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 "modest-tny-msg-actions.h"
   8
   9 #include <tny-text-buffer-stream.h>
  10 #include <string.h>
  11 #include <regex.h>
  12 #include <ctype.h>
  13 #include <glib/gi18n.h>
  14
  15 /* 'private'/'protected' functions */
  16 static void     modest_tny_msg_view_class_init   (ModestTnyMsgViewClass *klass);
  17 static void     modest_tny_msg_view_init         (ModestTnyMsgView *obj);
  18 static void     modest_tny_msg_view_finalize     (GObject *obj);
  19
  20
  21 static GSList*  get_url_matches (GString *txt);
  22 static gboolean fill_gtkhtml_with_txt (GtkHTML* gtkhtml, const gchar* txt);
  23
  24 static gboolean on_link_clicked (GtkWidget *widget, const gchar *uri,
  25                                  ModestTnyMsgView *msg_view);
  26 static gboolean on_url_requested (GtkWidget *widget, const gchar *uri,
  27                                   GtkHTMLStream *stream,
  28                                   ModestTnyMsgView *msg_view);
  29
  30
  31 /*
  32  * we need these regexps to find URLs in plain text e-mails
  33  */
  34 typedef struct _UrlMatchPattern UrlMatchPattern;
  35 struct _UrlMatchPattern {
  36         gchar   *regex;
  37         regex_t *preg;
  38         gchar   *prefix;
  39
  40 };
  41 #define MAIL_VIEWER_URL_MATCH_PATTERNS  {\
  42         { "(file|http|ftp|https)://[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]+[-A-Za-z0-9_$%&=?/~#]",\
  43           NULL, NULL },\
  44         { "www\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
  45           NULL, "http://" },\
  46         { "ftp\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
  47           NULL, "ftp://" },\
  48         { "(voipto|callto|chatto|jabberto|xmpp):[-_a-z@0-9.\\+]+", \
  49            NULL, NULL},                                             \
  50         { "mailto:[-_a-z0-9.\\+]+@[-_a-z0-9.]+",                    \
  51           NULL, NULL},\
  52         { "[-_a-z0-9.\\+]+@[-_a-z0-9.]+",\
  53           NULL, "mailto:"}\
  54         }
  55
  56
  57 /* list my signals */
  58 enum {
  59         /* MY_SIGNAL_1, */
  60         /* MY_SIGNAL_2, */
  61         LAST_SIGNAL
  62 };
  63
  64 typedef struct _ModestTnyMsgViewPrivate ModestTnyMsgViewPrivate;
  65 struct _ModestTnyMsgViewPrivate {
  66         GtkWidget *gtkhtml;
  67         TnyMsgIface *msg;
  68 };
  69 #define MODEST_TNY_MSG_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
  70                                                  MODEST_TYPE_TNY_MSG_VIEW, \
  71                                                  ModestTnyMsgViewPrivate))
  72 /* globals */
  73 static GtkContainerClass *parent_class = NULL;
  74
  75 /* uncomment the following if you have defined any signals */
  76 /* static guint signals[LAST_SIGNAL] = {0}; */
  77
  78 GType
  79 modest_tny_msg_view_get_type (void)
  80 {
  81         static GType my_type = 0;
  82         if (!my_type) {
  83                 static const GTypeInfo my_info = {
  84                         sizeof(ModestTnyMsgViewClass),
  85                         NULL,           /* base init */
  86                         NULL,           /* base finalize */
  87                         (GClassInitFunc) modest_tny_msg_view_class_init,
  88                         NULL,           /* class finalize */
  89                         NULL,           /* class data */
  90                         sizeof(ModestTnyMsgView),
  91                         1,              /* n_preallocs */
  92                         (GInstanceInitFunc) modest_tny_msg_view_init,
  93                 };
  94                 my_type = g_type_register_static (GTK_TYPE_SCROLLED_WINDOW,
  95                                                   "ModestTnyMsgView",
  96                                                   &my_info, 0);
  97         }
  98         return my_type;
  99 }
 100
 101 static void
 102 modest_tny_msg_view_class_init (ModestTnyMsgViewClass *klass)
