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Revert "feat(registry): the video-primitive moves, documented and customisable (#3090)" (#3162)

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This reverts commit 3b53bfd2f7.
This commit is contained in:
Miguel Ángel
2026-08-10 14:47:47 -04:00
committed by GitHub
parent 3b53bfd2f7
commit c86d4013f5
2328 changed files with 5906 additions and 458525 deletions
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registry/components/caption-weight-shift/caption-weight-shift.html
Vendored
+541 -254
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@@ -90,7 +90,7 @@
max-width: 1400px;
line-height: 1.1;
white-space: nowrap;
color: #ffffff;
color: var(--hf-caption-primary, #ffffff);
font-family: "Montserrat", Arial, sans-serif;
font-weight: 300;
font-size: 72px;
@@ -117,281 +117,568 @@
</div>
<script>
var DURATION = 8;
var SAFE_ZONE_WIDTH = 1400;
var MAX_LINE_WIDTH = SAFE_ZONE_WIDTH - 40;
var CAPTION_FONT_SIZE = 72;
var MAX_WORDS_PER_GROUP = 4;
var WORD_SPACING = 12;
var PAUSE_THRESHOLD = 0.1;
var ENTRY_DURATION = 100 / 1000;
var WEIGHT_TRANSITION = 100 / 1000;
var FONT_WIDTH_SAFETY = 1.14;
var FONT_WEIGHT_LIGHT = 300;
var FONT_WEIGHT_BOLD = 700;
// IIFE: keep every template's runtime private to itself so two caption
// components pasted into one composition document can't clobber each
// other's hfAttach/hfBuild via shared script-scope names (boot is async,
// so collisions surface AFTER all scripts have executed).
(function () {
var HF_COMPOSITION_ID = "caption-weight-shift";
var HF_ROOT_ID = "weight-shift";
var HF_GROUP_SELECTOR = ".caption-group";
var TRANSCRIPT = [
{ text: "Every", start: 0.0, end: 0.3 },
{ text: "great", start: 0.3, end: 0.55 },
{ text: "video", start: 0.55, end: 0.85 },
{ text: "starts", start: 0.85, end: 1.1 },
{ text: "with", start: 1.1, end: 1.25 },
{ text: "a", start: 1.25, end: 1.35 },
{ text: "single", start: 1.35, end: 1.65 },
{ text: "frame.", start: 1.65, end: 2.0 },
{ text: "HyperFrames", start: 2.1, end: 2.65 },
{ text: "lets", start: 2.65, end: 2.85 },
{ text: "you", start: 2.85, end: 2.95 },
{ text: "write", start: 2.95, end: 3.15 },
{ text: "HTML", start: 3.15, end: 3.55 },
{ text: "and", start: 3.55, end: 3.65 },
{ text: "render", start: 3.65, end: 3.95 },
{ text: "professional", start: 3.95, end: 4.45 },
{ text: "video.", start: 4.45, end: 4.8 },
{ text: "No", start: 4.9, end: 5.05 },
{ text: "timeline.", start: 5.05, end: 5.45 },
{ text: "No", start: 5.5, end: 5.65 },
{ text: "drag", start: 5.65, end: 5.85 },
{ text: "and", start: 5.85, end: 5.95 },
{ text: "drop.", start: 5.95, end: 6.25 },
{ text: "Just", start: 6.35, end: 6.55 },
{ text: "code", start: 6.55, end: 6.8 },
{ text: "that", start: 6.8, end: 6.95 },
{ text: "becomes", start: 6.95, end: 7.3 },
{ text: "cinema.", start: 7.3, end: 7.7 },
];
var HF_DEMO_DATA = {
version: 1,
segments: [
{
start: 0,
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.",
words: [
{ text: "Every", start: 0.0, end: 0.3 },
{ text: "great", start: 0.3, end: 0.55 },
{ text: "video", start: 0.55, end: 0.85 },
{ text: "starts", start: 0.85, end: 1.1 },
{ text: "with", start: 1.1, end: 1.25 },
{ text: "a", start: 1.25, end: 1.35 },
{ text: "single", start: 1.35, end: 1.65 },
{ text: "frame.", start: 1.65, end: 2.0 },
{ text: "HyperFrames", start: 2.1, end: 2.65 },
{ text: "lets", start: 2.65, end: 2.85 },
{ text: "you", start: 2.85, end: 2.95 },
