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 (620f6a96cee5)

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
/* -*- 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/. */

#include "msgCore.h"
#include "nsIMsgAccountManager.h"
#include "nsMsgFolderCacheElement.h"
#include "nsMsgFolderCache.h"
#include "nsMorkCID.h"
#include "nsIMdbFactoryFactory.h"
#include "nsMsgBaseCID.h"
#include "nsServiceManagerUtils.h"

const char *kFoldersScope = "ns:msg:db:row:scope:folders:all";	// scope for all folders table
const char *kFoldersTableKind = "ns:msg:db:table:kind:folders";

nsMsgFolderCache::nsMsgFolderCache()
{
  m_mdbEnv = nullptr;
  m_mdbStore = nullptr;
  m_mdbAllFoldersTable = nullptr;
}

// should this, could this be an nsCOMPtr ?
static nsIMdbFactory *gMDBFactory = nullptr;

nsMsgFolderCache::~nsMsgFolderCache()
{
  m_cacheElements.Clear(); // make sure the folder cache elements are released before we release our m_mdb objects...
  if (m_mdbAllFoldersTable)
    m_mdbAllFoldersTable->Release();
  if (m_mdbStore)
    m_mdbStore->Release();
  NS_IF_RELEASE(gMDBFactory);
  if (m_mdbEnv)
    m_mdbEnv->Release();
}


NS_IMPL_ISUPPORTS(nsMsgFolderCache, nsIMsgFolderCache)

void nsMsgFolderCache::GetMDBFactory(nsIMdbFactory ** aMdbFactory)
{
  if (!mMdbFactory)
  {
    nsresult rv;
    nsCOMPtr <nsIMdbFactoryService> mdbFactoryService = do_GetService(NS_MORK_CONTRACTID, &rv);
    if (NS_SUCCEEDED(rv) && mdbFactoryService)
      rv = mdbFactoryService->GetMdbFactory(getter_AddRefs(mMdbFactory));
  }
  NS_IF_ADDREF(*aMdbFactory = mMdbFactory);
}

// initialize the various tokens and tables in our db's env
nsresult nsMsgFolderCache::InitMDBInfo()
{
  nsresult err = NS_OK;
  if (GetStore())
  {
    err = GetStore()->StringToToken(GetEnv(), kFoldersScope, &m_folderRowScopeToken);
    if (NS_SUCCEEDED(err))
    {
      err = GetStore()->StringToToken(GetEnv(), kFoldersTableKind, &m_folderTableKindToken);
      if (NS_SUCCEEDED(err))
      {
        // The table of all message hdrs will have table id 1.
        m_allFoldersTableOID.mOid_Scope = m_folderRowScopeToken;
        m_allFoldersTableOID.mOid_Id = 1;
      }
    }
  }
  return err;
}

// set up empty tables, dbFolderInfo, etc.
nsresult nsMsgFolderCache::InitNewDB()
{
  nsresult err = InitMDBInfo();
  if (NS_SUCCEEDED(err))
  {
    nsIMdbStore *store = GetStore();
    // create the unique table for the dbFolderInfo.
    // TODO: this error assignment is suspicious and never checked.
    (void) store->NewTable(GetEnv(), m_folderRowScopeToken, m_folderTableKindToken,
                           false, nullptr, &m_mdbAllFoldersTable);
  }
  return err;
}

nsresult nsMsgFolderCache::InitExistingDB()
{
  nsresult err = InitMDBInfo();
  if (NS_FAILED(err))
    return err;

  err = GetStore()->GetTable(GetEnv(), &m_allFoldersTableOID, &m_mdbAllFoldersTable);
  if (NS_SUCCEEDED(err) && m_mdbAllFoldersTable)
  {
    nsIMdbTableRowCursor* rowCursor = nullptr;
    err = m_mdbAllFoldersTable->GetTableRowCursor(GetEnv(), -1, &rowCursor);
    if (NS_SUCCEEDED(err) && rowCursor)
    {
      // iterate over the table rows and create nsMsgFolderCacheElements for each.
      while (true)
      {
        nsresult rv;
        nsIMdbRow* hdrRow;
        mdb_pos rowPos;

        rv = rowCursor->NextRow(GetEnv(), &hdrRow, &rowPos);
        if (NS_FAILED(rv) || !hdrRow)
          break;

        rv = AddCacheElement(EmptyCString(), hdrRow, nullptr);
        hdrRow->Release();
        if (NS_FAILED(rv))
          return rv;
      }
      rowCursor->Release();
    }
  }
  else
    err = NS_ERROR_FAILURE;

