| 1 | export type SlideSizePresetId = |
| 2 | | 'wide-16-9' |
| 3 | | 'vertical-9-16' |
| 4 | | 'standard-4-3' |
| 5 | | 'square-1-1' |
| 6 | | 'vertical-3-4' |
| 7 | | 'xiaohongshu-note' |
| 8 | |
| 9 | export interface SlideSizePreset { |
| 10 | id: SlideSizePresetId |
| 11 | label: string |
| 12 | width: number |
| 13 | height: number |
| 14 | } |
| 15 | |
| 16 | export const DEFAULT_SLIDE_SIZE_ID: SlideSizePresetId = 'wide-16-9' |
| 17 | |
| 18 | export const SLIDE_SIZE_PRESETS: readonly SlideSizePreset[] = [ |
| 19 | { id: 'wide-16-9', label: '宽屏 16:9', width: 1600, height: 900 }, |
| 20 | { id: 'vertical-9-16', label: '竖屏 9:16', width: 900, height: 1600 }, |
| 21 | { id: 'standard-4-3', label: '标准 4:3', width: 1600, height: 1200 }, |
| 22 | { id: 'square-1-1', label: '方图 1:1', width: 1200, height: 1200 }, |
| 23 | { id: 'vertical-3-4', label: '竖版 3:4', width: 1200, height: 1600 }, |
| 24 | { id: 'xiaohongshu-note', label: '小红书', width: 1242, height: 1660 } |
| 25 | ] as const |
| 26 | |
| 27 | const PRESET_BY_ID = new Map(SLIDE_SIZE_PRESETS.map((preset) => [preset.id, preset])) |
| 28 | |
| 29 | const toPositiveInteger = (value: unknown): number | undefined => { |
| 30 | const parsed = Number(value) |
| 31 | return Number.isFinite(parsed) && parsed > 0 ? Math.round(parsed) : undefined |
| 32 | } |
| 33 | |
| 34 | const isSlideSizePresetId = (value: unknown): value is SlideSizePresetId => |
| 35 | typeof value === 'string' && PRESET_BY_ID.has(value as SlideSizePresetId) |
| 36 | |
| 37 | export function resolveSlideSize(input?: { |
| 38 | id?: unknown |
| 39 | width?: unknown |
| 40 | height?: unknown |
| 41 | }): SlideSizePreset { |
| 42 | const id = isSlideSizePresetId(input?.id) ? input.id : DEFAULT_SLIDE_SIZE_ID |
| 43 | const preset = PRESET_BY_ID.get(id) ?? PRESET_BY_ID.get(DEFAULT_SLIDE_SIZE_ID)! |
| 44 | const width = toPositiveInteger(input?.width) |
| 45 | const height = toPositiveInteger(input?.height) |
| 46 | |
| 47 | return { |
| 48 | ...preset, |
| 49 | width: width ?? preset.width, |
| 50 | height: height ?? preset.height |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | export function requireSlideSize(input: { |
| 55 | id?: unknown |
| 56 | width?: unknown |
| 57 | height?: unknown |
| 58 | }): SlideSizePreset { |
| 59 | if (!isSlideSizePresetId(input.id)) { |
| 60 | throw new Error(`Invalid slide size id: ${String(input.id ?? '')}`) |
| 61 | } |
| 62 | const preset = PRESET_BY_ID.get(input.id)! |
| 63 | const width = input.width === undefined || input.width === null ? preset.width : toPositiveInteger(input.width) |
| 64 | const height = |
| 65 | input.height === undefined || input.height === null ? preset.height : toPositiveInteger(input.height) |
| 66 | if (!width || !height) { |
| 67 | throw new Error(`Invalid slide size dimensions for ${input.id}`) |
| 68 | } |
| 69 | return { ...preset, width, height } |
| 70 | } |
| 71 | |
| 72 | export const requireSlideSizePreset = (id: unknown): SlideSizePreset => requireSlideSize({ id }) |
| 73 | |
| 74 | export function requirePersistedSlideSize(input: { |
| 75 | id?: unknown |
| 76 | width?: unknown |
| 77 | height?: unknown |
| 78 | }): SlideSizePreset { |
| 79 | if (!isSlideSizePresetId(input.id)) { |
