src/textview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 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/gtktext.h>
  32 #include <gtk/gtksignal.h>
  33 #include <stdio.h>
  34 #include <ctype.h>
  35 #include <string.h>
  36 #include <stdlib.h>
  37
  38 #include "intl.h"
  39 #include "main.h"
  40 #include "summaryview.h"
  41 #include "procheader.h"
  42 #include "prefs_common.h"
  43 #include "codeconv.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
  53 #define FONT_LOAD(font, s) \
  54 { \
  55         gchar *fontstr, *p; \
  56  \
  57         Xstrdup_a(fontstr, s, ); \
  58         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  59         font = gdk_font_load(fontstr); \
  60 }
  61
  62 typedef struct _RemoteURI       RemoteURI;
  63
  64 struct _RemoteURI
  65 {
  66         gchar *uri;
  67
  68         guint start;
  69         guint end;
  70 };
  71
  72 static GdkColor quote_colors[3] = {
  73         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  74         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  75         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  76 };
  77
  78 static GdkColor uri_color = {
  79         (gulong)0,
  80         (gushort)0,
  81         (gushort)0,
  82         (gushort)0
  83 };
  84
  85 static GdkColor emphasis_color = {
  86         (gulong)0,
  87         (gushort)0,
  88         (gushort)0,
  89         (gushort)0xcfff
  90 };
  91
  92 static GdkColor error_color = {
  93         (gulong)0,
  94         (gushort)0xefff,
  95         (gushort)0,
  96         (gushort)0
  97 };
  98
  99 static GdkFont *spacingfont;
 100
 101 static void textview_show_ertf          (TextView       *textview,
 102                                          FILE           *fp,
 103                                          CodeConverter  *conv);
 104 static void textview_show_html          (TextView       *textview,
 105                                          FILE           *fp,
 106                                          CodeConverter  *conv);
 107 static void textview_write_line         (TextView       *textview,
 108                                          const gchar    *str,
 109                                          CodeConverter  *conv);
 110 static void textview_write_link         (TextView       *textview,
 111                                          const gchar    *url,
 112                                          const gchar    *str,
 113                                          CodeConverter  *conv);
 114 static GPtrArray *textview_scan_header  (TextView       *textview,
 115                                          FILE           *fp);
 116 static void textview_show_header        (TextView       *textview,
 117                                          GPtrArray      *headers);
 118
 119 static void textview_key_pressed        (GtkWidget      *widget,
 120                                          GdkEventKey    *event,
 121                                          TextView       *textview);
 122 static void textview_button_pressed     (GtkWidget      *widget,
 123                                          GdkEventButton *event,
 124                                          TextView       *textview);
 125
 126 static void textview_uri_list_remove_all(GSList         *uri_list);
 127
 128 static void textview_smooth_scroll_do           (TextView       *textview,
 129                                                  gfloat          old_value,
 130                                                  gfloat          last_value,
 131                                                  gint            step);
 132 static void textview_smooth_scroll_one_line     (TextView       *textview,
 133                                                  gboolean        up);
 134 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 135                                                  gboolean        up);
 136
 137
 138 TextView *textview_create(void)
 139 {
 140         TextView *textview;
 141         GtkWidget *vbox;
 142         GtkWidget *scrolledwin_sb;
 143         GtkWidget *scrolledwin_mb;
 144         GtkWidget *text_sb;
 145         GtkWidget *text_mb;
 146
 147         debug_print(_("Creating text view...\n"));
 148         textview = g_new0(TextView, 1);
 149
 150         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 151         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 152         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 153                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 154         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 155                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 156         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 157         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 158
 159         /* create GtkText widgets for single-byte and multi-byte character */
 160         text_sb = gtk_text_new(NULL, NULL);
 161         text_mb = gtk_text_new(NULL, NULL);
 162         GTK_TEXT(text_sb)->default_tab_width = 8;
 163         GTK_TEXT(text_mb)->default_tab_width = 8;
 164         gtk_widget_show(text_sb);
 165         gtk_widget_show(text_mb);
 166         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 167         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 168         gtk_widget_ensure_style(text_sb);
 169         gtk_widget_ensure_style(text_mb);
 170         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 171                 GtkStyle *style;
 172
 173                 style = gtk_style_copy(text_sb->style);
 174                 gdk_font_unref(style->font);
 175                 FONT_LOAD(style->font, NORMAL_FONT);
 176                 gtk_widget_set_style(text_sb, style);
 177         }
 178         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 179                 GtkStyle *style;
 180
 181                 style = gtk_style_copy(text_mb->style);
 182                 gdk_font_unref(style->font);
 183                 style->font = gdk_fontset_load(NORMAL_FONT);
 184                 gtk_widget_set_style(text_mb, style);
 185         }
 186         gtk_widget_ref(scrolledwin_sb);
 187         gtk_widget_ref(scrolledwin_mb);
 188
 189         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 190         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 191         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 192                            GTK_SIGNAL_FUNC(textview_key_pressed),
 193                            textview);
 194         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 195                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 196                                  textview);
 197         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 198                            GTK_SIGNAL_FUNC(textview_key_pressed),
 199                            textview);
 200         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 201                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 202                                  textview);
 203
 204         gtk_widget_show(scrolledwin_sb);
 205         gtk_widget_show(scrolledwin_mb);
 206
 207         vbox = gtk_vbox_new(FALSE, 0);
 208         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 209
 210         textview->vbox           = vbox;
 211         textview->scrolledwin    = scrolledwin_sb;
 212         textview->scrolledwin_sb = scrolledwin_sb;
 213         textview->scrolledwin_mb = scrolledwin_mb;
 214         textview->text           = text_sb;
 215         textview->text_sb        = text_sb;
