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 "compose.h"
  49 #include "addressbook.h"
  50 #include "displayheader.h"
  51
  52 #define FONT_LOAD(font, s) \
  53 { \
  54         gchar *fontstr, *p; \
  55  \
  56         Xstrdup_a(fontstr, s, ); \
  57         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  58         font = gdk_font_load(fontstr); \
  59 }
  60
  61 typedef struct _RemoteURI       RemoteURI;
  62
  63 struct _RemoteURI
  64 {
  65         gchar *uri;
  66
  67         guint start;
  68         guint end;
  69 };
  70
  71 static GdkColor quote_colors[3] = {
  72         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  73         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  74         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  75 };
  76
  77 static GdkColor uri_color = {
  78         (gulong)0,
  79         (gushort)0,
  80         (gushort)0,
  81         (gushort)0
  82 };
  83
  84 static GdkColor emphasis_color = {
  85         (gulong)0,
  86         (gushort)0,
  87         (gushort)0,
  88         (gushort)0xcfff
  89 };
  90
  91 static GdkColor error_color = {
  92         (gulong)0,
  93         (gushort)0xefff,
  94         (gushort)0,
  95         (gushort)0
  96 };
  97
  98 static GdkFont *spacingfont;
  99
 100 static void textview_show_html          (TextView       *textview,
 101                                          FILE           *fp,
 102                                          CodeConverter  *conv);
 103 static void textview_write_line         (TextView       *textview,
 104                                          const gchar    *str,
 105                                          CodeConverter  *conv);
 106 static GPtrArray *textview_scan_header  (TextView       *textview,
 107                                          FILE           *fp);
 108 static void textview_show_header        (TextView       *textview,
 109                                          GPtrArray      *headers);
 110
 111 static void textview_key_pressed        (GtkWidget      *widget,
 112                                          GdkEventKey    *event,
 113                                          TextView       *textview);
 114 static void textview_button_pressed     (GtkWidget      *widget,
 115                                          GdkEventButton *event,
 116                                          TextView       *textview);
 117
 118 static void textview_uri_list_remove_all(GSList         *uri_list);
 119
 120 static void textview_smooth_scroll_do           (TextView       *textview,
 121                                                  gfloat          old_value,
 122                                                  gfloat          last_value,
 123                                                  gint            step);
 124 static void textview_smooth_scroll_one_line     (TextView       *textview,
 125                                                  gboolean        up);
 126 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 127                                                  gboolean        up);
 128
 129
 130 TextView *textview_create(void)
 131 {
 132         TextView *textview;
 133         GtkWidget *vbox;
 134         GtkWidget *scrolledwin_sb;
 135         GtkWidget *scrolledwin_mb;
 136         GtkWidget *text_sb;
 137         GtkWidget *text_mb;
 138
 139         debug_print(_("Creating text view...\n"));
 140         textview = g_new0(TextView, 1);
 141
 142         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 143         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 144         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 145                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 146         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 147                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 148         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 149         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 150
 151         /* create GtkText widgets for single-byte and multi-byte character */
 152         text_sb = gtk_text_new(NULL, NULL);
 153         text_mb = gtk_text_new(NULL, NULL);
 154         GTK_TEXT(text_sb)->default_tab_width = 8;
 155         GTK_TEXT(text_mb)->default_tab_width = 8;
 156         gtk_widget_show(text_sb);
 157         gtk_widget_show(text_mb);
 158         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 159         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 160         gtk_widget_ensure_style(text_sb);
 161         gtk_widget_ensure_style(text_mb);
 162         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 163                 GtkStyle *style;
 164
 165                 style = gtk_style_copy(text_sb->style);
 166                 gdk_font_unref(style->font);
 167                 FONT_LOAD(style->font, NORMAL_FONT);
 168                 gtk_widget_set_style(text_sb, style);
 169         }
 170         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 171                 GtkStyle *style;
 172
 173                 style = gtk_style_copy(text_mb->style);
 174                 gdk_font_unref(style->font);
 175                 style->font = gdk_fontset_load(NORMAL_FONT);
 176                 gtk_widget_set_style(text_mb, style);
 177         }
 178         gtk_widget_ref(scrolledwin_sb);
 179         gtk_widget_ref(scrolledwin_mb);
 180
 181         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 182         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 183         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 184                            GTK_SIGNAL_FUNC(textview_key_pressed),
 185                            textview);
 186         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 187                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 188                                  textview);
 189         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 190                            GTK_SIGNAL_FUNC(textview_key_pressed),
 191                            textview);
 192         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 193                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 194                                  textview);
 195
 196         gtk_widget_show(scrolledwin_sb);
 197         gtk_widget_show(scrolledwin_mb);
 198
 199         vbox = gtk_vbox_new(FALSE, 0);
 200         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 201
 202         textview->vbox           = vbox;
 203         textview->scrolledwin    = scrolledwin_sb;
 204         textview->scrolledwin_sb = scrolledwin_sb;
 205         textview->scrolledwin_mb = scrolledwin_mb;
 206         textview->text           = text_sb;
 207         textview->text_sb        = text_sb;
 208         textview->text_mb        = text_mb;
 209         textview->text_is_mb     = FALSE;
 210         textview->uri_list       = NULL;
 211         textview->body_pos       = 0;
 212         textview->cur_pos        = 0;
 213
 214         return textview;
 215 }
 216
 217 void textview_init(TextView *textview)
 218 {
 219         gtkut_widget_disable_theme_engine(textview->text_sb);
 220         gtkut_widget_disable_theme_engine(textview->text_mb);
 221         textview_update_message_colors();
 222         textview_set_font(textview, NULL);
 223 }
 224
 225 void textview_update_message_colors(void)
 226 {
 227         GdkColor black = {0, 0, 0, 0};
 228
 229         if (prefs_common.enable_color) {
 230                 /* grab the quote colors, converting from an int to a GdkColor */
 231                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 232                                                &quote_colors[0]);
