зеркало из https://github.com/mozilla/gecko-dev.git
1494 строки
47 KiB
C++
1494 строки
47 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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#include "mozilla/StyleSheet.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/BasePrincipal.h"
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#include "mozilla/ComputedStyleInlines.h"
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#include "mozilla/css/ErrorReporter.h"
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#include "mozilla/css/GroupRule.h"
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#include "mozilla/dom/CSSImportRule.h"
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#include "mozilla/dom/CSSRuleList.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/MediaList.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/dom/ShadowRootBinding.h"
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#include "mozilla/NullPrincipal.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/ServoCSSRuleList.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/StaticPrefs_layout.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/css/SheetLoadData.h"
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#include "mozAutoDocUpdate.h"
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#include "SheetLoadData.h"
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namespace mozilla {
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using namespace dom;
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StyleSheet::StyleSheet(css::SheetParsingMode aParsingMode, CORSMode aCORSMode,
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const dom::SRIMetadata& aIntegrity)
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: mParentSheet(nullptr),
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mRelevantGlobal(nullptr),
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mConstructorDocument(nullptr),
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mDocumentOrShadowRoot(nullptr),
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mOwningNode(nullptr),
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mOwnerRule(nullptr),
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mParsingMode(aParsingMode),
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mState(static_cast<State>(0)),
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mInner(new StyleSheetInfo(aCORSMode, aIntegrity, aParsingMode)) {
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mInner->AddSheet(this);
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}
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StyleSheet::StyleSheet(const StyleSheet& aCopy, StyleSheet* aParentSheetToUse,
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dom::CSSImportRule* aOwnerRuleToUse,
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dom::DocumentOrShadowRoot* aDocOrShadowRootToUse,
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dom::Document* aConstructorDocToUse,
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nsINode* aOwningNodeToUse)
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: mParentSheet(aParentSheetToUse),
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mRelevantGlobal(nullptr),
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mConstructorDocument(aConstructorDocToUse),
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mTitle(aCopy.mTitle),
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mDocumentOrShadowRoot(aDocOrShadowRootToUse),
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mOwningNode(aOwningNodeToUse),
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mOwnerRule(aOwnerRuleToUse),
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mParsingMode(aCopy.mParsingMode),
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mState(aCopy.mState),
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// Shallow copy, but concrete subclasses will fix up.
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mInner(aCopy.mInner) {
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MOZ_ASSERT(!aConstructorDocToUse || aCopy.IsConstructed());
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MOZ_ASSERT(!aConstructorDocToUse || !aDocOrShadowRootToUse,
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"Should never have both of these together.");
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MOZ_ASSERT(mInner, "Should only copy StyleSheets with an mInner.");
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mInner->AddSheet(this);
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// CSSOM's been there, force full copy now.
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if (HasForcedUniqueInner()) {
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MOZ_ASSERT(IsComplete(),
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"Why have rules been accessed on an incomplete sheet?");
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EnsureUniqueInner();
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// But CSSOM hasn't been on _this_ stylesheet yet, so no need to clone
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// ourselves.
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mState &= ~(State::ForcedUniqueInner | State::ModifiedRules |
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State::ModifiedRulesForDevtools);
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}
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if (aCopy.mMedia) {
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// XXX This is wrong; we should be keeping @import rules and
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// sheets in sync!
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mMedia = aCopy.mMedia->Clone();
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}
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}
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/* static */
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// https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-cssstylesheet
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already_AddRefed<StyleSheet> StyleSheet::Constructor(
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const dom::GlobalObject& aGlobal, const dom::CSSStyleSheetInit& aOptions,
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ErrorResult& aRv) {
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nsCOMPtr<nsPIDOMWindowInner> window =
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do_QueryInterface(aGlobal.GetAsSupports());
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if (!window) {
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aRv.ThrowNotSupportedError("Not supported when there is no document");
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return nullptr;
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}
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Document* constructorDocument = window->GetExtantDoc();
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if (!constructorDocument) {
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aRv.ThrowNotSupportedError("Not supported when there is no document");
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return nullptr;
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}
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// 1. Construct a sheet and set its properties (see spec).
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auto sheet =
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MakeRefPtr<StyleSheet>(css::SheetParsingMode::eAuthorSheetFeatures,
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CORSMode::CORS_NONE, dom::SRIMetadata());
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// baseURL not yet in the spec. Implemented based on the following discussion:
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// https://github.com/WICG/construct-stylesheets/issues/95#issuecomment-594217180
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RefPtr<nsIURI> baseURI;
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if (!aOptions.mBaseURL.WasPassed()) {
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baseURI = constructorDocument->GetBaseURI();
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} else {
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nsresult rv = NS_NewURI(getter_AddRefs(baseURI), aOptions.mBaseURL.Value(),
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nullptr, constructorDocument->GetBaseURI());
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if (NS_FAILED(rv)) {
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aRv.ThrowNotAllowedError(
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"Constructed style sheets must have a valid base URL");
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return nullptr;
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}
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}
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nsIURI* sheetURI = constructorDocument->GetDocumentURI();
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nsIURI* originalURI = nullptr;
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sheet->SetURIs(sheetURI, originalURI, baseURI);
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sheet->SetPrincipal(constructorDocument->NodePrincipal());
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sheet->SetReferrerInfo(constructorDocument->GetReferrerInfo());
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sheet->mConstructorDocument = constructorDocument;
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if (constructorDocument) {
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sheet->mRelevantGlobal = constructorDocument->GetParentObject();
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}
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// 2. Set the sheet's media according to aOptions.
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if (aOptions.mMedia.IsUTF8String()) {
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sheet->SetMedia(MediaList::Create(aOptions.mMedia.GetAsUTF8String()));
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} else {
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sheet->SetMedia(aOptions.mMedia.GetAsMediaList()->Clone());
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}
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// 3. Set the sheet's disabled flag according to aOptions.
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sheet->SetDisabled(aOptions.mDisabled);
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sheet->SetComplete();
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// 4. Return sheet.
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return sheet.forget();
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}
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StyleSheet::~StyleSheet() {
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MOZ_ASSERT(!mInner, "Inner should have been dropped in LastRelease");
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}
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bool StyleSheet::HasRules() const {
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return Servo_StyleSheet_HasRules(Inner().mContents);
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}
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Document* StyleSheet::GetAssociatedDocument() const {
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auto* associated = GetAssociatedDocumentOrShadowRoot();
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return associated ? associated->AsNode().OwnerDoc() : nullptr;
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}
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dom::DocumentOrShadowRoot* StyleSheet::GetAssociatedDocumentOrShadowRoot()
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const {
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const StyleSheet& outer = OutermostSheet();
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if (outer.mDocumentOrShadowRoot) {
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return outer.mDocumentOrShadowRoot;
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}
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if (outer.IsConstructed()) {
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return outer.mConstructorDocument;
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}
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return nullptr;
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}
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Document* StyleSheet::GetKeptAliveByDocument() const {
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const StyleSheet& outer = OutermostSheet();
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if (outer.mDocumentOrShadowRoot) {
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return outer.mDocumentOrShadowRoot->AsNode().GetComposedDoc();
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}
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if (outer.IsConstructed()) {
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for (DocumentOrShadowRoot* adopter : outer.mAdopters) {
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MOZ_ASSERT(adopter->AsNode().OwnerDoc() == outer.mConstructorDocument);
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if (adopter->AsNode().IsInComposedDoc()) {
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return outer.mConstructorDocument.get();
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}
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}
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}
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return nullptr;
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}
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void StyleSheet::LastRelease() {
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MOZ_ASSERT(mInner, "Should have an mInner at time of destruction.");
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MOZ_ASSERT(mInner->mSheets.Contains(this), "Our mInner should include us.");
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MOZ_DIAGNOSTIC_ASSERT(mAdopters.IsEmpty(),
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"Should have no adopters at time of destruction.");
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mInner->RemoveSheet(this);
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mInner = nullptr;
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DropMedia();
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DropRuleList();
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}
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void StyleSheet::UnlinkInner() {
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// We can only have a cycle through our inner if we have a unique inner,
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// because otherwise there are no JS wrappers for anything in the inner.
