src/textview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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
  50 #define FONT_LOAD(font, s) \
  51 { \
  52         gchar *fontstr, *p; \
  53  \
  54         Xstrdup_a(fontstr, s, ); \
  55         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  56         font = gdk_font_load(fontstr); \
  57 }
  58
  59 typedef struct _RemoteURI       RemoteURI;
  60
  61 struct _RemoteURI
  62 {
  63         gchar *uri;
  64
  65         guint start;
  66         guint end;
  67 };
  68
  69 static GdkColor quote_colors[3] = {
  70         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  71         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  72         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  73 };
  74
  75 static GdkColor uri_color = {
  76         (gulong)0,
  77         (gushort)0,
  78         (gushort)0,
  79         (gushort)0
  80 };
  81
  82 static GdkColor emphasis_color = {
  83         (gulong)0,
  84         (gushort)0,
  85         (gushort)0,
  86         (gushort)0xcfff
  87 };
  88
  89 static GdkColor error_color = {
  90         (gulong)0,
  91         (gushort)0xefff,
  92         (gushort)0,
  93         (gushort)0
  94 };
  95
  96 static GdkFont *spacingfont;
  97
  98 static void textview_show_html          (TextView       *textview,
  99                                          FILE           *fp,
 100                                          CodeConverter  *conv);
 101 static void textview_write_line         (TextView       *textview,
 102                                          const gchar    *str,
 103                                          CodeConverter  *conv);
 104 static GPtrArray *textview_scan_header  (TextView       *textview,
 105                                          FILE           *fp);
 106 static void textview_show_header        (TextView       *textview,
 107                                          GPtrArray      *headers);
 108
 109 static void textview_key_pressed        (GtkWidget      *widget,
 110                                          GdkEventKey    *event,
 111                                          TextView       *textview);
 112 static void textview_button_pressed     (GtkWidget      *widget,
 113                                          GdkEventButton *event,
 114                                          TextView       *textview);
 115
 116 static void textview_uri_list_remove_all(GSList         *uri_list);
 117
 118 static void textview_smooth_scroll_do           (TextView       *textview,
 119                                                  gfloat          old_value,
 120                                                  gfloat          last_value,
 121                                                  gint            step);
 122 static void textview_smooth_scroll_one_line     (TextView       *textview,
 123                                                  gboolean        up);
 124 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 125                                                  gboolean        up);
 126
 127
 128 TextView *textview_create(void)
 129 {
 130         TextView *textview;
 131         GtkWidget *vbox;
 132         GtkWidget *scrolledwin_sb;
 133         GtkWidget *scrolledwin_mb;
 134         GtkWidget *text_sb;
 135         GtkWidget *text_mb;
 136
 137         debug_print(_("Creating text view...\n"));
 138         textview = g_new0(TextView, 1);
 139
 140         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 141         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 142         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 143                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 144         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 145                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 146         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 147         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 148
 149         /* create GtkText widgets for single-byte and multi-byte character */
 150         text_sb = gtk_text_new(NULL, NULL);
 151         text_mb = gtk_text_new(NULL, NULL);
 152         gtk_widget_show(text_sb);
 153         gtk_widget_show(text_mb);
 154         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 155         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 156         gtk_widget_ensure_style(text_sb);
 157         gtk_widget_ensure_style(text_mb);
 158         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 159                 GtkStyle *style;
 160
 161                 style = gtk_style_copy(text_sb->style);
 162                 gdk_font_unref(style->font);
 163                 FONT_LOAD(style->font, NORMAL_FONT);
 164                 gtk_widget_set_style(text_sb, style);
 165         }
 166         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 167                 GtkStyle *style;
 168
 169                 style = gtk_style_copy(text_mb->style);
 170                 gdk_font_unref(style->font);
 171                 style->font = gdk_fontset_load(NORMAL_FONT);
 172                 gtk_widget_set_style(text_mb, style);
 173         }
 174         gtk_widget_ref(scrolledwin_sb);
 175         gtk_widget_ref(scrolledwin_mb);
 176
