#30: Improve compatibility with WebStorm 2017.1

Remove usage of classes that are not available in WebStorm 2017.1

Author: kshchepanovskyi

build.gradle

@@ -48,6 +48,9 @@ intellij {
     type = 'IC'
     updateSinceUntilBuild = false
     downloadSources = true
+    plugins = ['PsiViewer:3.28.93']
+//    localPath = '/home/kshchepanovskyi/.local/opt/WebStorm-171.3780.79/'
+//    instrumentCode = false
     publish {
         username = project.hasProperty('jetbrainsUser')    \
               ? project.property('jetbrainsUser')    \

src/main/java/io/protostuff/jetbrains/plugin/reference/file/FilePathReferenceProvider.java

@@ -28,7 +28,6 @@
 import com.intellij.psi.PsiDirectory;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFileSystemItem;
-import com.intellij.psi.PsiLiteralExpression;
 import com.intellij.psi.PsiManager;
 import com.intellij.psi.PsiReference;
 import com.intellij.psi.PsiReferenceProvider;
@@ -171,15 +170,6 @@ public boolean value(final PsiFileSystemItem element) {
     @NotNull
     public PsiReference[] getReferencesByElement(@NotNull PsiElement element, @NotNull final ProcessingContext context) {
         String text = null;
-        if (element instanceof PsiLiteralExpression) {
-            Object value = ((PsiLiteralExpression) element).getValue();
-            if (value instanceof String) {
-                text = (String) value;
-            }
-        }
-        //else if (element instanceof XmlAttributeValue) {
-        //  text = ((XmlAttributeValue)element).getValue();
-        //}
         if (text == null) {
             return PsiReference.EMPTY_ARRAY;
         }