ngx-bootstrap
Version:
Angular Bootstrap
56 lines • 11.3 kB
JavaScript
import { getClientRect, getOuterSizes, getStyleComputedProperty } from '../utils';
export function arrow(data) {
let targetOffsets = data.offsets.target;
// if arrowElement is a string, suppose it's a CSS selector
const arrowElement = data.instance.target.querySelector('.arrow');
// if arrowElement is not found, don't run the modifier
if (!arrowElement) {
return data;
}
const isVertical = ['left', 'right'].indexOf(data.placement.split(' ')[0]) !== -1;
const len = isVertical ? 'height' : 'width';
const sideCapitalized = isVertical ? 'Top' : 'Left';
const side = sideCapitalized.toLowerCase();
const altSide = isVertical ? 'left' : 'top';
const opSide = isVertical ? 'bottom' : 'right';
const arrowElementSize = getOuterSizes(arrowElement)[len];
const placementVariation = data.placement.split(' ')[1];
// top/left side
if ((data.offsets.host[opSide] ?? 0) - arrowElementSize < (targetOffsets[side] ?? 0)) {
(targetOffsets)[side] -=
(targetOffsets[side] ?? 0) - ((data.offsets.host[opSide] ?? 0) - arrowElementSize);
}
// bottom/right side
if (Number((data).offsets.host[side]) + Number(arrowElementSize) > (targetOffsets[opSide] ?? 0)) {
(targetOffsets)[side] +=
Number((data).offsets.host[side]) + Number(arrowElementSize) - Number((targetOffsets)[opSide]);
}
targetOffsets = getClientRect(targetOffsets);
// Compute the sideValue using the updated target offsets
// take target margin in account because we don't have this info available
const css = getStyleComputedProperty(data.instance.target);
const targetMarginSide = parseFloat(css[`margin${sideCapitalized}`]) || 0;
const targetBorderSide = parseFloat(css[`border${sideCapitalized}Width`]) || 0;
// compute center of the target
let center;
if (!placementVariation) {
center = Number((data).offsets.host[side]) + Number(data.offsets.host[len] / 2 - arrowElementSize / 2);
}
else {
const targetBorderRadius = parseFloat(css["borderRadius"]) || 0;
const targetSideArrowOffset = Number(targetMarginSide + targetBorderSide + targetBorderRadius);
center = side === placementVariation ?
Number((data).offsets.host[side]) + targetSideArrowOffset :
Number((data).offsets.host[side]) + Number(data.offsets.host[len] - targetSideArrowOffset);
}
let sideValue = center - (targetOffsets[side] ?? 0) - targetMarginSide - targetBorderSide;
// prevent arrowElement from being placed not contiguously to its target
sideValue = Math.max(Math.min(targetOffsets[len] - (arrowElementSize + 5), sideValue), 0);
data.offsets.arrow = {
[side]: Math.round(sideValue),
[altSide]: '' // make sure to unset any eventual altSide value from the DOM node
};
data.instance.arrow = arrowElement;
return data;
}
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'height' : 'width';\n  const sideCapitalized = isVertical ? 'Top' : 'Left';\n  const side = sideCapitalized.toLowerCase() as keyof typeof targetOffsets;\n  const altSide = isVertical ? 'left' : 'top';\n  const opSide = isVertical ? 'bottom' : 'right';\n  const arrowElementSize = getOuterSizes(arrowElement)[len];\n  const placementVariation = data.placement.split(' ')[1];\n\n  // top/left side\n  if ((data.offsets.host[opSide] ?? 0) - arrowElementSize < (targetOffsets[side] ?? 0)) {\n    (targetOffsets)[side] -=\n      (targetOffsets[side] ?? 0) - ((data.offsets.host[opSide] ?? 0) - arrowElementSize);\n  }\n  // bottom/right side\n  if (Number((data).offsets.host[side]) + Number(arrowElementSize) > (targetOffsets[opSide] ?? 0)) {\n    (targetOffsets)[side] +=\n      Number((data).offsets.host[side]) + Number(arrowElementSize) - Number((targetOffsets)[opSide]);\n  }\n  targetOffsets = getClientRect(targetOffsets);\n\n  // Compute the sideValue using the updated target offsets\n  // take target margin in account because we don't have this info available\n  const css = getStyleComputedProperty(data.instance.target) as unknown as Record<string, string>;\n  const targetMarginSide = parseFloat(css[`margin${sideCapitalized}`]) || 0;\n  const targetBorderSide = parseFloat(css[`border${sideCapitalized}Width`]) || 0;\n\n  // compute center of the target\n  let center: number;\n  if (!placementVariation) {\n    center = Number((data).offsets.host[side]) + Number(data.offsets.host[len] / 2 - arrowElementSize / 2);\n  } else {\n    const targetBorderRadius = parseFloat(css[\"borderRadius\"]) || 0;\n    const targetSideArrowOffset = Number(targetMarginSide + targetBorderSide + targetBorderRadius);\n    center = side === placementVariation ?\n      Number((data).offsets.host[side]) + targetSideArrowOffset :\n      Number((data).offsets.host[side]) + Number(data.offsets.host[len] - targetSideArrowOffset);\n  }\n\n  let sideValue =\n    center - (targetOffsets[side] ?? 0) - targetMarginSide - targetBorderSide;\n\n  // prevent arrowElement from being placed not contiguously to its target\n  sideValue = Math.max(Math.min(targetOffsets[len] - (arrowElementSize + 5), sideValue), 0);\n  data.offsets.arrow = {\n    [side]: Math.round(sideValue),\n    [altSide]: '' // make sure to unset any eventual altSide value from the DOM node\n  };\n\n  data.instance.arrow = arrowElement;\n\n  return data;\n}\n"]}