michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  *
michael@0:  * This Original Code has been modified by IBM Corporation. Modifications made by IBM 
michael@0:  * described herein are Copyright (c) International Business Machines Corporation, 2000.
michael@0:  * Modifications to Mozilla code or documentation identified per MPL Section 3.3
michael@0:  *
michael@0:  * Date             Modified by     Description of modification
michael@0:  * 04/20/2000       IBM Corp.      OS/2 VisualAge build.
michael@0:  */
michael@0: 
michael@0: /*
michael@0:  * style sheet and style rule processor representing data from presentational
michael@0:  * HTML attributes
michael@0:  */
michael@0: 
michael@0: #include "nsHTMLStyleSheet.h"
michael@0: #include "nsMappedAttributes.h"
michael@0: #include "nsGkAtoms.h"
michael@0: #include "nsPresContext.h"
michael@0: #include "mozilla/EventStates.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsIPresShell.h"
michael@0: #include "nsStyleConsts.h"
michael@0: #include "nsRuleWalker.h"
michael@0: #include "nsRuleData.h"
michael@0: #include "nsError.h"
michael@0: #include "nsRuleProcessorData.h"
michael@0: #include "nsCSSRuleProcessor.h"
michael@0: #include "mozilla/MemoryReporting.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "nsHashKeys.h"
michael@0: #include "RestyleManager.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsHTMLStyleSheet::HTMLColorRule, nsIStyleRule)
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::HTMLColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
michael@0: {
michael@0:   if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
michael@0:     nsCSSValue* color = aRuleData->ValueForColor();
michael@0:     if (color->GetUnit() == eCSSUnit_Null &&
michael@0:         aRuleData->mPresContext->UseDocumentColors())
michael@0:       color->SetColorValue(mColor);
michael@0:   }
michael@0: }
michael@0: 
michael@0: #ifdef DEBUG
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::HTMLColorRule::List(FILE* out, int32_t aIndent) const
michael@0: {
michael@0:   for (int32_t index = aIndent; --index >= 0; ) fputs("  ", out);
michael@0:   fputs("[html color rule] {}\n", out);
michael@0: }
michael@0: #endif
michael@0: 
michael@0:  
michael@0: NS_IMPL_ISUPPORTS(nsHTMLStyleSheet::GenericTableRule, nsIStyleRule)
michael@0: 
michael@0: #ifdef DEBUG
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::GenericTableRule::List(FILE* out, int32_t aIndent) const
michael@0: {
michael@0:   for (int32_t index = aIndent; --index >= 0; ) fputs("  ", out);
michael@0:   fputs("[generic table rule] {}\n", out);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::TableTHRule::MapRuleInfoInto(nsRuleData* aRuleData)
michael@0: {
michael@0:   if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Text)) {
michael@0:     nsCSSValue* textAlign = aRuleData->ValueForTextAlign();
michael@0:     if (textAlign->GetUnit() == eCSSUnit_Null) {
michael@0:       textAlign->SetIntValue(NS_STYLE_TEXT_ALIGN_MOZ_CENTER_OR_INHERIT,
michael@0:                              eCSSUnit_Enumerated);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::TableQuirkColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
michael@0: {
michael@0:   if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
michael@0:     nsCSSValue* color = aRuleData->ValueForColor();
michael@0:     // We do not check UseDocumentColors() here, because we want to
michael@0:     // use the body color no matter what.
