blue.orchestra.editor.blueSynthBuilder.BSBCompletionProvider.java Source code

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Here is the source code for blue.orchestra.editor.blueSynthBuilder.BSBCompletionProvider.java

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/*
 * blue - object composition environment for csound
 * Copyright (C) 2012
 * Steven Yi <stevenyi@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package blue.orchestra.editor.blueSynthBuilder;

import blue.orchestra.blueSynthBuilder.BSBGraphicInterface;
import blue.orchestra.blueSynthBuilder.BSBObject;
import java.util.Iterator;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.JTextComponent;
import javax.swing.text.StyledDocument;
import org.apache.commons.lang3.StringUtils;
import org.netbeans.api.editor.mimelookup.MimeRegistration;
import org.netbeans.spi.editor.completion.CompletionProvider;
import org.netbeans.spi.editor.completion.CompletionResultSet;
import org.netbeans.spi.editor.completion.CompletionTask;
import org.netbeans.spi.editor.completion.support.AsyncCompletionQuery;
import org.netbeans.spi.editor.completion.support.AsyncCompletionTask;
import org.openide.util.Exceptions;

/**
 *
 * @author stevenyi
 */
public class BSBCompletionProvider implements CompletionProvider {

    BSBGraphicInterface bsbInterface = null;

    public void setBSBGraphicInterface(BSBGraphicInterface bsbInterface) {
        this.bsbInterface = bsbInterface;
    }

    @Override
    public CompletionTask createTask(int queryType, JTextComponent component) {
        if (queryType != CompletionProvider.COMPLETION_QUERY_TYPE || bsbInterface == null) {
            return null;
        }
        return new AsyncCompletionTask(new AsyncCompletionQuery() {
            @Override
            protected void query(CompletionResultSet completionResultSet, Document document, int caretOffset) {
                String filter = null;
                int startOffset = caretOffset - 1;
                try {
                    final StyledDocument bDoc = (StyledDocument) document;
                    final int lineStartOffset = getRowFirstNonWhite(bDoc, caretOffset);
                    final char[] line = bDoc.getText(lineStartOffset, caretOffset - lineStartOffset).toCharArray();
                    final int whiteOffset = indexOfWhite(line);
                    filter = new String(line, whiteOffset + 1, line.length - whiteOffset - 1);
                    if (whiteOffset > 0) {
                        startOffset = lineStartOffset + whiteOffset + 1;
                    } else {
                        startOffset = lineStartOffset;
                    }
                } catch (BadLocationException ex) {
                    Exceptions.printStackTrace(ex);
                }

                if (filter != null && !filter.equals("")) {

                    int index = filter.indexOf("<");

                    if (index >= 0) {

                        filter = filter.substring(index + 1);
                        Iterator<BSBObject> bsbObjects = bsbInterface.iterator();
                        while (bsbObjects.hasNext()) {
                            BSBObject bsbObj = bsbObjects.next();

                            String[] keys = bsbObj.getReplacementKeys();

                            if (keys == null) {
                                continue;
                            }

                            for (String key : keys) {
                                if (StringUtils.containsWhitespace(key)) {
                                    continue;
                                }
                                if (filter.isEmpty() || key.startsWith(filter)) {
                                    completionResultSet.addItem(new BSBCompletionItem(bsbObj, key));
                                }
                            }
                        }

                    }

                }

                completionResultSet.finish();
            }
        }, component);
    }

    @Override
    public int getAutoQueryTypes(JTextComponent component, String typedText) {
        return 0;
    }

    static int getRowFirstNonWhite(StyledDocument doc, int offset) throws BadLocationException {
        Element lineElement = doc.getParagraphElement(offset);
        int start = lineElement.getStartOffset();
        while (start + 1 < lineElement.getEndOffset()) {
            try {
                if (doc.getText(start, 1).charAt(0) != ' ') {
                    break;
                }
            } catch (BadLocationException ex) {
                throw (BadLocationException) new BadLocationException(
                        "calling getText(" + start + ", " + (start + 1) + ") on doc of length: " + doc.getLength(),
                        start).initCause(ex);
            }
            start++;
        }
        return start;
    }

    static int indexOfWhite(char[] line) {
        int i = line.length;
        while (--i > -1) {
            final char c = line[i];
            if (Character.isWhitespace(c)) {
                return i;
            }
        }
        return -1;
    }
}