0b3ff97d7d
This reverts commit da5c289a9c.
Change-Id: Ic6a77ec2cd3b502fb4e94159a0424340850590df
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103665
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
337 lines
14 KiB
C++
337 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* 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/.
|
|
*
|
|
* This file incorporates work covered by the following license notice:
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed
|
|
* with this work for additional information regarding copyright
|
|
* ownership. The ASF licenses this file to you under the Apache
|
|
* License, Version 2.0 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
|
|
*/
|
|
#ifndef INCLUDED_SVL_UNDO_HXX
|
|
#define INCLUDED_SVL_UNDO_HXX
|
|
|
|
#include <svl/svldllapi.h>
|
|
#include <rtl/ustring.hxx>
|
|
#include <tools/datetime.hxx>
|
|
#include <o3tl/strong_int.hxx>
|
|
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
typedef o3tl::strong_int<sal_Int32, struct ViewShellIdTag> ViewShellId;
|
|
typedef o3tl::strong_int<int, struct ViewShellDocIdTag> ViewShellDocId;
|
|
|
|
typedef struct _xmlTextWriter* xmlTextWriterPtr;
|
|
|
|
class SVL_DLLPUBLIC SfxRepeatTarget
|
|
{
|
|
public:
|
|
virtual ~SfxRepeatTarget() = 0;
|
|
};
|
|
|
|
|
|
class SVL_DLLPUBLIC SfxUndoContext
|
|
{
|
|
public:
|
|
virtual ~SfxUndoContext() = 0;
|
|
};
|
|
|
|
|
|
class SVL_DLLPUBLIC SfxUndoAction
|
|
{
|
|
public:
|
|
SfxUndoAction();
|
|
virtual ~SfxUndoAction() COVERITY_NOEXCEPT_FALSE;
|
|
|
|
virtual void Undo();
|
|
virtual void UndoWithContext( SfxUndoContext& i_context );
|
|
virtual void Redo();
|
|
virtual void RedoWithContext( SfxUndoContext& i_context );
|
|
virtual void Repeat(SfxRepeatTarget&);
|
|
virtual bool CanRepeat(SfxRepeatTarget&) const;
|
|
|
|
virtual bool Merge( SfxUndoAction *pNextAction );
|
|
|
|
virtual OUString GetComment() const;
|
|
virtual OUString GetRepeatComment(SfxRepeatTarget&) const;
|
|
/// ID of the view shell that created this undo action.
|
|
virtual ViewShellId GetViewShellId() const;
|
|
/// Timestamp when this undo item was created.
|
|
const DateTime& GetDateTime() const;
|
|
virtual void dumpAsXml(xmlTextWriterPtr pWriter) const;
|
|
|
|
private:
|
|
SfxUndoAction( const SfxUndoAction& ) = delete;
|
|
SfxUndoAction& operator=( const SfxUndoAction& ) = delete;
|
|
|
|
DateTime m_aDateTime;
|
|
};
|
|
|
|
|
|
/// is a mark on the Undo stack
|
|
typedef sal_Int32 UndoStackMark;
|
|
#define MARK_INVALID ::std::numeric_limits< UndoStackMark >::max()
|
|
|
|
struct MarkedUndoAction
|
|
{
|
|
std::unique_ptr<SfxUndoAction> pAction;
|
|
::std::vector< UndoStackMark > aMarks;
|
|
|
|
MarkedUndoAction(std::unique_ptr<SfxUndoAction> p) : pAction(std::move(p)) {}
|
|
};
|
|
|
|
/** do not make use of these implementation details, unless you
|
|
really really have to! */
|
|
struct SVL_DLLPUBLIC SfxUndoArray
|
|
{
|
|
std::vector<MarkedUndoAction> maUndoActions;
|
|
size_t nMaxUndoActions;
|
|
size_t nCurUndoAction;
|
|
SfxUndoArray *pFatherUndoArray;
|
|
|
|
SfxUndoArray(size_t nMax=0) :
|
|
nMaxUndoActions(nMax), nCurUndoAction(0), pFatherUndoArray(nullptr) {}
|
|
virtual ~SfxUndoArray();
|
|
|
|
SfxUndoArray& operator=( SfxUndoArray const & ) = delete; // MSVC2017 workaround
|
|
SfxUndoArray( SfxUndoArray const & ) = delete; // MSVC2017 workaround
|
|
|
|
SfxUndoAction* GetUndoAction(size_t idx) { return maUndoActions[idx].pAction.get(); }
|
|
std::unique_ptr<SfxUndoAction> Remove(int idx);
|
|
void Remove( size_t i_pos, size_t i_count );
|
|
void Insert( std::unique_ptr<SfxUndoAction> i_action, size_t i_pos );
|
|
};
|
|
|
|
|
|
/** do not make use of these implementation details, unless you
|
|
really really have to! */
|
|
class SVL_DLLPUBLIC SfxListUndoAction final : public SfxUndoAction, public SfxUndoArray
|
|
|
|
/* [Explanation]
|
|
|
|
UndoAction to composite multiple Undos in one UndoAction.
