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 #define TEXT_INSERT(str) \
 353         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
 354
 355 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 356 {
 357         GtkText *text;
 358
 359         if (!partinfo) return;
 360
 361         textview_set_font(textview, NULL);
 362         text = GTK_TEXT(textview->text);
 363         textview_clear(textview);
 364
 365         gtk_text_freeze(text);
 366
 367         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 368         TEXT_INSERT(_("right click and select `Save as...', "));
 369         TEXT_INSERT(_("or press `y' key.\n\n"));
 370
 371         TEXT_INSERT(_("To display this part as a text message, select "));
 372         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 373
 374         TEXT_INSERT(_("To open this part with external program, select "));
 375         TEXT_INSERT(_("`Open' or `Open with...', "));
 376         TEXT_INSERT(_("or double-click, or click the center button, "));
 377         TEXT_INSERT(_("or press `l' key."));
 378
 379         gtk_text_thaw(text);
 380 }
 381
 382 #if USE_GPGME
 383 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 384 {
 385         GtkText *text;
 386
 387         if (!partinfo) return;
 388
 389         textview_set_font(textview, NULL);
 390         text = GTK_TEXT(textview->text);
 391         textview_clear(textview);
 392
 393         gtk_text_freeze(text);
 394
 395         if (partinfo->sigstatus_full == NULL) {
 396                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 397                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 398                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 399         } else {
 400                 TEXT_INSERT(partinfo->sigstatus_full);
 401         }
 402
 403         gtk_text_thaw(text);
 404 }
 405 #endif /* USE_GPGME */
 406
 407 #undef TEXT_INSERT
 408
 409 static void textview_show_html(TextView *textview, FILE *fp,
 410                                CodeConverter *conv)
 411 {
 412         HTMLParser *parser;
 413         gchar *str;
 414
 415         parser = html_parser_new(fp, conv);
 416         g_return_if_fail(parser != NULL);
 417
 418         while ((str = html_parse(parser)) != NULL) {
 419                 textview_write_line(textview, str, NULL);
 420         }
 421         html_parser_destroy(parser);
 422 }
 423
 424 /* get_uri_part() - retrieves a URI starting from scanpos.
 425                     Returns TRUE if succesful */
 426 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 427                              const gchar **bp, const gchar **ep)
 428 {
 429         const gchar *ep_;
 430
 431         g_return_val_if_fail(start != NULL, FALSE);
 432         g_return_val_if_fail(scanpos != NULL, FALSE);
 433         g_return_val_if_fail(bp != NULL, FALSE);
 434         g_return_val_if_fail(ep != NULL, FALSE);
 435
 436         *bp = scanpos;
 437
 438         /* find end point of URI */
 439         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 440                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 441                         break;
 442         }
 443
 444         /* no punctuation at end of string */
 445
 446         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 447          * should pass some URI type to this function and decide on that whether
 448          * to perform punctuation stripping */
 449
 450 #define IS_REAL_PUNCT(ch) \
 451         (ispunct(ch) && ((ch) != '/'))
 452
 453         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 454                 ;
 455
 456 #undef IS_REAL_PUNCT
 457
 458         *ep = ep_;
 459
 460         return TRUE;
 461 }
 462
 463 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 464 {
 465         return g_strndup(bp, ep - bp);
 466 }
 467
 468 /* valid mail address characters */
 469 #define IS_RFC822_CHAR(ch) \
 470         (isascii(ch) && \
 471          (ch) > 32   && \
 472          (ch) != 127 && \
 473          !isspace(ch) && \
 474          !strchr("()<>\"", (ch)))
 475
 476 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 477 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 478                                const gchar **bp, const gchar **ep)
 479 {
 480         /* more complex than the uri part because we need to scan back and forward starting from
 481          * the scan position. */
 482         gboolean result = FALSE;
 483         const gchar *bp_ = NULL;
 484         const gchar *ep_ = NULL;
 485
 486         /* the informative part of the email address (describing the name
 487          * of the email address owner) may contain quoted parts. the
 488          * closure stack stores the last encountered quotes. */
 489         gchar closure_stack[128];
 490         gchar *ptr = closure_stack;
 491
 492         g_return_val_if_fail(start != NULL, FALSE);
 493         g_return_val_if_fail(scanpos != NULL, FALSE);
 494         g_return_val_if_fail(bp != NULL, FALSE);
 495         g_return_val_if_fail(ep != NULL, FALSE);
 496
 497         /* scan start of address */
 498         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 499                 ;
 500
 501         /* TODO: should start with an alnum? */
 502         bp_++;
 503         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
 504                 ;
 505
 506         if (bp_ != scanpos) {
