template file references should be highlighted as warnings (PY-7253)

python/openapi/src/com/jetbrains/python/templateLanguages/TemplateFileReference.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2000-2012 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.jetbrains.python.templateLanguages;
+
+import com.intellij.lang.annotation.HighlightSeverity;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReference;
+import com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReferenceSet;
+import com.jetbrains.python.psi.PsiReferenceEx;
+import com.jetbrains.python.psi.types.TypeEvalContext;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author yole
+ */
+public class TemplateFileReference extends FileReference implements PsiReferenceEx {
+  public TemplateFileReference(@NotNull FileReferenceSet fileReferenceSet, TextRange range, int index, String text) {
+    super(fileReferenceSet, range, index, text);
+  }
+
+  @Nullable
+  @Override
+  public HighlightSeverity getUnresolvedHighlightSeverity(TypeEvalContext context) {
+    return HighlightSeverity.WARNING;
+  }
+
+  @Nullable
+  @Override
+  public String getUnresolvedDescription() {
+    return "Template file '" + getCanonicalText() + "' not found";
+  }
+}

python/openapi/src/com/jetbrains/python/templateLanguages/TemplateFileReferenceSet.java

@@ -4,8 +4,10 @@ import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleUtilCore;
 import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.SystemInfo;
+import com.intellij.openapi.util.TextRange;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
+import com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReference;
 import com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReferenceSet;
 import com.intellij.util.containers.ContainerUtil;
 import com.jetbrains.python.PythonStringUtil;
@@ -92,4 +94,9 @@ public class TemplateFileReferenceSet extends FileReferenceSet {
   protected List<VirtualFile> getRoots(Module module) {
     return TemplatesService.getInstance(module).getTemplateFolders();
   }
+
+  @Override
+  public FileReference createFileReference(TextRange range, int index, String text) {
+    return new TemplateFileReference(this, range, index, text);
+  }
 }