1 files changed, 119 insertions, 0 deletions
diff --git a/runtime/indent/odin.vim b/runtime/indent/odin.vim
new file mode 100644
index 0000000..e3318c4
--- /dev/null
+++ b/runtime/indent/odin.vim
@@ -0,0 +1,119 @@
+vim9script
+
+# Vim indent plugin file
+# Language: Odin
+# Maintainer: Maxim Kim <habamax@gmail.com>
+# Website: https://github.com/habamax/vim-odin
+# Last Change: 2024-01-15
+
+if exists("b:did_indent")
+    finish
+endif
+b:did_indent = 1
+
+b:undo_indent = 'setlocal cindent< cinoptions< cinkeys< indentexpr<'
+
+setlocal cindent
+setlocal cinoptions=L0,m1,(s,j1,J1,l1,+0,:0,#1
+setlocal cinkeys=0{,0},0),0],!^F,:,o,O
+
+setlocal indentexpr=GetOdinIndent(v:lnum)
+
+def PrevLine(lnum: number): number
+    var plnum = lnum - 1
+    var pline: string
+    while plnum > 1
+        plnum = prevnonblank(plnum)
+        pline = getline(plnum)
+        # XXX: take into account nested multiline /* /* */ */ comments
+        if pline =~ '\*/\s*$'
+            while getline(plnum) !~ '/\*' && plnum > 1
+                plnum -= 1
+            endwhile
+            if getline(plnum) =~ '^\s*/\*'
+                plnum -= 1
+            else
+                break
+            endif
+        elseif pline =~ '^\s*//'
+            plnum -= 1
+        else
+            break
+        endif
+    endwhile
+    return plnum
+enddef
+
+def GetOdinIndent(lnum: number): number
+    var plnum = PrevLine(lnum)
+    var pline = getline(plnum)
+    var pindent = indent(plnum)
+    # workaround of cindent "hang"
+    # if the previous line looks like:
+    # : #{}
+    # : #whatever{whateverelse}
+    # and variations where : # { } are in the string
+    # cindent(lnum) hangs
+    if pline =~ ':\s\+#.*{.*}'
+        return pindent
+    endif
+
+    var indent = cindent(lnum)
+    var line = getline(lnum)
+
+    if line =~ '^\s*#\k\+'
+        if pline =~ '[{:]\s*$'
+            indent = pindent + shiftwidth()
+        else
+            indent = pindent
+        endif
+    elseif pline =~ 'switch\s.*{\s*$'
+        indent = pindent
+    elseif pline =~ 'case\s*.*,\s*\(//.*\)\?$' # https://github.com/habamax/vim-odin/issues/8
+        indent = pindent + matchstr(pline, 'case\s*')->strcharlen()
+    elseif line =~ '^\s*case\s\+.*,\s*$'
+        indent = pindent - shiftwidth()
+    elseif pline =~ 'case\s*.*:\s*\(//.*\)\?$'
+        if line !~ '^\s*}\s*$' && line !~ '^\s*case[[:space:]:]'
+            indent = pindent + shiftwidth()
+        endif
+    elseif pline =~ '^\s*@.*' && line !~ '^\s*}'
+        indent = pindent
+    elseif pline =~ ':[:=].*}\s*$'
+        indent = pindent
+    elseif pline =~ '^\s*}\s*$'
+        if line !~ '^\s*}' && line !~ 'case\s*.*:\s*$'
+            indent = pindent
+        else
+            indent = pindent - shiftwidth()
+        endif
+    elseif pline =~ '\S:\s*$'
+        # looking up for a case something,
+        #                       whatever,
+        #                       anything:
+        # ... 20 lines before
+        for idx in range(plnum - 1, plnum - 21, -1)
+            if plnum < 1
+                break
+            endif
+            if getline(idx) =~ '^\s*case\s.*,\s*$'
+                indent = indent(idx) + shiftwidth()
+                break
+            endif
+        endfor
+    elseif pline =~ '{[^{]*}\s*$' && line !~ '^\s*[})]\s*$' # https://github.com/habamax/vim-odin/issues/2
+        indent = pindent
+    elseif pline =~ '^\s*}\s*$' # https://github.com/habamax/vim-odin/issues/3
+        # Find line with opening { and check if there is a label:
+        # If there is, return indent of the closing }
+        cursor(plnum, 1)
+        silent normal! %
+        var brlnum = line('.')
+        var brline = getline('.')
+        if plnum != brlnum && (brline =~ '^\s*\k\+:\s\+for' || brline =~ '^\s*\k\+\s*:=')
+            indent = pindent
+        endif
+    endif
+
+    return indent
+enddef