textacts.cpp

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// $Id: textacts.cpp 751 2006-03-31 15:43:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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-----------------

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=================================XARAHEADEREND============================
 */
// Actions used by text operations

/*
*/

#include "camtypes.h"
#include "textacts.h"

// Code headers
#include "nodetext.h"
#include "ndtxtpth.h"

// Resource headers


DECLARE_SOURCE("$Revision: 751 $");

CC_IMPLEMENT_DYNCREATE(BaseTextAction, Action)
CC_IMPLEMENT_DYNCREATE(StoreCharCodeAction, BaseTextAction)
CC_IMPLEMENT_DYNCREATE(StoreKernCodeAction, BaseTextAction)
CC_IMPLEMENT_DYNCREATE(ReversePathAction, BaseTextAction)
CC_IMPLEMENT_DYNCREATE(MatrixRemoveFromPathAction, BaseTextAction)
CC_IMPLEMENT_DYNCREATE(MatrixFitToPathAction, BaseTextAction)

#define new CAM_DEBUG_NEW



/********************************************************************************************
>   BaseTextAction::BaseTextAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
BaseTextAction::BaseTextAction()
{
    pStory = NULL;
}



// StoreCharCodeAction

/********************************************************************************************
>   StoreCharCodeAction::StoreCharCodeAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
StoreCharCodeAction::StoreCharCodeAction()
{
    pChar = NULL;
    CharCode = 0;
}


/********************************************************************************************
>   StoreCharCodeAction::~StoreCharCodeAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Destructor
********************************************************************************************/
StoreCharCodeAction::~StoreCharCodeAction()
{
}


/********************************************************************************************
>   virtual ActionCode StoreCharCodeAction::Execute()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Called during undo/redo to restore a character code to a particular character
                Inserts StoreCharCodeAction to restore the current character code then
                sets it to the value in the action
********************************************************************************************/
ActionCode StoreCharCodeAction::Execute()
{
    // Check the member variables
    ERROR2IF(pStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pChar == NULL, AC_FAIL, "TextChar pointer is NULL");

    // Insert an action to restore the character code to its current value on redo
    ActionCode ActCode;
    ActCode = StoreCharCodeAction::Init(pOperation, pOppositeActLst, pStory, pChar);

    // Now set the character code the old value
    if (ActCode != AC_FAIL)
        pChar->SetUnicodeValue(CharCode);

    return ActCode;
}


/********************************************************************************************
>   static ActionCode StoreCharCodeAction::Init(Operation* pOp,
                                                ActionList* pActionList,
                                                TextStory* pTextStory,
                                                TextChar* pTextChar)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the story containing pChar
                pTextChar - points to the character to store the character code of
    Outputs:    Constructs a StoreCharCodeAction, initialises it and inserts in into the action list
    Returns:    An action code depending on the success of this function
    Purpose:    Called to constuct a StoreCharCodeAction, set it up and and insert it into
                an operations action list
    Errors:     Checks the parameters
********************************************************************************************/
ActionCode StoreCharCodeAction::Init(Operation* pOp, ActionList* pActionList, TextStory* pTextStory, TextChar* pTextChar)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pTextChar == NULL, AC_FAIL, "TextChar pointer is NULL");

    // Create a new action and insert it in the action list
    UINT32 ActSize = sizeof(StoreCharCodeAction);
    StoreCharCodeAction* pNewAction = NULL;
    ActionCode Ac = Action::Init( pOp, pActionList, ActSize, CC_RUNTIME_CLASS(StoreCharCodeAction), (Action**)&pNewAction);

