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
  51 #define FONT_LOAD(font, s) \
  52 { \
  53         gchar *fontstr, *p; \
  54  \
  55         Xstrdup_a(fontstr, s, ); \
  56         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  57         font = gdk_font_load(fontstr); \
  58 }
  59
  60 typedef struct _RemoteURI       RemoteURI;
  61
  62 struct _RemoteURI
  63 {
  64         gchar *uri;
  65
  66         guint start;
  67         guint end;
  68 };
  69
  70 static GdkColor quote_colors[3] = {
  71         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  72         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  73         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  74 };
  75
  76 static GdkColor uri_color = {
  77         (gulong)0,
  78         (gushort)0,
  79         (gushort)0,
  80         (gushort)0
  81 };
  82
  83 static GdkColor emphasis_color = {
  84         (gulong)0,
  85         (gushort)0,
  86         (gushort)0,
  87         (gushort)0xcfff
  88 };
  89
  90 static GdkColor error_color = {
  91         (gulong)0,
  92         (gushort)0xefff,
  93         (gushort)0,
  94         (gushort)0
  95 };
  96
  97 static GdkFont *spacingfont;
  98
  99 static void textview_show_html          (TextView       *textview,
 100                                          FILE           *fp,
 101                                          CodeConverter  *conv);
 102 static void textview_write_line         (TextView       *textview,
 103                                          const gchar    *str,
 104                                          CodeConverter  *conv);
 105 static GPtrArray *textview_scan_header  (TextView       *textview,
 106                                          FILE           *fp);
 107 static void textview_show_header        (TextView       *textview,
 108                                          GPtrArray      *headers);
 109
 110 static void textview_key_pressed        (GtkWidget      *widget,
 111                                          GdkEventKey    *event,
 112                                          TextView       *textview);
 113 static void textview_button_pressed     (GtkWidget      *widget,
 114                                          GdkEventButton *event,
 115                                          TextView       *textview);
 116
 117 static void textview_uri_list_remove_all(GSList         *uri_list);
 118
 119 static void textview_smooth_scroll_do           (TextView       *textview,
 120                                                  gfloat          old_value,
 121                                                  gfloat          last_value,
 122                                                  gint            step);
 123 static void textview_smooth_scroll_one_line     (TextView       *textview,
 124                                                  gboolean        up);
 125 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 126                                                  gboolean        up);
 127
 128
 129 TextView *textview_create(void)
 130 {
 131         TextView *textview;
 132         GtkWidget *vbox;
 133         GtkWidget *scrolledwin_sb;
 134         GtkWidget *scrolledwin_mb;
 135         GtkWidget *text_sb;
 136         GtkWidget *text_mb;
 137
 138         debug_print(_("Creating text view...\n"));
 139         textview = g_new0(TextView, 1);
 140
 141         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 142         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 143         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 144                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 145         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 146                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 147         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 148         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 149
 150         /* create GtkText widgets for single-byte and multi-byte character */
 151         text_sb = gtk_text_new(NULL, NULL);
 152         text_mb = gtk_text_new(NULL, NULL);
 153         gtk_widget_show(text_sb);
 154         gtk_widget_show(text_mb);
 155         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 156         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 157         gtk_widget_ensure_style(text_sb);
 158         gtk_widget_ensure_style(text_mb);
 159         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 160                 GtkStyle *style;
 161
 162                 style = gtk_style_copy(text_sb->style);
 163                 gdk_font_unref(style->font);
 164                 FONT_LOAD(style->font, NORMAL_FONT);
 165                 gtk_widget_set_style(text_sb, style);
 166         }
 167         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 168                 GtkStyle *style;
 169
 170                 style = gtk_style_copy(text_mb->style);
 171                 gdk_font_unref(style->font);
 172                 style->font = gdk_fontset_load(NORMAL_FONT);
 173                 gtk_widget_set_style(text_mb, style);
 174         }
 175         gtk_widget_ref(scrolledwin_sb);
 176         gtk_widget_ref(scrolledwin_mb);
 177
 178         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 179         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 180         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 181                            GTK_SIGNAL_FUNC(textview_key_pressed),
 182                            textview);
 183         gtk_signal_connect(GTK_OBJECT(text_sb), "button_press_event",
 184                            GTK_SIGNAL_FUNC(textview_button_pressed),
 185                            textview);
 186         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 187                            GTK_SIGNAL_FUNC(textview_key_pressed),
 188                            textview);
 189         gtk_signal_connect(GTK_OBJECT(text_mb), "button_press_event",
 190                            GTK_SIGNAL_FUNC(textview_button_pressed),
 191                            textview);
 192
 193         gtk_widget_show(scrolledwin_sb);
 194         gtk_widget_show(scrolledwin_mb);
 195
 196         vbox = gtk_vbox_new(FALSE, 0);
 197         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 198
