@clr/angular
Version:
Angular components for Clarity
267 lines • 35.2 kB
JavaScript
/*
* Copyright (c) 2016-2025 Broadcom. All Rights Reserved.
* The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
* This software is released under MIT license.
* The full license information can be found in LICENSE in the root directory of this project.
*/
import { Subject } from 'rxjs';
export var Point;
(function (Point) {
Point[Point["RIGHT_CENTER"] = 0] = "RIGHT_CENTER";
Point[Point["RIGHT_TOP"] = 1] = "RIGHT_TOP";
Point[Point["RIGHT_BOTTOM"] = 2] = "RIGHT_BOTTOM";
Point[Point["TOP_CENTER"] = 3] = "TOP_CENTER";
Point[Point["TOP_RIGHT"] = 4] = "TOP_RIGHT";
Point[Point["TOP_LEFT"] = 5] = "TOP_LEFT";
Point[Point["BOTTOM_CENTER"] = 6] = "BOTTOM_CENTER";
Point[Point["BOTTOM_RIGHT"] = 7] = "BOTTOM_RIGHT";
Point[Point["BOTTOM_LEFT"] = 8] = "BOTTOM_LEFT";
Point[Point["LEFT_CENTER"] = 9] = "LEFT_CENTER";
Point[Point["LEFT_TOP"] = 10] = "LEFT_TOP";
Point[Point["LEFT_BOTTOM"] = 11] = "LEFT_BOTTOM";
})(Point || (Point = {}));
const POSITION_RELATIVE = 'relative';
const POSITION_ABSOLUTE = 'absolute';
const POSITION_FIXED = 'fixed';
const OVERFLOW_SCROLL = 'scroll';
const OVERFLOW_AUTO = 'auto';
export class Popover {
constructor(element) {
this.element = element;
this.boundOnScrollListener = this.emitScrollEvent.bind(this);
/*
* Containers up to the first positioned one will have an event on scroll
*/
this.scrollableElements = [];
// Browsers don't agree with what to do if some of these are not specified, so we set them all to be safe.
element.style.position = POSITION_ABSOLUTE;
element.style.top = 0;
element.style.bottom = 'auto';
element.style.left = 0;
element.style.right = 'auto';
}
// TODO: need a way to account for parameters that change dynamically (positioning).
anchor(anchor, anchorAlign, popoverAlign, { offsetX = 0, offsetY = 0, useAnchorParent = false } = {}) {
// TODO: we are assuming here that the popover is inside or next to the anchor.
// We'd need to go up the popover tree too otherwise
this.addScrollEventListeners(anchor);
if (useAnchorParent) {
anchor = anchor.parentNode;
}
// explicitly override anchor's style to static
anchor.style.position = 'static';
const anchorRect = anchor.getBoundingClientRect();
const popoverRect = this.element.getBoundingClientRect();
// position of left top corner of anchor + the offset
let leftDiff = anchorRect.left - popoverRect.left + offsetX;
let topDiff = anchorRect.top - popoverRect.top + offsetY;
// first, adjust positioning based on anchor's align point
switch (anchorAlign) {
case Point.LEFT_TOP:
case Point.TOP_LEFT:
break;
case Point.TOP_CENTER:
leftDiff += anchorRect.width / 2;
break;
case Point.TOP_RIGHT:
leftDiff += anchorRect.width;
break;
case Point.RIGHT_TOP:
leftDiff += anchorRect.width;
break;
case Point.LEFT_BOTTOM:
topDiff += anchorRect.height;
break;
case Point.BOTTOM_LEFT:
topDiff += anchorRect.height;
break;
case Point.BOTTOM_CENTER:
topDiff += anchorRect.height;
leftDiff += anchorRect.width / 2;
break;
case Point.BOTTOM_RIGHT:
topDiff += anchorRect.height;
leftDiff += anchorRect.width;
break;
case Point.RIGHT_BOTTOM:
topDiff += anchorRect.height;
leftDiff += anchorRect.width;
break;
case Point.LEFT_CENTER:
topDiff += anchorRect.height / 2;
break;
case Point.RIGHT_CENTER:
topDiff += anchorRect.height / 2;
leftDiff += anchorRect.width;
break;
default:
}
// second, adjust positioning based on popover's align point
switch (popoverAlign) {
case Point.LEFT_TOP:
case Point.TOP_LEFT:
break;
case Point.TOP_CENTER:
leftDiff -= popoverRect.width / 2;
break;
case Point.TOP_RIGHT:
leftDiff -= popoverRect.width;
break;
case Point.RIGHT_TOP:
leftDiff -= popoverRect.width;
break;
case Point.LEFT_BOTTOM:
topDiff -= popoverRect.height;
break;
case Point.BOTTOM_LEFT:
topDiff -= popoverRect.height;
break;
case Point.BOTTOM_CENTER:
topDiff -= popoverRect.height;
leftDiff -= popoverRect.width / 2;
break;
case Point.BOTTOM_RIGHT:
topDiff -= popoverRect.height;
leftDiff -= popoverRect.width;
break;
case Point.RIGHT_BOTTOM:
topDiff -= popoverRect.height;
leftDiff -= popoverRect.width;
break;
case Point.LEFT_CENTER:
topDiff -= popoverRect.height / 2;
break;
case Point.RIGHT_CENTER:
topDiff -= popoverRect.height / 2;
leftDiff -= popoverRect.width;
break;
default:
}
// Third, adjust with popover's margins based on the two align points.
