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 *text_sb_font;
 103 static GdkFont *text_mb_font;
 104 static gint text_sb_font_orig_ascent;
 105 static gint text_sb_font_orig_descent;
 106 static gint text_mb_font_orig_ascent;
 107 static gint text_mb_font_orig_descent;
 108 static GdkFont *spacingfont;
 109
 110 static void textview_show_ertf          (TextView       *textview,
 111                                          FILE           *fp,
 112                                          CodeConverter  *conv);
 113 static void textview_show_html          (TextView       *textview,
 114                                          FILE           *fp,
 115                                          CodeConverter  *conv);
 116 static void textview_write_line         (TextView       *textview,
 117                                          const gchar    *str,
 118                                          CodeConverter  *conv);
 119 static void textview_write_link         (TextView       *textview,
 120                                          const gchar    *url,
 121                                          const gchar    *str,
 122                                          CodeConverter  *conv);
 123 static GPtrArray *textview_scan_header  (TextView       *textview,
 124                                          FILE           *fp);
 125 static void textview_show_header        (TextView       *textview,
 126                                          GPtrArray      *headers);
 127
 128 static gint textview_key_pressed        (GtkWidget      *widget,
 129                                          GdkEventKey    *event,
 130                                          TextView       *textview);
 131 static gint textview_button_pressed     (GtkWidget      *widget,
 132                                          GdkEventButton *event,
 133                                          TextView       *textview);
 134 static gint textview_button_released    (GtkWidget      *widget,
 135                                          GdkEventButton *event,
 136                                          TextView       *textview);
 137
 138 static void textview_uri_list_remove_all(GSList         *uri_list);
 139
 140 static void textview_smooth_scroll_do           (TextView       *textview,
 141                                                  gfloat          old_value,
 142                                                  gfloat          last_value,
 143                                                  gint            step);
 144 static void textview_smooth_scroll_one_line     (TextView       *textview,
 145                                                  gboolean        up);
 146 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 147                                                  gboolean        up);
 148
 149
 150 TextView *textview_create(void)
 151 {
 152         TextView *textview;
 153         GtkWidget *vbox;
 154         GtkWidget *scrolledwin_sb;
 155         GtkWidget *scrolledwin_mb;
 156         GtkWidget *text_sb;
 157         GtkWidget *text_mb;
 158
 159         debug_print(_("Creating text view...\n"));
 160         textview = g_new0(TextView, 1);
 161
 162         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 163         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 164         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 165                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 166         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 167                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 168         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 169         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 170
 171         /* create GtkSText widgets for single-byte and multi-byte character */
 172         text_sb = gtk_stext_new(NULL, NULL);
 173         text_mb = gtk_stext_new(NULL, NULL);
 174         GTK_STEXT(text_sb)->default_tab_width = 8;
 175         GTK_STEXT(text_mb)->default_tab_width = 8;
 176         gtk_widget_show(text_sb);
 177         gtk_widget_show(text_mb);
 178         gtk_stext_set_word_wrap(GTK_STEXT(text_sb), TRUE);
 179         gtk_stext_set_word_wrap(GTK_STEXT(text_mb), TRUE);
 180         gtk_widget_ensure_style(text_sb);
 181         gtk_widget_ensure_style(text_mb);
 182         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 183                 GtkStyle *style;
 184                 GdkFont *font;
 185
 186                 FONT_LOAD(font, prefs_common.normalfont);
 187                 if (font) {
 188                         style = gtk_style_copy(text_sb->style);
 189                         gdk_font_unref(style->font);
 190                         style->font = font;
 191                         gtk_widget_set_style(text_sb, style);
 192                 }
 193         }
 194         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 195                 GtkStyle *style;
 196                 GdkFont *font;
 197
 198                 font = gdk_fontset_load(prefs_common.normalfont);
 199                 if (font) {
 200                         style = gtk_style_copy(text_mb->style);
 201                         gdk_font_unref(style->font);
 202                         style->font = font;
 203                         gtk_widget_set_style(text_mb, style);
 204                 }
 205         }
 206         gtk_widget_ref(scrolledwin_sb);
 207         gtk_widget_ref(scrolledwin_mb);
 208
 209         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 210         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 211         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 212                            GTK_SIGNAL_FUNC(textview_key_pressed),
 213                            textview);
 214         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 215                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 216                                  textview);
 217         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 218                                  GTK_SIGNAL_FUNC(textview_button_released),
 219                                  textview);
 220         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 221                            GTK_SIGNAL_FUNC(textview_key_pressed),
 222                            textview);
 223         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 224                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 225                                  textview);
 226         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 227                                  GTK_SIGNAL_FUNC(textview_button_released),
 228                                  textview);
 229
 230         gtk_widget_show(scrolledwin_sb);
 231         gtk_widget_show(scrolledwin_mb);
 232
 233         vbox = gtk_vbox_new(FALSE, 0);
 234         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 235
 236         gtk_widget_show(vbox);
 237
 238         textview->vbox             = vbox;
 239         textview->scrolledwin      = scrolledwin_sb;
 240         textview->scrolledwin_sb   = scrolledwin_sb;
 241         textview->scrolledwin_mb   = scrolledwin_mb;
 242         textview->text             = text_sb;
 243         textview->text_sb          = text_sb;
 244         textview->text_mb          = text_mb;
 245         textview->text_is_mb       = FALSE;
 246         textview->uri_list         = NULL;
 247         textview->body_pos         = 0;
 248         textview->cur_pos          = 0;
 249         textview->show_all_headers = FALSE;
 250         textview->last_buttonpress = GDK_NOTHING;
 251
 252         return textview;
 253 }
 254
 255 void textview_init(TextView *textview)
 256 {
 257         gtkut_widget_disable_theme_engine(textview->text_sb);
 258         gtkut_widget_disable_theme_engine(textview->text_mb);
 259         textview_update_message_colors();
 260         textview_set_all_headers(textview, FALSE);
 261         textview_set_font(textview, NULL);
 262 }
 263
 264 void textview_update_message_colors(void)
 265 {
 266         GdkColor black = {0, 0, 0, 0};
 267
 268         if (prefs_common.enable_color) {
 269                 /* grab the quote colors, converting from an int to a GdkColor */
 270                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 271                                                &quote_colors[0]);
 272                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 273                                                &quote_colors[1]);
 274                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 275                                                &quote_colors[2]);
 276                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 277                                                &uri_color);
 278         } else {
 279                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 280                         uri_color = emphasis_color = black;
 281         }
 282 }
 283
 284 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 285                            const gchar *file)
 286 {
 287         FILE *fp;
 288
 289         if ((fp = fopen(file, "r")) == NULL) {
 290                 FILE_OP_ERROR(file, "fopen");
 291                 return;
 292         }
 293
 294         textview_show_part(textview, mimeinfo, fp);
 295
 296         fclose(fp);
 297 }
 298
