/*

    File:       SVAEMove.c

    Contains:   

    Written by: Original version by Jon Lansdell and Nigel Humphreys.

                3.1 updates by Greg Sutton.

    Copyright:  Copyright © 1995-1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

                7/20/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#include "SVAEMove.h"

#include "SVEditAEUtils.h"

#include "SVEditWindow.h"       // for DPtrFromWindowPtr()

#include "SVAETextUtils.h"

#include "SVAEDelete.h"

#include "SVAECreate.h"

#include "SVAEGetData.h"

#pragma segment AppleEvent

pascal OSErr    DoMove(const AppleEvent *theAppleEvent, AppleEvent *reply, long  handlerRefCon)

{

#pragma unused(handlerRefCon)

    AEDesc      directObj = {typeNull, NULL},

                insertHereDesc = {typeNull, NULL},

                resultDesc = {typeNull, NULL};

    OSErr       err;

    err = AEGetParamDesc(theAppleEvent, keyDirectObject, typeWildCard, &directObj);

    if (noErr != err) goto done;

    err = AEGetParamDesc(theAppleEvent, keyAEInsertHere, typeWildCard, &insertHereDesc);

    if (noErr != err) goto done;

        // missing any parameters?

    err = GotRequiredParams(theAppleEvent);

    if (noErr != err) goto done;

    err = MoveDesc(&directObj, &insertHereDesc, &resultDesc);

    if (noErr != err) goto done;

    err = AddResultToReply(&resultDesc, reply, err);

done:

    if (directObj.dataHandle)

        AEDisposeDesc(&directObj);

    if (insertHereDesc.dataHandle)

        AEDisposeDesc(&insertHereDesc);

    return(err);

}

OSErr   MoveTextToken(TextToken* token, AEDesc* insertHereDesc, AEDesc* result)

{

    TextToken       insertAtToken;

    AEDesc          dataDesc = {typeNull, NULL},

                    insertDesc = {typeNull, NULL},

                    propertyDesc = {typeNull, NULL};    // Use to pass no properties

    DescType        insertType;

    short           numPartial;

    OSErr           err;

                        // Get the data descriptor to insert

    err = GetTextTextProperty(token, &dataDesc);

    if (noErr != err) goto done;

                        // Get the place to insert it

    err = GetInsertDescFromInsertHere(insertHereDesc, &insertDesc, &insertType);

    if (noErr != err) goto done;

    if (typeNull == insertType)     // Default to setting the selection in the front window

        err = errAETypeError;       // GetWindowSelection(FrontWindow(), &insertAtToken, &oldLength);

    else                            // Otherwise get a selection from the insertDesc

        err = GetInsertToken(&insertDesc, insertType, &insertAtToken);

    if (noErr != err) goto done;

                        // Sort out any moving onto self scenarios

                        // and offsets changing due to deletion of where it was

    switch (TokenWithinToken(token, &insertAtToken, &numPartial))

    {

        case kTokenBefore:

                    // Do Nothing

            break;

        case kTokenAfter:

                    // Balance up for delete

            insertAtToken.tokenOffset -= token->tokenLength;

            break;

        case kTokenWithin:

                    //  tell document 1 of application "7Edit"

                    //      move first word to last character of first word

                    //  end tell

            insertAtToken.tokenOffset = token->tokenOffset;

            insertAtToken.tokenLength = 0;

            break;

        case kTokenPartialBefore:

            insertAtToken.tokenLength -= numPartial;

            break;

        case kTokenPartialAfter:

            insertAtToken.tokenOffset = token->tokenOffset;

            insertAtToken.tokenLength -= numPartial;

            break;

    }

                // Delete the text to be moved

    err = DeleteTextToken(token);

    if (noErr != err) goto done;

                // Secondly create the text wherever

    err = CreateAtTextToken(cText, &dataDesc, &insertAtToken, &propertyDesc, result);

    if (noErr != err) goto done;

done:

    if (dataDesc.dataHandle)

        AEDisposeDesc(&dataDesc);

    return(err);

}

OSErr   MoveTextDesc(AEDesc* textDesc, AEDesc* insertHereDesc, AEDesc* result)

{

    TextToken       aTextToken;

    Size            actualSize;

    OSErr           err;

    if (typeMyText != textDesc->descriptorType)

        return(errAETypeError);

    GetRawDataFromDescriptor(textDesc, (Ptr)&aTextToken, sizeof(aTextToken), &actualSize);

    err = MoveTextToken(&aTextToken, insertHereDesc, result);

    return(err);

}

OSErr   MoveDesc(AEDesc* aDesc, AEDesc* insertHereDesc, AEDesc* result)

{

    AEDesc      moveDesc = {typeNull, NULL},

                textDesc = {typeNull, NULL};

    OSErr       err;

    if (typeObjectSpecifier == aDesc->descriptorType)

        err = AEResolve(aDesc, kAEIDoMinimum, &moveDesc);

    else

        err = AEDuplicateDesc(aDesc, &moveDesc);

    if (noErr != err) goto done;

    switch (moveDesc.descriptorType)

    {

        case typeAEList:

            err = errAETypeError;

            // We can't handle moving more than one item because as

            // soon as one item is moved all the rest of the tokens

            // are likely to have their offsets messed up.

            // No doubt it can be done thoughÉ

            break;

        default:

            err = AECoerceDesc(&moveDesc, typeMyText, &textDesc);

            if (noErr != err) goto done;

            err = MoveTextDesc(&textDesc, insertHereDesc, result);

    }

done:

    if (moveDesc.dataHandle)

        AEDisposeDesc(&moveDesc);

    if (textDesc.dataHandle)

        AEDisposeDesc(&textDesc);

    return(err);

}