mirror of
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vanceingallsandClaude Fable 5
5c2981d066
Two review findings on the caption-data runtime, applied to all 5 templates:
- hfValidate's version gate used Math.floor(Number(v)) > HF_CONTRACT_VERSION,
and Number("v2") is NaN — NaN comparisons are always false, so malformed
versions slid through with no unsupported-version signal. An explicit
Number.isFinite check closes it.
- hfBoot's sibling-fetch .then called hfAttach unconditionally; a manual
window.__HF_CAPTION_ATTACH__ call landing while the fetch or fonts.ready
was still pending got clobbered by the late boot payload. Boot now yields
if a timeline already exists.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
650 lines
24 KiB
HTML
Vendored
650 lines
24 KiB
HTML
Vendored
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=1920, height=1080" />
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<title>Weight Shift</title>
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<link rel="preconnect" href="https://fonts.googleapis.com" />
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
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<link
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href="https://fonts.googleapis.com/css2?family=Montserrat:wght@300;700&display=swap"
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rel="stylesheet"
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/>
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<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
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<style>
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*,
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*::before,
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*::after {
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box-sizing: border-box;
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}
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html,
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body {
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width: 1920px;
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height: 1080px;
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margin: 0;
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overflow: hidden;
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background: transparent;
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font-family: "Montserrat", Arial, sans-serif;
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}
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#weight-shift {
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pointer-events: none;
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position: relative;
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width: 1920px;
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height: 1080px;
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overflow: hidden;
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background: transparent;
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}
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.caption-layer {
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position: absolute;
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inset: 0;
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z-index: 20;
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pointer-events: none;
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transform: translateZ(0);
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}
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.safe-zone {
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position: absolute;
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bottom: 100px;
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left: 50%;
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transform: translateX(-50%);
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width: 1400px;
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height: 278px;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.caption-group {
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position: absolute;
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left: 0;
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top: 0;
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width: 1400px;
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height: 278px;
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display: flex;
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align-items: center;
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justify-content: center;
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opacity: 0;
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transform-origin: 50% 50%;
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will-change: transform;
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backface-visibility: hidden;
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}
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.caption-copy {
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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max-width: 1400px;
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text-align: center;
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}
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.caption-line {
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 12px;
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width: max-content;
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max-width: 1400px;
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line-height: 1.1;
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white-space: nowrap;
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color: var(--hf-caption-primary, #ffffff);
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font-family: "Montserrat", Arial, sans-serif;
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font-weight: 300;
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font-size: 72px;
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letter-spacing: -0.03em;
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text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
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text-transform: lowercase;
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}
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</style>
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</head>
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<body>
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<div
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id="weight-shift"
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data-composition-id="caption-weight-shift"
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data-timeline-locked
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data-start="0"
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data-duration="8"
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data-fps="30"
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data-width="1920"
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data-height="1080"
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>
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<div class="caption-layer" aria-hidden="true">
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<div id="caption-stage" class="safe-zone"></div>
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</div>
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</div>
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<script>
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// IIFE: keep every template's runtime private to itself so two caption
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// components pasted into one composition document can't clobber each
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// other's hfAttach/hfBuild via shared script-scope names (boot is async,
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// so collisions surface AFTER all scripts have executed).
