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 #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_widget_show(text_sb);
 155         gtk_widget_show(text_mb);
 156         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 157         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 158         gtk_widget_ensure_style(text_sb);
 159         gtk_widget_ensure_style(text_mb);
 160         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 161                 GtkStyle *style;
 162
 163                 style = gtk_style_copy(text_sb->style);
 164                 gdk_font_unref(style->font);
 165                 FONT_LOAD(style->font, NORMAL_FONT);
 166                 gtk_widget_set_style(text_sb, style);
 167         }
 168         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 169                 GtkStyle *style;
 170
 171                 style = gtk_style_copy(text_mb->style);
 172                 gdk_font_unref(style->font);
 173                 style->font = gdk_fontset_load(NORMAL_FONT);
 174                 gtk_widget_set_style(text_mb, style);
 175         }
 176         gtk_widget_ref(scrolledwin_sb);
 177         gtk_widget_ref(scrolledwin_mb);
 178
 179         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 180         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 181         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 182                            GTK_SIGNAL_FUNC(textview_key_pressed),
 183                            textview);
 184         gtk_signal_connect(GTK_OBJECT(text_sb), "button_press_event",
 185                            GTK_SIGNAL_FUNC(textview_button_pressed),
 186                            textview);
 187         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 188                            GTK_SIGNAL_FUNC(textview_key_pressed),
 189                            textview);
 190         gtk_signal_connect(GTK_OBJECT(text_mb), "button_press_event",
 191                            GTK_SIGNAL_FUNC(textview_button_pressed),
 192                            textview);
 193
 194         gtk_widget_show(scrolledwin_sb);
 195         gtk_widget_show(scrolledwin_mb);
 196
 197         vbox = gtk_vbox_new(FALSE, 0);
 198         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 199
 200         textview->vbox           = vbox;
 201         textview->scrolledwin    = scrolledwin_sb;
 202         textview->scrolledwin_sb = scrolledwin_sb;
 203         textview->scrolledwin_mb = scrolledwin_mb;
 204         textview->text           = text_sb;
 205         textview->text_sb        = text_sb;
 206         textview->text_mb        = text_mb;
 207         textview->text_is_mb     = FALSE;
 208         textview->uri_list       = NULL;
 209
 210         return textview;
 211 }
 212
 213 void textview_init(TextView *textview)
 214 {
 215         gtkut_widget_disable_theme_engine(textview->text_sb);
 216         gtkut_widget_disable_theme_engine(textview->text_mb);
 217         textview_update_message_colors();
 218         textview_set_font(textview, NULL);
 219 }
 220
 221 void textview_update_message_colors(void)
 222 {
 223         GdkColor black = {0, 0, 0, 0};
 224
 225         if (prefs_common.enable_color) {
 226                 /* grab the quote colors, converting from an int to a GdkColor */
 227                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 228                                                &quote_colors[0]);
 229                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 230                                                &quote_colors[1]);
 231                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 232                                                &quote_colors[2]);
 233                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 234                                                &uri_color);
 235         } else {
 236                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 237                         uri_color = emphasis_color = black;
 238         }
 239 }
 240
 241 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 242                            const gchar *file)
 243 {
 244         FILE *fp;
 245
 246         if ((fp = fopen(file, "r")) == NULL) {
 247                 FILE_OP_ERROR(file, "fopen");
 248                 return;
 249         }
 250
 251         textview_show_part(textview, mimeinfo, fp);
 252
 253         fclose(fp);
 254 }
 255
 256 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 257 {
 258         GtkText *text;
 259         gchar buf[BUFFSIZE];
 260         const gchar *boundary = NULL;
 261         gint boundary_len = 0;
 262         const gchar *charset = NULL;
 263         FILE *tmpfp;
 264         GPtrArray *headers = NULL;
 265         CodeConverter *conv;
 266
 267         g_return_if_fail(mimeinfo != NULL);
 268         g_return_if_fail(fp != NULL);
 269
 270         if (mimeinfo->mime_type == MIME_MULTIPART) {
 271                 if (mimeinfo->sub) {
 272                         mimeinfo = mimeinfo->sub;
 273                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 274                                 perror("fseek");
 275                                 return;
 276                         }
 277                 } else
 278                         return;
 279         }
 280         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 281                 boundary = mimeinfo->parent->boundary;
 282                 boundary_len = strlen(boundary);
 283         }
 284
 285         if (!boundary && mimeinfo->mime_type == MIME_TEXT) {
 286                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 287                         perror("fseek");
 288                 headers = textview_scan_header(textview, fp);
 289         } else {
