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package org.netbeans.modules.git.ui.annotate;

44 import java.io.IOException;

45 import java.io.Reader;

46 import java.util.List;

48 /**

49 * Reader over annotation lines. It uses '\n' as

50 * line separator to match Document line separator.

51 *

52 * @author Petr Kuzel

53 */

54 public final class LinesReader extends Reader {

56 private List lines;

57 private int lineIndex;

58 private int columnIndex;

59 private boolean closed;

61 /**

62 * Creates reader from list of AnnotateLine objects.

63 */

64 LinesReader(List lines) {

65 this.lines = lines;

66 }

    public void close() throws IOException {

        if (closed) throw new IOException("Closed"); // NOI18N

70 closed = true;

71 }

    public int read(char cbuf[], int off, int len) throws IOException {

        if (closed) throw new IOException("Closed"); // NOI18N

        if (lineIndex >= lines.size()) return -1;

        AnnotateLine aline = (AnnotateLine) lines.get(lineIndex);

        String line = aline.getContent() + "\n"; // NOI18N

        int lineLen = line.length();

81 int unread = lineLen - columnIndex;

        int toRead = Math.min(unread, len);

        line.getChars(columnIndex, columnIndex + toRead, cbuf, off);

84 columnIndex += toRead;

85 if (columnIndex >= lineLen) {

86 columnIndex = 0;

87 lineIndex++;

88 }

89 return toRead;

90 }

91 }