 177         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 178         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 179         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 180                            GTK_SIGNAL_FUNC(textview_key_pressed),
 181                            textview);
 182         gtk_signal_connect(GTK_OBJECT(text_sb), "button_press_event",
 183                            GTK_SIGNAL_FUNC(textview_button_pressed),
 184                            textview);
 185         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 186                            GTK_SIGNAL_FUNC(textview_key_pressed),
 187                            textview);
 188         gtk_signal_connect(GTK_OBJECT(text_mb), "button_press_event",
 189                            GTK_SIGNAL_FUNC(textview_button_pressed),
 190                            textview);
 191
 192         gtk_widget_show(scrolledwin_sb);
 193         gtk_widget_show(scrolledwin_mb);
 194
 195         vbox = gtk_vbox_new(FALSE, 0);
 196         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 197
 198         textview->vbox           = vbox;
 199         textview->scrolledwin    = scrolledwin_sb;
 200         textview->scrolledwin_sb = scrolledwin_sb;
 201         textview->scrolledwin_mb = scrolledwin_mb;
 202         textview->text           = text_sb;
 203         textview->text_sb        = text_sb;
 204         textview->text_mb        = text_mb;
 205         textview->text_is_mb     = FALSE;
 206         textview->uri_list       = NULL;
 207
 208         return textview;
 209 }
 210
 211 void textview_init(TextView *textview)
 212 {
 213         gtkut_widget_disable_theme_engine(textview->text_sb);
 214         gtkut_widget_disable_theme_engine(textview->text_mb);
 215         textview_update_message_colors();
 216         textview_set_font(textview, NULL);
 217 }
 218
 219 void textview_update_message_colors(void)
 220 {
 221         GdkColor black = {0, 0, 0, 0};
 222
 223         if (prefs_common.enable_color) {
 224                 /* grab the quote colors, converting from an int to a GdkColor */
 225                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 226                                                &quote_colors[0]);
 227                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 228                                                &quote_colors[1]);
 229                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 230                                                &quote_colors[2]);
 231                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 232                                                &uri_color);
 233         } else {
 234                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 235                         uri_color = emphasis_color = black;
 236         }
 237 }
 238
 239 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 240                            const gchar *file)
 241 {
 242         FILE *fp;
 243
 244         if ((fp = fopen(file, "r")) == NULL) {
 245                 FILE_OP_ERROR(file, "fopen");
 246                 return;
 247         }
 248
 249         textview_show_part(textview, mimeinfo, fp);
 250
 251         fclose(fp);
 252 }
 253
 254 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 255 {
 256         GtkText *text;
 257         gchar buf[BUFFSIZE];
 258         const gchar *boundary = NULL;
 259         gint boundary_len = 0;
 260         const gchar *charset = NULL;
 261         FILE *tmpfp;
 262         GPtrArray *headers = NULL;
 263         CodeConverter *conv;
 264
 265         g_return_if_fail(mimeinfo != NULL);
 266         g_return_if_fail(fp != NULL);
 267
 268         if (mimeinfo->mime_type == MIME_MULTIPART) {
 269                 if (mimeinfo->sub) {
 270                         mimeinfo = mimeinfo->sub;
 271                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 272                                 perror("fseek");
 273                                 return;
 274                         }
 275                 } else
 276                         return;
 277         }
 278         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 279                 boundary = mimeinfo->parent->boundary;
 280                 boundary_len = strlen(boundary);
 281         }
 282
 283         if (!boundary && mimeinfo->mime_type == MIME_TEXT) {
 284                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 285                         perror("fseek");
 286                 headers = textview_scan_header(textview, fp);
 287         } else {
 288                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 289                         glong fpos;
 290
 291                         if ((fpos = ftell(fp)) < 0)
 292                                 perror("ftell");
 293                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
 294                                  < 0)
 295                                 perror("fseek");
 296                         else {
 297                                 headers = textview_scan_header(textview, fp);
 298                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 299                                         perror("fseek");
 300                         }
 301                 }
 302                 while (fgets(buf, sizeof(buf), fp) != NULL)
