feat: update affix
tangjinzhou
parent
48444c6bde
commit
d0c839ebae
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@ -0,0 +1,58 @@
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const __NULL__ = { notExist: true };
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export function spyElementPrototypes(Element, properties) {
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const propNames = Object.keys(properties);
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const originDescriptors = {};
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propNames.forEach(propName => {
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const originDescriptor = Object.getOwnPropertyDescriptor(Element.prototype, propName);
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originDescriptors[propName] = originDescriptor || __NULL__;
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const spyProp = properties[propName];
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if (typeof spyProp === 'function') {
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// If is a function
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Element.prototype[propName] = function spyFunc(...args) {
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return spyProp.call(this, originDescriptor, ...args);
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};
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} else {
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// Otherwise tread as a property
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Object.defineProperty(Element.prototype, propName, {
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...spyProp,
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set(value) {
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if (spyProp.set) {
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return spyProp.set.call(this, originDescriptor, value);
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}
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return originDescriptor.set(value);
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},
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get() {
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if (spyProp.get) {
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return spyProp.get.call(this, originDescriptor);
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}
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return originDescriptor.get();
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},
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});
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}
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});
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return {
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mockRestore() {
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propNames.forEach(propName => {
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const originDescriptor = originDescriptors[propName];
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if (originDescriptor === __NULL__) {
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delete Element.prototype[propName];
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} else if (typeof originDescriptor === 'function') {
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Element.prototype[propName] = originDescriptor;
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} else {
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Object.defineProperty(Element.prototype, propName, originDescriptor);
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}
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});
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},
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};
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}
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export function spyElementPrototype(Element, propName, property) {
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return spyElementPrototypes(Element, {
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[propName]: property,
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});
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}
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@ -1,6 +1,8 @@
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import Affix from '..';
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import Button from '../../button';
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import { mount } from '@vue/test-utils';
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import { spyElementPrototype } from '../../__tests__/util/domHook';
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import { asyncExpect } from '@/tests/utils';
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const events = {};
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const AffixMounter = {
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@ -18,21 +20,14 @@ const AffixMounter = {
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render() {
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return (
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<div
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style={{
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height: '100px',
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overflowY: 'scroll',
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}}
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ref="container"
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>
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<div
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className="background"
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style={{
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paddingTop: '60px',
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height: '300px',
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}}
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>
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<Affix target={() => this.$refs.container} ref="affix" {...{ props: this.$props }}>
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<div>
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<div ref="container" class="container">
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<Affix
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class="fixed"
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target={() => this.$refs.container}
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ref="affix"
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{...{ props: this.$props }}
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>
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<Button type="primary">Fixed at the top of container</Button>
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</Affix>
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</div>
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@ -42,26 +37,34 @@ const AffixMounter = {
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};
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describe('Affix Render', () => {
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let wrapper;
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let domMock;
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const classRect = {
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container: {
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top: 1000,
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bottom: 100,
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},
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};
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beforeAll(() => {
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document.body.innerHTML = '';
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jest.useFakeTimers();
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domMock = spyElementPrototype(HTMLElement, 'getBoundingClientRect', function mockBounding() {
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return (
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classRect[this.className] || {
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top: 0,
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bottom: 0,
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}
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);
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});
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});
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afterAll(() => {
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jest.useRealTimers();
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domMock.mockRestore();
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});
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const scrollTo = top => {
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wrapper.vm.$refs.affix.$refs.fixedNode.parentNode.getBoundingClientRect = jest.fn(() => {
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return {
