src/textview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <gdk/gdk.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <gtk/gtkvbox.h>
  30 #include <gtk/gtkscrolledwindow.h>
  31 #include <gtk/gtksignal.h>
  32 #include <stdio.h>
  33 #include <ctype.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36
  37 #include "intl.h"
  38 #include "main.h"
  39 #include "summaryview.h"
  40 #include "procheader.h"
  41 #include "prefs_common.h"
  42 #include "codeconv.h"
  43 #include "gtkstext.h"
  44 #include "utils.h"
  45 #include "gtkutils.h"
  46 #include "procmime.h"
  47 #include "html.h"
  48 #include "enriched.h"
  49 #include "compose.h"
  50 #include "addressbook.h"
  51 #include "displayheader.h"
  52 #include "account.h"
  53 #include "mimeview.h"
  54
  55 #define FONT_LOAD(font, s) \
  56 { \
  57         gchar *fontstr, *p; \
  58  \
  59         Xstrdup_a(fontstr, s, ); \
  60         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  61         font = gdk_font_load(fontstr); \
  62         if (!font) \
  63                 g_warning("Couldn't load the font '%s'\n", fontstr); \
  64 }
  65
  66 typedef struct _RemoteURI       RemoteURI;
  67
  68 struct _RemoteURI
  69 {
  70         gchar *uri;
  71
  72         guint start;
  73         guint end;
  74 };
  75
  76 static GdkColor quote_colors[3] = {
  77         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  78         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  79         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  80 };
  81
  82 static GdkColor signature_color = {
  83         (gulong)0,
  84         (gushort)0x7fff,
  85         (gushort)0x7fff,
  86         (gushort)0x7fff
  87 };
  88
  89 static GdkColor uri_color = {
  90         (gulong)0,
  91         (gushort)0,
  92         (gushort)0,
  93         (gushort)0
  94 };
  95
  96 static GdkColor emphasis_color = {
  97         (gulong)0,
  98         (gushort)0,
  99         (gushort)0,
 100         (gushort)0xcfff
 101 };
 102
 103 #if 0
 104 static GdkColor error_color = {
 105         (gulong)0,
 106         (gushort)0xefff,
 107         (gushort)0,
 108         (gushort)0
 109 };
 110 #endif
 111
 112 static GdkFont *text_sb_font;
 113 static GdkFont *text_mb_font;
 114 static gint text_sb_font_orig_ascent;
 115 static gint text_sb_font_orig_descent;
 116 static gint text_mb_font_orig_ascent;
 117 static gint text_mb_font_orig_descent;
 118 static GdkFont *spacingfont;
 119
 120 static void textview_show_ertf          (TextView       *textview,
 121                                          FILE           *fp,
 122                                          CodeConverter  *conv);
 123 static void textview_add_part           (TextView       *textview,
 124                                          MimeInfo       *mimeinfo,
 125                                          FILE           *fp);
 126 static void textview_add_parts          (TextView       *textview,
 127                                          MimeInfo       *mimeinfo,
 128                                          FILE           *fp);
 129 static void textview_write_body         (TextView       *textview,
 130                                          MimeInfo       *mimeinfo,
 131                                          FILE           *fp,
 132                                          const gchar    *charset);
 133 static void textview_show_html          (TextView       *textview,
 134                                          FILE           *fp,
 135                                          CodeConverter  *conv);
 136 static void textview_write_line         (TextView       *textview,
 137                                          const gchar    *str,
 138                                          CodeConverter  *conv);
 139 static void textview_write_link         (TextView       *textview,
 140                                          const gchar    *url,
 141                                          const gchar    *str,
 142                                          CodeConverter  *conv);
 143 static GPtrArray *textview_scan_header  (TextView       *textview,
 144                                          FILE           *fp);
 145 static void textview_show_header        (TextView       *textview,
 146                                          GPtrArray      *headers);
 147
 148 static gint textview_key_pressed        (GtkWidget      *widget,
 149                                          GdkEventKey    *event,
 150                                          TextView       *textview);
 151 static gint textview_button_pressed     (GtkWidget      *widget,
 152                                          GdkEventButton *event,
 153                                          TextView       *textview);
 154 static gint textview_button_released    (GtkWidget      *widget,
 155                                          GdkEventButton *event,
 156                                          TextView       *textview);
 157
 158 static void textview_uri_list_remove_all(GSList         *uri_list);
 159
 160 static void textview_smooth_scroll_do           (TextView       *textview,
 161                                                  gfloat          old_value,
 162                                                  gfloat          last_value,
 163                                                  gint            step);
 164 static void textview_smooth_scroll_one_line     (TextView       *textview,
 165                                                  gboolean        up);
 166 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 167                                                  gboolean        up);
 168
 169
 170 TextView *textview_create(void)
 171 {
 172         TextView *textview;
 173         GtkWidget *vbox;
 174         GtkWidget *scrolledwin_sb;
 175         GtkWidget *scrolledwin_mb;
 176         GtkWidget *text_sb;
 177         GtkWidget *text_mb;
 178
 179         debug_print("Creating text view...\n");
 180         textview = g_new0(TextView, 1);
 181
 182         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 183         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 184         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 185                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 186         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 187                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 188         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 189         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 190
 191         /* create GtkSText widgets for single-byte and multi-byte character */
 192         text_sb = gtk_stext_new(NULL, NULL);
 193         text_mb = gtk_stext_new(NULL, NULL);
 194         GTK_STEXT(text_sb)->default_tab_width = 8;
 195         GTK_STEXT(text_mb)->default_tab_width = 8;
 196         gtk_widget_show(text_sb);
 197         gtk_widget_show(text_mb);
 198         gtk_stext_set_word_wrap(GTK_STEXT(text_sb), TRUE);
 199         gtk_stext_set_word_wrap(GTK_STEXT(text_mb), TRUE);
 200         gtk_widget_ensure_style(text_sb);
 201         gtk_widget_ensure_style(text_mb);
 202         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 203                 GtkStyle *style;
 204                 GdkFont *font;
 205
 206                 FONT_LOAD(font, prefs_common.normalfont);
 207                 if (font) {
 208                         style = gtk_style_copy(text_sb->style);
 209                         gdk_font_unref(style->font);
 210                         style->font = font;
 211                         gtk_widget_set_style(text_sb, style);
 212                 }
 213         }
 214         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 215                 GtkStyle *style;
 216                 GdkFont *font;
 217
 218                 font = gdk_fontset_load(prefs_common.normalfont);
 219                 if (font) {
 220                         style = gtk_style_copy(text_mb->style);
 221                         gdk_font_unref(style->font);
 222                         style->font = font;
 223                         gtk_widget_set_style(text_mb, style);
 224                 }
 225         }
 226         gtk_widget_ref(scrolledwin_sb);
 227         gtk_widget_ref(scrolledwin_mb);
 228
 229         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 230         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 231         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 232                            GTK_SIGNAL_FUNC(textview_key_pressed),
 233                            textview);
 234         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 235                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 236                                  textview);
 237         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 238                                  GTK_SIGNAL_FUNC(textview_button_released),
 239                                  textview);
 240         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 241                            GTK_SIGNAL_FUNC(textview_key_pressed),
 242                            textview);
 243         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 244                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 245                                  textview);
