src/textview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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/gtksignal.h>
  32 #include <stdio.h>
  33 #include <ctype.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36
  37 #include "intl.h"
  38 #include "main.h"
  39 #include "summaryview.h"
  40 #include "procheader.h"
  41 #include "prefs_common.h"
  42 #include "codeconv.h"
  43 #include "gtkstext.h"
  44 #include "utils.h"
  45 #include "gtkutils.h"
  46 #include "procmime.h"
  47 #include "html.h"
  48 #include "enriched.h"
  49 #include "compose.h"
  50 #include "addressbook.h"
  51 #include "displayheader.h"
  52 #include "account.h"
  53
  54 #define FONT_LOAD(font, s) \
  55 { \
  56         gchar *fontstr, *p; \
  57  \
  58         Xstrdup_a(fontstr, s, ); \
  59         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  60         font = gdk_font_load(fontstr); \
  61         if (!font) \
  62                 g_warning("Couldn't load the font '%s'\n", fontstr); \
  63 }
  64
  65 typedef struct _RemoteURI       RemoteURI;
  66
  67 struct _RemoteURI
  68 {
  69         gchar *uri;
  70
  71         guint start;
  72         guint end;
  73 };
  74
  75 static GdkColor quote_colors[3] = {
  76         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  77         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  78         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  79 };
  80
  81 static GdkColor uri_color = {
  82         (gulong)0,
  83         (gushort)0,
  84         (gushort)0,
  85         (gushort)0
  86 };
  87
  88 static GdkColor emphasis_color = {
  89         (gulong)0,
  90         (gushort)0,
  91         (gushort)0,
  92         (gushort)0xcfff
  93 };
  94
  95 static GdkColor error_color = {
  96         (gulong)0,
  97         (gushort)0xefff,
  98         (gushort)0,
  99         (gushort)0
 100 };
 101
 102 static GdkFont *spacingfont;
 103
 104 static void textview_show_ertf          (TextView       *textview,
 105                                          FILE           *fp,
 106                                          CodeConverter  *conv);
 107 static void textview_show_html          (TextView       *textview,
 108                                          FILE           *fp,
 109                                          CodeConverter  *conv);
 110 static void textview_write_line         (TextView       *textview,
 111                                          const gchar    *str,
 112                                          CodeConverter  *conv);
 113 static void textview_write_link         (TextView       *textview,
 114                                          const gchar    *url,
 115                                          const gchar    *str,
 116                                          CodeConverter  *conv);
 117 static GPtrArray *textview_scan_header  (TextView       *textview,
 118                                          FILE           *fp);
 119 static void textview_show_header        (TextView       *textview,
 120                                          GPtrArray      *headers);
 121
 122 static gint textview_key_pressed        (GtkWidget      *widget,
 123                                          GdkEventKey    *event,
 124                                          TextView       *textview);
 125 static gint textview_button_pressed     (GtkWidget      *widget,
 126                                          GdkEventButton *event,
 127                                          TextView       *textview);
 128 static gint textview_button_released    (GtkWidget      *widget,
 129                                          GdkEventButton *event,
 130                                          TextView       *textview);
 131
 132 static void textview_uri_list_remove_all(GSList         *uri_list);
 133
 134 static void textview_smooth_scroll_do           (TextView       *textview,
 135                                                  gfloat          old_value,
 136                                                  gfloat          last_value,
 137                                                  gint            step);
 138 static void textview_smooth_scroll_one_line     (TextView       *textview,
 139                                                  gboolean        up);
 140 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 141                                                  gboolean        up);
 142
 143
 144 TextView *textview_create(void)
 145 {
 146         TextView *textview;
 147         GtkWidget *vbox;
 148         GtkWidget *scrolledwin_sb;
 149         GtkWidget *scrolledwin_mb;
 150         GtkWidget *text_sb;
 151         GtkWidget *text_mb;
 152
 153         debug_print(_("Creating text view...\n"));
 154         textview = g_new0(TextView, 1);
 155
 156         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 157         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 158         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 159                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 160         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 161                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 162         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 163         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 164
 165         /* create GtkSText widgets for single-byte and multi-byte character */
 166         text_sb = gtk_stext_new(NULL, NULL);
 167         text_mb = gtk_stext_new(NULL, NULL);
 168         GTK_STEXT(text_sb)->default_tab_width = 8;
 169         GTK_STEXT(text_mb)->default_tab_width = 8;
 170         gtk_widget_show(text_sb);
 171         gtk_widget_show(text_mb);
 172         gtk_stext_set_word_wrap(GTK_STEXT(text_sb), TRUE);
 173         gtk_stext_set_word_wrap(GTK_STEXT(text_mb), TRUE);
 174         gtk_widget_ensure_style(text_sb);
 175         gtk_widget_ensure_style(text_mb);
 176         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 177                 GtkStyle *style;
 178                 GdkFont *font;
 179
 180                 FONT_LOAD(font, prefs_common.normalfont);
 181                 if (font) {
 182                         style = gtk_style_copy(text_sb->style);
 183                         gdk_font_unref(style->font);
 184                         style->font = font;
 185                         gtk_widget_set_style(text_sb, style);
 186                 }
 187         }
 188         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 189                 GtkStyle *style;
 190                 GdkFont *font;
 191
 192                 font = gdk_fontset_load(prefs_common.normalfont);
 193                 if (font) {
 194                         style = gtk_style_copy(text_mb->style);
 195                         gdk_font_unref(style->font);
 196                         style->font = font;
 197                         gtk_widget_set_style(text_mb, style);
 198                 }
 199         }
 200         gtk_widget_ref(scrolledwin_sb);
 201         gtk_widget_ref(scrolledwin_mb);
 202
 203         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 204         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 205         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 206                            GTK_SIGNAL_FUNC(textview_key_pressed),
 207                            textview);
 208         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 209                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 210                                  textview);
 211         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 212                                  GTK_SIGNAL_FUNC(textview_button_released),
 213                                  textview);
 214         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 215                            GTK_SIGNAL_FUNC(textview_key_pressed),
 216                            textview);
 217         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 218                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 219                                  textview);