 199         textview->vbox           = vbox;
 200         textview->scrolledwin    = scrolledwin_sb;
 201         textview->scrolledwin_sb = scrolledwin_sb;
 202         textview->scrolledwin_mb = scrolledwin_mb;
 203         textview->text           = text_sb;
 204         textview->text_sb        = text_sb;
 205         textview->text_mb        = text_mb;
 206         textview->text_is_mb     = FALSE;
 207         textview->uri_list       = NULL;
 208
 209         return textview;
 210 }
 211
 212 void textview_init(TextView *textview)
 213 {
 214         gtkut_widget_disable_theme_engine(textview->text_sb);
 215         gtkut_widget_disable_theme_engine(textview->text_mb);
 216         textview_update_message_colors();
 217         textview_set_font(textview, NULL);
 218 }
 219
 220 void textview_update_message_colors(void)
 221 {
 222         GdkColor black = {0, 0, 0, 0};
 223
 224         if (prefs_common.enable_color) {
 225                 /* grab the quote colors, converting from an int to a GdkColor */
 226                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 227                                                &quote_colors[0]);
 228                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 229                                                &quote_colors[1]);
 230                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 231                                                &quote_colors[2]);
 232                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 233                                                &uri_color);
 234         } else {
 235                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 236                         uri_color = emphasis_color = black;
 237         }
 238 }
 239
 240 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 241                            const gchar *file)
 242 {
 243         FILE *fp;
 244
 245         if ((fp = fopen(file, "r")) == NULL) {
 246                 FILE_OP_ERROR(file, "fopen");
 247                 return;
 248         }
 249
 250         textview_show_part(textview, mimeinfo, fp);
 251
 252         fclose(fp);
 253 }
 254
 255 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 256 {
 257         GtkText *text;
 258         gchar buf[BUFFSIZE];
 259         const gchar *boundary = NULL;
 260         gint boundary_len = 0;
 261         const gchar *charset = NULL;
 262         FILE *tmpfp;
 263         GPtrArray *headers = NULL;
 264         CodeConverter *conv;
 265
 266         g_return_if_fail(mimeinfo != NULL);
 267         g_return_if_fail(fp != NULL);
 268
 269         if (mimeinfo->mime_type == MIME_MULTIPART) {
 270                 if (mimeinfo->sub) {
 271                         mimeinfo = mimeinfo->sub;
 272                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 273                                 perror("fseek");
 274                                 return;
 275                         }
 276                 } else
 277                         return;
 278         }
 279         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 280                 boundary = mimeinfo->parent->boundary;
 281                 boundary_len = strlen(boundary);
 282         }
 283
 284         if (!boundary && mimeinfo->mime_type == MIME_TEXT) {
 285                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 286                         perror("fseek");
 287                 headers = textview_scan_header(textview, fp);
 288         } else {
 289                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 290                         glong fpos;
 291
 292                         if ((fpos = ftell(fp)) < 0)
 293                                 perror("ftell");
 294                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
 295                                  < 0)
 296                                 perror("fseek");
 297                         else {
 298                                 headers = textview_scan_header(textview, fp);
 299                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 300                                         perror("fseek");
 301                         }
 302                 }
 303                 while (fgets(buf, sizeof(buf), fp) != NULL)
 304                         if (buf[0] == '\r' || buf[0] == '\n') break;
 305         }
 306
 307         /* display attached RFC822 single text message */
 308         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 309                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 310                 headers = textview_scan_header(textview, fp);
 311                 mimeinfo = mimeinfo->sub;
 312         } else if (!mimeinfo->parent &&
 313                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 314                 if (!mimeinfo->sub) return;
 315                 headers = textview_scan_header(textview, fp);
 316                 mimeinfo = mimeinfo->sub;
 317         }
 318
 319         if (prefs_common.force_charset)
 320                 charset = prefs_common.force_charset;
 321         else if (mimeinfo->charset)
 322                 charset = mimeinfo->charset;
 323         textview_set_font(textview, charset);
 324
 325         conv = conv_code_converter_new(charset);
 326
 327         textview_clear(textview);
 328         text = GTK_TEXT(textview->text);
 329         gtk_text_freeze(text);
 330
 331         if (headers) {
 332                 gint i;
 333
 334                 textview_show_header(textview, headers);
 335                 for (i = 0; i < headers->len; i++) {
 336                         Header *header = g_ptr_array_index(headers, i);
 337                         g_free(header->body);
 338                         g_free(header->name);
 339                         g_free(header);
 340                 }
 341                 g_ptr_array_free(headers, TRUE);
 342         }
 343
 344         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 345         if (tmpfp) {
 346                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 347                         textview_show_html(textview, tmpfp, conv);
 348                 else
 349                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 350                                 textview_write_line(textview, buf, conv);