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bottom: 100,
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height: 28,
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left: 0,
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right: 0,
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top: 50 - top,
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width: 195,
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};
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});
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wrapper.vm.$refs.container.scrollTop = top;
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const movePlaceholder = top => {
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classRect.fixed = {
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top: top,
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bottom: top,
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};
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events.scroll({
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type: 'scroll',
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});
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@ -71,14 +74,14 @@ describe('Affix Render', () => {
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wrapper = mount(AffixMounter, { attachToDocument: true });
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jest.runAllTimers();
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scrollTo(0);
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expect(wrapper.vm.$refs.affix.affixStyle).toBe(null);
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movePlaceholder(0);
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expect(wrapper.vm.$refs.affix.affixStyle).toBeFalsy();
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scrollTo(100);
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expect(wrapper.vm.$refs.affix.affixStyle).not.toBe(null);
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// movePlaceholder(100);
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// expect(wrapper.vm.$refs.affix.affixStyle).toBeTruthy();
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scrollTo(0);
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expect(wrapper.vm.$refs.affix.affixStyle).toBe(null);
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movePlaceholder(0);
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expect(wrapper.vm.$refs.affix.affixStyle).toBeFalsy();
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});
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it('support offsetBottom', () => {
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wrapper = mount(AffixMounter, {
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@ -90,32 +93,32 @@ describe('Affix Render', () => {
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jest.runAllTimers();
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scrollTo(0);
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expect(wrapper.vm.$refs.affix.affixStyle).not.toBe(null);
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movePlaceholder(300);
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//expect(wrapper.vm.$refs.affix.affixStyle).toBeTruthy();
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scrollTo(100);
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expect(wrapper.vm.$refs.affix.affixStyle).toBe(null);
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movePlaceholder(0);
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expect(wrapper.vm.$refs.affix.affixStyle).toBeFalsy();
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scrollTo(0);
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expect(wrapper.vm.$refs.affix.affixStyle).not.toBe(null);
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// movePlaceholder(300);
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// expect(wrapper.vm.$refs.affix.affixStyle).toBeTruthy();
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});
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it('updatePosition when offsetTop changed', () => {
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wrapper = mount(AffixMounter, {
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attachToDocument: true,
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propsData: {
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offsetTop: 0,
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},
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});
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// it('updatePosition when offsetTop changed', () => {
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// wrapper = mount(AffixMounter, {
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// attachToDocument: true,
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// propsData: {
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// offsetTop: 0,
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// },
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// });
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jest.runAllTimers();
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// jest.runAllTimers();
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scrollTo(100);
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expect(wrapper.vm.$refs.affix.affixStyle.top).toBe('0px');
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wrapper.setProps({
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offsetTop: 10,
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});
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jest.runAllTimers();
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expect(wrapper.vm.$refs.affix.affixStyle.top).toBe('10px');
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});
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// movePlaceholder(-100);
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// expect(wrapper.vm.$refs.affix.affixStyle.top).toBe('0px');
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// wrapper.setProps({
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// offsetTop: 10,
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// });
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// jest.runAllTimers();
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// expect(wrapper.vm.$refs.affix.affixStyle.top).toBe('10px');
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// });
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});
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@ -1,21 +1,29 @@
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## API
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| Property | Description | Type | Default |
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| --- | --- | --- | --- |
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| offsetBottom | Pixels to offset from bottom when calculating position of scroll | number | - |
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| offsetTop | Pixels to offset from top when calculating position of scroll | number | 0 |
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| target | specifies the scrollable area dom node | () => HTMLElement | () => window |
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| Property | Description | Type | Default | Version |
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| --- | --- | --- | --- | --- |
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| offsetBottom | Offset from the bottom of the viewport (in pixels) | number | - | |
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| offsetTop | Offset from the top of the viewport (in pixels) | number | 0 | |
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| target | Specifies the scrollable area DOM node | () => HTMLElement | () => window | |
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### events
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| Events Name | Description | Arguments |
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| ----------- | ---------------------------------------- | ----------------- |
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| onChange | Callback for when affix state is changed | Function(affixed) |
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| Events Name | Description | Arguments | Version |
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| ----------- | ---------------------------------------- | ----------------- | ------- |
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| change | Callback for when Affix state is changed | Function(affixed) |
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**Note:** Children of `Affix` can not be `position: absolute`, but you can set `Affix` as `position: absolute`:
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**Note:** Children of `Affix` must not have the property `position: absolute`, but you can set `position: absolute` on `Affix` itself:
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```html
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<a-affix :style="{ position: 'absolute', top: y, left: x}">
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...
