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- "=============================================================================
- " FILE: parser.vim
- " AUTHOR: Shougo Matsushita <Shougo.Matsu at gmail.com>
- " License: MIT license
- "=============================================================================
-
- let s:Cache = neosnippet#util#get_vital().import('System.Cache.Deprecated')
-
- function! neosnippet#parser#_parse_snippets(filename) abort
- if !filereadable(a:filename)
- call neosnippet#util#print_error(
- \ printf('snippet file "%s" is not found.', a:filename))
- return {}
- endif
-
- let cache_dir = neosnippet#variables#data_dir()
- let snippets = {}
- if !s:Cache.check_old_cache(cache_dir, a:filename)
- try
- let snippets = neosnippet#helpers#json2vim(
- \ s:Cache.readfile(cache_dir, a:filename)[0])
- catch
- endtry
- endif
- if empty(snippets) || s:Cache.check_old_cache(cache_dir, a:filename)
- let [snippets, sourced] = s:parse(a:filename)
- if len(snippets) > 5 && !neosnippet#util#is_sudo() && !sourced
- call s:Cache.writefile(
- \ cache_dir, a:filename,
- \ [neosnippet#helpers#vim2json(snippets)])
- endif
- endif
-
- return snippets
- endfunction
- function! neosnippet#parser#_parse_snippet(filename, trigger) abort
- if !filereadable(a:filename)
- call neosnippet#util#print_error(
- \ printf('snippet file "%s" is not found.', a:filename))
- return {}
- endif
-
- let snippet_dict = {
- \ 'word' : join(readfile(a:filename), "\n\t"),
- \ 'name' : a:trigger,
- \ 'options' : neosnippet#parser#_initialize_snippet_options()
- \ }
-
- return neosnippet#parser#_initialize_snippet(
- \ snippet_dict, a:filename, 1, '', a:trigger)
- endfunction
-
- function! s:parse(snippets_file) abort
- let dup_check = {}
- let snippet_dict = {}
- let linenr = 1
- let snippets = {}
- let sourced = 0
-
- for line in readfile(a:snippets_file)
- if line =~ '^\h\w*.*\s$'
- " Delete spaces.
- let line = substitute(line, '\s\+$', '', '')
- endif
-
- if line =~ '^#'
- " Ignore.
- elseif line =~ '^include'
- " Include snippets file.
- for file in split(globpath(join(
- \ neosnippet#helpers#get_snippets_directory(), ','),
- \ matchstr(line, '^include\s\+\zs.*$')), '\n')
- let snippets = extend(snippets,
- \ neosnippet#parser#_parse_snippets(file))
- endfor
- elseif line =~ '^source'
- " Source Vim script file.
- for file in split(globpath(join(
- \ neosnippet#helpers#get_snippets_directory(), ','),
- \ matchstr(line, '^source\s\+\zs.*$')), '\n')
- execute 'source' fnameescape(file)
- let sourced = 1
- endfor
- elseif line =~ '^delete\s'
- let name = matchstr(line, '^delete\s\+\zs.*$')
- if name != '' && has_key(snippets, name)
- call filter(snippets, 'v:val.real_name !=# name')
- endif
- elseif line =~ '^snippet\s'
- if !empty(snippet_dict)
- " Set previous snippet.
- call s:set_snippet_dict(snippet_dict,
- \ snippets, dup_check, a:snippets_file)
- endif
-
- let snippet_dict = s:parse_snippet_name(
- \ a:snippets_file, line, linenr, dup_check)
- elseif !empty(snippet_dict)
- if line =~ '^\s' || line == ''
- if snippet_dict.word == ''
- " Substitute head tab character.
- let line = substitute(line, '^\t', '', '')
- endif
-
- let snippet_dict.word .=
- \ substitute(line, '^ *', '', '') . "\n"
- else
- call s:add_snippet_attribute(
- \ a:snippets_file, line, linenr, snippet_dict)
- endif
- endif
-
- let linenr += 1
- endfor
-
- if !empty(snippet_dict)
- " Set previous snippet.
- call s:set_snippet_dict(snippet_dict,
- \ snippets, dup_check, a:snippets_file)
- endif
-
- return [snippets, sourced]
- endfunction
-
- function! s:parse_snippet_name(snippets_file, line, linenr, dup_check) abort
- " Initialize snippet dict.
- let snippet_dict = {
- \ 'word' : '',
- \ 'linenr' : a:linenr,
- \ 'options' : neosnippet#parser#_initialize_snippet_options()
- \ }
-
- " Try using the name without the description (abbr).
- let snippet_dict.name = matchstr(a:line, '^snippet\s\+\zs\S\+')
-
- " Fall back to using the name and description (abbr) combined.
- " SnipMate snippets may have duplicate names, but different
- " descriptions (abbrs).
- let description = matchstr(a:line, '^snippet\s\+\S\+\s\+\zs.*$')
- if description != '' && description !=# snippet_dict.name
- " Convert description.