 299 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 300 {
 301         GtkSText *text;
 302         gchar buf[BUFFSIZE];
 303         const gchar *boundary = NULL;
 304         gint boundary_len = 0;
 305         const gchar *charset = NULL;
 306         FILE *tmpfp;
 307         GPtrArray *headers = NULL;
 308         CodeConverter *conv;
 309
 310         g_return_if_fail(mimeinfo != NULL);
 311         g_return_if_fail(fp != NULL);
 312
 313         if (mimeinfo->mime_type == MIME_MULTIPART) {
 314                 if (mimeinfo->sub) {
 315                         mimeinfo = mimeinfo->sub;
 316                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 317                                 perror("fseek");
 318                                 return;
 319                         }
 320                 } else
 321                         return;
 322         }
 323         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 324                 boundary = mimeinfo->parent->boundary;
 325                 boundary_len = strlen(boundary);
 326         }
 327
 328         if (!boundary && (mimeinfo->mime_type == MIME_TEXT || mimeinfo->mime_type == MIME_TEXT_HTML || mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 329
 330                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 331                         perror("fseek");
 332                 headers = textview_scan_header(textview, fp);
 333         } else {
 334                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 335                         glong fpos;
 336                         MimeInfo *parent = mimeinfo->parent;
 337
 338                         while (parent->parent) {
 339                                 if (parent->main &&
 340                                     parent->main->mime_type ==
 341                                         MIME_MESSAGE_RFC822)
 342                                         break;
 343                                 parent = parent->parent;
 344                         }
 345
 346                         if ((fpos = ftell(fp)) < 0)
 347                                 perror("ftell");
 348                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 349                                 perror("fseek");
 350                         else {
 351                                 headers = textview_scan_header(textview, fp);
 352                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 353                                         perror("fseek");
 354                         }
 355                 }
 356                 /* skip MIME part headers */
 357                 while (fgets(buf, sizeof(buf), fp) != NULL)
 358                         if (buf[0] == '\r' || buf[0] == '\n') break;
 359         }
 360
 361         /* display attached RFC822 single text message */
 362         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 363                 if (headers) procheader_header_array_destroy(headers);
 364                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 365                 headers = textview_scan_header(textview, fp);
 366                 mimeinfo = mimeinfo->sub;
 367         } else if (!mimeinfo->parent &&
 368                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 369                 if (headers) procheader_header_array_destroy(headers);
 370                 if (!mimeinfo->sub) return;
 371                 headers = textview_scan_header(textview, fp);
 372                 mimeinfo = mimeinfo->sub;
 373         }
 374
 375         if (prefs_common.force_charset)
 376                 charset = prefs_common.force_charset;
 377         else if (mimeinfo->charset)
 378                 charset = mimeinfo->charset;
 379         textview_set_font(textview, charset);
 380
 381         conv = conv_code_converter_new(charset);
 382
 383         textview_clear(textview);
 384         text = GTK_STEXT(textview->text);
 385         gtk_stext_freeze(text);
 386
 387         textview->body_pos = 0;
 388         textview->cur_pos  = 0;
 389
 390         if (headers) {
 391                 textview_show_header(textview, headers);
 392                 procheader_header_array_destroy(headers);
 393         }
 394
 395 /* #if 0 */
 396         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 397
 398         if (tmpfp) {
 399                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 400                         textview_show_html(textview, tmpfp, conv);
 401                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 402                         textview_show_ertf(textview, tmpfp, conv);
 403                 else
 404                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 405                                 textview_write_line(textview, buf, conv);
 406                 fclose(tmpfp);
 407         }
 408 /* #else
 409         tmpfp = procmime_get_text_content(mimeinfo, fp);
 410
 411         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 412                 textview_write_line(textview, buf, conv);
 413
 414         fclose(tmpfp);
 415 #endif */
 416
 417         conv_code_converter_destroy(conv);
 418
 419         gtk_stext_thaw(text);
 420 }
 421
 422 #define TEXT_INSERT(str) \
 423         gtk_stext_insert(text, textview->msgfont, NULL, NULL, str, -1)
 424
 425 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 426 {
 427         GtkSText *text;
 428
 429         if (!partinfo) return;
 430
 431         textview_set_font(textview, NULL);
 432         text = GTK_STEXT(textview->text);
 433         textview_clear(textview);
 434
 435         gtk_stext_freeze(text);
 436
 437         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 438         TEXT_INSERT(_("right click and select `Save as...', "));
 439         TEXT_INSERT(_("or press `y' key.\n\n"));
 440
 441         TEXT_INSERT(_("To display this part as a text message, select "));
 442         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 443
 444         TEXT_INSERT(_("To open this part with external program, select "));
 445         TEXT_INSERT(_("`Open' or `Open with...', "));
 446         TEXT_INSERT(_("or double-click, or click the center button, "));
 447         TEXT_INSERT(_("or press `l' key."));
 448
 449         gtk_stext_thaw(text);
 450 }
 451
 452 #if USE_GPGME
 453 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 454 {
 455         GtkSText *text;
 456
 457         if (!partinfo) return;
 458
 459         textview_set_font(textview, NULL);
 460         text = GTK_STEXT(textview->text);
 461         textview_clear(textview);
 462
 463         gtk_stext_freeze(text);
 464
 465         if (partinfo->sigstatus_full == NULL) {
 466                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 467                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 468                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 469         } else {
 470                 TEXT_INSERT(partinfo->sigstatus_full);
 471         }
 472
 473         gtk_stext_thaw(text);
 474 }
 475 #endif /* USE_GPGME */
 476
 477 #undef TEXT_INSERT
 478
 479 static void textview_show_html(TextView *textview, FILE *fp,
 480                                CodeConverter *conv)
 481 {
 482         HTMLParser *parser;
 483         gchar *str;
 484         gchar* url = NULL;
 485
 486         parser = html_parser_new(fp, conv);
 487         g_return_if_fail(parser != NULL);
 488
 489         while ((str = html_parse(parser)) != NULL) {
 490                 if (parser->state == HTML_HREF) {
 491                         /* first time : get and copy the URL */
 492                         if (url == NULL) {
 493                                 /* ALF - the sylpheed html parser returns an empty string,
 494                                  * if still inside an <a>, but already parsed past HREF */
 495                                 str = strtok(str, " ");
 496                                 if (str) {
 497                                         url = strdup(str);
 498                                         /* the URL may (or not) be followed by the
 499                                          * referenced text */
 500                                         str = strtok(NULL, "");
 501                                 }
 502                         }
 503                         if (str != NULL) {
 504                                 textview_write_link(textview, url, str, NULL);
 505                         }
 506                 } else {
 507                         if (url != NULL) {
 508                                 free(url);
 509                                 url = NULL;
 510                         }
 511                         textview_write_line(textview, str, NULL);
 512                 }
 513         }
 514         html_parser_destroy(parser);
 515 }
 516
 517 static void textview_show_ertf(TextView *textview, FILE *fp,
 518                                CodeConverter *conv)
 519 {
 520         ERTFParser *parser;
 521         gchar *str;
 522         gchar* url = NULL;
 523
 524         parser = ertf_parser_new(fp, conv);
 525         g_return_if_fail(parser != NULL);
 526
 527         while ((str = ertf_parse(parser)) != NULL) {
 528                 textview_write_line(textview, str, NULL);
 529         }
 530         ertf_parser_destroy(parser);
 531 }
 532
 533 /* get_uri_part() - retrieves a URI starting from scanpos.
