mirror of
https://git.lyx.org/repos/lyx.git
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Stuff on the LyX server should be in the Extended Features manual, not the
Customization manual. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26787 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Richard Heck
parent
c59a64a880
commit
2284351357
@ -112,7 +112,6 @@ End
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\output_changes false
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\author ""
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\author ""
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\author ""
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\end_header
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\begin_body
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@ -50,6 +50,21 @@ logicalmkup
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theorems-ams
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theorems-ams-extended
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\end_modules
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\begin_local_layout
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Format 7
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InsetLayout CharStyle:MenuItem
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LyxType charstyle
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LabelString menu
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LatexType command
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LatexName menuitem
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Font
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Family Sans
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EndFont
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Preamble
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\newcommand*{\menuitem}[1]{{\sffamily #1}}
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EndPreamble
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End
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\end_local_layout
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\language english
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\inputencoding latin1
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\font_roman default
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@ -3300,6 +3315,534 @@ labelitemi[0]{
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savelabelitemi}
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\end_layout
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\begin_layout Chapter
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The LyX Server
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\end_layout
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\begin_layout Section
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Introduction
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\end_layout
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\begin_layout Standard
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The `LyX server' allows other programs to talk to LyX, invoke LyX commands,
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and retrieve information about the LyX internal state.
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This is only intended for advanced users, but they should find it useful.
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It is by writing to the LyX server, for example, that bibliography managers,
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such as JabRef, are able to
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\begin_inset Quotes eld
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\end_inset
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push
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\begin_inset Quotes erd
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\end_inset
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citations to LyX.
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\end_layout
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\begin_layout Standard
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Please note that, at present,
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\emph on
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the server does not work on Windows
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\emph default
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®.
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\begin_inset Foot
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status collapsed
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\begin_layout Plain Layout
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There is no reason it cannot do so.
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But none of the developers on Windows® have yet implemented this functionality
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there.
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\end_layout
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\end_inset
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\end_layout
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\begin_layout Section
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Starting the LyX Server
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\end_layout
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\begin_layout Standard
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The LyX server works through the use of a pair of named pipes.
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These are usually located in
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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UserDir
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\end_layout
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\end_inset
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and have the names
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\begin_inset Quotes eld
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\end_inset
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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lyxpipe.in
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\end_layout
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\end_inset
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\begin_inset Quotes erd
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\end_inset
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and
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\begin_inset Quotes eld
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\end_inset
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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lyxpipe.out
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\end_layout
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\end_inset
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\begin_inset Quotes erd
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\end_inset
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.
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External programs write into
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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.lyxpipe.in
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\end_layout
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\end_inset
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and read back data from
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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.lyxpipe.out
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\end_layout
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\end_inset
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.
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The stem of the pipe names can be defined in the
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\begin_inset Flex CharStyle:MenuItem
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status collapsed
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\begin_layout Plain Layout
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\bar under
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T
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\bar default
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ools\SpecialChar \menuseparator
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\bar under
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P
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\bar default
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references
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\end_layout
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\end_inset
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dialog, for example
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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"/home/myhome/lyxpipe"
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\end_layout
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\end_inset
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.
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You
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\emph on
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must
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\emph default
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configure this manually in order for the server to start.
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\end_layout
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\begin_layout Standard
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LyX will add the '
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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.in
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\end_layout
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\end_inset
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' and '
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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.out
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\end_layout
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\end_inset
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' to create the pipes.
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If one of the pipes already exists, LyX will assume that another LyX process
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is already running and will not start the server.
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This means that if LyX crashes, or if for some other reason, a
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\begin_inset Quotes eld
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\end_inset
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stale
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\begin_inset Quotes erd
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\end_inset
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pipe is left in existence when LyX closes, then LyX will not start the
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server.
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(This is bug 641.) You will need to delete the pipes manually and then restart
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LyX.
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\end_layout
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\begin_layout Standard
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To have several LyX processes with servers at the same time, you have to
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use different configurations, perhaps by using separate user directories,
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each with its own
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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preferences
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\end_layout
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\end_inset
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file, for each process.
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\end_layout
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\begin_layout Standard
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If you are developing a client program, you might find it useful to enable
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debugging information from the LyX server.
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Do this by starting LyX as
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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lyx -dbg lyxserver
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\end_layout
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\end_inset
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.
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\end_layout
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\begin_layout Standard
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Other than this, there are a few points to consider:
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\end_layout
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\begin_layout Itemize
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Both server and clients must run on UNIX or OS/2 machines.
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Communications between LyX on UNIX and clients on OS/2 or vice versa is
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not possible right now.
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\end_layout
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\begin_layout Itemize
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On OS/2, only one client can connect to LyXServer at a time.
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\end_layout
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\begin_layout Itemize
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On OS/2, clients must open the input pipe with
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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O_WRONLY
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\end_layout
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\end_inset
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mode.
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\end_layout
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\begin_layout Standard
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You can find a complete example client written in C in the source distribution
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as
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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development/lyxserver/server_monitor.c
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\end_layout
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\end_inset
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.
