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 #include "mimeview.h"
  54
  55 typedef struct _RemoteURI       RemoteURI;
  56
  57 struct _RemoteURI
  58 {
  59         gchar *uri;
  60
  61         guint start;
  62         guint end;
  63 };
  64
  65 static GdkColor quote_colors[3] = {
  66         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  67         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  68         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  69 };
  70
  71 static GdkColor signature_color = {
  72         (gulong)0,
  73         (gushort)0x7fff,
  74         (gushort)0x7fff,
  75         (gushort)0x7fff
  76 };
  77
  78 static GdkColor uri_color = {
  79         (gulong)0,
  80         (gushort)0,
  81         (gushort)0,
  82         (gushort)0
  83 };
  84
  85 static GdkColor emphasis_color = {
  86         (gulong)0,
  87         (gushort)0,
  88         (gushort)0,
  89         (gushort)0xcfff
  90 };
  91
  92 #if 0
  93 static GdkColor error_color = {
  94         (gulong)0,
  95         (gushort)0xefff,
  96         (gushort)0,
  97         (gushort)0
  98 };
  99 #endif
 100
 101 #if USE_GPGME
 102 static GdkColor good_sig_color = {
 103         (gulong)0,
 104         (gushort)0,
 105         (gushort)0xbfff,
 106         (gushort)0
 107 };
 108
 109 static GdkColor nocheck_sig_color = {
 110         (gulong)0,
 111         (gushort)0,
 112         (gushort)0,
 113         (gushort)0xcfff
 114 };
 115
 116 static GdkColor bad_sig_color = {
 117         (gulong)0,
 118         (gushort)0xefff,
 119         (gushort)0,
 120         (gushort)0
 121 };
 122 #endif
 123
 124 static GdkFont *text_sb_font;
 125 static GdkFont *text_mb_font;
 126 static gint text_sb_font_orig_ascent;
 127 static gint text_sb_font_orig_descent;
 128 static gint text_mb_font_orig_ascent;
 129 static gint text_mb_font_orig_descent;
 130 static GdkFont *spacingfont;
 131
 132 static void textview_show_ertf          (TextView       *textview,
 133                                          FILE           *fp,
 134                                          CodeConverter  *conv);
 135 static void textview_add_part           (TextView       *textview,
 136                                          MimeInfo       *mimeinfo,
 137                                          FILE           *fp);
 138 static void textview_add_parts          (TextView       *textview,
 139                                          MimeInfo       *mimeinfo,
 140                                          FILE           *fp);
 141 static void textview_write_body         (TextView       *textview,
 142                                          MimeInfo       *mimeinfo,
 143                                          FILE           *fp,
 144                                          const gchar    *charset);
 145 static void textview_show_html          (TextView       *textview,
 146                                          FILE           *fp,
 147                                          CodeConverter  *conv);
 148 static void textview_write_line         (TextView       *textview,
 149                                          const gchar    *str,
 150                                          CodeConverter  *conv);
 151 static void textview_write_link         (TextView       *textview,
 152                                          const gchar    *url,
 153                                          const gchar    *str,
 154                                          CodeConverter  *conv);
 155 static GPtrArray *textview_scan_header  (TextView       *textview,
 156                                          FILE           *fp);
 157 static void textview_show_header        (TextView       *textview,
 158                                          GPtrArray      *headers);
 159
 160 static gint textview_key_pressed        (GtkWidget      *widget,
 161                                          GdkEventKey    *event,
 162                                          TextView       *textview);
 163 static gint textview_button_pressed     (GtkWidget      *widget,
 164                                          GdkEventButton *event,
 165                                          TextView       *textview);
 166 static gint textview_button_released    (GtkWidget      *widget,
 167                                          GdkEventButton *event,
 168                                          TextView       *textview);
 169
 170 static void textview_uri_list_remove_all(GSList         *uri_list);
 171
 172 static void textview_smooth_scroll_do           (TextView       *textview,
 173                                                  gfloat          old_value,
 174                                                  gfloat          last_value,
 175                                                  gint            step);
 176 static void textview_smooth_scroll_one_line     (TextView       *textview,
 177                                                  gboolean        up);
 178 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 179                                                  gboolean        up);
 180
 181
 182 TextView *textview_create(void)
 183 {
 184         TextView *textview;
 185         GtkWidget *vbox;
 186         GtkWidget *scrolledwin_sb;
 187         GtkWidget *scrolledwin_mb;
 188         GtkWidget *text_sb;
 189         GtkWidget *text_mb;
 190
 191         debug_print("Creating text view...\n");
 192         textview = g_new0(TextView, 1);
 193
 194         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 195         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 196         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 197                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 198         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 199                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 200         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 201         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 202
 203         /* create GtkSText widgets for single-byte and multi-byte character */
 204         text_sb = gtk_stext_new(NULL, NULL);
 205         text_mb = gtk_stext_new(NULL, NULL);
 206         GTK_STEXT(text_sb)->default_tab_width = 8;
 207         GTK_STEXT(text_mb)->default_tab_width = 8;
 208         gtk_widget_show(text_sb);
 209         gtk_widget_show(text_mb);
 210         gtk_stext_set_word_wrap(GTK_STEXT(text_sb), TRUE);
 211         gtk_stext_set_word_wrap(GTK_STEXT(text_mb), TRUE);
 212         gtk_widget_ensure_style(text_sb);
 213         gtk_widget_ensure_style(text_mb);
 214         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 215                 GtkStyle *style;
 216                 GdkFont *font;
 217
 218                 font = gtkut_font_load_from_fontset(prefs_common.normalfont);
 219                 if (font) {
 220                         style = gtk_style_copy(text_sb->style);
 221                         gdk_font_unref(style->font);
 222                         style->font = font;
 223                         gtk_widget_set_style(text_sb, style);
 224                 }
 225         }
 226         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 227                 GtkStyle *style;
 228                 GdkFont *font;
 229
 230                 font = gdk_fontset_load(prefs_common.normalfont);
 231                 if (font) {
 232                         style = gtk_style_copy(text_mb->style);
 233                         gdk_font_unref(style->font);
 234                         style->font = font;
 235                         gtk_widget_set_style(text_mb, style);
 236                 }
 237         }
 238         gtk_widget_ref(scrolledwin_sb);
 239         gtk_widget_ref(scrolledwin_mb);
 240
 241         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 242         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 243         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 244                            GTK_SIGNAL_FUNC(textview_key_pressed),
 245                            textview);
 246         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 247                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 248                                  textview);
 249         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 250                                  GTK_SIGNAL_FUNC(textview_button_released),
 251                                  textview);
 252         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 253                            GTK_SIGNAL_FUNC(textview_key_pressed),
 254                            textview);
 255         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 256                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 257                                  textview);
 258         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 259                                  GTK_SIGNAL_FUNC(textview_button_released),
 260                                  textview);
 261
 262         gtk_widget_show(scrolledwin_sb);
 263         gtk_widget_show(scrolledwin_mb);
 264
 265         vbox = gtk_vbox_new(FALSE, 0);
 266         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 267
 268         gtk_widget_show(vbox);
 269
