--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/textrendering/textformatting/undo/EditorCommands.cpp	Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,2096 @@
+/*
+* Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#include "EditorCommands.h"
+#include "AssertFileAndLine.h"
+#include <txtetext.h>
+#include <s32ucmp.h>
+
+using namespace UndoSystem;
+
+inline TBool IsSurrogate(TText a) { return 0xD800 == (a & 0xF800); }
+inline TBool IsHighSurrogate(TText a) { return 0xD800 == (a & 0xFC00); }
+inline TBool IsLowSurrogate(TText a) { return 0xDC00 == (a & 0xFC00); }
+inline TChar JoinSurrogates(TText aHigh, TText aLow)
+	{
+	return ((aHigh - 0xd7f7) << 10) + aLow;
+	}
+
+// These roughly mirror the prototype commands, but rather than
+// referencing externally-owned (and therefore temporary) objects,
+// they own objects. Typically these are unique instances.
+
+/**
+ * Command for setting the base character and paragraph formats.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandSetBaseFormat) : public CEditorCommand
+	{
+	MUnifiedEditor&						iTarget;
+	RUniqueInstance<TTmCharFormat>	iChar;
+	RUniqueInstance<RTmParFormat>	iPar;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandSetBaseFormat(const TRepositories& aReps, MUnifiedEditor& aTarget);
+public:
+	~CEditorCommandSetBaseFormat();
+	static CEditorCommandSetBaseFormat* NewL(const TRepositories& aReps,
+		const TTmCharFormat& aCharFormat, const RTmParFormat& aParFormat,
+		MUnifiedEditor& aTarget);
+	static CEditorCommandSetBaseFormat* NewL(const TRepositories& aReps,
+		MUnifiedEditor& aTarget);
+
+	UndoSystem::CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for renaming a style.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandRenameStyle) : public CEditorCommand
+	{
+	MUnifiedEditor&				iTarget;
+	RUniqueInstance<TDes>	iOldName;
+	RUniqueInstance<TDes>	iNewName;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandRenameStyle(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iOldName(*aReps.iDes), iNewName(*aReps.iDes),
+		iRepositories(aReps) {}
+public:
+	~CEditorCommandRenameStyle();
+	static CEditorCommandRenameStyle* NewL(const TRepositories& aReps,
+		const TDesC& aOldName, const TDesC& aNewName, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for inserting a picture into the text.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandInsertPicture) : public CEditorCommand
+	{
+	MUnifiedEditor&				iTarget;
+	TInt					iPos;
+	mutable TPictureHeader	iPicture;
+	MPictureOwner*			iPictureOwner;
+	const TRepositories&	iRepositories;
+
+	CEditorCommandInsertPicture(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iRepositories(aReps) {}
+public:
+	~CEditorCommandInsertPicture();
+	static CEditorCommandInsertPicture* NewL(const TRepositories& aReps,
+		TInt aPos, MPictureOwner& aPictureOwner, MUnifiedEditor& aTarget);
+	void TakePictureOwnership(TPictureHeader&);
+	void ForgetOwner(MPictureOwner*);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for creating a new style.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandCreateStyle) : public CEditorCommand
+	{
+	MUnifiedEditor&					iTarget;
+	RUniqueInstance<TDes>			iName;
+	RUniqueInstance<TDes>			iNext;
+	RUniqueInstance<TTmCharFormat>	iChar;
+	TTmCharFormatMask				iCharMask;
+	RUniqueInstance<RTmParFormat>	iPar;
+	TTmParFormatMask				iParMask;
+	TInt							iLevel;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandCreateStyle(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iName(*aReps.iDes), iNext(*aReps.iDes),
+		iChar(*aReps.iChar),
+		iPar(*aReps.iPar), iRepositories(aReps) {}
+public:
+	~CEditorCommandCreateStyle();
+	static CEditorCommandCreateStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, const TDesC& aNext,
+		TTmCharFormat& aChar, TTmCharFormatMask aCharMask,
+		RTmParFormat& aPar, TTmParFormatMask aParMask,
+		TInt aLevel, MUnifiedEditor& aTarget);
+	static CEditorCommandCreateStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, MUnifiedEditor& aTarget);
+	static CCommand* NewBatchL(const TRepositories& aReps,
+		const TDesC& aName, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for deleting a style, removing it from anywhere that it is applied.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandDeleteStyle) : public CEditorCommand
+	{
+	MUnifiedEditor&						iTarget;
+	RUniqueInstance<TDes>				iName;
+	const TRepositories& iRepositories;
+
+	CEditorCommandDeleteStyle(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iName(*aReps.iDes), iRepositories(aReps) {}
+public:
+	~CEditorCommandDeleteStyle();
+	static CEditorCommandDeleteStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for altering the attributes of a style.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandAlterStyle) : public CEditorCommand
+	{
+	MUnifiedEditor&					iTarget;
+	RUniqueInstance<TDes>			iName;
+	RUniqueInstance<TDes>			iNext;
+	RUniqueInstance<TTmCharFormat>	iChar;
+	TTmCharFormatMask				iCharMask;
+	RUniqueInstance<RTmParFormat>	iPar;
+	TTmParFormatMask				iParMask;
+	TInt							iLevel;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandAlterStyle(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iName(*aReps.iDes), iNext(*aReps.iDes),
+		iChar(*aReps.iChar), iPar(*aReps.iPar), iRepositories(aReps) {}
+public:
+	~CEditorCommandAlterStyle();
+	static CEditorCommandAlterStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, const TDesC& aNext,
+		TTmCharFormat& aChar, TTmCharFormatMask& aCharMask,
+		RTmParFormat& aPar, TTmParFormatMask& aParMask,
+		TInt aLevel, MUnifiedEditor& aTarget);
+	static CEditorCommandAlterStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for applying an existing style to text.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandSetStyle) : public CEditorCommand
+	{
+	MUnifiedEditor&			iTarget;
+	RUniqueInstance<TDes>	iName;
+	TInt					iPos;
+	TInt					iRunLength;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandSetStyle(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iName(*aReps.iDes), iRepositories(aReps) {}
+public:
+	~CEditorCommandSetStyle();
+	static CEditorCommandSetStyle* NewL(const TRepositories& aReps,
+		const TDesC& aName, TInt aPos, TInt aRunLength,
+		MUnifiedEditor& aTarget);
+	static CCommand* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aRunLength,
+		MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for deleting text without pictures in it.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandDeleteText) : public CEditorCommand
+	{
+	TEditorDeletePlainTextImpl iImpl;
+	const TRepositories& iRepositories;		// only used in creating the inverse
+
+	CEditorCommandDeleteText*
+		CastToCEditorCommandDeleteText() { return this; }
+
+	CEditorCommandDeleteText(const TRepositories& aReps, MUnifiedEditor& aTarget,
+		TInt aPos, TInt aLength)
+		: iImpl(aTarget, aPos, aLength), iRepositories(aReps) {}
+public:
+	~CEditorCommandDeleteText();
+	static CEditorCommandDeleteText* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aLength, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+
+	// This command can be coalesced with others of the same type
+	TBool CanAdd(TInt aPos, TInt aLength, MUnifiedEditor& aTarget) const;
+	void Add(TInt aLength);
+	};
+
+/**
+ * Command for inserting text in a specified style and format.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandInsertTextAndFormat) : public CEditorCommand
+	{
+	TEditorInsertPlainTextImpl		iImpl;
+	// layer
+	RUniqueInstance<TTmCharFormat>	iChar;
+	TTmCharFormatMask				iCharMask;
+	RUniqueInstance<RTmParFormat>	iPar;
+	TTmParFormatMask				iParMask;
+	RUniqueInstance<TDes>			iStyle;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandInsertTextAndFormat*
+		CastToCEditorCommandInsertTextAndFormat() { return this; }
+	CEditorCommandInsertTextAndFormat(const TRepositories& aReps,
+		MUnifiedEditor& aTarget, TInt aPos, TDesC& aText)
+		: iImpl(aTarget, aPos, aText), iChar(*aReps.iChar), iPar(*aReps.iPar),
+		iStyle(*aReps.iDes), iRepositories(aReps) {}
+public:
+	struct RTextAndFormatParameters
+		{
+		TInt				iPos;
+		TPtrC				iText;
+		TPtrC				iStyleName;
+		TTmCharFormatLayer	iChar;
+		RTmParFormatLayer	iPar;
+
+		void Close();
+		void SetL(TInt aPos, TInt aMaxLength, MUnifiedEditor& aTarget);
+		};
+	~CEditorCommandInsertTextAndFormat();
+	static CEditorCommandInsertTextAndFormat* NewL(const TRepositories& aReps,
+		RTextAndFormatParameters& aParams, MUnifiedEditor& aTarget);
+
+	/**
+	 * Gets as much of a run as possible.
