git.maemo.org Git - modest/blob - src/modest-formatter.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <glib/gi18n.h>
  31 #include <string.h>
  32 #include <tny-header.h>
  33 #include <tny-simple-list.h>
  34 #include <tny-gtk-text-buffer-stream.h>
  35 #include <tny-camel-mem-stream.h>
  36 #include <tny-camel-html-to-text-stream.h>
  37 #include "modest-formatter.h"
  38 #include "modest-text-utils.h"
  39 #include "modest-tny-platform-factory.h"
  40 #include <modest-runtime.h>
  41
  42 #define LINE_WRAP 78
  43 #define MAX_BODY_LINES 1024
  44 #define MAX_BODY_LENGTH 1024*128
  45
  46 typedef struct _ModestFormatterPrivate ModestFormatterPrivate;
  47 struct _ModestFormatterPrivate {
  48         gchar *content_type;
  49         gchar *signature;
  50 };
  51 #define MODEST_FORMATTER_GET_PRIVATE(o)  (G_TYPE_INSTANCE_GET_PRIVATE((o), \
  52                                           MODEST_TYPE_FORMATTER, \
  53                                           ModestFormatterPrivate))
  54
  55 static GObjectClass *parent_class = NULL;
  56
  57 typedef gchar* FormatterFunc (ModestFormatter *self, const gchar *text, TnyHeader *header, GList *attachments);
  58
  59 static TnyMsg *modest_formatter_do (ModestFormatter *self, TnyMimePart *body,  TnyHeader *header,
  60                                     FormatterFunc func, GList *attachments);
  61
  62 static gchar*  modest_formatter_wrapper_cite   (ModestFormatter *self, const gchar *text,
  63                                                 TnyHeader *header, GList *attachments);
  64 static gchar*  modest_formatter_wrapper_quote  (ModestFormatter *self, const gchar *text,
  65                                                 TnyHeader *header, GList *attachments);
  66 static gchar*  modest_formatter_wrapper_inline (ModestFormatter *self, const gchar *text,
  67                                                 TnyHeader *header, GList *attachments);
  68
  69 static TnyMimePart *find_body_parent (TnyMimePart *part);
  70
  71 static gchar *
  72 extract_text (ModestFormatter *self, TnyMimePart *body)
  73 {
  74         TnyStream *mp_stream;
  75         TnyStream *stream;
  76         TnyStream *input_stream;
  77         GtkTextBuffer *buf;
  78         GtkTextIter start, end;
  79         gchar *text;
  80         ModestFormatterPrivate *priv;
  81         gint total, total_lines, line_chars;
  82
  83         buf = gtk_text_buffer_new (NULL);
  84         stream = TNY_STREAM (tny_gtk_text_buffer_stream_new (buf));
  85         tny_stream_reset (stream);
  86         mp_stream = tny_mime_part_get_decoded_stream (body);
  87
  88         if (g_strcmp0 (tny_mime_part_get_content_type (body), "text/html") == 0) {
  89                 input_stream = tny_camel_html_to_text_stream_new (mp_stream);
  90         } else {
  91                 input_stream = g_object_ref (mp_stream);
  92         }
  93
  94         total = 0;
  95         total_lines = 0;
  96         line_chars = 0;
  97
  98         while (!tny_stream_is_eos (input_stream)) {
  99                 gchar buffer [128];
 100                 gchar *offset;
 101                 gint n_read;
 102                 gint next_read;
 103
 104                 next_read = MIN (128, MAX_BODY_LENGTH - total);
 105                 if (next_read == 0)
 106                         break;
 107                 n_read = tny_stream_read (input_stream, buffer, next_read);
 108
 109                 offset = buffer;
 110                 while (offset < buffer + n_read) {
 111
 112                         if (*offset == '\n') {
 113                                 total_lines ++;
 114                                 line_chars = 0;
 115                         } else {
 116                                 line_chars ++;
 117                                 if (line_chars >= LINE_WRAP) {
 118                                         total_lines ++;
 119                                         line_chars = 0;
 120                                 }
 121                         }
 122                         if (total_lines >= MAX_BODY_LINES)
 123                                 break;
 124                         offset++;
 125                 }
 126
 127
 128
 129                 if (offset - buffer > 0) {