 216         textview->text_mb        = text_mb;
 217         textview->text_is_mb     = FALSE;
 218         textview->uri_list       = NULL;
 219         textview->body_pos       = 0;
 220         textview->cur_pos        = 0;
 221
 222         return textview;
 223 }
 224
 225 void textview_init(TextView *textview)
 226 {
 227         gtkut_widget_disable_theme_engine(textview->text_sb);
 228         gtkut_widget_disable_theme_engine(textview->text_mb);
 229         textview_update_message_colors();
 230         textview_set_font(textview, NULL);
 231 }
 232
 233 void textview_update_message_colors(void)
 234 {
 235         GdkColor black = {0, 0, 0, 0};
 236
 237         if (prefs_common.enable_color) {
 238                 /* grab the quote colors, converting from an int to a GdkColor */
 239                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 240                                                &quote_colors[0]);
 241                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 242                                                &quote_colors[1]);
 243                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 244                                                &quote_colors[2]);
 245                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 246                                                &uri_color);
 247         } else {
 248                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 249                         uri_color = emphasis_color = black;
 250         }
 251 }
 252
 253 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 254                            const gchar *file)
 255 {
 256         FILE *fp;
 257
 258         if ((fp = fopen(file, "r")) == NULL) {
 259                 FILE_OP_ERROR(file, "fopen");
 260                 return;
 261         }
 262
 263         textview_show_part(textview, mimeinfo, fp);
 264
 265         fclose(fp);
 266 }
 267
 268 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 269 {
 270         GtkText *text;
 271         gchar buf[BUFFSIZE];
 272         const gchar *boundary = NULL;
 273         gint boundary_len = 0;
 274         const gchar *charset = NULL;
 275         FILE *tmpfp;
 276         GPtrArray *headers = NULL;
 277         CodeConverter *conv;
 278
 279         g_return_if_fail(mimeinfo != NULL);
 280         g_return_if_fail(fp != NULL);
 281
 282         if (mimeinfo->mime_type == MIME_MULTIPART) {
 283                 if (mimeinfo->sub) {
 284                         mimeinfo = mimeinfo->sub;
 285                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 286                                 perror("fseek");
 287                                 return;
 288                         }
 289                 } else
 290                         return;
 291         }
 292         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 293                 boundary = mimeinfo->parent->boundary;
 294                 boundary_len = strlen(boundary);
 295         }
 296
 297         if (!boundary && (mimeinfo->mime_type == MIME_TEXT || mimeinfo->mime_type == MIME_TEXT_HTML || mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 298
 299                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 300                         perror("fseek");
 301                 headers = textview_scan_header(textview, fp);
 302         } else {
 303                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 304                         glong fpos;
 305                         MimeInfo *parent = mimeinfo->parent;
 306
 307                         while (parent->parent) {
 308                                 if (parent->main &&
 309                                     parent->main->mime_type ==
 310                                         MIME_MESSAGE_RFC822)
 311                                         break;
 312                                 parent = parent->parent;
 313                         }
 314
 315                         if ((fpos = ftell(fp)) < 0)
 316                                 perror("ftell");
 317                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 318                                 perror("fseek");
 319                         else {
 320                                 headers = textview_scan_header(textview, fp);
 321                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 322                                         perror("fseek");
 323                         }
 324                 }
 325                 /* skip MIME part headers */
 326                 while (fgets(buf, sizeof(buf), fp) != NULL)
 327                         if (buf[0] == '\r' || buf[0] == '\n') break;
 328         }
 329
 330         /* display attached RFC822 single text message */
 331         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 332                 if (headers) procheader_header_array_destroy(headers);
 333                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 334                 headers = textview_scan_header(textview, fp);
 335                 mimeinfo = mimeinfo->sub;
 336         } else if (!mimeinfo->parent &&
 337                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 338                 if (headers) procheader_header_array_destroy(headers);
 339                 if (!mimeinfo->sub) return;
 340                 headers = textview_scan_header(textview, fp);
 341                 mimeinfo = mimeinfo->sub;
 342         }
 343
 344         if (prefs_common.force_charset)
 345                 charset = prefs_common.force_charset;
 346         else if (mimeinfo->charset)
 347                 charset = mimeinfo->charset;
 348         textview_set_font(textview, charset);
 349
 350         conv = conv_code_converter_new(charset);
 351
 352         textview_clear(textview);
 353         text = GTK_TEXT(textview->text);
 354         gtk_text_freeze(text);
 355
 356         textview->body_pos = 0;
 357         textview->cur_pos  = 0;
 358
 359         if (headers) {
 360                 textview_show_header(textview, headers);
 361                 procheader_header_array_destroy(headers);
 362         }
 363
 364         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 365         if (tmpfp) {
 366                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 367                         textview_show_html(textview, tmpfp, conv);
 368                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 369                         textview_show_ertf(textview, tmpfp, conv);
 370                 else
 371                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 372                                 textview_write_line(textview, buf, conv);
 373                 fclose(tmpfp);
 374         }
 375
 376         conv_code_converter_destroy(conv);
 377
 378         gtk_text_thaw(text);
 379 }
 380
 381 #define TEXT_INSERT(str) \
 382         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
 383
 384 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 385 {
 386         GtkText *text;
 387
 388         if (!partinfo) return;
 389
 390         textview_set_font(textview, NULL);
 391         text = GTK_TEXT(textview->text);
 392         textview_clear(textview);
 393
 394         gtk_text_freeze(text);
 395
 396         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 397         TEXT_INSERT(_("right click and select `Save as...', "));
 398         TEXT_INSERT(_("or press `y' key.\n\n"));
 399
 400         TEXT_INSERT(_("To display this part as a text message, select "));