 534                     Returns TRUE if succesful */
 535 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 536                              const gchar **bp, const gchar **ep)
 537 {
 538         const gchar *ep_;
 539
 540         g_return_val_if_fail(start != NULL, FALSE);
 541         g_return_val_if_fail(scanpos != NULL, FALSE);
 542         g_return_val_if_fail(bp != NULL, FALSE);
 543         g_return_val_if_fail(ep != NULL, FALSE);
 544
 545         *bp = scanpos;
 546
 547         /* find end point of URI */
 548         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 549                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 550                         break;
 551         }
 552
 553         /* no punctuation at end of string */
 554
 555         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 556          * should pass some URI type to this function and decide on that whether
 557          * to perform punctuation stripping */
 558
 559 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 560
 561         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 562                 ;
 563
 564 #undef IS_REAL_PUNCT
 565
 566         *ep = ep_;
 567
 568         return TRUE;
 569 }
 570
 571 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 572 {
 573         return g_strndup(bp, ep - bp);
 574 }
 575
 576 /* valid mail address characters */
 577 #define IS_RFC822_CHAR(ch) \
 578         (isascii(ch) && \
 579          (ch) > 32   && \
 580          (ch) != 127 && \
 581          !isspace(ch) && \
 582          !strchr("()<>\"", (ch)))
 583
 584 /* alphabet and number within 7bit ASCII */
 585 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 586 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 587
 588 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 589 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 590                                const gchar **bp, const gchar **ep)
 591 {
 592         /* more complex than the uri part because we need to scan back and forward starting from
 593          * the scan position. */
 594         gboolean result = FALSE;
 595         const gchar *bp_ = NULL;
 596         const gchar *ep_ = NULL;
 597
 598         /* the informative part of the email address (describing the name
 599          * of the email address owner) may contain quoted parts. the
 600          * closure stack stores the last encountered quotes. */
 601         gchar closure_stack[128];
 602         gchar *ptr = closure_stack;
 603
 604         g_return_val_if_fail(start != NULL, FALSE);
 605         g_return_val_if_fail(scanpos != NULL, FALSE);
 606         g_return_val_if_fail(bp != NULL, FALSE);
 607         g_return_val_if_fail(ep != NULL, FALSE);
 608
 609         /* scan start of address */
 610         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 611                 ;
 612
 613         /* TODO: should start with an alnum? */
 614         bp_++;
 615         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 616                 ;
 617
 618         if (bp_ != scanpos) {
 619                 /* scan end of address */
 620                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 621                         ;
 622
 623                 /* TODO: really should terminate with an alnum? */
 624                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 625                         ;
 626                 ep_++;
 627
 628                 if (ep_ > scanpos + 1) {
 629                         *ep = ep_;
 630                         *bp = bp_;
 631                         result = TRUE;
 632                 }
 633         }
 634
 635         if (!result) return FALSE;
 636
 637         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 638         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 639                 return FALSE;
 640
 641         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 642         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 643                 return TRUE;
 644
 645 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 646 #define IN_STACK()      (ptr > closure_stack)
 647 /* has underrun check */
 648 #define POP_STACK()     if(IN_STACK()) --ptr
 649 /* has overrun check */
 650 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 651 /* has underrun check */
 652 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 653
 654         ep_++;
 655
 656         /* scan for the informative part. */
 657         for (bp_ -= 2; bp_ >= start; bp_--) {
 658                 /* if closure on the stack keep scanning */
 659                 if (PEEK_STACK() == *bp_) {
 660                         POP_STACK();
 661                         continue;
 662                 }
 663                 if (*bp_ == '\'' || *bp_ == '"') {
 664                         PUSH_STACK(*bp_);
 665                         continue;
 666                 }
 667
 668                 /* if nothing in the closure stack, do the special conditions
 669                  * the following if..else expression simply checks whether
 670                  * a token is acceptable. if not acceptable, the clause
 671                  * should terminate the loop with a 'break' */
 672                 if (!PEEK_STACK()) {
 673                         if (*bp_ == '-'
 674                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 675                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 676                                 /* hyphens are allowed, but only in
 677                                    between alnums */
 678                         } else if (!ispunct(*bp_)) {
 679                                 /* but anything not being a punctiation
 680                                    is ok */
 681                         } else {
 682                                 break; /* anything else is rejected */
 683                         }
 684                 }
 685         }
 686
 687         bp_++;
 688
 689 #undef PEEK_STACK
 690 #undef PUSH_STACK
 691 #undef POP_STACK
 692 #undef IN_STACK
 693 #undef FULL_STACK
 694
 695         /* scan forward (should start with an alnum) */
 696         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 697                 ;
 698
 699         *ep = ep_;
 700         *bp = bp_;
 701
 702         return result;
 703 }
 704
 705 #undef IS_QUOTE
 706 #undef IS_RFC822_CHAR
 707
 708 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 709 {
 710         /* returns a mailto: URI; mailto: is also used to detect the
 711          * uri type later on in the button_pressed signal handler */
 712         gchar *tmp;
 713         gchar *result;
 714
 715         tmp = g_strndup(bp, ep - bp);
 716         result = g_strconcat("mailto:", tmp, NULL);
 717         g_free(tmp);
 718
 719         return result;
 720 }
 721
 722 #define ADD_TXT_POS(bp_, ep_, pti_) \
 723         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 724                 last = last->next; \
 725                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 726                 last->next = NULL; \
 727         } else { \
 728                 g_warning("alloc error scanning URIs\n"); \
 729                 gtk_stext_insert(text, textview->msgfont, fg_color, NULL, \
 730                                 linebuf, -1); \
 731                 return; \
 732         }
 733
 734 /* textview_make_clickable_parts() - colorizes clickable parts */
 735 static void textview_make_clickable_parts(TextView *textview,
 736                                           GdkFont *font,
