var lineComments = [];

function comment() {
    if (document.getElementById("CommentBox").style.display=="block") {
        document.getElementById("CommentBox").style.display="none";
    } else {
        document.getElementById("CommentBox").style.display="block";
        document.getElementById("CommentText").focus();
    }
}

function clear_comment() {
    document.getElementById("CommentText").value = "";
    comment();
    return true;
}

function del_line_comment(ev) {

    var td = ev.target.parentNode;
    while (td.childNodes.length) {
        td.removeChild(td.lastChild)
    }
    if (td.tagName == "TD") {
        var tr = td.parentNode;
        if (td.cellIndex > 1) { /* right cell. check left */
            if (tr.cells[1]
                .getElementsByTagName("TEXTAREA").length == 0) {
                    var tbl = tr.parentNode;
                    tbl.removeChild(tr);
            }
        } else {
            /* left. check right */
            if (tr.cells.length > 4 &&
                tr.cells[4].getElementsByTagName("TEXTAREA").length == 0
                || tr.cells.length == 2) {
                    var tbl = tr.parentNode;
                    tbl.removeChild(tr);
            }
        }
    } else {
        var pn = td.parentNode;
        pn.removeChild(td);
    }
    return false;
}

function add_udiff_comment(el) {
    if (el.tagName != "DIV" && el.tagName != "SPAN")
        return null;
    while (el && el.parentNode.className != "diff_div") {
        el = el.parentNode;
    }
    if (!el) return null;
    if (el.previousSibling && el.previousSibling.className == "lineComment")
        return null;
    if (el.id.charAt(0) != 'l' && el.id.charAt(0) != 'r' || parseInt(el.id.substr(1)) == NaN)
        return null;
    var base = document.createElement('DIV');
    base.className = "lineComment";
    el.parentNode.insertBefore(base, el);

    return add_inline_ta(el.id, base);
}

function add_sdiff_comment(el) {
    if (el.tagName != "TD" && el.tagName != "SPAN" && el.tagName != "TR")
        return null;

    while (el && el.tagName != "TD") {
        el = el.parentNode;
    }
    if (!el) return null;

    var left = el.cellIndex < 2;

    while (el && el.tagName != "TR") {
        el = el.parentNode;
    }
    if (!el || el.className == "lineComment") return null;
    var tds = el.getElementsByTagName('TD');
    var tag_id = left ? tds[0].id : tds[3].id;
    if (!tag_id) return null;

    var tr = null;
    var td = null;
    var i = 0;
    if (el.previousSibling && el.previousSibling.className == "lineComment") {
        tds = el.previousSibling.getElementsByTagName('TD');
        td = tds[(left || el.className != 'tr_diff')?1:4]
        if (td.getElementsByTagName('TEXTAREA').length > 0)
            return null;
        tr = el.previousSibling;
    } else {
        tr = document.getElementById('diff_table').insertRow(el.rowIndex);
        tr.className = 'lineComment';
        tr.insertCell(i++); /* left line number */
        var td1 = tr.insertCell(i++); /* comment */
        td1.align = "center";
        if (el.className == 'tr_diff') {
            tr.insertCell(i++); /* */
            tr.insertCell(i++);
            var td3 = tr.insertCell(i++);
            td3.align = "center";
            td = left ? td1:td3;
        } else { /* comment for both columns*/
            td1.colSpan = 5;
            td = td1;
        }
    }

    return add_inline_ta(tag_id, td);
}

function add_inline_ta(tag_id, base) {
    var ta = document.createElement('TEXTAREA');
    ta.id = "ta_"+tag_id;
    ta.name = "inline_comment";
    ta.style.marginTop = "1em";
    ta.cols = 70;
    ta.rows = 3;
    base.appendChild(ta);
    var btn = document.createElement('BUTTON');
    btn.innerHTML = "Delete";
    btn.onclick = function(e) {
        del_line_comment(e);
        e.stopPropagation();
    };
    base.appendChild(btn);
    ta.focus();
    return ta;
}

function apply_rep(rep) {
    if (rep.c && rep.c[''+item_id]) {
        var ta = document.getElementById("CommentText");
        ta.value = rep.c[''+item_id];
        comment();
    }
    if (rep.i && rep.i[''+item_id]) {
        var td;
        var icmts = rep.i[''+item_id];
        for (var c in icmts) {
            td = document.getElementById(c);
            if (td)
                add_inline_comment(td).value = icmts[c];
        }
    }
    if (rep.a && (has(rep.a, item_id) || has(rep.a, 0)))
        document.getElementById('ok_cb').checked = true;
}

function get_rep() {
    var rep = load_rep();
    if (!rep) rep = {};
    if (document.getElementById('ok_cb').checked) {
        if (!rep.a) rep.a = [];
        add(rep.a, item_id);
    } else {
        if (rep.a)
            if (has(rep.a, item_id))
                del(rep.a, item_id);
    }
    var cmt = document.getElementById("CommentText").value;
    if (cmt) {
        if (!rep.c) rep.c = {};
        rep.c[''+item_id] = cmt;
    } else {
        if (rep.c[''+item_id])
            delete rep.c[''+item_id];
    }
    var icmts = document.getElementsByName("inline_comment");
    if (!rep.i)
        rep.i = {};
    rep.i[''+item_id] = {};
    for (var ic=0; ic<icmts.length; ++ic) {
        rep.i[''+item_id][icmts[ic].id.substring(3)] = icmts[ic].value;
    }
    return rep;
}