{ text: "write", start: 2.95, end: 3.15 },
{ text: "HTML", start: 3.15, end: 3.55 },
{ text: "and", start: 3.55, end: 3.65 },
{ text: "render", start: 3.65, end: 3.95 },
{ text: "professional", start: 3.95, end: 4.45 },
{ text: "video.", start: 4.45, end: 4.8 },
{ text: "No", start: 4.9, end: 5.05 },
{ text: "timeline.", start: 5.05, end: 5.45 },
{ text: "No", start: 5.5, end: 5.65 },
{ text: "drag", start: 5.65, end: 5.85 },
{ text: "and", start: 5.85, end: 5.95 },
{ text: "drop.", start: 5.95, end: 6.25 },
{ text: "Just", start: 6.35, end: 6.55 },
{ text: "code", start: 6.55, end: 6.8 },
{ text: "that", start: 6.8, end: 6.95 },
{ text: "becomes", start: 6.95, end: 7.3 },
{ text: "cinema.", start: 7.3, end: 7.7 },
],
},
],
};
function normalizeWords(rawWords) {
return rawWords
.map(function (item) {
return {
text: String(item.word || item.text || "").trim(),
start: Math.max(0, Number(item.start) || 0),
end: Math.min(DURATION, Math.max(Number(item.start) || 0, Number(item.end) || 0)),
};
})
.filter(function (word) {
return word.text.length > 0;
/* ── HyperFrames caption-data runtime (shared across caption templates) ── */
var HF_CONTRACT_VERSION = 1;
var HF_DEFAULT_RESOLUTION = { width: 1920, height: 1080 };
function hfFlattenSegments(segments) {
var out = [];
(segments || []).forEach(function (seg) {
((seg && seg.words) || []).forEach(function (w) {
var start = Math.max(0, Number(w.start) || 0);
out.push({
text: String(w.word || w.text || "").trim(),
start: start,
end: Math.max(start, Number(w.end) || 0),
});
});
});
out.sort(function (a, b) {
return a.start - b.start;
});
return out.filter(function (w) {
return w.text.length > 0;
});
}
var _fitCanvas = document.createElement("canvas");
var _fitCtx = _fitCanvas.getContext("2d");
function fitFontSize(text, baseFontSize, fontWeight, fontFamily, maxWidth) {
var size = baseFontSize;
var minSize = Math.floor(baseFontSize * 0.45);
while (size > minSize) {
_fitCtx.font = fontWeight + " " + size + "px " + fontFamily;
if (_fitCtx.measureText(text).width <= maxWidth) return size;
size -= 2;
}
return minSize;
}
var measureCanvas = document.createElement("canvas");
var measureContext = measureCanvas.getContext("2d");
measureContext.font = "700 " + CAPTION_FONT_SIZE + "px Montserrat";
function measureWord(word) {
return measureContext.measureText(word.text.toLowerCase()).width * FONT_WIDTH_SAFETY;
}
function measureLineWidth(words) {
return words.reduce(function (total, word, index) {
return total + measureWord(word) + (index ? WORD_SPACING : 0);
}, 0);
}
function fitsInTwoLines(words) {
return measureLineWidth(words) <= MAX_LINE_WIDTH * 1.8;
}
function splitLines(words) {
if (words.length < 2) {
return [{ words: words, startIndex: 0 }];
function hfDeriveDuration(words) {
var end = 0;
words.forEach(function (w) {
if (w.end > end) end = w.end;
});
return end;
}
var bestSplit = Math.ceil(words.length / 2);
var bestDiff = Infinity;
for (var s = 1; s < words.length; s++) {
var w1 = measureLineWidth(words.slice(0, s));
var w2 = measureLineWidth(words.slice(s));
if (w1 <= MAX_LINE_WIDTH && w2 <= MAX_LINE_WIDTH) {
var diff = Math.abs(w1 - w2);
if (diff < bestDiff) {
bestDiff = diff;
bestSplit = s;
function hfValidate(data) {
if (!data || typeof data !== "object") return { ok: false, reason: "not-an-object" };
if (data.version != null) {
// Number("v2") is NaN and NaN > x is always false — an explicit
// finite check keeps malformed versions from slipping past the gate.
