src/textview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <gdk/gdk.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <gtk/gtkvbox.h>
  30 #include <gtk/gtkscrolledwindow.h>
  31 #include <gtk/gtktext.h>
  32 #include <gtk/gtksignal.h>
  33 #include <stdio.h>
  34 #include <ctype.h>
  35 #include <string.h>
  36 #include <stdlib.h>
  37
  38 #include "intl.h"
  39 #include "main.h"
  40 #include "summaryview.h"
  41 #include "procheader.h"
  42 #include "prefs_common.h"
  43 #include "codeconv.h"
  44 #include "utils.h"
  45 #include "gtkutils.h"
  46 #include "procmime.h"
  47 #include "html.h"
  48 #include "enriched.h"
  49 #include "compose.h"
  50 #include "addressbook.h"
  51 #include "displayheader.h"
  52
  53 #define FONT_LOAD(font, s) \
  54 { \
  55         gchar *fontstr, *p; \
  56  \
  57         Xstrdup_a(fontstr, s, ); \
  58         if ((p = strchr(fontstr, ',')) != NULL) *p = '\0'; \
  59         font = gdk_font_load(fontstr); \
  60 }
  61
  62 typedef struct _RemoteURI       RemoteURI;
  63
  64 struct _RemoteURI
  65 {
  66         gchar *uri;
  67
  68         guint start;
  69         guint end;
  70 };
  71
  72 static GdkColor quote_colors[3] = {
  73         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  74         {(gulong)0, (gushort)0, (gushort)0, (gushort)0},
  75         {(gulong)0, (gushort)0, (gushort)0, (gushort)0}
  76 };
  77
  78 static GdkColor uri_color = {
  79         (gulong)0,
  80         (gushort)0,
  81         (gushort)0,
  82         (gushort)0
  83 };
  84
  85 static GdkColor emphasis_color = {
  86         (gulong)0,
  87         (gushort)0,
  88         (gushort)0,
  89         (gushort)0xcfff
  90 };
  91
  92 static GdkColor error_color = {
  93         (gulong)0,
  94         (gushort)0xefff,
  95         (gushort)0,
  96         (gushort)0
  97 };
  98
  99 static GdkFont *spacingfont;
 100
 101 static void textview_show_ertf          (TextView       *textview,
 102                                          FILE           *fp,
 103                                          CodeConverter  *conv);
 104 static void textview_show_html          (TextView       *textview,
 105                                          FILE           *fp,
 106                                          CodeConverter  *conv);
 107 static void textview_write_line         (TextView       *textview,
 108                                          const gchar    *str,
 109                                          CodeConverter  *conv);
 110 static void textview_write_link         (TextView       *textview,
 111                                          const gchar    *url,
 112                                          const gchar    *str,
 113                                          CodeConverter  *conv);
 114 static GPtrArray *textview_scan_header  (TextView       *textview,
 115                                          FILE           *fp);
 116 static void textview_show_header        (TextView       *textview,
 117                                          GPtrArray      *headers);
 118
 119 static void textview_key_pressed        (GtkWidget      *widget,
 120                                          GdkEventKey    *event,
 121                                          TextView       *textview);
 122 static gint textview_button_pressed     (GtkWidget      *widget,
 123                                          GdkEventButton *event,
 124                                          TextView       *textview);
 125 static gint textview_button_released    (GtkWidget      *widget,
 126                                          GdkEventButton *event,
 127                                          TextView       *textview);
 128
 129 static void textview_uri_list_remove_all(GSList         *uri_list);
 130
 131 static void textview_smooth_scroll_do           (TextView       *textview,
 132                                                  gfloat          old_value,
 133                                                  gfloat          last_value,
 134                                                  gint            step);
 135 static void textview_smooth_scroll_one_line     (TextView       *textview,
 136                                                  gboolean        up);
 137 static gboolean textview_smooth_scroll_page     (TextView       *textview,
 138                                                  gboolean        up);
 139
 140
 141 TextView *textview_create(void)
 142 {
 143         TextView *textview;
 144         GtkWidget *vbox;
 145         GtkWidget *scrolledwin_sb;
 146         GtkWidget *scrolledwin_mb;
 147         GtkWidget *text_sb;
 148         GtkWidget *text_mb;
 149
 150         debug_print(_("Creating text view...\n"));
 151         textview = g_new0(TextView, 1);
 152
 153         scrolledwin_sb = gtk_scrolled_window_new(NULL, NULL);
 154         scrolledwin_mb = gtk_scrolled_window_new(NULL, NULL);
 155         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_sb),
 156                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 157         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin_mb),
 158                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 159         gtk_widget_set_usize(scrolledwin_sb, prefs_common.mainview_width, -1);
 160         gtk_widget_set_usize(scrolledwin_mb, prefs_common.mainview_width, -1);
 161
 162         /* create GtkText widgets for single-byte and multi-byte character */
 163         text_sb = gtk_text_new(NULL, NULL);
 164         text_mb = gtk_text_new(NULL, NULL);
 165         GTK_TEXT(text_sb)->default_tab_width = 8;
 166         GTK_TEXT(text_mb)->default_tab_width = 8;
 167         gtk_widget_show(text_sb);
 168         gtk_widget_show(text_mb);
 169         gtk_text_set_word_wrap(GTK_TEXT(text_sb), TRUE);
 170         gtk_text_set_word_wrap(GTK_TEXT(text_mb), TRUE);
 171         gtk_widget_ensure_style(text_sb);
 172         gtk_widget_ensure_style(text_mb);
 173         if (text_sb->style && text_sb->style->font->type == GDK_FONT_FONTSET) {
 174                 GtkStyle *style;
 175
 176                 style = gtk_style_copy(text_sb->style);
 177                 gdk_font_unref(style->font);
 178                 FONT_LOAD(style->font, NORMAL_FONT);
 179                 gtk_widget_set_style(text_sb, style);
 180         }
 181         if (text_mb->style && text_mb->style->font->type == GDK_FONT_FONT) {
 182                 GtkStyle *style;
 183
 184                 style = gtk_style_copy(text_mb->style);
 185                 gdk_font_unref(style->font);
 186                 style->font = gdk_fontset_load(NORMAL_FONT);