 103 {
 104         GObjectClass *gobject_class;
 105         gobject_class = (GObjectClass*) klass;
 106
 107         parent_class            = g_type_class_peek_parent (klass);
 108         gobject_class->finalize = modest_tny_msg_view_finalize;
 109
 110         g_type_class_add_private (gobject_class, sizeof(ModestTnyMsgViewPrivate));
 111 }
 112
 113 static void
 114 modest_tny_msg_view_init (ModestTnyMsgView *obj)
 115 {
 116         ModestTnyMsgViewPrivate *priv;
 117
 118         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(obj);
 119
 120         priv->msg = NULL;
 121
 122         priv->gtkhtml = gtk_html_new();
 123
 124         gtk_html_set_editable        (GTK_HTML(priv->gtkhtml), FALSE);
 125         gtk_html_allow_selection     (GTK_HTML(priv->gtkhtml), TRUE);
 126         gtk_html_set_caret_mode      (GTK_HTML(priv->gtkhtml), FALSE);
 127         gtk_html_set_blocking        (GTK_HTML(priv->gtkhtml), FALSE);
 128         gtk_html_set_images_blocking (GTK_HTML(priv->gtkhtml), FALSE);
 129
 130         g_signal_connect (G_OBJECT(priv->gtkhtml), "link_clicked",
 131                           G_CALLBACK(on_link_clicked), obj);
 132
 133         g_signal_connect (G_OBJECT(priv->gtkhtml), "url_requested",
 134                           G_CALLBACK(on_url_requested), obj);
 135 }
 136
 137
 138 static void
 139 modest_tny_msg_view_finalize (GObject *obj)
 140 {
 141
 142 }
 143
 144 GtkWidget*
 145 modest_tny_msg_view_new (TnyMsgIface *msg)
 146 {
 147         GObject *obj;
 148         ModestTnyMsgView* self;
 149         ModestTnyMsgViewPrivate *priv;
 150
 151         obj  = G_OBJECT(g_object_new(MODEST_TYPE_TNY_MSG_VIEW, NULL));
 152         self = MODEST_TNY_MSG_VIEW(obj);
 153         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (self);
 154
 155         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(self),
 156                                        GTK_POLICY_AUTOMATIC,
 157                                        GTK_POLICY_AUTOMATIC);
 158
 159         if (priv->gtkhtml)
 160                 gtk_container_add (GTK_CONTAINER(obj), priv->gtkhtml);
 161
 162         if (msg)
 163                 modest_tny_msg_view_set_message (self, msg);
 164
 165         return GTK_WIDGET(self);
 166 }
 167
 168
 169
 170 static gboolean
 171 on_link_clicked (GtkWidget *widget, const gchar *uri,
 172                                  ModestTnyMsgView *msg_view)
 173 {
 174         g_message ("link clicked: %s", uri); /* FIXME */
 175 }
 176
 177
 178
 179 static TnyMsgMimePartIface *
 180 find_cid_image (TnyMsgIface *msg, const gchar *cid)
 181 {
 182         TnyMsgMimePartIface *part = NULL;
 183         GList *parts;
 184
 185         g_return_val_if_fail (msg, NULL);
 186         g_return_val_if_fail (cid, NULL);
 187
 188         parts  = (GList*) tny_msg_iface_get_parts (msg);
 189         while (parts && !part) {
 190                 const gchar *part_cid;
 191                 part = TNY_MSG_MIME_PART_IFACE(parts->data);
 192                 part_cid = tny_msg_mime_part_iface_get_content_id (part);
 193                 if (part_cid && strcmp (cid, part_cid) == 0)
 194                         return part; /* we found it! */
 195
 196                 part = NULL;
 197                 parts = parts->next;
 198         }
 199
 200         return part;
 201 }
 202
 203
 204 static gboolean
 205 on_url_requested (GtkWidget *widget, const gchar *uri,
 206                   GtkHTMLStream *stream,
 207                   ModestTnyMsgView *msg_view)
 208 {
 209
 210         ModestTnyMsgViewPrivate *priv;
 211         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (msg_view);
 212
 213         g_message ("url requested: %s", uri);
 214
 215         if (g_str_has_prefix (uri, "cid:")) {
 216                 /* +4 ==> skip "cid:" */
 217
 218                 TnyMsgMimePartIface *part = find_cid_image (priv->msg, uri + 4);
 219                 if (!part) {
