~azzar1/unity/add-show-desktop-key

var magic = 'xyzzy';

function historyUp()

{

    if (this.cursor >= 0)

    {

        this.cursor--;

    }

}

function historyDown()

{

    if (this.cursor < this.items.length)

    {

        this.cursor++;

    }

}

function historyCurr()

{

    if (this.cursor < 0 || this.cursor >= this.items.length)

    {

        return "";

    }

    return this.items[this.cursor];

}

function historyAdd(text)

{

    this.items[this.items.length] = text;

    this.cursor = this.items.length;

}

function historyShow()

{

    var res = "";

    if (this.cursor == -1)

    {

        res += "[]";

    }

    for (var i = 0; i < this.items.length; i++)

    {

        if (i == this.cursor)

        {

            res += "["

        }

        res += this.items[i].toString();

        if (i == this.cursor)

        {

            res += "]"

        }

        res += " "

    }

    if (this.cursor == this.items.length)

    {

        res += "[]";

    }

    return res;

}

function History()

{

    this.items = new Array();

    this.cursor = -1;

    this.up = historyUp;

    this.down = historyDown;

    this.curr = historyCurr;

    this.add = historyAdd;

    this.show = historyShow;

}

var hist = new History();

function make_post_body(args)

{

    var qs = '';

    for (key in args)

    {

        vals = args[key];

        // vals can be an array, to make multiple args with the same name

        // To handle this, make non-array objects into an array, then loop

        if (!(vals instanceof Array))

            vals = [vals];

        var i;

        for (i=0; i<vals.length; i++)

        {

            if (i > 0)

            {

                qs += "&";

            }

            qs += encodeURIComponent(key) + "=" + encodeURIComponent(vals[i]);

        }

    }

    return qs;

}

function enter_line()

{

    var inp = document.getElementById('inputText');

    var digest = hex_md5(inp.value + magic);

    var xmlhttp = new XMLHttpRequest();

    xmlhttp.open("POST", "chat", false);

    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

    xmlhttp.send(make_post_body({"digest":digest, "text":inp.value}))

    var res = JSON.parse(xmlhttp.responseText);

    var output = document.getElementById("output");

    {

        var pre = document.createElement("pre");

        pre.setAttribute("class", "inputMsg");

        pre.appendChild(document.createTextNode(inp.value + "\n"));

        output.appendChild(pre);

    }

    if (res.hasOwnProperty('okay'))

    {

        // Success!

        // print out the output (res.okay[0])

        var pre = document.createElement("pre");

        pre.setAttribute("class", "outputMsg");

        pre.appendChild(document.createTextNode(res.okay[0]));

        output.appendChild(pre);

        // print out the return value (res.okay[1])

        if (res.okay[1])

        {

            var pre = document.createElement("pre");

            pre.setAttribute("class", "outputMsg");

            pre.appendChild(document.createTextNode(res.okay[1] + "\n"));

            output.appendChild(pre);

        }

        // set the prompt to >>>

        var prompt = document.getElementById("prompt");

        prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);

    }

    else if (res.hasOwnProperty('exc'))

    {

        // Failure!

        // print out the error message (res.exc)

        var pre = document.createElement("pre");

        pre.setAttribute("class", "errorMsg");

        pre.appendChild(document.createTextNode(res.exc));

        output.appendChild(pre);

    }

    else if (res.hasOwnProperty('more'))

    {

        // Need more input, so set the prompt to ...

        var prompt = document.getElementById("prompt");

        prompt.replaceChild(document.createTextNode("... "), prompt.firstChild);

    }

    else {

        // assert res.hasOwnProperty('input')

        var prompt = document.getElementById("prompt");

        prompt.replaceChild(document.createTextNode("+++ "), prompt.firstChild);

    }

}

function catch_input(key)

{

    var inp = document.getElementById('inputText');

    if (key == 13)

    {

        enter_line();

        hist.add(inp.value);

        inp.value = hist.curr();

    }

    if (key == 38)

    {

        hist.up();

        inp.value = hist.curr();

    }

    if (key == 40)

    {

        hist.down();

        inp.value = hist.curr();

    }

}