🐛Fix: incorrect indentation in vue/script-indent rule (#503)

* Fixed an issue where the rules `vue/script-indent` unexpected error report whileforce using semicolon.

* remove unrelated comment

* fixed parse error

Author: ota-meshi

Diff for: lib/utils/indent-common.js

@@ -18,7 +18,6 @@ const KNOWN_NODES = new Set(['ArrayExpression', 'ArrayPattern', 'ArrowFunctionEx
 const LT_CHAR = /[\r\n\u2028\u2029]/
 const LINES = /[^\r\n\u2028\u2029]+(?:$|\r\n|[\r\n\u2028\u2029])/g
 const BLOCK_COMMENT_PREFIX = /^\s*\*/
-const TRIVIAL_PUNCTUATOR = /^[(){}[\],;]$/
 
 /**
  * Normalize options.
@@ -245,21 +244,6 @@ function isClosingToken (token) {
   )
 }
 
-/**
- * Check whether a given token is trivial or not.
- * @param {Token} token The token to check.
- * @returns {boolean} `true` if the token is trivial.
- */
-function isTrivialToken (token) {
-  return token != null && (
-    (token.type === 'Punctuator' && TRIVIAL_PUNCTUATOR.test(token.value)) ||
-    token.type === 'HTMLTagOpen' ||
-    token.type === 'HTMLEndTagOpen' ||
-    token.type === 'HTMLTagClose' ||
-    token.type === 'HTMLSelfClosingTagClose'
-  )
-}
-
 /**
  * Creates AST event handlers for html-indent.
  *
@@ -564,33 +548,37 @@ module.exports.defineVisitor = function create (context, tokenStore, defaultOpti
   /**
    * Calculate correct indentation of the line of the given tokens.
    * @param {Token[]} tokens Tokens which are on the same line.
-   * @returns {number} Correct indentation. If it failed to calculate then `Number.MAX_SAFE_INTEGER`.
+   * @returns {object|null} Correct indentation. If it failed to calculate then `null`.
    */
-  function getExpectedIndent (tokens) {
-    const trivial = isTrivialToken(tokens[0])
-    let expectedIndent = Number.MAX_SAFE_INTEGER
+  function getExpectedIndents (tokens) {
+    const expectedIndents = []
 
     for (let i = 0; i < tokens.length; ++i) {
       const token = tokens[i]
       const offsetInfo = offsets.get(token)
 
-      // If the first token is not trivial then ignore trivial following tokens.
-      if (offsetInfo != null && (trivial || !isTrivialToken(token))) {
+      if (offsetInfo != null) {
         if (offsetInfo.expectedIndent != null) {
-          expectedIndent = Math.min(expectedIndent, offsetInfo.expectedIndent)
+          expectedIndents.push(offsetInfo.expectedIndent)
         } else {
           const baseOffsetInfo = offsets.get(offsetInfo.baseToken)
           if (baseOffsetInfo != null && baseOffsetInfo.expectedIndent != null && (i === 0 || !baseOffsetInfo.baseline)) {
-            expectedIndent = Math.min(expectedIndent, baseOffsetInfo.expectedIndent + offsetInfo.offset * options.indentSize)
+            expectedIndents.push(baseOffsetInfo.expectedIndent + offsetInfo.offset * options.indentSize)
             if (baseOffsetInfo.baseline) {
               break
             }
           }
         }
       }
     }
+    if (!expectedIndents.length) {
+      return null
+    }
 
-    return expectedIndent
+    return {
+      expectedIndent: expectedIndents[0],
+      expectedBaseIndent: expectedIndents.reduce((a, b) => Math.min(a, b))
+    }
   }
 
   /**
@@ -746,11 +734,14 @@ module.exports.defineVisitor = function create (context, tokenStore, defaultOpti
     // Calculate and save expected indentation.
     const firstToken = tokens[0]
     const actualIndent = firstToken.loc.start.column
-    const expectedIndent = getExpectedIndent(tokens)
-    if (expectedIndent === Number.MAX_SAFE_INTEGER) {
+    const expectedIndents = getExpectedIndents(tokens)
+    if (!expectedIndents) {
       return
     }
 
+    const expectedBaseIndent = expectedIndents.expectedBaseIndent
+    const expectedIndent = expectedIndents.expectedIndent
+
     // Debug log
     // console.log('line', firstToken.loc.start.line, '=', { actualIndent, expectedIndent }, 'from:')
     // for (const token of tokens) {
@@ -773,11 +764,11 @@ module.exports.defineVisitor = function create (context, tokenStore, defaultOpti
         if (offsetInfo.baseline) {
           // This is a baseline token, so the expected indent is the column of this token.
           if (options.indentChar === ' ') {
-            offsetInfo.expectedIndent = Math.max(0, token.loc.start.column + expectedIndent - actualIndent)
+            offsetInfo.expectedIndent = Math.max(0, token.loc.start.column + expectedBaseIndent - actualIndent)
           } else {
             // In hard-tabs mode, it cannot align tokens strictly, so use one additional offset.
             // But the additional offset isn't needed if it's at the beginning of the line.
-            offsetInfo.expectedIndent = expectedIndent + (token === tokens[0] ? 0 : 1)
+            offsetInfo.expectedIndent = expectedBaseIndent + (token === tokens[0] ? 0 : 1)
           }
           baseline.add(token)
         } else if (baseline.has(offsetInfo.baseToken)) {
@@ -786,7 +777,7 @@ module.exports.defineVisitor = function create (context, tokenStore, defaultOpti
           baseline.add(token)
         } else {
           // Otherwise, set the expected indent of this line.
-          offsetInfo.expectedIndent = expectedIndent
+          offsetInfo.expectedIndent = expectedBaseIndent
         }
       }
     }

Diff for: tests/fixtures/script-indent/array-expression-03.vue

@@ -0,0 +1,6 @@
+<!--{}-->
+<script>
+var v = [() =>
+           1
+         ,b]
+</script>

Diff for: tests/fixtures/script-indent/array-expression-04.vue

@@ -0,0 +1,6 @@
+<!--{}-->
+<script>
+var v = [() =>
+  1
+,]
+</script>