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
 301                         if ((fpos = ftell(fp)) < 0)
 302                                 perror("ftell");
 303                         else if (fseek(fp, mimeinfo->parent->fpos, SEEK_SET)
 304                                  < 0)
 305                                 perror("fseek");
 306                         else {
 307                                 headers = textview_scan_header(textview, fp);
 308                                 if (fseek(fp, fpos, SEEK_SET) < 0)
 309                                         perror("fseek");
 310                         }
 311                 }
 312                 while (fgets(buf, sizeof(buf), fp) != NULL)
 313                         if (buf[0] == '\r' || buf[0] == '\n') break;
 314         }
 315
 316         /* display attached RFC822 single text message */
 317         if (mimeinfo->parent && mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 318                 if (headers) procheader_header_array_destroy(headers);
 319                 if (!mimeinfo->sub || mimeinfo->sub->children) return;
 320                 headers = textview_scan_header(textview, fp);
 321                 mimeinfo = mimeinfo->sub;
 322         } else if (!mimeinfo->parent &&
 323                    mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 324                 if (headers) procheader_header_array_destroy(headers);
 325                 if (!mimeinfo->sub) return;
 326                 headers = textview_scan_header(textview, fp);
 327                 mimeinfo = mimeinfo->sub;
 328         }
 329
 330         if (prefs_common.force_charset)
 331                 charset = prefs_common.force_charset;
 332         else if (mimeinfo->charset)
 333                 charset = mimeinfo->charset;
 334         textview_set_font(textview, charset);
 335
 336         conv = conv_code_converter_new(charset);
 337
 338         textview_clear(textview);
 339         text = GTK_TEXT(textview->text);
 340         gtk_text_freeze(text);
 341
 342         textview->body_pos = 0;
 343         textview->cur_pos  = 0;
 344
 345         if (headers) {
 346                 textview_show_header(textview, headers);
 347                 procheader_header_array_destroy(headers);
 348         }
 349
 350         tmpfp = procmime_decode_content(NULL, fp, mimeinfo);
 351         if (tmpfp) {
 352                 if (mimeinfo->mime_type == MIME_TEXT_HTML)
 353                         textview_show_html(textview, tmpfp, conv);
 354                 else
 355                         while (fgets(buf, sizeof(buf), tmpfp) != NULL)
 356                                 textview_write_line(textview, buf, conv);
 357                 fclose(tmpfp);
 358         }
 359
 360         conv_code_converter_destroy(conv);
 361
 362         gtk_text_thaw(text);
 363 }
 364
 365 #define TEXT_INSERT(str) \
 366         gtk_text_insert(text, textview->msgfont, NULL, NULL, str, -1)
 367
 368 void textview_show_mime_part(TextView *textview, MimeInfo *partinfo)
 369 {
 370         GtkText *text;
 371
 372         if (!partinfo) return;
 373
 374         textview_set_font(textview, NULL);
 375         text = GTK_TEXT(textview->text);
 376         textview_clear(textview);
 377
 378         gtk_text_freeze(text);
 379
 380         TEXT_INSERT(_("To save this part, pop up the context menu with "));
 381         TEXT_INSERT(_("right click and select `Save as...', "));
 382         TEXT_INSERT(_("or press `y' key.\n\n"));
 383
 384         TEXT_INSERT(_("To display this part as a text message, select "));
 385         TEXT_INSERT(_("`Display as text', or press `t' key.\n\n"));
 386
 387         TEXT_INSERT(_("To open this part with external program, select "));
 388         TEXT_INSERT(_("`Open' or `Open with...', "));
 389         TEXT_INSERT(_("or double-click, or click the center button, "));
 390         TEXT_INSERT(_("or press `l' key."));
 391
 392         gtk_text_thaw(text);
 393 }
 394
 395 #if USE_GPGME
 396 void textview_show_signature_part(TextView *textview, MimeInfo *partinfo)
 397 {
 398         GtkText *text;
 399
 400         if (!partinfo) return;
 401
 402         textview_set_font(textview, NULL);
 403         text = GTK_TEXT(textview->text);
 404         textview_clear(textview);
 405
 406         gtk_text_freeze(text);
 407
 408         if (partinfo->sigstatus_full == NULL) {
 409                 TEXT_INSERT(_("This signature has not been checked yet.\n"));
 410                 TEXT_INSERT(_("To check it, pop up the context menu with\n"));
 411                 TEXT_INSERT(_("right click and select `Check signature'.\n"));
 412         } else {
 413                 TEXT_INSERT(partinfo->sigstatus_full);
 414         }
 415
 416         gtk_text_thaw(text);
 417 }
 418 #endif /* USE_GPGME */
 419
 420 #undef TEXT_INSERT
 421
 422 static void textview_show_html(TextView *textview, FILE *fp,
 423                                CodeConverter *conv)
 424 {
 425         HTMLParser *parser;
 426         gchar *str;
 427         gchar* url = NULL;
 428
 429         parser = html_parser_new(fp, conv);
 430         g_return_if_fail(parser != NULL);
 431
 432         while ((str = html_parse(parser)) != NULL) {
 433                 if (parser->state == HTML_HREF) {
 434                         /* first time : get and copy the URL */
 435                         if (url == NULL) {
 436                                 url = strdup(strtok(str, " "));
 437                                 /* the URL may (or not) be followed by the
 438                                  * referenced text */
 439                                 str = strtok(NULL, "");
 440                         }
 441                         if (str != NULL) {
 442                                 textview_write_link(textview, url, str, NULL);
 443                         }
 444                 } else {
 445                         if (url != NULL) {
 446                                 free(url);
 447                                 url = NULL;
 448                         }
 449                         textview_write_line(textview, str, NULL);
 450                 }
 451         }
 452         html_parser_destroy(parser);
 453 }
 454
 455 /* get_uri_part() - retrieves a URI starting from scanpos.
