gecko-dev/lib/libmsg/msglpane.h

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2.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef _MsgLPane_H_
#define _MsgLPane_H_
#include "msgpane.h"
typedef struct MSG_LinedPaneStack MSG_LinedPaneStack;
class MSG_LinedPane : public MSG_Pane {
public:
MSG_LinedPane(MWContext* context, MSG_Master* master);
virtual ~MSG_LinedPane();
virtual XP_Bool IsLinePane();
virtual void ToggleExpansion(MSG_ViewIndex line, int32* numchanged) = 0;
virtual int32 ExpansionDelta(MSG_ViewIndex line) = 0;
virtual int32 GetNumLines() = 0;
virtual void StartingUpdate(MSG_NOTIFY_CODE code, MSG_ViewIndex where,
int32 num);
virtual void EndingUpdate(MSG_NOTIFY_CODE code, MSG_ViewIndex where,
int32 num);
virtual void OnFolderChanged(MSG_FolderInfo *);
virtual XP_Bool IsValidIndex(MSG_ViewIndex index);
protected:
virtual void FEStart() { // Starting a call from the FE.
m_fecount++;
}
virtual void FEEnd() { // Finished a call from the FE.
m_fecount--;
XP_ASSERT(m_fecount >= 0);
}
virtual void DisableUpdate(); // Don't actually do anything when calling
// StartingUpdate() and EndingUpdate().
virtual void EnableUpdate(); // OK; StartingUpdate() and EndingUpdate()
// can do things again.
MSG_LinedPaneStack* m_stack;// Used only when DEBUG is on; helps check
// that calls to StartingUpdate and
// EndingUpdate match up correctly.
// m_numstack is now in the base class because we use it to know if we're nested
int m_maxstack;
int m_fecount; // How many calls we've had to FEStart()
// without a matching call to FEEnd().
int m_disablecount; // How many calls we've had to DisableUpdate()
// without a matching call to EnableUpdate().
};
#endif /* _MsgLPane_H_ */