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