VLEX/BPM-UI/node_modules/ngx-bootstrap/positioning/esm2015/utils/getOffsetRectRelativeToArbitraryNode.js

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import { getBoundingClientRect } from './getBoundingClientRect';
import { getClientRect } from './getClientRect';
import { getScrollParent } from './getScrollParent';
import { getStyleComputedProperty } from './getStyleComputedProperty';
import { includeScroll } from './includeScroll';
import { isIE as runIsIE } from './isIE';
/**
 * @param {?} children
 * @param {?} parent
 * @param {?=} fixedPosition
 * @return {?}
 */
export function getOffsetRectRelativeToArbitraryNode(children, parent, fixedPosition = false) {
    /** @type {?} */
    const isIE10 = runIsIE(10);
    /** @type {?} */
    const isHTML = parent.nodeName === 'HTML';
    /** @type {?} */
    const childrenRect = getBoundingClientRect(children);
    /** @type {?} */
    const parentRect = getBoundingClientRect(parent);
    /** @type {?} */
    const scrollParent = getScrollParent(children);
    /** @type {?} */
    const styles = getStyleComputedProperty(parent);
    /** @type {?} */
    const borderTopWidth = parseFloat(styles.borderTopWidth);
    /** @type {?} */
    const borderLeftWidth = parseFloat(styles.borderLeftWidth);
    // In cases where the parent is fixed, we must ignore negative scroll in offset calc
    if (fixedPosition && isHTML) {
        parentRect.top = Math.max(parentRect.top, 0);
        parentRect.left = Math.max(parentRect.left, 0);
    }
    /** @type {?} */
    let offsets = getClientRect({
        top: childrenRect.top - parentRect.top - borderTopWidth,
        left: childrenRect.left - parentRect.left - borderLeftWidth,
        width: childrenRect.width,
        height: childrenRect.height
    });
    offsets.marginTop = 0;
    offsets.marginLeft = 0;
    // Subtract margins of documentElement in case it's being used as parent
    // we do this only on HTML because it's the only element that behaves
    // differently when margins are applied to it. The margins are included in
    // the box of the documentElement, in the other cases not.
    if (!isIE10 && isHTML) {
        /** @type {?} */
        const marginTop = parseFloat(styles.marginTop);
        /** @type {?} */
        const marginLeft = parseFloat(styles.marginLeft);
        offsets.top -= borderTopWidth - marginTop;
        offsets.bottom -= borderTopWidth - marginTop;
        offsets.left -= borderLeftWidth - marginLeft;
        offsets.right -= borderLeftWidth - marginLeft;
        // Attach marginTop and marginLeft because in some circumstances we may need them
        offsets.marginTop = marginTop;
        offsets.marginLeft = marginLeft;
    }
    if (isIE10 && !fixedPosition
        ? parent.contains(scrollParent)
        : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
        offsets = includeScroll(offsets, parent);
    }
    return offsets;
}
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