+	 */
+	static CEditorCommandInsertTextAndFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt& aRemaining, TInt aOriginalPos, MUnifiedEditor& aTarget);
+
+	/**
+	 * Gets as many runs as necessary and returns a batch if necessary.
+	 */
+	static CCommand* NewBatchL(const TRepositories& aReps,
+		TInt aPos, TInt aLength, MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+
+	// This command can be coalesced with others of the same type
+	TBool CanAdd(const RTextAndFormatParameters&, MUnifiedEditor& aTarget) const;
+	void Add(TInt aPos, const TDesC& aText);
+	};
+
+/**
+ * Command for deleting the specific character format over a run of text.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandDeleteCharFormat) : public CEditorCommand
+	{
+	MUnifiedEditor&	iTarget;
+	TInt		iPos;
+	TInt		iLength;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandDeleteCharFormat*
+		CastToCEditorCommandDeleteCharFormat() { return this; }
+
+	CEditorCommandDeleteCharFormat(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iRepositories(aReps) {}
+public:
+	~CEditorCommandDeleteCharFormat();
+	static CEditorCommandDeleteCharFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aLength,
+		MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+
+	// This command can be coalesced with others of the same type
+	TBool CanAdd(TInt aPos, TInt aLength, MUnifiedEditor& aTarget) const;
+	void Add(TInt aPos, TInt aLength);
+	};
+
+/**
+ * Command for deleting the specific paragraph format over a run of text.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandDeleteParFormat) : public CEditorCommand
+	{
+	MUnifiedEditor&	iTarget;
+	TInt		iPos;
+	TInt		iLength;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandDeleteParFormat*
+		CastToCEditorCommandDeleteParFormat() { return this; }
+
+	CEditorCommandDeleteParFormat(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iRepositories(aReps) {}
+public:
+	~CEditorCommandDeleteParFormat();
+	static CEditorCommandDeleteParFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aLength,
+		MUnifiedEditor& aTarget);
+
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+
+	// This command can be coalesced with others of the same type
+	TBool CanAdd(TInt aPos, TInt aLength, MUnifiedEditor& aTarget) const;
+	void Add(TInt aPos, TInt aLength);
+	};
+
+/**
+ * Command for applying a character format to a run of text that has no
+ * existing specific character format.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandSetCharFormat) : public CEditorCommand
+	{
+	MUnifiedEditor&						iTarget;
+	TInt							iPos;
+	TInt							iLength;
+	// layer
+	RUniqueInstance<TTmCharFormat>	iChar;
+	TTmCharFormatMask				iCharMask;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandSetCharFormat(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iChar(*aReps.iChar), iRepositories(aReps) {}
+public:
+	~CEditorCommandSetCharFormat();
+	static CEditorCommandSetCharFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aLength,
+		const TTmCharFormat* aChar, TTmCharFormatMask aCharMask,
+		MUnifiedEditor& aTarget);
+
+	// get as much of a run as possible.
+	static CEditorCommandSetCharFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt& aRemaining, MUnifiedEditor& aTarget);
+
+	// get as many runs as necessary and return a batch if necessary.
+	static CCommand* NewBatchL(const TRepositories& aReps,
+		TInt aPos, TInt aLength, MUnifiedEditor& aTarget);
+
+	TBool PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const;
+	void AddInverseToLast(CSingleCommand& aLastCommand) const;
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for applying a paragraph format to a run of text that has no
+ * existing specific paragraph format.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandSetParFormat) : public CEditorCommand
+	{
+	MUnifiedEditor&					iTarget;
+	TInt							iPos;
+	TInt							iLength;
+	// layer
+	RUniqueInstance<RTmParFormat>	iPar;
+	TTmParFormatMask				iParMask;
+
+	const TRepositories& iRepositories;
+
+	CEditorCommandSetParFormat(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iPar(*aReps.iPar), iRepositories(aReps) {}
+public:
+	~CEditorCommandSetParFormat();
+	static CEditorCommandSetParFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt aLength,
+		const RTmParFormat* aFormat, TTmParFormatMask aMask,
+		MUnifiedEditor& aTarget);
+
+	// get as much of a run as possible.
+	static CEditorCommandSetParFormat* NewL(const TRepositories& aReps,
+		TInt aPos, TInt& aRemaining, MUnifiedEditor& aTarget);
+
+	// get as many runs as necessary and return a batch if necessary.
+	static CCommand* NewBatchL(const TRepositories& aReps,
+		TInt aPos, TInt aLength, MUnifiedEditor& aTarget);
+
+	TBool PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const;
+	void AddInverseToLast(CSingleCommand& aLastCommand) const;
+	CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+/**
+ * Command for deleting a picture from the text. The picture is assumed
+ * to be without significant formatting.
+ *
+ * @internalComponent
+ * @since App-frameworks6.1
+ */
+NONSHARABLE_CLASS(CEditorCommandDeletePicture) : public CEditorCommand,
+	private MPictureOwner
+	{
+	MUnifiedEditor&							iTarget;
+	TInt									iPos;
+	const TRepositories&					iRepositories;
+	/**
+	 * Will own picture after us.
+	 */
+	mutable CEditorCommandInsertPicture*	iPictureOwnerDelegate;
+
+	void ForgetDelegate();
+	CEditorCommandDeletePicture(const TRepositories& aReps, MUnifiedEditor& aTarget)
+		: iTarget(aTarget), iRepositories(aReps) {}
+public:
+	~CEditorCommandDeletePicture();
+	static CEditorCommandDeletePicture* NewL(const TRepositories& aReps,
+		TInt aPos, MUnifiedEditor& aTarget);
+
+	UndoSystem::CCommand* CreateInverseL() const;
+	TInt ExecuteL() const;
+	};
+
+///////////////////////////////////
+//								 //
+//	CEditorCommandSetBaseFormat  //
+//								 //
+///////////////////////////////////
+
+CEditorCommandSetBaseFormat::CEditorCommandSetBaseFormat(
+	const TRepositories& aReps, MUnifiedEditor& aTarget)
+	: iTarget(aTarget), iChar(*aReps.iChar), iPar(*aReps.iPar),
+	iRepositories(aReps)
+	{
+	}
+
+CEditorCommandSetBaseFormat::~CEditorCommandSetBaseFormat()
+	{
+	iChar.Close();
+	iPar.Close();
+	}
+
+CEditorCommandSetBaseFormat* CEditorCommandSetBaseFormat::NewL(
+	const TRepositories& aReps,
+	const TTmCharFormat& aCharFormat, const RTmParFormat& aParFormat,
+	MUnifiedEditor& aTarget)
