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+# http://graphql.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*[.](graphqls?) %{
+    set-option buffer filetype graphql
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=graphql %{
+    require-module graphql
+
+    hook window ModeChange pop:insert:.* -group graphql-trim-indent graphql-trim-indent
+    hook window InsertChar .* -group graphql-indent graphql-indent-on-char
+    hook window InsertChar \n -group graphql-indent graphql-indent-on-new-line
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window graphql-.+ }
+}
+
+hook -group graphql-highlight global WinSetOption filetype=graphql %{
+    add-highlighter window/graphql ref graphql
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/graphql }
+}
+
+
+provide-module graphql %§ 
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/graphql regions
+add-highlighter shared/graphql/code default-region group
+add-highlighter shared/graphql/line-description region '#' '\n' fill comment
+add-highlighter shared/graphql/block-description region '"""' '"""' fill comment
+add-highlighter shared/graphql/description region '"' '"\s*\n' fill comment
+add-highlighter shared/graphql/object region -recurse \{ [{] [}] regions
+
+# Objects
+add-highlighter shared/graphql/object/line-description region '#' '\n' fill comment
+add-highlighter shared/graphql/object/block-description region '"""' '"""' fill comment
+add-highlighter shared/graphql/object/field default-region group
+add-highlighter shared/graphql/object/field/ regex ([A-Za-z][A-Za-z0-9_-]*)(?:\([^)]*\))?\h*[:{] 1:attribute
+add-highlighter shared/graphql/object/field/ regex ^\h*([A-Za-z][A-Za-z0-9_-]*)\h*$ 1:attribute
+
+# Values
+add-highlighter shared/graphql/object/field/values regex \b(true|false|null|\d+(?:\.\d+)?(?:[eE][+-]?\d*)?)\b 0:value
+add-highlighter shared/graphql/object/field/variables regex \$[a-zA-Z0-9]+\b 0:variable
+# add-highlighter shared/graphql/object/field/string regex '"([^"]|\\")*"' 0:string
+add-highlighter shared/graphql/object/field/string regex '"(?:[^"\\]|\\.)*"' 0:string
+
+# Meta
+add-highlighter shared/graphql/object/field/directives regex @(?:include|skip) 0:meta
+
+# Attributes
+add-highlighter shared/graphql/object/field/required regex '(?<=[\w\]])(?<bang>!)' bang:operator
+add-highlighter shared/graphql/object/field/assignment regex '=' 0:operator
+
+# Keywords
+add-highlighter shared/graphql/code/top-level regex '\bschema\b' 0:keyword
+add-highlighter shared/graphql/code/keywords regex '\b(?<name>enum|fragment|input|implements|interface|mutation|on|query|scalar|subscription|type|union)\h+(?:[A-Za-z]\w*)' name:keyword
+
+# Types
+add-highlighter shared/graphql/object/field/scalars regex \b(Boolean|Float|ID|Int|String)\b 0:type
+
+# Operators
+add-highlighter shared/graphql/object/field/expand-fragment regex '\.\.\.(?=\w)' 0:operator
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden graphql-trim-indent %{
+    # remove trailing white spaces
+    try %{ execute-keys -draft -itersel x s \h+$ <ret> d }
+}
+
+define-command -hidden graphql-indent-on-char %<
+    evaluate-commands -draft -itersel %<
+        # align closer token to its opener when alone on a line
+        try %< execute-keys -draft <a-h> <a-k> ^\h+[\]}]$ <ret> m <a-S> 1<a-&> >
+    >
+>
+
+define-command -hidden graphql-indent-on-new-line %<
+    evaluate-commands -draft -itersel %<
+        # preserve previous line indent
+        try %{ execute-keys -draft <semicolon> K <a-&> }
+        # filter previous line
+        try %{ execute-keys -draft k : graphql-trim-indent <ret> }
+        # indent after lines ending with opener token
+        try %< execute-keys -draft k x <a-k> [[{]\h*$ <ret> j <a-gt> >
+        # deindent closer token(s) when after cursor
+        try %< execute-keys -draft x <a-k> ^\h*[}\]] <ret> gh / [}\]] <ret> m <a-S> 1<a-&> >
+    >
+>
+
+§