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1001 lines
25 KiB
1001 lines
25 KiB
/*
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* @doc INTERNAL
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*
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* @module ANTIEVT.C |
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*
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* Purpose:
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* implemenation of common antievents and a caching mechanism
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*
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* Author:
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* alexgo 3/25/95
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*
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* Copyright (c) 1995-2000, Microsoft Corporation. All rights reserved.
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*/
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#include "_common.h"
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#include "_m_undo.h"
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#include "_edit.h"
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#include "_antievt.h"
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#include "_range.h"
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#include "_select.h"
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#include "_format.h"
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#include "_coleobj.h"
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#include "_objmgr.h"
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#ifdef DEBUG
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#include "_uspi.h"
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#endif
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ASSERTDATA
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//
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// CAntiEventDispenser global instance
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//
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CAntiEventDispenser gAEDispenser;
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//
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// CBaseAE PUBLIC methods
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//
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/*
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* CBaseAE::Destroy ()
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*
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* @mfunc
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* sends the Destroy notification to the next antievent in the list
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*/
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void CBaseAE::Destroy()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::Destroy");
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}
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/*
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* CBaseAE::Undo (ped, publdr)
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*
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* @mfunc
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* sends the Undo notification to the next antievent in the list
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*
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* @rdesc HRESULT
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*/
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HRESULT CBaseAE::Undo(
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CTxtEdit * ped, //@parm Edit context for this undo operation
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IUndoBuilder *publdr) //@parm Undo context.
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::Undo");
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return NOERROR;
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}
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/*
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* CBaseAE::OnCommit (ped)
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*
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* @mfunc called after the antievent is added to the undo stack
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*
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* @rdesc void
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*/
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void CBaseAE::OnCommit(
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CTxtEdit *ped) //@parm Edit context
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{
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}
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/*
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* CBaseAE::MergeData (dwDataType, pdata)
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*
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* @mfunc simply forwards the merge data request to the next antievent
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* (if one exists)
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*
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* @rdesc HRESULT. If S_FALSE, indicates that nothing could be done
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* with the merge data.
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*/
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HRESULT CBaseAE::MergeData(
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DWORD dwDataType, //@parm Type of data in <p pdata>
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void *pdata) //@parm Merge data
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::MergeData");
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return S_FALSE;
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}
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/*
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* CBaseAE::SetNext(pNext)
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*
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* @mfunc
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* informs this antievent of the antievent which should follow it
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*/
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void CBaseAE::SetNext(
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IAntiEvent *pNext) //@parm the AntiEvent to link to
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::SetNext");
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_pnext = pNext;
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}
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/*
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* CBaseAE::GetNext()
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*
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* @mfunc
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* retrieves the next element (if any)
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*
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* @rdesc a pointer to the next AntiEvent
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*/
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IAntiEvent *CBaseAE::GetNext()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::GetNext");
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return _pnext;
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}
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//
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// CBaseAE PROTECTED methods
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//
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/*
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* CBaseAE::CBaseAE()
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*
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* @mfunc Constructor
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*/
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CBaseAE::CBaseAE()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CBaseAE::CBaseAE");
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_pnext = NULL;
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}
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/*
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* CReplaceRangeAE::Destroy ()
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*
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* @mfunc
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* deletes this instance
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*/
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void CReplaceRangeAE::Destroy()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceRangeAE::Destroy");
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if(_paeCF)
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{
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_paeCF->Destroy();
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_paeCF = NULL;
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}
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if(_paePF)
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{
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_paePF->Destroy();
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_paePF = NULL;
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}
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CBaseAE::Destroy();
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delete this;
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}
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/*
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* CReplaceRangeAE::Undo (ped, publdr)
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*
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* @mfunc
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* undoes a CTxtPtr::ReplaceRange operation
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*
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* @rdesc
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* HRESULT
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*
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* @comm
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* Algorithm:
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*
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* A replace range works as follows: delete n characters and in their
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* place, put m characters.
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*
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* To undo this, we delete m characters and restore the n that were
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* originally deleted. Note that we restore the n characters with
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* default formatting. If there was any other formatting to those
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* characters, a separate antievent (CReplaceFormattingAE) will
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* apply the correct formatting.
