git.maemo.org Git - modest/blob - src/modest-tny-msg-view.c

   1 /* modest-tny-msg-view.c */
   2
   3 /* insert (c)/licensing information) */
   4
   5 #include "modest-tny-msg-view.h"
   6 #include "modest-tny-stream-gtkhtml.h"
   7 #include <tny-text-buffer-stream.h>
   8 #include <string.h>
   9 #include <regex.h>
  10 #include <ctype.h>
  11 #include <glib/gi18n.h>
  12
  13 /* 'private'/'protected' functions */
  14 static void     modest_tny_msg_view_class_init   (ModestTnyMsgViewClass *klass);
  15 static void     modest_tny_msg_view_init         (ModestTnyMsgView *obj);
  16 static void     modest_tny_msg_view_finalize     (GObject *obj);
  17
  18
  19 static GSList*  get_url_matches (GString *txt);
  20 static gboolean fill_gtkhtml_with_txt (GtkHTML* gtkhtml, const gchar* txt);
  21
  22 static gboolean on_link_clicked (GtkWidget *widget, const gchar *uri,
  23                                  ModestTnyMsgView *msg_view);
  24 static gboolean on_url_requested (GtkWidget *widget, const gchar *uri,
  25                                   GtkHTMLStream *stream,
  26                                   ModestTnyMsgView *msg_view);
  27
  28
  29 /*
  30  * we need these regexps to find URLs in plain text e-mails
  31  */
  32 typedef struct _UrlMatchPattern UrlMatchPattern;
  33 struct _UrlMatchPattern {
  34         gchar   *regex;
  35         regex_t *preg;
  36         gchar   *prefix;
  37
  38 };
  39 #define MAIL_VIEWER_URL_MATCH_PATTERNS  {\
  40         { "(file|http|ftp|https)://[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]+[-A-Za-z0-9_$%&=?/~#]",\
  41           NULL, NULL },\
  42         { "www\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
  43           NULL, "http://" },\
  44         { "ftp\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
  45           NULL, "ftp://" },\
  46         { "(voipto|callto|chatto|jabberto|xmpp):[-_a-z@0-9.\\+]+", \
  47            NULL, NULL},                                             \
  48         { "mailto:[-_a-z0-9.\\+]+@[-_a-z0-9.]+",                    \
  49           NULL, NULL},\
  50         { "[-_a-z0-9.\\+]+@[-_a-z0-9.]+",\
  51           NULL, "mailto:"}\
  52         }
  53
  54
  55 /* list my signals */
  56 enum {
  57         /* MY_SIGNAL_1, */
  58         /* MY_SIGNAL_2, */
  59         LAST_SIGNAL
  60 };
  61
  62 typedef struct _ModestTnyMsgViewPrivate ModestTnyMsgViewPrivate;
  63 struct _ModestTnyMsgViewPrivate {
  64         GtkWidget *gtkhtml;
  65         TnyMsgIface *msg;
  66 };
  67 #define MODEST_TNY_MSG_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
  68                                                  MODEST_TYPE_TNY_MSG_VIEW, \
  69                                                  ModestTnyMsgViewPrivate))
  70 /* globals */
  71 static GtkContainerClass *parent_class = NULL;
  72
  73 /* uncomment the following if you have defined any signals */
  74 /* static guint signals[LAST_SIGNAL] = {0}; */
  75
  76 GType
  77 modest_tny_msg_view_get_type (void)
  78 {
  79         static GType my_type = 0;
  80         if (!my_type) {
  81                 static const GTypeInfo my_info = {
  82                         sizeof(ModestTnyMsgViewClass),
  83                         NULL,           /* base init */
  84                         NULL,           /* base finalize */
  85                         (GClassInitFunc) modest_tny_msg_view_class_init,
  86                         NULL,           /* class finalize */
  87                         NULL,           /* class data */
  88                         sizeof(ModestTnyMsgView),
  89                         1,              /* n_preallocs */
  90                         (GInstanceInitFunc) modest_tny_msg_view_init,
  91                 };
  92                 my_type = g_type_register_static (GTK_TYPE_SCROLLED_WINDOW,
  93                                                   "ModestTnyMsgView",
  94                                                   &my_info, 0);
  95         }
  96         return my_type;