 737                                           GdkColor *fg_color,
 738                                           GdkColor *uri_color,
 739                                           const gchar *linebuf)
 740 {
 741         /* parse table - in order of priority */
 742         struct table {
 743                 const gchar *needle; /* token */
 744
 745                 /* token search function */
 746                 gchar    *(*search)     (const gchar *haystack,
 747                                          const gchar *needle);
 748                 /* part parsing function */
 749                 gboolean  (*parse)      (const gchar *start,
 750                                          const gchar *scanpos,
 751                                          const gchar **bp_,
 752                                          const gchar **ep_);
 753                 /* part to URI function */
 754                 gchar    *(*build_uri)  (const gchar *bp,
 755                                          const gchar *ep);
 756         };
 757
 758         static struct table parser[] = {
 759                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 760                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 761                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 762                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 763                 {"@",        strcasestr, get_email_part, make_email_string}
 764         };
 765         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 766
 767         gint  n;
 768         const gchar *walk, *bp, *ep;
 769
 770         struct txtpos {
 771                 const gchar     *bp, *ep;       /* text position */
 772                 gint             pti;           /* index in parse table */
 773                 struct txtpos   *next;          /* next */
 774         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 775
 776         GtkSText *text = GTK_STEXT(textview->text);
 777
 778         /* parse for clickable parts, and build a list of begin and end positions  */
 779         for (walk = linebuf, n = 0;;) {
 780                 gint last_index = PARSE_ELEMS;
 781                 gchar *scanpos = NULL;
 782
 783                 /* FIXME: this looks phony. scanning for anything in the parse table */
 784                 for (n = 0; n < PARSE_ELEMS; n++) {
 785                         gchar *tmp;
 786
 787                         tmp = parser[n].search(walk, parser[n].needle);
 788                         if (tmp) {
 789                                 if (scanpos == NULL || tmp < scanpos) {
 790                                         scanpos = tmp;
 791                                         last_index = n;
 792                                 }
 793                         }
 794                 }
 795
 796                 if (scanpos) {
 797                         /* check if URI can be parsed */
 798                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 799                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 800                                         ADD_TXT_POS(bp, ep, last_index);
 801                                         walk = ep;
 802                         } else
 803                                 walk = scanpos +
 804                                         strlen(parser[last_index].needle);
 805                 } else
 806                         break;
 807         }
 808
 809         /* colorize this line */
 810         if (head.next) {
 811                 const gchar *normal_text = linebuf;
 812
 813                 /* insert URIs */
 814                 for (last = head.next; last != NULL;
 815                      normal_text = last->ep, last = last->next) {
 816                         RemoteURI *uri;
 817
 818                         uri = g_new(RemoteURI, 1);
 819                         if (last->bp - normal_text > 0)
 820                                 gtk_stext_insert(text, font,
 821                                                 fg_color, NULL,
 822                                                 normal_text,
 823                                                 last->bp - normal_text);
 824                         uri->uri = parser[last->pti].build_uri(last->bp,
 825                                                                last->ep);
 826                         uri->start = gtk_stext_get_point(text);
 827                         gtk_stext_insert(text, font, uri_color,
 828                                         NULL, last->bp, last->ep - last->bp);
 829                         uri->end = gtk_stext_get_point(text);
 830                         textview->uri_list =
 831                                 g_slist_append(textview->uri_list, uri);
 832                 }
 833
 834                 if (*normal_text)
 835                         gtk_stext_insert(text, font, fg_color,
 836                                         NULL, normal_text, -1);
 837         } else
 838                 gtk_stext_insert(text, font, fg_color, NULL, linebuf, -1);
 839 }
 840
 841 #undef ADD_TXT_POS
 842
 843 /* This function writes str as a double-clickable link with the given url. */
 844 static void textview_write_link(TextView *textview, const gchar *url,
 845                                 const gchar *str, CodeConverter *conv)
 846 {
 847     GdkColor *link_color = NULL;
 848     RemoteURI* uri;
 849     GtkSText *text = GTK_STEXT(textview->text);
 850     gchar buf[BUFFSIZE];
 851
 852     /* this part is taken from textview_write_line. Right now the only place
 853      * that calls this function passes NULL for conv, but you never know. */
 854     if (!conv)
 855             strncpy2(buf, str, sizeof(buf));
 856     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 857             gtk_stext_insert(text, textview->msgfont,
 858                             prefs_common.enable_color
 859                             ? &error_color : NULL, NULL,
 860                             "*** Warning: code conversion failed ***\n",
 861                             -1);
 862             return;
 863     }
 864
 865     /* this part is based on the code in make_clickable_parts */
 866     if (prefs_common.enable_color) {
 867         link_color = &uri_color;
 868     }
 869     uri = g_new(RemoteURI, 1);
 870     uri->uri = g_strdup(url);
 871     uri->start = gtk_stext_get_point(text);
 872     gtk_stext_insert(text, textview->msgfont, link_color, NULL, buf,
 873                     strlen(buf));
 874     uri->end = gtk_stext_get_point(text);
 875     textview->uri_list = g_slist_append(textview->uri_list, uri);
 876 }
 877
 878 static void textview_write_line(TextView *textview, const gchar *str,
 879                                 CodeConverter *conv)
 880 {
 881         GtkSText *text = GTK_STEXT(textview->text);
 882         gchar buf[BUFFSIZE];
 883         GdkColor *fg_color;
 884         gint quotelevel = -1;
 885
 886         if (!conv)
 887                 strncpy2(buf, str, sizeof(buf));
 888         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 889                 gtk_stext_insert(text, textview->msgfont,
 890                                 prefs_common.enable_color
 891                                 ? &error_color : NULL, NULL,
 892                                 "*** Warning: code conversion failed ***\n",
 893                                 -1);
 894                 return;
 895         }
 896
 897         strcrchomp(buf);
 898         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 899         fg_color = NULL;
