DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (af5845922999)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * This Original Code has been modified by IBM Corporation. Modifications made by IBM
 * described herein are Copyright (c) International Business Machines Corporation, 2000.
 * Modifications to Mozilla code or documentation identified per MPL Section 3.3
 *
 * Date             Modified by     Description of modification
 * 04/20/2000       IBM Corp.      OS/2 VisualAge build.
 */
#include "mimetext.h"
#include "mimebuf.h"
#include "mimethtm.h"
#include "comi18n.h"
#include "mimemoz2.h"

#include "prlog.h"
#include "prmem.h"
#include "plstr.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIServiceManager.h"
#include "nsIPrefLocalizedString.h"
#include "nsMsgUtils.h"
#include "nsMimeTypes.h"
#include "nsServiceManagerUtils.h"

#define MIME_SUPERCLASS mimeLeafClass
MimeDefClass(MimeInlineText, MimeInlineTextClass, mimeInlineTextClass,
       &MIME_SUPERCLASS);

static int MimeInlineText_initialize (MimeObject *);
static void MimeInlineText_finalize (MimeObject *);
static int MimeInlineText_rot13_line (MimeObject *, char *line, int32_t length);
static int MimeInlineText_parse_eof (MimeObject *obj, bool abort_p);
static int MimeInlineText_parse_end  (MimeObject *, bool);
static int MimeInlineText_parse_decoded_buffer (const char *, int32_t, MimeObject *);
static int MimeInlineText_rotate_convert_and_parse_line(char *, int32_t,
                 MimeObject *);
static int MimeInlineText_open_dam(char *line, int32_t length, MimeObject *obj);
static int MimeInlineText_initializeCharset(MimeObject *obj);

static int
MimeInlineTextClassInitialize(MimeInlineTextClass *clazz)
{
  MimeObjectClass *oclass = (MimeObjectClass *) clazz;
  MimeLeafClass   *lclass = (MimeLeafClass *) clazz;
  PR_ASSERT(!oclass->class_initialized);
  oclass->initialize           = MimeInlineText_initialize;
  oclass->finalize             = MimeInlineText_finalize;
  oclass->parse_eof            = MimeInlineText_parse_eof;
  oclass->parse_end            = MimeInlineText_parse_end;
  clazz->rot13_line            = MimeInlineText_rot13_line;
  clazz->initialize_charset    =  MimeInlineText_initializeCharset;
  lclass->parse_decoded_buffer = MimeInlineText_parse_decoded_buffer;
  return 0;
}

static int
MimeInlineText_initialize (MimeObject *obj)
{
  /* This is an abstract class; it shouldn't be directly instantiated. */
  PR_ASSERT(obj->clazz != (MimeObjectClass *) &mimeInlineTextClass);

  ((MimeInlineText *) obj)->initializeCharset = false;
  ((MimeInlineText *) obj)->needUpdateMsgWinCharset = false;
  return ((MimeObjectClass*)&MIME_SUPERCLASS)->initialize(obj);
}

static int MimeInlineText_initializeCharset(MimeObject *obj)
{
  MimeInlineText  *text = (MimeInlineText *) obj;

  text->inputAutodetect = false;
  text->charsetOverridable = false;

  /* Figure out an appropriate charset for this object.
  */
  if (!text->charset && obj->headers)
  {
    if (obj->options && obj->options->override_charset)
    {
      text->charset = strdup(obj->options->default_charset);
    }
    else
    {
      char *ct = MimeHeaders_get (obj->headers, HEADER_CONTENT_TYPE,
                                  false, false);
      if (ct)
      {
        text->charset = MimeHeaders_get_parameter (ct, "charset", NULL, NULL);
        PR_Free(ct);
      }

      if (!text->charset)
      {
        /* If we didn't find "Content-Type: ...; charset=XX" then look
           for "X-Sun-Charset: XX" instead.  (Maybe this should be done
           in MimeSunAttachmentClass, but it's harder there than here.)
         */
        text->charset = MimeHeaders_get (obj->headers,
                                          HEADER_X_SUN_CHARSET,
                                          false, false);
      }