  97 }
  98
  99 static void
 100 modest_tny_msg_view_class_init (ModestTnyMsgViewClass *klass)
 101 {
 102         GObjectClass *gobject_class;
 103         gobject_class = (GObjectClass*) klass;
 104
 105         parent_class            = g_type_class_peek_parent (klass);
 106         gobject_class->finalize = modest_tny_msg_view_finalize;
 107
 108         g_type_class_add_private (gobject_class, sizeof(ModestTnyMsgViewPrivate));
 109 }
 110
 111 static void
 112 modest_tny_msg_view_init (ModestTnyMsgView *obj)
 113 {
 114         ModestTnyMsgViewPrivate *priv;
 115
 116         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(obj);
 117
 118         priv->msg = NULL;
 119
 120         priv->gtkhtml = gtk_html_new();
 121         gtk_html_set_editable        (GTK_HTML(priv->gtkhtml), FALSE);
 122         gtk_html_allow_selection     (GTK_HTML(priv->gtkhtml), TRUE);
 123         gtk_html_set_caret_mode      (GTK_HTML(priv->gtkhtml), FALSE);
 124         gtk_html_set_blocking        (GTK_HTML(priv->gtkhtml), FALSE);
 125         gtk_html_set_images_blocking (GTK_HTML(priv->gtkhtml), FALSE);
 126
 127         g_signal_connect (G_OBJECT(priv->gtkhtml), "link_clicked",
 128                           G_CALLBACK(on_link_clicked), obj);
 129
 130         g_signal_connect (G_OBJECT(priv->gtkhtml), "url_requested",
 131                           G_CALLBACK(on_url_requested), obj);
 132 }
 133
 134
 135 static void
 136 modest_tny_msg_view_finalize (GObject *obj)
 137 {
 138         ModestTnyMsgViewPrivate *priv;
 139         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(obj);
 140
 141         if (priv->gtkhtml)
 142                 g_object_unref (G_OBJECT(priv->gtkhtml));
 143 }
 144
 145 GtkWidget*
 146 modest_tny_msg_view_new (TnyMsgIface *msg)
 147 {
 148         GObject *obj;
 149         ModestTnyMsgView* self;
 150         ModestTnyMsgViewPrivate *priv;
 151
 152         obj  = G_OBJECT(g_object_new(MODEST_TYPE_TNY_MSG_VIEW, NULL));
 153         self = MODEST_TNY_MSG_VIEW(obj);
 154         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (self);
 155
 156         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(self),
 157                                        GTK_POLICY_AUTOMATIC,
 158                                        GTK_POLICY_AUTOMATIC);
 159
 160         if (priv->gtkhtml)
 161                 gtk_container_add (GTK_CONTAINER(obj), priv->gtkhtml);
 162
 163         if (msg)
 164                 modest_tny_msg_view_set_message (self, msg);
 165
 166         return GTK_WIDGET(self);
 167 }
 168
 169
 170
 171 static gboolean
 172 on_link_clicked (GtkWidget *widget, const gchar *uri,
 173                                  ModestTnyMsgView *msg_view)
 174 {
 175         g_message ("link clicked: %s", uri); /* FIXME */
 176 }
 177
 178
 179
 180 static TnyMsgMimePartIface *
 181 find_cid_image (TnyMsgIface *msg, const gchar *cid)
 182 {
 183         TnyMsgMimePartIface *part = NULL;
 184         GList *parts;
 185
 186         g_return_val_if_fail (msg, NULL);
 187         g_return_val_if_fail (cid, NULL);
 188
 189         parts  = (GList*) tny_msg_iface_get_parts (msg);
 190         while (parts && !part) {
 191                 const gchar *part_cid;
 192                 part = TNY_MSG_MIME_PART_IFACE(parts->data);
 193                 part_cid = tny_msg_mime_part_iface_get_content_id (part);
 194                 if (part_cid && strcmp (cid, part_cid) == 0)
 195                         return part; /* we found it! */
 196
 197                 part = NULL;
 198                 parts = parts->next;
 199         }
 200
 201         return part;
 202 }
 203
 204
 205 static gboolean
 206 on_url_requested (GtkWidget *widget, const gchar *uri,
 207                   GtkHTMLStream *stream,
 208                   ModestTnyMsgView *msg_view)
 209 {
 210
 211         ModestTnyMsgViewPrivate *priv;
 212         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (msg_view);
 213
 214         g_message ("url requested: %s", uri);
 215
