QA@IT

toLocaleDateStringを使うと、処理速度が重くなる。

4656 PV

下記のコードは、アナログ時計の外周を、画面をクリックするごとに
『英語表記のカレンダー』と『日本語表記のカレンダー』に切り替わる
ようにしたものです。
しかし『日本語表記のカレンダー』にはtoLocaleDateStringを使っているためか、
外周の移動速度(=step[設定は、0.03])が『英語表記のカレンダー』より遅いのです。
この差をなくすには、どうしたらいいでしょうか。

問題箇所は、スクリプトのfunction ClockAndAssign(){}内のif~elseです。

コード全体

<html>

<head>

    <meta charset="utf-8" />

    <title></title>

</head>

<body>

<div id="clock">
    <div id="Od" style="position:absolute;top:0px;left:0px">
        <div style="position:relative">
        </div>
    </div>
    <div id="Of" style="position:absolute;top:0px;left:0px">
        <div style="position:relative">
        </div>
    </div>
    <div id="Oh" style="position:absolute;top:0px;left:0px">
        <div style="position:relative">
        </div>
    </div>
    <div id="Om" style="position:absolute;top:0px;left:0px">
        <div style="position:relative">
        </div>
    </div>
    <div id="Os" style="position:absolute;top:0px;left:0px">
        <div style="position:relative">
        </div>
    </div>
</div>


<script type="text/javascript">


(function(){
    "use strict";

function $(sel)
{
    return document.getElementById(sel);
}

function $$(sel)
{
    if (typeof document.getElementsByClassName === 'undefined')
    {
        return document.getElementsByName(sel);
    }

    return document.getElementsByClassName(sel);
}


var dCol = '00ff00', //date colour.
    sCol = 'ff0000', //seconds colour.
    mCol = '000000', //minutes colour.
    hCol = '000000', //hours colour.
    fCol = '0000ff', //face color
    ClockHeight = 40,
    ClockWidth = 40,
    ClockFromMouseY = 0,
    ClockFromMouseX = 100;

var w = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
    m = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
    date = new Date(),
    week = w[date.getDay()],
    day = ("0" + date.getDate()).slice(-2),
    year = date.getYear() + 1900;

if((day == 1)||(day == 21)||(day == 31)){
day=day+ "st";
}
else if((day == 2)||(day == 22)){
day=day+ "nd";
}
else if((day == 3)||(day == 23)){
day=day+ "rd";
}
else{
day=day+ "th";
}
var TodaysDate =  "★" + " " + week + " " +  day + " " + m[date.getMonth()] + " " + year + " " + "★";

var D = TodaysDate.split('');
var H = '...';
    H = H.split('');
var M = '....';
    M = M.split('');
var S = '.....';
    S = S.split('');
var Face = '1 2 3 4 5 6 7 8 9 10 11 12',
    font = 'Helvetica, Arial, sans-serif',
    size = 1,
    speed = 0.6;
    Face = Face.split(' ');
var n = Face.length;
var a = size * 10;
var ymouse = 0,
    xmouse = 0,
    scrll = 0,
    props = '<span style="font-family:' + font + ';font-size:' + size + 'em; color:#' + fCol + '">',
    props2 = '<span style="font-family:' + font + ';font-size:' + size + 'em; color:#' + dCol + '">';
var Split = 360 / n;
var Dsplit = 360 / D.length;
var HandHeight = ClockHeight / 4.5; 
var HandWidth = ClockWidth / 4.5;
var HandY = -7,
    HandX = -2.5,
    step = 0.03,
    currStep = 0,
    y = [],
    x = [],
    Y = [],
    X = [],
    Dy = [],
    Dx = [],
    DY = [],
    DX = [];

var i;

for (i = 0; i < n; i++) 
{
    y[i] = 0;
    x[i] = 0;
    Y[i] = 0;
    X[i] = 0;
}

for (i = 0; i < D.length; i++) 
{
    Dy[i] = 0;
    Dx[i] = 0;
    DY[i] = 0;
    DX[i] = 0;
}

var wrapper = $('clock');
var html = '';

