[sage-devel] Re: Can LaTeX of strings be improved?
Hi Minh, I probably was not very clear. I know how to change printed and typeset version of a particular object that I create. What I don't like is how just plain strings are typeset: if I put "123\n 23" in a notebook cell in typeset mode and hit Shift-Enter, I will see "123 23" in a pretty font, but on a single line. And as I understand, all objects that don't have _latex_ will be typeset from _repr_ in the same way - all newlines and indentations are gone. There are such output examples in attachment to http://trac.sagemath.org/sage_trac/ticket/8694, where I have fixed it for schemes by implementing _latex_. My point is that if the default handling was a little bit more sophisticated, the output of ALL objects without _latex_ would look better. And if a user tries to output "123\n 23", then (s)he probably wants to have two lines, no matter if the output is printed or typeset. Hope this makes more sense ;-) Andrey On May 22, 10:07 pm, Minh Nguyen wrote: > Hi Andrey, > > On Sun, May 23, 2010 at 8:06 AM, Andrey Novoseltsev > wrote: > > Hello, > > Just so that we are clear... > > > When strings or objects with only _repr_ are typeset, they are just > > wrapped as a chunk of text. The main problem with it is removing line > > breaks. Another one - removing indentation. For example, if "123\n 23" > > is printed, we get > > > 123 > > 23 > > ... the printed version is done handled by how __repr__ is defined to > handle string representation of an object. > > > with 23 right under 23. The typeset version gives > > > 123 23 > > And the LaTeX typeset version is handled by how _latex_ is defined to > handle LaTeX typeset version of an object. But you might know this > already. > > -- > Regards > Minh Van Nguyen > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group athttp://groups.google.com/group/sage-devel > URL:http://www.sagemath.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Can LaTeX of strings be improved?
On May 22, 10:17 pm, Robert Bradshaw
wrote:
> Though in Sage we use _repr_, which is used by __str__, __repr__ and
> _latex_. I think this is a question about the default _latex_ which
> does some postprocessing of _repr_.
>
> sage: class A(SageObject):
> : def _repr_(self):
> : return "A\n B"
> :
> sage: latex(A())
> \texttt{A
> B}
>
> I'd imagine we could substituted all newlines with something
> (\newline?), and leading/multiple whitespace with something (~), which
> wouldn't be too hard.
>
> - Robert
Hi Robert,
That's precisely what I am talking about!
Andrey
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[sage-devel] Re: Can LaTeX of strings be improved?
1. In the notebook (or at the command line)
latex('thing-one\nthing-two')
produces
\texttt{thing-one
thing-two}
which would be useful if a string is encountered in tex's math-mode
($..$). But the "newline" would not be recognized as such by tex.
2. In the notebook,
view('thing-one\nthing-two')
produces in the "source" for the worksheet (use the "Edit" button to
see this)
"\newcommand{\Bold}[1]{\mathbf{#1}}
\hbox{thing-one
thing-two}"
(Outer guotes added in hopes this comes through email/web OK)
which is rendered (I believe by jsMath) due the CSS "math" class and
the rendering has no line break, presumably since jsMath is following
tex conventions s in (1).
3. In the notebook, with the "typeset" button checked,
'thing-one\nthing-two'
has *exactly* the same output as in (2).
~~
It looks to me like the JSMath class converts all instances of
\texttt{} to \hbox{} and this is part of view/pretty_print.
The \texttt{} seems to originally come from the str_function()
function.
So as Robert suggests, it might be easy to just modify
str_function() to replace "\n" by "\newline" and get what I think
Andrey is after. All this is processing is contained in sag/misc/
latex.py. John Palmieri might have some insights/ideas as well.
Andrey - is there anything else you'd want to have happen to a string?
Rob
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[sage-devel] Re: Can LaTeX of strings be improved?