 246         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 247                                  GTK_SIGNAL_FUNC(textview_button_released),
 248                                  textview);
 249
 250         gtk_widget_show(scrolledwin_sb);
 251         gtk_widget_show(scrolledwin_mb);
 252
 253         vbox = gtk_vbox_new(FALSE, 0);
 254         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 255
 256         gtk_widget_show(vbox);
 257
 258         textview->vbox             = vbox;
 259         textview->scrolledwin      = scrolledwin_sb;
 260         textview->scrolledwin_sb   = scrolledwin_sb;
 261         textview->scrolledwin_mb   = scrolledwin_mb;
 262         textview->text             = text_sb;
 263         textview->text_sb          = text_sb;
 264         textview->text_mb          = text_mb;
 265         textview->text_is_mb       = FALSE;
 266         textview->uri_list         = NULL;
 267         textview->body_pos         = 0;
 268         textview->cur_pos          = 0;
 269         textview->show_all_headers = FALSE;
 270         textview->last_buttonpress = GDK_NOTHING;
 271         textview->show_url_msgid   = 0;
 272
 273         return textview;
 274 }
 275
 276 void textview_init(TextView *textview)
 277 {
 278         gtkut_widget_disable_theme_engine(textview->text_sb);
 279         gtkut_widget_disable_theme_engine(textview->text_mb);
 280         textview_update_message_colors();
 281         textview_set_all_headers(textview, FALSE);
 282         textview_set_font(textview, NULL);
 283 }
 284
 285 void textview_update_message_colors(void)
 286 {
 287         GdkColor black = {0, 0, 0, 0};
 288
 289         if (prefs_common.enable_color) {
 290                 /* grab the quote colors, converting from an int to a GdkColor */
 291                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 292                                                &quote_colors[0]);
 293                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 294                                                &quote_colors[1]);
 295                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 296                                                &quote_colors[2]);
 297                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 298                                                &uri_color);
 299                 gtkut_convert_int_to_gdk_color(prefs_common.signature_col,
 300                                                &signature_color);
 301         } else {
 302                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 303                         uri_color = emphasis_color = signature_color = black;
 304         }
 305 }
 306
 307 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 308                            const gchar *file)
 309 {
 310         GtkSText *text;
 311         FILE *fp;
 312         const gchar *charset = NULL;
 313         GPtrArray *headers = NULL;
 314
 315         if ((fp = fopen(file, "rb")) == NULL) {
 316                 FILE_OP_ERROR(file, "fopen");
 317                 return;
 318         }
 319
 320         if (prefs_common.force_charset)
 321                 charset = prefs_common.force_charset;
 322         else if (mimeinfo->charset)
 323                 charset = mimeinfo->charset;
 324         textview_set_font(textview, charset);
 325         textview_clear(textview);
 326
 327         text = GTK_STEXT(textview->text);
 328
 329         gtk_stext_freeze(text);
 330
 331         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) perror("fseek");
 332         headers = textview_scan_header(textview, fp);
 333         if (headers) {
 334                 textview_show_header(textview, headers);
 335                 procheader_header_array_destroy(headers);
 336                 textview->body_pos = gtk_stext_get_length(text);
 337         }
 338
 339         textview_add_parts(textview, mimeinfo, fp);
 340
 341         gtk_stext_thaw(text);
 342
 343         fclose(fp);
 344 }
 345
 346 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 347 {
 348         GtkSText *text;
 349         gchar buf[BUFFSIZE];
 350         const gchar *boundary = NULL;
 351         gint boundary_len = 0;
 352         const gchar *charset = NULL;
 353         GPtrArray *headers = NULL;
 354         gboolean is_rfc822_part = FALSE;
 355
 356         g_return_if_fail(mimeinfo != NULL);
 357         g_return_if_fail(fp != NULL);
 358
 359         if (mimeinfo->mime_type == MIME_MULTIPART) {
 360                 textview_clear(textview);
 361                 textview_add_parts(textview, mimeinfo, fp);
 362                 return;
 363         }
 364
 365         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 366                 boundary = mimeinfo->parent->boundary;
 367                 boundary_len = strlen(boundary);
 368         }
 369
 370         if (!boundary && (mimeinfo->mime_type == MIME_TEXT ||
 371                           mimeinfo->mime_type == MIME_TEXT_HTML ||
 372                           mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 373
 374                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 375                         perror("fseek");
 376                 headers = textview_scan_header(textview, fp);
 377         } else {
 378                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 379                         glong fpos;
 380                         MimeInfo *parent = mimeinfo->parent;
 381
 382                         while (parent->parent) {
 383                                 if (parent->main &&
 384                                     parent->main->mime_type ==
 385                                         MIME_MESSAGE_RFC822)
 386                                         break;
 387                                 parent = parent->parent;
 388                         }
 389
 390                         if ((fpos = ftell(fp)) < 0)
 391                                 perror("ftell");
 392                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 393                                 perror("fseek");
 394                         else {
 395                                 headers = textview_scan_header(textview, fp);
 396                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 397                                         perror("fseek");
 398                         }
 399                 }
 400                 /* skip MIME part headers */
 401                 while (fgets(buf, sizeof(buf), fp) != NULL)
 402                         if (buf[0] == '\r' || buf[0] == '\n') break;
 403         }
 404
 405         /* display attached RFC822 single text message */
 406         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 407                 if (headers) procheader_header_array_destroy(headers);
 408                 if (!mimeinfo->sub) {
 409                         textview_clear(textview);
 410                         return;
 411                 }
 412                 headers = textview_scan_header(textview, fp);
 413                 mimeinfo = mimeinfo->sub;
 414                 is_rfc822_part = TRUE;
 415         }
 416
 417         if (prefs_common.force_charset)
 418                 charset = prefs_common.force_charset;
 419         else if (mimeinfo->charset)
 420                 charset = mimeinfo->charset;
 421         textview_set_font(textview, charset);
 422
 423         text = GTK_STEXT(textview->text);
 424
 425         gtk_stext_freeze(text);
 426         textview_clear(textview);
 427
 428         if (headers) {
 429                 textview_show_header(textview, headers);
 430                 procheader_header_array_destroy(headers);
 431                 textview->body_pos = gtk_stext_get_length(text);
 432                 if (!mimeinfo->main)
 433                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 434         }
 435
 436         if (mimeinfo->mime_type == MIME_MULTIPART || is_rfc822_part)
 437                 textview_add_parts(textview, mimeinfo, fp);
 438         else
 439                 textview_write_body(textview, mimeinfo, fp, charset);
 440
 441         gtk_stext_thaw(text);
 442 }
 443
 444 static void textview_add_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 445 {
 446         GtkSText *text = GTK_STEXT(textview->text);
 447         gchar buf[BUFFSIZE];
 448         const gchar *boundary = NULL;
 449         gint boundary_len = 0;
 450         const gchar *charset = NULL;
 451         GPtrArray *headers = NULL;
 452
 453         g_return_if_fail(mimeinfo != NULL);
 454         g_return_if_fail(fp != NULL);
 455
 456         if (mimeinfo->mime_type == MIME_MULTIPART) return;
 457
 458         if (!mimeinfo->parent &&
 459             mimeinfo->mime_type != MIME_TEXT &&
 460             mimeinfo->mime_type != MIME_TEXT_HTML &&
 461             mimeinfo->mime_type != MIME_TEXT_ENRICHED)
 462                 return;
 463
 464         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 465                 perror("fseek");
 466                 return;
 467         }
 468
 469         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 470                 boundary = mimeinfo->parent->boundary;
 471                 boundary_len = strlen(boundary);
