Vlad Durnea
cffdf8af86
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18 lines
613 B
JavaScript
18 lines
613 B
JavaScript
import memoize from 'lodash/memoize';
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/**
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* This is memoized because the viewBox is unlikely to change often
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* - but because it is computed from offset, any change to it would re-render all children.
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*
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* And because we have many readers of the viewBox, and update it only rarely,
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* then let's optimize with memoization.
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*/
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export var calculateViewBox = memoize(function (offset) {
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return {
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x: offset.left,
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y: offset.top,
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width: offset.width,
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height: offset.height
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};
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}, function (offset) {
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return ['l', offset.left, 't', offset.top, 'w', offset.width, 'h', offset.height].join('');
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}); |