 456                     Returns TRUE if succesful */
 457 static gboolean get_uri_part(const gchar *start, const gchar *scanpos,
 458                              const gchar **bp, const gchar **ep)
 459 {
 460         const gchar *ep_;
 461
 462         g_return_val_if_fail(start != NULL, FALSE);
 463         g_return_val_if_fail(scanpos != NULL, FALSE);
 464         g_return_val_if_fail(bp != NULL, FALSE);
 465         g_return_val_if_fail(ep != NULL, FALSE);
 466
 467         *bp = scanpos;
 468
 469         /* find end point of URI */
 470         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
 471                 if (!isgraph(*ep_) || !isascii(*ep_) || strchr("()<>\"", *ep_))
 472                         break;
 473         }
 474
 475         /* no punctuation at end of string */
 476
 477         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
 478          * should pass some URI type to this function and decide on that whether
 479          * to perform punctuation stripping */
 480
 481 #define IS_REAL_PUNCT(ch) \
 482         (ispunct(ch) && ((ch) != '/'))
 483
 484         for (; ep_ - 1 > scanpos + 1 && IS_REAL_PUNCT(*(ep_ - 1)); ep_--)
 485                 ;
 486
 487 #undef IS_REAL_PUNCT
 488
 489         *ep = ep_;
 490
 491         return TRUE;
 492 }
 493
 494 static gchar *make_uri_string(const gchar *bp, const gchar *ep)
 495 {
 496         return g_strndup(bp, ep - bp);
 497 }
 498
 499 /* valid mail address characters */
 500 #define IS_RFC822_CHAR(ch) \
 501         (isascii(ch) && \
 502          (ch) > 32   && \
 503          (ch) != 127 && \
 504          !isspace(ch) && \
 505          !strchr("()<>\"", (ch)))
 506
 507 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
 508
 509 /* get_email_part() - retrieves an email address. Returns TRUE if succesful */
 510 static gboolean get_email_part(const gchar *start, const gchar *scanpos,
 511                                const gchar **bp, const gchar **ep)
 512 {
 513         /* more complex than the uri part because we need to scan back and forward starting from
 514          * the scan position. */
 515         gboolean result = FALSE;
 516         const gchar *bp_ = NULL;
 517         const gchar *ep_ = NULL;
 518
 519         /* the informative part of the email address (describing the name
 520          * of the email address owner) may contain quoted parts. the
 521          * closure stack stores the last encountered quotes. */
 522         gchar closure_stack[128];
 523         gchar *ptr = closure_stack;
 524
 525         g_return_val_if_fail(start != NULL, FALSE);
 526         g_return_val_if_fail(scanpos != NULL, FALSE);
 527         g_return_val_if_fail(bp != NULL, FALSE);
 528         g_return_val_if_fail(ep != NULL, FALSE);
 529
 530         /* scan start of address */
 531         for (bp_ = scanpos - 1; bp_ >= start && IS_RFC822_CHAR(*bp_); bp_--)
 532                 ;
 533
 534         /* TODO: should start with an alnum? */
 535         bp_++;
 536         for (; bp_ < scanpos && !isalnum(*bp_); bp_++)
 537                 ;
 538
 539         if (bp_ != scanpos) {
 540                 /* scan end of address */
 541                 for (ep_ = scanpos + 1; *ep_ && IS_RFC822_CHAR(*ep_); ep_++)
 542                         ;
 543
 544                 /* TODO: really should terminate with an alnum? */
 545                 for (; ep_ > scanpos  && !isalnum(*ep_); --ep_)
 546                         ;
 547                 ep_++;
 548
 549                 if (ep_ > scanpos + 1) {
 550                         *ep = ep_;
 551                         *bp = bp_;
 552                         result = TRUE;
 553                 }
 554         }
 555
 556         if (!result) return FALSE;
 557
 558         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
 559         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
 560                 return FALSE;
 561
 562         /* see if this is <bracketed>; in this case we also scan for the informative part. */
 563         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
 564                 return TRUE;
 565
 566 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
 567 #define IN_STACK()      (ptr > closure_stack)
 568 /* has underrun check */
 569 #define POP_STACK()     if(IN_STACK()) --ptr
 570 /* has overrun check */
 571 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
 572 /* has underrun check */
 573 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
 574
 575         ep_++;
 576
 577         /* scan for the informative part. */
 578         for (bp_ -= 2; bp_ >= start; bp_--) {
 579                 /* if closure on the stack keep scanning */
 580                 if (PEEK_STACK() == *bp_) {
 581                         POP_STACK();
 582                         continue;
 583                 }
 584                 if (*bp_ == '\'' || *bp_ == '"') {
 585                         PUSH_STACK(*bp_);
 586                         continue;
 587                 }
 588
 589                 /* if nothing in the closure stack, do the special conditions
 590                  * the following if..else expression simply checks whether
 591                  * a token is acceptable. if not acceptable, the clause
 592                  * should terminate the loop with a 'break' */
 593                 if (!PEEK_STACK()) {
 594                         if (*bp_ == '-'
 595                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
 596                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
 597                                 /* hyphens are allowed, but only in
 598                                    between alnums */
 599                         } else if (!ispunct(*bp_)) {
 600                                 /* but anything not being a punctiation
 601                                    is ok */
 602                         } else {
 603                                 break; /* anything else is rejected */
 604                         }
 605                 }
 606         }
 607
 608         bp_++;
 609
 610 #undef PEEK_STACK
 611 #undef PUSH_STACK