 472         }
 473
 474         while (fgets(buf, sizeof(buf), fp) != NULL)
 475                 if (buf[0] == '\r' || buf[0] == '\n') break;
 476
 477         if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 478                 headers = textview_scan_header(textview, fp);
 479                 if (headers) {
 480                         gtk_stext_freeze(text);
 481                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 482                         textview_show_header(textview, headers);
 483                         procheader_header_array_destroy(headers);
 484                         gtk_stext_thaw(text);
 485                 }
 486                 return;
 487         }
 488
 489         gtk_stext_freeze(text);
 490
 491 #if USE_GPGME
 492         if (mimeinfo->sigstatus)
 493                 g_snprintf(buf, sizeof(buf), "\n[%s (%s)]\n",
 494                            mimeinfo->content_type, mimeinfo->sigstatus);
 495         else
 496 #endif
 497         if (mimeinfo->filename || mimeinfo->name)
 498                 g_snprintf(buf, sizeof(buf), "\n[%s  %s (%d bytes)]\n",
 499                            mimeinfo->filename ? mimeinfo->filename :
 500                            mimeinfo->name,
 501                            mimeinfo->content_type, mimeinfo->size);
 502         else
 503                 g_snprintf(buf, sizeof(buf), "\n[%s (%d bytes)]\n",
 504                            mimeinfo->content_type, mimeinfo->size);
 505
 506 #if USE_GPGME
 507         if (mimeinfo->sigstatus && !mimeinfo->sigstatus_full) {
 508                 gchar *tmp;
 509                 /* use standard font */
 510                 gpointer oldfont = textview->msgfont;
 511                 textview->msgfont = NULL;
 512
 513                 tmp = g_strconcat("pgp: ", _("Check signature"), NULL);
 514                 textview_write_link(textview, tmp, buf, NULL);
 515
 516                 /* put things back */
 517                 textview->msgfont = (GdkFont *)oldfont;
 518                 oldfont = NULL;
 519                 g_free(tmp);
 520         } else
 521 #endif
 522         if (mimeinfo->mime_type != MIME_TEXT &&
 523             mimeinfo->mime_type != MIME_TEXT_HTML &&
 524             mimeinfo->mime_type != MIME_TEXT_ENRICHED) {
 525                 gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 526         } else {
 527                 if (!mimeinfo->main &&
 528                     mimeinfo->parent &&
 529                     mimeinfo->parent->children != mimeinfo)
 530                         gtk_stext_insert(text, NULL, NULL, NULL, buf, -1);
 531                 else
 532                         gtk_stext_insert(text, NULL, NULL, NULL, "\n", 1);
 533                 if (prefs_common.force_charset)
 534                         charset = prefs_common.force_charset;
 535                 else if (mimeinfo->charset)
 536                         charset = mimeinfo->charset;
 537                 textview_write_body(textview, mimeinfo, fp, charset);
 538         }
 539
 540         gtk_stext_thaw(text);
 541 }
 542
 543 static void textview_add_parts(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 544 {
 545         gint level;
 546
 547         g_return_if_fail(mimeinfo != NULL);
 548         g_return_if_fail(fp != NULL);
 549
 550         level = mimeinfo->level;
 551
 552         for (;;) {
 553                 textview_add_part(textview, mimeinfo, fp);
 554                 if (mimeinfo->parent && mimeinfo->parent->content_type &&
 555                     !strcasecmp(mimeinfo->parent->content_type,
 556                                 "multipart/alternative"))
 557                         mimeinfo = mimeinfo->parent->next;
 558                 else
 559                         mimeinfo = procmime_mimeinfo_next(mimeinfo);
 560                 if (!mimeinfo || mimeinfo->level <= level)
 561                         break;
 562         }
 563 }
 564
 565 #define TEXT_INSERT(str) \
 566         gtk_stext_insert(text, textview->msgfont, NULL, NULL, str, -1)
 567
 568 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 569 {
 570         GtkSText *text;
 571
 572         if (!partinfo) return;
 573
 574         textview_set_font(textview, NULL);
 575         text = GTK_STEXT(textview->text);
 576         textview_clear(textview);
 577
 578         gtk_stext_freeze(text);
 579
 580         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 581         TEXT_INSERT(_("right click and select `Save as...', "));
 582         TEXT_INSERT(_("or press `y' key.\n\n"));
 583
 584         TEXT_INSERT(_("To display this part as a text message, select "));
 585         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 586
 587         TEXT_INSERT(_("To display this part as an image, select "));
 588         TEXT_INSERT(_("`Display image', or press `i' key.\n\n"));
 589
 590         TEXT_INSERT(_("To open this part with external program, select "));
 591         TEXT_INSERT(_("`Open' or `Open with...', "));
 592         TEXT_INSERT(_("or double-click, or click the center button, "));
 593         TEXT_INSERT(_("or press `l' key."));
 594
 595         gtk_stext_thaw(text);
 596 }
 597
 598 #if USE_GPGME
 599 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 600 {
 601         GtkSText *text;
 602
 603         if (!partinfo) return;
 604
 605         textview_set_font(textview, NULL);
 606         text = GTK_STEXT(textview->text);
 607         textview_clear(textview);
 608
 609         gtk_stext_freeze(text);
 610
 611         if (partinfo->sigstatus_full == NULL) {
 612                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 613                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 614                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 615         } else {
 616                 TEXT_INSERT(partinfo->sigstatus_full);
 617         }
 618
 619         gtk_stext_thaw(text);
 620 }
 621 #endif /* USE_GPGME */
 622
 623 #undef TEXT_INSERT
 624
 625 static void textview_write_body(TextView *textview, MimeInfo *mimeinfo,
 626                                 FILE *fp, const gchar *charset)
 627 {
 628         FILE *tmpfp;
 629         gchar buf[BUFFSIZE];
 630         CodeConverter *conv;
 631
 632         conv = conv_code_converter_new(charset);
 633
 634         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 635
 636         textview->is_in_signature = FALSE;
 637
 638         if (tmpfp) {
 639
 640                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 641                         textview_show_html(textview, tmpfp, conv);
 642                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 643                         textview_show_ertf(textview, tmpfp, conv);
 644                 else
 645                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 646                                 textview_write_line(textview, buf, conv);
 647                 fclose(tmpfp);
 648         }
 649
 650         conv_code_converter_destroy(conv);
 651 }
 652
 653 static void textview_show_html(TextView *textview, FILE *fp,
 654                                CodeConverter *conv)
 655 {
 656         HTMLParser *parser;
 657         gchar *str;
 658         gchar* url = NULL;
 659
 660         parser = html_parser_new(fp, conv);
 661         g_return_if_fail(parser != NULL);
 662
 663         while ((str = html_parse(parser)) != NULL) {
 664                 if (parser->state == HTML_HREF) {
 665                         /* first time : get and copy the URL */
 666                         if (url == NULL) {
 667                                 /* ALF - the sylpheed html parser returns an empty string,
 668                                  * if still inside an <a>, but already parsed past HREF */
 669                                 str = strtok(str, " ");
 670                                 if (str) {
 671                                         url = strdup(str);
 672                                         /* the URL may (or not) be followed by the
 673                                          * referenced text */
 674                                         str = strtok(NULL, "");
 675                                 }
 676                         }
 677                         if (str != NULL) {
 678                                 textview_write_link(textview, url, str, NULL);
 679                         }
 680                 } else {
 681                         if (url != NULL) {
 682                                 free(url);
 683                                 url = NULL;
 684                         }
 685                         textview_write_line(textview, str, NULL);
 686                 }
 687         }
 688
 689         html_parser_destroy(parser);
 690 }
 691
 692 static void textview_show_ertf(TextView *textview, FILE *fp,
 693                                CodeConverter *conv)
 694 {
 695         ERTFParser *parser;
 696         gchar *str;
 697
 698         parser = ertf_parser_new(fp, conv);
 699         g_return_if_fail(parser != NULL);
 700
 701         while ((str = ertf_parse(parser)) != NULL) {
 702                 textview_write_line(textview, str, NULL);
 703         }
 704
 705         ertf_parser_destroy(parser);
 706 }
 707
 708 /* get_uri_part() - retrieves a URI starting from scanpos.
