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/* -*- 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 _MORKCURSOR_
#define _MORKCURSOR_ 1
#ifndef _MORK_
# include "mork.h"
#endif
#ifndef _MORKOBJECT_
# include "morkObject.h"
#endif
// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
#define morkDerived_kCursor /*i*/ 0x4375 /* ascii 'Cu' */
class morkCursor : public morkObject,
public nsIMdbCursor { // collection iterator
// public: // slots inherited from morkObject (meant to inform only)
// nsIMdbHeap* mNode_Heap;
// mork_able mNode_Mutable; // can this node be modified?
// mork_load mNode_Load; // is this node clean or dirty?
// mork_base mNode_Base; // must equal morkBase_kNode
// mork_derived mNode_Derived; // depends on specific node subclass
// mork_access mNode_Access; // kOpen, kClosing, kShut, or kDead
// mork_usage mNode_Usage; // kHeap, kStack, kMember, kGlobal, kNone
// mork_uses mNode_Uses; // refcount for strong refs
// mork_refs mNode_Refs; // refcount for strong refs + weak refs
// mork_color mBead_Color; // ID for this bead
// morkHandle* mObject_Handle; // weak ref to handle for this object
public: // state is public because the entire Mork system is private
NS_DECL_ISUPPORTS_INHERITED
// { ----- begin attribute methods -----
NS_IMETHOD IsFrozenMdbObject(nsIMdbEnv* ev, mdb_bool* outIsReadonly) override;
// same as nsIMdbPort::GetIsPortReadonly() when this object is inside a port.
// } ----- end attribute methods -----
// { ----- begin ref counting for well-behaved cyclic graphs -----
NS_IMETHOD GetWeakRefCount(nsIMdbEnv* ev, // weak refs
mdb_count* outCount) override;
NS_IMETHOD GetStrongRefCount(nsIMdbEnv* ev, // strong refs
mdb_count* outCount) override;
NS_IMETHOD AddWeakRef(nsIMdbEnv* ev) override;
#ifndef _MSC_VER
// The first declaration of AddStrongRef is to suppress
// -Werror,-Woverloaded-virtual.
NS_IMETHOD_(mork_uses) AddStrongRef(morkEnv* ev) override;
#endif
NS_IMETHOD_(mork_uses) AddStrongRef(nsIMdbEnv* ev) override;
NS_IMETHOD CutWeakRef(nsIMdbEnv* ev) override;
#ifndef _MSC_VER
// The first declaration of CutStrongRef is to suppress
// -Werror,-Woverloaded-virtual.
NS_IMETHOD_(mork_uses) CutStrongRef(morkEnv* ev) override;
#endif
NS_IMETHOD CutStrongRef(nsIMdbEnv* ev) override;
NS_IMETHOD CloseMdbObject(
nsIMdbEnv* ev) override; // called at strong refs zero
NS_IMETHOD IsOpenMdbObject(nsIMdbEnv* ev, mdb_bool* outOpen) override;
// } ----- end ref counting -----
// } ===== end nsIMdbObject methods =====
// { ===== begin nsIMdbCursor methods =====
// { ----- begin attribute methods -----
NS_IMETHOD GetCount(nsIMdbEnv* ev, mdb_count* outCount) override; // readonly
NS_IMETHOD GetSeed(nsIMdbEnv* ev, mdb_seed* outSeed) override; // readonly
NS_IMETHOD SetPos(nsIMdbEnv* ev, mdb_pos inPos) override; // mutable
NS_IMETHOD GetPos(nsIMdbEnv* ev, mdb_pos* outPos) override;
NS_IMETHOD SetDoFailOnSeedOutOfSync(nsIMdbEnv* ev, mdb_bool inFail) override;
NS_IMETHOD GetDoFailOnSeedOutOfSync(nsIMdbEnv* ev,
mdb_bool* outFail) override;
// } ----- end attribute methods -----
// } ===== end nsIMdbCursor methods =====
// } ----- end attribute methods -----
mork_seed mCursor_Seed;
mork_pos mCursor_Pos;
mork_bool mCursor_DoFailOnSeedOutOfSync;
mork_u1 mCursor_Pad[3]; // explicitly pad to u4 alignment
// { ===== begin morkNode interface =====
public: // morkNode virtual methods
virtual void CloseMorkNode(
morkEnv* ev) override; // CloseCursor() only if open
public: // morkCursor construction & destruction
morkCursor(morkEnv* ev, const morkUsage& inUsage, nsIMdbHeap* ioHeap);
void CloseCursor(morkEnv* ev); // called by CloseMorkNode();
protected:
virtual ~morkCursor(); // assert that CloseCursor() executed earlier
private: // copying is not allowed
morkCursor(const morkCursor& other);
morkCursor& operator=(const morkCursor& other);
public: // dynamic type identification
mork_bool IsCursor() const {
return IsNode() && mNode_Derived == morkDerived_kCursor;
}
// } ===== end morkNode methods =====
public: // other cursor methods
public: // typesafe refcounting inlines calling inherited morkNode methods
static void SlotWeakCursor(morkCursor* me, morkEnv* ev, morkCursor** ioSlot) {
morkNode::SlotWeakNode((morkNode*)me, ev, (morkNode**)ioSlot);
}
static void SlotStrongCursor(morkCursor* me, morkEnv* ev,
morkCursor** ioSlot) {
morkNode::SlotStrongNode((morkNode*)me, ev, (morkNode**)ioSlot);
}
};
// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
#endif /* _MORKCURSOR_ */
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