 220         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 221                                  GTK_SIGNAL_FUNC(textview_button_released),
 222                                  textview);
 223
 224         gtk_widget_show(scrolledwin_sb);
 225         gtk_widget_show(scrolledwin_mb);
 226
 227         vbox = gtk_vbox_new(FALSE, 0);
 228         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 229
 230         textview->vbox           = vbox;
 231         textview->scrolledwin    = scrolledwin_sb;
 232         textview->scrolledwin_sb = scrolledwin_sb;
 233         textview->scrolledwin_mb = scrolledwin_mb;
 234         textview->text           = text_sb;
 235         textview->text_sb        = text_sb;
 236         textview->text_mb        = text_mb;
 237         textview->text_is_mb     = FALSE;
 238         textview->uri_list       = NULL;
 239         textview->body_pos       = 0;
 240         textview->cur_pos        = 0;
 241         textview->last_buttonpress = GDK_NOTHING;
 242
 243         return textview;
 244 }
 245
 246 void textview_init(TextView *textview)
 247 {
 248         gtkut_widget_disable_theme_engine(textview->text_sb);
 249         gtkut_widget_disable_theme_engine(textview->text_mb);
 250         textview_update_message_colors();
 251         textview_set_font(textview, NULL);
 252 }
 253
 254 void textview_update_message_colors(void)
 255 {
 256         GdkColor black = {0, 0, 0, 0};
 257
 258         if (prefs_common.enable_color) {
 259                 /* grab the quote colors, converting from an int to a GdkColor */
 260                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 261                                                &quote_colors[0]);
 262                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 263                                                &quote_colors[1]);
 264                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 265                                                &quote_colors[2]);
 266                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 267                                                &uri_color);
 268         } else {
 269                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 270                         uri_color = emphasis_color = black;
 271         }
 272 }
 273
 274 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 275                            const gchar *file)
 276 {
 277         FILE *fp;
 278
 279         if ((fp = fopen(file, "r")) == NULL) {
 280                 FILE_OP_ERROR(file, "fopen");
 281                 return;
 282         }
 283
 284         textview_show_part(textview, mimeinfo, fp);
 285
 286         fclose(fp);
 287 }
 288
 289 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 290 {
 291         GtkSText *text;
 292         gchar buf[BUFFSIZE];
 293         const gchar *boundary = NULL;
 294         gint boundary_len = 0;
 295         const gchar *charset = NULL;
 296         FILE *tmpfp;
 297         GPtrArray *headers = NULL;
 298         CodeConverter *conv;
 299
 300         g_return_if_fail(mimeinfo != NULL);
 301         g_return_if_fail(fp != NULL);
 302
 303         if (mimeinfo->mime_type == MIME_MULTIPART) {
 304                 if (mimeinfo->sub) {
 305                         mimeinfo = mimeinfo->sub;
 306                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 307                                 perror("fseek");
 308                                 return;
 309                         }
 310                 } else
 311                         return;
 312         }
 313         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 314                 boundary = mimeinfo->parent->boundary;
 315                 boundary_len = strlen(boundary);
 316         }
 317
 318         if (!boundary && (mimeinfo->mime_type == MIME_TEXT || mimeinfo->mime_type == MIME_TEXT_HTML || mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 319
 320                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 321                         perror("fseek");
 322                 headers = textview_scan_header(textview, fp);
 323         } else {
 324                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 325                         glong fpos;
 326                         MimeInfo *parent = mimeinfo->parent;
 327
 328                         while (parent->parent) {
 329                                 if (parent->main &&
 330                                     parent->main->mime_type ==
 331                                         MIME_MESSAGE_RFC822)
 332                                         break;
 333                                 parent = parent->parent;
 334                         }
 335
 336                         if ((fpos = ftell(fp)) < 0)
 337                                 perror("ftell");
 338                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 339                                 perror("fseek");
 340                         else {
 341                                 headers = textview_scan_header(textview, fp);
 342                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 343                                         perror("fseek");
 344                         }
 345                 }
 346                 /* skip MIME part headers */
 347                 while (fgets(buf, sizeof(buf), fp) != NULL)
 348                         if (buf[0] == '\r' || buf[0] == '\n') break;
 349         }
 350
 351         /* display attached RFC822 single text message */
 352         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 353                 if (headers) procheader_header_array_destroy(headers);
 354                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 355                 headers = textview_scan_header(textview, fp);
 356                 mimeinfo = mimeinfo->sub;
 357         } else if (!mimeinfo->parent &&
 358                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 359                 if (headers) procheader_header_array_destroy(headers);
 360                 if (!mimeinfo->sub) return;
 361                 headers = textview_scan_header(textview, fp);
 362                 mimeinfo = mimeinfo->sub;
 363         }
 364
 365         if (prefs_common.force_charset)
 366                 charset = prefs_common.force_charset;
 367         else if (mimeinfo->charset)
 368                 charset = mimeinfo->charset;
 369         textview_set_font(textview, charset);
 370
 371         conv = conv_code_converter_new(charset);
 372
 373         textview_clear(textview);
 374         text = GTK_STEXT(textview->text);
 375         gtk_stext_freeze(text);
 376
 377         textview->body_pos = 0;
 378         textview->cur_pos  = 0;
 379
 380         if (headers) {
 381                 textview_show_header(textview, headers);
 382                 procheader_header_array_destroy(headers);
 383         }
 384
 385 /* #if 0 */
 386         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 387
 388         if (tmpfp) {
 389                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 390                         textview_show_html(textview, tmpfp, conv);
 391                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 392                         textview_show_ertf(textview, tmpfp, conv);
 393                 else
 394                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 395                                 textview_write_line(textview, buf, conv);
 396                 fclose(tmpfp);
 397         }
 398 /* #else
 399         tmpfp = procmime_get_text_content(mimeinfo, fp);
 400
 401         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 402                 textview_write_line(textview, buf, conv);
 403
 404         fclose(tmpfp);
 405 #endif */
 406
 407         conv_code_converter_destroy(conv);
 408
 409         gtk_stext_thaw(text);
 410 }
 411
 412 #define TEXT_INSERT(str) \
 413         gtk_stext_insert(text, textview->msgfont, NULL, NULL, str, -1)
