/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* This file contains the munger functions and rules used by ChatZilla.
 * It's generally a bad idea to call munger functions inside ChatZilla for
 * anything but munging (chat) output.
 */

function initMunger()
{
    /* linkRE: the general URL linkifier regular expression:
     *
     * - start with whitespace, non-word, or begining-of-line
     * - then match:
     *   - EITHER scheme (word + hyphen), colon, then lots of non-whitespace
     *   - OR "www" followed by at least 2 sets of:
     *     - "." plus some non-whitespace, non-"." characters
     * - must end match with a word-break
     * - include a "/" or "=" beyond break if present
     * - end with whitespace, non-word, or end-of-line
     */
    client.linkRE =
        /(?:\W|^)((?:(\w[\w-]+):[^\s]+|www(\.[^.\s]+){2,})\b[\/=\)]?)(?=\s|\W|$)/;

    // Colours: \x03, with optional foreground and background colours
    client.colorRE = /(\x03((\d{1,2})(,\d{1,2}|)|))/;

    client.whitespaceRE = new RegExp("(\\S{" + client.MAX_WORD_DISPLAY + ",})");

    const LOW_PRIORITY = 5;
    const NORMAL_PRIORITY = 10;
    const HIGH_PRIORITY = 15;
    const HIGHER_PRIORITY = 20;

    var munger = client.munger = new CMunger(insertText);
    // Special internal munger!
    munger.addRule(".inline-buttons", /(\[\[.*?\]\])/, insertInlineButton,
                   HIGH_PRIORITY, LOW_PRIORITY, false);
    munger.addRule("quote", /(``|'')/, insertQuote,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("bold", /(?:[\s(\[]|^)(\*[^*()]*\*)(?:[\s\]).,;!\?]|$)/,
                   "chatzilla-bold", NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("underline", /(?:[\s(\[]|^)(\_[^_()]*\_)(?:[\s\]).,;!\?]|$)/,
                   "chatzilla-underline", NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("italic", /(?:\s|^)(\/[^\/()]*\/)(?:[\s.,]|$)/,
                   "chatzilla-italic", NORMAL_PRIORITY, NORMAL_PRIORITY);
    /* allow () chars inside |code()| blocks */
    munger.addRule("teletype", /(?:\s|^)(\|[^|]*\|)(?:[\s.,]|$)/,
                   "chatzilla-teletype", NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".mirc-colors", client.colorRE, mircChangeColor,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".mirc-bold", /(\x02)/, mircToggleBold,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".mirc-underline", /(\x1f)/, mircToggleUnder,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".mirc-color-reset", /(\x0f)/, mircResetColor,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".mirc-reverse", /(\x16)/, mircReverseColor,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule(".ansi-escape-sgr", /(\x1b\[([\d;]*)m)/,
                   ansiEscapeSGR, NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("ctrl-char", /([\x01-\x1f])/, showCtrlChar,
                   NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("link", client.linkRE, insertLink, NORMAL_PRIORITY, HIGH_PRIORITY);

    // This has a higher starting priority so as to get it to match before the
    // normal link, which won't know about mailto and then fail.
    munger.addRule(".mailto",
       /(?:\W|^)((mailto:)?[^:;\\<>\[\]()\'\"\s\u201d]+@[^.<>\[\]()\'\"\s\u201d]+\.[^<>\[\]()\'\"\s\u201d]+)/i,
                   insertMailToLink, NORMAL_PRIORITY, HIGHER_PRIORITY, false);
    
    addBugzillaLinkMungerRule(client.prefs["bugKeyword"], NORMAL_PRIORITY, NORMAL_PRIORITY);

    munger.addRule("channel-link",
                /(?:[^\w#]|^)[@%+]?(#[^<>,\[\](){}\"\s\u201d]*[^:,.<>\[\](){}\'\"\s\u201d])/i,
                   insertChannelLink, NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("talkback-link", /(?:\W|^)(TB\d{8,}[A-Z]?)(?:\W|$)/,
                   insertTalkbackLink, NORMAL_PRIORITY, NORMAL_PRIORITY);