+	{
+	CEditorCommandSetBaseFormat* r
+		= new(ELeave) CEditorCommandSetBaseFormat(aReps, aTarget);
+	CleanupStack::PushL(r);
+	r->iChar.TakeCopyL(&aCharFormat);
+	r->iPar.TakeCopyL(&aParFormat);
+	CleanupStack::Pop();
+	return r;
+	}
+
+CEditorCommandSetBaseFormat* CEditorCommandSetBaseFormat::NewL(
+	const TRepositories& aReps, MUnifiedEditor& aTarget)
+	{
+	TTmCharFormat c;
+	RTmParFormat p;
+	CleanupClosePushL(p);
+	aTarget.GetBaseFormatL(c, p);
+	CEditorCommandSetBaseFormat* r = NewL(aReps, c, p, aTarget);
+	CleanupStack::PopAndDestroy();
+	return r;
+	}
+
+CCommand* CEditorCommandSetBaseFormat::CreateInverseL() const
+	{
+	return NewL(iRepositories, iTarget);
+	}
+
+TInt CEditorCommandSetBaseFormat::ExecuteL() const
+	{
+	iTarget.SetBaseFormatL(*iChar.Peek(), *iPar.Peek());
+	return KErrNone;
+	}
+
+/////////////////////////////////
+//							   //
+//	CEditorCommandRenameStyle  //
+//							   //
+/////////////////////////////////
+
+CEditorCommandRenameStyle::~CEditorCommandRenameStyle()
+	{
+	iOldName.Close();
+	iNewName.Close();
+	}
+
+CEditorCommandRenameStyle* CEditorCommandRenameStyle::NewL(
+	const TRepositories& aReps,
+	const TDesC& aOldName, const TDesC& aNewName, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandRenameStyle* r =
+		new(ELeave) CEditorCommandRenameStyle(aReps, aTarget);
+	CleanupStack::PushL(r);
+	r->iOldName.TakeCopyL(&aOldName);
+	r->iNewName.TakeCopyL(&aNewName);
+	CleanupStack::Pop(r);
+	return r;
+	}
+
+CCommand* CEditorCommandRenameStyle::CreateInverseL() const
+	{
+	return NewL(iRepositories, *iNewName.Peek(), *iOldName.Peek(), iTarget);
+	}
+
+TInt CEditorCommandRenameStyle::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->RenameStyleL(*iOldName.Peek(), *iNewName.Peek());
+	}
+
+///////////////////////////////////
+//								 //
+//	CEditorCommandInsertPicture  //
+//								 //
+///////////////////////////////////
+
+CEditorCommandInsertPicture::~CEditorCommandInsertPicture()
+	{
+	if (iPictureOwner)
+		iPictureOwner->ForgetDelegate();
+	iPicture.DeletePicture();
+	}
+
+CEditorCommandInsertPicture* CEditorCommandInsertPicture::NewL(
+	const TRepositories& aReps,
+	TInt aPos, MPictureOwner& aPictureOwner, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandInsertPicture* r = new(ELeave)
+		CEditorCommandInsertPicture(aReps, aTarget);
+	r->iPictureOwner = &aPictureOwner;
+	r->iPos = aPos;
+	return r;
+	}
+
+void CEditorCommandInsertPicture::TakePictureOwnership(TPictureHeader& aPic)
+	{
+	iPicture = aPic;
+	iPictureOwner = 0;
+	}
+
+void CEditorCommandInsertPicture::ForgetOwner(MPictureOwner*
+#ifdef _DEBUG
+	aOwner
+#endif
+	)
+	{
+	ASSERT(aOwner == iPictureOwner);
+	iPictureOwner = 0;
+	}
+
+CCommand* CEditorCommandInsertPicture::CreateInverseL() const
+	{
+	return CEditorCommandDeletePicture::NewL(iRepositories, iPos, iTarget);
+	}
+
+TInt CEditorCommandInsertPicture::ExecuteL() const
+	{
+	ASSERT(iPictureOwner == 0);
+	MUnifiedEditor::MPictureSupport* pi = iTarget.PictureSupport();
+	ASSERT(pi);
+	pi->InsertPictureL(iPos, iPicture);
+	iPicture.iPicture = 0;
+	iPicture.iPictureType = KNullUid;
+	return KErrNone;
+	}
+
+
+///////////////////////////////////
+//								 //
+//	CEditorCommandDeletePicture  //
+//								 //
+///////////////////////////////////
+
+CEditorCommandDeletePicture::~CEditorCommandDeletePicture()
+	{
+	if (iPictureOwnerDelegate)
+		iPictureOwnerDelegate->ForgetOwner(this);
+	}
+
+void CEditorCommandDeletePicture::ForgetDelegate()
+	{
+	iPictureOwnerDelegate = 0;
+	}
+
+CEditorCommandDeletePicture* CEditorCommandDeletePicture::NewL(
+	const TRepositories& aReps, TInt aPos, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandDeletePicture* r =
+		new(ELeave) CEditorCommandDeletePicture(aReps, aTarget);
+	r->iPos = aPos;
+	return r;
+	}
+
+CCommand* CEditorCommandDeletePicture::CreateInverseL() const
+	{
+	CEditorCommandDeletePicture* nonConstThis =
+		const_cast<CEditorCommandDeletePicture*>(this);	//yuck
+	CEditorCommandInsertPicture* inv =
+		CEditorCommandInsertPicture::NewL(iRepositories, iPos,
+		*nonConstThis, iTarget);
+	CleanupStack::PushL(inv);
+
+	if (iPictureOwnerDelegate)
+		iPictureOwnerDelegate->ForgetOwner(nonConstThis);
+
+	iPictureOwnerDelegate = inv;
+	CleanupStack::Pop(inv);
+
+	return inv;
+	}
+
+TInt CEditorCommandDeletePicture::ExecuteL() const
+	{
+	MUnifiedEditor::MPictureSupport* pi = iTarget.PictureSupport();
+	ASSERT(pi);
+	TPictureHeader pic;
+	pi->Picture(iPos, pic);
+	pi->DropPictureL(iPos);
+	if (iPictureOwnerDelegate)
+		{
+		iPictureOwnerDelegate->TakePictureOwnership(pic);
+		iPictureOwnerDelegate = 0;
+		}
+	else
+		pic.DeletePicture();
+	return KErrNone;
+	}
+
+/////////////////////////////////
+//							   //
+//	CEditorCommandCreateStyle  //
+//							   //
+/////////////////////////////////
+
+CEditorCommandCreateStyle* CEditorCommandCreateStyle::NewL(const TRepositories& aReps,
+ 		const TDesC& aName, const TDesC& aNext,
+		TTmCharFormat& aChar, TTmCharFormatMask aCharMask,
+		RTmParFormat& aPar, TTmParFormatMask aParMask,
+		TInt aLevel, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandCreateStyle* p = new(ELeave) CEditorCommandCreateStyle(aReps, aTarget);
+	CleanupStack::PushL(p);
+	p->iName.TakeCopyL(&aName);
+	p->iNext.TakeCopyL(&aNext);
+	p->iChar.TakeCopyL(&aChar);
+	p->iCharMask = aCharMask;
+	p->iPar.TakeCopyL(&aPar);
+	p->iParMask = aParMask;
+	p->iLevel = aLevel;
+	CleanupStack::Pop(p);
+	return p;
+	}
+CEditorCommandCreateStyle* CEditorCommandCreateStyle::NewL(const TRepositories& aReps,
+	const TDesC& aName, MUnifiedEditor& aTarget)
+	{
+	RTmStyle style;
+	MUnifiedEditor::MStyleSupport* si = aTarget.StyleSupport();
+	ASSERT(si);
+	si->GetStyleByNameL(aName, style);
+	CleanupClosePushL(style);
+	CEditorCommandCreateStyle* p = NewL(aReps, aName, style.iNextStyleName,
+		style.iCharFormat.iFormat, style.iCharFormat.iMask,
+		style.iParFormat.iFormat, style.iParFormat.iMask,
+		style.iOutlineLevel, aTarget);
+	CleanupStack::PopAndDestroy();
+	return p;
+	}
+
+CCommand* CEditorCommandCreateStyle::NewBatchL(const TRepositories& aReps,
+											   const TDesC& aName,
+											   MUnifiedEditor& aTarget)
+	{
+	CCommand* inverse = 0;
+	MUnifiedEditor::MStyleSupport* si = aTarget.StyleSupport();
+	ASSERT(si);
+
+	TInt remainingLength = aTarget.DocumentLength();
+	TInt currentPosition = 0;
+	// got to be careful.. GetStyleL() can return KMaxTInt as the run length!