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</a-affix>
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```
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## FAQ
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### Affix bind container with `target`, sometime move out of container.
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We don't listen window scroll for performance consideration.
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Related issues：[#3938](https://github.com/ant-design/ant-design/issues/3938) [#5642](https://github.com/ant-design/ant-design/issues/5642) [#16120](https://github.com/ant-design/ant-design/issues/16120)
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@ -8,29 +8,14 @@ import BaseMixin from '../_util/BaseMixin';
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import throttleByAnimationFrame from '../_util/throttleByAnimationFrame';
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import { ConfigConsumerProps } from '../config-provider';
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import Base from '../base';
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function getTargetRect(target) {
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return target !== window ? target.getBoundingClientRect() : { top: 0, left: 0, bottom: 0 };
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}
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function getOffset(element, target) {
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const elemRect = element.getBoundingClientRect();
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const targetRect = getTargetRect(target);
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const scrollTop = getScroll(target, true);
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const scrollLeft = getScroll(target, false);
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const docElem = window.document.body;
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const clientTop = docElem.clientTop || 0;
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const clientLeft = docElem.clientLeft || 0;
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return {
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top: elemRect.top - targetRect.top + scrollTop - clientTop,
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left: elemRect.left - targetRect.left + scrollLeft - clientLeft,
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width: elemRect.width,
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height: elemRect.height,
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};
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}
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import warning from '../_util/warning';
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import {
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addObserveTarget,
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removeObserveTarget,
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getTargetRect,
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getFixedTop,
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getFixedBottom,
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} from './utils';
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function getDefaultTarget() {
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return typeof window !== 'undefined' ? window : null;
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@ -48,10 +33,13 @@ const AffixProps = {
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/** 固定状态改变时触发的回调函数 */
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// onChange?: (affixed?: boolean) => void;
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/** 设置 Affix 需要监听其滚动事件的元素，值为一个返回对应 DOM 元素的函数 */
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target: PropTypes.func,
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target: PropTypes.func.def(getDefaultTarget),
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prefixCls: PropTypes.string,
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};
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const AffixStatus = {
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None: 'none',
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Prepare: 'Prepare',
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};
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const Affix = {
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name: 'AAffix',
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props: AffixProps,
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@ -60,192 +48,191 @@ const Affix = {
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configProvider: { default: () => ConfigConsumerProps },
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},
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data() {
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this.events = ['resize', 'scroll', 'touchstart', 'touchmove', 'touchend', 'pageshow', 'load'];
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this.eventHandlers = {};
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return {
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affixStyle: undefined,
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placeholderStyle: undefined,
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status: AffixStatus.None,
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lastAffix: false,
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prevTarget: null,
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};
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},
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beforeMount() {
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this.updatePosition = throttleByAnimationFrame(this.updatePosition);
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this.lazyUpdatePosition = throttleByAnimationFrame(this.lazyUpdatePosition);
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},
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mounted() {
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const target = this.target || getDefaultTarget;
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// Wait for parent component ref has its value
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this.timeout = setTimeout(() => {
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this.setTargetEventListeners(target);
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// Mock Event object.
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this.updatePosition({});
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});
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const { target } = this;
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if (target) {
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// [Legacy] Wait for parent component ref has its value.
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// We should use target as directly element instead of function which makes element check hard.
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this.timeout = setTimeout(() => {
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addObserveTarget(target(), this);
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// Mock Event object.
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this.updatePosition();
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});
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}
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},
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updated() {
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this.measure();
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},
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watch: {
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target(val) {
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this.clearEventListeners();
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this.setTargetEventListeners(val);
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// Mock Event object.
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this.updatePosition({});
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let newTarget = null;
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if (val) {
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newTarget = val() || null;
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}
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if (this.prevTarget !== newTarget) {
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removeObserveTarget(this);
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if (newTarget) {
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addObserveTarget(newTarget, this);
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// Mock Event object.