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*/
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HRESULT CReplaceRangeAE::Undo(
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CTxtEdit * ped, //@parm Context for this undo operation
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IUndoBuilder *publdr) //@parm Undo context
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceRangeAE::Undo");
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CRchTxtPtr rtp(ped, _cpMin);
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LONG cchMove = 0;
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rtp.ReplaceRange(_cpMax - _cpMin, _cchDel, _pchDel,
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publdr, -1, &cchMove,
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RR_ITMZ_NONE | RR_NO_TRD_CHECK); // RAID 6554
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// Passing NULL for the publdr is *extremely* important
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// below. The rich text pointer ReplaceRange call will
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// already generate the appropriate antievents for any
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// deleted formatting, so we do not need to repeat that here.
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if(_paeCF)
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_paeCF->Undo(ped, NULL);
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if(_paePF)
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_paePF->Undo(ped, NULL);
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if (ped->IsComplexScript())
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{
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// For complex script doc, we need itemization at the end of the range undo.
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// Since the formattings were rolled back, the rtp's runptrs are no longer
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// reliable.
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if (_paeCF && rtp._rpCF.IsValid())
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rtp._rpCF.BindToCp(_cpMin + _cchDel);
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if (_paePF && rtp._rpPF.IsValid())
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rtp._rpPF.BindToCp(_cpMin + _cchDel);
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rtp.ItemizeReplaceRange(_cchDel, cchMove, NULL, FALSE);
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}
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return CBaseAE::Undo(ped, publdr);
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}
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/*
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* CReplaceRangeAE::MergeData (dwDataType, pdata)
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*
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* @mfunc gives the caller a chance to extend the current antievent
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* if we're in merge typing mode
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*
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* @rdesc
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* HRESULT
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*
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* @comm if the requested data can be trivially merged into this
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* antievent, then do so; otherwise, return S_FALSE.
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*
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* There are two cases of interest: <nl>
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* 1. typing another character
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* 2. backspacing over a character in this merge
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* typing session.
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*/
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HRESULT CReplaceRangeAE::MergeData(
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DWORD dwDataType, //@parm Type of <p pdata>
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void *pdata) //@parm Merge data
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceRangeAE::MergeData");
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if(dwDataType == MD_SIMPLE_REPLACERANGE)
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{
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SimpleReplaceRange *psr = (SimpleReplaceRange *)pdata;
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// Test for first case: just typing another character
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if(psr->cpMin == _cpMax && psr->cchDel == 0)
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{
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_cpMax = psr->cpMax;
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return NOERROR;
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}
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// Second case: deleting text stored in this antievent
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if (psr->cpMax == psr->cpMin &&
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psr->cpMin + psr->cchDel == _cpMax &&
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psr->cpMin >= _cpMin)
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{
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_cpMax = psr->cpMax;
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return NOERROR;
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}
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}
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return S_FALSE;
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}
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/*
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* CReplaceRangeAE::CReplaceRangeAE (cpMin, cpMax, cchDel, pchDel, paeCF, paePF)
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*
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* @mfunc Constructor for a text replace range antievent
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*/
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CReplaceRangeAE::CReplaceRangeAE(
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LONG cpMin, //@parm cp starting the *final* range
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LONG cpMax, //@parm cp ending the *final* range
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LONG cchDel, //@parm # of chars deleted during ReplaceRange
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WCHAR *pchDel, //@parm Deleted characters. Ownership xfers to this object
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IAntiEvent *paeCF, //@parm Antievent for any character formatting replacement
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IAntiEvent *paePF) //@parm Antievent for any paragraph formatting replacement
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceRangeAE::CReplaceRangeAE");
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_cpMin = cpMin;
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_cpMax = cpMax;
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_cchDel = cchDel;
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_pchDel = pchDel;
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_paeCF = paeCF;
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_paePF = paePF;
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}
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/*
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* CReplaceRangeAE::~CReplaceRangeAE ()
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*
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* @mfunc Destructor
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*/
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CReplaceRangeAE::~CReplaceRangeAE()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceRangeAE::~CReplaceRangeAE");
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if(_pchDel)
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delete _pchDel;
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}
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/*
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* CReplaceFormattingAE
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*
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* @mfunc Destroys this instance
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*/
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void CReplaceFormattingAE::Destroy()
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceFormattingAE::Destroy");
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CBaseAE::Destroy();
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delete this;
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}
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/*
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* CReplaceFormattingAE::Undo (ped, publdr)
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*
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* @mfunc Undoes a formatting operation
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*
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* @rdesc
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* HRESULT
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*
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* @devnote This antievent assumes that the text to which formatting
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* should be applied exists!!