+	// luckily, any nonnegative TInt - KMaxTInt gives a negative TInt
+	while (0 < remainingLength)
+		{
+		TInt runLength;
+		TPtrC name;
+		si->GetStyle(currentPosition, name, runLength);
+		if (name == aName)
+			{
+			CleanupStack::PushL(inverse);
+	// coverity[double_free]
+			inverse = CoalesceL(inverse,
+				CEditorCommandSetStyle::NewL(aReps, aName,
+					currentPosition, runLength, aTarget));
+			CleanupStack::Pop();
+			}
+		currentPosition += runLength;
+		remainingLength -= runLength;
+		}
+
+	CleanupStack::PushL(inverse);
+	// coverity[double_free]
+	inverse = CoalesceL(inverse,
+		CEditorCommandCreateStyle::NewL(aReps, aName, aTarget));
+	CleanupStack::Pop();
+	return inverse;
+	}
+
+CEditorCommandCreateStyle::~CEditorCommandCreateStyle()
+	{
+	iName.Close();
+	iNext.Close();
+	iChar.Close();
+	iPar.Close();
+	}
+
+CCommand* CEditorCommandCreateStyle::CreateInverseL() const
+	{
+	return CEditorCommandDeleteStyle::NewL(iRepositories, *iName.Peek(), iTarget);
+	}
+
+TInt CEditorCommandCreateStyle::ExecuteL() const
+	{
+	RTmStyle style;
+	CleanupClosePushL(style);
+	style.iName = *iName.Peek();
+	style.iNextStyleName = *iNext.Peek();
+	style.iCharFormat.iFormat = *iChar.Peek();
+	style.iCharFormat.iMask = iCharMask;
+	style.iParFormat.iFormat.CopyL( *iPar.Peek() );
+	style.iParFormat.iMask.iFlags = iParMask.iFlags;
+	style.iOutlineLevel = iLevel;
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	TInt err = si->CreateStyleL(style);
+	CleanupStack::PopAndDestroy();
+	return err;
+	}
+
+/////////////////////////////////
+//							   //
+//	CEditorCommandDeleteStyle  //
+//							   //
+/////////////////////////////////
+
+CEditorCommandDeleteStyle* CEditorCommandDeleteStyle::NewL(const TRepositories& aReps,
+ 		const TDesC& aName, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandDeleteStyle* p = new(ELeave) CEditorCommandDeleteStyle(aReps, aTarget);
+	CleanupStack::PushL(p);
+	p->iName.TakeCopyL(&aName);
+	CleanupStack::Pop(p);
+	return p;
+	}
+
+CEditorCommandDeleteStyle::~CEditorCommandDeleteStyle()
+	{
+	iName.Close();
+	}
+
+CCommand* CEditorCommandDeleteStyle::CreateInverseL() const
+	{
+	return CEditorCommandCreateStyle::NewBatchL(iRepositories, *iName.Peek(), iTarget);
+	}
+
+TInt CEditorCommandDeleteStyle::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->DeleteStyleL(*iName.Peek());
+	}
+
+////////////////////////////////
+//							  //
+//	CEditorCommandAlterStyle  //
+//							  //
+////////////////////////////////
+
+CEditorCommandAlterStyle* CEditorCommandAlterStyle::NewL(const TRepositories& aReps,
+ 		const TDesC& aName, const TDesC& aNext,
+		TTmCharFormat& aChar, TTmCharFormatMask& aCharMask,
+		RTmParFormat& aPar, TTmParFormatMask& aParMask,
+		TInt aLevel, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandAlterStyle* p = new(ELeave) CEditorCommandAlterStyle(aReps, aTarget);
+	CleanupStack::PushL(p);
+	p->iName.TakeCopyL(&aName);
+	p->iNext.TakeCopyL(&aNext);
+	p->iChar.TakeCopyL(&aChar);
+	p->iCharMask = aCharMask;
+	p->iPar.TakeCopyL(&aPar);
+	p->iParMask = aParMask;
+	p->iLevel = aLevel;
+	CleanupStack::Pop(p);
+	return p;
+	}
+
+CEditorCommandAlterStyle* CEditorCommandAlterStyle::NewL(const TRepositories& aReps,
+	const TDesC& aName, MUnifiedEditor& aTarget)
+	{
+	RTmStyle style;
+	CleanupClosePushL(style);
+	MUnifiedEditor::MStyleSupport* si = aTarget.StyleSupport();
+	ASSERT(si);
+	si->GetStyleByNameL(aName, style);
+	CEditorCommandAlterStyle* p = NewL(aReps, aName, style.iNextStyleName,
+		style.iCharFormat.iFormat, style.iCharFormat.iMask,
+		style.iParFormat.iFormat, style.iParFormat.iMask,
+		style.iOutlineLevel, aTarget);
+	CleanupStack::PopAndDestroy();
+	return p;
+	}
+
+CEditorCommandAlterStyle::~CEditorCommandAlterStyle()
+	{
+	iName.Close();
+	iNext.Close();
+	iChar.Close();
+	iPar.Close();
+	}
+
+CCommand* CEditorCommandAlterStyle::CreateInverseL() const
+	{
+	return NewL(iRepositories, *iName.Peek(), iTarget);
+	}
+
+TInt CEditorCommandAlterStyle::ExecuteL() const
+	{
+	RTmStyle style;
+	CleanupClosePushL(style);
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	si->GetStyleByNameL(*iName.Peek(), style);
+	style.iCharFormat.iFormat	= *iChar.Peek();
+	style.iCharFormat.iMask		= iCharMask;
+	style.iParFormat.iFormat.CopyL( *iPar.Peek() );
+	style.iParFormat.iMask		= iParMask;
+	style.iOutlineLevel			= iLevel;
+	style.iName					= *iName.Peek();
+	style.iNextStyleName		= *iNext.Peek();
+	TInt err = si->ChangeStyleL(style);
+	CleanupStack::PopAndDestroy();
+	return err;
+	}
+
+//////////////////////////////
+//							//
+//	CEditorCommandSetStyle  //
+//							//
+//////////////////////////////
+
+CEditorCommandSetStyle::~CEditorCommandSetStyle()
+	{
+	iName.Close();
+	}
+
+CEditorCommandSetStyle* CEditorCommandSetStyle::NewL(const TRepositories& aReps,
+	const TDesC& aName, TInt aPos, TInt aRunLength, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandSetStyle* r = new (ELeave) CEditorCommandSetStyle(aReps, aTarget);
+	CleanupStack::PushL(r);
+	r->iName.TakeCopyL(&aName);
+	r->iPos = aPos;
+	r->iRunLength = aRunLength;
+	CleanupStack::Pop(r);
+	return r;
+	}
+
+CCommand* CEditorCommandSetStyle::NewL(
+	const TRepositories& aReps, TInt aPos, TInt aRunLength, MUnifiedEditor& aTarget)
+	{
+	CCommand* inverse = 0;
+	MUnifiedEditor::MStyleSupport* si = aTarget.StyleSupport();
+	ASSERT(si);
+	while (0 < aRunLength)
+		{
+		TPtrC name;
+		TInt runLength;
+		si->GetStyle(aPos, name, runLength);
+		if (aRunLength < runLength)
+			runLength = aRunLength;
+		CleanupStack::PushL(inverse);
+		// coverity[double_free]
+		inverse = CoalesceL(inverse, NewL(aReps, name, aPos, runLength, aTarget));
+		CleanupStack::Pop();
+		aPos += runLength;
+		aRunLength -= runLength;
+		}
+	return inverse;
+	}
+
+CCommand* CEditorCommandSetStyle::CreateInverseL() const
+	{
+	return NewL(iRepositories, iPos, iRunLength, iTarget);
+	}
+
+TInt CEditorCommandSetStyle::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->SetStyleL(iPos, iRunLength, *iName.Peek());
+	}
+
+////////////////////////////////
+//							  //
+//	CEditorCommandDeleteText  //
+//							  //
+////////////////////////////////
+
+CEditorCommandDeleteText::~CEditorCommandDeleteText() {}
+
+CEditorCommandDeleteText* CEditorCommandDeleteText::NewL(const TRepositories& aReps,
+	TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	return new(ELeave) CEditorCommandDeleteText(aReps,
+		aTarget, aPos, aLength);
+	}
+
+CCommand* CEditorCommandDeleteText::CreateInverseL() const
+	{
+	return CEditorCommandInsertTextAndFormat::NewBatchL(
+		iRepositories, iImpl.Pos(), iImpl.Length(), iImpl.Target());
+	}
+
+TInt CEditorCommandDeleteText::ExecuteL() const
+	{
+	return iImpl.ExecuteL();
+	}
+
+TBool CEditorCommandDeleteText::CanAdd(TInt aPos, TInt aLength, MUnifiedEditor& aTarget) const
+	{
+	return iImpl.CanAdd(aPos, aLength, aTarget);
+	}
+
+void CEditorCommandDeleteText::Add(TInt aLength)
+	{
+	iImpl.Add(aLength);
+	}
+
+/////////////////////////////////////////
+//									   //
+//	CEditorCommandInsertTextAndFormat  //
+//									   //
+/////////////////////////////////////////
+
+CEditorCommandInsertTextAndFormat::~CEditorCommandInsertTextAndFormat()
+	{
+	iChar.Close();
+	iPar.Close();
+	iStyle.Close();
+	}
+
+CEditorCommandInsertTextAndFormat* CEditorCommandInsertTextAndFormat::NewL(
+	const TRepositories& aReps,
+	CEditorCommandInsertTextAndFormat::RTextAndFormatParameters& aParams,
+	MUnifiedEditor& aTarget)
+	{
+	ASSERT(aParams.iText.Length() <= KMaxCharsInSingleCommand);
+	CEditorCommandInsertTextAndFormat* r = new(ELeave)
+		CEditorCommandInsertTextAndFormat(aReps, aTarget, aParams.iPos, aParams.iText);
+	CleanupStack::PushL(r);
