325 lines
9.9 KiB
VimL
325 lines
9.9 KiB
VimL
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"=============================================================================
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" File: folding.vim
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" Author: Srinath Avadhanula
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" Version: $Id: folding.vim,v 1.12.2.1 2003/11/25 20:34:54 srinathava Exp $
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" Created: Tue Apr 23 05:00 PM 2002 PST
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"
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" Description: functions to interact with Syntaxfolds.vim
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"=============================================================================
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nnoremap <unique> <Plug>Tex_RefreshFolds :call MakeTexFolds(1)<cr>
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augroup LatexSuite
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au LatexSuite User LatexSuiteFileType
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\ call Tex_Debug('folding.vim: catching LatexSuiteFileType') |
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\ call s:SetFoldOptions()
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augroup END
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" SetFoldOptions: sets maps for every buffer {{{
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" Description:
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function! <SID>SetFoldOptions()
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if exists('b:doneSetFoldOptions')
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return
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endif
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let b:doneSetFoldOptions = 1
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setlocal foldtext=TexFoldTextFunction()
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if g:Tex_Folding && g:Tex_AutoFolding
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call MakeTexFolds(0)
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endif
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if g:Tex_Folding && !hasmapto('<Plug>Tex_RefreshFolds')
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nmap <silent> <buffer> <Leader>rf <Plug>Tex_RefreshFolds
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endif
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endfunction " }}}
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" MakeTexFolds: function to create fold items for latex. {{{
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"
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" used in conjunction with MakeSyntaxFolds().
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" see ../plugin/syntaxFolds.vim for documentation
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"
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function! MakeTexFolds(force)
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if exists('g:Tex_Folding') && !g:Tex_Folding
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return
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endif
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if &ft != 'tex'
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return
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end
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" the order in which these calls are made decides the nestedness. in
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" latex, a table environment will always be embedded in either an item or
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" a section etc. not the other way around. so we first fold up all the
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" tables. and then proceed with the other regions.
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let b:numFoldItems = 0
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" ========================================================================
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" How to add new folding items {{{
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" ========================================================================
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"
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" Each of the following function calls defines a syntax fold region. Each
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" definition consists of a call to the AddSyntaxFoldItem() function.
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"
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" The order in which the folds are defined is important. Juggling the
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" order of the function calls will create havoc with folding. The
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" "deepest" folding item needs to be called first. For example, if
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" the \begin{table} environment is a subset (or lies within) the \section
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" environment, then add the definition for the \table first.
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"
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" The AddSyntaxFoldItem() function takes either 4 or 6 arguments. When it
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" is called with 4 arguments, it is equivalent to calling it with 6
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" arguments with the last two left blank (i.e as empty strings)
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"
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" The explanation for each argument is as follows:
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" startpat: a line matching this pattern defines the beginning of a fold.
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" endpat : a line matching this pattern defines the end of a fold.
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" startoff: this is the offset from the starting line at which folding will
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" actually start
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" endoff : like startoff, but gives the offset of the actual fold end from
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" the line satisfying endpat.
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" startoff and endoff are necessary when the folding region does
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" not have a specific end pattern corresponding to a start
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" pattern. for example in latex,
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" \begin{section}
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" defines the beginning of a section, but its not necessary to
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" have a corresponding
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" \end{section}
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" the section is assumed to end 1 line _before_ another section
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" starts.
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" startskip: a pattern which defines the beginning of a "skipped" region.
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"
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" For example, suppose we define a \itemize fold as follows:
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" startpat = '^\s*\\item',
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" endpat = '^\s*\\item\|^\s*\\end{\(enumerate\|itemize\|description\)}',
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" startoff = 0,
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" endoff = -1
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"
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" This defines a fold which starts with a line beginning with an
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" \item and ending one line before a line beginning with an
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" \item or \end{enumerate} etc.
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"
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" Then, as long as \item's are not nested things are fine.
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" However, once items begin to nest, the fold started by one
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" \item can end because of an \item in an \itemize
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" environment within this \item. i.e, the following can happen:
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"
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" \begin{itemize}
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" \item Some text <------- fold will start here
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" This item will contain a nested item
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" \begin{itemize} <----- fold will end here because next line contains \item...
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" \item Hello
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" \end{itemize} <----- ... instead of here.
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" \item Next item of the parent itemize
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" \end{itemize}
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"
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" Therefore, in order to completely define a folding item which
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" allows nesting, we need to also define a "skip" pattern.
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" startskip and end skip do that.
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" Leave '' when there is no nesting.
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" endskip: the pattern which defines the end of the "skip" pattern for
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" nested folds.
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"
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" Example:
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" 1. A syntax fold region for a latex section is
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" startpat = "\\section{"
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" endpat = "\\section{"
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" startoff = 0
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" endoff = -1
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" startskip = ''
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" endskip = ''
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" Note that the start and end patterns are thus the same and endoff has a
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" negative value to capture the effect of a section ending one line before
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" the next starts.
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" 2. A syntax fold region for the \itemize environment is:
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" startpat = '^\s*\\item',
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" endpat = '^\s*\\item\|^\s*\\end{\(enumerate\|itemize\|description\)}',
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" startoff = 0,
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" endoff = -1,
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" startskip = '^\s*\\begin{\(enumerate\|itemize\|description\)}',
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" endskip = '^\s*\\end{\(enumerate\|itemize\|description\)}'
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" Note the use of startskip and endskip to allow nesting.