- let snippet_dict.name .= '_' .
- \ substitute(substitute(
- \ description, '\W\+', '_', 'g'), '_\+$', '', '')
- endif
-
- " Collect the description (abbr) of the snippet, if set on snippet line.
- " This is for compatibility with SnipMate-style snippets.
- let snippet_dict.abbr = matchstr(a:line,
- \ '^snippet\s\+\S\+\s\+\zs.*$')
-
- " Check for duplicated names.
- if has_key(a:dup_check, snippet_dict.name)
- let dup = a:dup_check[snippet_dict.name]
- call neosnippet#util#print_error(printf(
- \ '%s:%d is overriding `%s` from %s:%d',
- \ a:snippets_file, a:linenr, snippet_dict.name,
- \ dup.action__path, dup.action__line))
- call neosnippet#util#print_error(printf(
- \ 'Please rename the snippet name or use `delete %s`.',
- \ snippet_dict.name))
- endif
-
- return snippet_dict
- endfunction
-
- function! s:add_snippet_attribute(snippets_file, line, linenr, snippet_dict) abort
- " Allow overriding/setting of the description (abbr) of the snippet.
- " This will override what was set via the snippet line.
- if a:line =~ '^abbr\s'
- let a:snippet_dict.abbr = matchstr(a:line, '^abbr\s\+\zs.*$')
- elseif a:line =~ '^alias\s'
- let a:snippet_dict.alias = split(matchstr(a:line,
- \ '^alias\s\+\zs.*$'), '[,[:space:]]\+')
- elseif a:line =~ '^prev_word\s'
- let prev_word = matchstr(a:line,
- \ '^prev_word\s\+[''"]\zs.*\ze[''"]$')
- if prev_word == '^'
- " For backward compatibility.
- let a:snippet_dict.options.head = 1
- else
- call neosnippet#util#print_error(
- \ 'prev_word must be "^" character.')
- endif
- elseif a:line =~ '^regexp\s'
- let a:snippet_dict.regexp = matchstr(a:line,
- \ '^regexp\s\+[''"]\zs.*\ze[''"]$')
- elseif a:line =~ '^options\s\+'
- for option in split(matchstr(a:line,
- \ '^options\s\+\zs.*$'), '[,[:space:]]\+')
- if !has_key(a:snippet_dict.options, option)
- call neosnippet#util#print_error(
- \ printf('%s:%d', a:snippets_file, a:linenr))
- call neosnippet#util#print_error(
- \ printf('Invalid option name : "%s"', option))
- else
- let a:snippet_dict.options[option] = 1
- endif
- endfor
- else
- call neosnippet#util#print_error(
- \ printf('%s:%d', a:snippets_file, a:linenr))
- call neosnippet#util#print_error(
- \ printf('Invalid syntax : "%s"', a:line))
- endif
- endfunction
-
- function! s:set_snippet_dict(snippet_dict, snippets, dup_check, snippets_file) abort
- if empty(a:snippet_dict)
- return
- endif
-
- let action_pattern = '^snippet\s\+' . a:snippet_dict.name . '$'
- let snippet = neosnippet#parser#_initialize_snippet(
- \ a:snippet_dict, a:snippets_file,
- \ a:snippet_dict.linenr, action_pattern,
- \ a:snippet_dict.name)
- let a:snippets[a:snippet_dict.name] = snippet
- let a:dup_check[a:snippet_dict.name] = snippet
-
- for alias in get(a:snippet_dict, 'alias', [])
- let alias_snippet = copy(snippet)
- let alias_snippet.word = alias
-
- let a:snippets[alias] = alias_snippet
- let a:dup_check[alias] = alias_snippet
- endfor
- endfunction
-
- function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name) abort
- let a:dict.word = substitute(a:dict.word, '\n\+$', '', '')
- if a:dict.word !~ '\n'
- \ && a:dict.word !~
- \ neosnippet#get_placeholder_marker_substitute_pattern().'$'
- \ && a:dict.word !~
- \ neosnippet#get_placeholder_marker_substitute_zero_pattern()
- " Add placeholder.
- let a:dict.word .= '${0}'
- endif
-
- if !has_key(a:dict, 'abbr') || a:dict.abbr == ''
- " Set default abbr.
- let abbr = substitute(a:dict.word,
- \ neosnippet#get_placeholder_marker_pattern(). '\|'.
- \ neosnippet#get_mirror_placeholder_marker_pattern().
