com.drgarbage.bytecodevisualizer.editors.BytecodeVisualizerUtils.java Source code

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Here is the source code for com.drgarbage.bytecodevisualizer.editors.BytecodeVisualizerUtils.java

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/**
 * Copyright (c) 2008-2012, Dr. Garbage Community
 *
 * 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.drgarbage.bytecodevisualizer.editors;

import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.ISourceViewer;

import com.drgarbage.bytecodevisualizer.BytecodeVisualizerPlugin;

/**
 * Collection of util method.
 * 
 * @author Sergej Alekseev
 * @version $Revision$
 * $Id$
 */
public class BytecodeVisualizerUtils {

    public static int verifyLine(ISourceViewer sourceViewer, IJavaElement element, int caret) {
        if (element == null) {
            return IClassFileEditor.INVALID_LINE;
        }

        if (element == null) {
            return IClassFileEditor.INVALID_LINE;
        }

        IDocument document = sourceViewer.getDocument();
        if (document == null) {
            return IClassFileEditor.INVALID_LINE;
        }

        int line = IClassFileEditor.INVALID_LINE;
        try {
            /* get current line */
            line = document.getLineOfOffset(caret);

            /* check if the method declaration is selected */
            if (element.getElementType() == IJavaElement.METHOD) {
                IMethod method = (IMethod) element;
                int startOffset = method.getSourceRange().getOffset();
                int startLine = document.getLineOfOffset(startOffset);
                if (startLine == line) {
                    line = IClassFileEditor.METHOD_DECLARATION_LINE;
                } else {
                    line++;
                }
            }

        } catch (BadLocationException e) {

            e.printStackTrace();
            BytecodeVisualizerPlugin.log(e);
        } catch (JavaModelException e) {

            e.printStackTrace();
            BytecodeVisualizerPlugin.log(e);
        }

        return line;
    }
}