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if (mInner->mSheets.Length() != 1) {
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return;
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}
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for (StyleSheet* child : ChildSheets()) {
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MOZ_ASSERT(child->mParentSheet == this, "We have a unique inner!");
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child->mParentSheet = nullptr;
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}
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Inner().mChildren.Clear();
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}
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void StyleSheet::TraverseInner(nsCycleCollectionTraversalCallback& cb) {
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// We can only have a cycle through our inner if we have a unique inner,
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// because otherwise there are no JS wrappers for anything in the inner.
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if (mInner->mSheets.Length() != 1) {
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return;
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}
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for (StyleSheet* child : ChildSheets()) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "child sheet");
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cb.NoteXPCOMChild(child);
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}
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}
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// QueryInterface implementation for StyleSheet
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(StyleSheet)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsICSSLoaderObserver)
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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(StyleSheet)
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// We want to disconnect from our inner as soon as our refcount drops to zero,
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// without waiting for async deletion by the cycle collector. Otherwise we
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// might end up cloning the inner if someone mutates another sheet that shares
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// it with us, even though there is only one such sheet and we're about to go
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// away. This situation arises easily with sheet preloading.
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(StyleSheet, LastRelease())
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NS_IMPL_CYCLE_COLLECTION_CLASS(StyleSheet)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(StyleSheet)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMedia)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRuleList)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelevantGlobal)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConstructorDocument)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReplacePromise)
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tmp->TraverseInner(cb);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(StyleSheet)
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tmp->DropMedia();
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tmp->UnlinkInner();
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tmp->DropRuleList();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelevantGlobal)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mConstructorDocument)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mReplacePromise)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(StyleSheet)
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dom::CSSStyleSheetParsingMode StyleSheet::ParsingModeDOM() {
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#define CHECK_MODE(X, Y) \
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static_assert( \
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static_cast<int>(X) == static_cast<int>(Y), \
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"mozilla::dom::CSSStyleSheetParsingMode and " \
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"mozilla::css::SheetParsingMode should have identical values");
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CHECK_MODE(dom::CSSStyleSheetParsingMode::Agent, css::eAgentSheetFeatures);
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CHECK_MODE(dom::CSSStyleSheetParsingMode::User, css::eUserSheetFeatures);
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CHECK_MODE(dom::CSSStyleSheetParsingMode::Author, css::eAuthorSheetFeatures);
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#undef CHECK_MODE
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return static_cast<dom::CSSStyleSheetParsingMode>(mParsingMode);
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}
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void StyleSheet::SetComplete() {
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// HasForcedUniqueInner() is okay if the sheet is constructed, because
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// constructed sheets are always unique and they may be set to complete
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// multiple times if their rules are replaced via Replace()
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MOZ_ASSERT(IsConstructed() || !HasForcedUniqueInner(),
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"Can't complete a sheet that's already been forced unique.");
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MOZ_ASSERT(!IsComplete(), "Already complete?");
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mState |= State::Complete;
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if (!Disabled()) {
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ApplicableStateChanged(true);
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}
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MaybeResolveReplacePromise();
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}
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void StyleSheet::ApplicableStateChanged(bool aApplicable) {
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MOZ_ASSERT(aApplicable == IsApplicable());
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auto Notify = [this](DocumentOrShadowRoot& target) {
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nsINode& node = target.AsNode();
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if (ShadowRoot* shadow = ShadowRoot::FromNode(node)) {
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shadow->StyleSheetApplicableStateChanged(*this);
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} else {
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node.AsDocument()->StyleSheetApplicableStateChanged(*this);
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}
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};
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const StyleSheet& sheet = OutermostSheet();
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if (sheet.mDocumentOrShadowRoot) {
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Notify(*sheet.mDocumentOrShadowRoot);
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}
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for (DocumentOrShadowRoot* adopter : sheet.mAdopters) {
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MOZ_ASSERT(adopter, "adopters should never be null");
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Notify(*adopter);
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}
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}
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void StyleSheet::SetDisabled(bool aDisabled) {
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if (IsReadOnly()) {
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return;
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}
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if (aDisabled == Disabled()) {
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return;
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}
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if (aDisabled) {
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mState |= State::Disabled;
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} else {
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mState &= ~State::Disabled;
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}
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if (IsComplete()) {
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ApplicableStateChanged(!aDisabled);
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}
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}
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void StyleSheet::SetURLExtraData() {
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Inner().mURLData =
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new URLExtraData(GetBaseURI(), GetReferrerInfo(), Principal());
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}
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nsISupports* StyleSheet::GetRelevantGlobal() const {
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const StyleSheet& outer = OutermostSheet();
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return outer.mRelevantGlobal;
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}
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StyleSheetInfo::StyleSheetInfo(CORSMode aCORSMode,
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const SRIMetadata& aIntegrity,
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css::SheetParsingMode aParsingMode)
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: mPrincipal(NullPrincipal::CreateWithoutOriginAttributes()),
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mCORSMode(aCORSMode),
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mReferrerInfo(new ReferrerInfo(nullptr)),
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mIntegrity(aIntegrity),
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mContents(Servo_StyleSheet_Empty(aParsingMode).Consume()),
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mURLData(URLExtraData::Dummy())
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#ifdef DEBUG
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,
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mPrincipalSet(false)
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#endif
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{
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if (!mPrincipal) {
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MOZ_CRASH("NullPrincipal::Init failed");
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}
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MOZ_COUNT_CTOR(StyleSheetInfo);
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}
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StyleSheetInfo::StyleSheetInfo(StyleSheetInfo& aCopy, StyleSheet* aPrimarySheet)
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: mSheetURI(aCopy.mSheetURI),
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mOriginalSheetURI(aCopy.mOriginalSheetURI),
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mBaseURI(aCopy.mBaseURI),
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mPrincipal(aCopy.mPrincipal),
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mCORSMode(aCopy.mCORSMode),
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mReferrerInfo(aCopy.mReferrerInfo),
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mIntegrity(aCopy.mIntegrity),
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// We don't rebuild the child because we're making a copy without
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// children.
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mSourceMapURL(aCopy.mSourceMapURL),
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mSourceMapURLFromComment(aCopy.mSourceMapURLFromComment),
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mSourceURL(aCopy.mSourceURL),
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mContents(Servo_StyleSheet_Clone(aCopy.mContents.get(), aPrimarySheet)
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.Consume()),
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mURLData(aCopy.mURLData)
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#ifdef DEBUG
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,
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mPrincipalSet(aCopy.mPrincipalSet)
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#endif
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{
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AddSheet(aPrimarySheet);
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// Our child list is fixed up by our parent.
