how to color italics?

how to color italics?

[Steffen Wolfrum]

Hi,

for making editing easier I'd like my italics (\em) to be in PDF   
typeset colored.

Something like \setupem[color=blue]


How can this be done?

Steffen
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Re: how to color italics?

[Steffen Wolfrum]

It should be something like \Colorit{this} example:

\def\Colorit{\it\color[magenta]}


But this above never closes the italics, while ...

\def\Colorit{\strut\groupedcommand\it\color[magenta]\/}

... gives an error.


Someone can help?


St.


Am 22.09.2008 um 11:09 schrieb Steffen Wolfrum:

> Hi,
>
> for making editing easier I'd like my italics (\em) to be in PDF
> typeset colored.
>
> Something like \setupem[color=blue]
>
>
> How can this be done?
>
> Steffen
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an  
> entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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> ___________________________________________________________________________________

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Re: how to color italics?

[Taco Hoekwater]

Steffen Wolfrum wrote:
> 
> But this above never closes the italics, while ...
> 
> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
> 
> ... gives an error.
> 
> 
> Someone can help?

Worryingly lowlevel:

  \def\emphasistypeface{\it\color[magenta]}

Best wishes,
Taco
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Re: how to color italics?

[Thomas A. Schmitz]

On Sep 22, 2008, at 1:24 PM, Steffen Wolfrum wrote:

> It should be something like \Colorit{this} example:
>
> \def\Colorit{\it\color[magenta]}
>
>
> But this above never closes the italics, while ...
>
> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>
> ... gives an error.
>
>
> Someone can help?
>
>
> St.

You want your command to take an argument, so you have to mention that  
argument in the definition (untested):

\define[1]\Colorit%
   {\color[magenta]{\it #1}}

Thomas
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Re: how to color italics?

[Aditya Mahajan]

On Mon, 22 Sep 2008, Taco Hoekwater wrote:

> Steffen Wolfrum wrote:
>>
>> But this above never closes the italics, while ...
>>
>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>
>> ... gives an error.
>>
>>
>> Someone can help?
>
> Worryingly lowlevel:
>
>  \def\emphasistypeface{\it\color[magenta]}

This has to be used {\emphasistypeface ....}. If you want something that 
works as \emph{....} as well as {\emph ...} and can also be passed as an 
option to all the style= keys, try

\definealternativestyle [emph]     [{\it\color[magenta]}]     []

Aditya

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Re: how to color italics?

[Steffen Wolfrum]

Am 22.09.2008 um 13:48 schrieb Taco Hoekwater:

> Steffen Wolfrum wrote:
>>
>> But this above never closes the italics, while ...
>>
>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>
>> ... gives an error.
>>
>>
>> Someone can help?
>
> Worryingly lowlevel:
>
>  \def\emphasistypeface{\it\color[magenta]}



... this looks very close to what I wrote in the same email at top:

\def\Colorit{\it\color[magenta]}

... and this had the problem of never stopping (closing) the italics  
again!


(BTW: sorry for introducing \it, I need \em of course)

Steffen
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Re: how to color italics?

[Steffen Wolfrum]

Am 22.09.2008 um 13:48 schrieb Thomas A. Schmitz:

>
> On Sep 22, 2008, at 1:24 PM, Steffen Wolfrum wrote:
>
>> It should be something like \Colorit{this} example:
>>
>> \def\Colorit{\it\color[magenta]}
>>
>>
>> But this above never closes the italics, while ...
>>
>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>
>> ... gives an error.
>>
>>
>> Someone can help?
>>
>>
>> St.
>
> You want your command to take an argument, so you have to mention that
> argument in the definition (untested):
>
> \define[1]\Colorit%
>   {\color[magenta]{\it #1}}



... same problem as in Taco's proposal: the \it never stops


st.
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Re: how to color italics?

[Steffen Wolfrum]

Am 22.09.2008 um 13:48 schrieb Thomas A. Schmitz:

>
> On Sep 22, 2008, at 1:24 PM, Steffen Wolfrum wrote:
>
>> It should be something like \Colorit{this} example:
>>
>> \def\Colorit{\it\color[magenta]}
>>
>>
>> But this above never closes the italics, while ...
>>
>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>
>> ... gives an error.
>>
>>
>> Someone can help?
>>
>>
>> St.
>
> You want your command to take an argument, so you have to mention that
> argument in the definition (untested):
>
> \define[1]\Colorit%
>   {\color[magenta]{\it #1}}



but, hey ... what about this:


\define[1]\Colorit%
   {\color[magenta]{\groupedcommand\em\/ #1}}



Thanks for pointing it to that Thomas!