 270         textview->vbox             = vbox;
 271         textview->scrolledwin      = scrolledwin_sb;
 272         textview->scrolledwin_sb   = scrolledwin_sb;
 273         textview->scrolledwin_mb   = scrolledwin_mb;
 274         textview->text             = text_sb;
 275         textview->text_sb          = text_sb;
 276         textview->text_mb          = text_mb;
 277         textview->text_is_mb       = FALSE;
 278         textview->uri_list         = NULL;
 279         textview->body_pos         = 0;
 280         textview->cur_pos          = 0;
 281         textview->show_all_headers = FALSE;
 282         textview->last_buttonpress = GDK_NOTHING;
 283         textview->show_url_msgid   = 0;
 284
 285         return textview;
 286 }
 287
 288 void textview_init(TextView *textview)
 289 {
 290         gtkut_widget_disable_theme_engine(textview->text_sb);
 291         gtkut_widget_disable_theme_engine(textview->text_mb);
 292         textview_update_message_colors();
 293         textview_set_all_headers(textview, FALSE);
 294         textview_set_font(textview, NULL);
 295 }
 296
 297 void textview_update_message_colors(void)
 298 {
 299         GdkColor black = {0, 0, 0, 0};
 300
 301         if (prefs_common.enable_color) {
 302                 /* grab the quote colors, converting from an int to a GdkColor */
 303                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 304                                                &quote_colors[0]);
 305                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 306                                                &quote_colors[1]);
 307                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 308                                                &quote_colors[2]);
 309                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 310                                                &uri_color);
 311                 gtkut_convert_int_to_gdk_color(prefs_common.signature_col,
 312                                                &signature_color);
 313         } else {
 314                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 315                         uri_color = emphasis_color = signature_color = black;
 316         }
 317 }
 318
 319 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 320                            const gchar *file)
 321 {
 322         GtkSText *text;
 323         FILE *fp;
 324         const gchar *charset = NULL;
 325         GPtrArray *headers = NULL;
 326
 327         if ((fp = fopen(file, "rb")) == NULL) {
 328                 FILE_OP_ERROR(file, "fopen");
 329                 return;
 330         }
 331
 332         if (prefs_common.force_charset)
 333                 charset = prefs_common.force_charset;
 334         else if (mimeinfo->charset)
 335                 charset = mimeinfo->charset;
 336         textview_set_font(textview, charset);
 337         textview_clear(textview);
 338
 339         text = GTK_STEXT(textview->text);
 340
 341         gtk_stext_freeze(text);
 342
 343         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) perror("fseek");
 344         headers = textview_scan_header(textview, fp);
 345         if (headers) {
 346                 textview_show_header(textview, headers);
 347                 procheader_header_array_destroy(headers);
 348                 textview->body_pos = gtk_stext_get_length(text);
 349         }
 350
 351         textview_add_parts(textview, mimeinfo, fp);
 352
 353         gtk_stext_thaw(text);
 354
 355         fclose(fp);
 356 }
 357
 358 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 359 {
 360         GtkSText *text;
 361         gchar buf[BUFFSIZE];
 362         const gchar *boundary = NULL;
 363         gint boundary_len = 0;
 364         const gchar *charset = NULL;
 365         GPtrArray *headers = NULL;
 366         gboolean is_rfc822_part = FALSE;
 367
 368         g_return_if_fail(mimeinfo != NULL);
 369         g_return_if_fail(fp != NULL);
 370
 371         if (mimeinfo->mime_type == MIME_MULTIPART) {
 372                 textview_clear(textview);
 373                 textview_add_parts(textview, mimeinfo, fp);
 374                 return;
 375         }
 376
 377         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 378                 boundary = mimeinfo->parent->boundary;
 379                 boundary_len = strlen(boundary);
 380         }
 381
 382         if (!boundary && (mimeinfo->mime_type == MIME_TEXT ||
 383                           mimeinfo->mime_type == MIME_TEXT_HTML ||
 384                           mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 385
 386                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 387                         perror("fseek");
 388                 headers = textview_scan_header(textview, fp);
 389         } else {
 390                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 391                         glong fpos;
 392                         MimeInfo *parent = mimeinfo->parent;
 393
 394                         while (parent->parent) {
 395                                 if (parent->main &&
 396                                     parent->main->mime_type ==
 397                                         MIME_MESSAGE_RFC822)
 398                                         break;
 399                                 parent = parent->parent;
 400                         }
 401
 402                         if ((fpos = ftell(fp)) < 0)
 403                                 perror("ftell");
 404                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 405                                 perror("fseek");
 406                         else {
 407                                 headers = textview_scan_header(textview, fp);
 408                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 409                                         perror("fseek");
 410                         }
 411                 }
 412                 /* skip MIME part headers */
 413                 while (fgets(buf, sizeof(buf), fp) != NULL)
 414                         if (buf[0] == '\r' || buf[0] == '\n') break;
 415         }
 416
 417         /* display attached RFC822 single text message */
 418         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 419                 if (headers) procheader_header_array_destroy(headers);
 420                 if (!mimeinfo->sub) {
 421                         textview_clear(textview);
 422                         return;
 423                 }
 424                 headers = textview_scan_header(textview, fp);
 425                 mimeinfo = mimeinfo->sub;
 426                 is_rfc822_part = TRUE;
 427         }
 428
 429         if (prefs_common.force_charset)
 430                 charset = prefs_common.force_charset;
 431         else if (mimeinfo->charset)
 432                 charset = mimeinfo->charset;
 433         textview_set_font(textview, charset);
 434
 435         text = GTK_STEXT(textview->text);
 436
 437         gtk_stext_freeze(text);
 438         textview_clear(textview);
 439
 440         if (headers) {
 441                 textview_show_header(textview, headers);
 442                 procheader_header_array_destroy(headers);
 443                 textview->body_pos = gtk_stext_get_length(text);
 444                 if (!mimeinfo->main)
 445                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 446         }
 447
 448         if (mimeinfo->mime_type == MIME_MULTIPART || is_rfc822_part)
 449                 textview_add_parts(textview, mimeinfo, fp);
 450         else
 451                 textview_write_body(textview, mimeinfo, fp, charset);
 452
 453         gtk_stext_thaw(text);
 454 }
 455
 456 static void textview_add_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 457 {
 458         GtkSText *text = GTK_STEXT(textview->text);
 459         gchar buf[BUFFSIZE];
 460         const gchar *boundary = NULL;
 461         gint boundary_len = 0;
 462         const gchar *charset = NULL;
 463         GPtrArray *headers = NULL;
 464
 465         g_return_if_fail(mimeinfo != NULL);
 466         g_return_if_fail(fp != NULL);
 467
 468         if (mimeinfo->mime_type == MIME_MULTIPART) return;
 469
 470         if (!mimeinfo->parent &&
 471             mimeinfo->mime_type != MIME_TEXT &&
 472             mimeinfo->mime_type != MIME_TEXT_HTML &&
 473             mimeinfo->mime_type != MIME_TEXT_ENRICHED)
 474                 return;
 475
 476         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 477                 perror("fseek");
 478                 return;
 479         }
 480
 481         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 482                 boundary = mimeinfo->parent->boundary;
 483                 boundary_len = strlen(boundary);
 484         }
 485
 486         while (fgets(buf, sizeof(buf), fp) != NULL)
 487                 if (buf[0] == '\r' || buf[0] == '\n') break;
 488
 489         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 490                 headers = textview_scan_header(textview, fp);
 491                 if (headers) {
 492                         gtk_stext_freeze(text);
 493                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 494                         textview_show_header(textview, headers);
