android xml code style notifier

plugins/android/src/META-INF/plugin.xml

@@ -336,6 +336,7 @@
     <lang.formatter language="XML" implementationClass="org.jetbrains.android.formatter.AndroidXmlFormattingModelBuilder"/>
     <codeStyleSettingsProvider implementation="org.jetbrains.android.formatter.AndroidXmlCodeStyleSettingsProvider"/>
     <predefinedCodeStyle implementation="org.jetbrains.android.formatter.AndroidXmlPredefinedCodeStyle"/>
+    <editorNotificationProvider implementation="org.jetbrains.android.formatter.AndroidCodeStyleNotificationProvider"/>
   </extensions>
 
   <extensionPoints>

plugins/android/src/org/jetbrains/android/formatter/AndroidCodeStyleNotificationProvider.java

@@ -0,0 +1,105 @@
+package org.jetbrains.android.formatter;
+
+import com.intellij.application.options.XmlCodeStyleSettingsProvider;
+import com.intellij.ide.highlighter.XmlFileType;
+import com.intellij.notification.NotificationDisplayType;
+import com.intellij.notification.NotificationsConfiguration;
+import com.intellij.notification.impl.NotificationsConfigurationImpl;
+import com.intellij.openapi.module.Module;
+import com.intellij.openapi.module.ModuleUtilCore;
+import com.intellij.openapi.options.ShowSettingsUtil;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Key;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.codeStyle.CodeStyleSettings;
+import com.intellij.psi.codeStyle.CodeStyleSettingsManager;
+import com.intellij.ui.EditorNotificationPanel;
+import com.intellij.ui.EditorNotifications;
+import org.jetbrains.android.facet.AndroidFacet;
+import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author Eugene.Kudelevsky
+ */
+public class AndroidCodeStyleNotificationProvider implements EditorNotifications.Provider<AndroidCodeStyleNotificationProvider.MyPanel> {
+  private static final Key<MyPanel> KEY = Key.create("android.xml.code.style.notification");
+
+  @NonNls private static final String ANDROID_XML_CODE_STYLE_NOTIFICATION_GROUP = "Android XML code style notification";
+
+  private final Project myProject;
+  private final EditorNotifications myNotifications;
+
+  public AndroidCodeStyleNotificationProvider(Project project, final EditorNotifications notifications) {
+    myProject = project;
+    myNotifications = notifications;
+  }
+
+  @Override
+  public Key<MyPanel> getKey() {
+    return KEY;
+  }
+
+  @Nullable
+  @Override
+  public MyPanel createNotificationPanel(VirtualFile file) {
+    if (file.getFileType() != XmlFileType.INSTANCE) {
+      return null;
+    }
+    final Module module = ModuleUtilCore.findModuleForFile(file, myProject);
+
+    if (module == null) {
+      return null;
+    }
+    final AndroidFacet facet = AndroidFacet.getInstance(module);
+
+    if (facet == null) {
+      return null;
+    }
+    final VirtualFile parent = file.getParent();
+    final VirtualFile resDir = parent != null ? parent.getParent() : null;
+
+    if (resDir == null || !facet.getLocalResourceManager().isResourceDir(resDir)) {
+      return null;
+    }
+    final CodeStyleSettings settings = CodeStyleSettingsManager.getSettings(myProject);
+    final AndroidXmlCodeStyleSettings androidSettings = AndroidXmlCodeStyleSettings.getInstance(settings);
+
+    if (androidSettings.USE_CUSTOM_SETTINGS) {
+      return null;
+    }
+    if (NotificationsConfigurationImpl.getSettings(ANDROID_XML_CODE_STYLE_NOTIFICATION_GROUP).
+      getDisplayType() == NotificationDisplayType.NONE) {
+      return null;
+    }
+    NotificationsConfiguration.getNotificationsConfiguration().register(
+      ANDROID_XML_CODE_STYLE_NOTIFICATION_GROUP, NotificationDisplayType.BALLOON, false);
+    return new MyPanel();
+  }
+
+  public class MyPanel extends EditorNotificationPanel {
+
+    MyPanel() {
+      setText("You can format your XML resources in the 'standard' Android way. " +
+              "Choose 'Set from... | Android' in the XML code style settings.");
+
+      createActionLabel("Open code style settings", new Runnable() {
+        @Override
+        public void run() {
+          ShowSettingsUtil.getInstance().showSettingsDialog(
+            myProject, XmlCodeStyleSettingsProvider.CONFIGURABLE_DISPLAY_NAME);
+          myNotifications.updateAllNotifications();
+        }
+      });
+
+      createActionLabel("Disable notification", new Runnable() {
+        @Override
+        public void run() {
+          NotificationsConfiguration.getNotificationsConfiguration()
+            .changeSettings(ANDROID_XML_CODE_STYLE_NOTIFICATION_GROUP, NotificationDisplayType.NONE, false);
+          myNotifications.updateAllNotifications();
+        }
+      });
+    }
+  }
+}

xml/impl/src/com/intellij/application/options/XmlCodeStyleSettingsProvider.java

@@ -27,6 +27,9 @@ import org.jetbrains.annotations.NotNull;
  * @author yole
  */
 public class XmlCodeStyleSettingsProvider extends CodeStyleSettingsProvider {
+
+  public static final String CONFIGURABLE_DISPLAY_NAME = ApplicationBundle.message("title.xml");
+
   @NotNull
   public Configurable createSettingsPage(final CodeStyleSettings settings, final CodeStyleSettings originalSettings) {
     return new CodeStyleAbstractConfigurable(settings, originalSettings, ApplicationBundle.message("title.xml")){
@@ -42,7 +45,7 @@ public class XmlCodeStyleSettingsProvider extends CodeStyleSettingsProvider {
 
   @Override
   public String getConfigurableDisplayName() {
-    return ApplicationBundle.message("title.xml");
+    return CONFIGURABLE_DISPLAY_NAME;
   }
 
   @Override