" Vim syntax file generator
" Language: Vim script
" Maintainer: Hirohito Higashi (h_east)
" URL: https://github.com/vim-jp/syntax-vim-ex
" Last Change: 2024 Apr 07
" Version: 2.1.1

let s:keepcpo= &cpo
set cpo&vim

language C

function! s:parse_vim_option(opt, missing_opt, term_out_code)
	try
		let file_name = $VIM_SRCDIR . '/optiondefs.h'
		let item = {}

		new
		exec 'read ' . file_name
		norm! gg
		exec '/^.*\s*options\[\]\s*=\s*$/+1;/^\s*#\s*define\s*p_term(/-1yank a'
		exec '/^#define\s\+p_term(/+1;/^};$/-1yank b'
		%delete _

		put a
		" workaround for 'shortname'
		g/^#\s*ifdef\s*SHORT_FNAME\>/j
		g/^#/d
		g/^\s*{\s*"\w\+"\%(\s*,\s*[^,]*\)\{2}[^,]$/j
		g/^\s*{\s*"\w\+"\s*,.*$/j
		g!/^\s*{\s*"\w\+"\s*,.*$/d

		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*{\s*"\(\w\+\)"\s*,\s*\%("\(\w\+\)"\|NULL\)\s*,\s*\%([^,]*\(P_BOOL\)[^,]*\|[^,]*\)\s*,\s*\([^,]*NULL\)\?.*')
			let item.name = list[1]
			let item.short_name = list[2]
			let item.is_bool = empty(list[3]) ? 0 : 1
			if empty(list[4])
				call add(a:opt, copy(item))
			else
				call add(a:missing_opt, copy(item))
			endif
		endfor
		if empty(a:opt)
			throw 'opt is empty'
		endif
		if empty(a:missing_opt)
			throw 'missing_opt is empty'
		endif

		%delete _
		put b
		g!/^\s*p_term(\s*"\w\+"\s*,.*$/d

		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*p_term(\s*"\(\w\+\)"\s*,')
			let item.name = list[1]
			call add(a:term_out_code, copy(item))
		endfor
		quit!
		if empty(a:term_out_code)
			throw 'term_out_code is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

function! s:append_syn_vimopt(lnum, str_info, opt_list, prefix, bool_only)
	let ret_lnum = a:lnum
	let str = a:str_info.start

	for o in a:opt_list
		if !a:bool_only || o.is_bool
			if !empty(o.short_name)
				let str .= ' ' . a:prefix . o.short_name
			endif
			let str .= ' ' . a:prefix . o.name
			if len(str) > s:line_break_len
				if !empty(a:str_info.end)
					let str .= ' ' . a:str_info.end
				endif
				call append(ret_lnum, str)
				let str = a:str_info.start
				let ret_lnum += 1
			endif
		endif
	endfor
	if str !=# a:str_info.start
		if !empty(a:str_info.end)
			let str .= ' ' . a:str_info.end
		endif
		call append(ret_lnum, str)
		let ret_lnum += 1
	endif
	return ret_lnum
endfunc

" ------------------------------------------------------------------------------
function! s:parse_vim_command(cmd)
	try
		let file_name = $VIM_SRCDIR . '/ex_cmds.h'
		let item = {}

		new
		exec 'read ' . file_name
		norm! gg
		exec '/^}\?\s*cmdnames\[\]\s*=\s*$/+1;/^};/-1yank'
		%delete _
		put
		g!/^EXCMD(/d

		let lcmd = {}
		for key in range(char2nr('a'), char2nr('z'))
			let lcmd[nr2char(key)] = []
		endfor
		let lcmd['~'] = []

		for line in getline(1, line('$'))
			let list = matchlist(line, '^EXCMD(\w\+\s*,\s*"\(\a\w*\)"\s*,')
			if !empty(list)
				" Small ascii character or other.
				let key = (list[1][:0] =~# '\l') ? list[1][:0] : '~'
				call add(lcmd[key], list[1])
			endif
		endfor
		quit!