 233                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 234                                                &quote_colors[1]);
 235                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 236                                                &quote_colors[2]);
 237                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 238                                                &uri_color);
 239         } else {
 240                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 241                         uri_color = emphasis_color = black;
 242         }
 243 }
 244
 245 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 246                            const gchar *file)
 247 {
 248         FILE *fp;
 249
 250         if ((fp = fopen(file, "r")) == NULL) {
 251                 FILE_OP_ERROR(file, "fopen");
 252                 return;
 253         }
 254
 255         textview_show_part(textview, mimeinfo, fp);
 256
 257         fclose(fp);
 258 }
 259
 260 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 261 {
 262         GtkText *text;
 263         gchar buf[BUFFSIZE];
 264         const gchar *boundary = NULL;
 265         gint boundary_len = 0;
 266         const gchar *charset = NULL;
 267         FILE *tmpfp;
 268         GPtrArray *headers = NULL;
 269         CodeConverter *conv;
 270
 271         g_return_if_fail(mimeinfo != NULL);
 272         g_return_if_fail(fp != NULL);
 273
 274         if (mimeinfo->mime_type == MIME_MULTIPART) {
 275                 if (mimeinfo->sub) {
 276                         mimeinfo = mimeinfo->sub;
 277                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 278                                 perror("fseek");
 279                                 return;
 280                         }
 281                 } else
 282                         return;
 283         }
 284         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 285                 boundary = mimeinfo->parent->boundary;
 286                 boundary_len = strlen(boundary);
 287         }
 288
 289         if (!boundary && mimeinfo->mime_type == MIME_TEXT) {
 290                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 291                         perror("fseek");
 292                 headers = textview_scan_header(textview, fp);
 293         } else {
 294                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 295                         glong fpos;
 296
 297                         if ((fpos = ftell(fp)) < 0)
 298                                 perror("ftell");
 299                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
 300                                  < 0)
 301                                 perror("fseek");
 302                         else {
 303                                 headers = textview_scan_header(textview, fp);
 304                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 305                                         perror("fseek");
 306                         }
 307                 }
 308                 while (fgets(buf, sizeof(buf), fp) != NULL)
 309                         if (buf[0] == '\r' || buf[0] == '\n') break;
 310         }
 311
 312         /* display attached RFC822 single text message */
 313         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 314                 if (headers) procheader_header_array_destroy(headers);
 315                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 316                 headers = textview_scan_header(textview, fp);
 317                 mimeinfo = mimeinfo->sub;
 318         } else if (!mimeinfo->parent &&
 319                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 320                 if (headers) procheader_header_array_destroy(headers);
 321                 if (!mimeinfo->sub) return;
 322                 headers = textview_scan_header(textview, fp);
 323                 mimeinfo = mimeinfo->sub;
 324         }
 325
 326         if (prefs_common.force_charset)
 327                 charset = prefs_common.force_charset;
 328         else if (mimeinfo->charset)
 329                 charset = mimeinfo->charset;
 330         textview_set_font(textview, charset);
 331
 332         conv = conv_code_converter_new(charset);
 333
 334         textview_clear(textview);
 335         text = GTK_TEXT(textview->text);
 336         gtk_text_freeze(text);
 337
 338         textview->body_pos = 0;
 339         textview->cur_pos  = 0;
 340
 341         if (headers) {
 342                 textview_show_header(textview, headers);
 343                 procheader_header_array_destroy(headers);
 344         }
 345
 346         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 347         if (tmpfp) {
 348                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 349                         textview_show_html(textview, tmpfp, conv);
 350                 else
 351                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 352                                 textview_write_line(textview, buf, conv);
 353                 fclose(tmpfp);
 354         }
 355
 356         conv_code_converter_destroy(conv);
 357
 358         gtk_text_thaw(text);
 359 }
 360
 361 #define TEXT_INSERT(str) \
 362         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
 363
 364 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 365 {
 366         GtkText *text;
 367
 368         if (!partinfo) return;
 369
 370         textview_set_font(textview, NULL);
 371         text = GTK_TEXT(textview->text);
 372         textview_clear(textview);
 373
 374         gtk_text_freeze(text);
 375
 376         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 377         TEXT_INSERT(_("right click and select `Save as...', "));
 378         TEXT_INSERT(_("or press `y' key.\n\n"));
 379
 380         TEXT_INSERT(_("To display this part as a text message, select "));
 381         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 382
 383         TEXT_INSERT(_("To open this part with external program, select "));
 384         TEXT_INSERT(_("`Open' or `Open with...', "));
 385         TEXT_INSERT(_("or double-click, or click the center button, "));
 386         TEXT_INSERT(_("or press `l' key."));
 387
 388         gtk_text_thaw(text);
 389 }
 390
 391 #if USE_GPGME
 392 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 393 {
 394         GtkText *text;
 395
 396         if (!partinfo) return;
 397
 398         textview_set_font(textview, NULL);
 399         text = GTK_TEXT(textview->text);
 400         textview_clear(textview);
 401
 402         gtk_text_freeze(text);
 403
 404         if (partinfo->sigstatus_full == NULL) {
 405                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 406                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 407                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 408         } else {
 409                 TEXT_INSERT(partinfo->sigstatus_full);
 410         }
 411
 412         gtk_text_thaw(text);
 413 }
 414 #endif /* USE_GPGME */
 415
 416 #undef TEXT_INSERT
 417
 418 static void textview_show_html(TextView *textview, FILE *fp,
 419                                CodeConverter *conv)
 420 {
 421         HTMLParser *parser;
 422         gchar *str;
 423
 424         parser = html_parser_new(fp, conv);
 425         g_return_if_fail(parser != NULL);
 426
 427         while ((str = html_parse(parser)) != NULL) {
 428                 textview_write_line(textview, str, NULL);
 429         }
 430         html_parser_destroy(parser);
 431 }
 432
 433 /* get_uri_part() - retrieves a URI starting from scanpos.
