Class Text
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Class Text
 
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Hello Juan, Ken and others,
On 2/23/13, Juan Vuletich <[hidden email]> wrote: > On 2/22/2013 3:57 PM, Juan Vuletich wrote: >> ... >> In addition, most users won't need Strings but Texts, i.e. including >> attributes. The Pharo folks did a new implementation of Text that uses >> something very similar to Ropes. They call them 'extents'. I have not seen 'extents' but 'spans', see screen shot. >> This would >> be nice to have. > Apologies. My memory failed. It is TxTextModel, and is discussed > (together with other stuff like paragraph layout and morph drawing) > here: > http://forum.world.st/TxTextMorph-based-on-new-text-model-td4663219.html > . In any case, a new implementation of Strings suggest doing a new > implementation of Text... > > Cheers, > Juan Vuletich > the reference http://forum.world.st/TxTextMorph-based-on-new-text-model-td4663219.html Juan gave is about a discussion of a new TextMorph called TxTextMorph in Pharo. The source code is here http://www.smalltalkhub.com/#!/~sig/TxText but no links to documentation. I wonder if they have a more easily readable description of what they are aiming at. Anyhow the screen shot of browsing the code is attached. Half of the 20 classes have a comment. I would like to know what they perceive as the disadvantages of the current Text class in Cuis/Squeak/Pharo. And a comparison to the current Java Text editing API would be fine as well. The class comment of class Text from Cuis <citation> I represent a character string that has been marked with abstract changes in character appearance. Text associates a set of TextAttributes with each character in its character string. These attributes may be fonts, emphases such as bold or italic, or hyperling actions. Since most characters have the same attributes as their neighbors, the attributes are stored in a RunArray for efficiency. Each of my instances has string a String runs a RunArray From the comment at #deepCopy, written by Dan on 11/9/97: "Both string and runs are assumed to be read-only" </citation> This is very basic and AFAIK what text processing systems do. The Java text editing API works similar. Kind regards Hannes P.S. As far as I am concerned we do not need to discuss the issue about modeling Text now though it is interesting, of course. I mainly write this mail that it's subject line sticks out in the archive http://jvuletich.org/pipermail/cuis_jvuletich.org/ as a hook so that we can easily continue this discussion any time. _______________________________________________ Cuis mailing list [hidden email] http://jvuletich.org/mailman/listinfo/cuis_jvuletich.org |
TxModelFromPharo-Denis Kudriashov.png (109K)
Re: Class Text
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Re: Class Text
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