Allow explicit PDF.js resource paths for bundler compatibility

Bundlers like Vite cannot resolve directory paths (cmaps/, standard_fonts/)
through the new URL(..., import.meta.url) pattern. Add optional config to
makePDF, makeBook, and View.open so consumers can provide explicit URLs.

When options are not provided, falls back to import.meta.url resolution
(preserving existing behavior for direct module usage).

pdf.js

@@ -129,7 +129,12 @@ const makeTOCItem = (item) => ({
   subitems: item.items.length ? item.items.map(makeTOCItem) : null,
 });
 
-export const makePDF = async (file) => {
+export const makePDF = async (file, options = {}) => {
+  const cMapUrl = options.cMapUrl ?? pdfjsPath("cmaps/");
+  const standardFontDataUrl = options.standardFontDataUrl ?? pdfjsPath("standard_fonts/");
+  if (options.workerSrc) {
+    pdfjsLib.GlobalWorkerOptions.workerSrc = options.workerSrc;
+  }
   const transport = new pdfjsLib.PDFDataRangeTransport(file.size, []);
   transport.requestDataRange = (begin, end) => {
     file
@@ -141,8 +146,8 @@ export const makePDF = async (file) => {
   };
   const pdf = await pdfjsLib.getDocument({
     range: transport,
-    cMapUrl: pdfjsPath("cmaps/"),
-    standardFontDataUrl: pdfjsPath("standard_fonts/"),
+    cMapUrl,
+    standardFontDataUrl,
     isEvalSupported: false,
   }).promise;
 

view.js

@@ -76,7 +76,7 @@ const fetchFile = async url => {
     return new File([await res.blob()], new URL(res.url).pathname)
 }
 
-export const makeBook = async file => {
+export const makeBook = async (file, options = {}) => {
     if (typeof file === 'string') file = await fetchFile(file)
     let book
     if (file.isDirectory) {
@@ -105,7 +105,7 @@ export const makeBook = async file => {
     }
     else if (await isPDF(file)) {
         const { makePDF } = await import('./pdf.js')
-        book = await makePDF(file)
+        book = await makePDF(file, options.pdf)
     }
     else {
         const { isMOBI, MOBI } = await import('./mobi.js')
@@ -230,10 +230,10 @@ export class View extends HTMLElement {
             this.renderer.goTo(resolved)
         })
     }
-    async open(book) {
+    async open(book, options = {}) {
         if (typeof book === 'string'
         || typeof book.arrayBuffer === 'function'
-        || book.isDirectory) book = await makeBook(book)
+        || book.isDirectory) book = await makeBook(book, options)
         this.book = book
         this.language = languageInfo(book.metadata?.language)