| 1 | import { computed, ref } from 'vue' |
| 2 | import { slides } from './slides' |
| 3 | |
| 4 | // To have same format(.value) as max, wrap it with ref. |
| 5 | const min = ref(1) |
| 6 | const max = computed(() => slides.value.length) |
| 7 | |
| 8 | export const currentOverviewPage = ref(0) |
| 9 | export const overviewRowCount = ref(0) |
| 10 | |
| 11 | export function prevOverviewPage() { |
| 12 | if (currentOverviewPage.value > min.value) |
| 13 | currentOverviewPage.value -= 1 |
| 14 | } |
| 15 | |
| 16 | export function nextOverviewPage() { |
| 17 | if (currentOverviewPage.value < max.value) |
| 18 | currentOverviewPage.value += 1 |
| 19 | } |
| 20 | |
| 21 | export function upOverviewPage() { |
| 22 | if (currentOverviewPage.value > min.value) { |
| 23 | let current = currentOverviewPage.value - overviewRowCount.value |
| 24 | if (current < min.value) |
| 25 | current = min.value |
| 26 | |
| 27 | currentOverviewPage.value = current |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | export function downOverviewPage() { |
| 32 | if (currentOverviewPage.value < max.value) { |
| 33 | let current = currentOverviewPage.value + overviewRowCount.value |
| 34 | if (current > max.value) |
| 35 | current = max.value |
| 36 | |
| 37 | currentOverviewPage.value = current |
| 38 | } |
| 39 | } |
| 40 |