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import getBasePlacement from "./getBasePlacement.js";
import getVariation from "./getVariation.js";
import getMainAxisFromPlacement from "./getMainAxisFromPlacement.js";
import { top, right, bottom, left, start, end } from "../enums.js";
export default function computeOffsets(_ref) {
var reference = _ref.reference,
element = _ref.element,
placement = _ref.placement;
var basePlacement = placement ? getBasePlacement(placement) : null;
var variation = placement ? getVariation(placement) : null;
var commonX = reference.x + reference.width / 2 - element.width / 2;
var commonY = reference.y + reference.height / 2 - element.height / 2;
var offsets;
switch (basePlacement) {
case top:
offsets = {
x: commonX,
y: reference.y - element.height
};
break;
case bottom:
offsets = {
x: commonX,
y: reference.y + reference.height
};
break;
case right:
offsets = {
x: reference.x + reference.width,
y: commonY
};
break;
case left:
offsets = {
x: reference.x - element.width,
y: commonY
};
break;
default:
offsets = {
x: reference.x,
y: reference.y
};
}
var mainAxis = basePlacement ? getMainAxisFromPlacement(basePlacement) : null;
if (mainAxis != null) {
var len = mainAxis === 'y' ? 'height' : 'width';
switch (variation) {
case start:
offsets[mainAxis] = offsets[mainAxis] - (reference[len] / 2 - element[len] / 2);
break;
case end:
offsets[mainAxis] = offsets[mainAxis] + (reference[len] / 2 - element[len] / 2);
break;
default:
}
}
return offsets;
}
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