 612 #undef POP_STACK
 613 #undef IN_STACK
 614 #undef FULL_STACK
 615
 616         /* scan forward (should start with an alnum) */
 617         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
 618                 ;
 619
 620         *ep = ep_;
 621         *bp = bp_;
 622
 623         return result;
 624 }
 625
 626 #undef IS_QUOTE
 627 #undef IS_RFC822_CHAR
 628
 629 static gchar *make_email_string(const gchar *bp, const gchar *ep)
 630 {
 631         /* returns a mailto: URI; mailto: is also used to detect the
 632          * uri type later on in the button_pressed signal handler */
 633         gchar *tmp;
 634         gchar *result;
 635
 636         tmp = g_strndup(bp, ep - bp);
 637         result = g_strconcat("mailto:", tmp, NULL);
 638         g_free(tmp);
 639
 640         return result;
 641 }
 642
 643 #define ADD_TXT_POS(bp_, ep_, pti_) \
 644         if ((last->next = alloca(sizeof(struct txtpos))) != NULL) { \
 645                 last = last->next; \
 646                 last->bp = (bp_); last->ep = (ep_); last->pti = (pti_); \
 647                 last->next = NULL; \
 648         } else { \
 649                 g_warning("alloc error scanning URIs\n"); \
 650                 gtk_text_insert(text, textview->msgfont, fg_color, NULL, \
 651                                 linebuf, -1); \
 652                 return; \
 653         }
 654
 655 /* textview_make_clickable_parts() - colorizes clickable parts */
 656 static void textview_make_clickable_parts(TextView *textview,
 657                                           GdkFont *font,
 658                                           GdkColor *fg_color,
 659                                           GdkColor *uri_color,
 660                                           const gchar *linebuf)
 661 {
 662         /* parse table - in order of priority */
 663         struct table {
 664                 const gchar *needle; /* token */
 665
 666                 /* token search function */
 667                 gchar    *(*search)     (const gchar *haystack,
 668                                          const gchar *needle);
 669                 /* part parsing function */
 670                 gboolean  (*parse)      (const gchar *start,
 671                                          const gchar *scanpos,
 672                                          const gchar **bp_,
 673                                          const gchar **ep_);
 674                 /* part to URI function */
 675                 gchar    *(*build_uri)  (const gchar *bp,
 676                                          const gchar *ep);
 677         };
 678
 679         static struct table parser[] = {
 680                 {"http://",  strcasestr, get_uri_part,   make_uri_string},
 681                 {"https://", strcasestr, get_uri_part,   make_uri_string},
 682                 {"ftp://",   strcasestr, get_uri_part,   make_uri_string},
 683                 {"mailto:",  strcasestr, get_uri_part,   make_uri_string},
 684                 {"@",        strcasestr, get_email_part, make_email_string}
 685         };
 686         const gint PARSE_ELEMS = sizeof parser / sizeof parser[0];
 687
 688         gint  n;
 689         const gchar *walk, *bp, *ep;
 690
 691         struct txtpos {
 692                 const gchar     *bp, *ep;       /* text position */
 693                 gint             pti;           /* index in parse table */
 694                 struct txtpos   *next;          /* next */
 695         } head = {NULL, NULL, 0,  NULL}, *last = &head;
 696
 697         GtkText *text = GTK_TEXT(textview->text);
 698
 699         /* parse for clickable parts, and build a list of begin and end positions  */
 700         for (walk = linebuf, n = 0;;) {
 701                 gint last_index = PARSE_ELEMS;
 702                 gchar *scanpos = NULL;
 703
 704                 /* FIXME: this looks phony. scanning for anything in the parse table */
 705                 for (n = 0; n < PARSE_ELEMS; n++) {
 706                         gchar *tmp;
 707
 708                         tmp = parser[n].search(walk, parser[n].needle);
 709                         if (tmp) {
 710                                 if (scanpos == NULL || tmp < scanpos) {
 711                                         scanpos = tmp;
 712                                         last_index = n;
 713                                 }
 714                         }
 715                 }
 716
 717                 if (scanpos) {
 718                         /* check if URI can be parsed */
 719                         if (parser[last_index].parse(linebuf, scanpos, &bp, &ep)
 720                             && (size_t) (ep - bp - 1) > strlen(parser[last_index].needle)) {
 721                                         ADD_TXT_POS(bp, ep, last_index);
 722                                         walk = ep;
 723                         } else
 724                                 walk = scanpos +
 725                                         strlen(parser[last_index].needle);
 726                 } else
 727                         break;
 728         }
 729
 730         /* colorize this line */
 731         if (head.next) {
 732                 const gchar *normal_text = linebuf;
 733
 734                 /* insert URIs */
 735                 for (last = head.next; last != NULL;
 736                      normal_text = last->ep, last = last->next) {
 737                         RemoteURI *uri;
 738
 739                         uri = g_new(RemoteURI, 1);
 740                         if (last->bp - normal_text > 0)
 741                                 gtk_text_insert(text, font,
 742                                                 fg_color, NULL,
 743                                                 normal_text,
 744                                                 last->bp - normal_text);
 745                         uri->uri = parser[last->pti].build_uri(last->bp,
 746                                                                last->ep);
 747                         uri->start = gtk_text_get_point(text);
 748                         gtk_text_insert(text, font, uri_color,
