Java String Extract extractHorizontalTabs(String line, int tabSize)

Description

extract Horizontal Tabs

License

Apache License

Declaration

private static String extractHorizontalTabs(String line, int tabSize) 

Method Source Code

//package com.java2s;
/**//from  w w  w .j  av a 2  s  . com
 * Copyright 2014 ashigeru.
 *
 * 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.ArrayList;
import java.util.List;

public class Main {
    /**
     * Extracts horizontal tabs in lines.
     * @param lines the source lines
     * @param tabSize the tab column size
     * @return the extracted lines
     */
    public static List<String> extractHorizontalTabs(List<String> lines, int tabSize) {
        List<String> results = new ArrayList<String>();
        for (String line : lines) {
            results.add(extractHorizontalTabs(line, tabSize));
        }
        return results;
    }

    private static String extractHorizontalTabs(String line, int tabSize) {
        assert line != null;
        StringBuilder buf = new StringBuilder();
        int column = 0;
        for (int i = 0, n = line.length(); i < n; i++) {
            char c = line.charAt(i);
            if (c == '\t') {
                int count = tabSize - column % tabSize;
                for (int j = 0; j < count; j++) {
                    buf.append(' ');
                }
            } else {
                buf.append(c);
                column++;
            }
        }
        return buf.toString();
    }
}

Related

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3. extractData(String message)
4. extractField(int position, String regex, String source)
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6. extractItems(String items)
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8. extractKeyCodes(String codes)
9. extractLines(String data, int tabWidth)