 130                         gint n_write;
 131                         n_write = tny_stream_write (stream, buffer, offset - buffer);
 132                         total += n_write;
 133                 } else if (n_read == -1) {
 134                         break;
 135                 }
 136
 137                 if (total_lines >= MAX_BODY_LINES)
 138                         break;
 139         }
 140
 141         tny_stream_reset (stream);
 142
 143         g_object_unref (G_OBJECT(stream));
 144         g_object_unref (G_OBJECT (mp_stream));
 145         g_object_unref (G_OBJECT (input_stream));
 146
 147         gtk_text_buffer_get_bounds (buf, &start, &end);
 148         text = gtk_text_buffer_get_text (buf, &start, &end, FALSE);
 149         g_object_unref (G_OBJECT(buf));
 150
 151         /* Convert to desired content type if needed */
 152         priv = MODEST_FORMATTER_GET_PRIVATE (self);
 153
 154         return text;
 155 }
 156
 157 static void
 158 construct_from_text (TnyMimePart *part,
 159                      const gchar *text,
 160                      const gchar *content_type)
 161 {
 162         TnyStream *text_body_stream;
 163
 164         /* Create the stream */
 165         text_body_stream = TNY_STREAM (tny_camel_mem_stream_new_with_buffer
 166                                         (text, strlen(text)));
 167
 168         /* Construct MIME part */
 169         tny_stream_reset (text_body_stream);
 170         tny_mime_part_construct (part, text_body_stream, content_type, "7bit");
 171         tny_stream_reset (text_body_stream);
 172
 173         /* Clean */
 174         g_object_unref (G_OBJECT (text_body_stream));
 175 }
 176
 177 static TnyMsg *
 178 modest_formatter_do (ModestFormatter *self, TnyMimePart *body, TnyHeader *header, FormatterFunc func,
 179                      GList *attachments)
 180 {
 181         TnyMsg *new_msg = NULL;
 182         gchar *body_text = NULL, *txt = NULL;
 183         ModestFormatterPrivate *priv;
 184         TnyMimePart *body_part = NULL;
 185
 186         g_return_val_if_fail (self, NULL);
 187         g_return_val_if_fail (header, NULL);
 188         g_return_val_if_fail (func, NULL);
 189
 190         /* Build new part */
 191         new_msg = modest_formatter_create_message (self, TRUE, attachments != NULL, FALSE);
 192         body_part = modest_formatter_create_body_part (self, new_msg);
 193
 194         if (body)
 195                 body_text = extract_text (self, body);
 196         else
 197                 body_text = g_strdup ("");
 198
 199         txt = (gchar *) func (self, (const gchar*) body_text, header, attachments);
 200         priv = MODEST_FORMATTER_GET_PRIVATE (self);
 201         construct_from_text (TNY_MIME_PART (body_part), (const gchar*) txt, priv->content_type);
 202         g_object_unref (body_part);
 203
 204         /* Clean */
 205         g_free (body_text);
 206         g_free (txt);
 207
 208         return new_msg;
 209 }
 210
 211 TnyMsg *
 212 modest_formatter_cite (ModestFormatter *self, TnyMimePart *body, TnyHeader *header)
 213 {
 214         return modest_formatter_do (self, body, header, modest_formatter_wrapper_cite, NULL);
 215 }
 216
 217 TnyMsg *
 218 modest_formatter_quote (ModestFormatter *self, TnyMimePart *body, TnyHeader *header, GList *attachments)
 219 {
 220         return modest_formatter_do (self, body, header, modest_formatter_wrapper_quote, attachments);
 221 }
 222
 223 TnyMsg *
 224 modest_formatter_inline (ModestFormatter *self, TnyMimePart *body, TnyHeader *header, GList *attachments)
 225 {
 226         return modest_formatter_do (self, body, header, modest_formatter_wrapper_inline, attachments);
 227 }
 228
 229 TnyMsg *
 230 modest_formatter_attach (ModestFormatter *self, TnyMsg *msg, TnyHeader *header)
 231 {
 232         TnyMsg *new_msg = NULL;
 233         TnyMimePart *body_part = NULL;
 234         ModestFormatterPrivate *priv;
 235         gchar *txt;
 236
 237         /* Build new part */
 238         new_msg     = modest_formatter_create_message (self, TRUE, TRUE, FALSE);
 239         body_part = modest_formatter_create_body_part (self, new_msg);
 240
 241         /* Create the two parts */