 749                                         NULL, last->bp, last->ep - last->bp);
 750                         uri->end = gtk_text_get_point(text);
 751                         textview->uri_list =
 752                                 g_slist_append(textview->uri_list, uri);
 753                 }
 754
 755                 if (*normal_text)
 756                         gtk_text_insert(text, font, fg_color,
 757                                         NULL, normal_text, -1);
 758         } else
 759                 gtk_text_insert(text, font, fg_color, NULL, linebuf, -1);
 760 }
 761
 762 #undef ADD_TXT_POS
 763
 764 /* This function writes str as a double-clickable link with the given url. */
 765 static void textview_write_link(TextView *textview, const gchar *url,
 766                                 const gchar *str, CodeConverter *conv)
 767 {
 768     GdkColor *link_color = NULL;
 769     RemoteURI* uri;
 770     GtkText *text = GTK_TEXT(textview->text);
 771     gchar buf[BUFFSIZE];
 772
 773     /* this part is taken from textview_write_line. Right now the only place
 774      * that calls this function passes NULL for conv, but you never know. */
 775     if (!conv)
 776             strncpy2(buf, str, sizeof(buf));
 777     else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 778             gtk_text_insert(text, textview->msgfont,
 779                             prefs_common.enable_color
 780                             ? &error_color : NULL, NULL,
 781                             "*** Warning: code conversion failed ***\n",
 782                             -1);
 783             return;
 784     }
 785
 786     /* this part is based on the code in make_clickable_parts */
 787     if (prefs_common.enable_color) {
 788         link_color = &uri_color;
 789     }
 790     uri = g_new(RemoteURI, 1);
 791     uri->uri = g_strdup(url);
 792     uri->start = gtk_text_get_point(text);
 793     gtk_text_insert(text, textview->msgfont, link_color, NULL, buf,
 794                     strlen(buf));
 795     uri->end = gtk_text_get_point(text);
 796     textview->uri_list = g_slist_append(textview->uri_list, uri);
 797 }
 798
 799 static void textview_write_line(TextView *textview, const gchar *str,
 800                                 CodeConverter *conv)
 801 {
 802         GtkText *text = GTK_TEXT(textview->text);
 803         gchar buf[BUFFSIZE];
 804         size_t len;
 805         GdkColor *fg_color;
 806         gint quotelevel = -1;
 807
 808         if (!conv)
 809                 strncpy2(buf, str, sizeof(buf));
 810         else if (conv_convert(conv, buf, sizeof(buf), str) < 0) {
 811                 gtk_text_insert(text, textview->msgfont,
 812                                 prefs_common.enable_color
 813                                 ? &error_color : NULL, NULL,
 814                                 "*** Warning: code conversion failed ***\n",
 815                                 -1);
 816                 return;
 817         }
 818
 819         len = strlen(buf);
 820         if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 821                 buf[len - 2] = '\n';
 822                 buf[len - 1] = '\0';
 823         }
 824         if (prefs_common.conv_mb_alnum) conv_mb_alnum(buf);
 825         fg_color = NULL;
 826
 827         /* change color of quotation
 828            >, foo>, _> ... ok, <foo>, foo bar>, foo-> ... ng
 829            Up to 3 levels of quotations are detected, and each
 830            level is colored using a different color. */
 831         if (prefs_common.enable_color && strchr(buf, '>')) {
 832                 quotelevel = get_quote_level(buf);
 833
 834                 /* set up the correct foreground color */
 835                 if (quotelevel > 2) {
 836                         /* recycle colors */
 837                         if (prefs_common.recycle_quote_colors)
 838                                 quotelevel %= 3;
 839                         else
 840                                 quotelevel = 2;
 841                 }
 842         }
 843
 844         if (quotelevel == -1)
 845                 fg_color = NULL;
 846         else
 847                 fg_color = &quote_colors[quotelevel];
 848
 849         if (prefs_common.head_space && spacingfont && buf[0] != '\n')
 850                 gtk_text_insert(text, spacingfont, NULL, NULL, " ", 1);
 851
 852         if (prefs_common.enable_color)
 853                 textview_make_clickable_parts(textview, textview->msgfont,
 854                                               fg_color, &uri_color, buf);
 855         else
 856                 textview_make_clickable_parts(textview, textview->msgfont,
 857                                               fg_color, NULL, buf);
 858 }
 859
 860 void textview_clear(TextView *textview)
 861 {
 862         GtkText *text = GTK_TEXT(textview->text);
 863
 864         gtk_text_freeze(text);
 865         gtk_text_set_point(text, 0);
 866         gtk_text_forward_delete(text, gtk_text_get_length(text));
 867         gtk_text_thaw(text);
 868
 869         textview_uri_list_remove_all(textview->uri_list);
 870         textview->uri_list = NULL;
 871 }
 872
 873 void textview_destroy(TextView *textview)
 874 {
 875         textview_uri_list_remove_all(textview->uri_list);
 876         textview->uri_list = NULL;
 877
 878         if (!textview->scrolledwin_sb->parent)
 879                 gtk_widget_destroy(textview->scrolledwin_sb);
 880         if (!textview->scrolledwin_mb->parent)
 881                 gtk_widget_destroy(textview->scrolledwin_mb);
 882
 883         if (textview->msgfont) {
 884                 textview->msgfont->ascent = textview->prev_ascent;
 885                 textview->msgfont->descent = textview->prev_descent;
 886                 gdk_font_unref(textview->msgfont);
 887         }
 888         if (textview->boldfont)
 889                 gdk_font_unref(textview->boldfont);
 890
 891         g_free(textview);
 892 }
 893
 894 void textview_set_font(TextView *textview, const gchar *codeset)
 895 {
 896         gboolean use_fontset = TRUE;