 401         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 402
 403         TEXT_INSERT(_("To open this part with external program, select "));
 404         TEXT_INSERT(_("`Open' or `Open with...', "));
 405         TEXT_INSERT(_("or double-click, or click the center button, "));
 406         TEXT_INSERT(_("or press `l' key."));
 407
 408         gtk_text_thaw(text);
 409 }
 410
 411 #if USE_GPGME
 412 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 413 {
 414         GtkText *text;
 415
 416         if (!partinfo) return;
 417
 418         textview_set_font(textview, NULL);
 419         text = GTK_TEXT(textview->text);
 420         textview_clear(textview);
 421
 422         gtk_text_freeze(text);
 423
 424         if (partinfo->sigstatus_full == NULL) {
 425                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 426                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 427                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 428         } else {
 429                 TEXT_INSERT(partinfo->sigstatus_full);
 430         }
 431
 432         gtk_text_thaw(text);
 433 }
 434 #endif /* USE_GPGME */
 435
 436 #undef TEXT_INSERT
 437
 438 static void textview_show_html(TextView *textview, FILE *fp,
 439                                CodeConverter *conv)
 440 {
 441         HTMLParser *parser;
 442         gchar *str;
 443         gchar* url = NULL;
 444
 445         parser = html_parser_new(fp, conv);
 446         g_return_if_fail(parser != NULL);
 447
 448         while ((str = html_parse(parser)) != NULL) {
 449                 if (parser->state == HTML_HREF) {
 450                         /* first time : get and copy the URL */
 451                         if (url == NULL) {
 452                                 /* ALF - the sylpheed html parser returns an empty string,
 453                                  * if still inside an <a>, but already parsed past HREF */
 454                                 str = strtok(str, " ");
 455                                 if (str) {
 456                                         url = strdup(str);
 457                                         /* the URL may (or not) be followed by the
 458                                          * referenced text */
 459                                         str = strtok(NULL, "");
 460                                 }
 461                         }
 462                         if (str != NULL) {
 463                                 textview_write_link(textview, url, str, NULL);
 464                         }
 465                 } else {
 466                         if (url != NULL) {
 467                                 free(url);
 468                                 url = NULL;
 469                         }
 470                         textview_write_line(textview, str, NULL);
 471                 }
 472         }
 473         html_parser_destroy(parser);
 474 }
 475
 476 static void textview_show_ertf(TextView *textview, FILE *fp,
 477                                CodeConverter *conv)
 478 {
 479         ERTFParser *parser;
 480         gchar *str;
 481         gchar* url = NULL;
 482
 483         parser = ertf_parser_new(fp, conv);
 484         g_return_if_fail(parser != NULL);
 485
 486         while ((str = ertf_parse(parser)) != NULL) {
 487                 textview_write_line(textview, str, NULL);
 488         }
 489         ertf_parser_destroy(parser);
 490 }
 491
 492 /* get_uri_part() - retrieves a URI starting from scanpos.
 493                     Returns TRUE if succesful */
 494 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 495                              const gchar **bp, const gchar **ep)
 496 {
 497         const gchar *ep_;
 498
 499         g_return_val_if_fail(start != NULL, FALSE);
 500         g_return_val_if_fail(scanpos != NULL, FALSE);
 501         g_return_val_if_fail(bp != NULL, FALSE);
 502         g_return_val_if_fail(ep != NULL, FALSE);
 503
 504         *bp = scanpos;
 505
 506         /* find end point of URI */
 507         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 508                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 509                         break;
 510         }
 511
 512         /* no punctuation at end of string */
 513
 514         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 515          * should pass some URI type to this function and decide on that whether
 516          * to perform punctuation stripping */
 517
 518 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 519
 520         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 521                 ;
 522
 523 #undef IS_REAL_PUNCT
 524
 525         *ep = ep_;
 526
 527         return TRUE;
 528 }
 529
 530 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 531 {
 532         return g_strndup(bp, ep - bp);
 533 }
 534
 535 /* valid mail address characters */
 536 #define IS_RFC822_CHAR(ch) \
 537         (isascii(ch) && \
 538          (ch) > 32   && \
 539          (ch) != 127 && \
 540          !isspace(ch) && \
 541          !strchr("()<>\"", (ch)))
 542
 543 /* alphabet and number within 7bit ASCII */
 544 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 545 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 546
 547 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 548 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 549                                const gchar **bp, const gchar **ep)
 550 {
 551         /* more complex than the uri part because we need to scan back and forward starting from
 552          * the scan position. */
 553         gboolean result = FALSE;
 554         const gchar *bp_ = NULL;
 555         const gchar *ep_ = NULL;
 556
 557         /* the informative part of the email address (describing the name
 558          * of the email address owner) may contain quoted parts. the
 559          * closure stack stores the last encountered quotes. */
 560         gchar closure_stack[128];
 561         gchar *ptr = closure_stack;
 562
 563         g_return_val_if_fail(start != NULL, FALSE);
 564         g_return_val_if_fail(scanpos != NULL, FALSE);
 565         g_return_val_if_fail(bp != NULL, FALSE);
 566         g_return_val_if_fail(ep != NULL, FALSE);
 567
 568         /* scan start of address */
 569         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 570                 ;
 571
 572         /* TODO: should start with an alnum? */
 573         bp_++;
 574         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 575                 ;
 576
 577         if (bp_ != scanpos) {
 578                 /* scan end of address */
 579                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 580                         ;
 581
 582                 /* TODO: really should terminate with an alnum? */
 583                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 584                         ;
 585                 ep_++;
 586
 587                 if (ep_ > scanpos + 1) {
 588                         *ep = ep_;
 589                         *bp = bp_;
 590                         result = TRUE;
 591                 }
 592         }
 593
 594         if (!result) return FALSE;
 595
 596         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 597         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 598                 return FALSE;
 599
 600         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 601         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 602                 return TRUE;
 603
 604 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 605 #define IN_STACK()      (ptr > closure_stack)