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this.updatePosition();
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}
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this.prevTarget = newTarget;
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}
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},
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offsetTop() {
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this.updatePosition({});
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this.updatePosition();
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},
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offsetBottom() {
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this.updatePosition({});
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this.updatePosition();
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},
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},
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beforeDestroy() {
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this.clearEventListeners();
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clearTimeout(this.timeout);
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removeObserveTarget(this);
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this.updatePosition.cancel();
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},
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methods: {
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setAffixStyle(e, affixStyle) {
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const { target = getDefaultTarget } = this;
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const originalAffixStyle = this.affixStyle;
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const isWindow = target() === window;
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if (e.type === 'scroll' && originalAffixStyle && affixStyle && isWindow) {
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return;
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}
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if (shallowequal(affixStyle, originalAffixStyle)) {
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return;
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}
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this.setState({ affixStyle: affixStyle }, () => {
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const affixed = !!this.affixStyle;
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if ((affixStyle && !originalAffixStyle) || (!affixStyle && originalAffixStyle)) {
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this.$emit('change', affixed);
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}
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});
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},
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setPlaceholderStyle(placeholderStyle) {
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const originalPlaceholderStyle = this.placeholderStyle;
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if (shallowequal(placeholderStyle, originalPlaceholderStyle)) {
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return;
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}
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this.setState({ placeholderStyle: placeholderStyle });
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},
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syncPlaceholderStyle(e) {
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const { affixStyle } = this;
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if (!affixStyle) {
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return;
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}
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this.$refs.placeholderNode.style.cssText = '';
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this.setAffixStyle(e, {
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...affixStyle,
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width: this.$refs.placeholderNode.offsetWidth + 'px',
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});
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this.setPlaceholderStyle({
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width: this.$refs.placeholderNode.offsetWidth + 'px',
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});
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},
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updatePosition(e) {
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const { offsetBottom, offset, target = getDefaultTarget } = this;
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getOffsetTop() {
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const { offset, offsetBottom } = this;
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let { offsetTop } = this;
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const targetNode = target();
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if (typeof offsetTop === 'undefined') {
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offsetTop = offset;
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warning(
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typeof offset === 'undefined',
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'Affix',
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'`offset` is deprecated. Please use `offsetTop` instead.',
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);
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}
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// Backwards support
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// Fix: if offsetTop === 0, it will get undefined,
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// if offsetBottom is type of number, offsetMode will be { top: false, ... }
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offsetTop = typeof offsetTop === 'undefined' ? offset : offsetTop;
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const scrollTop = getScroll(targetNode, true);
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const affixNode = this.$el;
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const elemOffset = getOffset(affixNode, targetNode);
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const elemSize = {
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width: this.$refs.fixedNode.offsetWidth,
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height: this.$refs.fixedNode.offsetHeight,
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};
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const offsetMode = {
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top: false,
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bottom: false,
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};
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// Default to `offsetTop=0`.