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*/
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HRESULT CReplaceFormattingAE::Undo(
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CTxtEdit * ped, //@parm CTxtEdit closure
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IUndoBuilder *publdr) //@parm Undo builder context
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceFormattingAE::Undo");
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LONG cchEaten;
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LONG cchTotal = 0;
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LONG delta;
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LONG iRunMerge;
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IAntiEvent * pae;
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IFormatCache * pf = _fPara
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? (IFormatCache *)GetParaFormatCache()
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: (IFormatCache *)GetCharFormatCache();
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CNotifyMgr * pnm = ped->GetNotifyMgr();
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CFormatRuns ** ppfmtruns;
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CTxtStory * pStory = ped->GetTxtStory();
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const CParaFormat * pDefPF = _fPara ? pStory->GetParaFormat(-1) : NULL;
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BYTE bDefPFLevel = pDefPF && pDefPF->IsRtl() ? 1 : 0;
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// First set things up correctly for whether we are paragraph
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// or character formatting
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CFormatRunPtr rp(_fPara ? pStory->GetPFRuns() :pStory->GetCFRuns());
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// Count up count of characters affected
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for(LONG i = 0 ; i < _cRuns; i++)
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cchTotal += _prgRuns[i]._cch;
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// We are going to be adding in some runs, so be sure the format
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// run array is allocated!
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if(!rp.IsValid())
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{
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ppfmtruns = _fPara ? &(pStory->_pPFRuns) : &(pStory->_pCFRuns);
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if(!rp.InitRuns(0, ped->GetTextLength(), ppfmtruns))
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return E_OUTOFMEMORY;
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// tell folks we allocated a new run
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if(pnm)
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pnm->NotifyPostReplaceRange(NULL, CP_INFINITE, 0, 0, CP_INFINITE, CP_INFINITE);
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}
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// Now do a pre-notification of the change we are about to make
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// This lets objects like a delayed render data object grab
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// any data *before* we change it.
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// Do a little more checking
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#ifdef DEBUG
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LONG cchText = ped->GetTextLength();
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LONG cp =
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#endif
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rp.BindToCp(_cp);
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AssertSz(_cp == cp && rp.CalcTextLength() == cchText && _cp <= cchText,
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"CReplaceFormattingAE::Undo: invalid cp");
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if(pnm)
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pnm->NotifyPreReplaceRange(NULL, CP_INFINITE, 0, 0, _cp, _cp + cchTotal);
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// We want to merge runs with where we start plus one behind
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iRunMerge = rp._iRun;
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if(iRunMerge > 0)
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iRunMerge--;
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// If we need to be able to undo this operation, go through and
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// save existing run information
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if(publdr)
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{
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LONG cchBackup = 0, cchMove = 0;
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if (ped->IsBiDi())
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{
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// For redo'ing purpose, we expand the range to keep in the antievent
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// to make sure that BiDi levels are recorded adequately.
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CRchTxtPtr rtp(ped, _cp);
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cchBackup = rtp.ExpandRangeFormatting(cchTotal, 0, cchMove);
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Assert(cchBackup <= 0);
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rp.Move(cchBackup);
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}
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pae = gAEDispenser.CreateReplaceFormattingAE(ped, _cp + cchBackup, rp,
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cchTotal - cchBackup + cchMove, pf, _fPara);
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rp.Move(-cchBackup);
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if(pae)
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publdr->AddAntiEvent(pae);
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}
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// Now go through and apply the saved formatting.
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for(i = 0; i < _cRuns; i++)
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{
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cchEaten = 0;
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// Use a do-while, because we may have a zero-length
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// format run. We know we need to do "something" at
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// least once, because otherwise, we would not have
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// bothered creating a run!
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do
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{
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if (_fPara && _prgRuns[i]._iFormat == -1)
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// (#6768) The -1 format may have changed before undoing.
