         (gulong)0,
93         (gushort)0xefff,
94         (gushort)0,
95         (gushort)0
96 };
97
98 static GdkFont *spacingfont;
99
100 static void textview_show_html          (TextView       *textview,
101                                          FILE           *fp,
102                                          CodeConverter  *conv);
103 static void textview_write_line         (TextView       *textview,
104                                          const gchar    *str,
105                                          CodeConverter  *conv);
106 static GPtrArray *textview_scan_header  (TextView       *textview,
107                                          FILE           *fp);
108 static void textview_show_header        (TextView       *textview,
109                                          GPtrArray      *headers);
110
111 static void textview_key_pressed        (GtkWidget      *widget,
112                                          GdkEventKey    *event,
113                                          TextView       *textview);
114 static void textview_button_pressed     (GtkWidget      *widget,
115                                          GdkEventButton *event,
116                                          TextView       *textview);
117
118 static void textview_uri_list_remove_all(GSList         *uri_list);
119
120 static void textview_smooth_scroll_do           (TextView       *textview,
121                                                  gfloat          old_value,
122                                                  gfloat          last_value,
123                                                  gint            step);
124 static void textview_smooth_scroll_one_line     (TextView       *textview,
125                                                  gboolean        up);
126 static gboolean textview_smooth_scroll_page     (TextView       *textview,
127                                                  gboolean        up);
128
129
130 TextView *textview_create(void)
131 {
132         TextView *textview;
133         GtkWidget *vbox;
134         GtkWidget *scrolledwin_sb;
135         GtkWidget *scrolledwin_mb;
136         GtkWidget *text_sb;
137         GtkWidget *text_mb;
138
139         debug_print(_("Creating text view...\n"));
140         textview = g_new0(TextView, 1);
141
142         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
143         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
144         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
145                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
146         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
147                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
148         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
149         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
150
151         /* create GtkText widgets for single-byte and multi-byte character */
152         text_sb = gtk_text_new(NULL, NULL);
153         text_mb = gtk_text_new(NULL, NULL);
154         gtk_widget_show(text_sb);
155         gtk_widget_show(text_mb);
156         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
157         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
158         gtk_widget_ensure_style(text_sb);
159         gtk_widget_ensure_style(text_mb);
160         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
161                 GtkStyle *style;
162
163                 style = gtk_style_copy(text_sb->style);
164                 gdk_font_unref(style->font);
165                 FONT_LOAD(style->font, NORMAL_FONT);
166                 gtk_widget_set_style(text_sb, style);
167         }
168         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
169                 GtkStyle *style;
170
171                 style = gtk_style_copy(text_mb->style);
172                 gdk_font_unref(style->font);
173                 style->font = gdk_fontset_load(NORMAL_FONT);
174                 gtk_widget_set_style(text_mb, style);
175         }
176         gtk_widget_ref(scrolledwin_sb);
177         gtk_widget_ref(scrolledwin_mb);
178
179         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
180         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
181         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
182                            GTK_SIGNAL_FUNC(textview_key_pressed),
183                            textview);
184         gtk_signal_connect(GTK_OBJECT(text_sb), "button_press_event",
185                            GTK_SIGNAL_FUNC(textview_button_pressed),
186                            textview);
187         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
188                            GTK_SIGNAL_FUNC(textview_key_pressed),
189                            textview);
190         gtk_signal_connect(GTK_OBJECT(text_mb), "button_press_event",
191                            GTK_SIGNAL_FUNC(textview_button_pressed),
192                            textview);
193
194         gtk_widget_show(scrolledwin_sb);
195         gtk_widget_show(scrolledwin_mb);
196
197         vbox = gtk_vbox_new(FALSE, 0);
198         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
199
200         textview->vbox           = vbox;
201         textview->scrolledwin    = scrolledwin_sb;
202         textview->scrolledwin_sb = scrolledwin_sb;
203         textview->scrolledwin_mb = scrolledwin_mb;
204         textview->text           = text_sb;
205         textview->text_sb        = text_sb;
206         textview->text_mb        = text_mb;
207         textview->text_is_mb     = FALSE;
208         textview->uri_list       = NULL;
209
210         return textview;
211 }
212
213 void textview_init(TextView *textview)
214 {
215         gtkut_widget_disable_theme_engine(textview->text_sb);
216         gtkut_widget_disable_theme_engine(textview->text_mb);
217         textview_update_message_colors();
218         textview_set_font(textview, NULL);
219 }
220
221 void textview_update_message_colors(void)
222 {
223         GdkColor black = {0, 0, 0, 0};
224
225         if (prefs_common.enable_color) {
226                 /* grab the quote colors, converting from an int to a GdkColor */
227                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
228                                                &quote_colors[0]);
229                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
230                                                &quote_colors[1]);
231                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
232                                                &quote_colors[2]);
233                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
234                                                &uri_color);
235         } else {
236                 quote_colors[0] = quote_colors[1] = quote_colors[2] = 
