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Sample Programs from NeXSTEP 3.3

#import "textundo.h"

@implementation WholeTextChange

/*
 * This is another variant of a TextSelChange which always records the entire
 * contents of the text object. This is useful when a particular kind of
 * change isn't restricted to the current selection. Examples include ruler
 * changes for tabs and margins, and characters entered from the keyboard.
 */

- saveBeforeChange
{
    NXSelPt start, end;

    [textView getSel:&start :&end];

    oldSel = [[[CutSelection alloc] initText:textView
	                               start:0
	                                 end:[textView textLength]] capture];
    [oldSel setVisible:start.cp :end.cp];
    return self;
}

- saveAfterChange
{
    NXSelPt start, end;

    [textView getSel:&start :&end];

    newSel = [[[CutSelection alloc] initText:textView
	                               start:0
	                                 end:[textView textLength]] capture];
    [newSel setVisible:start.cp :end.cp];
    return self;
}

- setStart:(int)start end:(int)end
{
    [newSel setVisible:start :end];
    return self;
}

@end

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