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MOZ_COUNT_CTOR(StyleSheetInfo);
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}
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StyleSheetInfo::~StyleSheetInfo() { MOZ_COUNT_DTOR(StyleSheetInfo); }
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StyleSheetInfo* StyleSheetInfo::CloneFor(StyleSheet* aPrimarySheet) {
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return new StyleSheetInfo(*this, aPrimarySheet);
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}
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MOZ_DEFINE_MALLOC_SIZE_OF(ServoStyleSheetMallocSizeOf)
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MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoStyleSheetMallocEnclosingSizeOf)
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size_t StyleSheetInfo::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
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size_t n = aMallocSizeOf(this);
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n += Servo_StyleSheet_SizeOfIncludingThis(
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ServoStyleSheetMallocSizeOf, ServoStyleSheetMallocEnclosingSizeOf,
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mContents);
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return n;
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}
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void StyleSheetInfo::AddSheet(StyleSheet* aSheet) {
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mSheets.AppendElement(aSheet);
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}
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void StyleSheetInfo::RemoveSheet(StyleSheet* aSheet) {
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// Fix up the parent pointer in children lists.
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StyleSheet* newParent =
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aSheet == mSheets[0] ? mSheets.SafeElementAt(1) : mSheets[0];
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for (StyleSheet* child : mChildren) {
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MOZ_ASSERT(child->mParentSheet);
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MOZ_ASSERT(child->mParentSheet->mInner == this);
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if (child->mParentSheet == aSheet) {
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child->mParentSheet = newParent;
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}
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}
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if (1 == mSheets.Length()) {
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NS_ASSERTION(aSheet == mSheets.ElementAt(0), "bad parent");
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delete this;
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return;
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}
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mSheets.RemoveElement(aSheet);
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}
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void StyleSheet::GetType(nsAString& aType) { aType.AssignLiteral("text/css"); }
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void StyleSheet::GetHref(nsAString& aHref, ErrorResult& aRv) {
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if (nsIURI* sheetURI = Inner().mOriginalSheetURI) {
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nsAutoCString str;
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nsresult rv = sheetURI->GetSpec(str);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return;
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}
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CopyUTF8toUTF16(str, aHref);
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} else {
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SetDOMStringToNull(aHref);
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}
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}
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void StyleSheet::GetTitle(nsAString& aTitle) {
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// From https://drafts.csswg.org/cssom/#dom-stylesheet-title:
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//
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// The title attribute must return the title or null if title is the empty
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// string.
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//
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if (!mTitle.IsEmpty()) {
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aTitle.Assign(mTitle);
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} else {
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SetDOMStringToNull(aTitle);
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}
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}
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void StyleSheet::WillDirty() {
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MOZ_ASSERT(!IsReadOnly());
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if (IsComplete()) {
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EnsureUniqueInner();
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}
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}
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void StyleSheet::AddStyleSet(ServoStyleSet* aStyleSet) {
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MOZ_DIAGNOSTIC_ASSERT(!mStyleSets.Contains(aStyleSet),
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"style set already registered");
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mStyleSets.AppendElement(aStyleSet);
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}
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void StyleSheet::DropStyleSet(ServoStyleSet* aStyleSet) {
|
|
bool found = mStyleSets.RemoveElement(aStyleSet);
|
|
MOZ_DIAGNOSTIC_ASSERT(found, "didn't find style set");
|
|
#ifndef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
Unused << found;
|
|
#endif
|
|
}
|
|
|
|
// NOTE(emilio): Composed doc and containing shadow root are set in child sheets
|
|
// too, so no need to do it for each ancestor.
|
|
#define NOTIFY(function_, args_) \
|
|
do { \
|
|
StyleSheet* current = this; \
|
|
do { \
|
|
for (ServoStyleSet * set : current->mStyleSets) { \
|
|
set->function_ args_; \
|
|
} \
|
|
if (auto* docOrShadow = current->mDocumentOrShadowRoot) { \
|
|
if (auto* shadow = ShadowRoot::FromNode(docOrShadow->AsNode())) { \
|
|
shadow->function_ args_; \
|
|
} else { \
|
|
docOrShadow->AsNode().AsDocument()->function_ args_; \
|
|
} \
|
|
} \
|
|
for (auto* adopter : mAdopters) { \
|
|
if (auto* shadow = ShadowRoot::FromNode(adopter->AsNode())) { \
|
|
shadow->function_ args_; \
|
|
} else { \
|
|
adopter->AsNode().AsDocument()->function_ args_; \
|
|
} \
|
|
} \
|
|
current = current->mParentSheet; \
|
|
} while (current); \
|
|
} while (0)
|
|
|
|
void StyleSheet::EnsureUniqueInner() {
|
|
MOZ_ASSERT(mInner->mSheets.Length() != 0, "unexpected number of outers");
|
|
|
|
if (IsReadOnly()) {
|
|
// Sheets that can't be modified don't need a unique inner.
|
|
return;
|
|
}
|
|
|
|
mState |= State::ForcedUniqueInner;
|
|
|
|
if (HasUniqueInner()) {
|
|
// already unique
|
|
return;
|
|
}
|
|
|
|
StyleSheetInfo* clone = mInner->CloneFor(this);
|
|
MOZ_ASSERT(clone);
|
|
mInner->RemoveSheet(this);
|
|
mInner = clone;
|
|
|
|
// Fixup the child lists and parent links in the Servo sheet. This is done
|
|
// here instead of in StyleSheetInner::CloneFor, because it's just more
|
|
// convenient to do so instead.
|
|
BuildChildListAfterInnerClone();
|
|
|
|
// let our containing style sets know that if we call
|
|
// nsPresContext::EnsureSafeToHandOutCSSRules we will need to restyle the
|
|
// document
|
|
NOTIFY(SheetCloned, (*this));
|
|
}
|
|
|
|
// WebIDL CSSStyleSheet API
|
|
|
|
dom::CSSRuleList* StyleSheet::GetCssRules(nsIPrincipal& aSubjectPrincipal,
|
|
ErrorResult& aRv) {
|
|
if (!AreRulesAvailable(aSubjectPrincipal, aRv)) {
|
|
return nullptr;
|
|
}
|
|
return GetCssRulesInternal();
|
|
}
|
|
|
|
void StyleSheet::GetSourceMapURL(nsAString& aSourceMapURL) {
|
|
if (mInner->mSourceMapURL.IsEmpty()) {
|
|
aSourceMapURL = mInner->mSourceMapURLFromComment;
|
|
} else {
|
|
aSourceMapURL = mInner->mSourceMapURL;
|
|
}
|
|
}
|
|
|
|
void StyleSheet::SetSourceMapURL(const nsAString& aSourceMapURL) {
|
|
mInner->mSourceMapURL = aSourceMapURL;
|
|
}
|
|
|
|
void StyleSheet::SetSourceMapURLFromComment(
|
|
const nsAString& aSourceMapURLFromComment) {
|
|
mInner->mSourceMapURLFromComment = aSourceMapURLFromComment;
|
|
}
|
|
|
|
void StyleSheet::GetSourceURL(nsAString& aSourceURL) {
|
|
aSourceURL = mInner->mSourceURL;
|
|
}
|
|
|
|
void StyleSheet::SetSourceURL(const nsAString& aSourceURL) {
|
|
mInner->mSourceURL = aSourceURL;
|
|
}
|
|
|
|
css::Rule* StyleSheet::GetDOMOwnerRule() const { return mOwnerRule; }
|
|
|
|
// https://drafts.csswg.org/cssom/#dom-cssstylesheet-insertrule
|
|
// https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-insertrule
|
|
uint32_t StyleSheet::InsertRule(const nsACString& aRule, uint32_t aIndex,
|
|
nsIPrincipal& aSubjectPrincipal,
|
|
ErrorResult& aRv) {
|
|
if (IsReadOnly() || !AreRulesAvailable(aSubjectPrincipal, aRv)) {
|
|
return 0;
|
|
}
|
|
|
|
if (ModificationDisallowed()) {
|
|
aRv.ThrowNotAllowedError(
|
|
"This method can only be called on "
|
|
"modifiable style sheets");
|
|
return 0;
|
|
}
|
|
|
|
return InsertRuleInternal(aRule, aIndex, aRv);
|
|
}
|
|
|
|
// https://drafts.csswg.org/cssom/#dom-cssstylesheet-deleterule
|
|
// https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-deleterule
|
|
void StyleSheet::DeleteRule(uint32_t aIndex, nsIPrincipal& aSubjectPrincipal,
|
|
ErrorResult& aRv) {
|
|
if (IsReadOnly() || !AreRulesAvailable(aSubjectPrincipal, aRv)) {
|
|
return;
|
|
}
|
|
|
|
if (ModificationDisallowed()) {
|
|
return aRv.ThrowNotAllowedError(
|
|
"This method can only be called on "
|
|
"modifiable style sheets");
|
|
}
|
|
|
|
return DeleteRuleInternal(aIndex, aRv);
|
|
}
|
|
|
|
int32_t StyleSheet::AddRule(const nsACString& aSelector,
|
|
const nsACString& aBlock,
|
|
const Optional<uint32_t>& aIndex,
|
|
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
|
|
if (IsReadOnly() || !AreRulesAvailable(aSubjectPrincipal, aRv)) {
|
|
return -1;
|
|
}
|
|
|
|
nsAutoCString rule;
|
|
rule.Append(aSelector);
|
|
rule.AppendLiteral(" { ");
|
|
if (!aBlock.IsEmpty()) {
|
|
rule.Append(aBlock);
|
|
rule.Append(' ');
|
|
}
|
|
rule.Append('}');
|
|
|
|
auto index =
|
|
aIndex.WasPassed() ? aIndex.Value() : GetCssRulesInternal()->Length();
|
|
|
|
InsertRuleInternal(rule, index, aRv);
|
|
// Always return -1.