237                         uri_color = emphasis_color = black;
238         }
239 }
240
241 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
242                            const gchar *file)
243 {
244         FILE *fp;
245
246         if ((fp = fopen(file, "r")) == NULL) {
247                 FILE_OP_ERROR(file, "fopen");
248                 return;
249         }
250
251         textview_show_part(textview, mimeinfo, fp);
252
253         fclose(fp);
254 }
255
256 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
257 {
258         GtkText *text;
259         gchar buf[BUFFSIZE];
260         const gchar *boundary = NULL;
261         gint boundary_len = 0;
262         const gchar *charset = NULL;
263         FILE *tmpfp;
264         GPtrArray *headers = NULL;
265         CodeConverter *conv;
266
267         g_return_if_fail(mimeinfo != NULL);
268         g_return_if_fail(fp != NULL);
269
270         if (mimeinfo->mime_type == MIME_MULTIPART) {
271                 if (mimeinfo->sub) {
272                         mimeinfo = mimeinfo->sub;
273                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
274                                 perror("fseek");
275                                 return;
276                         }
277                 } else
278                         return;
279         }
280         if (mimeinfo->parent && mimeinfo->parent->boundary) {
281                 boundary = mimeinfo->parent->boundary;
282                 boundary_len = strlen(boundary);
283         }
284
285         if (!boundary && mimeinfo->mime_type == MIME_TEXT) {
286                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
287                         perror("fseek");
288                 headers = textview_scan_header(textview, fp);
289         } else {
290                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
291                         glong fpos;
292
293                         if ((fpos = ftell(fp)) < 0)
294                                 perror("ftell");
295                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
296                                  < 0)
297                                 perror("fseek");
298                         else {
299                                 headers = textview_scan_header(textview, fp);
300                                 if (fseek(fp, fpos, SEEK_SET) < 0)
301                                         perror("fseek");
302                         }
303                 }
304                 while (fgets(buf, sizeof(buf), fp) != NULL)
305                         if (buf[0] == '\r' || buf[0] == '\n') break;
306         }
307
308         /* display attached RFC822 single text message */
309         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
310                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
311                 headers = textview_scan_header(textview, fp);
312                 mimeinfo = mimeinfo->sub;
313         } else if (!mimeinfo->parent &&
314                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
315                 if (!mimeinfo->sub) return;
316                 headers = textview_scan_header(textview, fp);
317                 mimeinfo = mimeinfo->sub;
318         }
319
320         if (prefs_common.force_charset)
321                 charset = prefs_common.force_charset;
322         else if (mimeinfo->charset)
323                 charset = mimeinfo->charset;
324         textview_set_font(textview, charset);
325
326         conv = conv_code_converter_new(charset);
327
328         textview_clear(textview);
329         text = GTK_TEXT(textview->text);
330         gtk_text_freeze(text);
331
332         if (headers) {
333                 textview_show_header(textview, headers);
334                 procheader_header_array_destroy(headers);               
335         }
336
337         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
338         if (tmpfp) {
339                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
340                         textview_show_html(textview, tmpfp, conv);
341                 else
342                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
343                                 textview_write_line(textview, buf, conv);
344                 fclose(tmpfp);
345         }
346
347         conv_code_converter_destroy(conv);
348
349         gtk_text_thaw(text);
350 }
351
352 #define TEXT_INSERT(str) \
353         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
354
355 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
356 {
357         GtkText *text;
358
359         if (!partinfo) return;
360
361         textview_set_font(textview, NULL);
362         text = GTK_TEXT(textview->text);
363         textview_clear(textview);
364
365         gtk_text_freeze(text);
366
367         TEXT_INSERT(_("To save this part, pop up the context menu with "));
368         TEXT_INSERT(_("right click and select `Save as...', "));
369         TEXT_INSERT(_("or press `y' key.\n\n"));
370
371         TEXT_INSERT(_("To display this part as a text message, select "));
372         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
373
374         TEXT_INSERT(_("To open this part with external program, select "));
375         TEXT_INSERT(_("`Open' or `Open with...', "));
376         TEXT_INSERT(_("or double-click, or click the center button, "));
377         TEXT_INSERT(_("or press `l' key."));
378
379         gtk_text_thaw(text);
380 }
381
382 #if USE_GPGME
383 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
384 {
385         GtkText *text;
386
387         if (!partinfo) return;
388
389         textview_set_font(textview, NULL);
390         text = GTK_TEXT(textview->text);
391         textview_clear(textview);
392
393         gtk_text_freeze(text);
394
395         if (partinfo->sigstatus_full == NULL) {
396                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
397                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
398                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
399         } else {
400                 TEXT_INSERT(partinfo->sigstatus_full);
401         }
402
403         gtk_text_thaw(text);
404 }
405 #endif /* USE_GPGME */
406
407 #undef TEXT_INSERT
408
409 static void textview_show_html(TextView *textview, FILE *fp,
410                                CodeConverter *conv)
411 {
412         HTMLParser *parser;
413         gchar *str;
414
415         parser = html_parser_new(fp, conv);
416         g_return_if_fail(parser != NULL);
417
418         while ((str = html_parse(parser)) != NULL) {
419                 textview_write_line(textview, str, NULL);
420         }
421         html_parser_destroy(parser);
422 }
423
424 /* get_uri_part() - retrieves a URI starting from scanpos.
