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 #if 0
  96 static GdkColor error_color = {
  97         (gulong)0,
  98         (gushort)0xefff,
  99         (gushort)0,
 100         (gushort)0
 101 };
 102 #endif
 103
 104 static GdkFont *text_sb_font;
 105 static GdkFont *text_mb_font;
 106 static gint text_sb_font_orig_ascent;
 107 static gint text_sb_font_orig_descent;
 108 static gint text_mb_font_orig_ascent;
 109 static gint text_mb_font_orig_descent;
 110 static GdkFont *spacingfont;
 111
 112 static void textview_show_ertf          (TextView       *textview,
 113                                          FILE           *fp,
 114                                          CodeConverter  *conv);
 115 static void textview_add_part           (TextView       *textview,
 116                                          MimeInfo       *mimeinfo,
 117                                          FILE           *fp);
 118 static void textview_add_parts          (TextView       *textview,
 119                                          MimeInfo       *mimeinfo,
 120                                          FILE           *fp);
 121 static void textview_write_body         (TextView       *textview,
 122                                          MimeInfo       *mimeinfo,
 123                                          FILE           *fp,
 124                                          const gchar    *charset);
 125 static void textview_show_html          (TextView       *textview,
 126                                          FILE           *fp,
 127                                          CodeConverter  *conv);
 128 static void textview_write_line         (TextView       *textview,
 129                                          const gchar    *str,
 130                                          CodeConverter  *conv);
 131 static void textview_write_link         (TextView       *textview,
 132                                          const gchar    *url,
 133                                          const gchar    *str,
 134                                          CodeConverter  *conv);
 135 static GPtrArray *textview_scan_header  (TextView       *textview,
 136                                          FILE           *fp);
 137 static void textview_show_header        (TextView       *textview,
 138                                          GPtrArray      *headers);
 139
 140 static gint textview_key_pressed        (GtkWidget      *widget,
 141                                          GdkEventKey    *event,
 142                                          TextView       *textview);
 143 static gint textview_button_pressed     (GtkWidget      *widget,
 144                                          GdkEventButton *event,
 145                                          TextView       *textview);
 146 static gint textview_button_released    (GtkWidget      *widget,
 147                                          GdkEventButton *event,
 148                                          TextView       *textview);
 149
 150 static void textview_uri_list_remove_all(GSList         *uri_list);
 151
 152 static void textview_smooth_scroll_do           (TextView       *textview,
 153                                                  gfloat          old_value,
 154                                                  gfloat          last_value,
 155                                                  gint            step);
 156 static void textview_smooth_scroll_one_line     (TextView       *textview,
 157                                                  gboolean        up);
 158 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 159                                                  gboolean        up);
 160
 161
 162 TextView *textview_create(void)
 163 {
 164         TextView *textview;
 165         GtkWidget *vbox;
 166         GtkWidget *scrolledwin_sb;
 167         GtkWidget *scrolledwin_mb;
 168         GtkWidget *text_sb;
 169         GtkWidget *text_mb;
 170
 171         debug_print(_("Creating text view...\n"));
 172         textview = g_new0(TextView, 1);
 173
 174         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 175         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 176         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 177                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 178         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 179                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 180         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 181         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 182
 183         /* create GtkSText widgets for single-byte and multi-byte character */
 184         text_sb = gtk_stext_new(NULL, NULL);
 185         text_mb = gtk_stext_new(NULL, NULL);
 186         GTK_STEXT(text_sb)->default_tab_width = 8;
 187         GTK_STEXT(text_mb)->default_tab_width = 8;
 188         gtk_widget_show(text_sb);
 189         gtk_widget_show(text_mb);
 190         gtk_stext_set_word_wrap(GTK_STEXT(text_sb), TRUE);
 191         gtk_stext_set_word_wrap(GTK_STEXT(text_mb), TRUE);
 192         gtk_widget_ensure_style(text_sb);
 193         gtk_widget_ensure_style(text_mb);
 194         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 195                 GtkStyle *style;
 196                 GdkFont *font;
 197
 198                 FONT_LOAD(font, prefs_common.normalfont);
 199                 if (font) {
 200                         style = gtk_style_copy(text_sb->style);
 201                         gdk_font_unref(style->font);
 202                         style->font = font;
 203                         gtk_widget_set_style(text_sb, style);
 204                 }
 205         }
 206         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 207                 GtkStyle *style;
 208                 GdkFont *font;
 209
 210                 font = gdk_fontset_load(prefs_common.normalfont);
 211                 if (font) {
 212                         style = gtk_style_copy(text_mb->style);
 213                         gdk_font_unref(style->font);
 214                         style->font = font;
 215                         gtk_widget_set_style(text_mb, style);
 216                 }
 217         }
 218         gtk_widget_ref(scrolledwin_sb);
 219         gtk_widget_ref(scrolledwin_mb);
 220
 221         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 222         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 223         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 224                            GTK_SIGNAL_FUNC(textview_key_pressed),
 225                            textview);
 226         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 227                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 228                                  textview);
 229         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 230                                  GTK_SIGNAL_FUNC(textview_button_released),
 231                                  textview);
 232         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 233                            GTK_SIGNAL_FUNC(textview_key_pressed),
 234                            textview);
 235         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 236                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 237                                  textview);
 238         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 239                                  GTK_SIGNAL_FUNC(textview_button_released),
 240                                  textview);
 241
 242         gtk_widget_show(scrolledwin_sb);
 243         gtk_widget_show(scrolledwin_mb);
 244
 245         vbox = gtk_vbox_new(FALSE, 0);
 246         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 247
 248         gtk_widget_show(vbox);
 249
 250         textview->vbox             = vbox;
 251         textview->scrolledwin      = scrolledwin_sb;
 252         textview->scrolledwin_sb   = scrolledwin_sb;
 253         textview->scrolledwin_mb   = scrolledwin_mb;
 254         textview->text             = text_sb;
 255         textview->text_sb          = text_sb;
 256         textview->text_mb          = text_mb;
 257         textview->text_is_mb       = FALSE;
 258         textview->uri_list         = NULL;