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_prgRuns[i]._level._value = bDefPFLevel;
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delta = rp.SetFormat(_prgRuns[i]._iFormat,
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_prgRuns[i]._cch - cchEaten, pf, &_prgRuns[i]._level);
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if(delta == -1)
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{
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ped->GetCallMgr()->SetOutOfMemory();
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break;
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}
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cchEaten += delta;
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} while(cchEaten < _prgRuns[i]._cch);
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}
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// Merge formatting runs in case there are duplicate formatting
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// runs side by side
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rp.NextRun();
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rp.MergeRuns(iRunMerge, pf);
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// Make sure the runs are still OK
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AssertNr(rp.CalcTextLength() == cchText);
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if(pnm)
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pnm->NotifyPostReplaceRange(NULL, CP_INFINITE, 0, 0, _cp, _cp + cchTotal);
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ped->GetCallMgr()->SetChangeEvent(CN_GENERIC);
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return CBaseAE::Undo(ped, publdr);
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}
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/*
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* CReplaceFormattingAE::CReplaceFormattingAE(ped, cp, &rpIn, cch, pf, fPara)
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*
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* @mfunc Constructor. During construction, we will loop through and
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* find all of the formats for the given text range
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*/
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CReplaceFormattingAE::CReplaceFormattingAE(
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CTxtEdit * ped, //@parm CTxtEdit
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LONG cp, //@parm cp at start of replace
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CFormatRunPtr &rpIn, //@parm Run pointer to start with
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LONG cch, //@parm cch to find formatting info on
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IFormatCache * pf, //@parm Format cache (to AddRef/Release formats)
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BOOL fPara) //@parm If TRUE, formatting is for paras
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{
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TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceFormattingAE::CReplaceFormattingAE");
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LONG cchLeft;
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LONG cchTemp = cch;
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CFormatRunPtr rp(rpIn); // We use 2 format run pointers to avoid
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CFormatRunPtr rpTemp(rpIn); // backing up after counting the number of
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// format runs
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Assert(pf);
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_cp = cp;
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AssertSz(_cp == (cp = rpIn.CalculateCp()),
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"CReplaceFormattingAE::CReplaceFormattingAE: illegal cp");
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_fPara = fPara;
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// Count the number of formats needed. Recall that even if no characters
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// are to be deleted, we may still be "deleting" a zero length format run.
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_cRuns = 0;
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do
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{
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_cRuns++;
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cchLeft = rp.GetCchLeft();
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cchTemp -= min(cchLeft, cchTemp);
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} while(rp.NextRun() && cchTemp > 0);
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_prgRuns = new CFormatRun[_cRuns];
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if(!_prgRuns)
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{
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_cRuns = 0;
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return;
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}
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for(LONG i = 0; i < _cRuns; i++)
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{
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_prgRuns[i]._cch = min(cch, rpTemp.GetCchLeft());
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CFormatRun *pRun = rpTemp.GetRun(0);
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_prgRuns[i]._iFormat = pRun->_iFormat;
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_prgRuns[i]._level = pRun->_level;
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pf->AddRef(_prgRuns[i]._iFormat);
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rpTemp.NextRun();
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cch -= _prgRuns[i]._cch;
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}
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Assert(cch == 0);
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}
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/*
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* CReplaceFormattingAE::~CReplaceFormattingAE ()
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*
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* @mfunc Destructor
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*/
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CReplaceFormattingAE::~CReplaceFormattingAE()
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{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceFormattingAE::~CReplaceFormattingAE");
|
|
|
|
IFormatCache * pf = _fPara
|
|
? (IFormatCache *)GetParaFormatCache()
|
|
: (IFormatCache *)GetCharFormatCache();
|
|
if(_prgRuns)
|
|
{
|
|
if(pf)
|
|
{
|
|
for(LONG i = 0; i < _cRuns; i++)
|
|
pf->Release(_prgRuns[i]._iFormat);
|
|
}
|
|
delete _prgRuns;
|
|
}
|
|
}
|
|
|
|
//
|
|
// CReplaceObjectAE PUBLIC methods
|
|
//
|
|
|
|
/*
|
|
* CReplaceObjectAE::Destroy()
|
|
*
|
|
* @mfunc Destroy's this object
|
|
*/
|
|
void CReplaceObjectAE::Destroy()
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceObjectAE::Destroy");
|
|
|
|
COleObject *pobj = _pobj;
|
|
_pobj = NULL;
|
|
|
|
// We only need to zombie the object if it wasn't put back into
|
|
// the document.
