Re: Lua Semantic Highlighting for Emacs

[Romulo <romuloab@...>]

On Tue, Jul 27, 2010 at 1:04 PM, Peter Odding <peter@peterodding.com> wrote:
> Romulo wrote:
>>
>> As you mentioned it.. does anyone know if there any effort to bring
>> contextual highlighting to vim's Lua file type plugin? I've never done
>> any vim plugin, so I am clueless about how difficult it might be.
>
> Inspired by this thread, I've just published the first prototype of a Vim
> plug-in that uses LuaInspect to (automatically) perform semantic
> highlighting of variables in Lua buffers. You can find installation
> instructions for the plug-in at
> http://peterodding.com/code/vim/lua-inspect/#installation

It's working great in vim 7.2 with external Lua. Thanks!

I'll try to find a way to use the current theme's color instead of the
ones hardcoded, and to catch some editing events for a faster
feedback.

--rb
>
>  - Peter Odding
>
> " Vim plug-in
> " Author: Peter Odding <peter@peterodding.com>
> " Last Change: July 27, 2010
> " URL: http://peterodding.com/code/vim/lua-inspect/
> " Version: 0.1.2
>
> " Configuration defaults. {{{1
>
> if !exists('g:lua_inspect_automatic')
>  " Set this to false (0) to disable the automatic command.
>  let g:lua_inspect_automatic = 1
> endif
>
> if !exists('g:lua_inspect_internal')
>  " Set this to false (0) to run LuaInspect inside the Lua interface for Vim.
>  " This makes it faster but less accurate because the Lua interface for Vim
>  " doesn't include io.* and half of os.* which means LuaInspect marks them
> as
>  " undefined globals...
>  let g:lua_inspect_internal = 0
> endif
>
> " (Automatic) command definitions. {{{1
>
> command! LuaInspect call s:RunLuaInspect()
>
> augroup PluginLuaInspect
>  autocmd! CursorHold,CursorHoldI * call s:AutoEnable()
> augroup END
>
> " Script local functions. {{{1
>
> function! s:AutoEnable()
>  if &filetype == 'lua' && g:lua_inspect_automatic
>    LuaInspect
>  end
> endfunction
>
> function! s:RunLuaInspect()
>  let l:text = join(getline(1, "$"), "\n")
>  if has('lua') && g:lua_inspect_internal
>    " Run LuaInspect using the Lua interface for Vim.
>    redir => listing
>    silent lua << EOF
>    if io == nil then
>      -- The Lua interface for Vim doesn't include io.*!
>      io = { type = function() end }
>    end
>    require 'luainspect4vim' (vim.eval 'l:text')
> EOF
>    redir END
>  else
>    " Run LuaInspect as an external program.
>    let listing = system("lua -e 'require\"luainspect4vim\" (io.read
> \"*a\")'", l:text)
>  endif
>  " Clear previously created highlighting.
>  call s:InitHighlighting()
>  " Highlight variables in buffer based on positions.
>  for fields in split(listing, "\n")
>    let [type, lnum, start, end] = split(fields)
>    let command = 'syntax match %s /\%%%il\%%>%ic.\+\%%<%ic/'
>    execute printf(command, type, lnum, start - 1, end + 2)
>  endfor
> endfunction
>
> function! s:InitHighlighting()
>  " Clear existing highlighting.
>  if hlexists('luaInspectGlobalDefined') | syntax clear
> luaInspectGlobalDefined | endif
>  if hlexists('luaInspectGlobalUndefined') | syntax clear
> luaInspectGlobalUndefined | endif
>  if hlexists('luaInspectLocalUnused') | syntax clear luaInspectLocalUnused |
> endif
>  if hlexists('luaInspectLocalMutated') | syntax clear luaInspectLocalMutated
> | endif
>  if hlexists('luaInspectUpValue') | syntax clear luaInspectUpValue | endif
>  if hlexists('luaInspectParam') | syntax clear luaInspectParam | endif
>  if hlexists('luaInspectLocal') | syntax clear luaInspectLocal | endif
>  if hlexists('luaInspectFieldDefined') | syntax clear luaInspectFieldDefined
> | endif
>  if hlexists('luaInspectFieldUndefined') | syntax clear
> luaInspectFieldUndefined | endif
>  " Define default styles (copied from /luainspect/scite.lua for
> consistency).
>  hi luaInspectGlobalDefined guifg=#600000
>  hi def link luaInspectGlobalUndefined WarningMsg
>  hi luaInspectLocalUnused guifg=#ffffff guibg=#0000ff
>  hi luaInspectLocalMutated gui=italic guifg=#000080
>  hi luaInspectUpValue guifg=#0000ff
>  hi luaInspectParam guifg=#000040
>  hi luaInspectLocal guifg=#000080
>  hi luaInspectFieldDefined guifg=#600000
>  hi luaInspectFieldUndefined guifg=#c00000
>  " TODO Consider the &background?
> endfunction
>
> " vim: ts=2 sw=2 et
>
>