+	r->iChar.TakeCopyL(&aParams.iChar.iFormat);
+	r->iCharMask = aParams.iChar.iMask;
+	r->iPar.TakeCopyL(&aParams.iPar.iFormat);
+	r->iParMask.iFlags = aParams.iPar.iMask.iFlags;
+	r->iStyle.TakeCopyL(&aParams.iStyleName);
+	CleanupStack::Pop(r);
+	return r;
+	}
+
+void CEditorCommandInsertTextAndFormat::RTextAndFormatParameters::Close()
+	{
+	iPar.Close();
+	}
+
+void CEditorCommandInsertTextAndFormat::RTextAndFormatParameters::SetL(
+	TInt aPos, TInt aMaxLength, MUnifiedEditor& aTarget)
+	{
+	iPos = aPos;
+	aTarget.GetText(aPos, iText);
+
+	TInt length = iText.Length();
+
+	TInt charLength;
+	aTarget.GetCharFormat(aPos, MUnifiedEditor::ESpecific, iChar, charLength);
+
+	TInt parLength;
+	aTarget.GetParFormatL(aPos, MUnifiedEditor::ESpecific, iPar, parLength);
+
+	TInt styleLength = length;
+	MUnifiedEditor::MStyleSupport* si = aTarget.StyleSupport();
+	if (si)
+		si->GetStyle(aPos, iStyleName, styleLength);
+	else
+		iStyleName.Set(TPtrC());
+
+	if (charLength < length)
+		length = charLength;
+	if (parLength < length)
+		length = parLength;
+	if (styleLength < length)
+		length = styleLength;
+	if (aMaxLength < length)
+		length = aMaxLength;
+	if (KMaxCharsInSingleCommand < length)
+		length = KMaxCharsInSingleCommand;
+	iText.Set(iText.Ptr(), length);
+	}
+
+CEditorCommandInsertTextAndFormat* CEditorCommandInsertTextAndFormat::NewL(
+	const TRepositories& aReps, TInt aPos, TInt& aRemaining,
+	TInt aOriginalPos, MUnifiedEditor& aTarget)
+	{
+	RTextAndFormatParameters params;
+	CleanupClosePushL(params);
+	params.SetL(aPos, aRemaining, aTarget);
+
+	params.iPos = aOriginalPos;
+	CEditorCommandInsertTextAndFormat* p = NewL(aReps, params, aTarget);
+	aRemaining -= params.iText.Length();
+
+	CleanupStack::PopAndDestroy();
+
+	return p;
+	}
+
+CCommand* CEditorCommandInsertTextAndFormat::NewBatchL(const TRepositories& aReps,
+	TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	CCommand* command = 0;
+	TInt oldLength = aLength + 1;
+	TInt end = aPos + aLength;
+	// while there is still some length to go and there is still some
+	// text to be got
+	while (0 < aLength && aLength < oldLength)
+		{
+		oldLength = aLength;
+		CleanupStack::PushL(command);
+		// coverity[double_free]
+		command = CoalesceL(command,
+			NewL(aReps, end - aLength, aLength, aPos, aTarget));
+		CleanupStack::Pop();
+		}
+
+	return command;
+	}
+
+CCommand* CEditorCommandInsertTextAndFormat::CreateInverseL() const
+	{
+	return CEditorCommandDeleteText::NewL(iRepositories,
+		iImpl.Pos(), iImpl.Text().Length(), iImpl.Target());
+	}
+
+TInt CEditorCommandInsertTextAndFormat::ExecuteL() const
+	{
+	TTmCharFormatLayer charLayer;
+	RTmParFormatLayer parLayer;
+
+	TTmCharFormatLayer* pCharLayer = 0;
+	RTmParFormatLayer* pParLayer = 0;
+
+	if (iChar.Peek())
+		{
+		charLayer.iFormat = *iChar.Peek();
+		charLayer.iMask = iCharMask;
+		pCharLayer = &charLayer;
+		}
+	if (iPar.Peek())
+		{
+		parLayer.iFormat.CopyL( *iPar.Peek() );
+		parLayer.iMask = iParMask;
+		pParLayer = &parLayer;
+		CleanupClosePushL(parLayer);
+		}
+	TInt result = iImpl.ExecuteL(iStyle.Peek(), pCharLayer, pParLayer);
+	if (pParLayer)
+		CleanupStack::PopAndDestroy();
+	return result;
+	}
+
+TBool CEditorCommandInsertTextAndFormat::CanAdd(
+	const CEditorCommandInsertTextAndFormat::RTextAndFormatParameters& aParams,
+	MUnifiedEditor& aTarget) const
+	{
+	if (!iImpl.CanAdd(aParams.iPos, aParams.iText, aTarget))
+		return EFalse;
+	if (!iChar.Peek())
+		return EFalse;
+	if (!iPar.Peek())
+		return EFalse;
+	if (!iStyle.Peek())
+		return EFalse;
+	if (aParams.iStyleName != *iStyle.Peek())
+		return EFalse;
+	if (aParams.iPar.iMask.iFlags != iParMask.iFlags
+		|| aParams.iPar.iFormat != *iPar.Peek())
+		return EFalse;
+	if (iCharMask.iFlags != aParams.iChar.iMask.iFlags
+		|| aParams.iChar.iFormat != *iChar.Peek())
+		return EFalse;
+	// coalescence is not possible if the new text contains pictures.
+	if (0 <= UndoSystem::FindPicture(aTarget, aParams.iPos, aParams.iText.Length()))
+		return EFalse;
+	return ETrue;
+	}
+
+void CEditorCommandInsertTextAndFormat::Add(TInt aPos, const TDesC& aText)
+	{
+	iImpl.Add(aPos, aText);
+	}
+
+///////////////////////////////////
+//								 //
+//	CEditorCommandSetCharFormat  //
+//								 //
+///////////////////////////////////
+
+CEditorCommandSetCharFormat::~CEditorCommandSetCharFormat()
+	{
+	iChar.Close();
+	}
+
+CEditorCommandSetCharFormat* CEditorCommandSetCharFormat::NewL(
+	const TRepositories& aReps, TInt aPos, TInt aLength,
+	const TTmCharFormat* aChar, TTmCharFormatMask aCharMask,
+	MUnifiedEditor& aTarget)
+	{
+	CEditorCommandSetCharFormat* r = new(ELeave) CEditorCommandSetCharFormat(aReps, aTarget);
+	CleanupStack::PushL(r);
+	r->iPos		= aPos;
+	r->iLength	= aLength;
+	r->iChar.TakeCopyL(aChar);
+	r->iCharMask= aCharMask;
+	CleanupStack::Pop(r);
+	return r;
+	}
+
+// get as much of a run as possible.
+CEditorCommandSetCharFormat* CEditorCommandSetCharFormat::NewL(const TRepositories& aReps,
+	TInt aPos, TInt& aRemaining, MUnifiedEditor& aTarget)
+	{
+	TTmCharFormatLayer format;
+	TInt length;
+	aTarget.GetCharFormat(aPos, MUnifiedEditor::ESpecific, format, length);
+	if (aRemaining < length)
+		length = aRemaining;
+	CEditorCommandSetCharFormat* r =
+		NewL(aReps, aPos, length, &format.iFormat, format.iMask, aTarget);
+	aRemaining -= length;
+	return r;
+	}
+
+// get as many runs as necessary and return a batch if necessary.
+CCommand* CEditorCommandSetCharFormat::NewBatchL(const TRepositories& aReps,
+	TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	CCommand* command = 0;
+	TInt oldLength = aLength + 1;
+	TInt end = aPos + aLength;
+	while (0 < aLength && aLength < oldLength)
+		{
+		oldLength = aLength;
+		CleanupStack::PushL(command);
+		// coverity[double_free]
+		command = CoalesceL(command, NewL(aReps, end - aLength, aLength, aTarget));
+		CleanupStack::Pop();		// command, as was before call to CoalesceL
+		}
+	return command;
+	}
+
+CCommand* CEditorCommandSetCharFormat::CreateInverseL() const
+	{
+	return CEditorCommandDeleteCharFormat::NewL(iRepositories, iPos, iLength, iTarget);
+	}
+
+TInt CEditorCommandSetCharFormat::ExecuteL() const
+	{
+	TTmCharFormatLayer layer;
+	layer.iFormat = *iChar.Peek();
+	layer.iMask = iCharMask;
+	iTarget.SetCharFormatL(iPos, iLength, layer);
+	return 0;
+	}
+
+TBool CEditorCommandSetCharFormat::PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const
+	{
+	if (aLastCommand.FamilyUid() != TUid::Uid(KUndoDllUid))
+		return EFalse;
+	CEditorCommandDeleteCharFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteCharFormat();
+	if (!last)
+		return EFalse;
+	return last->CanAdd(iPos, iLength, iTarget);
+	}
+
+void CEditorCommandSetCharFormat::AddInverseToLast(CSingleCommand& aLastCommand) const
+	{
+	ASSERT(aLastCommand.FamilyUid() == TUid::Uid(KUndoDllUid));
+	CEditorCommandDeleteCharFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteCharFormat();
+	ASSERT(last);
+	last->Add(iPos, iLength);
+	}
+
+//////////////////////////////////
+//								//
+//	CEditorCommandSetParFormat  //
+//								//
+//////////////////////////////////
+
+CEditorCommandSetParFormat::~CEditorCommandSetParFormat()
+	{
+	iPar.Close();
+	}
+
+CEditorCommandSetParFormat* CEditorCommandSetParFormat::NewL(
+	const TRepositories& aReps, TInt aPos, TInt aLength,
+	const RTmParFormat* aFormat, TTmParFormatMask aMask,
+	MUnifiedEditor& aTarget)
+	{
+	CEditorCommandSetParFormat* r = new(ELeave) CEditorCommandSetParFormat(aReps, aTarget);
+	CleanupStack::PushL(r);
+	r->iPos		= aPos;
+	r->iLength	= aLength;
+	r->iPar.TakeCopyL(aFormat);
+	r->iParMask= aMask;
+	CleanupStack::Pop(r);
+	return r;
+	}
+
+// get as much of a run as possible.
