Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | import React, { useCallback, useEffect, useState } from "react";
import ReactGA from "react-ga4";
import { useSpeechSynthesis } from "./hooks/useSpeechSynthesis";
import type { TextToSpeechProps } from "./types";
import * as style from "./index.module.scss";
const TextToSpeech: React.FC<TextToSpeechProps> = ({
text,
lang = "auto",
ariaLabel = "記事読み上げ",
}) => {
const {
status,
rate,
isSupported,
error,
speak,
pause,
resume,
stop,
setRate,
} = useSpeechSynthesis();
// SSR対応: クライアント側でのみisSupported を評価
const [mounted, setMounted] = useState(false);
useEffect(() => {
setMounted(true);
}, []);
const handlePlayPause = useCallback(() => {
if (status === "idle" || status === "loading") {
speak(text, lang === "auto" ? undefined : `${lang}-JP`);
ReactGA.event({
category: "TextToSpeech",
action: "Start",
});
} else if (status === "playing") {
pause();
ReactGA.event({
category: "TextToSpeech",
action: "Pause",
});
} else if (status === "paused") {
resume();
ReactGA.event({
category: "TextToSpeech",
action: "Resume",
});
}
}, [status, text, lang, speak, pause, resume]);
const handleStop = useCallback(() => {
stop();
ReactGA.event({
category: "TextToSpeech",
action: "Stop",
});
}, [stop]);
const handleRateChange = useCallback(
(e: React.ChangeEvent<HTMLInputElement>) => {
setRate(parseFloat(e.target.value));
},
[setRate],
);
const getPlayPauseIcon = () => {
switch (status) {
case "loading":
return "⏳";
case "playing":
return "⏸";
default:
return "▶";
}
};
const getPlayPauseLabel = () => {
switch (status) {
case "loading":
return "読み込み中...";
case "playing":
return "一時停止";
case "paused":
return "再開";
default:
return "読み上げ開始";
}
};
// SSRとブラウザ非対応時は何も表示しない
if (!mounted || !isSupported) {
return null;
}
return (
<div
className={style["text-to-speech"]}
role="region"
aria-label={ariaLabel}
data-testid="text-to-speech"
>
<div className={style.controls}>
<button
type="button"
className={style["play-button"]}
onClick={handlePlayPause}
disabled={status === "loading"}
aria-label={getPlayPauseLabel()}
data-testid="play-pause-button"
>
<span aria-hidden="true">{getPlayPauseIcon()}</span>
</button>
{(status === "playing" || status === "paused") && (
<button
type="button"
className={style["stop-button"]}
onClick={handleStop}
aria-label="停止"
data-testid="stop-button"
>
<span aria-hidden="true">⏹</span>
</button>
)}
<div className={style["rate-control"]}>
<label htmlFor="speech-rate" className={style["rate-label"]}>
速度: {rate.toFixed(1)}x
</label>
<input
id="speech-rate"
type="range"
min="0.5"
max="2.0"
step="0.1"
value={rate}
onChange={handleRateChange}
className={style["rate-slider"]}
aria-label="読み上げ速度"
data-testid="rate-slider"
/>
</div>
</div>
{error && (
<div className={style.error} role="alert" data-testid="error-message">
{error}
</div>
)}
</div>
);
};
export default TextToSpeech;
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