// Here, we make an assumption that popover is primarily positioned outside the
// anchor with minor offset. Without this assumption, it's impossible to apply
// the popover's margins in a predictable way. For example, assume that a popover
// and its anchor are exactly the same size. if a popover is positioned inside the
// anchor (which is technically possible), then it becomes impossible to know what to do
// if the popover has a non-zero margin value all around (because applying the margin in
// all four directions will result in no margin visually, which isn't what we want).
// Therefore, our logic makes assumptions about margins of interest given the points,
// and only covers the cases where popover is outside the anchor.
const popoverComputedStyle = getComputedStyle(this.element);
const marginLeft = parseInt(popoverComputedStyle.marginLeft, 10);
const marginRight = parseInt(popoverComputedStyle.marginRight, 10);
const marginTop = parseInt(popoverComputedStyle.marginTop, 10);
const marginBottom = parseInt(popoverComputedStyle.marginBottom, 10);
switch (anchorAlign) {
case Point.LEFT_TOP:
case Point.TOP_LEFT:
case Point.TOP_RIGHT:
case Point.RIGHT_TOP:
if (popoverAlign === Point.BOTTOM_RIGHT || popoverAlign === Point.RIGHT_BOTTOM) {
topDiff -= marginBottom;
leftDiff -= marginRight;
}
if (popoverAlign === Point.BOTTOM_LEFT || popoverAlign === Point.LEFT_BOTTOM) {
topDiff -= marginTop;
leftDiff += marginLeft;
}
if (popoverAlign === Point.TOP_LEFT || popoverAlign === Point.LEFT_TOP) {
topDiff += marginTop;
leftDiff += marginLeft;
}
if (popoverAlign === Point.TOP_RIGHT || popoverAlign === Point.RIGHT_TOP) {
topDiff += marginTop;
leftDiff -= marginRight;
}
break;
case Point.LEFT_BOTTOM:
case Point.BOTTOM_LEFT:
case Point.BOTTOM_RIGHT:
case Point.RIGHT_BOTTOM:
if (popoverAlign === Point.BOTTOM_LEFT || popoverAlign === Point.LEFT_BOTTOM) {
topDiff -= marginBottom;
leftDiff += marginLeft;
}
if (popoverAlign === Point.BOTTOM_RIGHT || popoverAlign === Point.RIGHT_BOTTOM) {
topDiff -= marginBottom;
leftDiff -= marginRight;
}
if (popoverAlign === Point.TOP_LEFT || popoverAlign === Point.LEFT_TOP) {
topDiff += marginTop;
leftDiff += marginLeft;
}
if (popoverAlign === Point.TOP_RIGHT || popoverAlign === Point.RIGHT_TOP) {
topDiff += marginTop;
leftDiff -= marginRight;
}
break;
case Point.TOP_CENTER:
topDiff -= marginBottom;
leftDiff += marginLeft;
leftDiff -= marginRight;
break;
case Point.BOTTOM_CENTER:
topDiff += marginTop;
leftDiff += marginLeft;
leftDiff -= marginRight;
break;
case Point.LEFT_CENTER:
topDiff += marginTop;
topDiff -= marginBottom;
leftDiff -= marginRight;
break;
case Point.RIGHT_CENTER:
topDiff += marginTop;
topDiff -= marginBottom;
leftDiff += marginLeft;
break;
default:
}
this.element.style.transform = `translateX(${Math.round(leftDiff)}px) translateY(${Math.round(topDiff)}px)`;
return this._scroll.asObservable();
}
release() {
this.element.style.transform = '';
this.removeScrollEventListeners();
}
isPositioned(container) {
const position = getComputedStyle(container).position;
return position === POSITION_RELATIVE || position === POSITION_ABSOLUTE || position === POSITION_FIXED;
}
emitScrollEvent() {
this._scroll.next();
}
addScrollEventListeners(e) {
this._scroll = new Subject();
const anchor = e;
let current = e;
while (current && current !== document && current.nodeType === Node.ELEMENT_NODE) {
if (this.scrolls(current)) {
current.addEventListener('scroll', this.boundOnScrollListener);
this.scrollableElements.push(current);
}
if (current !== anchor && this.isPositioned(current)) {
break;
}
current = current.parentNode;
}