+CEditorCommandSetParFormat* CEditorCommandSetParFormat::NewL(const TRepositories& aReps,
+	TInt aPos, TInt& aRemaining, MUnifiedEditor& aTarget)
+	{
+	RTmParFormatLayer format;
+	TInt length;
+	CleanupClosePushL(format);
+	aTarget.GetParFormatL(aPos, MUnifiedEditor::ESpecific, format, length);
+	if (aRemaining < length)
+		length = aRemaining;
+	CEditorCommandSetParFormat* r =
+		NewL(aReps, aPos, length, &format.iFormat, format.iMask, aTarget);
+	aRemaining -= length;
+	CleanupStack::PopAndDestroy();	// format
+	return r;
+	}
+
+// get as many runs as necessary and return a batch if necessary.
+CCommand* CEditorCommandSetParFormat::NewBatchL(const TRepositories& aReps,
+	TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	CCommand* command = 0;
+	TInt oldLength = aLength + 1;
+	TInt end = aPos + aLength;
+	while (0 < aLength && aLength < oldLength)
+		{
+		oldLength = aLength;
+		CleanupStack::PushL(command);
+		// coverity[double_free]
+		command = CoalesceL(command, NewL(aReps, end - aLength, aLength, aTarget));
+		CleanupStack::Pop();		// command, as was before call to CoalesceL
+		}
+	return command;
+	}
+
+CCommand* CEditorCommandSetParFormat::CreateInverseL() const
+	{
+	return CEditorCommandDeleteParFormat::NewL(iRepositories, iPos, iLength, iTarget);
+	}
+
+TInt CEditorCommandSetParFormat::ExecuteL() const
+	{
+	RTmParFormatLayer layer;
+	CleanupClosePushL(layer);
+	layer.iFormat.CopyL(*iPar.Peek());
+	layer.iMask = iParMask;
+	iTarget.SetParFormatL(iPos, iLength, layer);
+	CleanupStack::PopAndDestroy();
+	return 0;
+	}
+
+TBool CEditorCommandSetParFormat::PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const
+	{
+	if (aLastCommand.FamilyUid() != TUid::Uid(KUndoDllUid))
+		return EFalse;
+	CEditorCommandDeleteParFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteParFormat();
+	if (!last)
+		return EFalse;
+	return last->CanAdd(iPos, iLength, iTarget);
+	}
+
+void CEditorCommandSetParFormat::AddInverseToLast(CSingleCommand& aLastCommand) const
+	{
+	ASSERT(aLastCommand.FamilyUid() == TUid::Uid(KUndoDllUid));
+	CEditorCommandDeleteParFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteParFormat();
+	ASSERT(last);
+	last->Add(iPos, iLength);
+	}
+
+//////////////////////////////////////
+//									//
+//	CEditorCommandDeleteCharFormat  //
+//									//
+//////////////////////////////////////
+
+CEditorCommandDeleteCharFormat::~CEditorCommandDeleteCharFormat() {}
+
+CEditorCommandDeleteCharFormat* CEditorCommandDeleteCharFormat::NewL(
+	const TRepositories& aReps, TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandDeleteCharFormat* r =
+		new(ELeave) CEditorCommandDeleteCharFormat(aReps, aTarget);
+	r->iPos = aPos;
+	r->iLength = aLength;
+	return r;
+	}
+
+CCommand* CEditorCommandDeleteCharFormat::CreateInverseL() const
+	{
+	return CEditorCommandSetCharFormat::NewBatchL(iRepositories, iPos, iLength, iTarget);
+	}
+
+TInt CEditorCommandDeleteCharFormat::ExecuteL() const
+	{
+	iTarget.DeleteCharFormatL(iPos, iLength);
+	return KErrNone;
+	}
+
+TBool CEditorCommandDeleteCharFormat::CanAdd(TInt aPos, TInt aLength, MUnifiedEditor &aTarget) const
+	{
+	return &aTarget == &iTarget
+		&& aPos <= iPos + iLength
+		&& iPos <= aPos + aLength? ETrue : EFalse;
+	}
+
+void CEditorCommandDeleteCharFormat::Add(TInt aPos, TInt aLength)
+	{
+	TInt min = aPos < iPos? aPos : iPos;
+	TInt max = iPos + iLength;
+	TInt max2= aPos + aLength;
+	iPos = min;
+	iLength = (max < max2? max2 : max) - min;
+	}
+
+/////////////////////////////////////
+//								   //
+//	CEditorCommandDeleteParFormat  //
+//								   //
+/////////////////////////////////////
+
+CEditorCommandDeleteParFormat::~CEditorCommandDeleteParFormat() {}
+
+CEditorCommandDeleteParFormat* CEditorCommandDeleteParFormat::NewL(
+	const TRepositories& aReps, TInt aPos, TInt aLength, MUnifiedEditor& aTarget)
+	{
+	CEditorCommandDeleteParFormat* r =
+		new(ELeave) CEditorCommandDeleteParFormat(aReps, aTarget);
+	r->iPos = aPos;
+	r->iLength = aLength;
+	return r;
+	}
+
+CCommand* CEditorCommandDeleteParFormat::CreateInverseL() const
+	{
+	return CEditorCommandSetParFormat::NewBatchL(iRepositories, iPos, iLength, iTarget);
+	}
+
+TInt CEditorCommandDeleteParFormat::ExecuteL() const
+	{
+	iTarget.DeleteParFormatL(iPos, iLength);
+	return KErrNone;
+	}
+
+TBool CEditorCommandDeleteParFormat::CanAdd(TInt aPos, TInt aLength, MUnifiedEditor& aTarget) const
+	{
+	return &aTarget == &iTarget
+		&& aPos <= iPos + iLength
+		&& iPos <= aPos + aLength? ETrue : EFalse;
+	}
+
+void CEditorCommandDeleteParFormat::Add(TInt aPos, TInt aLength)
+	{
+	TInt min = aPos < iPos? aPos : iPos;
+	TInt max = iPos + iLength;
+	TInt max2= aPos + aLength;
+	iPos = min;
+	iLength = (max < max2? max2 : max) - min;
+	}
+
+//////////////////////////
+//						//
+//	Command prototypes  //
+//						//
+//////////////////////////
+
+//
+// Attribute setters
+//
+void CEditorCommandCreateStyleProto::Set(const RTmStyle& aStyle)
+	{
+	iStyle = &aStyle;
+	}
+
+void CEditorCommandChangeStyleProto::Set(const RTmStyle& aStyle)
+	{
+	iStyle = &aStyle;
+	}
+
+void CEditorCommandSetStyleProto::Set(TInt aPos,
+	TInt aLength,
+	const TDesC& aName)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+	iName	= &aName;
+	}
+
+void CEditorCommandDeleteStyleProto::Set(const TDesC& aName)
+	{
+	iName	= &aName;
+	}
+
+void CEditorCommandSetCharFormatProto::Set(TInt aPos,
+	TInt aLength,
+	const TTmCharFormatLayer& aFormat)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+	iFormat	= &aFormat;
+	}
+
+void CEditorCommandSetParFormatProto::Set(TInt aPos,
+	TInt aLength,
+	const RTmParFormatLayer& aFormat)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+	iFormat	= &aFormat;
+	}
+
+void CEditorCommandInsertProto::Set(TInt aPos,
+	const TDesC& aText,
+	const TDesC* aStyle,
+	const TTmCharFormatLayer* aCharFormat,
+	const RTmParFormatLayer* aParFormat)
+	{
+	iPos		= aPos;
+	iText		= &aText;
+	iStyle		= aStyle;
+	iCharFormat	= aCharFormat;
+	iParFormat	= aParFormat;
+	}
+
+void CEditorCommandDeleteProto::Set(TInt aPos, TInt aLength)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+
+	// adjust 'iPos' and 'iLength' to be surrogate aligned, if possible
+	if (iPos >= 0 && iPos <= iTarget.DocumentLength())
+		{
+		// check the character at aPos
+		TBuf<2> dest;
+		iTarget.GetText(iPos, dest);
+		if (dest.Length() > 0 && IsLowSurrogate(dest[0]))
+			{
+			// try to decrease aPos by 1
+			if (iPos > 0)
+				{
+				iTarget.GetText(iPos-1, dest);
+				if (dest.Length() > 0 && IsHighSurrogate(dest[0]))
+					{
+					iPos--;
+					iLength++;
+					}
+				else
+					{
+					// do nothing, just delete the corrupt surrogate
+					}
+				}
+			else
+				{
+				// do nothing
+				}
+			}
+		}
+	
+	if (iLength > 0)
+		{
+		// check the character at aPos+aLength
