[ui] create TextCompletionComboBox with spinner

GitOrigin-RevId: c097ec1298defb0bc300bb220c5049c4b0a843e6

platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/ui/completion/TextCompletionComboBox.kt

@@ -14,7 +14,7 @@ import com.intellij.ui.*
 import java.awt.event.KeyEvent
 import javax.swing.KeyStroke
 
-class TextCompletionComboBox<T>(
+open class TextCompletionComboBox<T>(
   project: Project?,
   private val converter: TextCompletionComboBoxConverter<T>
 ) : TextCompletionField<T>(project) {

platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/ui/completion/TextCompletionComboBoxWithSpinner.kt

@@ -0,0 +1,31 @@
+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.openapi.externalSystem.service.ui.completion
+
+import com.intellij.openapi.project.Project
+import com.intellij.ui.AnimatedIcon
+import com.intellij.ui.SpinningProgressIcon
+import com.intellij.ui.components.fields.ExtendableTextComponent
+
+class TextCompletionComboBoxWithSpinner<T>(project: Project?, converter: TextCompletionComboBoxConverter<T>) : TextCompletionComboBox<T>(
+  project, converter) {
+
+  private val spinner = SpinningProgressIcon()
+  private val myExtension: ExtendableTextComponent.Extension
+
+  var spinning: Boolean = false
+    set(value) {
+      if (value) {
+        addExtension(myExtension)
+      }
+      else {
+        removeExtension(myExtension)
+      }
+    }
+    get() = field
+
+  init {
+    this.putClientProperty(AnimatedIcon.ANIMATION_IN_RENDERER_ALLOWED, true)
+    myExtension = ExtendableTextComponent.Extension.create(spinner, spinner, null, { })
+
+  }
+}