}
removeScrollEventListeners() {
for (const elem of this.scrollableElements) {
elem.removeEventListener('scroll', this.boundOnScrollListener);
}
this.scrollableElements.length = 0;
if (this._scroll) {
this._scroll.complete();
delete this._scroll;
}
}
scrolls(container) {
const computedStyles = getComputedStyle(container);
return (computedStyles.overflowX === OVERFLOW_SCROLL ||
computedStyles.overflowX === OVERFLOW_AUTO ||
computedStyles.overflowY === OVERFLOW_SCROLL ||
computedStyles.overflowY === OVERFLOW_AUTO);
}
}
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* Copyright (c) 2016-2025 Broadcom. All Rights Reserved.\n * The term \"Broadcom\" refers to Broadcom Inc. and/or its subsidiaries.\n * This software is released under MIT license.\n * The full license information can be found in LICENSE in the root directory of this project.\n */\n\n/*\n * Do NOT Angular this up. It assumes we're in the DOM, plays with native elements, ...\n * It could potentially be used as part of @clr/ui as a vanilla Javascript helper.\n */\n\nimport { Observable } from 'rxjs';\nimport { Subject } from 'rxjs';\n\nimport { PopoverOptions } from './popover-options.interface';\nexport enum Point {\n  RIGHT_CENTER,\n  RIGHT_TOP,\n  RIGHT_BOTTOM,\n  TOP_CENTER,\n  TOP_RIGHT,\n  TOP_LEFT,\n  BOTTOM_CENTER,\n  BOTTOM_RIGHT,\n  BOTTOM_LEFT,\n  LEFT_CENTER,\n  LEFT_TOP,\n  LEFT_BOTTOM,\n}\n\nconst POSITION_RELATIVE = 'relative';\nconst POSITION_ABSOLUTE = 'absolute';\nconst POSITION_FIXED = 'fixed';\n\nconst OVERFLOW_SCROLL = 'scroll';\nconst OVERFLOW_AUTO = 'auto';\n\nexport class Popover {\n  private _scroll: Subject<void>;\n  private boundOnScrollListener: any = this.emitScrollEvent.bind(this);\n\n  /*\n   * Containers up to the first positioned one will have an event on scroll\n   */\n  private scrollableElements: HTMLElement[] = [];\n\n  constructor(private element: any) {\n    // Browsers don't agree with what to do if some of these are not specified, so we set them all to be safe.\n    element.style.position = POSITION_ABSOLUTE;\n    element.style.top = 0;\n    element.style.bottom = 'auto';\n    element.style.left = 0;\n    element.style.right = 'auto';\n  }\n\n  // TODO: need a way to account for parameters that change dynamically (positioning).\n  anchor(\n    anchor: any,\n    anchorAlign: Point,\n    popoverAlign: Point,\n    { offsetX = 0, offsetY = 0, useAnchorParent = false }: PopoverOptions = {}\n  ): Observable<any> {\n    // TODO: we are assuming here that the popover is inside or next to the anchor.\n    // We'd need to go up the popover tree too otherwise\n\n    this.addScrollEventListeners(anchor);\n    if (useAnchorParent) {\n      anchor = anchor.parentNode;\n    }\n    // explicitly override anchor's style to static\n    anchor.style.position = 'static';\n\n    const anchorRect = anchor.getBoundingClientRect();\n    const popoverRect = this.element.getBoundingClientRect();\n\n    // position of left top corner of anchor + the offset\n    let leftDiff: number = anchorRect.left - popoverRect.left + offsetX;\n    let topDiff: number = anchorRect.top - popoverRect.top + offsetY;\n\n    // first, adjust positioning based on anchor's align point\n    switch (anchorAlign) {\n      case Point.LEFT_TOP:\n      case Point.TOP_LEFT:\n        break;\n      case Point.TOP_CENTER:\n        leftDiff += anchorRect.width / 2;\n        break;\n      case Point.TOP_RIGHT:\n        leftDiff += anchorRect.width;\n        break;\n      case Point.RIGHT_TOP:\n        leftDiff += anchorRect.width;\n        break;\n      case Point.LEFT_BOTTOM:\n        topDiff += anchorRect.height;\n        break;\n      case Point.BOTTOM_LEFT:\n        topDiff += anchorRect.height;\n        break;\n      case Point.BOTTOM_CENTER:\n        topDiff += anchorRect.height;\n        leftDiff += anchorRect.width / 2;\n        break;\n      case Point.BOTTOM_RIGHT:\n        topDiff += anchorRect.height;\n        leftDiff += anchorRect.width;\n        break;\n      case Point.RIGHT_BOTTOM:\n        topDiff += anchorRect.height;\n        leftDiff += anchorRect.width;\n        break;\n      case Point.LEFT_CENTER:\n        topDiff += anchorRect.height / 2;\n        break;\n      case Point.RIGHT_CENTER:\n        topDiff += anchorRect.height / 2;\n        leftDiff += anchorRect.width;\n        break;\n      default:\n    }\n\n    // second, adjust positioning based on popover's align point\n    switch (popoverAlign) {\n      case Point.LEFT_TOP:\n      case Point.TOP_LEFT:\n        break;\n      case Point.TOP_CENTER:\n        leftDiff -= popoverRect.width / 2;\n        break;\n      case Point.TOP_RIGHT:\n        leftDiff -= popoverRect.width;\n        break;\n      case Point.RIGHT_TOP:\n        leftDiff -= popoverRect.width;\n        break;\n      case Point.LEFT_BOTTOM:\n        topDiff -= popoverRect.height;\n        break;\n      case Point.BOTTOM_LEFT:\n        topDiff -= popoverRect.height;\n        break;\n      case Point.BOTTOM_CENTER:\n        topDiff -= popoverRect.height;\n        leftDiff -= popoverRect.width / 2;\n        break;\n      case Point.BOTTOM_RIGHT:\n        topDiff -= popoverRect.height;\n        leftDiff -= popoverRect.width;\n        break;\n      case Point.RIGHT_BOTTOM:\n        topDiff -= popoverRect.height;\n        leftDiff -= popoverRect.width;\n        break;\n      case Point.LEFT_CENTER:\n        topDiff -= popoverRect.height / 2;\n        break;\n      case Point.RIGHT_CENTER:\n        topDiff -= popoverRect.height / 2;\n        leftDiff -= popoverRect.width;\n        break;\n      default:\n    }\n\n    // Third, adjust with popover's margins based on the two align points.\n    // Here, we make an assumption that popover is primarily positioned outside the\n    // anchor with minor offset. Without this assumption, it's impossible to apply\n    // the popover's margins in a predictable way. For example, assume that a popover\n    // and its anchor are exactly the same size. if a popover is positioned inside the\n    // anchor (which is technically possible), then it becomes impossible to know what to do\n    // if the popover has a non-zero margin value all around (because applying the margin in\n    // all four directions will result in no margin visually, which isn't what we want).\n    // Therefore, our logic makes assumptions about margins of interest given the points,\n    // and only covers the cases where popover is outside the anchor.\n\n    const popoverComputedStyle = getComputedStyle(this.element);\n    const marginLeft = parseInt(popoverComputedStyle.marginLeft, 10);\n    const marginRight = parseInt(popoverComputedStyle.marginRight, 10);\n    const marginTop = parseInt(popoverComputedStyle.marginTop, 10);\n    const marginBottom = parseInt(popoverComputedStyle.marginBottom, 10);\n\n    switch (anchorAlign) {\n      case Point.LEFT_TOP:\n      case Point.TOP_LEFT:\n      case Point.TOP_RIGHT:\n      case Point.RIGHT_TOP:\n        if (popoverAlign === Point.BOTTOM_RIGHT || popoverAlign === Point.RIGHT_BOTTOM) {\n          topDiff -= marginBottom;\n          leftDiff -= marginRight;\n        }\n        if (popoverAlign === Point.BOTTOM_LEFT || popoverAlign === Point.LEFT_BOTTOM) {\n          topDiff -= marginTop;\n          leftDiff += marginLeft;\n        }\n        if (popoverAlign === Point.TOP_LEFT || popoverAlign === Point.LEFT_TOP) {\n          topDiff += marginTop;\n          leftDiff += marginLeft;\n        }\n        if (popoverAlign === Point.TOP_RIGHT || popoverAlign === Point.RIGHT_TOP) {\n          topDiff += marginTop;\n          leftDiff -= marginRight;\n        }\n        break;\n      case Point.LEFT_BOTTOM:\n      case Point.BOTTOM_LEFT:\n      case Point.BOTTOM_RIGHT:\n      case Point.RIGHT_BOTTOM:\n        if (popoverAlign === Point.BOTTOM_LEFT || popoverAlign === Point.LEFT_BOTTOM) {\n          topDiff -= marginBottom;\n          leftDiff += marginLeft;\n        }\n        if (popoverAlign === Point.BOTTOM_RIGHT || popoverAlign === Point.RIGHT_BOTTOM) {\n          topDiff -= marginBottom;\n          leftDiff -= marginRight;\n        }\n        if (popoverAlign === Point.TOP_LEFT || popoverAlign === Point.LEFT_TOP) {\n          topDiff += marginTop;\n          leftDiff += marginLeft;\n        }\n        if (popoverAlign === Point.TOP_RIGHT || popoverAlign === Point.RIGHT_TOP) {\n          topDiff += marginTop;\n          leftDiff -= marginRight;\n        }\n        break;\n      case Point.TOP_CENTER:\n        topDiff -= marginBottom;\n        leftDiff += marginLeft;\n        leftDiff -= marginRight;\n        break;\n      case Point.BOTTOM_CENTER:\n        topDiff += marginTop;\n        leftDiff += marginLeft;\n        leftDiff -= marginRight;\n        break;\n      case Point.LEFT_CENTER:\n        topDiff += marginTop;\n        topDiff -= marginBottom;\n        leftDiff -= marginRight;\n        break;\n      case Point.RIGHT_CENTER:\n        topDiff += marginTop;\n        topDiff -= marginBottom;\n        leftDiff += marginLeft;\n        break;\n      default:\n    }\n\n    this.element.style.transform = `translateX(${Math.round(leftDiff)}px) translateY(${Math.round(topDiff)}px)`;\n    return this._scroll.asObservable();\n  }\n\n  release() {\n    this.element.style.transform = '';\n    this.removeScrollEventListeners();\n  }\n\n  private isPositioned(container: Element) {\n    const position = getComputedStyle(container).position;\n    return position === POSITION_RELATIVE || position === POSITION_ABSOLUTE || position === POSITION_FIXED;\n  }\n\n  private emitScrollEvent() {\n    this._scroll.next();\n  }\n\n  private addScrollEventListeners(e: any) {\n    this._scroll = new Subject<void>();\n    const anchor: any = e;\n    let current: any = e;\n    while (current && current !== document && current.nodeType === Node.ELEMENT_NODE) {\n      if (this.scrolls(current)) {\n        current.addEventListener('scroll', this.boundOnScrollListener);\n        this.scrollableElements.push(current);\n      }\n      if (current !== anchor && this.isPositioned(current)) {\n        break;\n      }\n      current = current.parentNode;\n    }\n  }\n\n  private removeScrollEventListeners() {\n    for (const elem of this.scrollableElements) {\n      elem.removeEventListener('scroll', this.boundOnScrollListener);\n    }\n    this.scrollableElements.length = 0;\n    if (this._scroll) {\n      this._scroll.complete();\n      delete this._scroll;\n    }\n  }\n\n  private scrolls(container: Element): boolean {\n    const computedStyles = getComputedStyle(container);\n    return (\n      computedStyles.overflowX === OVERFLOW_SCROLL ||\n      computedStyles.overflowX === OVERFLOW_AUTO ||\n      computedStyles.overflowY === OVERFLOW_SCROLL ||\n      computedStyles.overflowY === OVERFLOW_AUTO\n    );\n  }\n}\n"]}