 220                         g_message ("%s not found", uri + 4);
 221                         gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
 222                 } else {
 223                         TnyStreamIface *tny_stream =
 224                                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new(stream));
 225                         tny_msg_mime_part_iface_decode_to_stream (part,tny_stream);
 226                         gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
 227                 }
 228         }
 229         return TRUE;
 230 }
 231
 232
 233
 234
 235 typedef struct  {
 236         guint offset;
 237         guint len;
 238         const gchar* prefix;
 239 } url_match_t;
 240
 241
 242 static void
 243 hyperlinkify_plain_text (GString *txt)
 244 {
 245         GSList *cursor;
 246         GSList *match_list = get_url_matches (txt);
 247
 248         /* we will work backwards, so the offsets stay valid */
 249         for (cursor = match_list; cursor; cursor = cursor->next) {
 250
 251                 url_match_t *match = (url_match_t*) cursor->data;
 252                 gchar *url  = g_strndup (txt->str + match->offset, match->len);
 253                 gchar *repl = NULL; /* replacement  */
 254
 255                 /* the prefix is NULL: use the one that is already there */
 256                 repl = g_strdup_printf ("<a href=\"%s%s\">%s</a>",
 257                                         match->prefix ? match->prefix : "", url, url);
 258
 259                 /* replace the old thing with our hyperlink
 260                  * replacement thing */
 261                 g_string_erase  (txt, match->offset, match->len);
 262                 g_string_insert (txt, match->offset, repl);
 263
 264                 g_free (url);
 265                 g_free (repl);
 266
 267                 g_free (cursor->data);
 268         }
 269
 270         g_slist_free (match_list);
 271 }
 272
 273
 274
 275 static gchar *
 276 convert_to_html (const gchar *data)
 277 {
 278         int              i;
 279         gboolean         first_space = TRUE;
 280         GString         *html;
 281         gsize           len;
 282
 283         if (!data)
 284                 return NULL;
 285
 286         len = strlen (data);
 287         html = g_string_sized_new (len + 100);  /* just a  guess... */
 288
 289         g_string_append_printf (html,
 290                                 "<html>"
 291                                 "<head>"
 292                                 "<meta http-equiv=\"content-type\""
 293                                 " content=\"text/html; charset=utf8\">"
 294                                 "</head>"
 295                                 "<body><tt>");
 296
 297         /* replace with special html chars where needed*/
 298         for (i = 0; i != len; ++i)  {
 299                 char    kar = data[i];
 300                 switch (kar) {
 301
 302                 case 0:  break; /* ignore embedded \0s */
 303                 case '<' : g_string_append   (html, "&lt;"); break;
 304                 case '>' : g_string_append   (html, "&gt;"); break;
 305                 case '&' : g_string_append   (html, "&quot;"); break;
 306                 case '\n': g_string_append   (html, "<br>\n"); break;
 307                 default:
 308                         if (kar == ' ') {
 309                                 g_string_append (html, first_space ? " " : "&nbsp;");
 310                                 first_space = FALSE;
 311                         } else  if (kar == '\t')
 312                                 g_string_append (html, "&nbsp; &nbsp;&nbsp;");
 313                         else {
 314                                 int charnum = 0;
 315                                 first_space = TRUE;
 316                                 /* optimization trick: accumulate 'normal' chars, then copy */
