497 lines
11 KiB
Vue
497 lines
11 KiB
Vue
<template>
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<transition :name="$store.state.animation ? 'fade' : ''" mode="out-in">
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<MkLoading v-if="fetching" />
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<MkError v-else-if="error" @retry="init()" />
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<div v-else-if="empty" key="_empty_" class="empty">
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<slot name="empty">
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<div class="_fullinfo">
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<img
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src="/static-assets/badges/info.png"
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class="_ghost"
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alt="Error"
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/>
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<div>{{ i18n.ts.nothing }}</div>
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</div>
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</slot>
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</div>
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<div v-else ref="rootEl" class="list">
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<div
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v-show="pagination.reversed && more"
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key="_more_"
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class="cxiknjgy _gap"
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>
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<MkButton
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v-if="!moreFetching"
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class="button"
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:disabled="moreFetching"
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:style="{ cursor: moreFetching ? 'wait' : 'pointer' }"
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primary
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@click="fetchMoreAhead"
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>
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{{ i18n.ts.loadMore }}
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</MkButton>
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<MkLoading v-else class="loading" />
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</div>
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<slot :items="items"></slot>
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<div
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v-show="!pagination.reversed && more"
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key="_more_"
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class="cxiknjgy _gap"
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>
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<MkButton
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v-if="!moreFetching"
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v-appear="
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$store.state.enableInfiniteScroll && !disableAutoLoad
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? fetchMore
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: null
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"
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class="button"
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:disabled="moreFetching"
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:style="{ cursor: moreFetching ? 'wait' : 'pointer' }"
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primary
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@click="fetchMore"
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>
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{{ i18n.ts.loadMore }}
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</MkButton>
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<MkLoading v-else class="loading" />
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</div>
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</div>
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</transition>
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</template>
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<script lang="ts" setup>
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import {
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computed,
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ComputedRef,
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isRef,
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markRaw,
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onActivated,
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onDeactivated,
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Ref,
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ref,
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watch,
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} from "vue";
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import * as misskey from "calckey-js";
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import * as os from "@/os";
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import {
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onScrollTop,
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isTopVisible,
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getScrollPosition,
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getScrollContainer,
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} from "@/scripts/scroll";
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import MkButton from "@/components/MkButton.vue";
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import { i18n } from "@/i18n";
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export type Paging<
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E extends keyof misskey.Endpoints = keyof misskey.Endpoints
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> = {
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endpoint: E;
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limit: number;
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params?:
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| misskey.Endpoints[E]["req"]
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| ComputedRef<misskey.Endpoints[E]["req"]>;
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/**
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* 検索APIのような、ページング不可なエンドポイントを利用する場合
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* (そのようなAPIをこの関数で使うのは若干矛盾してるけど)
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*/
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noPaging?: boolean;
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/**
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* items 配列の中身を逆順にする(新しい方が最後)
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*/
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reversed?: boolean;
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offsetMode?: boolean;
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};
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const SECOND_FETCH_LIMIT = 30;
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const props = withDefaults(
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defineProps<{
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pagination: Paging;
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disableAutoLoad?: boolean;
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displayLimit?: number;
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}>(),
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{
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displayLimit: 30,
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}
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);
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const emit = defineEmits<{
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(ev: "queue", count: number): void;
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}>();
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type Item = { id: string; [another: string]: unknown };
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const rootEl = ref<HTMLElement>();
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const items = ref<Item[]>([]);
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const queue = ref<Item[]>([]);
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const offset = ref(0);
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const fetching = ref(true);
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const moreFetching = ref(false);
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const more = ref(false);
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const backed = ref(false); // 遡り中か否か
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const isBackTop = ref(false);
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const empty = computed(() => items.value.length === 0);
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const error = ref(false);
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const init = async (): Promise<void> => {
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queue.value = [];
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fetching.value = true;
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const params = props.pagination.params
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? isRef(props.pagination.params)
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? props.pagination.params.value
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: props.pagination.params
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: {};
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await os
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.api(props.pagination.endpoint, {
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...params,
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limit: props.pagination.noPaging
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? props.pagination.limit || 10
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: (props.pagination.limit || 10) + 1,
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})
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.then(
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(res) => {
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for (let i = 0; i < res.length; i++) {
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const item = res[i];
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if (props.pagination.reversed) {
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if (i === res.length - 2) item._shouldInsertAd_ = true;
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} else {
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if (i === 3) item._shouldInsertAd_ = true;
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}
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}
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if (
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!props.pagination.noPaging &&
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res.length > (props.pagination.limit || 10)
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) {
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res.pop();
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items.value = props.pagination.reversed
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? [...res].reverse()
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: res;
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more.value = true;
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} else {
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items.value = props.pagination.reversed
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? [...res].reverse()
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: res;
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more.value = false;
