goto related localizations for properties files

plugins/properties/properties-psi-impl/src/META-INF/PropertiesPlugin.xml

@@ -84,6 +84,7 @@
     <iconProvider implementation="com.intellij.lang.properties.xml.XmlPropertiesIconProvider"/>
     <psi.referenceContributor language="XML" implementation="com.intellij.lang.properties.xml.XmlPropertiesReferenceContributor"/>
     <lang.foldingBuilder language="Properties" implementationClass="com.intellij.lang.properties.editor.PropertiesFoldingBuilder" />
+    <gotoRelatedProvider implementation="com.intellij.lang.properties.editor.GotoResourceBundleLocalizationsProvider"/>
   </extensions>
 
   <project-components>

plugins/properties/src/com/intellij/lang/properties/editor/GotoResourceBundleLocalizationsProvider.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2000-2014 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 com.intellij.lang.properties.editor;
+
+import com.intellij.lang.properties.ResourceBundle;
+import com.intellij.lang.properties.psi.PropertiesFile;
+import com.intellij.navigation.GotoRelatedItem;
+import com.intellij.navigation.GotoRelatedProvider;
+import com.intellij.openapi.actionSystem.*;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
+import com.intellij.util.Function;
+import com.intellij.util.containers.ContainerUtil;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * @author Dmitry Batkovich
+ */
+public class GotoResourceBundleLocalizationsProvider extends GotoRelatedProvider {
+
+  @NotNull
+  @Override
+  public List<? extends GotoRelatedItem> getItems(@NotNull final DataContext context) {
+    final PsiFile psiFile = CommonDataKeys.PSI_FILE.getData(context);
+    if (psiFile == null || !(psiFile instanceof PropertiesFile)) {
+      return Collections.emptyList();
+    }
+    final ResourceBundle resourceBundle = ((PropertiesFile)psiFile).getResourceBundle();
+    final List<PropertiesFile> bundlePropertiesFiles = resourceBundle.getPropertiesFiles(((PropertiesFile)psiFile).getProject());
+    assert bundlePropertiesFiles.size() != 0;
+    if (bundlePropertiesFiles.size() != 1) {
+      final ArrayList<PropertiesFile> propertiesFilesWithoutCurrent = ContainerUtil.newArrayList(bundlePropertiesFiles);
+      propertiesFilesWithoutCurrent.remove(psiFile);
+      return ContainerUtil.map(propertiesFilesWithoutCurrent, new Function<PropertiesFile, GotoRelatedItem>() {
+        @Override
+        public GotoRelatedItem fun(final PropertiesFile propertiesFile) {
+          return new GotoRelatedItem((PsiElement) propertiesFile, "Other Localizations");
+        }
+      });
+    } else {
+      return Collections.emptyList();
+    }
+  }
+}