 317                                 do {
 318                                         kar = data [++charnum + i];
 319
 320                                 } while ((i + charnum < len) &&
 321                                          (kar > '>' || (kar != '<' && kar != '>'
 322                                                         && kar != '&' && kar !=  ' '
 323                                                         && kar != '\n' && kar != '\t')));
 324                                 g_string_append_len (html, &data[i], charnum);
 325                                 i += (charnum  - 1);
 326                         }
 327                 }
 328         }
 329
 330         g_string_append (html, "</tt></body></html>");
 331         hyperlinkify_plain_text (html);
 332
 333         return g_string_free (html, FALSE);
 334 }
 335
 336
 337
 338
 339 static gint
 340 cmp_offsets_reverse (const url_match_t *match1, const url_match_t *match2)
 341 {
 342         return match2->offset - match1->offset;
 343 }
 344
 345
 346
 347 /*
 348  * check if the match is inside an existing match... */
 349 static void
 350 chk_partial_match (const url_match_t *match, int* offset)
 351 {
 352         if (*offset >= match->offset && *offset < match->offset + match->len)
 353                 *offset = -1;
 354 }
 355
 356 static GSList*
 357 get_url_matches (GString *txt)
 358 {
 359         regmatch_t rm;
 360         int rv, i, offset = 0;
 361         GSList *match_list = NULL;
 362
 363         static UrlMatchPattern patterns[] = MAIL_VIEWER_URL_MATCH_PATTERNS;
 364         const size_t pattern_num = sizeof(patterns)/sizeof(UrlMatchPattern);
 365
 366         /* initalize the regexps */
 367         for (i = 0; i != pattern_num; ++i) {
 368                 patterns[i].preg = g_new0 (regex_t,1);
 369                 g_assert(regcomp (patterns[i].preg, patterns[i].regex,
 370                                   REG_ICASE|REG_EXTENDED|REG_NEWLINE) == 0);
 371         }
 372         /* find all the matches */
 373         for (i = 0; i != pattern_num; ++i) {
 374                 offset     = 0;
 375                 while (1) {
 376                         int test_offset;
 377                         if ((rv = regexec (patterns[i].preg, txt->str + offset, 1, &rm, 0)) != 0) {
 378                                 g_assert (rv == REG_NOMATCH); /* this should not happen */
 379                                 break; /* try next regexp */
 380                         }
 381                         if (rm.rm_so == -1)
 382                                 break;
 383
 384                         /* FIXME: optimize this */
 385                         /* to avoid partial matches on something that was already found... */
 386                         /* check_partial_match will put -1 in the data ptr if that is the case */
 387                         test_offset = offset + rm.rm_so;
 388                         g_slist_foreach (match_list, (GFunc)chk_partial_match, &test_offset);
 389
 390                         /* make a list of our matches (<offset, len, prefix> tupels)*/
 391                         if (test_offset != -1) {
 392                                 url_match_t *match = g_new (url_match_t,1);
 393                                 match->offset = offset + rm.rm_so;
 394                                 match->len    = rm.rm_eo - rm.rm_so;
 395                                 match->prefix = patterns[i].prefix;
 396                                 match_list = g_slist_prepend (match_list, match);
 397                         }
 398                         offset += rm.rm_eo;
 399                 }
 400         }
 401
 402         for (i = 0; i != pattern_num; ++i) {
 403                 regfree (patterns[i].preg);
 404                 g_free  (patterns[i].preg);
 405         } /* don't free patterns itself -- it's static */
 406
 407         /* now sort the list, so the matches are in reverse order of occurence.
