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TF2-Source-Code/tf2_src/datamodel/undomanager.cpp at master · sr2echa/TF2-Source-Code · GitHub
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//
========= Copyright Valve Corporation, All rights reserved. ============//
//
//
Purpose:
//
//
=============================================================================
#
include
"
undomanager.h
"
#
include
"
datamodel.h
"
extern
CDataModel *g_pDataModelImp;
CUtlSymbolTableMT CUndoManager::s_UndoSymbolTable;
CUndoManager::CUndoManager
( ) :
m_bEnabled(
true
),
m_bDiscarded(
false
),
m_nMaxUndoDepth(
4096
),
m_nNesting(
0
),
m_nNotifyNesting(
0
),
m_bStreamStart(
false
),
m_bTrace(
false
),
m_bSuppressingNotify(
false
),
m_nItemsAddedSinceStartOfStream(
0
),
m_nNotifySource(
0
),
m_nNotifyFlags(
0
),
m_nChainingID(
0
),
m_PreviousChainingID(
0
)
{
}
CUndoManager::~CUndoManager
()
{
}
void
CUndoManager::Shutdown
()
{
WipeUndo
();
WipeRedo
();
}
bool
CUndoManager::InstallNotificationCallback
( IDmNotify *pNotify )
{
if
( m_Notifiers.
Find
( pNotify ) >=
0
)
return
false
;
m_Notifiers.
AddToTail
( pNotify );
return
true
;
}
void
CUndoManager::RemoveNotificationCallback
( IDmNotify *pNotify )
{
m_Notifiers.
FindAndRemove
( pNotify );
}
bool
CUndoManager::IsSuppressingNotify
( )
const
{
return
m_bSuppressingNotify;
}
void
CUndoManager::SetSuppressingNotify
(
bool
bSuppress )
{
m_bSuppressingNotify = bSuppress;
}
void
CUndoManager::Trace
(
const
char
*fmt, ... )
{
if
( !m_bTrace )
return
;
char
str[
2048
];
va_list argptr;
va_start
( argptr, fmt );
_vsnprintf
( str,
sizeof
( str ) -
1
, fmt, argptr );
va_end
( argptr );
str[
sizeof
( str ) -
1
] =
0
;
char
spaces[
128
];
Q_memset
( spaces,
0
,
sizeof
( spaces ) );
for
(
int
i =
0
; i < ( m_nNesting *
3
); ++i )
{
if
( i >=
127
)
break
;
spaces[ i ] =
'
'
;
}
Msg
(
"
%s%s
"
, spaces, str );
}
void
CUndoManager::SetUndoDepth
(
int
nMaxUndoDepth )
{
Assert
( !
HasUndoData
() );
m_nMaxUndoDepth = nMaxUndoDepth;
}
void
CUndoManager::EnableUndo
()
{
m_bEnabled =
true
;
}
void
CUndoManager::DisableUndo
()
{
m_bEnabled =
false
;
}
bool
CUndoManager::HasUndoData
()
const
{
return
m_UndoList.
Count
() !=
0
;
}
bool
CUndoManager::UndoDataDiscarded
()
const
{
return
m_bDiscarded;
}
bool
CUndoManager::HasRedoData
()
const
{
return
m_RedoStack.
Count
() >
0
;
}
void
CUndoManager::PushNotificationScope
(
const
char
*pReason,
int
nNotifySource,
int
nNotifyFlags )
{
if
( m_nNotifyNesting++ ==
0
)
{
m_pNotifyReason = pReason;
m_nNotifySource = nNotifySource;
m_nNotifyFlags = nNotifyFlags;
}
}
void
CUndoManager::PopNotificationScope
(
bool
bAbort )
{
--m_nNotifyNesting;
Assert
( m_nNotifyNesting >=
0
);
if
( m_nNotifyNesting ==
0
)
{
if
( !m_bSuppressingNotify && ( ( m_nNotifyFlags &
NOTIFY_CHANGE_MASK
) !=
0
) )
{
int
nNotifyCount = m_Notifiers.
Count
();
for
(
int
i =
0
; i < nNotifyCount; ++i )
{
m_Notifiers[i]->
NotifyDataChanged
( m_pNotifyReason, m_nNotifySource, m_nNotifyFlags );
}
}
m_nNotifySource =
0
;
m_nNotifyFlags =
0
;
}
}
void
CUndoManager::PushUndo
(
const
char
*udesc,
const
char
*rdesc,
int
nChainingID )
{
if
( !
