@universal-material/angular
Version:
This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 16.1.0.
253 lines • 44.1 kB
JavaScript
export class Positioning {
getAllStyles(element) { return window.getComputedStyle(element); }
getStyle(element, prop) { return this.getAllStyles(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;
}
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') {
elPosition = element.getBoundingClientRect();
}
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
};
let 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 targetElStyles = this.getAllStyles(targetElement);
const targetElBCR = targetElement.getBoundingClientRect();
const placementPrimary = placement.split('-')[0] || 'top';
const placementSecondary = placement.split('-')[1] || 'center';
let 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 + parseFloat(targetElStyles['marginBottom']));
break;
case 'bottom':
targetElPosition.top = hostElPosition.top + hostElPosition.height;
break;
case 'left':
targetElPosition.left =
hostElPosition.left - (targetElement.offsetWidth + parseFloat(targetElStyles['marginRight']));
break;
case 'right':
targetElPosition.left = hostElPosition.left + hostElPosition.width;
break;
}
switch (placementSecondary) {
case 'top':
targetElPosition.top = hostElPosition.top;
break;
case 'bottom':
targetElPosition.top = hostElPosition.top + hostElPosition.height - targetElement.offsetHeight;
break;
case 'left':
targetElPosition.left = hostElPosition.left;
break;
case 'right':
targetElPosition.left = hostElPosition.left + hostElPosition.width - targetElement.offsetWidth;
break;
case 'center':
if (placementPrimary === 'top' || placementPrimary === 'bottom') {
targetElPosition.left = hostElPosition.left + hostElPosition.width / 2 - targetElement.offsetWidth / 2;
}
else {
targetElPosition.top = hostElPosition.top + hostElPosition.height / 2 - targetElement.offsetHeight / 2;
}
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;
}
// get the available placements of the target element in the viewport depending on the host element
getAvailablePlacements(hostElement, targetElement) {
let availablePlacements = [];
let hostElemClientRect = hostElement.getBoundingClientRect();
let targetElemClientRect = targetElement.getBoundingClientRect();
let html = document.documentElement;
let windowHeight = window.innerHeight || html.clientHeight;
let windowWidth = window.innerWidth || html.clientWidth;
let hostElemClientRectHorCenter = hostElemClientRect.left + hostElemClientRect.width / 2;
let hostElemClientRectVerCenter = hostElemClientRect.top + hostElemClientRect.height / 2;
// left: check if target width can be placed between host left and viewport start and also height of target is
// inside viewport
if (targetElemClientRect.width < hostElemClientRect.left) {
// check for left only
if (hostElemClientRectVerCenter > targetElemClientRect.height / 2 &&
windowHeight - hostElemClientRectVerCenter > targetElemClientRect.height / 2) {
availablePlacements.splice(availablePlacements.length, 1, 'left');
}
// check for left-top and left-bottom
this.setSecondaryPlacementForLeftRight(hostElemClientRect, targetElemClientRect, 'left', availablePlacements);
}
// top: target height is less than host top
if (targetElemClientRect.height < hostElemClientRect.top) {
if (hostElemClientRectHorCenter > targetElemClientRect.width / 2 &&
windowWidth - hostElemClientRectHorCenter > targetElemClientRect.width / 2) {
availablePlacements.splice(availablePlacements.length, 1, 'top');
}
this.setSecondaryPlacementForTopBottom(hostElemClientRect, targetElemClientRect, 'top', availablePlacements);
}
// right: check if target width can be placed between host right and viewport end and also height of target is
// inside viewport
if (windowWidth - hostElemClientRect.right > targetElemClientRect.width) {
// check for right only
if (hostElemClientRectVerCenter > targetElemClientRect.height / 2 &&
windowHeight - hostElemClientRectVerCenter > targetElemClientRect.height / 2) {
availablePlacements.splice(availablePlacements.length, 1, 'right');
}
// check for right-top and right-bottom
this.setSecondaryPlacementForLeftRight(hostElemClientRect, targetElemClientRect, 'right', availablePlacements);
}
// bottom: check if there is enough space between host bottom and viewport end for target height