 351                 fclose(tmpfp);
 352         }
 353
 354         conv_code_converter_destroy(conv);
 355
 356         gtk_text_thaw(text);
 357 }
 358
 359 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 360 {
 361         GtkText *text;
 362
 363         if (!partinfo) return;
 364
 365         textview_set_font(textview, NULL);
 366         text = GTK_TEXT(textview->text);
 367         textview_clear(textview);
 368
 369         gtk_text_freeze(text);
 370
 371         gtk_text_insert
 372                 (text, textview->msgfont, NULL, NULL,
 373                  _("To save this part, pop up the context menu with\n"), -1);
 374         gtk_text_insert
 375                 (text, textview->msgfont, NULL, NULL,
 376                  _("right click and select `Save as...', or press `y' key.\n\n"), -1);
 377
 378         gtk_text_insert
 379                 (text, textview->msgfont, NULL, NULL,
 380                  _("To display this part as a text message, select\n"), -1);
 381         gtk_text_insert
 382                 (text, textview->msgfont, NULL, NULL,
 383                  _("`Display as text', or press `t' key.\n\n"), -1);
 384
 385         gtk_text_insert
 386                 (text, textview->msgfont, NULL, NULL,
 387                  _("To open this part with external program, select `Open',\n"), -1);
 388         gtk_text_insert
 389                 (text, textview->msgfont, NULL, NULL,
 390                  _("or double-click, or click the center button, or press `l' key."), -1);
 391
 392         gtk_text_thaw(text);
 393 }
 394
 395 #if USE_GPGME
 396 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 397 {
 398         GtkText *text;
 399
 400         if (!partinfo) return;
 401
 402         textview_set_font(textview, NULL);
 403         text = GTK_TEXT(textview->text);
 404         textview_clear(textview);
 405
 406         gtk_text_freeze(text);
 407
 408         if (partinfo->sigstatus_full == NULL) {
 409                 gtk_text_insert
 410                         (text, textview->msgfont, NULL, NULL,
 411                          _("This signature has not been checked yet.\n"), -1);
 412                 gtk_text_insert
 413                         (text, textview->msgfont, NULL, NULL,
 414                          _("To check it, pop up the context menu with\n"), -1);
 415                 gtk_text_insert
 416                         (text, textview->msgfont, NULL, NULL,
 417                          _("right click and select `Check signature'.\n"), -1);
 418         } else {
 419                 gtk_text_insert(text, textview->msgfont, NULL, NULL,
 420                                 partinfo->sigstatus_full, -1);
 421         }
 422
 423         gtk_text_thaw(text);
 424 }
 425 #endif /* USE_GPGME */
 426
 427 static void textview_show_html(TextView *textview, FILE *fp,
 428                                CodeConverter *conv)
 429 {
 430         HTMLParser *parser;
 431         gchar *str;
 432
 433         parser = html_parser_new(fp, conv);
 434         g_return_if_fail(parser != NULL);
 435
 436         while ((str = html_parse(parser)) != NULL) {
 437                 textview_write_line(textview, str, NULL);
 438         }
 439         html_parser_destroy(parser);
 440 }
 441
 442 /* get_uri_part() - retrieves a URI starting from scanpos.
 443                     Returns TRUE if succesful */
 444 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 445                              const gchar **bp, const gchar **ep)
 446 {
 447         const gchar *ep_;
 448
 449         g_return_val_if_fail(start != NULL, FALSE);
 450         g_return_val_if_fail(scanpos != NULL, FALSE);
 451         g_return_val_if_fail(bp != NULL, FALSE);
 452         g_return_val_if_fail(ep != NULL, FALSE);
 453
 454         *bp = scanpos;
 455
 456         /* find end point of URI */
 457         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 458                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 459                         break;
 460         }
 461
 462         /* no punctuation at end of string */
 463
 464         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 465          * should pass some URI type to this function and decide on that whether
 466          * to perform punctuation stripping */
 467
 468 #define IS_REAL_PUNCT(ch) \
 469         (ispunct(ch) && ((ch) != '/'))
 470
 471         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 472                 ;
 473
 474 #undef IS_REAL_PUNCT
 475
 476         *ep = ep_;
 477
 478         return TRUE;
 479 }
 480
 481 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 482 {
 483         return g_strndup(bp, ep - bp);
 484 }
 485
 486 /* valid mail address characters */
 487 #define IS_RFC822_CHAR(ch) \
 488         (isascii(ch) && \
 489          (ch) > 32   && \
 490          (ch) != 127 && \
 491          !isspace(ch) && \
 492          !strchr("()<>\"", (ch)))
 493
 494 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 495 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 496                                const gchar **bp, const gchar **ep)
 497 {
 498         /* more complex than the uri part because we need to scan back and forward starting from
 499          * the scan position. */
 500         gboolean result = FALSE;
 501         const gchar *bp_;
 502         const gchar *ep_;
 503
 504         g_return_val_if_fail(start != NULL, FALSE);
 505         g_return_val_if_fail(scanpos != NULL, FALSE);
 506         g_return_val_if_fail(bp != NULL, FALSE);
 507         g_return_val_if_fail(ep != NULL, FALSE);
 508
 509         /* scan start of address */
 510         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 511                 ;
 512
 513         /* TODO: should start with an alnum? */
 514         bp_++;
 515         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
 516                 ;
 517
 518         if (bp_ != scanpos) {
 519                 /* scan end of address */
 520                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 521                         ;
 522
 523                 /* TODO: really should terminate with an alnum? */
 524                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
 525                         ;
 526                 ep_++;
 527
 528                 if (ep_ > scanpos + 1) {
