mirror of https://github.com/texmacs/doc.git
111 lines
2.9 KiB
Tcl
111 lines
2.9 KiB
Tcl
<TeXmacs|1.0.7.14>
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<style|tmdoc>
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<\body>
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<tmdoc-title|Output channels, prompts and default input>
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Besides blocks of the form
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<\quotation>
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<framed-fragment|<verbatim|<render-key|DATA_BEGIN><em|format>:<em|message><render-key|DATA_END>>>
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</quotation>
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the <TeXmacs> meta-format also allows you to use blocks of the form
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<\quotation>
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<framed-fragment|<verbatim|<render-key|DATA_BEGIN><em|channel>#<em|message><render-key|DATA_END>>>
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</quotation>
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Here <verbatim|<em|channel>> specifies an ``output channel'' to which the
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body <verbatim|<em|message>> has to be sent. The default output channel is
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<verbatim|output>, but we also provide channels <verbatim|prompt> and
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<verbatim|input> for specifying the prompt and a default input for the next
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input in a session. Default inputs may be useful for instance be useful for
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demo modes of computer algebra systems. In the future, we also plan to
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support <verbatim|error> and <verbatim|status> channels.
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<paragraph*|The <verbatim|prompt> plug-in>
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The <verbatim|prompt> plug-in shows how to use prompts. It consists of the
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files
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<\verbatim>
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\ \ \ \ <example-plugin-link|prompt/Makefile>
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\ \ \ \ <example-plugin-link|prompt/progs/init-prompt.scm>
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\ \ \ \ <example-plugin-link|prompt/src/prompt.cpp>
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</verbatim>
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The routine for displaying the next prompt is given by
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<\cpp-code>
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void
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next_input () {
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\ \ counter++;
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\ \ cout \<less\>\<less\> DATA_BEGIN \<less\>\<less\> "prompt#";
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\ \ cout \<less\>\<less\> "Input " \<less\>\<less\> counter
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\<less\>\<less\> "] ";
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\ \ cout \<less\>\<less\> DATA_END;
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}
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</cpp-code>
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This routine is both used for displaying the startup banner
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<\cpp-code>
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cout \<less\>\<less\> DATA_BEGIN \<less\>\<less\> "verbatim:";
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cout \<less\>\<less\> "A LaTeX -\<gtr\> TeXmacs converter";
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next_input ();
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cout \<less\>\<less\> DATA_END;
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cout.flush ();
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</cpp-code>
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and in the body of the main loop
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<\cpp-code>
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char buffer[100];
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cin.getline (buffer, 100, '\\n');
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cout \<less\>\<less\> DATA_BEGIN \<less\>\<less\> "verbatim:";
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cout \<less\>\<less\> DATA_BEGIN;
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cout \<less\>\<less\> "latex:$" \<less\>\<less\> buffer \<less\>\<less\>
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"$";
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cout \<less\>\<less\> DATA_END;
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next_input ();
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cout \<less\>\<less\> DATA_END;
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cout.flush ();
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</cpp-code>
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<tmdoc-copyright|1998--2002|Joris van der Hoeven>
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<tmdoc-license|Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version 1.1
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or any later version published by the Free Software Foundation; with no
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Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled "GNU Free
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Documentation License".>
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</body>
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<\initial>
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<\collection>
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<associate|language|english>
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</collection>
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</initial> |