    munger.addRule("face",
         /((^|\s)(?:[>O]?[B8=:;(xX%][~']?[-^v"]?(?:[)|(PpSs0oO#\?\*\[\]\/\\]|D+)|>[-^v]?\)|[oO9][._][oO9])(\s|$))/,
         insertSmiley, NORMAL_PRIORITY, NORMAL_PRIORITY);
    munger.addRule("rheet", /(?:\W|^)(rhee+t\!*)(?:\s|$)/i, insertRheet, 10, 10);
    munger.addRule("word-hyphenator", client.whitespaceRE,
                   insertHyphenatedWord, LOW_PRIORITY, NORMAL_PRIORITY);

    client.enableColors = client.prefs["munger.colorCodes"];
    var branch = client.prefManager.prefBranch;
    for (var entry in munger.entries)
    {
        if (!isinstance(munger.entries[entry], Object))
            continue;

        for (var rule in munger.entries[entry])
        {
            if (rule[0] == ".")
                continue;

            try
            {
                munger.entries[entry][rule].enabled =
                    branch.getBoolPref("munger." + rule);
            }
            catch (ex)
            {
                // nada
            }
        }
    }
}

function addBugzillaLinkMungerRule(keywords, priority, startPriority)
{
    client.munger.addRule("bugzilla-link",
        new RegExp("(?:\\W|^)(("+keywords+")\\s+(?:#?\\d+|#[^\\s,]{1,20})(?:\\s+comment\\s+#?\\d+)?)","i"),
        insertBugzillaLink, priority, startPriority);
    
}

function insertLink(matchText, containerTag, data, mungerEntry)
{
    var href;
    var linkText;

    var trailing;
    ary = matchText.match(/([.,?\)]+)$/);
    if (ary)
    {
        linkText = RegExp.leftContext;
        trailing = ary[1];
        
        // We special-case links that end with (something), often found on wikis
        // if "trailing" starts with ) and there's an unclosed ( in the
        // "linkText"; then we put the final ) back in
        if ((trailing.indexOf(")") == 0) && (linkText.match(/\([^\)]*$/)))
        {
            
            linkText += ")";
            trailing = trailing.substr(1);
        }
    }
    else
    {
        linkText = matchText;
    }

    var ary = linkText.match(/^(\w[\w-]+):/);
    if (ary)
    {
        if (!client.checkURLScheme(ary[1]))
        {
            mungerEntry.enabled = false;
            client.munger.munge(matchText, containerTag, data);
            mungerEntry.enabled = true;
            return;
        }

        href = linkText;
    }
    else
    {
        href = "http://" + linkText;
    }

    /* This gives callers to the munger control over URLs being logged; the
     * channel topic munger uses this, as well as the "is important" checker.
     * If either of |dontLogURLs| or |noStateChange| is present and true, we
     * don't log.
     */
    if ((!("dontLogURLs" in data) || !data.dontLogURLs) &&
        (!("noStateChange" in data) || !data.noStateChange) &&
        client.urlLogger)
    {
        client.urlLogger.append(href);
    }

    var anchor = document.createElementNS(XHTML_NS, "html:a");
    var mircRE = /\x1f|\x02|\x0f|\x16|\x03([0-9]{1,2}(,[0-9]{1,2})?)?/g;
    anchor.setAttribute("href", href.replace(mircRE, ""));

    // Carry over formatting.
    var otherFormatting = calcClass(data);
    if (otherFormatting)
        anchor.setAttribute("class", "chatzilla-link " + otherFormatting);
    else
        anchor.setAttribute("class", "chatzilla-link");

    anchor.setAttribute("target", "_content");
    mungerEntry.enabled = false;
    data.inLink = true;
    client.munger.munge(linkText, anchor, data);
    mungerEntry.enabled = true;
    delete data.inLink;
    containerTag.appendChild(anchor);
    if (trailing)
        insertText(trailing, containerTag, data);

}

function insertMailToLink(matchText, containerTag, eventData, mungerEntry)
{
    if (("inLink" in eventData) && eventData.inLink)
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    var href;

    if (matchText.toLowerCase().indexOf("mailto:") != 0)
        href = "mailto:" + matchText;
    else
        href = matchText;

    var anchor = document.createElementNS(XHTML_NS, "html:a");
    var mircRE = /\x1f|\x02|\x0f|\x16|\x03([0-9]{1,2}(,[0-9]{1,2})?)?/g;
    anchor.setAttribute("href", href.replace(mircRE, ""));