|
|
if(!_fUndoInvoked)
|
|
pobj->MakeZombie();
|
|
|
|
pobj->Release();
|
|
CBaseAE::Destroy();
|
|
delete this;
|
|
}
|
|
|
|
/*
|
|
* CReplaceObjectAE::Undo (ped, publdr)
|
|
*
|
|
* @mfunc
|
|
* Undo'es the delete operation and restores the object
|
|
* to its original state
|
|
*
|
|
* @rdesc HRESULT
|
|
*/
|
|
HRESULT CReplaceObjectAE::Undo(
|
|
CTxtEdit * ped, //@parm Edit context
|
|
IUndoBuilder *publdr) //@parm Undo/redo context
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceObjectAE::Undo");
|
|
|
|
CObjectMgr *pobjmgr = ped->GetObjectMgr();
|
|
if(_pobj && pobjmgr)
|
|
{
|
|
_fUndoInvoked = TRUE;
|
|
_pobj->Restore();
|
|
pobjmgr->RestoreObject(_pobj);
|
|
}
|
|
return CBaseAE::Undo(ped, publdr);
|
|
}
|
|
|
|
/*
|
|
* CReplaceObjectAE::OnCommit(ped)
|
|
*
|
|
* @mfunc called when the antievent chain is committed to the
|
|
* undo stack. This gives us a chance to make 'dangerous'
|
|
* calls that could cause us to be re-entered.
|
|
*/
|
|
void CReplaceObjectAE::OnCommit(
|
|
CTxtEdit *ped) //@parm Edit context
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceObjectAE::OnCommit");
|
|
_pobj->Close(OLECLOSE_SAVEIFDIRTY);
|
|
}
|
|
|
|
//
|
|
// CReplaceObjectAE PRIVATE methods
|
|
//
|
|
|
|
/*
|
|
* CReplaceObjectAE::CReplaceObjectAE (pobj)
|
|
*
|
|
* @mfunc constructor
|
|
*/
|
|
CReplaceObjectAE::CReplaceObjectAE(
|
|
COleObject *pobj) //@parm Object that was deleted
|
|
{
|
|
_fUndoInvoked = FALSE;
|
|
_pobj = pobj;
|
|
_pobj->AddRef();
|
|
}
|
|
|
|
/*
|
|
* CReplaceObjectAE::~CReplaceObjectAE
|
|
*
|
|
* @mfunc destructor
|
|
*/
|
|
CReplaceObjectAE::~CReplaceObjectAE()
|
|
{
|
|
Assert(_pobj == NULL);
|
|
}
|
|
|
|
//
|
|
// CResizeObjectAE PUBLIC methods
|
|
//
|
|
|
|
/*
|
|
* CResizeObjectAE::Destroy ()
|
|
*
|
|
* @mfunc Destroy's this object
|
|
*/
|
|
void CResizeObjectAE::Destroy()
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CResizeObjectAE::Destroy");
|
|
|
|
_pobj = NULL;
|
|
CBaseAE::Destroy();
|
|
|
|
delete this;
|
|
}
|
|
|
|
/*
|
|
* CResizeObjectAE::Undo(ped, publdr)
|
|
*
|
|
* @mfunc Undo'es the resize operation and restores the object
|
|
* to it's original size/position
|
|
*
|
|
* @rdesc HRESULT
|
|
*/
|
|
HRESULT CResizeObjectAE::Undo(
|
|
CTxtEdit * ped, //@parm Edit context
|
|
IUndoBuilder *publdr) //@parm Undo/redo context
|
|
{
|
|
CObjectMgr *pobjmgr;
|
|
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceObjectAE::Undo");
|
|
|
|
pobjmgr = ped->GetObjectMgr();
|
|
|
|
if(_pobj && pobjmgr)
|
|
{
|
|
_fUndoInvoked = TRUE;
|
|
_pobj->Resize(_size, FALSE);
|
|
}
|
|
|
|
return CBaseAE::Undo(ped, publdr);
|
|
}
|
|
|
|
/*
|
|
* CResizeObjectAE::OnCommit(ped)
|
|
*
|
|
* @mfunc called when the antievent chain is committed to the
|
|
* undo stack. This gives us a chance to make 'dangerous'
|
|
* calls that could cause us to be re-entered.