 259         textview->body_pos         = 0;
 260         textview->cur_pos          = 0;
 261         textview->show_all_headers = FALSE;
 262         textview->last_buttonpress = GDK_NOTHING;
 263         textview->show_url_msgid   = 0;
 264
 265         return textview;
 266 }
 267
 268 void textview_init(TextView *textview)
 269 {
 270         gtkut_widget_disable_theme_engine(textview->text_sb);
 271         gtkut_widget_disable_theme_engine(textview->text_mb);
 272         textview_update_message_colors();
 273         textview_set_all_headers(textview, FALSE);
 274         textview_set_font(textview, NULL);
 275 }
 276
 277 void textview_update_message_colors(void)
 278 {
 279         GdkColor black = {0, 0, 0, 0};
 280
 281         if (prefs_common.enable_color) {
 282                 /* grab the quote colors, converting from an int to a GdkColor */
 283                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 284                                                &quote_colors[0]);
 285                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 286                                                &quote_colors[1]);
 287                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 288                                                &quote_colors[2]);
 289                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 290                                                &uri_color);
 291         } else {
 292                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 293                         uri_color = emphasis_color = black;
 294         }
 295 }
 296
 297 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 298                            const gchar *file)
 299 {
 300         GtkSText *text;
 301         FILE *fp;
 302         const gchar *charset = NULL;
 303         GPtrArray *headers = NULL;
 304
 305         if ((fp = fopen(file, "rb")) == NULL) {
 306                 FILE_OP_ERROR(file, "fopen");
 307                 return;
 308         }
 309
 310         if (prefs_common.force_charset)
 311                 charset = prefs_common.force_charset;
 312         else if (mimeinfo->charset)
 313                 charset = mimeinfo->charset;
 314         textview_set_font(textview, charset);
 315         textview_clear(textview);
 316
 317         text = GTK_STEXT(textview->text);
 318
 319         gtk_stext_freeze(text);
 320
 321         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) perror("fseek");
 322         headers = textview_scan_header(textview, fp);
 323         if (headers) {
 324                 textview_show_header(textview, headers);
 325                 procheader_header_array_destroy(headers);
 326                 textview->body_pos = gtk_stext_get_length(text);
 327         }
 328
 329         textview_add_parts(textview, mimeinfo, fp);
 330
 331         gtk_stext_thaw(text);
 332
 333         fclose(fp);
 334 }
 335
 336 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 337 {
 338         GtkSText *text;
 339         gchar buf[BUFFSIZE];
 340         const gchar *boundary = NULL;
 341         gint boundary_len = 0;
 342         const gchar *charset = NULL;
 343         GPtrArray *headers = NULL;
 344         gboolean is_rfc822_part = FALSE;
 345
 346         g_return_if_fail(mimeinfo != NULL);
 347         g_return_if_fail(fp != NULL);
 348
 349         if (mimeinfo->mime_type == MIME_MULTIPART) {
 350                 textview_clear(textview);
 351                 textview_add_parts(textview, mimeinfo, fp);
 352                 return;
 353         }
 354
 355         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 356                 boundary = mimeinfo->parent->boundary;
 357                 boundary_len = strlen(boundary);
 358         }
 359
 360         if (!boundary && (mimeinfo->mime_type == MIME_TEXT ||
 361                           mimeinfo->mime_type == MIME_TEXT_HTML ||
 362                           mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 363
 364                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 365                         perror("fseek");
 366                 headers = textview_scan_header(textview, fp);
 367         } else {
 368                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 369                         glong fpos;
 370                         MimeInfo *parent = mimeinfo->parent;
 371
 372                         while (parent->parent) {
 373                                 if (parent->main &&
 374                                     parent->main->mime_type ==
 375                                         MIME_MESSAGE_RFC822)
 376                                         break;
 377                                 parent = parent->parent;
 378                         }
 379
 380                         if ((fpos = ftell(fp)) < 0)
 381                                 perror("ftell");
 382                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 383                                 perror("fseek");
 384                         else {
 385                                 headers = textview_scan_header(textview, fp);
 386                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 387                                         perror("fseek");
 388                         }
 389                 }
 390                 /* skip MIME part headers */
 391                 while (fgets(buf, sizeof(buf), fp) != NULL)
 392                         if (buf[0] == '\r' || buf[0] == '\n') break;
 393         }
 394
 395         /* display attached RFC822 single text message */
 396         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 397                 if (headers) procheader_header_array_destroy(headers);
 398                 if (!mimeinfo->sub) {
 399                         textview_clear(textview);
 400                         return;
 401                 }
 402                 headers = textview_scan_header(textview, fp);
 403                 mimeinfo = mimeinfo->sub;
 404                 is_rfc822_part = TRUE;
 405         }
 406
 407         if (prefs_common.force_charset)
 408                 charset = prefs_common.force_charset;
 409         else if (mimeinfo->charset)
 410                 charset = mimeinfo->charset;
 411         textview_set_font(textview, charset);
 412
 413         text = GTK_STEXT(textview->text);
 414
 415         gtk_stext_freeze(text);
 416         textview_clear(textview);
 417
 418         if (headers) {
 419                 textview_show_header(textview, headers);
 420                 procheader_header_array_destroy(headers);
 421                 textview->body_pos = gtk_stext_get_length(text);
 422                 if (!mimeinfo->main)
 423                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 424         }
 425
 426         if (mimeinfo->mime_type == MIME_MULTIPART || is_rfc822_part)
 427                 textview_add_parts(textview, mimeinfo, fp);
 428         else
 429                 textview_write_body(textview, mimeinfo, fp, charset);
 430
 431         gtk_stext_thaw(text);
 432 }
 433
 434 static void textview_add_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 435 {
 436         GtkSText *text = GTK_STEXT(textview->text);
 437         gchar buf[BUFFSIZE];
 438         const gchar *boundary = NULL;
 439         gint boundary_len = 0;
 440         const gchar *charset = NULL;
 441         GPtrArray *headers = NULL;
 442
 443         g_return_if_fail(mimeinfo != NULL);
 444         g_return_if_fail(fp != NULL);
 445
 446         if (mimeinfo->mime_type == MIME_MULTIPART) return;
 447
 448         if (!mimeinfo->parent &&
 449             mimeinfo->mime_type != MIME_TEXT &&
 450             mimeinfo->mime_type != MIME_TEXT_HTML &&
 451             mimeinfo->mime_type != MIME_TEXT_ENRICHED)
 452                 return;
 453
 454         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 455                 perror("fseek");
 456                 return;
 457         }
 458
 459         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 460                 boundary = mimeinfo->parent->boundary;
 461                 boundary_len = strlen(boundary);
 462         }
 463
 464         while (fgets(buf, sizeof(buf), fp) != NULL)
