120 lines
4.1 KiB
HTML
120 lines
4.1 KiB
HTML
CTYPE HTML>
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<html>
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<head>
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<meta charset="utf8" />
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<title>Salience</title>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/11.8.0/math.js" integrity="sha512-VW8/i4IZkHxdD8OlqNdF7fGn3ba0+lYqag+Uy4cG6BtJ/LIr8t23s/vls70pQ41UasHH0tL57GQfKDApqc9izA==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
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<style>
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body {
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display: flex;
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flex-direction: column;
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height: 100vh;
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margin: 0;
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}
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p {
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width: 700px;
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margin: 1em auto;
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color: #4d4d4d;
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font-family: sans-serif;
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font-size: 15px;
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line-height: 1.33em;
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flex: 1;
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overflow-y: scroll;
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}
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h1 {
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width: 700px;
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text-align: left;
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margin: 15px auto;
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margin-bottom: 0;
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color: #000;
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font-family: sans-serif;
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font-size: 24px;
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}
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h1 span {
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display: block;
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font-size: 0.7em;
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font-weight: normal;
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color: #a0a0a0;
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}
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span.sentence {
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--salience: 1;
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background-color: rgba(249, 239, 104, var(--salience));
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}
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span.highlight {
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background-color: rgb(185, 225, 244);
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}
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::selection {
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background: transparent;
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}
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</style>
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</head>
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<body>
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<h1>
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Salience
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<span>automatic sentence highlights based on their significance to the document</span>
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</h1>
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<p id="content"></p>
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<script type="text/javascript">
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const content = document.querySelector('#content')
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let adjacency = null
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function scale(score) {
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return Math.max(0, Math.min(1, score ** 3 - 0.95))
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}
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let exponent = 5
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const redraw = () => {
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if (!adjacency) return
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const sentences = document.querySelectorAll('span.sentence')
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if (!window.getSelection().isCollapsed) {
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const sel = window.getSelection()
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const fromNode = sel.anchorNode.parentNode
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const toNode = sel.extentNode.parentNode
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const fromIdx = Array.from(sentences).indexOf(fromNode)
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const toIdx = Array.from(sentences).indexOf(toNode)
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const range = [fromIdx, toIdx]
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console.log('range', range)
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range.sort((a, b) => a - b)
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const vec = adjacency.map((x, i) => (i >= range[0] && i <= range[1]) ? 1 : 0)
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const vec_sum = vec.reduce((a, x) => a + x, 0)
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const scores = math.multiply(vec, adjacency).map(x => x * adjacency.length / vec_sum)
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Array.from(sentences).forEach((node, i) => {
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node.style.setProperty('--salience', scale(scores[i]))
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if (i >= range[0] && i <= range[1]) node.classList.add('highlight')
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else node.classList.remove('highlight')
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})
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} else {
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const initial = adjacency.map(() => 1)
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const scores = math.multiply(initial, math.pow(adjacency, exponent))
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Array.from(sentences).forEach((node, i) => {
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node.style.setProperty('--salience', scale(scores[i]))
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node.classList.remove('highlight')
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})
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}
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}
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// Disabled functionality to center highlights on a selected fragment
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// document.addEventListener('mousemove', redraw)
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// document.addEventListener('mouseup', redraw)
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fetch('/salience').then(async res => {
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const data = await res.json()
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console.log(data)
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const source = data.source
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const intervals = data.intervals
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const tokens = intervals.map(([start, end]) => source.substr(start, end - start))
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adjacency = data.adjacency
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tokens.forEach((t, i) => {
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const token = document.createElement('span')
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token.innerText = t
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token.classList.add('sentence')
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content.appendChild(token)
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if (tokens[i+1] && intervals[i+1][0] > intervals[i][1]) {
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const intervening = document.createElement('span')
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const start = intervals[i][1]
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intervening.innerText = source.substr(start, intervals[i+1][0] - start)
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content.appendChild(intervening)
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}
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})
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redraw()
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})
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</script>
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</body>
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</html>
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