|
|
*/
|
|
void CResizeObjectAE::OnCommit(
|
|
CTxtEdit *ped) //@parm Edit context
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CReplaceObjectAE::OnCommit");
|
|
}
|
|
|
|
//
|
|
// CResizeObjectAE PRIVATE methods
|
|
//
|
|
|
|
/*
|
|
* CResizeObjectAE::CResizeObjectAE (pobj, size)
|
|
*
|
|
* @mfunc constructor
|
|
*/
|
|
CResizeObjectAE::CResizeObjectAE(
|
|
COleObject *pobj, //@parm Object that was resized
|
|
SIZEUV size) //@parm Old size
|
|
{
|
|
_fUndoInvoked = FALSE;
|
|
_pobj = pobj;
|
|
_size = size;
|
|
}
|
|
|
|
/*
|
|
* CResizeObjectAE::~CResizeObjectAE
|
|
*
|
|
* @mfunc destructor
|
|
*/
|
|
CResizeObjectAE::~CResizeObjectAE()
|
|
{
|
|
Assert(_pobj == NULL);
|
|
}
|
|
|
|
//
|
|
// CSelectionAE PUBLIC methods
|
|
//
|
|
|
|
/*
|
|
* CSelectionAE::Destroy ()
|
|
*
|
|
* @mfunc gets rid of this instance
|
|
*/
|
|
void CSelectionAE::Destroy()
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CSelectionAE::Destroy");
|
|
|
|
CBaseAE::Destroy();
|
|
delete this;
|
|
}
|
|
|
|
/*
|
|
* CSelectionAE::Undo (ped, publdr)
|
|
*
|
|
* @mfunc Restore selection to its former position
|
|
*
|
|
* @rdesc NOERROR
|
|
*/
|
|
HRESULT CSelectionAE::Undo(
|
|
CTxtEdit * ped, //@parm Edit context
|
|
IUndoBuilder *publdr) //@parm Undo context
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CSelectionAE::Destroy");
|
|
|
|
CTxtSelection *psel = ped->GetSel();
|
|
|
|
if(psel)
|
|
psel->SetDelayedSelectionRange(_cp, _cch);
|
|
|
|
if(publdr)
|
|
{
|
|
IAntiEvent *pae;
|
|
pae = gAEDispenser.CreateSelectionAE(ped, _cpNext, _cchNext,
|
|
_cp, _cch);
|
|
if(pae)
|
|
publdr->AddAntiEvent(pae);
|
|
}
|
|
return CBaseAE::Undo(ped, publdr);
|
|
}
|
|
|
|
/*
|
|
* CSelectionAE::MergeData(dwDataType, pdata)
|
|
*
|
|
* @mfunc merges new selection data
|
|
*
|
|
* @rdesc S_FALSE, NOERROR
|
|
*
|
|
* @comm The mergine algorithm is fairly tricky. There are basically two
|
|
* cases of interest: group typing and drag-move.
|
|
*
|
|
* In the group typing case, the "start" of the typing becomes a
|
|
* fixed reference from which characters are added or removed (i.e.
|
|
* you type or hit the backspace key). "Undo" should return you to
|
|
* that reference point; redo, on the other hand, should return the
|
|
* selection to the last insertion point. Thus, we only update
|
|
* _xxNext for the SELAE_MERGE action.
|
|
*
|
|
* Drag-Move is somewhat different; in this case, there are really
|
|
* two actions--the "paste" on the drop, and the subsequent "cut"
|
|
* operation. Thus, we need to be able to update the selection
|
|
* antievent during the cut (since this only happens on move; not
|
|
* copies). This is accomplished with teh FORCEREPLACE flag
|
|
* and by setting fields to -1 to be ignored.
