Calixte Denizet
8310e944a8
When PDF.js is disabled, use the embedded-PDF fallback for these loads; its button retry still uses normal PDF handling. Constrain the parent-side retry to embedded browsing contexts whose embedder has an unprivileged principal. Differential Revision: https://phabricator.services.mozilla.com/D320884
68 lines
2.2 KiB
JavaScript
68 lines
2.2 KiB
JavaScript
/* Copyright 2026 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const lazy = {};
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ChromeUtils.defineESModuleGetters(lazy, {
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E10SUtils: "resource://gre/modules/E10SUtils.sys.mjs",
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});
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const EMBEDDER_ELEMENTS = new Set(["embed", "frame", "iframe", "object"]);
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/**
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* Returns aFallback's embedding page if it uses a supported element and has a
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* content or null principal.
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*
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* Only the embedding process can set the element type and embedder window ID.
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*
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* @param {WindowGlobalParent} aFallback the actor's sending window.
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* @returns {WindowGlobalParent|null}
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*/
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function getEmbeddingPage(aFallback) {
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const { browsingContext } = aFallback;
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if (!EMBEDDER_ELEMENTS.has(browsingContext.embedderElementType)) {
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return null;
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}
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const embedder = browsingContext.embedderWindowGlobal;
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const principal = embedder?.documentPrincipal;
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return principal?.isContentPrincipal || principal?.isNullPrincipal
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? embedder
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: null;
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}
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/**
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* Reloads the sender's URI with its embedder's principal.
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*/
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export class PdfEmbedFallbackParent extends JSWindowActorParent {
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receiveMessage({ name, data }) {
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if (name !== "PdfEmbedFallback:OpenPdf") {
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return;
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}
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const fallback = this.manager;
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if (!fallback?.isCurrentGlobal) {
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// Ignore messages from a document that is no longer current.
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return;
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}
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const embedder = getEmbeddingPage(fallback);
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if (!embedder) {
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return;
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}
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// The converter keeps the PDF URI as the fallback document's URI.
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fallback.browsingContext.loadURI(fallback.documentURI, {
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triggeringPrincipal: embedder.documentPrincipal,
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referrerInfo: lazy.E10SUtils.deserializeReferrerInfo(data?.referrerInfo),
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});
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}
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}
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