 606 /* has underrun check */
 607 #define POP_STACK()     if(IN_STACK()) --ptr
 608 /* has overrun check */
 609 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 610 /* has underrun check */
 611 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 612
 613         ep_++;
 614
 615         /* scan for the informative part. */
 616         for (bp_ -= 2; bp_ >= start; bp_--) {
 617                 /* if closure on the stack keep scanning */
 618                 if (PEEK_STACK() == *bp_) {
 619                         POP_STACK();
 620                         continue;
 621                 }
 622                 if (*bp_ == '\'' || *bp_ == '"') {
 623                         PUSH_STACK(*bp_);
 624                         continue;
 625                 }
 626
 627                 /* if nothing in the closure stack, do the special conditions
 628                  * the following if..else expression simply checks whether
 629                  * a token is acceptable. if not acceptable, the clause
 630                  * should terminate the loop with a 'break' */
 631                 if (!PEEK_STACK()) {
 632                         if (*bp_ == '-'
 633                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 634                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 635                                 /* hyphens are allowed, but only in
 636                                    between alnums */
 637                         } else if (!ispunct(*bp_)) {
 638                                 /* but anything not being a punctiation
 639                                    is ok */
 640                         } else {
 641                                 break; /* anything else is rejected */
 642                         }
 643                 }
 644         }
 645
 646         bp_++;
 647
 648 #undef PEEK_STACK
 649 #undef PUSH_STACK
 650 #undef POP_STACK
 651 #undef IN_STACK
 652 #undef FULL_STACK
 653
 654         /* scan forward (should start with an alnum) */
 655         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 656                 ;
 657
 658         *ep = ep_;
 659         *bp = bp_;
 660
 661         return result;
 662 }
 663
 664 #undef IS_QUOTE
 665 #undef IS_RFC822_CHAR
 666
 667 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 668 {
 669         /* returns a mailto: URI; mailto: is also used to detect the
 670          * uri type later on in the button_pressed signal handler */
 671         gchar *tmp;
 672         gchar *result;
 673
 674         tmp = g_strndup(bp, ep - bp);
 675         result = g_strconcat("mailto:", tmp, NULL);
 676         g_free(tmp);
 677
 678         return result;
 679 }
 680
 681 #define ADD_TXT_POS(bp_, ep_, pti_) \
 682         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 683                 last = last->next; \
 684                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 685                 last->next = NULL; \
 686         } else { \
 687                 g_warning("alloc error scanning URIs\n"); \
 688                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 689                                 linebuf, -1); \
 690                 return; \
 691         }
 692
 693 /* textview_make_clickable_parts() - colorizes clickable parts */
 694 static void textview_make_clickable_parts(TextView *textview,
 695                                           GdkFont *font,
 696                                           GdkColor *fg_color,
 697                                           GdkColor *uri_color,
 698                                           const gchar *linebuf)
 699 {
 700         /* parse table - in order of priority */
 701         struct table {
 702                 const gchar *needle; /* token */
 703
 704                 /* token search function */
 705                 gchar    *(*search)     (const gchar *haystack,
 706                                          const gchar *needle);
 707                 /* part parsing function */
 708                 gboolean  (*parse)      (const gchar *start,
 709                                          const gchar *scanpos,
 710                                          const gchar **bp_,
 711                                          const gchar **ep_);
 712                 /* part to URI function */
 713                 gchar    *(*build_uri)  (const gchar *bp,
 714                                          const gchar *ep);
 715         };
 716
 717         static struct table parser[] = {
 718                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 719                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 720                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 721                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 722                 {"@",        strcasestr, get_email_part, make_email_string}
 723         };
 724         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 725
 726         gint  n;
 727         const gchar *walk, *bp, *ep;
 728
 729         struct txtpos {
 730                 const gchar     *bp, *ep;       /* text position */
 731                 gint             pti;           /* index in parse table */
 732                 struct txtpos   *next;          /* next */
 733         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 734
 735         GtkText *text = GTK_TEXT(textview->text);
 736
 737         /* parse for clickable parts, and build a list of begin and end positions  */
 738         for (walk = linebuf, n = 0;;) {
 739                 gint last_index = PARSE_ELEMS;
 740                 gchar *scanpos = NULL;
 741
 742                 /* FIXME: this looks phony. scanning for anything in the parse table */
 743                 for (n = 0; n < PARSE_ELEMS; n++) {
 744                         gchar *tmp;
 745
 746                         tmp = parser[n].search(walk, parser[n].needle);
 747                         if (tmp) {
 748                                 if (scanpos == NULL || tmp < scanpos) {
 749                                         scanpos = tmp;
 750                                         last_index = n;
 751                                 }
 752                         }
 753                 }
 754
 755                 if (scanpos) {
 756                         /* check if URI can be parsed */
 757                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 758                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 759                                         ADD_TXT_POS(bp, ep, last_index);
 760                                         walk = ep;
 761                         } else
 762                                 walk = scanpos +
 763                                         strlen(parser[last_index].needle);
 764                 } else
 765                         break;
 766         }
 767
 768         /* colorize this line */
 769         if (head.next) {
 770                 const gchar *normal_text = linebuf;
 771
 772                 /* insert URIs */
 773                 for (last = head.next; last != NULL;
 774                      normal_text = last->ep, last = last->next) {
 775                         RemoteURI *uri;
 776
 777                         uri = g_new(RemoteURI, 1);
 778                         if (last->bp - normal_text > 0)
 779                                 gtk_text_insert(text, font,
 780                                                 fg_color, NULL,
 781                                                 normal_text,