michael@0:     if (color->GetUnit() == eCSSUnit_Null)
michael@0:       color->SetIntValue(NS_STYLE_COLOR_INHERIT_FROM_BODY,
michael@0:                          eCSSUnit_Enumerated);
michael@0:   }
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsHTMLStyleSheet::LangRule, nsIStyleRule)
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::LangRule::MapRuleInfoInto(nsRuleData* aRuleData)
michael@0: {
michael@0:   if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Font)) {
michael@0:     nsCSSValue* lang = aRuleData->ValueForLang();
michael@0:     if (lang->GetUnit() == eCSSUnit_Null) {
michael@0:       lang->SetStringValue(mLang, eCSSUnit_Ident);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: #ifdef DEBUG
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::LangRule::List(FILE* out, int32_t aIndent) const
michael@0: {
michael@0:   for (int32_t index = aIndent; --index >= 0; ) fputs("  ", out);
michael@0:   fputs("[lang rule] { language: \"", out);
michael@0:   fputs(NS_ConvertUTF16toUTF8(mLang).get(), out);
michael@0:   fputs("\" }\n", out);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: // -----------------------------------------------------------
michael@0: 
michael@0: struct MappedAttrTableEntry : public PLDHashEntryHdr {
michael@0:   nsMappedAttributes *mAttributes;
michael@0: };
michael@0: 
michael@0: static PLDHashNumber
michael@0: MappedAttrTable_HashKey(PLDHashTable *table, const void *key)
michael@0: {
michael@0:   nsMappedAttributes *attributes =
michael@0:     static_cast<nsMappedAttributes*>(const_cast<void*>(key));
michael@0: 
michael@0:   return attributes->HashValue();
michael@0: }
michael@0: 
michael@0: static void
michael@0: MappedAttrTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
michael@0: {
michael@0:   MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>(hdr);
michael@0: 
michael@0:   entry->mAttributes->DropStyleSheetReference();
michael@0:   memset(entry, 0, sizeof(MappedAttrTableEntry));
michael@0: }
michael@0: 
michael@0: static bool
michael@0: MappedAttrTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
michael@0:                            const void *key)
michael@0: {
michael@0:   nsMappedAttributes *attributes =
michael@0:     static_cast<nsMappedAttributes*>(const_cast<void*>(key));
michael@0:   const MappedAttrTableEntry *entry =
michael@0:     static_cast<const MappedAttrTableEntry*>(hdr);
michael@0: 
michael@0:   return attributes->Equals(entry->mAttributes);
michael@0: }
michael@0: 
michael@0: static const PLDHashTableOps MappedAttrTable_Ops = {
michael@0:   PL_DHashAllocTable,
michael@0:   PL_DHashFreeTable,
michael@0:   MappedAttrTable_HashKey,
michael@0:   MappedAttrTable_MatchEntry,
michael@0:   PL_DHashMoveEntryStub,
michael@0:   MappedAttrTable_ClearEntry,
michael@0:   PL_DHashFinalizeStub,
michael@0:   nullptr
michael@0: };
michael@0: 
michael@0: // -----------------------------------------------------------
michael@0: 
michael@0: struct LangRuleTableEntry : public PLDHashEntryHdr {
michael@0:   nsRefPtr<nsHTMLStyleSheet::LangRule> mRule;
michael@0: };
michael@0: 
michael@0: static PLDHashNumber
michael@0: LangRuleTable_HashKey(PLDHashTable *table, const void *key)
michael@0: {
michael@0:   const nsString *lang = static_cast<const nsString*>(key);
michael@0:   return HashString(*lang);
michael@0: }
michael@0: 
michael@0: static void
michael@0: LangRuleTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
michael@0: {
michael@0:   LangRuleTableEntry *entry = static_cast<LangRuleTableEntry*>(hdr);
michael@0: 
michael@0:   entry->~LangRuleTableEntry();
michael@0:   memset(entry, 0, sizeof(LangRuleTableEntry));
michael@0: }
michael@0: 
michael@0: static bool
michael@0: LangRuleTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
michael@0:                          const void *key)
michael@0: {
michael@0:   const nsString *lang = static_cast<const nsString*>(key);
michael@0:   const LangRuleTableEntry *entry = static_cast<const LangRuleTableEntry*>(hdr);
michael@0: 
michael@0:   return entry->mRule->mLang == *lang;
michael@0: }
michael@0: 
michael@0: static bool
michael@0: LangRuleTable_InitEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
michael@0:                         const void *key)
michael@0: {
michael@0:   const nsString *lang = static_cast<const nsString*>(key);
michael@0: 
michael@0:   LangRuleTableEntry *entry = new (hdr) LangRuleTableEntry();
