1 files changed, 154 insertions, 0 deletions
diff --git a/runtime/indent/gdscript.vim b/runtime/indent/gdscript.vim
new file mode 100644
index 0000000000..bbb4f284f1
--- /dev/null
+++ b/runtime/indent/gdscript.vim
@@ -0,0 +1,154 @@
+" Vim indent file
+" Language: gdscript (Godot game engine)
+" Maintainer: Maxim Kim <habamax@gmail.com>
+" Based on python indent file.
+"
+" This file has been manually translated from Vim9 script.
+
+if exists("b:did_indent")
+    finish
+endif
+let b:did_indent = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+let s:undo_opts = "setl indentexpr< indentkeys< lisp< autoindent<"
+
+if exists('b:undo_indent')
+    let b:undo_indent ..= "|" .. s:undo_opts
+else
+    let b:undo_indent = s:undo_opts
+endif
+
+setlocal nolisp
+setlocal autoindent
+setlocal indentexpr=s:GDScriptIndent()
+setlocal indentkeys+=<:>,=elif,=except
+
+
+function s:GDScriptIndent() abort
+    " If this line is explicitly joined: If the previous line was also joined,
+    " line it up with that one, otherwise add two 'shiftwidth'
+    if getline(v:lnum - 1) =~# '\\$'
+        if v:lnum > 1 && getline(v:lnum - 2) =~# '\\$'
+            return indent(v:lnum - 1)
+        endif
+        return indent(v:lnum - 1) + (shiftwidth() * 2)
+    endif
+
+    " If the start of the line is in a string don't change the indent.
+    if has('syntax_items') && synIDattr(synID(v:lnum, 1, 1), "name") =~# "String$"
+        return -1
+    endif
+
+    " Search backwards for the previous non-empty line.
+    let plnum = prevnonblank(v:lnum - 1)
+
+    if plnum == 0
+        " This is the first non-empty line, use zero indent.
+        return 0
+    endif
+
+    let plindent = indent(plnum)
+    let plnumstart = plnum
+
+    " Get the line and remove a trailing comment.
+    " Use syntax highlighting attributes when possible.
+    let pline = getline(plnum)
+    let pline_len = strlen(pline)
+    if has('syntax_items')
+        " If the last character in the line is a comment, do a binary search for
+        " the start of the comment.  synID() is slow, a linear search would take
+        " too long on a long line.
+        if synIDattr(synID(plnum, pline_len, 1), "name") =~# "\\(Comment\\|Todo\\)$"
+            let min = 1
+            let max = pline_len
+            while min < max
+                let col = (min + max) / 2
+                if synIDattr(synID(plnum, col, 1), "name") =~# "\\(Comment\\|Todo\\)$"
+                    let max = col
+                else
+                    let min = col + 1
+                endif
+            endwhile
+            let pline = strpart(pline, 0, min - 1)
+        endif
+    else
+        let col = 0
+        while col < pline_len
+            if pline[col] ==# '#'
+                let pline = strpart(pline, 0, col)
+                break
+            endif
+            let col = col + 1
+        endwhile
+    endif
+
+
+    " When "inside" parenthesis: If at the first line below the parenthesis add
+    " one 'shiftwidth' ("inside" is simplified and not really checked)
+    " my_var = (
+    "     a
+    "     + b
+    "     + c
+    " )
+    if pline =~# '[({\[]\s*$'
+        return indent(plnum) + shiftwidth()
+    endif
+
+
+    " If the previous line ended with a colon, indent this line
+    if pline =~# ':\s*$'
+        return plindent + shiftwidth()
+    endif
+
+    " If the previous line was a stop-execution statement...
+    if getline(plnum) =~# '^\s*\(break\|continue\|raise\|return\|pass\)\>'
+        " See if the user has already dedented
+        if indent(v:lnum) > indent(plnum) - shiftwidth()
+            " If not, recommend one dedent
+            return indent(plnum) - shiftwidth()
+        endif
+        " Otherwise, trust the user
+        return -1
+    endif
+
+    " If the current line begins with a keyword that lines up with "try"
+    if getline(v:lnum) =~# '^\s*\(except\|finally\)\>'
+        let lnum = v:lnum - 1
+        while lnum >= 1
+            if getline(lnum) =~# '^\s*\(try\|except\)\>'
+                let ind = indent(lnum)
+                if ind >= indent(v:lnum)
+                    return -1   " indent is already less than this
+                endif
+                return ind      " line up with previous try or except
+            endif
+            let lnum = lnum - 1
+        endwhile
+        return -1               " no matching "try"!
+    endif
+
+
+    " If the current line begins with a header keyword, dedent
+    if getline(v:lnum) =~# '^\s*\(elif\|else\)\>'
+
+        " Unless the previous line was a one-liner
+        if getline(plnumstart) =~# '^\s*\(for\|if\|try\)\>'
+            return plindent
+        endif
+
+        " Or the user has already dedented
+        if indent(v:lnum) <= plindent - shiftwidth()
+            return -1
+        endif
+
+        return plindent - shiftwidth()
+    endif
+
+    return -1
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo