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