+		TBuf<2> dest;
+		iTarget.GetText(iPos+iLength-1, dest);
+		if (dest.Length() > 0 && IsHighSurrogate(dest[0]))
+			{
+			if (iPos + (iLength - 1) <= iTarget.DocumentLength())
+				{
+				// try to increase aLength by 1
+				iTarget.GetText(iPos+iLength, dest);
+				if (dest.Length() > 0 && IsLowSurrogate(dest[0]))
+					{
+					iLength++;
+					}
+				else
+					{
+					// do nothing
+					}
+				}
+			else
+				{
+				// do nothing
+				}
+			}
+		}
+ 	}
+
+void CEditorCommandDeleteCharFormatProto::Set(TInt aPos, TInt aLength)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+	}
+
+void CEditorCommandDeleteParFormatProto::Set(TInt aPos, TInt aLength)
+	{
+	iPos	= aPos;
+	iLength	= aLength;
+	}
+
+void CEditorCommandDeletePictureProto::Set(TInt aPos)
+	{
+	iPos = aPos;
+	}
+
+void CEditorCommandDestroyPictureProto::Set(TInt aPos)
+	{
+	if (iPictureOwnerDelegate)
+		{
+		iPictureOwnerDelegate->ForgetOwner(this);
+		iPictureOwnerDelegate = 0;
+		}
+	iPos = aPos;
+	}
+
+void CEditorCommandInsertPictureProto::Set(TInt aPos, const TPictureHeader& aPicture)
+	{
+	iPos		= aPos;
+	iPicture	= &aPicture;
+	}
+
+void CEditorCommandRenameStyleProto::Set(const TDesC& aOldName, const TDesC& aNewName)
+	{
+	iOldName	= &aOldName;
+	iNewName	= &aNewName;
+	}
+
+void CEditorCommandSetBaseFormatProto::Set(
+	const TTmCharFormat* aCharFormat, const RTmParFormat* aParFormat)
+	{
+	iChar	= aCharFormat;
+	iPar	= aParFormat;
+	}
+
+void CEditorCommandPasteProto::Set(const CStreamStore& aStore,
+	const CStreamDictionary& aStreamDictionary,	TInt aPos)
+	{
+	iImpl.Set(aStore, aStreamDictionary, aPos);
+	}
+
+//
+// execution and inversion
+//
+
+// CEditorCommandCreateStyleProto
+TInt CEditorCommandCreateStyleProto::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->CreateStyleL(*iStyle);
+	}
+
+CCommand* CEditorCommandCreateStyleProto::CreateInverseL() const
+	{
+	return CEditorCommandDeleteStyle::NewL(Repositories(), iStyle->iName, iTarget);
+	}
+
+
+// CEditorCommandChangeStyleProto
+TInt CEditorCommandChangeStyleProto::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->ChangeStyleL(*iStyle);
+	}
+
+CCommand* CEditorCommandChangeStyleProto::CreateInverseL() const
+	{
+	return CEditorCommandAlterStyle::NewL(Repositories(), iStyle->iName, iTarget);
+	}
+
+// CEditorCommandSetStyleProto
+TInt CEditorCommandSetStyleProto::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->SetStyleL(iPos, iLength, *iName);
+	}
+
+CCommand* CEditorCommandSetStyleProto::CreateInverseL() const
+	{
+	return CEditorCommandSetStyle::NewL(Repositories(), iPos, iLength, iTarget);
+	}
+
+// CEditorCommandDeleteStyleProto
+TInt CEditorCommandDeleteStyleProto::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->DeleteStyleL(*iName);
+	}
+
+CCommand* CEditorCommandDeleteStyleProto::CreateInverseL() const
+	{
+	return CEditorCommandCreateStyle::NewBatchL(Repositories(), *iName, iTarget);
+	}
+
+// CEditorCommandSetCharFormatProto
+TInt CEditorCommandSetCharFormatProto::ExecuteL() const
+	{
+	iTarget.SetCharFormatL(iPos, iLength, *iFormat);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandSetCharFormatProto::CreateInverseL() const
+	{
+	// inverse is to remove formatting and re-apply the old
+	CCommand* inverse =
+		CEditorCommandSetCharFormat::NewBatchL(Repositories(),
+			iPos, iLength, iTarget);
+	CleanupStack::PushL(inverse);
+	// coverity[double_free]
+	inverse = CoalesceL(inverse,
+		CEditorCommandDeleteCharFormat::NewL(Repositories(), iPos, iLength, iTarget));
+	CleanupStack::Pop();
+	return inverse;
+	}
+
+// CEditorCommandSetParFormatProto
+TInt CEditorCommandSetParFormatProto::ExecuteL() const
+	{
+	iTarget.SetParFormatL(iPos, iLength, *iFormat);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandSetParFormatProto::CreateInverseL() const
+	{
+	// inverse is to remove formatting and re-apply the old
+	CCommand* inverse =
+		CEditorCommandSetParFormat::NewBatchL(Repositories(), iPos, iLength, iTarget);
+	CleanupStack::PushL(inverse);
+	// coverity[double_free]
+	inverse = CoalesceL(inverse,
+		CEditorCommandDeleteParFormat::NewL(Repositories(), iPos, iLength, iTarget));
+	CleanupStack::Pop();
+	return inverse;
+	}
+
+// CEditorCommandInsertProto
+TInt CEditorCommandInsertProto::ExecuteL() const
+	{
+	iTarget.InsertTextL(iPos, *iText, iStyle, iCharFormat, iParFormat);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandInsertProto::CreateInverseL() const
+	{
+	return CEditorCommandDeleteText::NewL(Repositories(), iPos, iText->Length(), iTarget);
+	}
+
+TBool CEditorCommandInsertProto::PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const
+	{
+	if (aLastCommand.FamilyUid() != TUid::Uid(KUndoDllUid))
+		return EFalse;
+	CEditorCommandDeleteText* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteText();
+	if (!last)
+		return EFalse;
+	return last->CanAdd(iPos, iText->Length(), iTarget);
+	}
+
+void CEditorCommandInsertProto::AddInverseToLast(CSingleCommand& aLastCommand) const
+	{
+	ASSERT(aLastCommand.FamilyUid() == TUid::Uid(KUndoDllUid));
+	CEditorCommandDeleteText* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandDeleteText();
+	ASSERT(last);
+	last->Add(iText->Length());
+	}
+
+// CEditorCommandDeleteProto
+TInt CEditorCommandDeleteProto::ExecuteL() const
+	{
+	iTarget.DeleteTextL(iPos, iLength);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandDeleteProto::CreateInverseL() const
+	{
+	return CEditorCommandInsertTextAndFormat::NewBatchL(Repositories(),
+		iPos, iLength, iTarget);
+	}
+
+TBool CEditorCommandDeleteProto::PrepareToAddInverseToLastL(CSingleCommand& aLastCommand) const
+	{
+	if (iDeletedText.MaxLength() < iLength)
+		return EFalse;
+	if (aLastCommand.FamilyUid() != TUid::Uid(KUndoDllUid))
+		return EFalse;
+	CEditorCommandInsertTextAndFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandInsertTextAndFormat();
+	if (!last)
+		return EFalse;
+	CEditorCommandInsertTextAndFormat::RTextAndFormatParameters params;
+	CleanupClosePushL(params);
+	params.SetL(iPos, iLength, iTarget);
+	TBool result = EFalse;
+	if (params.iText.Length() == iLength)
+		{
+		result = last->CanAdd(params, iTarget);
+		if (result)
+			iDeletedText = params.iText;
+		}
+	CleanupStack::PopAndDestroy();
+	return result;
+	}
+
+void CEditorCommandDeleteProto::AddInverseToLast(CSingleCommand& aLastCommand) const
+	{
+	ASSERT(aLastCommand.FamilyUid() == TUid::Uid(KUndoDllUid));
+	CEditorCommandInsertTextAndFormat* last =
+		static_cast<CEditorCommand&>(aLastCommand).CastToCEditorCommandInsertTextAndFormat();
+	ASSERT(last);
+	last->Add(iPos, iDeletedText);
+	}
+
+// CEditorCommandDeleteCharFormatProto
+TInt CEditorCommandDeleteCharFormatProto::ExecuteL() const
+	{
+	iTarget.DeleteCharFormatL(iPos, iLength);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandDeleteCharFormatProto::CreateInverseL() const