|
|
return -1;
|
|
}
|
|
|
|
void StyleSheet::MaybeResolveReplacePromise() {
|
|
MOZ_ASSERT(!!mReplacePromise == ModificationDisallowed());
|
|
if (!mReplacePromise) {
|
|
return;
|
|
}
|
|
|
|
SetModificationDisallowed(false);
|
|
mReplacePromise->MaybeResolve(this);
|
|
mReplacePromise = nullptr;
|
|
}
|
|
|
|
void StyleSheet::MaybeRejectReplacePromise() {
|
|
MOZ_ASSERT(!!mReplacePromise == ModificationDisallowed());
|
|
if (!mReplacePromise) {
|
|
return;
|
|
}
|
|
|
|
SetModificationDisallowed(false);
|
|
mReplacePromise->MaybeRejectWithNetworkError(
|
|
"@import style sheet load failed");
|
|
mReplacePromise = nullptr;
|
|
}
|
|
|
|
// https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-replace
|
|
already_AddRefed<dom::Promise> StyleSheet::Replace(const nsACString& aText,
|
|
ErrorResult& aRv) {
|
|
nsIGlobalObject* globalObject = nullptr;
|
|
const StyleSheet& outer = OutermostSheet();
|
|
if (outer.mRelevantGlobal) {
|
|
globalObject = outer.mRelevantGlobal;
|
|
} else if (Document* doc = outer.GetAssociatedDocument()) {
|
|
globalObject = doc->GetScopeObject();
|
|
}
|
|
|
|
RefPtr<dom::Promise> promise = dom::Promise::Create(globalObject, aRv);
|
|
if (!promise) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Step 1 and 4 are variable declarations
|
|
|
|
// 2.1 Check if sheet is constructed, else reject promise.
|
|
if (!IsConstructed()) {
|
|
promise->MaybeRejectWithNotAllowedError(
|
|
"This method can only be called on "
|
|
"constructed style sheets");
|
|
return promise.forget();
|
|
}
|
|
|
|
// 2.2 Check if sheet is modifiable, else throw.
|
|
if (ModificationDisallowed()) {
|
|
promise->MaybeRejectWithNotAllowedError(
|
|
"This method can only be called on "
|
|
"modifiable style sheets");
|
|
return promise.forget();
|
|
}
|
|
|
|
// 3. Disallow modifications until finished.
|
|
SetModificationDisallowed(true);
|
|
|
|
// TODO(emilio, 1642227): Should constructable stylesheets notify global
|
|
// observers (i.e., set mMustNotify to true)?
|
|
auto* loader = mConstructorDocument->CSSLoader();
|
|
auto loadData = MakeRefPtr<css::SheetLoadData>(
|
|
loader, nullptr, this, /* aSyncLoad */ false,
|
|
css::Loader::UseSystemPrincipal::No, css::StylePreloadKind::None,
|
|
/* aPreloadEncoding */ nullptr,
|
|
/* aObserver */ nullptr, mConstructorDocument->NodePrincipal(),
|
|
GetReferrerInfo(),
|
|
/* aRequestingNode */ nullptr);
|
|
|
|
// In parallel
|
|
// 5.1 Parse aText into rules.
|
|
// 5.2 Load import rules, throw NetworkError if failed.
|
|
// 5.3 Set sheet's rules to new rules.
|
|
nsCOMPtr<nsISerialEventTarget> target =
|
|
mConstructorDocument->EventTargetFor(TaskCategory::Other);
|
|
loadData->mIsBeingParsed = true;
|
|
MOZ_ASSERT(!mReplacePromise);
|
|
mReplacePromise = promise;
|
|
ParseSheet(*loader, aText, *loadData)
|
|
->Then(
|
|
target, __func__,
|
|
[loadData] { loadData->SheetFinishedParsingAsync(); },
|
|
[] { MOZ_CRASH("This MozPromise should never be rejected."); });
|
|
|
|
// 6. Return the promise
|
|
return promise.forget();
|
|
}
|
|
|
|
// https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-replacesync
|
|
void StyleSheet::ReplaceSync(const nsACString& aText, ErrorResult& aRv) {
|
|
// Step 1 is a variable declaration
|
|
|
|
// 2.1 Check if sheet is constructed, else throw.
|
|
if (!IsConstructed()) {
|
|
return aRv.ThrowNotAllowedError(
|
|
"Can only be called on constructed style sheets");
|
|
}
|
|
|
|
// 2.2 Check if sheet is modifiable, else throw.
|
|
if (ModificationDisallowed()) {
|
|
return aRv.ThrowNotAllowedError(
|
|
"Can only be called on modifiable style sheets");
|
|
}
|
|
|
|
// 3. Parse aText into rules.
|
|
// 4. If rules contain @imports, skip them and continue parsing.
|
|
auto* loader = mConstructorDocument->CSSLoader();
|
|
SetURLExtraData();
|
|
RefPtr<const RawServoStyleSheetContents> rawContent =
|
|
Servo_StyleSheet_FromUTF8Bytes(
|
|
loader, this,
|
|
/* load_data = */ nullptr, &aText, mParsingMode, Inner().mURLData,
|
|
/* line_number_offset = */ 0,
|
|
mConstructorDocument->GetCompatibilityMode(),
|
|
/* reusable_sheets = */ nullptr,
|
|
mConstructorDocument->GetStyleUseCounters(),
|
|
StyleAllowImportRules::No, StyleSanitizationKind::None,
|
|
/* sanitized_output = */ nullptr)
|
|
.Consume();
|
|
|
|
// 5. Set sheet's rules to the new rules.