 414
 415 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 416 {
 417         GtkSText *text;
 418
 419         if (!partinfo) return;
 420
 421         textview_set_font(textview, NULL);
 422         text = GTK_STEXT(textview->text);
 423         textview_clear(textview);
 424
 425         gtk_stext_freeze(text);
 426
 427         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 428         TEXT_INSERT(_("right click and select `Save as...', "));
 429         TEXT_INSERT(_("or press `y' key.\n\n"));
 430
 431         TEXT_INSERT(_("To display this part as a text message, select "));
 432         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 433
 434         TEXT_INSERT(_("To open this part with external program, select "));
 435         TEXT_INSERT(_("`Open' or `Open with...', "));
 436         TEXT_INSERT(_("or double-click, or click the center button, "));
 437         TEXT_INSERT(_("or press `l' key."));
 438
 439         gtk_stext_thaw(text);
 440 }
 441
 442 #if USE_GPGME
 443 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 444 {
 445         GtkSText *text;
 446
 447         if (!partinfo) return;
 448
 449         textview_set_font(textview, NULL);
 450         text = GTK_STEXT(textview->text);
 451         textview_clear(textview);
 452
 453         gtk_stext_freeze(text);
 454
 455         if (partinfo->sigstatus_full == NULL) {
 456                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 457                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 458                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 459         } else {
 460                 TEXT_INSERT(partinfo->sigstatus_full);
 461         }
 462
 463         gtk_stext_thaw(text);
 464 }
 465 #endif /* USE_GPGME */
 466
 467 #undef TEXT_INSERT
 468
 469 static void textview_show_html(TextView *textview, FILE *fp,
 470                                CodeConverter *conv)
 471 {
 472         HTMLParser *parser;
 473         gchar *str;
 474         gchar* url = NULL;
 475
 476         parser = html_parser_new(fp, conv);
 477         g_return_if_fail(parser != NULL);
 478
 479         while ((str = html_parse(parser)) != NULL) {
 480                 if (parser->state == HTML_HREF) {
 481                         /* first time : get and copy the URL */
 482                         if (url == NULL) {
 483                                 /* ALF - the sylpheed html parser returns an empty string,
 484                                  * if still inside an <a>, but already parsed past HREF */
 485                                 str = strtok(str, " ");
 486                                 if (str) {
 487                                         url = strdup(str);
 488                                         /* the URL may (or not) be followed by the
 489                                          * referenced text */
 490                                         str = strtok(NULL, "");
 491                                 }
 492                         }
 493                         if (str != NULL) {
 494                                 textview_write_link(textview, url, str, NULL);
 495                         }
 496                 } else {
 497                         if (url != NULL) {
 498                                 free(url);
 499                                 url = NULL;
 500                         }
 501                         textview_write_line(textview, str, NULL);
 502                 }
 503         }
 504         html_parser_destroy(parser);
 505 }
 506
 507 static void textview_show_ertf(TextView *textview, FILE *fp,
 508                                CodeConverter *conv)
 509 {
 510         ERTFParser *parser;
 511         gchar *str;
 512         gchar* url = NULL;
 513
 514         parser = ertf_parser_new(fp, conv);
 515         g_return_if_fail(parser != NULL);
 516
 517         while ((str = ertf_parse(parser)) != NULL) {
 518                 textview_write_line(textview, str, NULL);
 519         }
 520         ertf_parser_destroy(parser);
 521 }
 522
 523 /* get_uri_part() - retrieves a URI starting from scanpos.
 524                     Returns TRUE if succesful */
 525 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 526                              const gchar **bp, const gchar **ep)
 527 {
 528         const gchar *ep_;
 529
 530         g_return_val_if_fail(start != NULL, FALSE);
 531         g_return_val_if_fail(scanpos != NULL, FALSE);
 532         g_return_val_if_fail(bp != NULL, FALSE);
 533         g_return_val_if_fail(ep != NULL, FALSE);
 534
 535         *bp = scanpos;
 536
 537         /* find end point of URI */
 538         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 539                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 540                         break;
 541         }
 542
 543         /* no punctuation at end of string */
 544
 545         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 546          * should pass some URI type to this function and decide on that whether
 547          * to perform punctuation stripping */
 548
 549 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 550
 551         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 552                 ;
 553
 554 #undef IS_REAL_PUNCT
 555
 556         *ep = ep_;
 557
 558         return TRUE;
 559 }
 560
 561 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 562 {
 563         return g_strndup(bp, ep - bp);
 564 }
 565
 566 /* valid mail address characters */
 567 #define IS_RFC822_CHAR(ch) \
 568         (isascii(ch) && \
 569          (ch) > 32   && \
 570          (ch) != 127 && \
 571          !isspace(ch) && \
 572          !strchr("()<>\"", (ch)))
 573
 574 /* alphabet and number within 7bit ASCII */
 575 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 576 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 577
 578 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 579 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 580                                const gchar **bp, const gchar **ep)
 581 {
 582         /* more complex than the uri part because we need to scan back and forward starting from
 583          * the scan position. */
 584         gboolean result = FALSE;
 585         const gchar *bp_ = NULL;
 586         const gchar *ep_ = NULL;
 587
 588         /* the informative part of the email address (describing the name
 589          * of the email address owner) may contain quoted parts. the
 590          * closure stack stores the last encountered quotes. */
 591         gchar closure_stack[128];
 592         gchar *ptr = closure_stack;
 593
 594         g_return_val_if_fail(start != NULL, FALSE);
 595         g_return_val_if_fail(scanpos != NULL, FALSE);
 596         g_return_val_if_fail(bp != NULL, FALSE);
 597         g_return_val_if_fail(ep != NULL, FALSE);
 598
 599         /* scan start of address */
 600         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 601                 ;
 602
 603         /* TODO: should start with an alnum? */
 604         bp_++;
 605         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 606                 ;
 607
 608         if (bp_ != scanpos) {
 609                 /* scan end of address */
 610                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 611                         ;
 612
 613                 /* TODO: really should terminate with an alnum? */
 614                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 615                         ;
 616                 ep_++;
 617
 618                 if (ep_ > scanpos + 1) {
 619                         *ep = ep_;
 620                         *bp = bp_;
 621                         result = TRUE;
 622                 }
 623         }
 624
 625         if (!result) return FALSE;
 626
 627         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 628         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 629                 return FALSE;
 630