425                     Returns TRUE if succesful */
426 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
427                              const gchar **bp, const gchar **ep)
428 {
429         const gchar *ep_;
430
431         g_return_val_if_fail(start != NULL, FALSE);
432         g_return_val_if_fail(scanpos != NULL, FALSE);
433         g_return_val_if_fail(bp != NULL, FALSE);
434         g_return_val_if_fail(ep != NULL, FALSE);
435
436         *bp = scanpos;
437
438         /* find end point of URI */
439         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
440                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
441                         break;
442         }
443
444         /* no punctuation at end of string */
445
446         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
447          * should pass some URI type to this function and decide on that whether
448          * to perform punctuation stripping */
449
450 #define IS_REAL_PUNCT(ch) \
451         (ispunct(ch) && ((ch) != '/')) 
452
453         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
454                 ;
455
456 #undef IS_REAL_PUNCT
457
458         *ep = ep_;
459
460         return TRUE;            
461 }
462
463 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
464 {
465         return g_strndup(bp, ep - bp);
466 }
467
468 /* valid mail address characters */
469 #define IS_RFC822_CHAR(ch) \
470         (isascii(ch) && \
471          (ch) > 32   && \
472          (ch) != 127 && \
473          !isspace(ch) && \
474          !strchr("()<>\"", (ch)))
475
476 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
477 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
478                                const gchar **bp, const gchar **ep)
479 {
480         /* more complex than the uri part because we need to scan back and forward starting from
481          * the scan position. */
482         gboolean result = FALSE;
483         const gchar *bp_ = NULL;
484         const gchar *ep_ = NULL;
485
486         /* the informative part of the email address (describing the name
487          * of the email address owner) may contain quoted parts. the
488          * closure stack stores the last encountered quotes. */
489         gchar closure_stack[128];
490         gchar *ptr = closure_stack;
491
492         g_return_val_if_fail(start != NULL, FALSE);
493         g_return_val_if_fail(scanpos != NULL, FALSE);
494         g_return_val_if_fail(bp != NULL, FALSE);
495         g_return_val_if_fail(ep != NULL, FALSE);
496
497         /* scan start of address */
498         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
499                 ;
500
501         /* TODO: should start with an alnum? */
502         bp_++;
503         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
504                 ;
505
506         if (bp_ != scanpos) {
507                 /* scan end of address */
508                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
509                         ;
510
511                 /* TODO: really should terminate with an alnum? */
512                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
513                         ;
514                 ep_++;
515
516                 if (ep_ > scanpos + 1) {
517                         *ep = ep_;
518                         *bp = bp_;
519                         result = TRUE;
520                 }
521         }
522
523         if (!result) return FALSE;
524
525         /* we now have at least the address. now see if this is <bracketed>; in this
526          * case we also scan for the informative part. we could make this a useful
527          * function because it tries to parse out an email address backwards. :) */
528         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
529                 return TRUE;
530
531 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
532 #define IN_STACK()      (ptr > closure_stack)
533 /* has underrun check */
534 #define POP_STACK()     if(IN_STACK()) --ptr
535 /* has overrun check */
536 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
537 /* has underrun check */
538 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
539
540         ep_++;
541
542         /* scan for the informative part. */
543         for (bp_ -= 2; bp_ >= start; bp_--) {
544                 /* if closure on the stack keep scanning */
545                 if (PEEK_STACK() == *bp_) {
546                         POP_STACK();
547                         continue;
548                 }
549                 if (*bp_ == '\'' || *bp_ == '"') {
550                         PUSH_STACK(*bp_);
551                         continue;
552                 }
553
554                 /* if nothing in the closure stack, do the special conditions
555                  * the following if..else expression simply checks whether 
556                  * a token is acceptable. if not acceptable, the clause
557                  * should terminate the loop with a 'break' */
558                 if (!PEEK_STACK()) {
559                         if (*bp_ == '-'
560                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
561                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
562                                 /* hyphens are allowed, but only in
563                                    between alnums */
564                         } else if (!ispunct(*bp_)) {
565                                 /* but anything not being a punctiation
566                                    is ok */
567                         } else {
568                                 break; /* anything else is rejected */
569                         }
570                 }
571         }
572
573         bp_++;
574
575 #undef PEEK_STACK
576 #undef PUSH_STACK
577 #undef POP_STACK
578 #undef IN_STACK
579 #undef FULL_STACK
580
581         /* scan forward (should start with an alnum) */
582         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
583                 ;
584
