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267 lines
10 KiB
C++
267 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* data structures passed to nsIStyleRuleProcessor methods (to pull loop
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* invariant computations out of the loop)
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*/
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#ifndef nsRuleProcessorData_h_
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#define nsRuleProcessorData_h_
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#include "nsPresContext.h" // for nsCompatability
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#include "nsString.h"
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#include "nsChangeHint.h"
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#include "nsIContent.h"
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#include "nsCSSPseudoElements.h"
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#include "nsRuleWalker.h"
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class nsIStyleSheet;
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class nsIAtom;
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class nsICSSPseudoComparator;
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class nsAttrValue;
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// The implementation of the constructor and destructor are currently in
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// nsCSSRuleProcessor.cpp.
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struct RuleProcessorData {
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RuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsRuleWalker* aRuleWalker,
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nsCompatibility* aCompat = nsnull);
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// NOTE: not |virtual|
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~RuleProcessorData();
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// This should be used for all heap-allocation of RuleProcessorData
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static RuleProcessorData* Create(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsRuleWalker* aRuleWalker,
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nsCompatibility aCompat)
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{
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if (NS_LIKELY(aPresContext)) {
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return new (aPresContext) RuleProcessorData(aPresContext, aElement,
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aRuleWalker, &aCompat);
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}
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return new RuleProcessorData(aPresContext, aElement, aRuleWalker,
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&aCompat);
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}
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void Destroy() {
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nsPresContext * pc = mPresContext;
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if (NS_LIKELY(pc)) {
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this->~RuleProcessorData();
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pc->FreeToShell(sizeof(RuleProcessorData), this);
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return;
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}
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delete this;
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}
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// For placement new
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void* operator new(size_t sz, RuleProcessorData* aSlot) CPP_THROW_NEW {
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return aSlot;
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}
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private:
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void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
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return aContext->AllocateFromShell(sz);
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}
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void* operator new(size_t sz) CPP_THROW_NEW {
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return ::operator new(sz);
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}
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public:
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const nsString* GetLang();
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nsEventStates ContentState();
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nsEventStates DocumentState();
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PRBool IsLink();
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nsEventStates GetContentStateForVisitedHandling(
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nsRuleWalker::VisitedHandlingType aVisitedHandling,
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PRBool aIsRelevantLink);
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// Returns a 1-based index of the child in its parent. If the child
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// is not in its parent's child list (i.e., it is anonymous content),
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// returns 0.
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// If aCheckEdgeOnly is true, the function will return 1 if the result
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// is 1, and something other than 1 (maybe or maybe not a valid
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// result) otherwise.
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PRInt32 GetNthIndex(PRBool aIsOfType, PRBool aIsFromEnd,
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PRBool aCheckEdgeOnly);
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nsPresContext* mPresContext;
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mozilla::dom::Element* mElement; // weak ref, must not be null
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nsIContent* mParentContent; // mElement->GetParent(); weak ref
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nsRuleWalker* mRuleWalker; // Used to add rules to our results.
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nsIContent* mScopedRoot; // Root of scoped stylesheet (set and unset by the supplier of the scoped stylesheet
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nsIAtom* mContentTag; // mElement->GetTag()
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nsIAtom* mContentID; // mElement->GetID()
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PRPackedBool mIsHTMLContent; // whether mElement is IsHTML()
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PRPackedBool mIsHTML; // mIsHTMLContent && IsInHTMLDocument()
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PRPackedBool mHasAttributes; // mElement->GetAttrCount() > 0
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nsCompatibility mCompatMode; // Possibly remove use of this in SelectorMatches?
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PRInt32 mNameSpaceID; // mElement->GetNameSapce()
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const nsAttrValue* mClasses; // mElement->GetClasses()
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// mPreviousSiblingData and mParentData are always RuleProcessorData
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// and never a derived class. They are allocated lazily, when
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// selectors require matching of prior siblings or ancestors.
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RuleProcessorData* mPreviousSiblingData;
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RuleProcessorData* mParentData;
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private:
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nsString *mLanguage; // NULL means we haven't found out the language yet
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// This node's index for :nth-child(), :nth-last-child(),
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// :nth-of-type(), :nth-last-of-type(). If -2, needs to be computed.
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// If -1, needs to be computed but known not to be 1.
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// If 0, the node is not at any index in its parent.