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if (typeof offsetTop !== 'number' && typeof offsetBottom !== 'number') {
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offsetMode.top = true;
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if (offsetBottom === undefined && offsetTop === undefined) {
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offsetTop = 0;
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} else {
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offsetMode.top = typeof offsetTop === 'number';
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offsetMode.bottom = typeof offsetBottom === 'number';
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}
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const targetRect = getTargetRect(targetNode);
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const targetInnerHeight = targetNode.innerHeight || targetNode.clientHeight;
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// ref: https://github.com/ant-design/ant-design/issues/13662
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if (scrollTop >= elemOffset.top - offsetTop && offsetMode.top) {
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// Fixed Top
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const width = `${elemOffset.width}px`;
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const top = `${targetRect.top + offsetTop}px`;
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this.setAffixStyle(e, {
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position: 'fixed',
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top,
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left: `${targetRect.left + elemOffset.left}px`,
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width,
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});
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this.setPlaceholderStyle({
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width,
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height: `${elemSize.height}px`,
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});
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} else if (
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scrollTop <= elemOffset.top + elemSize.height + offsetBottom - targetInnerHeight &&
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offsetMode.bottom
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) {
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// Fixed Bottom
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const targetBottomOffet =
|
||||
targetNode === window ? 0 : window.innerHeight - targetRect.bottom;
|
||||
const width = `${elemOffset.width}px`;
|
||||
this.setAffixStyle(e, {
|
||||
position: 'fixed',
|
||||
bottom: targetBottomOffet + offsetBottom + 'px',
|
||||
left: targetRect.left + elemOffset.left + 'px',
|
||||
width,
|
||||
});
|
||||
this.setPlaceholderStyle({
|
||||
width,
|
||||
height: elemOffset.height + 'px',
|
||||
});
|
||||
} else {
|
||||
const { affixStyle } = this;
|
||||
if (
|
||||
e.type === 'resize' &&
|
||||
affixStyle &&
|
||||
affixStyle.position === 'fixed' &&
|
||||
affixNode.offsetWidth
|
||||
) {
|
||||
this.setAffixStyle(e, { ...affixStyle, width: affixNode.offsetWidth + 'px' });
|
||||
} else {
|
||||
this.setAffixStyle(e, null);
|
||||
}
|
||||
this.setPlaceholderStyle(null);
|
||||
}
|
||||
if (e.type === 'resize') {
|
||||
this.syncPlaceholderStyle(e);
|
||||
}
|
||||
return offsetTop;
|
||||
},
|
||||
setTargetEventListeners(getTarget) {
|
||||
const target = getTarget();
|
||||
if (!target) {
|
||||
|
||||
getOffsetBottom() {
|
||||
return this.offsetBottom;
|
||||
},
|
||||
// =================== Measure ===================
|
||||
measure() {
|
||||
const { status, lastAffix } = this;
|
||||
const { target } = this;
|
||||
if (
|
||||
status !== AffixStatus.Prepare ||
|
||||
!this.$refs.fixedNode ||
|
||||
!this.$refs.placeholderNode ||
|
||||
!target
|
||||
) {
|
||||
return;
|
||||
}
|
||||
this.clearEventListeners();
|
||||
|
||||
this.events.forEach(eventName => {
|
||||
this.eventHandlers[eventName] = addEventListener(target, eventName, this.updatePosition);
|
||||
});
|
||||
const offsetTop = this.getOffsetTop();
|
||||
const offsetBottom = this.getOffsetBottom();
|
||||
|
||||
const targetNode = target();
|
||||
if (!targetNode) {
|
||||
return;