		for key in sort(keys(lcmd))
			for my in range(len(lcmd[key]))
				let omit_idx = 0
				if my > 0
					let omit_idx = (key =~# '\l') ? 1 : 0
					for idx in range(1, strlen(lcmd[key][my]))
            let spec=0
            if lcmd[key][my] ==# 'ex'
              let spec=1
              echo "cmd name:" lcmd[key][my]
            endif
						let matched = 0
						for pre in range(my - 1, 0, -1)
              if spec
                echo "pre:" pre ", my:" my
              endif
							if pre == my
                if spec
                  echo "continue"
                endif
								continue
							endif
							" for weird abbreviations for delete. (See :help :d)
							" And k{char} is used as mark. (See :help :k)
							if lcmd[key][my][:idx] ==# lcmd[key][pre][:idx] ||
							\	(key ==# 'd' &&
							\		lcmd[key][my][:idx] =~# '^d\%[elete][lp]$')
							\	|| (key ==# 'k' &&
							\		lcmd[key][my][:idx] =~# '^k[a-zA-Z]$')
								let matched = 1
								let omit_idx = idx + 1
                if spec
                  echo "match. break. omit_idx:" omit_idx
                endif
								break
							endif
						endfor
						if !matched
              if spec
                echo "not match. break"
              endif
							break
						endif
					endfor
				endif

				let item.name = lcmd[key][my]
				let item.type = s:get_vim_command_type(item.name)
				if omit_idx + 1 < strlen(item.name)
					let item.omit_idx = omit_idx
					let item.syn_str = item.name[:omit_idx] . '[' . 
					\		item.name[omit_idx+1:] . ']'
				else
					let item.omit_idx = -1
					let item.syn_str = item.name
				endif
				call add(a:cmd, copy(item))
			endfor
		endfor

		" Check exists in the help. (Usually it does not check...)
		let doc_dir = './vim/runtime/doc'
		if 0
			for vimcmd in a:cmd
				let find_ptn = '^|:' . vimcmd.name . '|\s\+'
				exec "silent! vimgrep /" . find_ptn . "/gj " . doc_dir . "/index.txt"
				let li = getqflist()
				if empty(li)
					call s:err_sanity(printf('Ex-cmd `:%s` is not found in doc/index.txt.', vimcmd.name))
				elseif len(li) > 1
					call s:err_sanity(printf('Ex-cmd `:%s` is duplicated in doc/index.txt.', vimcmd.name))
				else
					let doc_syn_str = substitute(li[0].text, find_ptn . '\(\S\+\)\s\+.*', '\1', '')
					if doc_syn_str ==# vimcmd.syn_str
						call s:err_sanity(printf('Ex-cmd `%s` short name differ in doc/index.txt. code: `%s`, document: `%s`', vimcmd.name, vimcmd.syn_str, doc_syn_str))
					endif
				endif

				if 1
				for i in range(2)
					if i || vimcmd.omit_idx >= 0
						if !i
							let base_ptn = vimcmd.name[:vimcmd.omit_idx]
						else
							let base_ptn = vimcmd.name
						endif
						let find_ptn = '\*:' . base_ptn . '\*'
						exec "silent! vimgrep /" . find_ptn . "/gj " . doc_dir . "/*.txt"
						let li = getqflist()
						if empty(li)
							call s:err_sanity(printf('Ex-cmd `:%s`%s is not found in the help tag.', base_ptn, !i ? ' (short name of `:' . vimcmd.name . '`)' : ''))
						elseif len(li) > 1
							call s:err_sanity(printf('Ex-cmd `:%s`%s is duplicated in the help tag.', base_ptn, !i ? ' (short name of `:' . vimcmd.name . '`)' : ''))
						endif
					endif
				endfor
			endif
			endfor
		endif

		" Add weird abbreviations for delete. (See :help :d)
		for i in ['l', 'p']
			let str = 'delete'
			let item.name = str . i
			let item.type = s:get_vim_command_type(item.name)
			let item.omit_idx = -1
			for x in range(strlen(str))
				let item.syn_str = str[:x] . i
				if item.syn_str !=# "del"
					call add(a:cmd, copy(item))
				endif
			endfor
		endfor

		" Required for original behavior
		let item.name = 'a'		" append
		let item.type = 0
		let item.omit_idx = -1
		let item.syn_str = item.name
		call add(a:cmd, copy(item))
		let item.name = 'i'		" insert
		let item.syn_str = item.name
		call add(a:cmd, copy(item))

		if empty(a:cmd)
			throw 'cmd is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