 408          * that way, we can do the replacements starting from the end, so we don't need
 409          * to recalculate the offsets
 410          */
 411         match_list = g_slist_sort (match_list,
 412                                    (GCompareFunc)cmp_offsets_reverse);
 413         return match_list;
 414 }
 415
 416 static gboolean
 417 fill_gtkhtml_with_txt (GtkHTML* gtkhtml, const gchar* txt)
 418 {
 419         gchar *html;
 420
 421         g_return_val_if_fail (gtkhtml, FALSE);
 422         g_return_val_if_fail (txt, FALSE);
 423
 424         html = convert_to_html (txt);
 425         gtk_html_load_from_string (gtkhtml, html,  strlen(html));
 426         g_free (html);
 427
 428         return TRUE;
 429 }
 430
 431
 432
 433 static gboolean
 434 set_html_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 435 {
 436         TnyStreamIface *gtkhtml_stream;
 437         ModestTnyMsgViewPrivate *priv;
 438
 439         g_return_val_if_fail (self, FALSE);
 440         g_return_val_if_fail (tny_body, FALSE);
 441
 442         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 443
 444         gtkhtml_stream =
 445                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new
 446                                  (gtk_html_begin(GTK_HTML(priv->gtkhtml))));
 447
 448         tny_stream_iface_reset (gtkhtml_stream);
 449         tny_msg_mime_part_iface_decode_to_stream (tny_body, gtkhtml_stream);
 450         tny_stream_iface_reset (gtkhtml_stream);
 451
 452         g_object_unref (G_OBJECT(gtkhtml_stream));
 453
 454         return TRUE;
 455 }
 456
 457
 458 /* this is a hack --> we use the tny_text_buffer_stream to
 459  * get the message text, then write to gtkhtml 'by hand' */
 460 static gboolean
 461 set_text_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 462 {
 463         GtkTextBuffer *buf;
 464         GtkTextIter begin, end;
 465         TnyStreamIface* txt_stream;
 466         gchar *txt;
 467         ModestTnyMsgViewPrivate *priv;
 468
 469         g_return_val_if_fail (self, FALSE);
 470         g_return_val_if_fail (tny_body, FALSE);
 471
 472         priv           = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 473
 474         buf            = gtk_text_buffer_new (NULL);
 475         txt_stream     = TNY_STREAM_IFACE(tny_text_buffer_stream_new (buf));
 476
 477         tny_stream_iface_reset (txt_stream);
 478         tny_msg_mime_part_iface_decode_to_stream (tny_body, txt_stream);
 479         tny_stream_iface_reset (txt_stream);
 480
 481         gtk_text_buffer_get_bounds (buf, &begin, &end);
 482         txt = gtk_text_buffer_get_text (buf, &begin, &end, FALSE);
 483
 484         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), txt);
 485
 486         g_object_unref (G_OBJECT(txt_stream));
 487         g_object_unref (G_OBJECT(buf));
 488
 489         g_free (txt);
 490         return TRUE;
 491 }
 492
 493 gchar *
 494 modest_tny_msg_view_get_selected_text (ModestTnyMsgView *self)
 495 {
 496         ModestTnyMsgViewPrivate *priv;
 497         gchar *sel;
 498         GtkWidget *html;
 499         int len;
 500         GtkClipboard *clip;
 501         gchar *text;
 502         GtkTextBuffer *buf;
 503
 504         g_return_if_fail (self);
 505         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 506         html = priv->gtkhtml;
 507
 508         /* I'm sure there is a better way to check for selected text */
 509         sel = gtk_html_get_selection_html(GTK_HTML(html), &len);
 510         if (!sel)
 511                 return NULL;
 512
 513         g_free(sel);
 514
 515         clip = gtk_widget_get_clipboard(html, GDK_SELECTION_PRIMARY);
 516         return gtk_clipboard_wait_for_text(clip);
 517 }
 518
 519 void
 520 modest_tny_msg_view_set_message (ModestTnyMsgView *self, TnyMsgIface *msg)
 521 {
 522         TnyMsgMimePartIface *body;
 523         ModestTnyMsgViewPrivate *priv;
 524
 525         g_return_if_fail (self);
 526
 527         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 528
 529         priv->msg = msg;
 530
 531         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), "");
 532
 533         if (!msg)
 534                 return;
 535
 536         body = modest_tny_msg_actions_find_body_part (msg, "text/html");
 537         if (body) {
 538                 set_html_message (self, body);
 539                 return;
 540         }
 541
 542         body = modest_tny_msg_actions_find_body_part (msg, "text/plain");
 543         if (body) {
 544                 set_text_message (self, body);
 545                 return;
 546         }
 547
 548         /* hmmmmm */
 549         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml),
 550                                 _("Unsupported message type"));
 551 }