X:stylesheet {

X:output method="text";

X:param lang="'en'";
X:param configuration="'../xml/change_log_conf.xml'";

X:var conf = "document($configuration)/configuration";
X:var start = "$conf/start";
X:var indent = "$conf/indent";
X:var max = "$conf/length";
X:var br = {<br>}


X:template = "/" { !! "change_log"; }
X:template = "change_log" { !! "changes"; }


X:template = "changes" {
    X:text {
}

    !{substring(concat($conf/changes[@lang=$lang]/title,
                       //change_log/@title,
                       ' ', @ver,
                       '                                                    '),
                1, $conf/changes[@lang=$lang]/length)}

    X:if "$lang='ru'" { !{@date} }

    X:if "$lang='en'" {
        !{substring(@date, 1, 2)}
        !{$conf/changes[@lang=$lang]/month[number(substring(current()/@date,
                                                            4, 2))]}
        !{substring(@date, 7, 4)}
    }

    X:text {
}

    !! "change";

    X:text {
}
}


X:template = "change" {
    X:var prefix = "$conf/changes[@lang=$lang]/*[local-name(.)=current()/@type]"

    X:var postfix = { X:if "$prefix" { X:text {: } } }

    !! "para[@lang=$lang]" (prefix = "concat($start, $prefix, $postfix)");
}


X:template para(prefix) = "para" {
    X:var text = { !!; }

    X:text {
}

    !wrap(text = "normalize-space($text)",
          prefix = { X:if "position() = 1" { !{$prefix} } else { !{$indent} } })
}


X:template wrap(text, prefix) {
    X:if "$text" {
        X:var offset = {
            X:choose {
                X:when "starts-with($text, concat($br, ' '))" {
                    !{string-length($br) + 2}
                }
                X:when "starts-with($text, $br)" {
                    !{string-length($br) + 1}
                }
                X:otherwise {
                    1
                }
            }
        }

        X:var length = {
            !length(text = "substring($text, $offset)",
                    prefix = "string-length($prefix)",
                    length = "$max")
        }

        !{$prefix}

        !{normalize-space(translate(substring($text, $offset, $length),
                                    ' ', ' '))}

        X:text {
}

        !wrap(text = "substring($text, $length + $offset)", prefix = "$indent")
    }
}


X:template length(text, prefix, length) {
    X:var break = "substring-before(substring($text, 1,
                                    $length - $prefix + string-length($br)),
                                    $br)"

    X:choose {
        X:when "$break" { !{string-length($break)} }

        X:when "$length = 0" { !{$max - $prefix} }

        X:when "string-length($text) + $prefix <= $length" {
            !{$length - $prefix}
        }

        X:when "substring($text, $length - $prefix + 1, 1) = ' '" {
            !{$length - $prefix + 1}
        }

        X:otherwise {
            !length(text = "$text", prefix = "$prefix", length = "$length - 1")
        }
    }
}


X:template = "at" {@}
X:template = "br" { !{$br} }
X:template = "nobr" { !{translate(., ' ', ' ')} }


}