//

//

//      teutilities.c

//

//      Supplemental TextEdit utilities.

//      

//

//      Author:     Nick Thompson & Pablo Fernicola, with thanks to the QuickDraw 3D team

//      Date:       Monday, February 3, 1992

//

//      Copyright © 1992-95 Apple Computer, Inc., All Rights Reserved

//

//

#include <Script.h>

#include "Tumbler_prototypes.h"

#include "Tumbler_teutilities.h"

//

//  TEICut is an intelligent version of TECut. If the selection is a range

//  of words, TEICut cuts the selection and removes a space from either the

//  beginning or end of the selection point when the result of cutting leaves

//  one too many spaces in a sentence. The resulting change in size of the

//  TextEdit record is returned.

//

//  NOTE: This function does not work properly in all situations. It may still

//      need some work.

//

short TEICut(TEHandle theTE)

{   OffsetTable     startOffsets, endOffsets;

    short           selStart, selEnd, characters;

    Handle          theScrap;

    if (!(characters = (**theTE).selStart - (**theTE).selEnd))

        return(0);

    FindWord(*((**theTE).hText), (**theTE).teLength, (**theTE).selStart, true,

                    0L, startOffsets);

    FindWord(*((**theTE).hText), (**theTE).teLength, (**theTE).selEnd, false,

                    0L, endOffsets);

    if ((startOffsets[0].offFirst == (**theTE).selStart) &&

        (endOffsets[0].offSecond  == (**theTE).selEnd)) {

        //

        //  Both the beginning and end of the current selection is on

        //  word boundaries.

        selStart = (**theTE).selStart;

        selEnd = (**theTE).selEnd;

        if ((*((**theTE).hText))[selStart - 1] == ' ') {

            TESetSelect(selStart - 1, selEnd, theTE);

            TECut(theTE);

            theScrap = TEScrapHandle();

            BlockMove((char *) (*theScrap) + 1, (*theScrap), TEGetScrapLength() - 1);

            TESetScrapLength(TEGetScrapLength() - 1);

            ZeroScrap();

            TEToScrap();

            characters--;

        } else if ((*((**theTE).hText))[selEnd] == ' ') {

            TESetSelect(selStart, selEnd + 1, theTE);

            TECut(theTE);

            TESetScrapLength(TEGetScrapLength() - 1);

            ZeroScrap();

            TEToScrap();

            characters--;

        } else {

            TECut(theTE);

        }

    } else {

        TECut(theTE);

    }

    return(characters);

}

//

//  TEIPaste is an intelligent version of TEPaste. When pasting into a sentence,

//  an extra space may be added to either the start or end of the insertion

//  to maintain readibility of the resulting sentence. Optionally, pointers

//  may be provided to spaceBefore and/or spaceAfter. These flags return

//  true if a space was inserted before or after the insertion respectively.

//

//  NOTE: This function does not always work properly. It still needs work.

//

short TEIPaste(TEHandle theTE, short *spaceBefore, short *spaceAfter)

{   OffsetTable     startOffsets, endOffsets;

    short           addSpaceAfter, characters;

    characters = (**theTE).selStart - (**theTE).selEnd;

    if (spaceBefore)

        *spaceBefore = false;

    if (spaceAfter)

        *spaceAfter  = false;

    FindWord(*((**theTE).hText), (**theTE).teLength, (**theTE).selStart, false,

                    0L, startOffsets);

    FindWord(*((**theTE).hText), (**theTE).teLength, (**theTE).selEnd, true,

                    0L, endOffsets);

    addSpaceAfter = ((endOffsets[0].offFirst == (**theTE).selEnd) &&

                     ((*((**theTE).hText))[(**theTE).selEnd] != ' '));

    if ((startOffsets[0].offSecond == (**theTE).selStart) &&

            ((*((**theTE).hText))[(**theTE).selStart - 1] != ' ')) {

        TEKey(' ', theTE);

        characters++;

        if (spaceBefore)

            *spaceBefore = true;

    }

    TEPaste(theTE);

    characters += TEGetScrapLength();

    if (addSpaceAfter) {

        TEKey(' ', theTE);

        characters++;

        if (spaceAfter)

            *spaceAfter = true;

    }

    return(characters);

}

//

//  TEIsFrontOfLine, given an offset and a TextEdit handle, returns true if

//  the given offset is at the beginning of a line start.

//

short TEIsFrontOfLine(short offset, TEHandle theTE)

{   short       line = 0;

    if ((**theTE).teLength == 0)

        return(true);

    if (offset >= (**theTE).teLength)

        return( (*((**theTE).hText))[(**theTE).teLength - 1] == 0x0d );

    while ((**theTE).lineStarts[line] < offset)

        line++;

    return( (**theTE).lineStarts[line] == offset );

}

//

//  TEGetLine, given an offset and a TextEdit handle, returns the line number

//  of the line that contains the offset.

//

short TEGetLine(short offset, TEHandle theTE)

{   short       line = 0;

    if (offset > (**theTE).teLength)

        return((**theTE).nLines);

    while ((**theTE).lineStarts[line] < offset)

        line++;

    return(line);

}