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127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
/* -*- 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 _MORKCURSOR_
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#define _MORKCURSOR_ 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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#define morkDerived_kCursor /*i*/ 0x4375 /* ascii 'Cu' */
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class morkCursor : public morkObject, public nsIMdbCursor{ // collection iterator
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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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// { ----- begin attribute methods -----
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NS_IMETHOD IsFrozenMdbObject(nsIMdbEnv* ev, mdb_bool* outIsReadonly) override;
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// same as nsIMdbPort::GetIsPortReadonly() when this object is inside a port.
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// } ----- end attribute methods -----
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// { ----- begin ref counting for well-behaved cyclic graphs -----
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NS_IMETHOD GetWeakRefCount(nsIMdbEnv* ev, // weak refs
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mdb_count* outCount) override;
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NS_IMETHOD GetStrongRefCount(nsIMdbEnv* ev, // strong refs
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mdb_count* outCount) override;
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NS_IMETHOD AddWeakRef(nsIMdbEnv* ev) override;
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#ifndef _MSC_VER
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// The first declaration of AddStrongRef is to suppress -Werror,-Woverloaded-virtual.
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NS_IMETHOD_(mork_uses) AddStrongRef(morkEnv* ev) override;
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#endif
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NS_IMETHOD_(mork_uses) AddStrongRef(nsIMdbEnv* ev) override;
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NS_IMETHOD CutWeakRef(nsIMdbEnv* ev) override;
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#ifndef _MSC_VER
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// The first declaration of CutStrongRef is to suppress -Werror,-Woverloaded-virtual.
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NS_IMETHOD_(mork_uses) CutStrongRef(morkEnv* ev) override;
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#endif
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NS_IMETHOD CutStrongRef(nsIMdbEnv* ev) override;
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NS_IMETHOD CloseMdbObject(nsIMdbEnv* ev) override; // called at strong refs zero
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NS_IMETHOD IsOpenMdbObject(nsIMdbEnv* ev, mdb_bool* outOpen) override;
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// } ----- end ref counting -----
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// } ===== end nsIMdbObject methods =====
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// { ===== begin nsIMdbCursor methods =====
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// { ----- begin attribute methods -----
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NS_IMETHOD GetCount(nsIMdbEnv* ev, mdb_count* outCount) override; // readonly
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NS_IMETHOD GetSeed(nsIMdbEnv* ev, mdb_seed* outSeed) override; // readonly
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NS_IMETHOD SetPos(nsIMdbEnv* ev, mdb_pos inPos) override; // mutable
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NS_IMETHOD GetPos(nsIMdbEnv* ev, mdb_pos* outPos) override;
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NS_IMETHOD SetDoFailOnSeedOutOfSync(nsIMdbEnv* ev, mdb_bool inFail) override;
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NS_IMETHOD GetDoFailOnSeedOutOfSync(nsIMdbEnv* ev, mdb_bool* outFail) override;
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// } ----- end attribute methods -----
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// } ===== end nsIMdbCursor methods =====
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// } ----- end attribute methods -----
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mork_seed mCursor_Seed;
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mork_pos mCursor_Pos;
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mork_bool mCursor_DoFailOnSeedOutOfSync;
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mork_u1 mCursor_Pad[ 3 ]; // explicitly pad to u4 alignment
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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; // CloseCursor() only if open
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public: // morkCursor construction & destruction
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morkCursor(morkEnv* ev, const morkUsage& inUsage, nsIMdbHeap* ioHeap);
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void CloseCursor(morkEnv* ev); // called by CloseMorkNode();
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protected:
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virtual ~morkCursor(); // assert that CloseCursor() executed earlier
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private: // copying is not allowed
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morkCursor(const morkCursor& other);
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morkCursor& operator=(const morkCursor& other);
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public: // dynamic type identification
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mork_bool IsCursor() const
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{ return IsNode() && mNode_Derived == morkDerived_kCursor; }
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// } ===== end morkNode methods =====
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public: // other cursor methods
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public: // typesafe refcounting inlines calling inherited morkNode methods
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static void SlotWeakCursor(morkCursor* me,
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morkEnv* ev, morkCursor** ioSlot)
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{ morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
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static void SlotStrongCursor(morkCursor* me,
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morkEnv* ev, morkCursor** 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 /* _MORKCURSOR_ */
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