@hxui/angular
Version:
An Angular library based on the [HXUI design system](https://hxui.io).
152 lines • 24.1 kB
JavaScript
/**
* @copyright Valor Software
* @copyright Angular ng-bootstrap team
*/
// previous version:
// https://github.com/angular-ui/bootstrap/blob/07c31d0731f7cb068a1932b8e01d2312b796b4ec/src/position/position.js
export class Positioning {
position(element, round = true) {
let elPosition;
let parentOffset = {
width: 0,
height: 0,
top: 0,
bottom: 0,
left: 0,
right: 0
};
if (this.getStyle(element, 'position') === 'fixed') {
const tempPos = element.getBoundingClientRect();
elPosition = tempPos;
}
else {
const offsetParentEl = this.offsetParent(element);
elPosition = this.offset(element, false);
if (offsetParentEl !== document.documentElement) {
parentOffset = this.offset(offsetParentEl, false);
}
parentOffset.top += offsetParentEl.clientTop;
parentOffset.left += offsetParentEl.clientLeft;
}
elPosition.top -= parentOffset.top;
elPosition.bottom -= parentOffset.top;
elPosition.left -= parentOffset.left;
elPosition.right -= parentOffset.left;
if (round) {
elPosition.top = Math.round(elPosition.top);
elPosition.bottom = Math.round(elPosition.bottom);
elPosition.left = Math.round(elPosition.left);
elPosition.right = Math.round(elPosition.right);
}
return elPosition;
}
offset(element, round = true) {
const elBcr = element.getBoundingClientRect();
const viewportOffset = {
top: window.pageYOffset - document.documentElement.clientTop,
left: window.pageXOffset - document.documentElement.clientLeft
};
const elOffset = {
height: elBcr.height || element.offsetHeight,
width: elBcr.width || element.offsetWidth,
top: elBcr.top + viewportOffset.top,
bottom: elBcr.bottom + viewportOffset.top,
left: elBcr.left + viewportOffset.left,
right: elBcr.right + viewportOffset.left
};
if (round) {
elOffset.height = Math.round(elOffset.height);
elOffset.width = Math.round(elOffset.width);
elOffset.top = Math.round(elOffset.top);
elOffset.bottom = Math.round(elOffset.bottom);
elOffset.left = Math.round(elOffset.left);
elOffset.right = Math.round(elOffset.right);
}
return elOffset;
}
positionElements(hostElement, targetElement, placement, appendToBody) {
const hostElPosition = appendToBody
? this.offset(hostElement, false)
: this.position(hostElement, false);
const shiftWidth = {
left: hostElPosition.left,
center: hostElPosition.left +
hostElPosition.width / 2 -
targetElement.offsetWidth / 2,
right: hostElPosition.left + hostElPosition.width
};
const shiftHeight = {
top: hostElPosition.top,
center: hostElPosition.top +
hostElPosition.height / 2 -
targetElement.offsetHeight / 2,
bottom: hostElPosition.top + hostElPosition.height
};
const targetElBCR = targetElement.getBoundingClientRect();
const placementPrimary = placement.split(' ')[0] || 'top';
const placementSecondary = placement.split(' ')[1] || 'center';
const targetElPosition = {
height: targetElBCR.height || targetElement.offsetHeight,
width: targetElBCR.width || targetElement.offsetWidth,
top: 0,
bottom: targetElBCR.height || targetElement.offsetHeight,
left: 0,
right: targetElBCR.width || targetElement.offsetWidth
};
switch (placementPrimary) {
case 'top':
targetElPosition.top = hostElPosition.top - targetElement.offsetHeight;
targetElPosition.bottom +=
hostElPosition.top - targetElement.offsetHeight;
targetElPosition.left = shiftWidth[placementSecondary];
targetElPosition.right += shiftWidth[placementSecondary];
break;
case 'bottom':
targetElPosition.top = shiftHeight[placementPrimary];
targetElPosition.bottom += shiftHeight[placementPrimary];
targetElPosition.left = shiftWidth[placementSecondary];
targetElPosition.right += shiftWidth[placementSecondary];
break;
case 'left':
targetElPosition.top = shiftHeight[placementSecondary];
targetElPosition.bottom += shiftHeight[placementSecondary];
targetElPosition.left = hostElPosition.left - targetElement.offsetWidth;
targetElPosition.right +=
hostElPosition.left - targetElement.offsetWidth;
break;
case 'right':
targetElPosition.top = shiftHeight[placementSecondary];
targetElPosition.bottom += shiftHeight[placementSecondary];
targetElPosition.left = shiftWidth[placementPrimary];
