mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 09:05:45 +00:00
295 lines
11 KiB
C++
295 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/*
|
|
* data structures passed to nsIStyleRuleProcessor methods (to pull loop
|
|
* invariant computations out of the loop)
|
|
*/
|
|
|
|
#ifndef nsRuleProcessorData_h_
|
|
#define nsRuleProcessorData_h_
|
|
|
|
#include "nsPresContext.h" // for nsCompatability
|
|
#include "nsString.h"
|
|
#include "nsChangeHint.h"
|
|
#include "nsIContent.h"
|
|
#include "nsCSSPseudoElements.h"
|
|
#include "nsRuleWalker.h"
|
|
#include "nsNthIndexCache.h"
|
|
|
|
class nsIStyleSheet;
|
|
class nsIAtom;
|
|
class nsICSSPseudoComparator;
|
|
class nsAttrValue;
|
|
|
|
/**
|
|
* A |TreeMatchContext| has data about a matching operation. The
|
|
* data are not node-specific but are invariants of the DOM tree the
|
|
* nodes being matched against are in.
|
|
*
|
|
* Most of the members are in parameters to selector matching. The
|
|
* one out parameter is mHaveRelevantLink. Consumers that use a
|
|
* TreeMatchContext for more than one matching operation need to reset
|
|
* mHaveRelevantLink if they care about the return value.
|
|
*/
|
|
struct TreeMatchContext {
|
|
// Is this matching operation for the creation of a style context?
|
|
// (If it is, we need to set slow selector bits on nodes indicating
|
|
// that certain restyling needs to happen.)
|
|
const PRBool mForStyling;
|
|
|
|
// Did this matching operation find a relevant link? (If so, we'll
|
|
// need to construct a StyleIfVisited.)
|
|
PRBool mHaveRelevantLink;
|
|
|
|
// How matching should be performed. See the documentation for
|
|
// nsRuleWalker::VisitedHandlingType.
|
|
nsRuleWalker::VisitedHandlingType mVisitedHandling;
|
|
|
|
// The document we're working with.
|
|
nsIDocument* const mDocument;
|
|
|
|
// Root of scoped stylesheet (set and unset by the supplier of the
|
|
// scoped stylesheet).
|
|
nsIContent* mScopedRoot;
|
|
|
|
// Whether our document is HTML (as opposed to XML of some sort,
|
|
// including XHTML).
|
|
// XXX XBL2 issue: Should we be caching this? What should it be for XBL2?
|
|
const PRPackedBool mIsHTMLDocument;
|
|
|
|
// Possibly remove use of mCompatMode in SelectorMatches?
|
|
// XXX XBL2 issue: Should we be caching this? What should it be for XBL2?
|
|
const nsCompatibility mCompatMode;
|
|
|
|
// The nth-index cache we should use
|
|
nsNthIndexCache mNthIndexCache;
|
|
|
|
TreeMatchContext(PRBool aForStyling,
|
|
nsRuleWalker::VisitedHandlingType aVisitedHandling,
|
|
nsIDocument* aDocument)
|
|
: mForStyling(aForStyling)
|
|
, mHaveRelevantLink(PR_FALSE)
|
|
, mVisitedHandling(aVisitedHandling)
|
|
, mDocument(aDocument)
|
|
, mScopedRoot(nsnull)
|
|
, mIsHTMLDocument(aDocument->IsHTML())
|
|
, mCompatMode(aDocument->GetCompatibilityMode())
|
|
{
|
|
}
|
|
};
|
|
|
|
// The implementation of the constructor and destructor are currently in
|
|
// nsCSSRuleProcessor.cpp.
|
|
|
|
struct RuleProcessorData : public TreeMatchContext {
|
|
RuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aElement,
|
|
nsRuleWalker* aRuleWalker,
|
|
PRBool aForStyling);
|
|
|
|
// NOTE: not |virtual|
|
|
~RuleProcessorData();
|
|
|
|
// This should be used for all heap-allocation of RuleProcessorData
|
|
static RuleProcessorData* Create(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aElement,
|
|
nsRuleWalker* aRuleWalker)
|
|
{
|
|
// Note: the mForStyling and mVisitedHandling members of data
|
|
// structs created this way aren't used, so it doesn't matter what
|
|
// we pass for aForStyling here.
|
|
if (NS_LIKELY(aPresContext)) {
|
|
return new (aPresContext) RuleProcessorData(aPresContext, aElement,
|
|
aRuleWalker, PR_FALSE);
|
|
}
|
|
|
|
return new RuleProcessorData(aPresContext, aElement, aRuleWalker, PR_FALSE);
|
|
}
|
|
|
|
void Destroy() {
|
|
nsPresContext * pc = mPresContext;
|
|
if (NS_LIKELY(pc)) {
|
|
this->~RuleProcessorData();
|
|
pc->FreeToShell(sizeof(RuleProcessorData), this);
|
|
return;
|
|
}
|
|
delete this;
|
|
}
|
|
|
|
// For placement new
|
|
void* operator new(size_t sz, RuleProcessorData* aSlot) CPP_THROW_NEW {
|
|
return aSlot;
|
|
}
|
|
private:
|
|
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
|
|
return aContext->AllocateFromShell(sz);
|
|
}
|
|
void* operator new(size_t sz) CPP_THROW_NEW {
|
|
return ::operator new(sz);
|
|
}
|
|
public:
|
|
// Reset this data for matching for the style-if-:visited. This should
|
|
// only be called for RuleProcessorData objects which have a rulewalker.