if (windowHeight - hostElemClientRect.bottom > targetElemClientRect.height) {
if (hostElemClientRectHorCenter > targetElemClientRect.width / 2 &&
windowWidth - hostElemClientRectHorCenter > targetElemClientRect.width / 2) {
availablePlacements.splice(availablePlacements.length, 1, 'bottom');
}
this.setSecondaryPlacementForTopBottom(hostElemClientRect, targetElemClientRect, 'bottom', availablePlacements);
}
return availablePlacements;
}
/**
* check if secondary placement for left and right are available i.e. left-top, left-bottom, right-top, right-bottom
* primaryplacement: left|right
* availablePlacementArr: array in which available placements to be set
*/
setSecondaryPlacementForLeftRight(hostElemClientRect, targetElemClientRect, primaryPlacement, availablePlacementArr) {
let html = document.documentElement;
// check for left-bottom
if (targetElemClientRect.height <= hostElemClientRect.bottom) {
availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-bottom');
}
if ((window.innerHeight || html.clientHeight) - hostElemClientRect.top >= targetElemClientRect.height) {
availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-top');
}
}
/**
* check if secondary placement for top and bottom are available i.e. top-left, top-right, bottom-left, bottom-right
* primaryplacement: top|bottom
* availablePlacementArr: array in which available placements to be set
*/
setSecondaryPlacementForTopBottom(hostElemClientRect, targetElemClientRect, primaryPlacement, availablePlacementArr) {
let html = document.documentElement;
// check for left-bottom
if ((window.innerWidth || html.clientWidth) - hostElemClientRect.left >= targetElemClientRect.width) {
availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-left');
}
if (targetElemClientRect.width <= hostElemClientRect.right) {
availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-right');
}
}
}
const positionService = new Positioning();
/*
* Accept the placement array and applies the appropriate placement dependent on the viewport.
* Returns the applied placement.
* In case of auto placement, placements are selected in order
* 'top', 'bottom', 'left', 'right',
* 'top-left', 'top-right',
* 'bottom-left', 'bottom-right',
* 'left-top', 'left-bottom',
* 'right-top', 'right-bottom'.
* */
export function positionElements(hostElement, targetElement, placement, appendToBody) {
let placementVals = Array.isArray(placement) ? placement : [placement];
// replace auto placement with other placements
let hasAuto = placementVals.findIndex(val => val === 'auto');
if (hasAuto >= 0) {
['top', 'bottom', 'left', 'right', 'top-left', 'top-right', 'bottom-left', 'bottom-right', 'left-top',
'left-bottom', 'right-top', 'right-bottom',
].forEach(function (obj) {
if (placementVals.find(val => val.search('^' + obj) !== -1) == null) {
placementVals.splice(hasAuto++, 1, obj);
}
});
}
// coordinates where to position
let topVal = 0, leftVal = 0;
let appliedPlacement;
// get available placements
let availablePlacements = positionService.getAvailablePlacements(hostElement, targetElement);
// iterate over all the passed placements
for (let { item, index } of toItemIndexes(placementVals)) {
// check if passed placement is present in the available placement or otherwise apply the last placement in the
// passed placement list
if ((availablePlacements.find(val => val === item) != null) || (placementVals.length === index + 1)) {
appliedPlacement = item;
const pos = positionService.positionElements(hostElement, targetElement, item, appendToBody);
topVal = pos.top;
leftVal = pos.left;
break;
}
}
targetElement.style.top = `${topVal}px`;
targetElement.style.left = `${leftVal}px`;
return appliedPlacement;
}
// function to get index and item of an array
function toItemIndexes(a) {
return a.map((item, index) => ({ item, index }));
}