 897
 898         /* In multi-byte mode, GtkText can't display 8bit characters
 899            correctly, so it must be single-byte mode. */
 900         if (MB_CUR_MAX > 1) {
 901                 if (codeset) {
 902                         if (!g_strncasecmp(codeset, "ISO-8859-", 9) ||
 903                             !g_strcasecmp(codeset, "BALTIC"))
 904                                 use_fontset = FALSE;
 905                         else if (conv_get_current_charset() != C_EUC_JP &&
 906                                  (!g_strncasecmp(codeset, "KOI8-", 5) ||
 907                                   !g_strncasecmp(codeset, "CP", 2)    ||
 908                                   !g_strncasecmp(codeset, "WINDOWS-", 8)))
 909                                 use_fontset = FALSE;
 910                 }
 911         } else
 912                 use_fontset = FALSE;
 913
 914         if (textview->text_is_mb && !use_fontset) {
 915                 GtkWidget *parent;
 916
 917                 parent = textview->scrolledwin_mb->parent;
 918                 gtk_editable_select_region
 919                         (GTK_EDITABLE(textview->text_mb), 0, 0);
 920                 gtk_container_remove(GTK_CONTAINER(parent),
 921                                      textview->scrolledwin_mb);
 922                 gtk_container_add(GTK_CONTAINER(parent),
 923                                   textview->scrolledwin_sb);
 924
 925                 textview->text = textview->text_sb;
 926                 textview->text_is_mb = FALSE;
 927         } else if (!textview->text_is_mb && use_fontset) {
 928                 GtkWidget *parent;
 929
 930                 parent = textview->scrolledwin_sb->parent;
 931                 gtk_editable_select_region
 932                         (GTK_EDITABLE(textview->text_sb), 0, 0);
 933                 gtk_container_remove(GTK_CONTAINER(parent),
 934                                      textview->scrolledwin_sb);
 935                 gtk_container_add(GTK_CONTAINER(parent),
 936                                   textview->scrolledwin_mb);
 937
 938                 textview->text = textview->text_mb;
 939                 textview->text_is_mb = TRUE;
 940         }
 941
 942         if (prefs_common.textfont) {
 943                 if (textview->msgfont) {
 944                         textview->msgfont->ascent = textview->prev_ascent;
 945                         textview->msgfont->descent = textview->prev_descent;
 946                         gdk_font_unref(textview->msgfont);
 947                         textview->msgfont = NULL;
 948                 }
 949                 if (use_fontset)
 950                         textview->msgfont =
 951                                 gdk_fontset_load(prefs_common.textfont);
 952                 else {
 953                         if (MB_CUR_MAX > 1) {
 954                                 FONT_LOAD(textview->msgfont,
 955                                           "-*-courier-medium-r-normal--14-*-*-*-*-*-iso8859-1");
 956                         } else {
 957                                 FONT_LOAD(textview->msgfont,
 958                                           prefs_common.textfont);
 959                         }
 960                 }
 961
 962                 if (textview->msgfont) {
 963                         gint ascent, descent;
 964
 965                         textview->prev_ascent = textview->msgfont->ascent;
 966                         textview->prev_descent = textview->msgfont->descent;
 967                         descent = prefs_common.line_space / 2;
 968                         ascent  = prefs_common.line_space - descent;
 969                         textview->msgfont->ascent  += ascent;
 970                         textview->msgfont->descent += descent;
 971                 }
 972         }
 973
 974         if (!textview->boldfont)
 975                 FONT_LOAD(textview->boldfont, BOLD_FONT);
 976         if (!spacingfont)
 977                 spacingfont = gdk_font_load("-*-*-medium-r-normal--6-*");
 978 }
 979
 980 enum
 981 {
 982         H_DATE          = 0,
 983         H_FROM          = 1,
 984         H_TO            = 2,
 985         H_NEWSGROUPS    = 3,
 986         H_SUBJECT       = 4,
 987         H_CC            = 5,
 988         H_REPLY_TO      = 6,
 989         H_FOLLOWUP_TO   = 7,
 990         H_X_MAILER      = 8,
 991         H_X_NEWSREADER  = 9,
 992         H_USER_AGENT    = 10,
 993         H_ORGANIZATION  = 11,
 994 };
 995
 996 void textview_set_position(TextView *textview, gint pos)
 997 {
 998         if (pos < 0) {
 999                 textview->cur_pos =
1000                         gtk_text_get_length(GTK_TEXT(textview->text));
1001         } else {
1002                 textview->cur_pos = pos;
1003         }
1004 }
1005
1006 static GPtrArray *textview_scan_header(TextView *textview, FILE *fp)
1007 {
1008         gchar buf[BUFFSIZE];
1009         GPtrArray *headers, *sorted_headers;
1010         GSList *disphdr_list;
1011         Header *header;
1012         gint i;
1013
1014         g_return_val_if_fail(fp != NULL, NULL);
1015
1016         if (!prefs_common.display_header) {
1017                 while (fgets(buf, sizeof(buf), fp) != NULL)
1018                         if (buf[0] == '\r' || buf[0] == '\n') break;
1019                 return NULL;
1020         }
1021
1022         headers = procheader_get_header_array_asis(fp);
1023
1024         sorted_headers = g_ptr_array_new();
1025
1026         for (disphdr_list = prefs_common.disphdr_list; disphdr_list != NULL;
1027              disphdr_list = disphdr_list->next) {
1028                 DisplayHeaderProp *dp =
1029                         (DisplayHeaderProp *)disphdr_list->data;
1030
1031                 for (i = 0; i < headers->len; i++) {
1032                         header = g_ptr_array_index(headers, i);
1033
1034                         if (procheader_headername_equal(header->name,
1035                                                         dp->name)) {
1036                                 if (dp->hidden)
1037                                         procheader_header_free(header);