      /* iMIP entities without an explicit charset parameter default to
       US-ASCII (RFC 2447, section 2.4). However, Microsoft Outlook generates
       UTF-8 but omits the charset parameter.
       When no charset is defined by the container (e.g. iMIP), iCalendar
       files default to UTF-8 (RFC 2445, section 4.1.4).
       */
      if (!text->charset &&
          obj->content_type &&
          !PL_strcasecmp(obj->content_type, TEXT_CALENDAR))
        text->charset = strdup("UTF-8");

      if (!text->charset)
      {
        nsresult res;

        text->charsetOverridable = true;

        nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID, &res));
        if (NS_SUCCEEDED(res))
        {
          nsCOMPtr<nsIPrefLocalizedString> str;
          if (NS_SUCCEEDED(prefBranch->GetComplexValue("intl.charset.detector", NS_GET_IID(nsIPrefLocalizedString), getter_AddRefs(str)))) {
            //only if we can get autodetector name correctly, do we set this to true
            text->inputAutodetect = true;
          }
        }

        if (obj->options && obj->options->default_charset)
          text->charset = strdup(obj->options->default_charset);
        else
        {
          if (NS_SUCCEEDED(res))
          {
            nsString value;
            NS_GetLocalizedUnicharPreferenceWithDefault(prefBranch, "mailnews.view_default_charset", EmptyString(), value);
            text->charset = ToNewUTF8String(value);
          }
          else
            text->charset = strdup("");
        }
      }
    }
  }

  if (text->inputAutodetect)
  {
    //we need to prepare lineDam for charset detection
    text->lineDamBuffer = (char*)PR_Malloc(DAM_MAX_BUFFER_SIZE);
    text->lineDamPtrs = (char**)PR_Malloc(DAM_MAX_LINES*sizeof(char*));
    text->curDamOffset = 0;
    text->lastLineInDam = 0;
    if (!text->lineDamBuffer || !text->lineDamPtrs)
    {
      text->inputAutodetect = false;
      PR_FREEIF(text->lineDamBuffer);
      PR_FREEIF(text->lineDamPtrs);
    }
  }

  text->initializeCharset = true;

  return 0;
}

static void
MimeInlineText_finalize (MimeObject *obj)
{
  MimeInlineText *text = (MimeInlineText *) obj;

  obj->clazz->parse_eof (obj, false);
  obj->clazz->parse_end (obj, false);

  PR_FREEIF(text->charset);

  /* Should have been freed by parse_eof, but just in case... */
  PR_ASSERT(!text->cbuffer);
  PR_FREEIF (text->cbuffer);

  if (text->inputAutodetect) {
    PR_FREEIF(text->lineDamBuffer);
    PR_FREEIF(text->lineDamPtrs);
    text->inputAutodetect = false;
  }

  ((MimeObjectClass*)&MIME_SUPERCLASS)->finalize (obj);
}


static int
MimeInlineText_parse_eof (MimeObject *obj, bool abort_p)
{
  int status;

  if (obj->closed_p) return 0;
  NS_ASSERTION(!obj->parsed_p, "obj already parsed");

  MimeInlineText *text = (MimeInlineText *) obj;

  /* Flush any buffered data from the MimeLeaf's decoder */
  status = ((MimeLeafClass*)&MIME_SUPERCLASS)->close_decoder(obj);
  if (status < 0) return status;

  /* If there is still data in the ibuffer, that means that the last
   line of this part didn't end in a newline; so push it out anyway
   (this means that the parse_line method will be called with a string
   with no trailing newline, which isn't the usual case).  We do this
   here, rather than in MimeObject_parse_eof, because MimeObject isn't
   aware of the rotating-and-converting / charset detection we need to
   do first.
  */
  if (!abort_p && obj->ibuffer_fp > 0)
  {
    status = MimeInlineText_rotate_convert_and_parse_line (obj->ibuffer,
                                                           obj->ibuffer_fp,
                                                           obj);
    obj->ibuffer_fp = 0;
    if (status < 0)
    {
      //we haven't find charset yet? Do it before return
      if (text->inputAutodetect)
        status = MimeInlineText_open_dam(nullptr, 0, obj);

      obj->closed_p = true;
      return status;
    }
  }

  //we haven't find charset yet? now its the time
  if (text->inputAutodetect)
     status = MimeInlineText_open_dam(nullptr, 0, obj);

  return ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_eof (obj, abort_p);
}

static int
MimeInlineText_parse_end (MimeObject *obj, bool abort_p)
{
  MimeInlineText *text = (MimeInlineText *) obj;

  if (obj->parsed_p)
  {
    PR_ASSERT(obj->closed_p);
    return 0;
  }

  /* We won't be needing this buffer any more; nuke it. */
  PR_FREEIF(text->cbuffer);
  text->cbuffer_size = 0;

  return ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_end (obj, abort_p);
}