 782                                                 last->bp - normal_text);
 783                         uri->uri = parser[last->pti].build_uri(last->bp,
 784                                                                last->ep);
 785                         uri->start = gtk_text_get_point(text);
 786                         gtk_text_insert(text, font, uri_color,
 787                                         NULL, last->bp, last->ep - last->bp);
 788                         uri->end = gtk_text_get_point(text);
 789                         textview->uri_list =
 790                                 g_slist_append(textview->uri_list, uri);
 791                 }
 792
 793                 if (*normal_text)
 794                         gtk_text_insert(text, font, fg_color,
 795                                         NULL, normal_text, -1);
 796         } else
 797                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 798 }
 799
 800 #undef ADD_TXT_POS
 801
 802 /* This function writes str as a double-clickable link with the given url. */
 803 static void textview_write_link(TextView *textview, const gchar *url,
 804                                 const gchar *str, CodeConverter *conv)
 805 {
 806     GdkColor *link_color = NULL;
 807     RemoteURI* uri;
 808     GtkText *text = GTK_TEXT(textview->text);
 809     gchar buf[BUFFSIZE];
 810
 811     /* this part is taken from textview_write_line. Right now the only place
 812      * that calls this function passes NULL for conv, but you never know. */
 813     if (!conv)
 814             strncpy2(buf, str, sizeof(buf));
 815     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 816             gtk_text_insert(text, textview->msgfont,
 817                             prefs_common.enable_color
 818                             ? &error_color : NULL, NULL,
 819                             "*** Warning: code conversion failed ***\n",
 820                             -1);
 821             return;
 822     }
 823
 824     /* this part is based on the code in make_clickable_parts */
 825     if (prefs_common.enable_color) {
 826         link_color = &uri_color;
 827     }
 828     uri = g_new(RemoteURI, 1);
 829     uri->uri = g_strdup(url);
 830     uri->start = gtk_text_get_point(text);
 831     gtk_text_insert(text, textview->msgfont, link_color, NULL, buf,
 832                     strlen(buf));
 833     uri->end = gtk_text_get_point(text);
 834     textview->uri_list = g_slist_append(textview->uri_list, uri);
 835 }
 836
 837 static void textview_write_line(TextView *textview, const gchar *str,
 838                                 CodeConverter *conv)
 839 {
 840         GtkText *text = GTK_TEXT(textview->text);
 841         gchar buf[BUFFSIZE];
 842         GdkColor *fg_color;
 843         gint quotelevel = -1;
 844
 845         if (!conv)
 846                 strncpy2(buf, str, sizeof(buf));
 847         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 848                 gtk_text_insert(text, textview->msgfont,
 849                                 prefs_common.enable_color
 850                                 ? &error_color : NULL, NULL,
 851                                 "*** Warning: code conversion failed ***\n",
 852                                 -1);
 853                 return;
 854         }
 855
 856         strcrchomp(buf);
 857         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 858         fg_color = NULL;
 859
 860         /* change color of quotation
 861            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 862            Up to 3 levels of quotations are detected, and each
 863            level is colored using a different color. */
 864         if (prefs_common.enable_color && strchr(buf, '>')) {
 865                 quotelevel = get_quote_level(buf);
 866
 867                 /* set up the correct foreground color */
 868                 if (quotelevel > 2) {
 869                         /* recycle colors */
 870                         if (prefs_common.recycle_quote_colors)
 871                                 quotelevel %= 3;
 872                         else
 873                                 quotelevel = 2;
 874                 }
 875         }
 876
 877         if (quotelevel == -1)
 878                 fg_color = NULL;
 879         else
 880                 fg_color = &quote_colors[quotelevel];
 881
 882         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 883                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 884
 885         if (prefs_common.enable_color)
 886                 textview_make_clickable_parts(textview, textview->msgfont,
 887                                               fg_color, &uri_color, buf);
 888         else
 889                 textview_make_clickable_parts(textview, textview->msgfont,
 890                                               fg_color, NULL, buf);
 891 }
 892
 893 void textview_clear(TextView *textview)
 894 {
 895         GtkText *text = GTK_TEXT(textview->text);
 896
 897         gtk_text_freeze(text);
 898         gtk_text_set_point(text, 0);
 899         gtk_text_forward_delete(text, gtk_text_get_length(text));
 900         gtk_text_thaw(text);
 901
 902         textview_uri_list_remove_all(textview->uri_list);
 903         textview->uri_list = NULL;
 904 }
 905
 906 void textview_destroy(TextView *textview)
 907 {
 908         textview_uri_list_remove_all(textview->uri_list);
 909         textview->uri_list = NULL;
 910
 911         if (!textview->scrolledwin_sb->parent)
 912                 gtk_widget_destroy(textview->scrolledwin_sb);
 913         if (!textview->scrolledwin_mb->parent)
 914                 gtk_widget_destroy(textview->scrolledwin_mb);
 915
 916         if (textview->msgfont) {
 917                 textview->msgfont->ascent = textview->prev_ascent;
 918                 textview->msgfont->descent = textview->prev_descent;
 919                 gdk_font_unref(textview->msgfont);
 920         }
 921         if (textview->boldfont)
 922                 gdk_font_unref(textview->boldfont);
 923
 924         g_free(textview);
 925 }
 926
 927 void textview_set_font(TextView *textview, const gchar *codeset)
 928 {
 929         gboolean use_fontset = TRUE;
 930
 931         /* In multi-byte mode, GtkText can't display 8bit characters
 932            correctly, so it must be single-byte mode. */
 933         if (MB_CUR_MAX > 1) {
 934                 if (codeset) {
 935                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 936                             !g_strcasecmp(codeset, "BALTIC"))
 937                                 use_fontset = FALSE;
 938                         else if (conv_get_current_charset() != C_EUC_JP &&
 939                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
 940                                   !g_strncasecmp(codeset, "CP", 2)    ||
 941                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
 942                                 use_fontset = FALSE;
 943                 }
 944         } else
 945                 use_fontset = FALSE;
 946
 947         if (textview->text_is_mb && !use_fontset) {
 948                 GtkWidget *parent;
 949
 950                 parent = textview->scrolledwin_mb->parent;
 951                 gtk_editable_select_region
 952                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 953                 gtk_container_remove(GTK_CONTAINER(parent),
 954                                      textview->scrolledwin_mb);
 955                 gtk_container_add(GTK_CONTAINER(parent),
 956                                   textview->scrolledwin_sb);