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previous version:\n// https://github.com/angular-ui/bootstrap/blob/07c31d0731f7cb068a1932b8e01d2312b796b4ec/src/position/position.js\ninterface Rect {\n  width: number,\n  height: number,\n  top: number,\n  bottom: number,\n  left: number,\n  right: number\n}\n\nexport class Positioning {\n  private getAllStyles(element: HTMLElement): {[b: string]: any} { return window.getComputedStyle(element); }\n\n  private getStyle(element: HTMLElement, prop: string): string { return this.getAllStyles(element)[prop]; }\n\n  private isStaticPositioned(element: HTMLElement): boolean {\n    return (this.getStyle(element, 'position') || 'static') === 'static';\n  }\n\n  private offsetParent(element: HTMLElement): HTMLElement {\n    let offsetParentEl = <HTMLElement>element.offsetParent || document.documentElement;\n\n    while (offsetParentEl && offsetParentEl !== document.documentElement && this.isStaticPositioned(offsetParentEl)) {\n      offsetParentEl = <HTMLElement>offsetParentEl.offsetParent;\n    }\n\n    return offsetParentEl || document.documentElement;\n  }\n\n  position(element: HTMLElement, round = true): Rect {\n    let elPosition: Rect;\n    let parentOffset = {width: 0, height: 0, top: 0, bottom: 0, left: 0, right: 0};\n\n    if (this.getStyle(element, 'position') === 'fixed') {\n      elPosition = element.getBoundingClientRect();\n    } else {\n      const offsetParentEl = this.offsetParent(element);\n\n      elPosition = this.offset(element, false);\n\n      if (offsetParentEl !== document.documentElement) {\n        parentOffset = this.offset(offsetParentEl, false);\n      }\n\n      parentOffset.top += offsetParentEl.clientTop;\n      parentOffset.left += offsetParentEl.clientLeft;\n    }\n\n    elPosition.top -= parentOffset.top;\n    elPosition.bottom -= parentOffset.top;\n    elPosition.left -= parentOffset.left;\n    elPosition.right -= parentOffset.left;\n\n    if (round) {\n      elPosition.top = Math.round(elPosition.top);\n      elPosition.bottom = Math.round(elPosition.bottom);\n      elPosition.left = Math.round(elPosition.left);\n      elPosition.right = Math.round(elPosition.right);\n    }\n\n    return elPosition;\n  }\n\n  offset(element: HTMLElement, round = true): Rect {\n    const elBcr = element.getBoundingClientRect();\n    const viewportOffset = {\n      top: window.pageYOffset - document.documentElement.clientTop,\n      left: window.pageXOffset - document.documentElement.clientLeft\n    };\n\n    let elOffset: Rect = {\n      height: elBcr.height || element.offsetHeight,\n      width: elBcr.width || element.offsetWidth,\n      top: elBcr.top + viewportOffset.top,\n      bottom: elBcr.bottom + viewportOffset.top,\n      left: elBcr.left + viewportOffset.left,\n      right: elBcr.right + viewportOffset.left\n    };\n\n    if (round) {\n      elOffset.height = Math.round(elOffset.height);\n      elOffset.width = Math.round(elOffset.width);\n      elOffset.top = Math.round(elOffset.top);\n      elOffset.bottom = Math.round(elOffset.bottom);\n      elOffset.left = Math.round(elOffset.left);\n      elOffset.right = Math.round(elOffset.right);\n    }\n\n    return elOffset;\n  }\n\n  positionElements(hostElement: HTMLElement, targetElement: HTMLElement, placement: string, appendToBody?: boolean): Rect {\n    const hostElPosition = appendToBody ? this.offset(hostElement, false) : this.position(hostElement, false);\n    const targetElStyles = this.getAllStyles(targetElement);\n    const targetElBCR = targetElement.getBoundingClientRect();\n    const placementPrimary = placement.split('-')[0] || 'top';\n    const placementSecondary = placement.split('-')[1] || 'center';\n\n    let targetElPosition: Rect = {\n      'height': targetElBCR.height || targetElement.offsetHeight,\n      'width': targetElBCR.width || targetElement.offsetWidth,\n      'top': 0,\n      'bottom': targetElBCR.height || targetElement.offsetHeight,\n      'left': 0,\n      'right': targetElBCR.width || targetElement.offsetWidth\n    };\n\n    switch (placementPrimary) {\n      case 'top':\n        targetElPosition.top =\n            hostElPosition.top - (targetElement.offsetHeight + parseFloat(targetElStyles['marginBottom']));\n        break;\n      case 'bottom':\n        targetElPosition.top = hostElPosition.top + hostElPosition.height;\n        break;\n      case 'left':\n        targetElPosition.left =\n            hostElPosition.left - (targetElement.offsetWidth + parseFloat(targetElStyles['marginRight']));\n        break;\n      case 'right':\n        targetElPosition.left = hostElPosition.left + hostElPosition.width;\n        break;\n    }\n\n    switch (placementSecondary) {\n      case 'top':\n        