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<TeXmacs|1.0.6.10>
<style|tmdoc>
<\body>
<tmdoc-title|Miscellaneous features>
Several other features are supported in order to write interfaces between
<TeXmacs> and extern applications. Some of these are very hairy or quite
specific. Let us briefly describe a few miscellaneous features:
<paragraph*|Interrupts>
The ``stop'' icon can be used in order to interrupt the evaluation of some
input. When pressing this button, <TeXmacs> will just send a
<verbatim|SIGINT> signal to your application. It expects your application
to finish the output as usual. In particular, you should close all open
<render-key|DATA_BEGIN>-blocks.
<paragraph*|Testing whether the input is complete>
Some systems start a multiline input mode as soon as you start to define a
function or when you enter an opening bracket without a matching closing
bracket. <TeXmacs> allows your application to implement a special predicate
for testing whether the input is complete. First of all, this requires you
to specify the configuration option
<\scheme-fragment>
(:test-input-done #t)
</scheme-fragment>
As soon as you will press <shortcut|(kbd-return)> in your input, <TeXmacs> will
then send the command
<\quotation>
<\framed-fragment>
<\verbatim>
<render-key|DATA_COMMAND>(input-done? <em|input-string>)<shortcut|(kbd-return)>
</verbatim>
</framed-fragment>
</quotation>
Your application should reply with a message of the form
<\quotation>
<\framed-fragment>
<verbatim|<render-key|DATA_BEGIN>scheme:<em|done><render-key|DATA_END>>
</framed-fragment>
</quotation>
where <verbatim|<em|done>> is either <scm|#t> or <scm|#f>. The
<verbatim|multiline> plug-in provides an example of this mechanism (see in
particular the file <example-plugin-link|multiline/src/multiline.cpp>).
<tmdoc-copyright|1998--2002|Joris van der Hoeven>
<tmdoc-license|Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.1
or any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled "GNU Free
Documentation License".>
</body>
<\initial>
<\collection>
<associate|language|english>
</collection>
</initial>
|