 631         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 632         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 633                 return TRUE;
 634
 635 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 636 #define IN_STACK()      (ptr > closure_stack)
 637 /* has underrun check */
 638 #define POP_STACK()     if(IN_STACK()) --ptr
 639 /* has overrun check */
 640 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 641 /* has underrun check */
 642 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 643
 644         ep_++;
 645
 646         /* scan for the informative part. */
 647         for (bp_ -= 2; bp_ >= start; bp_--) {
 648                 /* if closure on the stack keep scanning */
 649                 if (PEEK_STACK() == *bp_) {
 650                         POP_STACK();
 651                         continue;
 652                 }
 653                 if (*bp_ == '\'' || *bp_ == '"') {
 654                         PUSH_STACK(*bp_);
 655                         continue;
 656                 }
 657
 658                 /* if nothing in the closure stack, do the special conditions
 659                  * the following if..else expression simply checks whether
 660                  * a token is acceptable. if not acceptable, the clause
 661                  * should terminate the loop with a 'break' */
 662                 if (!PEEK_STACK()) {
 663                         if (*bp_ == '-'
 664                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 665                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 666                                 /* hyphens are allowed, but only in
 667                                    between alnums */
 668                         } else if (!ispunct(*bp_)) {
 669                                 /* but anything not being a punctiation
 670                                    is ok */
 671                         } else {
 672                                 break; /* anything else is rejected */
 673                         }
 674                 }
 675         }
 676
 677         bp_++;
 678
 679 #undef PEEK_STACK
 680 #undef PUSH_STACK
 681 #undef POP_STACK
 682 #undef IN_STACK
 683 #undef FULL_STACK
 684
 685         /* scan forward (should start with an alnum) */
 686         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 687                 ;
 688
 689         *ep = ep_;
 690         *bp = bp_;
 691
 692         return result;
 693 }
 694
 695 #undef IS_QUOTE
 696 #undef IS_RFC822_CHAR
 697
 698 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 699 {
 700         /* returns a mailto: URI; mailto: is also used to detect the
 701          * uri type later on in the button_pressed signal handler */
 702         gchar *tmp;
 703         gchar *result;
 704
 705         tmp = g_strndup(bp, ep - bp);
 706         result = g_strconcat("mailto:", tmp, NULL);
 707         g_free(tmp);
 708
 709         return result;
 710 }
 711
 712 #define ADD_TXT_POS(bp_, ep_, pti_) \
 713         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 714                 last = last->next; \
 715                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 716                 last->next = NULL; \
 717         } else { \
 718                 g_warning("alloc error scanning URIs\n"); \
 719                 gtk_stext_insert(text, textview->msgfont, fg_color, NULL, \
 720                                 linebuf, -1); \
 721                 return; \
 722         }
 723
 724 /* textview_make_clickable_parts() - colorizes clickable parts */
 725 static void textview_make_clickable_parts(TextView *textview,
 726                                           GdkFont *font,
 727                                           GdkColor *fg_color,
 728                                           GdkColor *uri_color,
 729                                           const gchar *linebuf)
 730 {
 731         /* parse table - in order of priority */
 732         struct table {
 733                 const gchar *needle; /* token */
 734
 735                 /* token search function */
 736                 gchar    *(*search)     (const gchar *haystack,
 737                                          const gchar *needle);
 738                 /* part parsing function */
 739                 gboolean  (*parse)      (const gchar *start,
 740                                          const gchar *scanpos,
 741                                          const gchar **bp_,
 742                                          const gchar **ep_);
 743                 /* part to URI function */
 744                 gchar    *(*build_uri)  (const gchar *bp,
 745                                          const gchar *ep);
 746         };
 747
 748         static struct table parser[] = {
 749                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 750                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 751                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 752                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 753                 {"@",        strcasestr, get_email_part, make_email_string}
 754         };
 755         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 756
 757         gint  n;
 758         const gchar *walk, *bp, *ep;
 759
 760         struct txtpos {
 761                 const gchar     *bp, *ep;       /* text position */
 762                 gint             pti;           /* index in parse table */
 763                 struct txtpos   *next;          /* next */
 764         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 765
 766         GtkSText *text = GTK_STEXT(textview->text);
 767
 768         /* parse for clickable parts, and build a list of begin and end positions  */
 769         for (walk = linebuf, n = 0;;) {
 770                 gint last_index = PARSE_ELEMS;
 771                 gchar *scanpos = NULL;
 772
 773                 /* FIXME: this looks phony. scanning for anything in the parse table */
 774                 for (n = 0; n < PARSE_ELEMS; n++) {
 775                         gchar *tmp;
 776
 777                         tmp = parser[n].search(walk, parser[n].needle);
 778                         if (tmp) {
 779                                 if (scanpos == NULL || tmp < scanpos) {
 780                                         scanpos = tmp;
 781                                         last_index = n;
 782                                 }
 783                         }
 784                 }
 785
 786                 if (scanpos) {
 787                         /* check if URI can be parsed */
 788                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 789                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 790                                         ADD_TXT_POS(bp, ep, last_index);
 791                                         walk = ep;
 792                         } else
 793                                 walk = scanpos +
 794                                         strlen(parser[last_index].needle);
 795                 } else
 796                         break;
 797         }
 798
 799         /* colorize this line */
 800         if (head.next) {
 801                 const gchar *normal_text = linebuf;
 802
 803                 /* insert URIs */
 804                 for (last = head.next; last != NULL;
 805                      normal_text = last->ep, last = last->next) {
 806                         RemoteURI *uri;
 807
 808                         uri = g_new(RemoteURI, 1);
 809                         if (last->bp - normal_text > 0)
 810                                 gtk_stext_insert(text, font,
 811                                                 fg_color, NULL,
 812                                                 normal_text,
 813                                                 last->bp - normal_text);
 814                         uri->uri = parser[last->pti].build_uri(last->bp,
 815                                                                last->ep);
 816                         uri->start = gtk_stext_get_point(text);