 507                 /* scan end of address */
 508                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 509                         ;
 510
 511                 /* TODO: really should terminate with an alnum? */
 512                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
 513                         ;
 514                 ep_++;
 515
 516                 if (ep_ > scanpos + 1) {
 517                         *ep = ep_;
 518                         *bp = bp_;
 519                         result = TRUE;
 520                 }
 521         }
 522
 523         if (!result) return FALSE;
 524
 525         /* we now have at least the address. now see if this is <bracketed>; in this
 526          * case we also scan for the informative part. we could make this a useful
 527          * function because it tries to parse out an email address backwards. :) */
 528         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 529                 return TRUE;
 530
 531 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 532 #define IN_STACK()      (ptr > closure_stack)
 533 /* has underrun check */
 534 #define POP_STACK()     if(IN_STACK()) --ptr
 535 /* has overrun check */
 536 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 537 /* has underrun check */
 538 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 539
 540         ep_++;
 541
 542         /* scan for the informative part. */
 543         for (bp_ -= 2; bp_ >= start; bp_--) {
 544                 /* if closure on the stack keep scanning */
 545                 if (PEEK_STACK() == *bp_) {
 546                         POP_STACK();
 547                         continue;
 548                 }
 549                 if (*bp_ == '\'' || *bp_ == '"') {
 550                         PUSH_STACK(*bp_);
 551                         continue;
 552                 }
 553
 554                 /* if nothing in the closure stack, do the special conditions
 555                  * the following if..else expression simply checks whether
 556                  * a token is acceptable. if not acceptable, the clause
 557                  * should terminate the loop with a 'break' */
 558                 if (!PEEK_STACK()) {
 559                         if (*bp_ == '-'
 560                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 561                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 562                                 /* hyphens are allowed, but only in
 563                                    between alnums */
 564                         } else if (!ispunct(*bp_)) {
 565                                 /* but anything not being a punctiation
 566                                    is ok */
 567                         } else {
 568                                 break; /* anything else is rejected */
 569                         }
 570                 }
 571         }
 572
 573         bp_++;
 574
 575 #undef PEEK_STACK
 576 #undef PUSH_STACK
 577 #undef POP_STACK
 578 #undef IN_STACK
 579 #undef FULL_STACK
 580
 581         /* scan forward (should start with an alnum) */
 582         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 583                 ;
 584
 585         *ep = ep_;
 586         *bp = bp_;
 587
 588         return result;
 589 }
 590
 591 #undef IS_RFC822_CHAR
 592
 593 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 594 {
 595         /* returns a mailto: URI; mailto: is also used to detect the
 596          * uri type later on in the button_pressed signal handler */
 597         gchar *tmp;
 598         gchar *result;
 599
 600         tmp = g_strndup(bp, ep - bp);
 601         result = g_strconcat("mailto:", tmp, NULL);
 602         g_free(tmp);
 603
 604         return result;
 605 }
 606
 607 #define ADD_TXT_POS(bp_, ep_, pti_) \
 608         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 609                 last = last->next; \
 610                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 611                 last->next = NULL; \
 612         } else { \
 613                 g_warning("alloc error scanning URIs\n"); \
 614                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 615                                 linebuf, -1); \
 616                 return; \
 617         }
 618
 619 /* textview_make_clickable_parts() - colorizes clickable parts */
 620 static void textview_make_clickable_parts(TextView *textview,
 621                                           GdkFont  *font,
 622                                           GdkColor *fg_color,
 623                                           GdkColor *uri_color,
 624                                           const gchar *linebuf)
 625 {
 626         /* parse table - in order of priority */
 627         struct table {
 628                 const gchar *needle; /* token */
 629
 630                 /* token search function */
 631                 gchar    *(*search)     (const gchar *haystack,
 632                                          const gchar *needle);
 633                 /* part parsing function */
 634                 gboolean  (*parse)      (const gchar *start,
 635                                          const gchar *scanpos,
 636                                          const gchar **bp_,
 637                                          const gchar **ep_);
 638                 /* part to URI function */
