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31 lines
1.0 KiB
Plaintext
31 lines
1.0 KiB
Plaintext
import { mixNumber } from 'motion-dom';
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import { getEasingForSegment, removeItem } from 'motion-utils';
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function eraseKeyframes(sequence, startTime, endTime) {
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for (let i = 0; i < sequence.length; i++) {
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const keyframe = sequence[i];
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if (keyframe.at > startTime && keyframe.at < endTime) {
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removeItem(sequence, keyframe);
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// If we remove this item we have to push the pointer back one
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i--;
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}
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}
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}
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function addKeyframes(sequence, keyframes, easing, offset, startTime, endTime) {
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/**
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* Erase every existing value between currentTime and targetTime,
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* this will essentially splice this timeline into any currently
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* defined ones.
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*/
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eraseKeyframes(sequence, startTime, endTime);
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for (let i = 0; i < keyframes.length; i++) {
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sequence.push({
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value: keyframes[i],
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at: mixNumber(startTime, endTime, offset[i]),
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easing: getEasingForSegment(easing, i),
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});
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}
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}
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export { addKeyframes, eraseKeyframes };
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