/* This maps A-M to N-Z and N-Z to A-M.  All other characters are left alone.
   (Comments in GNUS imply that for Japanese, one should rotate by 47?)
 */
static const unsigned char MimeInlineText_rot13_table[256] = {
  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
  21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
  40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58,
  59, 60, 61, 62, 63, 64, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90,
  65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 91, 92, 93, 94, 95, 96,
  110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 97, 98,
  99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 123, 124, 125, 126,
  127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
  142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156,
  157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171,
  172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186,
  187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201,
  202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216,
  217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231,
  232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246,
  247, 248, 249, 250, 251, 252, 253, 254, 255 };

static int
MimeInlineText_rot13_line (MimeObject *obj, char *line, int32_t length)
{
  unsigned char *s, *end;
  PR_ASSERT(line);
  if (!line) return -1;
  s = (unsigned char *) line;
  end = s + length;
  while (s < end)
  {
    *s = MimeInlineText_rot13_table[*s];
    s++;
  }
  return 0;
}


static int
MimeInlineText_parse_decoded_buffer (const char *buf, int32_t size, MimeObject *obj)
{
  PR_ASSERT(!obj->closed_p);
  if (obj->closed_p) return -1;

  /* MimeLeaf takes care of this. */
  PR_ASSERT(obj->output_p && obj->options && obj->options->output_fn);
  if (!obj->options) return -1;

  /* If we're supposed to write this object, but aren't supposed to convert
   it to HTML, simply pass it through unaltered. */
  if (!obj->options->write_html_p && obj->options->format_out != nsMimeOutput::nsMimeMessageAttach)
  return MimeObject_write(obj, buf, size, true);

  /* This is just like the parse_decoded_buffer method we inherit from the
   MimeLeaf class, except that we line-buffer to our own wrapper on the
   `parse_line' method instead of calling the `parse_line' method directly.
   */
  return mime_LineBuffer (buf, size,
             &obj->ibuffer, &obj->ibuffer_size, &obj->ibuffer_fp,
             true,
             ((int (*) (char *, int32_t, void *))
              /* This cast is to turn void into MimeObject */
              MimeInlineText_rotate_convert_and_parse_line),
             obj);
}


#define MimeInlineText_grow_cbuffer(text, desired_size) \
  (((desired_size) >= (text)->cbuffer_size) ? \
   mime_GrowBuffer ((desired_size), sizeof(char), 100, \
           &(text)->cbuffer, &(text)->cbuffer_size) \
   : 0)

static int
MimeInlineText_convert_and_parse_line(char *line, int32_t length, MimeObject *obj)
{
  int status;
  nsAutoCString converted;

  MimeInlineText *text = (MimeInlineText *) obj;

  //in case of charset autodetection, charset can be override by meta charset
  if (text->charsetOverridable) {
    if (mime_typep(obj, (MimeObjectClass *) &mimeInlineTextHTMLClass))
    {
      MimeInlineTextHTML  *textHTML = (MimeInlineTextHTML *) obj;
      if (textHTML->charset &&
          *textHTML->charset &&
          strcmp(textHTML->charset, text->charset))
      {
        //if meta tag specified charset is different from our detected result, use meta charset.
        //but we don't want to redo previous lines
        PR_FREEIF(text->charset);
        text->charset = strdup(textHTML->charset);

        //update MsgWindow charset if we are instructed to do so
        if (text->needUpdateMsgWinCharset && *text->charset)
          SetMailCharacterSetToMsgWindow(obj, text->charset);
      }
    }
  }

  status = obj->options->charset_conversion_fn(line, length,
                       text->charset,
                       converted,
                       obj->options->stream_closure);

  if (status == 0)
  {
    line = (char *) converted.get();
    length = converted.Length();
  }

