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76 lines
2.0 KiB
76 lines
2.0 KiB
2 years ago
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// @flow
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import type { Position } from 'css-box-model';
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import { isEqual, origin } from './state/position';
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export const curves = {
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outOfTheWay: 'cubic-bezier(0.2, 0, 0, 1)',
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drop: 'cubic-bezier(.2,1,.1,1)',
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};
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export const combine = {
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opacity: {
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// while dropping: fade out totally
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drop: 0,
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// while dragging: fade out partially
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combining: 0.7,
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},
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scale: {
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drop: 0.75,
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},
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};
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export const timings = {
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outOfTheWay: 0.2,
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// greater than the out of the way time
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// so that when the drop ends everything will
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// have to be out of the way
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minDropTime: 0.33,
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maxDropTime: 0.55,
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};
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// slow timings
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// uncomment to use
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// export const timings = {
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// outOfTheWay: 2,
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// // greater than the out of the way time
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// // so that when the drop ends everything will
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// // have to be out of the way
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// minDropTime: 3,
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// maxDropTime: 4,
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// };
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const outOfTheWayTiming: string = `${timings.outOfTheWay}s ${curves.outOfTheWay}`;
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export const placeholderTransitionDelayTime: number = 0.1;
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export const transitions = {
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fluid: `opacity ${outOfTheWayTiming}`,
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snap: `transform ${outOfTheWayTiming}, opacity ${outOfTheWayTiming}`,
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drop: (duration: number): string => {
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const timing: string = `${duration}s ${curves.drop}`;
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return `transform ${timing}, opacity ${timing}`;
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},
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outOfTheWay: `transform ${outOfTheWayTiming}`,
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placeholder: `height ${outOfTheWayTiming}, width ${outOfTheWayTiming}, margin ${outOfTheWayTiming}`,
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};
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const moveTo = (offset: Position): ?string =>
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isEqual(offset, origin) ? null : `translate(${offset.x}px, ${offset.y}px)`;
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export const transforms = {
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moveTo,
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drop: (offset: Position, isCombining: boolean) => {
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const translate: ?string = moveTo(offset);
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if (!translate) {
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return null;
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}
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// only transforming the translate
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if (!isCombining) {
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return translate;
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}
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// when dropping while combining we also update the scale
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return `${translate} scale(${combine.scale.drop})`;
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},
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};
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