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ocaml.vim
" Language: OCaml " Maintainer: David Baelde <firstname.name@ens-lyon.org> " Mike Leary <leary@nwlink.com> " Markus Mottl <markus.mottl@gmail.com> " Pierre Vittet <pierre-vittet@pvittet.com> " Stefano Zacchiroli <zack@bononia.it> " Vincent Aravantinos <firstname.name@imag.fr> " URL: http://www.ocaml.info/vim/ftplugin/ocaml.vim " Last Change: " 2013 Jul 26 - load default compiler settings (MM) " 2013 Jul 24 - removed superfluous efm-setting (MM) " 2013 Jul 22 - applied fixes supplied by Hirotaka Hamada (MM) " 2013 Mar 15 - Improved error format (MM) if exists("b:did_ftplugin") finish endif let b:did_ftplugin=1 " Use standard compiler settings unless user wants otherwise if !exists("current_compiler") :compiler ocaml endif " some macro if exists('*fnameescape') function! s:Fnameescape(s) return fnameescape(a:s) endfun else function! s:Fnameescape(s) return escape(a:s," \t\n*?[{`$\\%#'\"|!<") endfun endif " Error handling -- helps moving where the compiler wants you to go let s:cposet=&cpoptions set cpo&vim " Add mappings, unless the user didn't want this. if !exists("no_plugin_maps") && !exists("no_ocaml_maps") " (un)commenting if !hasmapto('<Plug>Comment') nmap <buffer> <LocalLeader>c <Plug>LUncomOn xmap <buffer> <LocalLeader>c <Plug>BUncomOn nmap <buffer> <LocalLeader>C <Plug>LUncomOff xmap <buffer> <LocalLeader>C <Plug>BUncomOff endif nnoremap <buffer> <Plug>LUncomOn gI(* <End> *)<ESC> nnoremap <buffer> <Plug>LUncomOff :s/^(\* \(.*\) \*)/\1/<CR>:noh<CR> xnoremap <buffer> <Plug>BUncomOn <ESC>:'<,'><CR>`<O<ESC>0i(*<ESC>`>o<ESC>0i*)<ESC>`< xnoremap <buffer> <Plug>BUncomOff <ESC>:'<,'><CR>`<dd`>dd`< nmap <buffer> <LocalLeader>s <Plug>OCamlSwitchEdit nmap <buffer> <LocalLeader>S <Plug>OCamlSwitchNewWin nmap <buffer> <LocalLeader>t <Plug>OCamlPrintType xmap <buffer> <LocalLeader>t <Plug>OCamlPrintType endif " Let % jump between structure elements (due to Issac Trotts) let b:mw = '' let b:mw = b:mw . ',\<let\>:\<and\>:\(\<in\>\|;;\)' let b:mw = b:mw . ',\<if\>:\<then\>:\<else\>' let b:mw = b:mw . ',\<\(for\|while\)\>:\<do\>:\<done\>,' let b:mw = b:mw . ',\<\(object\|sig\|struct\|begin\)\>:\<end\>' let b:mw = b:mw . ',\<\(match\|try\)\>:\<with\>' let b:match_words = b:mw let b:match_ignorecase=0 " switching between interfaces (.mli) and implementations (.ml) if !exists("g:did_ocaml_switch") let g:did_ocaml_switch = 1 nnoremap <Plug>OCamlSwitchEdit :<C-u>call OCaml_switch(0)<CR> nnoremap <Plug>OCamlSwitchNewWin :<C-u>call OCaml_switch(1)<CR> fun OCaml_switch(newwin) if (match(bufname(""), "\\.mli$") >= 0) let fname = s:Fnameescape(substitute(bufname(""), "\\.mli$", ".ml", "")) if (a:newwin == 1) exec "new " . fname else exec "arge " . fname endif elseif (match(bufname(""), "\\.ml$") >= 0) let fname = s:Fnameescape(bufname("")) . "i" if (a:newwin == 1) exec "new " . fname else exec "arge " . fname endif endif endfun endif " Folding support " Get the modeline because folding depends on indentation let s:s = line2byte(line('.'))+col('.')-1 if search('^\s*(\*:o\?caml:') let s:modeline = getline(".") else let s:modeline = "" endif if s:s > 0 exe 'goto' s:s endif " Get the indentation params let s:m = matchstr(s:modeline,'default\s*=\s*\d\+') if s:m != "" let s:idef = matchstr(s:m,'\d\+') elseif exists("g:omlet_indent") let s:idef = g:omlet_indent else let s:idef = 2 endif let s:m = matchstr(s:modeline,'struct\s*=\s*\d\+') if s:m != "" let s:i = matchstr(s:m,'\d\+') elseif exists("g:omlet_indent_struct") let s:i = g:omlet_indent_struct else let s:i = s:idef endif " Set the folding method if exists("g:ocaml_folding") setlocal foldmethod=expr setlocal foldexpr=OMLetFoldLevel(v:lnum) endif let b:undo_ftplugin = "setlocal efm< foldmethod< foldexpr<" \ . "| unlet! b:mw b:match_words b:match_ignorecase" " - Only definitions below, executed once ------------------------------------- if exists("*OMLetFoldLevel") finish endif function s:topindent(lnum) let l = a:lnum while l > 0 if getline(l) =~ '\s*\%(\<struct\>\|\<sig\>\|\<object\>\)' return indent(l) endif let l = l-1 endwhile return -s:i endfunction function OMLetFoldLevel(l) " This is for not merging blank lines around folds to them if getline(a:l) !