get rid of Kotlin specific "Show expression type" action

#KT-13142 Fixed

idea/src/META-INF/plugin.xml

@@ -58,17 +58,6 @@
       <add-to-group group-id="NewGroup" anchor="after" relative-to-action="NewGroup1"/>
     </action>
 
-    <action id="ShowKotlinExpressionType" class="org.jetbrains.kotlin.idea.actions.ShowExpressionTypeAction"
-            text="Show Expression Type">
-      <keyboard-shortcut keymap="$default" first-keystroke="alt EQUALS"/>
-
-      <keyboard-shortcut keymap="Mac OS X" first-keystroke="control shift P"/>
-      <keyboard-shortcut keymap="Mac OS X" first-keystroke="alt EQUALS" remove="true"/>
-
-      <keyboard-shortcut keymap="Mac OS X 10.5+" first-keystroke="control shift P"/>
-      <keyboard-shortcut keymap="Mac OS X 10.5+" first-keystroke="alt EQUALS" remove="true"/>
-      <add-to-group group-id="CodeEditorViewGroup" anchor="last"/>
-    </action>
     <action id="ConvertJavaToKotlin" class="org.jetbrains.kotlin.idea.actions.JavaToKotlinAction"
             text="Convert Java File to Kotlin File">
       <keyboard-shortcut keymap="$default" first-keystroke="control alt shift K"/>

idea/src/org/jetbrains/kotlin/idea/actions/ShowExpressionTypeAction.kt

@@ -1,98 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.idea.actions
-
-import com.intellij.codeInsight.CodeInsightUtilCore
-import com.intellij.codeInsight.hint.HintManager
-import com.intellij.openapi.actionSystem.ActionManager
-import com.intellij.openapi.actionSystem.AnAction
-import com.intellij.openapi.actionSystem.AnActionEvent
-import com.intellij.openapi.actionSystem.CommonDataKeys
-import com.intellij.openapi.editor.Editor
-import com.intellij.psi.PsiFile
-import org.jetbrains.kotlin.descriptors.CallableDescriptor
-import org.jetbrains.kotlin.idea.KotlinLanguage
-import org.jetbrains.kotlin.idea.caches.resolve.analyze
-import org.jetbrains.kotlin.psi.KtCallableDeclaration
-import org.jetbrains.kotlin.psi.KtExpression
-import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.psi.psiUtil.endOffset
-import org.jetbrains.kotlin.psi.psiUtil.parents
-import org.jetbrains.kotlin.psi.psiUtil.startOffset
-import org.jetbrains.kotlin.renderer.DescriptorRenderer
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.calls.callUtil.getType
-import org.jetbrains.kotlin.types.KotlinType
-
-@Deprecated("Remove once we no longer support IDEA 14.1") class ShowExpressionTypeAction : AnAction() {
-    override fun actionPerformed(e: AnActionEvent) {
-        val editor = e.getData(CommonDataKeys.EDITOR) ?: return
-        val psiFile = e.getData(CommonDataKeys.PSI_FILE) as? KtFile ?: return
-
-        val type = if (editor.selectionModel.hasSelection()) {
-            val startOffset = editor.selectionModel.selectionStart
-            val endOffset = editor.selectionModel.selectionEnd
-            val expression = CodeInsightUtilCore.findElementInRange<KtExpression>(psiFile, startOffset, endOffset, KtExpression::class.java, KotlinLanguage.INSTANCE) ?: return
-            typeByExpression(expression)
-        }
-        else {
-            val offset = editor.caretModel.offset
-            val token = psiFile.findElementAt(offset) ?: return
-            val pair = token.parents
-                               .filterIsInstance<KtExpression>()
-                               .map { it to typeByExpression(it) }
-                               .firstOrNull { it.second != null } ?: return
-            val (expression, type) = pair
-            editor.selectionModel.setSelection(expression.startOffset, expression.endOffset)
-            type
-        }
-
-        if (type != null) {
-            HintManager.getInstance().showInformationHint(editor, renderTypeHint(type))
-        }
-    }
-
-
-    override fun update(e: AnActionEvent) {
-        // hide the action in IDEA 15 where a standard platform action is available
-        if (ActionManager.getInstance().getAction("ExpressionTypeInfo") != null) {
-            e.presentation.isVisible = false
-            return
-        }
-
-        val editor = e.getData<Editor>(CommonDataKeys.EDITOR)
-        val psiFile = e.getData<PsiFile>(CommonDataKeys.PSI_FILE)
-        e.presentation.isEnabled = editor != null && psiFile is KtFile
-    }
-
-    companion object {
-        fun renderTypeHint(type: KotlinType) = "<html>" + DescriptorRenderer.HTML.renderType(type) + "</html>"
-
-        fun typeByExpression(expression: KtExpression): KotlinType? {
-            val bindingContext = expression.analyze()
-
-            if (expression is KtCallableDeclaration) {
-                val descriptor = bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, expression] as? CallableDescriptor
-                if (descriptor != null) {
-                    return descriptor.returnType
-                }
-            }
-
-            return expression.getType(bindingContext)
-        }
-    }
-}

idea/src/org/jetbrains/kotlin/idea/codeInsight/KotlinExpressionTypeProvider.kt

@@ -18,11 +18,17 @@ package org.jetbrains.kotlin.idea.codeInsight
 
 import com.intellij.lang.ExpressionTypeProvider
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.idea.actions.ShowExpressionTypeAction
+import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.psi.KtCallableDeclaration
 import org.jetbrains.kotlin.psi.KtExpression
 import org.jetbrains.kotlin.psi.KtFunction
 import org.jetbrains.kotlin.psi.KtStatementExpression
 import org.jetbrains.kotlin.psi.psiUtil.parentsWithSelf
+import org.jetbrains.kotlin.renderer.DescriptorRenderer
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.calls.callUtil.getType
+import org.jetbrains.kotlin.types.KotlinType
 
 class KotlinExpressionTypeProvider : ExpressionTypeProvider<KtExpression>() {
     override fun getExpressionsAt(elementAt: PsiElement): List<KtExpression> =
@@ -33,9 +39,27 @@ class KotlinExpressionTypeProvider : ExpressionTypeProvider<KtExpression>() {
     }
 
     override fun getInformationHint(element: KtExpression): String {
-        val type = ShowExpressionTypeAction.typeByExpression(element) ?: return "Type is unknown"
-        return ShowExpressionTypeAction.renderTypeHint(type)
+        val type = typeByExpression(element) ?: return "Type is unknown"
+        return renderTypeHint(type)
     }
 
     override fun getErrorHint(): String = "No expression found"
+
+    companion object {
+        fun renderTypeHint(type: KotlinType) = "<html>" + DescriptorRenderer.HTML.renderType(type) + "</html>"
+
+        fun typeByExpression(expression: KtExpression): KotlinType? {
+            val bindingContext = expression.analyze()
+
+            if (expression is KtCallableDeclaration) {
+                val descriptor = bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, expression] as? CallableDescriptor
+                if (descriptor != null) {
+                    return descriptor.returnType
+                }
+            }
+
+            return expression.getType(bindingContext)
+        }
+    }
 }
+