 434                     Returns TRUE if succesful */
 435 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 436                              const gchar **bp, const gchar **ep)
 437 {
 438         const gchar *ep_;
 439
 440         g_return_val_if_fail(start != NULL, FALSE);
 441         g_return_val_if_fail(scanpos != NULL, FALSE);
 442         g_return_val_if_fail(bp != NULL, FALSE);
 443         g_return_val_if_fail(ep != NULL, FALSE);
 444
 445         *bp = scanpos;
 446
 447         /* find end point of URI */
 448         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 449                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 450                         break;
 451         }
 452
 453         /* no punctuation at end of string */
 454
 455         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 456          * should pass some URI type to this function and decide on that whether
 457          * to perform punctuation stripping */
 458
 459 #define IS_REAL_PUNCT(ch) \
 460         (ispunct(ch) && ((ch) != '/'))
 461
 462         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 463                 ;
 464
 465 #undef IS_REAL_PUNCT
 466
 467         *ep = ep_;
 468
 469         return TRUE;
 470 }
 471
 472 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 473 {
 474         return g_strndup(bp, ep - bp);
 475 }
 476
 477 /* valid mail address characters */
 478 #define IS_RFC822_CHAR(ch) \
 479         (isascii(ch) && \
 480          (ch) > 32   && \
 481          (ch) != 127 && \
 482          !isspace(ch) && \
 483          !strchr("()<>\"", (ch)))
 484
 485 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 486
 487 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 488 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 489                                const gchar **bp, const gchar **ep)
 490 {
 491         /* more complex than the uri part because we need to scan back and forward starting from
 492          * the scan position. */
 493         gboolean result = FALSE;
 494         const gchar *bp_ = NULL;
 495         const gchar *ep_ = NULL;
 496
 497         /* the informative part of the email address (describing the name
 498          * of the email address owner) may contain quoted parts. the
 499          * closure stack stores the last encountered quotes. */
 500         gchar closure_stack[128];
 501         gchar *ptr = closure_stack;
 502
 503         g_return_val_if_fail(start != NULL, FALSE);
 504         g_return_val_if_fail(scanpos != NULL, FALSE);
 505         g_return_val_if_fail(bp != NULL, FALSE);
 506         g_return_val_if_fail(ep != NULL, FALSE);
 507
 508         /* scan start of address */
 509         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 510                 ;
 511
 512         /* TODO: should start with an alnum? */
 513         bp_++;
 514         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
 515                 ;
 516
 517         if (bp_ != scanpos) {
 518                 /* scan end of address */
 519                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 520                         ;
 521
 522                 /* TODO: really should terminate with an alnum? */
 523                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
 524                         ;
 525                 ep_++;
 526
 527                 if (ep_ > scanpos + 1) {
 528                         *ep = ep_;
 529                         *bp = bp_;
 530                         result = TRUE;
 531                 }
 532         }
 533
 534         if (!result) return FALSE;
 535
 536         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 537         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 538                 return FALSE;
 539
 540         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 541         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 542                 return TRUE;
 543
 544 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 545 #define IN_STACK()      (ptr > closure_stack)
 546 /* has underrun check */
 547 #define POP_STACK()     if(IN_STACK()) --ptr
 548 /* has overrun check */
 549 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 550 /* has underrun check */
 551 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 552
 553         ep_++;
 554
 555         /* scan for the informative part. */
 556         for (bp_ -= 2; bp_ >= start; bp_--) {
 557                 /* if closure on the stack keep scanning */
 558                 if (PEEK_STACK() == *bp_) {
 559                         POP_STACK();
 560                         continue;
 561                 }
 562                 if (*bp_ == '\'' || *bp_ == '"') {
 563                         PUSH_STACK(*bp_);
 564                         continue;
 565                 }
 566
 567                 /* if nothing in the closure stack, do the special conditions
 568                  * the following if..else expression simply checks whether
 569                  * a token is acceptable. if not acceptable, the clause
 570                  * should terminate the loop with a 'break' */
 571                 if (!PEEK_STACK()) {
 572                         if (*bp_ == '-'
 573                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 574                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 575                                 /* hyphens are allowed, but only in
 576                                    between alnums */
 577                         } else if (!ispunct(*bp_)) {
 578                                 /* but anything not being a punctiation
 579                                    is ok */
 580                         } else {
 581                                 break; /* anything else is rejected */
 582                         }
 583                 }
 584         }
 585
 586         bp_++;
 587
 588 #undef PEEK_STACK
 589 #undef PUSH_STACK
 590 #undef POP_STACK
 591 #undef IN_STACK
 592 #undef FULL_STACK
 593
 594         /* scan forward (should start with an alnum) */
 595         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 596                 ;
 597
 598         *ep = ep_;
 599         *bp = bp_;
 600
 601         return result;
 602 }
 603
 604 #undef IS_QUOTE
 605 #undef IS_RFC822_CHAR
 606
 607 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 608 {
 609         /* returns a mailto: URI; mailto: is also used to detect the
 610          * uri type later on in the button_pressed signal handler */
 611         gchar *tmp;
 612         gchar *result;
 613
 614         tmp = g_strndup(bp, ep - bp);
 615         result = g_strconcat("mailto:", tmp, NULL);
 616         g_free(tmp);