 529                         *ep = ep_;
 530                         *bp = bp_;
 531                         result = TRUE;
 532                 }
 533         }
 534
 535         if (result) {
 536                 /* we now have at least the address. now see if this is <bracketed>; in this
 537                  * case we also scan for the informative part. we could make this a useful
 538                  * function because it tries to parse out an email address backwards. :) */
 539                 if ( ((bp_ - 1 > start) && *(bp_ - 1) == '<') &&  (*ep_ == '>')) {
 540                         char    closure_stack[128];
 541                         char   *ptr = closure_stack;
 542 #define FULL_STACK()    ((ptr - closure_stack) >= sizeof closure_stack)
 543 #define IN_STACK()              (ptr > closure_stack)
 544 /* has underrun check */
 545 #define POP_STACK()             if(IN_STACK()) --ptr
 546 /* has overrun check */
 547 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 548 /* has underrun check */
 549 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 550
 551                         ep_++;
 552
 553                         /* scan for the informative part */
 554                         for (bp_ -= 2; bp_ >= start; bp_--) {
 555                                 /* if closure on the stack keep scanning */
 556                                 if (PEEK_STACK() == *bp_) {
 557                                         POP_STACK();
 558                                 }
 559                                 else {
 560                                         if (*bp_ == '\'' || *bp_ == '"')  {
 561                                                 PUSH_STACK(*bp_);
 562                                         }
 563                                         else {
 564                                                 if (!PEEK_STACK()) {
 565                                                         /* if nothing in the closure stack, do the special conditions
 566                                                          * the following if..else expression simply checks whether
 567                                                          * a token is acceptable. if not acceptable, the clause
 568                                                          * should terminate the loop with a 'break' */
 569                                                         if ( *bp_ == '-'
 570                                                         &&   (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 571                                                         &&   (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1))) ) {
 572                                                                 /* hyphens are allowed, but only in between alnums */
 573                                                         }
 574                                                         else if ( !ispunct(*bp_) ) {
 575                                                                 /* but anything not being a punctiation is ok */
 576                                                         }
 577                                                         else {
 578                                                                 break; /* anything else is rejected */
 579                                                         }
 580                                                 }
 581                                         }
 582                                 }
 583                         }
 584
 585                         bp_++;
 586
 587 #undef PEEK_STACK
 588 #undef PUSH_STACK
 589 #undef POP_STACK
 590 #undef IN_STACK
 591 #undef FULL_STACK
 592
 593                         /* scan forward (should start with an alnum) */
 594                         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 595                                 ;
 596
 597                         *ep = ep_;
 598                         *bp = bp_;
 599                 }
 600         }
 601         return result;
 602 }
 603
 604 #undef IS_RFC822_CHAR
 605
 606 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 607 {
 608         /* returns a mailto: URI; mailto: is also used to detect the
 609          * uri type later on in the button_pressed signal handler */
 610         gchar *tmp;
 611         gchar *result;
 612
 613         tmp = g_strndup(bp, ep - bp);
 614         result = g_strconcat("mailto:", tmp, NULL);
 615         g_free(tmp);
 616
 617         return result;
 618 }
 619
 620 #define ADD_TXT_POS(bp_, ep_, pti_) \
 621         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 622                 last = last->next; \
 623                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 624                 last->next = NULL; \
 625         } else { \
 626                 g_warning("alloc error scanning URIs\n"); \
 627                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 628                                 linebuf, -1); \
 629                 return; \
 630         }
 631
 632 /* textview_make_clickable_parts() - colorizes clickable parts */
 633 static void textview_make_clickable_parts(TextView *textview, GtkText *text,
 634                                           GdkFont  *textfont,
 635                                           GdkColor *fg_color,
 636                                           GdkColor *uri_color,
 637                                           const gchar *linebuf)
 638 {
 639         /* parse table - in order of priority */
 640         struct table {
 641                 const gchar *needle; /* token */
 642
 643                 /* token search function */
 644                 gchar    *(*search)     (const gchar *haystack,
 645                                          const gchar *needle);
 646                 /* part parsing function */
 647                 gboolean  (*parse)      (const gchar *start,
 648                                          const gchar *scanpos,
 649                                          const gchar **bp_,
 650                                          const gchar **ep_);
 651                 /* part to URI function */
 652                 gchar    *(*build_uri)  (const gchar *bp,
 653                                          const gchar *ep);
 654         };
 655