 303                         if (buf[0] == '\r' || buf[0] == '\n') break;
 304         }
 305
 306         /* display attached RFC822 single text message */
 307         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 308                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 309                 headers = textview_scan_header(textview, fp);
 310                 mimeinfo = mimeinfo->sub;
 311         } else if (!mimeinfo->parent &&
 312                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 313                 if (!mimeinfo->sub) return;
 314                 headers = textview_scan_header(textview, fp);
 315                 mimeinfo = mimeinfo->sub;
 316         }
 317
 318         if (prefs_common.force_charset)
 319                 charset = prefs_common.force_charset;
 320         else if (mimeinfo->charset)
 321                 charset = mimeinfo->charset;
 322         textview_set_font(textview, charset);
 323
 324         conv = conv_code_converter_new(charset);
 325
 326         textview_clear(textview);
 327         text = GTK_TEXT(textview->text);
 328         gtk_text_freeze(text);
 329
 330         if (headers) {
 331                 gint i;
 332
 333                 textview_show_header(textview, headers);
 334                 for (i = 0; i < headers->len; i++) {
 335                         Header *header = g_ptr_array_index(headers, i);
 336                         g_free(header->body);
 337                         g_free(header->name);
 338                         g_free(header);
 339                 }
 340                 g_ptr_array_free(headers, TRUE);
 341         }
 342
 343         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 344         if (tmpfp) {
 345                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 346                         textview_show_html(textview, tmpfp, conv);
 347                 else
 348                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 349                                 textview_write_line(textview, buf, conv);
 350                 fclose(tmpfp);
 351         }
 352
 353         conv_code_converter_destroy(conv);
 354
 355         gtk_text_thaw(text);
 356 }
 357
 358 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 359 {
 360         GtkText *text;
 361
 362         if (!partinfo) return;
 363
 364         textview_set_font(textview, NULL);
 365         text = GTK_TEXT(textview->text);
 366         textview_clear(textview);
 367
 368         gtk_text_freeze(text);
 369
 370         gtk_text_insert
 371                 (text, textview->msgfont, NULL, NULL,
 372                  _("To save this part, pop up the context menu with\n"), -1);
 373         gtk_text_insert
 374                 (text, textview->msgfont, NULL, NULL,
 375                  _("right click and select `Save as...', or press `y' key.\n\n"), -1);
 376
 377         gtk_text_insert
 378                 (text, textview->msgfont, NULL, NULL,
 379                  _("To display this part as a text message, select\n"), -1);
 380         gtk_text_insert
 381                 (text, textview->msgfont, NULL, NULL,
 382                  _("`Display as text', or press `t' key.\n\n"), -1);
 383
 384         gtk_text_insert
 385                 (text, textview->msgfont, NULL, NULL,
 386                  _("To open this part with external program, select `Open',\n"), -1);
 387         gtk_text_insert
 388                 (text, textview->msgfont, NULL, NULL,
 389                  _("or double-click, or click the center button, or press `l' key."), -1);
 390
 391         gtk_text_thaw(text);
 392 }
 393
 394 #if USE_GPGME
 395 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 396 {
 397         GtkText *text;
 398
 399         if (!partinfo) return;
 400
 401         textview_set_font(textview, NULL);
 402         text = GTK_TEXT(textview->text);
 403         textview_clear(textview);
 404
 405         gtk_text_freeze(text);
 406
 407         if (partinfo->sigstatus_full == NULL) {
 408                 gtk_text_insert
 409                         (text, textview->msgfont, NULL, NULL,
 410                          _("This signature has not been checked yet.\n"), -1);
 411                 gtk_text_insert
 412                         (text, textview->msgfont, NULL, NULL,
 413                          _("To check it, pop up the context menu with\n"), -1);
 414                 gtk_text_insert
 415                         (text, textview->msgfont, NULL, NULL,
 416                          _("right click and select `Check signature'.\n"), -1);
 417         } else {
 418                 gtk_text_insert(text, textview->msgfont, NULL, NULL,
 419                                 partinfo->sigstatus_full, -1);
 420         }
 421
 422         gtk_text_thaw(text);
 423 }
 424 #endif /* USE_GPGME */
 425
 426 static void textview_show_html(TextView *textview, FILE *fp,
 427                                CodeConverter *conv)
 428 {
 429         HTMLParser *parser;
 430         gchar *str;
 431
 432         parser = html_parser_new(fp, conv);
 433         g_return_if_fail(parser != NULL);
 434
 435         while ((str = html_parse(parser)) != NULL) {
 436                 textview_write_line(textview, str, NULL);
 437         }
 438         html_parser_destroy(parser);
 439 }
 440
 441 /* get_uri_part() - retrieves a URI starting from scanpos.