    // Carry over formatting.
    var otherFormatting = calcClass(eventData);
    if (otherFormatting)
        anchor.setAttribute("class", "chatzilla-link " + otherFormatting);
    else
        anchor.setAttribute("class", "chatzilla-link");

    //anchor.setAttribute ("target", "_content");
    mungerEntry.enabled = false;
    eventData.inLink = true;
    client.munger.munge(matchText, anchor, eventData);
    mungerEntry.enabled = true;
    delete eventData.inLink;
    containerTag.appendChild(anchor);

}

function insertChannelLink(matchText, containerTag, eventData, mungerEntry)
{
    if (("inLink" in eventData) && eventData.inLink)
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    var bogusChannels =
        /^#(include|error|define|if|ifdef|else|elsif|endif)$/i;

    if (!("network" in eventData) || !eventData.network ||
        matchText.search(bogusChannels) != -1)
    {
        containerTag.appendChild(document.createTextNode(matchText));
        return;
    }

    var linkText = removeColorCodes(matchText);
    var encodedLinkText = fromUnicode(linkText, eventData.sourceObject);
    var anchor = document.createElementNS(XHTML_NS, "html:a");
    anchor.setAttribute("href", eventData.network.getURL(encodedLinkText));

    // Carry over formatting.
    var otherFormatting = calcClass(eventData);
    if (otherFormatting)
        anchor.setAttribute("class", "chatzilla-link " + otherFormatting);
    else
        anchor.setAttribute("class", "chatzilla-link");

    mungerEntry.enabled = false;
    eventData.inLink = true;
    client.munger.munge(matchText, anchor, eventData);
    mungerEntry.enabled = true;
    delete eventData.inLink;
    containerTag.appendChild(anchor);
}

function insertTalkbackLink(matchText, containerTag, eventData, mungerEntry)
{
    if (("inLink" in eventData) && eventData.inLink)
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    var anchor = document.createElementNS(XHTML_NS, "html:a");

    anchor.setAttribute("href", "http://talkback-public.mozilla.org/" +
                        "search/start.jsp?search=2&type=iid&id=" + matchText);

    // Carry over formatting.
    var otherFormatting = calcClass(eventData);
    if (otherFormatting)
        anchor.setAttribute("class", "chatzilla-link " + otherFormatting);
    else
        anchor.setAttribute("class", "chatzilla-link");

    mungerEntry.enabled = false;
    client.munger.munge(matchText, anchor, eventData);
    mungerEntry.enabled = true;
    containerTag.appendChild(anchor);
}

function insertBugzillaLink (matchText, containerTag, eventData, mungerEntry)
{
    if (("inLink" in eventData) && eventData.inLink)
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    var prefs = client.prefs;
    if (eventData.channel)
        prefs = eventData.channel.prefs;
    else if (eventData.network)
        prefs = eventData.network.prefs;

    var bugURL = prefs["bugURL"];
    var bugURLcomment = prefs["bugURL.comment"];

    if (bugURL.length > 0)
    {
        var idOrAlias = matchText.match(new RegExp("(?:"+client.prefs["bugKeyword"]+")\\s+#?(\\d+|[^\\s,]{1,20})","i"))[1];
        bugURL = bugURL.replace("%s", idOrAlias);

        var commentNum = matchText.match(/comment\s+#?(\d+)/i);
        if (commentNum)
        {
            /* If the comment is a complete URL, use only that, replacing %1$s
             * and %2$s with the bug number and comment number, respectively.
             * Otherwise, append the comment preference to the main one,
             * replacing just %s in each.
             */
            if (bugURLcomment.match(/^\w+:/))
            {
                bugURL = bugURLcomment;
                bugURL = bugURL.replace("%1$s", idOrAlias);
                bugURL = bugURL.replace("%2$s", commentNum[1]);
            }
            else
            {
                bugURL += bugURLcomment.replace("%s", commentNum[1]);
            }
        }

        var anchor = document.createElementNS(XHTML_NS, "html:a");
        anchor.setAttribute("href", bugURL);
        // Carry over formatting.
        var otherFormatting = calcClass(eventData);
        if (otherFormatting)
            anchor.setAttribute("class", "chatzilla-link " + otherFormatting);
        else
            anchor.setAttribute("class", "chatzilla-link");