 656         static struct table parser[] = {
 657                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 658                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 659                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 660                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 661                 {"@",        strcasestr, get_email_part, make_email_string}
 662         };
 663         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 664
 665         gint  n;
 666         const gchar *walk, *bp, *ep;
 667
 668         struct txtpos {
 669                 const gchar     *bp, *ep;       /* text position */
 670                 gint             pti;           /* index in parse table */
 671                 struct txtpos   *next;          /* next */
 672         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 673
 674         /* parse for clickable parts, and build a list of begin and end positions  */
 675         for (walk = linebuf, n = 0;;) {
 676                 gint last_index = PARSE_ELEMS;
 677                 gchar *scanpos = NULL;
 678
 679                 /* FIXME: this looks phony. scanning for anything in the parse table */
 680                 for (n = 0; n < PARSE_ELEMS; n++) {
 681                         gchar *tmp;
 682
 683                         tmp = parser[n].search(walk, parser[n].needle);
 684                         if (tmp) {
 685                                 if (scanpos == NULL || tmp < scanpos) {
 686                                         scanpos = tmp;
 687                                         last_index = n;
 688                                 }
 689                         }
 690                 }
 691
 692                 if (scanpos) {
 693                         /* check if URI can be parsed */
 694                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 695                             && (ep - bp - 1) > strlen(parser[last_index].needle)) {
 696                                         ADD_TXT_POS(bp, ep, last_index);
 697                                         walk = ep;
 698                         } else
 699                                 walk = scanpos +
 700                                         strlen(parser[last_index].needle);
 701                 } else
 702                         break;
 703         }
 704
 705         /* colorize this line */
 706         if (head.next) {
 707                 const gchar *normal_text = linebuf;
 708
 709                 /* insert URIs */
 710                 for (last = head.next; last != NULL;
 711                      normal_text = last->ep, last = last->next) {
 712                         RemoteURI *uri;
 713
 714                         uri = g_new(RemoteURI, 1);
 715                         if (last->bp - normal_text > 0)
 716                                 gtk_text_insert(text, textfont,
 717                                                 fg_color, NULL,
 718                                                 normal_text,
 719                                                 last->bp - normal_text);
 720                         uri->uri = parser[last->pti].build_uri(last->bp, last->ep);
 721                         uri->start = gtk_text_get_point(text);
 722                         gtk_text_insert(text, textfont, uri_color,
 723                                         NULL, last->bp, last->ep - last->bp);
 724                         uri->end = gtk_text_get_point(text);
 725                         textview->uri_list =
 726                                 g_slist_append(textview->uri_list, uri);
 727                 }
 728
 729                 if (*normal_text)
 730                         gtk_text_insert(text, textfont, fg_color,
 731                                         NULL, normal_text, -1);
 732         } else
 733                 gtk_text_insert(text, textfont, fg_color, NULL,
 734                                 linebuf, -1);
 735 }
 736
 737 #undef ADD_TXT_POS
 738
 739 static void textview_write_line(TextView *textview, const gchar *str,
 740                                 CodeConverter *conv)
 741 {
 742         GtkText *text = GTK_TEXT(textview->text);
 743         gchar buf[BUFFSIZE];
 744         size_t len;
 745         GdkColor *fg_color;
 746         gint quotelevel = -1;
 747
 748         if (!conv)
 749                 strncpy2(buf, str, sizeof(buf));
 750         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 751                 gtk_text_insert(text, textview->msgfont,
 752                                 prefs_common.enable_color
 753                                 ? &error_color : NULL, NULL,
 754                                 "*** Warning: code conversion failed ***\n",
 755                                 -1);
 756                 return;
 757         }
 758
 759         len = strlen(buf);
 760         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 761                 buf[len - 2] = '\n';
 762                 buf[len - 1] = '\0';
 763         }
 764         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 765         fg_color = NULL;
 766
 767         /* change color of quotation
 768            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 769            Up to 3 levels of quotations are detected, and each
 770            level is colored using a different color. */
 771         if (prefs_common.enable_color && strchr(buf, '>')) {
 772                 quotelevel = get_quote_level(buf);
 773
 774                 /* set up the correct foreground color */
 775                 if (quotelevel > 2) {
 776                         /* recycle colors */
 777                         if (prefs_common.recycle_quote_colors)
 778                                 quotelevel %= 3;
 779                         else
 780                                 quotelevel = 2;
 781                 }
 782         }
 783
 784         if (quotelevel == -1)
 785                 fg_color = NULL;
 786         else
 787                 fg_color = &quote_colors[quotelevel];
 788
 789         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 790                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 791
 792         if (prefs_common.enable_color)
 793                 textview_make_clickable_parts(textview, text,
