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Diffstat (limited to 'mnv/runtime/syntax/xpm.mnv')
| -rw-r--r-- | mnv/runtime/syntax/xpm.mnv | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/mnv/runtime/syntax/xpm.mnv b/mnv/runtime/syntax/xpm.mnv new file mode 100644 index 0000000000..aa6e6ff706 --- /dev/null +++ b/mnv/runtime/syntax/xpm.mnv @@ -0,0 +1,154 @@ +" MNV syntax file +" Language: X Pixmap +" Maintainer: Ronald Schild <rs@scutum.de> +" Last Change: 2023 May 24 +" Version: 5.4n.2 +" Jemma Nelson added termguicolors support +" Dominique Pellé fixed spelling support +" Christian J. Robinson fixed use of global variables, moved +" loop into a compiled function + +" quit when a syntax file was already loaded +if exists("b:current_syntax") + finish +endif + +syn spell notoplevel + +syn keyword xpmType char +syn keyword xpmStorageClass static +syn keyword xpmTodo TODO FIXME XXX contained +syn region xpmComment start="/\*" end="\*/" contains=xpmTodo,@Spell +syn region xpmPixelString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@xpmColors + +if has("gui_running") || has("termguicolors") && &termguicolors + +def s:CreateSyntax(): void + var color = "" + var chars = "" + var colors = 0 + var cpp = 0 + var n = 0 + var lines = getline(1, '$') + + for line in lines # scanning all lines + + var s = matchstr(line, '".\{-1,}"') + + if s != "" # does line contain a string? + + if n == 0 # first string is the Values string + + var values = split(s[1 : -2]) + + # Values string invalid, bail out + if len(values) != 4 && len(values) != 6 && len(values) != 7 + return + endif + + # get the 3rd value: colors = number of colors + colors = str2nr(values[2]) + # get the 4th value: cpp = number of character per pixel + cpp = str2nr(values[3]) + + # these values must be positive, nonzero + if colors < 1 || cpp < 1 + return + endif + + # Highlight the Values string as normal string (no pixel string). + # Only when there is no slash, it would terminate the pattern. + if s !~ '/' + exe 'syn match xpmValues /' .. s .. '/' + endif + hi link xpmValues String + + n = 1 # n = color index + + elseif n <= colors # string is a color specification + + # get chars = <cpp> length string representing the pixels + # (first incl. the following whitespace) + chars = substitute(s, '"\(.\{' .. cpp .. '}\s\).*"', '\1', '') + + # now get color, first try 'c' key if any (color visual) + color = substitute(s, '".*\sc\s\+\(.\{-}\)\s*\(\(g4\=\|[ms]\)\s.*\)*\s*"', '\1', '') + if color == s + # no 'c' key, try 'g' key (grayscale with more than 4 levels) + color = substitute(s, '".*\sg\s\+\(.\{-}\)\s*\(\(g4\|[ms]\)\s.*\)*\s*"', '\1', '') + if color == s + # next try: 'g4' key (4-level grayscale) + color = substitute(s, '".*\sg4\s\+\(.\{-}\)\s*\([ms]\s.*\)*\s*"', '\1', '') + if color == s + # finally try 'm' key (mono visual) + color = substitute(s, '".*\sm\s\+\(.\{-}\)\s*\(s\s.*\)*\s*"', '\1', '') + if color == s + color = "" + endif + endif + endif + endif + + # MNV cannot handle RGB codes with more than 6 hex digits + if color =~ '#\x\{10,}$' + color = substitute(color, '\(\x\x\)\x\x', '\1', 'g') + elseif color =~ '#\x\{7,}$' + color = substitute(color, '\(\x\x\)\x', '\1', 'g') + # nor with 3 digits + elseif color =~ '#\x\{3}$' + color = substitute(color, '\(\x\)\(\x\)\(\x\)', '0\10\20\3', '') + endif + + # escape meta characters in patterns + s = escape(s, '/\*^$.~[]') + chars = escape(chars, '/\*^$.~[]') + + # now create syntax items + # highlight the color string as normal string (no pixel string) + exe 'syn match xpmCol' .. n .. 'Def /' .. s .. '/ contains=xpmCol' .. n .. 'inDef' + exe 'hi link xpmCol' .. n .. 'Def String' + + # but highlight the first whitespace after chars in its color + exe 'syn match xpmCol' .. n .. 'inDef /"' .. chars .. '/hs=s+' .. (cpp + 1) .. ' contained' + exe 'hi link xpmCol' .. n .. 'inDef xpmColor' .. n + + # remove the following whitespace from chars + chars = substitute(chars, '.$', '', '') + + # and create the syntax item contained in the pixel strings + exe 'syn match xpmColor' .. n .. ' /' .. chars .. '/ contained' + exe 'syn cluster xpmColors add=xpmColor' .. n + + # if no color or color = "None" show background + if color == "" || substitute(color, '.*', '\L&', '') == 'none' + exe 'hi xpmColor' .. n .. ' guifg=bg' + exe 'hi xpmColor' .. n .. ' guibg=NONE' + elseif color !~ "'" + exe 'hi xpmColor' .. n .. " guifg='" .. color .. "'" + exe 'hi xpmColor' .. n .. " guibg='" .. color .. "'" + endif + n += 1 + else + break # no more color string + endif + endif + endfor +enddef + +call s:CreateSyntax() + +endif " has("gui_running") || has("termguicolors") && &termguicolors + +" Define the default highlighting. +" Only when an item doesn't have highlighting yet + +hi def link xpmType Type +hi def link xpmStorageClass StorageClass +hi def link xpmTodo Todo +hi def link xpmComment Comment +hi def link xpmPixelString String + + +let b:current_syntax = "xpm" + +" mnv: ts=8:sw=3:noet: |