    // Set the members of the new action
    if ((Ac == AC_OK) && (pNewAction != NULL))
    {
        pNewAction->pStory = pTextStory;
        pNewAction->pChar = pTextChar;
        pNewAction->CharCode = pTextChar->GetUnicodeValue();
    }

    return Ac;
}


/********************************************************************************************
>   static BOOL StoreCharCodeAction::DoStoreCharacterCode(Operation* pOp,
                                                          ActionList* pActionList,
                                                          TextChar* pTextChar)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextChar - points to the character to store the character code of
    Outputs:    Adds an action to the operations action list
    Returns:    TRUE/FALSE for success/failure
    Purpose:    Before changing a characters UniCode value in your op, call this function to
                store the characters current value so it is restored on undo
    Errors:     Checks on parameters and structure of TextStory
********************************************************************************************/
BOOL StoreCharCodeAction::DoStoreCharacterCode( Operation* pOp, ActionList* pActionList, TextChar* pTextChar)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextChar == NULL, AC_FAIL, "TextChar pointer is NULL");

    // Get a pointer to the characters parent TextStory
    TextStory* pParentStory = (TextStory*)pTextChar->FindParent(CC_RUNTIME_CLASS(TextStory));
    ERROR2IF(pParentStory == NULL, AC_FAIL, "TextChar has no parent TextStory");

    // Insert the action
    ActionCode Ac;
    Ac = Init(pOp, pActionList, pParentStory, pTextChar);

    return (Ac != AC_FAIL);
}



// StoreKernCodeAction

/********************************************************************************************
>   StoreKernCodeAction::StoreKernCodeAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
StoreKernCodeAction::StoreKernCodeAction()
{
    pKernCode = NULL;
    KernValue = DocCoord(0,0);
}


/********************************************************************************************
>   StoreKernCodeAction::~StoreKernCodeAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Destructor
********************************************************************************************/
StoreKernCodeAction::~StoreKernCodeAction()
{
}


/********************************************************************************************
>   virtual ActionCode StoreKernCodeAction::Execute()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Purpose:    Called during undo/redo to restore a kern code value
                Inserts a StoreKernCodeAction to restore the current kern value then
                sets it to the value in the action
********************************************************************************************/
ActionCode StoreKernCodeAction::Execute()
{
    // Check the member variables
    ERROR2IF(pStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pKernCode == NULL, AC_FAIL, "TextChar pointer is NULL");

    // Insert an action to restore the kern code to its current value on redo
    ActionCode ActCode;
    ActCode = StoreKernCodeAction::Init(pOperation, pOppositeActLst, pStory, pKernCode);

    // Now set the kern code the old value
    if (ActCode != AC_FAIL)
        pKernCode->SetValue(KernValue);

    return ActCode;
}


/********************************************************************************************
>   static ActionCode StoreKernCodeAction::Init(Operation* pOp,
                                                ActionList* pActionList,
                                                TextStory* pTextStory,
                                                KernCode* pKern)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the story containing pChar
                pKernCode - points to the kern code to store the value of
    Outputs:    Constructs a StoreKernCodeAction, initialises it and inserts in into the action list
    Returns:    An action code depending on the success of this function
    Purpose:    Called to constuct a StoreKernCodeAction, set it up and and insert it into
                an operations action list
    Errors:     Checks the parameters
********************************************************************************************/
ActionCode StoreKernCodeAction::Init(Operation* pOp, ActionList* pActionList, TextStory* pTextStory, KernCode* pKern)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pKern == NULL, AC_FAIL, "KernCode pointer is NULL");

    // Create a new action and insert it in the action list
    UINT32 ActSize = sizeof(StoreKernCodeAction);
    StoreKernCodeAction* pNewAction = NULL;
    ActionCode Ac = Action::Init( pOp, pActionList, ActSize, CC_RUNTIME_CLASS(StoreKernCodeAction), (Action**)&pNewAction);

