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doc/devel/scheme/buffer/buffer-api.en.tm

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<TeXmacs|1.0.7.15>
<style|tmdoc>
<\body>
<tmdoc-title|Manipulating <TeXmacs> buffers>
<paragraph|Basic buffer management>
<\explain>
<scm|(buffer-list)><explain-synopsis|list of all buffers>
<|explain>
This routine returns the list of all open buffers.
</explain>
<\explain>
<scm|(current-buffer)><explain-synopsis|current buffer>
<|explain>
Return the current view. The program may abort if there exists no current
buffer.
</explain>
<\explain>
<scm|(path-\<gtr\>buffer <scm-arg|p>)><explain-synopsis|buffer which
contains a certain path>
<|explain>
Return the buffer which contains a certain path <scm-arg|p>, or <scm|#f>.
</explain>
<\explain>
<scm|(tree-\<gtr\>buffer <scm-arg|t>)><explain-synopsis|buffer which
contains a certain tree>
<|explain>
Return the buffer which contains a certain tree <scm-arg|t>, or <scm|#f>.
</explain>
<\explain>
<scm|(buffer-\<gtr\>views <scm-arg|buf>)><explain-synopsis|list of views
on a buffer>
<|explain>
This routine returns the list of views on the buffer <scm-arg|buf>.
</explain>
<\explain>
<scm|(buffer-\<gtr\>windows <scm-arg|buf>)><explain-synopsis|list of
windows containing buffer>
<|explain>
This routine returns the list of windows in which the buffer
<scm-arg|buf> is currently being displayed.
</explain>
<\explain>
<scm|(buffer-new)><explain-synopsis|create a new buffer>
<|explain>
Create a new buffer and returns its URL.
</explain>
<\explain>
<scm|(buffer-rename <scm-arg|buf> <scm-arg|new-name>)><explain-synopsis|create
a new buffer>
<|explain>
Give a new name <scm-arg|new-name> to the buffer <scm-arg|buf>.
</explain>
<\explain>
<scm|(switch-to-buffer <scm-arg|buf>)><explain-synopsis|switch the
editor's focus>
<|explain>
Switch the editor's focus to the buffer <scm-arg|buf>.
</explain>
<paragraph|Information associated to buffers>
<\explain>
<scm|(buffer-set <scm-arg|buf> <scm-arg|rich-t>)>
<scm|(buffer-get <scm-arg|buf>)><explain-synopsis|set/get the contents of
the buffer>
<|explain>
Set the contents of the buffer <scm-arg|buf> to the rich tree
<scm-arg|rich-t>, <abbr|resp.> get the rich contents of <scm-arg|buf>.
Rich trees do not only contain the actual body of the document, but also
some meta-data, such as its style, initial values of environment
variables, and other auxiliary data attached to the document.
</explain>
<\explain>
<scm|(buffer-set-body <scm-arg|buf> <scm-arg|t>)>
<scm|(buffer-get-body <scm-arg|buf>)><explain-synopsis|set/get the main
body of the buffer>
<|explain>
Set the main body of the buffer <scm-arg|buf> to the tree <scm-arg|t>,
<abbr|resp.> get the main body of <scm-arg|buf>.
</explain>
<\explain>
<scm|(buffer-set-master <scm-arg|buf> <scm-arg|master>)>
<scm|(buffer-get-master <scm-arg|buf>)><explain-synopsis|set/get the
master of the buffer>
<|explain>
Set the master of the buffer <scm-arg|buf> to <scm-arg|master>,
<abbr|resp.> get the master of <scm-arg|buf>. The master of a buffer
should again be a buffer. Usually, the master of a buffer is the buffer
itself. Otherwise, the buffer will behave similarly as its master in some
respects. For instance, if a buffer <verbatim|a/b.tm> admits
<verbatim|x/y.tm> as its master, then a hyperlink to <verbatim|c.tm> will
point to <verbatim|x/c.tm> and not to <verbatim|a/c.tm>.