  return err;
}

nsresult nsMsgFolderCache::OpenMDB(const nsACString& dbName, bool exists)
{
  nsresult ret=NS_OK;
  nsCOMPtr<nsIMdbFactory> mdbFactory;
  GetMDBFactory(getter_AddRefs(mdbFactory));
  if (mdbFactory)
  {
    ret = mdbFactory->MakeEnv(nullptr, &m_mdbEnv);
    if (NS_SUCCEEDED(ret))
    {
      nsIMdbThumb *thumb = nullptr;
      nsIMdbHeap* dbHeap = nullptr;

      if (m_mdbEnv)
        m_mdbEnv->SetAutoClear(true);
      if (exists)
      {
        mdbOpenPolicy inOpenPolicy;
        mdb_bool canOpen;
        mdbYarn outFormatVersion;

        nsIMdbFile* oldFile = nullptr;
        ret = mdbFactory->OpenOldFile(m_mdbEnv, dbHeap, nsCString(dbName).get(),
                                      mdbBool_kFalse, // not readonly, we want modifiable
                                      &oldFile);
        if ( oldFile )
        {
          if (NS_SUCCEEDED(ret))
          {
            ret = mdbFactory->CanOpenFilePort(m_mdbEnv, oldFile, // file to investigate
              &canOpen, &outFormatVersion);
            if (NS_SUCCEEDED(ret) && canOpen)
            {
              inOpenPolicy.mOpenPolicy_ScopePlan.mScopeStringSet_Count = 0;
              inOpenPolicy.mOpenPolicy_MinMemory = 0;
              inOpenPolicy.mOpenPolicy_MaxLazy = 0;

              ret = mdbFactory->OpenFileStore(m_mdbEnv, NULL, oldFile, &inOpenPolicy,
                &thumb);
            }
            else
              ret = NS_MSG_ERROR_FOLDER_SUMMARY_OUT_OF_DATE;
          }
          NS_RELEASE(oldFile); // always release our file ref, store has own
        }
      }
      if (NS_SUCCEEDED(ret) && thumb)
      {
        mdb_count outTotal;    // total somethings to do in operation
        mdb_count outCurrent;  // subportion of total completed so far
        mdb_bool outDone = false;      // is operation finished?
        mdb_bool outBroken;     // is operation irreparably dead and broken?
        do
        {
          ret = thumb->DoMore(m_mdbEnv, &outTotal, &outCurrent, &outDone, &outBroken);
          if (NS_FAILED(ret))
          {
            outDone = true;
            break;
          }
        }
        while (NS_SUCCEEDED(ret) && !outBroken && !outDone);
        // m_mdbEnv->ClearErrors(); // ### temporary...
        if (NS_SUCCEEDED(ret) && outDone)
        {
          ret = mdbFactory->ThumbToOpenStore(m_mdbEnv, thumb, &m_mdbStore);
          if (NS_SUCCEEDED(ret) && m_mdbStore)
            ret = InitExistingDB();
        }
#ifdef DEBUG_bienvenu1
        DumpContents();
#endif
      }
      else // ### need error code saying why open file store failed
      {
        nsIMdbFile* newFile = 0;
        ret = mdbFactory->CreateNewFile(m_mdbEnv, dbHeap, nsCString(dbName).get(), &newFile);
        if ( newFile )
        {
          if (NS_SUCCEEDED(ret))
          {
            mdbOpenPolicy inOpenPolicy;

            inOpenPolicy.mOpenPolicy_ScopePlan.mScopeStringSet_Count = 0;
            inOpenPolicy.mOpenPolicy_MinMemory = 0;
            inOpenPolicy.mOpenPolicy_MaxLazy = 0;

            ret = mdbFactory->CreateNewFileStore(m_mdbEnv, dbHeap,
              newFile, &inOpenPolicy, &m_mdbStore);
            if (NS_SUCCEEDED(ret))
              ret = InitNewDB();
          }
          NS_RELEASE(newFile); // always release our file ref, store has own
        }

      }
      NS_IF_RELEASE(thumb);
    }
  }
  return ret;
}

NS_IMETHODIMP nsMsgFolderCache::Init(nsIFile *aFile)
{
  NS_ENSURE_ARG_POINTER(aFile);

  bool exists;
  aFile->Exists(&exists);

  nsAutoCString dbPath;
  aFile->GetNativePath(dbPath);
  // ### evil cast until MDB supports file streams.
  nsresult rv = OpenMDB(dbPath, exists);
  // if this fails and panacea.dat exists, try blowing away the db and recreating it
  if (NS_FAILED(rv) && exists)
  {
    if (m_mdbStore)
      m_mdbStore->Release();
    aFile->Remove(false);
    rv = OpenMDB(dbPath, false);
  }
  return rv;
}

