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[PDFHistory] Reduce unnecessary duplication, by introducing a helper-method for validating pageNumbers

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This commit is contained in:
Jonas Jenwald 2021-03-24 13:55:56 +01:00
parent 9d0ce6e79f
commit 685a60055e
1 changed files with 12 additions and 22 deletions
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34
web/pdf_history.js
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@ -205,13 +205,7 @@ class PDFHistory {
`"${explicitDest}" is not a valid explicitDest parameter.`
);
return;
} else if (
!(
Number.isInteger(pageNumber) &&
pageNumber > 0 &&
pageNumber <= this.linkService.pagesCount
)
) {
} else if (!this._isValidPage(pageNumber)) {
// Allow an unset `pageNumber` if and only if the history is still empty;
// please refer to the `this._destination.page = null;` comment above.
if (pageNumber !== null || this._destination) {
@ -281,13 +275,7 @@ class PDFHistory {
if (!this._initialized) {
return;
}
if (
!(
Number.isInteger(pageNumber) &&
pageNumber > 0 &&
pageNumber <= this.linkService.pagesCount
)
) {
if (!this._isValidPage(pageNumber)) {
console.error(
`PDFHistory.pushPage: "${pageNumber}" is not a valid page number.`
);
@ -479,6 +467,15 @@ class PDFHistory {
this._pushOrReplaceState(position, forceReplace);
}
/**
* @private
*/
_isValidPage(val) {
return (
Number.isInteger(val) && val > 0 && val <= this.linkService.pagesCount
);
}
/**
* @private
*/
@ -548,14 +545,7 @@ class PDFHistory {
const nameddest = params.nameddest || "";
let page = params.page | 0;
if (
!(
Number.isInteger(page) &&
page > 0 &&
page <= this.linkService.pagesCount
) ||
(checkNameddest && nameddest.length > 0)
) {
if (!this._isValidPage(page) || (checkNameddest && nameddest.length > 0)) {
page = null;
}
return { hash, page, rotation: this.linkService.rotation };