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