 465                 if (buf[0] == '\r' || buf[0] == '\n') break;
 466
 467         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 468                 headers = textview_scan_header(textview, fp);
 469                 if (headers) {
 470                         gtk_stext_freeze(text);
 471                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 472                         textview_show_header(textview, headers);
 473                         procheader_header_array_destroy(headers);
 474                         gtk_stext_thaw(text);
 475                 }
 476                 return;
 477         }
 478
 479         gtk_stext_freeze(text);
 480
 481         if (mimeinfo->filename || mimeinfo->name)
 482                 g_snprintf(buf, sizeof(buf), "\n[%s  %s (%d bytes)]\n",
 483                            mimeinfo->filename ? mimeinfo->filename :
 484                            mimeinfo->name,
 485                            mimeinfo->content_type, mimeinfo->size);
 486         else
 487                 g_snprintf(buf, sizeof(buf), "\n[%s (%d bytes)]\n",
 488                            mimeinfo->content_type, mimeinfo->size);
 489
 490         if (mimeinfo->mime_type != MIME_TEXT &&
 491             mimeinfo->mime_type != MIME_TEXT_HTML &&
 492             mimeinfo->mime_type != MIME_TEXT_ENRICHED) {
 493                 gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 494         } else {
 495                 if (!mimeinfo->main &&
 496                     mimeinfo->parent &&
 497                     mimeinfo->parent->children != mimeinfo)
 498                         gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 499                 else
 500                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 501                 if (prefs_common.force_charset)
 502                         charset = prefs_common.force_charset;
 503                 else if (mimeinfo->charset)
 504                         charset = mimeinfo->charset;
 505                 textview_write_body(textview, mimeinfo, fp, charset);
 506         }
 507
 508         gtk_stext_thaw(text);
 509 }
 510
 511 static void textview_add_parts(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 512 {
 513         gint level;
 514
 515         g_return_if_fail(mimeinfo != NULL);
 516         g_return_if_fail(fp != NULL);
 517
 518         level = mimeinfo->level;
 519
 520         for (;;) {
 521                 textview_add_part(textview, mimeinfo, fp);
 522                 if (mimeinfo->parent && mimeinfo->parent->content_type &&
 523                     !strcasecmp(mimeinfo->parent->content_type,
 524                                 "multipart/alternative"))
 525                         mimeinfo = mimeinfo->parent->next;
 526                 else
 527                         mimeinfo = procmime_mimeinfo_next(mimeinfo);
 528                 if (!mimeinfo || mimeinfo->level <= level)
 529                         break;
 530         }
 531 }
 532
 533 #define TEXT_INSERT(str) \
 534         gtk_stext_insert(text, textview->msgfont, NULL, NULL, str, -1)
 535
 536 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 537 {
 538         GtkSText *text;
 539
 540         if (!partinfo) return;
 541
 542         textview_set_font(textview, NULL);
 543         text = GTK_STEXT(textview->text);
 544         textview_clear(textview);
 545
 546         gtk_stext_freeze(text);
 547
 548         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 549         TEXT_INSERT(_("right click and select `Save as...', "));
 550         TEXT_INSERT(_("or press `y' key.\n\n"));
 551
 552         TEXT_INSERT(_("To display this part as a text message, select "));
 553         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 554
 555         TEXT_INSERT(_("To display this part as an image, select "));
 556         TEXT_INSERT(_("`Display image', or press `i' key.\n\n"));
 557
 558         TEXT_INSERT(_("To open this part with external program, select "));
 559         TEXT_INSERT(_("`Open' or `Open with...', "));
 560         TEXT_INSERT(_("or double-click, or click the center button, "));
 561         TEXT_INSERT(_("or press `l' key."));
 562
 563         gtk_stext_thaw(text);
 564 }
 565
 566 #if USE_GPGME
 567 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 568 {
 569         GtkSText *text;
 570
 571         if (!partinfo) return;
 572
 573         textview_set_font(textview, NULL);
 574         text = GTK_STEXT(textview->text);
 575         textview_clear(textview);
 576
 577         gtk_stext_freeze(text);
 578
 579         if (partinfo->sigstatus_full == NULL) {
 580                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 581                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 582                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 583         } else {
 584                 TEXT_INSERT(partinfo->sigstatus_full);
 585         }
 586
 587         gtk_stext_thaw(text);
 588 }
 589 #endif /* USE_GPGME */
 590
 591 #undef TEXT_INSERT
 592
 593 static void textview_write_body(TextView *textview, MimeInfo *mimeinfo,
 594                                 FILE *fp, const gchar *charset)
 595 {
 596         FILE *tmpfp;
 597         gchar buf[BUFFSIZE];
 598         CodeConverter *conv;
 599
 600         conv = conv_code_converter_new(charset);
 601
 602         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 603         if (tmpfp) {
 604                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 605                         textview_show_html(textview, tmpfp, conv);
 606                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 607                         textview_show_ertf(textview, tmpfp, conv);
 608                 else
 609                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 610                                 textview_write_line(textview, buf, conv);
 611                 fclose(tmpfp);
 612         }
 613
 614         conv_code_converter_destroy(conv);
 615 }
 616
 617 static void textview_show_html(TextView *textview, FILE *fp,
 618                                CodeConverter *conv)
 619 {
 620         HTMLParser *parser;
 621         gchar *str;
 622         gchar* url = NULL;
 623
 624         parser = html_parser_new(fp, conv);
 625         g_return_if_fail(parser != NULL);
 626
 627         while ((str = html_parse(parser)) != NULL) {
 628                 if (parser->state == HTML_HREF) {
 629                         /* first time : get and copy the URL */
 630                         if (url == NULL) {
 631                                 /* ALF - the sylpheed html parser returns an empty string,
 632                                  * if still inside an <a>, but already parsed past HREF */
 633                                 str = strtok(str, " ");
 634                                 if (str) {
 635                                         url = strdup(str);
 636                                         /* the URL may (or not) be followed by the
 637                                          * referenced text */
 638                                         str = strtok(NULL, "");
 639                                 }
 640                         }
 641                         if (str != NULL) {
 642                                 textview_write_link(textview, url, str, NULL);
 643                         }
 644                 } else {
 645                         if (url != NULL) {
 646                                 free(url);
 647                                 url = NULL;
 648                         }
 649                         textview_write_line(textview, str, NULL);
 650                 }
 651         }
 652         html_parser_destroy(parser);
 653 }
 654
 655 static void textview_show_ertf(TextView *textview, FILE *fp,
 656                                CodeConverter *conv)
 657 {
 658         ERTFParser *parser;
 659         gchar *str;
 660         gchar* url = NULL;
 661
 662         parser = ertf_parser_new(fp, conv);
 663         g_return_if_fail(parser != NULL);
 664
 665         while ((str = ertf_parse(parser)) != NULL) {
 666                 textview_write_line(textview, str, NULL);
 667         }
 668         ertf_parser_destroy(parser);
 669 }
 670
 671 /* get_uri_part() - retrieves a URI starting from scanpos.