|
|
*
|
|
*/
|
|
HRESULT CSelectionAE::MergeData(
|
|
DWORD dwDataType, //@parm Type of data in <p pdata>
|
|
void *pdata) //@parm Merge data
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CSelectionAE::MergeData");
|
|
|
|
SelRange *psrg = (SelRange *)pdata;
|
|
|
|
if(dwDataType == MD_SELECTIONRANGE)
|
|
{
|
|
if(psrg->flags == SELAE_MERGE)
|
|
{
|
|
Assert(psrg->cpNext != -1);
|
|
_cpNext = psrg->cpNext;
|
|
_cchNext = psrg->cchNext;
|
|
}
|
|
else
|
|
{
|
|
// -1 is used a no-op, so we should ignore it
|
|
if(psrg->cp != -1)
|
|
{
|
|
_cp = psrg->cp;
|
|
_cch = psrg->cch;
|
|
}
|
|
if(psrg->cpNext != -1)
|
|
{
|
|
_cpNext = psrg->cpNext;
|
|
_cchNext = psrg->cchNext;
|
|
}
|
|
}
|
|
return NOERROR;
|
|
}
|
|
return S_FALSE;
|
|
}
|
|
|
|
//
|
|
// CSelectionAE PRIVATE methods
|
|
//
|
|
|
|
/*
|
|
* CSelectionAE::CSelectionAE (cp, cch, cpNext, cchNext)
|
|
*
|
|
* @mfunc Constructor
|
|
*/
|
|
CSelectionAE::CSelectionAE(
|
|
LONG cp, //@parm Active end cp
|
|
LONG cch, //@parm Signed extension
|
|
LONG cpNext, //@parm cp to use for the AE of this AE
|
|
LONG cchNext) //@parm cch for the AE of this AE
|
|
{
|
|
_cp = cp;
|
|
_cch = cch;
|
|
_cpNext = cpNext;
|
|
_cchNext = cchNext;
|
|
}
|
|
|
|
/*
|
|
* CSelectionAE::~CSelectionAE()
|
|
*
|
|
* @mfunc desctructor
|
|
*/
|
|
CSelectionAE::~CSelectionAE()
|
|
{
|
|
;
|
|
}
|
|
|
|
/*
|
|
* CAntiEventDispenser::CreateReplaceRangeAE(ped, cpMin, cpMax, cchDel,
|
|
* pchDel, paeCF, paePF)
|
|
* @mfunc
|
|
* creates an antievent for a replace range operation
|
|
*
|
|
* @rdesc
|
|
* IAntiEvent *
|
|
*/
|
|
IAntiEvent * CAntiEventDispenser::CreateReplaceRangeAE(
|
|
CTxtEdit * ped, //@parm edit context
|
|
LONG cpMin, //@parm cp starting the *final* range
|
|
LONG cpMax, //@parm cp ending the *final* range
|
|
LONG cchDel, //@parm # of chars deleted during ReplaceRange
|
|
WCHAR * pchDel, //@parm Deleted chars. Ownership transfers to this object
|
|
IAntiEvent *paeCF, //@parm Antievent for any char formatting replacement
|
|
IAntiEvent *paePF) //@parm Antievent for any para formatting replacement
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CAntiEventDispenser::CreateReplaceRangeAE");
|
|
|
|
// FUTURE (alexgo): improve the efficiency of this routine!!
|
|
IAntiEvent *pae = (IAntiEvent *)(new CReplaceRangeAE(cpMin, cpMax,
|
|
cchDel, pchDel, paeCF, paePF));
|
|
if(!pae)
|
|
{
|
|
// We don't need to do anything else; the callmgr will discard
|
|
// undo for us.
|
|
ped->GetCallMgr()->SetOutOfMemory();
|
|
}
|
|
return pae;
|
|
}
|
|
|
|
/*
|
|
* CAntiEventDispenser::CreateReplaceFormattingAE(ped, cp, &rp, cch, pf, fPara)
|
|
*
|
|
* @mfunc
|
|
* Creates an antievent for replacing formatting
|
|
*
|
|
* @rdesc
|
|
* IAntiEvent *
|
|
*/
|
|
IAntiEvent * CAntiEventDispenser::CreateReplaceFormattingAE(
|
|
CTxtEdit * ped, //@parm Edit context
|
|
LONG cp, //@parm Position at start of replace
|
|
CFormatRunPtr & rp, //@parm Run pointer to start with
|
|
LONG cch, //@parm Count of characters to find formatting info on
|
|
IFormatCache * pf, //@parm Format cache (to AddRef/Release formats)
|
|
BOOL fPara) //@parm If TRUE, formatting is paragraphs
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN, "CAntiEventDispenser::CreateReplaceFormattingAE");
|
|
|
|
// FUTURE (alexgo): improve the efficiency of this routine!!!