NS_IMETHODIMP nsMsgFolderCache::GetCacheElement(const nsACString& pathKey, bool createIfMissing,
                                                nsIMsgFolderCacheElement **result)
{
  NS_ENSURE_ARG_POINTER(result);
  NS_ENSURE_TRUE(!pathKey.IsEmpty(), NS_ERROR_FAILURE);

  nsCOMPtr<nsIMsgFolderCacheElement> folderCacheEl;
  m_cacheElements.Get(pathKey, getter_AddRefs(folderCacheEl));
  folderCacheEl.swap(*result);

  if (*result)
    return NS_OK;
  else if (createIfMissing)
  {
    nsIMdbRow* hdrRow;

    if (GetStore())
    {
      nsresult err = GetStore()->NewRow(GetEnv(), m_folderRowScopeToken, // row scope for row ids
        &hdrRow);
      if (NS_SUCCEEDED(err) && hdrRow)
      {
        m_mdbAllFoldersTable->AddRow(GetEnv(), hdrRow);
        nsresult ret = AddCacheElement(pathKey, hdrRow, result);
        if (*result)
          (*result)->SetStringProperty("key", pathKey);
        hdrRow->Release();
        return ret;
      }
    }
  }
  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP nsMsgFolderCache::RemoveElement(const nsACString& key)
{
  nsCOMPtr<nsIMsgFolderCacheElement> folderCacheEl;
  m_cacheElements.Get(key, getter_AddRefs(folderCacheEl));
  if (!folderCacheEl)
    return NS_ERROR_FAILURE;
  nsMsgFolderCacheElement *element = static_cast<nsMsgFolderCacheElement *>(static_cast<nsISupports *>(folderCacheEl.get())); // why the double cast??
  m_mdbAllFoldersTable->CutRow(GetEnv(), element->m_mdbRow);
  m_cacheElements.Remove(key);
  return NS_OK;
}

NS_IMETHODIMP nsMsgFolderCache::Clear()
{
  m_cacheElements.Clear();
  if (m_mdbAllFoldersTable)
    m_mdbAllFoldersTable->CutAllRows(GetEnv());
  return NS_OK;
}

NS_IMETHODIMP nsMsgFolderCache::Close()
{
  return Commit(true);
}

NS_IMETHODIMP nsMsgFolderCache::Commit(bool compress)
{
  nsresult ret = NS_OK;
  nsIMdbThumb *commitThumb = nullptr;
  if (m_mdbStore)
  {
    if (compress)
      ret = m_mdbStore->CompressCommit(GetEnv(), &commitThumb);
    else
      ret = m_mdbStore->LargeCommit(GetEnv(), &commitThumb);
  }

  if (commitThumb)
  {
    mdb_count outTotal = 0;    // total somethings to do in operation
    mdb_count outCurrent = 0;  // subportion of total completed so far
    mdb_bool outDone = false;      // is operation finished?
    mdb_bool outBroken = false;     // is operation irreparably dead and broken?
    while (!outDone && !outBroken && NS_SUCCEEDED(ret))
      ret = commitThumb->DoMore(GetEnv(), &outTotal, &outCurrent, &outDone, &outBroken);
    NS_IF_RELEASE(commitThumb);
  }
  // ### do something with error, but clear it now because mork errors out on commits.
  if (GetEnv())
    GetEnv()->ClearErrors();
  return ret;
}

nsresult nsMsgFolderCache::AddCacheElement(const nsACString& key, nsIMdbRow *row, nsIMsgFolderCacheElement **result)
{
  nsMsgFolderCacheElement *cacheElement = new nsMsgFolderCacheElement;
  NS_ENSURE_TRUE(cacheElement, NS_ERROR_OUT_OF_MEMORY);
  nsCOMPtr<nsIMsgFolderCacheElement> folderCacheEl(do_QueryInterface(cacheElement));

  cacheElement->SetMDBRow(row);
  cacheElement->SetOwningCache(this);
  nsCString hashStrKey(key);
  // if caller didn't pass in key, try to get it from row.
  if (key.IsEmpty())
    folderCacheEl->GetStringProperty("key", hashStrKey);
  folderCacheEl->SetKey(hashStrKey);
  m_cacheElements.Put(hashStrKey, folderCacheEl);
  if (result)
    folderCacheEl.swap(*result);
  return NS_OK;
}

nsresult nsMsgFolderCache::RowCellColumnToCharPtr(nsIMdbRow *hdrRow, mdb_token columnToken, nsACString& resultStr)
{
  nsresult err = NS_OK;
  nsIMdbCell *hdrCell;
  if (hdrRow) // ### probably should be an error if hdrRow is NULL...
  {
    err = hdrRow->GetCell(GetEnv(), columnToken, &hdrCell);
    if (NS_SUCCEEDED(err) && hdrCell)
    {
      struct mdbYarn yarn;
      hdrCell->AliasYarn(GetEnv(), &yarn);
      resultStr.Assign((const char *)yarn.mYarn_Buf, yarn.mYarn_Fill);
      resultStr.SetLength(yarn.mYarn_Fill); // ensure the string is null terminated.
      hdrCell->Release(); // always release ref
    }
  }
  return err;
}