 242         priv = MODEST_FORMATTER_GET_PRIVATE (self);
 243         txt = modest_text_utils_cite ("", priv->content_type, priv->signature,
 244                                       NULL, tny_header_get_date_sent (header));
 245         construct_from_text (body_part, txt, priv->content_type);
 246         g_free (txt);
 247         g_object_unref (body_part);
 248
 249         if (msg) {
 250                 /* Add parts */
 251                 tny_mime_part_add_part (TNY_MIME_PART (new_msg), TNY_MIME_PART (msg));
 252         }
 253
 254         return new_msg;
 255 }
 256
 257 ModestFormatter*
 258 modest_formatter_new (const gchar *content_type, const gchar *signature)
 259 {
 260         ModestFormatter *formatter;
 261         ModestFormatterPrivate *priv;
 262
 263         formatter = g_object_new (MODEST_TYPE_FORMATTER, NULL);
 264         priv = MODEST_FORMATTER_GET_PRIVATE (formatter);
 265         priv->content_type = g_strdup (content_type);
 266         priv->signature = g_strdup (signature);
 267
 268         return formatter;
 269 }
 270
 271 static void
 272 modest_formatter_instance_init (GTypeInstance *instance, gpointer g_class)
 273 {
 274         ModestFormatter *self = (ModestFormatter *)instance;
 275         ModestFormatterPrivate *priv = MODEST_FORMATTER_GET_PRIVATE (self);
 276
 277         priv->content_type = NULL;
 278         priv->signature = NULL;
 279 }
 280
 281 static void
 282 modest_formatter_finalize (GObject *object)
 283 {
 284         ModestFormatter *self = (ModestFormatter *)object;
 285         ModestFormatterPrivate *priv = MODEST_FORMATTER_GET_PRIVATE (self);
 286
 287         if (priv->content_type)
 288                 g_free (priv->content_type);
 289
 290         if (priv->signature)
 291                 g_free (priv->signature);
 292
 293         (*parent_class->finalize) (object);
 294 }
 295
 296 static void
 297 modest_formatter_class_init (ModestFormatterClass *class)
 298 {
 299         GObjectClass *object_class;
 300
 301         parent_class = g_type_class_peek_parent (class);
 302         object_class = (GObjectClass*) class;
 303         object_class->finalize = modest_formatter_finalize;
 304
 305         g_type_class_add_private (object_class, sizeof (ModestFormatterPrivate));
 306 }
 307
 308 GType
 309 modest_formatter_get_type (void)
 310 {
 311         static GType type = 0;
 312
 313         if (G_UNLIKELY(type == 0))
 314         {
 315                 static const GTypeInfo info =
 316                 {
 317                   sizeof (ModestFormatterClass),
 318                   NULL,   /* base_init */
 319                   NULL,   /* base_finalize */
 320                   (GClassInitFunc) modest_formatter_class_init,   /* class_init */
 321                   NULL,   /* class_finalize */
 322                   NULL,   /* class_data */
 323                   sizeof (ModestFormatter),
 324                   0,      /* n_preallocs */
 325                   modest_formatter_instance_init    /* instance_init */
 326                 };
 327
 328                 type = g_type_register_static (G_TYPE_OBJECT,
 329                         "ModestFormatter",
 330                         &info, 0);
 331         }
 332
 333         return type;
 334 }
 335
 336 /****************/
 337 static gchar *
 338 modest_formatter_wrapper_cite (ModestFormatter *self, const gchar *text, TnyHeader *header,
 339                                GList *attachments)
 340 {
 341         gchar *result, *from;
 342         ModestFormatterPrivate *priv = MODEST_FORMATTER_GET_PRIVATE (self);
 343
 344         from = tny_header_dup_from (header);
 345         result = modest_text_utils_cite (text,
 346                                          priv->content_type,
 347                                          priv->signature,
 348                                          from,
 349                                          tny_header_get_date_sent (header));
 350         g_free (from);
 351         return result;
 352 }
 353
 354 static gchar *
 355 modest_formatter_wrapper_inline (ModestFormatter *self, const gchar *text, TnyHeader *header,
 356                                  GList *attachments)
 357 {
 358         gchar *result, *from, *to, *subject;