 639                 gchar    *(*build_uri)  (const gchar *bp,
 640                                          const gchar *ep);
 641         };
 642
 643         static struct table parser[] = {
 644                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 645                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 646                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 647                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 648                 {"@",        strcasestr, get_email_part, make_email_string}
 649         };
 650         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 651
 652         gint  n;
 653         const gchar *walk, *bp, *ep;
 654
 655         struct txtpos {
 656                 const gchar     *bp, *ep;       /* text position */
 657                 gint             pti;           /* index in parse table */
 658                 struct txtpos   *next;          /* next */
 659         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 660
 661         GtkText *text = GTK_TEXT(textview->text);
 662
 663         /* parse for clickable parts, and build a list of begin and end positions  */
 664         for (walk = linebuf, n = 0;;) {
 665                 gint last_index = PARSE_ELEMS;
 666                 gchar *scanpos = NULL;
 667
 668                 /* FIXME: this looks phony. scanning for anything in the parse table */
 669                 for (n = 0; n < PARSE_ELEMS; n++) {
 670                         gchar *tmp;
 671
 672                         tmp = parser[n].search(walk, parser[n].needle);
 673                         if (tmp) {
 674                                 if (scanpos == NULL || tmp < scanpos) {
 675                                         scanpos = tmp;
 676                                         last_index = n;
 677                                 }
 678                         }
 679                 }
 680
 681                 if (scanpos) {
 682                         /* check if URI can be parsed */
 683                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 684                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 685                                         ADD_TXT_POS(bp, ep, last_index);
 686                                         walk = ep;
 687                         } else
 688                                 walk = scanpos +
 689                                         strlen(parser[last_index].needle);
 690                 } else
 691                         break;
 692         }
 693
 694         /* colorize this line */
 695         if (head.next) {
 696                 const gchar *normal_text = linebuf;
 697
 698                 /* insert URIs */
 699                 for (last = head.next; last != NULL;
 700                      normal_text = last->ep, last = last->next) {
 701                         RemoteURI *uri;
 702
 703                         uri = g_new(RemoteURI, 1);
 704                         if (last->bp - normal_text > 0)
 705                                 gtk_text_insert(text, font,
 706                                                 fg_color, NULL,
 707                                                 normal_text,
 708                                                 last->bp - normal_text);
 709                         uri->uri = parser[last->pti].build_uri(last->bp,
 710                                                 last->ep);
 711                         uri->start = gtk_text_get_point(text);
 712                         gtk_text_insert(text, font, uri_color,
 713                                         NULL, last->bp, last->ep - last->bp);
 714                         uri->end = gtk_text_get_point(text);
 715                         textview->uri_list =
 716                                 g_slist_append(textview->uri_list, uri);
 717                 }
 718
 719                 if (*normal_text)
 720                         gtk_text_insert(text, font, fg_color,
 721                                         NULL, normal_text, -1);
 722         } else
 723                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 724 }
 725
 726 #undef ADD_TXT_POS
 727
 728 static void textview_write_line(TextView *textview, const gchar *str,
 729                                 CodeConverter *conv)
 730 {
 731         GtkText *text = GTK_TEXT(textview->text);
 732         gchar buf[BUFFSIZE];
 733         size_t len;
 734         GdkColor *fg_color;
 735         gint quotelevel = -1;
 736
 737         if (!conv)
 738                 strncpy2(buf, str, sizeof(buf));
 739         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 740                 gtk_text_insert(text, textview->msgfont,
 741                                 prefs_common.enable_color
 742                                 ? &error_color : NULL, NULL,
 743                                 "*** Warning: code conversion failed ***\n",
 744                                 -1);
 745                 return;
 746         }
 747
 748         len = strlen(buf);
 749         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 750                 buf[len - 2] = '\n';
 751                 buf[len - 1] = '\0';
 752         }
 753         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 754         fg_color = NULL;
 755
 756         /* change color of quotation
