| import { WasmProvider } from './wasm-provider.js'; |
|
|
| let cachedGS: any = null; |
| let loadPromise: Promise<any> | null = null; |
|
|
| export interface GhostscriptInterface { |
| convertToPDFA(pdfBuffer: ArrayBuffer, profile: string): Promise<ArrayBuffer>; |
| fontToOutline(pdfBuffer: ArrayBuffer): Promise<ArrayBuffer>; |
| } |
|
|
| export async function loadGhostscript(): Promise<GhostscriptInterface> { |
| if (cachedGS) { |
| return cachedGS; |
| } |
|
|
| if (loadPromise) { |
| return loadPromise; |
| } |
|
|
| loadPromise = (async () => { |
| const baseUrl = WasmProvider.getUrl('ghostscript'); |
| if (!baseUrl) { |
| throw new Error( |
| 'Ghostscript is not configured. Please configure it in Advanced Settings.' |
| ); |
| } |
|
|
| const normalizedUrl = baseUrl.endsWith('/') ? baseUrl : `${baseUrl}/`; |
|
|
| try { |
| const wrapperUrl = `${normalizedUrl}gs.js`; |
|
|
| await loadScript(wrapperUrl); |
|
|
| const globalScope = |
| typeof globalThis !== 'undefined' ? globalThis : window; |
|
|
| if (typeof (globalScope as any).loadGS === 'function') { |
| cachedGS = await (globalScope as any).loadGS({ |
| baseUrl: normalizedUrl, |
| }); |
| } else if (typeof (globalScope as any).GhostscriptWASM === 'function') { |
| cachedGS = new (globalScope as any).GhostscriptWASM(normalizedUrl); |
| await cachedGS.init?.(); |
| } else { |
| throw new Error( |
| 'Ghostscript wrapper did not expose expected interface. Expected loadGS() or GhostscriptWASM class.' |
| ); |
| } |
|
|
| return cachedGS; |
| } catch (error: any) { |
| loadPromise = null; |
| throw new Error( |
| `Failed to load Ghostscript from ${normalizedUrl}: ${error.message}` |
| ); |
| } |
| })(); |
|
|
| return loadPromise; |
| } |
|
|
| function loadScript(url: string): Promise<void> { |
| return new Promise((resolve, reject) => { |
| if (document.querySelector(`script[src="${url}"]`)) { |
| resolve(); |
| return; |
| } |
|
|
| const script = document.createElement('script'); |
| script.src = url; |
| script.type = 'text/javascript'; |
| script.async = true; |
|
|
| script.onload = () => resolve(); |
| script.onerror = () => reject(new Error(`Failed to load script: ${url}`)); |
|
|
| document.head.appendChild(script); |
| }); |
| } |
|
|
| export function isGhostscriptAvailable(): boolean { |
| return WasmProvider.isConfigured('ghostscript'); |
| } |
|
|
| export function clearGhostscriptCache(): void { |
| cachedGS = null; |
| loadPromise = null; |
| } |
|
|