 290                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 291                         glong fpos;
 292
 293                         if ((fpos = ftell(fp)) < 0)
 294                                 perror("ftell");
 295                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
 296                                  < 0)
 297                                 perror("fseek");
 298                         else {
 299                                 headers = textview_scan_header(textview, fp);
 300                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 301                                         perror("fseek");
 302                         }
 303                 }
 304                 while (fgets(buf, sizeof(buf), fp) != NULL)
 305                         if (buf[0] == '\r' || buf[0] == '\n') break;
 306         }
 307
 308         /* display attached RFC822 single text message */
 309         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 310                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 311                 headers = textview_scan_header(textview, fp);
 312                 mimeinfo = mimeinfo->sub;
 313         } else if (!mimeinfo->parent &&
 314                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 315                 if (!mimeinfo->sub) return;
 316                 headers = textview_scan_header(textview, fp);
 317                 mimeinfo = mimeinfo->sub;
 318         }
 319
 320         if (prefs_common.force_charset)
 321                 charset = prefs_common.force_charset;
 322         else if (mimeinfo->charset)
 323                 charset = mimeinfo->charset;
 324         textview_set_font(textview, charset);
 325
 326         conv = conv_code_converter_new(charset);
 327
 328         textview_clear(textview);
 329         text = GTK_TEXT(textview->text);
 330         gtk_text_freeze(text);
 331
 332         if (headers) {
 333                 textview_show_header(textview, headers);
 334                 procheader_header_array_destroy(headers);
 335         }
 336
 337         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 338         if (tmpfp) {
 339                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 340                         textview_show_html(textview, tmpfp, conv);
 341                 else
 342                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 343                                 textview_write_line(textview, buf, conv);
 344                 fclose(tmpfp);
 345         }
 346
 347         conv_code_converter_destroy(conv);
 348
 349         gtk_text_thaw(text);
 350 }
 351
 352 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 353 {
 354         GtkText *text;
 355
 356         if (!partinfo) return;
 357
 358         textview_set_font(textview, NULL);
 359         text = GTK_TEXT(textview->text);
 360         textview_clear(textview);
 361
 362         gtk_text_freeze(text);
 363
 364         gtk_text_insert
 365                 (text, textview->msgfont, NULL, NULL,
 366                  _("To save this part, pop up the context menu with\n"), -1);
 367         gtk_text_insert
 368                 (text, textview->msgfont, NULL, NULL,
 369                  _("right click and select `Save as...', or press `y' key.\n\n"), -1);
 370
 371         gtk_text_insert
 372                 (text, textview->msgfont, NULL, NULL,
 373                  _("To display this part as a text message, select\n"), -1);
 374         gtk_text_insert
 375                 (text, textview->msgfont, NULL, NULL,
 376                  _("`Display as text', or press `t' key.\n\n"), -1);
 377
 378         gtk_text_insert
 379                 (text, textview->msgfont, NULL, NULL,
 380                  _("To open this part with external program, select `Open',\n"), -1);
 381         gtk_text_insert
 382                 (text, textview->msgfont, NULL, NULL,
 383                  _("or double-click, or click the center button, or press `l' key."), -1);
 384
 385         gtk_text_thaw(text);
 386 }
 387
 388 #if USE_GPGME
 389 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 390 {
 391         GtkText *text;
 392
 393         if (!partinfo) return;
 394
 395         textview_set_font(textview, NULL);
 396         text = GTK_TEXT(textview->text);
 397         textview_clear(textview);
 398
 399         gtk_text_freeze(text);
 400
 401         if (partinfo->sigstatus_full == NULL) {
 402                 gtk_text_insert
 403                         (text, textview->msgfont, NULL, NULL,
 404                          _("This signature has not been checked yet.\n"), -1);
 405                 gtk_text_insert
 406                         (text, textview->msgfont, NULL, NULL,
 407                          _("To check it, pop up the context menu with\n"), -1);
 408                 gtk_text_insert
 409                         (text, textview->msgfont, NULL, NULL,
 410                          _("right click and select `Check signature'.\n"), -1);
 411         } else {
 412                 gtk_text_insert(text, textview->msgfont, NULL, NULL,
 413                                 partinfo->sigstatus_full, -1);
 414         }
 415
 416         gtk_text_thaw(text);
 417 }
 418 #endif /* USE_GPGME */
 419
 420 static void textview_show_html(TextView *textview, FILE *fp,
 421                                CodeConverter *conv)
 422 {
 423         HTMLParser *parser;
 424         gchar *str;
 425
 426         parser = html_parser_new(fp, conv);
 427         g_return_if_fail(parser != NULL);
 428
 429         while ((str = html_parse(parser)) != NULL) {
 430                 textview_write_line(textview, str, NULL);
 431         }
 432         html_parser_destroy(parser);
 433 }
 434
 435 /* get_uri_part() - retrieves a URI starting from scanpos.