~ '\S' return -1 endif " We start folds for modules, classes, and every toplevel definition if getline(a:l) =~ '^\s*\%(\<val\>\|\<module\>\|\<class\>\|\<type\>\|\<method\>\|\<initializer\>\|\<inherit\>\|\<exception\>\|\<external\>\)' exe 'return ">' (indent(a:l)/s:i)+1 '"' endif " Toplevel let are detected thanks to the indentation if getline(a:l) =~ '^\s*let\>' && indent(a:l) == s:i+s:topindent(a:l) exe 'return ">' (indent(a:l)/s:i)+1 '"' endif " We close fold on end which are associated to struct, sig or object. " We use syntax information to do that. if getline(a:l) =~ '^\s*end\>' && synIDattr(synID(a:l, indent(a:l)+1, 0), "name") != "ocamlKeyword" return (indent(a:l)/s:i)+1 endif " Folds end on ;; if getline(a:l) =~ '^\s*;;' exe 'return "<' (indent(a:l)/s:i)+1 '"' endif " Comments around folds aren't merged to them. if synIDattr(synID(a:l, indent(a:l)+1, 0), "name") == "ocamlComment" return -1 endif return '=' endfunction " Vim support for OCaml .annot files " " Last Change: 2007 Jul 17 " Maintainer: Vincent Aravantinos <vincent.aravantinos@gmail.com> " License: public domain " " Originally inspired by 'ocaml-dtypes.vim' by Stefano Zacchiroli. " The source code is quite radically different for we not use python anymore. " However this plugin should have the exact same behaviour, that's why the " following lines are the quite exact copy of Stefano's original plugin : " " << " Executing Ocaml_print_type(<mode>) function will display in the Vim bottom " line(s) the type of an ocaml value getting it from the corresponding .annot " file (if any). If Vim is in visual mode, <mode> should be "visual" and the " selected ocaml value correspond to the highlighted text, otherwise (<mode> " can be anything else) it corresponds to the literal found at the current " cursor position. " " Typing '<LocalLeader>t' (LocalLeader defaults to '\', see :h LocalLeader) " will cause " Ocaml_print_type function to be invoked with the right " argument depending on the current mode (visual or not). " >> " " If you find something not matching this behaviour, please signal it. " " Differences are: " - no need for python support " + plus : more portable " + minus: no more lazy parsing, it looks very fast however " " - ocamlbuild support, ie. " + the plugin finds the _build directory and looks for the " corresponding file inside; " + if the user decides to change the name of the _build directory thanks " to the '-build-dir' option of ocamlbuild, the plugin will manage in " most cases to find it out (most cases = if the source file has a unique " name among your whole project); " + if ocamlbuild is not used, the usual behaviour holds; ie. the .annot " file should be in the same directory as the source file; " + for vim plugin programmers: " the variable 'b:_build_dir' contains the inferred path to the build " directory, even if this one is not named '_build'. " " Bonus : " - latin1 accents are handled " - lists are handled, even on multiple lines, you don't need the visual mode " (the cursor must be on the first bracket) " - parenthesized expressions, arrays, and structures (ie. '(...)', '[|...|]', " and '{...