 216         if (g_str_has_prefix (uri, "cid:")) {
 217                 /* +4 ==> skip "cid:" */
 218
 219                 TnyMsgMimePartIface *part = find_cid_image (priv->msg, uri + 4);
 220                 if (!part) {
 221                         g_message ("%s not found", uri + 4);
 222                         gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
 223                 } else {
 224                         TnyStreamIface *tny_stream =
 225                                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new(stream));
 226                         tny_msg_mime_part_iface_decode_to_stream (part,tny_stream);
 227                         gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
 228                 }
 229         }
 230         return TRUE;
 231 }
 232
 233
 234
 235
 236 typedef struct  {
 237         guint offset;
 238         guint len;
 239         const gchar* prefix;
 240 } url_match_t;
 241
 242
 243 static void
 244 hyperlinkify_plain_text (GString *txt)
 245 {
 246         GSList *cursor;
 247         GSList *match_list = get_url_matches (txt);
 248
 249         /* we will work backwards, so the offsets stay valid */
 250         for (cursor = match_list; cursor; cursor = cursor->next) {
 251
 252                 url_match_t *match = (url_match_t*) cursor->data;
 253                 gchar *url  = g_strndup (txt->str + match->offset, match->len);
 254                 gchar *repl = NULL; /* replacement  */
 255
 256                 /* the prefix is NULL: use the one that is already there */
 257                 repl = g_strdup_printf ("<a href=\"%s%s\">%s</a>",
 258                                         match->prefix ? match->prefix : "", url, url);
 259
 260                 /* replace the old thing with our hyperlink
 261                  * replacement thing */
 262                 g_string_erase  (txt, match->offset, match->len);
 263                 g_string_insert (txt, match->offset, repl);
 264
 265                 g_free (url);
 266                 g_free (repl);
 267
 268         }
 269         g_slist_free (match_list);
 270 }
 271
 272
 273
 274 static gchar *
 275 convert_to_html (const gchar *data)
 276 {
 277         int              i;
 278         gboolean         first_space = TRUE;
 279         GString         *html;
 280         gsize           len;
 281
 282         if (!data)
 283                 return NULL;
 284
 285         len = strlen (data);
 286         html = g_string_sized_new (len + 100);  /* just a  guess... */
 287
 288         g_string_append_printf (html,
 289                                 "<html>"
 290                                 "<head>"
 291                                 "<meta http-equiv=\"content-type\""
 292                                 " content=\"text/html; charset=utf8\">"
 293                                 "</head>"
 294                                 "<body><tt>");
 295
 296         /* replace with special html chars where needed*/
 297         for (i = 0; i != len; ++i)  {
 298                 char    kar = data[i];
 299                 switch (kar) {
 300
 301                 case 0:  break; /* ignore embedded \0s */
 302                 case '<' : g_string_append   (html, "&lt;"); break;
 303                 case '>' : g_string_append   (html, "&gt;"); break;
 304                 case '&' : g_string_append   (html, "&quot;"); break;
 305                 case '\n': g_string_append   (html, "<br>\n"); break;
 306                 default:
 307                         if (kar == ' ') {
 308                                 g_string_append (html, first_space ? " " : "&nbsp;");
 309                                 first_space = FALSE;
 310                         } else  if (kar == '\t')
 311                                 g_string_append (html, "&nbsp; &nbsp;&nbsp;");
 312                         else {
 313                                 int charnum = 0;
 314                                 first_space = TRUE;
