com.day.util.diff.InlineChangeListener Maven / Gradle / Ivy

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package com.day.util.diff;

import java.io.PrintWriter;

/**
 */
public class InlineChangeListener implements ChangeListener {

    private final PrintWriter out;

    public InlineChangeListener(PrintWriter out) {
        this.out = out;
    }

    public void onDocumentsStart(Document left, Document right) {
        // ignore
    }

    public void onDocumentsEnd(Document left, Document right) {
        out.flush();
    }

    public void onChangeStart(int leftLine, int leftLen, int rightLine, int rightLen) {
        // ignore
    }

    public void onChangeEnd() {
        out.flush();
    }

    public void onUnmodified(int leftLine, int rightLine, Document.Element text) {
        out.print(text);
    }

    public void onDeleted(int leftLine, int rightLine, Document.Element text) {
        String author = null;
        if (text instanceof Document.AnnotatedElement) {
            Document.AnnotatedElement t = (Document.AnnotatedElement) text;
            if (t.getDocumentSource() instanceof DefaultDocumentSource) {
                DefaultDocumentSource src = (DefaultDocumentSource) t.getDocumentSource();
                author = src.getAuthor();
            }
        }
        out.print("");
        out.print(text);
        out.print("");
    }

    public void onInserted(int leftLine, int rightLine, Document.Element text) {
        String author = null;
        if (text instanceof Document.AnnotatedElement) {
            Document.AnnotatedElement t = (Document.AnnotatedElement) text;
            if (t.getDocumentSource() instanceof DefaultDocumentSource) {
                DefaultDocumentSource src = (DefaultDocumentSource) t.getDocumentSource();
                author = src.getAuthor();
            }
        }
        out.print("");
        out.print(text);
        out.print("");
    }
}