}') are handled the same way " Copied from Stefano's original plugin : " << " .annot ocaml file representation " " File format (copied verbatim from caml-types.el) " " file ::= block * " block ::= position <SP> position <LF> annotation * " position ::= filename <SP> num <SP> num <SP> num " annotation ::= keyword open-paren <LF> <SP> <SP> data <LF> close-paren " " <SP> is a space character (ASCII 0x20) " <LF> is a line-feed character (ASCII 0x0A) " num is a sequence of decimal digits " filename is a string with the lexical conventions of O'Caml " open-paren is an open parenthesis (ASCII 0x28) " close-paren is a closed parenthesis (ASCII 0x29) " data is any sequence of characters where <LF> is always followed by " at least two space characters. " " - in each block, the two positions are respectively the start and the " end of the range described by the block. " - in a position, the filename is the name of the file, the first num " is the line number, the second num is the offset of the beginning " of the line, the third num is the offset of the position itself. " - the char number within the line is the difference between the third " and second nums. " " For the moment, the only possible keyword is \"type\"." " >> " 1. Finding the annotation file even if we use ocamlbuild " In: two strings representing paths " Out: one string representing the common prefix between the two paths function! s:Find_common_path (p1,p2) let temp = a:p2 while matchstr(a:p1,temp) == '' let temp = substitute(temp,'/[^/]*$','','') endwhile return temp endfun " After call: " " Following information have been put in s:annot_file_list, using " annot_file_name name as key: " - annot_file_path : " path to the .annot file corresponding to the " source file (dealing with ocamlbuild stuff) " - _build_path: " path to the build directory even if this one is " not named '_build' " - date_of_last annot: " Set to 0 until we load the file. It contains the " date at which the file has been loaded. function! s:Locate_annotation() let annot_file_name = s:Fnameescape(expand('%:t:r')).'.annot' if !exists ("s:annot_file_list[annot_file_name]") silent exe 'cd' s:Fnameescape(expand('%:p:h')) " 1st case : the annot file is in the same directory as the buffer (no ocamlbuild) let annot_file_path = findfile(annot_file_name,'.') if annot_file_path != '' let annot_file_path = getcwd().'/'.annot_file_path let _build_path = '' else " 2nd case : the buffer and the _build directory are in the same directory " .. " / \ " / \ " _build .ml " let _build_path = finddir('_build','.') if _build_path != '' let _build_path = getcwd().'/'._build_path let annot_file_path = findfile(annot_file_name,'_build') if annot_file_path != '' let annot_file_path = getcwd().'/'.annot_file_path endif else " 3rd case : the _build directory is in a directory higher in the file hierarchy " (it can't be deeper by ocamlbuild requirements) " .. " / \ " / \ " _build ... " \ " \ " .ml " let _build_path = finddir('_build',';') if _build_path != '' let project_path = substitute(_build_path,'/_build$','','') let path_relative_to_project = s:Fnameescape(substitute(expand('%:p:h'),project_path.'/','','')) let annot_file_path = findfile(annot_file_name,project_path.'/_build/'.path_relative_to_project) else let annot_file_path = findfile(annot_file_name,'**') "4th case : what if the user decided to change the name of the _build directory ? " -> we relax the constraints, it should work in most cases if annot_file_path != '' " 4a. we suppose the renamed _build directory is in the current directory let _build_path = matchstr(annot_file_path,'^[^/]*') if annot_file_path != '' let annot_file_path = getcwd().'/'.annot_file_path let _build_path = getcwd().'/'._build_path endif else let annot_file_name = '' "(Pierre Vittet: I have commented 4b because this was chrashing "my vim (it produced infinite loop)) " " 4b. anarchy : the renamed _build directory may be higher in the hierarchy " this will work if the file for which we are looking annotations has a unique name in the whole project " if this is not the case, it may still work, but no warranty here "let annot_file_path = findfile(annot_file_name,'**;') "let project_path = s:Find_common_path(annot_file_path,expand('%:p:h')) "let _build_path = matchstr(annot_file_path,project_path.'