 900
 901         /* change color of quotation
 902            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 903            Up to 3 levels of quotations are detected, and each
 904            level is colored using a different color. */
 905         if (prefs_common.enable_color && strchr(buf, '>')) {
 906                 quotelevel = get_quote_level(buf);
 907
 908                 /* set up the correct foreground color */
 909                 if (quotelevel > 2) {
 910                         /* recycle colors */
 911                         if (prefs_common.recycle_quote_colors)
 912                                 quotelevel %= 3;
 913                         else
 914                                 quotelevel = 2;
 915                 }
 916         }
 917
 918         if (quotelevel == -1)
 919                 fg_color = NULL;
 920         else
 921                 fg_color = &quote_colors[quotelevel];
 922
 923         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 924                 gtk_stext_insert(text, spacingfont, NULL, NULL, " ", 1);
 925
 926         if (prefs_common.enable_color)
 927                 textview_make_clickable_parts(textview, textview->msgfont,
 928                                               fg_color, &uri_color, buf);
 929         else
 930                 textview_make_clickable_parts(textview, textview->msgfont,
 931                                               fg_color, NULL, buf);
 932 }
 933
 934 void textview_clear(TextView *textview)
 935 {
 936         GtkSText *text = GTK_STEXT(textview->text);
 937
 938         gtk_stext_freeze(text);
 939         gtk_stext_set_point(text, 0);
 940         gtk_stext_forward_delete(text, gtk_stext_get_length(text));
 941         gtk_stext_thaw(text);
 942
 943         textview_uri_list_remove_all(textview->uri_list);
 944         textview->uri_list = NULL;
 945 }
 946
 947 void textview_destroy(TextView *textview)
 948 {
 949         textview_uri_list_remove_all(textview->uri_list);
 950         textview->uri_list = NULL;
 951
 952         if (!textview->scrolledwin_sb->parent)
 953                 gtk_widget_destroy(textview->scrolledwin_sb);
 954         if (!textview->scrolledwin_mb->parent)
 955                 gtk_widget_destroy(textview->scrolledwin_mb);
 956
 957         if (textview->msgfont)
 958                 gdk_font_unref(textview->msgfont);
 959         if (textview->boldfont)
 960                 gdk_font_unref(textview->boldfont);
 961
 962         g_free(textview);
 963 }
 964
 965 void textview_set_all_headers(TextView *textview, gboolean all_headers)
 966 {
 967         textview->show_all_headers = all_headers;
 968 }
 969
 970 void textview_set_font(TextView *textview, const gchar *codeset)
 971 {
 972         gboolean use_fontset = TRUE;
 973
 974         /* In multi-byte mode, GtkSText can't display 8bit characters
 975            correctly, so it must be single-byte mode. */
 976         if (MB_CUR_MAX > 1) {
 977                 if (codeset) {
 978                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 979                             !g_strcasecmp(codeset, "BALTIC"))
 980                                 use_fontset = FALSE;
 981                         else if (conv_get_current_charset() != C_EUC_JP &&
 982                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
 983                                   !g_strncasecmp(codeset, "CP", 2)    ||
 984                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
 985                                 use_fontset = FALSE;
 986                 }
 987         } else
 988                 use_fontset = FALSE;
 989
 990         if (textview->text_is_mb && !use_fontset) {
 991                 GtkWidget *parent;
 992
 993                 parent = textview->scrolledwin_mb->parent;
 994                 gtkut_container_remove(GTK_CONTAINER(parent),
 995                                        textview->scrolledwin_mb);
 996                 gtk_container_add(GTK_CONTAINER(parent),
 997                                   textview->scrolledwin_sb);
 998
 999                 textview->text = textview->text_sb;
1000                 textview->text_is_mb = FALSE;
1001         } else if (!textview->text_is_mb && use_fontset) {
1002                 GtkWidget *parent;
1003
1004                 parent = textview->scrolledwin_sb->parent;
1005                 gtkut_container_remove(GTK_CONTAINER(parent),
1006                                        textview->scrolledwin_sb);
1007                 gtk_container_add(GTK_CONTAINER(parent),
1008                                   textview->scrolledwin_mb);
1009
1010                 textview->text = textview->text_mb;
1011                 textview->text_is_mb = TRUE;
1012         }
1013
1014         if (prefs_common.textfont) {
1015                 GdkFont *font;
1016
1017                 if (use_fontset) {
1018                         if (text_mb_font) {
1019                                 text_mb_font->ascent = text_mb_font_orig_ascent;
1020                                 text_mb_font->descent = text_mb_font_orig_descent;
1021                         }
1022                         font = gdk_fontset_load(prefs_common.textfont);
1023                         if (font && text_mb_font != font) {
1024                                 if (text_mb_font)
1025                                         gdk_font_unref(text_mb_font);
1026                                 text_mb_font = font;
1027                                 text_mb_font_orig_ascent = font->ascent;
1028                                 text_mb_font_orig_descent = font->descent;
1029                         }
1030                 } else {
1031                         if (text_sb_font) {
1032                                 text_sb_font->ascent = text_sb_font_orig_ascent;
1033                                 text_sb_font->descent = text_sb_font_orig_descent;
1034                         }
1035                         if (MB_CUR_MAX > 1) {
1036                                 FONT_LOAD(font, "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
1037                         } else {
1038                                 FONT_LOAD(font, prefs_common.textfont);
1039                         }
1040                         if (font && text_sb_font != font) {
1041                                 if (text_sb_font)
1042                                         gdk_font_unref(text_sb_font);
1043                                 text_sb_font = font;
1044                                 text_sb_font_orig_ascent = font->ascent;
1045                                 text_sb_font_orig_descent = font->descent;
1046                         }
1047                 }
1048
1049                 if (font) {
1050                         gint ascent, descent;
1051
1052                         descent = prefs_common.line_space / 2;
1053                         ascent  = prefs_common.line_space - descent;
1054                         font->ascent  += ascent;
1055                         font->descent += descent;
1056
1057                         if (textview->msgfont)
1058                                 gdk_font_unref(textview->msgfont);
1059                         textview->msgfont = font;
1060                         gdk_font_ref(font);
1061                 }
1062         }
1063
1064         if (!textview->boldfont && prefs_common.boldfont)
1065                 FONT_LOAD(textview->boldfont, prefs_common.boldfont);
1066         if (!spacingfont)
1067                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1068 }
1069
1070 enum
