--- /dev/null
+let s:folding_ranges = {}
+let s:textprop_name = 'vim-lsp-folding-linenr'
+
+" imports
+let s:Buffer = vital#lsp#import('VS.Vim.Buffer')
+
+function! s:find_servers() abort
+ return filter(lsp#get_allowed_servers(), 'lsp#capabilities#has_folding_range_provider(v:val)')
+endfunction
+
+function! lsp#ui#vim#folding#fold(sync) abort
+ let l:servers = s:find_servers()
+
+ if len(l:servers) == 0
+ call lsp#utils#error('Folding not supported for ' . &filetype)
+ return
+ endif
+
+ let l:server = l:servers[0]
+ call lsp#ui#vim#folding#send_request(l:server, bufnr('%'), a:sync)
+endfunction
+
+function! s:set_textprops(buf) abort
+ " Use zero-width text properties to act as a sort of "mark" in the buffer.
+ " This is used to remember the line numbers at the time the request was
+ " sent. We will let Vim handle updating the line numbers when the user
+ " inserts or deletes text.
+
+ " Skip if the buffer doesn't exist. This might happen when a buffer is
+ " opened and quickly deleted.
+ if !bufloaded(a:buf) | return | endif
+
+ " Create text property, if not already defined
+ silent! call prop_type_add(s:textprop_name, {'bufnr': a:buf, 'priority': lsp#internal#textprop#priority('folding')})
+
+ let l:line_count = s:Buffer.get_line_count(a:buf)
+
+ " First, clear all markers from the previous run
+ call prop_remove({'type': s:textprop_name, 'bufnr': a:buf}, 1, l:line_count)
+
+ " Add markers to each line
+ let l:i = 1
+ while l:i <= l:line_count
+ call prop_add(l:i, 1, {'bufnr': a:buf, 'type': s:textprop_name, 'id': l:i})
+ let l:i += 1
+ endwhile
+endfunction
+
+function! lsp#ui#vim#folding#send_request(server_name, buf, sync) abort
+ if !lsp#capabilities#has_folding_range_provider(a:server_name)
+ return
+ endif
+
+ if !g:lsp_fold_enabled
+ call lsp#log('Skip sending fold request: folding was disabled explicitly')
+ return
+ endif
+
+ if has('textprop')
+ call s:set_textprops(a:buf)
+ endif
+
+ call lsp#send_request(a:server_name, {
+ \ 'method': 'textDocument/foldingRange',
+ \ 'params': {
+ \ 'textDocument': lsp#get_text_document_identifier(a:buf)
+ \ },
+ \ 'on_notification': function('s:handle_fold_request', [a:server_name]),
+ \ 'sync': a:sync,
+ \ 'bufnr': a:buf
+ \ })
+endfunction
+
+function! s:foldexpr(server, buf, linenr) abort
+ let l:foldlevel = 0
+ let l:prefix = ''
+
+ for l:folding_range in s:folding_ranges[a:server][a:buf]
+ if type(l:folding_range) == type({}) &&
+ \ has_key(l:folding_range, 'startLine') &&
+ \ has_key(l:folding_range, 'endLine')
+ let l:start = l:folding_range['startLine'] + 1
+ let l:end = l:folding_range['endLine'] + 1
+
+ if (l:start <= a:linenr) && (a:linenr <= l:end)
+ let l:foldlevel += 1
+ endif
+
+ if l:start == a:linenr
+ let l:prefix = '>'
+ elseif l:end == a:linenr
+ let l:prefix = '<'
+ endif
+ endif
+ endfor
+
+ " Only return marker if a fold starts/ends at this line.
+ " Otherwise, return '='.
+ return (l:prefix ==# '') ? '=' : (l:prefix . l:foldlevel)
+endfunction
+
+" Searches for text property of the correct type on the given line.
+" Returns the original linenr on success, or -1 if no textprop of the correct
+" type is associated with this line.
+function! s:get_textprop_line(linenr) abort
+ let l:props = filter(prop_list(a:linenr), {idx, prop -> prop['type'] ==# s:textprop_name})
+
+ if empty(l:props)
+ return -1
+ else
+ return l:props[0]['id']
+ endif
+endfunction
+
+function! lsp#ui#vim#folding#foldexpr() abort
+ let l:servers = s:find_servers()
+
+ if len(l:servers) == 0
+ return
+ endif
+
+ let l:server = l:servers[0]
+
+ if has('textprop')
+ " Does the current line have a textprop with original line info?
+ let l:textprop_line = s:get_textprop_line(v:lnum)
+
+ if l:textprop_line == -1
+ " No information for current line available, so use indent for
+ " previous line.
+ return '='
+ else
+ " Info available, use foldexpr as it would be with original line
+ " number
+ return s:foldexpr(l:server, bufnr('%'), l:textprop_line)
+ endif
+ else
+ return s:foldexpr(l:server, bufnr('%'), v:lnum)
+ endif
+endfunction
+
+function! lsp#ui#vim#folding#foldtext() abort
+ let l:num_lines = v:foldend - v:foldstart + 1
+ let l:summary = getline(v:foldstart) . '...'
+
+ " Join all lines in the fold
+ let l:combined_lines = ''
+ let l:i = v:foldstart
+ while l:i <= v:foldend
+ let l:combined_lines .= getline(l:i) . ' '
+ let l:i += 1
+ endwhile
+
+ " Check if we're in a comment
+ let l:comment_regex = '\V' . substitute(&l:commentstring, '%s', '\\.\\*', '')
+ if l:combined_lines =~? l:comment_regex
+ let l:summary = l:combined_lines
+ endif
+
+ return l:summary . ' (' . l:num_lines . ' ' . (l:num_lines == 1 ? 'line' : 'lines') . ') '
+endfunction
+
+function! s:handle_fold_request(server, data) abort
+ if lsp#client#is_error(a:data) || !has_key(a:data, 'response') || !has_key(a:data['response'], 'result')
+ return
+ endif
+
+ let l:result = a:data['response']['result']
+
+ if type(l:result) != type([])
+ return
+ endif
+
+ let l:uri = a:data['request']['params']['textDocument']['uri']
+ let l:path = lsp#utils#uri_to_path(l:uri)
+ let l:bufnr = bufnr(l:path)
+
+ if l:bufnr < 0
+ return
+ endif
+
+ if !has_key(s:folding_ranges, a:server)
+ let s:folding_ranges[a:server] = {}
+ endif
+ let s:folding_ranges[a:server][l:bufnr] = l:result
+
+ " Set 'foldmethod' back to 'expr', which forces a re-evaluation of
+ " 'foldexpr'. Only do this if the user hasn't changed 'foldmethod',
+ " and this is the correct buffer.
+ for l:winid in win_findbuf(l:bufnr)
+ if getwinvar(l:winid, '&foldmethod') ==# 'expr'
+ call setwinvar(l:winid, '&foldmethod', 'expr')
+ endif
+ endfor
+endfunction
+
projects / etc / vim.git / blobdiff