Java JTextComponent Insert insertSimpleTemplate(JTextComponent target, String template)

Description

Expand the string template and replaces the selection with the expansion of the template.

License

Apache License

Parameter

Parameter	Description
target	a parameter
template	a parameter

Declaration

public static void insertSimpleTemplate(JTextComponent target, String template) 

Method Source Code

//package com.java2s;
/*//  www.j a  va 2s.c o m
 * Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
 * 
 * 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.  
 */

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.text.JTextComponent;

public class Main {
    /**
     * The Pattern to use for PTags in insertSimpleTemplate
     */
    public static final Pattern PTAGS_PATTERN = Pattern.compile("\\#\\{p:([^}]*)\\}");
    public static final String TEMPLATE_SELECTION = "#{selection}";

    /**
     * Expand the string template and replaces the selection with the expansion
     * of the template.  The template String may contain any of the following
     * special tags.
     *
     * <li>{@code #{selection}} replaced with the selection, if any.  If there is
     * no selection, then the {@code #{selection}} tag will be removed.
     * <li>{@code #{p:AnyText}} will be replaced by {@code any text} and then
     * set the text selection to {@code AnyText}
     *
     * This methood does NOT perform any indentation and the template should
     * generally span one line only
     *
     * @param target
     * @param template
     */
    public static void insertSimpleTemplate(JTextComponent target, String template) {
        String selected = target.getSelectedText();
        selected = (selected == null) ? "" : selected;
        StringBuffer sb = new StringBuffer(template.length());
        Matcher pm = PTAGS_PATTERN.matcher(template.replace(TEMPLATE_SELECTION, selected));
        int selStart = -1, selEnd = -1;
        int lineStart = 0;
        while (pm.find()) {
            selStart = pm.start() + lineStart;
            pm.appendReplacement(sb, pm.group(1));
            selEnd = sb.length();
        }
        pm.appendTail(sb);
        // String expanded = template.replace(TEMPLATE_SELECTION, selected);

        if (selStart >= 0) {
            selStart += target.getSelectionStart();
            selEnd += target.getSelectionStart();
        }
        target.replaceSelection(sb.toString());
        if (selStart >= 0) {
            // target.setCaretPosition(selStart);
            target.select(selStart, selEnd);
        }
    }
}

Related

1. insert(final JTextComponent component, final String string)
2. insertLineAfter(JTextComponent textComponent)
3. insertLineBefore(JTextComponent textComponent)
4. insertMagicString(JTextComponent target, int dot, String toInsert)
5. insertText(JTextComponent comp, String s)