 187                 gtk_widget_set_style(text_mb, style);
 188         }
 189         gtk_widget_ref(scrolledwin_sb);
 190         gtk_widget_ref(scrolledwin_mb);
 191
 192         gtk_container_add(GTK_CONTAINER(scrolledwin_sb), text_sb);
 193         gtk_container_add(GTK_CONTAINER(scrolledwin_mb), text_mb);
 194         gtk_signal_connect(GTK_OBJECT(text_sb), "key_press_event",
 195                            GTK_SIGNAL_FUNC(textview_key_pressed),
 196                            textview);
 197         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_press_event",
 198                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 199                                  textview);
 200         gtk_signal_connect_after(GTK_OBJECT(text_sb), "button_release_event",
 201                                  GTK_SIGNAL_FUNC(textview_button_released),
 202                                  textview);
 203         gtk_signal_connect(GTK_OBJECT(text_mb), "key_press_event",
 204                            GTK_SIGNAL_FUNC(textview_key_pressed),
 205                            textview);
 206         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_press_event",
 207                                  GTK_SIGNAL_FUNC(textview_button_pressed),
 208                                  textview);
 209         gtk_signal_connect_after(GTK_OBJECT(text_mb), "button_release_event",
 210                                  GTK_SIGNAL_FUNC(textview_button_released),
 211                                  textview);
 212
 213         gtk_widget_show(scrolledwin_sb);
 214         gtk_widget_show(scrolledwin_mb);
 215
 216         vbox = gtk_vbox_new(FALSE, 0);
 217         gtk_box_pack_start(GTK_BOX(vbox), scrolledwin_sb, TRUE, TRUE, 0);
 218
 219         textview->vbox           = vbox;
 220         textview->scrolledwin    = scrolledwin_sb;
 221         textview->scrolledwin_sb = scrolledwin_sb;
 222         textview->scrolledwin_mb = scrolledwin_mb;
 223         textview->text           = text_sb;
 224         textview->text_sb        = text_sb;
 225         textview->text_mb        = text_mb;
 226         textview->text_is_mb     = FALSE;
 227         textview->uri_list       = NULL;
 228         textview->body_pos       = 0;
 229         textview->cur_pos        = 0;
 230         textview->last_buttonpress = GDK_NOTHING;
 231
 232         return textview;
 233 }
 234
 235 void textview_init(TextView *textview)
 236 {
 237         gtkut_widget_disable_theme_engine(textview->text_sb);
 238         gtkut_widget_disable_theme_engine(textview->text_mb);
 239         textview_update_message_colors();
 240         textview_set_font(textview, NULL);
 241 }
 242
 243 void textview_update_message_colors(void)
 244 {
 245         GdkColor black = {0, 0, 0, 0};
 246
 247         if (prefs_common.enable_color) {
 248                 /* grab the quote colors, converting from an int to a GdkColor */
 249                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level1_col,
 250                                                &quote_colors[0]);
 251                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level2_col,
 252                                                &quote_colors[1]);
 253                 gtkut_convert_int_to_gdk_color(prefs_common.quote_level3_col,
 254                                                &quote_colors[2]);
 255                 gtkut_convert_int_to_gdk_color(prefs_common.uri_col,
 256                                                &uri_color);
 257         } else {
 258                 quote_colors[0] = quote_colors[1] = quote_colors[2] =
 259                         uri_color = emphasis_color = black;
 260         }
 261 }
 262
 263 void textview_show_message(TextView *textview, MimeInfo *mimeinfo,
 264                            const gchar *file)
 265 {
 266         FILE *fp;
 267
 268         if ((fp = fopen(file, "r")) == NULL) {
 269                 FILE_OP_ERROR(file, "fopen");
 270                 return;
 271         }
 272
 273         textview_show_part(textview, mimeinfo, fp);
 274
 275         fclose(fp);
 276 }
 277
 278 void textview_show_part(TextView *textview, MimeInfo *mimeinfo, FILE *fp)
 279 {
 280         GtkText *text;
 281         gchar buf[BUFFSIZE];
 282         const gchar *boundary = NULL;
 283         gint boundary_len = 0;
 284         const gchar *charset = NULL;
 285         FILE *tmpfp;
 286         GPtrArray *headers = NULL;
 287         CodeConverter *conv;
 288
 289         g_return_if_fail(mimeinfo != NULL);
 290         g_return_if_fail(fp != NULL);
 291
 292         if (mimeinfo->mime_type == MIME_MULTIPART) {
 293                 if (mimeinfo->sub) {
 294                         mimeinfo = mimeinfo->sub;
 295                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0) {
 296                                 perror("fseek");
 297                                 return;
 298                         }
 299                 } else
 300                         return;
 301         }
 302         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 303                 boundary = mimeinfo->parent->boundary;
 304                 boundary_len = strlen(boundary);
 305         }
 306
 307         if (!boundary && (mimeinfo->mime_type == MIME_TEXT || mimeinfo->mime_type == MIME_TEXT_HTML || mimeinfo->mime_type == MIME_TEXT_ENRICHED)) {
 308
 309                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 310                         perror("fseek");
 311                 headers = textview_scan_header(textview, fp);
 312         } else {
 313                 if (mimeinfo->mime_type == MIME_TEXT && mimeinfo->parent) {
 314                         glong fpos;
 315                         MimeInfo *parent = mimeinfo->parent;
 316
 317                         while (parent->parent) {
 318                                 if (parent->main &&
 319                                     parent->main->mime_type ==
 320                                         MIME_MESSAGE_RFC822)
 321                                         break;
 322                                 parent = parent->parent;
 323                         }
 324
 325                         if ((fpos = ftell(fp)) < 0)
 326                                 perror("ftell");
 327                         else if (fseek(fp, parent->fpos, SEEK_SET) < 0)
 328                                 perror("fseek");
 329                         else {
 330                                 headers = textview_scan_header(textview, fp);
 331                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 332                                         perror("fseek");