        anchor.setAttribute("target", "_content");
        mungerEntry.enabled = false;
        eventData.inLink = true;
        client.munger.munge(matchText, anchor, eventData);
        mungerEntry.enabled = true;
        delete eventData.inLink;
        containerTag.appendChild(anchor);
    }
    else
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
    }
}

function insertRheet(matchText, containerTag, eventData, mungerEntry)
{
    if (("inLink" in eventData) && eventData.inLink)
    {
        mungerEntry.enabled = false;
        client.munger.munge(matchText, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    var anchor = document.createElementNS(XHTML_NS, "html:a");
    anchor.setAttribute("href",
                        "http://ftp.mozilla.org/pub/mozilla.org/mozilla/libraries/bonus-tracks/rheet.wav");
    anchor.setAttribute("class", "chatzilla-rheet chatzilla-link");
    //anchor.setAttribute ("target", "_content");
    insertText(matchText, anchor, eventData);
    containerTag.appendChild(anchor);
}

function insertQuote (matchText, containerTag)
{
    if (matchText == "``")
        containerTag.appendChild(document.createTextNode("\u201c"));
    else
        containerTag.appendChild(document.createTextNode("\u201d"));
    containerTag.appendChild(document.createElementNS(XHTML_NS, "html:wbr"));
}

function insertSmiley(emoticon, containerTag, eventData, mungerEntry)
{
    let smilies = {
        "face-alien": "\uD83D\uDC7D",
        "face-lol": "\uD83D\uDE02",
        "face-laugh": "\uD83D\uDE04",
        "face-sweat_smile": "\uD83D\uDE05",
        "face-innocent": "\uD83D\uDE07",
        "face-evil": "\uD83D\uDE08",
        "face-wink": "\uD83D\uDE09",
        "face-smile": "\uD83D\uDE0A",
        "face-cool": "\uD83D\uDE0E",
        "face-neutral": "\uD83D\uDE10",
        "face-thinking": "\uD83D\uDE14",
        "face-confused": "\uD83D\uDE15",
        "face-kissing": "\uD83D\uDE17",
        "face-tongue": "\uD83D\uDE1B",
        "face-worried": "\uD83D\uDE1F",
        "face-angry": "\uD83D\uDE20",
        "face-cry": "\uD83D\uDE22",
        "face-surprised": "\uD83D\uDE2D",
        "face-eek": "\uD83D\uDE31",
        "face-red": "\uD83D\uDE33",
        "face-dizzy": "\uD83D\uDE35",
        "face-sad": "\uD83D\uDE41",
        "face-rolleyes": "\uD83D\uDE44",
        "face-zipped": "\uD83E\uDD10",
        "face-rofl": "\uD83E\uDD23",
        "face-woozy": "\uD83E\uDD74",
    };

    let type;

    if (emoticon.search(/\>[-^v]?\)/) != -1)
        type = "face-alien";
    else if (emoticon.search(/\>[=:;][-^v]?[(|]|[Xx][-^v]?[(\[]/) != -1)
        type = "face-angry";
    else if (emoticon.search(/[=:;][-^v]?[Ss]/) != -1)
        type = "face-confused";
    else if (emoticon.search(/[B8][-^v]?[)\]]/) != -1)
        type = "face-cool";
    else if (emoticon.search(/[=:;][~'][-^v]?\(/) != -1)
        type = "face-cry";
    else if (emoticon.search(/o[._]O|O[._]o/) != -1)
        type = "face-dizzy";
    else if (emoticon.search(/o[._]o|O[._]O/) != -1)
        type = "face-eek";
    else if (emoticon.search(/\>[=:;][-^v]?D/) != -1)
        type = "face-evil";
    else if (emoticon.search(/O[=:][-^v]?[)]/) != -1)
        type = "face-innocent";
    else if (emoticon.search(/[=:;][-^v]?[*]/) != -1)
        type = "face-kissing";
    else if (emoticon.search(/[=:;][-^v]?DD/) != -1)
        type = "face-lol";
    else if (emoticon.search(/[=:;][-^v]?D/) != -1)
        type = "face-laugh";
    else if (emoticon.search(/\([-^v]?D|[xX][-^v]?D/) != -1)
        type = "face-rofl";
    else if (emoticon.search(/[=:;][-^v]?\|/) != -1)
        type = "face-neutral";
    else if (emoticon.search(/[=:;][-^v]?\?/) != -1)
        type = "face-thinking";
    else if (emoticon.search(/[=:;]"[)\]]/) != -1)
        type = "face-red";
    else if (emoticon.search(/9[._]9/) != -1)
        type = "face-rolleyes";
    else if (emoticon.search(/[=:;][-^v]?[(\[]/) != -1)
        type = "face-sad";
    else if (emoticon.search(/[=:][-^v]?[)]/) != -1)
        type = "face-smile";
    else if (emoticon.search(/[=:;][-^v]?[0oO]/) != -1)
        type = "face-surprised";
    else if (emoticon.search(/[=:][-^v]?[\]]/) != -1)
        type = "face-sweat_smile";
    else if (emoticon.search(/[=:;][-^v]?[pP]/) != -1)
        type = "face-tongue";
    else if (emoticon.search(/;[-^v]?[)\]]/) != -1)
        type = "face-wink";
    else if (emoticon.search(/%[-^v][)\]]/) != -1)
        type = "face-woozy";
    else if (emoticon.search(/[=:;][-^v]?[\/\\]/) != -1)
        type = "face-worried";
    else if (emoticon.search(/[=:;][-^v]?[#]/) != -1)
        type = "face-zipped";

