Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 198 insertions, 0 deletions

diff --git a/layout/style/FontPreloader.cpp b/layout/style/FontPreloader.cpp
new file mode 100644
index 0000000000..13ddad1841
--- /dev/null
+++ b/layout/style/FontPreloader.cpp
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "FontPreloader.h"
+
+#include "gfxUserFontSet.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/ReferrerInfo.h"
+#include "nsContentSecurityManager.h"
+#include "nsIClassOfService.h"
+#include "nsIHttpChannel.h"
+#include "nsISupportsPriority.h"
+#include "nsNetUtil.h"
+
+namespace mozilla {
+
+FontPreloader::FontPreloader()
+    : FetchPreloader(nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD) {}
+
+void FontPreloader::PrioritizeAsPreload() { PrioritizeAsPreload(Channel()); }
+
+nsresult FontPreloader::CreateChannel(
+    nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
+    const dom::ReferrerPolicy& aReferrerPolicy, dom::Document* aDocument,
+    nsILoadGroup* aLoadGroup, nsIInterfaceRequestor* aCallbacks,
+    uint64_t aEarlyHintPreloaderId) {
+  return BuildChannel(aChannel, aURI, aCORSMode, aReferrerPolicy, nullptr,
+                      nullptr, aDocument, aLoadGroup, aCallbacks, true);
+}
+
+// static
+void FontPreloader::PrioritizeAsPreload(nsIChannel* aChannel) {
+  nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
+  if (cos) {
+    cos->AddClassFlags(nsIClassOfService::Unblocked);
+  }
+}
+
+/* static */ void FontPreloader::BuildChannelFlags(
+    nsIURI* aURI, bool aIsPreload,
+    nsContentSecurityManager::CORSSecurityMapping& aCorsMapping,
+    nsSecurityFlags& aSecurityFlags, nsContentPolicyType& aContentPolicyType) {
+  // aCORSMode is ignored.  We always load as crossorigin=anonymous, but a
+  // preload started with anything other then "anonymous" will never be found.
+  aCorsMapping =
+      aURI->SchemeIs("file")
+          ? nsContentSecurityManager::CORSSecurityMapping::
+                CORS_NONE_MAPS_TO_INHERITED_CONTEXT
+          : nsContentSecurityManager::CORSSecurityMapping::REQUIRE_CORS_CHECKS;
+
+  aSecurityFlags = nsContentSecurityManager::ComputeSecurityFlags(
+      CORSMode::CORS_NONE, aCorsMapping);
+
+  aContentPolicyType = aIsPreload ? nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD
+                                  : nsIContentPolicy::TYPE_FONT;
+}
+
+/* static */ nsresult FontPreloader::BuildChannelSetup(
+    nsIChannel* aChannel, nsIHttpChannel* aHttpChannel,
+    nsIReferrerInfo* aReferrerInfo, const gfxFontFaceSrc* aFontFaceSrc) {
+  if (aHttpChannel) {
+    nsresult rv = aHttpChannel->SetRequestHeader(
+        "Accept"_ns,
+        "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8"_ns,
+        false);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (aReferrerInfo) {
+      rv = aHttpChannel->SetReferrerInfoWithoutClone(aReferrerInfo);
+      MOZ_ASSERT(NS_SUCCEEDED(rv));
+    } else {
+      MOZ_ASSERT(aFontFaceSrc);
+
+      rv = aHttpChannel->SetReferrerInfo(aFontFaceSrc->mReferrerInfo);
+      Unused << NS_WARN_IF(NS_FAILED(rv));
+
+      // For WOFF and WOFF2, we should tell servers/proxies/etc NOT to try
+      // and apply additional compression at the content-encoding layer
+      if (aFontFaceSrc->mFormatHint == StyleFontFaceSourceFormatKeyword::Woff ||
+          aFontFaceSrc->mFormatHint ==
+              StyleFontFaceSourceFormatKeyword::Woff2) {
+        rv = aHttpChannel->SetRequestHeader("Accept-Encoding"_ns, "identity"_ns,
+                                            false);
+        NS_ENSURE_SUCCESS(rv, rv);
+      }
+    }
+  }
+
+  nsCOMPtr<nsISupportsPriority> priorityChannel(do_QueryInterface(aChannel));
+  if (priorityChannel) {
+    priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGH);
+  }
+  nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