    // Set the members of the new action
    if ((Ac == AC_OK) && (pNewAction != NULL))
    {
        pNewAction->pStory = pTextStory;
        pNewAction->pKernCode = pKern;
        pNewAction->KernValue = pKern->GetValue();
    }

    return Ac;
}


/********************************************************************************************
>   static BOOL StoreKernCodeAction::DoStoreKernValue(Operation* pOp,
                                                      ActionList* pActionList,
                                                      KernCode* pKern)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pKern - points to the kern code to store the value of
    Outputs:    Adds an action to the operations action list
    Returns:    TRUE/FALSE for success/failure
    Purpose:    Before changing a kern code value in your op, call this function to store the
                current value so it is restored on undo
    Errors:     Checks on parameters and structure of TextStory
********************************************************************************************/
BOOL StoreKernCodeAction::DoStoreKernValue( Operation* pOp, ActionList* pActionList, KernCode* pKern)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pKern == NULL, AC_FAIL, "TextChar pointer is NULL");

    // Get a pointer to the characters parent TextStory
    TextStory* pParentStory = (TextStory*)pKern->FindParent(CC_RUNTIME_CLASS(TextStory));
    ERROR2IF(pParentStory == NULL, AC_FAIL, "TextChar has no parent TextStory");

    // Insert the action
    ActionCode Ac;
    Ac = Init(pOp, pActionList, pParentStory, pKern);

    return (Ac != AC_FAIL);
}



// ReversePathAction

/********************************************************************************************
>   ReversePathAction::ReversePathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
ReversePathAction::ReversePathAction()
{
}


/********************************************************************************************
>   ReversePathAction::~ReversePathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/5/95
    Purpose:    Destructor
********************************************************************************************/
ReversePathAction::~ReversePathAction()
{
}


/********************************************************************************************
>   virtual ActionCode ReversePathAction::Execute()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/5/95
    Purpose:    Called during undo/redo to reverse the path inside a TextStory
                Inserts a similar action into the opposite action list then reverses the path
********************************************************************************************/
ActionCode ReversePathAction::Execute()
{
    // Check the member variables
    ERROR2IF(pStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pOperation == NULL, AC_FAIL, "The operation pointer is NULL(!)");

    // Insert an action to reverse the path again on redo
    ActionCode ActCode;
    ActCode = ReversePathAction::Init(pOperation, pOppositeActLst, pStory);

    // Now reverse the path
    if (ActCode != AC_FAIL)
        pStory->ReverseTextOnPath();

    return ActCode;
}


/********************************************************************************************
>   static ActionCode ReversePathAction::Init(Operation* pOp,
                                                ActionList* pActionList,
                                                TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the story containing pChar
    Outputs:    Constructs a ReversePathAction, initialises it and inserts in into the action list
    Returns:    An action code depending on the success of this function
    Purpose:    Called to constuct a ReversePathAction, set it up and and insert it into
                an operations action list
    Errors:     Checks the parameters
********************************************************************************************/
ActionCode ReversePathAction::Init(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, AC_FAIL, "The TextStory pointer is NULL");

    // Create a new action and insert it in the action list
    UINT32 ActSize = sizeof(ReversePathAction);
    ReversePathAction* pNewAction = NULL;
    ActionCode Ac = Action::Init( pOp, pActionList, ActSize, CC_RUNTIME_CLASS(ReversePathAction), (Action**)&pNewAction);

    // Set the members of the new action
    if ((Ac == AC_OK) && (pNewAction != NULL))
        pNewAction->pStory = pTextStory;

    return Ac;
}


/********************************************************************************************
>   static BOOL ReversePathAction::DoReversePath(Operation* pOp,
                                                 ActionList* pActionList,
                                                 TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the TextStory to reverse the path in
    Outputs:    Adds an action to the operations action list
    Returns:    TRUE/FALSE for success/failure
    Purpose:    Call this function to reverse the "Text on a path" path in a your op.  It
                inserts an action to undo the change, then reverses the path for you
    Errors:     Checks on parameters and structure of TextStory
********************************************************************************************/
BOOL ReversePathAction::DoReversePath(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, FALSE, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, FALSE, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, FALSE, "The TextStory pointer is NULL");
    ERROR3IF(pTextStory->GetTextPath() == NULL, "TextStory was not on a path");