|
|
IAntiEvent *pae = (IAntiEvent *)(new CReplaceFormattingAE(ped, cp, rp, cch, pf, fPara));
|
|
if(!pae)
|
|
{
|
|
// We don't need to do anything else; the callmgr will discard
|
|
// undo for us.
|
|
ped->GetCallMgr()->SetOutOfMemory();
|
|
}
|
|
return pae;
|
|
}
|
|
|
|
/*
|
|
* CAntiEventDispenser::CreateReplaceObjectAE (ped, pobj)
|
|
*
|
|
* @mfunc Creates an antievent for replacing an object
|
|
*
|
|
* @rdesc
|
|
* IAntiEvent * created
|
|
*/
|
|
IAntiEvent * CAntiEventDispenser::CreateReplaceObjectAE(
|
|
CTxtEdit * ped, //@parm Edit context.
|
|
COleObject *pobj) //@parm Object that was deleted
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN,
|
|
"CAntiEventDispenser::CreateReplaceObjectAE");
|
|
|
|
// Always allocating is probably a reasonable strategy for objects;
|
|
// they are not expected to be the bread & butter case.
|
|
IAntiEvent *pae = (IAntiEvent *)(new CReplaceObjectAE(pobj));
|
|
if(!pae)
|
|
{
|
|
// We don't need to do anything else; the callmgr will discard
|
|
// undo for us.
|
|
ped->GetCallMgr()->SetOutOfMemory();
|
|
}
|
|
return pae;
|
|
}
|
|
|
|
/*
|
|
* CAntiEventDispenser::CreateResizeObjectAE (ped, pobj, size)
|
|
*
|
|
* @mfunc Creates an antievent for resizing an object
|
|
*
|
|
* @rdesc the created antievent
|
|
*/
|
|
IAntiEvent * CAntiEventDispenser::CreateResizeObjectAE(
|
|
CTxtEdit * ped, //@parm Edit context.
|
|
COleObject *pobj, //@parm Object that was resized
|
|
SIZEUV size) //@parm Old object position rectangle
|
|
{
|
|
TRACEBEGIN(TRCSUBSYSUNDO, TRCSCOPEINTERN,
|
|
"CAntiEventDispenser::CreateResizeeObjectAE");
|
|
|
|
// Always allocating is probably a reasonable strategy for objects;
|
|
// they are not expected to be the bread & butter case.
|
|
IAntiEvent *pae = (IAntiEvent *)(new CResizeObjectAE(pobj, size));
|
|
if(!pae)
|
|
{
|
|
// We don't need to do anything else; the callmgr will discard
|
|
// undo for us.
|
|
ped->GetCallMgr()->SetOutOfMemory();
|
|
}
|
|
return pae;
|
|
}
|
|
|
|
/*
|
|
* CAntiEventDispenser::CreateSelectionAE (ped, cp, cch, cpNext, cchNext)
|
|
*
|
|
* @mfunc Creates an antievent for restoring a non-degenerate selection
|
|
*
|
|
* @rdesc created antievent
|
|
*/
|
|
IAntiEvent * CAntiEventDispenser::CreateSelectionAE(
|
|
CTxtEdit *ped, //@parm Edit context
|
|
LONG cp, //@parm Active end of selection
|
|
LONG cch, //@parm Signed extension
|
|
LONG cpNext, //@parm cp to use for AE of this AE
|
|
LONG cchNext) //@parm cch to use for AE
|
|
{
|
|
// FUTURE (alexgo): improve the efficiency of this routine
|
|
IAntiEvent *pae = (IAntiEvent *)(new CSelectionAE(cp, cch, cpNext, cchNext));
|
|
if(!pae)
|
|
{
|
|
// We don't need to do anything else; the callmgr will discard
|
|
// undo for us.
|
|
ped->GetCallMgr()->SetOutOfMemory();
|
|
}
|
|
return pae;
|
|
}
|