|
|
These actions are used by SfxUndomanager. With < SfxUndoManager::EnterListAction >
|
|
you can go one composite level down and with < SfxUndoManager::LeaveListAction > up again.
|
|
Redo and Undo work element wise on SfxListUndoActions.
|
|
*/
|
|
{
|
|
struct Impl;
|
|
std::unique_ptr<Impl> mpImpl;
|
|
|
|
public:
|
|
|
|
SfxListUndoAction(
|
|
const OUString &rComment, const OUString& rRepeatComment, sal_uInt16 nId, ViewShellId nViewShellId, SfxUndoArray *pFather );
|
|
virtual ~SfxListUndoAction() override;
|
|
|
|
virtual void Undo() override;
|
|
virtual void UndoWithContext( SfxUndoContext& i_context ) override;
|
|
virtual void Redo() override;
|
|
virtual void RedoWithContext( SfxUndoContext& i_context ) override;
|
|
virtual void Repeat(SfxRepeatTarget&) override;
|
|
virtual bool CanRepeat(SfxRepeatTarget&) const override;
|
|
|
|
virtual bool Merge( SfxUndoAction *pNextAction ) override;
|
|
|
|
virtual OUString GetComment() const override;
|
|
/// See SfxUndoAction::GetViewShellId().
|
|
ViewShellId GetViewShellId() const override;
|
|
virtual OUString GetRepeatComment(SfxRepeatTarget&) const override;
|
|
sal_uInt16 GetId() const;
|
|
|
|
void SetComment(const OUString& rComment);
|
|
void dumpAsXml(xmlTextWriterPtr pWriter) const override;
|
|
};
|
|
|
|
|
|
/** is a callback interface for notifications about state changes of an SfxUndoManager
|
|
*/
|
|
class SAL_NO_VTABLE SfxUndoListener
|
|
{
|
|
public:
|
|
virtual void actionUndone( const OUString& i_actionComment ) = 0;
|
|
virtual void actionRedone( const OUString& i_actionComment ) = 0;
|
|
virtual void undoActionAdded( const OUString& i_actionComment ) = 0;
|
|
virtual void cleared() = 0;
|
|
virtual void clearedRedo() = 0;
|
|
virtual void resetAll() = 0;
|
|
virtual void listActionEntered( const OUString& i_comment ) = 0;
|
|
virtual void listActionLeft( const OUString& i_comment ) = 0;
|
|
virtual void listActionCancelled() = 0;
|
|
|
|
protected:
|
|
~SfxUndoListener() {}
|
|
};
|
|
|
|
|
|
namespace svl::undo::impl
|
|
{
|
|
class UndoManagerGuard;
|
|
class LockGuard;
|
|
}
|
|
|
|
struct SfxUndoManager_Data;
|
|
class SVL_DLLPUBLIC SfxUndoManager
|
|
{
|
|
std::unique_ptr< SfxUndoManager_Data >
|
|
m_xData;
|
|
public:
|
|
static bool const CurrentLevel = true;
|
|
static bool const TopLevel = false;
|
|
|
|
SfxUndoManager( size_t nMaxUndoActionCount = 20 );
|
|
virtual ~SfxUndoManager();
|
|
|
|
void SetMaxUndoActionCount( size_t nMaxUndoActionCount );
|
|
virtual void AddUndoAction( std::unique_ptr<SfxUndoAction> pAction, bool bTryMerg=false );
|
|
virtual size_t GetUndoActionCount( bool const i_currentLevel = CurrentLevel ) const;
|
|
OUString GetUndoActionComment( size_t nNo=0, bool const i_currentLevel = CurrentLevel ) const;
|
|
SfxUndoAction* GetUndoAction( size_t nNo=0 ) const;
|
|
/// Get info about all undo actions (comment, view shell id, etc.)