 442                     Returns TRUE if succesful */
 443 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 444                              const gchar **bp, const gchar **ep)
 445 {
 446         const gchar *ep_;
 447
 448         g_return_val_if_fail(start != NULL, FALSE);
 449         g_return_val_if_fail(scanpos != NULL, FALSE);
 450         g_return_val_if_fail(bp != NULL, FALSE);
 451         g_return_val_if_fail(ep != NULL, FALSE);
 452
 453         *bp = scanpos;
 454
 455         /* find end point of URI */
 456         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 457                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 458                         break;
 459         }
 460
 461         /* no punctuation at end of string */
 462
 463         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 464          * should pass some URI type to this function and decide on that whether
 465          * to perform punctuation stripping */
 466
 467 #define IS_REAL_PUNCT(ch) \
 468         (ispunct(ch) && ((ch) != '/'))
 469
 470         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 471                 ;
 472
 473 #undef IS_REAL_PUNCT
 474
 475         *ep = ep_;
 476
 477         return TRUE;
 478 }
 479
 480 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 481 {
 482         return g_strndup(bp, ep - bp);
 483 }
 484
 485 /* valid mail address characters */
 486 #define IS_RFC822_CHAR(ch) \
 487         (isascii(ch) && \
 488          (ch) > 32   && \
 489          (ch) != 127 && \
 490          !isspace(ch) && \
 491          !strchr("()<>\"", (ch)))
 492
 493 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 494 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 495                                const gchar **bp, const gchar **ep)
 496 {
 497         /* more complex than the uri part because we need to scan back and forward starting from
 498          * the scan position. */
 499         gboolean result = FALSE;
 500         const gchar *bp_;
 501         const gchar *ep_;
 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         return result;
 535 }
 536
 537 #undef IS_RFC822_CHAR
 538
 539 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 540 {
 541         /* returns a mailto: URI; mailto: is also used to detect the
 542          * uri type later on in the button_pressed signal handler */
 543         gchar *tmp;
 544         gchar *result;
 545
 546         tmp = g_strndup(bp, ep - bp);
 547         result = g_strconcat("mailto:", tmp, NULL);
 548         g_free(tmp);
 549
 550         return result;
 551 }
 552
 553 #define ADD_TXT_POS(bp_, ep_, pti_) \
 554         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 555                 last = last->next; \
 556                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 557                 last->next = NULL; \
 558         } else { \
 559                 g_warning("alloc error scanning URIs\n"); \
 560                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 561                                 linebuf, -1); \
 562                 return; \
 563         }
 564
 565 /* textview_make_clickable_parts() - colorizes clickable parts */
 566 static void textview_make_clickable_parts(TextView *textview, GtkText *text,
 567                                           GdkColor *fg_color,
 568                                           GdkColor *uri_color,
 569                                           const gchar *linebuf)
 570 {
 571         /* parse table - in order of priority */
 572         struct table {
 573                 const gchar *needle; /* token */
 574
 575                 /* token search function */
 576                 gchar    *(*search)     (const gchar *haystack,
 577                                          const gchar *needle);
 578                 /* part parsing function */
 579                 gboolean  (*parse)      (const gchar *start,
 580                                          const gchar *scanpos,
 581                                          const gchar **bp_,
 582                                          const gchar **ep_);
 583                 /* part to URI function */
 584                 gchar    *(*build_uri)  (const gchar *bp,
 585                                          const gchar *ep);
 586         };
 587
 588         static struct table parser[] = {
 589                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 590                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 591                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 592                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 593                 {"@",        strcasestr, get_email_part, make_email_string}
 594         };
 595         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 596
 597         gint  n;
 598         const gchar *walk, *bp, *ep;
 599
 600         struct txtpos {
 601                 const gchar     *bp, *ep;       /* text position */
 602                 gint             pti;           /* index in parse table */
 603                 struct txtpos   *next;          /* next */
 604         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 605
 606         /* parse for clickable parts, and build a list of begin and end positions  */
 607         for (walk = linebuf, n = 0;;) {
 608                 gint last_index = PARSE_ELEMS;
 609                 gchar *scanpos = NULL;
 610
 611                 /* FIXME: this looks phony. scanning for anything in the parse table */
 612                 for (n = 0; n < PARSE_ELEMS; n++) {
 613                         gchar *tmp;
 614
 615                         tmp = parser[n].search(walk, parser[n].needle);
 616                         if (tmp) {
 617                                 if (scanpos == NULL || tmp < scanpos) {
 618                                         scanpos = tmp;
 619                                         last_index = n;
 620                                 }
 621                         }
 622                 }
