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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /layout/style/nsHTMLStyleSheet.cpp | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | layout/style/nsHTMLStyleSheet.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/layout/style/nsHTMLStyleSheet.cpp b/layout/style/nsHTMLStyleSheet.cpp new file mode 100644 index 0000000000..6e23f63ac2 --- /dev/null +++ b/layout/style/nsHTMLStyleSheet.cpp @@ -0,0 +1,182 @@ +/* -*- 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/. */ + +/* + * style sheet and style rule processor representing data from presentational + * HTML attributes + */ + +#include "nsHTMLStyleSheet.h" +#include "nsMappedAttributes.h" +#include "nsGkAtoms.h" +#include "nsPresContext.h" +#include "mozilla/PresShell.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/DocumentInlines.h" +#include "nsStyleConsts.h" +#include "nsError.h" +#include "mozilla/MemoryReporting.h" +#include "mozilla/dom/Element.h" +#include "nsHashKeys.h" +#include "mozilla/OperatorNewExtensions.h" +#include "mozilla/RestyleManager.h" +#include "mozilla/ServoBindings.h" +#include "mozilla/ServoStyleSet.h" + +using namespace mozilla; +using namespace mozilla::dom; + +// ----------------------------------------------------------- + +struct MappedAttrTableEntry : public PLDHashEntryHdr { + nsMappedAttributes* mAttributes; +}; + +static PLDHashNumber MappedAttrTable_HashKey(const void* key) { + nsMappedAttributes* attributes = + static_cast<nsMappedAttributes*>(const_cast<void*>(key)); + + return attributes->HashValue(); +} + +static void MappedAttrTable_ClearEntry(PLDHashTable* table, + PLDHashEntryHdr* hdr) { + MappedAttrTableEntry* entry = static_cast<MappedAttrTableEntry*>(hdr); + + entry->mAttributes->DropStyleSheetReference(); + memset(entry, 0, sizeof(MappedAttrTableEntry)); +} + +static bool MappedAttrTable_MatchEntry(const PLDHashEntryHdr* hdr, + const void* key) { + nsMappedAttributes* attributes = + static_cast<nsMappedAttributes*>(const_cast<void*>(key)); + const MappedAttrTableEntry* entry = + static_cast<const MappedAttrTableEntry*>(hdr); + + return attributes->Equals(entry->mAttributes); +} + +static const PLDHashTableOps MappedAttrTable_Ops = { + MappedAttrTable_HashKey, MappedAttrTable_MatchEntry, + PLDHashTable::MoveEntryStub, MappedAttrTable_ClearEntry, nullptr}; + +// ----------------------------------------------------------- + +// ----------------------------------------------------------- + +nsHTMLStyleSheet::nsHTMLStyleSheet(Document* aDocument) + : mDocument(aDocument), + mMappedAttrTable(&MappedAttrTable_Ops, sizeof(MappedAttrTableEntry)), + mMappedAttrsDirty(false) { + MOZ_ASSERT(aDocument); +} + +void nsHTMLStyleSheet::SetOwningDocument(Document* aDocument) { + mDocument = aDocument; // not refcounted +} + +void nsHTMLStyleSheet::Reset() { + mServoUnvisitedLinkDecl = nullptr; + mServoVisitedLinkDecl = nullptr; + mServoActiveLinkDecl = nullptr; + + mMappedAttrTable.Clear(); + mMappedAttrsDirty = false; +} + +nsresult nsHTMLStyleSheet::ImplLinkColorSetter( + RefPtr<StyleLockedDeclarationBlock>& aDecl, nscolor aColor) { + if (!mDocument || !mDocument->GetPresShell()) { + return NS_OK; + } + + MOZ_ASSERT(!ServoStyleSet::IsInServoTraversal()); + aDecl = Servo_DeclarationBlock_CreateEmpty().Consume(); + Servo_DeclarationBlock_SetColorValue(aDecl.get(), eCSSProperty_color, aColor); + + // Now make sure we restyle any links that might need it. This + // shouldn't happen often, so just rebuilding everything is ok. + if (Element* root = mDocument->GetRootElement()) { + RestyleManager* rm = mDocument->GetPresContext()->RestyleManager(); + rm->PostRestyleEvent(root, RestyleHint::RestyleSubtree(), nsChangeHint(0)); + } + return NS_OK; +} + +nsresult nsHTMLStyleSheet::SetLinkColor(nscolor aColor) { + return ImplLinkColorSetter(mServoUnvisitedLinkDecl, aColor); +} + +nsresult nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor) { + return ImplLinkColorSetter(mServoActiveLinkDecl, aColor); +} + +nsresult nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor) { + return ImplLinkColorSetter(mServoVisitedLinkDecl, aColor); +} + +already_AddRefed<nsMappedAttributes> nsHTMLStyleSheet::UniqueMappedAttributes( + nsMappedAttributes* aMapped) { + mMappedAttrsDirty = true; + auto entry = static_cast<MappedAttrTableEntry*>( + mMappedAttrTable.Add(aMapped, fallible)); + if (!entry) return nullptr; + if (!entry->mAttributes) { + // We added a new entry to the hashtable, so we have a new unique set. + entry->mAttributes = aMapped; + } + RefPtr<nsMappedAttributes> ret = entry->mAttributes; + return ret.forget(); +} + +void nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped) { + NS_ENSURE_TRUE_VOID(aMapped); +#ifdef DEBUG + uint32_t entryCount = mMappedAttrTable.EntryCount() - 1; +#endif + + mMappedAttrTable.Remove(aMapped); + + NS_ASSERTION(entryCount == mMappedAttrTable.EntryCount(), "not removed"); +} + +void nsHTMLStyleSheet::CalculateMappedServoDeclarations() { + for (auto iter = mMappedAttrTable.ConstIter(); !iter.Done(); iter.Next()) { + MappedAttrTableEntry* attr = static_cast<MappedAttrTableEntry*>(iter.Get()); + if (attr->mAttributes->GetServoStyle()) { + // Only handle cases which haven't been filled in already + continue; + } + attr->mAttributes->LazilyResolveServoDeclaration(mDocument); + } +} + +size_t nsHTMLStyleSheet::DOMSizeOfIncludingThis( + MallocSizeOf aMallocSizeOf) const { + size_t n = aMallocSizeOf(this); + + n += mMappedAttrTable.ShallowSizeOfExcludingThis(aMallocSizeOf); + for (auto iter = mMappedAttrTable.ConstIter(); !iter.Done(); iter.Next()) { + auto entry = static_cast<MappedAttrTableEntry*>(iter.Get()); + n += entry->mAttributes->SizeOfIncludingThis(aMallocSizeOf); + } + + // Measurement of the following members may be added later if DMD finds it is + // worthwhile: + // - mURL + // - mLinkRule + // - mVisitedRule + // - mActiveRule + // - mTableQuirkColorRule + // - mTableTHRule + // - mLangRuleTable + // + // The following members are not measured: + // - mDocument, because it's non-owning + + return n; +} |