585         *ep = ep_;
586         *bp = bp_;
587
588         return result;
589 }
590
591 #undef IS_RFC822_CHAR
592
593 static gchar *make_email_string(const gchar *bp, const gchar *ep)
594 {
595         /* returns a mailto: URI; mailto: is also used to detect the
596          * uri type later on in the button_pressed signal handler */
597         gchar *tmp;
598         gchar *result;
599
600         tmp = g_strndup(bp, ep - bp);
601         result = g_strconcat("mailto:", tmp, NULL);
602         g_free(tmp);
603
604         return result;
605 }
606
607 #define ADD_TXT_POS(bp_, ep_, pti_) \
608         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
609                 last = last->next; \
610                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
611                 last->next = NULL; \
612         } else { \
613                 g_warning("alloc error scanning URIs\n"); \
614                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
615                                 linebuf, -1); \
616                 return; \
617         }
618
619 /* textview_make_clickable_parts() - colorizes clickable parts */
620 static void textview_make_clickable_parts(TextView *textview,
621                                           GdkFont  *font,
622                                           GdkColor *fg_color,
623                                           GdkColor *uri_color,
624                                           const gchar *linebuf)
625 {
626         /* parse table - in order of priority */
627         struct table {
628                 const gchar *needle; /* token */
629
630                 /* token search function */
631                 gchar    *(*search)     (const gchar *haystack,
632                                          const gchar *needle);
633                 /* part parsing function */
634                 gboolean  (*parse)      (const gchar *start,
635                                          const gchar *scanpos,
636                                          const gchar **bp_,
637                                          const gchar **ep_);
638                 /* part to URI function */
639                 gchar    *(*build_uri)  (const gchar *bp,
640                                          const gchar *ep);
641         };
642
643         static struct table parser[] = {
644                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
645                 {"https://", strcasestr, get_uri_part,   make_uri_string},
646                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
647                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
648                 {"@",        strcasestr, get_email_part, make_email_string}
649         };
650         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
651
652         gint  n;
653         const gchar *walk, *bp, *ep;
654
655         struct txtpos {
656                 const gchar     *bp, *ep;       /* text position */
657                 gint             pti;           /* index in parse table */
658                 struct txtpos   *next;          /* next */
659         } head = {NULL, NULL, 0,  NULL}, *last = &head;
660
661         GtkText *text = GTK_TEXT(textview->text);
662
663         /* parse for clickable parts, and build a list of begin and end positions  */
664         for (walk = linebuf, n = 0;;) {
665                 gint last_index = PARSE_ELEMS;
666                 gchar *scanpos = NULL;
667
668                 /* FIXME: this looks phony. scanning for anything in the parse table */
669                 for (n = 0; n < PARSE_ELEMS; n++) {
670                         gchar *tmp;
671
672                         tmp = parser[n].search(walk, parser[n].needle);
673                         if (tmp) {
674                                 if (scanpos == NULL || tmp < scanpos) {
675                                         scanpos = tmp;
676                                         last_index = n;
677                                 }
678                         }                                       
679                 }
680
681                 if (scanpos) {
682                         /* check if URI can be parsed */
683                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
684                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
685                                         ADD_TXT_POS(bp, ep, last_index);
686                                         walk = ep;
687                         } else
688                                 walk = scanpos +
689                                         strlen(parser[last_index].needle);
690                 } else
691                         break;
692         }
693
694         /* colorize this line */
695         if (head.next) {
696                 const gchar *normal_text = linebuf;
697
698                 /* insert URIs */
699                 for (last = head.next; last != NULL;
700                      normal_text = last->ep, last = last->next) {
701                         RemoteURI *uri;
702
703                         uri = g_new(RemoteURI, 1);
704                         if (last->bp - normal_text > 0)
705                                 gtk_text_insert(text, font,
706                                                 fg_color, NULL,
707                                                 normal_text,
708                                                 last->bp - normal_text);
709                         uri->uri = parser[last->pti].build_uri(last->bp, 
710                                                 last->ep);
711                         uri->start = gtk_text_get_point(text);
712                         gtk_text_insert(text, font, uri_color,
713                                         NULL, last->bp, last->ep - last->bp);
714                         uri->end = gtk_text_get_point(text);
715                         textview->uri_list =
716                                 g_slist_append(textview->uri_list, uri);
717                 }
718