 794                                                   textview->msgfont,
 795                                               fg_color, &uri_color, buf);
 796         else
 797                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
 798                                 buf, -1);
 799 }
 800
 801 void textview_clear(TextView *textview)
 802 {
 803         GtkText *text = GTK_TEXT(textview->text);
 804
 805         gtk_text_freeze(text);
 806         gtk_text_backward_delete(text, gtk_text_get_length(text));
 807         gtk_text_thaw(text);
 808
 809         textview_uri_list_remove_all(textview->uri_list);
 810         textview->uri_list = NULL;
 811 }
 812
 813 void textview_destroy(TextView *textview)
 814 {
 815         textview_uri_list_remove_all(textview->uri_list);
 816         textview->uri_list = NULL;
 817
 818         if (!textview->scrolledwin_sb->parent)
 819                 gtk_widget_destroy(textview->scrolledwin_sb);
 820         if (!textview->scrolledwin_mb->parent)
 821                 gtk_widget_destroy(textview->scrolledwin_mb);
 822
 823         if (textview->msgfont) {
 824                 textview->msgfont->ascent = textview->prev_ascent;
 825                 textview->msgfont->descent = textview->prev_descent;
 826                 gdk_font_unref(textview->msgfont);
 827         }
 828         if (textview->boldfont)
 829                 gdk_font_unref(textview->boldfont);
 830
 831         g_free(textview);
 832 }
 833
 834 void textview_set_font(TextView *textview, const gchar *codeset)
 835 {
 836         gboolean use_fontset = TRUE;
 837
 838         /* In multi-byte mode, GtkText can't display 8bit characters
 839            correctly, so it must be single-byte mode. */
 840         if (MB_CUR_MAX > 1) {
 841                 if (codeset) {
 842                         if (!strncasecmp(codeset, "ISO-8859-", 9) ||
 843                             !strncasecmp(codeset, "KOI8-", 5)     ||
 844                             !strncasecmp(codeset, "CP", 2)        ||
 845                             !strncasecmp(codeset, "WINDOWS-", 8)  ||
 846                             !strcasecmp(codeset, "BALTIC"))
 847                                 use_fontset = FALSE;
 848                 }
 849         } else
 850                 use_fontset = FALSE;
 851
 852         if (textview->text_is_mb && !use_fontset) {
 853                 GtkWidget *parent;
 854
 855                 parent = textview->scrolledwin_mb->parent;
 856                 gtk_editable_select_region
 857                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 858                 gtk_container_remove(GTK_CONTAINER(parent),
 859                                      textview->scrolledwin_mb);
 860                 gtk_container_add(GTK_CONTAINER(parent),
 861                                   textview->scrolledwin_sb);
 862
 863                 textview->text = textview->text_sb;
 864                 textview->text_is_mb = FALSE;
 865         } else if (!textview->text_is_mb && use_fontset) {
 866                 GtkWidget *parent;
 867
 868                 parent = textview->scrolledwin_sb->parent;
 869                 gtk_editable_select_region
 870                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 871                 gtk_container_remove(GTK_CONTAINER(parent),
 872                                      textview->scrolledwin_sb);
 873                 gtk_container_add(GTK_CONTAINER(parent),
 874                                   textview->scrolledwin_mb);
 875
 876                 textview->text = textview->text_mb;
 877                 textview->text_is_mb = TRUE;
 878         }
 879
 880         if (prefs_common.textfont) {
 881                 if (textview->msgfont) {
 882                         textview->msgfont->ascent = textview->prev_ascent;
 883                         textview->msgfont->descent = textview->prev_descent;
 884                         gdk_font_unref(textview->msgfont);
 885                         textview->msgfont = NULL;
 886                 }
 887                 if (use_fontset)
 888                         textview->msgfont =
 889                                 gdk_fontset_load(prefs_common.textfont);
 890                 else {
 891                         if (MB_CUR_MAX > 1) {
 892                                 FONT_LOAD(textview->msgfont,
 893                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 894                         } else {
 895                                 FONT_LOAD(textview->msgfont,
 896                                           prefs_common.textfont);
 897                         }
 898                 }
 899
 900                 if (textview->msgfont) {
 901                         gint ascent, descent;
 902
 903                         textview->prev_ascent = textview->msgfont->ascent;
 904                         textview->prev_descent = textview->msgfont->descent;
 905                         descent = prefs_common.line_space / 2;
 906                         ascent  = prefs_common.line_space - descent;
 907                         textview->msgfont->ascent  += ascent;
 908                         textview->msgfont->descent += descent;
 909                 }
 910         }
 911
 912         if (!textview->boldfont)
 913                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 914         if (!spacingfont)
 915                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 916 }
 917
 918 enum
 919 {
 920         H_DATE          = 0,
 921         H_FROM          = 1,
 922         H_TO            = 2,
 923         H_NEWSGROUPS    = 3,
 924         H_SUBJECT       = 4,
 925         H_CC            = 5,
 926         H_REPLY_TO      = 6,
 927         H_FOLLOWUP_TO   = 7,
 928         H_X_MAILER      = 8,
 929         H_X_NEWSREADER  = 9,
 930         H_USER_AGENT    = 10,
 931         H_ORGANIZATION  = 11,
 932 };
 933
 934 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
 935 {
 936         static HeaderEntry hentry[] = {{"Date:",         NULL, FALSE},
 937                                        {"From:",         NULL, TRUE},
 938                                        {"To:",           NULL, FALSE},
 939                                        {"Newsgroups:",   NULL, FALSE},
 940                                        {"Subject:",      NULL, TRUE},
