mirror of https://github.com/texmacs/doc.git
108 lines
2.8 KiB
Plaintext
108 lines
2.8 KiB
Plaintext
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<TeXmacs|1.0.4.1>
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<style|tmdoc>
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<\body>
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<tmdoc-title|Sending commands to <TeXmacs>>
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The application may use <verbatim|command> as a very particular output
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format in order to send <value|scheme> commands to <TeXmacs>. In other
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words, the block
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<\quotation>
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<framed-fragment|<verbatim|<render-key|DATA_BEGIN>command:<em|cmd><render-key|DATA_END>>>
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</quotation>
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will send the command <verbatim|<em|cmd>> to <TeXmacs>. Such commands are
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executed immediately after reception of <render-key|DATA_END>. We also recall that
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such command blocks may be incorporated recursively in larger
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<render-key|DATA_BEGIN>-<render-key|DATA_END> blocks.
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<paragraph*|The <verbatim|menus> plug-in>
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The <verbatim|nested> plug-in shows how an application can modify the
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<TeXmacs> menus in an interactive way. The plug-in consists of the files
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<\verbatim>
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\ \ \ \ <example-plugin-link|menus/Makefile>
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\ \ \ \ <example-plugin-link|menus/progs/init-menus.scm>
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\ \ \ \ <example-plugin-link|menus/src/menus.cpp>
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</verbatim>
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The body of the main loop of <verbatim|menus.cpp> simply contains
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<\cpp-fragment>
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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 \<less\>\<less\> "command:(menus-add
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\\""
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\ \ \ \ \ \<less\>\<less\> buffer \<less\>\<less\> "\\")"
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\<less\>\<less\> DATA_END;
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cout \<less\>\<less\> "Added " \<less\>\<less\> buffer \<less\>\<less\> "
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to menu";
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cout \<less\>\<less\> DATA_END;
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fflush (stdout);
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</cpp-fragment>
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The <value|scheme> macro <scheme-code|menus-add> is defined in
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<verbatim|init-menus.scm>:
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<\scheme-fragment>
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(menu-bind menus-menu
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\ \ ("Hi" (insert "Hello world")))
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\;
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(menu-extend texmacs-extra-menu
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\ \ (if (equal? (get-env "prog language") "menus")
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\ \ \ \ \ \ (=\<gtr\> "Menus" (link menus-menu))))
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\;
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(define-macro (menus-add s)
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\ \ `(menu-extend menus-menu
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\ \ \ \ \ (,s (insert ,s))))
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</scheme-fragment>
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The configuration of <verbatim|menus> proceeds as usual:
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<\scheme-fragment>
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(plugin-configure menus
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\ \ (:require (url-exists-in-path? "menus.bin"))
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\ \ (:launch "menus.bin")
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\ \ (:session "Menus"))
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</scheme-fragment>
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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>
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