 672                     Returns TRUE if succesful */
 673 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 674                              const gchar **bp, const gchar **ep)
 675 {
 676         const gchar *ep_;
 677
 678         g_return_val_if_fail(start != NULL, FALSE);
 679         g_return_val_if_fail(scanpos != NULL, FALSE);
 680         g_return_val_if_fail(bp != NULL, FALSE);
 681         g_return_val_if_fail(ep != NULL, FALSE);
 682
 683         *bp = scanpos;
 684
 685         /* find end point of URI */
 686         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 687                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 688                         break;
 689         }
 690
 691         /* no punctuation at end of string */
 692
 693         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 694          * should pass some URI type to this function and decide on that whether
 695          * to perform punctuation stripping */
 696
 697 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 698
 699         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 700                 ;
 701
 702 #undef IS_REAL_PUNCT
 703
 704         *ep = ep_;
 705
 706         return TRUE;
 707 }
 708
 709 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 710 {
 711         return g_strndup(bp, ep - bp);
 712 }
 713
 714 /* valid mail address characters */
 715 #define IS_RFC822_CHAR(ch) \
 716         (isascii(ch) && \
 717          (ch) > 32   && \
 718          (ch) != 127 && \
 719          !isspace(ch) && \
 720          !strchr("(),;<>\"", (ch)))
 721
 722 /* alphabet and number within 7bit ASCII */
 723 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 724 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 725
 726 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 727 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 728                                const gchar **bp, const gchar **ep)
 729 {
 730         /* more complex than the uri part because we need to scan back and forward starting from
 731          * the scan position. */
 732         gboolean result = FALSE;
 733         const gchar *bp_ = NULL;
 734         const gchar *ep_ = NULL;
 735
 736         /* the informative part of the email address (describing the name
 737          * of the email address owner) may contain quoted parts. the
 738          * closure stack stores the last encountered quotes. */
 739         gchar closure_stack[128];
 740         gchar *ptr = closure_stack;
 741
 742         g_return_val_if_fail(start != NULL, FALSE);
 743         g_return_val_if_fail(scanpos != NULL, FALSE);
 744         g_return_val_if_fail(bp != NULL, FALSE);
 745         g_return_val_if_fail(ep != NULL, FALSE);
 746
 747         /* scan start of address */
 748         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 749                 ;
 750
 751         /* TODO: should start with an alnum? */
 752         bp_++;
 753         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 754                 ;
 755
 756         if (bp_ != scanpos) {
 757                 /* scan end of address */
 758                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 759                         ;
 760
 761                 /* TODO: really should terminate with an alnum? */
 762                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 763                         ;
 764                 ep_++;
 765
 766                 if (ep_ > scanpos + 1) {
 767                         *ep = ep_;
 768                         *bp = bp_;
 769                         result = TRUE;
 770                 }
 771         }
 772
 773         if (!result) return FALSE;
 774
 775         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 776         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 777                 return FALSE;
 778
 779         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 780         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 781                 return TRUE;
 782
 783 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 784 #define IN_STACK()      (ptr > closure_stack)
 785 /* has underrun check */
 786 #define POP_STACK()     if(IN_STACK()) --ptr
 787 /* has overrun check */
 788 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 789 /* has underrun check */
 790 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 791
 792         ep_++;
 793
 794         /* scan for the informative part. */
 795         for (bp_ -= 2; bp_ >= start; bp_--) {
 796                 /* if closure on the stack keep scanning */
 797                 if (PEEK_STACK() == *bp_) {
 798                         POP_STACK();
 799                         continue;
 800                 }
 801                 if (*bp_ == '\'' || *bp_ == '"') {
 802                         PUSH_STACK(*bp_);
 803                         continue;
 804                 }
 805
 806                 /* if nothing in the closure stack, do the special conditions
 807                  * the following if..else expression simply checks whether
 808                  * a token is acceptable. if not acceptable, the clause
 809                  * should terminate the loop with a 'break' */
 810                 if (!PEEK_STACK()) {
 811                         if (*bp_ == '-'
 812                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 813                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 814                                 /* hyphens are allowed, but only in
 815                                    between alnums */
 816                         } else if (!ispunct(*bp_)) {
 817                                 /* but anything not being a punctiation
 818                                    is ok */
 819                         } else {
 820                                 break; /* anything else is rejected */
 821                         }
 822                 }
 823         }
 824
 825         bp_++;
 826
 827 #undef PEEK_STACK
 828 #undef PUSH_STACK
 829 #undef POP_STACK
 830 #undef IN_STACK
 831 #undef FULL_STACK
 832
 833         /* scan forward (should start with an alnum) */
 834         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 835                 ;
 836
 837         *ep = ep_;
 838         *bp = bp_;
 839
 840         return result;
 841 }
 842
 843 #undef IS_QUOTE
 844 #undef IS_RFC822_CHAR
 845
 846 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 847 {
 848         /* returns a mailto: URI; mailto: is also used to detect the
 849          * uri type later on in the button_pressed signal handler */
 850         gchar *tmp;
 851         gchar *result;
 852
 853         tmp = g_strndup(bp, ep - bp);
 854         result = g_strconcat("mailto:", tmp, NULL);
 855         g_free(tmp);
 856
 857         return result;
 858 }
 859
 860 #define ADD_TXT_POS(bp_, ep_, pti_) \
 861         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 862                 last = last->next; \
 863                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 864                 last->next = NULL; \
 865         } else { \
 866                 g_warning("alloc error scanning URIs\n"); \
 867                 gtk_stext_insert(text, textview->msgfont, fg_color, NULL, \
 868                                 linebuf, -1); \
 869                 return; \
 870         }
 871
 872 /* textview_make_clickable_parts() - colorizes clickable parts */
 873 static void textview_make_clickable_parts(TextView *textview,
 874                                           GdkFont *font,
 875                                           GdkColor *fg_color,
 876                                           GdkColor *uri_color,
 877                                           const gchar *linebuf)
 878 {
 879         /* parse table - in order of priority */
 880         struct table {
 881                 const gchar *needle; /* token */
 882
 883                 /* token search function */
 884                 gchar    *(*search)     (const gchar *haystack,
 885                                          const gchar *needle);
 886                 /* part parsing function */
 887                 gboolean  (*parse)      (const gchar *start,
 888                                          const gchar *scanpos,
 889                                          const gchar **bp_,
 890                                          const gchar **ep_);
 891                 /* part to URI function */
 892                 gchar    *(*build_uri)  (const gchar *bp,
 893                                          const gchar *ep);
 894         };
 895
 896         static struct table parser[] = {
 897                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 898                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 899                 {"www.",     strcasestr, get_uri_part,   make_uri_string},
 900                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 901                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 902                 {"@",        strcasestr, get_email_part, make_email_string}
 903         };
 904         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 905
 906         gint  n;
 907         const gchar *walk, *bp, *ep;
 908
 909         struct txtpos {
 910                 const gchar     *bp, *ep;       /* text position */
 911                 gint             pti;           /* index in parse table */
 912                 struct txtpos   *next;          /* next */
 913         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 914
 915         GtkSText *text = GTK_STEXT(textview->text);
 916