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(function () {
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var HF_COMPOSITION_ID = "caption-weight-shift";
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var HF_ROOT_ID = "weight-shift";
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var HF_GROUP_SELECTOR = ".caption-group";
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var HF_DEMO_DATA = {
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version: 1,
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segments: [
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{
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start: 0,
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text: "Every great video starts with a single frame. HyperFrames lets you write HTML and render professional video. No timeline. No drag and drop. Just code that becomes cinema.",
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words: [
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{ text: "Every", start: 0.0, end: 0.3 },
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{ text: "great", start: 0.3, end: 0.55 },
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{ text: "video", start: 0.55, end: 0.85 },
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{ text: "starts", start: 0.85, end: 1.1 },
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{ text: "with", start: 1.1, end: 1.25 },
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{ text: "a", start: 1.25, end: 1.35 },
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{ text: "single", start: 1.35, end: 1.65 },
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{ text: "frame.", start: 1.65, end: 2.0 },
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{ text: "HyperFrames", start: 2.1, end: 2.65 },
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{ text: "lets", start: 2.65, end: 2.85 },
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{ text: "you", start: 2.85, end: 2.95 },
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{ text: "write", start: 2.95, end: 3.15 },
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{ text: "HTML", start: 3.15, end: 3.55 },
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{ text: "and", start: 3.55, end: 3.65 },
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{ text: "render", start: 3.65, end: 3.95 },
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{ text: "professional", start: 3.95, end: 4.45 },
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{ text: "video.", start: 4.45, end: 4.8 },
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{ text: "No", start: 4.9, end: 5.05 },
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{ text: "timeline.", start: 5.05, end: 5.45 },
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{ text: "No", start: 5.5, end: 5.65 },
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{ text: "drag", start: 5.65, end: 5.85 },
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{ text: "and", start: 5.85, end: 5.95 },
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{ text: "drop.", start: 5.95, end: 6.25 },
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{ text: "Just", start: 6.35, end: 6.55 },
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{ text: "code", start: 6.55, end: 6.8 },
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{ text: "that", start: 6.8, end: 6.95 },
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{ text: "becomes", start: 6.95, end: 7.3 },
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{ text: "cinema.", start: 7.3, end: 7.7 },
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],
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},
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],
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};
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/* ── HyperFrames caption-data runtime (shared across caption templates) ── */
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var HF_CONTRACT_VERSION = 1;
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var HF_DEFAULT_RESOLUTION = { width: 1920, height: 1080 };
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function hfFlattenSegments(segments) {
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var out = [];
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(segments || []).forEach(function (seg) {
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((seg && seg.words) || []).forEach(function (w) {
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var start = Math.max(0, Number(w.start) || 0);
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out.push({
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text: String(w.word || w.text || "").trim(),
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start: start,
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end: Math.max(start, Number(w.end) || 0),
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});
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});
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});
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out.sort(function (a, b) {
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return a.start - b.start;
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});
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return out.filter(function (w) {
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return w.text.length > 0;
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});
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}
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function hfDeriveDuration(words) {
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var end = 0;
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words.forEach(function (w) {
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if (w.end > end) end = w.end;
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});
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return end;
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}
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function hfValidate(data) {
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if (!data || typeof data !== "object") return { ok: false, reason: "not-an-object" };
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if (data.version != null) {
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// Number("v2") is NaN and NaN > x is always false — an explicit
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// finite check keeps malformed versions from slipping past the gate.
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var hfVersion = Number(data.version);
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if (!Number.isFinite(hfVersion) || Math.floor(hfVersion) > HF_CONTRACT_VERSION) {
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return { ok: false, reason: "unsupported-version" };
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}
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}
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if (!Array.isArray(data.segments) || data.segments.length === 0) {
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return { ok: false, reason: "no-segments" };
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}
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if (data.displayMode != null && data.displayMode !== "full") {
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return { ok: false, reason: "unsupported-displayMode" };
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}
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var words = hfFlattenSegments(data.segments);