 495                         procheader_header_array_destroy(headers);
 496                         gtk_stext_thaw(text);
 497                 }
 498                 return;
 499         }
 500
 501         gtk_stext_freeze(text);
 502
 503 #if USE_GPGME
 504         if (mimeinfo->sigstatus)
 505                 g_snprintf(buf, sizeof(buf), "\n[%s (%s)]\n",
 506                            mimeinfo->content_type, mimeinfo->sigstatus);
 507         else
 508 #endif
 509         if (mimeinfo->filename || mimeinfo->name)
 510                 g_snprintf(buf, sizeof(buf), "\n[%s  %s (%d bytes)]\n",
 511                            mimeinfo->filename ? mimeinfo->filename :
 512                            mimeinfo->name,
 513                            mimeinfo->content_type, mimeinfo->size);
 514         else
 515                 g_snprintf(buf, sizeof(buf), "\n[%s (%d bytes)]\n",
 516                            mimeinfo->content_type, mimeinfo->size);
 517
 518 #if USE_GPGME
 519         if (mimeinfo->sigstatus && !mimeinfo->sigstatus_full) {
 520                 gchar *tmp;
 521                 /* use standard font */
 522                 gpointer oldfont = textview->msgfont;
 523                 textview->msgfont = NULL;
 524
 525                 tmp = g_strconcat("pgp: ", _("Check signature"), NULL);
 526                 textview_write_link(textview, tmp, buf, NULL);
 527
 528                 /* put things back */
 529                 textview->msgfont = (GdkFont *)oldfont;
 530                 oldfont = NULL;
 531                 g_free(tmp);
 532         } else if (mimeinfo->sigstatus) {
 533                 GdkColor *color;
 534                 if (!strcmp(mimeinfo->sigstatus, _("Good signature")))
 535                         color = &good_sig_color;
 536                 else if (!strcmp(mimeinfo->sigstatus, _("BAD signature")))
 537                         color = &bad_sig_color;
 538                 else
 539                         color = &nocheck_sig_color;
 540                 gtk_stext_insert(text, NULL, color, NULL, buf, -1);
 541         } else
 542 #endif
 543         if (mimeinfo->mime_type != MIME_TEXT &&
 544             mimeinfo->mime_type != MIME_TEXT_HTML &&
 545             mimeinfo->mime_type != MIME_TEXT_ENRICHED) {
 546                 gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 547         } else {
 548                 if (!mimeinfo->main &&
 549                     mimeinfo->parent &&
 550                     mimeinfo->parent->children != mimeinfo)
 551                         gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 552                 else if (prefs_common.display_header)
 553                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 554                 if (prefs_common.force_charset)
 555                         charset = prefs_common.force_charset;
 556                 else if (mimeinfo->charset)
 557                         charset = mimeinfo->charset;
 558                 textview_write_body(textview, mimeinfo, fp, charset);
 559         }
 560
 561         gtk_stext_thaw(text);
 562 }
 563
 564 static void textview_add_parts(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 565 {
 566         gint level;
 567
 568         g_return_if_fail(mimeinfo != NULL);
 569         g_return_if_fail(fp != NULL);
 570
 571         level = mimeinfo->level;
 572
 573         for (;;) {
 574                 textview_add_part(textview, mimeinfo, fp);
 575                 if (mimeinfo->parent && mimeinfo->parent->content_type &&
 576                     !strcasecmp(mimeinfo->parent->content_type,
 577                                 "multipart/alternative"))
 578                         mimeinfo = mimeinfo->parent->next;
 579                 else
 580                         mimeinfo = procmime_mimeinfo_next(mimeinfo);
 581                 if (!mimeinfo || mimeinfo->level <= level)
 582                         break;
 583         }
 584 }
 585
 586 #define TEXT_INSERT(str) \
 587         gtk_stext_insert(text, textview->msgfont, NULL, NULL, str, -1)
 588
 589 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 590 {
 591         GtkSText *text;
 592
 593         if (!partinfo) return;
 594
 595         textview_set_font(textview, NULL);
 596         text = GTK_STEXT(textview->text);
 597         textview_clear(textview);
 598
 599         gtk_stext_freeze(text);
 600
 601         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 602         TEXT_INSERT(_("right click and select `Save as...', "));
 603         TEXT_INSERT(_("or press `y' key.\n\n"));
 604
 605         TEXT_INSERT(_("To display this part as a text message, select "));
 606         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 607
 608         TEXT_INSERT(_("To display this part as an image, select "));
 609         TEXT_INSERT(_("`Display image', or press `i' key.\n\n"));
 610
 611         TEXT_INSERT(_("To open this part with external program, select "));
 612         TEXT_INSERT(_("`Open' or `Open with...', "));
 613         TEXT_INSERT(_("or double-click, or click the center button, "));
 614         TEXT_INSERT(_("or press `l' key."));
 615
 616         gtk_stext_thaw(text);
 617 }
 618
 619 #if USE_GPGME
 620 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 621 {
 622         GtkSText *text;
 623
 624         if (!partinfo) return;
 625
 626         textview_set_font(textview, NULL);
 627         text = GTK_STEXT(textview->text);
 628         textview_clear(textview);
 629
 630         gtk_stext_freeze(text);
 631
 632         if (partinfo->sigstatus_full == NULL) {
 633                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 634                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 635                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 636         } else {
 637                 TEXT_INSERT(partinfo->sigstatus_full);
 638         }
 639
 640         gtk_stext_thaw(text);
 641 }
 642 #endif /* USE_GPGME */
 643
 644 #undef TEXT_INSERT
 645
 646 static void textview_write_body(TextView *textview, MimeInfo *mimeinfo,
 647                                 FILE *fp, const gchar *charset)
 648 {
 649         FILE *tmpfp;
 650         gchar buf[BUFFSIZE];
 651         CodeConverter *conv;
 652
 653         conv = conv_code_converter_new(charset);
 654
 655         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 656
 657         textview->is_in_signature = FALSE;
 658
 659         if (tmpfp) {
 660
 661                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 662                         textview_show_html(textview, tmpfp, conv);
 663                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 664                         textview_show_ertf(textview, tmpfp, conv);
 665                 else
 666                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 667                                 textview_write_line(textview, buf, conv);
 668                 fclose(tmpfp);
 669         }
 670
 671         conv_code_converter_destroy(conv);
 672 }
 673
 674 static void textview_show_html(TextView *textview, FILE *fp,
 675                                CodeConverter *conv)
 676 {
 677         HTMLParser *parser;
 678         gchar *str;
 679         gchar* url = NULL;
 680
 681         parser = html_parser_new(fp, conv);
 682         g_return_if_fail(parser != NULL);
 683
 684         while ((str = html_parse(parser)) != NULL) {
 685                 if (parser->state == HTML_HREF) {
 686                         /* first time : get and copy the URL */
 687                         if (url == NULL) {
 688                                 /* ALF - the sylpheed html parser returns an empty string,
 689                                  * if still inside an <a>, but already parsed past HREF */
 690                                 str = strtok(str, " ");
 691                                 if (str) {
 692                                         url = strdup(str);
 693                                         /* the URL may (or not) be followed by the
 694                                          * referenced text */
 695                                         str = strtok(NULL, "");
 696                                 }
 697                         }
 698                         if (str != NULL) {
 699                                 textview_write_link(textview, url, str, NULL);
 700                         }
 701                 } else {
 702                         if (url != NULL) {
 703                                 free(url);
 704                                 url = NULL;
 705                         }
 706                         textview_write_line(textview, str, NULL);
 707                 }
 708         }
 709
 710         html_parser_destroy(parser);
 711 }
 712
 713 static void textview_show_ertf(TextView *textview, FILE *fp,
 714                                CodeConverter *conv)
 715 {
 716         ERTFParser *parser;
 717         gchar *str;
 718
 719         parser = ertf_parser_new(fp, conv);
 720         g_return_if_fail(parser != NULL);
 721
 722         while ((str = ertf_parse(parser)) != NULL) {
 723                 textview_write_line(textview, str, NULL);
 724         }
 725
 726         ertf_parser_destroy(parser);
 727 }
 728
 729 /* get_uri_part() - retrieves a URI starting from scanpos.
