devextreme/esm/__internal/ui/overlay/utils.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (esm/__internal/ui/overlay/utils.js)
 * Version: 25.2.3
 * Build date: Fri Dec 12 2025
 *
 * Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */
import $ from "../../../core/renderer";
import {
    getInnerHeight,
    getOuterHeight
} from "../../../core/utils/size";
import {
    isNumeric
} from "../../../core/utils/type";
import {
    getWindow
} from "../../core/utils/m_window";
const WINDOW_HEIGHT_PERCENT = .9;
export const getElementMaxHeightByWindow = ($element, startLocation) => {
    const offset = $element.offset();
    if (void 0 === offset) {
        return
    }
    const $window = $(getWindow());
    const {
        top: elementOffset
    } = offset;
    let actualOffset = 0;
    const windowScrollTop = $window.scrollTop();
    const windowHeight = getInnerHeight($window);
    if (isNumeric(startLocation)) {
        if (startLocation < elementOffset) {
            return elementOffset - startLocation
        }
        actualOffset = windowHeight - startLocation + windowScrollTop
    } else {
        const offsetTop = elementOffset - windowScrollTop;
        const offsetBottom = windowHeight - offsetTop - getOuterHeight($element);
        actualOffset = Math.max(offsetTop, offsetBottom)
    }
    return .9 * actualOffset
};