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/* -*- 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
/*
* internal interface representing CSS style rules that contain other
* rules, such as @media rules
*/
#include "mozilla/css/GroupRule.h"
#include "mozilla/dom/CSSRuleList.h"
#include "nsPrintfCString.h"
using namespace mozilla::dom;
namespace mozilla::css {
GroupRule::GroupRule(StyleSheet* aSheet, Rule* aParentRule,
uint32_t aLineNumber, uint32_t aColumnNumber)
: Rule(aSheet, aParentRule, aLineNumber, aColumnNumber) {}
GroupRule::~GroupRule() {
MOZ_ASSERT(!mSheet, "SetStyleSheet should have been called");
if (mRuleList) {
mRuleList->DropReferences();
}
}
NS_IMPL_ADDREF_INHERITED(GroupRule, Rule)
NS_IMPL_RELEASE_INHERITED(GroupRule, Rule)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GroupRule)
NS_INTERFACE_MAP_END_INHERITING(Rule)
bool GroupRule::IsCCLeaf() const {
if (!Rule::IsCCLeaf()) {
return false;
}
return !mRuleList;
}
ServoCSSRuleList* GroupRule::CssRules() {
if (!mRuleList) {
// Lazily create the rule list since most style rules won't have child
// rules.
mRuleList =
new ServoCSSRuleList(GetOrCreateRawRules(), GetStyleSheet(), this);
}
return mRuleList;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(GroupRule)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(GroupRule, Rule)
if (tmp->mRuleList) {
// If tmp has a style sheet (which can happen if it gets unlinked
// earlier than its owning style sheet), then we need to null out the
// style sheet pointer on descendants now, before we clear mRuleList.
tmp->mRuleList->DropReferences();
tmp->mRuleList = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(GroupRule, Rule)
ImplCycleCollectionTraverse(cb, tmp->mRuleList, "mRuleList");
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
#ifdef DEBUG
void GroupRule::List(FILE* out, int32_t aIndent) const {
// TODO list something reasonable?
}
#endif
/* virtual */
void GroupRule::DropSheetReference() {
if (mRuleList) {
mRuleList->DropSheetReference();
}
Rule::DropSheetReference();
}
uint32_t GroupRule::InsertRule(const nsACString& aRule, uint32_t aIndex,
ErrorResult& aRv) {
if (IsReadOnly()) {
return 0;
}
StyleSheet* sheet = GetStyleSheet();
if (NS_WARN_IF(!sheet)) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
uint32_t count = StyleRuleCount();
if (aIndex > count) {
aRv.ThrowIndexSizeError(nsPrintfCString(
"Can't insert rule at index %u because rule list length is %u", aIndex,
count));
return 0;
}
NS_ASSERTION(count <= INT32_MAX, "Too many style rules!");
nsresult rv = sheet->InsertRuleIntoGroup(aRule, this, aIndex);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return 0;
}
return aIndex;
}
void GroupRule::DeleteRule(uint32_t aIndex, ErrorResult& aRv) {
if (IsReadOnly()) {
return;
}
StyleSheet* sheet = GetStyleSheet();
if (NS_WARN_IF(!sheet)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
uint32_t count = StyleRuleCount();
if (aIndex >= count) {
aRv.ThrowIndexSizeError(nsPrintfCString(
"Index %u is too large for list of length %u", aIndex, count));
return;
}
NS_ASSERTION(count <= INT32_MAX, "Too many style rules!");
nsresult rv = sheet->DeleteRuleFromGroup(this, aIndex);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
}
}
size_t GroupRule::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
// TODO how to implement?
return 0;
}
} // namespace mozilla::css