 817                         gtk_stext_insert(text, font, uri_color,
 818                                         NULL, last->bp, last->ep - last->bp);
 819                         uri->end = gtk_stext_get_point(text);
 820                         textview->uri_list =
 821                                 g_slist_append(textview->uri_list, uri);
 822                 }
 823
 824                 if (*normal_text)
 825                         gtk_stext_insert(text, font, fg_color,
 826                                         NULL, normal_text, -1);
 827         } else
 828                 gtk_stext_insert(text, font, fg_color, NULL, linebuf, -1);
 829 }
 830
 831 #undef ADD_TXT_POS
 832
 833 /* This function writes str as a double-clickable link with the given url. */
 834 static void textview_write_link(TextView *textview, const gchar *url,
 835                                 const gchar *str, CodeConverter *conv)
 836 {
 837     GdkColor *link_color = NULL;
 838     RemoteURI* uri;
 839     GtkSText *text = GTK_STEXT(textview->text);
 840     gchar buf[BUFFSIZE];
 841
 842     /* this part is taken from textview_write_line. Right now the only place
 843      * that calls this function passes NULL for conv, but you never know. */
 844     if (!conv)
 845             strncpy2(buf, str, sizeof(buf));
 846     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 847             gtk_stext_insert(text, textview->msgfont,
 848                             prefs_common.enable_color
 849                             ? &error_color : NULL, NULL,
 850                             "*** Warning: code conversion failed ***\n",
 851                             -1);
 852             return;
 853     }
 854
 855     /* this part is based on the code in make_clickable_parts */
 856     if (prefs_common.enable_color) {
 857         link_color = &uri_color;
 858     }
 859     uri = g_new(RemoteURI, 1);
 860     uri->uri = g_strdup(url);
 861     uri->start = gtk_stext_get_point(text);
 862     gtk_stext_insert(text, textview->msgfont, link_color, NULL, buf,
 863                     strlen(buf));
 864     uri->end = gtk_stext_get_point(text);
 865     textview->uri_list = g_slist_append(textview->uri_list, uri);
 866 }
 867
 868 static void textview_write_line(TextView *textview, const gchar *str,
 869                                 CodeConverter *conv)
 870 {
 871         GtkSText *text = GTK_STEXT(textview->text);
 872         gchar buf[BUFFSIZE];
 873         GdkColor *fg_color;
 874         gint quotelevel = -1;
 875
 876         if (!conv)
 877                 strncpy2(buf, str, sizeof(buf));
 878         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 879                 gtk_stext_insert(text, textview->msgfont,
 880                                 prefs_common.enable_color
 881                                 ? &error_color : NULL, NULL,
 882                                 "*** Warning: code conversion failed ***\n",
 883                                 -1);
 884                 return;
 885         }
 886
 887         strcrchomp(buf);
 888         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 889         fg_color = NULL;
 890
 891         /* change color of quotation
 892            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 893            Up to 3 levels of quotations are detected, and each
 894            level is colored using a different color. */
 895         if (prefs_common.enable_color && strchr(buf, '>')) {
 896                 quotelevel = get_quote_level(buf);
 897
 898                 /* set up the correct foreground color */
 899                 if (quotelevel > 2) {
 900                         /* recycle colors */
 901                         if (prefs_common.recycle_quote_colors)
 902                                 quotelevel %= 3;
 903                         else
 904                                 quotelevel = 2;
 905                 }
 906         }
 907
 908         if (quotelevel == -1)
 909                 fg_color = NULL;
 910         else
 911                 fg_color = &quote_colors[quotelevel];
 912
 913         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 914                 gtk_stext_insert(text, spacingfont, NULL, NULL, " ", 1);
 915
 916         if (prefs_common.enable_color)
 917                 textview_make_clickable_parts(textview, textview->msgfont,
 918                                               fg_color, &uri_color, buf);
 919         else
 920                 textview_make_clickable_parts(textview, textview->msgfont,
 921                                               fg_color, NULL, buf);
 922 }
 923
 924 void textview_clear(TextView *textview)
 925 {
 926         GtkSText *text = GTK_STEXT(textview->text);
 927
 928         gtk_stext_freeze(text);
 929         gtk_stext_set_point(text, 0);
 930         gtk_stext_forward_delete(text, gtk_stext_get_length(text));
 931         gtk_stext_thaw(text);
 932
 933         textview_uri_list_remove_all(textview->uri_list);
 934         textview->uri_list = NULL;
 935 }
 936
 937 void textview_destroy(TextView *textview)
 938 {
 939         textview_uri_list_remove_all(textview->uri_list);
 940         textview->uri_list = NULL;
 941
 942         if (!textview->scrolledwin_sb->parent)
 943                 gtk_widget_destroy(textview->scrolledwin_sb);
 944         if (!textview->scrolledwin_mb->parent)
 945                 gtk_widget_destroy(textview->scrolledwin_mb);
 946
 947         if (textview->msgfont) {
 948                 textview->msgfont->ascent = textview->prev_ascent;
 949                 textview->msgfont->descent = textview->prev_descent;
 950                 gdk_font_unref(textview->msgfont);
 951         }
 952         if (textview->boldfont)
 953                 gdk_font_unref(textview->boldfont);
 954
 955         g_free(textview);
 956 }
 957
 958 void textview_set_font(TextView *textview, const gchar *codeset)
 959 {
 960         gboolean use_fontset = TRUE;
 961
 962         /* In multi-byte mode, GtkSText can't display 8bit characters
 963            correctly, so it must be single-byte mode. */
 964         if (MB_CUR_MAX > 1) {
 965                 if (codeset) {
 966                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 967                             !g_strcasecmp(codeset, "BALTIC"))
 968                                 use_fontset = FALSE;
 969                         else if (conv_get_current_charset() != C_EUC_JP &&
 970                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
 971                                   !g_strncasecmp(codeset, "CP", 2)    ||
 972                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
 973                                 use_fontset = FALSE;
 974                 }
 975         } else
 976                 use_fontset = FALSE;
 977
 978         if (textview->text_is_mb && !use_fontset) {
 979                 GtkWidget *parent;
 980
 981                 parent = textview->scrolledwin_mb->parent;
 982                 gtkut_container_remove(GTK_CONTAINER(parent),
 983                                        textview->scrolledwin_mb);
 984                 gtk_container_add(GTK_CONTAINER(parent),
 985                                   textview->scrolledwin_sb);
 986
 987                 textview->text = textview->text_sb;
 988                 textview->text_is_mb = FALSE;
 989         } else if (!textview->text_is_mb && use_fontset) {
 990                 GtkWidget *parent;
 991
 992                 parent = textview->scrolledwin_sb->parent;
 993                 gtkut_container_remove(GTK_CONTAINER(parent),
 994                                        textview->scrolledwin_sb);
 995                 gtk_container_add(GTK_CONTAINER(parent),
 996                                   textview->scrolledwin_mb);
 997
 998                 textview->text = textview->text_mb;
 999                 textview->text_is_mb = TRUE;
1000         }
1001
1002         if (prefs_common.textfont) {
1003                 if (textview->msgfont) {
1004                         textview->msgfont->ascent = textview->prev_ascent;