    let glyph = smilies[type];
    if (!glyph) {
        // We didn't actually match anything, so it'll be a too-generic match
        // from the munger RegExp.
        mungerEntry.enabled = false;
        client.munger.munge(emoticon, containerTag, eventData);
        mungerEntry.enabled = true;
        return;
    }

    // Add spaces to beginning / end where appropriate.
    if (emoticon.search(/^\s/) != -1)
        glyph = " " + glyph;
    if (emoticon.search(/\s$/) != -1)
        glyph = glyph + " ";

    // Create a span to hold the emoticon.
    let span = document.createElementNS(XHTML_NS, "html:span");
    span.appendChild(document.createTextNode(glyph));
    span.setAttribute("class", "chatzilla-emote-txt");
    // Add the title attribute (to show the original text in a tooltip) in case
    // the replacement was done incorrectly.
    span.setAttribute("title", emoticon);
    span.setAttribute("type", type);
    containerTag.appendChild(span);
}

function mircChangeColor (colorInfo, containerTag, data)
{
    /* If colors are disabled, the caller doesn't want colors specifically, or
     * the caller doesn't want any state-changing effects, we drop out.
     */
    if (!client.enableColors ||
        (("noMircColors" in data) && data.noMircColors) ||
        (("noStateChange" in data) && data.noStateChange))
    {
        return;
    }

    // Entry 0 will contain all colors specified,
    // entry 1 will have any specified foreground color or be undefined,
    // entry 2 will have any specified background color or be undefined.
    // Valid color codes are 0-99 with 99 having special meaning.
    let ary = colorInfo.match(/^\x03(?:(\d\d?)(?:,(\d\d?))?)?/);

    // If no foreground color specified or somehow the array does not have 3
    // entries then it has invalid syntax.
    if (ary.length != 3 || !ary[1]) {
        delete data.currFgColor;
        delete data.currBgColor;
        return;
    }

    let fgColor = Number(ary[1]);

    if (fgColor != 99) {
        data.currFgColor = (fgColor % 16).toString().padStart(2, "0");
    } else {
        delete data.currFgColor;
    }

    // If no background color then default to 99.
    let bgColor = Number(ary[2] || "99");

    if (bgColor != 99) {
        data.currBgColor = (bgColor % 16).toString().padStart(2, "0");
    } else {
        delete data.currBgColor;
    }

    // Only set hasColorInfo if we have something set.
    if (fgColor != 99 || bgColor != 99) {
        data.hasColorInfo = true;
    }
}

function mircToggleBold (colorInfo, containerTag, data)
{
    if (!client.enableColors ||
        (("noMircColors" in data) && data.noMircColors) ||
        (("noStateChange" in data) && data.noStateChange))
    {
        return;
    }

    if ("isBold" in data)
        delete data.isBold;
    else
        data.isBold = true;
    data.hasColorInfo = true;
}

function mircToggleUnder (colorInfo, containerTag, data)
{
    if (!client.enableColors ||
        (("noMircColors" in data) && data.noMircColors) ||
        (("noStateChange" in data) && data.noStateChange))
    {
        return;
    }

    if ("isUnderline" in data)
        delete data.isUnderline;
    else
        data.isUnderline = true;
    data.hasColorInfo = true;
}

