it's easy stuff actually :) It works like this: I modified the viper-prefix-arg-com function to introduce 4 new commands: da di ca ci. These commands will read-char to get motion command. ca and ci just call da/di, and then put viper in insert mode. da/di call the get-text-object-bounds-a/get-text-object-bounds-b function, that can return nil (no change to the buffer) or a list of two integers, (beginning end), with the boundaries of the text that will be deleted by the da/di function Then I implemented various functions that get the boundaries of the text object under the cursor, like paren blocks (I couldn't use scan-sexps in that it doesn't work well with stuff like "( ] )" ) paragraph and such. To implement the functions I used some regexs, or in the case of paren blocks, I implemented the scanners ad-hoc. For the quoted strings I also used the built-in scan-sexps, as it was most convenient to parse the sexp backwards (it's needed because of escaped quotes). I also used emacs syntax stuff, I was thinking I could put another more command that deletes stuff based on emacs' syntax classification. The get-text-object-bounds-a/i are very similar, in principle the a version will enlarge the boundaries including whitespace at the beginning/end of the text object, and eating trailing newlines too in the case of paragraphs. So, schematizing: - ca => vimpulse-ca - vimpulse-da - char = read-char - get-text-object-bounds (char ... ) - get a (beginning end) object using the relevant function: let's say char=W - vimpulse-get-vWord-bounds - englarge the boundaries with withespace and trailing newlines depending on the text object (for example for paren blocks and string I only add the quotes/parens the inner block) and return it - delete the text enclosed in the boundaries - insert-mode Hope this is clear enough, I suck a little giving overviews :) Alessandro 2009/6/22 Marius Andersen <[email protected]>:

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Fra: Alessandro Piras <[email protected]> Emne: Re: [implementations-list] Vimpulse update Til: "Stephen Bach" <[email protected]>, "Vi/Vim implementations list" <

[email protected]>

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Dato: Mandag 22. juni 2009 03.58

By the way, new update already, now there's partial text object support. Try some di(, da[, diw, das dip commands and tell me what you think.

Alessandro,

I must say I am impressed of the pace with which you implements things! I had a go at text objects myself some months ago, but never got any further than redefining the gigantic `viper-prefix-arg-com' function.

Out of curiosity, what are the technical details behind the new support?

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