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if (words.length === 0) return { ok: false, reason: "no-words" };
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return { ok: true, words: words, durationS: hfDeriveDuration(words) };
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}
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function hfApplyStageConfig(data, durationS) {
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var res = (data && data.resolution) || HF_DEFAULT_RESOLUTION;
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var W = Math.max(1, Math.round(Number(res.width) || HF_DEFAULT_RESOLUTION.width));
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var H = Math.max(1, Math.round(Number(res.height) || HF_DEFAULT_RESOLUTION.height));
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var root = document.getElementById(HF_ROOT_ID);
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[document.documentElement, document.body, root].forEach(function (el) {
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el.style.width = W + "px";
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el.style.height = H + "px";
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});
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root.setAttribute("data-width", String(W));
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root.setAttribute("data-height", String(H));
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root.setAttribute("data-duration", String(durationS));
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var brand = (data && data.brand) || {};
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if (typeof brand.primaryColor === "string" && brand.primaryColor) {
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root.style.setProperty("--hf-caption-primary", brand.primaryColor);
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} else {
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root.style.removeProperty("--hf-caption-primary");
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}
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if (typeof brand.accentColor === "string" && brand.accentColor) {
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root.style.setProperty("--hf-caption-accent", brand.accentColor);
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} else {
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root.style.removeProperty("--hf-caption-accent");
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}
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return {
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W: W,
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H: H,
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scaleX: W / 1920,
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scaleY: H / 1080,
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fontScale: Math.min(W, H) / 1080,
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};
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}
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function hfPublishStatus(status) {
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window.__HF_CAPTION_STATUS = status;
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document
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.getElementById(HF_ROOT_ID)
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.setAttribute("data-caption-status", status.ok ? "ok" : "failed");
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}
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function hfRunGate(words, durationS, failReason) {
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if (failReason) {
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hfPublishStatus({
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ok: false,
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present: false,
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contained: false,
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reason: failReason,
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version: HF_CONTRACT_VERSION,
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durationS: durationS || 0,
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});
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return;
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}
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var root = document.getElementById(HF_ROOT_ID);
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var rootRect = root.getBoundingClientRect();
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var groups = root.querySelectorAll(HF_GROUP_SELECTOR);
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var present = false;
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var contained = true;
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var tokens = [];
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words.forEach(function (w) {
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var t = w.text.toLowerCase().replace(/[^a-z0-9]/g, "");
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if (t) tokens.push(t);
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});
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groups.forEach(function (el) {
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var prevOpacity = el.style.opacity;
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var prevVisibility = el.style.visibility;
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el.style.opacity = "1";
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el.style.visibility = "visible";
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var r = el.getBoundingClientRect();
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if (r.width > 0 && r.height > 0) {
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var text = (el.textContent || "").toLowerCase();
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for (var i = 0; i < tokens.length; i++) {
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if (text.indexOf(tokens[i]) !== -1) {
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present = true;
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break;
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}
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}
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if (
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r.left < rootRect.left - 1 ||
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r.right > rootRect.right + 1 ||
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r.top < rootRect.top - 1 ||
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r.bottom > rootRect.bottom + 1
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) {
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contained = false;
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}
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}
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el.style.opacity = prevOpacity;
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el.style.visibility = prevVisibility;
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});
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hfPublishStatus({
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ok: present && contained,
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present: present,
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contained: contained,
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version: HF_CONTRACT_VERSION,
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durationS: durationS,
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});
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}
