com.intellij.ide.impl.dataRules.NavigatableRule.java Source code

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Here is the source code for com.intellij.ide.impl.dataRules.NavigatableRule.java

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/*
 * Copyright 2000-2009 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.ide.impl.dataRules;

import com.intellij.ide.util.EditSourceUtil;
import com.intellij.openapi.actionSystem.DataProvider;
import com.intellij.openapi.actionSystem.LangDataKeys;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.fileEditor.OpenFileDescriptor;
import com.intellij.pom.Navigatable;
import com.intellij.psi.PsiElement;

public class NavigatableRule implements GetDataRule {
    @Override
    public Object getData(DataProvider dataProvider) {
        final Navigatable navigatable = PlatformDataKeys.NAVIGATABLE.getData(dataProvider);
        if (navigatable != null && navigatable instanceof OpenFileDescriptor) {
            final OpenFileDescriptor openFileDescriptor = (OpenFileDescriptor) navigatable;

            if (openFileDescriptor.getFile().isValid()) {
                return openFileDescriptor;
            }
        }
        final PsiElement element = LangDataKeys.PSI_ELEMENT.getData(dataProvider);
        if (element instanceof Navigatable) {
            return element;
        }
        if (element != null) {
            return EditSourceUtil.getDescriptor(element);
        }

        final Object selection = PlatformDataKeys.SELECTED_ITEM.getData(dataProvider);
        if (selection instanceof Navigatable) {
            return selection;
        }

        return null;
    }
}