IsEnabled
() )
return
;
Trace
(
"
[%d] Pushing undo '%s'
\n
"
, m_nNesting +
1
, udesc );
if
( m_nNesting++ ==
0
)
{
m_PreviousChainingID = m_nChainingID;
m_nChainingID = nChainingID;
m_UndoDesc = s_UndoSymbolTable.
AddString
( udesc );
m_RedoDesc = ( udesc == rdesc ) ? m_UndoDesc : s_UndoSymbolTable.
AddString
( rdesc );
m_bStreamStart =
true
;
m_nItemsAddedSinceStartOfStream =
0
;
}
}
void
CUndoManager::PushRedo
()
{
if
( !
IsEnabled
() )
return
;
Trace
(
"
[%d] Popping undo '%s'
\n
"
, m_nNesting, s_UndoSymbolTable.
String
( m_UndoDesc ) );
--m_nNesting;
Assert
( m_nNesting >=
0
);
if
( m_nNesting ==
0
)
{
if
( m_nItemsAddedSinceStartOfStream >
0
)
{
WipeRedo
();
//
Accumulate this operation into the previous "undo" operation if there is one
if
( m_nChainingID !=
0
&&
m_PreviousChainingID == m_nChainingID )
{
//
Walk undo list backward looking for previous end of stream and unmark that indicator
int
i = m_UndoList.
Tail
();
while
( i != m_UndoList.
InvalidIndex
() )
{
IUndoElement *e = m_UndoList[ i ];
if
( e && e->
IsEndOfStream
() )
{
e->
SetEndOfStream
(
false
);
break
;
}
i = m_UndoList.
Previous
( i );
}
}
}
m_nItemsAddedSinceStartOfStream =
0
;
}
}
void
CUndoManager::AbortUndoableOperation
()
{
if
( !
IsEnabled
() )
return
;
bool
hasItems = m_nItemsAddedSinceStartOfStream >
0
?
true
:
false
;
Trace
(
"
[%d] Aborting undo '%s'
\n
"
, m_nNesting, s_UndoSymbolTable.
String
( m_UndoDesc ) );
//
Close off context
PushRedo
();
if
( m_nNesting ==
0
&& hasItems )
{
Undo
();
WipeRedo
();
}
}
void
CUndoManager::WipeUndo
()
{
CDisableUndoScopeGuard sg;
FOR_EACH_LL
( m_UndoList, elem )
{
Trace
(
"
WipeUndo '%s'
\n
"
, m_UndoList[ elem ]->
GetDesc
() );
m_UndoList[ elem ]->
Release
();
}
m_UndoList.
RemoveAll
();
m_PreviousChainingID =
0
;
}
void
CUndoManager::WipeRedo
()
{
int
c = m_RedoStack.
Count
();
if
( c ==
0
)
return
;
CUtlVector< DmElementHandle_t > handles;
g_pDataModelImp->
GetInvalidHandles
( handles );
g_pDataModelImp->
MarkHandlesValid
( handles );
CDisableUndoScopeGuard sg;
for
(
int
i =
0
; i < c ; ++i )
{
IUndoElement *elem;
elem = m_RedoStack[ i ];
Trace
(
"
WipeRedo '%s'
\n
"
, elem->
GetDesc
() );
elem->
Release
();
}
m_RedoStack.
Clear
();
g_pDataModelImp->
MarkHandlesInvalid
( handles );
}
void
CUndoManager::AddUndoElement
( IUndoElement *pElement )
{
Assert
(
IsEnabled
() );
if
( !pElement )
return
;
++m_nItemsAddedSinceStartOfStream;
WipeRedo
();
/*
// For later
if ( m_UndoList.Count() >= m_nMaxUndos )
{
m_bDiscarded = true;
}
*/
Trace
(
"
AddUndoElement '%s'
\n
"
, pElement->
GetDesc
() );
m_UndoList.
AddToTail
( pElement );
if
( m_bStreamStart )
{
pElement->
SetEndOfStream
(
true
);
m_bStreamStart =
false
;
}
}
void
CUndoManager::Undo
()
{
CNotifyScopeGuard
notify
(
"
CUndoManager::Undo
"
,
NOTIFY_SOURCE_UNDO
,
NOTIFY_SETDIRTYFLAG
);
Trace
(
"
Undo
\n
======
\n
"
);
bool
saveEnabled = m_bEnabled;
m_bEnabled =
false
;
bool
bEndOfStream =
false
;
while
( !bEndOfStream && m_UndoList.
Count
() >
0
)
{
int
i = m_UndoList.