michael@0: 
michael@0:   // Create the unique rule for this language
michael@0:   entry->mRule = new nsHTMLStyleSheet::LangRule(*lang);
michael@0: 
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: static const PLDHashTableOps LangRuleTable_Ops = {
michael@0:   PL_DHashAllocTable,
michael@0:   PL_DHashFreeTable,
michael@0:   LangRuleTable_HashKey,
michael@0:   LangRuleTable_MatchEntry,
michael@0:   PL_DHashMoveEntryStub,
michael@0:   LangRuleTable_ClearEntry,
michael@0:   PL_DHashFinalizeStub,
michael@0:   LangRuleTable_InitEntry
michael@0: };
michael@0: 
michael@0: // -----------------------------------------------------------
michael@0: 
michael@0: nsHTMLStyleSheet::nsHTMLStyleSheet(nsIDocument* aDocument)
michael@0:   : mDocument(aDocument)
michael@0:   , mTableQuirkColorRule(new TableQuirkColorRule())
michael@0:   , mTableTHRule(new TableTHRule())
michael@0: {
michael@0:   MOZ_ASSERT(aDocument);
michael@0:   mMappedAttrTable.ops = nullptr;
michael@0:   mLangRuleTable.ops = nullptr;
michael@0: }
michael@0: 
michael@0: nsHTMLStyleSheet::~nsHTMLStyleSheet()
michael@0: {
michael@0:   if (mLangRuleTable.ops)
michael@0:     PL_DHashTableFinish(&mLangRuleTable);
michael@0:   if (mMappedAttrTable.ops)
michael@0:     PL_DHashTableFinish(&mMappedAttrTable);
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsHTMLStyleSheet, nsIStyleRuleProcessor)
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
michael@0: {
michael@0:   nsRuleWalker *ruleWalker = aData->mRuleWalker;
michael@0:   if (aData->mElement->IsHTML() && !ruleWalker->AuthorStyleDisabled()) {
michael@0:     nsIAtom* tag = aData->mElement->Tag();
michael@0: 
michael@0:     // if we have anchor colors, check if this is an anchor with an href
michael@0:     if (tag == nsGkAtoms::a) {
michael@0:       if (mLinkRule || mVisitedRule || mActiveRule) {
michael@0:         EventStates state =
michael@0:           nsCSSRuleProcessor::GetContentStateForVisitedHandling(
michael@0:                                   aData->mElement,
michael@0:                                   aData->mTreeMatchContext,
michael@0:                                   aData->mTreeMatchContext.VisitedHandling(),
michael@0:                                   // If the node being matched is a link,
michael@0:                                   // it's the relevant link.
michael@0:                                   nsCSSRuleProcessor::IsLink(aData->mElement));
michael@0:         if (mLinkRule && state.HasState(NS_EVENT_STATE_UNVISITED)) {
michael@0:           ruleWalker->Forward(mLinkRule);
michael@0:           aData->mTreeMatchContext.SetHaveRelevantLink();
michael@0:         }
michael@0:         else if (mVisitedRule && state.HasState(NS_EVENT_STATE_VISITED)) {
michael@0:           ruleWalker->Forward(mVisitedRule);
michael@0:           aData->mTreeMatchContext.SetHaveRelevantLink();
michael@0:         }
michael@0: 
michael@0:         // No need to add to the active rule if it's not a link
michael@0:         if (mActiveRule && nsCSSRuleProcessor::IsLink(aData->mElement) &&
michael@0:             state.HasState(NS_EVENT_STATE_ACTIVE)) {
michael@0:           ruleWalker->Forward(mActiveRule);
michael@0:         }
michael@0:       } // end link/visited/active rules
michael@0:     } // end A tag
michael@0:     // add the rule to handle text-align for a <th>
michael@0:     else if (tag == nsGkAtoms::th) {
michael@0:       ruleWalker->Forward(mTableTHRule);
michael@0:     }
michael@0:     else if (tag == nsGkAtoms::table) {
michael@0:       if (aData->mTreeMatchContext.mCompatMode == eCompatibility_NavQuirks) {
michael@0:         ruleWalker->Forward(mTableQuirkColorRule);
michael@0:       }
michael@0:     }
michael@0:   } // end html element
michael@0: 
michael@0:   // just get the style rules from the content.  For SVG we do this even if
michael@0:   // author style is disabled, because SVG presentational hints aren't
michael@0:   // considered style.
michael@0:   if (!ruleWalker->AuthorStyleDisabled() || aData->mElement->IsSVG()) {
michael@0:     aData->mElement->WalkContentStyleRules(ruleWalker);
michael@0:   }
michael@0: 
michael@0:   // http://www.whatwg.org/specs/web-apps/current-work/multipage/elements.html#language
michael@0:   // says that the xml:lang attribute overrides HTML's lang attribute,
michael@0:   // so we need to do this after WalkContentStyleRules.
