1 | "use strict";
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2 |
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3 | var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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4 |
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5 | Object.defineProperty(exports, "__esModule", {
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6 | value: true
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7 | });
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8 | exports.getTargetRect = getTargetRect;
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9 | exports.getFixedTop = getFixedTop;
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10 | exports.getFixedBottom = getFixedBottom;
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11 | exports.getObserverEntities = getObserverEntities;
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12 | exports.addObserveTarget = addObserveTarget;
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13 | exports.removeObserveTarget = removeObserveTarget;
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14 |
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15 | var _addEventListener = _interopRequireDefault(require("rc-util/lib/Dom/addEventListener"));
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16 |
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17 | function getTargetRect(target) {
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18 | return target !== window ? target.getBoundingClientRect() : {
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19 | top: 0,
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20 | bottom: window.innerHeight
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21 | };
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22 | }
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23 |
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24 | function getFixedTop(placeholderReact, targetRect, offsetTop) {
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25 | if (offsetTop !== undefined && targetRect.top > placeholderReact.top - offsetTop) {
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26 | return offsetTop + targetRect.top;
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27 | }
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28 |
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29 | return undefined;
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30 | }
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31 |
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32 | function getFixedBottom(placeholderReact, targetRect, offsetBottom) {
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33 | if (offsetBottom !== undefined && targetRect.bottom < placeholderReact.bottom + offsetBottom) {
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34 | var targetBottomOffset = window.innerHeight - targetRect.bottom;
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35 | return offsetBottom + targetBottomOffset;
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36 | }
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37 |
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38 | return undefined;
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39 | }
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40 |
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41 |
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42 | var TRIGGER_EVENTS = ['resize', 'scroll', 'touchstart', 'touchmove', 'touchend', 'pageshow', 'load'];
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43 | var observerEntities = [];
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44 |
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45 | function getObserverEntities() {
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46 |
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47 | return observerEntities;
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48 | }
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49 |
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50 | function addObserveTarget(target, affix) {
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51 | if (!target) return;
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52 | var entity = observerEntities.find(function (item) {
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53 | return item.target === target;
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54 | });
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55 |
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56 | if (entity) {
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57 | entity.affixList.push(affix);
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58 | } else {
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59 | entity = {
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60 | target: target,
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61 | affixList: [affix],
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62 | eventHandlers: {}
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63 | };
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64 | observerEntities.push(entity);
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65 |
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66 | TRIGGER_EVENTS.forEach(function (eventName) {
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67 | entity.eventHandlers[eventName] = (0, _addEventListener["default"])(target, eventName, function () {
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68 | entity.affixList.forEach(function (targetAffix) {
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69 | targetAffix.lazyUpdatePosition();
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70 | });
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71 | });
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72 | });
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73 | }
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74 | }
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75 |
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76 | function removeObserveTarget(affix) {
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77 | var observerEntity = observerEntities.find(function (oriObserverEntity) {
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78 | var hasAffix = oriObserverEntity.affixList.some(function (item) {
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79 | return item === affix;
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80 | });
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81 |
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82 | if (hasAffix) {
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83 | oriObserverEntity.affixList = oriObserverEntity.affixList.filter(function (item) {
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84 | return item !== affix;
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85 | });
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86 | }
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87 |
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88 | return hasAffix;
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89 | });
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90 |
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91 | if (observerEntity && observerEntity.affixList.length === 0) {
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92 | observerEntities = observerEntities.filter(function (item) {
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93 | return item !== observerEntity;
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94 | });
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95 |
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96 | TRIGGER_EVENTS.forEach(function (eventName) {
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97 | var handler = observerEntity.eventHandlers[eventName];
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98 |
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99 | if (handler && handler.remove) {
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100 | handler.remove();
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101 | }
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102 | });
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103 | }
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104 | } |
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