// Face wrapper
html = '';
for (i = 0; i < n; i++) 
{
    html += '<div class="Face" name="Face" style="position:absolute;top:0px;left:0;height:' + a + ';width:' + a + ';text-align:center">' + props + Face[i] + '</span></div>';
}
$('Of').children[0].innerHTML = html;

// Hours wrapper
html = '';
for (i = 0; i < H.length; i++)
{
    html += '<div class="Hours" name="Hours" style="position:absolute;width:16px;height:16px;font-family:Arial;font-size:16px;color:' + hCol + ';text-align:center;font-weight:bold">' + H[i] + '</div>';
} 
$('Oh').children[0].innerHTML = html;

// Minute wrapper
html = '';
for (i = 0; i < M.length; i++)
{
    html += '<div class="Minutes" name="Minutes" style="position:absolute;width:16px;height:16px;font-family:Arial;font-size:16px;color:' + mCol + ';text-align:center;font-weight:bold">' + M[i] + '</div>';
} 
$('Om').children[0].innerHTML = html;

// Seconds wrapper
html = '';
for (i = 0; i < S.length; i++)
{
    html += '<div class="Seconds" name="Seconds" style="position:absolute;width:16px;height:16px;font-family:Arial;font-size:16px;color:' + sCol + ';text-align:center;font-weight:bold">' + S[i] + '</div>';
} 
$('Os').children[0].innerHTML = html;

// Mouse move event handler
function Mouse(evnt) 
{
    if (typeof evnt === 'undefined')
    {
        ymouse = event.Y + ClockFromMouseY;
        xmouse = event.X + ClockFromMouseX;
    }
    else
    {
        ymouse = evnt.clientY + ClockFromMouseY;
        xmouse = evnt.clientX + ClockFromMouseX;
    }


}
document.onmousemove = Mouse;

function ClockAndAssign() 
{

if (vis){

var w = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
    m = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
    date = new Date(),
    week = w[date.getDay()],
    day = ("0" + date.getDate()).slice(-2),
    year = date.getYear() + 1900;

if((day == 1)||(day == 21)||(day == 31)){
day=day+ "st";
}
else if((day == 2)||(day == 22)){
day=day+ "nd";
}
else if((day == 3)||(day == 23)){
day=day+ "rd";
}
else{
day=day+ "th";
}
var TodaysDate =  "★" + " " + week + " " +  day + " " + m[date.getMonth()] + " " + year + " " + "★";
}

else{

var date = new Date(),
       m = new Array("①", "②", "③", "④", "⑤", "⑥", "⑦", "⑧", "⑨", "⑩", "⑪", "⑫"),
       d = new Array("①", "②", "③", "④", "⑤", "⑥", "⑦", "⑧", "⑨", "⑩", "⑪", "⑫", "⑬", "⑭", "⑮", "⑯", "⑰", "⑱", "⑲", "⑳", "㉑", "㉒", "㉓", "㉔", "㉕", "㉖", "㉗", "㉘", "㉙", "㉚", "㉛"),
       w = new Array("㊐", "㊋", "㊋", "㊌", "㊍", "㊎", "㊏"),

       month = m[date.getMonth()], 
       day = d[date.getDate()-1],
       week = w[date.getDay()];

var option = { year:'2-digit'};

var TodaysDate = "★" + " " + date.toLocaleDateString("ja-JP-u-ca-japanese", option).replace(/\u200e/g, "").replace(" ", "") + " " + month + "月" + day +"日" + " " + week + " " + "★";

}

var D = TodaysDate.split('');
var Dsplit = 360 / D.length;
var props2 = '<span style="font-family:' + font + ';font-size:' + size + 'em; color:#' + dCol + '">';