719                 if (*normal_text)
720                         gtk_text_insert(text, font, fg_color,
721                                         NULL, normal_text, -1);
722         } else
723                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
724 }
725
726 #undef ADD_TXT_POS
727
728 static void textview_write_line(TextView *textview, const gchar *str,
729                                 CodeConverter *conv)
730 {
731         GtkText *text = GTK_TEXT(textview->text);
732         gchar buf[BUFFSIZE];
733         size_t len;
734         GdkColor *fg_color;
735         gint quotelevel = -1;
736
737         if (!conv)
738                 strncpy2(buf, str, sizeof(buf));
739         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
740                 gtk_text_insert(text, textview->msgfont,
741                                 prefs_common.enable_color
742                                 ? &error_color : NULL, NULL,
743                                 "*** Warning: code conversion failed ***\n",
744                                 -1);
745                 return;
746         }
747
748         len = strlen(buf);
749         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
750                 buf[len - 2] = '\n';
751                 buf[len - 1] = '\0';
752         }
753         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
754         fg_color = NULL;
755
756         /* change color of quotation
757            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
758            Up to 3 levels of quotations are detected, and each
759            level is colored using a different color. */
760         if (prefs_common.enable_color && strchr(buf, '>')) {
761                 quotelevel = get_quote_level(buf);
762
763                 /* set up the correct foreground color */
764                 if (quotelevel > 2) {
765                         /* recycle colors */
766                         if (prefs_common.recycle_quote_colors)
767                                 quotelevel %= 3;
768                         else
769                                 quotelevel = 2;
770                 }
771         }
772
773         if (quotelevel == -1)
774                 fg_color = NULL;
775         else
776                 fg_color = &quote_colors[quotelevel];
777
778         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
779                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
780
781         if (prefs_common.enable_color)
782                 textview_make_clickable_parts(textview, textview->msgfont,
783                                               fg_color, &uri_color, buf);
784         else
785                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
786                                 buf, -1);
787 }
788
789 void textview_clear(TextView *textview)
790 {
791         GtkText *text = GTK_TEXT(textview->text);
792
793         gtk_text_freeze(text);
794         gtk_text_backward_delete(text, gtk_text_get_length(text));
795         gtk_text_thaw(text);
796
797         textview_uri_list_remove_all(textview->uri_list);
798         textview->uri_list = NULL;
799 }
800
801 void textview_destroy(TextView *textview)
802 {
803         textview_uri_list_remove_all(textview->uri_list);
804         textview->uri_list = NULL;
805
806         if (!textview->scrolledwin_sb->parent)
807                 gtk_widget_destroy(textview->scrolledwin_sb);
808         if (!textview->scrolledwin_mb->parent)
809                 gtk_widget_destroy(textview->scrolledwin_mb);
810
811         if (textview->msgfont) {
812                 textview->msgfont->ascent = textview->prev_ascent;
813                 textview->msgfont->descent = textview->prev_descent;
814                 gdk_font_unref(textview->msgfont);
815         }
816         if (textview->boldfont)
817                 gdk_font_unref(textview->boldfont);
818
819         g_free(textview);
820 }
821
822 void textview_set_font(TextView *textview, const gchar *codeset)
823 {
824         gboolean use_fontset = TRUE;
825
826         /* In multi-byte mode, GtkText can't display 8bit characters
827            correctly, so it must be single-byte mode. */
828         if (MB_CUR_MAX > 1) {
829                 if (codeset) {
830                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
831                             !g_strncasecmp(codeset, "KOI8-", 5)     ||
832                             !g_strncasecmp(codeset, "CP", 2)        ||
833                             !g_strncasecmp(codeset, "WINDOWS-", 8)  ||
834                             !g_strcasecmp(codeset, "BALTIC"))
835                                 use_fontset = FALSE;
836                 }
837         } else
838                 use_fontset = FALSE;
839
840         if (textview->text_is_mb && !use_fontset) {
841                 GtkWidget *parent;
842
843                 parent = textview->scrolledwin_mb->parent;
844                 gtk_editable_select_region
845                         (GTK_EDITABLE(textview->text_mb), 0, 0);
846                 gtk_container_remove(GTK_CONTAINER(parent),
847                                      textview->scrolledwin_mb);
848                 gtk_container_add(GTK_CONTAINER(parent),
849                                   textview->scrolledwin_sb);
850
851                 textview->text = textview->text_sb;
852                 textview->text_is_mb = FALSE;
853         } else if (!textview->text_is_mb && use_fontset) {
854                 GtkWidget *parent;
855
856                 parent = textview->scrolledwin_sb->parent;
857                 gtk_editable_select_region
858                         (GTK_EDITABLE(textview->text_sb), 0, 0);
859                 gtk_container_remove(GTK_CONTAINER(parent),
860                                      textview->scrolledwin_sb);
861                 gtk_container_add(GTK_CONTAINER(parent),
862                                   textview->scrolledwin_mb);
863
864                 textview->text = textview->text_mb;
865                 textview->text_is_mb = TRUE;