 617
 618         return result;
 619 }
 620
 621 #define ADD_TXT_POS(bp_, ep_, pti_) \
 622         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 623                 last = last->next; \
 624                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 625                 last->next = NULL; \
 626         } else { \
 627                 g_warning("alloc error scanning URIs\n"); \
 628                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 629                                 linebuf, -1); \
 630                 return; \
 631         }
 632
 633 /* textview_make_clickable_parts() - colorizes clickable parts */
 634 static void textview_make_clickable_parts(TextView *textview,
 635                                           GdkFont *font,
 636                                           GdkColor *fg_color,
 637                                           GdkColor *uri_color,
 638                                           const gchar *linebuf)
 639 {
 640         /* parse table - in order of priority */
 641         struct table {
 642                 const gchar *needle; /* token */
 643
 644                 /* token search function */
 645                 gchar    *(*search)     (const gchar *haystack,
 646                                          const gchar *needle);
 647                 /* part parsing function */
 648                 gboolean  (*parse)      (const gchar *start,
 649                                          const gchar *scanpos,
 650                                          const gchar **bp_,
 651                                          const gchar **ep_);
 652                 /* part to URI function */
 653                 gchar    *(*build_uri)  (const gchar *bp,
 654                                          const gchar *ep);
 655         };
 656
 657         static struct table parser[] = {
 658                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 659                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 660                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 661                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 662                 {"@",        strcasestr, get_email_part, make_email_string}
 663         };
 664         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 665
 666         gint  n;
 667         const gchar *walk, *bp, *ep;
 668
 669         struct txtpos {
 670                 const gchar     *bp, *ep;       /* text position */
 671                 gint             pti;           /* index in parse table */
 672                 struct txtpos   *next;          /* next */
 673         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 674
 675         GtkText *text = GTK_TEXT(textview->text);
 676
 677         /* parse for clickable parts, and build a list of begin and end positions  */
 678         for (walk = linebuf, n = 0;;) {
 679                 gint last_index = PARSE_ELEMS;
 680                 gchar *scanpos = NULL;
 681
 682                 /* FIXME: this looks phony. scanning for anything in the parse table */
 683                 for (n = 0; n < PARSE_ELEMS; n++) {
 684                         gchar *tmp;
 685
 686                         tmp = parser[n].search(walk, parser[n].needle);
 687                         if (tmp) {
 688                                 if (scanpos == NULL || tmp < scanpos) {
 689                                         scanpos = tmp;
 690                                         last_index = n;
 691                                 }
 692                         }
 693                 }
 694
 695                 if (scanpos) {
 696                         /* check if URI can be parsed */
 697                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 698                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 699                                         ADD_TXT_POS(bp, ep, last_index);
 700                                         walk = ep;
 701                         } else
 702                                 walk = scanpos +
 703                                         strlen(parser[last_index].needle);
 704                 } else
 705                         break;
 706         }
 707
 708         /* colorize this line */
 709         if (head.next) {
 710                 const gchar *normal_text = linebuf;
 711
 712                 /* insert URIs */
 713                 for (last = head.next; last != NULL;
 714                      normal_text = last->ep, last = last->next) {
 715                         RemoteURI *uri;
 716
 717                         uri = g_new(RemoteURI, 1);
 718                         if (last->bp - normal_text > 0)
 719                                 gtk_text_insert(text, font,
 720                                                 fg_color, NULL,
 721                                                 normal_text,
 722                                                 last->bp - normal_text);
 723                         uri->uri = parser[last->pti].build_uri(last->bp,
 724                                                                last->ep);
 725                         uri->start = gtk_text_get_point(text);
 726                         gtk_text_insert(text, font, uri_color,
 727                                         NULL, last->bp, last->ep - last->bp);
 728                         uri->end = gtk_text_get_point(text);
 729                         textview->uri_list =
 730                                 g_slist_append(textview->uri_list, uri);
 731                 }
 732
 733                 if (*normal_text)
 734                         gtk_text_insert(text, font, fg_color,
 735                                         NULL, normal_text, -1);
 736         } else
 737                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 738 }
 739
 740 #undef ADD_TXT_POS
 741
 742 static void textview_write_line(TextView *textview, const gchar *str,
 743                                 CodeConverter *conv)
 744 {
 745         GtkText *text = GTK_TEXT(textview->text);
 746         gchar buf[BUFFSIZE];
 747         size_t len;
 748         GdkColor *fg_color;
 749         gint quotelevel = -1;
 750
 751         if (!conv)
 752                 strncpy2(buf, str, sizeof(buf));
 753         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 754                 gtk_text_insert(text, textview->msgfont,
 755                                 prefs_common.enable_color
 756                                 ? &error_color : NULL, NULL,
 757                                 "*** Warning: code conversion failed ***\n",
 758                                 -1);
 759                 return;
 760         }
 761
