同じ属性が設定されている要素に、スタイルシートで別のスタイルを設定するには？
下記のソースコードは、data-theme属性によりスタイルを切り替えている物です。
時計と、それに色を付けるためのボタンがあるのですが、
"ボタンの背景色＝時計の色"のため<style>の[data-theme]の"color"を
"background-color"と同じにしました。
しかし、そうすると今度はボタンの中の文字色も同じになるため、その文字が
消えてしまいます。
ここの矛盾を解決するにはどうしたらいいか、ご教示ください。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=shift_jis">
<meta charset="utf-8" />
<title></title>
<style>
[data-theme="black"]{ color: black; background-color:black;}
[data-theme="blue"]{ color: blue; background-color:blue;}
[data-theme="silver"]{ color: silver; background-color:silver;}
[data-theme="white"]{ color: white; background-color:white;}
</style>
</head>
<body id="back" data-theme="silver">
<button onclick="clock.hidden = !clock.hidden; event.target.textContent = clock.hidden ? 'Show' : 'Hide'; match_theme();" data-theme="white">Hide</button>
<br>
<button data-theme="black" onclick="set_theme([back], 'black'); match_theme();">Black</button>
<button data-theme="blue" onclick="set_theme([back], 'blue'); match_theme();">Blue</button>
<button data-theme="silver" onclick="set_theme([back], 'silver'); match_theme();">Silver</button>
<br>
Clock:
<select id="clock_setter" data-theme="blue" autocomplete="off"
onchange="set_theme(clock_parts, get_theme(event));">
<option data-theme="black">Clock</option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver</option>
<option id="clock_setter_none" data-theme="white" hidden>--C--</option>
</select>
Date:
<select id="date_setter" data-theme="blue" autocomplete="off"
onchange="set_theme([Od],get_theme(event));">
<option data-theme="black"> Black </option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver </option>
</select>
Face:
<select id="face_setter" data-theme="blue" autocomplete="off"
onchange="set_theme([Of],get_theme(event));">
<option data-theme="black"> Black </option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver </option>
</select>
Hours:
<select id="hour_setter" data-theme="blue" autocomplete="off"
onchange="set_theme([Oh],get_theme(event));">
<option data-theme="black"> Black </option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver </option>
</select>
Minutes:
<select id="minute_setter" data-theme="blue" autocomplete="off"
onchange="set_theme([Om],get_theme(event));">
<option data-theme="black"> Black </option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver </option>
</select>
Seconds:
<select id="second_setter" data-theme="blue" autocomplete="off"
onchange="set_theme([Os],get_theme(event));">
<option data-theme="black"> Black </option>
<option data-theme="blue" selected> Blue </option>
<option data-theme="silver"> Silver </option>
</select>
</body>
<div id="clock">
<div id="Od" data-theme="blue" style="position:absolute;top:0px;left:0px">
<div style="position:relative">
</div>
</div>
<div id="Of" data-theme="blue" style="position:absolute;top:0px;left:0px">
<div style="position:relative">
</div>
</div>
<div id="Oh" data-theme="blue" style="position:absolute;top:0px;left:0px">
<div style="position:relative">
</div>
</div>
<div id="Om" data-theme="blue" style="position:absolute;top:0px;left:0px">
<div style="position:relative">
</div>
</div>
<div id="Os" data-theme="blue" 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 = '', //date colour.
sCol = '', //seconds colour.
mCol = '', //minutes colour.
hCol = '', //hours colour.
fCol = '', //face color
ClockHeight = 40,
ClockWidth = 40,
ClockFromMouseY = 0,
ClockFromMouseX = 100,
d = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
m = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
date = new Date(),
day = date.getDate(),
year = date.getYear() + 1900;
var TodaysDate = " " + d[date.getDay()] + " " + 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 = 0.06,
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 = ''
// 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;
// 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()
{
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);
}
Delay();
}());
</script>
<script type="text/javascript">
"use strict";
var clock_parts = [Od, Of, Oh, Om, Os];
var clock_part_setters = [date_setter, face_setter, hour_setter, minute_setter, second_setter];
function for_each(array,func){Array.prototype.forEach.call(array,func);}
function get_theme(event){return event.target.options[event.target.selectedIndex].dataset.theme;
}
function select_option(select_elm,theme){select_elm.dataset.theme = theme;
// IE hack
select_elm.className = select_elm.className;
for_each(select_elm.options, function(option_elm){
if(option_elm.dataset.theme == theme){
option_elm.selected = true;
}
});
}
function set_theme(elms,theme){
for_each(elms, function(elm){
elm.dataset.theme = theme;
// IE hack
elm.className = elm.className;
});
// update clock_part_setters
for_each(clock_parts,function(part,i){
select_option(clock_part_setters[i],part.dataset.theme);
});
// update clock_setter
var is_same_theme = clock_parts.every(function(part){
return part.dataset.theme == clock_parts[0].dataset.theme;
});
if(is_same_theme){
clock_setter_none.hidden = true;
select_option(clock_setter,clock_parts[0].dataset.theme);
}
else{
clock_setter_none.hidden = false;
select_option(clock_setter,"white");
}
}
function match_theme(){
var theme_table = {
// back_theme: "clock_theme",
black: "silver",
blue: "black",
silver: "blue",
};
set_theme(clock_parts, theme_table[back.dataset.theme]);
}
</script>
</body>
</html>