ant-design-vue
Version:
An enterprise-class UI design language and Vue-based implementation
218 lines • 7.95 kB
JavaScript
import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
import _defineProperty from "@babel/runtime/helpers/esm/defineProperty";
import _extends from "@babel/runtime/helpers/esm/extends";
import { createVNode as _createVNode } from "vue";
import { defineComponent, ref, reactive, watch, onMounted, getCurrentInstance, computed, onUnmounted, onUpdated } from 'vue';
import classNames from '../_util/classNames';
import ResizeObserver from '../vc-resize-observer';
import throttleByAnimationFrame from '../_util/throttleByAnimationFrame';
import { withInstall } from '../_util/type';
import { addObserveTarget, removeObserveTarget, getTargetRect, getFixedTop, getFixedBottom } from './utils';
import useConfigInject from '../_util/hooks/useConfigInject';
import omit from '../_util/omit';
function getDefaultTarget() {
return typeof window !== 'undefined' ? window : null;
}
var AffixStatus;
(function (AffixStatus) {
AffixStatus[AffixStatus["None"] = 0] = "None";
AffixStatus[AffixStatus["Prepare"] = 1] = "Prepare";
})(AffixStatus || (AffixStatus = {}));
// Affix
export var affixProps = function affixProps() {
return {
/**
* 距离窗口顶部达到指定偏移量后触发
*/
offsetTop: Number,
/** 距离窗口底部达到指定偏移量后触发 */
offsetBottom: Number,
/** 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 */
target: {
type: Function,
default: getDefaultTarget
},
prefixCls: String,
/** 固定状态改变时触发的回调函数 */
onChange: Function,
onTestUpdatePosition: Function
};
};
var Affix = defineComponent({
compatConfig: {
MODE: 3
},
name: 'AAffix',
props: affixProps(),
setup: function setup(props, _ref) {
var slots = _ref.slots,
emit = _ref.emit,
expose = _ref.expose;
var placeholderNode = ref();
var fixedNode = ref();
var state = reactive({
affixStyle: undefined,
placeholderStyle: undefined,
status: AffixStatus.None,
lastAffix: false,
prevTarget: null,
timeout: null
});
var currentInstance = getCurrentInstance();
var offsetTop = computed(function () {
return props.offsetBottom === undefined && props.offsetTop === undefined ? 0 : props.offsetTop;
});
var offsetBottom = computed(function () {
return props.offsetBottom;
});
var measure = function measure() {
var status = state.status,
lastAffix = state.lastAffix;
var target = props.target;
if (status !== AffixStatus.Prepare || !fixedNode.value || !placeholderNode.value || !target) {
return;
}
var targetNode = target();
if (!targetNode) {
return;
}
var newState = {
status: AffixStatus.None
};
var targetRect = getTargetRect(targetNode);
var placeholderRect = getTargetRect(placeholderNode.value);
var fixedTop = getFixedTop(placeholderRect, targetRect, offsetTop.value);
var fixedBottom = getFixedBottom(placeholderRect, targetRect, offsetBottom.value);
if (fixedTop !== undefined) {
newState.affixStyle = {
position: 'fixed',
top: fixedTop,
width: placeholderRect.width + 'px',
height: placeholderRect.height + 'px'
};
newState.placeholderStyle = {
width: placeholderRect.width + 'px',
height: placeholderRect.height + 'px'
};
} else if (fixedBottom !== undefined) {
newState.affixStyle = {
position: 'fixed',
bottom: fixedBottom,
width: placeholderRect.width + 'px',
height: placeholderRect.height + 'px'
};
newState.placeholderStyle = {
width: placeholderRect.width + 'px',
height: placeholderRect.height + 'px'
};
}
newState.lastAffix = !!newState.affixStyle;
if (lastAffix !== newState.lastAffix) {
emit('change', newState.lastAffix);
}
// update state
_extends(state, newState);
};
var prepareMeasure = function prepareMeasure() {
_extends(state, {
status: AffixStatus.Prepare,
affixStyle: undefined,
placeholderStyle: undefined
});
currentInstance.update();
// Test if `updatePosition` called
if (process.env.NODE_ENV === 'test') {
emit('testUpdatePosition');
}
};
var updatePosition = throttleByAnimationFrame(function () {
prepareMeasure();
});
var lazyUpdatePosition = throttleByAnimationFrame(function () {
var target = props.target;
var affixStyle = state.affixStyle;
// Check position change before measure to make Safari smooth
if (target && affixStyle) {
var targetNode = target();
if (targetNode && placeholderNode.value) {
var targetRect = getTargetRect(targetNode);
var placeholderRect = getTargetRect(placeholderNode.value);
var fixedTop = getFixedTop(placeholderRect, targetRect, offsetTop.value);
var fixedBottom = getFixedBottom(placeholderRect, targetRect, offsetBottom.value);
if (fixedTop !== undefined && affixStyle.top === fixedTop || fixedBottom !== undefined && affixStyle.bottom === fixedBottom) {
return;
}
}
}
// Directly call prepare measure since it's already throttled.
prepareMeasure();
});
expose({
updatePosition: updatePosition,
lazyUpdatePosition: lazyUpdatePosition
});
watch(function () {
return props.target;
}, function (val) {
var newTarget = (val === null || val === void 0 ? void 0 : val()) || null;
if (state.prevTarget !== newTarget) {
removeObserveTarget(currentInstance);
if (newTarget) {
addObserveTarget(newTarget, currentInstance);
// Mock Event object.
updatePosition();
}
state.prevTarget = newTarget;
}
});
watch(function () {
return [props.offsetTop, props.offsetBottom];
}, updatePosition);
onMounted(function () {
var target = props.target;
if (target) {
// [Legacy] Wait for parent component ref has its value.
// We should use target as directly element instead of function which makes element check hard.
state.timeout = setTimeout(function () {
addObserveTarget(target(), currentInstance);
// Mock Event object.
updatePosition();
});
}
});
onUpdated(function () {
measure();
});
onUnmounted(function () {
clearTimeout(state.timeout);
removeObserveTarget(currentInstance);
updatePosition.cancel();
// https://github.com/ant-design/ant-design/issues/22683
lazyUpdatePosition.cancel();
});
var _useConfigInject = useConfigInject('affix', props),
prefixCls = _useConfigInject.prefixCls;
return function () {
var _slots$default;
var affixStyle = state.affixStyle,
placeholderStyle = state.placeholderStyle;
var className = classNames(_defineProperty({}, prefixCls.value, affixStyle));
var restProps = omit(props, ['prefixCls', 'offsetTop', 'offsetBottom', 'target', 'onChange', 'onTestUpdatePosition']);
return _createVNode(ResizeObserver, {
"onResize": updatePosition
}, {
default: function _default() {
return [_createVNode("div", _objectSpread(_objectSpread({}, restProps), {}, {
"style": placeholderStyle,
"ref": placeholderNode
}), [_createVNode("div", {
"class": className,
"ref": fixedNode,
"style": affixStyle
}, [(_slots$default = slots.default) === null || _slots$default === void 0 ? void 0 : _slots$default.call(slots)])])];
}
});
};
}
});
export default withInstall(Affix);