1071 {
1072         H_DATE          = 0,
1073         H_FROM          = 1,
1074         H_TO            = 2,
1075         H_NEWSGROUPS    = 3,
1076         H_SUBJECT       = 4,
1077         H_CC            = 5,
1078         H_REPLY_TO      = 6,
1079         H_FOLLOWUP_TO   = 7,
1080         H_X_MAILER      = 8,
1081         H_X_NEWSREADER  = 9,
1082         H_USER_AGENT    = 10,
1083         H_ORGANIZATION  = 11,
1084 };
1085
1086 void textview_set_position(TextView *textview, gint pos)
1087 {
1088         if (pos < 0) {
1089                 textview->cur_pos =
1090                         gtk_stext_get_length(GTK_STEXT(textview->text));
1091         } else {
1092                 textview->cur_pos = pos;
1093         }
1094 }
1095
1096 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1097 {
1098         gchar buf[BUFFSIZE];
1099         GPtrArray *headers, *sorted_headers;
1100         GSList *disphdr_list;
1101         Header *header;
1102         gint i;
1103
1104         g_return_val_if_fail(fp != NULL, NULL);
1105
1106         if (textview->show_all_headers)
1107                 return procheader_get_header_array_asis(fp);
1108
1109         if (!prefs_common.display_header) {
1110                 while (fgets(buf, sizeof(buf), fp) != NULL)
1111                         if (buf[0] == '\r' || buf[0] == '\n') break;
1112                 return NULL;
1113         }
1114
1115         headers = procheader_get_header_array_asis(fp);
1116
1117         sorted_headers = g_ptr_array_new();
1118
1119         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1120              disphdr_list = disphdr_list->next) {
1121                 DisplayHeaderProp *dp =
1122                         (DisplayHeaderProp *)disphdr_list->data;
1123
1124                 for (i = 0; i < headers->len; i++) {
1125                         header = g_ptr_array_index(headers, i);
1126
1127                         if (procheader_headername_equal(header->name,
1128                                                         dp->name)) {
1129                                 if (dp->hidden)
1130                                         procheader_header_free(header);
1131                                 else
1132                                         g_ptr_array_add(sorted_headers, header);
1133
1134                                 g_ptr_array_remove_index(headers, i);
1135                                 i--;
1136                         }
1137                 }
1138         }
1139
1140         if (prefs_common.show_other_header) {
1141                 for (i = 0; i < headers->len; i++) {
1142                         header = g_ptr_array_index(headers, i);
1143                         g_ptr_array_add(sorted_headers, header);
1144                 }
1145         }
1146
1147         g_ptr_array_free(headers, FALSE);
1148
1149         return sorted_headers;
1150 }
1151
1152 static void textview_show_header(TextView *textview, GPtrArray *headers)
1153 {
1154         GtkSText *text = GTK_STEXT(textview->text);
1155         Header *header;
1156         gint i;
1157
1158         g_return_if_fail(headers != NULL);
1159
1160         gtk_stext_freeze(text);
1161
1162         for (i = 0; i < headers->len; i++) {
1163                 header = g_ptr_array_index(headers, i);
1164                 g_return_if_fail(header->name != NULL);
1165
1166                 gtk_stext_insert(text, textview->boldfont, NULL, NULL,
1167                                 header->name, -1);
1168                 if (header->name[strlen(header->name) - 1] != ' ')
1169                         gtk_stext_insert(text, textview->boldfont,
1170                                         NULL, NULL, " ", 1);
1171
1172                 if (procheader_headername_equal(header->name, "Subject") ||
1173                     procheader_headername_equal(header->name, "From")    ||
1174                     procheader_headername_equal(header->name, "To")      ||
1175                     procheader_headername_equal(header->name, "Cc"))
1176                         unfold_line(header->body);
1177
1178                 if (prefs_common.enable_color &&
1179                     (procheader_headername_equal(header->name, "X-Mailer") ||
1180                      procheader_headername_equal(header->name,
1181                                                  "X-Newsreader")) &&
1182                     strstr(header->body, "Sylpheed") != NULL)
1183                         gtk_stext_insert(text, NULL, &emphasis_color, NULL,
1184                                         header->body, -1);
1185                 else if (prefs_common.enable_color) {
1186                         textview_make_clickable_parts(textview,
1187                                                       NULL, NULL, &uri_color,
1188                                                       header->body);
1189                 } else {
1190                         textview_make_clickable_parts(textview,
1191                                                       NULL, NULL, NULL,
1192                                                       header->body);
1193                 }
1194                 gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1195         }
1196
1197         gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1198         gtk_stext_thaw(text);
1199         textview->body_pos = gtk_stext_get_length(text);
1200 }
1201
1202 gboolean textview_search_string(TextView *textview, const gchar *str,
1203                                 gboolean case_sens)
1204 {
1205         GtkSText *text = GTK_STEXT(textview->text);
1206         gint pos;
1207         wchar_t *wcs;
1208         gint len;
1209         gint text_len;
1210         gboolean found = FALSE;
1211
1212         g_return_val_if_fail(str != NULL, FALSE);
1213
1214         wcs = strdup_mbstowcs(str);
1215         g_return_val_if_fail(wcs != NULL, FALSE);
1216         len = wcslen(wcs);
1217         pos = textview->cur_pos;
1218         if (pos < textview->body_pos)
1219                 pos = textview->body_pos;
1220         text_len = gtk_stext_get_length(text);
1221         if (text_len - pos < len) {
1222                 g_free(wcs);
1223                 return FALSE;
1224         }
1225
1226         for (; pos < text_len; pos++) {
1227                 if (text_len - pos < len) break;
1228                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1229                     == TRUE) {
1230                         gtk_editable_set_position(GTK_EDITABLE(text),
1231                                                   pos + len);
1232                         gtk_editable_select_region(GTK_EDITABLE(text),
1233                                                    pos, pos + len);
1234                         textview_set_position(textview, pos + len);
1235                         found = TRUE;
1236                         break;
1237                 }
1238                 if (text_len - pos == len) break;
1239         }
1240
1241         g_free(wcs);
1242         return found;
1243 }
1244
1245 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1246                                          gboolean case_sens)
1247 {
1248         GtkSText *text = GTK_STEXT(textview->text);
1249         gint pos;
1250         wchar_t *wcs;
1251         gint len;
1252         gint text_len;
1253         gboolean found = FALSE;
1254
1255         g_return_val_if_fail(str != NULL, FALSE);
1256
1257         wcs = strdup_mbstowcs(str);
1258         g_return_val_if_fail(wcs != NULL, FALSE);
1259         len = wcslen(wcs);
1260         pos = textview->cur_pos;
