fix quick navigation info for LazyValueResourceElementWrapper

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

@@ -216,7 +216,9 @@
                     serviceImplementation="org.jetbrains.android.exportSignedPackage.GenerateSignedApkSettings"/>
     <compilerSettingsFactory implementation="org.jetbrains.android.compiler.AndroidDexCompilerSettingsFactory"/>
     <problemFileHighlightFilter implementation="org.jetbrains.android.AndroidProblemFileHighlightingFilter"/>
+
     <lang.documentationProvider language="JAVA" implementationClass="org.jetbrains.android.AndroidDocumentationProvider" order="first"/>
+    <lang.documentationProvider language="XML" implementationClass="org.jetbrains.android.dom.AndroidXmlDocumentationProvider" order="first"/>
 
     <sdkType implementation="org.jetbrains.android.sdk.AndroidSdkType"/>
     <gotoDeclarationHandler implementation="org.jetbrains.android.AndroidGotoDeclarationHandler"/>

plugins/android/src/org/jetbrains/android/dom/AndroidXmlDocumentationProvider.java

@@ -0,0 +1,44 @@
+package org.jetbrains.android.dom;
+
+import com.intellij.lang.documentation.DocumentationProvider;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiManager;
+import org.jetbrains.android.dom.wrappers.LazyValueResourceElementWrapper;
+import org.jetbrains.android.resourceManagers.ValueResourceInfo;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+/**
+ * @author Eugene.Kudelevsky
+ */
+public class AndroidXmlDocumentationProvider implements DocumentationProvider {
+  @Override
+  public String getQuickNavigateInfo(PsiElement element, PsiElement originalElement) {
+    if (element instanceof LazyValueResourceElementWrapper) {
+      final ValueResourceInfo info = ((LazyValueResourceElementWrapper)element).getResourceInfo();
+      return "value resource '" + info.getName() + "' [" + info.getContainingFile().getName() + "]";
+    }
+    return null;
+  }
+
+  @Override
+  public List<String> getUrlFor(PsiElement element, PsiElement originalElement) {
+    return null;
+  }
+
+  @Override
+  public String generateDoc(PsiElement element, @Nullable PsiElement originalElement) {
+    return null;
+  }
+
+  @Override
+  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element) {
+    return null;
+  }
+
+  @Override
+  public PsiElement getDocumentationElementForLink(PsiManager psiManager, String link, PsiElement context) {
+    return null;
+  }
+}

plugins/android/testData/documentation/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+  <string name="myString">Hello</string>
+</resources>

plugins/android/testData/documentation/valueResourceReferenceQuickDoc.xml

@@ -0,0 +1,3 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android">
+    <TextView android:text="@string/myStri<caret>ng"/>
+</LinearLayout>

plugins/android/testSrc/org/jetbrains/android/AndroidDocumentationTest.java

@@ -0,0 +1,21 @@
+package org.jetbrains.android;
+
+import com.intellij.codeInsight.navigation.CtrlMouseHandler;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiReference;
+
+/**
+ * @author Eugene.Kudelevsky
+ */
+public class AndroidDocumentationTest extends AndroidTestCase {
+  private static final String BASE_PATH = "documentation/";
+
+  public void testValueResourceReferenceQuickDoc() {
+    myFixture.copyFileToProject(BASE_PATH + "strings.xml", "res/values/strings.xml");
+    final VirtualFile f = myFixture.copyFileToProject(BASE_PATH + getTestName(true) + ".xml", "res/layout/test.xml");
+    myFixture.configureFromExistingVirtualFile(f);
+    final PsiReference ref = myFixture.getFile().findReferenceAt(myFixture.getEditor().getCaretModel().getOffset());
+    assert ref != null;
+    assertEquals("value resource 'myString' [strings.xml]", CtrlMouseHandler.getInfo(ref.resolve(), ref.getElement()));
+  }
+}