 359         ModestFormatterPrivate *priv = MODEST_FORMATTER_GET_PRIVATE (self);
 360
 361         from = tny_header_dup_from (header);
 362         to = tny_header_dup_to (header);
 363         subject = tny_header_dup_subject (header);
 364         result =  modest_text_utils_inline (text,
 365                                             priv->content_type,
 366                                             priv->signature,
 367                                             from,
 368                                             tny_header_get_date_sent (header),
 369                                             to,
 370                                             subject);
 371         g_free (subject);
 372         g_free (to);
 373         g_free (from);
 374         return result;
 375 }
 376
 377 static gchar *
 378 modest_formatter_wrapper_quote (ModestFormatter *self, const gchar *text, TnyHeader *header,
 379                                 GList *attachments)
 380 {
 381         ModestFormatterPrivate *priv = MODEST_FORMATTER_GET_PRIVATE (self);
 382         GList *filenames = NULL;
 383         GList *node = NULL;
 384         gchar *result = NULL;
 385         gchar *from;
 386
 387         /* First we need a GList of attachments filenames */
 388         for (node = attachments; node != NULL; node = g_list_next (node)) {
 389                 TnyMimePart *part = (TnyMimePart *) node->data;
 390                 gchar *filename = NULL;
 391                 if (TNY_IS_MSG (part)) {
 392                         TnyHeader *header = tny_msg_get_header (TNY_MSG (part));
 393                         filename = tny_header_dup_subject (header);
 394                         if ((filename == NULL)||(filename[0] == '\0')) {
 395                                 g_free (filename);
 396                                 filename = g_strdup (_("mail_va_no_subject"));
 397                         }
 398                         g_object_unref (header);
 399                 } else {
 400                         filename = g_strdup (tny_mime_part_get_filename (part));
 401                         if ((filename == NULL)||(filename[0] == '\0')) {
 402                                 g_free (filename);
 403                                 filename = g_strdup ("");
 404                         }
 405                 }
 406                 filenames = g_list_prepend (filenames, filename);
 407         }
 408
 409         /* TODO: get 80 from the configuration */
 410         from = tny_header_dup_from (header);
 411         result = modest_text_utils_quote (text,
 412                                           priv->content_type,
 413                                           priv->signature,
 414                                           from,
 415                                           tny_header_get_date_sent (header),
 416                                           filenames,
 417                                           80);
 418         g_free (from);
 419
 420         g_list_foreach (filenames, (GFunc) g_free, NULL);
 421         g_list_free (filenames);
 422         return result;
 423 }
 424
 425 TnyMsg *
 426 modest_formatter_create_message (ModestFormatter *self, gboolean single_body,
 427                                  gboolean has_attachments, gboolean has_images)
 428 {
 429         TnyMsg *result = NULL;
 430         TnyPlatformFactory *fact = NULL;
 431         TnyMimePart *body_mime_part = NULL;
 432         TnyMimePart *related_mime_part = NULL;
 433
 434         fact    = modest_runtime_get_platform_factory ();
 435         result = tny_platform_factory_new_msg (fact);
 436         if (has_attachments) {
 437                 tny_mime_part_set_content_type (TNY_MIME_PART (result), "multipart/mixed");
 438                 if (has_images) {
 439                         related_mime_part = tny_platform_factory_new_mime_part (fact);
 440                         tny_mime_part_set_content_type (related_mime_part, "multipart/related");
 441                         tny_mime_part_add_part (TNY_MIME_PART (result), related_mime_part);
 442                 } else {
 443                         related_mime_part = g_object_ref (result);
 444                 }
 445
 446                 if (!single_body) {