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// The first subscript is 0 for -child and 1 for -of-type, the second
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// subscript is 0 for nth- and 1 for nth-last-.
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PRInt32 mNthIndices[2][2];
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// mContentState is initialized lazily.
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nsEventStates mContentState; // eventStateMgr->GetContentState() or
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// mElement->IntrinsicState() if we have no ESM
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// adjusted for not supporting :visited (but
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// with visitedness information when we support
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// it).
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PRPackedBool mGotContentState;
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};
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struct ElementRuleProcessorData : public RuleProcessorData {
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ElementRuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsRuleWalker* aRuleWalker)
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: RuleProcessorData(aPresContext, aElement, aRuleWalker)
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{
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NS_PRECONDITION(aPresContext, "null pointer");
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NS_PRECONDITION(aRuleWalker, "null pointer");
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}
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};
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struct PseudoElementRuleProcessorData : public RuleProcessorData {
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PseudoElementRuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aParentElement,
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nsRuleWalker* aRuleWalker,
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nsCSSPseudoElements::Type aPseudoType)
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: RuleProcessorData(aPresContext, aParentElement, aRuleWalker),
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mPseudoType(aPseudoType)
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{
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NS_PRECONDITION(aPresContext, "null pointer");
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NS_PRECONDITION(aPseudoType <
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nsCSSPseudoElements::ePseudo_PseudoElementCount,
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"null pointer");
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NS_PRECONDITION(aRuleWalker, "null pointer");
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}
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nsCSSPseudoElements::Type mPseudoType;
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};
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struct AnonBoxRuleProcessorData {
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AnonBoxRuleProcessorData(nsPresContext* aPresContext,
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nsIAtom* aPseudoTag,
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nsRuleWalker* aRuleWalker)
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: mPresContext(aPresContext),
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mPseudoTag(aPseudoTag),
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mRuleWalker(aRuleWalker)
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{
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NS_PRECONDITION(mPresContext, "Must have prescontext");
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NS_PRECONDITION(aPseudoTag, "Must have pseudo tag");
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NS_PRECONDITION(aRuleWalker, "Must have rule walker");
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}
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nsPresContext* mPresContext;
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nsIAtom* mPseudoTag;
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nsRuleWalker* mRuleWalker;
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};
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#ifdef MOZ_XUL
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struct XULTreeRuleProcessorData : public RuleProcessorData {
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XULTreeRuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aParentElement,
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nsRuleWalker* aRuleWalker,
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nsIAtom* aPseudoTag,
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nsICSSPseudoComparator* aComparator)
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: RuleProcessorData(aPresContext, aParentElement, aRuleWalker),
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mPseudoTag(aPseudoTag),
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mComparator(aComparator)
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{
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NS_PRECONDITION(aPresContext, "null pointer");
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NS_PRECONDITION(aPseudoTag, "null pointer");
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NS_PRECONDITION(aRuleWalker, "null pointer");
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NS_PRECONDITION(aComparator, "must have a comparator");
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}
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nsIAtom* mPseudoTag;
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nsICSSPseudoComparator* mComparator;
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};
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#endif
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struct StateRuleProcessorData : public RuleProcessorData {
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StateRuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsEventStates aStateMask)
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: RuleProcessorData(aPresContext, aElement, nsnull),
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mStateMask(aStateMask)
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{
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NS_PRECONDITION(aPresContext, "null pointer");
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}
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const nsEventStates mStateMask; // |HasStateDependentStyle| for which state(s)?
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// Constants defined in nsEventStates.h .
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};
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struct AttributeRuleProcessorData : public RuleProcessorData {
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AttributeRuleProcessorData(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsIAtom* aAttribute,
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PRInt32 aModType,
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PRBool aAttrHasChanged)
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: RuleProcessorData(aPresContext, aElement, nsnull),
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mAttribute(aAttribute),
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mModType(aModType),
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mAttrHasChanged(aAttrHasChanged)
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{
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NS_PRECONDITION(aPresContext, "null pointer");
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}
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nsIAtom* mAttribute; // |HasAttributeDependentStyle| for which attribute?
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PRInt32 mModType; // The type of modification (see nsIDOMMutationEvent).
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PRBool mAttrHasChanged; // Whether the attribute has already changed.
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};
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#endif /* !defined(nsRuleProcessorData_h_) */
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