| 80 | throw new Error(`Invalid slide size id: ${String(input.id ?? '')}`) |
| 81 | } |
| 82 | if (input.width === undefined || input.width === null || input.height === undefined || input.height === null) { |
| 83 | throw new Error(`Invalid slide size dimensions for ${String(input.id ?? '')}`) |
| 84 | } |
| 85 | return requireSlideSize(input) |
| 86 | } |
| 87 | |
| 88 | export function resolveSessionSlideSize(session?: unknown): SlideSizePreset { |
| 89 | return requireSessionSlideSize(session) |
| 90 | } |
| 91 | |
| 92 | export function trySessionSlideSize(session?: unknown): SlideSizePreset | null { |
| 93 | if (!session) return null |
| 94 | try { |
| 95 | return requireSessionSlideSize(session) |
| 96 | } catch { |
| 97 | return null |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | export function requireSessionSlideSize(session: unknown): SlideSizePreset { |
| 102 | const record = |
| 103 | session && typeof session === 'object' && !Array.isArray(session) |
| 104 | ? (session as Record<string, unknown>) |
| 105 | : {} |
| 106 | return requirePersistedSlideSize({ |
| 107 | id: record.slideSizeId ?? record.slide_size_id, |
| 108 | width: record.slideWidth ?? record.slide_width, |
| 109 | height: record.slideHeight ?? record.slide_height |
| 110 | }) |
| 111 | } |
| 112 | |
| 113 | export function resolveSlideSizeFromHtml(html: string): SlideSizePreset { |
| 114 | return requireSlideSizeFromHtml(html) |
| 115 | } |
| 116 | |
| 117 | export function requireSlideSizeFromHtml(html: string): SlideSizePreset { |
| 118 | const metadataMatch = html.match( |
| 119 | /<script[^>]+id=["']deck-metadata["'][^>]*>([\s\S]*?)<\/script>/i |
| 120 | ) |
| 121 | if (metadataMatch?.[1]) { |
| 122 | const metadata = JSON.parse(metadataMatch[1]) as Record<string, unknown> |
| 123 | return requirePersistedSlideSize({ |
| 124 | id: metadata.slideSizeId, |
| 125 | width: metadata.width, |
| 126 | height: metadata.height |
| 127 | }) |
| 128 | } |
| 129 | return requirePersistedSlideSize({ |
| 130 | id: html.match(/\bdata-ppt-slide-size-id=["']([^"']+)["']/i)?.[1], |
| 131 | width: html.match(/\bdata-ppt-width=["'](\d+)["']/i)?.[1], |
| 132 | height: html.match(/\bdata-ppt-height=["'](\d+)["']/i)?.[1] |
| 133 | }) |
| 134 | } |
| 135 | |
| 136 | export const isDefaultSlideSize = (slideSize: SlideSizePreset): boolean => |
| 137 | slideSize.id === DEFAULT_SLIDE_SIZE_ID && |
| 138 | slideSize.width === 1600 && |
| 139 | slideSize.height === 900 |
| 140 | |
| 141 | export type PptxExportSlideSizeId = Extract< |
| 142 | SlideSizePresetId, |
| 143 | 'wide-16-9' | 'standard-4-3' |
| 144 | > |
| 145 | |
| 146 | export const isPptxExportSupported = ( |
| 147 | slideSize: SlideSizePreset |
| 148 | ): slideSize is SlideSizePreset & { id: PptxExportSlideSizeId } => |
| 149 | slideSize.id === 'wide-16-9' || slideSize.id === 'standard-4-3' |
| 150 | |
| 151 | export const PPTX_SLIDE_SIZE_ERROR = |
| 152 | '当前 PPTX 导出仅支持 16:9 和 4:3。请使用这两种演示尺寸，或导出 PNG/PDF/视频。' |
| 153 | |
| 154 | export function assertPptxExportSupported(slideSize: SlideSizePreset): void { |
| 155 | if (!isPptxExportSupported(slideSize)) throw new Error(PPTX_SLIDE_SIZE_ERROR) |
| 156 | } |
| 157 |