 957
 958                 textview->text = textview->text_sb;
 959                 textview->text_is_mb = FALSE;
 960         } else if (!textview->text_is_mb && use_fontset) {
 961                 GtkWidget *parent;
 962
 963                 parent = textview->scrolledwin_sb->parent;
 964                 gtk_editable_select_region
 965                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 966                 gtk_container_remove(GTK_CONTAINER(parent),
 967                                      textview->scrolledwin_sb);
 968                 gtk_container_add(GTK_CONTAINER(parent),
 969                                   textview->scrolledwin_mb);
 970
 971                 textview->text = textview->text_mb;
 972                 textview->text_is_mb = TRUE;
 973         }
 974
 975         if (prefs_common.textfont) {
 976                 if (textview->msgfont) {
 977                         textview->msgfont->ascent = textview->prev_ascent;
 978                         textview->msgfont->descent = textview->prev_descent;
 979                         gdk_font_unref(textview->msgfont);
 980                         textview->msgfont = NULL;
 981                 }
 982                 if (use_fontset)
 983                         textview->msgfont =
 984                                 gdk_fontset_load(prefs_common.textfont);
 985                 else {
 986                         if (MB_CUR_MAX > 1) {
 987                                 FONT_LOAD(textview->msgfont,
 988                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 989                         } else {
 990                                 FONT_LOAD(textview->msgfont,
 991                                           prefs_common.textfont);
 992                         }
 993                 }
 994
 995                 if (textview->msgfont) {
 996                         gint ascent, descent;
 997
 998                         textview->prev_ascent = textview->msgfont->ascent;
 999                         textview->prev_descent = textview->msgfont->descent;
1000                         descent = prefs_common.line_space / 2;
1001                         ascent  = prefs_common.line_space - descent;
1002                         textview->msgfont->ascent  += ascent;
1003                         textview->msgfont->descent += descent;
1004                 }
1005         }
1006
1007         if (!textview->boldfont)
1008                 FONT_LOAD(textview->boldfont, BOLD_FONT);
1009         if (!spacingfont)
1010                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1011 }
1012
1013 enum
1014 {
1015         H_DATE          = 0,
1016         H_FROM          = 1,
1017         H_TO            = 2,
1018         H_NEWSGROUPS    = 3,
1019         H_SUBJECT       = 4,
1020         H_CC            = 5,
1021         H_REPLY_TO      = 6,
1022         H_FOLLOWUP_TO   = 7,
1023         H_X_MAILER      = 8,
1024         H_X_NEWSREADER  = 9,
1025         H_USER_AGENT    = 10,
1026         H_ORGANIZATION  = 11,
1027 };
1028
1029 void textview_set_position(TextView *textview, gint pos)
1030 {
1031         if (pos < 0) {
1032                 textview->cur_pos =
1033                         gtk_text_get_length(GTK_TEXT(textview->text));
1034         } else {
1035                 textview->cur_pos = pos;
1036         }
1037 }
1038
1039 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1040 {
1041         gchar buf[BUFFSIZE];
1042         GPtrArray *headers, *sorted_headers;
1043         GSList *disphdr_list;
1044         Header *header;
1045         gint i;
1046
1047         g_return_val_if_fail(fp != NULL, NULL);
1048
1049         if (!prefs_common.display_header) {
1050                 while (fgets(buf, sizeof(buf), fp) != NULL)
1051                         if (buf[0] == '\r' || buf[0] == '\n') break;
1052                 return NULL;
1053         }
1054
1055         headers = procheader_get_header_array_asis(fp);
1056
1057         sorted_headers = g_ptr_array_new();
1058
1059         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1060              disphdr_list = disphdr_list->next) {
1061                 DisplayHeaderProp *dp =
1062                         (DisplayHeaderProp *)disphdr_list->data;
1063
1064                 for (i = 0; i < headers->len; i++) {
1065                         header = g_ptr_array_index(headers, i);
1066
1067                         if (procheader_headername_equal(header->name,
1068                                                         dp->name)) {
1069                                 if (dp->hidden)
1070                                         procheader_header_free(header);
1071                                 else
1072                                         g_ptr_array_add(sorted_headers, header);
1073
1074                                 g_ptr_array_remove_index(headers, i);
1075                                 i--;
1076                         }
1077                 }
1078         }
1079
1080         if (prefs_common.show_other_header) {
1081                 for (i = 0; i < headers->len; i++) {
1082                         header = g_ptr_array_index(headers, i);
1083                         g_ptr_array_add(sorted_headers, header);
1084                 }
1085         }
1086
1087         g_ptr_array_free(headers, FALSE);
1088
1089         return sorted_headers;
1090 }
1091
1092 static void textview_show_header(TextView *textview, GPtrArray *headers)
1093 {
1094         GtkText *text = GTK_TEXT(textview->text);
1095         Header *header;
1096         gint i;
1097
1098         g_return_if_fail(headers != NULL);
1099
1100         gtk_text_freeze(text);
1101
1102         for (i = 0; i < headers->len; i++) {
1103                 header = g_ptr_array_index(headers, i);
1104                 g_return_if_fail(header->name != NULL);
1105
1106                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
1107                                 header->name, -1);
1108                 if (header->name[strlen(header->name) - 1] != ' ')
1109                         gtk_text_insert(text, textview->boldfont,
1110                                         NULL, NULL, " ", 1);
1111
1112                 if (procheader_headername_equal(header->name, "Subject") ||
1113                     procheader_headername_equal(header->name, "From")    ||
1114                     procheader_headername_equal(header->name, "To")      ||
1115                     procheader_headername_equal(header->name, "Cc"))
1116                         unfold_line(header->body);
1117
1118                 if (prefs_common.enable_color &&
1119                     (procheader_headername_equal(header->name, "X-Mailer") ||
1120                      procheader_headername_equal(header->name,
1121                                                  "X-Newsreader")) &&
1122                     strstr(header->body, "Sylpheed") != NULL)
1123                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1124                                         header->body, -1);
1125                 else if (prefs_common.enable_color) {
1126                         textview_make_clickable_parts(textview,
1127                                                       NULL, NULL, &uri_color,
1128                                                       header->body);
1129                 } else {
1130                         textview_make_clickable_parts(textview,
1131                                                       NULL, NULL, NULL,
1132                                                       header->body);
1133                 }