Tail
();
IUndoElement *action = m_UndoList[ i ];
Assert
( action );
Trace
(
"
%s
\n
"
, action->
GetDesc
() );
action->
Undo
();
m_RedoStack.
Push
( action );
bEndOfStream = action->
IsEndOfStream
();
m_UndoList.
Remove
( i );
}
Trace
(
"
======
\n\n
"
);
m_bEnabled = saveEnabled;
m_PreviousChainingID =
0
;
}
void
CUndoManager::Redo
()
{
CNotifyScopeGuard
notify
(
"
CUndoManager::Redo
"
,
NOTIFY_SOURCE_UNDO
,
NOTIFY_SETDIRTYFLAG
);
Trace
(
"
Redo
\n
======
\n
"
);
bool
saveEnabled = m_bEnabled;
m_bEnabled =
false
;
bool
bEndOfStream =
false
;
while
( !bEndOfStream && m_RedoStack.
Count
() >
0
)
{
IUndoElement *action =
NULL
;
m_RedoStack.
Pop
( action );
Assert
( action );
Trace
(
"
%s
\n
"
, action->
GetDesc
() );
action->
Redo
();
m_UndoList.
AddToTail
( action );
if
( m_RedoStack.
Count
() >
0
)
{
action = m_RedoStack.
Top
();
bEndOfStream = action->
IsEndOfStream
();
}
}
Trace
(
"
======
\n\n
"
);
m_bEnabled = saveEnabled;
m_PreviousChainingID =
0
;
}
const
char
*
CUndoManager::UndoDesc
()
const
{
if
( m_UndoList.
Count
() <=
0
)
return
"
"
;
int
i = m_UndoList.
Tail
();
IUndoElement *action = m_UndoList[ i ];
return
action->
UndoDesc
();
}
const
char
*
CUndoManager::RedoDesc
()
const
{
if
( m_RedoStack.
Count
() <=
0
)
{
return
"
"
;
}
IUndoElement *action = m_RedoStack.
Top
();
return
action->
RedoDesc
();
}
UtlSymId_t
CUndoManager::GetUndoDescInternal
(
const
char
*context )
{
if
( m_nNesting <=
0
)
{
static
CUtlSymbolTable s_DescErrorsTable;
static
CUtlVector< CUtlSymbol > s_DescErrors;
CUtlSymbol sym = s_DescErrorsTable.
AddString
( context );
if
( s_DescErrors.
Find
( sym ) == s_DescErrors.
InvalidIndex
() )
{
Warning
(
"
CUndoManager::GetUndoDescInternal: undoable operation missing CUndoScopeGuard in application
\n
Context( %s )
\n
"
, context );
s_DescErrors.
AddToTail
( sym );
}
return
s_UndoSymbolTable.
AddString
( context );
}
return
m_UndoDesc;
}
UtlSymId_t
CUndoManager::GetRedoDescInternal
(
const
char
*context )
{
if
( m_nNesting <=
0
)
{
//
Warning( "CUndoManager::GetRedoDescInternal: undoable operation missing CUndoScopeGuard in application\nContext( %s )", context );
return
s_UndoSymbolTable.
AddString
( context );
}
return
m_RedoDesc;
}
void
CUndoManager::GetUndoInfo
( CUtlVector< UndoInfo_t >& list )
{
//
Needs to persist after function returns...
static
CUtlSymbolTable table;
int
ops =
0
;
for
(
int
i = m_UndoList.
Tail
(); i != m_UndoList.
InvalidIndex
(); i = m_UndoList.
Previous
( i ) )
{
++ops;
IUndoElement *action = m_UndoList[ i ];
Assert
( action );
bool
bEndOfStream = action->
IsEndOfStream
();
UndoInfo_t info;
info.
undo
= action->
UndoDesc
();
info.
redo
= action->
RedoDesc
();
//
This is a hack because GetDesc() returns a static char buf[] and so the last one will clobber them all
//
So we have the requester pass in a temporary string table so we can get a ptr to a CUtlSymbol in the table
//
and use that. Sigh.
const
char
*desc = action->
GetDesc
();
CUtlSymbol sym = table.
AddString
( desc );
info.
desc
= table.
String
( sym );
info.
terminator
= bEndOfStream;
info.
numoperations
= bEndOfStream ? ops :
1
;
list.
AddToTail
( info );
if
( bEndOfStream )
{
ops =
0
;
}
}
}
void
CUndoManager::TraceUndo
(
bool
state )
{
m_bTrace = state;
}
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