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}
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offset.value = res.length;
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error.value = false;
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fetching.value = false;
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},
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(err) => {
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error.value = true;
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fetching.value = false;
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}
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);
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};
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const reload = (): void => {
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items.value = [];
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init();
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};
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const refresh = async (): void => {
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const params = props.pagination.params
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? isRef(props.pagination.params)
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? props.pagination.params.value
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: props.pagination.params
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: {};
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await os
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.api(props.pagination.endpoint, {
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...params,
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limit: items.value.length + 1,
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offset: 0,
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})
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.then(
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(res) => {
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let ids = items.value.reduce((a, b) => {
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a[b.id] = true;
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return a;
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}, {} as { [id: string]: boolean });
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for (let i = 0; i < res.length; i++) {
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const item = res[i];
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if (!updateItem(item.id, (old) => item)) {
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append(item);
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}
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delete ids[item.id];
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}
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for (const id in ids) {
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removeItem((i) => i.id === id);
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}
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},
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(err) => {
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error.value = true;
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fetching.value = false;
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}
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);
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};
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const fetchMore = async (): Promise<void> => {
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if (
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!more.value ||
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fetching.value ||
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moreFetching.value ||
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items.value.length === 0
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)
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return;
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moreFetching.value = true;
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backed.value = true;
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const params = props.pagination.params
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? isRef(props.pagination.params)
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? props.pagination.params.value
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: props.pagination.params
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: {};
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await os
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.api(props.pagination.endpoint, {
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...params,
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limit: SECOND_FETCH_LIMIT + 1,
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...(props.pagination.offsetMode
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? {
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offset: offset.value,
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}
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: props.pagination.reversed
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? {
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sinceId: items.value[0].id,
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}
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: {
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untilId: items.value[items.value.length - 1].id,
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}),
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})
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.then(
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(res) => {
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for (let i = 0; i < res.length; i++) {
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const item = res[i];
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if (props.pagination.reversed) {
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if (i === res.length - 9) item._shouldInsertAd_ = true;
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} else {
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if (i === 10) item._shouldInsertAd_ = true;
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}
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}
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if (res.length > SECOND_FETCH_LIMIT) {
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res.pop();
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items.value = props.pagination.reversed
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? [...res].reverse().concat(items.value)
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: items.value.concat(res);
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more.value = true;
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} else {
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items.value = props.pagination.reversed
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? [...res].reverse().concat(items.value)
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: items.value.concat(res);
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more.value = false;
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}
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offset.value += res.length;
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moreFetching.value = false;
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},
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(err) => {
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moreFetching.value = false;
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}
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);
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};
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const fetchMoreAhead = async (): Promise<void> => {
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if (
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!more.value ||
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fetching.value ||
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moreFetching.value ||
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items.value.length === 0
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)
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return;
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moreFetching.value = true;
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const params = props.pagination.params
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? isRef(props.pagination.params)
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? props.pagination.params.value
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: props.pagination.params
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: {};
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await os
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.api(props.pagination.endpoint, {
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...params,
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limit: SECOND_FETCH_LIMIT + 1,
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...(props.pagination.offsetMode
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? {
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offset: offset.value,
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}
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: props.pagination.reversed
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? {
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untilId: items.value[0].id,
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}
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: {
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sinceId: items.value[items.value.length - 1].id,
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}),
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})
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.then(
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(res) => {
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if (res.length > SECOND_FETCH_LIMIT) {
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res.pop();
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items.value = props.pagination.reversed
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? [...res].reverse().concat(items.value)
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: items.value.concat(res);
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more.value = true;
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} else {
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items.value = props.pagination.reversed
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? [...res].reverse().concat(items.value)
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: items.value.concat(res);
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more.value = false;
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}
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offset.value += res.length;
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moreFetching.value = false;
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},
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(err) => {
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moreFetching.value = false;
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}
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);
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};
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const prepend = (item: Item): void => {
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if (props.pagination.reversed) {
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if (rootEl.value) {
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const container = getScrollContainer(rootEl.value);
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if (container == null) {
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// TODO?