 333                         }
 334                 }
 335                 /* skip MIME part headers */
 336                 while (fgets(buf, sizeof(buf), fp) != NULL)
 337                         if (buf[0] == '\r' || buf[0] == '\n') break;
 338         }
 339
 340         /* display attached RFC822 single text message */
 341         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 342                 if (headers) procheader_header_array_destroy(headers);
 343                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 344                 headers = textview_scan_header(textview, fp);
 345                 mimeinfo = mimeinfo->sub;
 346         } else if (!mimeinfo->parent &&
 347                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 348                 if (headers) procheader_header_array_destroy(headers);
 349                 if (!mimeinfo->sub) return;
 350                 headers = textview_scan_header(textview, fp);
 351                 mimeinfo = mimeinfo->sub;
 352         }
 353
 354         if (prefs_common.force_charset)
 355                 charset = prefs_common.force_charset;
 356         else if (mimeinfo->charset)
 357                 charset = mimeinfo->charset;
 358         textview_set_font(textview, charset);
 359
 360         conv = conv_code_converter_new(charset);
 361
 362         textview_clear(textview);
 363         text = GTK_TEXT(textview->text);
 364         gtk_text_freeze(text);
 365
 366         textview->body_pos = 0;
 367         textview->cur_pos  = 0;
 368
 369         if (headers) {
 370                 textview_show_header(textview, headers);
 371                 procheader_header_array_destroy(headers);
 372         }
 373
 374         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 375         if (tmpfp) {
 376                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 377                         textview_show_html(textview, tmpfp, conv);
 378                 else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED)
 379                         textview_show_ertf(textview, tmpfp, conv);
 380                 else
 381                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 382                                 textview_write_line(textview, buf, conv);
 383                 fclose(tmpfp);
 384         }
 385
 386         conv_code_converter_destroy(conv);
 387
 388         gtk_text_thaw(text);
 389 }
 390
 391 #define TEXT_INSERT(str) \
 392         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
 393
 394 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 395 {
 396         GtkText *text;
 397
 398         if (!partinfo) return;
 399
 400         textview_set_font(textview, NULL);
 401         text = GTK_TEXT(textview->text);
 402         textview_clear(textview);
 403
 404         gtk_text_freeze(text);
 405
 406         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 407         TEXT_INSERT(_("right click and select `Save as...', "));
 408         TEXT_INSERT(_("or press `y' key.\n\n"));
 409
 410         TEXT_INSERT(_("To display this part as a text message, select "));
 411         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 412
 413         TEXT_INSERT(_("To open this part with external program, select "));
 414         TEXT_INSERT(_("`Open' or `Open with...', "));
 415         TEXT_INSERT(_("or double-click, or click the center button, "));
 416         TEXT_INSERT(_("or press `l' key."));
 417
 418         gtk_text_thaw(text);
 419 }
 420
 421 #if USE_GPGME
 422 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 423 {
 424         GtkText *text;
 425
 426         if (!partinfo) return;
 427
 428         textview_set_font(textview, NULL);
 429         text = GTK_TEXT(textview->text);
 430         textview_clear(textview);
 431
 432         gtk_text_freeze(text);
 433
 434         if (partinfo->sigstatus_full == NULL) {
 435                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 436                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 437                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 438         } else {
 439                 TEXT_INSERT(partinfo->sigstatus_full);
 440         }
 441
 442         gtk_text_thaw(text);
 443 }
 444 #endif /* USE_GPGME */
 445
 446 #undef TEXT_INSERT
 447
 448 static void textview_show_html(TextView *textview, FILE *fp,
 449                                CodeConverter *conv)
 450 {
 451         HTMLParser *parser;
 452         gchar *str;
 453         gchar* url = NULL;
 454
 455         parser = html_parser_new(fp, conv);
 456         g_return_if_fail(parser != NULL);
 457
 458         while ((str = html_parse(parser)) != NULL) {
 459                 if (parser->state == HTML_HREF) {
 460                         /* first time : get and copy the URL */
 461                         if (url == NULL) {
 462                                 /* ALF - the sylpheed html parser returns an empty string,
 463                                  * if still inside an <a>, but already parsed past HREF */
 464                                 str = strtok(str, " ");
 465                                 if (str) {
 466                                         url = strdup(str);
 467                                         /* the URL may (or not) be followed by the
 468                                          * referenced text */
 469                                         str = strtok(NULL, "");
 470                                 }
 471                         }
 472                         if (str != NULL) {
 473                                 textview_write_link(textview, url, str, NULL);
 474                         }
 475                 } else {
 476                         if (url != NULL) {
 477                                 free(url);
 478                                 url = NULL;
 479                         }
 480                         textview_write_line(textview, str, NULL);
 481                 }
 482         }
 483         html_parser_destroy(parser);
 484 }
 485
 486 static void textview_show_ertf(TextView *textview, FILE *fp,
 487                                CodeConverter *conv)
 488 {
 489         ERTFParser *parser;
 490         gchar *str;
 491         gchar* url = NULL;
 492
 493         parser = ertf_parser_new(fp, conv);
 494         g_return_if_fail(parser != NULL);
 495
 496         while ((str = ertf_parse(parser)) != NULL) {
 497                 textview_write_line(textview, str, NULL);
 498         }
 499         ertf_parser_destroy(parser);
 500 }
 501
 502 /* get_uri_part() - retrieves a URI starting from scanpos.