function mircResetColor (text, containerTag, data)
{
    if (!client.enableColors ||
        (("noMircColors" in data) && data.noMircColors) ||
        (("noStateChange" in data) && data.noStateChange) ||
        !("hasColorInfo" in data))
    {
        return;
    }

    removeColorInfo(data);
}

function mircReverseColor (text, containerTag, data)
{
    if (!client.enableColors ||
        (("noMircColors" in data) && data.noMircColors) ||
        (("noStateChange" in data) && data.noStateChange))
    {
        return;
    }

    var tempColor = ("currFgColor" in data ? data.currFgColor : "");

    if ("currBgColor" in data)
        data.currFgColor = data.currBgColor;
    else
        delete data.currFgColor;
    if (tempColor)
        data.currBgColor = tempColor;
    else
        delete data.currBgColor;
    data.hasColorInfo = true;
}

function ansiEscapeSGR(text, containerTag, data)
{
    if (!client.enableColors ||
        (("noANSIColors" in data) && data.noANSIColors) ||
        (("noStateChange" in data) && data.noStateChange))
    {
        return;
    }

    /* ANSI SGR (Select Graphic Rendition) escape support. Matched text may
     * have any number of effects, each a number separated by a semicolon. If
     * there are no effects listed, it is treated as effect "0" (reset/normal).
     */

    text = text.substr(2, text.length - 3) || "0";

    const ansiToMircColor = [
        "01", "05", "03", "07", "02", "06", "10", "15",
        "14", "04", "09", "08", "12", "13", "11", "00"
    ];

    var effects = text.split(";");
    for (var i = 0; i < effects.length; i++)
    {
        data.hasColorInfo = true;

        switch (Number(effects[i]))
        {
            case 0: // Reset/normal.
                removeColorInfo(data);
                break;

            case 1: // Intensity: bold.
                data.isBold = true;
                break;

            case 3: // Italic: on.
                data.isItalic = true;
                break;

            case 4: // Underline: single.
                data.isUnderline = true;
                break;

            case 9: // Strikethrough: on.
                data.isStrikethrough = true;
                break;

            case 22: // Intensity: normal.
                delete data.isBold;
                break;

            case 23: // Italic: off.
                delete data.isItalic;
                break;

            case 24: // Underline: off.
                delete data.isUnderline;
                break;

            case 29: // Strikethrough: off.
                delete data.isStrikethrough;
                break;

            case 53: // Overline: on.
                data.isOverline = true;
                break;

            case 55: // Overline: off.
                delete data.isOverline;
                break;

            case 30: // FG: Black.
            case 31: // FG: Red.
            case 32: // FG: Green.
            case 33: // FG: Yellow.
            case 34: // FG: Blue.
            case 35: // FG: Magenta.
            case 36: // FG: Cyan.
            case 37: // FG: While (light grey).
                data.currFgColor = ansiToMircColor[effects[i] - 30];
                break;

            case 39: // FG: default.
                delete data.currFgColor;
                break;

            case 40: // BG: Black.
            case 41: // BG: Red.
            case 42: // BG: Green.
            case 43: // BG: Yellow.
            case 44: // BG: Blue.
            case 45: // BG: Magenta.
            case 46: // BG: Cyan.
            case 47: // BG: While (light grey).
                data.currBgColor = ansiToMircColor[effects[i] - 40];
                break;

            case 49: // BG: default.
                delete data.currBgColor;
                break;

            case 90: // FG: Bright Black (dark grey).
            case 91: // FG: Bright Red.
            case 92: // FG: Bright Green.
            case 93: // FG: Bright Yellow.
            case 94: // FG: Bright Blue.
            case 95: // FG: Bright Magenta.
            case 96: // FG: Bright Cyan.
            case 97: // FG: Bright While.
                data.currFgColor = ansiToMircColor[effects[i] - 90 + 8];
                break;

            case 100: // BG: Bright Black (dark grey).
            case 101: // BG: Bright Red.
            case 102: // BG: Bright Green.
            case 103: // BG: Bright Yellow.
            case 104: // BG: Bright Blue.
            case 105: // BG: Bright Magenta.
            case 106: // BG: Bright Cyan.
            case 107: // BG: Bright While.
                data.currBgColor = ansiToMircColor[effects[i] - 100 + 8];
                break;
        }
    }
}