 436                     Returns TRUE if succesful */
 437 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 438                              const gchar **bp, const gchar **ep)
 439 {
 440         const gchar *ep_;
 441
 442         g_return_val_if_fail(start != NULL, FALSE);
 443         g_return_val_if_fail(scanpos != NULL, FALSE);
 444         g_return_val_if_fail(bp != NULL, FALSE);
 445         g_return_val_if_fail(ep != NULL, FALSE);
 446
 447         *bp = scanpos;
 448
 449         /* find end point of URI */
 450         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 451                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 452                         break;
 453         }
 454
 455         /* no punctuation at end of string */
 456
 457         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 458          * should pass some URI type to this function and decide on that whether
 459          * to perform punctuation stripping */
 460
 461 #define IS_REAL_PUNCT(ch) \
 462         (ispunct(ch) && ((ch) != '/'))
 463
 464         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 465                 ;
 466
 467 #undef IS_REAL_PUNCT
 468
 469         *ep = ep_;
 470
 471         return TRUE;
 472 }
 473
 474 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 475 {
 476         return g_strndup(bp, ep - bp);
 477 }
 478
 479 /* valid mail address characters */
 480 #define IS_RFC822_CHAR(ch) \
 481         (isascii(ch) && \
 482          (ch) > 32   && \
 483          (ch) != 127 && \
 484          !isspace(ch) && \
 485          !strchr("()<>\"", (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_;
 495         const gchar *ep_;
 496
 497         g_return_val_if_fail(start != NULL, FALSE);
 498         g_return_val_if_fail(scanpos != NULL, FALSE);
 499         g_return_val_if_fail(bp != NULL, FALSE);
 500         g_return_val_if_fail(ep != NULL, FALSE);
 501
 502         /* scan start of address */
 503         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 504                 ;
 505
 506         /* TODO: should start with an alnum? */
 507         bp_++;
 508         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
 509                 ;
 510
 511         if (bp_ != scanpos) {
 512                 /* scan end of address */
 513                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 514                         ;
 515
 516                 /* TODO: really should terminate with an alnum? */
 517                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
 518                         ;
 519                 ep_++;
 520
 521                 if (ep_ > scanpos + 1) {
 522                         *ep = ep_;
 523                         *bp = bp_;
 524                         result = TRUE;
 525                 }
 526         }
 527
 528         /* we now have at least the address. now see if this is <bracketed>; in this
 529          * case we also scan for the informative part. we could make this a useful
 530          * function because it tries to parse out an email address backwards. :) */
 531         if (result) {
 532                 if ( ((bp_ - 1 > start) && *(bp_ - 1) == '<') &&  (*ep_ == '>')) {
 533
 534                         /* the informative part of the email address (describing the name
 535                          * of the email address owner) may contain quoted parts. the
 536                          * closure stack stores the last encountered quotes. */
 537                         char    closure_stack[128];
 538                         char   *ptr = closure_stack;
 539 #define FULL_STACK()    ((ptr - closure_stack) >= sizeof closure_stack)
 540 #define IN_STACK()              (ptr > closure_stack)
 541 /* has underrun check */
 542 #define POP_STACK()             if(IN_STACK()) --ptr
 543 /* has overrun check */
 544 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 545 /* has underrun check */
 546 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 547
 548                         ep_++;
 549
 550                         /* scan for the informative part. */
 551
 552                         for (bp_ -= 2; bp_ >= start; bp_--) {
 553                                 /* if closure on the stack keep scanning */
 554                                 if (PEEK_STACK() == *bp_) {
 555                                         POP_STACK();
 556                                 }
 557                                 else {
 558                                         if (*bp_ == '\'' || *bp_ == '"')  {
 559                                                 PUSH_STACK(*bp_);
 560                                         }
 561                                         else {
 562                                                 /* if nothing in the closure stack, do the special conditions
 563                                                  * the following if..else expression simply checks whether
 564                                                  * a token is acceptable. if not acceptable, the clause
 565                                                  * should terminate the loop with a 'break' */
 566                                                 if (!PEEK_STACK()) {
 567                                                         if ( *bp_ == '-'
 568                                                         &&   (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 569                                                         &&   (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1))) ) {
 570                                                                 /* hyphens are allowed, but only in between alnums */
 571                                                         }
 572                                                         else if ( !ispunct(*bp_) ) {
 573                                                                 /* but anything not being a punctiation is ok */