function! s:get_vim_command_type(cmd_name)
	" Return value:
	"   0: normal
	"   1: (Reserved)
	"   2: abbrev (without un)
	"   3: menu
	"   4: map
	"   5: mapclear
	"   6: unmap
	"   7: abclear
	"   99: (Exclude registration of "syn keyword")
	let ab_prefix   = '^[ci]\?'
	let menu_prefix = '^\%([acinostvx]\?\|tl\)'
	let map_prefix  = '^[acilnostvx]\?'
	let exclude_list =<< trim EOL
		Next
		Print
		X
		append
		augroup
		augroup
		autocmd
		behave
		catch
		def
		doautoall
		doautocmd
		echo
		echoconsole
		echoerr
		echohl
		echomsg
		echon
		echowindow
		enddef
		endfunction
		execute
		function
		insert
		map
		mapclear
		new
		normal
		popup
		set
		setglobal
		setlocal
		sleep
		smagic
		snomagic
		substitute
		syntax
		throw
		var
		vim9script
	EOL
	" Required for original behavior
	" \	'global', 'vglobal'

	if index(exclude_list, a:cmd_name) != -1
		let ret = 99
	elseif a:cmd_name =~# '^\%(\%(un\)\?abbreviate\|noreabbrev\|\l\%(nore\|un\)\?abbrev\)$'
		let ret = 2
	elseif a:cmd_name =~# ab_prefix . 'abclear$'
		let ret = 7
	elseif a:cmd_name =~# menu_prefix . '\%(nore\|un\)\?menu$'
		let ret = 3
	elseif a:cmd_name =~# map_prefix . '\%(nore\)\?map$'
		let ret = 4
	elseif a:cmd_name =~# map_prefix . 'mapclear$'
		let ret = 5
	elseif a:cmd_name =~# map_prefix . 'unmap$'
		let ret = 6
	else
		let ret = 0
	endif
	return ret
endfunc

function! s:append_syn_vimcmd(lnum, str_info, cmd_list, type)
	let ret_lnum = a:lnum
	let str = a:str_info.start

	for o in a:cmd_list
		if o.type == a:type
			let str .= ' ' . o.syn_str
			if len(str) > s:line_break_len
				if !empty(a:str_info.end)
					let str .= ' ' . a:str_info.end
				endif
				call append(ret_lnum, str)
				let str = a:str_info.start
				let ret_lnum += 1
			endif
		endif
	endfor
	if str !=# a:str_info.start
		if !empty(a:str_info.end)
			let str .= ' ' . a:str_info.end
		endif
		call append(ret_lnum, str)
		let ret_lnum += 1
	endif
	return ret_lnum
endfunc

" ------------------------------------------------------------------------------
function! s:parse_vim_event(li)
	try
		let file_name = $VIM_SRCDIR . '/autocmd.c'
		let item = {}

		new
		exec 'read ' . file_name
		norm! gg
		exec '/^static keyvalue_T event_tab\[] = {$/+1;/^};$/-1yank'
		%delete _

		put
		g!/^\s*KEYVALUE_ENTRY(/d

		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*KEYVALUE_ENTRY(EVENT_\w\+,\s*"\(\w\+\)"')
			let item.name = list[1]
			call add(a:li, copy(item))
		endfor

		quit!

		if empty(a:li)
			throw 'event is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

" ------------------------------------------------------------------------------
function! s:parse_vim_function(li)
	try
		let file_name = $VIM_SRCDIR . '/evalfunc.c'
		let item = {}

		new
		exec 'read ' . file_name
		norm! gg
		exec '/^static\s\+funcentry_T\s\+global_functions\[\]\s*=\s*$/+1;/^};/-1yank'
		%delete _

		put
		g!/^\s*{\s*"\w\+"\s*,.*$/d
		g/^\s*{\s*"test"\s*,.*$/d
		g@//\s*obsolete@d
		g@/\*\s*obsolete\s*\*/@d

		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*{\s*"\(\w\+\)"\s*,')
			let item.name = list[1]
			call add(a:li, copy(item))
		endfor

		quit!

		if empty(a:li)
			throw 'function is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

" ------------------------------------------------------------------------------
function! s:parse_vim_hlgroup(li)
	try
		let file_name = $VIM_SRCDIR . '/highlight.c'
		let item = {}

		new
		exec 'read ' . file_name
		call cursor(1, 1)
		exec '/^static\s\+char\s\+\*(highlight_init_both\[\])\s*=\%(\s*{\)\?$/+1;/^\s*};/-1yank a'
		exec '/^static\s\+char\s\+\*(highlight_init_light\[\])\s*=\%(\s*{\)\?$/+1;/^\s*};/-1yank b'
		exec '/^set_normal_colors(\%(void\)\?)$/+1;/^}$/-1yank d'
		%delete _
		put a
		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*\%(CENT(\)\?"\%(default\s\+link\s\+\)\?\(\a\+\).*",.*')
			if !empty(list)
				let item.name = list[1]
				let item.type = 'both'
				call add(a:li, copy(item))
			endif
		endfor