 917         /* parse for clickable parts, and build a list of begin and end positions  */
 918         for (walk = linebuf, n = 0;;) {
 919                 gint last_index = PARSE_ELEMS;
 920                 gchar *scanpos = NULL;
 921
 922                 /* FIXME: this looks phony. scanning for anything in the parse table */
 923                 for (n = 0; n < PARSE_ELEMS; n++) {
 924                         gchar *tmp;
 925
 926                         tmp = parser[n].search(walk, parser[n].needle);
 927                         if (tmp) {
 928                                 if (scanpos == NULL || tmp < scanpos) {
 929                                         scanpos = tmp;
 930                                         last_index = n;
 931                                 }
 932                         }
 933                 }
 934
 935                 if (scanpos) {
 936                         /* check if URI can be parsed */
 937                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 938                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 939                                         ADD_TXT_POS(bp, ep, last_index);
 940                                         walk = ep;
 941                         } else
 942                                 walk = scanpos +
 943                                         strlen(parser[last_index].needle);
 944                 } else
 945                         break;
 946         }
 947
 948         /* colorize this line */
 949         if (head.next) {
 950                 const gchar *normal_text = linebuf;
 951
 952                 /* insert URIs */
 953                 for (last = head.next; last != NULL;
 954                      normal_text = last->ep, last = last->next) {
 955                         RemoteURI *uri;
 956
 957                         uri = g_new(RemoteURI, 1);
 958                         if (last->bp - normal_text > 0)
 959                                 gtk_stext_insert(text, font,
 960                                                 fg_color, NULL,
 961                                                 normal_text,
 962                                                 last->bp - normal_text);
 963                         uri->uri = parser[last->pti].build_uri(last->bp,
 964                                                                last->ep);
 965                         uri->start = gtk_stext_get_point(text);
 966                         gtk_stext_insert(text, font, uri_color,
 967                                         NULL, last->bp, last->ep - last->bp);
 968                         uri->end = gtk_stext_get_point(text);
 969                         textview->uri_list =
 970                                 g_slist_append(textview->uri_list, uri);
 971                 }
 972
 973                 if (*normal_text)
 974                         gtk_stext_insert(text, font, fg_color,
 975                                         NULL, normal_text, -1);
 976         } else
 977                 gtk_stext_insert(text, font, fg_color, NULL, linebuf, -1);
 978 }
 979
 980 #undef ADD_TXT_POS
 981
 982 /* This function writes str as a double-clickable link with the given url. */
 983 static void textview_write_link(TextView *textview, const gchar *url,
 984                                 const gchar *str, CodeConverter *conv)
 985 {
 986     GdkColor *link_color = NULL;
 987     RemoteURI* uri;
 988     GtkSText *text = GTK_STEXT(textview->text);
 989     gchar buf[BUFFSIZE];
 990
 991     /* this part is taken from textview_write_line. Right now the only place
 992      * that calls this function passes NULL for conv, but you never know. */
 993 #if 0
 994     if (!conv)
 995             strncpy2(buf, str, sizeof(buf));
 996     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 997             gtk_stext_insert(text, textview->msgfont,
 998                             prefs_common.enable_color
 999                             ? &error_color : NULL, NULL,
1000                             "*** Warning: code conversion failed ***\n",
1001                             -1);
1002             return;
1003     }
1004 #endif
1005
1006     if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1007         strncpy2(buf, str, sizeof(buf));
1008
1009     strcrchomp(buf);
1010     gtk_stext_insert(text, textview->msgfont, NULL, NULL, " ", 1);
1011
1012     /* this part is based on the code in make_clickable_parts */
1013     if (prefs_common.enable_color) {
1014         link_color = &uri_color;
1015     }
1016     uri = g_new(RemoteURI, 1);
1017     uri->uri = g_strdup(url);
1018     uri->start = gtk_stext_get_point(text);
1019     gtk_stext_insert(text, textview->msgfont, link_color, NULL, str,
1020                     strlen(str));
1021     uri->end = gtk_stext_get_point(text);
1022     textview->uri_list = g_slist_append(textview->uri_list, uri);
1023 }
1024
1025 static void textview_write_line(TextView *textview, const gchar *str,
1026                                 CodeConverter *conv)
1027 {
1028         GtkSText *text = GTK_STEXT(textview->text);
1029         gchar buf[BUFFSIZE];
1030         GdkColor *fg_color;
1031         gint quotelevel = -1;
1032
1033 #if 0
1034         if (!conv)
1035                 strncpy2(buf, str, sizeof(buf));
1036         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
1037                 gtk_stext_insert(text, textview->msgfont,
1038                                 prefs_common.enable_color
1039                                 ? &error_color : NULL, NULL,
1040                                 "*** Warning: code conversion failed ***\n",
1041                                 -1);
1042                 return;
1043         }
1044 #endif
1045         if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1046                 strncpy2(buf, str, sizeof(buf));
1047
1048         strcrchomp(buf);
1049         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
1050         fg_color = NULL;
1051
1052         /* change color of quotation
1053            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
1054            Up to 3 levels of quotations are detected, and each
1055            level is colored using a different color. */
1056         if (prefs_common.enable_color
1057             && line_has_quote_char(buf, prefs_common.quote_chars)) {
1058                 quotelevel = get_quote_level(buf, prefs_common.quote_chars);
1059
1060                 /* set up the correct foreground color */
1061                 if (quotelevel > 2) {
1062                         /* recycle colors */
1063                         if (prefs_common.recycle_quote_colors)
1064                                 quotelevel %= 3;
1065                         else
1066                                 quotelevel = 2;
1067                 }
1068         }
1069
1070         if (quotelevel == -1)
1071                 fg_color = NULL;
1072         else
1073                 fg_color = &quote_colors[quotelevel];
1074
1075         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
1076                 gtk_stext_insert(text, spacingfont, NULL, NULL, " ", 1);
1077
1078         if (prefs_common.enable_color)
1079                 textview_make_clickable_parts(textview, textview->msgfont,
1080                                               fg_color, &uri_color, buf);
1081         else
1082                 textview_make_clickable_parts(textview, textview->msgfont,
1083                                               fg_color, NULL, buf);
1084 }
1085
1086 void textview_clear(TextView *textview)
1087 {
1088         GtkSText *text = GTK_STEXT(textview->text);
1089
1090         gtk_stext_freeze(text);
1091         gtk_stext_set_point(text, 0);
1092         gtk_stext_forward_delete(text, gtk_stext_get_length(text));
1093         gtk_stext_thaw(text);
1094
1095         textview_uri_list_remove_all(textview->uri_list);
1096         textview->uri_list = NULL;
1097
1098         textview->body_pos = 0;
1099         textview->cur_pos  = 0;
1100 }
1101
1102 void textview_destroy(TextView *textview)
1103 {
1104         textview_uri_list_remove_all(textview->uri_list);
1105         textview->uri_list = NULL;
1106
1107         if (!textview->scrolledwin_sb->parent)
1108                 gtk_widget_destroy(textview->scrolledwin_sb);
1109         if (!textview->scrolledwin_mb->parent)
1110                 gtk_widget_destroy(textview->scrolledwin_mb);
1111
1112         if (textview->msgfont)
1113                 gdk_font_unref(textview->msgfont);
1114         if (textview->boldfont)
1115                 gdk_font_unref(textview->boldfont);
1116
1117         g_free(textview);
1118 }
1119
1120 void textview_set_all_headers(TextView *textview, gboolean all_headers)
1121 {
1122         textview->show_all_headers = all_headers;
1123 }
1124
1125 void textview_set_font(TextView *textview, const gchar *codeset)
1126 {
1127         gboolean use_fontset = TRUE;
1128
1129         /* In multi-byte mode, GtkSText can't display 8bit characters
1130            correctly, so it must be single-byte mode. */
1131         if (MB_CUR_MAX > 1) {
1132                 if (codeset) {
1133                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
1134                             !g_strcasecmp(codeset, "BALTIC"))
1135                                 use_fontset = FALSE;
1136                         else if (conv_get_current_charset() != C_EUC_JP &&
1137                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
1138                                   !g_strncasecmp(codeset, "CP", 2)    ||
1139                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
1140                                 use_fontset = FALSE;
1141                 }