|
|
void ResetForVisitedMatching() {
|
|
mHaveRelevantLink = PR_FALSE;
|
|
mRuleWalker->ResetForVisitedMatching();
|
|
mVisitedHandling = mRuleWalker->VisitedHandling();
|
|
}
|
|
|
|
nsEventStates DocumentState();
|
|
|
|
nsPresContext* mPresContext;
|
|
mozilla::dom::Element* mElement; // weak ref, must not be null
|
|
nsIContent* mParentContent; // mElement->GetParent(); weak ref
|
|
nsRuleWalker* mRuleWalker; // Used to add rules to our results.
|
|
|
|
nsIAtom* mContentID; // mElement->GetID()
|
|
PRPackedBool mHasAttributes; // mElement->GetAttrCount() > 0
|
|
PRInt32 mNameSpaceID; // mElement->GetNameSapce()
|
|
const nsAttrValue* mClasses; // mElement->GetClasses()
|
|
// mPreviousSiblingData and mParentData are always RuleProcessorData
|
|
// and never a derived class. They are allocated lazily, when
|
|
// selectors require matching of prior siblings or ancestors.
|
|
RuleProcessorData* mPreviousSiblingData;
|
|
RuleProcessorData* mParentData;
|
|
};
|
|
|
|
struct ElementRuleProcessorData : public RuleProcessorData {
|
|
ElementRuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aElement,
|
|
nsRuleWalker* aRuleWalker,
|
|
PRBool aForStyling)
|
|
: RuleProcessorData(aPresContext, aElement, aRuleWalker, aForStyling)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "null pointer");
|
|
NS_PRECONDITION(aRuleWalker, "null pointer");
|
|
}
|
|
};
|
|
|
|
struct PseudoElementRuleProcessorData : public RuleProcessorData {
|
|
PseudoElementRuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aParentElement,
|
|
nsRuleWalker* aRuleWalker,
|
|
nsCSSPseudoElements::Type aPseudoType)
|
|
: RuleProcessorData(aPresContext, aParentElement, aRuleWalker, PR_TRUE),
|
|
mPseudoType(aPseudoType)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "null pointer");
|
|
NS_PRECONDITION(aPseudoType <
|
|
nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"null pointer");
|
|
NS_PRECONDITION(aRuleWalker, "null pointer");
|
|
}
|
|
|
|
nsCSSPseudoElements::Type mPseudoType;
|
|
};
|
|
|
|
struct AnonBoxRuleProcessorData {
|
|
AnonBoxRuleProcessorData(nsPresContext* aPresContext,
|
|
nsIAtom* aPseudoTag,
|
|
nsRuleWalker* aRuleWalker)
|
|
: mPresContext(aPresContext),
|
|
mPseudoTag(aPseudoTag),
|
|
mRuleWalker(aRuleWalker)
|
|
{
|
|
NS_PRECONDITION(mPresContext, "Must have prescontext");
|
|
NS_PRECONDITION(aPseudoTag, "Must have pseudo tag");
|
|
NS_PRECONDITION(aRuleWalker, "Must have rule walker");
|
|
}
|
|
|
|
nsPresContext* mPresContext;
|
|
nsIAtom* mPseudoTag;
|
|
nsRuleWalker* mRuleWalker;
|
|
};
|
|
|
|
#ifdef MOZ_XUL
|
|
struct XULTreeRuleProcessorData : public RuleProcessorData {
|
|
XULTreeRuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aParentElement,
|
|
nsRuleWalker* aRuleWalker,
|
|
nsIAtom* aPseudoTag,
|
|
nsICSSPseudoComparator* aComparator)
|
|
: RuleProcessorData(aPresContext, aParentElement, aRuleWalker, PR_TRUE),
|
|
mPseudoTag(aPseudoTag),
|
|
mComparator(aComparator)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "null pointer");
|
|
NS_PRECONDITION(aPseudoTag, "null pointer");
|
|
NS_PRECONDITION(aRuleWalker, "null pointer");
|
|
NS_PRECONDITION(aComparator, "must have a comparator");
|
|
}
|
|
|
|
nsIAtom* mPseudoTag;
|
|
nsICSSPseudoComparator* mComparator;
|
|
};
|
|
#endif
|
|
|
|
struct StateRuleProcessorData : public RuleProcessorData {
|
|
StateRuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aElement,
|
|
nsEventStates aStateMask)
|
|
: RuleProcessorData(aPresContext, aElement, nsnull, PR_FALSE),
|
|
mStateMask(aStateMask)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "null pointer");
|
|
}
|
|
const nsEventStates mStateMask; // |HasStateDependentStyle| for which state(s)?
|
|
// Constants defined in nsEventStates.h .
|
|
};
|
|
|
|
struct AttributeRuleProcessorData : public RuleProcessorData {
|
|
AttributeRuleProcessorData(nsPresContext* aPresContext,
|
|
mozilla::dom::Element* aElement,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType,
|
|
PRBool aAttrHasChanged)
|
|
: RuleProcessorData(aPresContext, aElement, nsnull, PR_FALSE),
|
|
mAttribute(aAttribute),
|
|
mModType(aModType),
|
|
mAttrHasChanged(aAttrHasChanged)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "null pointer");
|
|
}
|
|
nsIAtom* mAttribute; // |HasAttributeDependentStyle| for which attribute?
|
|
PRInt32 mModType; // The type of modification (see nsIDOMMutationEvent).
|
|
PRBool mAttrHasChanged; // Whether the attribute has already changed.
|
|
};
|
|
|
|
#endif /* !defined(nsRuleProcessorData_h_) */
|