michael@0:   nsString lang;
michael@0:   if (aData->mElement->GetAttr(kNameSpaceID_XML, nsGkAtoms::lang, lang)) {
michael@0:     ruleWalker->Forward(LangRuleFor(lang));
michael@0:   }
michael@0: }
michael@0: 
michael@0: // Test if style is dependent on content state
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
michael@0: {
michael@0:   if (aData->mElement->IsHTML(nsGkAtoms::a) &&
michael@0:       nsCSSRuleProcessor::IsLink(aData->mElement) &&
michael@0:       ((mActiveRule && aData->mStateMask.HasState(NS_EVENT_STATE_ACTIVE)) ||
michael@0:        (mLinkRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)) ||
michael@0:        (mVisitedRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)))) {
michael@0:     return eRestyle_Self;
michael@0:   }
michael@0:   
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
michael@0: {
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ bool
michael@0: nsHTMLStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
michael@0: {
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
michael@0: {
michael@0:   // Do nothing on before-change checks
michael@0:   if (!aData->mAttrHasChanged) {
michael@0:     return nsRestyleHint(0);
michael@0:   }
michael@0: 
michael@0:   // Note: no need to worry about whether some states changed with this
michael@0:   // attribute here, because we handle that under HasStateDependentStyle() as
michael@0:   // needed.
michael@0: 
michael@0:   // Result is true for |href| changes on HTML links if we have link rules.
michael@0:   Element *element = aData->mElement;
michael@0:   if (aData->mAttribute == nsGkAtoms::href &&
michael@0:       (mLinkRule || mVisitedRule || mActiveRule) &&
michael@0:       element->IsHTML(nsGkAtoms::a)) {
michael@0:     return eRestyle_Self;
michael@0:   }
michael@0: 
michael@0:   // Don't worry about the mDocumentColorRule since it only applies
michael@0:   // to descendants of body, when we're already reresolving.
michael@0: 
michael@0:   // Handle the content style rules.
michael@0:   if (element->IsAttributeMapped(aData->mAttribute)) {
michael@0:     // cellpadding on tables is special and requires reresolving all
michael@0:     // the cells in the table
michael@0:     if (aData->mAttribute == nsGkAtoms::cellpadding &&
michael@0:         element->IsHTML(nsGkAtoms::table)) {
michael@0:       return eRestyle_Subtree;
michael@0:     }
michael@0:     return eRestyle_Self;
michael@0:   }
michael@0: 
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ bool
michael@0: nsHTMLStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
michael@0: {
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: /* virtual */ size_t
michael@0: nsHTMLStyleSheet::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
michael@0: }
michael@0: 
michael@0: /* virtual */ size_t
michael@0: nsHTMLStyleSheet::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
michael@0: }
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
michael@0: {
michael@0: }
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
michael@0: {
michael@0: }
michael@0: 
michael@0: #ifdef MOZ_XUL
michael@0: /* virtual */ void
michael@0: nsHTMLStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
michael@0: {
michael@0: }
michael@0: #endif
michael@0: 
michael@0: void
michael@0: nsHTMLStyleSheet::SetOwningDocument(nsIDocument* aDocument)
michael@0: {
michael@0:   mDocument = aDocument; // not refcounted
michael@0: }
michael@0: 
michael@0: void
michael@0: nsHTMLStyleSheet::Reset()
michael@0: {
michael@0:   mLinkRule          = nullptr;
michael@0:   mVisitedRule       = nullptr;
michael@0:   mActiveRule        = nullptr;
michael@0: 
michael@0:   if (mLangRuleTable.ops) {
michael@0:     PL_DHashTableFinish(&mLangRuleTable);
michael@0:     mLangRuleTable.ops = nullptr;
michael@0:   }
michael@0:   if (mMappedAttrTable.ops) {
michael@0:     PL_DHashTableFinish(&mMappedAttrTable);
michael@0:     mMappedAttrTable.ops = nullptr;
michael@0:   }
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsHTMLStyleSheet::ImplLinkColorSetter(nsRefPtr<HTMLColorRule>& aRule, nscolor aColor)
michael@0: {
michael@0:   if (aRule && aRule->mColor == aColor) {
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   aRule = new HTMLColorRule();
michael@0:   if (!aRule)
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:   aRule->mColor = aColor;
michael@0:   // Now make sure we restyle any links that might need it.  This
michael@0:   // shouldn't happen often, so just rebuilding everything is ok.