+	{
+	return CEditorCommandSetCharFormat::NewBatchL(Repositories(),
+		iPos, iLength, iTarget);
+	}
+
+// CEditorCommandDeleteParFormatProto
+TInt CEditorCommandDeleteParFormatProto::ExecuteL() const
+	{
+	iTarget.DeleteParFormatL(iPos, iLength);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandDeleteParFormatProto::CreateInverseL() const
+	{
+	return CEditorCommandSetParFormat::NewBatchL(Repositories(),
+		iPos, iLength, iTarget);
+	}
+
+// CEditorCommandDeletePictureProto
+TInt CEditorCommandDeletePictureProto::ExecuteL() const
+	{
+	MUnifiedEditor::MPictureSupport* pi = iTarget.PictureSupport();
+	ASSERT(pi);
+	pi->DropPictureL(iPos);
+	return KErrNone;
+	}
+
+// CEditorCommandInsertPictureProto
+TInt CEditorCommandInsertPictureProto::ExecuteL() const
+	{
+	MUnifiedEditor::MPictureSupport* pi = iTarget.PictureSupport();
+	ASSERT(pi);
+	pi->InsertPictureL(iPos, *iPicture);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandInsertPictureProto::CreateInverseL() const
+	{
+	return CEditorCommandDeletePicture::NewL(Repositories(), iPos, iTarget);
+	}
+
+// CEditorCommandDestroyPictureProto
+void CEditorCommandDestroyPictureProto::ForgetDelegate()
+	{
+	iPictureOwnerDelegate = 0;
+	}
+
+CEditorCommandDestroyPictureProto::~CEditorCommandDestroyPictureProto()
+	{
+	if (iPictureOwnerDelegate)
+		iPictureOwnerDelegate->ForgetOwner(this);
+	}
+
+CCommand* CEditorCommandDestroyPictureProto::CreateInverseL() const
+	{
+	CEditorCommandDestroyPictureProto* nonConstThis =
+		const_cast<CEditorCommandDestroyPictureProto*>(this);
+	if (iPictureOwnerDelegate)
+		{
+		iPictureOwnerDelegate->ForgetOwner(nonConstThis);
+		iPictureOwnerDelegate = 0;
+		}
+	CCommand* style =
+		CEditorCommandSetStyle::NewL(Repositories(), iPos, 1, iTarget);
+	CleanupStack::PushL(style);
+	CCommand* charFormat =
+		CEditorCommandSetCharFormat::NewBatchL(Repositories(), iPos, 1, iTarget);
+	CleanupStack::PushL(charFormat);
+	CCommand* parFormat =
+		CEditorCommandSetParFormat::NewBatchL(Repositories(), iPos, 1, iTarget);
+	CleanupStack::PushL(parFormat);
+	iPictureOwnerDelegate =
+		CEditorCommandInsertPicture::NewL(Repositories(), iPos,
+		*const_cast<CEditorCommandDestroyPictureProto*>(nonConstThis), iTarget);
+	// coverity[double_free]
+	CCommand* command = CoalesceL(parFormat, iPictureOwnerDelegate);
+	CleanupStack::Pop();	// parFormat, no longer owned
+	// coverity[double_free]
+	command = CoalesceL(charFormat, command);
+	CleanupStack::Pop();	// charFormat, no longer owned
+	// coverity[double_free]
+	command = CoalesceL(style, command);
+	CleanupStack::Pop();	// style, no longer owned
+
+	return command;
+	}
+
+TInt CEditorCommandDestroyPictureProto::ExecuteL() const
+	{
+	MUnifiedEditor::MPictureSupport* pi = iTarget.PictureSupport();
+	ASSERT(pi);
+	TPictureHeader pic;
+	pi->Picture(iPos, pic);
+	pi->DropPictureL(iPos);
+	if (iPictureOwnerDelegate)
+		{
+		iPictureOwnerDelegate->TakePictureOwnership(pic);
+		iPictureOwnerDelegate = 0;
+		}
+	else
+		pic.DeletePicture();
+	return KErrNone;
+	}
+
+// CEditorCommandRenameStyleProto
+TInt CEditorCommandRenameStyleProto::ExecuteL() const
+	{
+	MUnifiedEditor::MStyleSupport* si = iTarget.StyleSupport();
+	ASSERT(si);
+	return si->RenameStyleL(*iOldName, *iNewName);
+	}
+
+CCommand* CEditorCommandRenameStyleProto::CreateInverseL() const
+	{
+	return CEditorCommandRenameStyle::NewL(Repositories(),
+		*iNewName, *iOldName, iTarget);
+	}
+
+// CEditorCommandPasteProto
+TInt CEditorCommandPasteProto::ExecuteL() const
+	{
+	return iImpl.ExecuteL();
+	}
+
+UndoSystem::CCommand* CEditorCommandPasteProto::CreateInverseL() const
+	{
+	RStoreReadStream stream;
+	iImpl.OpenPlainTextStreamLC(stream);
+	TInt pos = iImpl.Pos();
+	TInt length = stream.ReadInt32L();
+	CCommand* command = 0;
+	CBufSeg* buf = CBufSeg::NewL(200);
+	CleanupStack::PushL(buf);
+	TPtrC current;
+
+	if (length < 0)
+		User::Leave(KErrNotSupported);	// don't know how to undo
+
+	RBufWriteStream bufferStream;
+	bufferStream.Open(*buf);
+	TMemoryStreamUnicodeSink sink(bufferStream);
+	TUnicodeExpander e;
+	e.ExpandL(sink, stream, length);
+	bufferStream.CommitL();
+	bufferStream.Close();
+
+	TInt end = pos + length;
+	TInt bufferPos = 0;
+
+	while (pos != end)
+		{
+		ASSERT(pos < end);
+		TInt lengthSearched = 0;
+		TInt pic = KErrNotFound;
+		while ((pic = current.Locate(CEditableText::EPictureCharacter)) < 0
+			&& pos + lengthSearched < end)
+			{
+			lengthSearched += current.Length();
+			TPtr8 seg(buf->Ptr(bufferPos));
+			bufferPos += seg.Length();
+			current.Set(reinterpret_cast<const TText*>(seg.Ptr()),
+				seg.Length() / sizeof(TText));
+			}
+		TInt currentSearched = 0 <= pic? pic : current.Length();
+		lengthSearched += currentSearched;
+
+		if (lengthSearched)
+			{
+			// we have some text to delete
+			CleanupStack::PushL(command);
+			// coverity[double_free]
+			command = CoalesceL(command,
+				CEditorCommandDeleteText::NewL(Repositories(), pos, lengthSearched,
+					iImpl.Target()));
+			CleanupStack::Pop();
+			pos += lengthSearched;
+			}
+
+		if (0 <= pic)
+			{
+			ASSERT(current.Length());
+			// we have a picture to delete
+			CleanupStack::PushL(command);
+			command = CoalesceL(command,
+				CEditorCommandDeletePicture::NewL(Repositories(), pos, iImpl.Target()));
+			CleanupStack::Pop();
+			currentSearched += 1;
+			pos += 1;
+			}
+
+		current.Set(current.Mid(currentSearched));
+		}
+
+	CleanupStack::PopAndDestroy(buf);
+	CleanupStack::PopAndDestroy();		// close stream
+
+	return command;
+	}
+
+// CEditorCommandSetBaseFormatProto
+TInt CEditorCommandSetBaseFormatProto::ExecuteL() const
+	{
+	iTarget.SetBaseFormatL(*iChar, *iPar);
+	return KErrNone;
+	}
+
+CCommand* CEditorCommandSetBaseFormatProto::CreateInverseL() const
+	{
+	return CEditorCommandSetBaseFormat::NewL(Repositories(),
+		iTarget);
+	}
+
+//////////////////////
+//					//
+//	free functions  //
+//					//
+//////////////////////
+
+TInt UndoSystem::FindPicture(const MUnifiedEditor& aTarget, TInt aPos, TInt aLength)
+	{
+	const MUnifiedEditor::MPictureSupport* pi =
+		const_cast<MUnifiedEditor&>(aTarget).PictureSupport();
+	if (!pi)
+		return KErrNotFound;
+	while (0 < aLength)
+		{
+		TPtrC text;
+		aTarget.GetText(aPos, text);
+		if (aLength < text.Length())
+			text.Set(text.Ptr(), aLength);
+		TInt result;
+		while (0 <= (result = text.Locate(CEditableText::EPictureCharacter)))
+			{
+			TPictureHeader pic;
+			pi->Picture(aPos + result, pic);
+			if (pic.iPictureType != KNullUid)
+				return aPos + result;
+			++result;
+			aPos += result;
+			aLength -= result;
+			TPtrC temp = text.Mid(result);
+			text.Set(temp);
+			}
+		aPos += text.Length();
+		aLength -= text.Length();
+		}
+	return KErrNotFound;
+	}
+