forked from mirrors/gecko-dev
597b7bc37d
The specifics of how this is going to work are still getting spec'd / discussed in https://github.com/w3c/csswg-drafts/issues/6576, but this allows DevTools to work fine and the feature to be complete enough for Nightly experimentation (with the other in-flight patches). Otherwise devtools crashes when trying to inspect pages that use them. Differential Revision: https://phabricator.services.mozilla.com/D124656
137 lines
3.6 KiB
C++
137 lines
3.6 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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/*
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* internal interface representing CSS style rules that contain other
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* rules, such as @media rules
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*/
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#include "mozilla/css/GroupRule.h"
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#include "mozilla/dom/CSSRuleList.h"
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#include "nsPrintfCString.h"
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using namespace mozilla::dom;
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namespace mozilla::css {
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GroupRule::GroupRule(already_AddRefed<ServoCssRules> aRules, StyleSheet* aSheet,
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Rule* aParentRule, uint32_t aLineNumber,
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uint32_t aColumnNumber)
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: Rule(aSheet, aParentRule, aLineNumber, aColumnNumber),
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mRuleList(new ServoCSSRuleList(std::move(aRules), aSheet, this)) {}
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GroupRule::~GroupRule() {
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MOZ_ASSERT(!mSheet, "SetStyleSheet should have been called");
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if (mRuleList) {
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mRuleList->DropReferences();
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}
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}
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NS_IMPL_ADDREF_INHERITED(GroupRule, Rule)
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NS_IMPL_RELEASE_INHERITED(GroupRule, Rule)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GroupRule)
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NS_INTERFACE_MAP_END_INHERITING(Rule)
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bool GroupRule::IsCCLeaf() const {
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// Let's not worry for now about sorting out whether we're a leaf or not.
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return false;
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(GroupRule)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(GroupRule, Rule)
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if (tmp->mRuleList) {
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// If tmp has a style sheet (which can happen if it gets unlinked
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// earlier than its owning style sheet), then we need to null out the
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// style sheet pointer on descendants now, before we clear mRuleList.
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tmp->mRuleList->DropReferences();
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tmp->mRuleList = nullptr;
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}
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(GroupRule, Rule)
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ImplCycleCollectionTraverse(cb, tmp->mRuleList, "mRuleList");
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#ifdef DEBUG
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void GroupRule::List(FILE* out, int32_t aIndent) const {
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// TODO list something reasonable?
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}
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#endif
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/* virtual */
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void GroupRule::DropSheetReference() {
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if (mRuleList) {
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mRuleList->DropSheetReference();
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}
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Rule::DropSheetReference();
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}
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uint32_t GroupRule::InsertRule(const nsACString& aRule, uint32_t aIndex,
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ErrorResult& aRv) {
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if (IsReadOnly()) {
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return 0;
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}
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StyleSheet* sheet = GetStyleSheet();
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if (NS_WARN_IF(!sheet)) {
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aRv.Throw(NS_ERROR_FAILURE);
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return 0;
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}
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uint32_t count = StyleRuleCount();
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if (aIndex > count) {
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aRv.ThrowIndexSizeError(nsPrintfCString(
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"Can't insert rule at index %u because rule list length is %u", aIndex,
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count));
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return 0;
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}
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NS_ASSERTION(count <= INT32_MAX, "Too many style rules!");
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nsresult rv = sheet->InsertRuleIntoGroup(aRule, this, aIndex);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return 0;
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}
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return aIndex;
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}
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void GroupRule::DeleteRule(uint32_t aIndex, ErrorResult& aRv) {
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if (IsReadOnly()) {
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return;
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}
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StyleSheet* sheet = GetStyleSheet();
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if (NS_WARN_IF(!sheet)) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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uint32_t count = StyleRuleCount();
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if (aIndex >= count) {
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aRv.ThrowIndexSizeError(nsPrintfCString(
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"Index %u is too large for list of length %u", aIndex, count));
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return;
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}
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NS_ASSERTION(count <= INT32_MAX, "Too many style rules!");
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nsresult rv = sheet->DeleteRuleFromGroup(this, aIndex);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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}
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}
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size_t GroupRule::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
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// TODO how to implement?
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return 0;
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}
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} // namespace mozilla::css
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