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"
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"
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" }}}
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" ========================================================================
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" {{{ footnote
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call AddSyntaxFoldItem (
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\ '^\s*\\footnote{',
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\ '^\s*}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ intertext
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call AddSyntaxFoldItem (
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\ '^\s*\\intertext{',
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\ '^\s*}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ abstract
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{abstract}',
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\ '^\s*\\end{abstract}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ keywords
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{keywords}',
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\ '^\s*\\end{keywords}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ thebibliography
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{thebibliography}',
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\ '^\s*\\end{thebibliography}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ table
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{table}',
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\ '^\s*\\end{table}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ figure
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{figure',
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\ '^\s*\\end{figure}',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ align/alignat
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{align',
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\ '^\s*\\end{align',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ gather
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{gather',
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\ '^\s*\\end{gather',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ equation/eqnarray
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{eq',
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\ '^\s*\\end{eq',
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\ 0,
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\ 0
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\ )
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" }}}
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" {{{ items
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call AddSyntaxFoldItem (
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\ '^\s*\\item',
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\ '^\s*\\item\|^\s*\\end{\(enumerate\|itemize\|description\)}',
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\ 0,
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\ -1,
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\ '^\s*\\begin{\(enumerate\|itemize\|description\)}',
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\ '^\s*\\end{\(enumerate\|itemize\|description\)}'
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\ )
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" }}}
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" {{{ subsubsection
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call AddSyntaxFoldItem (
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\ '^\s*\\subsubsection\W',
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\ '^\s*\\appendix\W\|^\s*\\subsubsection\W\|^\s*\\subsection\W\|^\s*\\section\W\|^\s*%%fakesection\|^\s*\\chapter\W\|^\s*\\begin{slide\|^\s*\\end{document',
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\ 0,
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\ -1,
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\ )
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" }}}
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" {{{ subsection
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call AddSyntaxFoldItem (
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\ '^\s*\\subsection\W',
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\ '^\s*\\appendix\W\|^\s*\\subsection\W\|^\s*\\section\W\|^\s*%%fakesection\|^\s*\\bibliography\|^\s*\\chapter\W\|^\s*\\begin{slide\|^\s*\\begin{thebibliography\|^\s*\\end{document',
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\ 0,
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\ -1,
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\ )
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" }}}
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" {{{ section
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call AddSyntaxFoldItem (
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\ '^\s*\\section\W',
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\ '^\s*\\appendix\W\|^\s*\\section\W\|^\s*\\bibliography\|^\s*%%fakesection\|^\s*\\chapter\W\|^\s*\\begin{slide\|^\s*\\begin{thebibliography\|^\s*\\end{document',
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\ 0,
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\ -1,
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\ )
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" }}}
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" {{{ fakesection (for forcing a fold item manually)
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call AddSyntaxFoldItem (
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\ '^\s*%%fakesection',
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\ '^\s*\\appendix\W\|^\s*\\section\W\|^\s*%%fakesection\|^\s*\\bibliography\|^\s*\\chapter\W\|^\s*\\begin{slide\|^\s*\\begin{thebibliography\|^\s*\\end{document',
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\ 0,
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\ -1,
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\ )
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" }}}
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" {{{ chapter
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call AddSyntaxFoldItem(
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\ '^\s*\\chapter\W',
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\ '^\s*\\appendix\W\|^\s*\\chapter\W\|^\s*\\bibliography\|^\s*\\begin{slide\|^\s*\\begin{thebibliography\|^\s*\\end{document',
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\ 0,
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\ -1
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\ )
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" }}}
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" {{{ slide
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call AddSyntaxFoldItem (
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\ '^\s*\\begin{slide',
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\ '^\s*\\appendix\W\|^\s*\\chapter\W\|^\s*\\end{slide\|^\s*\\end{document',
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\ 0,
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\ 0
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\ )
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" }}}
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call MakeSyntaxFolds(a:force)
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normal! zv
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endfunction
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" }}}
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" TexFoldTextFunction: create fold text for folds {{{
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function! TexFoldTextFunction()
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if getline(v:foldstart) =~ '^\s*\\begin{'
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let header = matchstr(getline(v:foldstart), '^\s*\\begin{\zs\(figure\|sidewaysfigure\|table\|equation\|eqnarray\|gather\|align\|abstract\|keywords\|thebibliography\)[^}]*\ze}')
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let caption = ''
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let label = ''
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let i = v:foldstart
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while i <= v:foldend
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if getline(i) =~ '\\caption'
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let caption = matchstr(getline(i), '\\caption{\zs.*')
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let caption = substitute(caption, '\zs}[^}]*$', '', '')
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elseif getline(i) =~ '\\label'
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let label = matchstr(getline(i), '\\label{\zs.*')
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let label = substitute(label, '\zs}[^}]*$', '', '')
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end
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let i = i + 1
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endwhile
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let ftxto = foldtext()
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" if no caption found, then use the second line.
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if caption == ''
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let caption = getline(v:foldstart + 1)
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end
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let retText = matchstr(ftxto, '^[^:]*').': '.header.' ('.label.') : '.caption
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return retText
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else
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return foldtext()
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end
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endfunction
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" }}}
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" vim:fdm=marker:ff=unix:noet:ts=4:sw=4
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