 941                                        {"Cc:",           NULL, FALSE},
 942                                        {"Reply-To:",     NULL, FALSE},
 943                                        {"Followup-To:",  NULL, FALSE},
 944                                        {"X-Mailer:",     NULL, TRUE},
 945                                        {"X-Newsreader:", NULL, TRUE},
 946                                        {"User-Agent:",   NULL, TRUE},
 947                                        {"Organization:", NULL, TRUE},
 948                                        {NULL,            NULL, FALSE}};
 949         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 950         gint hnum;
 951         HeaderEntry *hp;
 952         GPtrArray *headers;
 953
 954         g_return_val_if_fail(fp != NULL, NULL);
 955
 956         if (!prefs_common.display_header) {
 957                 while (fgets(buf, sizeof(buf), fp) != NULL)
 958                         if (buf[0] == '\r' || buf[0] == '\n') break;
 959                 return NULL;
 960         }
 961
 962         headers = g_ptr_array_new();
 963
 964         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 965                != -1) {
 966                 Header *header;
 967
 968                 hp = hentry + hnum;
 969
 970                 header = g_new(Header, 1);
 971                 header->name = g_strndup(buf, strlen(hp->name));
 972                 conv_unmime_header(tmp, sizeof(tmp), buf + strlen(hp->name),
 973                                    NULL);
 974                 header->body = g_strdup(tmp);
 975
 976                 g_ptr_array_add(headers, header);
 977         }
 978
 979         return headers;
 980 }
 981
 982 static void textview_show_header(TextView *textview, GPtrArray *headers)
 983 {
 984         GtkText *text = GTK_TEXT(textview->text);
 985         Header *header;
 986         gint i;
 987
 988         g_return_if_fail(headers != NULL);
 989
 990         gtk_text_freeze(text);
 991
 992         for (i = 0; i < headers->len; i++) {
 993                 header = g_ptr_array_index(headers, i);
 994                 g_return_if_fail(header->name != NULL);
 995
 996                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
 997                                 header->name, -1);
 998                 if (prefs_common.enable_color &&
 999                     (strncmp(header->name, "X-Mailer", 8) == 0 ||
1000                      strncmp(header->name, "X-Newsreader", 12) == 0) &&
1001                     strstr(header->body, "Sylpheed") != NULL)
1002                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1003                                         header->body, -1);
1004                 else {
1005                         if (prefs_common.enable_color) {
1006                                 textview_make_clickable_parts(textview, text,
1007                                                                                           NULL,
1008                                                                                           NULL,
1009                                                                                           &uri_color,
1010                                                                                           header->body);
1011                         }
1012                         else {
1013                                 gtk_text_insert(text, NULL, NULL, NULL,
1014                                                 header->body, -1);
1015                         }
1016                 }
1017                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1018         }
1019
1020         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1021         gtk_text_thaw(text);
1022 }
1023
1024 void textview_scroll_one_line(TextView *textview, gboolean up)
1025 {
1026         GtkText *text = GTK_TEXT(textview->text);
1027         gfloat upper;
1028
1029         if (prefs_common.enable_smooth_scroll) {
1030                 textview_smooth_scroll_one_line(textview, up);
1031                 return;
1032         }
1033
1034         if (!up) {
1035                 upper = text->vadj->upper - text->vadj->page_size;
1036                 if (text->vadj->value < upper) {
1037                         text->vadj->value +=
1038                                 text->vadj->step_increment * 4;
1039                         text->vadj->value =
1040                                 MIN(text->vadj->value, upper);
1041                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1042                                                 "value_changed");
1043                 }
1044         } else {
1045                 if (text->vadj->value > 0.0) {
1046                         text->vadj->value -=
1047                                 text->vadj->step_increment * 4;
1048                         text->vadj->value =
1049                                 MAX(text->vadj->value, 0.0);
1050                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1051                                                 "value_changed");
1052                 }
1053         }
1054 }
1055
1056 gboolean textview_scroll_page(TextView *textview, gboolean up)
1057 {
1058         GtkText *text = GTK_TEXT(textview->text);
1059         gfloat upper;
1060         gfloat page_incr;
1061
1062         if (prefs_common.enable_smooth_scroll)
1063                 return textview_smooth_scroll_page(textview, up);
1064
1065         if (prefs_common.scroll_halfpage)
1066                 page_incr = text->vadj->page_increment / 2;
1067         else
1068                 page_incr = text->vadj->page_increment;
1069
1070         if (!up) {
1071                 upper = text->vadj->upper - text->vadj->page_size;
1072                 if (text->vadj->value < upper) {
1073                         text->vadj->value += page_incr;
1074                         text->vadj->value = MIN(text->vadj->value, upper);
1075                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1076                                                 "value_changed");
1077                 } else
1078                         return FALSE;
1079         } else {
1080                 if (text->vadj->value > 0.0) {
1081                         text->vadj->value -= page_incr;
1082                         text->vadj->value = MAX(text->vadj->value, 0.0);