866         }
867
868         if (prefs_common.textfont) {
869                 if (textview->msgfont) {
870                         textview->msgfont->ascent = textview->prev_ascent;
871                         textview->msgfont->descent = textview->prev_descent;
872                         gdk_font_unref(textview->msgfont);
873                         textview->msgfont = NULL;
874                 }
875                 if (use_fontset)
876                         textview->msgfont =
877                                 gdk_fontset_load(prefs_common.textfont);
878                 else {
879                         if (MB_CUR_MAX > 1) {
880                                 FONT_LOAD(textview->msgfont,
881                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
882                         } else {
883                                 FONT_LOAD(textview->msgfont,
884                                           prefs_common.textfont);
885                         }
886                 }
887
888                 if (textview->msgfont) {
889                         gint ascent, descent;
890
891                         textview->prev_ascent = textview->msgfont->ascent;
892                         textview->prev_descent = textview->msgfont->descent;
893                         descent = prefs_common.line_space / 2;
894                         ascent  = prefs_common.line_space - descent;
895                         textview->msgfont->ascent  += ascent;
896                         textview->msgfont->descent += descent;
897                 }
898         }
899
900         if (!textview->boldfont)
901                 FONT_LOAD(textview->boldfont, BOLD_FONT);
902         if (!spacingfont)
903                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
904 }
905
906 enum
907 {
908         H_DATE          = 0,
909         H_FROM          = 1,
910         H_TO            = 2,
911         H_NEWSGROUPS    = 3,
912         H_SUBJECT       = 4,
913         H_CC            = 5,
914         H_REPLY_TO      = 6,
915         H_FOLLOWUP_TO   = 7,
916         H_X_MAILER      = 8,
917         H_X_NEWSREADER  = 9,
918         H_USER_AGENT    = 10,
919         H_ORGANIZATION  = 11,
920 };
921
922 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
923 {
924         gchar buf[BUFFSIZE];
925         GPtrArray *headers, *sorted_headers;
926         GSList *disphdr_list;
927         Header *header;
928         guint i;
929
930         textview = textview;
931
932         g_return_val_if_fail(fp != NULL, NULL);
933
934         if (!prefs_common.display_header) {
935                 while (fgets(buf, sizeof(buf), fp) != NULL)
936                         if (buf[0] == '\r' || buf[0] == '\n') break;
937                 return NULL;
938         }
939
940         headers = procheader_get_header_array_asis(fp);
941
942         sorted_headers = g_ptr_array_new();
943
944         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
945              disphdr_list = disphdr_list->next) {
946                 DisplayHeaderProp *dp =
947                         (DisplayHeaderProp *)disphdr_list->data;
948
949                 for (i = 0; i < headers->len; i++) {
950                         header = g_ptr_array_index(headers, i);
951
952                         if (procheader_headername_equal(header->name,
953                                                         dp->name)) {
954                                 if (dp->hidden)
955                                         procheader_header_free(header);
956                                 else
957                                         g_ptr_array_add(sorted_headers, header);
958
959                                 g_ptr_array_remove_index(headers, i);
960                                 i--;
961                         }
962                 }
963         }
964
965         if (prefs_common.show_other_header) {
966                 for (i = 0; i < headers->len; i++) {
967                         header = g_ptr_array_index(headers, i);
968                         g_ptr_array_add(sorted_headers, header);
969                 }
970         }
971
972         g_ptr_array_free(headers, TRUE);
973         return sorted_headers;
974 }
975
976 static void textview_show_header(TextView *textview, GPtrArray *headers)
977 {
978         GtkText *text = GTK_TEXT(textview->text);
979         Header *header;
980         guint i;
981
982         g_return_if_fail(headers != NULL);
983
984         gtk_text_freeze(text);
985
986         for (i = 0; i < headers->len; i++) {
987                 header = g_ptr_array_index(headers, i);
988                 g_return_if_fail(header->name != NULL);
989
990                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
991                                 header->name, -1);
992                 gtk_text_insert(text, textview->boldfont, NULL, NULL, " ", 1);
993
994                 if (procheader_headername_equal(header->name, "Subject") ||
995                     procheader_headername_equal(header->name, "From")    ||
996                     procheader_headername_equal(header->name, "To")      ||
997                     procheader_headername_equal(header->name, "Cc"))
998                         unfold_line(header->body);
999
1000                 if (prefs_common.enable_color &&
1001                     (procheader_headername_equal(header->name, "X-Mailer") ||
1002                      procheader_headername_equal(header->name,
1003                                                  "X-Newsreader")) &&
1004                     strstr(header->body, "Sylpheed") != NULL)
1005                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1006                                         header->body, -1);
1007                 else if (prefs_common.enable_color) {
1008                         textview_make_clickable_parts(textview,
1009                                                       NULL, NULL, &uri_color,
1010                                                       header->body);