Steffen
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Re: how to color italics?

[Taco Hoekwater]

Aditya Mahajan wrote:
> On Mon, 22 Sep 2008, Taco Hoekwater wrote:
> 
>> Steffen Wolfrum wrote:
>>> But this above never closes the italics, while ...
>>>
>>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>>
>>> ... gives an error.
>>>
>>>
>>> Someone can help?
>> Worryingly lowlevel:
>>
>>  \def\emphasistypeface{\it\color[magenta]}
> 
> This has to be used {\emphasistypeface ....}. If you want something that 

No. Instead it redefines the internals of the normal \em command.

Best wishes,
Taco
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Re: how to color italics?

[Thomas A. Schmitz]

On Sep 22, 2008, at 1:58 PM, Steffen Wolfrum wrote:

> ... same problem as in Taco's proposal: the \it never stops
>
>
> st.

Then add grouping

\define[1]\Colorit%
  {\color[magenta]{\bgroup\it #1\egroup}}


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Re: how to color italics?

[Aditya Mahajan]

On Mon, 22 Sep 2008, Taco Hoekwater wrote:

> Aditya Mahajan wrote:
>> On Mon, 22 Sep 2008, Taco Hoekwater wrote:
>>
>>> Steffen Wolfrum wrote:
>>>> But this above never closes the italics, while ...
>>>>
>>>> \def\Colorit{\strut\groupedcommand\it\color[magenta]\/}
>>>>
>>>> ... gives an error.
>>>>
>>>>
>>>> Someone can help?
>>> Worryingly lowlevel:
>>>
>>>  \def\emphasistypeface{\it\color[magenta]}
>>
>> This has to be used {\emphasistypeface ....}. If you want something that
>
> No. Instead it redefines the internals of the normal \em command.

Ah, so that is why it is lowlevel. I wonder why the following does not 
work.

\setupbodyfontenvironment [default]
                           [em={\italic\color[red]}]

Aditya
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Re: how to color italics?

[Taco Hoekwater]

Aditya Mahajan wrote:
> 
> Ah, so that is why it is lowlevel. I wonder why the following does not 
> work.
> 
> \setupbodyfontenvironment [default]
>                            [em={\italic\color[red]}]

The em key is a bit extra extra special: it has to be either
'italic' or 'slanted', everything else is ignored. This is because
of the need to allow bold emphasis. (\bf\em == \bs or \bi).

I would personally be happier if it would just use whatever was
in the argument when it is *not* italic or slanted, instead of
ignoring the argument, but that's how it is.

Best wishes,
Taco
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ppchtex rotation

[Alan BRASLAU]

Hello,

I am having trouble drawing rotated molecules using ppchtex.
In the example below, I would like to draw the molecule shown in (a)
rotated as shown in (b).
I would appreciate any suggestions. Thanks.

Alan

\usemodule[chemic]
\setupchemical[width=fit]

\starttext
 \startcombination[2*1]
  {\startchemical
   \chemical[SIX,B,C,MOV2,B,C,R234,RZ234,MOV5,MOV6,B,C,R561,RZ561]
[R,R,R,R,R,R]
  \stopchemical}
  {(a)}
  {\startchemical
   \chemical[SIX,ROT2,B,C,R234,RZ234,ADJ1,ADJ1,ADJ2,B,C,ADJ1,ADJ1,ADJ4,B,C,R156,RZ156]
[R,R,R,R,R,R]
  \stopchemical}
  {(b)}
 \stopcombination
\stoptext

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Re: how to color italics?

[Hans Hagen]

Taco Hoekwater wrote:
> 
> Aditya Mahajan wrote:
>> Ah, so that is why it is lowlevel. I wonder why the following does not 
>> work.
>>
>> \setupbodyfontenvironment [default]
>>                            [em={\italic\color[red]}]
> 
> The em key is a bit extra extra special: it has to be either
> 'italic' or 'slanted', everything else is ignored. This is because
> of the need to allow bold emphasis. (\bf\em == \bs or \bi).
> 
> I would personally be happier if it would just use whatever was
> in the argument when it is *not* italic or slanted, instead of
> ignoring the argument, but that's how it is.


