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
 122         gtk_html_set_editable        (GTK_HTML(priv->gtkhtml), FALSE);
 123         gtk_html_allow_selection     (GTK_HTML(priv->gtkhtml), TRUE);
 124         gtk_html_set_caret_mode      (GTK_HTML(priv->gtkhtml), FALSE);
 125         gtk_html_set_blocking        (GTK_HTML(priv->gtkhtml), FALSE);
 126         gtk_html_set_images_blocking (GTK_HTML(priv->gtkhtml), FALSE);
 127
 128         g_signal_connect (G_OBJECT(priv->gtkhtml), "link_clicked",
 129                           G_CALLBACK(on_link_clicked), obj);
 130
 131         g_signal_connect (G_OBJECT(priv->gtkhtml), "url_requested",
 132                           G_CALLBACK(on_url_requested), obj);
 133 }
 134
 135
 136 static void
 137 modest_tny_msg_view_finalize (GObject *obj)
 138 {
 139
 140 }
 141
 142 GtkWidget*
 143 modest_tny_msg_view_new (TnyMsgIface *msg)
 144 {
 145         GObject *obj;
 146         ModestTnyMsgView* self;
 147         ModestTnyMsgViewPrivate *priv;
 148
 149         obj  = G_OBJECT(g_object_new(MODEST_TYPE_TNY_MSG_VIEW, NULL));
 150         self = MODEST_TNY_MSG_VIEW(obj);
 151         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (self);
 152
 153         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(self),
 154                                        GTK_POLICY_AUTOMATIC,
 155                                        GTK_POLICY_AUTOMATIC);
 156
 157         if (priv->gtkhtml)
 158                 gtk_container_add (GTK_CONTAINER(obj), priv->gtkhtml);
 159
 160         if (msg)
 161                 modest_tny_msg_view_set_message (self, msg);
 162
 163         return GTK_WIDGET(self);
 164 }
 165
 166
 167
 168 static gboolean
 169 on_link_clicked (GtkWidget *widget, const gchar *uri,
 170                                  ModestTnyMsgView *msg_view)
 171 {
 172         g_message ("link clicked: %s", uri); /* FIXME */
 173 }
 174
 175
 176
 177 static TnyMsgMimePartIface *
 178 find_cid_image (TnyMsgIface *msg, const gchar *cid)
 179 {
 180         TnyMsgMimePartIface *part = NULL;
 181         GList *parts;
 182
 183         g_return_val_if_fail (msg, NULL);
 184         g_return_val_if_fail (cid, NULL);
 185
 186         parts  = (GList*) tny_msg_iface_get_parts (msg);
 187         while (parts && !part) {
 188                 const gchar *part_cid;
 189                 part = TNY_MSG_MIME_PART_IFACE(parts->data);
 190                 part_cid = tny_msg_mime_part_iface_get_content_id (part);
 191                 if (part_cid && strcmp (cid, part_cid) == 0)
 192                         return part; /* we found it! */
 193
 194                 part = NULL;
 195                 parts = parts->next;
 196         }
 197
 198         return part;
 199 }
 200
 201
 202 static gboolean
 203 on_url_requested (GtkWidget *widget, const gchar *uri,
 204                   GtkHTMLStream *stream,
 205                   ModestTnyMsgView *msg_view)
 206 {
 207
 208         ModestTnyMsgViewPrivate *priv;
 209         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (msg_view);
 210
 211         g_message ("url requested: %s", uri);
 212
 213         if (g_str_has_prefix (uri, "cid:")) {
 214                 /* +4 ==> skip "cid:" */
 215
 216                 TnyMsgMimePartIface *part = find_cid_image (priv->msg, uri + 4);
 217                 if (!part) {
 218                         g_message ("%s not found", uri + 4);
 219                         gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
 220                 } else {
 221                         TnyStreamIface *tny_stream =
 222                                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new(stream));
 223                         tny_msg_mime_part_iface_decode_to_stream (part,tny_stream);
 224                         gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
 225                 }
 226         }
 227         return TRUE;
 228 }
 229
 230
 231
 232
 233 typedef struct  {
 234         guint offset;
 235         guint len;
 236         const gchar* prefix;
 237 } url_match_t;
 238
 239
 240 static void
 241 hyperlinkify_plain_text (GString *txt)
 242 {
 243         GSList *cursor;