targetElPosition.top = hostElPosition.top;\n        break;\n      case 'bottom':\n        targetElPosition.top = hostElPosition.top + hostElPosition.height - targetElement.offsetHeight;\n        break;\n      case 'left':\n        targetElPosition.left = hostElPosition.left;\n        break;\n      case 'right':\n        targetElPosition.left = hostElPosition.left + hostElPosition.width - targetElement.offsetWidth;\n        break;\n      case 'center':\n        if (placementPrimary === 'top' || placementPrimary === 'bottom') {\n          targetElPosition.left = hostElPosition.left + hostElPosition.width / 2 - targetElement.offsetWidth / 2;\n        } else {\n          targetElPosition.top = hostElPosition.top + hostElPosition.height / 2 - targetElement.offsetHeight / 2;\n        }\n        break;\n    }\n\n    targetElPosition.top = Math.round(targetElPosition.top);\n    targetElPosition.bottom = Math.round(targetElPosition.bottom);\n    targetElPosition.left = Math.round(targetElPosition.left);\n    targetElPosition.right = Math.round(targetElPosition.right);\n\n    return targetElPosition;\n  }\n\n  // get the available placements of the target element in the viewport depending on the host element\n  getAvailablePlacements(hostElement: HTMLElement, targetElement: HTMLElement): string[] {\n    let availablePlacements: Array<string> = [];\n    let hostElemClientRect = hostElement.getBoundingClientRect();\n    let targetElemClientRect = targetElement.getBoundingClientRect();\n    let html = document.documentElement;\n    let windowHeight = window.innerHeight || html.clientHeight;\n    let windowWidth = window.innerWidth || html.clientWidth;\n    let hostElemClientRectHorCenter = hostElemClientRect.left + hostElemClientRect.width / 2;\n    let hostElemClientRectVerCenter = hostElemClientRect.top + hostElemClientRect.height / 2;\n\n    // left: check if target width can be placed between host left and viewport start and also height of target is\n    // inside viewport\n    if (targetElemClientRect.width < hostElemClientRect.left) {\n      // check for left only\n      if (hostElemClientRectVerCenter > targetElemClientRect.height / 2 &&\n          windowHeight - hostElemClientRectVerCenter > targetElemClientRect.height / 2) {\n        availablePlacements.splice(availablePlacements.length, 1, 'left');\n      }\n      // check for left-top and left-bottom\n      this.setSecondaryPlacementForLeftRight(hostElemClientRect, targetElemClientRect, 'left', availablePlacements);\n    }\n\n    // top: target height is less than host top\n    if (targetElemClientRect.height < hostElemClientRect.top) {\n      if (hostElemClientRectHorCenter > targetElemClientRect.width / 2 &&\n          windowWidth - hostElemClientRectHorCenter > targetElemClientRect.width / 2) {\n        availablePlacements.splice(availablePlacements.length, 1, 'top');\n      }\n      this.setSecondaryPlacementForTopBottom(hostElemClientRect, targetElemClientRect, 'top', availablePlacements);\n    }\n\n    // right: check if target width can be placed between host right and viewport end and also height of target is\n    // inside viewport\n    if (windowWidth - hostElemClientRect.right > targetElemClientRect.width) {\n      // check for right only\n      if (hostElemClientRectVerCenter > targetElemClientRect.height / 2 &&\n          windowHeight - hostElemClientRectVerCenter > targetElemClientRect.height / 2) {\n        availablePlacements.splice(availablePlacements.length, 1, 'right');\n      }\n      // check for right-top and right-bottom\n      this.setSecondaryPlacementForLeftRight(hostElemClientRect, targetElemClientRect, 'right', availablePlacements);\n    }\n\n    // bottom: check if there is enough space between host bottom and viewport end for target height\n    if (windowHeight - hostElemClientRect.bottom > targetElemClientRect.height) {\n      if (hostElemClientRectHorCenter > targetElemClientRect.width / 2 &&\n          windowWidth - hostElemClientRectHorCenter > targetElemClientRect.width / 2) {\n        availablePlacements.splice(availablePlacements.length, 1, 'bottom');\n      }\n      this.setSecondaryPlacementForTopBottom(hostElemClientRect, targetElemClientRect, 'bottom', availablePlacements);\n    }\n\n    return availablePlacements;\n  }\n\n  /**\n   * check if secondary placement for left and right are available i.e. left-top, left-bottom, right-top, right-bottom\n   * primaryplacement: left|right\n   * availablePlacementArr: array in which available placements to be set\n   */\n  private setSecondaryPlacementForLeftRight(\n      hostElemClientRect: ClientRect, targetElemClientRect: ClientRect, primaryPlacement: string,\n      availablePlacementArr: Array<string>) {\n    let html = document.documentElement;\n    // check for left-bottom\n    if (targetElemClientRect.height <= hostElemClientRect.bottom) {\n      availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-bottom');\n    }\n    if ((window.innerHeight || html.clientHeight) - hostElemClientRect.top >= targetElemClientRect.height) {\n      availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-top');\n    }\n  }\n\n  /**\n   * check if secondary placement for top and bottom are available i.e. top-left, top-right, bottom-left, bottom-right\n   * primaryplacement: top|bottom\n   * availablePlacementArr: array in which available placements to be set\n   */\n  private setSecondaryPlacementForTopBottom(\n      hostElemClientRect: ClientRect, targetElemClientRect: ClientRect, primaryPlacement: string,\n      availablePlacementArr: Array<string>) {\n    let html = document.documentElement;\n    // check for left-bottom\n    if ((window.innerWidth || html.clientWidth) - hostElemClientRect.left >= targetElemClientRect.width) {\n      availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-left');\n    }\n    if (targetElemClientRect.width <= hostElemClientRect.right) {\n      availablePlacementArr.splice(availablePlacementArr.length, 1, primaryPlacement + '-right');\n    }\n  }\n}\n\nconst positionService = new Positioning();\n\n/*\n * Accept the placement array and applies the appropriate placement dependent on the viewport.\n * Returns the applied placement.\n * In case of auto placement, placements are selected in order\n *   'top', 'bottom', 'left', 'right',\n *   'top-left', 'top-right',\n *   'bottom-left', 'bottom-right',\n *   'left-top', 'left-bottom',\n *   'right-top', 'right-bottom'.\n * */\nexport function positionElements(\n    hostElement: HTMLElement, targetElement: HTMLElement, placement: string | Placement | PlacementArray,\n    appendToBody?: boolean): Placement {\n  let placementVals: Array<Placement> = Array.isArray(placement) ? placement : [placement as Placement];\n\n  // replace auto placement with other placements\n  let hasAuto = placementVals.findIndex(val => val === 'auto');\n  if (hasAuto >= 0) {\n    ['top', 'bottom', 'left', 'right', 'top-left', 'top-right', 'bottom-left', 'bottom-right', 'left-top',\n     'left-bottom', 'right-top', 'right-bottom',\n    ].forEach(function(obj) {\n      if (placementVals.find(val => val.search('^' + obj) !== -1) == null) {\n        placementVals.splice(hasAuto++, 1, obj as Placement);\n      }\n    });\n  }\n\n  // coordinates where to position\n  let topVal = 0, leftVal = 0;\n  let appliedPlacement!: Placement;\n  // get available placements\n  let availablePlacements = positionService.getAvailablePlacements(hostElement, targetElement);\n  // iterate over all the passed placements\n  for (let { item, index } of toItemIndexes(placementVals)) {\n    // check if passed placement is present in the available placement or otherwise apply the last placement in the\n    // passed placement list\n    if ((availablePlacements.find(val => val === item) != null) || (placementVals.length === index + 1)) {\n      appliedPlacement = <Placement>item;\n      const pos = positionService.positionElements(hostElement, targetElement, item, appendToBody);\n      topVal = pos.top;\n      leftVal = pos.left;\n      break;\n    }\n  }\n  targetElement.style.top = `${topVal}px`;\n  targetElement.style.left = `${leftVal}px`;\n  return appliedPlacement;\n}\n\n// function to get index and item of an array\nfunction toItemIndexes<T>(a: T[]) {\n  return a.map((item, index) => ({item, index}));\n}\n\nexport type Placement = 'auto' | 'top' | 'bottom' | 'left' | 'right' | 'top-left' | 'top-right' | 'bottom-left' |\n    'bottom-right' | 'left-top' | 'left-bottom' | 'right-top' | 'right-bottom';\n\nexport type PlacementArray = Placement | Array<Placement>;\n"]}