var hfVersion = Number(data.version);
if (!Number.isFinite(hfVersion) || Math.floor(hfVersion) > HF_CONTRACT_VERSION) {
return { ok: false, reason: "unsupported-version" };
}
}
if (!Array.isArray(data.segments) || data.segments.length === 0) {
return { ok: false, reason: "no-segments" };
}
if (data.displayMode != null && data.displayMode !== "full") {
return { ok: false, reason: "unsupported-displayMode" };
}
var words = hfFlattenSegments(data.segments);
if (words.length === 0) return { ok: false, reason: "no-words" };
return { ok: true, words: words, durationS: hfDeriveDuration(words) };
}
var result = [];
var line1 = words.slice(0, bestSplit);
var line2 = words.slice(bestSplit);
if (line1.length) result.push({ words: line1, startIndex: 0 });
if (line2.length) result.push({ words: line2, startIndex: line1.length });
return result;
}
function avoidSingleWordGroups(groups) {
var out = [];
groups.forEach(function (group) {
if (
group.words.length === 1 &&
out.length > 0 &&
out[out.length - 1].words.length < MAX_WORDS_PER_GROUP
) {
out[out.length - 1] = makeGroup(out[out.length - 1].words.concat(group.words));
function hfApplyStageConfig(data, durationS) {
var res = (data && data.resolution) || HF_DEFAULT_RESOLUTION;
// Mirror the published validator's <=8192 bound defensively — the
// validator is an optional pre-flight, and an unbounded stage size
// would OOM render workers.
var W = Math.min(
8192,
Math.max(1, Math.round(Number(res.width) || HF_DEFAULT_RESOLUTION.width)),
);
var H = Math.min(
8192,
Math.max(1, Math.round(Number(res.height) || HF_DEFAULT_RESOLUTION.height)),
);
var root = document.getElementById(HF_ROOT_ID);
[document.documentElement, document.body, root].forEach(function (el) {
el.style.width = W + "px";
el.style.height = H + "px";
});
root.setAttribute("data-width", String(W));
root.setAttribute("data-height", String(H));
root.setAttribute("data-duration", String(durationS));
var brand = (data && data.brand) || {};
if (typeof brand.primaryColor === "string" && brand.primaryColor) {
root.style.setProperty("--hf-caption-primary", brand.primaryColor);
} else {
out.push(group);
root.style.removeProperty("--hf-caption-primary");
}
});
for (var i = 0; i < out.length; i++) {
if (out[i].words.length !== 1) continue;
if (i + 1 < out.length && out[i + 1].words.length < MAX_WORDS_PER_GROUP) {
out[i] = makeGroup(out[i].words.concat(out[i + 1].words));
out.splice(i + 1, 1);
} else if (i > 0 && out[i - 1].words.length < MAX_WORDS_PER_GROUP) {
out[i - 1] = makeGroup(out[i - 1].words.concat(out[i].words));
out.splice(i, 1);
i--;
if (typeof brand.accentColor === "string" && brand.accentColor) {
root.style.setProperty("--hf-caption-accent", brand.accentColor);
} else {
root.style.removeProperty("--hf-caption-accent");
}
return {
W: W,
H: H,
scaleX: W / 1920,
scaleY: H / 1080,
fontScale: Math.min(W, H) / 1080,
};
}
return out;
}
function hfPublishStatus(status) {
window.__HF_CAPTION_STATUS = status;
document
.getElementById(HF_ROOT_ID)
.setAttribute("data-caption-status", status.ok ? "ok" : "failed");
}
function makeGroups(words) {
var groups = [];
var current = [];
words.forEach(function (word, index) {
var nextWord = words[index + 1];
var testGroup = current.concat([word]);
if (testGroup.length > MAX_WORDS_PER_GROUP || !fitsInTwoLines(testGroup)) {
if (current.length) groups.push(makeGroup(current));
current = [word];
function hfRunGate(words, durationS, failReason) {
if (failReason) {
hfPublishStatus({
ok: false,
present: false,
contained: false,
reason: failReason,
version: HF_CONTRACT_VERSION,
durationS: durationS || 0,
});
return;
}
current.push(word);
var punctuation = /[,.:!?]$/.test(word.text);
var pause = nextWord ? nextWord.start - word.end : 0;