 574                                                         }
 575                                                         else {
 576                                                                 break; /* anything else is rejected */
 577                                                         }
 578                                                 }
 579                                         }
 580                                 }
 581                         }
 582
 583                         bp_++;
 584
 585 #undef PEEK_STACK
 586 #undef PUSH_STACK
 587 #undef POP_STACK
 588 #undef IN_STACK
 589 #undef FULL_STACK
 590
 591                         /* scan forward (should start with an alnum) */
 592                         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 593                                 ;
 594
 595                         *ep = ep_;
 596                         *bp = bp_;
 597                 }
 598         }
 599         return result;
 600 }
 601
 602 #undef IS_RFC822_CHAR
 603
 604 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 605 {
 606         /* returns a mailto: URI; mailto: is also used to detect the
 607          * uri type later on in the button_pressed signal handler */
 608         gchar *tmp;
 609         gchar *result;
 610
 611         tmp = g_strndup(bp, ep - bp);
 612         result = g_strconcat("mailto:", tmp, NULL);
 613         g_free(tmp);
 614
 615         return result;
 616 }
 617
 618 #define ADD_TXT_POS(bp_, ep_, pti_) \
 619         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 620                 last = last->next; \
 621                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 622                 last->next = NULL; \
 623         } else { \
 624                 g_warning("alloc error scanning URIs\n"); \
 625                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 626                                 linebuf, -1); \
 627                 return; \
 628         }
 629
 630 /* textview_make_clickable_parts() - colorizes clickable parts */
 631 static void textview_make_clickable_parts(TextView *textview,
 632                                           GdkFont  *font,
 633                                           GdkColor *fg_color,
 634                                           GdkColor *uri_color,
 635                                           const gchar *linebuf)
 636 {
 637         /* parse table - in order of priority */
 638         struct table {
 639                 const gchar *needle; /* token */
 640
 641                 /* token search function */
 642                 gchar    *(*search)     (const gchar *haystack,
 643                                          const gchar *needle);
 644                 /* part parsing function */
 645                 gboolean  (*parse)      (const gchar *start,
 646                                          const gchar *scanpos,
 647                                          const gchar **bp_,
 648                                          const gchar **ep_);
 649                 /* part to URI function */
 650                 gchar    *(*build_uri)  (const gchar *bp,
 651                                          const gchar *ep);
 652         };
 653
 654         static struct table parser[] = {
 655                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 656                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 657                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 658                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 659                 {"@",        strcasestr, get_email_part, make_email_string}
 660         };
 661         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 662
 663         gint  n;
 664         const gchar *walk, *bp, *ep;
 665
 666         struct txtpos {
 667                 const gchar     *bp, *ep;       /* text position */
 668                 gint             pti;           /* index in parse table */
 669                 struct txtpos   *next;          /* next */
 670         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 671
 672         GtkText *text = GTK_TEXT(textview->text);
 673
 674         /* parse for clickable parts, and build a list of begin and end positions  */
 675         for (walk = linebuf, n = 0;;) {
 676                 gint last_index = PARSE_ELEMS;
 677                 gchar *scanpos = NULL;
 678
 679                 /* FIXME: this looks phony. scanning for anything in the parse table */
 680                 for (n = 0; n < PARSE_ELEMS; n++) {
 681                         gchar *tmp;
 682
 683                         tmp = parser[n].search(walk, parser[n].needle);
 684                         if (tmp) {
 685                                 if (scanpos == NULL || tmp < scanpos) {
 686                                         scanpos = tmp;
 687                                         last_index = n;
 688                                 }
 689                         }
 690                 }
 691
 692                 if (scanpos) {
 693                         /* check if URI can be parsed */
 694                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 695                             && (ep - bp - 1) > strlen(parser[last_index].needle)) {
 696                                         ADD_TXT_POS(bp, ep, last_index);
 697                                         walk = ep;
 698                         } else
 699                                 walk = scanpos +
 700                                         strlen(parser[last_index].needle);
 701                 } else
 702                         break;
 703         }
 704
 705         /* colorize this line */
 706         if (head.next) {
 707                 const gchar *normal_text = linebuf;
 708
 709                 /* insert URIs */
 710                 for (last = head.next; last != NULL;
 711                      normal_text = last->ep, last = last->next) {