 623
 624                 if (scanpos) {
 625                         /* check if URI can be parsed */
 626                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 627                             && (ep - bp - 1) > strlen(parser[n].needle)) {
 628                                         ADD_TXT_POS(bp, ep, last_index);
 629                                         walk = ep;
 630                         } else
 631                                 walk = scanpos +
 632                                         strlen(parser[last_index].needle);
 633                 } else
 634                         break;
 635         }
 636
 637         /* colorize this line */
 638         if (head.next) {
 639                 const gchar *normal_text = linebuf;
 640
 641                 /* insert URIs */
 642                 for (last = head.next; last != NULL;
 643                      normal_text = last->ep, last = last->next) {
 644                         RemoteURI *uri;
 645
 646                         uri = g_new(RemoteURI, 1);
 647                         if (last->bp - normal_text > 0)
 648                                 gtk_text_insert(text, textview->msgfont,
 649                                                 fg_color, NULL,
 650                                                 normal_text,
 651                                                 last->bp - normal_text);
 652                         uri->uri = parser[last->pti].build_uri(last->bp, last->ep);
 653                         uri->start = gtk_text_get_point(text);
 654                         gtk_text_insert(text, textview->msgfont, uri_color,
 655                                         NULL, last->bp, last->ep - last->bp);
 656                         uri->end = gtk_text_get_point(text);
 657                         textview->uri_list =
 658                                 g_slist_append(textview->uri_list, uri);
 659                 }
 660
 661                 if (*normal_text)
 662                         gtk_text_insert(text, textview->msgfont, fg_color,
 663                                         NULL, normal_text, -1);
 664         } else
 665                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
 666                                 linebuf, -1);
 667 }
 668
 669 #undef ADD_TXT_POS
 670
 671 static void textview_write_line(TextView *textview, const gchar *str,
 672                                 CodeConverter *conv)
 673 {
 674         GtkText *text = GTK_TEXT(textview->text);
 675         gchar buf[BUFFSIZE];
 676         size_t len;
 677         GdkColor *fg_color;
 678         gint quotelevel = -1;
 679
 680         if (!conv)
 681                 strncpy2(buf, str, sizeof(buf));
 682         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 683                 gtk_text_insert(text, textview->msgfont,
 684                                 prefs_common.enable_color
 685                                 ? &error_color : NULL, NULL,
 686                                 "*** Warning: code conversion failed ***\n",
 687                                 -1);
 688                 return;
 689         }
 690
 691         len = strlen(buf);
 692         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 693                 buf[len - 2] = '\n';
 694                 buf[len - 1] = '\0';
 695         }
 696         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 697         fg_color = NULL;
 698
 699         /* change color of quotation
 700            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 701            Up to 3 levels of quotations are detected, and each
 702            level is colored using a different color. */
 703         if (prefs_common.enable_color && strchr(buf, '>')) {
 704                 quotelevel = get_quote_level(buf);
 705
 706                 /* set up the correct foreground color */
 707                 if (quotelevel > 2) {
 708                         /* recycle colors */
 709                         if (prefs_common.recycle_quote_colors)
 710                                 quotelevel %= 3;
 711                         else
 712                                 quotelevel = 2;
 713                 }
 714         }
 715
 716         if (quotelevel == -1)
 717                 fg_color = NULL;
 718         else
 719                 fg_color = &quote_colors[quotelevel];
 720
 721         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 722                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 723
 724         if (prefs_common.enable_color)
 725                 textview_make_clickable_parts(textview, text,
 726                                               fg_color, &uri_color, buf);
 727         else
 728                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
 729                                 buf, -1);
 730 }
 731
 732 void textview_clear(TextView *textview)
 733 {
 734         GtkText *text = GTK_TEXT(textview->text);
 735
 736         gtk_text_freeze(text);
 737         gtk_text_backward_delete(text, gtk_text_get_length(text));
 738         gtk_text_thaw(text);
 739
 740         textview_uri_list_remove_all(textview->uri_list);
 741         textview->uri_list = NULL;
 742 }
 743
 744 void textview_destroy(TextView *textview)
 745 {
 746         textview_uri_list_remove_all(textview->uri_list);
 747         textview->uri_list = NULL;
 748
 749         if (!textview->scrolledwin_sb->parent)
 750                 gtk_widget_destroy(textview->scrolledwin_sb);
 751         if (!textview->scrolledwin_mb->parent)
 752                 gtk_widget_destroy(textview->scrolledwin_mb);
 753
 754         if (textview->msgfont) {
 755                 textview->msgfont->ascent = textview->prev_ascent;
 756                 textview->msgfont->descent = textview->prev_descent;
 757                 gdk_font_unref(textview->msgfont);
 758         }
 759         if (textview->boldfont)
 760                 gdk_font_unref(textview->boldfont);
 761
 762         g_free(textview);
 763 }
 764
 765 void textview_set_font(TextView *textview, const gchar *codeset)
