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Update PDFDocument._getLinearizationPage to do the /Type-check correctly (PR 14400 follow-up)

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I forgot about this in PR 14400, since we should obviously be consistent *and* given that the existing check is actually wrong; sorry about this!
This commit is contained in:
Jonas Jenwald 2021-12-29 13:13:42 +01:00
parent b99927e1ee
commit a20393e6e4
1 changed files with 13 additions and 10 deletions
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23
src/core/document.js
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@ -1264,7 +1264,7 @@ class PDFDocument {
}
async _getLinearizationPage(pageIndex) {
const { catalog, linearization } = this;
const { catalog, linearization, xref } = this;
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("!PRODUCTION || TESTING")
@ -1277,22 +1277,25 @@ class PDFDocument {
const ref = Ref.get(linearization.objectNumberFirst, 0);
try {
const obj = await this.xref.fetchAsync(ref);
const obj = await xref.fetchAsync(ref);
// Ensure that the object that was found is actually a Page dictionary.
if (
isDict(obj, "Page") ||
(isDict(obj) && !obj.has("Type") && obj.has("Contents"))
) {
if (ref && !catalog.pageKidsCountCache.has(ref)) {
catalog.pageKidsCountCache.put(ref, 1); // Cache the Page reference.
if (obj instanceof Dict) {
let type = obj.getRaw("Type");
if (type instanceof Ref) {
type = await xref.fetchAsync(type);
}
if (isName(type, "Page") || (!obj.has("Type") && !obj.has("Kids"))) {
if (ref && !catalog.pageKidsCountCache.has(ref)) {
catalog.pageKidsCountCache.put(ref, 1); // Cache the Page reference.
}
return [obj, ref];
}
return [obj, ref];
}
throw new FormatError(
"The Linearization dictionary doesn't point to a valid Page dictionary."
);
} catch (reason) {
info(reason);
warn(`_getLinearizationPage: "${reason.message}".`);
return catalog.getPageDict(pageIndex);
}
}