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{"version":3,"file":"affix2.mjs","sources":["../../../../../../packages/components/affix/src/affix.vue"],"sourcesContent":["<template>\n <div ref=\"root\" :class=\"ns.b()\" :style=\"rootStyle\">\n <div :class=\"{ [ns.m('fixed')]: fixed }\" :style=\"affixStyle\">\n <slot />\n </div>\n </div>\n</template>\n\n<script lang=\"ts\" setup>\nimport {\n computed,\n nextTick,\n onMounted,\n ref,\n shallowRef,\n watch,\n watchEffect,\n} from 'vue'\nimport {\n useElementBounding,\n useEventListener,\n useWindowSize,\n} from '@vueuse/core'\nimport { addUnit, getScrollContainer, throwError } from '@element-plus/utils'\nimport { useNamespace } from '@element-plus/hooks'\nimport { CHANGE_EVENT } from '@element-plus/constants'\nimport { affixEmits, affixProps } from './affix'\n\nimport type { CSSProperties } from 'vue'\n\nconst COMPONENT_NAME = 'ElAffix'\ndefineOptions({\n name: COMPONENT_NAME,\n})\nconst props = defineProps(affixProps)\nconst emit = defineEmits(affixEmits)\n\nconst ns = useNamespace('affix')\n\nconst target = shallowRef<HTMLElement>()\nconst root = shallowRef<HTMLDivElement>()\nconst scrollContainer = shallowRef<HTMLElement | Window>()\nconst { height: windowHeight } = useWindowSize()\nconst {\n height: rootHeight,\n width: rootWidth,\n top: rootTop,\n bottom: rootBottom,\n update: updateRoot,\n} = useElementBounding(root, { windowScroll: false })\nconst targetRect = useElementBounding(target)\n\nconst fixed = ref(false)\nconst scrollTop = ref(0)\nconst transform = ref(0)\n\nconst rootStyle = computed<CSSProperties>(() => {\n return {\n height: fixed.value ? `${rootHeight.value}px` : '',\n width: fixed.value ? `${rootWidth.value}px` : '',\n }\n})\n\nconst affixStyle = computed<CSSProperties>(() => {\n if (!fixed.value) return {}\n\n const offset = props.offset ? addUnit(props.offset) : 0\n return {\n height: `${rootHeight.value}px`,\n width: `${rootWidth.value}px`,\n top: props.position === 'top' ? offset : '',\n bottom: props.position === 'bottom' ? offset : '',\n transform: transform.value ? `translateY(${transform.value}px)` : '',\n zIndex: props.zIndex,\n }\n})\n\nconst update = () => {\n if (!scrollContainer.value) return\n\n scrollTop.value =\n scrollContainer.value instanceof Window\n ? document.documentElement.scrollTop\n : scrollContainer.value.scrollTop || 0\n\n const { position, target, offset } = props\n const rootHeightOffset = offset + rootHeight.value\n\n if (position === 'top') {\n if (target) {\n const difference = targetRect.bottom.value - rootHeightOffset\n fixed.value = offset > rootTop.value && targetRect.bottom.value > 0\n transform.value = difference < 0 ? difference : 0\n } else {\n fixed.value = offset > rootTop.value\n }\n } else if (target) {\n const difference =\n windowHeight.value - targetRect.top.value - rootHeightOffset\n fixed.value =\n windowHeight.value - offset < rootBottom.value &&\n windowHeight.value > targetRect.top.value\n transform.value = difference < 0 ? -difference : 0\n } else {\n fixed.value = windowHeight.value - offset < rootBottom.value\n }\n}\n\nconst updateRootRect = async () => {\n if (!fixed.value) {\n updateRoot()\n return\n }\n\n fixed.value = false\n await nextTick()\n updateRoot()\n fixed.value = true\n}\n\nconst handleScroll = async () => {\n updateRoot()\n await nextTick()\n emit('scroll', {\n scrollTop: scrollTop.value,\n fixed: fixed.value,\n })\n}\n\nwatch(fixed, (val) => emit(CHANGE_EVENT, val))\n\nonMounted(() => {\n if (props.target) {\n target.value =\n document.querySelector<HTMLElement>(props.target) ?? undefined\n if (!target.value)\n throwError(COMPONENT_NAME, `Target does not exist: ${props.target}`)\n } else {\n target.value = document.documentElement\n }\n scrollContainer.value = getScrollContainer(root.value!, true)\n updateRoot()\n})\n\nuseEventListener(scrollContainer, 'scroll', handleScroll)\nwatchEffect(update)\n\ndefineExpose({\n /** @description update affix s
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