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