1005                         textview->msgfont->descent = textview->prev_descent;
1006                         gdk_font_unref(textview->msgfont);
1007                         textview->msgfont = NULL;
1008                 }
1009                 if (use_fontset)
1010                         textview->msgfont =
1011                                 gdk_fontset_load(prefs_common.textfont);
1012                 else {
1013                         if (MB_CUR_MAX > 1) {
1014                                 FONT_LOAD(textview->msgfont,
1015                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
1016                         } else {
1017                                 FONT_LOAD(textview->msgfont,
1018                                           prefs_common.textfont);
1019                         }
1020                 }
1021
1022                 if (textview->msgfont) {
1023                         gint ascent, descent;
1024
1025                         textview->prev_ascent = textview->msgfont->ascent;
1026                         textview->prev_descent = textview->msgfont->descent;
1027                         descent = prefs_common.line_space / 2;
1028                         ascent  = prefs_common.line_space - descent;
1029                         textview->msgfont->ascent  += ascent;
1030                         textview->msgfont->descent += descent;
1031                 }
1032         }
1033
1034         if (!textview->boldfont)
1035                 FONT_LOAD(textview->boldfont, BOLD_FONT);
1036         if (!spacingfont)
1037                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1038 }
1039
1040 enum
1041 {
1042         H_DATE          = 0,
1043         H_FROM          = 1,
1044         H_TO            = 2,
1045         H_NEWSGROUPS    = 3,
1046         H_SUBJECT       = 4,
1047         H_CC            = 5,
1048         H_REPLY_TO      = 6,
1049         H_FOLLOWUP_TO   = 7,
1050         H_X_MAILER      = 8,
1051         H_X_NEWSREADER  = 9,
1052         H_USER_AGENT    = 10,
1053         H_ORGANIZATION  = 11,
1054 };
1055
1056 void textview_set_position(TextView *textview, gint pos)
1057 {
1058         if (pos < 0) {
1059                 textview->cur_pos =
1060                         gtk_stext_get_length(GTK_STEXT(textview->text));
1061         } else {
1062                 textview->cur_pos = pos;
1063         }
1064 }
1065
1066 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1067 {
1068         gchar buf[BUFFSIZE];
1069         GPtrArray *headers, *sorted_headers;
1070         GSList *disphdr_list;
1071         Header *header;
1072         gint i;
1073
1074         g_return_val_if_fail(fp != NULL, NULL);
1075
1076         if (!prefs_common.display_header) {
1077                 while (fgets(buf, sizeof(buf), fp) != NULL)
1078                         if (buf[0] == '\r' || buf[0] == '\n') break;
1079                 return NULL;
1080         }
1081
1082         headers = procheader_get_header_array_asis(fp);
1083
1084         sorted_headers = g_ptr_array_new();
1085
1086         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1087              disphdr_list = disphdr_list->next) {
1088                 DisplayHeaderProp *dp =
1089                         (DisplayHeaderProp *)disphdr_list->data;
1090
1091                 for (i = 0; i < headers->len; i++) {
1092                         header = g_ptr_array_index(headers, i);
1093
1094                         if (procheader_headername_equal(header->name,
1095                                                         dp->name)) {
1096                                 if (dp->hidden)
1097                                         procheader_header_free(header);
1098                                 else
1099                                         g_ptr_array_add(sorted_headers, header);
1100
1101                                 g_ptr_array_remove_index(headers, i);
1102                                 i--;
1103                         }
1104                 }
1105         }
1106
1107         if (prefs_common.show_other_header) {
1108                 for (i = 0; i < headers->len; i++) {
1109                         header = g_ptr_array_index(headers, i);
1110                         g_ptr_array_add(sorted_headers, header);
1111                 }
1112         }
1113
1114         g_ptr_array_free(headers, FALSE);
1115
1116         return sorted_headers;
1117 }
1118
1119 static void textview_show_header(TextView *textview, GPtrArray *headers)
1120 {
1121         GtkSText *text = GTK_STEXT(textview->text);
1122         Header *header;
1123         gint i;
1124
1125         g_return_if_fail(headers != NULL);
1126
1127         gtk_stext_freeze(text);
1128
1129         for (i = 0; i < headers->len; i++) {
1130                 header = g_ptr_array_index(headers, i);
1131                 g_return_if_fail(header->name != NULL);
1132
1133                 gtk_stext_insert(text, textview->boldfont, NULL, NULL,
1134                                 header->name, -1);
1135                 if (header->name[strlen(header->name) - 1] != ' ')
1136                         gtk_stext_insert(text, textview->boldfont,
1137                                         NULL, NULL, " ", 1);
1138
1139                 if (procheader_headername_equal(header->name, "Subject") ||
1140                     procheader_headername_equal(header->name, "From")    ||
1141                     procheader_headername_equal(header->name, "To")      ||
1142                     procheader_headername_equal(header->name, "Cc"))
1143                         unfold_line(header->body);
1144
1145                 if (prefs_common.enable_color &&
1146                     (procheader_headername_equal(header->name, "X-Mailer") ||
1147                      procheader_headername_equal(header->name,
1148                                                  "X-Newsreader")) &&
1149                     strstr(header->body, "Sylpheed") != NULL)
1150                         gtk_stext_insert(text, NULL, &emphasis_color, NULL,
1151                                         header->body, -1);
1152                 else if (prefs_common.enable_color) {
1153                         textview_make_clickable_parts(textview,
1154                                                       NULL, NULL, &uri_color,
1155                                                       header->body);
1156                 } else {
1157                         textview_make_clickable_parts(textview,
1158                                                       NULL, NULL, NULL,
1159                                                       header->body);
1160                 }
1161                 gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1162         }
1163
1164         gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1165         gtk_stext_thaw(text);
1166         textview->body_pos = gtk_stext_get_length(text);
1167 }
1168
1169 gboolean textview_search_string(TextView *textview, const gchar *str,
1170                                 gboolean case_sens)
1171 {
1172         GtkSText *text = GTK_STEXT(textview->text);
1173         gint pos;
1174         wchar_t *wcs;
1175         gint len;
1176         gint text_len;
1177         gboolean found = FALSE;
1178
1179         g_return_val_if_fail(str != NULL, FALSE);
1180
1181         wcs = strdup_mbstowcs(str);
1182         g_return_val_if_fail(wcs != NULL, FALSE);
1183         len = wcslen(wcs);
1184         pos = textview->cur_pos;
1185         if (pos < textview->body_pos)
1186                 pos = textview->body_pos;
1187         text_len = gtk_stext_get_length(text);
1188         if (text_len - pos < len) {
1189                 g_free(wcs);
1190                 return FALSE;
1191         }
1192
1193         for (; pos < text_len; pos++) {
1194                 if (text_len - pos < len) break;
1195                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1196                     == TRUE) {
1197                         gtk_editable_set_position(GTK_EDITABLE(text),
1198                                                   pos + len);
