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Inline the helper method in PDFLinkService.goToDestination

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We no longer need the helper method to *potentially* call itself once data is available, and can instead take full advantage of async/await by inlining the code.
This commit is contained in:
Jonas Jenwald 2024-04-24 21:39:10 +02:00
parent 3052e99f65
commit fa69d9a3bc
1 changed files with 35 additions and 47 deletions
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76
web/pdf_link_service.js
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@ -131,10 +131,31 @@ class PDFLinkService {
return this.pdfDocument ? this.pdfViewer.isInPresentationMode : false; return this.pdfDocument ? this.pdfViewer.isInPresentationMode : false;
} }
#goToDestinationHelper(rawDest, namedDest = null, explicitDest) { /**
* This method will, when available, also update the browser history.
*
* @param {string|Array} dest - The named, or explicit, PDF destination.
*/
async goToDestination(dest) {
if (!this.pdfDocument) {
return;
}
let namedDest, explicitDest, pageNumber;
if (typeof dest === "string") {
namedDest = dest;
explicitDest = await this.pdfDocument.getDestination(dest);
} else {
namedDest = null;
explicitDest = await dest;
}
if (!Array.isArray(explicitDest)) {
console.error(
`goToDestination: "${explicitDest}" is not a valid destination array, for dest="${dest}".`
);
return;
}
// Dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..> // Dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..>
const destRef = explicitDest[0]; const [destRef] = explicitDest;
let pageNumber;
if (typeof destRef === "object" && destRef !== null) { if (typeof destRef === "object" && destRef !== null) {
pageNumber = this._cachedPageNumber(destRef); pageNumber = this._cachedPageNumber(destRef);
@ -142,33 +163,27 @@ class PDFLinkService {
if (!pageNumber) { if (!pageNumber) {
// Fetch the page reference if it's not yet available. This could // Fetch the page reference if it's not yet available. This could
// only occur during loading, before all pages have been resolved. // only occur during loading, before all pages have been resolved.
this.pdfDocument try {
.getPageIndex(destRef) pageNumber = (await this.pdfDocument.getPageIndex(destRef)) + 1;
.then(pageIndex => { this.cachePageRef(pageNumber, destRef);
this.cachePageRef(pageIndex + 1, destRef); } catch {
this.#goToDestinationHelper(rawDest, namedDest, explicitDest);
})
.catch(() => {
console.error( console.error(
`PDFLinkService.#goToDestinationHelper: "${destRef}" is not ` + `goToDestination: "${destRef}" is not a valid page reference, for dest="${dest}".`
`a valid page reference, for dest="${rawDest}".`
); );
});
return; return;
} }
}
} else if (Number.isInteger(destRef)) { } else if (Number.isInteger(destRef)) {
pageNumber = destRef + 1; pageNumber = destRef + 1;
} else { } else {
console.error( console.error(
`PDFLinkService.#goToDestinationHelper: "${destRef}" is not ` + `goToDestination: "${destRef}" is not a valid destination reference, for dest="${dest}".`
`a valid destination reference, for dest="${rawDest}".`
); );
return; return;
} }
if (!pageNumber || pageNumber < 1 || pageNumber > this.pagesCount) { if (!pageNumber || pageNumber < 1 || pageNumber > this.pagesCount) {
console.error( console.error(
`PDFLinkService.#goToDestinationHelper: "${pageNumber}" is not ` + `goToDestination: "${pageNumber}" is not a valid page number, for dest="${dest}".`
`a valid page number, for dest="${rawDest}".`
); );
return; return;
} }
@ -187,33 +202,6 @@ class PDFLinkService {
}); });
} }
/**
* This method will, when available, also update the browser history.
*
* @param {string|Array} dest - The named, or explicit, PDF destination.
*/
async goToDestination(dest) {
if (!this.pdfDocument) {
return;
}
let namedDest, explicitDest;
if (typeof dest === "string") {
namedDest = dest;
explicitDest = await this.pdfDocument.getDestination(dest);
} else {
namedDest = null;
explicitDest = await dest;
}
if (!Array.isArray(explicitDest)) {
console.error(
`PDFLinkService.goToDestination: "${explicitDest}" is not ` +
`a valid destination array, for dest="${dest}".`
);
return;
}
this.#goToDestinationHelper(dest, namedDest, explicitDest);
}
/** /**
* This method will, when available, also update the browser history. * This method will, when available, also update the browser history.
* *