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-rw-r--r--runtime/indent/fish.vim82
1 files changed, 82 insertions, 0 deletions
diff --git a/runtime/indent/fish.vim b/runtime/indent/fish.vim
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index 0000000..7455287
--- /dev/null
+++ b/runtime/indent/fish.vim
@@ -0,0 +1,82 @@
+" Vim indent file
+" Language: fish
+" Maintainer: Nicholas Boyle (github.com/nickeb96)
+" Repository: https://github.com/nickeb96/fish.vim
+" Last Change: February 4, 2023
+
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetFishIndent(v:lnum)
+setlocal indentkeys+==end,=else,=case
+
+function s:PrevCmdStart(linenum)
+ let l:linenum = a:linenum
+ " look for the first line that isn't a line continuation
+ while l:linenum > 1 && getline(l:linenum - 1) =~# '\\$'
+ let l:linenum = l:linenum - 1
+ endwhile
+ return l:linenum
+endfunction
+
+function GetFishIndent(lnum)
+ let l:shiftwidth = shiftwidth()
+
+ let l:prevlnum = prevnonblank(a:lnum - 1)
+ if l:prevlnum ==# 0
+ return 0
+ endif
+
+ " if the previous line ended with a line continuation
+ if getline(a:lnum - 1) =~# '\\$'
+ if a:lnum ==# 0 || getline(a:lnum - 2) !~# '\\$'
+ " this is the first line continuation in a chain, so indent it
+ return indent(a:lnum - 1) + l:shiftwidth
+ else
+ " use the same indentation as the previous continued line
+ return indent(a:lnum - 1)
+ endif
+ endif
+
+ let l:prevlnum = s:PrevCmdStart(l:prevlnum)
+
+ let l:prevline = getline(l:prevlnum)
+ if l:prevline =~# '^\s*\(begin\|if\|else\|while\|for\|function\|case\|switch\)\>'
+ let l:indent = l:shiftwidth
+ else
+ let l:indent = 0
+ endif
+
+ let l:line = getline(a:lnum)
+ if l:line =~# '^\s*end\>'
+ " find end's matching start
+ let l:depth = 1
+ let l:currentlnum = a:lnum
+ while l:depth > 0 && l:currentlnum > 0
+ let l:currentlnum = s:PrevCmdStart(prevnonblank(l:currentlnum - 1))
+ let l:currentline = getline(l:currentlnum)
+ if l:currentline =~# '^\s*end\>'
+ let l:depth = l:depth + 1
+ elseif l:currentline =~# '^\s*\(begin\|if\|while\|for\|function\|switch\)\>'
+ let l:depth = l:depth - 1
+ endif
+ endwhile
+ if l:currentline =~# '^\s*switch\>'
+ return indent(l:currentlnum)
+ else
+ return indent(l:prevlnum) + l:indent - l:shiftwidth
+ endif
+ elseif l:line =~# '^\s*else\>'
+ return indent(l:prevlnum) + l:indent - l:shiftwidth
+ elseif l:line =~# '^\s*case\>'
+ if getline(l:prevlnum) =~# '^\s*switch\>'
+ return indent(l:prevlnum) + l:indent
+ else
+ return indent(l:prevlnum) + l:indent - l:shiftwidth
+ endif
+ else
+ return indent(l:prevlnum) + l:indent
+ endif
+endfunction