michael@0:   if (mDocument && mDocument->GetShell()) {
michael@0:     Element* root = mDocument->GetRootElement();
michael@0:     if (root) {
michael@0:       mDocument->GetShell()->GetPresContext()->RestyleManager()->
michael@0:         PostRestyleEvent(root, eRestyle_Subtree, NS_STYLE_HINT_NONE);
michael@0:     }
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsHTMLStyleSheet::SetLinkColor(nscolor aColor)
michael@0: {
michael@0:   return ImplLinkColorSetter(mLinkRule, aColor);
michael@0: }
michael@0: 
michael@0: 
michael@0: nsresult
michael@0: nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor)
michael@0: {
michael@0:   return ImplLinkColorSetter(mActiveRule, aColor);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor)
michael@0: {
michael@0:   return ImplLinkColorSetter(mVisitedRule, aColor);
michael@0: }
michael@0: 
michael@0: already_AddRefed<nsMappedAttributes>
michael@0: nsHTMLStyleSheet::UniqueMappedAttributes(nsMappedAttributes* aMapped)
michael@0: {
michael@0:   if (!mMappedAttrTable.ops) {
michael@0:     PL_DHashTableInit(&mMappedAttrTable, &MappedAttrTable_Ops,
michael@0:                       nullptr, sizeof(MappedAttrTableEntry), 16);
michael@0:   }
michael@0:   MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>
michael@0:                                            (PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_ADD));
michael@0:   if (!entry)
michael@0:     return nullptr;
michael@0:   if (!entry->mAttributes) {
michael@0:     // We added a new entry to the hashtable, so we have a new unique set.
michael@0:     entry->mAttributes = aMapped;
michael@0:   }
michael@0:   nsRefPtr<nsMappedAttributes> ret = entry->mAttributes;
michael@0:   return ret.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped)
michael@0: {
michael@0:   NS_ENSURE_TRUE_VOID(aMapped);
michael@0: 
michael@0:   NS_ASSERTION(mMappedAttrTable.ops, "table uninitialized");
michael@0: #ifdef DEBUG
michael@0:   uint32_t entryCount = mMappedAttrTable.entryCount - 1;
michael@0: #endif
michael@0: 
michael@0:   PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_REMOVE);
michael@0: 
michael@0:   NS_ASSERTION(entryCount == mMappedAttrTable.entryCount, "not removed");
michael@0: }
michael@0: 
michael@0: nsIStyleRule*
michael@0: nsHTMLStyleSheet::LangRuleFor(const nsString& aLanguage)
michael@0: {
michael@0:   if (!mLangRuleTable.ops) {
michael@0:     PL_DHashTableInit(&mLangRuleTable, &LangRuleTable_Ops,
michael@0:                       nullptr, sizeof(LangRuleTableEntry), 16);
michael@0:   }
michael@0:   LangRuleTableEntry *entry = static_cast<LangRuleTableEntry*>
michael@0:     (PL_DHashTableOperate(&mLangRuleTable, &aLanguage, PL_DHASH_ADD));
michael@0:   if (!entry) {
michael@0:     NS_ASSERTION(false, "out of memory");
michael@0:     return nullptr;
michael@0:   }
michael@0:   return entry->mRule;
michael@0: }
michael@0: 
michael@0: static size_t
michael@0: SizeOfAttributesEntryExcludingThis(PLDHashEntryHdr* aEntry,
michael@0:                                    MallocSizeOf aMallocSizeOf,
michael@0:                                    void* aArg)
michael@0: {
michael@0:   NS_PRECONDITION(aEntry, "The entry should not be null!");
michael@0: 
michael@0:   MappedAttrTableEntry* entry = static_cast<MappedAttrTableEntry*>(aEntry);
michael@0:   NS_ASSERTION(entry->mAttributes, "entry->mAttributes should not be null!");
michael@0:   return entry->mAttributes->SizeOfIncludingThis(aMallocSizeOf);
michael@0: }
michael@0: 
michael@0: size_t
michael@0: nsHTMLStyleSheet::DOMSizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   size_t n = aMallocSizeOf(this);
michael@0: 
michael@0:   if (mMappedAttrTable.ops) {
michael@0:     n += PL_DHashTableSizeOfExcludingThis(&mMappedAttrTable,
michael@0:                                           SizeOfAttributesEntryExcludingThis,
michael@0:                                           aMallocSizeOf);
michael@0:   }
michael@0: 
michael@0:   // Measurement of the following members may be added later if DMD finds it is
michael@0:   // worthwhile:
michael@0:   // - mURL
michael@0:   // - mLinkRule
michael@0:   // - mVisitedRule
michael@0:   // - mActiveRule
michael@0:   // - mTableQuirkColorRule
michael@0:   // - mTableTHRule
michael@0:   // - mLangRuleTable
michael@0:   //
michael@0:   // The following members are not measured:
michael@0:   // - mDocument, because it's non-owning
michael@0: 
michael@0:   return n;
michael@0: }