1134                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1135         }
1136
1137         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1138         gtk_text_thaw(text);
1139         textview->body_pos = gtk_text_get_length(text);
1140 }
1141
1142 gboolean textview_search_string(TextView *textview, const gchar *str,
1143                                 gboolean case_sens)
1144 {
1145         GtkText *text = GTK_TEXT(textview->text);
1146         gint pos;
1147         wchar_t *wcs;
1148         gint len;
1149         gint text_len;
1150         gboolean found = FALSE;
1151
1152         g_return_val_if_fail(str != NULL, FALSE);
1153
1154         wcs = strdup_mbstowcs(str);
1155         g_return_val_if_fail(wcs != NULL, FALSE);
1156         len = wcslen(wcs);
1157         pos = textview->cur_pos;
1158         if (pos < textview->body_pos)
1159                 pos = textview->body_pos;
1160         text_len = gtk_text_get_length(text);
1161         if (text_len - pos < len) {
1162                 g_free(wcs);
1163                 return FALSE;
1164         }
1165
1166         for (; pos < text_len; pos++) {
1167                 if (text_len - pos < len) break;
1168                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1169                     == TRUE) {
1170                         gtk_editable_set_position(GTK_EDITABLE(text),
1171                                                   pos + len);
1172                         gtk_editable_select_region(GTK_EDITABLE(text),
1173                                                    pos, pos + len);
1174                         textview_set_position(textview, pos + len);
1175                         found = TRUE;
1176                         break;
1177                 }
1178                 if (text_len - pos == len) break;
1179         }
1180
1181         g_free(wcs);
1182         return found;
1183 }
1184
1185 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1186                                          gboolean case_sens)
1187 {
1188         GtkText *text = GTK_TEXT(textview->text);
1189         gint pos;
1190         wchar_t *wcs;
1191         gint len;
1192         gint text_len;
1193         gboolean found = FALSE;
1194
1195         g_return_val_if_fail(str != NULL, FALSE);
1196
1197         wcs = strdup_mbstowcs(str);
1198         g_return_val_if_fail(wcs != NULL, FALSE);
1199         len = wcslen(wcs);
1200         pos = textview->cur_pos;
1201         text_len = gtk_text_get_length(text);
1202         if (text_len - textview->body_pos < len) {
1203                 g_free(wcs);
1204                 return FALSE;
1205         }
1206         if (pos <= textview->body_pos || text_len - pos < len)
1207                 pos = text_len - len;
1208
1209         for (; pos >= textview->body_pos; pos--) {
1210                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1211                     == TRUE) {
1212                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1213                         gtk_editable_select_region(GTK_EDITABLE(text),
1214                                                    pos, pos + len);
1215                         textview_set_position(textview, pos - 1);
1216                         found = TRUE;
1217                         break;
1218                 }
1219                 if (pos == textview->body_pos) break;
1220         }
1221
1222         g_free(wcs);
1223         return found;
1224 }
1225
1226 void textview_scroll_one_line(TextView *textview, gboolean up)
1227 {
1228         GtkText *text = GTK_TEXT(textview->text);
1229         gfloat upper;
1230
1231         if (prefs_common.enable_smooth_scroll) {
1232                 textview_smooth_scroll_one_line(textview, up);
1233                 return;
1234         }
1235
1236         if (!up) {
1237                 upper = text->vadj->upper - text->vadj->page_size;
1238                 if (text->vadj->value < upper) {
1239                         text->vadj->value +=
1240                                 text->vadj->step_increment * 4;
1241                         text->vadj->value =
1242                                 MIN(text->vadj->value, upper);
1243                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1244                                                 "value_changed");
1245                 }
1246         } else {
1247                 if (text->vadj->value > 0.0) {
1248                         text->vadj->value -=
1249                                 text->vadj->step_increment * 4;
1250                         text->vadj->value =
1251                                 MAX(text->vadj->value, 0.0);
1252                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1253                                                 "value_changed");
1254                 }
1255         }
1256 }
1257
1258 gboolean textview_scroll_page(TextView *textview, gboolean up)
1259 {
1260         GtkText *text = GTK_TEXT(textview->text);
1261         gfloat upper;
1262         gfloat page_incr;
1263
1264         if (prefs_common.enable_smooth_scroll)
1265                 return textview_smooth_scroll_page(textview, up);
1266
1267         if (prefs_common.scroll_halfpage)
1268                 page_incr = text->vadj->page_increment / 2;
1269         else
1270                 page_incr = text->vadj->page_increment;
1271
1272         if (!up) {
1273                 upper = text->vadj->upper - text->vadj->page_size;
1274                 if (text->vadj->value < upper) {
1275                         text->vadj->value += page_incr;
1276                         text->vadj->value = MIN(text->vadj->value, upper);
1277                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1278                                                 "value_changed");
1279                 } else
1280                         return FALSE;
1281         } else {
1282                 if (text->vadj->value > 0.0) {
1283                         text->vadj->value -= page_incr;
1284                         text->vadj->value = MAX(text->vadj->value, 0.0);
1285                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1286                                                 "value_changed");
1287                 } else
1288                         return FALSE;
1289         }
1290
1291         return TRUE;
1292 }
1293
1294 static void textview_smooth_scroll_do(TextView *textview,
1295                                       gfloat old_value, gfloat last_value,
1296                                       gint step)
1297 {
1298         GtkText *text = GTK_TEXT(textview->text);
1299         gint change_value;
1300         gboolean up;
1301         gint i;
1302
1303         if (old_value < last_value) {
1304                 change_value = last_value - old_value;
1305                 up = FALSE;
1306         } else {
1307                 change_value = old_value - last_value;
1308                 up = TRUE;
1309         }
1310
1311         gdk_key_repeat_disable();
1312
1313         for (i = step; i <= change_value; i += step) {
1314                 text->vadj->value = old_value + (up ? -i : i);
1315                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1316                                         "value_changed");
1317         }
1318
1319         text->vadj->value = last_value;
1320         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1321
1322         gdk_key_repeat_restore();
1323 }
1324
1325 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1326 {
1327         GtkText *text = GTK_TEXT(textview->text);
1328         gfloat upper;
1329         gfloat old_value;
1330         gfloat last_value;