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} else {
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const pos = getScrollPosition(rootEl.value);
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const viewHeight = container.clientHeight;
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const height = container.scrollHeight;
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const isBottom = pos + viewHeight > height - 32;
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if (isBottom) {
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// オーバーフローしたら古いアイテムは捨てる
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if (items.value.length >= props.displayLimit) {
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// このやり方だとVue 3.2以降アニメーションが動かなくなる
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//items.value = items.value.slice(-props.displayLimit);
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while (items.value.length >= props.displayLimit) {
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items.value.shift();
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}
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more.value = true;
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}
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}
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}
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}
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items.value.push(item);
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// TODO
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} else {
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// 初回表示時はunshiftだけでOK
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if (!rootEl.value) {
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items.value.unshift(item);
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return;
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}
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const isTop =
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isBackTop.value ||
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(document.body.contains(rootEl.value) &&
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isTopVisible(rootEl.value));
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if (isTop) {
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// Prepend the item
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items.value.unshift(item);
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// オーバーフローしたら古いアイテムは捨てる
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if (items.value.length >= props.displayLimit) {
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// このやり方だとVue 3.2以降アニメーションが動かなくなる
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//this.items = items.value.slice(0, props.displayLimit);
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while (items.value.length >= props.displayLimit) {
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items.value.pop();
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}
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more.value = true;
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}
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} else {
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queue.value.push(item);
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onScrollTop(rootEl.value, () => {
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for (const queueItem of queue.value) {
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prepend(queueItem);
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}
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queue.value = [];
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});
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}
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}
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};
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const append = (item: Item): void => {
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items.value.push(item);
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};
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const removeItem = (finder: (item: Item) => boolean): boolean => {
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const i = items.value.findIndex(finder);
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if (i === -1) {
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return false;
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}
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items.value.splice(i, 1);
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return true;
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};
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const updateItem = (id: Item["id"], replacer: (old: Item) => Item): boolean => {
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const i = items.value.findIndex((item) => item.id === id);
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if (i === -1) {
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return false;
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}
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items.value[i] = replacer(items.value[i]);
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return true;
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};
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if (props.pagination.params && isRef(props.pagination.params)) {
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watch(props.pagination.params, init, { deep: true });
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}
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watch(
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queue,
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(a, b) => {
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if (a.length === 0 && b.length === 0) return;
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emit("queue", queue.value.length);
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},
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{ deep: true }
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);
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init();
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onActivated(() => {
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isBackTop.value = false;
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});
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onDeactivated(() => {
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isBackTop.value = window.scrollY === 0;
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});
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defineExpose({
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items,
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queue,
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backed,
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reload,
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refresh,
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prepend,
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append,
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removeItem,
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updateItem,
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});
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</script>
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<style lang="scss" scoped>
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.fade-enter-active,
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.fade-leave-active {
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transition: opacity 0.125s ease;
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}
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.fade-enter-from,
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.fade-leave-to {
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opacity: 0;
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}
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.cxiknjgy {
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> .button {
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margin-left: auto;
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margin-right: auto;
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}
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}
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.list > :deep(._button) {
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margin-inline: auto;
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margin-bottom: 16px;
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&:last-of-type:not(:first-child) {
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margin-top: 16px;
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}
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}
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</style>
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