|
|
DropRuleList();
|
|
Inner().mContents = std::move(rawContent);
|
|
FinishParse();
|
|
RuleChanged(nullptr, StyleRuleChangeKind::Generic);
|
|
}
|
|
|
|
nsresult StyleSheet::DeleteRuleFromGroup(css::GroupRule* aGroup,
|
|
uint32_t aIndex) {
|
|
NS_ENSURE_ARG_POINTER(aGroup);
|
|
NS_ASSERTION(IsComplete(), "No deleting from an incomplete sheet!");
|
|
RefPtr<css::Rule> rule = aGroup->GetStyleRuleAt(aIndex);
|
|
NS_ENSURE_TRUE(rule, NS_ERROR_ILLEGAL_VALUE);
|
|
|
|
// check that the rule actually belongs to this sheet!
|
|
if (this != rule->GetStyleSheet()) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
if (IsReadOnly()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
WillDirty();
|
|
|
|
nsresult result = aGroup->DeleteStyleRuleAt(aIndex);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
|
|
rule->DropReferences();
|
|
|
|
RuleRemoved(*rule);
|
|
return NS_OK;
|
|
}
|
|
|
|
void StyleSheet::RuleAdded(css::Rule& aRule) {
|
|
SetModifiedRules();
|
|
NOTIFY(RuleAdded, (*this, aRule));
|
|
}
|
|
|
|
void StyleSheet::RuleRemoved(css::Rule& aRule) {
|
|
SetModifiedRules();
|
|
NOTIFY(RuleRemoved, (*this, aRule));
|
|
}
|
|
|
|
void StyleSheet::RuleChanged(css::Rule* aRule, StyleRuleChangeKind aKind) {
|
|
SetModifiedRules();
|
|
NOTIFY(RuleChanged, (*this, aRule, aKind));
|
|
}
|
|
|
|
// nsICSSLoaderObserver implementation
|
|
NS_IMETHODIMP
|
|
StyleSheet::StyleSheetLoaded(StyleSheet* aSheet, bool aWasDeferred,
|
|
nsresult aStatus) {
|
|
if (!aSheet->GetParentSheet()) {
|
|
return NS_OK; // ignore if sheet has been detached already
|
|
}
|
|
MOZ_ASSERT(this == aSheet->GetParentSheet(),
|
|
"We are being notified of a sheet load for a sheet that is not "
|
|
"our child!");
|
|
if (NS_FAILED(aStatus)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_ASSERT(aSheet->GetOwnerRule());
|
|
NOTIFY(ImportRuleLoaded, (*aSheet->GetOwnerRule(), *aSheet));
|
|
return NS_OK;
|
|
}
|
|
|
|
#undef NOTIFY
|
|
|
|
nsresult StyleSheet::InsertRuleIntoGroup(const nsACString& aRule,
|
|
css::GroupRule* aGroup,
|
|
uint32_t aIndex) {
|
|
NS_ASSERTION(IsComplete(), "No inserting into an incomplete sheet!");
|
|
// check that the group actually belongs to this sheet!
|
|
if (this != aGroup->GetStyleSheet()) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
if (IsReadOnly()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (ModificationDisallowed()) {
|
|
return NS_ERROR_DOM_NOT_ALLOWED_ERR;
|
|
}
|
|
|
|
WillDirty();
|
|
|
|
nsresult result = InsertRuleIntoGroupInternal(aRule, aGroup, aIndex);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
RuleAdded(*aGroup->GetStyleRuleAt(aIndex));
|
|
return NS_OK;
|
|
}
|
|
|
|
uint64_t StyleSheet::FindOwningWindowInnerID() const {
|
|
uint64_t windowID = 0;
|
|
if (Document* doc = GetAssociatedDocument()) {
|
|
windowID = doc->InnerWindowID();
|
|
}
|
|
|
|
if (windowID == 0 && mOwningNode) {
|
|
windowID = mOwningNode->OwnerDoc()->InnerWindowID();
|
|
}
|
|
|
|
RefPtr<css::Rule> ownerRule;
|
|
if (windowID == 0 && (ownerRule = GetDOMOwnerRule())) {
|
|
RefPtr<StyleSheet> sheet = ownerRule->GetStyleSheet();
|
|
if (sheet) {
|
|
windowID = sheet->FindOwningWindowInnerID();
|
|
}
|
|
}
|
|
|
|
if (windowID == 0 && mParentSheet) {
|
|
windowID = mParentSheet->FindOwningWindowInnerID();
|
|
}
|
|
|
|
return windowID;
|
|
}
|
|
|
|
void StyleSheet::RemoveFromParent() {
|
|
if (!mParentSheet) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(mParentSheet->ChildSheets().Contains(this));
|
|
mParentSheet->Inner().mChildren.RemoveElement(this);
|
|
mParentSheet = nullptr;
|
|
}
|
|
|
|
void StyleSheet::SubjectSubsumesInnerPrincipal(nsIPrincipal& aSubjectPrincipal,
|
|
ErrorResult& aRv) {
|
|
StyleSheetInfo& info = Inner();
|
|
|
|
if (aSubjectPrincipal.Subsumes(info.mPrincipal)) {
|
|
return;
|
|
}
|
|
|
|
// Allow access only if CORS mode is not NONE and the security flag
|
|
// is not turned off.
|
|
if (GetCORSMode() == CORS_NONE && !nsContentUtils::BypassCSSOMOriginCheck()) {
|
|
aRv.ThrowSecurityError("Not allowed to access cross-origin stylesheet");
|
|
return;
|
|
}
|
|
|
|
// Now make sure we set the principal of our inner to the subjectPrincipal.
|
|
// We do this because we're in a situation where the caller would not normally
|
|
// be able to access the sheet, but the sheet has opted in to being read.
|
|
// Unfortunately, that means it's also opted in to being _edited_, and if the
|
|
// caller now makes edits to the sheet we want the resulting resource loads,
|
|
// if any, to look as if they are coming from the caller's principal, not the
|
|
// original sheet principal.
|
|
//
|
|
// That means we need a unique inner, of course. But we don't want to do that
|
|
// if we're not complete yet. Luckily, all the callers of this method throw
|
|
// anyway if not complete, so we can just do that here too.
|
|
if (!IsComplete()) {
|
|
aRv.ThrowInvalidAccessError(
|
|
"Not allowed to access still-loading stylesheet");
|
|
return;
|
|
}
|
|
|
|
WillDirty();
|
|
|
|
info.mPrincipal = &aSubjectPrincipal;
|
|
}
|
|
|
|
bool StyleSheet::AreRulesAvailable(nsIPrincipal& aSubjectPrincipal,
|
|
ErrorResult& aRv) {
|
|
// Rules are not available on incomplete sheets.
|
|
if (!IsComplete()) {
|
|
aRv.ThrowInvalidAccessError(
|
|
"Can't access rules of still-loading style sheet");
|
|
return false;
|
|
}
|
|
//-- Security check: Only scripts whose principal subsumes that of the
|
|
// style sheet can access rule collections.
