C++ ContentParent::SendAddPermission方法代码示例

nsresult
nsPermissionManager::AddInternal(const nsAFlatCString &aHost,
                                 const nsAFlatCString &aType,
                                 PRUint32              aPermission,
                                 PRInt64               aID,
                                 PRUint32              aExpireType,
                                 PRInt64               aExpireTime,
                                 NotifyOperationType   aNotifyOperation,
                                 DBOperationType       aDBOperation)
{
  if (!IsChildProcess()) {
    IPC::Permission permission((aHost),
                               (aType),
                               aPermission, aExpireType, aExpireTime);

    nsTArray<ContentParent*> cplist;
    ContentParent::GetAll(cplist);
    for (PRUint32 i = 0; i < cplist.Length(); ++i) {
      ContentParent* cp = cplist[i];
      if (cp->NeedsPermissionsUpdate())
        unused << cp->SendAddPermission(permission);
    }
  }

  if (!gHostArena) {
    gHostArena = new PLArenaPool;
    if (!gHostArena)
      return NS_ERROR_OUT_OF_MEMORY;    
    PL_INIT_ARENA_POOL(gHostArena, "PermissionHostArena", HOST_ARENA_SIZE);
  }

  // look up the type index
  PRInt32 typeIndex = GetTypeIndex(aType.get(), true);
  NS_ENSURE_TRUE(typeIndex != -1, NS_ERROR_OUT_OF_MEMORY);

  // When an entry already exists, PutEntry will return that, instead
  // of adding a new one
  nsHostEntry *entry = mHostTable.PutEntry(aHost.get());
  if (!entry) return NS_ERROR_FAILURE;
  if (!entry->GetKey()) {
    mHostTable.RawRemoveEntry(entry);
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // figure out the transaction type, and get any existing permission value
  OperationType op;
  PRInt32 index = entry->GetPermissionIndex(typeIndex);
  if (index == -1) {
    if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationNone;
    else
      op = eOperationAdding;

  } else {
    nsPermissionEntry oldPermissionEntry = entry->GetPermissions()[index];

    // remove the permission if the permission is UNKNOWN, update the
    // permission if its value or expire type have changed OR if the time has
    // changed and the expire type is time, otherwise, don't modify.  There's
    // no need to modify a permission that doesn't expire with time when the
    // only thing changed is the expire time.
    if (aPermission == oldPermissionEntry.mPermission && 
        aExpireType == oldPermissionEntry.mExpireType &&
        (aExpireType != nsIPermissionManager::EXPIRE_TIME || 
         aExpireTime == oldPermissionEntry.mExpireTime))
      op = eOperationNone;
    else if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationRemoving;
    else
      op = eOperationChanging;
  }

  // do the work for adding, deleting, or changing a permission:
  // update the in-memory list, write to the db, and notify consumers.
  PRInt64 id;
  switch (op) {
  case eOperationNone:
    {
      // nothing to do
      return NS_OK;
    }

  case eOperationAdding:
    {
      if (aDBOperation == eWriteToDB) {
        // we'll be writing to the database - generate a known unique id
        id = ++mLargestID;
      } else {
        // we're reading from the database - use the id already assigned
        id = aID;
      }

      entry->GetPermissions().AppendElement(nsPermissionEntry(typeIndex, aPermission, id, aExpireType, aExpireTime));

      if (aDBOperation == eWriteToDB && aExpireType != nsIPermissionManager::EXPIRE_SESSION)
        UpdateDB(op, mStmtInsert, id, aHost, aType, aPermission, aExpireType, aExpireTime);

      if (aNotifyOperation == eNotify) {
        NotifyObserversWithPermission(aHost,
                                      mTypeArray[typeIndex],
//.........这里部分代码省略.........