if (
!nextWord ||
punctuation ||
pause >= PAUSE_THRESHOLD ||
current.length >= MAX_WORDS_PER_GROUP
) {
groups.push(makeGroup(current));
current = [];
}
});
if (current.length) groups.push(makeGroup(current));
return avoidSingleWordGroups(groups);
}
function makeGroup(words) {
return {
words: words.slice(),
lines: splitLines(words),
start: words[0].start,
end: words[words.length - 1].end,
};
}
function buildCaptions(groups) {
var stage = document.getElementById("caption-stage");
groups.forEach(function (group, groupIndex) {
var groupText = group.words
.map(function (w) {
return w.text.toLowerCase();
})
.join(" ");
var computedSize = fitFontSize(
groupText,
CAPTION_FONT_SIZE,
"700",
"Montserrat",
MAX_LINE_WIDTH,
);
var groupEl = document.createElement("div");
var copyEl = document.createElement("div");
groupEl.id = "caption-group-" + groupIndex;
groupEl.className = "caption-group";
copyEl.className = "caption-copy";
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";
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);
var root = document.getElementById(HF_ROOT_ID);
var rootRect = root.getBoundingClientRect();
var groups = root.querySelectorAll(HF_GROUP_SELECTOR);
var present = false;
var contained = true;
var tokens = [];
words.forEach(function (w) {
var t = w.text.toLowerCase().replace(/[^a-z0-9]/g, "");
if (t) tokens.push(t);
});
groups.forEach(function (el) {
var prevOpacity = el.style.opacity;
var prevVisibility = el.style.visibility;
el.style.opacity = "1";
el.style.visibility = "visible";
var r = el.getBoundingClientRect();
if (r.width > 0 && r.height > 0) {
var text = (el.textContent || "").toLowerCase();
for (var i = 0; i < tokens.length; i++) {
if (text.indexOf(tokens[i]) !== -1) {
present = true;
break;
}
}
if (
r.left < rootRect.left - 1 ||
r.right > rootRect.right + 1 ||
r.top < rootRect.top - 1 ||
r.bottom > rootRect.bottom + 1
) {
contained = false;
}
}
el.style.opacity = prevOpacity;
el.style.visibility = prevVisibility;
});
hfPublishStatus({
ok: present && contained,
present: present,
contained: contained,
version: HF_CONTRACT_VERSION,
durationS: durationS,
});
groupEl.appendChild(copyEl);
stage.appendChild(groupEl);
});
}
var WORDS = normalizeWords(TRANSCRIPT);
var GROUPS = makeGroups(WORDS);
buildCaptions(GROUPS);
window.__timelines = window.__timelines || {};
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;
allGroupEls.forEach(function (otherEl, otherIndex) {
if (otherIndex !== groupIndex) tl.set(otherEl, { opacity: 0 }, visibleStart);
});
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);
});
var SAFE_ZONE_WIDTH, MAX_LINE_WIDTH, CAPTION_FONT_SIZE, DURATION;
var MAX_WORDS_PER_GROUP = 4;
var WORD_SPACING_DESIGN = 12;
var WORD_SPACING;
var PAUSE_THRESHOLD = 0.1;
var ENTRY_DURATION = 100 / 1000;
var WEIGHT_TRANSITION = 100 / 1000;
var FONT_WIDTH_SAFETY = 1.14;
var FONT_WEIGHT_LIGHT = 300;
var FONT_WEIGHT_BOLD = 700;
window.__timelines["caption-weight-shift"] = tl;
function normalizeWords(rawWords) {
return rawWords
.map(function (item) {
return {
text: String(item.word || item.text || "").trim(),
start: Math.max(0, Number(item.start) || 0),
end: Math.min(DURATION, Math.max(Number(item.start) || 0, Number(item.end) || 0)),
};
})
.filter(function (word) {
return word.text.length > 0;
});
}
var _fitCanvas = document.createElement("canvas");
var _fitCtx = _fitCanvas.getContext("2d");
function fitFontSize(text, baseFontSize, fontWeight, fontFamily, maxWidth) {
var size = baseFontSize;
var minSize = Math.floor(baseFontSize * 0.45);
// minSize is a hard floor returned unverified below — self-heal
// accepts residual overflow at the floor (clipped by the stage)
// rather than shrinking below legibility.