 762         len = strlen(buf);
 763         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 764                 buf[len - 2] = '\n';
 765                 buf[len - 1] = '\0';
 766         }
 767         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 768         fg_color = NULL;
 769
 770         /* change color of quotation
 771            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 772            Up to 3 levels of quotations are detected, and each
 773            level is colored using a different color. */
 774         if (prefs_common.enable_color && strchr(buf, '>')) {
 775                 quotelevel = get_quote_level(buf);
 776
 777                 /* set up the correct foreground color */
 778                 if (quotelevel > 2) {
 779                         /* recycle colors */
 780                         if (prefs_common.recycle_quote_colors)
 781                                 quotelevel %= 3;
 782                         else
 783                                 quotelevel = 2;
 784                 }
 785         }
 786
 787         if (quotelevel == -1)
 788                 fg_color = NULL;
 789         else
 790                 fg_color = &quote_colors[quotelevel];
 791
 792         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 793                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 794
 795         if (prefs_common.enable_color)
 796                 textview_make_clickable_parts(textview, textview->msgfont,
 797                                               fg_color, &uri_color, buf);
 798         else
 799                 textview_make_clickable_parts(textview, textview->msgfont,
 800                                               fg_color, NULL, buf);
 801 }
 802
 803 void textview_clear(TextView *textview)
 804 {
 805         GtkText *text = GTK_TEXT(textview->text);
 806
 807         gtk_text_freeze(text);
 808         gtk_text_set_point(text, 0);
 809         gtk_text_forward_delete(text, gtk_text_get_length(text));
 810         gtk_text_thaw(text);
 811
 812         textview_uri_list_remove_all(textview->uri_list);
 813         textview->uri_list = NULL;
 814 }
 815
 816 void textview_destroy(TextView *textview)
 817 {
 818         textview_uri_list_remove_all(textview->uri_list);
 819         textview->uri_list = NULL;
 820
 821         if (!textview->scrolledwin_sb->parent)
 822                 gtk_widget_destroy(textview->scrolledwin_sb);
 823         if (!textview->scrolledwin_mb->parent)
 824                 gtk_widget_destroy(textview->scrolledwin_mb);
 825
 826         if (textview->msgfont) {
 827                 textview->msgfont->ascent = textview->prev_ascent;
 828                 textview->msgfont->descent = textview->prev_descent;
 829                 gdk_font_unref(textview->msgfont);
 830         }
 831         if (textview->boldfont)
 832                 gdk_font_unref(textview->boldfont);
 833
 834         g_free(textview);
 835 }
 836
 837 void textview_set_font(TextView *textview, const gchar *codeset)
 838 {
 839         gboolean use_fontset = TRUE;
 840
 841         /* In multi-byte mode, GtkText can't display 8bit characters
 842            correctly, so it must be single-byte mode. */
 843         if (MB_CUR_MAX > 1) {
 844                 if (codeset) {
 845                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 846                             !g_strncasecmp(codeset, "KOI8-", 5)     ||
 847                             !g_strncasecmp(codeset, "CP", 2)        ||
 848                             !g_strncasecmp(codeset, "WINDOWS-", 8)  ||
 849                             !g_strcasecmp(codeset, "BALTIC"))
 850                                 use_fontset = FALSE;
 851                 }
 852         } else
 853                 use_fontset = FALSE;
 854
 855         if (textview->text_is_mb && !use_fontset) {
 856                 GtkWidget *parent;
 857
 858                 parent = textview->scrolledwin_mb->parent;
 859                 gtk_editable_select_region
 860                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 861                 gtk_container_remove(GTK_CONTAINER(parent),
 862                                      textview->scrolledwin_mb);
 863                 gtk_container_add(GTK_CONTAINER(parent),
 864                                   textview->scrolledwin_sb);
 865
 866                 textview->text = textview->text_sb;
 867                 textview->text_is_mb = FALSE;
 868         } else if (!textview->text_is_mb && use_fontset) {
 869                 GtkWidget *parent;
 870
 871                 parent = textview->scrolledwin_sb->parent;
 872                 gtk_editable_select_region
 873                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 874                 gtk_container_remove(GTK_CONTAINER(parent),
 875                                      textview->scrolledwin_sb);
 876                 gtk_container_add(GTK_CONTAINER(parent),
 877                                   textview->scrolledwin_mb);
 878
 879                 textview->text = textview->text_mb;
 880                 textview->text_is_mb = TRUE;
 881         }
 882
 883         if (prefs_common.textfont) {
 884                 if (textview->msgfont) {
 885                         textview->msgfont->ascent = textview->prev_ascent;
 886                         textview->msgfont->descent = textview->prev_descent;
 887                         gdk_font_unref(textview->msgfont);
 888                         textview->msgfont = NULL;
 889                 }
 890                 if (use_fontset)
 891                         textview->msgfont =
 892                                 gdk_fontset_load(prefs_common.textfont);
 893                 else {
 894                         if (MB_CUR_MAX > 1) {
 895                                 FONT_LOAD(textview->msgfont,
 896                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 897                         } else {
 898                                 FONT_LOAD(textview->msgfont,
 899                                           prefs_common.textfont);
 900                         }
 901                 }
 902
 903                 if (textview->msgfont) {
 904                         gint ascent, descent;
 905
 906                         textview->prev_ascent = textview->msgfont->ascent;
 907                         textview->prev_descent = textview->msgfont->descent;
 908                         descent = prefs_common.line_space / 2;
 909                         ascent  = prefs_common.line_space - descent;
 910                         textview->msgfont->ascent  += ascent;
 911                         textview->msgfont->descent += descent;
 912                 }