function removeColorInfo(data)
{
    delete data.currFgColor;
    delete data.currBgColor;
    delete data.isBold;
    delete data.isItalic;
    delete data.isOverline;
    delete data.isStrikethrough;
    delete data.isUnderline;
    delete data.hasColorInfo;
}

function showCtrlChar(c, containerTag)
{
    var span = document.createElementNS(XHTML_NS, "html:span");
    span.setAttribute("class", "chatzilla-control-char");
    if (c == "\t")
    {
        containerTag.appendChild(document.createTextNode(c));
        return;
    }

    var ctrlStr = c.charCodeAt(0).toString(16);
    if (ctrlStr.length < 2)
        ctrlStr = "0" + ctrlStr;
    span.appendChild(document.createTextNode("0x" + ctrlStr));
    containerTag.appendChild(span);
    containerTag.appendChild(document.createElementNS(XHTML_NS, "html:wbr"));
}

function insertText(text, containerTag, data)
{
    var newClass = "";
    if (data && ("hasColorInfo" in data))
        newClass = calcClass(data);
    if (!newClass)
        delete data.hasColorInfo;

    if (newClass)
    {
        var spanTag = document.createElementNS(XHTML_NS, "html:span");
        spanTag.setAttribute("class", newClass);
        containerTag.appendChild(spanTag);
        containerTag = spanTag;
    }

    var arg;
    while ((arg = text.match(client.whitespaceRE)))
    {
        // Find the start of the match so we can insert the preceding text.
        var start = text.indexOf(arg[0]);
        if (start > 0)
            containerTag.appendChild(document.createTextNode(text.substr(0, start)));

        // Process the long word itself.
        insertHyphenatedWord(arg[1], containerTag, { dontStyleText: true });

        // Continue with the rest of the text.
        text = text.substr(start + arg[0].length);
    }

    // Insert any left-over text on the end.
    if (text)
        containerTag.appendChild(document.createTextNode(text));
}

function insertHyphenatedWord(longWord, containerTag, data)
{
    var wordParts = splitLongWord(longWord, client.MAX_WORD_DISPLAY);

    if (!data || !("dontStyleText" in data))
    {
        var newClass = "";
        if (data && ("hasColorInfo" in data))
            newClass = calcClass(data);
        if (!newClass)
            delete data.hasColorInfo;

        if (newClass)
        {
            var spanTag = document.createElementNS(XHTML_NS, "html:span");
            spanTag.setAttribute("class", newClass);
            containerTag.appendChild(spanTag);
            containerTag = spanTag;
        }
    }

    var wbr = document.createElementNS(XHTML_NS, "html:wbr");
    for (var i = 0; i < wordParts.length; ++i)
    {
        containerTag.appendChild(document.createTextNode(wordParts[i]));
        containerTag.appendChild(wbr.cloneNode(true));
    }
}

function insertInlineButton(text, containerTag, data)
{
    var ary = text.match(/\[\[([^\]]+)\]\[([^\]]+)\]\[([^\]]+)\]\]/);

    if (!ary)
    {
        containerTag.appendChild(document.createTextNode(text));
        return;
    }

    var label = ary[1];
    var title = ary[2];
    var command = ary[3];

    var link = document.createElementNS(XHTML_NS, "html:a");
    link.setAttribute("href", "x-cz-command:" + encodeURI(command));
    link.setAttribute("title", title);
    link.setAttribute("class", "chatzilla-link");
    link.appendChild(document.createTextNode(label));

    containerTag.appendChild(document.createTextNode("["));
    containerTag.appendChild(link);
    containerTag.appendChild(document.createTextNode("]"));
}

function calcClass(data)
{
    var className = "";
    if ("hasColorInfo" in data)
    {
        if ("currFgColor" in data)
            className += " chatzilla-fg" + data.currFgColor;
        if ("currBgColor" in data)
            className += " chatzilla-bg" + data.currBgColor;
        if ("isBold" in data)
            className += " chatzilla-bold";
        if ("isItalic" in data)
            className += " chatzilla-italic";
        if ("isOverline" in data)
            className += " chatzilla-overline";
        if ("isStrikethrough" in data)
            className += " chatzilla-strikethrough";
        if ("isUnderline" in data)
            className += " chatzilla-underline";
    }
    return className;
}