 757            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 758            Up to 3 levels of quotations are detected, and each
 759            level is colored using a different color. */
 760         if (prefs_common.enable_color && strchr(buf, '>')) {
 761                 quotelevel = get_quote_level(buf);
 762
 763                 /* set up the correct foreground color */
 764                 if (quotelevel > 2) {
 765                         /* recycle colors */
 766                         if (prefs_common.recycle_quote_colors)
 767                                 quotelevel %= 3;
 768                         else
 769                                 quotelevel = 2;
 770                 }
 771         }
 772
 773         if (quotelevel == -1)
 774                 fg_color = NULL;
 775         else
 776                 fg_color = &quote_colors[quotelevel];
 777
 778         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 779                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 780
 781         if (prefs_common.enable_color)
 782                 textview_make_clickable_parts(textview, textview->msgfont,
 783                                               fg_color, &uri_color, buf);
 784         else
 785                 gtk_text_insert(text, textview->msgfont, fg_color, NULL,
 786                                 buf, -1);
 787 }
 788
 789 void textview_clear(TextView *textview)
 790 {
 791         GtkText *text = GTK_TEXT(textview->text);
 792
 793         gtk_text_freeze(text);
 794         gtk_text_backward_delete(text, gtk_text_get_length(text));
 795         gtk_text_thaw(text);
 796
 797         textview_uri_list_remove_all(textview->uri_list);
 798         textview->uri_list = NULL;
 799 }
 800
 801 void textview_destroy(TextView *textview)
 802 {
 803         textview_uri_list_remove_all(textview->uri_list);
 804         textview->uri_list = NULL;
 805
 806         if (!textview->scrolledwin_sb->parent)
 807                 gtk_widget_destroy(textview->scrolledwin_sb);
 808         if (!textview->scrolledwin_mb->parent)
 809                 gtk_widget_destroy(textview->scrolledwin_mb);
 810
 811         if (textview->msgfont) {
 812                 textview->msgfont->ascent = textview->prev_ascent;
 813                 textview->msgfont->descent = textview->prev_descent;
 814                 gdk_font_unref(textview->msgfont);
 815         }
 816         if (textview->boldfont)
 817                 gdk_font_unref(textview->boldfont);
 818
 819         g_free(textview);
 820 }
 821
 822 void textview_set_font(TextView *textview, const gchar *codeset)
 823 {
 824         gboolean use_fontset = TRUE;
 825
 826         /* In multi-byte mode, GtkText can't display 8bit characters
 827            correctly, so it must be single-byte mode. */
 828         if (MB_CUR_MAX > 1) {
 829                 if (codeset) {
 830                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 831                             !g_strncasecmp(codeset, "KOI8-", 5)     ||
 832                             !g_strncasecmp(codeset, "CP", 2)        ||
 833                             !g_strncasecmp(codeset, "WINDOWS-", 8)  ||
 834                             !g_strcasecmp(codeset, "BALTIC"))
 835                                 use_fontset = FALSE;
 836                 }
 837         } else
 838                 use_fontset = FALSE;
 839
 840         if (textview->text_is_mb && !use_fontset) {
 841                 GtkWidget *parent;
 842
 843                 parent = textview->scrolledwin_mb->parent;
 844                 gtk_editable_select_region
 845                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 846                 gtk_container_remove(GTK_CONTAINER(parent),
 847                                      textview->scrolledwin_mb);
 848                 gtk_container_add(GTK_CONTAINER(parent),
 849                                   textview->scrolledwin_sb);
 850
 851                 textview->text = textview->text_sb;
 852                 textview->text_is_mb = FALSE;
 853         } else if (!textview->text_is_mb && use_fontset) {
 854                 GtkWidget *parent;
 855
 856                 parent = textview->scrolledwin_sb->parent;
 857                 gtk_editable_select_region
 858                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 859                 gtk_container_remove(GTK_CONTAINER(parent),
 860                                      textview->scrolledwin_sb);
 861                 gtk_container_add(GTK_CONTAINER(parent),
 862                                   textview->scrolledwin_mb);
 863
 864                 textview->text = textview->text_mb;
 865                 textview->text_is_mb = TRUE;
 866         }
 867
 868         if (prefs_common.textfont) {
 869                 if (textview->msgfont) {
 870                         textview->msgfont->ascent = textview->prev_ascent;
 871                         textview->msgfont->descent = textview->prev_descent;
 872                         gdk_font_unref(textview->msgfont);
 873                         textview->msgfont = NULL;
 874                 }
 875                 if (use_fontset)
 876                         textview->msgfont =
 877                                 gdk_fontset_load(prefs_common.textfont);
 878                 else {
 879                         if (MB_CUR_MAX > 1) {
 880                                 FONT_LOAD(textview->msgfont,
