Fix false positive when argument list is after multiline dot-qualified expression

CHANGELOG.md

@@ -12,6 +12,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Fix "filename" rule will not work when '.editorconfig' file is not found ([#997](https://github.com/pinterest/ktlint/issues/1004))
 - EditorConfig generation for `import-ordering` ([#1011](https://github.com/pinterest/ktlint/pull/1011))
 - Internal error (`no-unused-imports`) ([#996](https://github.com/pinterest/ktlint/issues/996))
+- Fix false positive when argument list is after multiline dot-qualified expression (`argument-list-wrapping`) ([#893](https://github.com/pinterest/ktlint/issues/893))
 
 ### Changed
 - Update Gradle shadow plugin to `6.1.0` version

ktlint-ruleset-experimental/src/main/kotlin/com/pinterest/ktlint/ruleset/experimental/ArgumentListWrappingRule.kt

@@ -3,8 +3,11 @@ package com.pinterest.ktlint.ruleset.experimental
 import com.pinterest.ktlint.core.KtLint
 import com.pinterest.ktlint.core.Rule
 import com.pinterest.ktlint.core.ast.ElementType
+import com.pinterest.ktlint.core.ast.ElementType.DOT_QUALIFIED_EXPRESSION
+import com.pinterest.ktlint.core.ast.ElementType.TYPE_ARGUMENT_LIST
 import com.pinterest.ktlint.core.ast.children
 import com.pinterest.ktlint.core.ast.column
+import com.pinterest.ktlint.core.ast.isPartOf
 import com.pinterest.ktlint.core.ast.isPartOfComment
 import com.pinterest.ktlint.core.ast.isRoot
 import com.pinterest.ktlint.core.ast.isWhiteSpace
@@ -71,21 +74,38 @@ class ArgumentListWrappingRule : Rule("argument-list-wrapping") {
                     // max_line_length exceeded
                     maxLineLength > -1 && (node.column - 1 + node.textLength) > maxLineLength && !node.textContains('\n')
             if (putArgumentsOnSeparateLines) {
-                // IDEA quirk:
-                // generic<
-                //     T,
-                //     R>(
-                //     1,
-                //     2
-                // )
-                // instead of
-                // generic<
-                //     T,
-                //     R>(
-                //         1,
-                //         2
-                //     )
-                val adjustedIndent = if (node.hasTypeParameterListInFront()) indentSize else 0
+                val prevWhitespaceWithNewline = node.prevLeaf { it.isWhiteSpaceWithNewline() }
+                val adjustedIndent = when {
+                    // IDEA quirk:
+                    // generic<
+                    //     T,
+                    //     R>(
+                    //     1,
+                    //     2
+                    // )
+                    // instead of
+                    // generic<
+                    //     T,
+                    //     R>(
+                    //         1,
+                    //         2
+                    //     )
+                    prevWhitespaceWithNewline?.isPartOf(TYPE_ARGUMENT_LIST) == true -> indentSize
+                    // IDEA quirk:
+                    // foo
+                    //     .bar(
+                    //     1,
+                    //     2
+                    // )
+                    // instead of
+                    // foo
+                    //     .bar(
+                    //         1,
+                    //         2
+                    //     )
+                    prevWhitespaceWithNewline?.isPartOf(DOT_QUALIFIED_EXPRESSION) == true -> indentSize
+                    else -> 0
+                }
 
                 // aiming for
                 // ... LPAR
@@ -199,12 +219,6 @@ class ArgumentListWrappingRule : Rule("argument-list-wrapping") {
         }
     }
 
-    private fun ASTNode.hasTypeParameterListInFront(): Boolean =
-        treeParent.children()
-            .firstOrNull { it.elementType == ElementType.TYPE_PARAMETER_LIST }
-            ?.children()
-            ?.any { it.isWhiteSpaceWithNewline() } == true
-
     private fun ASTNode.prevWhiteSpaceWithNewLine(): ASTNode? {
         var prev = prevLeaf()
         while (prev != null && (prev.isWhiteSpace() || prev.isPartOfComment())) {

ktlint-ruleset-experimental/src/test/kotlin/com/pinterest/ktlint/ruleset/experimental/ArgumentListWrappingRuleTest.kt

@@ -528,4 +528,47 @@ class ArgumentListWrappingRuleTest {
             )
         ).isEmpty()
     }
+
+    @Test
+    fun `lint argument list after multiline dot qualified expression`() {
+        assertThat(
+            ArgumentListWrappingRule().lint(
+                """
+                class Logging(mode: Any, appInstanceIdentity: String, org: String)
+
+                class StateManager {
+                    var firebaseLogger: Logging? = null
+                }
+
+                private fun replaceLogger(deviceId: String, orgName: String) {
+                    val stateManager: StateManager = StateManager()
+                    stateManager
+                        .firebaseLogger(
+                        mode = 0,
+                        appInstanceIdentity = deviceId,
+                        org = orgName
+                    )
+                }
+                """.trimIndent()
+            )
+        ).isEmpty()
+    }
+
+    @Test
+    fun `lint argument list after multiline type argument list`() {
+        assertThat(
+            ArgumentListWrappingRule().lint(
+                """
+                fun test() {
+                    generic<
+                        Int,
+                        Int>(
+                        1,
+                        2
+                    )
+                }
+                """.trimIndent()
+            )
+        ).isEmpty()
+    }
 }