| 1 | /**
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| 2 | * @license
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| 3 | * Copyright 2018 Google Inc.
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| 4 | *
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| 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy
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| 6 | * of this software and associated documentation files (the "Software"), to deal
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| 7 | * in the Software without restriction, including without limitation the rights
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| 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 9 | * copies of the Software, and to permit persons to whom the Software is
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| 10 | * furnished to do so, subject to the following conditions:
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| 11 | *
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| 12 | * The above copyright notice and this permission notice shall be included in
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| 13 | * all copies or substantial portions of the Software.
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| 14 | *
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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| 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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| 21 | * THE SOFTWARE.
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| 22 | */
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| 23 | import { __extends } from "tslib";
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| 24 | import { cssClasses } from '../constants';
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| 25 | import { MDCTopAppBarFoundation } from '../standard/foundation';
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| 26 | var MDCFixedTopAppBarFoundation = /** @class */ (function (_super) {
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| 27 | __extends(MDCFixedTopAppBarFoundation, _super);
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| 28 | function MDCFixedTopAppBarFoundation() {
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| 29 | var _this = _super !== null && _super.apply(this, arguments) || this;
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| 30 | /**
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| 31 | * State variable for the previous scroll iteration top app bar state
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| 32 | */
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| 33 | _this.wasScrolled = false;
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| 34 | return _this;
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| 35 | }
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| 36 | /**
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| 37 | * Scroll handler for applying/removing the modifier class on the fixed top app bar.
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| 38 | */
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| 39 | MDCFixedTopAppBarFoundation.prototype.handleTargetScroll = function () {
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| 40 | var currentScroll = this.adapter.getViewportScrollY();
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| 41 | if (currentScroll <= 0) {
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| 42 | if (this.wasScrolled) {
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| 43 | this.adapter.removeClass(cssClasses.FIXED_SCROLLED_CLASS);
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| 44 | this.wasScrolled = false;
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| 45 | }
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| 46 | }
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| 47 | else {
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| 48 | if (!this.wasScrolled) {
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| 49 | this.adapter.addClass(cssClasses.FIXED_SCROLLED_CLASS);
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| 50 | this.wasScrolled = true;
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| 51 | }
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| 52 | }
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| 53 | };
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| 54 | return MDCFixedTopAppBarFoundation;
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| 55 | }(MDCTopAppBarFoundation));
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| 56 | export { MDCFixedTopAppBarFoundation };
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| 57 | // tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.
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| 58 | export default MDCFixedTopAppBarFoundation;
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| 59 | //# sourceMappingURL=foundation.js.map |
| \ | No newline at end of file |