 913         }
 914
 915         if (!textview->boldfont)
 916                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 917         if (!spacingfont)
 918                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 919 }
 920
 921 enum
 922 {
 923         H_DATE          = 0,
 924         H_FROM          = 1,
 925         H_TO            = 2,
 926         H_NEWSGROUPS    = 3,
 927         H_SUBJECT       = 4,
 928         H_CC            = 5,
 929         H_REPLY_TO      = 6,
 930         H_FOLLOWUP_TO   = 7,
 931         H_X_MAILER      = 8,
 932         H_X_NEWSREADER  = 9,
 933         H_USER_AGENT    = 10,
 934         H_ORGANIZATION  = 11,
 935 };
 936
 937 void textview_set_position(TextView *textview, gint pos)
 938 {
 939         if (pos < 0) {
 940                 textview->cur_pos =
 941                         gtk_text_get_length(GTK_TEXT(textview->text));
 942         } else {
 943                 textview->cur_pos = pos;
 944         }
 945 }
 946
 947 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
 948 {
 949         gchar buf[BUFFSIZE];
 950         GPtrArray *headers, *sorted_headers;
 951         GSList *disphdr_list;
 952         Header *header;
 953         gint i;
 954
 955         g_return_val_if_fail(fp != NULL, NULL);
 956
 957         if (!prefs_common.display_header) {
 958                 while (fgets(buf, sizeof(buf), fp) != NULL)
 959                         if (buf[0] == '\r' || buf[0] == '\n') break;
 960                 return NULL;
 961         }
 962
 963         headers = procheader_get_header_array_asis(fp);
 964
 965         sorted_headers = g_ptr_array_new();
 966
 967         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
 968              disphdr_list = disphdr_list->next) {
 969                 DisplayHeaderProp *dp =
 970                         (DisplayHeaderProp *)disphdr_list->data;
 971
 972                 for (i = 0; i < headers->len; i++) {
 973                         header = g_ptr_array_index(headers, i);
 974
 975                         if (procheader_headername_equal(header->name,
 976                                                         dp->name)) {
 977                                 if (dp->hidden)
 978                                         procheader_header_free(header);
 979                                 else
 980                                         g_ptr_array_add(sorted_headers, header);
 981
 982                                 g_ptr_array_remove_index(headers, i);
 983                                 i--;
 984                         }
 985                 }
 986         }
 987
 988         if (prefs_common.show_other_header) {
 989                 for (i = 0; i < headers->len; i++) {
 990                         header = g_ptr_array_index(headers, i);
 991                         g_ptr_array_add(sorted_headers, header);
 992                 }
 993         }
 994
 995         g_ptr_array_free(headers, FALSE);
 996
 997         return sorted_headers;
 998 }
 999
1000 static void textview_show_header(TextView *textview, GPtrArray *headers)
1001 {
1002         GtkText *text = GTK_TEXT(textview->text);
1003         Header *header;
1004         gint i;
1005
1006         g_return_if_fail(headers != NULL);
1007
1008         gtk_text_freeze(text);
1009
1010         for (i = 0; i < headers->len; i++) {
1011                 header = g_ptr_array_index(headers, i);
1012                 g_return_if_fail(header->name != NULL);
1013
1014                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
1015                                 header->name, -1);
1016                 if (header->name[strlen(header->name) - 1] != ' ')
1017                         gtk_text_insert(text, textview->boldfont,
1018                                         NULL, NULL, " ", 1);
1019
1020                 if (procheader_headername_equal(header->name, "Subject") ||
1021                     procheader_headername_equal(header->name, "From")    ||
1022                     procheader_headername_equal(header->name, "To")      ||
1023                     procheader_headername_equal(header->name, "Cc"))
1024                         unfold_line(header->body);
1025
1026                 if (prefs_common.enable_color &&
1027                     (procheader_headername_equal(header->name, "X-Mailer") ||
1028                      procheader_headername_equal(header->name,
1029                                                  "X-Newsreader")) &&
1030                     strstr(header->body, "Sylpheed") != NULL)
1031                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1032                                         header->body, -1);
1033                 else if (prefs_common.enable_color) {
1034                         textview_make_clickable_parts(textview,
1035                                                       NULL, NULL, &uri_color,
1036                                                       header->body);
1037                 } else {
1038                         textview_make_clickable_parts(textview,
1039                                                       NULL, NULL, NULL,
1040                                                       header->body);
1041                 }
1042                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1043         }
1044
1045         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1046         gtk_text_thaw(text);
1047         textview->body_pos = gtk_text_get_length(text);
1048 }
1049
1050 gboolean textview_search_string(TextView *textview, const gchar *str,
1051                                 gboolean case_sens)
1052 {
1053         GtkText *text = GTK_TEXT(textview->text);
1054         gint pos;
1055         wchar_t *wcs;
1056         gint len;
1057         gint text_len;
1058         gboolean found = FALSE;
1059
1060         g_return_val_if_fail(str != NULL, FALSE);
1061
1062         wcs = strdup_mbstowcs(str);
1063         g_return_val_if_fail(wcs != NULL, FALSE);
1064         len = wcslen(wcs);
1065         pos = textview->cur_pos;
1066         if (pos < textview->body_pos)
1067                 pos = textview->body_pos;
1068         text_len = gtk_text_get_length(text);
1069         if (text_len - pos < len) {
1070                 g_free(wcs);
1071                 return FALSE;
1072         }
1073
1074         for (; pos < text_len; pos++) {
1075                 if (text_len - pos < len) break;
1076                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1077                     == TRUE) {
1078                         gtk_editable_set_position(GTK_EDITABLE(text),
1079                                                   pos + len);
1080                         gtk_editable_select_region(GTK_EDITABLE(text),