 503                     Returns TRUE if succesful */
 504 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 505                              const gchar **bp, const gchar **ep)
 506 {
 507         const gchar *ep_;
 508
 509         g_return_val_if_fail(start != NULL, FALSE);
 510         g_return_val_if_fail(scanpos != NULL, FALSE);
 511         g_return_val_if_fail(bp != NULL, FALSE);
 512         g_return_val_if_fail(ep != NULL, FALSE);
 513
 514         *bp = scanpos;
 515
 516         /* find end point of URI */
 517         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 518                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 519                         break;
 520         }
 521
 522         /* no punctuation at end of string */
 523
 524         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 525          * should pass some URI type to this function and decide on that whether
 526          * to perform punctuation stripping */
 527
 528 #define IS_REAL_PUNCT(ch)       (ispunct(ch) && ((ch) != '/'))
 529
 530         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 531                 ;
 532
 533 #undef IS_REAL_PUNCT
 534
 535         *ep = ep_;
 536
 537         return TRUE;
 538 }
 539
 540 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 541 {
 542         return g_strndup(bp, ep - bp);
 543 }
 544
 545 /* valid mail address characters */
 546 #define IS_RFC822_CHAR(ch) \
 547         (isascii(ch) && \
 548          (ch) > 32   && \
 549          (ch) != 127 && \
 550          !isspace(ch) && \
 551          !strchr("()<>\"", (ch)))
 552
 553 /* alphabet and number within 7bit ASCII */
 554 #define IS_ASCII_ALNUM(ch)      (isascii(ch) && isalnum(ch))
 555 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 556
 557 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 558 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 559                                const gchar **bp, const gchar **ep)
 560 {
 561         /* more complex than the uri part because we need to scan back and forward starting from
 562          * the scan position. */
 563         gboolean result = FALSE;
 564         const gchar *bp_ = NULL;
 565         const gchar *ep_ = NULL;
 566
 567         /* the informative part of the email address (describing the name
 568          * of the email address owner) may contain quoted parts. the
 569          * closure stack stores the last encountered quotes. */
 570         gchar closure_stack[128];
 571         gchar *ptr = closure_stack;
 572
 573         g_return_val_if_fail(start != NULL, FALSE);
 574         g_return_val_if_fail(scanpos != NULL, FALSE);
 575         g_return_val_if_fail(bp != NULL, FALSE);
 576         g_return_val_if_fail(ep != NULL, FALSE);
 577
 578         /* scan start of address */
 579         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 580                 ;
 581
 582         /* TODO: should start with an alnum? */
 583         bp_++;
 584         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*bp_); bp_++)
 585                 ;
 586
 587         if (bp_ != scanpos) {
 588                 /* scan end of address */
 589                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 590                         ;
 591
 592                 /* TODO: really should terminate with an alnum? */
 593                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*ep_); --ep_)
 594                         ;
 595                 ep_++;
 596
 597                 if (ep_ > scanpos + 1) {
 598                         *ep = ep_;
 599                         *bp = bp_;
 600                         result = TRUE;
 601                 }
 602         }
 603
 604         if (!result) return FALSE;
 605
 606         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 607         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 608                 return FALSE;
 609
 610         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 611         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 612                 return TRUE;
 613
 614 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 615 #define IN_STACK()      (ptr > closure_stack)
 616 /* has underrun check */
 617 #define POP_STACK()     if(IN_STACK()) --ptr
 618 /* has overrun check */
 619 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 620 /* has underrun check */
 621 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 622
 623         ep_++;
 624
 625         /* scan for the informative part. */
 626         for (bp_ -= 2; bp_ >= start; bp_--) {
 627                 /* if closure on the stack keep scanning */
 628                 if (PEEK_STACK() == *bp_) {
 629                         POP_STACK();
 630                         continue;
 631                 }
 632                 if (*bp_ == '\'' || *bp_ == '"') {
 633                         PUSH_STACK(*bp_);
 634                         continue;
 635                 }
 636
 637                 /* if nothing in the closure stack, do the special conditions
 638                  * the following if..else expression simply checks whether
 639                  * a token is acceptable. if not acceptable, the clause
 640                  * should terminate the loop with a 'break' */
 641                 if (!PEEK_STACK()) {
 642                         if (*bp_ == '-'
 643                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 644                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 645                                 /* hyphens are allowed, but only in
 646                                    between alnums */
 647                         } else if (!ispunct(*bp_)) {
 648                                 /* but anything not being a punctiation
 649                                    is ok */
 650                         } else {
 651                                 break; /* anything else is rejected */
 652                         }
 653                 }
 654         }
 655
 656         bp_++;
 657
 658 #undef PEEK_STACK
 659 #undef PUSH_STACK
 660 #undef POP_STACK
 661 #undef IN_STACK
 662 #undef FULL_STACK
 663
 664         /* scan forward (should start with an alnum) */
 665         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 666                 ;
 667
 668         *ep = ep_;
 669         *bp = bp_;
 670
 671         return result;
 672 }
 673
 674 #undef IS_QUOTE
 675 #undef IS_RFC822_CHAR
 676
 677 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 678 {
 679         /* returns a mailto: URI; mailto: is also used to detect the
 680          * uri type later on in the button_pressed signal handler */
 681         gchar *tmp;
 682         gchar *result;
 683
 684         tmp = g_strndup(bp, ep - bp);
 685         result = g_strconcat("mailto:", tmp, NULL);
 686         g_free(tmp);
 687
 688         return result;
 689 }
 690
 691 #define ADD_TXT_POS(bp_, ep_, pti_) \
 692         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 693                 last = last->next; \
 694                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 695                 last->next = NULL; \
 696         } else { \
 697                 g_warning("alloc error scanning URIs\n"); \
 698                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 699                                 linebuf, -1); \
 700                 return; \
 701         }
 702
 703 /* textview_make_clickable_parts() - colorizes clickable parts */
 704 static void textview_make_clickable_parts(TextView *textview,
 705                                           GdkFont *font,
 706                                           GdkColor *fg_color,
 707                                           GdkColor *uri_color,
 708                                           const gchar *linebuf)
 709 {
 710         /* parse table - in order of priority */
 711         struct table {
 712                 const gchar *needle; /* token */
 713
 714                 /* token search function */
 715                 gchar    *(*search)     (const gchar *haystack,
 716                                          const gchar *needle);
 717                 /* part parsing function */
 718                 gboolean  (*parse)      (const gchar *start,
 719                                          const gchar *scanpos,
 720                                          const gchar **bp_,
 721                                          const gchar **ep_);
 722                 /* part to URI function */