|
|
OUString GetUndoActionsInfo() const;
|
|
virtual size_t GetRedoActionCount( bool const i_currentLevel = CurrentLevel ) const;
|
|
OUString GetRedoActionComment( size_t nNo=0, bool const i_currentLevel = CurrentLevel ) const;
|
|
SfxUndoAction* GetRedoAction() const;
|
|
/// Get info about all redo actions (comment, view shell id, etc.)
|
|
OUString GetRedoActionsInfo() const;
|
|
virtual bool Undo();
|
|
virtual bool Redo();
|
|
/** Clears both the Redo and the Undo stack.
|
|
Will assert and bail out when called while within a list action (<member>IsInListAction</member>).
|
|
*/
|
|
virtual void Clear();
|
|
/** Clears the Redo stack.
|
|
Will assert and bail out when called while within a list action (<member>IsInListAction</member>).
|
|
*/
|
|
virtual void ClearRedo();
|
|
/** leaves any possible open list action (<member>IsInListAction</member>), and clears both the Undo and the
|
|
Redo stack.
|
|
|
|
Effectively, calling this method is equivalent to <code>while ( IsInListAction() ) LeaveListAction();</code>,
|
|
followed by <code>Clear()</code>. The only difference to this calling sequence is that Reset is an
|
|
atomic operation, also resulting in only one notification.
|
|
*/
|
|
void Reset();
|
|
/** determines whether an Undo or Redo is currently running
|
|
*/
|
|
bool IsDoing() const;
|
|
size_t GetRepeatActionCount() const;
|
|
OUString GetRepeatActionComment( SfxRepeatTarget &rTarget) const;
|
|
bool Repeat( SfxRepeatTarget &rTarget );
|
|
bool CanRepeat( SfxRepeatTarget &rTarget ) const;
|
|
virtual void EnterListAction(const OUString &rComment, const OUString& rRepeatComment, sal_uInt16 nId, ViewShellId nViewShellId);
|
|
/** Leaves the list action entered with EnterListAction
|
|
@return the number of the sub actions in the list which has just been left. Note that in case no such
|
|
actions exist, the list action does not contribute to the Undo stack, but is silently removed.
|
|
*/
|
|
size_t LeaveListAction();
|
|
|
|
/** Leaves the list action entered with EnterListAction, and forcefully merges the previous
|
|
action on the stack into the newly created list action.
|
|
|
|
Say you have an Undo action A on the stack, then call EnterListAction, followed by one or more calls to
|
|
AddUndoAction, followed by a call to LeaveAndMergeListAction. In opposite to LeaveListAction, your Undo
|
|
stack will now still contain one undo action: the newly created list action, whose first child is the
|
|
original A, whose other children are those you added via AddUndoAction, and whose comment is the same as
|
|
the comment of A.
|
|
|
|
Effectively, this means that all actions added between EnterListAction and LeaveAndMergeListAction are
|
|
hidden from the user.
|
|
|
|
@return the number of the sub actions in the list which has just been left. Note that in case no such
|
|
actions exist, the list action does not contribute to the Undo stack, but is silently removed.
|
|
*/
|
|
size_t LeaveAndMergeListAction();
|
|
/// determines whether we're within a ListAction context, i.e. a LeaveListAction/LeaveAndMergeListAction call is pending
|
|
bool IsInListAction() const;
|
|
/// Determines how many nested list actions are currently open
|
|
size_t GetListActionDepth() const;
|
|
/** Clears the redo stack and removes the top undo action */
|
|
void RemoveLastUndoAction();
|
|
/** enables (true) or disables (false) recording of undo actions
|
|
|
|
If undo actions are added while undo is disabled, they are deleted.