		%delete _
		put b
		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*\%(CENT(\)\?"\%(default\s\+link\s\+\)\?\(\a\+\).*",.*')
			if !empty(list)
				let item.name = list[1]
				let item.type = 'light'
				call add(a:li, copy(item))
			endif
		endfor

		%delete _
		put d
		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*if\s*(set_group_colors(.*"\(\a\+\)",')
			if !empty(list) && list[1] !=# 'Normal'
				let item.name = list[1]
				let item.type = 'gui'
				call add(a:li, copy(item))
			endif
		endfor

		let item.name = 'CursorIM'
		let item.type = 'gui'
		call add(a:li, copy(item))

		" The following highlight groups cannot be extracted from highlight.c
		" (TODO: extract from HIGHLIGHT_INIT ?)
		let item.name = 'LineNrAbove'
		let item.type = 'both'
		call add(a:li, copy(item))

		let item.name = 'LineNrBelow'
		let item.type = 'both'
		call add(a:li, copy(item))

		" "Conceal" is an option and cannot be used as keyword, so remove it.
		" (Separately specified as 'syn match' in vim.vim.base).
		call filter(a:li, {idx, val -> val.name !=# 'Conceal'})

		quit!

		if empty(a:li)
			throw 'hlgroup is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

" ------------------------------------------------------------------------------
function! s:parse_vim_complete_name(li)
	try
		let file_name = $VIM_SRCDIR . '/usercmd.c'
		let item = {}

		new
		exec 'read ' . file_name
		norm! gg
		exec '/^}\s*command_complete\[\]\s*=\s*$/+1;/^};/-1yank'
		%delete _

		put
		g!/^\s*{.*"\w\+"\s*}\s*,.*$/d
		g/"custom\(list\)\?"/d

		for line in getline(1, line('$'))
			let list = matchlist(line, '^\s*{.*"\(\w\+\)"\s*}\s*,')
			let item.name = list[1]
			call add(a:li, copy(item))
		endfor

		quit!

		if empty(a:li)
			throw 'complete_name is empty'
		endif
	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

" ------------------------------------------------------------------------------
function! s:append_syn_any(lnum, str_info, li)
	let ret_lnum = a:lnum
	let str = a:str_info.start

	for o in a:li
		let str .= ' ' . o.name
		if len(str) > s:line_break_len
			if !empty(a:str_info.end)
				let str .= ' ' . a:str_info.end
			endif
			call append(ret_lnum, str)
			let str = a:str_info.start
			let ret_lnum += 1
		endif
	endfor
	if str !=# a:str_info.start
		if !empty(a:str_info.end)
			let str .= ' ' . a:str_info.end
		endif
		call append(ret_lnum, str)
		let ret_lnum += 1
	endif
	return ret_lnum
endfunc

function! s:update_syntax_vim_file(vim_info)
	try
		function! s:search_and_check(kword, base_fname, str_info)
			let a:str_info.start = ''
			let a:str_info.end = ''

			let pattern = '^" GEN_SYN_VIM: ' . a:kword . '\s*,'
			let lnum = search(pattern)
			if lnum == 0
				throw 'Search pattern ''' . pattern . ''' not found in ' .
				\		a:base_fname
			endif
			let li = matchlist(getline(lnum), pattern . '\s*START_STR\s*=\s*''\(.\{-}\)''\s*,\s*END_STR\s*=\s*''\(.\{-}\)''')
			if empty(li)
				throw 'Bad str_info line:' . getline(lnum)
			endif
			let a:str_info.start = li[1]
			let a:str_info.end = li[2]
			return lnum
		endfunc

		let target_fname = 'vim.vim.rc'
		let base_fname = 'vim.vim.base'
		let str_info = {}
		let str_info.start = ''
		let str_info.end = ''

		new
		exec 'edit ' . target_fname
		%d _
		exec 'read ' . base_fname
		1delete _
		call cursor(1, 1)

		" vimCommand
		let li = a:vim_info.cmd
		" vimCommand - normal
		let lnum = s:search_and_check('vimCommand normal', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 0)