 723                 gchar    *(*build_uri)  (const gchar *bp,
 724                                          const gchar *ep);
 725         };
 726
 727         static struct table parser[] = {
 728                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 729                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 730                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 731                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 732                 {"@",        strcasestr, get_email_part, make_email_string}
 733         };
 734         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 735
 736         gint  n;
 737         const gchar *walk, *bp, *ep;
 738
 739         struct txtpos {
 740                 const gchar     *bp, *ep;       /* text position */
 741                 gint             pti;           /* index in parse table */
 742                 struct txtpos   *next;          /* next */
 743         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 744
 745         GtkText *text = GTK_TEXT(textview->text);
 746
 747         /* parse for clickable parts, and build a list of begin and end positions  */
 748         for (walk = linebuf, n = 0;;) {
 749                 gint last_index = PARSE_ELEMS;
 750                 gchar *scanpos = NULL;
 751
 752                 /* FIXME: this looks phony. scanning for anything in the parse table */
 753                 for (n = 0; n < PARSE_ELEMS; n++) {
 754                         gchar *tmp;
 755
 756                         tmp = parser[n].search(walk, parser[n].needle);
 757                         if (tmp) {
 758                                 if (scanpos == NULL || tmp < scanpos) {
 759                                         scanpos = tmp;
 760                                         last_index = n;
 761                                 }
 762                         }
 763                 }
 764
 765                 if (scanpos) {
 766                         /* check if URI can be parsed */
 767                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 768                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 769                                         ADD_TXT_POS(bp, ep, last_index);
 770                                         walk = ep;
 771                         } else
 772                                 walk = scanpos +
 773                                         strlen(parser[last_index].needle);
 774                 } else
 775                         break;
 776         }
 777
 778         /* colorize this line */
 779         if (head.next) {
 780                 const gchar *normal_text = linebuf;
 781
 782                 /* insert URIs */
 783                 for (last = head.next; last != NULL;
 784                      normal_text = last->ep, last = last->next) {
 785                         RemoteURI *uri;
 786
 787                         uri = g_new(RemoteURI, 1);
 788                         if (last->bp - normal_text > 0)
 789                                 gtk_text_insert(text, font,
 790                                                 fg_color, NULL,
 791                                                 normal_text,
 792                                                 last->bp - normal_text);
 793                         uri->uri = parser[last->pti].build_uri(last->bp,
 794                                                                last->ep);
 795                         uri->start = gtk_text_get_point(text);
 796                         gtk_text_insert(text, font, uri_color,
 797                                         NULL, last->bp, last->ep - last->bp);
 798                         uri->end = gtk_text_get_point(text);
 799                         textview->uri_list =
 800                                 g_slist_append(textview->uri_list, uri);
 801                 }
 802
 803                 if (*normal_text)
 804                         gtk_text_insert(text, font, fg_color,
 805                                         NULL, normal_text, -1);
 806         } else
 807                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 808 }
 809
 810 #undef ADD_TXT_POS
 811
 812 /* This function writes str as a double-clickable link with the given url. */
 813 static void textview_write_link(TextView *textview, const gchar *url,
 814                                 const gchar *str, CodeConverter *conv)
 815 {
 816     GdkColor *link_color = NULL;
 817     RemoteURI* uri;
 818     GtkText *text = GTK_TEXT(textview->text);
 819     gchar buf[BUFFSIZE];
 820
 821     /* this part is taken from textview_write_line. Right now the only place
 822      * that calls this function passes NULL for conv, but you never know. */
 823     if (!conv)
 824             strncpy2(buf, str, sizeof(buf));
 825     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 826             gtk_text_insert(text, textview->msgfont,
 827                             prefs_common.enable_color
 828                             ? &error_color : NULL, NULL,
 829                             "*** Warning: code conversion failed ***\n",
 830                             -1);
 831             return;
 832     }
 833
 834     /* this part is based on the code in make_clickable_parts */
 835     if (prefs_common.enable_color) {
 836         link_color = &uri_color;
 837     }
 838     uri = g_new(RemoteURI, 1);
 839     uri->uri = g_strdup(url);
 840     uri->start = gtk_text_get_point(text);
 841     gtk_text_insert(text, textview->msgfont, link_color, NULL, buf,
 842                     strlen(buf));
 843     uri->end = gtk_text_get_point(text);
 844     textview->uri_list = g_slist_append(textview->uri_list, uri);
 845 }
 846
 847 static void textview_write_line(TextView *textview, const gchar *str,
 848                                 CodeConverter *conv)
 849 {
 850         GtkText *text = GTK_TEXT(textview->text);
 851         gchar buf[BUFFSIZE];
 852         GdkColor *fg_color;
 853         gint quotelevel = -1;
 854
 855         if (!conv)
 856                 strncpy2(buf, str, sizeof(buf));
 857         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 858                 gtk_text_insert(text, textview->msgfont,
 859                                 prefs_common.enable_color
 860                                 ? &error_color : NULL, NULL,
 861                                 "*** Warning: code conversion failed ***\n",
 862                                 -1);
 863                 return;
 864         }
 865
 866         strcrchomp(buf);
 867         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 868         fg_color = NULL;
 869
 870         /* change color of quotation
 871            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 872            Up to 3 levels of quotations are detected, and each
 873            level is colored using a different color. */
 874         if (prefs_common.enable_color && strchr(buf, '>')) {
 875                 quotelevel = get_quote_level(buf);
 876
 877                 /* set up the correct foreground color */
 878                 if (quotelevel > 2) {
 879                         /* recycle colors */
 880                         if (prefs_common.recycle_quote_colors)
 881                                 quotelevel %= 3;
 882                         else
 883                                 quotelevel = 2;
 884                 }
 885         }
 886
 887         if (quotelevel == -1)
 888                 fg_color = NULL;
 889         else
 890                 fg_color = &quote_colors[quotelevel];
 891
 892         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 893                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 894
 895         if (prefs_common.enable_color)
 896                 textview_make_clickable_parts(textview, textview->msgfont,
 897                                               fg_color, &uri_color, buf);
 898         else
 899                 textview_make_clickable_parts(textview, textview->msgfont,
 900                                               fg_color, NULL, buf);
 901 }
 902
 903 void textview_clear(TextView *textview)
 904 {
 905         GtkText *text = GTK_TEXT(textview->text);
 906
 907         gtk_text_freeze(text);
 908         gtk_text_set_point(text, 0);
 909         gtk_text_forward_delete(text, gtk_text_get_length(text));
 910         gtk_text_thaw(text);
 911
 912         textview_uri_list_remove_all(textview->uri_list);
 913         textview->uri_list = NULL;
 914 }
 915
 916 void textview_destroy(TextView *textview)
 917 {
 918         textview_uri_list_remove_all(textview->uri_list);
 919         textview->uri_list = NULL;
 920
 921         if (!textview->scrolledwin_sb->parent)
 922                 gtk_widget_destroy(textview->scrolledwin_sb);
 923         if (!textview->scrolledwin_mb->parent)
 924                 gtk_widget_destroy(textview->scrolledwin_mb);
 925
 926         if (textview->msgfont) {
 927                 textview->msgfont->ascent = textview->prev_ascent;
 928                 textview->msgfont->descent = textview->prev_descent;
 929                 gdk_font_unref(textview->msgfont);
 930         }
 931         if (textview->boldfont)
 932                 gdk_font_unref(textview->boldfont);
 933
 934         g_free(textview);
 935 }
 936
 937 void textview_set_font(TextView *textview, const gchar *codeset)
 938 {
 939         gboolean use_fontset = TRUE;
 940
 941         /* In multi-byte mode, GtkText can't display 8bit characters
 942            correctly, so it must be single-byte mode. */
 943         if (MB_CUR_MAX > 1) {
 944                 if (codeset) {
 945                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 946                             !g_strcasecmp(codeset, "BALTIC"))
 947                                 use_fontset = FALSE;
 948                         else if (conv_get_current_charset() != C_EUC_JP &&
 949                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
 950                                   !g_strncasecmp(codeset, "CP", 2)    ||
 951                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
 952                                 use_fontset = FALSE;
 953                 }
 954         } else
 955                 use_fontset = FALSE;
 956
 957         if (textview->text_is_mb && !use_fontset) {
 958                 GtkWidget *parent;
 959
 960                 parent = textview->scrolledwin_mb->parent;
 961                 gtkut_container_remove(GTK_CONTAINER(parent),
 962                                        textview->scrolledwin_mb);
 963                 gtk_container_add(GTK_CONTAINER(parent),
 964                                   textview->scrolledwin_sb);
 965
 966                 textview->text = textview->text_sb;
 967                 textview->text_is_mb = FALSE;
 968         } else if (!textview->text_is_mb && use_fontset) {
 969                 GtkWidget *parent;
 970
 971                 parent = textview->scrolledwin_sb->parent;
 972                 gtkut_container_remove(GTK_CONTAINER(parent),
 973                                        textview->scrolledwin_sb);
 974                 gtk_container_add(GTK_CONTAINER(parent),
 975                                   textview->scrolledwin_mb);
 976
 977                 textview->text = textview->text_mb;
 978                 textview->text_is_mb = TRUE;
 979         }
 980
 981         if (prefs_common.textfont) {
 982                 if (textview->msgfont) {
 983                         textview->msgfont->ascent = textview->prev_ascent;
 984                         textview->msgfont->descent = textview->prev_descent;
 985                         gdk_font_unref(textview->msgfont);
 986                         textview->msgfont = NULL;
 987                 }
 988                 if (use_fontset)
 989                         textview->msgfont =
 990                                 gdk_fontset_load(prefs_common.textfont);
 991                 else {
 992                         if (MB_CUR_MAX > 1) {
 993                                 FONT_LOAD(textview->msgfont,
 994                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 995                         } else {
 996                                 FONT_LOAD(textview->msgfont,
 997                                           prefs_common.textfont);
 998                         }
 999                 }
1000
1001                 if (textview->msgfont) {
1002                         gint ascent, descent;
1003
1004                         textview->prev_ascent = textview->msgfont->ascent;
1005                         textview->prev_descent = textview->msgfont->descent;
1006                         descent = prefs_common.line_space / 2;
1007                         ascent  = prefs_common.line_space - descent;
1008                         textview->msgfont->ascent  += ascent;
1009                         textview->msgfont->descent += descent;
1010                 }
1011         }
1012
1013         if (!textview->boldfont)
1014                 FONT_LOAD(textview->boldfont, BOLD_FONT);
1015         if (!spacingfont)
1016                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
1017 }
1018
1019 enum
1020 {
1021         H_DATE          = 0,
1022         H_FROM          = 1,
1023         H_TO            = 2,
1024         H_NEWSGROUPS    = 3,
1025         H_SUBJECT       = 4,
1026         H_CC            = 5,
1027         H_REPLY_TO      = 6,
1028         H_FOLLOWUP_TO   = 7,
1029         H_X_MAILER      = 8,
1030         H_X_NEWSREADER  = 9,
1031         H_USER_AGENT    = 10,
1032         H_ORGANIZATION  = 11,
1033 };
1034
1035 void textview_set_position(TextView *textview, gint pos)
1036 {
1037         if (pos < 0) {
1038                 textview->cur_pos =
1039                         gtk_text_get_length(GTK_TEXT(textview->text));
1040         } else {
1041                 textview->cur_pos = pos;
1042         }
1043 }
1044
1045 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1046 {
1047         gchar buf[BUFFSIZE];
1048         GPtrArray *headers, *sorted_headers;
1049         GSList *disphdr_list;
1050         Header *header;
1051         gint i;
1052
1053         g_return_val_if_fail(fp != NULL, NULL);
1054
1055         if (!prefs_common.display_header) {
1056                 while (fgets(buf, sizeof(buf), fp) != NULL)
1057                         if (buf[0] == '\r' || buf[0] == '\n') break;
1058                 return NULL;
1059         }
1060
1061         headers = procheader_get_header_array_asis(fp);
1062
1063         sorted_headers = g_ptr_array_new();
1064
1065         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1066              disphdr_list = disphdr_list->next) {
1067                 DisplayHeaderProp *dp =
1068                         (DisplayHeaderProp *)disphdr_list->data;
1069
1070                 for (i = 0; i < headers->len; i++) {
1071                         header = g_ptr_array_index(headers, i);
1072
1073                         if (procheader_headername_equal(header->name,
1074                                                         dp->name)) {
1075                                 if (dp->hidden)
1076                                         procheader_header_free(header);
1077                                 else
1078                                         g_ptr_array_add(sorted_headers, header);
1079
1080                                 g_ptr_array_remove_index(headers, i);
1081                                 i--;
1082                         }
1083                 }
1084         }
1085
1086         if (prefs_common.show_other_header) {
1087                 for (i = 0; i < headers->len; i++) {
1088                         header = g_ptr_array_index(headers, i);
1089                         g_ptr_array_add(sorted_headers, header);
1090                 }
1091         }
1092
1093         g_ptr_array_free(headers, FALSE);
1094
1095         return sorted_headers;
1096 }
1097
1098 static void textview_show_header(TextView *textview, GPtrArray *headers)
1099 {
1100         GtkText *text = GTK_TEXT(textview->text);
1101         Header *header;
1102         gint i;
1103
1104         g_return_if_fail(headers != NULL);
1105
1106         gtk_text_freeze(text);
1107
1108         for (i = 0; i < headers->len; i++) {
1109                 header = g_ptr_array_index(headers, i);
1110                 g_return_if_fail(header->name != NULL);
1111
1112                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
1113                                 header->name, -1);
1114                 if (header->name[strlen(header->name) - 1] != ' ')
1115                         gtk_text_insert(text, textview->boldfont,
1116                                         NULL, NULL, " ", 1);
1117
1118                 if (procheader_headername_equal(header->name, "Subject") ||
1119                     procheader_headername_equal(header->name, "From")    ||
1120                     procheader_headername_equal(header->name, "To")      ||
1121                     procheader_headername_equal(header->name, "Cc"))
1122                         unfold_line(header->body);
1123
1124                 if (prefs_common.enable_color &&
1125                     (procheader_headername_equal(header->name, "X-Mailer") ||
1126                      procheader_headername_equal(header->name,
1127                                                  "X-Newsreader")) &&
1128                     strstr(header->body, "Sylpheed") != NULL)
1129                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1130                                         header->body, -1);
1131                 else if (prefs_common.enable_color) {
1132                         textview_make_clickable_parts(textview,
1133                                                       NULL, NULL, &uri_color,
1134                                                       header->body);
1135                 } else {
1136                         textview_make_clickable_parts(textview,
1137                                                       NULL, NULL, NULL,
1138                                                       header->body);
1139                 }
1140                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1141         }
1142
1143         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1144         gtk_text_thaw(text);
1145         textview->body_pos = gtk_text_get_length(text);
1146 }
1147
1148 gboolean textview_search_string(TextView *textview, const gchar *str,
1149                                 gboolean case_sens)
1150 {
1151         GtkText *text = GTK_TEXT(textview->text);
1152         gint pos;
1153         wchar_t *wcs;
1154         gint len;
1155         gint text_len;
1156         gboolean found = FALSE;
1157
1158         g_return_val_if_fail(str != NULL, FALSE);
1159
1160         wcs = strdup_mbstowcs(str);
1161         g_return_val_if_fail(wcs != NULL, FALSE);
1162         len = wcslen(wcs);
1163         pos = textview->cur_pos;
1164         if (pos < textview->body_pos)
1165                 pos = textview->body_pos;
1166         text_len = gtk_text_get_length(text);
1167         if (text_len - pos < len) {
1168                 g_free(wcs);
1169                 return FALSE;
1170         }
1171
1172         for (; pos < text_len; pos++) {
1173                 if (text_len - pos < len) break;
1174                 if (gtkut_text_match_string(GTK_TEXT(text), pos, wcs, len, case_sens)
1175                     == TRUE) {
1176                         gtk_editable_set_position(GTK_EDITABLE(text),
1177                                                   pos + len);
1178                         gtk_editable_select_region(GTK_EDITABLE(text),
1179                                                    pos, pos + len);
1180                         textview_set_position(textview, pos + len);
1181                         found = TRUE;
1182                         break;
1183                 }
1184                 if (text_len - pos == len) break;
1185         }
1186
1187         g_free(wcs);
1188         return found;
1189 }
1190
1191 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1192                                          gboolean case_sens)
1193 {
1194         GtkText *text = GTK_TEXT(textview->text);
1195         gint pos;
1196         wchar_t *wcs;
1197         gint len;
1198         gint text_len;
1199         gboolean found = FALSE;
1200
1201         g_return_val_if_fail(str != NULL, FALSE);
1202
1203         wcs = strdup_mbstowcs(str);
1204         g_return_val_if_fail(wcs != NULL, FALSE);
1205         len = wcslen(wcs);
1206         pos = textview->cur_pos;
1207         text_len = gtk_text_get_length(text);
1208         if (text_len - textview->body_pos < len) {
1209                 g_free(wcs);
1210                 return FALSE;
1211         }
1212         if (pos <= textview->body_pos || text_len - pos < len)
1213                 pos = text_len - len;
1214
1215         for (; pos >= textview->body_pos; pos--) {
1216                 if (gtkut_text_match_string(GTK_TEXT(text), pos, wcs, len, case_sens)
1217                     == TRUE) {
1218                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1219                         gtk_editable_select_region(GTK_EDITABLE(text),
1220                                                    pos, pos + len);
1221                         textview_set_position(textview, pos - 1);
1222                         found = TRUE;
1223                         break;
1224                 }
1225                 if (pos == textview->body_pos) break;
1226         }
1227
1228         g_free(wcs);
1229         return found;
1230 }
1231
1232 void textview_scroll_one_line(TextView *textview, gboolean up)
1233 {
1234         GtkText *text = GTK_TEXT(textview->text);
1235         gfloat upper;
1236
1237         if (prefs_common.enable_smooth_scroll) {
1238                 textview_smooth_scroll_one_line(textview, up);
1239                 return;
1240         }
1241
1242         if (!up) {
1243                 upper = text->vadj->upper - text->vadj->page_size;
1244                 if (text->vadj->value < upper) {
1245                         text->vadj->value +=
1246                                 text->vadj->step_increment * 4;
1247                         text->vadj->value =
1248                                 MIN(text->vadj->value, upper);
1249                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1250                                                 "value_changed");
1251                 }
1252         } else {
1253                 if (text->vadj->value > 0.0) {
1254                         text->vadj->value -=
1255                                 text->vadj->step_increment * 4;
1256                         text->vadj->value =
1257                                 MAX(text->vadj->value, 0.0);
1258                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1259                                                 "value_changed");
1260                 }
1261         }
1262 }
1263
1264 gboolean textview_scroll_page(TextView *textview, gboolean up)
1265 {
1266         GtkText *text = GTK_TEXT(textview->text);
1267         gfloat upper;
1268         gfloat page_incr;
1269
1270         if (prefs_common.enable_smooth_scroll)
1271                 return textview_smooth_scroll_page(textview, up);
1272
1273         if (prefs_common.scroll_halfpage)
1274                 page_incr = text->vadj->page_increment / 2;
1275         else
1276                 page_incr = text->vadj->page_increment;
1277
1278         if (!up) {
1279                 upper = text->vadj->upper - text->vadj->page_size;
1280                 if (text->vadj->value < upper) {
1281                         text->vadj->value += page_incr;
1282                         text->vadj->value = MIN(text->vadj->value, upper);
1283                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1284                                                 "value_changed");
1285                 } else
1286                         return FALSE;
1287         } else {
1288                 if (text->vadj->value > 0.0) {
1289                         text->vadj->value -= page_incr;
1290                         text->vadj->value = MAX(text->vadj->value, 0.0);
1291                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1292                                                 "value_changed");
1293                 } else
1294                         return FALSE;
1295         }
1296
1297         return TRUE;
1298 }
1299
1300 static void textview_smooth_scroll_do(TextView *textview,
1301                                       gfloat old_value, gfloat last_value,
1302                                       gint step)
1303 {
1304         GtkText *text = GTK_TEXT(textview->text);
1305         gint change_value;
1306         gboolean up;
1307         gint i;
1308
1309         if (old_value < last_value) {
1310                 change_value = last_value - old_value;
1311                 up = FALSE;
1312         } else {
1313                 change_value = old_value - last_value;
1314                 up = TRUE;
1315         }
1316
1317         gdk_key_repeat_disable();
1318
1319         for (i = step; i <= change_value; i += step) {
1320                 text->vadj->value = old_value + (up ? -i : i);
1321                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1322                                         "value_changed");
1323         }