    // Insert an action to restore the path on undo (just reverse it back)
    ActionCode ActCode;
    ActCode = ReversePathAction::Init(pOp, pActionList, pTextStory);

    // Now reverse the path
    if (ActCode != AC_FAIL)
        pTextStory->ReverseTextOnPath();

    return (ActCode != AC_FAIL);
}



// MatrixFitToPathAction

/********************************************************************************************
>   MatrixFitToPathAction::MatrixFitToPathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
MatrixFitToPathAction::MatrixFitToPathAction()
{
}


/********************************************************************************************
>   MatrixFitToPathAction::~MatrixFitToPathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Destructor
********************************************************************************************/
MatrixFitToPathAction::~MatrixFitToPathAction()
{
}


/********************************************************************************************
>   virtual ActionCode MatrixFitToPathAction::Execute()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Called during undo/redo to restore the TextStory matrices
                Inserts an opposite action into the opposite action list then changes the
                matrices
********************************************************************************************/
ActionCode MatrixFitToPathAction::Execute()
{
    // Check the member variables
    ERROR2IF(pStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pOperation == NULL, AC_FAIL, "The operation pointer is NULL(!)");

    // Insert an action to reverse the path again on redo
    ActionCode ActCode;
    ActCode = MatrixRemoveFromPathAction::Init(pOperation, pOppositeActLst, pStory);

    // Now set the matrices
    if (ActCode != AC_FAIL)
        pStory->MatrixFitToPath();

    return ActCode;
}


/********************************************************************************************
>   static ActionCode MatrixFitToPathAction::Init(Operation* pOp,
                                                ActionList* pActionList,
                                                TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the story containing pChar
    Outputs:    Constructs a MatrixFitToPathAction, initialises it and inserts in into the action list
    Returns:    An action code depending on the success of this function
    Purpose:    Called to constuct a MatrixFitToPathAction, set it up and and insert it into
                an operations action list
    Errors:     Checks the parameters
********************************************************************************************/
ActionCode MatrixFitToPathAction::Init(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, AC_FAIL, "The TextStory pointer is NULL");

    // Create a new action and insert it in the action list
    UINT32 ActSize = sizeof(MatrixFitToPathAction);
    MatrixFitToPathAction* pNewAction = NULL;
    ActionCode Ac = Action::Init( pOp, pActionList, ActSize, CC_RUNTIME_CLASS(MatrixFitToPathAction), (Action**)&pNewAction);

    // Set the members of the new action
    if ((Ac == AC_OK) && (pNewAction != NULL))
        pNewAction->pStory = pTextStory;

    return Ac;
}


/********************************************************************************************
>   static BOOL MatrixFitToPathAction::DoMatrixRemoveFromPath(Operation* pOp,
                                                              ActionList* pActionList,
                                                              TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the TextStory to reverse the path in
    Outputs:    Adds an action to the operations action list
    Returns:    TRUE/FALSE for success/failure
    Purpose:    Call this function when removing text from a path.  It sets the story matrix
                to the character matrix and sets the character matrix to unity.  It also
                inserts an action to reverse these changes.
    Errors:     Checks on parameters and structure of TextStory
********************************************************************************************/
BOOL MatrixFitToPathAction::DoMatrixRemoveFromPath(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, FALSE, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, FALSE, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, FALSE, "The TextStory pointer is NULL");

    // Insert an action to restore matrices on undo 
    ActionCode ActCode;
    ActCode = MatrixFitToPathAction::Init(pOp, pActionList, pTextStory);

    // Now set the matrices
    if (ActCode != AC_FAIL)
        pTextStory->MatrixRemoveFromPath();

    return (ActCode != AC_FAIL);
}



// MatrixRemoveFromPathAction

/********************************************************************************************
>   MatrixRemoveFromPathAction::MatrixRemoveFromPathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Constructor - initialises the member variables
********************************************************************************************/
MatrixRemoveFromPathAction::MatrixRemoveFromPathAction()
{
}