 712                         RemoteURI *uri;
 713
 714                         uri = g_new(RemoteURI, 1);
 715                         if (last->bp - normal_text > 0)
 716                                 gtk_text_insert(text, font,
 717                                                 fg_color, NULL,
 718                                                 normal_text,
 719                                                 last->bp - normal_text);
 720                         uri->uri = parser[last->pti].build_uri(last->bp,
 721                                                 last->ep);
 722                         uri->start = gtk_text_get_point(text);
 723                         gtk_text_insert(text, font, uri_color,
 724                                         NULL, last->bp, last->ep - last->bp);
 725                         uri->end = gtk_text_get_point(text);
 726                         textview->uri_list =
 727                                 g_slist_append(textview->uri_list, uri);
 728                 }
 729
 730                 if (*normal_text)
 731                         gtk_text_insert(text, font, fg_color,
 732                                         NULL, normal_text, -1);
 733         } else
 734                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 735 }
 736
 737 #undef ADD_TXT_POS
 738
 739 static void textview_write_line(TextView *textview, const gchar *str,
 740                                 CodeConverter *conv)
 741 {
 742         GtkText *text = GTK_TEXT(textview->text);
 743         gchar buf[BUFFSIZE];
 744         size_t len;
 745         GdkColor *fg_color;
 746         gint quotelevel = -1;
 747
 748         if (!conv)
 749                 strncpy2(buf, str, sizeof(buf));
 750         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 751                 gtk_text_insert(text, textview->msgfont,
 752                                 prefs_common.enable_color
 753                                 ? &error_color : NULL, NULL,
 754                                 "*** Warning: code conversion failed ***\n",
 755                                 -1);
 756                 return;
 757         }
 758
 759         len = strlen(buf);
 760         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 761                 buf[len - 2] = '\n';
 762                 buf[len - 1] = '\0';
 763         }
 764         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 765         fg_color = NULL;
 766
 767         /* change color of quotation
 768            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 769            Up to 3 levels of quotations are detected, and each
 770            level is colored using a different color. */
 771         if (prefs_common.enable_color && strchr(buf, '>')) {
 772                 quotelevel = get_quote_level(buf);
 773
 774                 /* set up the correct foreground color */
 775                 if (quotelevel > 2) {
 776                         /* recycle colors */
 777                         if (prefs_common.recycle_quote_colors)
 778                                 quotelevel %= 3;
 779                         else
 780                                 quotelevel = 2;
 781                 }
 782         }
 783
 784         if (quotelevel == -1)
 785                 fg_color = NULL;
 786         else
 787                 fg_color = &quote_colors[quotelevel];
 788
 789         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 790                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 791
 792         if (prefs_common.enable_color)
 793                 textview_make_clickable_parts(textview, textview->msgfont,
 794                                               fg_color, &uri_color, buf);
 795         else
 796                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
 797                                 buf, -1);
 798 }
 799
 800 void textview_clear(TextView *textview)
 801 {
 802         GtkText *text = GTK_TEXT(textview->text);
 803
 804         gtk_text_freeze(text);
 805         gtk_text_backward_delete(text, gtk_text_get_length(text));
 806         gtk_text_thaw(text);
 807
 808         textview_uri_list_remove_all(textview->uri_list);
 809         textview->uri_list = NULL;
 810 }
 811
 812 void textview_destroy(TextView *textview)
 813 {
 814         textview_uri_list_remove_all(textview->uri_list);
 815         textview->uri_list = NULL;
 816
 817         if (!textview->scrolledwin_sb->parent)
 818                 gtk_widget_destroy(textview->scrolledwin_sb);
 819         if (!textview->scrolledwin_mb->parent)
 820                 gtk_widget_destroy(textview->scrolledwin_mb);
 821
 822         if (textview->msgfont) {
 823                 textview->msgfont->ascent = textview->prev_ascent;
 824                 textview->msgfont->descent = textview->prev_descent;
 825                 gdk_font_unref(textview->msgfont);
 826         }
 827         if (textview->boldfont)
 828                 gdk_font_unref(textview->boldfont);
 829
 830         g_free(textview);
 831 }
 832
 833 void textview_set_font(TextView *textview, const gchar *codeset)
 834 {
 835         gboolean use_fontset = TRUE;
 836
 837         /* In multi-byte mode, GtkText can't display 8bit characters
 838            correctly, so it must be single-byte mode. */
 839         if (MB_CUR_MAX > 1) {
 840                 if (codeset) {
 841                         if (!strncasecmp(codeset, "ISO-8859-", 9) ||
 842                             !strncasecmp(codeset, "KOI8-", 5)     ||
 843                             !strncasecmp(codeset, "CP", 2)        ||
 844                             !strncasecmp(codeset, "WINDOWS-", 8)  ||
 845                             !strcasecmp(codeset, "BALTIC"))
 846                                 use_fontset = FALSE;
 847                 }
 848         } else
 849                 use_fontset = FALSE;
 850
 851         if (textview->text_is_mb && !use_fontset) {
 852                 GtkWidget *parent;
