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index.js
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154 lines (135 loc) · 3.61 KB
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import { createNamespace } from '../utils';
import { BORDER } from '../utils/constant';
const [createComponent, bem, t] = createNamespace('pagination');
function makePage(number, text, active) {
return { number, text, active };
}
export default createComponent({
props: {
prevText: String,
nextText: String,
forceEllipses: Boolean,
value: {
type: Number,
default: 0
},
pageCount: {
type: Number,
default: 0
},
totalItems: {
type: Number,
default: 0
},
mode: {
type: String,
default: 'multi'
},
itemsPerPage: {
type: Number,
default: 10
},
showPageSize: {
type: Number,
default: 5
}
},
computed: {
count() {
const count = this.pageCount || Math.ceil(this.totalItems / this.itemsPerPage);
return Math.max(1, count);
},
pages() {
const pages = [];
const pageCount = this.count;
if (this.mode !== 'multi') {
return pages;
}
// Default page limits
let startPage = 1;
let endPage = pageCount;
const isMaxSized = this.showPageSize !== undefined && this.showPageSize < pageCount;
// recompute if showPageSize
if (isMaxSized) {
// Current page is displayed in the middle of the visible ones
startPage = Math.max(this.value - Math.floor(this.showPageSize / 2), 1);
endPage = startPage + this.showPageSize - 1;
// Adjust if limit is exceeded
if (endPage > pageCount) {
endPage = pageCount;
startPage = endPage - this.showPageSize + 1;
}
}
// Add page number links
for (let number = startPage; number <= endPage; number++) {
const page = makePage(number, number, number === this.value);
pages.push(page);
}
// Add links to move between page sets
if (isMaxSized && this.showPageSize > 0 && this.forceEllipses) {
if (startPage > 1) {
const previousPageSet = makePage(startPage - 1, '...', false);
pages.unshift(previousPageSet);
}
if (endPage < pageCount) {
const nextPageSet = makePage(endPage + 1, '...', false);
pages.push(nextPageSet);
}
}
return pages;
}
},
watch: {
value: {
handler(page) {
this.select(page || this.value);
},
immediate: true
}
},
methods: {
select(page, emitChange) {
page = Math.min(this.count, Math.max(1, page));
if (this.value !== page) {
this.$emit('input', page);
if (emitChange) {
this.$emit('change', page);
}
}
}
},
render() {
const { value } = this;
const simple = this.mode !== 'multi';
const onSelect = value => () => {
this.select(value, true);
};
return (
<ul class={bem({ simple })}>
<li
class={[bem('item', { disabled: value === 1 }), bem('prev'), BORDER]}
onClick={onSelect(value - 1)}
>
{this.prevText || t('prev')}
</li>
{this.pages.map(page => (
<li
class={[bem('item', { active: page.active }), bem('page'), BORDER]}
onClick={onSelect(page.number)}
>
{page.text}
</li>
))}
{simple && (
<li class={bem('page-desc')}>{this.slots('pageDesc') || `${value}/${this.count}`}</li>
)}
<li
class={[bem('item', { disabled: value === this.count }), bem('next'), BORDER]}
onClick={onSelect(value + 1)}
>
{this.nextText || t('next')}
</li>
</ul>
);
}
});