On May 22, 9:57 pm, Rob Beezer wrote: > So as Robert suggests, it might be easy to just modify > str_function() to replace "\n" by "\newline" and get what I think That doesn't seem to work for me. > Andrey is after. All this is processing is contained in sag/misc/ > latex.py. John Palmieri might have some insights/ideas as well. I don't know about that, but I'll try: perhaps the best thing would be to use some sort of verbatim environment for LaTeX typesetting of strings. My impression is that people tried this a while ago and ran into problems -- a while ago there were comments to this effect in misc/latex.py, but they seem to have been removed, probably by me. Regardless of the approach, it has to work with actual LaTeX and also with jsMath; the current plan uses \texttt in plain LaTeX and changes this to \hbox in jsMath (because jsMath doesn't understand the command \texttt). I think jsMath has some sort of verbatim environment, so you could try using that instead of \hbox. Similarly, you could try \verb... in plain LaTeX. To implement any solution, it would probably be a good idea to search the trac server and also search sage-devel and sage-support for comments about LaTeX typesetting of strings, to make sure that the proposed solution deals successfully with all previous issues. If anyone does this searching, regardless of whether they implement any solution, it would be very helpful to record the results so that everyone has a good list of test cases. Also, please cc me on any trac ticket about this. -- John -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Can LaTeX of strings be improved?
On May 22, 10:22 pm, John H Palmieri wrote: > On May 22, 9:57 pm, Rob Beezer wrote: > > > So as Robert suggests, it might be easy to just modify > > str_function() to replace "\n" by "\newline" and get what I think > > That doesn't seem to work for me. Based on some limited testing - just editing the text version of a worksheet - would indicate that jsMath does not want to deal with \newline or \\ to break lines. With no better idea, I was able to use HTML paragraph tags to get two chunks of text on different lines, of course. Maybe a string could be chunked up based on the presence of \n, then each handled on its own, producing HTML (as currently), though deciding just when to wrap these with sounds problematic (maybe just the presence of \n would be good enough?). Rob -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Can LaTeX of strings be improved?
On 23 Mai, 08:15, Rob Beezer wrote: > Based on some limited testing - just editing the text version of a > worksheet - would indicate that jsMath does not want to deal with > \newline or \\ to break lines. With no better idea, I was able to use > HTML paragraph tags to get two chunks of text on different lines, of > course. Maybe a string could be chunked up based on the presence of > \n, then each handled on its own, producing HTML (as currently), > though deciding just when to wrap these with sounds > problematic (maybe just the presence of \n would be good enough?). I think the presence of \n indicates some ASCII art (_asciiart_()?, _is_asciiart_()?), but I would use instead of . -Leif -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
[sage-devel] Re: Can LaTeX of strings be improved?
What about using the verbatim environment of Latex ?
class A(SageObject):
def _latex_(self):
from sage.misc.latex import LatexExpr
return '\\begin{verbatim}\n123\n 23\n\\end{verbatim}'
sage: attach latex.sage
sage: latex(A())
\begin{verbatim}
123
23
\end{verbatim}
In the notebook, it works fine for me.
Alex
On 23 mai, 03:00, "Nathan O'Treally" wrote:
> On 23 Mai, 08:15, Rob Beezer wrote:
>
> > Based on some limited testing - just editing the text version of a
> > worksheet - would indicate that jsMath does not want to deal with
> > \newline or \\ to break lines. With no better idea, I was able to use
> > HTML paragraph tags to get two chunks of text on different lines, of
> > course. Maybe a string could be chunked up based on the presence of
> > \n, then each handled on its own, producing HTML (as currently),
> > though deciding just when to wrap these with sounds
> > problematic (maybe just the presence of \n would be good enough?).
>
> I think the presence of \n indicates some ASCII art (_asciiart_()?,
> _is_asciiart_()?), but I would use instead of .
>
> -Leif
>
> --
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[sage-devel] Re: Can LaTeX of strings be improved?
On May 24, 2:17 pm, ablondin
wrote:
> What about using the verbatim environment of Latex ?
