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206 lines
8.3 KiB
C++
206 lines
8.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _MORKCELLOBJECT_
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#define _MORKCELLOBJECT_ 1
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#ifndef _MORK_
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#include "mork.h"
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#endif
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#ifndef _MORKNODE_
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#include "morkNode.h"
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#endif
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#ifndef _MORKOBJECT_
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#include "morkObject.h"
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#endif
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//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
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#define morkDerived_kCellObject /*i*/ 0x634F /* ascii 'cO' */
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class morkCellObject : public morkObject, public nsIMdbCell { // blob attribute in column scope
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// public: // slots inherited from morkObject (meant to inform only)
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// nsIMdbHeap* mNode_Heap;
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// mork_able mNode_Mutable; // can this node be modified?
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// mork_load mNode_Load; // is this node clean or dirty?
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// mork_base mNode_Base; // must equal morkBase_kNode
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// mork_derived mNode_Derived; // depends on specific node subclass
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// mork_access mNode_Access; // kOpen, kClosing, kShut, or kDead
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// mork_usage mNode_Usage; // kHeap, kStack, kMember, kGlobal, kNone
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// mork_uses mNode_Uses; // refcount for strong refs
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// mork_refs mNode_Refs; // refcount for strong refs + weak refs
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// mork_color mBead_Color; // ID for this bead
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// morkHandle* mObject_Handle; // weak ref to handle for this object
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public: // state is public because the entire Mork system is private
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NS_DECL_ISUPPORTS_INHERITED
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morkRowObject* mCellObject_RowObject; // strong ref to row's object
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morkRow* mCellObject_Row; // cell's row if still in row object
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morkCell* mCellObject_Cell; // cell in row if rowseed matches
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mork_column mCellObject_Col; // col of cell last living in pos
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mork_u2 mCellObject_RowSeed; // copy of row's seed
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mork_u2 mCellObject_Pos; // position of cell in row
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// { ===== begin morkNode interface =====
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public: // morkNode virtual methods
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virtual void CloseMorkNode(morkEnv* ev); // CloseCellObject() only if open
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virtual ~morkCellObject(); // assert that CloseCellObject() executed earlier
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public: // morkCellObject construction & destruction
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morkCellObject(morkEnv* ev, const morkUsage& inUsage,
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nsIMdbHeap* ioHeap, morkRow* ioRow, morkCell* ioCell,
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mork_column inCol, mork_pos inPos);
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void CloseCellObject(morkEnv* ev); // called by CloseMorkNode();
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NS_IMETHOD SetBlob(nsIMdbEnv* ev,
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nsIMdbBlob* ioBlob); // reads inBlob slots
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// when inBlob is in the same suite, this might be fastest cell-to-cell
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NS_IMETHOD ClearBlob( // make empty (so content has zero length)
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nsIMdbEnv* ev);
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// clearing a yarn is like SetYarn() with empty yarn instance content
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NS_IMETHOD GetBlobFill(nsIMdbEnv* ev,
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mdb_fill* outFill); // size of blob
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// Same value that would be put into mYarn_Fill, if one called GetYarn()
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// with a yarn instance that had mYarn_Buf==nil and mYarn_Size==0.
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NS_IMETHOD SetYarn(nsIMdbEnv* ev,
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const mdbYarn* inYarn); // reads from yarn slots
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// make this text object contain content from the yarn's buffer
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NS_IMETHOD GetYarn(nsIMdbEnv* ev,
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mdbYarn* outYarn); // writes some yarn slots
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// copy content into the yarn buffer, and update mYarn_Fill and mYarn_Form
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NS_IMETHOD AliasYarn(nsIMdbEnv* ev,
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mdbYarn* outYarn); // writes ALL yarn slots
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NS_IMETHOD SetColumn(nsIMdbEnv* ev, mdb_column inColumn);
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NS_IMETHOD GetColumn(nsIMdbEnv* ev, mdb_column* outColumn);
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NS_IMETHOD GetCellInfo( // all cell metainfo except actual content
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nsIMdbEnv* ev,
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mdb_column* outColumn, // the column in the containing row
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mdb_fill* outBlobFill, // the size of text content in bytes
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mdbOid* outChildOid, // oid of possible row or table child
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mdb_bool* outIsRowChild); // nonzero if child, and a row child
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// Checking all cell metainfo is a good way to avoid forcing a large cell
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// in to memory when you don't actually want to use the content.
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NS_IMETHOD GetRow(nsIMdbEnv* ev, // parent row for this cell
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nsIMdbRow** acqRow);
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NS_IMETHOD GetPort(nsIMdbEnv* ev, // port containing cell
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nsIMdbPort** acqPort);
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// } ----- end attribute methods -----
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// { ----- begin children methods -----
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NS_IMETHOD HasAnyChild( // does cell have a child instead of text?
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nsIMdbEnv* ev,
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mdbOid* outOid, // out id of row or table (or unbound if no child)
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mdb_bool* outIsRow); // nonzero if child is a row (rather than a table)
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NS_IMETHOD GetAnyChild( // access table of specific attribute
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nsIMdbEnv* ev, // context
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nsIMdbRow** acqRow, // child row (or null)
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nsIMdbTable** acqTable); // child table (or null)
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NS_IMETHOD SetChildRow( // access table of specific attribute
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nsIMdbEnv* ev, // context
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nsIMdbRow* ioRow); // inRow must be bound inside this same db port
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NS_IMETHOD GetChildRow( // access row of specific attribute
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nsIMdbEnv* ev, // context
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nsIMdbRow** acqRow); // acquire child row (or nil if no child)
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NS_IMETHOD SetChildTable( // access table of specific attribute
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nsIMdbEnv* ev, // context
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nsIMdbTable* inTable); // table must be bound inside this same db port
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NS_IMETHOD GetChildTable( // access table of specific attribute
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nsIMdbEnv* ev, // context
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nsIMdbTable** acqTable); // acquire child table (or nil if no child)
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// } ----- end children methods -----
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// } ===== end nsIMdbCell methods =====
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private: // copying is not allowed
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morkCellObject(const morkCellObject& other);
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morkCellObject& operator=(const morkCellObject& other);
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public: // dynamic type identification
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mork_bool IsCellObject() const
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{ return IsNode() && mNode_Derived == morkDerived_kCellObject; }
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// } ===== end morkNode methods =====
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public: // other cell node methods
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morkEnv* CanUseCell(nsIMdbEnv* mev, mork_bool inMutable,
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mdb_err* outErr, morkCell** outCell) ;
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mork_bool ResyncWithRow(morkEnv* ev); // return ev->Good()
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morkAtom* GetCellAtom(morkEnv* ev) const;
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static void MissingRowColumnError(morkEnv* ev);
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static void NilRowError(morkEnv* ev);
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static void NilCellError(morkEnv* ev);
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static void NilRowObjectError(morkEnv* ev);
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static void WrongRowObjectRowError(morkEnv* ev);
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static void NonCellObjectTypeError(morkEnv* ev);
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nsIMdbCell* AcquireCellHandle(morkEnv* ev);
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public: // typesafe refcounting inlines calling inherited morkNode methods
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static void SlotWeakCellObject(morkCellObject* me,
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morkEnv* ev, morkCellObject** ioSlot)
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{ morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
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static void SlotStrongCellObject(morkCellObject* me,
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morkEnv* ev, morkCellObject** ioSlot)
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{ morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); }
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};
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//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
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#endif /* _MORKCELLOBJECT_ */
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