/[^/]*') endif endif endif endif if annot_file_path == '' throw 'E484: no annotation file found' endif silent exe 'cd' '-' let s:annot_file_list[annot_file_name]= [annot_file_path, _build_path, 0] endif endfun " This variable contain a dictionnary of list. Each element of the dictionnary " represent an annotation system. An annotation system is a list with : " - annotation file name as it's key " - annotation file path as first element of the contained list " - build path as second element of the contained list " - annot_file_last_mod (contain the date of .annot file) as third element let s:annot_file_list = {} " 2. Finding the type information in the annotation file " a. The annotation file is opened in vim as a buffer that " should be (almost) invisible to the user. " After call: " The current buffer is now the one containing the .annot file. " We manage to keep all this hidden to the user's eye. function! s:Enter_annotation_buffer(annot_file_path) let s:current_pos = getpos('.') let s:current_hidden = &l:hidden set hidden let s:current_buf = bufname('%') if bufloaded(a:annot_file_path) silent exe 'keepj keepalt' 'buffer' s:Fnameescape(a:annot_file_path) else silent exe 'keepj keepalt' 'view' s:Fnameescape(a:annot_file_path) endif call setpos(".", [0, 0 , 0 , 0]) endfun " After call: " The original buffer has been restored in the exact same state as before. function! s:Exit_annotation_buffer() silent exe 'keepj keepalt' 'buffer' s:Fnameescape(s:current_buf) let &l:hidden = s:current_hidden call setpos('.',s:current_pos) endfun " After call: " The annot file is loaded and assigned to a buffer. " This also handles the modification date of the .annot file, eg. after a " compilation (return an updated annot_file_list). function! s:Load_annotation(annot_file_name) let annot = s:annot_file_list[a:annot_file_name] let annot_file_path = annot[0] let annot_file_last_mod = 0 if exists("annot[2]") let annot_file_last_mod = annot[2] endif if bufloaded(annot_file_path) && annot_file_last_mod < getftime(annot_file_path) " if there is a more recent file let nr = bufnr(annot_file_path) silent exe 'keepj keepalt' 'bunload' nr endif if !bufloaded(annot_file_path) call s:Enter_annotation_buffer(annot_file_path) setlocal nobuflisted setlocal bufhidden=hide setlocal noswapfile setlocal buftype=nowrite call s:Exit_annotation_buffer() let annot[2] = getftime(annot_file_path) " List updated with the new date let s:annot_file_list[a:annot_file_name] = annot endif endfun "b. 'search' and 'match' work to find the type information "In: - lin1,col1: postion of expression first char " - lin2,col2: postion of expression last char "Out: - the pattern to be looked for to find the block " Must be called in the source buffer (use of line2byte) function! s:Block_pattern(lin1,lin2,col1,col2) let start_num1 = a:lin1 let start_num2 = line2byte(a:lin1) - 1 let start_num3 = start_num2 + a:col1 let path = '"\(\\"\|[^"]\)\+"' let start_pos = path.' '.start_num1.' '.start_num2.' '.start_num3 let end_num1 = a:lin2 let end_num2 = line2byte(a:lin2) - 1 let end_num3 = end_num2 + a:col2 let end_pos = path.' '.end_num1.' '.end_num2.' '.end_num3 return '^'.start_pos.' '.end_pos."$" " rq: the '^' here is not totally correct regarding the annot file "grammar" " but currently the annotation file respects this, and it's a little bit faster with the '^'; " can be removed safely. endfun "In: (the cursor position should be at the start of an annotation) "Out: the type information " Must be called in the annotation buffer (use of search) function! s:Match_data() " rq: idem as previously, in the following, the '^' at start of patterns is not necessary keepj while search('^type($','ce',line(".")) == 0 keepj if search('^.