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200 lines
8 KiB
C
200 lines
8 KiB
C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MORKROWOBJECT_
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#define _MORKROWOBJECT_ 1
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#ifndef _MORK_
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#include "mork.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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class nsIMdbRow;
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#define morkDerived_kRowObject /*i*/ 0x724F /* ascii 'rO' */
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class morkRowObject : public morkObject, public nsIMdbRow { //
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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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morkRow* mRowObject_Row; // non-refcounted alias to morkRow
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morkStore* mRowObject_Store; // non-refcounted ptr to store containing 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) override; // CloseRowObject() only if open
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public: // morkRowObject construction & destruction
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morkRowObject(morkEnv* ev, const morkUsage& inUsage,
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nsIMdbHeap* ioHeap, morkRow* ioRow, morkStore* ioStore);
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void CloseRowObject(morkEnv* ev); // called by CloseMorkNode();
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// { ===== begin nsIMdbCollection methods =====
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// { ----- begin attribute methods -----
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NS_IMETHOD GetSeed(nsIMdbEnv* ev,
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mdb_seed* outSeed) override; // member change count
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NS_IMETHOD GetCount(nsIMdbEnv* ev,
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mdb_count* outCount) override; // member count
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NS_IMETHOD GetPort(nsIMdbEnv* ev,
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nsIMdbPort** acqPort) override; // collection container
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// } ----- end attribute methods -----
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// { ----- begin cursor methods -----
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NS_IMETHOD GetCursor( // make a cursor starting iter at inMemberPos
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nsIMdbEnv* ev, // context
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mdb_pos inMemberPos, // zero-based ordinal pos of member in collection
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nsIMdbCursor** acqCursor) override; // acquire new cursor instance
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// } ----- end cursor methods -----
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// { ----- begin ID methods -----
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NS_IMETHOD GetOid(nsIMdbEnv* ev,
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mdbOid* outOid) override; // read object identity
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NS_IMETHOD BecomeContent(nsIMdbEnv* ev,
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const mdbOid* inOid) override; // exchange content
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// } ----- end ID methods -----
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// { ----- begin activity dropping methods -----
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NS_IMETHOD DropActivity( // tell collection usage no longer expected
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nsIMdbEnv* ev) override;
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// } ----- end activity dropping methods -----
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// } ===== end nsIMdbCollection methods =====
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// { ===== begin nsIMdbRow methods =====
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// { ----- begin cursor methods -----
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NS_IMETHOD GetRowCellCursor( // make a cursor starting iteration at inRowPos
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nsIMdbEnv* ev, // context
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mdb_pos inRowPos, // zero-based ordinal position of row in table
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nsIMdbRowCellCursor** acqCursor) override; // acquire new cursor instance
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// } ----- end cursor methods -----
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// { ----- begin column methods -----
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NS_IMETHOD AddColumn( // make sure a particular column is inside row
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nsIMdbEnv* ev, // context
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mdb_column inColumn, // column to add
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const mdbYarn* inYarn) override; // cell value to install
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NS_IMETHOD CutColumn( // make sure a column is absent from the row
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nsIMdbEnv* ev, // context
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mdb_column inColumn) override; // column to ensure absent from row
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NS_IMETHOD CutAllColumns( // remove all columns from the row
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nsIMdbEnv* ev) override; // context
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// } ----- end column methods -----
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// { ----- begin cell methods -----
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NS_IMETHOD NewCell( // get cell for specified column, or add new one
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nsIMdbEnv* ev, // context
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mdb_column inColumn, // column to add
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nsIMdbCell** acqCell) override; // cell column and value
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NS_IMETHOD AddCell( // copy a cell from another row to this row
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nsIMdbEnv* ev, // context
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const nsIMdbCell* inCell) override; // cell column and value
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NS_IMETHOD GetCell( // find a cell in this row
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nsIMdbEnv* ev, // context
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mdb_column inColumn, // column to find
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nsIMdbCell** acqCell) override; // cell for specified column, or null
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NS_IMETHOD EmptyAllCells( // make all cells in row empty of content
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nsIMdbEnv* ev) override; // context
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// } ----- end cell methods -----
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// { ----- begin row methods -----
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NS_IMETHOD AddRow( // add all cells in another row to this one
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nsIMdbEnv* ev, // context
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nsIMdbRow* ioSourceRow) override; // row to union with
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NS_IMETHOD SetRow( // make exact duplicate of another row
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nsIMdbEnv* ev, // context
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nsIMdbRow* ioSourceRow) override; // row to duplicate
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// } ----- end row methods -----
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// { ----- begin blob methods -----
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NS_IMETHOD SetCellYarn(nsIMdbEnv* ev, // synonym for AddColumn()
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mdb_column inColumn, // column to write
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const mdbYarn* inYarn) override; // 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 GetCellYarn(nsIMdbEnv* ev,
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mdb_column inColumn, // column to read
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mdbYarn* outYarn) override; // 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 AliasCellYarn(nsIMdbEnv* ev,
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mdb_column inColumn, // column to alias
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mdbYarn* outYarn) override; // writes ALL yarn slots
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NS_IMETHOD NextCellYarn(nsIMdbEnv* ev, // iterative version of GetCellYarn()
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mdb_column* ioColumn, // next column to read
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mdbYarn* outYarn) override; // 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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//
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// The ioColumn argument is an inout parameter which initially contains the
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// last column accessed and returns the next column corresponding to the
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// content read into the yarn. Callers should start with a zero column
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// value to say 'no previous column', which causes the first column to be
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// read. Then the value returned in ioColumn is perfect for the next call
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// to NextCellYarn(), since it will then be the previous column accessed.
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// Callers need only examine the column token returned to see which cell
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// in the row is being read into the yarn. When no more columns remain,
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// and the iteration has ended, ioColumn will return a zero token again.
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// So iterating over cells starts and ends with a zero column token.
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NS_IMETHOD SeekCellYarn( // resembles nsIMdbRowCellCursor::SeekCell()
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nsIMdbEnv* ev, // context
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mdb_pos inPos, // position of cell in row sequence
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mdb_column* outColumn, // column for this particular cell
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mdbYarn* outYarn) override; // 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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// Callers can pass nil for outYarn to indicate no interest in content, so
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// only the outColumn value is returned. NOTE to subclasses: you must be
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// able to ignore outYarn when the pointer is nil; please do not crash.
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// } ----- end blob methods -----
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// } ===== end nsIMdbRow methods =====
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private: // copying is not allowed
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morkRowObject(const morkRowObject& other);
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morkRowObject& operator=(const morkRowObject& other);
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virtual ~morkRowObject(); // assert that CloseRowObject() executed earlier
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public: // dynamic type identification
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mork_bool IsRowObject() const
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{ return IsNode() && mNode_Derived == morkDerived_kRowObject; }
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// } ===== end morkNode methods =====
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public: // typing
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static void NonRowObjectTypeError(morkEnv* ev);
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static void NilRowError(morkEnv* ev);
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static void NilStoreError(morkEnv* ev);
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static void RowObjectRowNotSelfError(morkEnv* ev);
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public: // other row node methods
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nsIMdbRow* AcquireRowHandle(morkEnv* ev); // mObject_Handle
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public: // typesafe refcounting inlines calling inherited morkNode methods
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static void SlotWeakRowObject(morkRowObject* me,
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morkEnv* ev, morkRowObject** ioSlot)
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{ morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
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static void SlotStrongRowObject(morkRowObject* me,
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morkEnv* ev, morkRowObject** 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 /* _MORKROWOBJECT_ */
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