" Vim syntax file
" Language:     prr
" Maintainer:   Daniel Xu <dxu@dxuuu.xyz>
" Last Change:  2022 Mar 25
" Credits:      Bram Moolenaar <Bram@vim.org>
"
"               This version is copied and edited from diff.vim

" Check whether an earlier file has defined a syntax already
if exists("b:current_syntax")
  finish
endif

syn region prrFile start=/^> diff/ end=/^> diff/ms=s-1,me=s-1 transparent fold keepend contains=prrHeader,prrIndex,prrChunk

syn region prrChunk start=/^> @@/ start=/^\n> /rs=e-2 end=/^> @@/ms=s-1,me=s-1 end=/^> diff/ms=s-1,me=s-1 end=/^$/ transparent fold keepend contains=CONTAINED,prrTag

syn match prrAdded   contained "^> +.*"
syn match prrRemoved contained "^> -.*"

syn match prrHeader contained "^> diff.*"
syn match prrIndex contained "^> index.*"
syn match prrChunkH contained "^> @@.*"

syn match prrTag "^@.*" contains=prrTagName,prrResult transparent

syn match prrTagName contained "@prr" nextgroup=prrResult
syn keyword prrResult contained approve reject comment

" Define the default highlighting.
" Only used when an item doesn't have highlighting yet
hi def link prrAdded           Identifier
hi def link prrRemoved         Special

hi def link prrTagName Keyword
hi def link prrResult String
hi def link prrHeader Include
hi def link prrIndex Comment
hi def link prrChunkH Function

let b:current_syntax = "prr"