|
|
SubjectSubsumesInnerPrincipal(aSubjectPrincipal, aRv);
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void StyleSheet::SetAssociatedDocumentOrShadowRoot(
|
|
DocumentOrShadowRoot* aDocOrShadowRoot) {
|
|
MOZ_ASSERT(!IsConstructed());
|
|
MOZ_ASSERT(!mParentSheet || !aDocOrShadowRoot,
|
|
"Shouldn't be set on child sheets");
|
|
|
|
// not ref counted
|
|
mDocumentOrShadowRoot = aDocOrShadowRoot;
|
|
|
|
if (Document* doc = GetAssociatedDocument()) {
|
|
MOZ_ASSERT(!mRelevantGlobal);
|
|
mRelevantGlobal = doc->GetScopeObject();
|
|
}
|
|
}
|
|
|
|
void StyleSheet::AppendStyleSheet(StyleSheet& aSheet) {
|
|
WillDirty();
|
|
AppendStyleSheetSilently(aSheet);
|
|
}
|
|
|
|
void StyleSheet::AppendStyleSheetSilently(StyleSheet& aSheet) {
|
|
MOZ_ASSERT(!IsReadOnly());
|
|
|
|
Inner().mChildren.AppendElement(&aSheet);
|
|
|
|
// This is not reference counted. Our parent tells us when
|
|
// it's going away.
|
|
aSheet.mParentSheet = this;
|
|
}
|
|
|
|
size_t StyleSheet::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
|
|
size_t n = 0;
|
|
n += aMallocSizeOf(this);
|
|
|
|
// We want to measure the inner with only one of the children, and it makes
|
|
// sense for it to be the latest as it is the most likely to be reachable.
|
|
if (Inner().mSheets.LastElement() == this) {
|
|
n += Inner().SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it
|
|
// is worthwhile:
|
|
// - mTitle
|
|
// - mMedia
|
|
// - mStyleSets
|
|
// - mRuleList
|
|
|
|
return n;
|
|
}
|
|
|
|
#if defined(DEBUG) || defined(MOZ_LAYOUT_DEBUGGER)
|
|
void StyleSheet::List(FILE* aOut, int32_t aIndent) {
|
|
for (StyleSheet* child : ChildSheets()) {
|
|
child->List(aOut, aIndent);
|
|
}
|
|
|
|
nsCString line;
|
|
for (int i = 0; i < aIndent; ++i) {
|
|
line.AppendLiteral(" ");
|
|
}
|
|
|
|
line.AppendLiteral("/* ");
|
|
|
|
nsCString url;
|
|
GetSheetURI()->GetSpec(url);
|
|
if (url.IsEmpty()) {
|
|
line.AppendLiteral("(no URL)");
|
|
} else {
|
|
line.Append(url);
|
|
}
|
|
|
|
line.AppendLiteral(" (");
|
|
|
|
switch (GetOrigin()) {
|
|
case StyleOrigin::UserAgent:
|
|
line.AppendLiteral("User Agent");
|
|
break;
|
|
case StyleOrigin::User:
|
|
line.AppendLiteral("User");
|
|
break;
|
|
case StyleOrigin::Author:
|
|
line.AppendLiteral("Author");
|
|
break;
|
|
}
|
|
|
|
if (mMedia) {
|
|
nsAutoCString buffer;
|
|
mMedia->GetText(buffer);
|
|
|
|
if (!buffer.IsEmpty()) {
|
|
line.AppendLiteral(", ");
|
|
line.Append(buffer);
|
|
}
|
|
}
|
|
|
|
line.AppendLiteral(") */");
|
|
|
|
fprintf_stderr(aOut, "%s\n\n", line.get());
|
|
|
|
nsCString newlineIndent;
|
|
newlineIndent.Append('\n');
|
|
for (int i = 0; i < aIndent; ++i) {
|
|
newlineIndent.AppendLiteral(" ");
|
|
}
|
|
|
|
ServoCSSRuleList* ruleList = GetCssRulesInternal();
|
|
for (uint32_t i = 0, len = ruleList->Length(); i < len; ++i) {
|
|
css::Rule* rule = ruleList->GetRule(i);
|
|
|
|
nsAutoCString cssText;
|
|
rule->GetCssText(cssText);
|
|
cssText.ReplaceSubstring("\n"_ns, newlineIndent);
|
|
fprintf_stderr(aOut, "%s\n", cssText.get());
|
|
}
|
|
|
|
if (ruleList->Length() != 0) {
|
|
fprintf_stderr(aOut, "\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void StyleSheet::SetMedia(already_AddRefed<dom::MediaList> aMedia) {
|
|
mMedia = aMedia;
|
|
if (mMedia) {
|
|
mMedia->SetStyleSheet(this);
|
|
}
|
|
}
|
|
|
|
void StyleSheet::DropMedia() {
|
|
if (mMedia) {
|
|
mMedia->SetStyleSheet(nullptr);
|
|
mMedia = nullptr;
|
|
}
|
|
}
|
|
|
|
dom::MediaList* StyleSheet::Media() {
|
|
if (!mMedia) {
|
|
mMedia = dom::MediaList::Create(EmptyCString());
|
|
mMedia->SetStyleSheet(this);
|
|
}
|
|
|
|
return mMedia;
|
|
}
|
|
|
|
// nsWrapperCache
|
|
|
|
JSObject* StyleSheet::WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
return dom::CSSStyleSheet_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
void StyleSheet::BuildChildListAfterInnerClone() {
|
|
MOZ_ASSERT(Inner().mSheets.Length() == 1, "Should've just cloned");
|
|
MOZ_ASSERT(Inner().mSheets[0] == this);
|
|
MOZ_ASSERT(Inner().mChildren.IsEmpty());
|
|
|
|
auto* contents = Inner().mContents.get();
|
|
RefPtr<ServoCssRules> rules = Servo_StyleSheet_GetRules(contents).Consume();
|
|
|
|
uint32_t index = 0;
|
|
while (true) {
|
|
uint32_t line, column; // Actually unused.
|
|
RefPtr<RawServoImportRule> import =
|
|
Servo_CssRules_GetImportRuleAt(rules, index, &line, &column).Consume();
|
|
if (!import) {
|
|
// Note that only @charset rules come before @import rules, and @charset
|
|
// rules are parsed but skipped, so we can stop iterating as soon as we
|
|
// find something that isn't an @import rule.
|
|
break;
|
|
}
|
|
auto* sheet = const_cast<StyleSheet*>(Servo_ImportRule_GetSheet(import));
|
|
MOZ_ASSERT(sheet);
|
|
AppendStyleSheetSilently(*sheet);
|
|
index++;
|
|
}
|
|
}
|
|
|
|
already_AddRefed<StyleSheet> StyleSheet::CreateEmptyChildSheet(
|
|
already_AddRefed<dom::MediaList> aMediaList) const {
|
|
RefPtr<StyleSheet> child =
|
|
new StyleSheet(ParsingMode(), CORSMode::CORS_NONE, SRIMetadata());
|
|
|
|
child->mMedia = aMediaList;
|
|
return child.forget();
|
|
}
|
|
|
|
// We disable parallel stylesheet parsing if any of the following three
|
|
// conditions hold:
|
|
//
|
|
// (1) The pref is off.
|
|
// (2) The browser is recording CSS errors (which parallel parsing can't
|
|
// handle).
|
|
// (3) The stylesheet is a chrome stylesheet, since those can use
|
|
// -moz-bool-pref, which needs to access the pref service, which is not
|
|
// threadsafe.
|
|
static bool AllowParallelParse(css::Loader& aLoader, URLExtraData* aUrlData) {
|
|
// If the browser is recording CSS errors, we need to use the sequential path
|
|
// because the parallel path doesn't support that.
|
|
Document* doc = aLoader.GetDocument();
|
|
if (doc && css::ErrorReporter::ShouldReportErrors(*doc)) {
|
|
return false;
|
|
}
|
|
|
|
// If this is a chrome stylesheet, it might use -moz-bool-pref, which needs to
|
|
// access the pref service, which is not thread-safe. We could probably expose
|
|
// the relevant booleans as thread-safe var caches if we needed to, but
|
|
// parsing chrome stylesheets in parallel is unlikely to be a win anyway.