1011                 } else {
1012                         gtk_text_insert(text, NULL, NULL, NULL,
1013                                         header->body, -1);
1014                 }
1015                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1016         }
1017
1018         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1019         gtk_text_thaw(text);
1020 }
1021
1022 void textview_scroll_one_line(TextView *textview, gboolean up)
1023 {
1024         GtkText *text = GTK_TEXT(textview->text);
1025         gfloat upper;
1026
1027         if (prefs_common.enable_smooth_scroll) {
1028                 textview_smooth_scroll_one_line(textview, up);
1029                 return;
1030         }
1031
1032         if (!up) {
1033                 upper = text->vadj->upper - text->vadj->page_size;
1034                 if (text->vadj->value < upper) {
1035                         text->vadj->value +=
1036                                 text->vadj->step_increment * 4;
1037                         text->vadj->value =
1038                                 MIN(text->vadj->value, upper);
1039                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1040                                                 "value_changed");
1041                 }
1042         } else {
1043                 if (text->vadj->value > 0.0) {
1044                         text->vadj->value -=
1045                                 text->vadj->step_increment * 4;
1046                         text->vadj->value =
1047                                 MAX(text->vadj->value, 0.0);
1048                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1049                                                 "value_changed");
1050                 }
1051         }
1052 }
1053
1054 gboolean textview_scroll_page(TextView *textview, gboolean up)
1055 {
1056         GtkText *text = GTK_TEXT(textview->text);
1057         gfloat upper;
1058         gfloat page_incr;
1059
1060         if (prefs_common.enable_smooth_scroll)
1061                 return textview_smooth_scroll_page(textview, up);
1062
1063         if (prefs_common.scroll_halfpage)
1064                 page_incr = text->vadj->page_increment / 2;
1065         else
1066                 page_incr = text->vadj->page_increment;
1067
1068         if (!up) {
1069                 upper = text->vadj->upper - text->vadj->page_size;
1070                 if (text->vadj->value < upper) {
1071                         text->vadj->value += page_incr;
1072                         text->vadj->value = MIN(text->vadj->value, upper);
1073                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1074                                                 "value_changed");
1075                 } else
1076                         return FALSE;
1077         } else {
1078                 if (text->vadj->value > 0.0) {
1079                         text->vadj->value -= page_incr;
1080                         text->vadj->value = MAX(text->vadj->value, 0.0);
1081                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1082                                                 "value_changed");
1083                 } else
1084                         return FALSE;
1085         }
1086
1087         return TRUE;
1088 }
1089
1090 static void textview_smooth_scroll_do(TextView *textview,
1091                                       gfloat old_value, gfloat last_value,
1092                                       gint step)
1093 {
1094         GtkText *text = GTK_TEXT(textview->text);
1095         gint change_value;
1096         gboolean up;
1097         gint i;
1098
1099         if (old_value < last_value) {
1100                 change_value = last_value - old_value;
1101                 up = FALSE;
1102         } else {
1103                 change_value = old_value - last_value;
1104                 up = TRUE;
1105         }
1106
1107         gdk_key_repeat_disable();
1108
1109         for (i = step; i <= change_value; i += step) {
1110                 text->vadj->value = old_value + (up ? -i : i);
1111                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1112                                         "value_changed");
1113         }
1114
1115         text->vadj->value = last_value;
1116         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1117
1118         gdk_key_repeat_restore();
1119 }
1120
1121 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1122 {
1123         GtkText *text = GTK_TEXT(textview->text);
1124         gfloat upper;
1125         gfloat old_value;
1126         gfloat last_value;
1127
1128         if (!up) {
1129                 upper = text->vadj->upper - text->vadj->page_size;
1130                 if (text->vadj->value < upper) {
1131                         old_value = text->vadj->value;
1132                         last_value = text->vadj->value +
1133                                 text->vadj->step_increment * 4;
1134                         last_value = MIN(last_value, upper);
1135
1136                         textview_smooth_scroll_do(textview, old_value,
1137                                                   last_value,
1138                                                   prefs_common.scroll_step);
1139                 }
1140         } else {
1141                 if (text->vadj->value > 0.0) {
1142                         old_value = text->vadj->value;
1143                         last_value = text->vadj->value -
1144                                 text->vadj->step_increment * 4;
1145                         last_value = MAX(last_value, 0.0);
1146
1147                         textview_smooth_scroll_do(textview, old_value,
1148                                                   last_value,
1149                                                   prefs_common.scroll_step);
1150                 }
1151         }
1152 }
1153
1154 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1155 {
1156         GtkText *text = GTK_TEXT(textview->text);
1157         gfloat upper;