		" vimOption
		let kword = 'vimOption'
		let li = a:vim_info.opt
		" vimOption - normal
		let lnum = s:search_and_check(kword . ' normal', base_fname, str_info)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, '', 0)
		" vimOption - turn-off
		let lnum = s:search_and_check(kword . ' turn-off', base_fname, str_info)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, 'no', 1)
		" vimOption - invertible
		let lnum = s:search_and_check(kword . ' invertible', base_fname, str_info)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, 'inv', 1)
		" vimOption - term output code
		let li = a:vim_info.term_out_code
		let lnum = s:search_and_check(kword . ' term output code', base_fname, str_info)
		let lnum = s:append_syn_any(lnum, str_info, li)

		" Missing vimOption
		let li = a:vim_info.missing_opt
		let lnum = s:search_and_check('Missing vimOption', base_fname, str_info)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, '', 0)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, 'no', 1)
		let lnum = s:append_syn_vimopt(lnum, str_info, li, 'inv', 1)

		" vimAutoEvent
		let li = a:vim_info.event
		let lnum = s:search_and_check('vimAutoEvent', base_fname, str_info)
		let lnum = s:append_syn_any(lnum, str_info, li)

		" vimHLGroup
		let li = a:vim_info.hlgroup
		let lnum = s:search_and_check('vimHLGroup', base_fname, str_info)
		let lnum = s:append_syn_any(lnum, str_info, li)

		" vimFuncName
		let li = a:vim_info.func
		let lnum = s:search_and_check('vimFuncName', base_fname, str_info)
		let lnum = s:append_syn_any(lnum, str_info, li)

		" vimUserAttrbCmplt
		let li = a:vim_info.compl_name
		let lnum = s:search_and_check('vimUserAttrbCmplt', base_fname, str_info)
		let lnum = s:append_syn_any(lnum, str_info, li)

		" vimCommand - abbrev
		let kword = 'vimCommand'
		let li = a:vim_info.cmd
		let lnum = s:search_and_check(kword . ' abbrev', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 2)
		let lnum = s:search_and_check(kword . ' abclear', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 7)
		" vimCommand - map
		let lnum = s:search_and_check(kword . ' map', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 4)
		let lnum = s:search_and_check(kword . ' mapclear', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 5)
		let lnum = s:search_and_check(kword . ' unmap', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 6)
		" vimCommand - menu
		let lnum = s:search_and_check(kword . ' menu', base_fname, str_info)
		let lnum = s:append_syn_vimcmd(lnum, str_info, li, 3)

		update
		quit!

	catch /.*/
		call s:err_gen('')
		throw 'exit'
	endtry
endfunc

" ------------------------------------------------------------------------------
function! s:err_gen(arg)
	call s:write_error(a:arg, 'generator.err')
endfunc

function! s:err_sanity(arg)
	call s:write_error(a:arg, 'sanity_check.err')
endfunc

function! s:write_error(arg, fname)
	let li = []
	if !empty(v:throwpoint)
		call add(li, v:throwpoint)
	endif
	if !empty(v:exception)
		call add(li, v:exception)
	endif
	if type(a:arg) == type([])
		call extend(li, a:arg)
	elseif type(a:arg) == type("")
		if !empty(a:arg)
			call add(li, a:arg)
		endif
	endif
	if !empty(li)
		call writefile(li, a:fname, 'a')
	else
		call writefile(['UNKNOWN'], a:fname, 'a')
	endif
endfunc

" ------------------------------------------------------------------------------
try
	let s:line_break_len = 768
	let s:vim_info = {}
	let s:vim_info.opt = []
	let s:vim_info.missing_opt = []
	let s:vim_info.term_out_code = []
	let s:vim_info.cmd = []
	let s:vim_info.event = []
	let s:vim_info.func = []
	let s:vim_info.hlgroup = []
	let s:vim_info.compl_name = []

	set lazyredraw
	silent call s:parse_vim_option(s:vim_info.opt, s:vim_info.missing_opt,
	\						s:vim_info.term_out_code)
	silent call s:parse_vim_command(s:vim_info.cmd)
	silent call s:parse_vim_event(s:vim_info.event)
	silent call s:parse_vim_function(s:vim_info.func)
	silent call s:parse_vim_hlgroup(s:vim_info.hlgroup)
	silent call s:parse_vim_complete_name(s:vim_info.compl_name)

	call s:update_syntax_vim_file(s:vim_info)
	set nolazyredraw

finally
	quitall!
endtry

" ---------------------------------------------------------------------
let &cpo = s:keepcpo
unlet s:keepcpo
" vim:ts=2 sw=2