\{-}($','e') == 0 throw "no_annotation" endif keepj if searchpair('(','',')') == 0 throw "malformed_annot_file" endif endwhile let begin = line(".") + 1 keepj if searchpair('(','',')') == 0 throw "malformed_annot_file" endif let end = line(".") - 1 return join(getline(begin,end),"\n") endfun "In: the pattern to look for in order to match the block "Out: the type information (calls s:Match_data) " Should be called in the annotation buffer function! s:Extract_type_data(block_pattern, annot_file_name) let annot_file_path = s:annot_file_list[a:annot_file_name][0] call s:Enter_annotation_buffer(annot_file_path) try if search(a:block_pattern,'e') == 0 throw "no_annotation" endif call cursor(line(".") + 1,1) let annotation = s:Match_data() finally call s:Exit_annotation_buffer() endtry return annotation endfun "c. link this stuff with what the user wants " ie. get the expression selected/under the cursor let s:ocaml_word_char = '\w|[�-�]|''' "In: the current mode (eg. "visual", "normal", etc.) "Out: the borders of the expression we are looking for the type function! s:Match_borders(mode) if a:mode == "visual" let cur = getpos(".") normal `< let col1 = col(".") let lin1 = line(".") normal `> let col2 = col(".") let lin2 = line(".") call cursor(cur[1],cur[2]) return [lin1,lin2,col1-1,col2] else let cursor_line = line(".") let cursor_col = col(".") let line = getline('.') if line[cursor_col-1:cursor_col] == '[|' let [lin2,col2] = searchpairpos('\[|','','|\]','n') return [cursor_line,lin2,cursor_col-1,col2+1] elseif line[cursor_col-1] == '[' let [lin2,col2] = searchpairpos('\[','','\]','n') return [cursor_line,lin2,cursor_col-1,col2] elseif line[cursor_col-1] == '(' let [lin2,col2] = searchpairpos('(','',')','n') return [cursor_line,lin2,cursor_col-1,col2] elseif line[cursor_col-1] == '{' let [lin2,col2] = searchpairpos('{','','}','n') return [cursor_line,lin2,cursor_col-1,col2] else let [lin1,col1] = searchpos('\v%('.s:ocaml_word_char.'|\.)*','ncb') let [lin2,col2] = searchpos('\v%('.s:ocaml_word_char.'|\.)*','nce') if col1 == 0 || col2 == 0 throw "no_expression" endif return [cursor_line,cursor_line,col1-1,col2] endif endif endfun "In: the current mode (eg. "visual", "normal", etc.) "Out: the type information (calls s:Extract_type_data) function! s:Get_type(mode, annot_file_name) let [lin1,lin2,col1,col2] = s:Match_borders(a:mode) return s:Extract_type_data(s:Block_pattern(lin1,lin2,col1,col2), a:annot_file_name) endfun "In: A string destined to be printed in the 'echo buffer'. It has line "break and 2 space at each line beginning. "Out: A string destined to be yanked, without space and double space. function s:unformat_ocaml_type(res) "Remove end of line. let res = substitute (a:res, "\n", "", "g" ) "remove double space let res =substitute(res , " ", " ", "g") "remove space at begining of string. let res = substitute(res, "^ *", "", "g") return res endfunction "d. main "In: the current mode (eg. "visual", "normal", etc.) "After call: the type information is displayed if !exists("*Ocaml_get_type") function Ocaml_get_type(mode) let annot_file_name = s:Fnameescape(expand('%:t:r')).'.annot' call s:Locate_annotation() call s:Load_annotation(annot_file_name) let res = s:Get_type(a:mode, annot_file_name) " Copy result in the unnamed buffer let @" = s:unformat_ocaml_type(res) return res endfun endif if !exists("*Ocaml_get_type_or_not") function Ocaml_get_type_or_not(mode) let t=reltime() try let res = Ocaml_get_type(a:mode) return res catch return "" endtry endfun endif if !exists("*Ocaml_print_type") function Ocaml_print_type(mode) if expand("%:e") == "mli" echohl ErrorMsg | echo "No annotations for interface (.mli) files" | echohl None return endif try echo Ocaml_get_type(a:mode) catch /E484:/ echohl ErrorMsg | echo "No type annotations (.annot) file found" | echohl None catch /no_expression/ echohl ErrorMsg | echo "No expression found under the cursor" | echohl None catch /no_annotation/ echohl ErrorMsg | echo "No type annotation found for the given text" | echohl None catch /malformed_annot_file/ echohl ErrorMsg | echo "Malformed .annot file" | echohl None endtry endfun endif " Maps nnoremap <silent> <Plug>OCamlPrintType :<C-U>call Ocaml_print_type("normal")<CR> xnoremap <silent> <Plug>OCamlPrintType :<C-U>call Ocaml_print_type("visual")<CR>`< let &cpoptions=s:cposet unlet s:cposet " vim:sw=2 fdm=indent
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