 766 {
 767         gboolean use_fontset = TRUE;
 768
 769         /* In multi-byte mode, GtkText can't display 8bit characters
 770            correctly, so it must be single-byte mode. */
 771         if (MB_CUR_MAX > 1) {
 772                 if (codeset) {
 773                         if (!strncasecmp(codeset, "ISO-8859-", 9) ||
 774                             !strncasecmp(codeset, "KOI8-", 5)     ||
 775                             !strncasecmp(codeset, "CP", 2)        ||
 776                             !strncasecmp(codeset, "WINDOWS-", 8)  ||
 777                             !strcasecmp(codeset, "BALTIC"))
 778                                 use_fontset = FALSE;
 779                 }
 780         } else
 781                 use_fontset = FALSE;
 782
 783         if (textview->text_is_mb && !use_fontset) {
 784                 GtkWidget *parent;
 785
 786                 parent = textview->scrolledwin_mb->parent;
 787                 gtk_editable_select_region
 788                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 789                 gtk_container_remove(GTK_CONTAINER(parent),
 790                                      textview->scrolledwin_mb);
 791                 gtk_container_add(GTK_CONTAINER(parent),
 792                                   textview->scrolledwin_sb);
 793
 794                 textview->text = textview->text_sb;
 795                 textview->text_is_mb = FALSE;
 796         } else if (!textview->text_is_mb && use_fontset) {
 797                 GtkWidget *parent;
 798
 799                 parent = textview->scrolledwin_sb->parent;
 800                 gtk_editable_select_region
 801                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 802                 gtk_container_remove(GTK_CONTAINER(parent),
 803                                      textview->scrolledwin_sb);
 804                 gtk_container_add(GTK_CONTAINER(parent),
 805                                   textview->scrolledwin_mb);
 806
 807                 textview->text = textview->text_mb;
 808                 textview->text_is_mb = TRUE;
 809         }
 810
 811         if (prefs_common.textfont) {
 812                 if (textview->msgfont) {
 813                         textview->msgfont->ascent = textview->prev_ascent;
 814                         textview->msgfont->descent = textview->prev_descent;
 815                         gdk_font_unref(textview->msgfont);
 816                         textview->msgfont = NULL;
 817                 }
 818                 if (use_fontset)
 819                         textview->msgfont =
 820                                 gdk_fontset_load(prefs_common.textfont);
 821                 else {
 822                         if (MB_CUR_MAX > 1) {
 823                                 FONT_LOAD(textview->msgfont,
 824                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 825                         } else {
 826                                 FONT_LOAD(textview->msgfont,
 827                                           prefs_common.textfont);
 828                         }
 829                 }
 830
 831                 if (textview->msgfont) {
 832                         gint ascent, descent;
 833
 834                         textview->prev_ascent = textview->msgfont->ascent;
 835                         textview->prev_descent = textview->msgfont->descent;
 836                         descent = prefs_common.line_space / 2;
 837                         ascent  = prefs_common.line_space - descent;
 838                         textview->msgfont->ascent  += ascent;
 839                         textview->msgfont->descent += descent;
 840                 }
 841         }
 842
 843         if (!textview->boldfont)
 844                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 845         if (!spacingfont)
 846                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 847 }
 848
 849 enum
 850 {
 851         H_DATE          = 0,
 852         H_FROM          = 1,
 853         H_TO            = 2,
 854         H_NEWSGROUPS    = 3,
 855         H_SUBJECT       = 4,
 856         H_CC            = 5,
 857         H_REPLY_TO      = 6,
 858         H_FOLLOWUP_TO   = 7,
 859         H_X_MAILER      = 8,
 860         H_X_NEWSREADER  = 9,
 861         H_USER_AGENT    = 10,
 862         H_ORGANIZATION  = 11,
 863 };
 864
 865 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
 866 {
 867         static HeaderEntry hentry[] = {{"Date:",         NULL, FALSE},
 868                                        {"From:",         NULL, TRUE},
 869                                        {"To:",           NULL, FALSE},
 870                                        {"Newsgroups:",   NULL, FALSE},
 871                                        {"Subject:",      NULL, TRUE},
 872                                        {"Cc:",           NULL, FALSE},
 873                                        {"Reply-To:",     NULL, FALSE},
 874                                        {"Followup-To:",  NULL, FALSE},
 875                                        {"X-Mailer:",     NULL, TRUE},
 876                                        {"X-Newsreader:", NULL, TRUE},
 877                                        {"User-Agent:",   NULL, TRUE},
 878                                        {"Organization:", NULL, TRUE},
 879                                        {NULL,            NULL, FALSE}};
 880         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 881         gint hnum;
 882         HeaderEntry *hp;
 883         GPtrArray *headers;
 884
 885         g_return_val_if_fail(fp != NULL, NULL);
 886
 887         if (!prefs_common.display_header) {
 888                 while (fgets(buf, sizeof(buf), fp) != NULL)
 889                         if (buf[0] == '\r' || buf[0] == '\n') break;
 890                 return NULL;
 891         }
 892
 893         headers = g_ptr_array_new();
 894
 895         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 896                != -1) {
 897                 Header *header;
 898