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var SAFE_ZONE_WIDTH, MAX_LINE_WIDTH, CAPTION_FONT_SIZE, DURATION;
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var MAX_WORDS_PER_GROUP = 4;
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var WORD_SPACING_DESIGN = 12;
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var WORD_SPACING;
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var PAUSE_THRESHOLD = 0.1;
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var ENTRY_DURATION = 100 / 1000;
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var WEIGHT_TRANSITION = 100 / 1000;
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var FONT_WIDTH_SAFETY = 1.14;
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var FONT_WEIGHT_LIGHT = 300;
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var FONT_WEIGHT_BOLD = 700;
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function normalizeWords(rawWords) {
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return rawWords
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.map(function (item) {
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return {
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text: String(item.word || item.text || "").trim(),
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start: Math.max(0, Number(item.start) || 0),
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end: Math.min(DURATION, Math.max(Number(item.start) || 0, Number(item.end) || 0)),
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};
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})
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.filter(function (word) {
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return word.text.length > 0;
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});
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}
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var _fitCanvas = document.createElement("canvas");
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var _fitCtx = _fitCanvas.getContext("2d");
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function fitFontSize(text, baseFontSize, fontWeight, fontFamily, maxWidth) {
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var size = baseFontSize;
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var minSize = Math.floor(baseFontSize * 0.45);
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while (size > minSize) {
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_fitCtx.font = fontWeight + " " + size + "px " + fontFamily;
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if (_fitCtx.measureText(text).width <= maxWidth) return size;
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size -= 2;
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}
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return minSize;
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}
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var measureCanvas = document.createElement("canvas");
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var measureContext = measureCanvas.getContext("2d");
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function measureWord(word) {
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return measureContext.measureText(word.text.toLowerCase()).width * FONT_WIDTH_SAFETY;
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}
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function measureLineWidth(words) {
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return words.reduce(function (total, word, index) {
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return total + measureWord(word) + (index ? WORD_SPACING : 0);
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}, 0);
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}
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function fitsInTwoLines(words) {
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return measureLineWidth(words) <= MAX_LINE_WIDTH * 1.8;
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}
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function splitLines(words) {
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if (words.length < 2) {
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return [{ words: words, startIndex: 0 }];
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}
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var bestSplit = Math.ceil(words.length / 2);
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var bestDiff = Infinity;
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for (var s = 1; s < words.length; s++) {
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var w1 = measureLineWidth(words.slice(0, s));
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var w2 = measureLineWidth(words.slice(s));
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if (w1 <= MAX_LINE_WIDTH && w2 <= MAX_LINE_WIDTH) {
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var diff = Math.abs(w1 - w2);
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if (diff < bestDiff) {
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bestDiff = diff;
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bestSplit = s;
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}
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}
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}
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var result = [];
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var line1 = words.slice(0, bestSplit);
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var line2 = words.slice(bestSplit);
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if (line1.length) result.push({ words: line1, startIndex: 0 });
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if (line2.length) result.push({ words: line2, startIndex: line1.length });
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return result;
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}
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function avoidSingleWordGroups(groups) {
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var out = [];
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groups.forEach(function (group) {
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if (
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group.words.length === 1 &&
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out.length > 0 &&
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out[out.length - 1].words.length < MAX_WORDS_PER_GROUP
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) {
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out[out.length - 1] = makeGroup(out[out.length - 1].words.concat(group.words));
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} else {
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out.push(group);
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}
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});
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for (var i = 0; i < out.length; i++) {
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if (out[i].words.length !== 1) continue;
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if (i + 1 < out.length && out[i + 1].words.length < MAX_WORDS_PER_GROUP) {
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out[i] = makeGroup(out[i].words.concat(out[i + 1].words));
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out.splice(i + 1, 1);
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} else if (i > 0 && out[i - 1].words.length < MAX_WORDS_PER_GROUP) {
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out[i - 1] = makeGroup(out[i - 1].words.concat(out[i].words));
