Warning popup when .gwt.xml files are edited that the project must be rebuild.

#27

Author: BlueBoxWare

src/main/kotlin/com/gmail/blueboxware/libgdxplugin/GwtOutdatedListener.kt

@@ -0,0 +1,119 @@
+package com.gmail.blueboxware.libgdxplugin
+
+import com.intellij.ide.highlighter.JavaClassFileType
+import com.intellij.notification.Notification
+import com.intellij.notification.NotificationDisplayType
+import com.intellij.notification.NotificationGroup
+import com.intellij.notification.NotificationType
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.roots.ProjectFileIndex
+import com.intellij.openapi.vfs.VfsUtilCore
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.newvfs.BulkFileListener
+import com.intellij.openapi.vfs.newvfs.events.VFileEvent
+
+
+/*
+ * Copyright 2021 Blue Box Ware
+ *
+ * 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.
+ */
+class GwtOutdatedListener(val project: Project):
+        BulkFileListener {
+
+  private var balloon: Notification? = null
+
+  private var gwtFile: VirtualFile? = null
+
+  override fun after(events: MutableList<out VFileEvent>) {
+
+    var doCheck = false
+
+    for (event in events) {
+      event.file?.let { file ->
+        if (file.name.endsWith(".gwt.xml")) {
+          VfsUtilCore.findContainingDirectory(file, "html")?.let { html ->
+            if (ProjectFileIndex.getInstance(project).isInContent(html)) {
+              if (file.timeStamp >= gwtFile?.timeStamp ?: 0) {
+                gwtFile = file
+                doCheck = true
+              }
+            }
+          }
+        }
+      }
+    }
+
+    if (doCheck || balloon?.isExpired == false) {
+      ApplicationManager.getApplication().invokeLater {
+        gwtFile?.let { gwtFile ->
+          VfsUtilCore.findContainingDirectory(gwtFile, "html")?.let { html ->
+            var outDated = false
+            html.findChild("build")?.let { buildDir ->
+              VfsUtilCore.processFilesRecursively(buildDir) { file ->
+                if (file.fileType == JavaClassFileType.INSTANCE) {
+                  if (file.timeStamp < gwtFile.timeStamp) {
+                    outDated = true
+                    return@processFilesRecursively false
+                  }
+                }
+                true
+              }
+            }
+            if (!outDated) {
+              html.findChild("war")?.let { warDir ->
+                VfsUtilCore.processFilesRecursively(warDir) { file ->
+                  if (!file.isDirectory && file.timeStamp < gwtFile.timeStamp) {
+                    outDated = true
+                    return@processFilesRecursively false
+                  }
+                  true
+                }
+              }
+            }
+            if (balloon?.isExpired == false) {
+              if (!outDated) {
+                balloon?.hideBalloon()
+                balloon = null
+              }
+            } else {
+              if (outDated) {
+                balloon = GROUP.createNotification(
+                        message("gwt.build.outdated.title"),
+                        message("gwt.build.outdated.body"),
+                        NotificationType.WARNING)
+                balloon?.notify(project)
+              }
+            }
+            return@invokeLater
+          }
+        }
+
+        balloon?.hideBalloon()
+      }
+
+    }
+
+  }
+
+  companion object {
+    val GROUP = NotificationGroup(
+            "Outdated GWT",
+            NotificationDisplayType.STICKY_BALLOON,
+            false
+    )
+  }
+
+}
+

src/main/resources/META-INF/plugin.xml

@@ -303,6 +303,11 @@
                   topic="com.intellij.openapi.project.ProjectManagerListener"/>
     </applicationListeners>
 
+    <projectListeners>
+        <listener class="com.gmail.blueboxware.libgdxplugin.GwtOutdatedListener"
+                  topic="com.intellij.openapi.vfs.newvfs.BulkFileListener" />
+    </projectListeners>
+
     <extensions defaultExtensionNs="com.intellij">
 
         <postStartupActivity implementation="com.gmail.blueboxware.libgdxplugin.LibGDXStartupActivity"/>

src/main/resources/libgdxplugin.properties

@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+gwt.build.outdated.title=GWT Outdated
+gwt.build.outdated.body=*.gwt.xml files have been changed. The module needs a full rebuild.
+
 suppress.object=Suppress for object
 suppress.property= Suppress for property
 suppress.string=Suppress for string