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HELP VEDCUTBLOCK A.Sloman May 1987 Copying or cutting an arbitrary rectangular block of text in a VED buffer. vedcutblock(<int:L1>,<int:C1>,<int:L2>,<int:C2>,<bool:del>) -> <vector> Keywords: VED block delete cut copy L1,C2 represent a line and column in the VED buffer, as do L2,C2. The two positions are taken as opposite corners of a rectangular block of text to be copied into a vector of strings, returnd as the result of vedcutblock. If the last argument, del, is non-false, then the text is deleted from the VED buffer. The whole operation is performed without refreshing the screen. In order to refresh the relevant portion of the screen *VEDREFRESHBLOCK may be used. Since the first four arguments are taken to be any two opposite corners of the required block of text, the following combinations are all equivalent: L1 C1 L2 C2; L1 C2 L2 C1; L2 C2 L1 C1; L2 C1 L1 C2 This procedure is useful for packages that implement windows occupying arbitrary rectangular portions of the screen, and for programs that insert or delete blocks of text which are not made of complete lines. WARNING: It is not well defined what should happen when the rectangular block contains tabs. In order to ensure that no more is deleted than intended, the variable -vedhardtabs- is made false locally by vedcutblock. This may sometimes have the effect that the command ENTER dtb (delete text block), followed by ENTER ytb (yank text block) and similar commands may produce new text that requires re-formatting, if there are tabs in the file. See also: HELP * VED HELP * VEDBLOCKS This gives an overview of facilities for manipulating text blocks in VED, including the commands mentioned above. Related facilities are described in HELP * VEDYANKBLOCK HELP * VEDREFRESHBLOCK HELP * VEDFILLBLOCK REF * ved_cut REF * ved_d REF * ved_ds --- C.all//help/vedcutblock --- Copyright University of Sussex 1991. All rights reserved. ----------