 709                     Returns TRUE if succesful */
 710 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 711                              const gchar **bp, const gchar **ep)
 712 {
 713         const gchar *ep_;
 714
 715         g_return_val_if_fail(start != NULL, FALSE);
 716         g_return_val_if_fail(scanpos != NULL, FALSE);
 717         g_return_val_if_fail(bp != NULL, FALSE);
 718         g_return_val_if_fail(ep != NULL, FALSE);
 719
 720         *bp = scanpos;
 721
 722         /* find end point of URI */
 723         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 724                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 725                         break;
 726         }
 727
 728         /* no punctuation at end of string */
 729
 730         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 731          * should pass some URI type to this function and decide on that whether
 732          * to perform punctuation stripping */
 733
 734 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 735
 736         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 737                 ;
 738
 739 #undef IS_REAL_PUNCT
 740
 741         *ep = ep_;
 742
 743         return TRUE;
 744 }
 745
 746 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 747 {
 748         return g_strndup(bp, ep - bp);
 749 }
 750
 751 /* valid mail address characters */
 752 #define IS_RFC822_CHAR(ch) \
 753         (isascii(ch) && \
 754          (ch) > 32   && \
 755          (ch) != 127 && \
 756          !isspace(ch) && \
 757          !strchr("(),;<>\"", (ch)))
 758
 759 /* alphabet and number within 7bit ASCII */
 760 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 761 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 762
 763 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 764 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 765                                const gchar **bp, const gchar **ep)
 766 {
 767         /* more complex than the uri part because we need to scan back and forward starting from
 768          * the scan position. */
 769         gboolean result = FALSE;
 770         const gchar *bp_ = NULL;
 771         const gchar *ep_ = NULL;
 772
 773         /* the informative part of the email address (describing the name
 774          * of the email address owner) may contain quoted parts. the
 775          * closure stack stores the last encountered quotes. */
 776         gchar closure_stack[128];
 777         gchar *ptr = closure_stack;
 778
 779         g_return_val_if_fail(start != NULL, FALSE);
 780         g_return_val_if_fail(scanpos != NULL, FALSE);
 781         g_return_val_if_fail(bp != NULL, FALSE);
 782         g_return_val_if_fail(ep != NULL, FALSE);
 783
 784         /* scan start of address */
 785         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 786                 ;
 787
 788         /* TODO: should start with an alnum? */
 789         bp_++;
 790         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 791                 ;
 792
 793         if (bp_ != scanpos) {
 794                 /* scan end of address */
 795                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 796                         ;
 797
 798                 /* TODO: really should terminate with an alnum? */
 799                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 800                         ;
 801                 ep_++;
 802
 803                 if (ep_ > scanpos + 1) {
 804                         *ep = ep_;
 805                         *bp = bp_;
 806                         result = TRUE;
 807                 }
 808         }
 809
 810         if (!result) return FALSE;
 811
 812         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 813         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 814                 return FALSE;
 815
 816         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 817         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 818                 return TRUE;
 819
 820 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 821 #define IN_STACK()      (ptr > closure_stack)
 822 /* has underrun check */
 823 #define POP_STACK()     if(IN_STACK()) --ptr
 824 /* has overrun check */
 825 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 826 /* has underrun check */
 827 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 828
 829         ep_++;
 830
 831         /* scan for the informative part. */
 832         for (bp_ -= 2; bp_ >= start; bp_--) {
 833                 /* if closure on the stack keep scanning */
 834                 if (PEEK_STACK() == *bp_) {
 835                         POP_STACK();
 836                         continue;
 837                 }
 838                 if (*bp_ == '\'' || *bp_ == '"') {
 839                         PUSH_STACK(*bp_);
 840                         continue;
 841                 }
 842
 843                 /* if nothing in the closure stack, do the special conditions
 844                  * the following if..else expression simply checks whether
 845                  * a token is acceptable. if not acceptable, the clause
 846                  * should terminate the loop with a 'break' */
 847                 if (!PEEK_STACK()) {
 848                         if (*bp_ == '-'
 849                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 850                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 851                                 /* hyphens are allowed, but only in
 852                                    between alnums */
 853                         } else if (!ispunct(*bp_)) {
 854                                 /* but anything not being a punctiation
 855                                    is ok */
 856                         } else {
 857                                 break; /* anything else is rejected */
 858                         }
 859                 }
 860         }
 861
 862         bp_++;
 863
 864 #undef PEEK_STACK
 865 #undef PUSH_STACK
 866 #undef POP_STACK
 867 #undef IN_STACK
 868 #undef FULL_STACK
 869
 870         /* scan forward (should start with an alnum) */
 871         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 872                 ;
 873
 874         *ep = ep_;
 875         *bp = bp_;
 876
 877         return result;
 878 }
 879
 880 #undef IS_QUOTE
 881 #undef IS_RFC822_CHAR
 882
 883 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 884 {
 885         /* returns a mailto: URI; mailto: is also used to detect the
 886          * uri type later on in the button_pressed signal handler */
 887         gchar *tmp;
 888         gchar *result;
 889
 890         tmp = g_strndup(bp, ep - bp);
 891         result = g_strconcat("mailto:", tmp, NULL);
 892         g_free(tmp);
 893
 894         return result;
 895 }
 896
 897 #define ADD_TXT_POS(bp_, ep_, pti_) \
 898         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 899                 last = last->next; \
 900                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 901                 last->next = NULL; \
 902         } else { \
 903                 g_warning("alloc error scanning URIs\n"); \
 904                 gtk_stext_insert(text, textview->msgfont, fg_color, NULL, \
 905                                 linebuf, -1); \
 906                 return; \
 907         }
 908
 909 /* textview_make_clickable_parts() - colorizes clickable parts */
 910 static void textview_make_clickable_parts(TextView *textview,
 911                                           GdkFont *font,
 912                                           GdkColor *fg_color,
 913                                           GdkColor *uri_color,
 914                                           const gchar *linebuf)
 915 {
 916         /* parse table - in order of priority */
 917         struct table {
 918                 const gchar *needle; /* token */
 919
 920                 /* token search function */
 921                 gchar    *(*search)     (const gchar *haystack,
 922                                          const gchar *needle);
 923                 /* part parsing function */
 924                 gboolean  (*parse)      (const gchar *start,
 925                                          const gchar *scanpos,
 926                                          const gchar **bp_,
 927                                          const gchar **ep_);
 928                 /* part to URI function */
 929                 gchar    *(*build_uri)  (const gchar *bp,
 930                                          const gchar *ep);
 931         };
 932
 933         static struct table parser[] = {
 934                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 935                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 936                 {"www.",     strcasestr, get_uri_part,   make_uri_string},
 937                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 938                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 939                 {"@",        strcasestr, get_email_part, make_email_string}
 940         };
 941         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 942
 943         gint  n;
 944         const gchar *walk, *bp, *ep;
 945
 946         struct txtpos {
 947                 const gchar     *bp, *ep;       /* text position */
 948                 gint             pti;           /* index in parse table */
 949                 struct txtpos   *next;          /* next */
 950         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 951
 952         GtkSText *text = GTK_STEXT(textview->text);
 953
 954         /* parse for clickable parts, and build a list of begin and end positions  */
 955         for (walk = linebuf, n = 0;;) {
 956                 gint last_index = PARSE_ELEMS;
 957                 gchar *scanpos = NULL;
 958
 959                 /* FIXME: this looks phony. scanning for anything in the parse table */