/********************************************************************************************
>   MatrixRemoveFromPathAction::~MatrixRemoveFromPathAction()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Destructor
********************************************************************************************/
MatrixRemoveFromPathAction::~MatrixRemoveFromPathAction()
{
}


/********************************************************************************************
>   virtual ActionCode MatrixRemoveFromPathAction::Execute()

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Purpose:    Called during undo/redo to restore the TextStory matrices
                Inserts an opposite action into the opposite action list then changes the
                matrices
********************************************************************************************/
ActionCode MatrixRemoveFromPathAction::Execute()
{
    // Check the member variables
    ERROR2IF(pStory == NULL, AC_FAIL, "The TextStory pointer is NULL");
    ERROR2IF(pOperation == NULL, AC_FAIL, "The operation pointer is NULL(!)");

    // Insert an action to reverse the path again on redo
    ActionCode ActCode;
    ActCode = MatrixFitToPathAction::Init(pOperation, pOppositeActLst, pStory);

    // Now set the matrices
    if (ActCode != AC_FAIL)
        pStory->MatrixRemoveFromPath();

    return ActCode;
}


/********************************************************************************************
>   static ActionCode MatrixRemoveFromPathAction::Init(Operation* pOp,
                                                ActionList* pActionList,
                                                TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the story containing pChar
    Outputs:    Constructs a MatrixRemoveFromPathAction, initialises it and inserts in into
                the action list
    Returns:    An action code depending on the success of this function
    Purpose:    Called to constuct a MatrixRemoveFromPathAction, set it up and and insert it
                into an operations action list
    Errors:     Checks the parameters
********************************************************************************************/
ActionCode MatrixRemoveFromPathAction::Init(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, AC_FAIL, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, AC_FAIL, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, AC_FAIL, "The TextStory pointer is NULL");

    // Create a new action and insert it in the action list
    UINT32 ActSize = sizeof(MatrixRemoveFromPathAction);
    MatrixRemoveFromPathAction* pNewAction = NULL;
    ActionCode Ac = Action::Init( pOp, pActionList, ActSize, CC_RUNTIME_CLASS(MatrixRemoveFromPathAction), (Action**)&pNewAction);

    // Set the members of the new action
    if ((Ac == AC_OK) && (pNewAction != NULL))
        pNewAction->pStory = pTextStory;

    return Ac;
}


/********************************************************************************************
>   static BOOL MatrixRemoveFromPathAction::DoMatrixFitToPath(Operation* pOp,
                                                              ActionList* pActionList,
                                                              TextStory* pTextStory)
    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/5/95
    Inputs:     pOp - points to the operation to add the action to
                pActionList - points to the action list to add the action to
                pTextStory - points to the TextStory to reverse the path in
    Outputs:    Adds an action to the operations action list
    Returns:    TRUE/FALSE for success/failure
    Purpose:    Call this function when fitting text to a path.  It sets the character matrix
                to the story matrix and sets the story matrix to unity.  It also inserts an
                action to reverse these changes.
    Errors:     Checks on parameters and structure of TextStory
********************************************************************************************/
BOOL MatrixRemoveFromPathAction::DoMatrixFitToPath(Operation* pOp, ActionList* pActionList, TextStory* pTextStory)
{
    // Check the parameters
    ERROR2IF(pOp == NULL, FALSE, "The operation pointer is NULL");
    ERROR2IF(pActionList == NULL, FALSE, "The action list pointer is NULL");
    ERROR2IF(pTextStory == NULL, FALSE, "The TextStory pointer is NULL");

    // Insert an action to restore matrices on undo 
    ActionCode ActCode;
    ActCode = MatrixRemoveFromPathAction::Init(pOp, pActionList, pTextStory);

    // Now set the matrices
    if (ActCode != AC_FAIL)
        pTextStory->MatrixFitToPath();

    return (ActCode != AC_FAIL);
}

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