 730                     Returns TRUE if succesful */
 731 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 732                              const gchar **bp, const gchar **ep)
 733 {
 734         const gchar *ep_;
 735
 736         g_return_val_if_fail(start != NULL, FALSE);
 737         g_return_val_if_fail(scanpos != NULL, FALSE);
 738         g_return_val_if_fail(bp != NULL, FALSE);
 739         g_return_val_if_fail(ep != NULL, FALSE);
 740
 741         *bp = scanpos;
 742
 743         /* find end point of URI */
 744         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 745                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 746                         break;
 747         }
 748
 749         /* no punctuation at end of string */
 750
 751         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 752          * should pass some URI type to this function and decide on that whether
 753          * to perform punctuation stripping */
 754
 755 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 756
 757         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 758                 ;
 759
 760 #undef IS_REAL_PUNCT
 761
 762         *ep = ep_;
 763
 764         return TRUE;
 765 }
 766
 767 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 768 {
 769         return g_strndup(bp, ep - bp);
 770 }
 771
 772 /* valid mail address characters */
 773 #define IS_RFC822_CHAR(ch) \
 774         (isascii(ch) && \
 775          (ch) > 32   && \
 776          (ch) != 127 && \
 777          !isspace(ch) && \
 778          !strchr("(),;<>\"", (ch)))
 779
 780 /* alphabet and number within 7bit ASCII */
 781 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 782 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 783
 784 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 785 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 786                                const gchar **bp, const gchar **ep)
 787 {
 788         /* more complex than the uri part because we need to scan back and forward starting from
 789          * the scan position. */
 790         gboolean result = FALSE;
 791         const gchar *bp_ = NULL;
 792         const gchar *ep_ = NULL;
 793
 794         /* the informative part of the email address (describing the name
 795          * of the email address owner) may contain quoted parts. the
 796          * closure stack stores the last encountered quotes. */
 797         gchar closure_stack[128];
 798         gchar *ptr = closure_stack;
 799
 800         g_return_val_if_fail(start != NULL, FALSE);
 801         g_return_val_if_fail(scanpos != NULL, FALSE);
 802         g_return_val_if_fail(bp != NULL, FALSE);
 803         g_return_val_if_fail(ep != NULL, FALSE);
 804
 805         /* scan start of address */
 806         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 807                 ;
 808
 809         /* TODO: should start with an alnum? */
 810         bp_++;
 811         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 812                 ;
 813
 814         if (bp_ != scanpos) {
 815                 /* scan end of address */
 816                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 817                         ;
 818
 819                 /* TODO: really should terminate with an alnum? */
 820                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 821                         ;
 822                 ep_++;
 823
 824                 if (ep_ > scanpos + 1) {
 825                         *ep = ep_;
 826                         *bp = bp_;
 827                         result = TRUE;
 828                 }
 829         }
 830
 831         if (!result) return FALSE;
 832
 833         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 834         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 835                 return FALSE;
 836
 837         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 838         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 839                 return TRUE;
 840
 841 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 842 #define IN_STACK()      (ptr > closure_stack)
 843 /* has underrun check */
 844 #define POP_STACK()     if(IN_STACK()) --ptr
 845 /* has overrun check */
 846 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 847 /* has underrun check */
 848 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 849
 850         ep_++;
 851
 852         /* scan for the informative part. */
 853         for (bp_ -= 2; bp_ >= start; bp_--) {
 854                 /* if closure on the stack keep scanning */
 855                 if (PEEK_STACK() == *bp_) {
 856                         POP_STACK();
 857                         continue;
 858                 }
 859                 if (*bp_ == '\'' || *bp_ == '"') {
 860                         PUSH_STACK(*bp_);
 861                         continue;
 862                 }
 863
 864                 /* if nothing in the closure stack, do the special conditions
 865                  * the following if..else expression simply checks whether
 866                  * a token is acceptable. if not acceptable, the clause
 867                  * should terminate the loop with a 'break' */
 868                 if (!PEEK_STACK()) {
 869                         if (*bp_ == '-'
 870                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 871                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 872                                 /* hyphens are allowed, but only in
 873                                    between alnums */
 874                         } else if (!ispunct(*bp_)) {
 875                                 /* but anything not being a punctiation
 876                                    is ok */
 877                         } else {
 878                                 break; /* anything else is rejected */
 879                         }
 880                 }
 881         }
 882
 883         bp_++;
 884
 885 #undef PEEK_STACK
 886 #undef PUSH_STACK
 887 #undef POP_STACK
 888 #undef IN_STACK
 889 #undef FULL_STACK
 890
 891         /* scan forward (should start with an alnum) */
 892         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 893                 ;
 894
 895         *ep = ep_;
 896         *bp = bp_;
 897
 898         return result;
 899 }
 900
 901 #undef IS_QUOTE
 902 #undef IS_RFC822_CHAR
 903
 904 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 905 {
 906         /* returns a mailto: URI; mailto: is also used to detect the
 907          * uri type later on in the button_pressed signal handler */
 908         gchar *tmp;
 909         gchar *result;
 910
 911         tmp = g_strndup(bp, ep - bp);
 912         result = g_strconcat("mailto:", tmp, NULL);
 913         g_free(tmp);
 914
 915         return result;
 916 }
 917
 918 #define ADD_TXT_POS(bp_, ep_, pti_) \
 919         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 920                 last = last->next; \
 921                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 922                 last->next = NULL; \
 923         } else { \
 924                 g_warning("alloc error scanning URIs\n"); \
 925                 gtk_stext_insert(text, textview->msgfont, fg_color, NULL, \
 926                                 linebuf, -1); \
 927                 return; \
 928         }
 929
 930 /* textview_make_clickable_parts() - colorizes clickable parts */
 931 static void textview_make_clickable_parts(TextView *textview,
 932                                           GdkFont *font,
 933                                           GdkColor *fg_color,
 934                                           GdkColor *uri_color,
 935                                           const gchar *linebuf)
 936 {
 937         /* parse table - in order of priority */
 938         struct table {
 939                 const gchar *needle; /* token */
 940
 941                 /* token search function */
 942                 gchar    *(*search)     (const gchar *haystack,
 943                                          const gchar *needle);
 944                 /* part parsing function */
 945                 gboolean  (*parse)      (const gchar *start,
 946                                          const gchar *scanpos,
 947                                          const gchar **bp_,
 948                                          const gchar **ep_);
 949                 /* part to URI function */
 950                 gchar    *(*build_uri)  (const gchar *bp,
 951                                          const gchar *ep);
 952         };
 953
 954         static struct table parser[] = {
 955                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 956                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 957                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 958                 {"www.",     strcasestr, get_uri_part,   make_uri_string},
 959                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 960                 {"@",        strcasestr, get_email_part, make_email_string}
 961         };
 962         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 963
 964         gint  n;
 965         const gchar *walk, *bp, *ep;
 966
 967         struct txtpos {
 968                 const gchar     *bp, *ep;       /* text position */
 969                 gint             pti;           /* index in parse table */
 970                 struct txtpos   *next;          /* next */
 971         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 972
 973         GtkSText *text = GTK_STEXT(textview->text);
 974
 975         /* parse for clickable parts, and build a list of begin and end positions  */
 976         for (walk = linebuf, n = 0;;) {
 977                 gint last_index = PARSE_ELEMS;
 978                 gchar *scanpos = NULL;
 979
 980                 /* FIXME: this looks phony. scanning for anything in the parse table */