 960                 for (n = 0; n < PARSE_ELEMS; n++) {
 961                         gchar *tmp;
 962
 963                         tmp = parser[n].search(walk, parser[n].needle);
 964                         if (tmp) {
 965                                 if (scanpos == NULL || tmp < scanpos) {
 966                                         scanpos = tmp;
 967                                         last_index = n;
 968                                 }
 969                         }
 970                 }
 971
 972                 if (scanpos) {
 973                         /* check if URI can be parsed */
 974                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 975                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 976                                         ADD_TXT_POS(bp, ep, last_index);
 977                                         walk = ep;
 978                         } else
 979                                 walk = scanpos +
 980                                         strlen(parser[last_index].needle);
 981                 } else
 982                         break;
 983         }
 984
 985         /* colorize this line */
 986         if (head.next) {
 987                 const gchar *normal_text = linebuf;
 988
 989                 /* insert URIs */
 990                 for (last = head.next; last != NULL;
 991                      normal_text = last->ep, last = last->next) {
 992                         RemoteURI *uri;
 993
 994                         uri = g_new(RemoteURI, 1);
 995                         if (last->bp - normal_text > 0)
 996                                 gtk_stext_insert(text, font,
 997                                                 fg_color, NULL,
 998                                                 normal_text,
 999                                                 last->bp - normal_text);
1000                         uri->uri = parser[last->pti].build_uri(last->bp,
1001                                                                last->ep);
1002                         uri->start = gtk_stext_get_point(text);
1003                         gtk_stext_insert(text, font, uri_color,
1004                                         NULL, last->bp, last->ep - last->bp);
1005                         uri->end = gtk_stext_get_point(text);
1006                         textview->uri_list =
1007                                 g_slist_append(textview->uri_list, uri);
1008                 }
1009
1010                 if (*normal_text)
1011                         gtk_stext_insert(text, font, fg_color,
1012                                         NULL, normal_text, -1);
1013         } else
1014                 gtk_stext_insert(text, font, fg_color, NULL, linebuf, -1);
1015 }
1016
1017 #undef ADD_TXT_POS
1018
1019 /* This function writes str as a double-clickable link with the given url. */
1020 static void textview_write_link(TextView *textview, const gchar *url,
1021                                 const gchar *str, CodeConverter *conv)
1022 {
1023     GdkColor *link_color = NULL;
1024     RemoteURI* uri;
1025     GtkSText *text = GTK_STEXT(textview->text);
1026     gchar buf[BUFFSIZE];
1027
1028     /* this part is taken from textview_write_line. Right now the only place
1029      * that calls this function passes NULL for conv, but you never know. */
1030 #if 0
1031     if (!conv)
1032             strncpy2(buf, str, sizeof(buf));
1033     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
1034             gtk_stext_insert(text, textview->msgfont,
1035                             prefs_common.enable_color
1036                             ? &error_color : NULL, NULL,
1037                             "*** Warning: code conversion failed ***\n",
1038                             -1);
1039             return;
1040     }
1041 #endif
1042
1043     if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1044         strncpy2(buf, str, sizeof(buf));
1045
1046     strcrchomp(buf);
1047     gtk_stext_insert(text, textview->msgfont, NULL, NULL, " ", 1);
1048
1049     /* this part is based on the code in make_clickable_parts */
1050     if (prefs_common.enable_color) {
1051         link_color = &uri_color;
1052     }
1053     uri = g_new(RemoteURI, 1);
1054     uri->uri = g_strdup(url);
1055     uri->start = gtk_stext_get_point(text);
1056     gtk_stext_insert(text, textview->msgfont, link_color, NULL, str,
1057                     strlen(str));
1058     uri->end = gtk_stext_get_point(text);
1059     textview->uri_list = g_slist_append(textview->uri_list, uri);
1060 }
1061
1062 static void textview_write_line(TextView *textview, const gchar *str,
1063                                 CodeConverter *conv)
1064 {
1065         GtkSText *text = GTK_STEXT(textview->text);
1066         gchar buf[BUFFSIZE];
1067         GdkColor *fg_color;
1068         gint quotelevel = -1;
1069
1070 #if 0
1071         if (!conv)
1072                 strncpy2(buf, str, sizeof(buf));
1073         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
1074                 gtk_stext_insert(text, textview->msgfont,
1075                                 prefs_common.enable_color
1076                                 ? &error_color : NULL, NULL,
1077                                 "*** Warning: code conversion failed ***\n",
1078                                 -1);
1079                 return;
1080         }
1081 #endif
1082         if (!conv || conv_convert(conv, buf, sizeof(buf), str) < 0)
1083                 strncpy2(buf, str, sizeof(buf));
1084
1085         strcrchomp(buf);
1086         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
1087         fg_color = NULL;
1088
1089         /* change color of quotation
1090            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
1091            Up to 3 levels of quotations are detected, and each
1092            level is colored using a different color. */
1093         if (prefs_common.enable_color
1094             && line_has_quote_char(buf, prefs_common.quote_chars)) {
1095                 quotelevel = get_quote_level(buf, prefs_common.quote_chars);
1096
1097                 /* set up the correct foreground color */
1098                 if (quotelevel > 2) {
1099                         /* recycle colors */
1100                         if (prefs_common.recycle_quote_colors)
1101                                 quotelevel %= 3;
1102                         else
1103                                 quotelevel = 2;
1104                 }
1105         }
1106
1107         if (quotelevel == -1)
1108                 fg_color = NULL;
1109         else
1110                 fg_color = &quote_colors[quotelevel];
1111
1112         if (prefs_common.enable_color && (strcmp(buf,"-- \n") == 0 || textview->is_in_signature)) {
1113                 fg_color = &signature_color;
1114                 textview->is_in_signature = TRUE;
1115         }
1116
1117         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
1118                 gtk_stext_insert(text, spacingfont, NULL, NULL, " ", 1);
1119
1120         if (prefs_common.enable_color)
1121                 textview_make_clickable_parts(textview, textview->msgfont,
1122                                               fg_color, &uri_color, buf);
1123         else
1124                 textview_make_clickable_parts(textview, textview->msgfont,
1125                                               fg_color, NULL, buf);
1126 }
1127
1128 void textview_clear(TextView *textview)
1129 {
1130         GtkSText *text = GTK_STEXT(textview->text);
1131
1132         gtk_stext_freeze(text);
1133         gtk_stext_set_point(text, 0);
1134         gtk_stext_forward_delete(text, gtk_stext_get_length(text));
1135         gtk_stext_thaw(text);
1136
1137         textview_uri_list_remove_all(textview->uri_list);
1138         textview->uri_list = NULL;
1139
1140         textview->body_pos = 0;
1141         textview->cur_pos  = 0;
1142 }
1143
1144 void textview_destroy(TextView *textview)
1145 {
1146         textview_uri_list_remove_all(textview->uri_list);
1147         textview->uri_list = NULL;
1148
1149         if (!textview->scrolledwin_sb->parent)
1150                 gtk_widget_destroy(textview->scrolledwin_sb);
1151         if (!textview->scrolledwin_mb->parent)
1152                 gtk_widget_destroy(textview->scrolledwin_mb);
1153
1154         if (textview->msgfont)
1155                 gdk_font_unref(textview->msgfont);
1156         if (textview->boldfont)
1157                 gdk_font_unref(textview->boldfont);
1158
1159         g_free(textview);
1160 }
1161
1162 void textview_set_all_headers(TextView *textview, gboolean all_headers)
1163 {
1164         textview->show_all_headers = all_headers;
1165 }
1166
1167 void textview_set_font(TextView *textview, const gchar *codeset)
1168 {
1169         gboolean use_fontset = TRUE;
1170
1171         /* In multi-byte mode, GtkSText can't display 8bit characters
1172            correctly, so it must be single-byte mode. */
1173         if (MB_CUR_MAX > 1) {
1174                 if (codeset) {
1175                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
1176                             !g_strcasecmp(codeset, "BALTIC"))
1177                                 use_fontset = FALSE;
1178                         else if (conv_get_current_charset() != C_EUC_JP &&
1179                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
1180                                   !g_strncasecmp(codeset, "CP", 2)    ||
1181                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
1182                                 use_fontset = FALSE;
1183                 }
1184         } else
1185                 use_fontset = FALSE;
1186
1187         if (textview->text_is_mb && !use_fontset) {
1188                 GtkWidget *parent;
1189
1190                 parent = textview->scrolledwin_mb->parent;
1191                 gtkut_container_remove(GTK_CONTAINER(parent),
1192                                        textview->scrolledwin_mb);