 853
 854                 parent = textview->scrolledwin_mb->parent;
 855                 gtk_editable_select_region
 856                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 857                 gtk_container_remove(GTK_CONTAINER(parent),
 858                                      textview->scrolledwin_mb);
 859                 gtk_container_add(GTK_CONTAINER(parent),
 860                                   textview->scrolledwin_sb);
 861
 862                 textview->text = textview->text_sb;
 863                 textview->text_is_mb = FALSE;
 864         } else if (!textview->text_is_mb && use_fontset) {
 865                 GtkWidget *parent;
 866
 867                 parent = textview->scrolledwin_sb->parent;
 868                 gtk_editable_select_region
 869                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 870                 gtk_container_remove(GTK_CONTAINER(parent),
 871                                      textview->scrolledwin_sb);
 872                 gtk_container_add(GTK_CONTAINER(parent),
 873                                   textview->scrolledwin_mb);
 874
 875                 textview->text = textview->text_mb;
 876                 textview->text_is_mb = TRUE;
 877         }
 878
 879         if (prefs_common.textfont) {
 880                 if (textview->msgfont) {
 881                         textview->msgfont->ascent = textview->prev_ascent;
 882                         textview->msgfont->descent = textview->prev_descent;
 883                         gdk_font_unref(textview->msgfont);
 884                         textview->msgfont = NULL;
 885                 }
 886                 if (use_fontset)
 887                         textview->msgfont =
 888                                 gdk_fontset_load(prefs_common.textfont);
 889                 else {
 890                         if (MB_CUR_MAX > 1) {
 891                                 FONT_LOAD(textview->msgfont,
 892                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 893                         } else {
 894                                 FONT_LOAD(textview->msgfont,
 895                                           prefs_common.textfont);
 896                         }
 897                 }
 898
 899                 if (textview->msgfont) {
 900                         gint ascent, descent;
 901
 902                         textview->prev_ascent = textview->msgfont->ascent;
 903                         textview->prev_descent = textview->msgfont->descent;
 904                         descent = prefs_common.line_space / 2;
 905                         ascent  = prefs_common.line_space - descent;
 906                         textview->msgfont->ascent  += ascent;
 907                         textview->msgfont->descent += descent;
 908                 }
 909         }
 910
 911         if (!textview->boldfont)
 912                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 913         if (!spacingfont)
 914                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 915 }
 916
 917 enum
 918 {
 919         H_DATE          = 0,
 920         H_FROM          = 1,
 921         H_TO            = 2,
 922         H_NEWSGROUPS    = 3,
 923         H_SUBJECT       = 4,
 924         H_CC            = 5,
 925         H_REPLY_TO      = 6,
 926         H_FOLLOWUP_TO   = 7,
 927         H_X_MAILER      = 8,
 928         H_X_NEWSREADER  = 9,
 929         H_USER_AGENT    = 10,
 930         H_ORGANIZATION  = 11,
 931 };
 932
 933 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
 934 {
 935         gchar buf[BUFFSIZE];
 936         GPtrArray *headers, *sorted_headers;
 937         GSList *disphdr_list;
 938         Header *header;
 939         gint i;
 940
 941         g_return_val_if_fail(fp != NULL, NULL);
 942
 943         if (!prefs_common.display_header) {
 944                 while (fgets(buf, sizeof(buf), fp) != NULL)
 945                         if (buf[0] == '\r' || buf[0] == '\n') break;
 946                 return NULL;
 947         }
 948
 949         headers = procheader_get_header_array_asis(fp);
 950
 951         sorted_headers = g_ptr_array_new();
 952
 953         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
 954              disphdr_list = disphdr_list->next) {
 955                 DisplayHeaderProp *dp =
 956                         (DisplayHeaderProp *)disphdr_list->data;
 957
 958                 for (i = 0; i < headers->len; i++) {
 959                         header = g_ptr_array_index(headers, i);
 960
 961                         if (!strcasecmp(header->name, dp->name)) {
 962                                 if (dp->hidden)
 963                                         procheader_header_free(header);
 964                                 else
 965                                         g_ptr_array_add(sorted_headers, header);
 966
 967                                 g_ptr_array_remove_index(headers, i);
 968                                 i--;
 969                         }
 970                 }
 971         }
 972
 973         if (prefs_common.show_other_header) {
 974                 for (i = 0; i < headers->len; i++) {
 975                         header = g_ptr_array_index(headers, i);
 976                         g_ptr_array_add(sorted_headers, header);
 977                 }
 978         }
 979
 980         g_ptr_array_free(headers, TRUE);
 981         return sorted_headers;
 982 }
 983
 984 static void textview_show_header(TextView *textview, GPtrArray *headers)
 985 {
 986         GtkText *text = GTK_TEXT(textview->text);
 987         Header *header;
 988         gint i;
 989
 990         g_return_if_fail(headers != NULL);
 991
 992         gtk_text_freeze(text);
 993
 994         for (i = 0; i < headers->len; i++) {
 995                 header = g_ptr_array_index(headers, i);
 996                 g_return_if_fail(header->name != NULL);
 997
 998                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