+  if (cos) {
+    cos->AddClassFlags(nsIClassOfService::TailForbidden);
+  }
+
+  return NS_OK;
+}
+
+// static
+nsresult FontPreloader::BuildChannel(
+    nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
+    const dom::ReferrerPolicy& aReferrerPolicy,
+    gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc,
+    dom::Document* aDocument, nsILoadGroup* aLoadGroup,
+    nsIInterfaceRequestor* aCallbacks, bool aIsPreload) {
+  nsresult rv;
+
+  nsIPrincipal* principal =
+      aUserFontEntry ? (aUserFontEntry->GetPrincipal()
+                            ? aUserFontEntry->GetPrincipal()->NodePrincipal()
+                            : nullptr)
+                     : aDocument->NodePrincipal();
+
+  nsContentSecurityManager::CORSSecurityMapping corsMapping;
+  nsSecurityFlags securityFlags;
+  nsContentPolicyType contentPolicyType;
+  BuildChannelFlags(aURI, aIsPreload, corsMapping, securityFlags,
+                    contentPolicyType);
+
+  nsCOMPtr<nsIChannel> channel;
+  // Note we are calling NS_NewChannelWithTriggeringPrincipal() with both a
+  // node and a principal.  This is because the document where the font is
+  // being loaded might have a different origin from the principal of the
+  // stylesheet that initiated the font load.
+  rv = NS_NewChannelWithTriggeringPrincipal(getter_AddRefs(channel), aURI,
+                                            aDocument, principal, securityFlags,
+                                            contentPolicyType,
+                                            nullptr,  // PerformanceStorage
+                                            aLoadGroup);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
+  nsCOMPtr<nsIReferrerInfo> referrerInfo;
+  if (httpChannel && !aFontFaceSrc) {
+    referrerInfo = new dom::ReferrerInfo(aDocument->GetDocumentURIAsReferrer(),
+                                         aReferrerPolicy);
+    rv = httpChannel->SetReferrerInfoWithoutClone(referrerInfo);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+
+  rv = BuildChannelSetup(channel, httpChannel, referrerInfo, aFontFaceSrc);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  channel.forget(aChannel);
+  return NS_OK;
+}
+
+// static
+nsresult FontPreloader::BuildChannel(
+    nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
+    const dom::ReferrerPolicy& aReferrerPolicy,
+    gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc,
+    dom::WorkerPrivate* aWorkerPrivate, nsILoadGroup* aLoadGroup,
+    nsIInterfaceRequestor* aCallbacks, bool aIsPreload) {
+  nsresult rv;
+
+  nsIPrincipal* principal =
+      aUserFontEntry ? (aUserFontEntry->GetPrincipal()
+                            ? aUserFontEntry->GetPrincipal()->NodePrincipal()
+                            : nullptr)
+                     : aWorkerPrivate->GetPrincipal();
+
+  nsContentSecurityManager::CORSSecurityMapping corsMapping;
+  nsSecurityFlags securityFlags;
+  nsContentPolicyType contentPolicyType;
+  BuildChannelFlags(aURI, aIsPreload, corsMapping, securityFlags,
+                    contentPolicyType);
+
+  nsCOMPtr<nsIChannel> channel;
+  rv = NS_NewChannelWithTriggeringPrincipal(
+      getter_AddRefs(channel), aURI, aWorkerPrivate->GetLoadingPrincipal(),
+      principal, securityFlags, contentPolicyType, nullptr, nullptr,
+      aLoadGroup);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
+
+  nsCOMPtr<nsIReferrerInfo> referrerInfo;
+  if (httpChannel && !aFontFaceSrc) {
+    referrerInfo =
+        static_cast<dom::ReferrerInfo*>(aWorkerPrivate->GetReferrerInfo())
+            ->CloneWithNewPolicy(aReferrerPolicy);
+  }
+
+  rv = BuildChannelSetup(channel, httpChannel, referrerInfo, aFontFaceSrc);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  channel.forget(aChannel);
+  return NS_OK;
+}
+
+}  // namespace mozilla