1193                 gtk_container_add(GTK_CONTAINER(parent),
1194                                   textview->scrolledwin_sb);
1195
1196                 textview->text = textview->text_sb;
1197                 textview->text_is_mb = FALSE;
1198         } else if (!textview->text_is_mb && use_fontset) {
1199                 GtkWidget *parent;
1200
1201                 parent = textview->scrolledwin_sb->parent;
1202                 gtkut_container_remove(GTK_CONTAINER(parent),
1203                                        textview->scrolledwin_sb);
1204                 gtk_container_add(GTK_CONTAINER(parent),
1205                                   textview->scrolledwin_mb);
1206
1207                 textview->text = textview->text_mb;
1208                 textview->text_is_mb = TRUE;
1209         }
1210
1211         if (prefs_common.textfont) {
1212                 GdkFont *font;
1213
1214                 if (use_fontset) {
1215                         if (text_mb_font) {
1216                                 text_mb_font->ascent = text_mb_font_orig_ascent;
1217                                 text_mb_font->descent = text_mb_font_orig_descent;
1218                         }
1219                         font = gdk_fontset_load(prefs_common.textfont);
1220                         if (font && text_mb_font != font) {
1221                                 if (text_mb_font)
1222                                         gdk_font_unref(text_mb_font);
1223                                 text_mb_font = font;
1224                                 text_mb_font_orig_ascent = font->ascent;
1225                                 text_mb_font_orig_descent = font->descent;
1226                         }
1227                 } else {
1228                         if (text_sb_font) {
1229                                 text_sb_font->ascent = text_sb_font_orig_ascent;
1230                                 text_sb_font->descent = text_sb_font_orig_descent;
1231                         }
1232                         if (MB_CUR_MAX > 1) {
1233                                 FONT_LOAD(font, "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
1234                         } else {
1235                                 FONT_LOAD(font, prefs_common.textfont);
1236                         }
1237                         if (font && text_sb_font != font) {
1238                                 if (text_sb_font)
1239                                         gdk_font_unref(text_sb_font);
1240                                 text_sb_font = font;
1241                                 text_sb_font_orig_ascent = font->ascent;
1242                                 text_sb_font_orig_descent = font->descent;
1243                         }
1244                 }
1245
1246                 if (font) {
1247                         gint ascent, descent;
1248
1249                         descent = prefs_common.line_space / 2;
1250                         ascent  = prefs_common.line_space - descent;
1251                         font->ascent  += ascent;
1252                         font->descent += descent;
1253
1254                         if (textview->msgfont)
1255                                 gdk_font_unref(textview->msgfont);
1256                         textview->msgfont = font;
1257                         gdk_font_ref(font);
1258                 }
1259         }
1260
1261         if (!textview->boldfont && prefs_common.boldfont)
1262                 FONT_LOAD(textview->boldfont, prefs_common.boldfont);
1263         if (!spacingfont)
1264                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1265 }
1266
1267 enum
1268 {
1269         H_DATE          = 0,
1270         H_FROM          = 1,
1271         H_TO            = 2,
1272         H_NEWSGROUPS    = 3,
1273         H_SUBJECT       = 4,
1274         H_CC            = 5,
1275         H_REPLY_TO      = 6,
1276         H_FOLLOWUP_TO   = 7,
1277         H_X_MAILER      = 8,
1278         H_X_NEWSREADER  = 9,
1279         H_USER_AGENT    = 10,
1280         H_ORGANIZATION  = 11,
1281 };
1282
1283 void textview_set_position(TextView *textview, gint pos)
1284 {
1285         if (pos < 0) {
1286                 textview->cur_pos =
1287                         gtk_stext_get_length(GTK_STEXT(textview->text));
1288         } else {
1289                 textview->cur_pos = pos;
1290         }
1291 }
1292
1293 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1294 {
1295         gchar buf[BUFFSIZE];
1296         GPtrArray *headers, *sorted_headers;
1297         GSList *disphdr_list;
1298         Header *header;
1299         gint i;
1300
1301         g_return_val_if_fail(fp != NULL, NULL);
1302
1303         if (textview->show_all_headers)
1304                 return procheader_get_header_array_asis(fp);
1305
1306         if (!prefs_common.display_header) {
1307                 while (fgets(buf, sizeof(buf), fp) != NULL)
1308                         if (buf[0] == '\r' || buf[0] == '\n') break;
1309                 return NULL;
1310         }
1311
1312         headers = procheader_get_header_array_asis(fp);
1313
1314         sorted_headers = g_ptr_array_new();
1315
1316         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1317              disphdr_list = disphdr_list->next) {
1318                 DisplayHeaderProp *dp =
1319                         (DisplayHeaderProp *)disphdr_list->data;
1320
1321                 for (i = 0; i < headers->len; i++) {
1322                         header = g_ptr_array_index(headers, i);
1323
1324                         if (procheader_headername_equal(header->name,
1325                                                         dp->name)) {
1326                                 if (dp->hidden)
1327                                         procheader_header_free(header);
1328                                 else
1329                                         g_ptr_array_add(sorted_headers, header);
1330
1331                                 g_ptr_array_remove_index(headers, i);
1332                                 i--;
1333                         }
1334                 }
1335         }
1336
1337         if (prefs_common.show_other_header) {
1338                 for (i = 0; i < headers->len; i++) {
1339                         header = g_ptr_array_index(headers, i);
1340                         g_ptr_array_add(sorted_headers, header);
1341                 }
1342                 g_ptr_array_free(headers, TRUE);
1343         } else
1344                 procheader_header_array_destroy(headers);
1345
1346
1347         return sorted_headers;
1348 }
1349
1350 static void textview_show_header(TextView *textview, GPtrArray *headers)
1351 {
1352         GtkSText *text = GTK_STEXT(textview->text);
1353         Header *header;
1354         gint i;
1355
1356         g_return_if_fail(headers != NULL);
1357
1358         gtk_stext_freeze(text);
1359
1360         for (i = 0; i < headers->len; i++) {
1361                 header = g_ptr_array_index(headers, i);
1362                 g_return_if_fail(header->name != NULL);
1363
1364                 gtk_stext_insert(text, textview->boldfont, NULL, NULL,
1365                                 header->name, -1);
1366                 if (header->name[strlen(header->name) - 1] != ' ')
1367                         gtk_stext_insert(text, textview->boldfont,
1368                                         NULL, NULL, " ", 1);
1369
1370                 if (procheader_headername_equal(header->name, "Subject") ||
1371                     procheader_headername_equal(header->name, "From")    ||
1372                     procheader_headername_equal(header->name, "To")      ||
1373                     procheader_headername_equal(header->name, "Cc"))
1374                         unfold_line(header->body);
1375
1376                 if (prefs_common.enable_color &&
1377                     (procheader_headername_equal(header->name, "X-Mailer") ||
1378                      procheader_headername_equal(header->name,
1379                                                  "X-Newsreader")) &&
1380                     strstr(header->body, "Sylpheed") != NULL)
1381                         gtk_stext_insert(text, NULL, &emphasis_color, NULL,
1382                                         header->body, -1);
1383                 else if (prefs_common.enable_color) {
1384                         textview_make_clickable_parts(textview,
1385                                                       NULL, NULL, &uri_color,
1386                                                       header->body);
1387                 } else {
1388                         textview_make_clickable_parts(textview,
1389                                                       NULL, NULL, NULL,
1390                                                       header->body);
1391                 }
1392                 gtk_stext_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1393         }
1394
1395         gtk_stext_thaw(text);
1396 }
1397
1398 gboolean textview_search_string(TextView *textview, const gchar *str,
1399                                 gboolean case_sens)
1400 {
1401         GtkSText *text = GTK_STEXT(textview->text);
1402         gint pos;
1403         wchar_t *wcs;
1404         gint len;
1405         gint text_len;
1406         gboolean found = FALSE;
1407
1408         g_return_val_if_fail(str != NULL, FALSE);
1409
1410         wcs = strdup_mbstowcs(str);
1411         g_return_val_if_fail(wcs != NULL, FALSE);
1412         len = wcslen(wcs);
1413         pos = textview->cur_pos;
1414         if (pos < textview->body_pos)
1415                 pos = textview->body_pos;
1416         text_len = gtk_stext_get_length(text);
1417         if (text_len - pos < len) {
1418                 g_free(wcs);
1419                 return FALSE;
1420         }
1421
1422         for (; pos < text_len; pos++) {
1423                 if (text_len - pos < len) break;
1424                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1425                     == TRUE) {