1199                         gtk_editable_select_region(GTK_EDITABLE(text),
1200                                                    pos, pos + len);
1201                         textview_set_position(textview, pos + len);
1202                         found = TRUE;
1203                         break;
1204                 }
1205                 if (text_len - pos == len) break;
1206         }
1207
1208         g_free(wcs);
1209         return found;
1210 }
1211
1212 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1213                                          gboolean case_sens)
1214 {
1215         GtkSText *text = GTK_STEXT(textview->text);
1216         gint pos;
1217         wchar_t *wcs;
1218         gint len;
1219         gint text_len;
1220         gboolean found = FALSE;
1221
1222         g_return_val_if_fail(str != NULL, FALSE);
1223
1224         wcs = strdup_mbstowcs(str);
1225         g_return_val_if_fail(wcs != NULL, FALSE);
1226         len = wcslen(wcs);
1227         pos = textview->cur_pos;
1228         text_len = gtk_stext_get_length(text);
1229         if (text_len - textview->body_pos < len) {
1230                 g_free(wcs);
1231                 return FALSE;
1232         }
1233         if (pos <= textview->body_pos || text_len - pos < len)
1234                 pos = text_len - len;
1235
1236         for (; pos >= textview->body_pos; pos--) {
1237                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1238                     == TRUE) {
1239                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1240                         gtk_editable_select_region(GTK_EDITABLE(text),
1241                                                    pos, pos + len);
1242                         textview_set_position(textview, pos - 1);
1243                         found = TRUE;
1244                         break;
1245                 }
1246                 if (pos == textview->body_pos) break;
1247         }
1248
1249         g_free(wcs);
1250         return found;
1251 }
1252
1253 void textview_scroll_one_line(TextView *textview, gboolean up)
1254 {
1255         GtkSText *text = GTK_STEXT(textview->text);
1256         gfloat upper;
1257
1258         if (prefs_common.enable_smooth_scroll) {
1259                 textview_smooth_scroll_one_line(textview, up);
1260                 return;
1261         }
1262
1263         if (!up) {
1264                 upper = text->vadj->upper - text->vadj->page_size;
1265                 if (text->vadj->value < upper) {
1266                         text->vadj->value +=
1267                                 text->vadj->step_increment * 4;
1268                         text->vadj->value =
1269                                 MIN(text->vadj->value, upper);
1270                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1271                                                 "value_changed");
1272                 }
1273         } else {
1274                 if (text->vadj->value > 0.0) {
1275                         text->vadj->value -=
1276                                 text->vadj->step_increment * 4;
1277                         text->vadj->value =
1278                                 MAX(text->vadj->value, 0.0);
1279                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1280                                                 "value_changed");
1281                 }
1282         }
1283 }
1284
1285 gboolean textview_scroll_page(TextView *textview, gboolean up)
1286 {
1287         GtkSText *text = GTK_STEXT(textview->text);
1288         gfloat upper;
1289         gfloat page_incr;
1290
1291         if (prefs_common.enable_smooth_scroll)
1292                 return textview_smooth_scroll_page(textview, up);
1293
1294         if (prefs_common.scroll_halfpage)
1295                 page_incr = text->vadj->page_increment / 2;
1296         else
1297                 page_incr = text->vadj->page_increment;
1298
1299         if (!up) {
1300                 upper = text->vadj->upper - text->vadj->page_size;
1301                 if (text->vadj->value < upper) {
1302                         text->vadj->value += page_incr;
1303                         text->vadj->value = MIN(text->vadj->value, upper);
1304                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1305                                                 "value_changed");
1306                 } else
1307                         return FALSE;
1308         } else {
1309                 if (text->vadj->value > 0.0) {
1310                         text->vadj->value -= page_incr;
1311                         text->vadj->value = MAX(text->vadj->value, 0.0);
1312                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1313                                                 "value_changed");
1314                 } else
1315                         return FALSE;
1316         }
1317
1318         return TRUE;
1319 }
1320
1321 static void textview_smooth_scroll_do(TextView *textview,
1322                                       gfloat old_value, gfloat last_value,
1323                                       gint step)
1324 {
1325         GtkSText *text = GTK_STEXT(textview->text);
1326         gint change_value;
1327         gboolean up;
1328         gint i;
1329
1330         if (old_value < last_value) {
1331                 change_value = last_value - old_value;
1332                 up = FALSE;
1333         } else {
1334                 change_value = old_value - last_value;
1335                 up = TRUE;
1336         }
1337
1338         gdk_key_repeat_disable();
1339
1340         for (i = step; i <= change_value; i += step) {
1341                 text->vadj->value = old_value + (up ? -i : i);
1342                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1343                                         "value_changed");
1344         }
1345
1346         text->vadj->value = last_value;
1347         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1348
1349         gdk_key_repeat_restore();
1350 }
1351
1352 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1353 {
1354         GtkSText *text = GTK_STEXT(textview->text);
1355         gfloat upper;
1356         gfloat old_value;
1357         gfloat last_value;
1358
1359         if (!up) {
1360                 upper = text->vadj->upper - text->vadj->page_size;
1361                 if (text->vadj->value < upper) {
1362                         old_value = text->vadj->value;
1363                         last_value = text->vadj->value +
1364                                 text->vadj->step_increment * 4;
1365                         last_value = MIN(last_value, upper);
1366
1367                         textview_smooth_scroll_do(textview, old_value,
1368                                                   last_value,
1369                                                   prefs_common.scroll_step);
1370                 }
1371         } else {
1372                 if (text->vadj->value > 0.0) {
1373                         old_value = text->vadj->value;
1374                         last_value = text->vadj->value -
1375                                 text->vadj->step_increment * 4;
1376                         last_value = MAX(last_value, 0.0);
1377
1378                         textview_smooth_scroll_do(textview, old_value,
1379                                                   last_value,
1380                                                   prefs_common.scroll_step);
1381                 }
1382         }
1383 }
1384
1385 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1386 {
1387         GtkSText *text = GTK_STEXT(textview->text);
1388         gfloat upper;
1389         gfloat page_incr;
1390         gfloat old_value;
1391         gfloat last_value;
1392
1393         if (prefs_common.scroll_halfpage)
1394                 page_incr = text->vadj->page_increment / 2;
1395         else
1396                 page_incr = text->vadj->page_increment;
1397
1398         if (!up) {
1399                 upper = text->vadj->upper - text->vadj->page_size;
1400                 if (text->vadj->value < upper) {