 244         GSList *match_list = get_url_matches (txt);
 245
 246         /* we will work backwards, so the offsets stay valid */
 247         for (cursor = match_list; cursor; cursor = cursor->next) {
 248
 249                 url_match_t *match = (url_match_t*) cursor->data;
 250                 gchar *url  = g_strndup (txt->str + match->offset, match->len);
 251                 gchar *repl = NULL; /* replacement  */
 252
 253                 /* the prefix is NULL: use the one that is already there */
 254                 repl = g_strdup_printf ("<a href=\"%s%s\">%s</a>",
 255                                         match->prefix ? match->prefix : "", url, url);
 256
 257                 /* replace the old thing with our hyperlink
 258                  * replacement thing */
 259                 g_string_erase  (txt, match->offset, match->len);
 260                 g_string_insert (txt, match->offset, repl);
 261
 262                 g_free (url);
 263                 g_free (repl);
 264
 265         }
 266         g_slist_free (match_list);
 267 }
 268
 269
 270
 271 static gchar *
 272 convert_to_html (const gchar *data)
 273 {
 274         int              i;
 275         gboolean         first_space = TRUE;
 276         GString         *html;
 277         gsize           len;
 278
 279         if (!data)
 280                 return NULL;
 281
 282         len = strlen (data);
 283         html = g_string_sized_new (len + 100);  /* just a  guess... */
 284
 285         g_string_append_printf (html,
 286                                 "<html>"
 287                                 "<head>"
 288                                 "<meta http-equiv=\"content-type\""
 289                                 " content=\"text/html; charset=utf8\">"
 290                                 "</head>"
 291                                 "<body><tt>");
 292
 293         /* replace with special html chars where needed*/
 294         for (i = 0; i != len; ++i)  {
 295                 char    kar = data[i];
 296                 switch (kar) {
 297
 298                 case 0:  break; /* ignore embedded \0s */
 299                 case '<' : g_string_append   (html, "&lt;"); break;
 300                 case '>' : g_string_append   (html, "&gt;"); break;
 301                 case '&' : g_string_append   (html, "&quot;"); break;
 302                 case '\n': g_string_append   (html, "<br>\n"); break;
 303                 default:
 304                         if (kar == ' ') {
 305                                 g_string_append (html, first_space ? " " : "&nbsp;");
 306                                 first_space = FALSE;
 307                         } else  if (kar == '\t')
 308                                 g_string_append (html, "&nbsp; &nbsp;&nbsp;");
 309                         else {
 310                                 int charnum = 0;
 311                                 first_space = TRUE;
 312                                 /* optimization trick: accumulate 'normal' chars, then copy */
 313                                 do {
 314                                         kar = data [++charnum + i];
 315
 316                                 } while ((i + charnum < len) &&
 317                                          (kar > '>' || (kar != '<' && kar != '>'
 318                                                         && kar != '&' && kar !=  ' '
 319                                                         && kar != '\n' && kar != '\t')));
 320                                 g_string_append_len (html, &data[i], charnum);
 321                                 i += (charnum  - 1);
 322                         }
 323                 }
 324         }
 325
 326         g_string_append (html, "</tt></body></html>");
 327         hyperlinkify_plain_text (html);
 328
 329         return g_string_free (html, FALSE);
 330 }
 331
 332
 333
 334
 335 static gint
 336 cmp_offsets_reverse (const url_match_t *match1, const url_match_t *match2)
 337 {
 338         return match2->offset - match1->offset;
 339 }
 340
 341
 342
 343 /*
 344  * check if the match is inside an existing match... */
 345 static void
 346 chk_partial_match (const url_match_t *match, int* offset)
 347 {