|
|
//
|
|
// Note that UA stylesheets can also use -moz-bool-pref, but those are always
|
|
// parsed sync.
|
|
if (aUrlData->ChromeRulesEnabled()) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
RefPtr<StyleSheetParsePromise> StyleSheet::ParseSheet(
|
|
css::Loader& aLoader, const nsACString& aBytes,
|
|
css::SheetLoadData& aLoadData) {
|
|
MOZ_ASSERT(mParsePromise.IsEmpty());
|
|
RefPtr<StyleSheetParsePromise> p = mParsePromise.Ensure(__func__);
|
|
SetURLExtraData();
|
|
|
|
// @import rules are disallowed due to this decision:
|
|
// https://github.com/WICG/construct-stylesheets/issues/119#issuecomment-588352418
|
|
// We may allow @import rules again in the future.
|
|
auto allowImportRules = SelfOrAncestorIsConstructed()
|
|
? StyleAllowImportRules::No
|
|
: StyleAllowImportRules::Yes;
|
|
const bool shouldRecordCounters =
|
|
aLoader.GetDocument() && aLoader.GetDocument()->GetStyleUseCounters();
|
|
if (!AllowParallelParse(aLoader, Inner().mURLData)) {
|
|
UniquePtr<StyleUseCounters> counters =
|
|
shouldRecordCounters ? Servo_UseCounters_Create().Consume() : nullptr;
|
|
|
|
RefPtr<RawServoStyleSheetContents> contents =
|
|
Servo_StyleSheet_FromUTF8Bytes(
|
|
&aLoader, this, &aLoadData, &aBytes, mParsingMode, Inner().mURLData,
|
|
aLoadData.mLineNumber, aLoadData.mCompatMode,
|
|
/* reusable_sheets = */ nullptr, counters.get(), allowImportRules,
|
|
StyleSanitizationKind::None,
|
|
/* sanitized_output = */ nullptr)
|
|
.Consume();
|
|
aLoadData.mUseCounters = std::move(counters);
|
|
FinishAsyncParse(contents.forget());
|
|
} else {
|
|
auto holder = MakeRefPtr<css::SheetLoadDataHolder>(__func__, &aLoadData);
|
|
Servo_StyleSheet_FromUTF8BytesAsync(
|
|
holder, Inner().mURLData, &aBytes, mParsingMode, aLoadData.mLineNumber,
|
|
aLoadData.mCompatMode, shouldRecordCounters, allowImportRules);
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
void StyleSheet::FinishAsyncParse(
|
|
already_AddRefed<RawServoStyleSheetContents> aSheetContents) {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
MOZ_ASSERT(!mParsePromise.IsEmpty());
|
|
Inner().mContents = aSheetContents;
|
|
FinishParse();
|
|
mParsePromise.Resolve(true, __func__);
|
|
}
|
|
|
|
void StyleSheet::ParseSheetSync(
|
|
css::Loader* aLoader, const nsACString& aBytes,
|
|
css::SheetLoadData* aLoadData, uint32_t aLineNumber,
|
|
css::LoaderReusableStyleSheets* aReusableSheets) {
|
|
const nsCompatibility compatMode = [&] {
|
|
if (aLoadData) {
|
|
return aLoadData->mCompatMode;
|
|
}
|
|
if (aLoader) {
|
|
return aLoader->CompatMode(css::StylePreloadKind::None);
|
|
}
|
|
return eCompatibility_FullStandards;
|
|
}();
|
|
|
|
const StyleUseCounters* useCounters =
|
|
aLoader && aLoader->GetDocument()
|
|
? aLoader->GetDocument()->GetStyleUseCounters()
|
|
: nullptr;
|
|
|
|
auto allowImportRules = SelfOrAncestorIsConstructed()
|
|
? StyleAllowImportRules::No
|
|
: StyleAllowImportRules::Yes;
|
|
|
|
SetURLExtraData();
|
|
Inner().mContents =
|
|
Servo_StyleSheet_FromUTF8Bytes(
|
|
aLoader, this, aLoadData, &aBytes, mParsingMode, Inner().mURLData,
|
|
aLineNumber, compatMode, aReusableSheets, useCounters,
|
|
allowImportRules, StyleSanitizationKind::None,
|
|
/* sanitized_output = */ nullptr)
|
|
.Consume();
|
|
|
|
FinishParse();
|
|
}
|
|
|
|
void StyleSheet::FinishParse() {
|
|
nsString sourceMapURL;
|
|
Servo_StyleSheet_GetSourceMapURL(Inner().mContents, &sourceMapURL);
|
|
SetSourceMapURLFromComment(sourceMapURL);
|
|
|
|
nsString sourceURL;
|
|
Servo_StyleSheet_GetSourceURL(Inner().mContents, &sourceURL);
|
|
SetSourceURL(sourceURL);
|
|
}
|
|
|
|
void StyleSheet::ReparseSheet(const nsACString& aInput, ErrorResult& aRv) {
|
|
if (!IsComplete()) {
|
|
return aRv.ThrowInvalidAccessError("Cannot reparse still-loading sheet");
|
|
}
|
|
|
|
// Allowing to modify UA sheets is dangerous (in the sense that C++ code
|
|
// relies on rules in those sheets), plus they're probably going to be shared
|
|
// across processes in which case this is directly a no-go.
|
|
if (IsReadOnly()) {
|
|
return;
|
|
}
|
|
|
|
// Hold strong ref to the CSSLoader in case the document update
|
|
// kills the document
|
|
RefPtr<css::Loader> loader;
|
|
if (Document* doc = GetAssociatedDocument()) {
|
|
loader = doc->CSSLoader();
|
|
NS_ASSERTION(loader, "Document with no CSS loader!");
|
|
} else {
|
|
loader = new css::Loader;
|
|
}
|
|
|
|
WillDirty();
|
|
|
|
// cache child sheets to reuse
|
|
css::LoaderReusableStyleSheets reusableSheets;
|
|
for (StyleSheet* child : ChildSheets()) {
|
|
if (child->GetOriginalURI()) {
|
|
reusableSheets.AddReusableSheet(child);
|
|
}
|
|
}
|
|
|
|
// Clean up child sheets list.
|
|
for (StyleSheet* child : ChildSheets()) {
|
|
child->mParentSheet = nullptr;
|
|
}
|
|
Inner().mChildren.Clear();
|
|
|
|
uint32_t lineNumber = 1;
|
|
if (auto* linkStyle = LinkStyle::FromNodeOrNull(mOwningNode)) {
|
|
lineNumber = linkStyle->GetLineNumber();
|
|
}
|
|
|
|
// Notify to the stylesets about the old rules going away.
|
|
{
|
|
ServoCSSRuleList* ruleList = GetCssRulesInternal();
|
|
MOZ_ASSERT(ruleList);
|
|
|
|
uint32_t ruleCount = ruleList->Length();
|
|
for (uint32_t i = 0; i < ruleCount; ++i) {
|
|
css::Rule* rule = ruleList->GetRule(i);
|
|
MOZ_ASSERT(rule);
|
|
RuleRemoved(*rule);
|
|
}
|
|
}
|
|
|
|
DropRuleList();
|
|
|
|
ParseSheetSync(loader, aInput, /* aLoadData = */ nullptr, lineNumber,
|
|
&reusableSheets);
|
|
|
|
// Notify the stylesets about the new rules.
|
|
{
|
|
// Get the rule list (which will need to be regenerated after ParseSheet).
