On Tue, Aug 30, 2016 at 11:21 PM, H. Hirzel <hannes.hirzel at gmail.com> wrote:
> Hello
>
> I understand that the SISS serialisation format has been used in the
> Etoys 5.0 image to store quick guides. It is a plain text format.
>
> What does SISS stand for?

I am really bad at naming things but Umezawa-san had an
inter-implementation object exchange format called SIXX, based on XML;
SISS was based on S-Expression instead of XML.
>
> Browsing the Etoys 5.0 image .....
>
> To use SISS classes need to implement a method
>
>    sissExportSpecification
>
>
> For example for Workspace it is
>
>
> sissExportSpecification
>
>         ^ #(('contents' #sissGetContents)
>                 ('bindings' #bindings)
>                 ('acceptDroppedMorphs' #acceptsDroppingMorphForReference)
>         )
>
>
> And a method
>
> sissWriteValue
>
> Morph >> sissWriteValue
> sissWriteValue
>
>         self prepareToBeSaved.
>
>
> or
>
> Object>>sissWriteValue
> sissWriteValue
>         "Override if you wish"
>
>         ^self
>
>
> PasteUpMorph>>sissWriteValue
> sissWriteValue
>         "Override if you wish"
>
>         | new |
>         self prepareToBeSaved.
>         new _ self clone.
>         new privateSubmorphs: (submorphs reject: [:e |
>                 (e isKindOf: SolidSugarSuppliesTab)
>                         or: [(e isKindOf: Viewer)
>                                 or: [(e isKindOf: SugarNavTab)
>                                         or: [((e isKindOf: SystemWindow) and: [(e model isKindOf: Workspace) not])
>                                                 or: [(e isMemberOf: FlapTab) and: [e isGlobalFlap]]]]]]).
>         new instVarNamed: 'presenter' put: nil.
>         new instVarNamed: 'worldState' put: nil.
>         new privateExtension: self extension copy.
>         new extension removeOtherProperties.
>         self extension otherProperties keysDo: [:sym |
>                 (#(commandKeySelectors lastKeystroke locked) includes: sym) ifFalse: [
>                         new setProperty: sym toValue: (self extension valueOfProperty: sym)
>                 ].
>         ].
>
>         ^ new.
>
>
>
> Form>>
> sissWriteValue
>
>         SISSDictionaryForScanning reduceFormDepth ifTrue: [
>                 ^ (self asFormOfDepth: 8) hibernate.
>         ].
>         ^ self hibernate.
>
>
>
>
>
> An example of the format
>
> MSExpParser test1
>
>         | str1 str2 str3 |
>         str1 _ '(script :name "testscript1:" :type "Player" :player "12"
>                 (parameter :name "parameter" :type "Number" :position "1")
>                 (sequence
>                         (loop :type "repeat"
>                                 (initial (literal :value "0"))
>                                 (increment (literal :value "1"))
>                                 (test (send :type "Number"
>                 (selector :selector "+")
>                 (send :type "Number"
>                         (selector :getter "x")
>                         (literal :type "Player" :value "self"))
>                 (literal :type "Number" :value "1")))
>                                 (sequence
>                                         (assign :type "Number"
> :updating "Incr:" :property "x"
>                                                 (literal :type
> "Player" :value "4")
>                                                 (send :type "Number"
>                                                         (selector :selector "+")
>                                                         (literal :type
> "Number" :value "244.0")
>                                                         (literal :type
> "Number" :value "1")))))))'.
>
>
>
> I understand that the SISS format has been used successfully in the
> Etoys image to store quick guide projects.
>
> As far as Project saving is concerned it there a  difference between
> Etoy Quick guide projects and regular Squeak Morphic projects?

I can't remember for sure but the difference must be small.  I can't
even locate etoys-dev image on my computer in front of me so it'd need
some digging.

> Where can I find more information on the SISS format?

I'd like to know about that, too^^;

-- 
-- Yoshiki