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out.splice(i, 1);
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i--;
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}
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}
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return out;
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}
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function makeGroups(words) {
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var groups = [];
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var current = [];
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words.forEach(function (word, index) {
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var nextWord = words[index + 1];
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var testGroup = current.concat([word]);
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if (testGroup.length > MAX_WORDS_PER_GROUP || !fitsInTwoLines(testGroup)) {
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if (current.length) groups.push(makeGroup(current));
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current = [word];
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return;
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}
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current.push(word);
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var punctuation = /[,.:!?]$/.test(word.text);
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var pause = nextWord ? nextWord.start - word.end : 0;
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if (
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!nextWord ||
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punctuation ||
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pause >= PAUSE_THRESHOLD ||
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current.length >= MAX_WORDS_PER_GROUP
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) {
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groups.push(makeGroup(current));
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current = [];
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}
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});
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if (current.length) groups.push(makeGroup(current));
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return avoidSingleWordGroups(groups);
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}
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function makeGroup(words) {
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return {
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words: words.slice(),
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lines: splitLines(words),
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start: words[0].start,
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end: words[words.length - 1].end,
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};
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}
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function buildCaptions(groups) {
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var stage = document.getElementById("caption-stage");
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groups.forEach(function (group, groupIndex) {
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var groupText = group.words
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.map(function (w) {
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return w.text.toLowerCase();
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})
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.join(" ");
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var computedSize = fitFontSize(
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groupText,
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CAPTION_FONT_SIZE,
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"700",
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"Montserrat",
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MAX_LINE_WIDTH,
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);
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var groupEl = document.createElement("div");
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var copyEl = document.createElement("div");
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groupEl.id = "caption-group-" + groupIndex;
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groupEl.className = "caption-group";
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copyEl.className = "caption-copy";
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group.lines.forEach(function (line, lineIndex) {
|
|
var lineEl = document.createElement("div");
|
|
lineEl.className = "caption-line";
|
|
lineEl.id = "caption-group-" + groupIndex + "-line-" + lineIndex;
|
|
lineEl.style.fontWeight = lineIndex === 0 ? FONT_WEIGHT_BOLD : FONT_WEIGHT_LIGHT;
|
|
lineEl.style.fontSize = computedSize + "px";
|
|
lineEl.style.maxWidth = SAFE_ZONE_WIDTH + "px";
|
|
line.words.forEach(function (word, wordIndex) {
|
|
var wordEl = document.createElement("span");
|
|
wordEl.textContent = word.text.toLowerCase();
|
|
wordEl.style.display = "inline-block";
|
|
lineEl.appendChild(wordEl);
|
|
});
|
|
copyEl.appendChild(lineEl);
|
|
});
|
|
groupEl.appendChild(copyEl);
|
|
stage.appendChild(groupEl);
|
|
});
|
|
}
|
|
|
|
function hfTeardown() {
|
|
document.getElementById("caption-stage").innerHTML = "";
|
|
}
|
|
|
|
function hfBuild(words, layout, durationS) {
|
|
DURATION = durationS;
|
|
CAPTION_FONT_SIZE = Math.round(72 * layout.fontScale);
|
|
SAFE_ZONE_WIDTH = Math.round(1400 * layout.scaleX);
|
|
MAX_LINE_WIDTH = SAFE_ZONE_WIDTH - Math.round(40 * layout.scaleX);
|
|
WORD_SPACING = Math.round(WORD_SPACING_DESIGN * layout.fontScale);
|
|
|
|
var stage = document.getElementById("caption-stage");
|
|
var stageHeight = Math.round(278 * layout.fontScale);
|
|
stage.style.width = SAFE_ZONE_WIDTH + "px";
|
|
stage.style.height = stageHeight + "px";
|
|
stage.style.bottom = Math.round(100 * layout.scaleY) + "px";
|
|
|
|
measureContext.font = "700 " + CAPTION_FONT_SIZE + "px Montserrat";
|
|
|
|
var WORDS = normalizeWords(words);
|
|
var GROUPS = makeGroups(WORDS);
|
|
buildCaptions(GROUPS);
|
|
// set per-group sizing to match the runtime stage
|
|
GROUPS.forEach(function (_, i) {
|
|
var el = document.getElementById("caption-group-" + i);
|
|
el.style.width = SAFE_ZONE_WIDTH + "px";
|
|
el.style.height = stageHeight + "px";
|
|
});
|
|
|
|
var tl = gsap.timeline({ paused: true });
|
|
|
|
var visibleStarts = GROUPS.map(function (group, groupIndex) {
|
|
var prev = GROUPS[groupIndex - 1];
|
|
var availableGap = prev ? Math.max(0, group.start - prev.end) : ENTRY_DURATION;
|
|
var entryLead = Math.min(ENTRY_DURATION, availableGap);
|
|
return Math.max(0, group.start - entryLead);
|
|
});
|
|
|
|
var allGroupEls = GROUPS.map(function (_, i) {
|
|
return document.getElementById("caption-group-" + i);
|
|
});
|
|
|
|
GROUPS.forEach(function (group, groupIndex) {
|
|
var groupEl = allGroupEls[groupIndex];
|
|
var visibleStart = visibleStarts[groupIndex];
|
|
var visibleEnd =
|
|
groupIndex < GROUPS.length - 1 ? visibleStarts[groupIndex + 1] : DURATION;
|
|
|
|
// Each group already owns its full opacity lifecycle (set 0 at its
|
|
// own visibleStart, animated to 1, then set back to 0 at its own
|
|
// visibleEnd below), and groups occupy non-overlapping windows, so
|
|
// explicitly hiding every OTHER group here was redundant and made
|
|
// timeline construction O(groups^2) — this collapsed under dense
|
|
// stress transcripts (many short groups). Removed; behavior is
|
|
// unchanged (verified against templates.test.ts).