 999                                 header->name, -1);
1000                 gtk_text_insert(text, textview->boldfont, NULL, NULL, ":", 2);
1001
1002                 if (!strcasecmp(header->name, "Subject") ||
1003                     !strcasecmp(header->name, "From")    ||
1004                     !strcasecmp(header->name, "To")      ||
1005                     !strcasecmp(header->name, "Cc"))
1006                         unfold_line(header->body);
1007
1008                 if (prefs_common.enable_color &&
1009                     (!strncmp(header->name, "X-Mailer", 8) ||
1010                      !strncmp(header->name, "X-Newsreader", 12)) &&
1011                     strstr(header->body, "Sylpheed") != NULL)
1012                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1013                                         header->body, -1);
1014                 else if (prefs_common.enable_color) {
1015                         textview_make_clickable_parts(textview,
1016                                                       NULL, NULL, &uri_color,
1017                                                       header->body);
1018                 } else {
1019                         gtk_text_insert(text, NULL, NULL, NULL,
1020                                         header->body, -1);
1021                 }
1022                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1023         }
1024
1025         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1026         gtk_text_thaw(text);
1027 }
1028
1029 void textview_scroll_one_line(TextView *textview, gboolean up)
1030 {
1031         GtkText *text = GTK_TEXT(textview->text);
1032         gfloat upper;
1033
1034         if (prefs_common.enable_smooth_scroll) {
1035                 textview_smooth_scroll_one_line(textview, up);
1036                 return;
1037         }
1038
1039         if (!up) {
1040                 upper = text->vadj->upper - text->vadj->page_size;
1041                 if (text->vadj->value < upper) {
1042                         text->vadj->value +=
1043                                 text->vadj->step_increment * 4;
1044                         text->vadj->value =
1045                                 MIN(text->vadj->value, upper);
1046                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1047                                                 "value_changed");
1048                 }
1049         } else {
1050                 if (text->vadj->value > 0.0) {
1051                         text->vadj->value -=
1052                                 text->vadj->step_increment * 4;
1053                         text->vadj->value =
1054                                 MAX(text->vadj->value, 0.0);
1055                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1056                                                 "value_changed");
1057                 }
1058         }
1059 }
1060
1061 gboolean textview_scroll_page(TextView *textview, gboolean up)
1062 {
1063         GtkText *text = GTK_TEXT(textview->text);
1064         gfloat upper;
1065         gfloat page_incr;
1066
1067         if (prefs_common.enable_smooth_scroll)
1068                 return textview_smooth_scroll_page(textview, up);
1069
1070         if (prefs_common.scroll_halfpage)
1071                 page_incr = text->vadj->page_increment / 2;
1072         else
1073                 page_incr = text->vadj->page_increment;
1074
1075         if (!up) {
1076                 upper = text->vadj->upper - text->vadj->page_size;
1077                 if (text->vadj->value < upper) {
1078                         text->vadj->value += page_incr;
1079                         text->vadj->value = MIN(text->vadj->value, upper);
1080                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1081                                                 "value_changed");
1082                 } else
1083                         return FALSE;
1084         } else {
1085                 if (text->vadj->value > 0.0) {
1086                         text->vadj->value -= page_incr;
1087                         text->vadj->value = MAX(text->vadj->value, 0.0);
1088                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1089                                                 "value_changed");
1090                 } else
1091                         return FALSE;
1092         }
1093
1094         return TRUE;
1095 }
1096
1097 static void textview_smooth_scroll_do(TextView *textview,
1098                                       gfloat old_value, gfloat last_value,
1099                                       gint step)
1100 {
1101         GtkText *text = GTK_TEXT(textview->text);
1102         gint change_value;
1103         gboolean up;
1104         gint i;
1105
1106         if (old_value < last_value) {
1107                 change_value = last_value - old_value;
1108                 up = FALSE;
1109         } else {
1110                 change_value = old_value - last_value;
1111                 up = TRUE;
1112         }
1113
1114         gdk_key_repeat_disable();
1115
1116         for (i = step; i <= change_value; i += step) {
1117                 text->vadj->value = old_value + (up ? -i : i);
1118                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1119                                         "value_changed");
1120         }
1121
1122         text->vadj->value = last_value;
1123         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1124
1125         gdk_key_repeat_restore();
1126 }
1127
1128 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1129 {
1130         GtkText *text = GTK_TEXT(textview->text);
1131         gfloat upper;
1132         gfloat old_value;
1133         gfloat last_value;
1134
1135         if (!up) {
1136                 upper = text->vadj->upper - text->vadj->page_size;
1137                 if (text->vadj->value < upper) {
1138                         old_value = text->vadj->value;
