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63 lines
2.2 KiB
Plaintext
63 lines
2.2 KiB
Plaintext
import { getValueAsType } from '../../dom/value-types/get-as-type.mjs';
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import { numberValueTypes } from '../../dom/value-types/number.mjs';
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import { transformPropOrder } from './keys-transform.mjs';
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const translateAlias = {
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x: "translateX",
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y: "translateY",
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z: "translateZ",
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transformPerspective: "perspective",
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};
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const numTransforms = transformPropOrder.length;
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/**
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* Build a CSS transform style from individual x/y/scale etc properties.
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*
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* This outputs with a default order of transforms/scales/rotations, this can be customised by
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* providing a transformTemplate function.
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*/
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function buildTransform(latestValues, transform, transformTemplate) {
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// The transform string we're going to build into.
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let transformString = "";
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let transformIsDefault = true;
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/**
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* Loop over all possible transforms in order, adding the ones that
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* are present to the transform string.
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*/
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for (let i = 0; i < numTransforms; i++) {
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const key = transformPropOrder[i];
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const value = latestValues[key];
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if (value === undefined)
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continue;
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let valueIsDefault = true;
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if (typeof value === "number") {
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valueIsDefault = value === (key.startsWith("scale") ? 1 : 0);
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}
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else {
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valueIsDefault = parseFloat(value) === 0;
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}
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if (!valueIsDefault || transformTemplate) {
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const valueAsType = getValueAsType(value, numberValueTypes[key]);
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if (!valueIsDefault) {
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transformIsDefault = false;
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const transformName = translateAlias[key] || key;
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transformString += `${transformName}(${valueAsType}) `;
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}
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if (transformTemplate) {
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transform[key] = valueAsType;
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}
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}
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}
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transformString = transformString.trim();
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// If we have a custom `transform` template, pass our transform values and
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// generated transformString to that before returning
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if (transformTemplate) {
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transformString = transformTemplate(transform, transformIsDefault ? "" : transformString);
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}
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else if (transformIsDefault) {
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transformString = "none";
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}
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return transformString;
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}
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export { buildTransform };
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