define(["require", "exports", "tslib", "react", "../../Utilities"], function (require, exports, tslib_1, React, Utilities_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    /**
     * This adds accessibility to Dialog and Panel controls
     */
    var Popup = /** @class */ (function (_super) {
        tslib_1.__extends(Popup, _super);
        function Popup(props) {
            var _this = _super.call(this, props) || this;
            _this._root = React.createRef();
            _this._onKeyDown = function (ev) {
                switch (ev.which) {
                    case Utilities_1.KeyCodes.escape:
                        if (_this.props.onDismiss) {
                            _this.props.onDismiss(ev);
                            ev.preventDefault();
                            ev.stopPropagation();
                        }
                        break;
                }
            };
            _this.state = { needsVerticalScrollBar: false };
            return _this;
        }
        Popup.prototype.componentWillMount = function () {
            this._originalFocusedElement = Utilities_1.getDocument().activeElement;
        };
        Popup.prototype.componentDidMount = function () {
            if (!this._root.current) {
                return;
            }
            this._events.on(this._root.current, 'focus', this._onFocus, true);
            this._events.on(this._root.current, 'blur', this._onBlur, true);
            if (Utilities_1.doesElementContainFocus(this._root.current)) {
                this._containsFocus = true;
            }
            this._updateScrollBarAsync();
        };
        Popup.prototype.componentDidUpdate = function () {
            this._updateScrollBarAsync();
        };
        Popup.prototype.componentWillUnmount = function () {
            if (this.props.shouldRestoreFocus &&
                this._originalFocusedElement &&
                this._containsFocus &&
                this._originalFocusedElement !== window) {
                // This slight delay is required so that we can unwind the stack, let react try to mess with focus, and then
                // apply the correct focus. Without the setTimeout, we end up focusing the correct thing, and then React wants
                // to reset the focus back to the thing it thinks should have been focused.
                if (this._originalFocusedElement) {
                    this._originalFocusedElement.focus();
                }
            }
        };
        Popup.prototype.render = function () {
            var _a = this.props, role = _a.role, className = _a.className, ariaLabel = _a.ariaLabel, ariaLabelledBy = _a.ariaLabelledBy, ariaDescribedBy = _a.ariaDescribedBy, style = _a.style;
            return (React.createElement("div", tslib_1.__assign({ tabIndex: -1, ref: this._root }, Utilities_1.getNativeProps(this.props, Utilities_1.divProperties), { className: className, role: role, "aria-label": ariaLabel, "aria-labelledby": ariaLabelledBy, "aria-describedby": ariaDescribedBy, onKeyDown: this._onKeyDown, style: tslib_1.__assign({ overflowY: this.state.needsVerticalScrollBar ? 'scroll' : undefined, outline: 'none' }, style) }), this.props.children));
        };
        Popup.prototype._updateScrollBarAsync = function () {
            var _this = this;
            this._async.requestAnimationFrame(function () {
                _this._getScrollBar();
            });
        };
        Popup.prototype._getScrollBar = function () {
            // If overflowY is overriden, don't waste time calculating whether the scrollbar is necessary.
            if (this.props.style && this.props.style.overflowY) {
                return;
            }
            var needsVerticalScrollBar = false;
            if (this._root && this._root.current && this._root.current.firstElementChild) {
                // ClientHeight returns the client height of an element rounded to an
                // integer. On some browsers at different zoom levels this rounding
                // can generate different results for the root container and child even
                // though they are the same height. This causes us to show a scroll bar
                // when not needed. Ideally we would use BoundingClientRect().height
                // instead however seems that the API is 90% slower than using ClientHeight.
                // Therefore instead we will calculate the difference between heights and
                // allow for a 1px difference to still be considered ok and not show the
                // scroll bar.
                var rootHeight = this._root.current.clientHeight;
                var firstChildHeight = this._root.current.firstElementChild.clientHeight;
                if (rootHeight > 0 && firstChildHeight > rootHeight) {
                    needsVerticalScrollBar = firstChildHeight - rootHeight > 1;
                }
            }
            if (this.state.needsVerticalScrollBar !== needsVerticalScrollBar) {
                this.setState({
                    needsVerticalScrollBar: needsVerticalScrollBar
                });
            }
        };
        Popup.prototype._onFocus = function () {
            this._containsFocus = true;
        };
        Popup.prototype._onBlur = function (ev) {
            if (this._root.current && this._root.current.contains(ev.relatedTarget)) {
                this._containsFocus = false;
            }
        };
        Popup.defaultProps = {
            shouldRestoreFocus: true
        };
        return Popup;
    }(Utilities_1.BaseComponent));
    exports.Popup = Popup;
});
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