1401                         old_value = text->vadj->value;
1402                         last_value = text->vadj->value + page_incr;
1403                         last_value = MIN(last_value, upper);
1404
1405                         textview_smooth_scroll_do(textview, old_value,
1406                                                   last_value,
1407                                                   prefs_common.scroll_step);
1408                 } else
1409                         return FALSE;
1410         } else {
1411                 if (text->vadj->value > 0.0) {
1412                         old_value = text->vadj->value;
1413                         last_value = text->vadj->value - page_incr;
1414                         last_value = MAX(last_value, 0.0);
1415
1416                         textview_smooth_scroll_do(textview, old_value,
1417                                                   last_value,
1418                                                   prefs_common.scroll_step);
1419                 } else
1420                         return FALSE;
1421         }
1422
1423         return TRUE;
1424 }
1425
1426 #define KEY_PRESS_EVENT_STOP() \
1427         if (gtk_signal_n_emissions_by_name \
1428                 (GTK_OBJECT(widget), "key_press_event") > 0) { \
1429                 gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), \
1430                                              "key_press_event"); \
1431         }
1432
1433 static gint textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1434                                  TextView *textview)
1435 {
1436         SummaryView *summaryview = NULL;
1437         MessageView *messageview = textview->messageview;
1438
1439         if (!event) return FALSE;
1440         if (messageview->mainwin)
1441                 summaryview = messageview->mainwin->summaryview;
1442
1443         switch (event->keyval) {
1444         case GDK_Tab:
1445         case GDK_Home:
1446         case GDK_Left:
1447         case GDK_Up:
1448         case GDK_Right:
1449         case GDK_Down:
1450         case GDK_Page_Up:
1451         case GDK_Page_Down:
1452         case GDK_End:
1453         case GDK_Control_L:
1454         case GDK_Control_R:
1455                 break;
1456         case GDK_space:
1457                 if (summaryview)
1458                         summary_pass_key_press_event(summaryview, event);
1459                 else
1460                         textview_scroll_page(textview, FALSE);
1461                 break;
1462         case GDK_BackSpace:
1463                 textview_scroll_page(textview, TRUE);
1464                 break;
1465         case GDK_Return:
1466                 textview_scroll_one_line(textview,
1467                                          (event->state & GDK_MOD1_MASK) != 0);
1468                 break;
1469         case GDK_n:
1470         case GDK_N:
1471         case GDK_p:
1472         case GDK_P:
1473         case GDK_y:
1474         case GDK_t:
1475         case GDK_l:
1476                 if (messageview->type == MVIEW_MIME) {
1477                         KEY_PRESS_EVENT_STOP();
1478                         mimeview_pass_key_press_event(messageview->mimeview,
1479                                                       event);
1480                         break;
1481                 }
1482                 /* fall through */
1483         default:
1484                 if (summaryview)
1485                         summary_pass_key_press_event(summaryview, event);
1486                 break;
1487         }
1488
1489         return TRUE;
1490 }
1491
1492 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1493                                     TextView *textview)
1494 {
1495         if (event)
1496                 textview->last_buttonpress = event->type;
1497         return FALSE;
1498 }
1499
1500 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1501                                     TextView *textview)
1502 {
1503         textview->cur_pos =
1504                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1505
1506         if (event &&
1507             ((event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS)
1508              || event->button == 2 || event->button == 3)) {
1509                 GSList *cur;
1510
1511                 /* double click seems to set the cursor after the current
1512                  * word. The cursor position needs fixing, otherwise the
1513                  * last word of a clickable zone will not work */
1514                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1515                         textview->cur_pos--;
1516                 }
1517
1518                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1519                         RemoteURI *uri = (RemoteURI *)cur->data;
1520
1521                         if (textview->cur_pos >= uri->start &&
1522                             textview->cur_pos <  uri->end) {
1523                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1524                                         if (event->button == 3) {
1525                                                 gchar *fromname, *fromaddress;
1526                                                 GdkEventButton tmpev;
1527
1528                                                 /* extract url */
1529                                                 fromaddress = g_strdup(uri->uri + 7);
1530                                                 /* Hiroyuki: please put this function in utils.c! */
1531                                                 fromname = procheader_get_fromname(fromaddress);
1532                                                 extract_address(fromaddress);
1533                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1534                                                 /* Add to address book - Match */
1535                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1536
1537                                                 g_free(fromaddress);
1538                                                 g_free(fromname);
1539                                         } else {
1540                                                 PrefsAccount *account = NULL;
1541                                                 FolderItem   *folder_item;
1542
1543                                                 if (textview->messageview && textview->messageview->mainwin
1544                                                 &&  textview->messageview->mainwin->summaryview
1545                                                 &&  textview->messageview->mainwin->summaryview->folder_item) {
1546                                                         folder_item = textview->messageview->mainwin->summaryview->folder_item;
1547                                                         if (folder_item->prefs && folder_item->prefs->enable_default_account)
1548                                                                 account = account_find_from_id(folder_item->prefs->default_account);
1549                                                 }
1550                                                 compose_new_with_recipient
1551                                                         (account, uri->uri + 7);
1552                                         }
1553                                 } else {
1554                                         open_uri(uri->uri,
1555                                                  prefs_common.uri_cmd);
1556                                 }
1557                         }
1558                 }
1559         }
1560         if (event)
1561                 textview->last_buttonpress = event->type;
1562         return FALSE;
1563 }
1564
1565 static void textview_uri_list_remove_all(GSList *uri_list)
1566 {
1567         GSList *cur;
1568
1569         for (cur = uri_list; cur != NULL; cur = cur->next) {
1570                 if (cur->data) {
1571                         g_free(((RemoteURI *)cur->data)->uri);
1572                         g_free(cur->data);
1573                 }
1574         }
1575
1576         g_slist_free(uri_list);
1577 }