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