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Implement read-along directive with audio synchronization and TTS support #1030

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Implement read-along directive with audio synchronization and TTS support #1030

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381ef47
Initial plan
Copilot Nov 6, 2025
810c7be
Add read-along directive implementation
Copilot Nov 6, 2025
b0a15c5
Address code review feedback - improve text extraction and fix CSS/JS…
Copilot Nov 6, 2025
9c6a318
Add read-along directive documentation to website
Copilot Nov 6, 2025
f9617b4
Fix text shifting by removing bold font-weight from active word highl…
Copilot Nov 6, 2025
3b9f2b7
Add TTS mode to read-along directive
Copilot Nov 6, 2025
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542 changes: 542 additions & 0 deletions packages/markdown/assets/directive-readalong/client.js
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93 changes: 93 additions & 0 deletions packages/markdown/assets/directive-readalong/style.css
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Original file line number Diff line number Diff line change
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.directive-readalong {
margin-bottom: 16px;
border-radius: 8px;
border: 1px solid var(--color-nav-border);
background-color: var(--color-nav);
padding: 16px;
}

.directive-readalong .readalong-controls {
display: flex;
align-items: center;
gap: 12px;
margin-bottom: 16px;
padding-bottom: 12px;
border-bottom: 1px solid var(--color-nav-border);
}

.directive-readalong .play-pause {
width: 48px;
height: 48px;
border: none;
border-radius: 50%;
cursor: pointer;
transition: transform 0.2s, background-color 0.2s;
mask-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 -960 960 960" fill="currentColor"><path d="M320-203v-560l440 280-440 280Z"></path></svg>');
mask-size: 28px;
mask-position: center;
mask-repeat: no-repeat;
background-color: var(--color-text);
}

.directive-readalong .play-pause:hover {
transform: scale(1.05);
opacity: 0.9;
}

.directive-readalong .play-pause.playing {
mask-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 -960 960 960" fill="currentColor"><path d="M555-200v-560h175v560H555Zm-325 0v-560h175v560H230Z"></path></svg>');
}

.directive-readalong .time-display {
font-size: 14px;
font-family: monospace;
color: var(--color-text);
opacity: 0.8;
}

.directive-readalong .readalong-text {
line-height: 1.8;
font-size: 16px;
color: var(--color-text);
user-select: none;
}

.directive-readalong .readalong-word {
display: inline;
padding: 2px 1px;
border-radius: 3px;
transition: background-color 0.2s, color 0.2s;
}

.directive-readalong .readalong-word:hover {
background-color: var(--color-primary);
color: var(--color-text-on-primary);
opacity: 0.7;
}

.directive-readalong .readalong-word.active {
background-color: var(--color-primary);
color: var(--color-text-on-primary);
box-shadow: 0 0 0 2px var(--color-primary);
}

.directive-readalong .readalong-audio {
display: none;
}

.directive-readalong .readalong-config {
display: none;
}

/* Ensure proper spacing in text content */
.directive-readalong .readalong-text p {
margin: 0.5em 0;
}

.directive-readalong .readalong-text p:first-child {
margin-top: 0;
}

.directive-readalong .readalong-text p:last-child {
margin-bottom: 0;
}
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