 881                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 882                         } else {
 883                                 FONT_LOAD(textview->msgfont,
 884                                           prefs_common.textfont);
 885                         }
 886                 }
 887
 888                 if (textview->msgfont) {
 889                         gint ascent, descent;
 890
 891                         textview->prev_ascent = textview->msgfont->ascent;
 892                         textview->prev_descent = textview->msgfont->descent;
 893                         descent = prefs_common.line_space / 2;
 894                         ascent  = prefs_common.line_space - descent;
 895                         textview->msgfont->ascent  += ascent;
 896                         textview->msgfont->descent += descent;
 897                 }
 898         }
 899
 900         if (!textview->boldfont)
 901                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 902         if (!spacingfont)
 903                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 904 }
 905
 906 enum
 907 {
 908         H_DATE          = 0,
 909         H_FROM          = 1,
 910         H_TO            = 2,
 911         H_NEWSGROUPS    = 3,
 912         H_SUBJECT       = 4,
 913         H_CC            = 5,
 914         H_REPLY_TO      = 6,
 915         H_FOLLOWUP_TO   = 7,
 916         H_X_MAILER      = 8,
 917         H_X_NEWSREADER  = 9,
 918         H_USER_AGENT    = 10,
 919         H_ORGANIZATION  = 11,
 920 };
 921
 922 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
 923 {
 924         gchar buf[BUFFSIZE];
 925         GPtrArray *headers, *sorted_headers;
 926         GSList *disphdr_list;
 927         Header *header;
 928         guint i;
 929
 930         textview = textview;
 931
 932         g_return_val_if_fail(fp != NULL, NULL);
 933
 934         if (!prefs_common.display_header) {
 935                 while (fgets(buf, sizeof(buf), fp) != NULL)
 936                         if (buf[0] == '\r' || buf[0] == '\n') break;
 937                 return NULL;
 938         }
 939
 940         headers = procheader_get_header_array_asis(fp);
 941
 942         sorted_headers = g_ptr_array_new();
 943
 944         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
 945              disphdr_list = disphdr_list->next) {
 946                 DisplayHeaderProp *dp =
 947                         (DisplayHeaderProp *)disphdr_list->data;
 948
 949                 for (i = 0; i < headers->len; i++) {
 950                         header = g_ptr_array_index(headers, i);
 951
 952                         if (procheader_headername_equal(header->name,
 953                                                         dp->name)) {
 954                                 if (dp->hidden)
 955                                         procheader_header_free(header);
 956                                 else
 957                                         g_ptr_array_add(sorted_headers, header);
 958
 959                                 g_ptr_array_remove_index(headers, i);
 960                                 i--;
 961                         }
 962                 }
 963         }
 964
 965         if (prefs_common.show_other_header) {
 966                 for (i = 0; i < headers->len; i++) {
 967                         header = g_ptr_array_index(headers, i);
 968                         g_ptr_array_add(sorted_headers, header);
 969                 }
 970         }
 971
 972         g_ptr_array_free(headers, TRUE);
 973         return sorted_headers;
 974 }
 975
 976 static void textview_show_header(TextView *textview, GPtrArray *headers)
 977 {
 978         GtkText *text = GTK_TEXT(textview->text);
 979         Header *header;
 980         guint i;
 981
 982         g_return_if_fail(headers != NULL);
 983
 984         gtk_text_freeze(text);
 985
 986         for (i = 0; i < headers->len; i++) {
 987                 header = g_ptr_array_index(headers, i);
 988                 g_return_if_fail(header->name != NULL);
 989
 990                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
 991                                 header->name, -1);
 992                 gtk_text_insert(text, textview->boldfont, NULL, NULL, " ", 1);
 993
 994                 if (procheader_headername_equal(header->name, "Subject") ||
 995                     procheader_headername_equal(header->name, "From")    ||
 996                     procheader_headername_equal(header->name, "To")      ||
 997                     procheader_headername_equal(header->name, "Cc"))
 998                         unfold_line(header->body);
 999
1000                 if (prefs_common.enable_color &&
1001                     (procheader_headername_equal(header->name, "X-Mailer") ||
1002                      procheader_headername_equal(header->name,
1003                                                  "X-Newsreader")) &&
1004                     strstr(header->body, "Sylpheed") != NULL)
1005                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1006                                         header->body, -1);
1007                 else if (prefs_common.enable_color) {
1008                         textview_make_clickable_parts(textview,
1009                                                       NULL, NULL, &uri_color,
1010                                                       header->body);
