<template>
|
<el-scrollbar ref="scrollContainerRef" :vertical="false" class="scroll-container" @wheel.prevent="handleScroll">
|
<slot />
|
</el-scrollbar>
|
</template>
|
|
<script setup lang="ts">
|
import useTagsViewStore from '@/store/modules/tagsView'
|
import { TagView } from 'vue-router'
|
const tagAndTagSpacing = ref(4);
|
|
const scrollContainerRef = ref<ElScrollbarInstance>()
|
const scrollWrapper = computed(() => scrollContainerRef.value?.$refs.wrapRef as any);
|
|
onMounted(() => {
|
scrollWrapper.value?.addEventListener('scroll', emitScroll, true)
|
})
|
onBeforeUnmount(() => {
|
scrollWrapper.value?.removeEventListener('scroll', emitScroll)
|
})
|
|
const handleScroll = (e: WheelEvent) => {
|
const eventDelta = (e as any).wheelDelta || - e.deltaY * 40
|
const $scrollWrapper = scrollWrapper.value;
|
$scrollWrapper.scrollLeft = $scrollWrapper.scrollLeft + eventDelta / 4
|
}
|
const emits = defineEmits(['scroll'])
|
const emitScroll = () => {
|
emits('scroll')
|
}
|
|
const tagsViewStore = useTagsViewStore()
|
const visitedViews = computed(() => tagsViewStore.visitedViews);
|
|
const moveToTarget = (currentTag: TagView) => {
|
const $container = scrollContainerRef.value?.$el
|
const $containerWidth = $container.offsetWidth
|
const $scrollWrapper = scrollWrapper.value;
|
|
let firstTag = null
|
let lastTag = null
|
|
// find first tag and last tag
|
if (visitedViews.value.length > 0) {
|
firstTag = visitedViews.value[0]
|
lastTag = visitedViews.value[visitedViews.value.length - 1]
|
}
|
|
if (firstTag === currentTag) {
|
$scrollWrapper.scrollLeft = 0
|
} else if (lastTag === currentTag) {
|
$scrollWrapper.scrollLeft = $scrollWrapper.scrollWidth - $containerWidth
|
} else {
|
const tagListDom: any = document.getElementsByClassName('tags-view-item');
|
const currentIndex = visitedViews.value.findIndex(item => item === currentTag)
|
let prevTag = null
|
let nextTag = null
|
|
for (const k in tagListDom) {
|
if (k !== 'length' && Object.hasOwnProperty.call(tagListDom, k)) {
|
if (tagListDom[k].dataset.path === visitedViews.value[currentIndex - 1].path) {
|
prevTag = tagListDom[k];
|
}
|
if (tagListDom[k].dataset.path === visitedViews.value[currentIndex + 1].path) {
|
nextTag = tagListDom[k];
|
}
|
}
|
}
|
|
// the tag's offsetLeft after of nextTag
|
const afterNextTagOffsetLeft = nextTag.offsetLeft + nextTag.offsetWidth + tagAndTagSpacing.value
|
|
// the tag's offsetLeft before of prevTag
|
const beforePrevTagOffsetLeft = prevTag.offsetLeft - tagAndTagSpacing.value
|
if (afterNextTagOffsetLeft > $scrollWrapper.scrollLeft + $containerWidth) {
|
$scrollWrapper.scrollLeft = afterNextTagOffsetLeft - $containerWidth
|
} else if (beforePrevTagOffsetLeft < $scrollWrapper.scrollLeft) {
|
$scrollWrapper.scrollLeft = beforePrevTagOffsetLeft
|
}
|
}
|
}
|
|
defineExpose({
|
moveToTarget,
|
})
|
</script>
|
|
<style lang="scss" scoped>
|
.scroll-container {
|
white-space: nowrap;
|
position: relative;
|
overflow: hidden;
|
width: 100%;
|
:deep(.el-scrollbar__bar) {
|
bottom: 0px;
|
}
|
:deep(.el-scrollbar__wrap) {
|
height: 49px;
|
}
|
}
|
</style>
|
