releases-comm-central/mailnews/db/mork/morkRowCellCursor.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-  */
/* 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/. */

#ifndef _MDB_
#  include "mdb.h"
#endif

#ifndef _MORK_
#  include "mork.h"
#endif

#ifndef _MORKNODE_
#  include "morkNode.h"
#endif

#ifndef _MORKENV_
#  include "morkEnv.h"
#endif

#ifndef _MORKCURSOR_
#  include "morkCursor.h"
#endif

#ifndef _MORKROWCELLCURSOR_
#  include "morkRowCellCursor.h"
#endif

#ifndef _MORKSTORE_
#  include "morkStore.h"
#endif

#ifndef _MORKROWOBJECT_
#  include "morkRowObject.h"
#endif

#ifndef _MORKROW_
#  include "morkRow.h"
#endif

// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789

// ````` ````` ````` ````` `````
// { ===== begin morkNode interface =====

/*public virtual*/ void morkRowCellCursor::CloseMorkNode(
    morkEnv* ev)  // CloseRowCellCursor() only if open
{
  if (this->IsOpenNode()) {
    this->MarkClosing();
    this->CloseRowCellCursor(ev);
    this->MarkShut();
  }
}

/*public virtual*/
morkRowCellCursor::~morkRowCellCursor()  // CloseRowCellCursor() executed
                                         // earlier
{
  CloseMorkNode(mMorkEnv);
  MORK_ASSERT(this->IsShutNode());
}

/*public non-poly*/
morkRowCellCursor::morkRowCellCursor(morkEnv* ev, const morkUsage& inUsage,
                                     nsIMdbHeap* ioHeap,
                                     morkRowObject* ioRowObject)
    : morkCursor(ev, inUsage, ioHeap),
      mRowCellCursor_RowObject(0),
      mRowCellCursor_Col(0) {
  if (ev->Good()) {
    if (ioRowObject) {
      morkRow* row = ioRowObject->mRowObject_Row;
      if (row) {
        if (row->IsRow()) {
          mCursor_Pos = -1;
          mCursor_Seed = row->mRow_Seed;

          morkRowObject::SlotStrongRowObject(ioRowObject, ev,
                                             &mRowCellCursor_RowObject);
          if (ev->Good()) mNode_Derived = morkDerived_kRowCellCursor;
        } else
          row->NonRowTypeError(ev);
      } else
        ioRowObject->NilRowError(ev);
    } else
      ev->NilPointerError();
  }
}

NS_IMPL_ISUPPORTS_INHERITED(morkRowCellCursor, morkCursor, nsIMdbRowCellCursor)

/*public non-poly*/ void morkRowCellCursor::CloseRowCellCursor(morkEnv* ev) {
  if (this->IsNode()) {
    mCursor_Pos = -1;
    mCursor_Seed = 0;
    morkRowObject::SlotStrongRowObject((morkRowObject*)0, ev,
                                       &mRowCellCursor_RowObject);
    this->CloseCursor(ev);
    this->MarkShut();
  } else
    this->NonNodeError(ev);
}

// } ===== end morkNode methods =====
// ````` ````` ````` ````` `````

/*static*/ void morkRowCellCursor::NilRowObjectError(morkEnv* ev) {
  ev->NewError("nil mRowCellCursor_RowObject");
}

/*static*/ void morkRowCellCursor::NonRowCellCursorTypeError(morkEnv* ev) {
  ev->NewError("non morkRowCellCursor");
}

// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
// { ----- begin attribute methods -----
NS_IMETHODIMP
morkRowCellCursor::SetRow(nsIMdbEnv* mev, nsIMdbRow* ioRow) {
  nsresult outErr = NS_OK;
  morkRow* row = 0;
  morkEnv* ev = morkEnv::FromMdbEnv(mev);
  if (ev) {
    row = (morkRow*)ioRow;
    morkStore* store = row->GetRowSpaceStore(ev);
    if (store) {
      morkRowObject* rowObj = row->AcquireRowObject(ev, store);
      if (rowObj) {
        morkRowObject::SlotStrongRowObject((morkRowObject*)0, ev,
                                           &mRowCellCursor_RowObject);

        mRowCellCursor_RowObject = rowObj;  // take this strong ref
        mCursor_Seed = row->mRow_Seed;

        row->GetCell(ev, mRowCellCursor_Col, &mCursor_Pos);
      }
    }
    outErr = ev->AsErr();
  }
  return outErr;
}

NS_IMETHODIMP
morkRowCellCursor::GetRow(nsIMdbEnv* mev, nsIMdbRow** acqRow) {
  nsresult outErr = NS_OK;
  nsIMdbRow* outRow = 0;
  morkEnv* ev = morkEnv::FromMdbEnv(mev);
  if (ev) {
    morkRowObject* rowObj = mRowCellCursor_RowObject;
    if (rowObj) outRow = rowObj->AcquireRowHandle(ev);

    outErr = ev->AsErr();
  }
  if (acqRow) *acqRow = outRow;
  return outErr;
}
// } ----- end attribute methods -----

// { ----- begin cell seeking methods -----
NS_IMETHODIMP
morkRowCellCursor::SeekCell(
    nsIMdbEnv* mev,         // context
    mdb_pos inPos,          // position of cell in row sequence
    mdb_column* outColumn,  // column for this particular cell
    nsIMdbCell** acqCell) {
  NS_ASSERTION(false, "not implemented");
  return NS_ERROR_NOT_IMPLEMENTED;
}
// } ----- end cell seeking methods -----

// { ----- begin cell iteration methods -----
NS_IMETHODIMP
morkRowCellCursor::NextCell(  // get next cell in the row
    nsIMdbEnv* mev,           // context
    nsIMdbCell** acqCell,     // changes to the next cell in the iteration
    mdb_column* outColumn,    // column for this particular cell
    mdb_pos* outPos) {
  morkEnv* ev = morkEnv::FromMdbEnv(mev);
  mdb_column col = 0;
  mdb_pos pos = mRowCellCursor_Col;
  if (pos < 0)
    pos = 0;
  else
    ++pos;

  morkCell* cell = mRowCellCursor_RowObject->mRowObject_Row->CellAt(ev, pos);
  if (cell) {
    col = cell->GetColumn();
    *acqCell = mRowCellCursor_RowObject->mRowObject_Row->AcquireCellHandle(
        ev, cell, col, pos);
  } else {
    *acqCell = nullptr;
    pos = -1;
  }
  if (outPos) *outPos = pos;
  if (outColumn) *outColumn = col;

  mRowCellCursor_Col = pos;
  return NS_OK;
}

NS_IMETHODIMP
morkRowCellCursor::PickNextCell(  // get next cell in row within filter set
    nsIMdbEnv* mev,               // context
    nsIMdbCell* ioCell,           // changes to the next cell in the iteration
    const mdbColumnSet* inFilterSet,  // col set of actual caller interest
    mdb_column* outColumn,            // column for this particular cell
    mdb_pos* outPos)
// Note that inFilterSet should not have too many (many more than 10?)
// cols, since this might imply a potential excessive consumption of time
// over many cursor calls when looking for column and filter intersection.
{
  NS_ASSERTION(false, "not implemented");
  return NS_ERROR_NOT_IMPLEMENTED;
}

// } ----- end cell iteration methods -----

// } ===== end nsIMdbRowCellCursor methods =====