1261         text_len = gtk_stext_get_length(text);
1262         if (text_len - textview->body_pos < len) {
1263                 g_free(wcs);
1264                 return FALSE;
1265         }
1266         if (pos <= textview->body_pos || text_len - pos < len)
1267                 pos = text_len - len;
1268
1269         for (; pos >= textview->body_pos; pos--) {
1270                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1271                     == TRUE) {
1272                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1273                         gtk_editable_select_region(GTK_EDITABLE(text),
1274                                                    pos, pos + len);
1275                         textview_set_position(textview, pos - 1);
1276                         found = TRUE;
1277                         break;
1278                 }
1279                 if (pos == textview->body_pos) break;
1280         }
1281
1282         g_free(wcs);
1283         return found;
1284 }
1285
1286 void textview_scroll_one_line(TextView *textview, gboolean up)
1287 {
1288         GtkSText *text = GTK_STEXT(textview->text);
1289         gfloat upper;
1290
1291         if (prefs_common.enable_smooth_scroll) {
1292                 textview_smooth_scroll_one_line(textview, up);
1293                 return;
1294         }
1295
1296         if (!up) {
1297                 upper = text->vadj->upper - text->vadj->page_size;
1298                 if (text->vadj->value < upper) {
1299                         text->vadj->value +=
1300                                 text->vadj->step_increment * 4;
1301                         text->vadj->value =
1302                                 MIN(text->vadj->value, upper);
1303                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1304                                                 "value_changed");
1305                 }
1306         } else {
1307                 if (text->vadj->value > 0.0) {
1308                         text->vadj->value -=
1309                                 text->vadj->step_increment * 4;
1310                         text->vadj->value =
1311                                 MAX(text->vadj->value, 0.0);
1312                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1313                                                 "value_changed");
1314                 }
1315         }
1316 }
1317
1318 gboolean textview_scroll_page(TextView *textview, gboolean up)
1319 {
1320         GtkSText *text = GTK_STEXT(textview->text);
1321         gfloat upper;
1322         gfloat page_incr;
1323
1324         if (prefs_common.enable_smooth_scroll)
1325                 return textview_smooth_scroll_page(textview, up);
1326
1327         if (prefs_common.scroll_halfpage)
1328                 page_incr = text->vadj->page_increment / 2;
1329         else
1330                 page_incr = text->vadj->page_increment;
1331
1332         if (!up) {
1333                 upper = text->vadj->upper - text->vadj->page_size;
1334                 if (text->vadj->value < upper) {
1335                         text->vadj->value += page_incr;
1336                         text->vadj->value = MIN(text->vadj->value, upper);
1337                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1338                                                 "value_changed");
1339                 } else
1340                         return FALSE;
1341         } else {
1342                 if (text->vadj->value > 0.0) {
1343                         text->vadj->value -= page_incr;
1344                         text->vadj->value = MAX(text->vadj->value, 0.0);
1345                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1346                                                 "value_changed");
1347                 } else
1348                         return FALSE;
1349         }
1350
1351         return TRUE;
1352 }
1353
1354 static void textview_smooth_scroll_do(TextView *textview,
1355                                       gfloat old_value, gfloat last_value,
1356                                       gint step)
1357 {
1358         GtkSText *text = GTK_STEXT(textview->text);
1359         gint change_value;
1360         gboolean up;
1361         gint i;
1362
1363         if (old_value < last_value) {
1364                 change_value = last_value - old_value;
1365                 up = FALSE;
1366         } else {
1367                 change_value = old_value - last_value;
1368                 up = TRUE;
1369         }
1370
1371         gdk_key_repeat_disable();
1372
1373         for (i = step; i <= change_value; i += step) {
1374                 text->vadj->value = old_value + (up ? -i : i);
1375                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1376                                         "value_changed");
1377         }
1378
1379         text->vadj->value = last_value;
1380         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1381
1382         gdk_key_repeat_restore();
1383 }
1384
1385 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1386 {
1387         GtkSText *text = GTK_STEXT(textview->text);
1388         gfloat upper;
1389         gfloat old_value;
1390         gfloat last_value;
1391
1392         if (!up) {
1393                 upper = text->vadj->upper - text->vadj->page_size;
1394                 if (text->vadj->value < upper) {
1395                         old_value = text->vadj->value;
1396                         last_value = text->vadj->value +
1397                                 text->vadj->step_increment * 4;
1398                         last_value = MIN(last_value, upper);
1399
1400                         textview_smooth_scroll_do(textview, old_value,
1401                                                   last_value,
1402                                                   prefs_common.scroll_step);
1403                 }
1404         } else {
1405                 if (text->vadj->value > 0.0) {
1406                         old_value = text->vadj->value;
1407                         last_value = text->vadj->value -
1408                                 text->vadj->step_increment * 4;
1409                         last_value = MAX(last_value, 0.0);
1410
1411                         textview_smooth_scroll_do(textview, old_value,
1412                                                   last_value,
1413                                                   prefs_common.scroll_step);
1414                 }
1415         }
1416 }
1417
1418 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1419 {
1420         GtkSText *text = GTK_STEXT(textview->text);
1421         gfloat upper;
1422         gfloat page_incr;
1423         gfloat old_value;
1424         gfloat last_value;
1425
1426         if (prefs_common.scroll_halfpage)
1427                 page_incr = text->vadj->page_increment / 2;
1428         else
1429                 page_incr = text->vadj->page_increment;
1430
1431         if (!up) {
1432                 upper = text->vadj->upper - text->vadj->page_size;
1433                 if (text->vadj->value < upper) {
1434                         old_value = text->vadj->value;
1435                         last_value = text->vadj->value + page_incr;
1436                         last_value = MIN(last_value, upper);
1437
1438                         textview_smooth_scroll_do(textview, old_value,
1439                                                   last_value,
1440                                                   prefs_common.scroll_step);
1441                 } else
1442                         return FALSE;
1443         } else {
