src/textview.c

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