 981                 for (n = 0; n < PARSE_ELEMS; n++) {
 982                         gchar *tmp;
 983
 984                         tmp = parser[n].search(walk, parser[n].needle);
 985                         if (tmp) {
 986                                 if (scanpos == NULL || tmp < scanpos) {
 987                                         scanpos = tmp;
 988                                         last_index = n;
 989                                 }
 990                         }
 991                 }
 992
 993                 if (scanpos) {
 994                         /* check if URI can be parsed */
 995                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 996                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 997                                         ADD_TXT_POS(bp, ep, last_index);
 998                                         walk = ep;
 999                         } else
1000                                 walk = scanpos +
1001                                         strlen(parser[last_index].needle);
1002                 } else
1003                         break;
1004         }
1005
1006         /* colorize this line */
1007         if (head.next) {
1008                 const gchar *normal_text = linebuf;
1009
1010                 /* insert URIs */
1011                 for (last = head.next; last != NULL;
1012                      normal_text = last->ep, last = last->next) {
1013                         RemoteURI *uri;
1014
1015                         uri = g_new(RemoteURI, 1);
1016                         if (last->bp - normal_text > 0)
1017                                 gtk_stext_insert(text, font,
1018                                                 fg_color, NULL,
1019                                                 normal_text,
1020                                                 last->bp - normal_text);
1021                         uri->uri = parser[last->pti].build_uri(last->bp,
1022                                                                last->ep);
1023                         uri->start = gtk_stext_get_point(text);
1024                         gtk_stext_insert(text, font, uri_color,
1025                                         NULL, last->bp, last->ep - last->bp);
1026                         uri->end = gtk_stext_get_point(text);
1027                         textview->uri_list =
1028                                 g_slist_append(textview->uri_list, uri);
1029                 }
1030
1031                 if (*normal_text)
1032                         gtk_stext_insert(text, font, fg_color,
1033                                         NULL, normal_text, -1);
1034         } else
1035                 gtk_stext_insert(text, font, fg_color, NULL, linebuf, -1);
1036 }
1037
1038 #undef ADD_TXT_POS
1039
1040 /* This function writes str as a double-clickable link with the given url. */
1041 static void textview_write_link(TextView *textview, const gchar *url,
1042                                 const gchar *str, CodeConverter *conv)
1043 {
1044     GdkColor *link_color = NULL;
1045     RemoteURI* uri;
1046     GtkSText *text = GTK_STEXT(textview->text);
1047     gchar buf[BUFFSIZE];
1048
1049     /* this part is taken from textview_write_line. Right now the only place
1050      * that calls this function passes NULL for conv, but you never know. */
1051 #if 0
1052     if (!conv)
1053             strncpy2(buf, str, sizeof(buf));
1054     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
1055             gtk_stext_insert(text, textview->msgfont,
1056                             prefs_common.enable_color
1057                             ? &error_color : NULL, NULL,
1058                             "*** Warning: code conversion failed ***\n",
1059                             -1);
1060             return;
1061     }
1062 #endif
1063
1064     if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1065         strncpy2(buf, str, sizeof(buf));
1066
1067     strcrchomp(buf);
1068     gtk_stext_insert(text, textview->msgfont, NULL, NULL, " ", 1);
1069
1070     /* this part is based on the code in make_clickable_parts */
1071     if (prefs_common.enable_color) {
1072         link_color = &uri_color;
1073     }
1074     uri = g_new(RemoteURI, 1);
1075     uri->uri = g_strdup(url);
1076     uri->start = gtk_stext_get_point(text);
1077     gtk_stext_insert(text, textview->msgfont, link_color, NULL, str,
1078                     strlen(str));
1079     uri->end = gtk_stext_get_point(text);
1080     textview->uri_list = g_slist_append(textview->uri_list, uri);
1081 }
1082
1083 static void textview_write_line(TextView *textview, const gchar *str,
1084                                 CodeConverter *conv)
1085 {
1086         GtkSText *text = GTK_STEXT(textview->text);
1087         gchar buf[BUFFSIZE];
1088         GdkColor *fg_color;
1089         gint quotelevel = -1;
1090
1091 #if 0
1092         if (!conv)
1093                 strncpy2(buf, str, sizeof(buf));
1094         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
1095                 gtk_stext_insert(text, textview->msgfont,
1096                                 prefs_common.enable_color
1097                                 ? &error_color : NULL, NULL,
1098                                 "*** Warning: code conversion failed ***\n",
1099                                 -1);
1100                 return;
1101         }
1102 #endif
1103         if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1104                 strncpy2(buf, str, sizeof(buf));
1105
1106         strcrchomp(buf);
1107         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
1108         fg_color = NULL;
1109
1110         /* change color of quotation
1111            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
1112            Up to 3 levels of quotations are detected, and each
1113            level is colored using a different color. */
1114         if (prefs_common.enable_color
1115             && line_has_quote_char(buf, prefs_common.quote_chars)) {
1116                 quotelevel = get_quote_level(buf, prefs_common.quote_chars);
1117
1118                 /* set up the correct foreground color */
1119                 if (quotelevel > 2) {
1120                         /* recycle colors */
1121                         if (prefs_common.recycle_quote_colors)
1122                                 quotelevel %= 3;
1123                         else
1124                                 quotelevel = 2;
1125                 }
1126         }
1127
1128         if (quotelevel == -1)
1129                 fg_color = NULL;
1130         else
1131                 fg_color = &quote_colors[quotelevel];
1132
1133         if (prefs_common.enable_color && (strcmp(buf,"-- \n") == 0 || textview->is_in_signature)) {
1134                 fg_color = &signature_color;
1135                 textview->is_in_signature = TRUE;
1136         }
1137
1138         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
1139                 gtk_stext_insert(text, spacingfont, NULL, NULL, " ", 1);
1140
1141         if (prefs_common.enable_color)
1142                 textview_make_clickable_parts(textview, textview->msgfont,
1143                                               fg_color, &uri_color, buf);
1144         else
1145                 textview_make_clickable_parts(textview, textview->msgfont,
1146                                               fg_color, NULL, buf);
1147 }
1148
1149 void textview_clear(TextView *textview)
1150 {
1151         GtkSText *text = GTK_STEXT(textview->text);
1152
1153         gtk_stext_freeze(text);
1154         gtk_stext_set_point(text, 0);
1155         gtk_stext_forward_delete(text, gtk_stext_get_length(text));
1156         gtk_stext_thaw(text);
1157
1158         textview_uri_list_remove_all(textview->uri_list);
1159         textview->uri_list = NULL;
1160
1161         textview->body_pos = 0;
1162         textview->cur_pos  = 0;
1163 }
1164
1165 void textview_destroy(TextView *textview)
1166 {
1167         textview_uri_list_remove_all(textview->uri_list);
1168         textview->uri_list = NULL;
1169
1170         if (!textview->scrolledwin_sb->parent)
1171                 gtk_widget_destroy(textview->scrolledwin_sb);
1172         if (!textview->scrolledwin_mb->parent)
1173                 gtk_widget_destroy(textview->scrolledwin_mb);
1174
1175         if (textview->msgfont)
1176                 gdk_font_unref(textview->msgfont);
1177         if (textview->boldfont)
1178                 gdk_font_unref(textview->boldfont);
1179
1180         g_free(textview);
1181 }
1182
1183 void textview_set_all_headers(TextView *textview, gboolean all_headers)
1184 {
1185         textview->show_all_headers = all_headers;
1186 }
1187
1188 void textview_set_font(TextView *textview, const gchar *codeset)
1189 {
1190         gboolean use_fontset = TRUE;
1191
1192         /* In multi-byte mode, GtkSText can't display 8bit characters
1193            correctly, so it must be single-byte mode. */
1194         if (MB_CUR_MAX > 1) {
1195                 if (codeset) {
1196                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
1197                             !g_strcasecmp(codeset, "BALTIC"))
1198                                 use_fontset = FALSE;
1199                         else if (conv_get_current_charset() != C_EUC_JP &&
1200                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
1201                                   !g_strncasecmp(codeset, "CP", 2)    ||
1202                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
1203                                 use_fontset = FALSE;
1204                 }
1205         } else
1206                 use_fontset = FALSE;
1207
1208         if (textview->text_is_mb && !use_fontset) {
1209                 GtkWidget *parent;
1210
1211                 parent = textview->scrolledwin_mb->parent;
1212                 gtkut_container_remove(GTK_CONTAINER(parent),
1213                                        textview->scrolledwin_mb);
1214                 gtk_container_add(GTK_CONTAINER(parent),