1139                         last_value = text->vadj->value +
1140                                 text->vadj->step_increment * 4;
1141                         last_value = MIN(last_value, upper);
1142
1143                         textview_smooth_scroll_do(textview, old_value,
1144                                                   last_value,
1145                                                   prefs_common.scroll_step);
1146                 }
1147         } else {
1148                 if (text->vadj->value > 0.0) {
1149                         old_value = text->vadj->value;
1150                         last_value = text->vadj->value -
1151                                 text->vadj->step_increment * 4;
1152                         last_value = MAX(last_value, 0.0);
1153
1154                         textview_smooth_scroll_do(textview, old_value,
1155                                                   last_value,
1156                                                   prefs_common.scroll_step);
1157                 }
1158         }
1159 }
1160
1161 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1162 {
1163         GtkText *text = GTK_TEXT(textview->text);
1164         gfloat upper;
1165         gfloat page_incr;
1166         gfloat old_value;
1167         gfloat last_value;
1168
1169         if (prefs_common.scroll_halfpage)
1170                 page_incr = text->vadj->page_increment / 2;
1171         else
1172                 page_incr = text->vadj->page_increment;
1173
1174         if (!up) {
1175                 upper = text->vadj->upper - text->vadj->page_size;
1176                 if (text->vadj->value < upper) {
1177                         old_value = text->vadj->value;
1178                         last_value = text->vadj->value + page_incr;
1179                         last_value = MIN(last_value, upper);
1180
1181                         textview_smooth_scroll_do(textview, old_value,
1182                                                   last_value,
1183                                                   prefs_common.scroll_step);
1184                 } else
1185                         return FALSE;
1186         } else {
1187                 if (text->vadj->value > 0.0) {
1188                         old_value = text->vadj->value;
1189                         last_value = text->vadj->value - page_incr;
1190                         last_value = MAX(last_value, 0.0);
1191
1192                         textview_smooth_scroll_do(textview, old_value,
1193                                                   last_value,
1194                                                   prefs_common.scroll_step);
1195                 } else
1196                         return FALSE;
1197         }
1198
1199         return TRUE;
1200 }
1201
1202 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1203                                  TextView *textview)
1204 {
1205         SummaryView *summaryview = NULL;
1206
1207         if (!event) return;
1208         if (textview->messageview->mainwin)
1209                 summaryview = textview->messageview->mainwin->summaryview;
1210
1211         switch (event->keyval) {
1212         case GDK_Tab:
1213         case GDK_Home:
1214         case GDK_Left:
1215         case GDK_Up:
1216         case GDK_Right:
1217         case GDK_Down:
1218         case GDK_Page_Up:
1219         case GDK_Page_Down:
1220         case GDK_End:
1221         case GDK_Control_L:
1222         case GDK_Control_R:
1223                 break;
1224         case GDK_space:
1225                 if (summaryview)
1226                         summary_pass_key_press_event(summaryview, event);
1227                 else
1228                         textview_scroll_page(textview, FALSE);
1229                 break;
1230         case GDK_BackSpace:
1231         case GDK_Delete:
1232                 textview_scroll_page(textview, TRUE);
1233                 break;
1234         case GDK_Return:
1235                 textview_scroll_one_line(textview,
1236                                          (event->state & GDK_MOD1_MASK) != 0);
1237                 break;
1238         default:
1239                 if (summaryview)
1240                         summary_pass_key_press_event(summaryview, event);
1241                 break;
1242         }
1243 }
1244
1245 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1246                                     TextView *textview)
1247 {
1248         if (event &&
1249             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1250                 || event->button == 2
1251                 || event->button == 3)) {
1252                 GSList *cur;
1253                 guint current_pos;
1254
1255                 current_pos = GTK_EDITABLE(textview->text)->current_pos;
1256
1257                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1258                         RemoteURI *uri = (RemoteURI *)cur->data;
1259
1260                         if (current_pos >= uri->start &&
1261                             current_pos <  uri->end) {
1262                                 if (!strncasecmp(uri->uri, "mailto:", 7)) {
1263                                         compose_new_with_recipient
1264                                                 (NULL, uri->uri + 7);
1265                                 }
1266                                 else
1267                                         open_uri(uri->uri,
1268                                                  prefs_common.uri_cmd);
1269                         }
1270                 }
1271         }
1272 }
1273
1274 static void textview_uri_list_remove_all(GSList *uri_list)
1275 {
1276         GSList *cur;
1277
1278         for (cur = uri_list; cur != NULL; cur = cur->next) {
1279                 if (cur->data) {
1280                         g_free(((RemoteURI *)cur->data)->uri);
1281                         g_free(cur->data);
1282                 }
1283         }
1284
1285         g_slist_free(uri_list);
1286 }