1038                                 else
1039                                         g_ptr_array_add(sorted_headers, header);
1040
1041                                 g_ptr_array_remove_index(headers, i);
1042                                 i--;
1043                         }
1044                 }
1045         }
1046
1047         if (prefs_common.show_other_header) {
1048                 for (i = 0; i < headers->len; i++) {
1049                         header = g_ptr_array_index(headers, i);
1050                         g_ptr_array_add(sorted_headers, header);
1051                 }
1052         }
1053
1054         g_ptr_array_free(headers, FALSE);
1055
1056         return sorted_headers;
1057 }
1058
1059 static void textview_show_header(TextView *textview, GPtrArray *headers)
1060 {
1061         GtkText *text = GTK_TEXT(textview->text);
1062         Header *header;
1063         gint i;
1064
1065         g_return_if_fail(headers != NULL);
1066
1067         gtk_text_freeze(text);
1068
1069         for (i = 0; i < headers->len; i++) {
1070                 header = g_ptr_array_index(headers, i);
1071                 g_return_if_fail(header->name != NULL);
1072
1073                 gtk_text_insert(text, textview->boldfont, NULL, NULL,
1074                                 header->name, -1);
1075                 if (header->name[strlen(header->name) - 1] != ' ')
1076                         gtk_text_insert(text, textview->boldfont,
1077                                         NULL, NULL, " ", 1);
1078
1079                 if (procheader_headername_equal(header->name, "Subject") ||
1080                     procheader_headername_equal(header->name, "From")    ||
1081                     procheader_headername_equal(header->name, "To")      ||
1082                     procheader_headername_equal(header->name, "Cc"))
1083                         unfold_line(header->body);
1084
1085                 if (prefs_common.enable_color &&
1086                     (procheader_headername_equal(header->name, "X-Mailer") ||
1087                      procheader_headername_equal(header->name,
1088                                                  "X-Newsreader")) &&
1089                     strstr(header->body, "Sylpheed") != NULL)
1090                         gtk_text_insert(text, NULL, &emphasis_color, NULL,
1091                                         header->body, -1);
1092                 else if (prefs_common.enable_color) {
1093                         textview_make_clickable_parts(textview,
1094                                                       NULL, NULL, &uri_color,
1095                                                       header->body);
1096                 } else {
1097                         textview_make_clickable_parts(textview,
1098                                                       NULL, NULL, NULL,
1099                                                       header->body);
1100                 }
1101                 gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1102         }
1103
1104         gtk_text_insert(text, textview->msgfont, NULL, NULL, "\n", 1);
1105         gtk_text_thaw(text);
1106         textview->body_pos = gtk_text_get_length(text);
1107 }
1108
1109 gboolean textview_search_string(TextView *textview, const gchar *str,
1110                                 gboolean case_sens)
1111 {
1112         GtkText *text = GTK_TEXT(textview->text);
1113         gint pos;
1114         wchar_t *wcs;
1115         gint len;
1116         gint text_len;
1117         gboolean found = FALSE;
1118
1119         g_return_val_if_fail(str != NULL, FALSE);
1120
1121         wcs = strdup_mbstowcs(str);
1122         g_return_val_if_fail(wcs != NULL, FALSE);
1123         len = wcslen(wcs);
1124         pos = textview->cur_pos;
1125         if (pos < textview->body_pos)
1126                 pos = textview->body_pos;
1127         text_len = gtk_text_get_length(text);
1128         if (text_len - pos < len) {
1129                 g_free(wcs);
1130                 return FALSE;
1131         }
1132
1133         for (; pos < text_len; pos++) {
1134                 if (text_len - pos < len) break;
1135                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1136                     == TRUE) {
1137                         gtk_editable_set_position(GTK_EDITABLE(text),
1138                                                   pos + len);
1139                         gtk_editable_select_region(GTK_EDITABLE(text),
1140                                                    pos, pos + len);
1141                         textview_set_position(textview, pos + len);
1142                         found = TRUE;
1143                         break;
1144                 }
1145                 if (text_len - pos == len) break;
1146         }
1147
1148         g_free(wcs);
1149         return found;
1150 }
1151
1152 gboolean textview_search_string_backward(TextView *textview, const gchar *str,
1153                                          gboolean case_sens)
1154 {
1155         GtkText *text = GTK_TEXT(textview->text);
1156         gint pos;
1157         wchar_t *wcs;
1158         gint len;
1159         gint text_len;
1160         gboolean found = FALSE;
1161
1162         g_return_val_if_fail(str != NULL, FALSE);
1163
1164         wcs = strdup_mbstowcs(str);
1165         g_return_val_if_fail(wcs != NULL, FALSE);
1166         len = wcslen(wcs);
1167         pos = textview->cur_pos;
1168         text_len = gtk_text_get_length(text);
1169         if (text_len - textview->body_pos < len) {
1170                 g_free(wcs);
1171                 return FALSE;
1172         }
1173         if (pos <= textview->body_pos || text_len - pos < len)
1174                 pos = text_len - len;
1175
1176         for (; pos >= textview->body_pos; pos--) {
1177                 if (gtkut_text_match_string(text, pos, wcs, len, case_sens)
1178                     == TRUE) {
1179                         gtk_editable_set_position(GTK_EDITABLE(text), pos);
1180                         gtk_editable_select_region(GTK_EDITABLE(text),
