feature: @putout/printer: ArrayExpression: maxElementsInOneLine

README.md

@@ -158,10 +158,7 @@ if(a>3)console.log('ok');else console.log('not ok');
 
 Options used to configure logic of output, similar to ESLint rules:
 
-```js
-
-
-```
+- `maxElementsInOneLine` - count of `ArrayExpression` and `ArrayPattern` elements placed in one line.
 
 ### `write`
 

lib/tokenize/expressions/array-expression/array-expression.js

@@ -23,8 +23,6 @@ const {
     isStringAndMember,
 } = require('../../is');
 
-const MAX_ARRAY_ELEMENTS_WHEN_USED_AS_ARGUMENT = 4;
-
 const isForOf = ({parentPath}) => parentPath.isForOfStatement();
 
 const isInsideOneElementArray = ({parentPath}) => parentPath.node.elements.length === 1;
@@ -112,7 +110,8 @@ module.exports.ArrayExpression = {
     before(path, {print}) {
         print.breakline();
     },
-    print(path, {print, maybe, indent}) {
+    print(path, {print, maybe, indent}, semantics) {
+        const {maxElementsInOneLine} = semantics;
         const elements = path.get('elements');
         const shouldIncreaseIndent = !isIncreaseIndent(path);
 
@@ -123,6 +122,7 @@ module.exports.ArrayExpression = {
 
         const isNewLine = isNewlineBetweenElements(path, {
             elements,
+            maxElementsInOneLine,
         });
 
         const n = elements.length - 1;
@@ -256,7 +256,7 @@ function isOneSimple(path) {
     return first.isMemberExpression();
 }
 
-function isNewlineBetweenElements(path, {elements}) {
+function isNewlineBetweenElements(path, {elements, maxElementsInOneLine}) {
     if (elements.length > 3 && !isObjectExpression(elements[0]))
         return true;
 
@@ -287,7 +287,7 @@ function isNewlineBetweenElements(path, {elements}) {
     if (isSimpleAndCall(elements))
         return false;
 
-    if (isShortTwoSimplesInsideCall(path, MAX_ARRAY_ELEMENTS_WHEN_USED_AS_ARGUMENT))
+    if (isShortTwoSimplesInsideCall(path, maxElementsInOneLine))
         return false;
 
     if (isTwoStringsDifferentLength(elements))

lib/tokenize/expressions/array-expression/array-expression.spec.js

@@ -95,3 +95,16 @@ test('printer: tokenizer: statement: ArrayExpression: space', (t) => {
     t.equal(result, fixture.arrayExpressionSpaceFix);
     t.end();
 });
+
+test('printer: tokenizer: statement: ArrayExpression: maxElementsInOneLine', (t) => {
+    const ast = parse(fixture.arrayExpressionMaxElementsInOneLine);
+
+    const result = print(ast, {
+        semantics: {
+            maxElementsInOneLine: 1,
+        },
+    });
+
+    t.equal(result, fixture.arrayExpressionMaxElementsInOneLineFix);
+    t.end();
+});

lib/tokenize/expressions/array-expression/fixture/array-expression-max-elements-in-one-line-fix.js

@@ -0,0 +1,4 @@
+fn([
+    'hello',
+    'world',
+]);

lib/tokenize/expressions/array-expression/fixture/array-expression-max-elements-in-one-line.js

@@ -0,0 +1 @@
+fn(['hello', 'world'])