| 1 | import type { SlidevContextNavFull } from '../composables/useNav' |
| 2 | import type { ScreenshotSession } from './screenshot' |
| 3 | import { sleep } from '@antfu/utils' |
| 4 | import { slideHeight, slideWidth } from '../env' |
| 5 | import { captureDelay, disableTransition } from '../state' |
| 6 | import { snapshotState } from '../state/snapshot' |
| 7 | import { isDark } from './dark' |
| 8 | import { startScreenshotSession } from './screenshot' |
| 9 | import { getSlide } from './slides' |
| 10 | |
| 11 | const chromeVersion = window.navigator.userAgent.match(/Chrome\/(\d+)/)?.[1] |
| 12 | export const isScreenshotSupported = chromeVersion ? Number(chromeVersion) >= 94 : false |
| 13 | |
| 14 | const initialWait = 100 |
| 15 | |
| 16 | export class SlideSnapshotManager { |
| 17 | private _screenshotSession: ScreenshotSession | null = null |
| 18 | |
| 19 | getSnapshot(slideNo: number, isDark: boolean) { |
| 20 | const id = slideNo + (isDark ? '-dark' : '-light') |
| 21 | const data = snapshotState.state[id] |
| 22 | if (!data) { |
| 23 | return |
| 24 | } |
| 25 | const slide = getSlide(slideNo) |
| 26 | if (!slide) { |
| 27 | return |
| 28 | } |
| 29 | if (data?.revision === slide?.meta.slide.revision) { |
| 30 | return data.image |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | private async saveSnapshot(slideNo: number, dataUrl: string, isDark: boolean) { |
| 35 | if (!__DEV__) |
| 36 | return false |
| 37 | const slide = getSlide(slideNo) |
| 38 | if (!slide) |
| 39 | return false |
| 40 | |
| 41 | const id = slideNo + (isDark ? '-dark' : '-light') |
| 42 | const revision = slide.meta.slide.revision |
| 43 | snapshotState.patch(id, { |
| 44 | revision, |
| 45 | image: dataUrl, |
| 46 | }) |
| 47 | } |
| 48 | |
| 49 | async startCapturing(nav: SlidevContextNavFull) { |
| 50 | if (!__DEV__) |
| 51 | return false |
| 52 | |
| 53 | // TODO: show a dialog to confirm |
| 54 | |
| 55 | if (this._screenshotSession) { |
| 56 | this._screenshotSession.dispose() |
| 57 | this._screenshotSession = null |
| 58 | } |
| 59 | |
| 60 | try { |
| 61 | this._screenshotSession = await startScreenshotSession( |
| 62 | slideWidth.value, |
| 63 | slideHeight.value, |
| 64 | ) |
| 65 | |
| 66 | disableTransition.value = true |
| 67 | nav.go(1, 0, true) |
| 68 | |
| 69 | await sleep(initialWait + captureDelay.value) |
| 70 | while (true) { |
| 71 | if (!this._screenshotSession) { |
| 72 | break |
| 73 | } |
| 74 | this.saveSnapshot( |
| 75 | nav.currentSlideNo.value, |
| 76 | this._screenshotSession.screenshot(document.getElementById('slide-content')!), |
| 77 | isDark.value, |
| 78 | ) |
| 79 | if (nav.hasNext.value) { |
| 80 | await sleep(captureDelay.value) |
| 81 | nav.nextSlide(true) |
| 82 | await sleep(captureDelay.value) |
| 83 | } |
| 84 | else { |
| 85 | break |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | // TODO: show a message when done |
| 90 | |
| 91 | return true |
| 92 | } |
| 93 | catch (e) { |
| 94 | console.error(e) |
| 95 | return false |
| 96 | } |
| 97 | finally { |
| 98 | disableTransition.value = false |
| 99 | if (this._screenshotSession) { |
| 100 | this._screenshotSession.dispose() |
| 101 | this._screenshotSession = null |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | export const snapshotManager = new SlideSnapshotManager() |
| 108 |