1081                                                    pos, pos + len);
1082                         textview_set_position(textview, pos + len);
1083                         found = TRUE;
1084                         break;
1085                 }
1086                 if (text_len - pos == len) break;
1087         }
1088
1089         g_free(wcs);
1090         return found;
1091 }
1092
1093 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1094                                          gboolean case_sens)
1095 {
1096         GtkText *text = GTK_TEXT(textview->text);
1097         gint pos;
1098         wchar_t *wcs;
1099         gint len;
1100         gint text_len;
1101         gboolean found = FALSE;
1102
1103         g_return_val_if_fail(str != NULL, FALSE);
1104
1105         wcs = strdup_mbstowcs(str);
1106         g_return_val_if_fail(wcs != NULL, FALSE);
1107         len = wcslen(wcs);
1108         pos = textview->cur_pos;
1109         text_len = gtk_text_get_length(text);
1110         if (text_len - textview->body_pos < len) {
1111                 g_free(wcs);
1112                 return FALSE;
1113         }
1114         if (pos <= textview->body_pos || text_len - pos < len)
1115                 pos = text_len - len;
1116
1117         for (; pos >= textview->body_pos; pos--) {
1118                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1119                     == TRUE) {
1120                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1121                         gtk_editable_select_region(GTK_EDITABLE(text),
1122                                                    pos, pos + len);
1123                         textview_set_position(textview, pos - 1);
1124                         found = TRUE;
1125                         break;
1126                 }
1127                 if (pos == textview->body_pos) break;
1128         }
1129
1130         g_free(wcs);
1131         return found;
1132 }
1133
1134 void textview_scroll_one_line(TextView *textview, gboolean up)
1135 {
1136         GtkText *text = GTK_TEXT(textview->text);
1137         gfloat upper;
1138
1139         if (prefs_common.enable_smooth_scroll) {
1140                 textview_smooth_scroll_one_line(textview, up);
1141                 return;
1142         }
1143
1144         if (!up) {
1145                 upper = text->vadj->upper - text->vadj->page_size;
1146                 if (text->vadj->value < upper) {
1147                         text->vadj->value +=
1148                                 text->vadj->step_increment * 4;
1149                         text->vadj->value =
1150                                 MIN(text->vadj->value, upper);
1151                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1152                                                 "value_changed");
1153                 }
1154         } else {
1155                 if (text->vadj->value > 0.0) {
1156                         text->vadj->value -=
1157                                 text->vadj->step_increment * 4;
1158                         text->vadj->value =
1159                                 MAX(text->vadj->value, 0.0);
1160                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1161                                                 "value_changed");
1162                 }
1163         }
1164 }
1165
1166 gboolean textview_scroll_page(TextView *textview, gboolean up)
1167 {
1168         GtkText *text = GTK_TEXT(textview->text);
1169         gfloat upper;
1170         gfloat page_incr;
1171
1172         if (prefs_common.enable_smooth_scroll)
1173                 return textview_smooth_scroll_page(textview, up);
1174
1175         if (prefs_common.scroll_halfpage)
1176                 page_incr = text->vadj->page_increment / 2;
1177         else
1178                 page_incr = text->vadj->page_increment;
1179
1180         if (!up) {
1181                 upper = text->vadj->upper - text->vadj->page_size;
1182                 if (text->vadj->value < upper) {
1183                         text->vadj->value += page_incr;
1184                         text->vadj->value = MIN(text->vadj->value, upper);
1185                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1186                                                 "value_changed");
1187                 } else
1188                         return FALSE;
1189         } else {
1190                 if (text->vadj->value > 0.0) {
1191                         text->vadj->value -= page_incr;
1192                         text->vadj->value = MAX(text->vadj->value, 0.0);
1193                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1194                                                 "value_changed");
1195                 } else
1196                         return FALSE;
1197         }
1198
1199         return TRUE;
1200 }
1201
1202 static void textview_smooth_scroll_do(TextView *textview,
1203                                       gfloat old_value, gfloat last_value,
1204                                       gint step)
1205 {
1206         GtkText *text = GTK_TEXT(textview->text);
1207         gint change_value;
1208         gboolean up;
1209         gint i;
1210
1211         if (old_value < last_value) {
1212                 change_value = last_value - old_value;
1213                 up = FALSE;
1214         } else {
1215                 change_value = old_value - last_value;
1216                 up = TRUE;
1217         }
1218
1219         gdk_key_repeat_disable();
1220
1221         for (i = step; i <= change_value; i += step) {
1222                 text->vadj->value = old_value + (up ? -i : i);
1223                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1224                                         "value_changed");
1225         }
1226
1227         text->vadj->value = last_value;
1228         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1229
1230         gdk_key_repeat_restore();
1231 }
1232
1233 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1234 {
1235         GtkText *text = GTK_TEXT(textview->text);
1236         gfloat upper;
1237         gfloat old_value;
1238         gfloat last_value;
1239
1240         if (!up) {
1241                 upper = text->vadj->upper - text->vadj->page_size;
1242                 if (text->vadj->value < upper) {
1243                         old_value = text->vadj->value;
1244                         last_value = text->vadj->value +
1245                                 text->vadj->step_increment * 4;
1246                         last_value = MIN(last_value, upper);
1247
1248                         textview_smooth_scroll_do(textview, old_value,
1249                                                   last_value,