  /* Now that the line has been converted, call the subclass's parse_line
   method with the decoded data. */
  status = obj->clazz->parse_line(line, length, obj);

  return status;
}

//In this function call, all buffered lines in lineDam will be sent to charset detector
// and a charset will be used to parse all those line and following lines in this mime obj.
static int
MimeInlineText_open_dam(char *line, int32_t length, MimeObject *obj)
{
  MimeInlineText *text = (MimeInlineText *) obj;
  const char* detectedCharset = nullptr;
  nsresult res = NS_OK;
  int status = 0;
  int32_t i;

  if (text->curDamOffset <= 0) {
    //there is nothing in dam, use current line for detection
    if (length > 0) {
      res = MIME_detect_charset(line, length, &detectedCharset);
    }
  } else {
    //we have stuff in dam, use the one
    res = MIME_detect_charset(text->lineDamBuffer, text->curDamOffset, &detectedCharset);
  }

  //set the charset for this obj
  if (NS_SUCCEEDED(res) && detectedCharset && *detectedCharset)  {
    PR_FREEIF(text->charset);
    text->charset = strdup(detectedCharset);

    //update MsgWindow charset if we are instructed to do so
    if (text->needUpdateMsgWinCharset && *text->charset)
      SetMailCharacterSetToMsgWindow(obj, text->charset);
  }

  //process dam and line using the charset
  if (text->curDamOffset) {
    for (i = 0; i < text->lastLineInDam-1; i++)
    {
      status = MimeInlineText_convert_and_parse_line(
                text->lineDamPtrs[i],
                text->lineDamPtrs[i+1] - text->lineDamPtrs[i],
                obj  );
    }
    status = MimeInlineText_convert_and_parse_line(
                text->lineDamPtrs[i],
                text->lineDamBuffer + text->curDamOffset - text->lineDamPtrs[i],
                obj );
  }

  if (length)
    status = MimeInlineText_convert_and_parse_line(line, length, obj);

  PR_Free(text->lineDamPtrs);
  PR_Free(text->lineDamBuffer);
  text->lineDamPtrs = nullptr;
  text->lineDamBuffer = nullptr;
  text->inputAutodetect = false;

  return status;
}


static int
MimeInlineText_rotate_convert_and_parse_line(char *line, int32_t length,
                       MimeObject *obj)
{
  int status = 0;
  MimeInlineTextClass *textc = (MimeInlineTextClass *) obj->clazz;

  PR_ASSERT(!obj->closed_p);
  if (obj->closed_p) return -1;

  /* Rotate the line, if desired (this happens on the raw data, before any
   charset conversion.) */
  if (obj->options && obj->options->rot13_p)
  {
    status = textc->rot13_line(obj, line, length);
    if (status < 0) return status;
  }

  // Now convert to the canonical charset, if desired.
  //
  bool    doConvert = true;
  // Don't convert vCard data
  if ( ( (obj->content_type) && (!PL_strcasecmp(obj->content_type, TEXT_VCARD)) ) ||
       (obj->options->format_out == nsMimeOutput::nsMimeMessageSaveAs)
       || obj->options->format_out == nsMimeOutput::nsMimeMessageAttach)
    doConvert = false;

  // Only convert if the user prefs is false
  if ( (obj->options && obj->options->charset_conversion_fn) &&
       (!obj->options->force_user_charset) &&
       (doConvert)
     )
  {
    MimeInlineText  *text = (MimeInlineText *) obj;

    if (!text->initializeCharset)
    {
      MimeInlineText_initializeCharset(obj);
      //update MsgWindow charset if we are instructed to do so
      if (text->needUpdateMsgWinCharset && *text->charset)
        SetMailCharacterSetToMsgWindow(obj, text->charset);
    }

    //if autodetect is on, push line to dam
    if (text->inputAutodetect)
    {
      //see if we reach the lineDam buffer limit, if so, there is no need to keep buffering
      if (text->lastLineInDam >= DAM_MAX_LINES ||
          DAM_MAX_BUFFER_SIZE - text->curDamOffset <= length) {
        //we let open dam process this line as well as thing that already in Dam
        //In case there is nothing in dam because this line is too big, we need to
        //perform autodetect on this line
        status = MimeInlineText_open_dam(line, length, obj);
      }
      else {
        //buffering current line
        text->lineDamPtrs[text->lastLineInDam] = text->lineDamBuffer + text->curDamOffset;
        memcpy(text->lineDamPtrs[text->lastLineInDam], line, length);
        text->lastLineInDam++;
        text->curDamOffset += length;
      }
    }
    else
      status = MimeInlineText_convert_and_parse_line(line, length, obj);
  }
  else
    status = obj->clazz->parse_line(line, length, obj);

  return status;
}