 447                         body_mime_part = tny_platform_factory_new_mime_part (fact);
 448                         tny_mime_part_set_content_type (body_mime_part, "multipart/alternative");
 449                         tny_mime_part_add_part (TNY_MIME_PART (related_mime_part), body_mime_part);
 450                         g_object_unref (body_mime_part);
 451                 }
 452
 453                 g_object_unref (related_mime_part);
 454         } else if (has_images) {
 455                 tny_mime_part_set_content_type (TNY_MIME_PART (result), "multipart/related");
 456
 457                 if (!single_body) {
 458                         body_mime_part = tny_platform_factory_new_mime_part (fact);
 459                         tny_mime_part_set_content_type (body_mime_part, "multipart/alternative");
 460                         tny_mime_part_add_part (TNY_MIME_PART (result), body_mime_part);
 461                         g_object_unref (body_mime_part);
 462                 }
 463
 464         } else if (!single_body) {
 465                 tny_mime_part_set_content_type (TNY_MIME_PART (result), "multipart/alternative");
 466         }
 467
 468         return result;
 469 }
 470
 471 TnyMimePart *
 472 find_body_parent (TnyMimePart *part)
 473 {
 474         const gchar *msg_content_type = NULL;
 475         msg_content_type = tny_mime_part_get_content_type (part);
 476
 477         if ((msg_content_type != NULL) &&
 478             (!g_strcasecmp (msg_content_type, "multipart/alternative")))
 479                 return g_object_ref (part);
 480         else if ((msg_content_type != NULL) &&
 481                  (g_str_has_prefix (msg_content_type, "multipart/"))) {
 482                 TnyIterator *iter = NULL;
 483                 TnyMimePart *alternative_part = NULL;
 484                 TnyMimePart *related_part = NULL;
 485                 TnyList *parts = TNY_LIST (tny_simple_list_new ());
 486                 tny_mime_part_get_parts (TNY_MIME_PART (part), parts);
 487                 iter = tny_list_create_iterator (parts);
 488
 489                 while (!tny_iterator_is_done (iter)) {
 490                         TnyMimePart *part = TNY_MIME_PART (tny_iterator_get_current (iter));
 491                         if (part && !g_strcasecmp(tny_mime_part_get_content_type (part), "multipart/alternative")) {
 492                                 alternative_part = part;
 493                                 break;
 494                         } else if (part && !g_strcasecmp (tny_mime_part_get_content_type (part), "multipart/related")) {
 495                                 related_part = part;
 496                                 break;
 497                         }
 498
 499                         if (part)
 500                                 g_object_unref (part);
 501
 502                         tny_iterator_next (iter);
 503                 }
 504                 g_object_unref (iter);
 505                 g_object_unref (parts);
 506                 if (related_part) {
 507                         TnyMimePart *result;
 508                         result = find_body_parent (related_part);
 509                         g_object_unref (related_part);
 510                         return result;
 511                 } else if (alternative_part)
 512                         return alternative_part;
 513                 else
 514                         return g_object_ref (part);
 515         } else
 516                 return NULL;
 517 }
 518
 519 TnyMimePart *
 520 modest_formatter_create_body_part (ModestFormatter *self, TnyMsg *msg)
 521 {
 522         TnyMimePart *result = NULL;
 523         TnyPlatformFactory *fact = NULL;
 524         TnyMimePart *parent = NULL;
 525
 526         parent = find_body_parent (TNY_MIME_PART (msg));
 527         fact = modest_runtime_get_platform_factory ();
 528         if (parent != NULL) {
 529                 result = tny_platform_factory_new_mime_part (fact);
 530                 tny_mime_part_add_part (TNY_MIME_PART (parent), result);
 531                 g_object_unref (parent);
 532         } else {
 533                 result = g_object_ref (msg);
 534         }
 535
 536         return result;
 537
 538 }