misskey/packages/frontend/src/components/MkFolder.vue

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Vue
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<template>
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<div ref="rootEl" class="dwzlatin" :class="{ opened }">
<div class="header _button" @click="toggle">
<span class="icon"><slot name="icon"></slot></span>
<span class="text"><slot name="label"></slot></span>
<span class="right">
<span class="text"><slot name="suffix"></slot></span>
<i v-if="opened" class="ti ti-chevron-up icon"></i>
<i v-else class="ti ti-chevron-down icon"></i>
</span>
</div>
<div v-if="openedAtLeastOnce" class="body" :class="{ bgSame }" :style="{ maxHeight: maxHeight ? `${maxHeight}px` : null }">
<Transition
:name="$store.state.animation ? 'folder-toggle' : ''"
@enter="enter"
@after-enter="afterEnter"
@leave="leave"
@after-leave="afterLeave"
>
<KeepAlive>
<div v-show="opened">
<MkSpacer :margin-min="14" :margin-max="22">
<slot></slot>
</MkSpacer>
</div>
</KeepAlive>
</Transition>
</div>
</div>
</template>
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<script lang="ts" setup>
import { nextTick, onMounted } from 'vue';
const props = withDefaults(defineProps<{
defaultOpen: boolean;
maxHeight: number | null;
}>(), {
defaultOpen: false,
maxHeight: null,
});
const getBgColor = (el: HTMLElement) => {
const style = window.getComputedStyle(el);
if (style.backgroundColor && !['rgba(0, 0, 0, 0)', 'rgba(0,0,0,0)', 'transparent'].includes(style.backgroundColor)) {
return style.backgroundColor;
} else {
return el.parentElement ? getBgColor(el.parentElement) : 'transparent';
}
};
let rootEl = $ref<HTMLElement>();
let bgSame = $ref(false);
let opened = $ref(props.defaultOpen);
let openedAtLeastOnce = $ref(props.defaultOpen);
function enter(el) {
const elementHeight = el.getBoundingClientRect().height;
el.style.height = 0;
el.offsetHeight; // reflow
el.style.height = Math.min(elementHeight, props.maxHeight ?? Infinity) + 'px';
}
function afterEnter(el) {
el.style.height = null;
}
function leave(el) {
const elementHeight = el.getBoundingClientRect().height;
el.style.height = elementHeight + 'px';
el.offsetHeight; // reflow
el.style.height = 0;
}
function afterLeave(el) {
el.style.height = null;
}
function toggle() {
if (!opened) {
openedAtLeastOnce = true;
}
nextTick(() => {
opened = !opened;
});
}
onMounted(() => {
const computedStyle = getComputedStyle(document.documentElement);
const parentBg = getBgColor(rootEl.parentElement);
const myBg = computedStyle.getPropertyValue('--panel');
bgSame = parentBg === myBg;
});
</script>
<style lang="scss" scoped>
.folder-toggle-enter-active, .folder-toggle-leave-active {
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overflow-y: clip;
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transition: opacity 0.3s, height 0.3s, transform 0.3s !important;
}
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.folder-toggle-enter-from, .folder-toggle-leave-to {
opacity: 0;
}
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.dwzlatin {
display: block;
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> .header {
display: flex;
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align-items: center;
width: 100%;
box-sizing: border-box;
padding: 10px 14px 10px 14px;
background: var(--buttonBg);
border-radius: 6px;
&:hover {
text-decoration: none;
background: var(--buttonHoverBg);
}
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&.active {
color: var(--accent);
background: var(--buttonHoverBg);
}
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> .icon {
margin-right: 0.75em;
flex-shrink: 0;
text-align: center;
opacity: 0.8;
&:empty {
display: none;
& + .text {
padding-left: 4px;
}
}
}
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> .text {
white-space: nowrap;
text-overflow: ellipsis;
overflow: hidden;
padding-right: 12px;
}
> .right {
margin-left: auto;
opacity: 0.7;
white-space: nowrap;
> .text:not(:empty) {
margin-right: 0.75em;
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}
}
}
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> .body {
background: var(--panel);
border-radius: 0 0 6px 6px;
container-type: inline-size;
overflow: auto;
&.bgSame {
background: var(--bg);
}
}
&.opened {
> .header {
border-radius: 6px 6px 0 0;
}
}
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}
</style>