|
|
ServoCSSRuleList* ruleList = GetCssRulesInternal();
|
|
MOZ_ASSERT(ruleList);
|
|
|
|
uint32_t ruleCount = ruleList->Length();
|
|
for (uint32_t i = 0; i < ruleCount; ++i) {
|
|
css::Rule* rule = ruleList->GetRule(i);
|
|
MOZ_ASSERT(rule);
|
|
RuleAdded(*rule);
|
|
}
|
|
}
|
|
|
|
// Our rules are no longer considered modified for devtools.
|
|
mState &= ~State::ModifiedRulesForDevtools;
|
|
}
|
|
|
|
void StyleSheet::DropRuleList() {
|
|
if (mRuleList) {
|
|
mRuleList->DropReferences();
|
|
mRuleList = nullptr;
|
|
}
|
|
}
|
|
|
|
already_AddRefed<StyleSheet> StyleSheet::Clone(
|
|
StyleSheet* aCloneParent, dom::CSSImportRule* aCloneOwnerRule,
|
|
dom::DocumentOrShadowRoot* aCloneDocumentOrShadowRoot,
|
|
nsINode* aCloneOwningNode) const {
|
|
MOZ_ASSERT(!IsConstructed(),
|
|
"Cannot create a non-constructed sheet from a constructed sheet");
|
|
RefPtr<StyleSheet> clone = new StyleSheet(
|
|
*this, aCloneParent, aCloneOwnerRule, aCloneDocumentOrShadowRoot,
|
|
/* aConstructorDocToUse */ nullptr, aCloneOwningNode);
|
|
return clone.forget();
|
|
}
|
|
|
|
already_AddRefed<StyleSheet> StyleSheet::CloneAdoptedSheet(
|
|
Document& aConstructorDocument) const {
|
|
MOZ_ASSERT(IsConstructed(),
|
|
"Cannot create a constructed sheet from a non-constructed sheet");
|
|
MOZ_ASSERT(aConstructorDocument.IsStaticDocument(),
|
|
"Should never clone adopted sheets for a non-static document");
|
|
RefPtr<StyleSheet> clone =
|
|
new StyleSheet(*this,
|
|
/* aParentSheetToUse */ nullptr,
|
|
/* aOwnerRuleToUse */ nullptr,
|
|
/* aDocOrShadowRootToUse */ nullptr, &aConstructorDocument,
|
|
/* aOwningNodeToUse */ nullptr);
|
|
return clone.forget();
|
|
}
|
|
|
|
ServoCSSRuleList* StyleSheet::GetCssRulesInternal() {
|
|
if (!mRuleList) {
|
|
EnsureUniqueInner();
|
|
|
|
RefPtr<ServoCssRules> rawRules =
|
|
Servo_StyleSheet_GetRules(Inner().mContents).Consume();
|
|
MOZ_ASSERT(rawRules);
|
|
mRuleList = new ServoCSSRuleList(rawRules.forget(), this, nullptr);
|
|
}
|
|
return mRuleList;
|
|
}
|
|
|
|
uint32_t StyleSheet::InsertRuleInternal(const nsACString& aRule,
|
|
uint32_t aIndex, ErrorResult& aRv) {
|
|
MOZ_ASSERT(!IsReadOnly());
|
|
MOZ_ASSERT(!ModificationDisallowed());
|
|
|
|
// Ensure mRuleList is constructed.
|
|
GetCssRulesInternal();
|
|
|
|
aRv = mRuleList->InsertRule(aRule, aIndex);
|
|
if (aRv.Failed()) {
|
|
return 0;
|
|
}
|
|
|
|
// XXX We may not want to get the rule when stylesheet change event
|
|
// is not enabled.
|
|
css::Rule* rule = mRuleList->GetRule(aIndex);
|
|
RuleAdded(*rule);
|
|
|
|
return aIndex;
|
|
}
|
|
|
|
void StyleSheet::DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv) {
|
|
MOZ_ASSERT(!IsReadOnly());
|
|
MOZ_ASSERT(!ModificationDisallowed());
|
|
|
|
// Ensure mRuleList is constructed.
|
|
GetCssRulesInternal();
|
|
if (aIndex >= mRuleList->Length()) {
|
|
aRv.ThrowIndexSizeError(
|
|
nsPrintfCString("Cannot delete rule at index %u"
|
|
" because the number of rules is only %u",
|
|
aIndex, mRuleList->Length()));
|
|
return;
|
|
}
|
|
|
|
// Hold a strong ref to the rule so it doesn't die when we remove it
|
|
// from the list. XXX We may not want to hold it if stylesheet change
|
|
// event is not enabled.
|
|
RefPtr<css::Rule> rule = mRuleList->GetRule(aIndex);
|
|
aRv = mRuleList->DeleteRule(aIndex);
|
|
if (!aRv.Failed()) {
|
|
RuleRemoved(*rule);
|
|
}
|
|
}
|
|
|
|
nsresult StyleSheet::InsertRuleIntoGroupInternal(const nsACString& aRule,
|
|
css::GroupRule* aGroup,
|
|
uint32_t aIndex) {
|
|
MOZ_ASSERT(!IsReadOnly());
|
|
|
|
auto rules = static_cast<ServoCSSRuleList*>(aGroup->CssRules());
|
|
MOZ_ASSERT(rules->GetParentRule() == aGroup);
|
|
return rules->InsertRule(aRule, aIndex);
|
|
}
|
|
|
|
StyleOrigin StyleSheet::GetOrigin() const {
|
|
return Servo_StyleSheet_GetOrigin(Inner().mContents);
|
|
}
|
|
|
|
void StyleSheet::SetSharedContents(const ServoCssRules* aSharedRules) {
|
|
MOZ_ASSERT(!IsComplete());
|
|
|
|
SetURLExtraData();
|
|
|
|
Inner().mContents =
|
|
Servo_StyleSheet_FromSharedData(Inner().mURLData, aSharedRules).Consume();
|
|
|
|
// Don't call FinishParse(), since that tries to set source map URLs,
|
|
// which we don't have.
|
|
}
|
|
|
|
const ServoCssRules* StyleSheet::ToShared(RawServoSharedMemoryBuilder* aBuilder,
|
|
nsCString& aErrorMessage) {
|
|
// Assert some things we assume when creating a StyleSheet using shared
|
|
// memory.
|
|
MOZ_ASSERT(GetReferrerInfo()->ReferrerPolicy() == ReferrerPolicy::_empty);
|
|
MOZ_ASSERT(GetReferrerInfo()->GetSendReferrer());
|
|
MOZ_ASSERT(!nsCOMPtr<nsIURI>(GetReferrerInfo()->GetComputedReferrer()));
|
|
MOZ_ASSERT(GetCORSMode() == CORS_NONE);
|
|
MOZ_ASSERT(Inner().mIntegrity.IsEmpty());
|
|
MOZ_ASSERT(Principal()->IsSystemPrincipal());
|
|
|
|
const ServoCssRules* rules = Servo_SharedMemoryBuilder_AddStylesheet(
|
|
aBuilder, Inner().mContents, &aErrorMessage);
|
|
|
|
#ifdef DEBUG
|
|
if (!rules) {
|
|
// Print the ToShmem error message so that developers know what to fix.
|
|
printf_stderr("%s\n", aErrorMessage.get());
|
|
MOZ_CRASH("UA style sheet contents failed shared memory requirements");
|
|
}
|
|
#endif
|
|
|
|
return rules;
|
|
}
|
|
|
|
bool StyleSheet::IsReadOnly() const {
|
|
return IsComplete() && GetOrigin() == StyleOrigin::UserAgent;
|
|
}
|
|
|
|
} // namespace mozilla
|