 348         if (*offset >= match->offset && *offset < match->offset + match->len)
 349                 *offset = -1;
 350 }
 351
 352 static GSList*
 353 get_url_matches (GString *txt)
 354 {
 355         regmatch_t rm;
 356         int rv, i, offset = 0;
 357         GSList *match_list = NULL;
 358
 359         static UrlMatchPattern patterns[] = MAIL_VIEWER_URL_MATCH_PATTERNS;
 360         const size_t pattern_num = sizeof(patterns)/sizeof(UrlMatchPattern);
 361
 362         /* initalize the regexps */
 363         for (i = 0; i != pattern_num; ++i) {
 364                 patterns[i].preg = g_new0 (regex_t,1);
 365                 g_assert(regcomp (patterns[i].preg, patterns[i].regex,
 366                                   REG_ICASE|REG_EXTENDED|REG_NEWLINE) == 0);
 367         }
 368         /* find all the matches */
 369         for (i = 0; i != pattern_num; ++i) {
 370                 offset     = 0;
 371                 while (1) {
 372                         int test_offset;
 373                         if ((rv = regexec (patterns[i].preg, txt->str + offset, 1, &rm, 0)) != 0) {
 374                                 g_assert (rv == REG_NOMATCH); /* this should not happen */
 375                                 break; /* try next regexp */
 376                         }
 377                         if (rm.rm_so == -1)
 378                                 break;
 379
 380                         /* FIXME: optimize this */
 381                         /* to avoid partial matches on something that was already found... */
 382                         /* check_partial_match will put -1 in the data ptr if that is the case */
 383                         test_offset = offset + rm.rm_so;
 384                         g_slist_foreach (match_list, (GFunc)chk_partial_match, &test_offset);
 385
 386                         /* make a list of our matches (<offset, len, prefix> tupels)*/
 387                         if (test_offset != -1) {
 388                                 url_match_t *match = g_new (url_match_t,1);
 389                                 match->offset = offset + rm.rm_so;
 390                                 match->len    = rm.rm_eo - rm.rm_so;
 391                                 match->prefix = patterns[i].prefix;
 392                                 match_list = g_slist_prepend (match_list, match);
 393                         }
 394                         offset += rm.rm_eo;
 395                 }
 396         }
 397
 398         for (i = 0; i != pattern_num; ++i) {
 399                 regfree (patterns[i].preg);
 400                 g_free  (patterns[i].preg);
 401         } /* don't free patterns itself -- it's static */
 402
 403         /* now sort the list, so the matches are in reverse order of occurence.
 404          * that way, we can do the replacements starting from the end, so we don't need
 405          * to recalculate the offsets
 406          */
 407         match_list = g_slist_sort (match_list,
 408                                    (GCompareFunc)cmp_offsets_reverse);
 409         return match_list;
 410 }
 411
 412 static gboolean
 413 fill_gtkhtml_with_txt (GtkHTML* gtkhtml, const gchar* txt)
 414 {
 415         gchar *html;
 416
 417         g_return_val_if_fail (gtkhtml, FALSE);
 418         g_return_val_if_fail (txt, FALSE);
 419
 420         html = convert_to_html (txt);
 421         gtk_html_load_from_string (gtkhtml, html,  strlen(html));
 422         g_free (html);
 423
 424         return TRUE;
 425 }
 426
 427
 428
 429 static TnyMsgMimePartIface *
 430 find_body_part (TnyMsgIface *msg, const gchar *mime_type)
 431 {
 432         TnyMsgMimePartIface *part = NULL;
 433         GList *parts;
 434
 435         g_return_val_if_fail (msg, NULL);
 436         g_return_val_if_fail (mime_type, NULL);
 437
 438         parts  = (GList*) tny_msg_iface_get_parts (msg);
 439         while (parts && !part) {
 440                 part = TNY_MSG_MIME_PART_IFACE(parts->data);
 441                 if (!tny_msg_mime_part_iface_content_type_is (part, mime_type))
 442                         part = NULL;
 443                 parts = parts->next;
 444         }
 445
 446         return part;
 447 }
 448
 449 static gboolean