\def\doemphasistypeface#1#2%
   {\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v!slanted
      {#1}%
      {\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v!italic
         {#2}%
         {\doifelsevaluenothing{\??ft\fontclass\normalizedbodyfontsize\c!em}
            {\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v!slanted
               {#1}%
               {\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v!italic
                  {#2}%
                  {\getvalue{\??ft\normalizedbodyfontsize\c!em}}}}
            {\getvalue{\??ft\fontclass\normalizedbodyfontsize\c!em}}}}}

however, this does not provide italic correction, so better is:

\newtoks\everyemphasized

\unexpanded\def\em
   {\relax
    \ifdim\slantperpoint>\zeropoint
      \settrue\emneeded
    \else
      \setfalse\emneeded
    \fi
    \setemphasisboldface % new
    \ifx\fontalternative\c!it      % \ifnum\fam=\itfam
      \def\emphasistypeface{\it}\tf
    \else\ifx\fontalternative\c!sl % \ifnum\fam=\slfam
      \def\emphasistypeface{\sl}\tf
    \else\ifx\fontalternative\c!bf % \ifnum\fam=\bffam
      \emphasisboldface
    \else\ifx\fontalternative\c!bs % \ifnum\fam=\bsfam
      \def\emphasisboldface{\bs}\bf
    \else\ifx\fontalternative\c!bi % \ifnum\fam=\bifam
      \def\emphasisboldface{\bi}\bf
    \else
      \emphasistypeface
    \fi\fi\fi\fi\fi
    \the\everyemphasized
    \ifconditional\emneeded\relax
    \else
      \expandafter\aftergroup
    \fi
    \emphasiscorrection}

which provides a hook, as in:


\appendtoks
     \red
\to \everyemphasized


both mechanisms will be provided (maybe something emcolor later, when i 
can get myself motivated for such an possibly never documented feature)

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Re: how to color italics?

[Steffen Wolfrum]

Am 22.09.2008 um 15:00 schrieb Hans Hagen:

> Taco Hoekwater wrote:
>>
>> Aditya Mahajan wrote:
>>> Ah, so that is why it is lowlevel. I wonder why the following does  
>>> not
>>> work.
>>>
>>> \setupbodyfontenvironment [default]
>>>                           [em={\italic\color[red]}]
>>
>> The em key is a bit extra extra special: it has to be either
>> 'italic' or 'slanted', everything else is ignored. This is because
>> of the need to allow bold emphasis. (\bf\em == \bs or \bi).
>>
>> I would personally be happier if it would just use whatever was
>> in the argument when it is *not* italic or slanted, instead of
>> ignoring the argument, but that's how it is.
>
>
> \def\doemphasistypeface#1#2%
>   {\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v! 
> slanted
>      {#1}%
>      {\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v! 
> italic
>         {#2}%
>         {\doifelsevaluenothing{\??ft\fontclass\normalizedbodyfontsize 
> \c!em}
>            {\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v! 
> slanted
>               {#1}%
>               {\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v! 
> italic
>                  {#2}%
>                  {\getvalue{\??ft\normalizedbodyfontsize\c!em}}}}
>            {\getvalue{\??ft\fontclass\normalizedbodyfontsize\c!em}}}}}
>
> however, this does not provide italic correction, so better is:
>
> \newtoks\everyemphasized
>
> \unexpanded\def\em
>   {\relax
>    \ifdim\slantperpoint>\zeropoint
>      \settrue\emneeded
>    \else
>      \setfalse\emneeded
>    \fi
>    \setemphasisboldface % new
>    \ifx\fontalternative\c!it      % \ifnum\fam=\itfam
>      \def\emphasistypeface{\it}\tf
>    \else\ifx\fontalternative\c!sl % \ifnum\fam=\slfam
>      \def\emphasistypeface{\sl}\tf
>    \else\ifx\fontalternative\c!bf % \ifnum\fam=\bffam
>      \emphasisboldface
>    \else\ifx\fontalternative\c!bs % \ifnum\fam=\bsfam
>      \def\emphasisboldface{\bs}\bf
>    \else\ifx\fontalternative\c!bi % \ifnum\fam=\bifam
>      \def\emphasisboldface{\bi}\bf
>    \else
>      \emphasistypeface
>    \fi\fi\fi\fi\fi
>    \the\everyemphasized
>    \ifconditional\emneeded\relax
>    \else
>      \expandafter\aftergroup
>    \fi
>    \emphasiscorrection}
>
> which provides a hook, as in:
>
>
> \appendtoks
>     \red
> \to \everyemphasized



Be careful: this kills the ability of the emphasized word to be  
hyphenated!

(... at least here with MKII)

Steffen
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