/*******************************************************************************
 * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *  
 *  This program and the accompanying materials are made available under the
 *  terms of the Eclipse Public License v1.0 which accompanies this distribution,
 *  and is available at http://www.eclipse.org/legal/epl-v10.html
 *  
 *******************************************************************************/
package com.cisco.yangide.editor.actions;

import java.util.LinkedList;
import java.util.List;
import java.util.ResourceBundle;

import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.BadPartitioningException;
import org.eclipse.jface.text.IDocumentExtension3;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.ui.texteditor.ITextEditor;

import com.cisco.yangide.editor.editors.YangPartitionScanner;
import com.cisco.yangide.editor.preferences.YangDocumentSetupParticipant;

/**
 * Action that removes the enclosing comment marks from a YANG block comment.
 * 
 * @author Alexey Kholupko
 */
public class RemoveBlockCommentAction extends BlockCommentAction {

    /**
     * Creates a new instance.
     * 
     * @param bundle the resource bundle
     * @param prefix a prefix to be prepended to the various resource keys (described in
     * <code>ResourceAction</code> constructor), or <code>null</code> if none
     * @param editor the text editor
     */
    public RemoveBlockCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
        super(bundle, prefix, editor);
    }

    /*
     * @see
     * com.cisco.yangide.editor.actions.AddBlockCommentAction#runInternal(org.eclipse.jface.text
     * .ITextSelection, org.eclipse.jface.text.IDocumentExtension3,
     * org.eclipse.jdt.internal.ui.actions.AddBlockCommentAction.Edit.EditFactory)
     */
    @Override
    protected void runInternal(ITextSelection selection, IDocumentExtension3 docExtension, Edit.EditFactory factory)
            throws BadPartitioningException, BadLocationException {
        List<Edit> edits = new LinkedList<Edit>();
        int tokenLength = getCommentStart().length();

        int offset = selection.getOffset();
        int endOffset = offset + selection.getLength();

        ITypedRegion partition = docExtension.getPartition(YangDocumentSetupParticipant.YANG_PARTITIONING, offset,
                false);
        int partOffset = partition.getOffset();
        int partEndOffset = partOffset + partition.getLength();

        while (partEndOffset < endOffset) {

            if (partition.getType() == YangPartitionScanner.YANG_COMMENT) {
                edits.add(factory.createEdit(partOffset, tokenLength, "")); //$NON-NLS-1$
                edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
            }

            partition = docExtension.getPartition(YangDocumentSetupParticipant.YANG_PARTITIONING, partEndOffset, false);
            partOffset = partition.getOffset();
            partEndOffset = partOffset + partition.getLength();
        }

        if (partition.getType() == YangPartitionScanner.YANG_COMMENT) {
            edits.add(factory.createEdit(partOffset, tokenLength, "")); //$NON-NLS-1$
            edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
        }

        executeEdits(edits);
    }

    /*
     * @see
     * com.cisco.yangide.editor.actions.AddBlockCommentAction#validSelection(org.eclipse.jface.text
     * .ITextSelection)
     */
    @Override
    protected boolean isValidSelection(ITextSelection selection) {
        return selection != null && !selection.isEmpty();
    }

}