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 { MDCTopAppBarAdapter } from '../adapter';
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24 | import { MDCTopAppBarBaseFoundation } from '../foundation';
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25 | export declare class MDCTopAppBarFoundation extends MDCTopAppBarBaseFoundation {
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26 | /**
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27 | * Indicates if the top app bar was docked in the previous scroll handler iteration.
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28 | */
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29 | private wasDocked;
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30 | /**
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31 | * Indicates if the top app bar is docked in the fully shown position.
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32 | */
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33 | private isDockedShowing;
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34 | /**
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35 | * Variable for current scroll position of the top app bar
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36 | */
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37 | private currentAppBarOffsetTop;
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38 | /**
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39 | * Used to prevent the top app bar from being scrolled out of view during resize events
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40 | */
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41 | private isCurrentlyBeingResized;
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42 | /**
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43 | * The timeout that's used to throttle the resize events
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44 | */
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45 | private resizeThrottleId;
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46 | /**
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47 | * Used for diffs of current scroll position vs previous scroll position
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48 | */
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49 | private lastScrollPosition;
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50 | /**
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51 | * Used to verify when the top app bar is completely showing or completely hidden
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52 | */
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53 | private topAppBarHeight;
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54 | /**
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55 | * The timeout that's used to debounce toggling the isCurrentlyBeingResized
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56 | * variable after a resize
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57 | */
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58 | private resizeDebounceId;
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59 | constructor(adapter?: Partial<MDCTopAppBarAdapter>);
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60 | destroy(): void;
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61 | /**
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62 | * Scroll handler for the default scroll behavior of the top app bar.
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63 | */
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64 | handleTargetScroll(): void;
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65 | /**
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66 | * Top app bar resize handler that throttle/debounce functions that execute updates.
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67 | */
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68 | handleWindowResize(): void;
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69 | /**
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70 | * Function to determine if the DOM needs to update.
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71 | */
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72 | private checkForUpdate;
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73 | /**
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74 | * Function to move the top app bar if needed.
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75 | */
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76 | private moveTopAppBar;
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77 | /**
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78 | * Throttled function that updates the top app bar scrolled values if the
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79 | * top app bar height changes.
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80 | */
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81 | private throttledResizeHandler;
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82 | }
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83 | export default MDCTopAppBarFoundation;
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