- \ '\|\s\+\|\n\|TARGET', ' ', 'g')
- let abbr = substitute(abbr, '\\\(\\\|`\|\$\)', '\1', 'g')
- let a:dict.abbr = a:dict.name
- else
- let abbr = a:dict.abbr
- endif
-
- let snippet = {
- \ 'word' : a:dict.name, 'snip' : a:dict.word,
- \ 'description' : a:dict.word,
- \ 'menu_template' : abbr,
- \ 'menu_abbr' : abbr,
- \ 'options' : a:dict.options,
- \ 'action__path' : a:path, 'action__line' : a:line,
- \ 'action__pattern' : a:pattern, 'real_name' : a:name,
- \}
-
- if has_key(a:dict, 'regexp')
- let snippet.regexp = a:dict.regexp
- endif
-
- return snippet
- endfunction
-
- function! neosnippet#parser#_initialize_snippet_options() abort
- return {
- \ 'head' : 0,
- \ 'word' :
- \ g:neosnippet#expand_word_boundary,
- \ 'indent' : 0,
- \ 'oneshot' : 0,
- \ }
- endfunction
-
- function! neosnippet#parser#_get_completed_snippet(completed_item, cur_text, next_text) abort
- let item = a:completed_item
-
- if strridx(a:cur_text, item.word) != len(a:cur_text) - len(item.word)
- return ''
- endif
-
- if has_key(item, 'snippet')
- return item.snippet
- endif
-
- " Set abbr
- let abbr = (item.abbr != '') ? item.abbr : item.word
- if len(item.menu) > 5
- " Combine menu.
- let abbr .= ' ' . item.menu
- endif
- if item.info != ''
- let abbr .= split(item.info, '\n')[0]
- endif
- let abbr = escape(abbr, '\')
- let pairs = neosnippet#util#get_buffer_config(
- \ &filetype, '',
- \ 'g:neosnippet#completed_pairs', 'g:neosnippet#_completed_pairs', {})
- let word_pattern = neosnippet#util#escape_pattern(item.word)
- let angle_pattern = word_pattern . '<.\+>(.*)'
- let no_key = index(keys(pairs), item.word[-1:]) < 0
- if no_key && abbr !~# word_pattern . '\%(<.\+>\)\?(.*)'
- return ''
- endif
-
- let key = no_key ? '(' : item.word[-1:]
- if a:next_text[:0] ==# key
- " Disable auto pair
- return ''
- endif
-
- let pair = pairs[key]
-
- " Make snippet arguments
- let cnt = 1
- let snippet = ''
-
- if no_key && abbr !~# angle_pattern
- " Auto key
- let snippet .= key
- endif
-
- if empty(filter(values(pairs), 'stridx(abbr, v:val) > 0'))
- " Pairs not found pattern
- let snippet .= '${' . cnt . '}'
- let cnt += 1
- endif
-
- if abbr =~# angle_pattern
- " Add angle analysis
- let snippet .= '<'
-
- let args = ''
- for arg in split(substitute(
- \ neosnippet#parser#_get_in_paren('<', '>', abbr),
- \ '<\zs.\{-}\ze>', '', 'g'), '[^[]\zs\s*,\s*')
- let args .= neosnippet#parser#_conceal_argument(arg, cnt, args)
- let cnt += 1
- endfor
- let snippet .= args
- let snippet .= '>'
-
- if no_key
- let snippet .= key
- endif
- endif
-
- let args = ''
- for arg in split(substitute(
- \ neosnippet#parser#_get_in_paren(key, pair, abbr),
- \ key.'\zs.\{-}\ze'.pair . '\|<\zs.\{-}\ze>', '', 'g'),
- \ '[^[]\zs\s*,\s*')
- if key ==# '(' && (
- \ (&filetype ==# 'python' && arg ==# 'self') ||
- \ (&filetype ==# 'rust' && arg =~# '\m^&\?\(mut \)\?self$'))
- " Ignore self argument
- continue
- endif
-
- let args .= neosnippet#parser#_conceal_argument(arg, cnt, args)
- let cnt += 1
- endfor
- let snippet .= args
-
- if key != '(' && snippet == ''
- let snippet .= '${' . cnt . '}'
- let cnt += 1
- endif
-
- let snippet .= pair
- let snippet .= '${' . cnt . '}'
-
- return snippet
- endfunction
-
- function! neosnippet#parser#_get_in_paren(key, pair, str) abort
- let s = ''
- let level = 0
- for c in split(a:str, '\zs')
- if c ==# a:key
- let level += 1
-
- if level == 1
- continue
- endif
- elseif c ==# a:pair
- if level == 1 && (s != '' || a:str =~ '()\s*(.\{-})')
- return s
- else
- let level -= 1
- endif
- endif
-
- if level > 0
- let s .= c
- endif
- endfor
-
- return ''
- endfunction
-
- function! neosnippet#parser#_conceal_argument(arg, cnt, args) abort
- let outside = ''
- let inside = ''
- if (a:args != '')
- if g:neosnippet#enable_optional_arguments
- let inside = ', '
- else
- let outside = ', '
- endif
- endif
- return printf('%s${%d:#:%s%s}', outside, a:cnt, inside, escape(a:arg, '{}'))
- endfunction
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