84 lines
1.8 KiB
Vue
84 lines
1.8 KiB
Vue
<script>
|
|
export default {
|
|
inject: ['vscrollParent'],
|
|
props: {
|
|
maxLength: {
|
|
type: Number,
|
|
required: true,
|
|
},
|
|
},
|
|
data() {
|
|
return {
|
|
nextIndex: -1,
|
|
nextItem: null,
|
|
startedRender: false,
|
|
width: 0,
|
|
};
|
|
},
|
|
mounted() {
|
|
this.width = this.$el.parentNode.offsetWidth;
|
|
|
|
this.$_itemsWithSizeWatcher = this.$watch('vscrollParent.itemsWithSize', async () => {
|
|
await this.$nextTick();
|
|
|
|
const nextItem = this.findNextToRender();
|
|
|
|
if (nextItem) {
|
|
this.startedRender = true;
|
|
requestIdleCallback(() => {
|
|
this.nextItem = nextItem;
|
|
|
|
if (this.nextIndex === this.maxLength - 1) {
|
|
this.$nextTick(() => {
|
|
if (this.vscrollParent.itemsWithSize[this.maxLength - 1].size !== 0) {
|
|
this.clearRendering();
|
|
}
|
|
});
|
|
}
|
|
});
|
|
} else if (this.startedRender) {
|
|
this.clearRendering();
|
|
}
|
|
});
|
|
},
|
|
beforeDestroy() {
|
|
this.$_itemsWithSizeWatcher();
|
|
},
|
|
methods: {
|
|
clearRendering() {
|
|
this.nextItem = null;
|
|
|
|
if (this.maxLength === this.vscrollParent.itemsWithSize.length) {
|
|
this.$_itemsWithSizeWatcher();
|
|
}
|
|
},
|
|
findNextToRender() {
|
|
return this.vscrollParent.itemsWithSize.find(({ size }, index) => {
|
|
const isNext = size === 0;
|
|
|
|
if (isNext) {
|
|
this.nextIndex = index;
|
|
}
|
|
|
|
return isNext;
|
|
});
|
|
},
|
|
},
|
|
};
|
|
</script>
|
|
|
|
<template>
|
|
<div v-if="nextItem" :style="{ width: `${width}px` }" class="gl-absolute diff-file-offscreen">
|
|
<slot
|
|
v-bind="{ item: nextItem.item, index: nextIndex, active: true, itemWithSize: nextItem }"
|
|
></slot>
|
|
</div>
|
|
</template>
|
|
|
|
<style scoped>
|
|
.diff-file-offscreen {
|
|
top: -200%;
|
|
left: -200%;
|
|
}
|
|
</style>
|