 899                 hp = hentry + hnum;
 900
 901                 header = g_new(Header, 1);
 902                 header->name = g_strndup(buf, strlen(hp->name));
 903                 conv_unmime_header(tmp, sizeof(tmp), buf + strlen(hp->name),
 904                                    NULL);
 905                 header->body = g_strdup(tmp);
 906
 907                 g_ptr_array_add(headers, header);
 908         }
 909
 910         return headers;
 911 }
 912
 913 static void textview_show_header(TextView *textview, GPtrArray *headers)
 914 {
 915         GtkText *text = GTK_TEXT(textview->text);
 916         Header *header;
 917         gint i;
 918
 919         g_return_if_fail(headers != NULL);
 920
 921         gtk_text_freeze(text);
 922
 923         for (i = 0; i < headers->len; i++) {
 924                 header = g_ptr_array_index(headers, i);
 925                 g_return_if_fail(header->name != NULL);
 926
 927                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
 928                                 header->name, -1);
 929                 if (prefs_common.enable_color &&
 930                     (strncmp(header->name, "X-Mailer", 8) == 0 ||
 931                      strncmp(header->name, "X-Newsreader", 12) == 0) &&
 932                     strstr(header->body, "Sylpheed") != NULL)
 933                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
 934                                         header->body, -1);
 935                 else
 936                         gtk_text_insert(text, NULL, NULL, NULL,
 937                                         header->body, -1);
 938                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
 939         }
 940
 941         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
 942         gtk_text_thaw(text);
 943 }
 944
 945 void textview_scroll_one_line(TextView *textview, gboolean up)
 946 {
 947         GtkText *text = GTK_TEXT(textview->text);
 948         gfloat upper;
 949
 950         if (prefs_common.enable_smooth_scroll) {
 951                 textview_smooth_scroll_one_line(textview, up);
 952                 return;
 953         }
 954
 955         if (!up) {
 956                 upper = text->vadj->upper - text->vadj->page_size;
 957                 if (text->vadj->value < upper) {
 958                         text->vadj->value +=
 959                                 text->vadj->step_increment * 4;
 960                         text->vadj->value =
 961                                 MIN(text->vadj->value, upper);
 962                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
 963                                                 "value_changed");
 964                 }
 965         } else {
 966                 if (text->vadj->value > 0.0) {
 967                         text->vadj->value -=
 968                                 text->vadj->step_increment * 4;
 969                         text->vadj->value =
 970                                 MAX(text->vadj->value, 0.0);
 971                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
 972                                                 "value_changed");
 973                 }
 974         }
 975 }
 976
 977 gboolean textview_scroll_page(TextView *textview, gboolean up)
 978 {
 979         GtkText *text = GTK_TEXT(textview->text);
 980         gfloat upper;
 981         gfloat page_incr;
 982
 983         if (prefs_common.enable_smooth_scroll)
 984                 return textview_smooth_scroll_page(textview, up);
 985
 986         if (prefs_common.scroll_halfpage)
 987                 page_incr = text->vadj->page_increment / 2;
 988         else
 989                 page_incr = text->vadj->page_increment;
 990
 991         if (!up) {
 992                 upper = text->vadj->upper - text->vadj->page_size;
 993                 if (text->vadj->value < upper) {
 994                         text->vadj->value += page_incr;
 995                         text->vadj->value = MIN(text->vadj->value, upper);
 996                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
 997                                                 "value_changed");
 998                 } else
 999                         return FALSE;
1000         } else {
1001                 if (text->vadj->value > 0.0) {
1002                         text->vadj->value -= page_incr;
1003                         text->vadj->value = MAX(text->vadj->value, 0.0);
1004                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1005                                                 "value_changed");
1006                 } else
1007                         return FALSE;
1008         }
1009
1010         return TRUE;
1011 }
1012
1013 static void textview_smooth_scroll_do(TextView *textview,
1014                                       gfloat old_value, gfloat last_value,
1015                                       gint step)
1016 {
1017         GtkText *text = GTK_TEXT(textview->text);
1018         gint change_value;
1019         gboolean up;
1020         gint i;
1021
1022         if (old_value < last_value) {
1023                 change_value = last_value - old_value;
1024                 up = FALSE;
1025         } else {
1026                 change_value = old_value - last_value;
1027                 up = TRUE;
1028         }
1029
1030         gdk_key_repeat_disable();
1031
1032         for (i = step; i <= change_value; i += step) {
1033                 text->vadj->value = old_value + (up ? -i : i);
1034                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1035                                         "value_changed");
1036         }
1037
1038         text->vadj->value = last_value;
1039         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1040
1041         gdk_key_repeat_restore();
1042 }
1043
1044 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1045 {
1046         GtkText *text = GTK_TEXT(textview->text);
1047         gfloat upper;
1048         gfloat old_value;
1049         gfloat last_value;
1050
1051         if (!up) {