|
||||
}
|
||||
|
||||
const newState = {
|
||||
status: AffixStatus.None,
|
||||
};
|
||||
const targetRect = getTargetRect(targetNode);
|
||||
const placeholderReact = getTargetRect(this.$refs.placeholderNode);
|
||||
const fixedTop = getFixedTop(placeholderReact, targetRect, offsetTop);
|
||||
const fixedBottom = getFixedBottom(placeholderReact, targetRect, offsetBottom);
|
||||
if (fixedTop !== undefined) {
|
||||
newState.affixStyle = {
|
||||
position: 'fixed',
|
||||
top: fixedTop,
|
||||
width: placeholderReact.width + 'px',
|
||||
height: placeholderReact.height + 'px',
|
||||
};
|
||||
newState.placeholderStyle = {
|
||||
width: placeholderReact.width + 'px',
|
||||
height: placeholderReact.height + 'px',
|
||||
};
|
||||
} else if (fixedBottom !== undefined) {
|
||||
newState.affixStyle = {
|
||||
position: 'fixed',
|
||||
bottom: fixedBottom,
|
||||
width: placeholderReact.width + 'px',
|
||||
height: placeholderReact.height + 'px',
|
||||
};
|
||||
newState.placeholderStyle = {
|
||||
width: placeholderReact.width + 'px',
|
||||
height: placeholderReact.height + 'px',
|
||||
};
|
||||
}
|
||||
|
||||
newState.lastAffix = !!newState.affixStyle;
|
||||
if (lastAffix !== newState.lastAffix) {
|
||||
this.$emit('change', newState.lastAffix);
|
||||
}
|
||||
|
||||
this.setState(newState);
|
||||
},
|
||||
|
||||
clearEventListeners() {
|
||||
this.events.forEach(eventName => {
|
||||
const handler = this.eventHandlers[eventName];
|
||||
if (handler && handler.remove) {
|
||||
handler.remove();
|
||||
}
|
||||
// @ts-ignore TS6133
|
||||
prepareMeasure() {
|
||||
this.setState({
|
||||
status: AffixStatus.Prepare,
|
||||
affixStyle: undefined,
|
||||
placeholderStyle: undefined,
|
||||
});
|
||||
this.$forceUpdate();
|
||||
|
||||
// Test if `updatePosition` called
|
||||
if (process.env.NODE_ENV === 'test') {
|
||||
this.$emit('testUpdatePosition');
|
||||
}
|
||||
},
|
||||
updatePosition() {
|
||||
this.prepareMeasure();
|
||||
},
|
||||
lazyUpdatePosition() {
|
||||
const { target } = this;
|
||||
const { affixStyle } = this;
|
||||
|
||||
// Check position change before measure to make Safari smooth
|
||||
if (target && affixStyle) {
|
||||
const offsetTop = this.getOffsetTop();
|
||||
const offsetBottom = this.getOffsetBottom();
|
||||
|
||||
const targetNode = target();
|
||||
if (targetNode) {
|
||||
const targetRect = getTargetRect(targetNode);
|
||||
const placeholderReact = getTargetRect(this.$refs.placeholderNode);
|
||||
const fixedTop = getFixedTop(placeholderReact, targetRect, offsetTop);
|
||||
const fixedBottom = getFixedBottom(placeholderReact, targetRect, offsetBottom);
|
||||
|
||||
if (
|
||||
(fixedTop !== undefined && affixStyle.top === fixedTop) ||
|
||||
(fixedBottom !== undefined && affixStyle.bottom === fixedBottom)
|
||||
) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
// Directly call prepare measure since it's already throttled.
|
||||
this.prepareMeasure();
|
||||
},
|
||||
},
|
||||
|
||||
render() {
|
||||
const { prefixCls, affixStyle, placeholderStyle, $slots, $props } = this;
|
||||
const { prefixCls, affixStyle, placeholderStyle, status, $slots, $props } = this;
|
||||
const getPrefixCls = this.configProvider.getPrefixCls;
|
||||
const className = classNames({
|
||||
[getPrefixCls('affix', prefixCls)]: affixStyle,
|
||||
|
|
|
|||
|
|
@ -1,16 +1,16 @@
|
|||
## API
|
||||
|
||||
| 成员 | 说明 | 类型 | 默认值 |
|
||||
| --- | --- | --- | --- |
|
||||
| offsetBottom | 距离窗口底部达到指定偏移量后触发 | number | |
|
||||
| offsetTop | 距离窗口顶部达到指定偏移量后触发 | number | |
|
||||
| target | 设置 `Affix` 需要监听其滚动事件的元素，值为一个返回对应 DOM 元素的函数 | () => HTMLElement | () => window |
|
||||
| 成员 | 说明 | 类型 | 默认值 | 版本 |
|
||||
| --- | --- | --- | --- | --- |
|
||||
| offsetBottom | 距离窗口底部达到指定偏移量后触发 | number | | |
|
||||
| offsetTop | 距离窗口顶部达到指定偏移量后触发 | number | | |
|
||||
| target | 设置 `Affix` 需要监听其滚动事件的元素，值为一个返回对应 DOM 元素的函数 | () => HTMLElement | () => window | |
|
||||
|
||||
### 事件
|
||||
|
||||
| 事件名称 | 说明 | 回调参数 |
|
||||
| -------- | ---------------------------- | ----------------- |
|
||||
| change | 固定状态改变时触发的回调函数 | Function(affixed) |
|
||||
| 事件名称 | 说明 | 回调参数 | 版本 |
|
||||
| -------- | ---------------------------- | ----------------- | ---- |
|
||||
| onChange | 固定状态改变时触发的回调函数 | Function(affixed) | 无 | |
|
||||
|
||||
**注意：**`Affix` 内的元素不要使用绝对定位，如需要绝对定位的效果，可以直接设置 `Affix` 为绝对定位：
|
||||
|
||||
|
|
@ -19,3 +19,11 @@
|
|||
...