1215                                   textview->scrolledwin_sb);
1216
1217                 textview->text = textview->text_sb;
1218                 textview->text_is_mb = FALSE;
1219         } else if (!textview->text_is_mb && use_fontset) {
1220                 GtkWidget *parent;
1221
1222                 parent = textview->scrolledwin_sb->parent;
1223                 gtkut_container_remove(GTK_CONTAINER(parent),
1224                                        textview->scrolledwin_sb);
1225                 gtk_container_add(GTK_CONTAINER(parent),
1226                                   textview->scrolledwin_mb);
1227
1228                 textview->text = textview->text_mb;
1229                 textview->text_is_mb = TRUE;
1230         }
1231
1232         if (prefs_common.textfont) {
1233                 GdkFont *font;
1234
1235                 if (use_fontset) {
1236                         if (text_mb_font) {
1237                                 text_mb_font->ascent = text_mb_font_orig_ascent;
1238                                 text_mb_font->descent = text_mb_font_orig_descent;
1239                         }
1240                         font = gdk_fontset_load(prefs_common.textfont);
1241                         if (font && text_mb_font != font) {
1242                                 if (text_mb_font)
1243                                         gdk_font_unref(text_mb_font);
1244                                 text_mb_font = font;
1245                                 text_mb_font_orig_ascent = font->ascent;
1246                                 text_mb_font_orig_descent = font->descent;
1247                         }
1248                 } else {
1249                         if (text_sb_font) {
1250                                 text_sb_font->ascent = text_sb_font_orig_ascent;
1251                                 text_sb_font->descent = text_sb_font_orig_descent;
1252                         }
1253                         if (MB_CUR_MAX > 1)
1254                                 font = gdk_font_load("-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
1255                         else
1256                                 font = gtkut_font_load_from_fontset
1257                                         (prefs_common.textfont);
1258                         if (font && text_sb_font != font) {
1259                                 if (text_sb_font)
1260                                         gdk_font_unref(text_sb_font);
1261                                 text_sb_font = font;
1262                                 text_sb_font_orig_ascent = font->ascent;
1263                                 text_sb_font_orig_descent = font->descent;
1264                         }
1265                 }
1266
1267                 if (font) {
1268                         gint ascent, descent;
1269
1270                         descent = prefs_common.line_space / 2;
1271                         ascent  = prefs_common.line_space - descent;
1272                         font->ascent  += ascent;
1273                         font->descent += descent;
1274
1275                         if (textview->msgfont)
1276                                 gdk_font_unref(textview->msgfont);
1277                         textview->msgfont = font;
1278                         gdk_font_ref(font);
1279                 }
1280         }
1281
1282         if (!textview->boldfont && prefs_common.boldfont)
1283                 textview->boldfont = gtkut_font_load(prefs_common.boldfont);
1284         if (!spacingfont)
1285                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1286 }
1287
1288 enum
1289 {
1290         H_DATE          = 0,
1291         H_FROM          = 1,
1292         H_TO            = 2,
1293         H_NEWSGROUPS    = 3,
1294         H_SUBJECT       = 4,
1295         H_CC            = 5,
1296         H_REPLY_TO      = 6,
1297         H_FOLLOWUP_TO   = 7,
1298         H_X_MAILER      = 8,
1299         H_X_NEWSREADER  = 9,
1300         H_USER_AGENT    = 10,
1301         H_ORGANIZATION  = 11,
1302 };
1303
1304 void textview_set_position(TextView *textview, gint pos)
1305 {
1306         if (pos < 0) {
1307                 textview->cur_pos =
1308                         gtk_stext_get_length(GTK_STEXT(textview->text));
1309         } else {
1310                 textview->cur_pos = pos;
1311         }
1312 }
1313
1314 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1315 {
1316         gchar buf[BUFFSIZE];
1317         GPtrArray *headers, *sorted_headers;
1318         GSList *disphdr_list;
1319         Header *header;
1320         gint i;
1321
1322         g_return_val_if_fail(fp != NULL, NULL);
1323
1324         if (textview->show_all_headers)
1325                 return procheader_get_header_array_asis(fp);
1326
1327         if (!prefs_common.display_header) {
1328                 while (fgets(buf, sizeof(buf), fp) != NULL)
1329                         if (buf[0] == '\r' || buf[0] == '\n') break;
1330                 return NULL;
1331         }
1332
1333         headers = procheader_get_header_array_asis(fp);
1334
1335         sorted_headers = g_ptr_array_new();
1336
1337         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1338              disphdr_list = disphdr_list->next) {
1339                 DisplayHeaderProp *dp =
1340                         (DisplayHeaderProp *)disphdr_list->data;
1341
1342                 for (i = 0; i < headers->len; i++) {
1343                         header = g_ptr_array_index(headers, i);
1344
1345                         if (procheader_headername_equal(header->name,
1346                                                         dp->name)) {
1347                                 if (dp->hidden)
1348                                         procheader_header_free(header);
1349                                 else
1350                                         g_ptr_array_add(sorted_headers, header);
1351
1352                                 g_ptr_array_remove_index(headers, i);
1353                                 i--;
1354                         }
1355                 }
1356         }
1357
1358         if (prefs_common.show_other_header) {
1359                 for (i = 0; i < headers->len; i++) {
1360                         header = g_ptr_array_index(headers, i);
1361                         g_ptr_array_add(sorted_headers, header);
1362                 }
1363                 g_ptr_array_free(headers, TRUE);
1364         } else
1365                 procheader_header_array_destroy(headers);
1366
1367         return sorted_headers;
1368 }
1369
1370 static void textview_show_header(TextView *textview, GPtrArray *headers)
1371 {
1372         GtkSText *text = GTK_STEXT(textview->text);
1373         Header *header;
1374         gint i;
1375
1376         g_return_if_fail(headers != NULL);
1377
1378         gtk_stext_freeze(text);
1379
1380         for (i = 0; i < headers->len; i++) {
1381                 header = g_ptr_array_index(headers, i);
1382                 g_return_if_fail(header->name != NULL);
1383
1384                 gtk_stext_insert(text, textview->boldfont, NULL, NULL,
1385                                 header->name, -1);
1386                 if (header->name[strlen(header->name) - 1] != ' ')
1387                         gtk_stext_insert(text, textview->boldfont,
1388                                         NULL, NULL, " ", 1);
1389
1390                 if (procheader_headername_equal(header->name, "Subject") ||
1391                     procheader_headername_equal(header->name, "From")    ||
1392                     procheader_headername_equal(header->name, "To")      ||
1393                     procheader_headername_equal(header->name, "Cc"))
1394                         unfold_line(header->body);
1395
1396                 if (prefs_common.enable_color &&
1397                     (procheader_headername_equal(header->name, "X-Mailer") ||
1398                      procheader_headername_equal(header->name,
1399                                                  "X-Newsreader")) &&
1400                     strstr(header->body, "Sylpheed") != NULL)
1401                         gtk_stext_insert(text, NULL, &emphasis_color, NULL,
1402                                         header->body, -1);
1403                 else if (prefs_common.enable_color) {
1404                         textview_make_clickable_parts(textview,
1405                                                       NULL, NULL, &uri_color,
1406                                                       header->body);
1407                 } else {
1408                         textview_make_clickable_parts(textview,
1409                                                       NULL, NULL, NULL,
1410                                                       header->body);
1411                 }
1412                 gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1413         }
1414
1415         gtk_stext_thaw(text);
1416 }
1417
1418 gboolean textview_search_string(TextView *textview, const gchar *str,
1419                                 gboolean case_sens)
1420 {
1421         GtkSText *text = GTK_STEXT(textview->text);
1422         gint pos;
1423         wchar_t *wcs;
1424         gint len;
1425         gint text_len;
1426         gboolean found = FALSE;
1427
1428         g_return_val_if_fail(str != NULL, FALSE);
1429
1430         wcs = strdup_mbstowcs(str);
1431         g_return_val_if_fail(wcs != NULL, FALSE);
1432         len = wcslen(wcs);
1433         pos = textview->cur_pos;
1434         if (pos < textview->body_pos)
1435                 pos = textview->body_pos;
1436         text_len = gtk_stext_get_length(text);
1437         if (text_len - pos < len) {
1438                 g_free(wcs);
1439                 return FALSE;
1440         }
1441
1442         for (; pos < text_len; pos++) {
1443                 if (text_len - pos < len) break;
1444                 if (gtk_stext_match_string(text, pos, wcs, len, case_sens)
1445                     == TRUE) {