1142         } else
1143                 use_fontset = FALSE;
1144
1145         if (textview->text_is_mb && !use_fontset) {
1146                 GtkWidget *parent;
1147
1148                 parent = textview->scrolledwin_mb->parent;
1149                 gtkut_container_remove(GTK_CONTAINER(parent),
1150                                        textview->scrolledwin_mb);
1151                 gtk_container_add(GTK_CONTAINER(parent),
1152                                   textview->scrolledwin_sb);
1153
1154                 textview->text = textview->text_sb;
1155                 textview->text_is_mb = FALSE;
1156         } else if (!textview->text_is_mb && use_fontset) {
1157                 GtkWidget *parent;
1158
1159                 parent = textview->scrolledwin_sb->parent;
1160                 gtkut_container_remove(GTK_CONTAINER(parent),
1161                                        textview->scrolledwin_sb);
1162                 gtk_container_add(GTK_CONTAINER(parent),
1163                                   textview->scrolledwin_mb);
1164
1165                 textview->text = textview->text_mb;
1166                 textview->text_is_mb = TRUE;
1167         }
1168
1169         if (prefs_common.textfont) {
1170                 GdkFont *font;
1171
1172                 if (use_fontset) {
1173                         if (text_mb_font) {
1174                                 text_mb_font->ascent = text_mb_font_orig_ascent;
1175                                 text_mb_font->descent = text_mb_font_orig_descent;
1176                         }
1177                         font = gdk_fontset_load(prefs_common.textfont);
1178                         if (font && text_mb_font != font) {
1179                                 if (text_mb_font)
1180                                         gdk_font_unref(text_mb_font);
1181                                 text_mb_font = font;
1182                                 text_mb_font_orig_ascent = font->ascent;
1183                                 text_mb_font_orig_descent = font->descent;
1184                         }
1185                 } else {
1186                         if (text_sb_font) {
1187                                 text_sb_font->ascent = text_sb_font_orig_ascent;
1188                                 text_sb_font->descent = text_sb_font_orig_descent;
1189                         }
1190                         if (MB_CUR_MAX > 1) {
1191                                 FONT_LOAD(font, "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
1192                         } else {
1193                                 FONT_LOAD(font, prefs_common.textfont);
1194                         }
1195                         if (font && text_sb_font != font) {
1196                                 if (text_sb_font)
1197                                         gdk_font_unref(text_sb_font);
1198                                 text_sb_font = font;
1199                                 text_sb_font_orig_ascent = font->ascent;
1200                                 text_sb_font_orig_descent = font->descent;
1201                         }
1202                 }
1203
1204                 if (font) {
1205                         gint ascent, descent;
1206
1207                         descent = prefs_common.line_space / 2;
1208                         ascent  = prefs_common.line_space - descent;
1209                         font->ascent  += ascent;
1210                         font->descent += descent;
1211
1212                         if (textview->msgfont)
1213                                 gdk_font_unref(textview->msgfont);
1214                         textview->msgfont = font;
1215                         gdk_font_ref(font);
1216                 }
1217         }
1218
1219         if (!textview->boldfont && prefs_common.boldfont)
1220                 FONT_LOAD(textview->boldfont, prefs_common.boldfont);
1221         if (!spacingfont)
1222                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1223 }
1224
1225 enum
1226 {
1227         H_DATE          = 0,
1228         H_FROM          = 1,
1229         H_TO            = 2,
1230         H_NEWSGROUPS    = 3,
1231         H_SUBJECT       = 4,
1232         H_CC            = 5,
1233         H_REPLY_TO      = 6,
1234         H_FOLLOWUP_TO   = 7,
1235         H_X_MAILER      = 8,
1236         H_X_NEWSREADER  = 9,
1237         H_USER_AGENT    = 10,
1238         H_ORGANIZATION  = 11,
1239 };
1240
1241 void textview_set_position(TextView *textview, gint pos)
1242 {
1243         if (pos < 0) {
1244                 textview->cur_pos =
1245                         gtk_stext_get_length(GTK_STEXT(textview->text));
1246         } else {
1247                 textview->cur_pos = pos;
1248         }
1249 }
1250
1251 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1252 {
1253         gchar buf[BUFFSIZE];
1254         GPtrArray *headers, *sorted_headers;
1255         GSList *disphdr_list;
1256         Header *header;
1257         gint i;
1258
1259         g_return_val_if_fail(fp != NULL, NULL);
1260
1261         if (textview->show_all_headers)
1262                 return procheader_get_header_array_asis(fp);
1263
1264         if (!prefs_common.display_header) {
1265                 while (fgets(buf, sizeof(buf), fp) != NULL)
1266                         if (buf[0] == '\r' || buf[0] == '\n') break;
1267                 return NULL;
1268         }
1269
1270         headers = procheader_get_header_array_asis(fp);
1271
1272         sorted_headers = g_ptr_array_new();
1273
1274         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1275              disphdr_list = disphdr_list->next) {
1276                 DisplayHeaderProp *dp =
1277                         (DisplayHeaderProp *)disphdr_list->data;
1278
1279                 for (i = 0; i < headers->len; i++) {
1280                         header = g_ptr_array_index(headers, i);
1281
1282                         if (procheader_headername_equal(header->name,
1283                                                         dp->name)) {
1284                                 if (dp->hidden)
1285                                         procheader_header_free(header);
1286                                 else
1287                                         g_ptr_array_add(sorted_headers, header);
1288
1289                                 g_ptr_array_remove_index(headers, i);
1290                                 i--;
1291                         }
1292                 }
1293         }
1294
1295         if (prefs_common.show_other_header) {
1296                 for (i = 0; i < headers->len; i++) {
1297                         header = g_ptr_array_index(headers, i);
1298                         g_ptr_array_add(sorted_headers, header);
1299                 }
1300         }
1301
1302         g_ptr_array_free(headers, FALSE);
1303
1304         return sorted_headers;
1305 }
1306
1307 static void textview_show_header(TextView *textview, GPtrArray *headers)
1308 {
1309         GtkSText *text = GTK_STEXT(textview->text);
1310         Header *header;
1311         gint i;
1312
1313         g_return_if_fail(headers != NULL);
1314
1315         gtk_stext_freeze(text);
1316
1317         for (i = 0; i < headers->len; i++) {
1318                 header = g_ptr_array_index(headers, i);
1319                 g_return_if_fail(header->name != NULL);
1320
1321                 gtk_stext_insert(text, textview->boldfont, NULL, NULL,
1322                                 header->name, -1);
1323                 if (header->name[strlen(header->name) - 1] != ' ')
1324                         gtk_stext_insert(text, textview->boldfont,
1325                                         NULL, NULL, " ", 1);
1326
1327                 if (procheader_headername_equal(header->name, "Subject") ||
1328                     procheader_headername_equal(header->name, "From")    ||
1329                     procheader_headername_equal(header->name, "To")      ||
1330                     procheader_headername_equal(header->name, "Cc"))
1331                         unfold_line(header->body);
1332
1333                 if (prefs_common.enable_color &&
1334                     (procheader_headername_equal(header->name, "X-Mailer") ||
1335                      procheader_headername_equal(header->name,
1336                                                  "X-Newsreader")) &&
1337                     strstr(header->body, "Sylpheed") != NULL)
1338                         gtk_stext_insert(text, NULL, &emphasis_color, NULL,
1339                                         header->body, -1);
1340                 else if (prefs_common.enable_color) {
1341                         textview_make_clickable_parts(textview,
1342                                                       NULL, NULL, &uri_color,
1343                                                       header->body);
1344                 } else {
1345                         textview_make_clickable_parts(textview,
1346                                                       NULL, NULL, NULL,
1347                                                       header->body);
1348                 }
1349                 gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1350         }
1351
1352         gtk_stext_thaw(text);
1353 }
1354
1355 gboolean textview_search_string(TextView *textview, const gchar *str,
1356                                 gboolean case_sens)
1357 {
1358         GtkSText *text = GTK_STEXT(textview->text);
1359         gint pos;
1360         wchar_t *wcs;
1361         gint len;
1362         gint text_len;
1363         gboolean found = FALSE;
1364
1365         g_return_val_if_fail(str != NULL, FALSE);
1366
1367         wcs = strdup_mbstowcs(str);