1181                                                    pos, pos + len);
1182                         textview_set_position(textview, pos - 1);
1183                         found = TRUE;
1184                         break;
1185                 }
1186                 if (pos == textview->body_pos) break;
1187         }
1188
1189         g_free(wcs);
1190         return found;
1191 }
1192
1193 void textview_scroll_one_line(TextView *textview, gboolean up)
1194 {
1195         GtkText *text = GTK_TEXT(textview->text);
1196         gfloat upper;
1197
1198         if (prefs_common.enable_smooth_scroll) {
1199                 textview_smooth_scroll_one_line(textview, up);
1200                 return;
1201         }
1202
1203         if (!up) {
1204                 upper = text->vadj->upper - text->vadj->page_size;
1205                 if (text->vadj->value < upper) {
1206                         text->vadj->value +=
1207                                 text->vadj->step_increment * 4;
1208                         text->vadj->value =
1209                                 MIN(text->vadj->value, upper);
1210                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1211                                                 "value_changed");
1212                 }
1213         } else {
1214                 if (text->vadj->value > 0.0) {
1215                         text->vadj->value -=
1216                                 text->vadj->step_increment * 4;
1217                         text->vadj->value =
1218                                 MAX(text->vadj->value, 0.0);
1219                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1220                                                 "value_changed");
1221                 }
1222         }
1223 }
1224
1225 gboolean textview_scroll_page(TextView *textview, gboolean up)
1226 {
1227         GtkText *text = GTK_TEXT(textview->text);
1228         gfloat upper;
1229         gfloat page_incr;
1230
1231         if (prefs_common.enable_smooth_scroll)
1232                 return textview_smooth_scroll_page(textview, up);
1233
1234         if (prefs_common.scroll_halfpage)
1235                 page_incr = text->vadj->page_increment / 2;
1236         else
1237                 page_incr = text->vadj->page_increment;
1238
1239         if (!up) {
1240                 upper = text->vadj->upper - text->vadj->page_size;
1241                 if (text->vadj->value < upper) {
1242                         text->vadj->value += page_incr;
1243                         text->vadj->value = MIN(text->vadj->value, upper);
1244                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1245                                                 "value_changed");
1246                 } else
1247                         return FALSE;
1248         } else {
1249                 if (text->vadj->value > 0.0) {
1250                         text->vadj->value -= page_incr;
1251                         text->vadj->value = MAX(text->vadj->value, 0.0);
1252                         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1253                                                 "value_changed");
1254                 } else
1255                         return FALSE;
1256         }
1257
1258         return TRUE;
1259 }
1260
1261 static void textview_smooth_scroll_do(TextView *textview,
1262                                       gfloat old_value, gfloat last_value,
1263                                       gint step)
1264 {
1265         GtkText *text = GTK_TEXT(textview->text);
1266         gint change_value;
1267         gboolean up;
1268         gint i;
1269
1270         if (old_value < last_value) {
1271                 change_value = last_value - old_value;
1272                 up = FALSE;
1273         } else {
1274                 change_value = old_value - last_value;
1275                 up = TRUE;
1276         }
1277
1278         gdk_key_repeat_disable();
1279
1280         for (i = step; i <= change_value; i += step) {
1281                 text->vadj->value = old_value + (up ? -i : i);
1282                 gtk_signal_emit_by_name(GTK_OBJECT(text->vadj),
1283                                         "value_changed");
1284         }
1285
1286         text->vadj->value = last_value;
1287         gtk_signal_emit_by_name(GTK_OBJECT(text->vadj), "value_changed");
1288
1289         gdk_key_repeat_restore();
1290 }
1291
1292 static void textview_smooth_scroll_one_line(TextView *textview, gboolean up)
1293 {
1294         GtkText *text = GTK_TEXT(textview->text);
1295         gfloat upper;
1296         gfloat old_value;
1297         gfloat last_value;
1298
1299         if (!up) {
1300                 upper = text->vadj->upper - text->vadj->page_size;
1301                 if (text->vadj->value < upper) {
1302                         old_value = text->vadj->value;
1303                         last_value = text->vadj->value +
1304                                 text->vadj->step_increment * 4;
1305                         last_value = MIN(last_value, upper);
1306
1307                         textview_smooth_scroll_do(textview, old_value,
1308                                                   last_value,
1309                                                   prefs_common.scroll_step);
1310                 }
1311         } else {
1312                 if (text->vadj->value > 0.0) {
1313                         old_value = text->vadj->value;
1314                         last_value = text->vadj->value -
1315                                 text->vadj->step_increment * 4;
1316                         last_value = MAX(last_value, 0.0);
1317
1318                         textview_smooth_scroll_do(textview, old_value,
1319                                                   last_value,
1320                                                   prefs_common.scroll_step);
1321                 }
1322         }
1323 }
1324
1325 static gboolean textview_smooth_scroll_page(TextView *textview, gboolean up)
1326 {
1327         GtkText *text = GTK_TEXT(textview->text);
1328         gfloat upper;
1329         gfloat page_incr;
1330         gfloat old_value;