</explain>
<\explain>
<scm|(buffer-set-title <scm-arg|buf> <scm-arg|name>)>
<scm|(buffer-get-title <scm-arg|buf>)><explain-synopsis|set/get the title
of the buffer>
<|explain>
Set the title of the buffer <scm-arg|buf> to the string <scm-arg|name>,
<abbr|resp.> get the title of <scm-arg|buf>. The title is for instance
used as the title for the window.
</explain>
<\explain>
<scm|(buffer-set-title <scm-arg|buf> <scm-arg|name>)>
<scm|(buffer-get-title <scm-arg|buf>)><explain-synopsis|set/get the title
of the buffer>
<|explain>
Set the title of the buffer <scm-arg|buf> to the string <scm-arg|name>,
<abbr|resp.> get the title of <scm-arg|buf>. The title is for instance
used as the title for the window.
</explain>
<\explain>
<scm|(buffer-last-save <scm-arg|buf>)>
<scm|(buffer-last-visited <scm-arg|buf>)><explain-synopsis|time when a
buffer was visited/saved last>
<|explain>
Return the time when the buffer <scm-arg|buf> was visited or saved last.
</explain>
<\explain>
<scm|(buffer-modified? <scm-arg|buf>)>
<scm|(buffer-pretend-saved <scm-arg|buf>)><explain-synopsis|check for
modifications since last save>
<|explain>
The predicate <scm|buffer-modified?> check whether the buffer
<scm-arg|buf> was modified since the last time it was saved. The routine
<scm|buffer-pretend-saved> can be used in order to pretend that
the<nbsp>buffer <scm-arg|buf> was saved, without actually saving it. This
can for instance be useful if no worthwhile changes occurred in the
buffer since the genuine last save.
</explain>
<paragraph|Synchronizing with the external world>
Buffers inside <TeXmacs> usually correspond to actual files on disk or
elsewhere. When changes occur on either side (<abbr|e.g.> when editing the
buffer, or modifying the file on disk using an external program), the
following routines can be used in order to synchronize the buffer inside
<TeXmacs> with its corresponding file on disk.
<\explain>
<scm|(buffer-load <scm-arg|buf>)><explain-synopsis|load buffer>
<|explain>
Retrieve the buffer <scm-arg|buf> from disk (or elsewhere). Returns
<scm|#t> on error and <scm|#f> otherwise. The format being used for
loading files is chosen as a function of the extension of <scm-arg|buf>.
</explain>
<\explain>
<scm|(buffer-save <scm-arg|buf>)><explain-synopsis|save buffer>
<|explain>
Save the buffer <scm-arg|buf> to disk (or elsewhere). Returns <scm|#t> on
error and <scm|#f> otherwise. The format being used for saving files is
chosen as a function of the extension of <scm-arg|buf>.
</explain>
<\explain>
<scm|(buffer-import <scm-arg|buf> <scm-arg|src>
<scm-arg|fm>)><explain-synopsis|import buffer>
<|explain>
Import the buffer <scm-arg|buf> from <scm-arg|src>, using the format
<scm-arg|fm>. Returns <scm|#t> on error and <scm|#f> otherwise.
</explain>
<\explain>
<scm|(buffer-export <scm-arg|buf> <scm-arg|dest>
<scm-arg|fm>)><explain-synopsis|export buffer>
<|explain>
Export the buffer <scm-arg|buf> to <scm-arg|dest>, using the format
<scm-arg|fm>. Returns <scm|#t> on error and <scm|#f> otherwise.
</explain>
<\explain>
<scm|(tree-import <scm-arg|src> <scm-arg|fm>)><explain-synopsis|import a
tree>
<|explain>
Import a tree from the URL <scm-arg|src>, using the format <scm-arg|fm>.
</explain>
<\explain>
<scm|(tree-export <scm-arg|t> <scm-arg|dest>
<scm-arg|fm>)><explain-synopsis|export a tree>
<|explain>
Export a tree to the URL <scm-arg|dest>, using the format <scm-arg|fm>.
</explain>
<tmdoc-copyright|2012|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>