1446                         gtk_widget_hide(GTK_WIDGET(textview->scrolledwin));
1447                         gtk_editable_set_position(GTK_EDITABLE(text),
1448                                                   pos + len);
1449                         gtk_editable_select_region(GTK_EDITABLE(text),
1450                                                    pos, pos + len);
1451                         gtk_widget_show(GTK_WIDGET(textview->scrolledwin));
1452                         textview_set_position(textview, pos + len);
1453                         found = TRUE;
1454                         break;
1455                 }
1456                 if (text_len - pos == len) break;
1457         }
1458         g_free(wcs);
1459         return found;
1460 }
1461
1462 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1463                                          gboolean case_sens)
1464 {
1465         GtkSText *text = GTK_STEXT(textview->text);
1466         gint pos;
1467         wchar_t *wcs;
1468         gint len;
1469         gint text_len;
1470         gboolean found = FALSE;
1471
1472         g_return_val_if_fail(str != NULL, FALSE);
1473
1474         wcs = strdup_mbstowcs(str);
1475         g_return_val_if_fail(wcs != NULL, FALSE);
1476         len = wcslen(wcs);
1477         pos = textview->cur_pos;
1478         text_len = gtk_stext_get_length(text);
1479         if (text_len - textview->body_pos < len) {
1480                 g_free(wcs);
1481                 return FALSE;
1482         }
1483         if (pos <= textview->body_pos || text_len - pos < len)
1484                 pos = text_len - len;
1485
1486         for (; pos >= textview->body_pos; pos--) {
1487                 if (gtk_stext_match_string(text, pos, wcs, len, case_sens)
1488                     == TRUE) {
1489                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1490                         gtk_editable_select_region(GTK_EDITABLE(text),
1491                                                    pos, pos + len);
1492                         textview_set_position(textview, pos - 1);
1493                         found = TRUE;
1494                         break;
1495                 }
1496                 if (pos == textview->body_pos) break;
1497         }
1498
1499         g_free(wcs);
1500         return found;
1501 }
1502
1503 void textview_scroll_one_line(TextView *textview, gboolean up)
1504 {
1505         GtkSText *text = GTK_STEXT(textview->text);
1506         gfloat upper;
1507
1508         if (prefs_common.enable_smooth_scroll) {
1509                 textview_smooth_scroll_one_line(textview, up);
1510                 return;
1511         }
1512
1513         if (!up) {
1514                 upper = text->vadj->upper - text->vadj->page_size;
1515                 if (text->vadj->value < upper) {
1516                         text->vadj->value +=
1517                                 text->vadj->step_increment * 4;
1518                         text->vadj->value =
1519                                 MIN(text->vadj->value, upper);
1520                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1521                                                 "value_changed");
1522                 }
1523         } else {
1524                 if (text->vadj->value > 0.0) {
1525                         text->vadj->value -=
1526                                 text->vadj->step_increment * 4;
1527                         text->vadj->value =
1528                                 MAX(text->vadj->value, 0.0);
1529                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1530                                                 "value_changed");
1531                 }
1532         }
1533 }
1534
1535 gboolean textview_scroll_page(TextView *textview, gboolean up)
1536 {
1537         GtkSText *text = GTK_STEXT(textview->text);
1538         gfloat upper;
1539         gfloat page_incr;
1540
1541         if (prefs_common.enable_smooth_scroll)
1542                 return textview_smooth_scroll_page(textview, up);
1543
1544         if (prefs_common.scroll_halfpage)
1545                 page_incr = text->vadj->page_increment / 2;
1546         else
1547                 page_incr = text->vadj->page_increment;
1548
1549         if (!up) {
1550                 upper = text->vadj->upper - text->vadj->page_size;
1551                 if (text->vadj->value < upper) {
1552                         text->vadj->value += page_incr;
1553                         text->vadj->value = MIN(text->vadj->value, upper);
1554                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1555                                                 "value_changed");
1556                 } else
1557                         return FALSE;
1558         } else {
1559                 if (text->vadj->value > 0.0) {
1560                         text->vadj->value -= page_incr;
1561                         text->vadj->value = MAX(text->vadj->value, 0.0);
1562                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1563                                                 "value_changed");
1564                 } else
1565                         return FALSE;
1566         }
1567
1568         return TRUE;
1569 }
1570
1571 static void textview_smooth_scroll_do(TextView *textview,
1572                                       gfloat old_value, gfloat last_value,
1573                                       gint step)
1574 {
1575         GtkSText *text = GTK_STEXT(textview->text);
1576         gint change_value;
1577         gboolean up;
1578         gint i;
1579
1580         if (old_value < last_value) {
1581                 change_value = last_value - old_value;
1582                 up = FALSE;
1583         } else {
1584                 change_value = old_value - last_value;
1585                 up = TRUE;
1586         }
1587
1588         gdk_key_repeat_disable();
1589
1590         for (i = step; i <= change_value; i += step) {
1591                 text->vadj->value = old_value + (up ? -i : i);
1592                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1593                                         "value_changed");
1594         }
1595
1596         text->vadj->value = last_value;
1597         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1598
1599         gdk_key_repeat_restore();
1600 }
1601
1602 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1603 {
1604         GtkSText *text = GTK_STEXT(textview->text);
1605         gfloat upper;
1606         gfloat old_value;
1607         gfloat last_value;
1608
1609         if (!up) {
1610                 upper = text->vadj->upper - text->vadj->page_size;
1611                 if (text->vadj->value < upper) {
1612                         old_value = text->vadj->value;
1613                         last_value = text->vadj->value +
1614                                 text->vadj->step_increment * 4;
1615                         last_value = MIN(last_value, upper);
1616
1617                         textview_smooth_scroll_do(textview, old_value,
1618                                                   last_value,
1619                                                   prefs_common.scroll_step);
1620                 }
1621         } else {
1622                 if (text->vadj->value > 0.0) {
1623                         old_value = text->vadj->value;
1624                         last_value = text->vadj->value -
1625                                 text->vadj->step_increment * 4;
1626                         last_value = MAX(last_value, 0.0);
1627
1628                         textview_smooth_scroll_do(textview, old_value,
1629                                                   last_value,
1630                                                   prefs_common.scroll_step);
1631                 }
1632         }
1633 }
1634
1635 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1636 {
1637         GtkSText *text = GTK_STEXT(textview->text);
1638         gfloat upper;
1639         gfloat page_incr;
1640         gfloat old_value;
1641         gfloat last_value;
1642
1643         if (prefs_common.scroll_halfpage)
1644                 page_incr = text->vadj->page_increment / 2;
1645         else
1646                 page_incr = text->vadj->page_increment;
1647
1648         if (!up) {
1649                 upper = text->vadj->upper - text->vadj->page_size;
1650                 if (text->vadj->value < upper) {
1651                         old_value = text->vadj->value;
1652                         last_value = text->vadj->value + page_incr;
1653                         last_value = MIN(last_value, upper);
1654
1655                         textview_smooth_scroll_do(textview, old_value,
1656                                                   last_value,
1657                                                   prefs_common.scroll_step);
1658                 } else
1659                         return FALSE;
1660         } else {
1661                 if (text->vadj->value > 0.0) {
1662                         old_value = text->vadj->value;
1663                         last_value = text->vadj->value - page_incr;
1664                         last_value = MAX(last_value, 0.0);
1665
1666                         textview_smooth_scroll_do(textview, old_value,
1667                                                   last_value,
1668                                                   prefs_common.scroll_step);
1669                 } else
1670                         return FALSE;
1671         }
1672
1673         return TRUE;
1674 }
1675
1676 #define KEY_PRESS_EVENT_STOP() \
1677         if (gtk_signal_n_emissions_by_name \
1678                 (GTK_OBJECT(widget), "key_press_event") > 0) { \
1679                 gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), \
1680                                              "key_press_event"); \
1681         }
1682
1683 static gint textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1684                                  TextView *textview)
1685 {
1686         SummaryView *summaryview = NULL;