1052                 upper = text->vadj->upper - text->vadj->page_size;
1053                 if (text->vadj->value < upper) {
1054                         old_value = text->vadj->value;
1055                         last_value = text->vadj->value +
1056                                 text->vadj->step_increment * 4;
1057                         last_value = MIN(last_value, upper);
1058
1059                         textview_smooth_scroll_do(textview, old_value,
1060                                                   last_value,
1061                                                   prefs_common.scroll_step);
1062                 }
1063         } else {
1064                 if (text->vadj->value > 0.0) {
1065                         old_value = text->vadj->value;
1066                         last_value = text->vadj->value -
1067                                 text->vadj->step_increment * 4;
1068                         last_value = MAX(last_value, 0.0);
1069
1070                         textview_smooth_scroll_do(textview, old_value,
1071                                                   last_value,
1072                                                   prefs_common.scroll_step);
1073                 }
1074         }
1075 }
1076
1077 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1078 {
1079         GtkText *text = GTK_TEXT(textview->text);
1080         gfloat upper;
1081         gfloat page_incr;
1082         gfloat old_value;
1083         gfloat last_value;
1084
1085         if (prefs_common.scroll_halfpage)
1086                 page_incr = text->vadj->page_increment / 2;
1087         else
1088                 page_incr = text->vadj->page_increment;
1089
1090         if (!up) {
1091                 upper = text->vadj->upper - text->vadj->page_size;
1092                 if (text->vadj->value < upper) {
1093                         old_value = text->vadj->value;
1094                         last_value = text->vadj->value + page_incr;
1095                         last_value = MIN(last_value, upper);
1096
1097                         textview_smooth_scroll_do(textview, old_value,
1098                                                   last_value,
1099                                                   prefs_common.scroll_step);
1100                 } else
1101                         return FALSE;
1102         } else {
1103                 if (text->vadj->value > 0.0) {
1104                         old_value = text->vadj->value;
1105                         last_value = text->vadj->value - page_incr;
1106                         last_value = MAX(last_value, 0.0);
1107
1108                         textview_smooth_scroll_do(textview, old_value,
1109                                                   last_value,
1110                                                   prefs_common.scroll_step);
1111                 } else
1112                         return FALSE;
1113         }
1114
1115         return TRUE;
1116 }
1117
1118 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1119                                  TextView *textview)
1120 {
1121         SummaryView *summaryview = NULL;
1122
1123         if (!event) return;
1124         if (textview->messageview->mainwin)
1125                 summaryview = textview->messageview->mainwin->summaryview;
1126
1127         switch (event->keyval) {
1128         case GDK_Tab:
1129         case GDK_Home:
1130         case GDK_Left:
1131         case GDK_Up:
1132         case GDK_Right:
1133         case GDK_Down:
1134         case GDK_Page_Up:
1135         case GDK_Page_Down:
1136         case GDK_End:
1137         case GDK_Control_L:
1138         case GDK_Control_R:
1139                 break;
1140         case GDK_space:
1141                 if (summaryview)
1142                         summary_pass_key_press_event(summaryview, event);
1143                 else
1144                         textview_scroll_page(textview, FALSE);
1145                 break;
1146         case GDK_BackSpace:
1147         case GDK_Delete:
1148                 textview_scroll_page(textview, TRUE);
1149                 break;
1150         case GDK_Return:
1151                 textview_scroll_one_line(textview,
1152                                          (event->state & GDK_MOD1_MASK) != 0);
1153                 break;
1154         default:
1155                 if (summaryview)
1156                         summary_pass_key_press_event(summaryview, event);
1157                 break;
1158         }
1159 }
1160
1161 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1162                                     TextView *textview)
1163 {
1164         if (event &&
1165             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS) ||
1166              event->button == 2)) {
1167                 GSList *cur;
1168                 guint current_pos;
1169
1170                 current_pos = GTK_EDITABLE(textview->text)->current_pos;
1171
1172                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1173                         RemoteURI *uri = (RemoteURI *)cur->data;
1174
1175                         if (current_pos >= uri->start &&
1176                             current_pos <  uri->end) {
1177                                 if (!strncasecmp(uri->uri, "mailto:", 7))
1178                                         compose_new_with_recipient
1179                                                 (NULL, uri->uri + 7);
1180                                 else
1181                                         open_uri(uri->uri,
1182                                                  prefs_common.uri_cmd);
1183                         }
1184                 }
1185         }
1186 }
1187
1188 static void textview_uri_list_remove_all(GSList *uri_list)
1189 {
1190         GSList *cur;
1191
1192         for (cur = uri_list; cur != NULL; cur = cur->next) {
1193                 if (cur->data) {
1194                         g_free(((RemoteURI *)cur->data)->uri);
1195                         g_free(cur->data);
1196                 }
1197         }
1198
1199         g_slist_free(uri_list);
1200 }