 315                                 /* optimization trick: accumulate 'normal' chars, then copy */
 316                                 do {
 317                                         kar = data [++charnum + i];
 318
 319                                 } while ((i + charnum < len) &&
 320                                          (kar > '>' || (kar != '<' && kar != '>'
 321                                                         && kar != '&' && kar !=  ' '
 322                                                         && kar != '\n' && kar != '\t')));
 323                                 g_string_append_len (html, &data[i], charnum);
 324                                 i += (charnum  - 1);
 325                         }
 326                 }
 327         }
 328
 329         g_string_append (html, "</tt></body></html>");
 330         hyperlinkify_plain_text (html);
 331
 332         return g_string_free (html, FALSE);
 333 }
 334
 335
 336
 337
 338 static gint
 339 cmp_offsets_reverse (const url_match_t *match1, const url_match_t *match2)
 340 {
 341         return match2->offset - match1->offset;
 342 }
 343
 344
 345
 346 /*
 347  * check if the match is inside an existing match... */
 348 static void
 349 chk_partial_match (const url_match_t *match, int* offset)
 350 {
 351         if (*offset >= match->offset && *offset < match->offset + match->len)
 352                 *offset = -1;
 353 }
 354
 355 static GSList*
 356 get_url_matches (GString *txt)
 357 {
 358         regmatch_t rm;
 359         int rv, i, offset = 0;
 360         GSList *match_list = NULL;
 361
 362         static UrlMatchPattern patterns[] = MAIL_VIEWER_URL_MATCH_PATTERNS;
 363         const size_t pattern_num = sizeof(patterns)/sizeof(UrlMatchPattern);
 364
 365         /* initalize the regexps */
 366         for (i = 0; i != pattern_num; ++i) {
 367                 patterns[i].preg = g_new0 (regex_t,1);
 368                 g_assert(regcomp (patterns[i].preg, patterns[i].regex,
 369                                   REG_ICASE|REG_EXTENDED|REG_NEWLINE) == 0);
 370         }
 371         /* find all the matches */
 372         for (i = 0; i != pattern_num; ++i) {
 373                 offset     = 0;
 374                 while (1) {
 375                         int test_offset;
 376                         if ((rv = regexec (patterns[i].preg, txt->str + offset, 1, &rm, 0)) != 0) {
 377                                 g_assert (rv == REG_NOMATCH); /* this should not happen */
 378                                 break; /* try next regexp */
 379                         }
 380                         if (rm.rm_so == -1)
 381                                 break;
 382
 383                         /* FIXME: optimize this */
 384                         /* to avoid partial matches on something that was already found... */
 385                         /* check_partial_match will put -1 in the data ptr if that is the case */
 386                         test_offset = offset + rm.rm_so;
 387                         g_slist_foreach (match_list, (GFunc)chk_partial_match, &test_offset);
 388
 389                         /* make a list of our matches (<offset, len, prefix> tupels)*/
 390                         if (test_offset != -1) {
 391                                 url_match_t *match = g_new (url_match_t,1);
 392                                 match->offset = offset + rm.rm_so;
 393                                 match->len    = rm.rm_eo - rm.rm_so;
 394                                 match->prefix = patterns[i].prefix;
 395                                 match_list = g_slist_prepend (match_list, match);
 396                         }
 397                         offset += rm.rm_eo;
 398                 }
 399         }
 400
 401         for (i = 0; i != pattern_num; ++i) {
 402                 regfree (patterns[i].preg);
 403                 g_free  (patterns[i].preg);
 404         } /* don't free patterns itself -- it's static */
 405
 406         /* now sort the list, so the matches are in reverse order of occurence.