1444                 if (text->vadj->value > 0.0) {
1445                         old_value = text->vadj->value;
1446                         last_value = text->vadj->value - page_incr;
1447                         last_value = MAX(last_value, 0.0);
1448
1449                         textview_smooth_scroll_do(textview, old_value,
1450                                                   last_value,
1451                                                   prefs_common.scroll_step);
1452                 } else
1453                         return FALSE;
1454         }
1455
1456         return TRUE;
1457 }
1458
1459 #define KEY_PRESS_EVENT_STOP() \
1460         if (gtk_signal_n_emissions_by_name \
1461                 (GTK_OBJECT(widget), "key_press_event") > 0) { \
1462                 gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), \
1463                                              "key_press_event"); \
1464         }
1465
1466 static gint textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1467                                  TextView *textview)
1468 {
1469         SummaryView *summaryview = NULL;
1470         MessageView *messageview = textview->messageview;
1471
1472         if (!event) return FALSE;
1473         if (messageview->mainwin)
1474                 summaryview = messageview->mainwin->summaryview;
1475
1476         switch (event->keyval) {
1477         case GDK_Tab:
1478         case GDK_Home:
1479         case GDK_Left:
1480         case GDK_Up:
1481         case GDK_Right:
1482         case GDK_Down:
1483         case GDK_Page_Up:
1484         case GDK_Page_Down:
1485         case GDK_End:
1486         case GDK_Control_L:
1487         case GDK_Control_R:
1488                 break;
1489         case GDK_space:
1490                 if (summaryview)
1491                         summary_pass_key_press_event(summaryview, event);
1492                 else
1493                         textview_scroll_page(textview, FALSE);
1494                 break;
1495         case GDK_BackSpace:
1496                 textview_scroll_page(textview, TRUE);
1497                 break;
1498         case GDK_Return:
1499                 textview_scroll_one_line(textview,
1500                                          (event->state & GDK_MOD1_MASK) != 0);
1501                 break;
1502         case GDK_n:
1503         case GDK_N:
1504         case GDK_p:
1505         case GDK_P:
1506         case GDK_y:
1507         case GDK_t:
1508         case GDK_l:
1509                 if (messageview->type == MVIEW_MIME) {
1510                         KEY_PRESS_EVENT_STOP();
1511                         mimeview_pass_key_press_event(messageview->mimeview,
1512                                                       event);
1513                         break;
1514                 }
1515                 /* fall through */
1516         default:
1517                 if (summaryview)
1518                         summary_pass_key_press_event(summaryview, event);
1519                 break;
1520         }
1521
1522         return TRUE;
1523 }
1524
1525 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1526                                     TextView *textview)
1527 {
1528         if (event)
1529                 textview->last_buttonpress = event->type;
1530         return FALSE;
1531 }
1532
1533 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1534                                     TextView *textview)
1535 {
1536         textview->cur_pos =
1537                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1538
1539         if (event &&
1540             ((event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS)
1541              || event->button == 2 || event->button == 3)) {
1542                 GSList *cur;
1543
1544                 /* double click seems to set the cursor after the current
1545                  * word. The cursor position needs fixing, otherwise the
1546                  * last word of a clickable zone will not work */
1547                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1548                         textview->cur_pos--;
1549                 }
1550
1551                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1552                         RemoteURI *uri = (RemoteURI *)cur->data;
1553
1554                         if (textview->cur_pos >= uri->start &&
1555                             textview->cur_pos <  uri->end) {
1556                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1557                                         if (event->button == 3) {
1558                                                 gchar *fromname, *fromaddress;
1559                                                 GdkEventButton tmpev;
1560
1561                                                 /* extract url */
1562                                                 fromaddress = g_strdup(uri->uri + 7);
1563                                                 /* Hiroyuki: please put this function in utils.c! */
1564                                                 fromname = procheader_get_fromname(fromaddress);
1565                                                 extract_address(fromaddress);
1566                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1567                                                 /* Add to address book - Match */
1568                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1569
1570                                                 g_free(fromaddress);
1571                                                 g_free(fromname);
1572                                         } else {
1573                                                 PrefsAccount *account = NULL;
1574                                                 FolderItem   *folder_item;
1575
1576                                                 if (textview->messageview && textview->messageview->mainwin
1577                                                 &&  textview->messageview->mainwin->summaryview
1578                                                 &&  textview->messageview->mainwin->summaryview->folder_item) {
1579                                                         folder_item = textview->messageview->mainwin->summaryview->folder_item;
1580                                                         if (folder_item->prefs && folder_item->prefs->enable_default_account)
1581                                                                 account = account_find_from_id(folder_item->prefs->default_account);
1582                                                 }
1583                                                 compose_new_with_recipient
1584                                                         (account, uri->uri + 7);
1585                                         }
1586                                 } else {
1587                                         open_uri(uri->uri,
1588                                                  prefs_common.uri_cmd);
1589                                 }
1590                         }
1591                 }
1592         }
1593         if (event)
1594                 textview->last_buttonpress = event->type;
1595         return FALSE;
1596 }
1597
1598 static void textview_uri_list_remove_all(GSList *uri_list)
1599 {
1600         GSList *cur;
1601
1602         for (cur = uri_list; cur != NULL; cur = cur->next) {
1603                 if (cur->data) {
1604                         g_free(((RemoteURI *)cur->data)->uri);
1605                         g_free(cur->data);
1606                 }
1607         }
1608
1609         g_slist_free(uri_list);
1610 }