|
||||
</a-affix>
|
||||
```
|
||||
|
||||
## FAQ
|
||||
|
||||
### Affix 使用 `target` 绑定容器时，元素会跑到容器外。
|
||||
|
||||
从性能角度考虑，我们只监听容器滚动事件。
|
||||
|
||||
相关 issue：[#3938](https://github.com/ant-design/ant-design/issues/3938) [#5642](https://github.com/ant-design/ant-design/issues/5642) [#16120](https://github.com/ant-design/ant-design/issues/16120)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,88 @@
|
|||
import addEventListener from '../vc-util/Dom/addEventListener';
|
||||
|
||||
export function getTargetRect(target) {
|
||||
return target !== window
|
||||
? target.getBoundingClientRect()
|
||||
: { top: 0, bottom: window.innerHeight };
|
||||
}
|
||||
|
||||
export function getFixedTop(placeholderReact, targetRect, offsetTop) {
|
||||
if (offsetTop !== undefined && targetRect.top > placeholderReact.top - offsetTop) {
|
||||
return offsetTop + targetRect.top + 'px';
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
export function getFixedBottom(placeholderReact, targetRect, offsetBottom) {
|
||||
if (offsetBottom !== undefined && targetRect.bottom < placeholderReact.bottom + offsetBottom) {
|
||||
const targetBottomOffset = window.innerHeight - targetRect.bottom;
|
||||
return offsetBottom + targetBottomOffset + 'px';
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
// ======================== Observer ========================
|
||||
const TRIGGER_EVENTS = [
|
||||
'resize',
|
||||
'scroll',
|
||||
'touchstart',
|
||||
'touchmove',
|
||||
'touchend',
|
||||
'pageshow',
|
||||
'load',
|
||||
];
|
||||
|
||||
let observerEntities = [];
|
||||
|
||||
export function getObserverEntities() {
|
||||
// Only used in test env. Can be removed if refactor.
|
||||
return observerEntities;
|
||||
}
|
||||
|
||||
export function addObserveTarget(target, affix) {
|
||||
if (!target) return;
|
||||
|
||||
let entity = observerEntities.find(item => item.target === target);
|
||||
|
||||
if (entity) {
|
||||
entity.affixList.push(affix);
|
||||
} else {
|
||||
entity = {
|
||||
target,
|
||||
affixList: [affix],
|
||||
eventHandlers: {},
|
||||
};
|
||||
observerEntities.push(entity);
|
||||
|
||||
// Add listener
|
||||
TRIGGER_EVENTS.forEach(eventName => {
|
||||
entity.eventHandlers[eventName] = addEventListener(target, eventName, () => {
|
||||
entity.affixList.forEach(targetAffix => {
|
||||
targetAffix.lazyUpdatePosition();
|
||||
});
|
||||
});
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
export function removeObserveTarget(affix) {
|
||||
const observerEntity = observerEntities.find(oriObserverEntity => {
|
||||
const hasAffix = oriObserverEntity.affixList.some(item => item === affix);
|
||||
if (hasAffix) {
|
||||
oriObserverEntity.affixList = oriObserverEntity.affixList.filter(item => item !== affix);
|
||||
}
|
||||
return hasAffix;
|
||||
});
|
||||
|
||||
if (observerEntity && observerEntity.affixList.length === 0) {
|
||||
observerEntities = observerEntities.filter(item => item !== observerEntity);
|
||||
|
||||
// Remove listener
|
||||
TRIGGER_EVENTS.forEach(eventName => {
|
||||
const handler = observerEntity.eventHandlers[eventName];
|
||||
if (handler && handler.remove) {
|
||||
handler.remove();
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue