242 lines
7.9 KiB
JavaScript
242 lines
7.9 KiB
JavaScript
import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
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import _extends from "@babel/runtime/helpers/esm/extends";
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import { createVNode as _createVNode } from "vue";
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import { defineComponent, shallowRef, reactive, watch, onMounted, getCurrentInstance, computed, onUnmounted, onUpdated } from 'vue';
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import classNames from '../_util/classNames';
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import ResizeObserver from '../vc-resize-observer';
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import throttleByAnimationFrame from '../_util/throttleByAnimationFrame';
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import { withInstall } from '../_util/type';
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import { addObserveTarget, removeObserveTarget, getTargetRect, getFixedTop, getFixedBottom } from './utils';
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import useConfigInject from '../config-provider/hooks/useConfigInject';
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import omit from '../_util/omit';
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import useStyle from './style';
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function getDefaultTarget() {
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return typeof window !== 'undefined' ? window : null;
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}
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var AffixStatus;
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(function (AffixStatus) {
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AffixStatus[AffixStatus["None"] = 0] = "None";
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AffixStatus[AffixStatus["Prepare"] = 1] = "Prepare";
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})(AffixStatus || (AffixStatus = {}));
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// Affix
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export const affixProps = () => ({
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/**
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* 距离窗口顶部达到指定偏移量后触发
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*/
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offsetTop: Number,
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/** 距离窗口底部达到指定偏移量后触发 */
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offsetBottom: Number,
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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: {
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type: Function,
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default: getDefaultTarget
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},
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prefixCls: String,
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/** 固定状态改变时触发的回调函数 */
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onChange: Function,
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onTestUpdatePosition: Function
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});
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const Affix = defineComponent({
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compatConfig: {
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MODE: 3
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},
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name: 'AAffix',
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inheritAttrs: false,
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props: affixProps(),
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setup(props, _ref) {
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let {
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slots,
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emit,
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expose,
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attrs
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} = _ref;
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const placeholderNode = shallowRef();
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const fixedNode = shallowRef();
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const state = reactive({
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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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timeout: null
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});
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const currentInstance = getCurrentInstance();
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const offsetTop = computed(() => {
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return props.offsetBottom === undefined && props.offsetTop === undefined ? 0 : props.offsetTop;
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});
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const offsetBottom = computed(() => props.offsetBottom);
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const measure = () => {
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const {
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status,
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lastAffix
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} = state;
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const {
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target
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} = props;
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if (status !== AffixStatus.Prepare || !fixedNode.value || !placeholderNode.value || !target) {
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return;
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}
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const targetNode = target();
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if (!targetNode) {
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return;
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}
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const newState = {
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status: AffixStatus.None
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};
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const placeholderRect = getTargetRect(placeholderNode.value);
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if (placeholderRect.top === 0 && placeholderRect.left === 0 && placeholderRect.width === 0 && placeholderRect.height === 0) {
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return;
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}
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const targetRect = getTargetRect(targetNode);
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const fixedTop = getFixedTop(placeholderRect, targetRect, offsetTop.value);
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const fixedBottom = getFixedBottom(placeholderRect, targetRect, offsetBottom.value);
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if (placeholderRect.top === 0 && placeholderRect.left === 0 && placeholderRect.width === 0 && placeholderRect.height === 0) {
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return;
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}
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if (fixedTop !== undefined) {
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const width = `${placeholderRect.width}px`;
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const height = `${placeholderRect.height}px`;
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newState.affixStyle = {
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position: 'fixed',
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top: fixedTop,
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width,
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height
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};
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newState.placeholderStyle = {
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width,
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height
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};
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} else if (fixedBottom !== undefined) {
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const width = `${placeholderRect.width}px`;
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const height = `${placeholderRect.height}px`;
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newState.affixStyle = {
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position: 'fixed',
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bottom: fixedBottom,
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width,
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height
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};
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newState.placeholderStyle = {
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width,
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height
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};
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}
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newState.lastAffix = !!newState.affixStyle;
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if (lastAffix !== newState.lastAffix) {
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emit('change', newState.lastAffix);
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}
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// update state
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_extends(state, newState);
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};
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const prepareMeasure = () => {
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_extends(state, {
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status: AffixStatus.Prepare,
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affixStyle: undefined,
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placeholderStyle: undefined
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});
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// Test if `updatePosition` called
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if (process.env.NODE_ENV === 'test') {
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emit('testUpdatePosition');
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}
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};
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const updatePosition = throttleByAnimationFrame(() => {
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prepareMeasure();
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});
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const lazyUpdatePosition = throttleByAnimationFrame(() => {
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const {
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target
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} = props;
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const {
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affixStyle
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} = state;
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// Check position change before measure to make Safari smooth
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if (target && affixStyle) {
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const targetNode = target();
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if (targetNode && placeholderNode.value) {
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const targetRect = getTargetRect(targetNode);
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const placeholderRect = getTargetRect(placeholderNode.value);
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const fixedTop = getFixedTop(placeholderRect, targetRect, offsetTop.value);
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const fixedBottom = getFixedBottom(placeholderRect, targetRect, offsetBottom.value);
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if (fixedTop !== undefined && affixStyle.top === fixedTop || fixedBottom !== undefined && affixStyle.bottom === fixedBottom) {
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return;
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}
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}
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}
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// Directly call prepare measure since it's already throttled.
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prepareMeasure();
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});
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expose({
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updatePosition,
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lazyUpdatePosition
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});
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watch(() => props.target, val => {
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const newTarget = (val === null || val === void 0 ? void 0 : val()) || null;
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if (state.prevTarget !== newTarget) {
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removeObserveTarget(currentInstance);
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if (newTarget) {
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addObserveTarget(newTarget, currentInstance);
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// Mock Event object.
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updatePosition();
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}
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state.prevTarget = newTarget;
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}
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});
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watch(() => [props.offsetTop, props.offsetBottom], updatePosition);
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onMounted(() => {
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const {
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target
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} = props;
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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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state.timeout = setTimeout(() => {
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addObserveTarget(target(), currentInstance);
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// Mock Event object.
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updatePosition();
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});
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}
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});
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onUpdated(() => {
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measure();
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});
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onUnmounted(() => {
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clearTimeout(state.timeout);
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removeObserveTarget(currentInstance);
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updatePosition.cancel();
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// https://github.com/ant-design/ant-design/issues/22683
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lazyUpdatePosition.cancel();
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});
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const {
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prefixCls
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} = useConfigInject('affix', props);
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const [wrapSSR, hashId] = useStyle(prefixCls);
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return () => {
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var _a;
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const {
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affixStyle,
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placeholderStyle,
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status
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} = state;
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const className = classNames({
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[prefixCls.value]: affixStyle,
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[hashId.value]: true
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});
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const restProps = omit(props, ['prefixCls', 'offsetTop', 'offsetBottom', 'target', 'onChange', 'onTestUpdatePosition']);
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return wrapSSR(_createVNode(ResizeObserver, {
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"onResize": updatePosition
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}, {
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default: () => [_createVNode("div", _objectSpread(_objectSpread(_objectSpread({}, restProps), attrs), {}, {
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"ref": placeholderNode,
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"data-measure-status": status
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}), [affixStyle && _createVNode("div", {
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"style": placeholderStyle,
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"aria-hidden": "true"
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}, null), _createVNode("div", {
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"class": className,
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"ref": fixedNode,
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"style": affixStyle
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}, [(_a = slots.default) === null || _a === void 0 ? void 0 : _a.call(slots)])])]
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}));
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};
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}
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});
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export default withInstall(Affix); |