1324
1325         text->vadj->value = last_value;
1326         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1327
1328         gdk_key_repeat_restore();
1329 }
1330
1331 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1332 {
1333         GtkText *text = GTK_TEXT(textview->text);
1334         gfloat upper;
1335         gfloat old_value;
1336         gfloat last_value;
1337
1338         if (!up) {
1339                 upper = text->vadj->upper - text->vadj->page_size;
1340                 if (text->vadj->value < upper) {
1341                         old_value = text->vadj->value;
1342                         last_value = text->vadj->value +
1343                                 text->vadj->step_increment * 4;
1344                         last_value = MIN(last_value, upper);
1345
1346                         textview_smooth_scroll_do(textview, old_value,
1347                                                   last_value,
1348                                                   prefs_common.scroll_step);
1349                 }
1350         } else {
1351                 if (text->vadj->value > 0.0) {
1352                         old_value = text->vadj->value;
1353                         last_value = text->vadj->value -
1354                                 text->vadj->step_increment * 4;
1355                         last_value = MAX(last_value, 0.0);
1356
1357                         textview_smooth_scroll_do(textview, old_value,
1358                                                   last_value,
1359                                                   prefs_common.scroll_step);
1360                 }
1361         }
1362 }
1363
1364 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1365 {
1366         GtkText *text = GTK_TEXT(textview->text);
1367         gfloat upper;
1368         gfloat page_incr;
1369         gfloat old_value;
1370         gfloat last_value;
1371
1372         if (prefs_common.scroll_halfpage)
1373                 page_incr = text->vadj->page_increment / 2;
1374         else
1375                 page_incr = text->vadj->page_increment;
1376
1377         if (!up) {
1378                 upper = text->vadj->upper - text->vadj->page_size;
1379                 if (text->vadj->value < upper) {
1380                         old_value = text->vadj->value;
1381                         last_value = text->vadj->value + page_incr;
1382                         last_value = MIN(last_value, upper);
1383
1384                         textview_smooth_scroll_do(textview, old_value,
1385                                                   last_value,
1386                                                   prefs_common.scroll_step);
1387                 } else
1388                         return FALSE;
1389         } else {
1390                 if (text->vadj->value > 0.0) {
1391                         old_value = text->vadj->value;
1392                         last_value = text->vadj->value - page_incr;
1393                         last_value = MAX(last_value, 0.0);
1394
1395                         textview_smooth_scroll_do(textview, old_value,
1396                                                   last_value,
1397                                                   prefs_common.scroll_step);
1398                 } else
1399                         return FALSE;
1400         }
1401
1402         return TRUE;
1403 }
1404
1405 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1406                                  TextView *textview)
1407 {
1408         SummaryView *summaryview = NULL;
1409
1410         if (!event) return;
1411         if (textview->messageview->mainwin)
1412                 summaryview = textview->messageview->mainwin->summaryview;
1413
1414         switch (event->keyval) {
1415         case GDK_Tab:
1416         case GDK_Home:
1417         case GDK_Left:
1418         case GDK_Up:
1419         case GDK_Right:
1420         case GDK_Down:
1421         case GDK_Page_Up:
1422         case GDK_Page_Down:
1423         case GDK_End:
1424         case GDK_Control_L:
1425         case GDK_Control_R:
1426                 break;
1427         case GDK_space:
1428                 if (summaryview)
1429                         summary_pass_key_press_event(summaryview, event);
1430                 else
1431                         textview_scroll_page(textview, FALSE);
1432                 break;
1433         case GDK_BackSpace:
1434                 textview_scroll_page(textview, TRUE);
1435                 break;
1436         case GDK_Return:
1437                 textview_scroll_one_line(textview,
1438                                          (event->state & GDK_MOD1_MASK) != 0);
1439                 break;
1440         default:
1441                 if (summaryview)
1442                         summary_pass_key_press_event(summaryview, event);
1443                 break;
1444         }
1445 }
1446
1447 static gint textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1448                                     TextView *textview)
1449 {
1450         if (event)
1451                 textview->last_buttonpress = event->type;
1452         return FALSE;
1453 }
1454
1455 static gint textview_button_released(GtkWidget *widget, GdkEventButton *event,
1456                                     TextView *textview)
1457 {
1458         textview->cur_pos =
1459                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1460
1461         if (event &&
1462             ((event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS)
1463              || event->button == 2 || event->button == 3)) {
1464                 GSList *cur;
1465
1466                 /* double click seems to set the cursor after the current
1467                  * word. The cursor position needs fixing, otherwise the
1468                  * last word of a clickable zone will not work */
1469                 if (event->button == 1 && textview->last_buttonpress == GDK_2BUTTON_PRESS) {
1470                         textview->cur_pos--;
1471                 }
1472
1473                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1474                         RemoteURI *uri = (RemoteURI *)cur->data;
1475
1476                         if (textview->cur_pos >= uri->start &&
1477                             textview->cur_pos <  uri->end) {
1478                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1479                                         if (event->button == 3) {
1480                                                 gchar *fromname, *fromaddress;
1481                                                 GdkEventButton tmpev;
1482
1483                                                 /* extract url */
1484                                                 fromaddress = g_strdup(uri->uri + 7);
1485                                                 /* Hiroyuki: please put this function in utils.c! */
1486                                                 fromname = procheader_get_fromname(fromaddress);
1487                                                 extract_address(fromaddress);
1488                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1489                                                 /* Add to address book - Match */
1490                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1491
1492                                                 g_free(fromaddress);
1493                                                 g_free(fromname);
1494                                         } else {
1495                                                 compose_new_with_recipient
1496                                                         (NULL, uri->uri + 7);
1497                                         }
1498                                 } else {
1499                                         open_uri(uri->uri,
1500                                                  prefs_common.uri_cmd);
1501                                 }
1502                         }
1503                 }
1504         }
1505         if (event)
1506                 textview->last_buttonpress = event->type;
1507         return FALSE;
1508 }
1509
1510 static void textview_uri_list_remove_all(GSList *uri_list)
1511 {
1512         GSList *cur;
1513
1514         for (cur = uri_list; cur != NULL; cur = cur->next) {
1515                 if (cur->data) {
1516                         g_free(((RemoteURI *)cur->data)->uri);
1517                         g_free(cur->data);
1518                 }
1519         }
1520
1521         g_slist_free(uri_list);
1522 }