targetElPosition.right += shiftWidth[placementPrimary];
break;
}
targetElPosition.top = Math.round(targetElPosition.top);
targetElPosition.bottom = Math.round(targetElPosition.bottom);
targetElPosition.left = Math.round(targetElPosition.left);
targetElPosition.right = Math.round(targetElPosition.right);
return targetElPosition;
}
getStyle(element, prop) {
return window.getComputedStyle(element)[prop];
}
isStaticPositioned(element) {
return (this.getStyle(element, 'position') || 'static') === 'static';
}
offsetParent(element) {
let offsetParentEl = element.offsetParent || document.documentElement;
while (offsetParentEl &&
offsetParentEl !== document.documentElement &&
this.isStaticPositioned(offsetParentEl)) {
offsetParentEl = offsetParentEl.offsetParent;
}
return offsetParentEl || document.documentElement;
}
}
const positionService = new Positioning();
export function positionElements(hostElement, targetElement, placement, appendToBody) {
const pos = positionService.positionElements(hostElement, targetElement, placement, appendToBody);
targetElement.style.top = `${pos.top}px`;
targetElement.style.left = `${pos.left}px`;
}
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* @copyright Valor Software\r\n * @copyright Angular ng-bootstrap team\r\n */\r\n\r\n// previous version:\r\n// https://github.com/angular-ui/bootstrap/blob/07c31d0731f7cb068a1932b8e01d2312b796b4ec/src/position/position.js\r\n\r\nexport class Positioning {\r\n  public position(element: HTMLElement, round = true): Record<string, number> {\r\n    let elPosition: Record<string, number>;\r\n    let parentOffset: Record<string, number> = {\r\n      width: 0,\r\n      height: 0,\r\n      top: 0,\r\n      bottom: 0,\r\n      left: 0,\r\n      right: 0\r\n    };\r\n\r\n    if (this.getStyle(element, 'position') === 'fixed') {\r\n      const tempPos = element.getBoundingClientRect() as unknown;\r\n      elPosition = tempPos as Record<string, number>;\r\n    } else {\r\n      const offsetParentEl = this.offsetParent(element);\r\n\r\n      elPosition = this.offset(element, false);\r\n\r\n      if (offsetParentEl !== document.documentElement) {\r\n        parentOffset = this.offset(offsetParentEl, false);\r\n      }\r\n\r\n      parentOffset.top += offsetParentEl.clientTop;\r\n      parentOffset.left += offsetParentEl.clientLeft;\r\n    }\r\n\r\n    elPosition.top -= parentOffset.top;\r\n    elPosition.bottom -= parentOffset.top;\r\n    elPosition.left -= parentOffset.left;\r\n    elPosition.right -= parentOffset.left;\r\n\r\n    if (round) {\r\n      elPosition.top = Math.round(elPosition.top);\r\n      elPosition.bottom = Math.round(elPosition.bottom);\r\n      elPosition.left = Math.round(elPosition.left);\r\n      elPosition.right = Math.round(elPosition.right);\r\n    }\r\n\r\n    return elPosition;\r\n  }\r\n\r\n  public offset(element: HTMLElement, round = true): Record<string, number> {\r\n    const elBcr = element.getBoundingClientRect();\r\n    const viewportOffset = {\r\n      top: window.pageYOffset - document.documentElement.clientTop,\r\n      left: window.pageXOffset - document.documentElement.clientLeft\r\n    };\r\n\r\n    const elOffset = {\r\n      height: elBcr.height || element.offsetHeight,\r\n      width: elBcr.width || element.offsetWidth,\r\n      top: elBcr.top + viewportOffset.top,\r\n      bottom: elBcr.bottom + viewportOffset.top,\r\n      left: elBcr.left + viewportOffset.left,\r\n      right: elBcr.right + viewportOffset.left\r\n    };\r\n\r\n    if (round) {\r\n      elOffset.height = Math.round(elOffset.height);\r\n      elOffset.width = Math.round(elOffset.width);\r\n      elOffset.top = Math.round(elOffset.top);\r\n      elOffset.bottom = Math.round(elOffset.bottom);\r\n      elOffset.left = Math.round(elOffset.left);\r\n      elOffset.right = Math.round(elOffset.right);\r\n    }\r\n\r\n    return elOffset;\r\n  }\r\n\r\n  public positionElements(\r\n    hostElement: HTMLElement,\r\n    targetElement: HTMLElement,\r\n    placement: string,\r\n    appendToBody?: boolean\r\n  ): Record<string, number> {\r\n    const hostElPosition = appendToBody\r\n      ? this.offset(hostElement, false)\r\n      : this.position(hostElement, false);\r\n    const shiftWidth: any = {\r\n      left: hostElPosition.left,\r\n      center:\r\n        hostElPosition.left +\r\n        hostElPosition.width / 2 -\r\n        targetElement.offsetWidth / 2,\r\n      right: hostElPosition.left + hostElPosition.width\r\n    };\r\n    const shiftHeight: any = {\r\n      top: hostElPosition.top,\r\n      center:\r\n        hostElPosition.top +\r\n        hostElPosition.height / 2 -\r\n        targetElement.offsetHeight / 2,\r\n      bottom: hostElPosition.top + hostElPosition.height\r\n    };\r\n    const targetElBCR = targetElement.getBoundingClientRect();\r\n    const placementPrimary = placement.split(' ')[0] || 'top';\r\n    const placementSecondary = placement.split(' ')[1] || 'center';\r\n\r\n    const targetElPosition: Record<string, number> = {\r\n      height: targetElBCR.height || targetElement.offsetHeight,\r\n      width: targetElBCR.width || targetElement.offsetWidth,\r\n      top: 0,\r\n      bottom: targetElBCR.height || targetElement.offsetHeight,\r\n      left: 0,\r\n      right: targetElBCR.width || targetElement.offsetWidth\r\n    };\r\n\r\n    switch (placementPrimary) {\r\n      case 'top':\r\n        targetElPosition.top = hostElPosition.top - targetElement.offsetHeight;\r\n        targetElPosition.bottom +=\r\n          hostElPosition.top - targetElement.offsetHeight;\r\n        targetElPosition.left = shiftWidth[placementSecondary];\r\n        targetElPosition.right += shiftWidth[placementSecondary];\r\n        break;\r\n      case 'bottom':\r\n        targetElPosition.top = shiftHeight[placementPrimary];\r\n        targetElPosition.bottom += shiftHeight[placementPrimary];\r\n        targetElPosition.left = shiftWidth[placementSecondary];\r\n        targetElPosition.right += shiftWidth[placementSecondary];\r\n        break;\r\n      case 'left':\r\n        targetElPosition.top = shiftHeight[placementSecondary];\r\n        targetElPosition.bottom += shiftHeight[placementSecondary];\r\n        targetElPosition.left = hostElPosition.left - targetElement.offsetWidth;\r\n        targetElPosition.right +=\r\n          hostElPosition.left - targetElement.offsetWidth;\r\n        break;\r\n      case 'right':\r\n        targetElPosition.top = shiftHeight[placementSecondary];\r\n        targetElPosition.bottom += shiftHeight[placementSecondary];\r\n        targetElPosition.left = shiftWidth[placementPrimary];\r\n        targetElPosition.right += shiftWidth[placementPrimary];\r\n        break;\r\n    }\r\n\r\n    targetElPosition.top = Math.round(targetElPosition.top);\r\n    targetElPosition.bottom = Math.round(targetElPosition.bottom);\r\n    targetElPosition.left = Math.round(targetElPosition.left);\r\n    targetElPosition.right = Math.round(targetElPosition.right);\r\n\r\n    return targetElPosition;\r\n  }\r\n\r\n  private getStyle(element: HTMLElement, prop: string): string {\r\n    return (window.getComputedStyle(element) as any)[prop];\r\n  }\r\n\r\n  private isStaticPositioned(element: HTMLElement): boolean {\r\n    return (this.getStyle(element, 'position') || 'static') === 'static';\r\n  }\r\n\r\n  private offsetParent(element: HTMLElement): HTMLElement {\r\n    let offsetParentEl =\r\n      <HTMLElement>element.offsetParent || document.documentElement;\r\n\r\n    while (\r\n      offsetParentEl &&\r\n      offsetParentEl !== document.documentElement &&\r\n      this.isStaticPositioned(offsetParentEl)\r\n    ) {\r\n      offsetParentEl = <HTMLElement>offsetParentEl.offsetParent;\r\n    }\r\n\r\n    return offsetParentEl || document.documentElement;\r\n  }\r\n}\r\n\r\nconst positionService = new Positioning();\r\n\r\nexport function positionElements(\r\n  hostElement: HTMLElement,\r\n  targetElement: HTMLElement,\r\n  placement: string,\r\n  appendToBody?: boolean\r\n): void {\r\n  const pos = positionService.positionElements(\r\n    hostElement,\r\n    targetElement,\r\n    placement,\r\n    appendToBody\r\n  );\r\n\r\n  targetElement.style.top = `${pos.top}px`;\r\n  targetElement.style.left = `${pos.left}px`;\r\n}\r\n"]}