1426                         gtk_widget_hide(GTK_WIDGET(textview->scrolledwin));
1427                         gtk_editable_set_position(GTK_EDITABLE(text),
1428                                                   pos + len);
1429                         gtk_editable_select_region(GTK_EDITABLE(text),
1430                                                    pos, pos + len);
1431                         gtk_widget_show(GTK_WIDGET(textview->scrolledwin));
1432                         textview_set_position(textview, pos + len);
1433                         found = TRUE;
1434                         break;
1435                 }
1436                 if (text_len - pos == len) break;
1437         }
1438         g_free(wcs);
1439         return found;
1440 }
1441
1442 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1443                                          gboolean case_sens)
1444 {
1445         GtkSText *text = GTK_STEXT(textview->text);
1446         gint pos;
1447         wchar_t *wcs;
1448         gint len;
1449         gint text_len;
1450         gboolean found = FALSE;
1451
1452         g_return_val_if_fail(str != NULL, FALSE);
1453
1454         wcs = strdup_mbstowcs(str);
1455         g_return_val_if_fail(wcs != NULL, FALSE);
1456         len = wcslen(wcs);
1457         pos = textview->cur_pos;
1458         text_len = gtk_stext_get_length(text);
1459         if (text_len - textview->body_pos < len) {
1460                 g_free(wcs);
1461                 return FALSE;
1462         }
1463         if (pos <= textview->body_pos || text_len - pos < len)
1464                 pos = text_len - len;
1465
1466         for (; pos >= textview->body_pos; pos--) {
1467                 if (gtkut_stext_match_string(text, pos, wcs, len, case_sens)
1468                     == TRUE) {
1469                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1470                         gtk_editable_select_region(GTK_EDITABLE(text),
1471                                                    pos, pos + len);
1472                         textview_set_position(textview, pos - 1);
1473                         found = TRUE;
1474                         break;
1475                 }
1476                 if (pos == textview->body_pos) break;
1477         }
1478
1479         g_free(wcs);
1480         return found;
1481 }
1482
1483 void textview_scroll_one_line(TextView *textview, gboolean up)
1484 {
1485         GtkSText *text = GTK_STEXT(textview->text);
1486         gfloat upper;
1487
1488         if (prefs_common.enable_smooth_scroll) {
1489                 textview_smooth_scroll_one_line(textview, up);
1490                 return;
1491         }
1492
1493         if (!up) {
1494                 upper = text->vadj->upper - text->vadj->page_size;
1495                 if (text->vadj->value < upper) {
1496                         text->vadj->value +=
1497                                 text->vadj->step_increment * 4;
1498                         text->vadj->value =
1499                                 MIN(text->vadj->value, upper);
1500                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1501                                                 "value_changed");
1502                 }
1503         } else {
1504                 if (text->vadj->value > 0.0) {
1505                         text->vadj->value -=
1506                                 text->vadj->step_increment * 4;
1507                         text->vadj->value =
1508                                 MAX(text->vadj->value, 0.0);
1509                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1510                                                 "value_changed");
1511                 }
1512         }
1513 }
1514
1515 gboolean textview_scroll_page(TextView *textview, gboolean up)
1516 {
1517         GtkSText *text = GTK_STEXT(textview->text);
1518         gfloat upper;
1519         gfloat page_incr;
1520
1521         if (prefs_common.enable_smooth_scroll)
1522                 return textview_smooth_scroll_page(textview, up);
1523
1524         if (prefs_common.scroll_halfpage)
1525                 page_incr = text->vadj->page_increment / 2;
1526         else
1527                 page_incr = text->vadj->page_increment;
1528
1529         if (!up) {
1530                 upper = text->vadj->upper - text->vadj->page_size;
1531                 if (text->vadj->value < upper) {
1532                         text->vadj->value += page_incr;
1533                         text->vadj->value = MIN(text->vadj->value, upper);
1534                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1535                                                 "value_changed");
1536                 } else
1537                         return FALSE;
1538         } else {
1539                 if (text->vadj->value > 0.0) {
1540                         text->vadj->value -= page_incr;
1541                         text->vadj->value = MAX(text->vadj->value, 0.0);
1542                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1543                                                 "value_changed");
1544                 } else
1545                         return FALSE;
1546         }
1547
1548         return TRUE;
1549 }
1550
1551 static void textview_smooth_scroll_do(TextView *textview,
1552                                       gfloat old_value, gfloat last_value,
1553                                       gint step)
1554 {
1555         GtkSText *text = GTK_STEXT(textview->text);
1556         gint change_value;
1557         gboolean up;
1558         gint i;
1559
1560         if (old_value < last_value) {
1561                 change_value = last_value - old_value;
1562                 up = FALSE;
1563         } else {
1564                 change_value = old_value - last_value;
1565                 up = TRUE;
1566         }
1567
1568         gdk_key_repeat_disable();
1569
1570         for (i = step; i <= change_value; i += step) {
1571                 text->vadj->value = old_value + (up ? -i : i);
1572                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1573                                         "value_changed");
1574         }
1575
1576         text->vadj->value = last_value;
1577         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1578
1579         gdk_key_repeat_restore();
1580 }
1581
1582 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1583 {
1584         GtkSText *text = GTK_STEXT(textview->text);
1585         gfloat upper;
1586         gfloat old_value;
1587         gfloat last_value;
1588
1589         if (!up) {
1590                 upper = text->vadj->upper - text->vadj->page_size;
1591                 if (text->vadj->value < upper) {
1592                         old_value = text->vadj->value;
1593                         last_value = text->vadj->value +
1594                                 text->vadj->step_increment * 4;
1595                         last_value = MIN(last_value, upper);
1596
1597                         textview_smooth_scroll_do(textview, old_value,
1598                                                   last_value,
1599                                                   prefs_common.scroll_step);
1600                 }
1601         } else {
1602                 if (text->vadj->value > 0.0) {
1603                         old_value = text->vadj->value;
1604                         last_value = text->vadj->value -
1605                                 text->vadj->step_increment * 4;
1606                         last_value = MAX(last_value, 0.0);
1607
1608                         textview_smooth_scroll_do(textview, old_value,
1609                                                   last_value,
1610                                                   prefs_common.scroll_step);
1611                 }
1612         }
1613 }
1614
1615 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1616 {
1617         GtkSText *text = GTK_STEXT(textview->text);
1618         gfloat upper;
1619         gfloat page_incr;
1620         gfloat old_value;
1621         gfloat last_value;
1622
1623         if (prefs_common.scroll_halfpage)
1624                 page_incr = text->vadj->page_increment / 2;
1625         else
1626                 page_incr = text->vadj->page_increment;
1627
1628         if (!up) {
1629                 upper = text->vadj->upper - text->vadj->page_size;
1630                 if (text->vadj->value < upper) {
1631                         old_value = text->vadj->value;
1632                         last_value = text->vadj->value + page_incr;
1633                         last_value = MIN(last_value, upper);
1634
1635                         textview_smooth_scroll_do(textview, old_value,
1636                                                   last_value,
1637                                                   prefs_common.scroll_step);
1638                 } else
1639                         return FALSE;
1640         } else {
1641                 if (text->vadj->value > 0.0) {
1642                         old_value = text->vadj->value;
1643                         last_value = text->vadj->value - page_incr;
1644                         last_value = MAX(last_value, 0.0);
1645
1646                         textview_smooth_scroll_do(textview, old_value,
1647                                                   last_value,
1648                                                   prefs_common.scroll_step);
1649                 } else
1650                         return FALSE;
1651         }
1652
1653         return TRUE;
1654 }
1655
1656 #define KEY_PRESS_EVENT_STOP() \
1657         if (gtk_signal_n_emissions_by_name \
1658                 (GTK_OBJECT(widget), "key_press_event") > 0) { \
1659                 gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), \
1660                                              "key_press_event"); \
1661         }
1662
1663 static gint textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1664                                  TextView *textview)
1665 {
1666         SummaryView *summaryview = NULL;