1083                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1084                                                 "value_changed");
1085                 } else
1086                         return FALSE;
1087         }
1088
1089         return TRUE;
1090 }
1091
1092 static void textview_smooth_scroll_do(TextView *textview,
1093                                       gfloat old_value, gfloat last_value,
1094                                       gint step)
1095 {
1096         GtkText *text = GTK_TEXT(textview->text);
1097         gint change_value;
1098         gboolean up;
1099         gint i;
1100
1101         if (old_value < last_value) {
1102                 change_value = last_value - old_value;
1103                 up = FALSE;
1104         } else {
1105                 change_value = old_value - last_value;
1106                 up = TRUE;
1107         }
1108
1109         gdk_key_repeat_disable();
1110
1111         for (i = step; i <= change_value; i += step) {
1112                 text->vadj->value = old_value + (up ? -i : i);
1113                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1114                                         "value_changed");
1115         }
1116
1117         text->vadj->value = last_value;
1118         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1119
1120         gdk_key_repeat_restore();
1121 }
1122
1123 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1124 {
1125         GtkText *text = GTK_TEXT(textview->text);
1126         gfloat upper;
1127         gfloat old_value;
1128         gfloat last_value;
1129
1130         if (!up) {
1131                 upper = text->vadj->upper - text->vadj->page_size;
1132                 if (text->vadj->value < upper) {
1133                         old_value = text->vadj->value;
1134                         last_value = text->vadj->value +
1135                                 text->vadj->step_increment * 4;
1136                         last_value = MIN(last_value, upper);
1137
1138                         textview_smooth_scroll_do(textview, old_value,
1139                                                   last_value,
1140                                                   prefs_common.scroll_step);
1141                 }
1142         } else {
1143                 if (text->vadj->value > 0.0) {
1144                         old_value = text->vadj->value;
1145                         last_value = text->vadj->value -
1146                                 text->vadj->step_increment * 4;
1147                         last_value = MAX(last_value, 0.0);
1148
1149                         textview_smooth_scroll_do(textview, old_value,
1150                                                   last_value,
1151                                                   prefs_common.scroll_step);
1152                 }
1153         }
1154 }
1155
1156 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1157 {
1158         GtkText *text = GTK_TEXT(textview->text);
1159         gfloat upper;
1160         gfloat page_incr;
1161         gfloat old_value;
1162         gfloat last_value;
1163
1164         if (prefs_common.scroll_halfpage)
1165                 page_incr = text->vadj->page_increment / 2;
1166         else
1167                 page_incr = text->vadj->page_increment;
1168
1169         if (!up) {
1170                 upper = text->vadj->upper - text->vadj->page_size;
1171                 if (text->vadj->value < upper) {
1172                         old_value = text->vadj->value;
1173                         last_value = text->vadj->value + page_incr;
1174                         last_value = MIN(last_value, upper);
1175
1176                         textview_smooth_scroll_do(textview, old_value,
1177                                                   last_value,
1178                                                   prefs_common.scroll_step);
1179                 } else
1180                         return FALSE;
1181         } else {
1182                 if (text->vadj->value > 0.0) {
1183                         old_value = text->vadj->value;
1184                         last_value = text->vadj->value - page_incr;
1185                         last_value = MAX(last_value, 0.0);
1186
1187                         textview_smooth_scroll_do(textview, old_value,
1188                                                   last_value,
1189                                                   prefs_common.scroll_step);
1190                 } else
1191                         return FALSE;
1192         }
1193
1194         return TRUE;
1195 }
1196
1197 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1198                                  TextView *textview)
1199 {
1200         SummaryView *summaryview = NULL;
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         if (event &&
1244             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1245                 || event->button == 2
1246                 || event->button == 3)) {
1247                 GSList *cur;
1248                 guint current_pos;
1249
1250                 current_pos = GTK_EDITABLE(textview->text)->current_pos;
1251
1252                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1253                         RemoteURI *uri = (RemoteURI *)cur->data;
1254
1255                         if (current_pos >= uri->start &&
1256                             current_pos <  uri->end) {
1257                                 if (!strncasecmp(uri->uri, "mailto:", 7)) {
1258                                         compose_new_with_recipient
1259                                                 (NULL, uri->uri + 7);
1260                                 }
1261                                 else
1262                                         open_uri(uri->uri,
1263                                                  prefs_common.uri_cmd);
1264                         }
1265                 }
1266         }
1267 }
1268
1269 static void textview_uri_list_remove_all(GSList *uri_list)
1270 {
1271         GSList *cur;
1272
1273         for (cur = uri_list; cur != NULL; cur = cur->next) {
1274                 if (cur->data) {
1275                         g_free(((RemoteURI *)cur->data)->uri);
1276                         g_free(cur->data);
1277                 }
1278         }
1279
1280         g_slist_free(uri_list);
1281 }