Adding configuration for new, tree-sitter based indentation logic in core

See this PR in atom/atom: FILL-ME-IN.

Once the other PR is merged, this one then fixes #594.

Author: chfritz

lib/main.js

@@ -61,6 +61,22 @@ exports.activate = function () {
       }
     })
   }
+
+  // This feels hacky. Better suggestions welcome.
+  const grammar = atom.grammars.grammarForId('source.js')
+  grammar.precedingRowConditions = (node) => (
+    (node.parent.type == 'while_statement' && node.type != 'statement_block')
+      || (node.parent.type == 'jsx_self_closing_element' && node.type != '/')
+      || (node.parent.type == 'if_statement'
+        && (!(node.type == 'if_statement'
+            && node.previousSibling.type == 'else'
+            && node.previousSibling.startPosition.row == node.startPosition.row)
+          /* not an else-if */
+        )
+        && node.type != 'statement_block'
+        && node.type != 'else')
+  )
+
 }
 
 const STYLED_REGEX = /\bstyled\b/i

settings/language-javascript.cson

@@ -11,3 +11,27 @@
     'decreaseIndentPattern': '(?x)
         ^ \\s* (\\s* /[*] .* [*]/ \\s*)* [}\\])]
       '
+    scopes:
+      indent:
+        array: true
+        object: true
+        arguments: true
+        statement_block: true
+        class_body: true
+        parenthesized_expression: true
+        jsx_element: true
+        jsx_opening_element: true
+        jsx_expression: true
+        switch_body: true
+        comment: true
+      indentExceptFirst:
+        member_expression: true
+        assignment_expression: true
+        expression_statement: true
+        variable_declarator: true
+        lexical_declaration: true
+        binary_expression: true
+      types:
+        indent: {}
+        outdent:
+          access_specifier: true