1368         g_return_val_if_fail(wcs != NULL, FALSE);
1369         len = wcslen(wcs);
1370         pos = textview->cur_pos;
1371         if (pos < textview->body_pos)
1372                 pos = textview->body_pos;
1373         text_len = gtk_stext_get_length(text);
1374         if (text_len - pos < len) {
1375                 g_free(wcs);
1376                 return FALSE;
1377         }
1378
1379         for (; pos < text_len; pos++) {
1380                 if (text_len - pos < len) break;
1381                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1382                     == TRUE) {
1383                         gtk_widget_hide(GTK_WIDGET(textview->scrolledwin));
1384                         gtk_editable_set_position(GTK_EDITABLE(text),
1385                                                   pos + len);
1386                         gtk_editable_select_region(GTK_EDITABLE(text),
1387                                                    pos, pos + len);
1388                         gtk_widget_show(GTK_WIDGET(textview->scrolledwin));
1389                         textview_set_position(textview, pos + len);
1390                         found = TRUE;
1391                         break;
1392                 }
1393                 if (text_len - pos == len) break;
1394         }
1395         g_free(wcs);
1396         return found;
1397 }
1398
1399 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1400                                          gboolean case_sens)
1401 {
1402         GtkSText *text = GTK_STEXT(textview->text);
1403         gint pos;
1404         wchar_t *wcs;
1405         gint len;
1406         gint text_len;
1407         gboolean found = FALSE;
1408
1409         g_return_val_if_fail(str != NULL, FALSE);
1410
1411         wcs = strdup_mbstowcs(str);
1412         g_return_val_if_fail(wcs != NULL, FALSE);
1413         len = wcslen(wcs);
1414         pos = textview->cur_pos;
1415         text_len = gtk_stext_get_length(text);
1416         if (text_len - textview->body_pos < len) {
1417                 g_free(wcs);
1418                 return FALSE;
1419         }
1420         if (pos <= textview->body_pos || text_len - pos < len)
1421                 pos = text_len - len;
1422
1423         for (; pos >= textview->body_pos; pos--) {
1424                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1425                     == TRUE) {
1426                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1427                         gtk_editable_select_region(GTK_EDITABLE(text),
1428                                                    pos, pos + len);
1429                         textview_set_position(textview, pos - 1);
1430                         found = TRUE;
1431                         break;
1432                 }
1433                 if (pos == textview->body_pos) break;
1434         }
1435
1436         g_free(wcs);
1437         return found;
1438 }
1439
1440 void textview_scroll_one_line(TextView *textview, gboolean up)
1441 {
1442         GtkSText *text = GTK_STEXT(textview->text);
1443         gfloat upper;
1444
1445         if (prefs_common.enable_smooth_scroll) {
1446                 textview_smooth_scroll_one_line(textview, up);
1447                 return;
1448         }
1449
1450         if (!up) {
1451                 upper = text->vadj->upper - text->vadj->page_size;
1452                 if (text->vadj->value < upper) {
1453                         text->vadj->value +=
1454                                 text->vadj->step_increment * 4;
1455                         text->vadj->value =
1456                                 MIN(text->vadj->value, upper);
1457                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1458                                                 "value_changed");
1459                 }
1460         } else {
1461                 if (text->vadj->value > 0.0) {
1462                         text->vadj->value -=
1463                                 text->vadj->step_increment * 4;
1464                         text->vadj->value =
1465                                 MAX(text->vadj->value, 0.0);
1466                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1467                                                 "value_changed");
1468                 }
1469         }
1470 }
1471
1472 gboolean textview_scroll_page(TextView *textview, gboolean up)
1473 {
1474         GtkSText *text = GTK_STEXT(textview->text);
1475         gfloat upper;
1476         gfloat page_incr;
1477
1478         if (prefs_common.enable_smooth_scroll)
1479                 return textview_smooth_scroll_page(textview, up);
1480
1481         if (prefs_common.scroll_halfpage)
1482                 page_incr = text->vadj->page_increment / 2;
1483         else
1484                 page_incr = text->vadj->page_increment;
1485
1486         if (!up) {
1487                 upper = text->vadj->upper - text->vadj->page_size;
1488                 if (text->vadj->value < upper) {
1489                         text->vadj->value += page_incr;
1490                         text->vadj->value = MIN(text->vadj->value, upper);
1491                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1492                                                 "value_changed");
1493                 } else
1494                         return FALSE;
1495         } else {
1496                 if (text->vadj->value > 0.0) {
1497                         text->vadj->value -= page_incr;
1498                         text->vadj->value = MAX(text->vadj->value, 0.0);
1499                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1500                                                 "value_changed");
1501                 } else
1502                         return FALSE;
1503         }
1504
1505         return TRUE;
1506 }
1507
1508 static void textview_smooth_scroll_do(TextView *textview,
1509                                       gfloat old_value, gfloat last_value,
1510                                       gint step)
1511 {
1512         GtkSText *text = GTK_STEXT(textview->text);
1513         gint change_value;
1514         gboolean up;
1515         gint i;
1516
1517         if (old_value < last_value) {
1518                 change_value = last_value - old_value;
1519                 up = FALSE;
1520         } else {
1521                 change_value = old_value - last_value;
1522                 up = TRUE;
1523         }
1524
1525         gdk_key_repeat_disable();
1526
1527         for (i = step; i <= change_value; i += step) {
1528                 text->vadj->value = old_value + (up ? -i : i);
1529                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1530                                         "value_changed");
1531         }
1532
1533         text->vadj->value = last_value;
1534         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1535
1536         gdk_key_repeat_restore();
1537 }
1538
1539 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1540 {
1541         GtkSText *text = GTK_STEXT(textview->text);
1542         gfloat upper;
1543         gfloat old_value;
1544         gfloat last_value;
1545
1546         if (!up) {
1547                 upper = text->vadj->upper - text->vadj->page_size;
1548                 if (text->vadj->value < upper) {
1549                         old_value = text->vadj->value;
1550                         last_value = text->vadj->value +
1551                                 text->vadj->step_increment * 4;
1552                         last_value = MIN(last_value, upper);
1553
1554                         textview_smooth_scroll_do(textview, old_value,
1555                                                   last_value,
1556                                                   prefs_common.scroll_step);
1557                 }
1558         } else {
1559                 if (text->vadj->value > 0.0) {
1560                         old_value = text->vadj->value;
1561                         last_value = text->vadj->value -
1562                                 text->vadj->step_increment * 4;
1563                         last_value = MAX(last_value, 0.0);
1564
1565                         textview_smooth_scroll_do(textview, old_value,
1566                                                   last_value,
1567                                                   prefs_common.scroll_step);
1568                 }
1569         }
1570 }
1571
1572 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1573 {
1574         GtkSText *text = GTK_STEXT(textview->text);
1575         gfloat upper;
1576         gfloat page_incr;
1577         gfloat old_value;
1578         gfloat last_value;
1579
1580         if (prefs_common.scroll_halfpage)
1581                 page_incr = text->vadj->page_increment / 2;
1582         else
1583                 page_incr = text->vadj->page_increment;
1584
1585         if (!up) {
1586                 upper = text->vadj->upper - text->vadj->page_size;
1587                 if (text->vadj->value < upper) {
1588                         old_value = text->vadj->value;
1589                         last_value = text->vadj->value + page_incr;
1590                         last_value = MIN(last_value, upper);
1591
1592                         textview_smooth_scroll_do(textview, old_value,
1593                                                   last_value,
1594                                                   prefs_common.scroll_step);
1595                 } else
1596                         return FALSE;
1597         } else {
1598                 if (text->vadj->value > 0.0) {
1599                         old_value = text->vadj->value;
1600                         last_value = text->vadj->value - page_incr;
1601                         last_value = MAX(last_value, 0.0);
1602
1603                         textview_smooth_scroll_do(textview, old_value,
1604                                                   last_value,
1605                                                   prefs_common.scroll_step);
1606                 } else
1607                         return FALSE;
1608         }
1609
1610         return TRUE;
1611 }
1612
1613 #define KEY_PRESS_EVENT_STOP() \
1614         if (gtk_signal_n_emissions_by_name \
1615                 (GTK_OBJECT(widget), "key_press_event") > 0) { \
1616                 gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), \
1617                                              "key_press_event"); \
1618         }
1619
1620 static gint textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1621                                  TextView *textview)
1622 {
1623         SummaryView *summaryview = NULL;
1624         MessageView *messageview = textview->messageview;
1625
1626         if (!event) return FALSE;
1627         if (messageview->mainwin)
1628                 summaryview = messageview->mainwin->summaryview;
1629
1630         switch (event->keyval) {
1631         case GDK_Tab:
1632         case GDK_Home:
1633         case GDK_Left:
1634         case GDK_Up:
1635         case GDK_Right:
1636         case GDK_Down:
1637         case GDK_Page_Up:
1638         case GDK_Page_Down:
1639         case GDK_End:
1640         case GDK_Control_L:
1641         case GDK_Control_R:
1642                 break;
1643         case GDK_space:
1644                 if (summaryview)
1645                         summary_pass_key_press_event(summaryview, event);
1646                 else
1647                         textview_scroll_page(textview, FALSE);
1648                 break;
1649         case GDK_BackSpace:
1650                 textview_scroll_page(textview, TRUE);
1651                 break;
1652         case GDK_Return:
1653                 textview_scroll_one_line(textview,
1654                                          (event->state & GDK_MOD1_MASK) != 0);
1655                 break;
1656         case GDK_n:
1657         case GDK_N:
1658         case GDK_p:
1659         case GDK_P:
1660         case GDK_y:
1661         case GDK_t:
1662         case GDK_l:
1663                 if (messageview->type == MVIEW_MIME) {
1664                         KEY_PRESS_EVENT_STOP();
1665                         mimeview_pass_key_press_event(messageview->mimeview,
1666                                                       event);
1667                         break;
1668                 }
1669                 /* fall through */
1670         default:
1671                 if (summaryview)
1672                         summary_pass_key_press_event(summaryview, event);
1673                 break;
1674         }
1675
1676         return TRUE;
1677 }
1678
1679 static gint show_url_timeout_cb(TextView    *textview ){
1680         if (textview->messageview->mainwin)
1681                 if (textview->show_url_msgid)
1682                         gtk_statusbar_remove(GTK_STATUSBAR(
1683                                 textview->messageview->mainwin->statusbar),
1684                                 textview->messageview->mainwin->folderview_cid,
1685                                 textview->show_url_msgid);
1686                 return FALSE;
1687 }
1688
1689 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1690                                     TextView *textview)
1691 {
1692         if (event)
1693                 textview->last_buttonpress = event->type;
1694         return FALSE;
1695 }
1696
1697 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1698                                     TextView *textview)
1699 {
1700         textview->cur_pos =
1701                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1702
1703         if (event &&
1704             ((event->button == 1)
1705              || event->button == 2 || event->button == 3)) {
1706                 GSList *cur;
1707
1708                 /* double click seems to set the cursor after the current
1709                  * word. The cursor position needs fixing, otherwise the
1710                  * last word of a clickable zone will not work */
1711                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1712                         textview->cur_pos--;
1713                 }
1714
1715                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1716                         RemoteURI *uri = (RemoteURI *)cur->data;
1717
1718                         if (textview->cur_pos >= uri->start &&
1719                             textview->cur_pos <  uri->end) {
1720                                 /* single click: display url in statusbar */
1721                                 if (event->button == 1 && textview->last_buttonpress != GDK_2BUTTON_PRESS) {
1722                                         if (textview->messageview->mainwin) {
1723                                                 if (textview->show_url_msgid) {
1724                                                         gtk_timeout_remove(textview->show_url_timeout_tag);
1725                                                         gtk_statusbar_remove(GTK_STATUSBAR(
1726                                                                 textview->messageview->mainwin->statusbar),
1727                                                                 textview->messageview->mainwin->folderview_cid,
1728                                                                 textview->show_url_msgid);
1729                                                         textview->show_url_msgid = 0;
1730                                                 }
1731                                                 textview->show_url_msgid = gtk_statusbar_push(
1732                                                                 GTK_STATUSBAR(textview->messageview->mainwin->statusbar),
1733                                                                 textview->messageview->mainwin->folderview_cid,
1734                                                                 uri->uri);
1735                                                 textview->show_url_timeout_tag = gtk_timeout_add( 2000, show_url_timeout_cb, textview );
1736                                                 gtkut_widget_wait_for_draw(textview->messageview->mainwin->hbox_stat);
1737                                         }
1738                                 } else
1739                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1740                                         if (event->button == 3) {
1741                                                 gchar *fromname, *fromaddress;
1742                                                 GdkEventButton tmpev;
1743
1744                                                 /* extract url */
1745                                                 fromaddress = g_strdup(uri->uri + 7);
1746                                                 /* Hiroyuki: please put this function in utils.c! */
1747                                                 fromname = procheader_get_fromname(fromaddress);
1748                                                 extract_address(fromaddress);
1749                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1750                                                 /* Add to address book - Match */
1751                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1752
1753                                                 g_free(fromaddress);
1754                                                 g_free(fromname);
1755                                         } else {
1756                                                 PrefsAccount *account = NULL;
1757                                                 FolderItem   *folder_item;
1758
1759                                                 if (textview->messageview && textview->messageview->mainwin
1760                                                 &&  textview->messageview->mainwin->summaryview
1761                                                 &&  textview->messageview->mainwin->summaryview->folder_item) {
1762                                                         folder_item = textview->messageview->mainwin->summaryview->folder_item;
1763                                                         if (folder_item->prefs && folder_item->prefs->enable_default_account)
1764                                                                 account = account_find_from_id(folder_item->prefs->default_account);
1765                                                 }
1766                                                 compose_new_with_recipient
1767                                                         (account, uri->uri + 7);
1768                                         }
1769                                 } else {
1770                                         open_uri(uri->uri,
1771                                                  prefs_common.uri_cmd);
1772                                 }
1773                         }
1774                 }
1775         }
1776         if (event)
1777                 textview->last_buttonpress = event->type;
1778         return FALSE;
1779 }
1780
1781 static void textview_uri_list_remove_all(GSList *uri_list)
1782 {
1783         GSList *cur;
1784
1785         for (cur = uri_list; cur != NULL; cur = cur->next) {
1786                 if (cur->data) {
1787                         g_free(((RemoteURI *)cur->data)->uri);
1788                         g_free(cur->data);
1789                 }
1790         }
1791
1792         g_slist_free(uri_list);
1793 }