while (size > minSize) {
_fitCtx.font = fontWeight + " " + size + "px " + fontFamily;
if (_fitCtx.measureText(text).width <= maxWidth) return size;
size -= 2;
}
return minSize;
}
var measureCanvas = document.createElement("canvas");
var measureContext = measureCanvas.getContext("2d");
function measureWord(word) {
return measureContext.measureText(word.text.toLowerCase()).width * FONT_WIDTH_SAFETY;
}
function measureLineWidth(words) {
return words.reduce(function (total, word, index) {
return total + measureWord(word) + (index ? WORD_SPACING : 0);
}, 0);
}
function fitsInTwoLines(words) {
return measureLineWidth(words) <= MAX_LINE_WIDTH * 1.8;
}
function splitLines(words) {
if (words.length < 2) {
return [{ words: words, startIndex: 0 }];
}
var bestSplit = Math.ceil(words.length / 2);
var bestDiff = Infinity;
for (var s = 1; s < words.length; s++) {
var w1 = measureLineWidth(words.slice(0, s));
var w2 = measureLineWidth(words.slice(s));
if (w1 <= MAX_LINE_WIDTH && w2 <= MAX_LINE_WIDTH) {
var diff = Math.abs(w1 - w2);
if (diff < bestDiff) {
bestDiff = diff;
bestSplit = s;
}
}
}
var result = [];
var line1 = words.slice(0, bestSplit);
var line2 = words.slice(bestSplit);
if (line1.length) result.push({ words: line1, startIndex: 0 });
if (line2.length) result.push({ words: line2, startIndex: line1.length });
return result;
}
function avoidSingleWordGroups(groups) {
var out = [];
groups.forEach(function (group) {
if (
group.words.length === 1 &&
out.length > 0 &&
out[out.length - 1].words.length < MAX_WORDS_PER_GROUP &&
// makeGroups guards every addition with fitsInTwoLines; this
// second-pass merge must too, or it can produce a group that
// splitLines cannot fit within MAX_LINE_WIDTH.
fitsInTwoLines(out[out.length - 1].words.concat(group.words))
) {
out[out.length - 1] = makeGroup(out[out.length - 1].words.concat(group.words));
} else {
out.push(group);
}
});
for (var i = 0; i < out.length; i++) {
if (out[i].words.length !== 1) continue;
if (
i + 1 < out.length &&
out[i + 1].words.length < MAX_WORDS_PER_GROUP &&
fitsInTwoLines(out[i].words.concat(out[i + 1].words))
) {
out[i] = makeGroup(out[i].words.concat(out[i + 1].words));
out.splice(i + 1, 1);
} else if (
i > 0 &&
out[i - 1].words.length < MAX_WORDS_PER_GROUP &&
fitsInTwoLines(out[i - 1].words.concat(out[i].words))
) {
out[i - 1] = makeGroup(out[i - 1].words.concat(out[i].words));
out.splice(i, 1);
i--;
}
}
return out;
}
function makeGroups(words) {
var groups = [];
var current = [];
words.forEach(function (word, index) {
var nextWord = words[index + 1];
var testGroup = current.concat([word]);
if (testGroup.length > MAX_WORDS_PER_GROUP || !fitsInTwoLines(testGroup)) {
if (current.length) groups.push(makeGroup(current));
current = [word];
return;
}
current.push(word);
var punctuation = /[,.:!?]$/.test(word.text);
var pause = nextWord ? nextWord.start - word.end : 0;
if (
!nextWord ||
punctuation ||
pause >= PAUSE_THRESHOLD ||
current.length >= MAX_WORDS_PER_GROUP
) {
groups.push(makeGroup(current));
current = [];
}
});
if (current.length) groups.push(makeGroup(current));
return avoidSingleWordGroups(groups);
}
function makeGroup(words) {
return {
words: words.slice(),
lines: splitLines(words),
start: words[0].start,
end: words[words.length - 1].end,
};
}
function buildCaptions(groups) {
var stage = document.getElementById("caption-stage");
groups.forEach(function (group, groupIndex) {
// Fit the WIDEST split line, not the joined group text: the group
// renders across up to two lines, so sizing against the joined
// string shrank two-line groups that already fit at full size.
var widestLineText = "";
var widestLineWidth = -1;
group.lines.forEach(function (line) {
var lineWidth = measureLineWidth(line.words);
if (lineWidth > widestLineWidth) {
widestLineWidth = lineWidth;
widestLineText = line.words
.map(function (w) {
return w.text.toLowerCase();
})
.join(" ");
}
});
var computedSize = fitFontSize(
widestLineText,
CAPTION_FONT_SIZE,
"700",
"Montserrat",
MAX_LINE_WIDTH,
);
var groupEl = document.createElement("div");
var copyEl = document.createElement("div");
groupEl.id = "caption-group-" + groupIndex;
groupEl.className = "caption-group";
copyEl.className = "caption-copy";
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>