[Scilab-Dev] Issue with unicode exponents

[Stéphane Mottelet]

Hello,

Altough I am the author or this patch, I find this may be a bit too 
early to make the hypothesis that Scilab would be systematically 
launched in an environment that allows Unicode chars. This could be, at 
least, a rendering option (BTW we need an unified way of customizing 
display in the preferences tab). However, using a one line display seems 
an improvement to me, it allows a much better rendering of polynomials 
and rationals (see https://codereview.scilab.org/#/c/21142/). Maybe a 
intermediary step would be to use a hat notation, e.g.

--> p=(1+%i+%s)^7

p = 8-8i -56is -(84+84i)s^2 -140s^3 -(70-70i)s^4 +42is^5 +(7+7i)s^6 +s^7

The rendering of super/subscripts was very easy 40 years ago when 
terminals were printing on paper listing. See e.g. 
http://man7.org/linux/man-pages/man5/terminfo.5.html :

"If  the  terminal  can  move  up  or  down  half  a line, this can be
        indicated with hu (half-line up) and hd (half-line down).   This  is
        primarily   useful  for  superscripts  and  subscripts  on hard-copy
        terminals."

and search e.g. for enter_subscript_mode, exit_subscript_mode. Today 
none of terminal emulator supports these commands, *excepted the very 
recent release of mintty (Windows)*:

http://cygwin.1069669.n5.nabble.com/ANNOUNCEMENT-Updated-mintty-3-0-1-td146161.html

here is a excerpt of the release notes:

Highlights
    * New character attributes *superscript*, *subscript*, shadowed, 
overstrike.
    * DEC VT420 screen control features.
    * Fully VT100-compatible, including VT52 mode (with graphics).
    * Up to 6 key modifiers, including Meta (Win key) and configurable

Hence, using mintty console would allow a neat display of polynomials in 
CLI mode.

S.


Le 28/11/2019 à 23:35, Samuel Gougeon a écrit :
> Hello Antoine,
>
> Le 28/11/2019 à 23:17, Antoine ELIAS a écrit :
>> Hello Samuel,
>>
>> I'm agree with you about the issue.
>> I will try to find a way to change the console properties inside 
>> binary like when we change color in nw mode ( W/B vs B/W )
>
>
> Great.
>
>>
>> But I does not show trouble with 2 or 3 and others superscript numbers.
>>
>>
>>
>> With this configuration
>
>
> Neither does it for me, provided that this setting is done /before/ 
> running Scilab.
> By the way, /Lucida console/ is much UTF-8-richer than /Consolas/ (you 
> may test the text below in Scinotes with both fonts, and compare their 
> renderings), and superscripts 0,4-9 are bigger.
>
> Nevertheless, i am a bit afraid that with all this UTF-8 stuff, the 
> display result depends on some locales.
> When i write help pages in Notepad++ in UTF-8 encoding, when i 
> copy/past some UTF-8 (see below),
> sometimes it's OK, sometimes i get only rectangles... Not clear why..
>
> Samuel
>
> -----------------------------
>
> // http://bugzilla.scilab.org/9221
> %chars.greek.lower        =  "αβγδεϵζηθικλμνξοπρστυφϕχψωάϐέήϑίϊϰόϱςύϋΰϖώ";
> %chars.greek.upper        =  "ΑΒΓΔΕΖΗΘϴΙΪΚΛΜΝΞΟΠΡΣΤΥΫΦΧΨΩ";
> %chars.maths.logical      =  "∀∃∄∧∨⋀⋁⊼⊽⊻∁∴∵∎≍";
> %chars.maths.set          =  "∉∈∊∍∋∌∅∖⋂∩⋃∪⊂⊆⊄⊅⊇⊃⋐⋑⋒⋓";
> %chars.maths.comparisons  =  "⋘≪≤≲≳≥≫⋙≠≃≄≅≈∽≐≔≕≝";
> %chars.maths.operators    =  "−±∓∔÷×∏∐∑√∛∜⋅⋆⊕⊖⊝⊗⊘⊙⊚⊛⊜⊞⊟⊠⊡";
> %chars.maths.integdiff    =  "∂∇∆∫∬∭∮∯∰∱∲∳";
> %chars.maths.geometry     =  "°′″∟⊾∠∡∢⊥∥∦∺∻≎⊿⋕";
> %chars.maths.misc         =  "⋮⋰⋯⋱′″∝∞‰‱";
> %chars.arrows.base        =  "←↖↑↗→↘↓↙↔↕↵↱↴☇⇐⇑⇒⇓⇔⊣⊥⊢⊤";
> %chars.arrows.thick       =  "⬅⬆➞⬇➚➙➘➔➜➡➥➦➧➨➼➽";
> %chars.symbols            =  "…⋈⋔⋄♢◊♤♧♡♦♠♣♥©®™♀♂⌘♻«»🚌🚲🚩";
> %chars.stars              =  "⋆★☆✫✯✰✭✡🔯⊛⍟✪❂✻✼✹✸✶";
> //%chars.currencies = "¤$€£¥円元₪฿¢₫₣";
>
> %chars.lang.french        =  "âàäçéêèëîïôöûùüÂÀÄÇÉÊÈËÎÏÔÖÛÙÜ";
> %chars.lang.japanese.hiragana.a  =  "あかさたなはまやらわ がざだばぱ";
> %chars.lang.japanese.hiragana.i  =  "いきしちにひみ りゐ ぎじぢびぴ";
> %chars.lang.japanese.hiragana.u  =  "うくすつぬふむゆる ぐずづぶぷ";
> %chars.lang.japanese.hiragana.e  =  "えけせてねへめ れゑ げぜでべぺ";
> %chars.lang.japanese.hiragana.o  =  "おこそとのほもよろをんごぞどぼぽ";
> %chars.lang.russian.upper  =  "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ";  
> %chars.lang.russian.lower  =  "абвгдеёжзийклмнопрстуфхцчшщъыьэюя";
>
>
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-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet

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