1687         MessageView *messageview = textview->messageview;
1688
1689         if (!event) return FALSE;
1690         if (messageview->mainwin)
1691                 summaryview = messageview->mainwin->summaryview;
1692
1693         switch (event->keyval) {
1694         case GDK_Tab:
1695         case GDK_Home:
1696         case GDK_Left:
1697         case GDK_Up:
1698         case GDK_Right:
1699         case GDK_Down:
1700         case GDK_Page_Up:
1701         case GDK_Page_Down:
1702         case GDK_End:
1703         case GDK_Control_L:
1704         case GDK_Control_R:
1705                 break;
1706         case GDK_space:
1707                 if (summaryview)
1708                         summary_pass_key_press_event(summaryview, event);
1709                 else
1710                         textview_scroll_page(textview, FALSE);
1711                 break;
1712         case GDK_BackSpace:
1713                 textview_scroll_page(textview, TRUE);
1714                 break;
1715         case GDK_Return:
1716                 textview_scroll_one_line(textview,
1717                                          (event->state & GDK_MOD1_MASK) != 0);
1718                 break;
1719         case GDK_Delete:
1720                 if (summaryview)
1721                         summary_pass_key_press_event(summaryview, event);
1722                 break;
1723         case GDK_n:
1724         case GDK_N:
1725         case GDK_p:
1726         case GDK_P:
1727         case GDK_y:
1728         case GDK_t:
1729         case GDK_l:
1730                 if (messageview->type == MVIEW_MIME &&
1731                     textview == messageview->mimeview->textview) {
1732                         KEY_PRESS_EVENT_STOP();
1733                         mimeview_pass_key_press_event(messageview->mimeview,
1734                                                       event);
1735                         break;
1736                 }
1737                 /* fall through */
1738         default:
1739                 if (summaryview &&
1740                     event->window != messageview->mainwin->window->window) {
1741                         GdkEventKey tmpev = *event;
1742
1743                         tmpev.window = messageview->mainwin->window->window;
1744                         KEY_PRESS_EVENT_STOP();
1745                         gtk_widget_event(messageview->mainwin->window,
1746                                          (GdkEvent *)&tmpev);
1747                 }
1748                 break;
1749         }
1750
1751         return TRUE;
1752 }
1753
1754 static gint show_url_timeout_cb(gpointer data)
1755 {
1756         TextView *textview = (TextView *)data;
1757
1758         if (textview->messageview->mainwin)
1759                 if (textview->show_url_msgid)
1760                         gtk_statusbar_remove(GTK_STATUSBAR(
1761                                 textview->messageview->mainwin->statusbar),
1762                                 textview->messageview->mainwin->folderview_cid,
1763                                 textview->show_url_msgid);
1764                 return FALSE;
1765 }
1766
1767 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1768                                     TextView *textview)
1769 {
1770         if (event)
1771                 textview->last_buttonpress = event->type;
1772         return FALSE;
1773 }
1774
1775 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1776                                     TextView *textview)
1777 {
1778         textview->cur_pos =
1779                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1780
1781         if (event &&
1782             ((event->button == 1)
1783              || event->button == 2 || event->button == 3)) {
1784                 GSList *cur;
1785
1786                 /* double click seems to set the cursor after the current
1787                  * word. The cursor position needs fixing, otherwise the
1788                  * last word of a clickable zone will not work */
1789                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1790                         textview->cur_pos--;
1791                 }
1792
1793                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1794                         RemoteURI *uri = (RemoteURI *)cur->data;
1795
1796                         if (textview->cur_pos >= uri->start &&
1797                             textview->cur_pos <  uri->end) {
1798                                 /* single click: display url in statusbar */
1799                                 if (event->button == 1 && textview->last_buttonpress != GDK_2BUTTON_PRESS) {
1800                                         if (textview->messageview->mainwin) {
1801                                                 if (textview->show_url_msgid) {
1802                                                         gtk_timeout_remove(textview->show_url_timeout_tag);
1803                                                         gtk_statusbar_remove(GTK_STATUSBAR(
1804                                                                 textview->messageview->mainwin->statusbar),
1805                                                                 textview->messageview->mainwin->folderview_cid,
1806                                                                 textview->show_url_msgid);
1807                                                         textview->show_url_msgid = 0;
1808                                                 }
1809                                                 textview->show_url_msgid = gtk_statusbar_push(
1810                                                                 GTK_STATUSBAR(textview->messageview->mainwin->statusbar),
1811                                                                 textview->messageview->mainwin->folderview_cid,
1812                                                                 uri->uri);
1813                                                 textview->show_url_timeout_tag = gtk_timeout_add( 4000, show_url_timeout_cb, textview );
1814                                                 gtkut_widget_wait_for_draw(textview->messageview->mainwin->hbox_stat);
1815                                         }
1816                                 } else
1817                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1818                                         if (event->button == 3) {
1819                                                 gchar *fromname, *fromaddress;
1820
1821                                                 /* extract url */
1822                                                 fromaddress = g_strdup(uri->uri + 7);
1823                                                 /* Hiroyuki: please put this function in utils.c! */
1824                                                 fromname = procheader_get_fromname(fromaddress);
1825                                                 extract_address(fromaddress);
1826                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1827                                                 /* Add to address book - Match */
1828                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1829
1830                                                 g_free(fromaddress);
1831                                                 g_free(fromname);
1832                                         } else {
1833                                                 PrefsAccount *account = NULL;
1834                                                 FolderItem   *folder_item;
1835
1836                                                 if (textview->messageview && textview->messageview->mainwin
1837                                                 &&  textview->messageview->mainwin->summaryview
1838                                                 &&  textview->messageview->mainwin->summaryview->folder_item) {
1839                                                         folder_item = textview->messageview->mainwin->summaryview->folder_item;
1840                                                         if (folder_item->prefs && folder_item->prefs->enable_default_account)
1841                                                                 account = account_find_from_id(folder_item->prefs->default_account);
1842                                                 }
1843                                                 compose_new(account, uri->uri + 7, NULL);
1844                                         }
1845                                 } else
1846 #if USE_GPGME
1847                                 if (!g_strncasecmp(uri->uri, "pgp:", 4)) {
1848                                         GtkAdjustment *pos = gtk_scrolled_window_get_vadjustment(
1849                                                                 GTK_SCROLLED_WINDOW(textview->scrolledwin));
1850                                         gfloat vpos = pos->value;
1851                                         mimeview_check_signature(textview->messageview->mimeview);
1852                                         /* scroll back where we were */
1853                                         gtk_adjustment_set_value(pos, vpos);
1854                                 } else
1855 #endif
1856                                 {
1857                                         open_uri(uri->uri,
1858                                                  prefs_common.uri_cmd);
1859                                 }
1860                         }
1861                 }
1862         }
1863         if (event)
1864                 textview->last_buttonpress = event->type;
1865         return FALSE;
1866 }
1867
1868 static void textview_uri_list_remove_all(GSList *uri_list)
1869 {
1870         GSList *cur;
1871
1872         for (cur = uri_list; cur != NULL; cur = cur->next) {
1873                 if (cur->data) {
1874                         g_free(((RemoteURI *)cur->data)->uri);
1875                         g_free(cur->data);
1876                 }
1877         }
1878
1879         g_slist_free(uri_list);
1880 }