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\end_layout
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\begin_layout Section
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Normal communication
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\end_layout
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\begin_layout Standard
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To issue a LyX call, the client writes a line of ASCII text into the input
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pipe.
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This line has the following format:
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\end_layout
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\begin_layout Quote
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LYXCMD:
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\emph on
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clientname
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\emph default
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:
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\emph on
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function
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\emph default
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:
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\emph on
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argument
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\end_layout
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\begin_layout Description
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clientname is a name that the client can choose arbitrarily.
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Its only use is that LyX will echo it if it sends an answer---so a client
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can dispatch results from different requesters.
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\end_layout
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\begin_layout Description
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function is the function you want LyX to perform.
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It is the same as the commands you'd use in the minibuffer.
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\end_layout
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\begin_layout Description
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argument is an optional argument which is meaningful only to some functions
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(for instance, the
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\begin_inset Quotes eld
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\end_inset
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self-insert
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\begin_inset Quotes erd
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\end_inset
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LFUN will insert the argument as text at the cursor position).
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\end_layout
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\begin_layout Standard
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The answer from LyX will arrive in the output pipe and be of the form
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\end_layout
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\begin_layout Quote
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INFO:
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\emph on
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clientname
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\emph default
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:
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\emph on
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function
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\emph default
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:
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\emph on
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data
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\end_layout
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\begin_layout Standard
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where
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\emph on
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clientname
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\emph default
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and
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\emph on
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function
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\emph default
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are just echoed from the command request, while
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\emph on
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data
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\emph default
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is more or less useful information filled according to how the command
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execution worked out.
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Some commands, such as
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\begin_inset Quotes eld
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\end_inset
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font-state
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\begin_inset Quotes erd
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\end_inset
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, will return information about the internal state of LyX, while other will
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return an empty data-response.
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This means that the command execution went fine.
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\end_layout
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\begin_layout Standard
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In case of errors, the response from LyX will have this form
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\end_layout
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\begin_layout Quote
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ERROR:
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\emph on
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clientname
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\emph default
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:
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\emph on
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function
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\emph default
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:
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\emph on
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error message
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\end_layout
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\begin_layout Standard
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where the
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\emph on
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error message
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\emph default
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should contain an explanation of why the command failed.
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\end_layout
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\begin_layout Standard
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Examples:
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\end_layout
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\begin_layout LyX-Code
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echo "LYXCMD:test:beginning-of-buffer:" >~/.lyxpipe.in
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\end_layout
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\begin_layout LyX-Code
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echo "LYXCMD:test:get-xy:" >~/.lyxpipe.in
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\begin_inset Newline newline
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\end_inset
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read a <~/.lyxpipe.out
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\begin_inset Newline newline
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\end_inset
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echo $a
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\end_layout
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\begin_layout Section
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Notification
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\end_layout
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\begin_layout Standard
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LyX can notify clients of events going on asynchronously.
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Currently it will only do this if the user binds a key sequence with the
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function
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\begin_inset Quotes eld
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\end_inset
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notify
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\begin_inset Quotes erd
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\end_inset
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.
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The format of the string LyX sends is as follows:
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\end_layout
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\begin_layout Quote
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\begin_inset Flex CharStyle:Code
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status collapsed
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\begin_layout Plain Layout
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NOTIFY:
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\end_layout
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\end_inset
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\emph on
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key-sequence
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\end_layout
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\begin_layout Standard
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where
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\emph on
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key-sequence
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\emph default
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is the printed representation of the key sequence that was actually typed
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by the user.
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\end_layout
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\begin_layout Standard
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This mechanism can be used to extend LyX's command set and implement macros.
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Bind some key sequence to
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\begin_inset Quotes eld
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\end_inset
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notify
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\begin_inset Quotes erd
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\end_inset
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.
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Then start a client that listens on the output pipe, dispatches the command
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according to the sequence, and starts a function that may use LyX calls
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and LyX requests to issue a command or a series of commands to LyX.
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\end_layout
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\begin_layout Section
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The simple LyX Server Protocol
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\end_layout
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\begin_layout Standard
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LyX implements a simple protocol that can be used for session management.
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All messages are of the form
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\end_layout
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\begin_layout Quote
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LYXSRV:
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\emph on
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clientname
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\emph default
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:
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\emph on
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protocol message
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\end_layout
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\begin_layout Standard
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where
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\emph on
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protocol message
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\emph default
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can be
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\begin_inset Quotes eld
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\end_inset
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hello
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\begin_inset Quotes erd
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\end_inset
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or
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\begin_inset Quotes eld
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\end_inset
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bye
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\begin_inset Quotes erd
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\end_inset
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.
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If
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\begin_inset Quotes eld
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\end_inset
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hello
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\begin_inset Quotes erd
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\end_inset
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is received from a client, LyX will report back to inform the client that
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||||
it's listening to it's messages, while
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\begin_inset Quotes eld
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\end_inset
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||||
bye
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\begin_inset Quotes erd
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\end_inset
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||||
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||||
sent from LyX will inform clients that LyX is closing.
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\end_layout
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\begin_layout Chapter
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Special Document Classes
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\end_layout
|
||||
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Loading…
Reference in New Issue
Block a user