 407          * that way, we can do the replacements starting from the end, so we don't need
 408          * to recalculate the offsets
 409          */
 410         match_list = g_slist_sort (match_list,
 411                                    (GCompareFunc)cmp_offsets_reverse);
 412         return match_list;
 413 }
 414
 415 static gboolean
 416 fill_gtkhtml_with_txt (GtkHTML* gtkhtml, const gchar* txt)
 417 {
 418         gchar *html;
 419
 420         g_return_val_if_fail (gtkhtml, FALSE);
 421         g_return_val_if_fail (txt, FALSE);
 422
 423         html = convert_to_html (txt);
 424         gtk_html_load_from_string (gtkhtml, html,  strlen(html));
 425         g_free (html);
 426
 427         return TRUE;
 428 }
 429
 430
 431
 432 static TnyMsgMimePartIface *
 433 find_body_part (TnyMsgIface *msg, const gchar *mime_type)
 434 {
 435         TnyMsgMimePartIface *part = NULL;
 436         GList *parts;
 437
 438         g_return_val_if_fail (msg, NULL);
 439         g_return_val_if_fail (mime_type, NULL);
 440
 441         parts  = (GList*) tny_msg_iface_get_parts (msg);
 442         while (parts && !part) {
 443                 part = TNY_MSG_MIME_PART_IFACE(parts->data);
 444                 if (!tny_msg_mime_part_iface_content_type_is (part, mime_type))
 445                         part = NULL;
 446                 parts = parts->next;
 447         }
 448
 449         return part;
 450 }
 451
 452 static gboolean
 453 set_html_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 454 {
 455         TnyStreamIface *gtkhtml_stream;
 456         ModestTnyMsgViewPrivate *priv;
 457
 458         g_return_val_if_fail (self, FALSE);
 459         g_return_val_if_fail (tny_body, FALSE);
 460
 461         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 462
 463         gtkhtml_stream =
 464                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new
 465                                  (gtk_html_begin(GTK_HTML(priv->gtkhtml))));
 466
 467         tny_stream_iface_reset (gtkhtml_stream);
 468         tny_msg_mime_part_iface_decode_to_stream (tny_body, gtkhtml_stream);
 469         tny_stream_iface_reset (gtkhtml_stream);
 470
 471         g_object_unref (G_OBJECT(gtkhtml_stream));
 472
 473         return TRUE;
 474 }
 475
 476
 477 /* this is a hack --> we use the tny_text_buffer_stream to
 478  * get the message text, then write to gtkhtml 'by hand' */
 479 static gboolean
 480 set_text_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 481 {
 482         GtkTextBuffer *buf;
 483         GtkTextIter begin, end;
 484         TnyStreamIface* txt_stream;
 485         gchar *txt;
 486         ModestTnyMsgViewPrivate *priv;
 487
 488         g_return_val_if_fail (self, FALSE);
 489         g_return_val_if_fail (tny_body, FALSE);
 490
 491         priv           = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 492
 493         buf            = gtk_text_buffer_new (NULL);
 494         txt_stream     = TNY_STREAM_IFACE(tny_text_buffer_stream_new (buf));
 495
 496         tny_stream_iface_reset (txt_stream);
 497         tny_msg_mime_part_iface_decode_to_stream (tny_body, txt_stream);
 498         tny_stream_iface_reset (txt_stream);
 499
 500         gtk_text_buffer_get_bounds (buf, &begin, &end);
 501         txt = gtk_text_buffer_get_text (buf, &begin, &end, FALSE);
 502
 503         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), txt);
 504
 505         g_object_unref (G_OBJECT(txt_stream));
 506         g_object_unref (G_OBJECT(buf));
 507
 508         g_free (txt);
 509         return TRUE;
 510 }
 511
 512
 513
 514 void
 515 modest_tny_msg_view_set_message (ModestTnyMsgView *self, TnyMsgIface *msg)
 516 {
 517         TnyMsgMimePartIface *body;
 518         ModestTnyMsgViewPrivate *priv;
 519
 520         g_return_if_fail (self);
 521
 522         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 523
 524         priv->msg = msg;
 525
 526         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), "");
 527
 528         if (!msg)
 529                 return;
 530
 531         body = find_body_part (msg, "text/html");
 532         if (body) {
 533                 set_html_message (self, body);
 534                 return;
 535         }
 536
 537         body = find_body_part (msg, "text/plain");
 538         if (body) {
 539                 set_text_message (self, body);
 540                 return;
 541         }
 542
 543         /* hmmmmm */
 544         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml),
 545                                 _("Unsupported message type"));
 546 }
 547
 548
 549