|
|
Disabling undo does not clear the current undo buffer!
|
|
|
|
Multiple calls to <code>EnableUndo</code> are not cumulative. That is, calling <code>EnableUndo( false )</code>
|
|
twice, and then calling <code>EnableUndo( true )</code> means that Undo is enable afterwards.
|
|
*/
|
|
void EnableUndo( bool bEnable );
|
|
/// returns true if undo is currently enabled.
|
|
/// This returns false if undo was disabled using EnableUndo( false ) and
|
|
/// also during the runtime of the Undo() and Redo() methods.
|
|
bool IsUndoEnabled() const;
|
|
/// Adds a new listener to be notified about changes in the UndoManager's state
|
|
void AddUndoListener( SfxUndoListener& i_listener );
|
|
void RemoveUndoListener( SfxUndoListener& i_listener );
|
|
bool IsEmptyActions() const;
|
|
|
|
|
|
/** marks the current top-level element of the Undo stack, and returns a unique ID for it
|
|
*/
|
|
UndoStackMark MarkTopUndoAction();
|
|
|
|
/** removes a mark given by its ID.
|
|
After the call, the mark ID is invalid.
|
|
*/
|
|
void RemoveMark( UndoStackMark const i_mark );
|
|
|
|
/** determines whether the top action on the Undo stack has a given mark
|
|
*/
|
|
bool HasTopUndoActionMark( UndoStackMark const i_mark );
|
|
|
|
/** removes the oldest Undo actions from the stack
|
|
*/
|
|
void RemoveOldestUndoAction();
|
|
|
|
void dumpAsXml(xmlTextWriterPtr pWriter) const;
|
|
|
|
protected:
|
|
bool UndoWithContext( SfxUndoContext& i_context );
|
|
bool RedoWithContext( SfxUndoContext& i_context );
|
|
|
|
void ImplClearRedo_NoLock( bool const i_currentLevel );
|
|
|
|
/** clears all undo actions on the current level, plus all undo actions on superordinate levels,
|
|
as soon as those levels are reached.
|
|
|
|
If no list action is active currently, i.e. we're on the top level already, this method is equivalent to
|
|
->Clear.
|
|
|
|
Otherwise, the Undo actions on the current level are removed. Upon leaving the current list action, all
|
|
undo actions on the then-current level are removed, too. This is continued until the top level is reached.
|
|
*/
|
|
void ClearAllLevels();
|
|
virtual void EmptyActionsChanged();
|
|
|
|
private:
|
|
size_t ImplLeaveListAction( const bool i_merge, ::svl::undo::impl::UndoManagerGuard& i_guard );
|
|
bool ImplAddUndoAction_NoNotify( std::unique_ptr<SfxUndoAction> pAction, bool bTryMerge, bool bClearRedo, ::svl::undo::impl::UndoManagerGuard& i_guard );
|
|
void ImplClearRedo( ::svl::undo::impl::UndoManagerGuard& i_guard, bool const i_currentLevel );
|
|
void ImplClearUndo( ::svl::undo::impl::UndoManagerGuard& i_guard );
|
|
void ImplClearCurrentLevel_NoNotify( ::svl::undo::impl::UndoManagerGuard& i_guard );
|
|
size_t ImplGetRedoActionCount_Lock( bool const i_currentLevel = CurrentLevel ) const;
|
|
bool ImplIsUndoEnabled_Lock() const;
|
|
bool ImplIsInListAction_Lock() const;
|
|
void ImplEnableUndo_Lock( bool const i_enable );
|
|
|
|
bool ImplUndo( SfxUndoContext* i_contextOrNull );
|
|
bool ImplRedo( SfxUndoContext* i_contextOrNull );
|
|
void ImplCheckEmptyActions();
|
|
inline bool ImplIsEmptyActions() const;
|
|
|
|
friend class ::svl::undo::impl::LockGuard;
|
|
};
|
|
|
|
#endif
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|