1011                 } else {
1012                         gtk_text_insert(text, NULL, NULL, NULL,
1013                                         header->body, -1);
1014                 }
1015                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1016         }
1017
1018         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1019         gtk_text_thaw(text);
1020 }
1021
1022 void textview_scroll_one_line(TextView *textview, gboolean up)
1023 {
1024         GtkText *text = GTK_TEXT(textview->text);
1025         gfloat upper;
1026
1027         if (prefs_common.enable_smooth_scroll) {
1028                 textview_smooth_scroll_one_line(textview, up);
1029                 return;
1030         }
1031
1032         if (!up) {
1033                 upper = text->vadj->upper - text->vadj->page_size;
1034                 if (text->vadj->value < upper) {
1035                         text->vadj->value +=
1036                                 text->vadj->step_increment * 4;
1037                         text->vadj->value =
1038                                 MIN(text->vadj->value, upper);
1039                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1040                                                 "value_changed");
1041                 }
1042         } else {
1043                 if (text->vadj->value > 0.0) {
1044                         text->vadj->value -=
1045                                 text->vadj->step_increment * 4;
1046                         text->vadj->value =
1047                                 MAX(text->vadj->value, 0.0);
1048                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1049                                                 "value_changed");
1050                 }
1051         }
1052 }
1053
1054 gboolean textview_scroll_page(TextView *textview, gboolean up)
1055 {
1056         GtkText *text = GTK_TEXT(textview->text);
1057         gfloat upper;
1058         gfloat page_incr;
1059
1060         if (prefs_common.enable_smooth_scroll)
1061                 return textview_smooth_scroll_page(textview, up);
1062
1063         if (prefs_common.scroll_halfpage)
1064                 page_incr = text->vadj->page_increment / 2;
1065         else
1066                 page_incr = text->vadj->page_increment;
1067
1068         if (!up) {
1069                 upper = text->vadj->upper - text->vadj->page_size;
1070                 if (text->vadj->value < upper) {
1071                         text->vadj->value += page_incr;
1072                         text->vadj->value = MIN(text->vadj->value, upper);
1073                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1074                                                 "value_changed");
1075                 } else
1076                         return FALSE;
1077         } else {
1078                 if (text->vadj->value > 0.0) {
1079                         text->vadj->value -= page_incr;
1080                         text->vadj->value = MAX(text->vadj->value, 0.0);
1081                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1082                                                 "value_changed");
1083                 } else
1084                         return FALSE;
1085         }
1086
1087         return TRUE;
1088 }
1089
1090 static void textview_smooth_scroll_do(TextView *textview,
1091                                       gfloat old_value, gfloat last_value,
1092                                       gint step)
1093 {
1094         GtkText *text = GTK_TEXT(textview->text);
1095         gint change_value;
1096         gboolean up;
1097         gint i;
1098
1099         if (old_value < last_value) {
1100                 change_value = last_value - old_value;
1101                 up = FALSE;
1102         } else {
1103                 change_value = old_value - last_value;
1104                 up = TRUE;
1105         }
1106
1107         gdk_key_repeat_disable();
1108
1109         for (i = step; i <= change_value; i += step) {
1110                 text->vadj->value = old_value + (up ? -i : i);
1111                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1112                                         "value_changed");
1113         }
1114
1115         text->vadj->value = last_value;
1116         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1117
1118         gdk_key_repeat_restore();
1119 }
1120
1121 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1122 {
1123         GtkText *text = GTK_TEXT(textview->text);
1124         gfloat upper;
1125         gfloat old_value;
1126         gfloat last_value;
1127
1128         if (!up) {
1129                 upper = text->vadj->upper - text->vadj->page_size;
1130                 if (text->vadj->value < upper) {
1131                         old_value = text->vadj->value;
1132                         last_value = text->vadj->value +
1133                                 text->vadj->step_increment * 4;
1134                         last_value = MIN(last_value, upper);
1135
1136                         textview_smooth_scroll_do(textview, old_value,
1137                                                   last_value,
1138                                                   prefs_common.scroll_step);
1139                 }
1140         } else {
1141                 if (text->vadj->value > 0.0) {
1142                         old_value = text->vadj->value;
1143                         last_value = text->vadj->value -