1331
1332         if (!up) {
1333                 upper = text->vadj->upper - text->vadj->page_size;
1334                 if (text->vadj->value < upper) {
1335                         old_value = text->vadj->value;
1336                         last_value = text->vadj->value +
1337                                 text->vadj->step_increment * 4;
1338                         last_value = MIN(last_value, upper);
1339
1340                         textview_smooth_scroll_do(textview, old_value,
1341                                                   last_value,
1342                                                   prefs_common.scroll_step);
1343                 }
1344         } else {
1345                 if (text->vadj->value > 0.0) {
1346                         old_value = text->vadj->value;
1347                         last_value = text->vadj->value -
1348                                 text->vadj->step_increment * 4;
1349                         last_value = MAX(last_value, 0.0);
1350
1351                         textview_smooth_scroll_do(textview, old_value,
1352                                                   last_value,
1353                                                   prefs_common.scroll_step);
1354                 }
1355         }
1356 }
1357
1358 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1359 {
1360         GtkText *text = GTK_TEXT(textview->text);
1361         gfloat upper;
1362         gfloat page_incr;
1363         gfloat old_value;
1364         gfloat last_value;
1365
1366         if (prefs_common.scroll_halfpage)
1367                 page_incr = text->vadj->page_increment / 2;
1368         else
1369                 page_incr = text->vadj->page_increment;
1370
1371         if (!up) {
1372                 upper = text->vadj->upper - text->vadj->page_size;
1373                 if (text->vadj->value < upper) {
1374                         old_value = text->vadj->value;
1375                         last_value = text->vadj->value + page_incr;
1376                         last_value = MIN(last_value, upper);
1377
1378                         textview_smooth_scroll_do(textview, old_value,
1379                                                   last_value,
1380                                                   prefs_common.scroll_step);
1381                 } else
1382                         return FALSE;
1383         } else {
1384                 if (text->vadj->value > 0.0) {
1385                         old_value = text->vadj->value;
1386                         last_value = text->vadj->value - page_incr;
1387                         last_value = MAX(last_value, 0.0);
1388
1389                         textview_smooth_scroll_do(textview, old_value,
1390                                                   last_value,
1391                                                   prefs_common.scroll_step);
1392                 } else
1393                         return FALSE;
1394         }
1395
1396         return TRUE;
1397 }
1398
1399 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1400                                  TextView *textview)
1401 {
1402         SummaryView *summaryview = NULL;
1403
1404         if (!event) return;
1405         if (textview->messageview->mainwin)
1406                 summaryview = textview->messageview->mainwin->summaryview;
1407
1408         switch (event->keyval) {
1409         case GDK_Tab:
1410         case GDK_Home:
1411         case GDK_Left:
1412         case GDK_Up:
1413         case GDK_Right:
1414         case GDK_Down:
1415         case GDK_Page_Up:
1416         case GDK_Page_Down:
1417         case GDK_End:
1418         case GDK_Control_L:
1419         case GDK_Control_R:
1420                 break;
1421         case GDK_space:
1422                 if (summaryview)
1423                         summary_pass_key_press_event(summaryview, event);
1424                 else
1425                         textview_scroll_page(textview, FALSE);
1426                 break;
1427         case GDK_BackSpace:
1428                 textview_scroll_page(textview, TRUE);
1429                 break;
1430         case GDK_Return:
1431                 textview_scroll_one_line(textview,
1432                                          (event->state & GDK_MOD1_MASK) != 0);
1433                 break;
1434         default:
1435                 if (summaryview)
1436                         summary_pass_key_press_event(summaryview, event);
1437                 break;
1438         }
1439 }
1440
1441 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1442                                     TextView *textview)
1443 {
1444         textview->cur_pos =
1445                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1446
1447         if (event &&
1448             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1449              || event->button == 2 || event->button == 3)) {
1450                 GSList *cur;
1451
1452                 /* double click seems to set the cursor after the current
1453                  * word. The cursor position needs fixing, otherwise the
1454                  * last word of a clickable zone will not work */
1455                 if (event->button == 1 && event->type == GDK_2BUTTON_PRESS) {
1456                         textview->cur_pos--;
1457                 }
1458
1459                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1460                         RemoteURI *uri = (RemoteURI *)cur->data;
1461
1462                         if (textview->cur_pos >= uri->start &&
1463                             textview->cur_pos <  uri->end) {
1464                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1465                                         if (event->button == 3) {
1466                                                 gchar *fromname, *fromaddress;
1467                                                 /* extract url */
1468                                                 fromaddress = g_strdup(uri->uri + 7);
1469                                                 /* Hiroyuki: please put this function in utils.c! */
1470                                                 fromname = procheader_get_fromname(fromaddress);
1471                                                 extract_address(fromaddress);
1472                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1473                                                 // Add to address book - Match
1474                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1475                                                 g_free(fromaddress);
1476                                                 g_free(fromname);
1477                                         } else {
1478                                                 compose_new_with_recipient
1479                                                         (NULL, uri->uri + 7);
1480                                         }
1481                                 } else {
1482                                         open_uri(uri->uri,
1483                                                  prefs_common.uri_cmd);
1484                                 }
1485                         }
1486                 }
1487         }
1488 }
1489
1490 static void textview_uri_list_remove_all(GSList *uri_list)
1491 {
1492         GSList *cur;
1493
1494         for (cur = uri_list; cur != NULL; cur = cur->next) {
1495                 if (cur->data) {
1496                         g_free(((RemoteURI *)cur->data)->uri);
1497                         g_free(cur->data);
1498                 }
1499         }
1500
1501         g_slist_free(uri_list);
1502 }