1250                                                   prefs_common.scroll_step);
1251                 }
1252         } else {
1253                 if (text->vadj->value > 0.0) {
1254                         old_value = text->vadj->value;
1255                         last_value = text->vadj->value -
1256                                 text->vadj->step_increment * 4;
1257                         last_value = MAX(last_value, 0.0);
1258
1259                         textview_smooth_scroll_do(textview, old_value,
1260                                                   last_value,
1261                                                   prefs_common.scroll_step);
1262                 }
1263         }
1264 }
1265
1266 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1267 {
1268         GtkText *text = GTK_TEXT(textview->text);
1269         gfloat upper;
1270         gfloat page_incr;
1271         gfloat old_value;
1272         gfloat last_value;
1273
1274         if (prefs_common.scroll_halfpage)
1275                 page_incr = text->vadj->page_increment / 2;
1276         else
1277                 page_incr = text->vadj->page_increment;
1278
1279         if (!up) {
1280                 upper = text->vadj->upper - text->vadj->page_size;
1281                 if (text->vadj->value < upper) {
1282                         old_value = text->vadj->value;
1283                         last_value = text->vadj->value + page_incr;
1284                         last_value = MIN(last_value, upper);
1285
1286                         textview_smooth_scroll_do(textview, old_value,
1287                                                   last_value,
1288                                                   prefs_common.scroll_step);
1289                 } else
1290                         return FALSE;
1291         } else {
1292                 if (text->vadj->value > 0.0) {
1293                         old_value = text->vadj->value;
1294                         last_value = text->vadj->value - page_incr;
1295                         last_value = MAX(last_value, 0.0);
1296
1297                         textview_smooth_scroll_do(textview, old_value,
1298                                                   last_value,
1299                                                   prefs_common.scroll_step);
1300                 } else
1301                         return FALSE;
1302         }
1303
1304         return TRUE;
1305 }
1306
1307 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1308                                  TextView *textview)
1309 {
1310         SummaryView *summaryview = NULL;
1311
1312         if (!event) return;
1313         if (textview->messageview->mainwin)
1314                 summaryview = textview->messageview->mainwin->summaryview;
1315
1316         switch (event->keyval) {
1317         case GDK_Tab:
1318         case GDK_Home:
1319         case GDK_Left:
1320         case GDK_Up:
1321         case GDK_Right:
1322         case GDK_Down:
1323         case GDK_Page_Up:
1324         case GDK_Page_Down:
1325         case GDK_End:
1326         case GDK_Control_L:
1327         case GDK_Control_R:
1328                 break;
1329         case GDK_space:
1330                 if (summaryview)
1331                         summary_pass_key_press_event(summaryview, event);
1332                 else
1333                         textview_scroll_page(textview, FALSE);
1334                 break;
1335         case GDK_BackSpace:
1336         case GDK_Delete:
1337                 textview_scroll_page(textview, TRUE);
1338                 break;
1339         case GDK_Return:
1340                 textview_scroll_one_line(textview,
1341                                          (event->state & GDK_MOD1_MASK) != 0);
1342                 break;
1343         default:
1344                 if (summaryview)
1345                         summary_pass_key_press_event(summaryview, event);
1346                 break;
1347         }
1348 }
1349
1350 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1351                                     TextView *textview)
1352 {
1353         textview->cur_pos =
1354                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1355
1356         if (event &&
1357             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1358              || event->button == 2 || event->button == 3)) {
1359                 GSList *cur;
1360
1361                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1362                         RemoteURI *uri = (RemoteURI *)cur->data;
1363
1364                         if (textview->cur_pos >= uri->start &&
1365                             textview->cur_pos <  uri->end) {
1366                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1367                                         if (event->button == 3) {
1368                                                 gchar *fromname, *fromaddress;
1369                                                 /* extract url */
1370                                                 fromaddress = g_strdup(uri->uri + 7);
1371                                                 /* Hiroyuki: please put this function in utils.c! */
1372                                                 fromname = procheader_get_fromname(fromaddress);
1373                                                 extract_address(fromaddress);
1374                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1375                                                 // Add to address book - Match
1376                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1377                                                 g_free(fromaddress);
1378                                                 g_free(fromname);
1379                                         } else {
1380                                                 compose_new_with_recipient
1381                                                         (NULL, uri->uri + 7);
1382                                         }
1383                                 } else {
1384                                         open_uri(uri->uri,
1385                                                  prefs_common.uri_cmd);
1386                                 }
1387                         }
1388                 }
1389         }
1390 }
1391
1392 static void textview_uri_list_remove_all(GSList *uri_list)
1393 {
1394         GSList *cur;
1395
1396         for (cur = uri_list; cur != NULL; cur = cur->next) {
1397                 if (cur->data) {
1398                         g_free(((RemoteURI *)cur->data)->uri);
1399                         g_free(cur->data);
1400                 }
1401         }
1402
1403         g_slist_free(uri_list);
1404 }