|
|
|
|
tl.set(groupEl, { opacity: 0, scale: 0.85 }, visibleStart);
|
|
tl.to(
|
|
groupEl,
|
|
{ opacity: 1, scale: 1, duration: ENTRY_DURATION, ease: "power3.out", force3D: true },
|
|
visibleStart,
|
|
);
|
|
|
|
if (group.lines.length === 2) {
|
|
var line1El = document.getElementById("caption-group-" + groupIndex + "-line-0");
|
|
var line2El = document.getElementById("caption-group-" + groupIndex + "-line-1");
|
|
var line2FirstWord = group.lines[1].words[0];
|
|
var switchTime = line2FirstWord.start;
|
|
|
|
tl.to(
|
|
line1El,
|
|
{ fontWeight: FONT_WEIGHT_LIGHT, duration: WEIGHT_TRANSITION, ease: "power2.out" },
|
|
switchTime,
|
|
);
|
|
tl.to(
|
|
line2El,
|
|
{ fontWeight: FONT_WEIGHT_BOLD, duration: WEIGHT_TRANSITION, ease: "power2.out" },
|
|
switchTime,
|
|
);
|
|
}
|
|
|
|
tl.set(groupEl, { opacity: 0 }, visibleEnd);
|
|
});
|
|
|
|
return tl;
|
|
}
|
|
|
|
var hfCurrentTimeline = null;
|
|
|
|
function hfAttach(data) {
|
|
var v = hfValidate(data);
|
|
if (!v.ok) {
|
|
hfRunGate([], 0, v.reason);
|
|
return;
|
|
}
|
|
if (hfCurrentTimeline) {
|
|
hfCurrentTimeline.kill();
|
|
hfCurrentTimeline = null;
|
|
}
|
|
hfTeardown();
|
|
var layout = hfApplyStageConfig(data, v.durationS);
|
|
var tl = hfBuild(v.words, layout, v.durationS);
|
|
tl.set({}, {}, v.durationS); // pin timeline length to the data-derived duration
|
|
// GSAP quirk (confirmed 3.14.2): a fresh timeline already reports position 0,
|
|
// so seek(0) is treated as a no-op and skips rendering .set() calls scheduled
|
|
// at t=0 — the first frame would show pre-timeline CSS defaults (usually
|
|
// hidden). render(time, suppressEvents, force) with force=true bypasses that.
|
|
tl.render(0, true, true);
|
|
hfCurrentTimeline = tl;
|
|
window.__timelines = window.__timelines || {};
|
|
window.__timelines[HF_COMPOSITION_ID] = tl;
|
|
hfRunGate(v.words, v.durationS, null);
|
|
}
|
|
window.__HF_CAPTION_ATTACH__ = hfAttach;
|
|
|
|
(function hfBoot() {
|
|
function start(data) {
|
|
var ready =
|
|
document.fonts && document.fonts.ready ? document.fonts.ready : Promise.resolve();
|
|
ready.then(function () {
|
|
// A manual window.__HF_CAPTION_ATTACH__ call that lands while the
|
|
// sibling fetch / fonts.ready are still pending must win — never
|
|
// clobber it with the late-arriving boot payload.
|
|
if (hfCurrentTimeline) return;
|
|
hfAttach(data);
|
|
});
|
|
}
|
|
if (window.__HF_CAPTION__) {
|
|
start(window.__HF_CAPTION__);
|
|
return;
|
|
}
|
|
fetch("./caption-data.json")
|
|
.then(function (r) {
|
|
return r.ok ? r.json() : null;
|
|
})
|
|
.catch(function () {
|
|
return null;
|
|
})
|
|
.then(function (json) {
|
|
start(json || HF_DEMO_DATA);
|
|
});
|
|
})();
|
|
})();
|
|
</script>
|
|
</body>
|
|
</html>
|