 450 set_html_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 451 {
 452         TnyStreamIface *gtkhtml_stream;
 453         ModestTnyMsgViewPrivate *priv;
 454
 455         g_return_val_if_fail (self, FALSE);
 456         g_return_val_if_fail (tny_body, FALSE);
 457
 458         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 459
 460         gtkhtml_stream =
 461                 TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new
 462                                  (gtk_html_begin(GTK_HTML(priv->gtkhtml))));
 463
 464         tny_stream_iface_reset (gtkhtml_stream);
 465         tny_msg_mime_part_iface_decode_to_stream (tny_body, gtkhtml_stream);
 466         tny_stream_iface_reset (gtkhtml_stream);
 467
 468         g_object_unref (G_OBJECT(gtkhtml_stream));
 469
 470         return TRUE;
 471 }
 472
 473
 474 /* this is a hack --> we use the tny_text_buffer_stream to
 475  * get the message text, then write to gtkhtml 'by hand' */
 476 static gboolean
 477 set_text_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body)
 478 {
 479         GtkTextBuffer *buf;
 480         GtkTextIter begin, end;
 481         TnyStreamIface* txt_stream;
 482         gchar *txt;
 483         ModestTnyMsgViewPrivate *priv;
 484
 485         g_return_val_if_fail (self, FALSE);
 486         g_return_val_if_fail (tny_body, FALSE);
 487
 488         priv           = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 489
 490         buf            = gtk_text_buffer_new (NULL);
 491         txt_stream     = TNY_STREAM_IFACE(tny_text_buffer_stream_new (buf));
 492
 493         tny_stream_iface_reset (txt_stream);
 494         tny_msg_mime_part_iface_decode_to_stream (tny_body, txt_stream);
 495         tny_stream_iface_reset (txt_stream);
 496
 497         gtk_text_buffer_get_bounds (buf, &begin, &end);
 498         txt = gtk_text_buffer_get_text (buf, &begin, &end, FALSE);
 499
 500         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), txt);
 501
 502         g_object_unref (G_OBJECT(txt_stream));
 503         g_object_unref (G_OBJECT(buf));
 504
 505         g_free (txt);
 506         return TRUE;
 507 }
 508
 509 GtkTextBuffer *
 510 modest_tny_msg_view_get_selected_text (ModestTnyMsgView *self)
 511 {
 512         ModestTnyMsgViewPrivate *priv;
 513         gchar *sel;
 514         GtkWidget *html;
 515         int len;
 516         GtkClipboard *clip;
 517         gchar *text;
 518         GtkTextBuffer *buf;
 519
 520         g_return_if_fail (self);
 521         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 522         html = priv->gtkhtml;
 523
 524         /* I'm sure there is a better way to check for selected text */
 525         sel = gtk_html_get_selection_html(GTK_HTML(html), &len);
 526         if (sel == NULL)
 527                 return NULL;
 528         g_free(sel);
 529
 530         clip = gtk_widget_get_clipboard(html, GDK_SELECTION_PRIMARY);
 531         text = gtk_clipboard_wait_for_text(clip);
 532         if (text == NULL)
 533                 return NULL;
 534
 535         buf = gtk_text_buffer_new(NULL);
 536         gtk_text_buffer_set_text(buf, text, -1);
 537         g_free(text);
 538         return buf;
 539 }
 540
 541 void
 542 modest_tny_msg_view_set_message (ModestTnyMsgView *self, TnyMsgIface *msg)
 543 {
 544         TnyMsgMimePartIface *body;
 545         ModestTnyMsgViewPrivate *priv;
 546
 547         g_return_if_fail (self);
 548
 549         priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
 550
 551         priv->msg = msg;
 552
 553         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml), "");
 554
 555         if (!msg)
 556                 return;
 557
 558         body = find_body_part (msg, "text/html");
 559         if (body) {
 560                 set_html_message (self, body);
 561                 return;
 562         }
 563
 564         body = find_body_part (msg, "text/plain");
 565         if (body) {
 566                 set_text_message (self, body);
 567                 return;
 568         }
 569
 570         /* hmmmmm */
 571         fill_gtkhtml_with_txt (GTK_HTML(priv->gtkhtml),
 572                                 _("Unsupported message type"));
 573 }