"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var React = require("react");
var BaseDecorator_1 = require("./BaseDecorator");
var Utilities_1 = require("../../Utilities");
var RESIZE_DELAY = 500;
var MAX_RESIZE_ATTEMPTS = 3;
function withViewport(ComposedComponent) {
    return (function (_super) {
        tslib_1.__extends(WithViewportComponent, _super);
        function WithViewportComponent() {
            var _this = _super.call(this) || this;
            /* Note: using lambda here because decorators don't seem to work in decorators. */
            _this._updateViewport = function (withForceUpdate) {
                var viewport = _this.state.viewport;
                var viewportElement = _this.refs.root;
                var scrollElement = Utilities_1.findScrollableParent(viewportElement);
                var scrollRect = Utilities_1.getRect(scrollElement);
                var clientRect = Utilities_1.getRect(viewportElement);
                var updateComponent = function () {
                    if (withForceUpdate && _this._composedComponentInstance) {
                        _this._composedComponentInstance.forceUpdate();
                    }
                };
                var isSizeChanged = ((clientRect && clientRect.width) !== viewport.width ||
                    (scrollRect && scrollRect.height) !== viewport.height);
                if (isSizeChanged && _this._resizeAttempts < MAX_RESIZE_ATTEMPTS && clientRect && scrollRect) {
                    _this._resizeAttempts++;
                    _this.setState({
                        viewport: {
                            width: clientRect.width,
                            height: scrollRect.height
                        }
                    }, function () { _this._updateViewport(withForceUpdate); });
                }
                else {
                    _this._resizeAttempts = 0;
                    updateComponent();
                }
            };
            _this._resizeAttempts = 0;
            _this.state = {
                viewport: {
                    width: 0,
                    height: 0
                }
            };
            return _this;
        }
        WithViewportComponent.prototype.componentDidMount = function () {
            this._onAsyncResize = this._async.debounce(this._onAsyncResize, RESIZE_DELAY, {
                leading: false
            });
            this._events.on(window, 'resize', this._onAsyncResize);
            var skipViewportMeasures = this.props.skipViewportMeasures;
            if (!skipViewportMeasures) {
                this._updateViewport();
            }
        };
        WithViewportComponent.prototype.componentWillUnmount = function () {
            this._events.dispose();
        };
        WithViewportComponent.prototype.render = function () {
            var viewport = this.state.viewport;
            var skipViewportMeasures = this.props.skipViewportMeasures;
            var isViewportVisible = skipViewportMeasures || (viewport.width > 0 && viewport.height > 0);
            return (React.createElement("div", { className: 'ms-Viewport', ref: 'root', style: { minWidth: 1, minHeight: 1 } }, isViewportVisible && (React.createElement(ComposedComponent, tslib_1.__assign({ ref: this._updateComposedComponentRef, viewport: viewport }, this.props)))));
        };
        WithViewportComponent.prototype.forceUpdate = function () {
            this._updateViewport(true);
        };
        WithViewportComponent.prototype._onAsyncResize = function () {
            this._updateViewport();
        };
        return WithViewportComponent;
    }(BaseDecorator_1.BaseDecorator));
}
exports.withViewport = withViewport;
//# sourceMappingURL=withViewport.js.map