io.wcm.tooling.netbeans.sightly.completion.classLookup.ProvidedClassesCompleter.java Source code

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Here is the source code for io.wcm.tooling.netbeans.sightly.completion.classLookup.ProvidedClassesCompleter.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.tooling.netbeans.sightly.completion.classLookup;

import io.wcm.tooling.netbeans.sightly.completion.AbstractCompleter;
import io.wcm.tooling.netbeans.sightly.completion.BasicCompletionItem;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.text.Document;
import org.apache.commons.lang.StringUtils;
import org.netbeans.api.editor.mimelookup.MimeRegistration;
import org.netbeans.api.editor.mimelookup.MimeRegistrations;
import org.netbeans.spi.editor.completion.CompletionItem;
import org.netbeans.spi.editor.completion.CompletionProvider;

/**
 * Completer used for classes like Page or request. Currently uses static parameters and fixed object names (e.g. currentPage and wcmmode)
 *
 */
@MimeRegistrations(value = { @MimeRegistration(mimeType = "text/html", service = CompletionProvider.class),
        @MimeRegistration(mimeType = "text/x-jsp", service = CompletionProvider.class) })
public class ProvidedClassesCompleter extends AbstractCompleter {

    private static final Pattern LAST_DOLLAR_CURLYBRACE = Pattern.compile("(\\$\\{)(?!.*\\})");
    private static final Pattern LAST_VARIABLE = Pattern.compile("([a-zA-Z0-9.])+$");

    @Override
    public List<CompletionItem> getCompletionItems(Document document, String filter, int startOffset,
            int caretOffset) {
        List<CompletionItem> ret = new ArrayList<>();
        if (filter == null || StringUtils.isBlank(filter)) {
            return ret;
        }
        for (ProvidedClasses sightlyClass : ProvidedClasses.values()) {
            if (sightlyClass.getName().startsWith(filter) || filter.startsWith(sightlyClass.getName())) {
                // if there is a . in the text or the text is completed, we add the parameters, otherwise the actual classname
                if (filter.contains(".") || filter.equalsIgnoreCase(sightlyClass.getName())) {
                    for (String parameter : sightlyClass.getMembers()) {
                        String full = sightlyClass.getName() + "." + parameter;
                        if (full.startsWith(filter)) {
                            ret.add(new BasicCompletionItem(full, false, startOffset, caretOffset));
                        }
                    }
                } else {
                    ret.add(new BasicCompletionItem(sightlyClass.getName(), true, startOffset, caretOffset));
                }
            }
        }
        return ret;
    }

    @Override
    public int indexOfStartCharacter(char[] line) {
        final String text = String.copyValueOf(line);
        final Matcher matcher = LAST_DOLLAR_CURLYBRACE.matcher(text);

        if (matcher.find()) {
            final int beginIndex = matcher.start();
            final Matcher variableMatcher = LAST_VARIABLE.matcher(text);
            if (variableMatcher.find(beginIndex)) {
                return variableMatcher.start() - 1;
            }
        }
        return -1;
    }

}