/*
 * Copyright 2013 Grzegorz Ligas
 *
 * 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 org.intellij.xquery.usage;

import com.intellij.find.impl.HelpID;
import com.intellij.lang.cacheBuilder.DefaultWordsScanner;
import com.intellij.lang.cacheBuilder.WordsScanner;
import com.intellij.lang.findUsages.FindUsagesProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.tree.TokenSet;
import org.intellij.xquery.XQueryLexer;
import org.intellij.xquery.XQueryParserDefinition;
import org.intellij.xquery.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * User: ligasgr
 * Date: 04/07/13
 * Time: 12:54
 */
public class XQueryFindUsageProvider implements FindUsagesProvider {
    private static final DefaultWordsScanner WORDS_SCANNER =
            new DefaultWordsScanner(new XQueryLexer(),
                    TokenSet.EMPTY, XQueryParserDefinition.COMMENTS, XQueryParserDefinition.STRINGS);

    @Nullable
    @Override
    public WordsScanner getWordsScanner() {
        return WORDS_SCANNER;
    }

    @Override
    public boolean canFindUsagesFor(@NotNull PsiElement psiElement) {
        return psiElement instanceof XQueryNamedElement;
    }

    @Nullable
    @Override
    public String getHelpId(@NotNull PsiElement psiElement) {
        return HelpID.FIND_OTHER_USAGES;
    }

    @NotNull
    @Override
    public String getType(@NotNull PsiElement element) {
        if (element instanceof XQueryVarName) {
            return "variable";
        } else if (element instanceof XQueryFunctionName) {
            return "function";
        } else if (element instanceof XQueryNamespaceName) {
            return "namespace name";
        } else {
            return "other";
        }
    }


    @NotNull
    @Override
    public String getDescriptiveName(@NotNull PsiElement element) {
        return element.getText();
    }

    @NotNull
    @Override
    public String getNodeText(@NotNull PsiElement element, boolean useFullName) {
        if (element.getParent() instanceof XQueryVarDecl || element.getParent() instanceof XQueryFunctionDecl || element.getParent() instanceof XQueryModuleDecl || element.getParent() instanceof XQueryModuleImport || element.getParent() instanceof XQueryNamespaceDecl) {
            return element.getParent().getText();
        } else {
            return element.getText();
        }
    }
}

@@ -1246,68 +1246,80 @@
 r %7B%0A
+%0A
     
-private static final DefaultWordsScanner WORDS_SCANNER =
+@Nullable%0A    @Override%0A    public WordsScanner getWordsScanner() %7B
 %0A   
@@ -1323,19 +1323,22 @@
         
-   
+return
  new Def
@@ -1373,20 +1373,16 @@
 exer(),%0A
-    
         
@@ -1474,111 +1474,8 @@
 GS);
-%0A%0A    @Nullable%0A    @Override%0A    public WordsScanner getWordsScanner() %7B%0A        return WORDS_SCANNER;
 %0A   

Fix concurrency issue with multiple words scanners.