angular-bootstrap-md
Version:
Bootstrap 4 & Angular 15 UI KIT - 700+ components, MIT license, simple installation.
56 lines • 8.84 kB
JavaScript
import { getBoundaries, isModifierEnabled } from '../utils/index';
export function preventOverflow(data) {
if (!isModifierEnabled(data.options, 'preventOverflow')) {
return data;
}
// NOTE: DOM access here
// resets the targetOffsets's position so that the document size can be calculated excluding
// the size of the targetOffsets element itself
const transformProp = 'transform';
const targetStyles = data.instance.target.style; // assignment to help minification
const { top, left, [transformProp]: transform } = targetStyles;
targetStyles.top = '';
targetStyles.left = '';
targetStyles[transformProp] = '';
const boundaries = getBoundaries(data.instance.target, data.instance.host, 0, // padding
'scrollParent', false // positionFixed
);
// NOTE: DOM access here
// restores the original style properties after the offsets have been computed
targetStyles.top = top;
targetStyles.left = left;
targetStyles[transformProp] = transform;
const order = ['left', 'right', 'top', 'bottom'];
const check = {
primary(placement) {
let value = data.offsets.target[placement];
if (data.offsets.target[placement] < boundaries[placement] &&
!false // options.escapeWithReference
) {
value = Math.max(data.offsets.target[placement], boundaries[placement]);
}
return { [placement]: value };
},
secondary(placement) {
const mainSide = placement === 'right' ? 'left' : 'top';
let value = data.offsets.target[mainSide];
if (data.offsets.target[placement] > boundaries[placement] &&
!false // escapeWithReference
) {
value = Math.min(data.offsets.target[mainSide], boundaries[placement] -
(placement === 'right' ? data.offsets.target.width : data.offsets.target.height));
}
return { [mainSide]: value };
}
};
let side;
order.forEach(placement => {
side = ['left', 'top']
.indexOf(placement) !== -1
? 'primary'
: 'secondary';
data.offsets.target = { ...data.offsets.target, ...check[side](placement) };
});
return data;
}
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