1331         gfloat last_value;
1332
1333         if (prefs_common.scroll_halfpage)
1334                 page_incr = text->vadj->page_increment / 2;
1335         else
1336                 page_incr = text->vadj->page_increment;
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 + page_incr;
1343                         last_value = MIN(last_value, upper);
1344
1345                         textview_smooth_scroll_do(textview, old_value,
1346                                                   last_value,
1347                                                   prefs_common.scroll_step);
1348                 } else
1349                         return FALSE;
1350         } else {
1351                 if (text->vadj->value > 0.0) {
1352                         old_value = text->vadj->value;
1353                         last_value = text->vadj->value - page_incr;
1354                         last_value = MAX(last_value, 0.0);
1355
1356                         textview_smooth_scroll_do(textview, old_value,
1357                                                   last_value,
1358                                                   prefs_common.scroll_step);
1359                 } else
1360                         return FALSE;
1361         }
1362
1363         return TRUE;
1364 }
1365
1366 static void textview_key_pressed(GtkWidget *widget, GdkEventKey *event,
1367                                  TextView *textview)
1368 {
1369         SummaryView *summaryview = NULL;
1370
1371         if (!event) return;
1372         if (textview->messageview->mainwin)
1373                 summaryview = textview->messageview->mainwin->summaryview;
1374
1375         switch (event->keyval) {
1376         case GDK_Tab:
1377         case GDK_Home:
1378         case GDK_Left:
1379         case GDK_Up:
1380         case GDK_Right:
1381         case GDK_Down:
1382         case GDK_Page_Up:
1383         case GDK_Page_Down:
1384         case GDK_End:
1385         case GDK_Control_L:
1386         case GDK_Control_R:
1387                 break;
1388         case GDK_space:
1389                 if (summaryview)
1390                         summary_pass_key_press_event(summaryview, event);
1391                 else
1392                         textview_scroll_page(textview, FALSE);
1393                 break;
1394         case GDK_BackSpace:
1395         case GDK_Delete:
1396                 textview_scroll_page(textview, TRUE);
1397                 break;
1398         case GDK_Return:
1399                 textview_scroll_one_line(textview,
1400                                          (event->state & GDK_MOD1_MASK) != 0);
1401                 break;
1402         default:
1403                 if (summaryview)
1404                         summary_pass_key_press_event(summaryview, event);
1405                 break;
1406         }
1407 }
1408
1409 static void textview_button_pressed(GtkWidget *widget, GdkEventButton *event,
1410                                     TextView *textview)
1411 {
1412         textview->cur_pos =
1413                 gtk_editable_get_position(GTK_EDITABLE(textview->text));
1414
1415         if (event &&
1416             ((event->button == 1 && event->type == GDK_2BUTTON_PRESS)
1417              || event->button == 2 || event->button == 3)) {
1418                 GSList *cur;
1419
1420                 /* double click seems to set the cursor after the current
1421                  * word. The cursor position needs fixing, otherwise the
1422                  * last word of a clickable zone will not work */
1423                 if (event->button == 1 && event->type == GDK_2BUTTON_PRESS) {
1424                         textview->cur_pos--;
1425                 }
1426
1427                 for (cur = textview->uri_list; cur != NULL; cur = cur->next) {
1428                         RemoteURI *uri = (RemoteURI *)cur->data;
1429
1430                         if (textview->cur_pos >= uri->start &&
1431                             textview->cur_pos <  uri->end) {
1432                                 if (!g_strncasecmp(uri->uri, "mailto:", 7)) {
1433                                         if (event->button == 3) {
1434                                                 gchar *fromname, *fromaddress;
1435                                                 /* extract url */
1436                                                 fromaddress = g_strdup(uri->uri + 7);
1437                                                 /* Hiroyuki: please put this function in utils.c! */
1438                                                 fromname = procheader_get_fromname(fromaddress);
1439                                                 extract_address(fromaddress);
1440                                                 g_message("adding from textview %s <%s>", fromname, fromaddress);
1441                                                 // Add to address book - Match
1442                                                 addressbook_add_contact( fromname, fromaddress, NULL );
1443                                                 g_free(fromaddress);
1444                                                 g_free(fromname);
1445                                         } else {
1446                                                 compose_new_with_recipient
1447                                                         (NULL, uri->uri + 7);
1448                                         }
1449                                 } else {
1450                                         open_uri(uri->uri,
1451                                                  prefs_common.uri_cmd);
1452                                 }
1453                         }
1454                 }
1455         }
1456 }
1457
1458 static void textview_uri_list_remove_all(GSList *uri_list)
1459 {
1460         GSList *cur;
1461
1462         for (cur = uri_list; cur != NULL; cur = cur->next) {
1463                 if (cur->data) {
1464                         g_free(((RemoteURI *)cur->data)->uri);
1465                         g_free(cur->data);
1466                 }
1467         }
1468
1469         g_slist_free(uri_list);
1470 }