1158         gfloat page_incr;
1159         gfloat old_value;
1160         gfloat last_value;
1161
1162         if (prefs_common.scroll_halfpage)
1163                 page_incr = text->vadj->page_increment / 2;
1164         else
1165                 page_incr = text->vadj->page_increment;
1166
1167         if (!up) {
1168                 upper = text->vadj->upper - text->vadj->page_size;
1169                 if (text->vadj->value < upper) {
1170                         old_value = text->vadj->value;
1171                         last_value = text->vadj->value + page_incr;
1172                         last_value = MIN(last_value, upper);
1173
1174                         textview_smooth_scroll_do(textview, old_value,
1175                                                   last_value,
1176                                                   prefs_common.scroll_step);
1177                 } else
1178                         return FALSE;
1179         } else {
1180                 if (text->vadj->value > 0.0) {
1181                         old_value = text->vadj->value;
1182                         last_value = text->vadj->value - page_incr;
1183                         last_value = MAX(last_value, 0.0);
1184
1185                         textview_smooth_scroll_do(textview, old_value,
1186                                                   last_value,
1187                                                   prefs_common.scroll_step);
1188                 } else
1189                         return FALSE;
1190         }
1191
1192         return TRUE;
1193 }
1194
1195 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1196                                  TextView *textview)
1197 {
1198         SummaryView *summaryview = NULL;
1199
1200         widget = widget;
1201
1202         if (!event) return;
1203         if (textview->messageview->mainwin)
1204                 summaryview = textview->messageview->mainwin->summaryview;
1205
1206         switch (event->keyval) {
1207         case GDK_Tab:
1208         case GDK_Home:
1209         case GDK_Left:
1210         case GDK_Up:
1211         case GDK_Right:
1212         case GDK_Down:
1213         case GDK_Page_Up:
1214         case GDK_Page_Down:
1215         case GDK_End:
1216         case GDK_Control_L:
1217         case GDK_Control_R:
1218                 break;
1219         case GDK_space:
1220                 if (summaryview)
1221                         summary_pass_key_press_event(summaryview, event);
1222                 else
1223                         textview_scroll_page(textview, FALSE);
1224                 break;
1225         case GDK_BackSpace:
1226         case GDK_Delete:
1227                 textview_scroll_page(textview, TRUE);
1228                 break;
1229         case GDK_Return:
1230                 textview_scroll_one_line(textview,
1231                                          (event->state & GDK_MOD1_MASK) != 0);
1232                 break;
1233         default:
1234                 if (summaryview)
1235                         summary_pass_key_press_event(summaryview, event);
1236                 break;
1237         }
1238 }
1239
1240 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1241                                     TextView *textview)
1242 {
1243         widget = widget;
1244         if (event &&
1245             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS) 
1246                 || event->button == 2
1247                 || event->button == 3)) {
1248                 GSList *cur;
1249                 guint current_pos;
1250
1251                 current_pos = GTK_EDITABLE(textview->text)->current_pos;
1252
1253                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1254                         RemoteURI *uri = (RemoteURI *)cur->data;
1255
1256                         if (current_pos >= uri->start &&
1257                             current_pos <  uri->end) {
1258                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1259                                         if (event->button == 3) {
1260                                                 gchar *fromname, *fromaddress;
1261                                                 /* extract url */
1262                                                 fromaddress = g_strdup(uri->uri + 7);
1263                                                 /* Hiroyuki: please put this function in utils.c! */
1264                                                 fromname = procheader_get_fromname(fromaddress);
1265                                                 extract_address(fromaddress);
1266                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1267                                                 addressbook_add_contact_by_menu(NULL, fromname, fromaddress, NULL);
1268                                                 g_free(fromaddress);
1269                                                 g_free(fromname);
1270                                         }
1271                                         else {
1272                                                 compose_new_with_recipient
1273                                                         (NULL, uri->uri + 7);
1274                                         }               
1275                                 }                                               
1276                                 else
1277                                         open_uri(uri->uri,
1278                                                  prefs_common.uri_cmd);
1279                         }                               
1280                 }
1281         }
1282 }
1283
1284 static void textview_uri_list_remove_all(GSList *uri_list)
1285 {
1286         GSList *cur;
1287
1288         for (cur = uri_list; cur != NULL; cur = cur->next) {
1289                 if (cur->data) {
1290                         g_free(((RemoteURI *)cur->data)->uri);
1291                         g_free(cur->data);
1292                 }
1293         }
1294
1295         g_slist_free(uri_list);
1296 }