1667         MessageView *messageview = textview->messageview;
1668
1669         if (!event) return FALSE;
1670         if (messageview->mainwin)
1671                 summaryview = messageview->mainwin->summaryview;
1672
1673         switch (event->keyval) {
1674         case GDK_Tab:
1675         case GDK_Home:
1676         case GDK_Left:
1677         case GDK_Up:
1678         case GDK_Right:
1679         case GDK_Down:
1680         case GDK_Page_Up:
1681         case GDK_Page_Down:
1682         case GDK_End:
1683         case GDK_Control_L:
1684         case GDK_Control_R:
1685                 break;
1686         case GDK_space:
1687                 if (summaryview)
1688                         summary_pass_key_press_event(summaryview, event);
1689                 else
1690                         textview_scroll_page(textview, FALSE);
1691                 break;
1692         case GDK_BackSpace:
1693                 textview_scroll_page(textview, TRUE);
1694                 break;
1695         case GDK_Return:
1696                 textview_scroll_one_line(textview,
1697                                          (event->state & GDK_MOD1_MASK) != 0);
1698                 break;
1699         case GDK_Delete:
1700                 if (summaryview)
1701                         summary_pass_key_press_event(summaryview, event);
1702                 break;
1703         case GDK_n:
1704         case GDK_N:
1705         case GDK_p:
1706         case GDK_P:
1707         case GDK_y:
1708         case GDK_t:
1709         case GDK_l:
1710                 if (messageview->type == MVIEW_MIME &&
1711                     textview == messageview->mimeview->textview) {
1712                         KEY_PRESS_EVENT_STOP();
1713                         mimeview_pass_key_press_event(messageview->mimeview,
1714                                                       event);
1715                         break;
1716                 }
1717                 /* fall through */
1718         default:
1719                 if (summaryview &&
1720                     event->window != messageview->mainwin->window->window) {
1721                         GdkEventKey tmpev = *event;
1722
1723                         tmpev.window = messageview->mainwin->window->window;
1724                         KEY_PRESS_EVENT_STOP();
1725                         gtk_widget_event(messageview->mainwin->window,
1726                                          (GdkEvent *)&tmpev);
1727                 }
1728                 break;
1729         }
1730
1731         return TRUE;
1732 }
1733
1734 static gint show_url_timeout_cb(gpointer data)
1735 {
1736         TextView *textview = (TextView *)data;
1737
1738         if (textview->messageview->mainwin)
1739                 if (textview->show_url_msgid)
1740                         gtk_statusbar_remove(GTK_STATUSBAR(
1741                                 textview->messageview->mainwin->statusbar),
1742                                 textview->messageview->mainwin->folderview_cid,
1743                                 textview->show_url_msgid);
1744                 return FALSE;
1745 }
1746
1747 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1748                                     TextView *textview)
1749 {
1750         if (event)
1751                 textview->last_buttonpress = event->type;
1752         return FALSE;
1753 }
1754
1755 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1756                                     TextView *textview)
1757 {
1758         textview->cur_pos =
1759                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1760
1761         if (event &&
1762             ((event->button == 1)
1763              || event->button == 2 || event->button == 3)) {
1764                 GSList *cur;
1765
1766                 /* double click seems to set the cursor after the current
1767                  * word. The cursor position needs fixing, otherwise the
1768                  * last word of a clickable zone will not work */
1769                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1770                         textview->cur_pos--;
1771                 }
1772
1773                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1774                         RemoteURI *uri = (RemoteURI *)cur->data;
1775
1776                         if (textview->cur_pos >= uri->start &&
1777                             textview->cur_pos <  uri->end) {
1778                                 /* single click: display url in statusbar */
1779                                 if (event->button == 1 && textview->last_buttonpress != GDK_2BUTTON_PRESS) {
1780                                         if (textview->messageview->mainwin) {
1781                                                 if (textview->show_url_msgid) {
1782                                                         gtk_timeout_remove(textview->show_url_timeout_tag);
1783                                                         gtk_statusbar_remove(GTK_STATUSBAR(
1784                                                                 textview->messageview->mainwin->statusbar),
1785                                                                 textview->messageview->mainwin->folderview_cid,
1786                                                                 textview->show_url_msgid);
1787                                                         textview->show_url_msgid = 0;
1788                                                 }
1789                                                 textview->show_url_msgid = gtk_statusbar_push(
1790                                                                 GTK_STATUSBAR(textview->messageview->mainwin->statusbar),
1791                                                                 textview->messageview->mainwin->folderview_cid,
1792                                                                 uri->uri);
1793                                                 textview->show_url_timeout_tag = gtk_timeout_add( 4000, show_url_timeout_cb, textview );
1794                                                 gtkut_widget_wait_for_draw(textview->messageview->mainwin->hbox_stat);
1795                                         }
1796                                 } else
1797                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1798                                         if (event->button == 3) {
1799                                                 gchar *fromname, *fromaddress;
1800
1801                                                 /* extract url */
1802                                                 fromaddress = g_strdup(uri->uri + 7);
1803                                                 /* Hiroyuki: please put this function in utils.c! */
1804                                                 fromname = procheader_get_fromname(fromaddress);
1805                                                 extract_address(fromaddress);
1806                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1807                                                 /* Add to address book - Match */
1808                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1809
1810                                                 g_free(fromaddress);
1811                                                 g_free(fromname);
1812                                         } else {
1813                                                 PrefsAccount *account = NULL;
1814                                                 FolderItem   *folder_item;
1815
1816                                                 if (textview->messageview && textview->messageview->mainwin
1817                                                 &&  textview->messageview->mainwin->summaryview
1818                                                 &&  textview->messageview->mainwin->summaryview->folder_item) {
1819                                                         folder_item = textview->messageview->mainwin->summaryview->folder_item;
1820                                                         if (folder_item->prefs && folder_item->prefs->enable_default_account)
1821                                                                 account = account_find_from_id(folder_item->prefs->default_account);
1822                                                 }
1823                                                 compose_new(account, uri->uri + 7, NULL);
1824                                         }
1825                                 } else
1826 #if USE_GPGME
1827                                 if (!g_strncasecmp(uri->uri, "pgp:", 4)) {
1828                                         GtkAdjustment *pos = gtk_scrolled_window_get_vadjustment(
1829                                                                 GTK_SCROLLED_WINDOW(textview->scrolledwin));
1830                                         gfloat vpos = pos->value;
1831                                         mimeview_check_signature(textview->messageview->mimeview);
1832                                         /* scroll back where we were */
1833                                         gtk_adjustment_set_value(pos, vpos);
1834                                 } else
1835 #endif
1836                                 {
1837                                         open_uri(uri->uri,
1838                                                  prefs_common.uri_cmd);
1839                                 }
1840                         }
1841                 }
1842         }
1843         if (event)
1844                 textview->last_buttonpress = event->type;
1845         return FALSE;
1846 }
1847
1848 static void textview_uri_list_remove_all(GSList *uri_list)
1849 {
1850         GSList *cur;
1851
1852         for (cur = uri_list; cur != NULL; cur = cur->next) {
1853                 if (cur->data) {
1854                         g_free(((RemoteURI *)cur->data)->uri);
1855                         g_free(cur->data);
1856                 }
1857         }
1858
1859         g_slist_free(uri_list);
1860 }