>
> class A(SageObject):
>
> def _latex_(self):
> from sage.misc.latex import LatexExpr
> return '\\begin{verbatim}\n123\n 23\n\\end{verbatim}'
>
> sage: attach latex.sage
> sage: latex(A())
> \begin{verbatim}
> 123
> 23
> \end{verbatim}
>
> In the notebook, it works fine for me.
>From the notebook, try executing
view(A())
I bet you'll see a box saying
Unknown environment "verbatim"
This is because jsMath doesn't know about the verbatim environment.
The extension
might be an option here, but that doesn't seem to deal with newlines
very well.
--
John
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[sage-devel] Re: Can LaTeX of strings be improved?
You're right ! It doesn't work with the view() function. On the other
hand, when I select latex instead of sage and I enter the command
\sage{A()}
it displays 123 on the first line and 23 on the second line, with the
2's aligned properly, i.e. it handles the newlines and indentation as
desired. That said, I guess it's not a clean solution...
Alex
On 24 mai, 18:01, John H Palmieri wrote:
> On May 24, 2:17 pm, ablondin
> wrote:
>
>
>
> > What about using the verbatim environment of Latex ?
>
> > class A(SageObject):
>
> > def _latex_(self):
> > from sage.misc.latex import LatexExpr
> > return '\\begin{verbatim}\n123\n 23\n\\end{verbatim}'
>
> > sage: attach latex.sage
> > sage: latex(A())
> > \begin{verbatim}
> > 123
> > 23
> > \end{verbatim}
>
> > In the notebook, it works fine for me.
>
> From the notebook, try executing
>
> view(A())
>
> I bet you'll see a box saying
>
> Unknown environment "verbatim"
>
> This is because jsMath doesn't know about the verbatim environment.
> The extension
>
>
>
> might be an option here, but that doesn't seem to deal with newlines
> very well.
>
> --
> John
>
> --
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[sage-devel] Re: Can LaTeX of strings be improved?
On May 24, 9:11 pm, ablondin
wrote:
> You're right ! It doesn't work with the view() function. On the other
> hand, when I select latex instead of sage and I enter the command
>
> \sage{A()}
>
> it displays 123 on the first line and 23 on the second line, with the
> 2's aligned properly, i.e. it handles the newlines and indentation as
> desired. That said, I guess it's not a clean solution...
Another not clean solution: typeset strings with
\begin{verbatim}
string
\end{verbatim}
and then put "\\begin{verbatim}" in the jsmath_avoid list. This
results in inconsistent behavior: jsMath output appears in blue, while
LaTeX output appears in black.
Another option: use the \verb option for jsMath, but break the string
at newlines and typeset each line individually, inserting line breaks
explicitly in the html produced by the JSMath class in sage/misc/
latex.py.
--
John
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Re: [sage-devel] Re: Can LaTeX of strings be improved?
On Sat, May 22, 2010 at 10:57 PM, Rob Beezer wrote: > Andrey - is there anything else you'd want to have happen to a string? > > Rob > > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > Hi Rob, I will be quite happy with newlines and some kind of indentations. It may be reasonable to also typeset such things using a fixed width font, since this will take care of indentations in the best possible way, but I don't know if it worth it. After all, there is always a possibility to use "print" explicitly when one wants to see a complicated object where they are really important (e.g. I have some matrices with labels printed all around and aligned with columns). It is just annoying to type "print" all the time for things like Sequence(..., cr=True) and for my objects that have _repr_ but no _latex_. Thank you! Andrey -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
Re: [sage-devel] Re: Can LaTeX of strings be improved?
I couldnt see a solution to this in this thread so heres a related question
The following produces the exact output Id like to produce (to assign to the
_repr_ property of a class)
%latex
N(\mu,\sigma^2)
How can I set things up to do this in a (_repr_) function (as a sage
statement/function call)?
Does a function exist so I call it to produce such an output?
I was hoping something like this would work
from sage.misc.latex import pretty_print
pretty_print_default(True)
pretty_print('N('+'\mu'+','+'\sigma^2'+')')
but all it displays is
N(\mu,\sigma^2)
(hope I didnt miss something too obvious - thanks)
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