1144                                 text->vadj->step_increment * 4;
1145                         last_value = MAX(last_value, 0.0);
1146
1147                         textview_smooth_scroll_do(textview, old_value,
1148                                                   last_value,
1149                                                   prefs_common.scroll_step);
1150                 }
1151         }
1152 }
1153
1154 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1155 {
1156         GtkText *text = GTK_TEXT(textview->text);
1157         gfloat upper;
1158         gfloat page_incr;
1159         gfloat old_value;
1160         gfloat last_value;
1161
1162         if (prefs_common.scroll_halfpage)
1163                 page_incr = text->vadj->page_increment / 2;
1164         else
1165                 page_incr = text->vadj->page_increment;
1166
1167         if (!up) {
1168                 upper = text->vadj->upper - text->vadj->page_size;
1169                 if (text->vadj->value < upper) {
1170                         old_value = text->vadj->value;
1171                         last_value = text->vadj->value + page_incr;
1172                         last_value = MIN(last_value, upper);
1173
1174                         textview_smooth_scroll_do(textview, old_value,
1175                                                   last_value,
1176                                                   prefs_common.scroll_step);
1177                 } else
1178                         return FALSE;
1179         } else {
1180                 if (text->vadj->value > 0.0) {
1181                         old_value = text->vadj->value;
1182                         last_value = text->vadj->value - page_incr;
1183                         last_value = MAX(last_value, 0.0);
1184
1185                         textview_smooth_scroll_do(textview, old_value,
1186                                                   last_value,
1187                                                   prefs_common.scroll_step);
1188                 } else
1189                         return FALSE;
1190         }
1191
1192         return TRUE;
1193 }
1194
1195 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1196                                  TextView *textview)
1197 {
1198         SummaryView *summaryview = NULL;
1199
1200         widget = widget;
1201
1202         if (!event) return;
1203         if (textview->messageview->mainwin)
1204                 summaryview = textview->messageview->mainwin->summaryview;
1205
1206         switch (event->keyval) {
1207         case GDK_Tab:
1208         case GDK_Home:
1209         case GDK_Left:
1210         case GDK_Up:
1211         case GDK_Right:
1212         case GDK_Down:
1213         case GDK_Page_Up:
1214         case GDK_Page_Down:
1215         case GDK_End:
1216         case GDK_Control_L:
1217         case GDK_Control_R:
1218                 break;
1219         case GDK_space:
1220                 if (summaryview)
1221                         summary_pass_key_press_event(summaryview, event);
1222                 else
1223                         textview_scroll_page(textview, FALSE);
1224                 break;
1225         case GDK_BackSpace:
1226         case GDK_Delete:
1227                 textview_scroll_page(textview, TRUE);
1228                 break;
1229         case GDK_Return:
1230                 textview_scroll_one_line(textview,
1231                                          (event->state & GDK_MOD1_MASK) != 0);
1232                 break;
1233         default:
1234                 if (summaryview)
1235                         summary_pass_key_press_event(summaryview, event);
1236                 break;
1237         }
1238 }
1239
1240 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1241                                     TextView *textview)
1242 {
1243         widget = widget;
1244         if (event &&
1245             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1246                 || event->button == 2
1247                 || event->button == 3)) {
1248                 GSList *cur;
1249                 guint current_pos;
1250
1251                 current_pos = GTK_EDITABLE(textview->text)->current_pos;
1252
1253                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1254                         RemoteURI *uri = (RemoteURI *)cur->data;
1255
1256                         if (current_pos >= uri->start &&
1257                             current_pos <  uri->end) {
1258                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1259                                         compose_new_with_recipient
1260                                                 (NULL, uri->uri + 7);
1261                                 }
1262                                 else
1263                                         open_uri(uri->uri,
1264                                                  prefs_common.uri_cmd);
1265                         }
1266                 }
1267         }
1268 }
1269
1270 static void textview_uri_list_remove_all(GSList *uri_list)
1271 {
1272         GSList *cur;
1273
1274         for (cur = uri_list; cur != NULL; cur = cur->next) {
1275                 if (cur->data) {
1276                         g_free(((RemoteURI *)cur->data)->uri);
1277                         g_free(cur->data);
1278                 }
1279         }
1280
1281         g_slist_free(uri_list);
1282 }