// Date wrapper
html = '';
for (i = 0; i < D.length; i++)
{
    html += '<div class="Date" name="Date" style="position:absolute;top:0px;left:0;height:' + a + ';width:' + a + ';text-align:center">' + props2 + D[i] + '</span></div>';
}
$('Od').children[0].innerHTML = html;


    var time = new Date();
    var secs = time.getSeconds();
    var sec = -1.57 + Math.PI * secs / 30;
    var mins = time.getMinutes();
    var min = -1.57 + Math.PI * mins / 30;
    var hr = time.getHours();
    var hrs = -1.575 + Math.PI * hr / 6 + Math.PI * parseInt(time.getMinutes(), 10) / 360;
    $('Od').style.top = window.document.body.scrollTop;
    $('Of').style.top = window.document.body.scrollTop;
    $('Oh').style.top = window.document.body.scrollTop;
    $('Om').style.top = window.document.body.scrollTop;
    $('Os').style.top = window.document.body.scrollTop;
    for (i = 0; i < n; i++)
    {
        var F = $$('Face')[i];
        F.style.top = y[i] + ClockHeight * Math.sin(-1.0471 + i * Split * Math.PI / 180) + scrll;
        F.style.left = x[i] + ClockWidth * Math.cos(-1.0471 + i * Split * Math.PI / 180);
    }
    for (i = 0; i < H.length; i++)
    {
        var HL = $$('Hours')[i];
        HL.style.top = y[i] + HandY + (i * HandHeight) * Math.sin(hrs) + scrll;
        HL.style.left = x[i] + HandX + (i * HandWidth) * Math.cos(hrs);
    }
    for (i = 0; i < M.length; i++)
    {
        var ML = $$('Minutes')[i].style;
        ML.top = y[i] + HandY + (i * HandHeight) * Math.sin(min) + scrll;
        ML.left = x[i] + HandX + (i * HandWidth) * Math.cos(min);
    }
    for (i = 0; i < S.length; i++)
    {
        var SL = $$('Seconds')[i].style;
        SL.top = y[i] + HandY + (i * HandHeight) * Math.sin(sec) + scrll;
        SL.left = x[i] + HandX + (i * HandWidth) * Math.cos(sec);
    }
    for (i = 0; i < D.length; i++)
    {
        var DL = $$('Date')[i].style;
        DL.top = Dy[i] + ClockHeight * 1.5 * Math.sin(currStep + i * Dsplit * Math.PI / 180) + scrll;
        DL.left = Dx[i] + ClockWidth * 1.5 * Math.cos(currStep + i * Dsplit * Math.PI / 180);
    }
    currStep -= step;
}

function Delay() 
{
    scrll = 0;
    Dy[0] = Math.round(DY[0] += ((ymouse) - DY[0]) * speed);
    Dx[0] = Math.round(DX[0] += ((xmouse) - DX[0]) * speed);
    for (i = 1; i < D.length; i++) {
        Dy[i] = Math.round(DY[i] += (Dy[i - 1] - DY[i]) * speed);
        Dx[i] = Math.round(DX[i] += (Dx[i - 1] - DX[i]) * speed);
    }
    y[0] = Math.round(Y[0] += ((ymouse) - Y[0]) * speed);
    x[0] = Math.round(X[0] += ((xmouse) - X[0]) * speed);
    for (i = 1; i < n; i++) {
        y[i] = Math.round(Y[i] += (y[i - 1] - Y[i]) * speed);
        x[i] = Math.round(X[i] += (x[i - 1] - X[i]) * speed);
    }
    ClockAndAssign();
    setTimeout(Delay, 20);
}
var vis=true;//スイッチ

function changeLang(){

  vis=!vis;

     if (vis){

        vis=true;

             }

     else   {

        vis=false;

             }
  }
window.onclick=changeLang;

Delay();

}());
</script>
</body>
</html>

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