forked from mirrors/gecko-dev
6779b66f01
They're bad, specially if they do vastly different thing in overloaded functions, like aUseSystemPrincipal and aIsPreload. :) Differential Revision: https://phabricator.services.mozilla.com/D40851 --HG-- extra : moz-landing-system : lando
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* a CSS style sheet returned from nsIStyleSheetService.preloadSheet */
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#include "PreloadedStyleSheet.h"
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#include "mozilla/css/Loader.h"
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#include "mozilla/dom/Promise.h"
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#include "nsICSSLoaderObserver.h"
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#include "nsLayoutUtils.h"
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namespace mozilla {
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PreloadedStyleSheet::PreloadedStyleSheet(nsIURI* aURI,
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css::SheetParsingMode aParsingMode)
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: mLoaded(false), mURI(aURI), mParsingMode(aParsingMode) {}
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PreloadedStyleSheet)
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NS_INTERFACE_MAP_ENTRY(nsIPreloadedStyleSheet)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(PreloadedStyleSheet)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(PreloadedStyleSheet)
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NS_IMPL_CYCLE_COLLECTION(PreloadedStyleSheet, mSheet)
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nsresult PreloadedStyleSheet::GetSheet(StyleSheet** aResult) {
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*aResult = nullptr;
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MOZ_DIAGNOSTIC_ASSERT(mLoaded);
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if (!mSheet) {
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RefPtr<css::Loader> loader = new css::Loader;
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auto result = loader->LoadSheetSync(mURI, mParsingMode,
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css::Loader::UseSystemPrincipal::Yes);
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if (result.isErr()) {
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return result.unwrapErr();
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}
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mSheet = result.unwrap();
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}
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*aResult = mSheet;
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return NS_OK;
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}
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nsresult PreloadedStyleSheet::Preload() {
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MOZ_DIAGNOSTIC_ASSERT(!mLoaded);
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mLoaded = true;
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StyleSheet* sheet;
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return GetSheet(&sheet);
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}
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NS_IMPL_ISUPPORTS(PreloadedStyleSheet::StylesheetPreloadObserver,
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nsICSSLoaderObserver)
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NS_IMETHODIMP
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PreloadedStyleSheet::StylesheetPreloadObserver::StyleSheetLoaded(
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StyleSheet* aSheet, bool aWasDeferred, nsresult aStatus) {
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MOZ_DIAGNOSTIC_ASSERT(!mPreloadedSheet->mLoaded);
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mPreloadedSheet->mLoaded = true;
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if (NS_FAILED(aStatus)) {
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mPromise->MaybeReject(aStatus);
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} else {
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mPromise->MaybeResolve(mPreloadedSheet);
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}
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return NS_OK;
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}
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// Note: After calling this method, the preloaded sheet *must not* be used
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// until the observer is notified that the sheet has finished loading.
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nsresult PreloadedStyleSheet::PreloadAsync(NotNull<dom::Promise*> aPromise) {
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MOZ_DIAGNOSTIC_ASSERT(!mLoaded);
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RefPtr<css::Loader> loader = new css::Loader;
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RefPtr<StylesheetPreloadObserver> obs =
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new StylesheetPreloadObserver(aPromise, this);
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auto result = loader->LoadSheet(mURI, mParsingMode,
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css::Loader::UseSystemPrincipal::No, obs);
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if (result.isErr()) {
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return result.unwrapErr();
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}
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mSheet = result.unwrap();
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return NS_OK;
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}
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} // namespace mozilla
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