home *** CD-ROM | disk | FTP | other *** search
- /* -*- 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):
- *
- * 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 ***** */
- #ifndef nsIStyleRuleProcessor_h___
- #define nsIStyleRuleProcessor_h___
-
- #include <stdio.h>
-
- #include "nsISupports.h"
- #include "nsPresContext.h" // for nsCompatability
- #include "nsILinkHandler.h"
- #include "nsString.h"
- #include "nsChangeHint.h"
-
- class nsIStyleSheet;
- class nsPresContext;
- class nsIContent;
- class nsIStyledContent;
- class nsISupportsArray;
- class nsIAtom;
- class nsICSSPseudoComparator;
- class nsRuleWalker;
-
- // The implementation of the constructor and destructor are currently in
- // nsCSSStyleSheet.cpp.
-
- struct RuleProcessorData {
- RuleProcessorData(nsPresContext* aPresContext,
- nsIContent* aContent,
- nsRuleWalker* aRuleWalker,
- nsCompatibility* aCompat = nsnull);
-
- // NOTE: not |virtual|
- ~RuleProcessorData();
-
- void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
- return aContext->AllocateFromShell(sz);
- }
- void Destroy(nsPresContext* aContext) {
- this->~RuleProcessorData();
- aContext->FreeToShell(sizeof(RuleProcessorData), this);
- };
-
- const nsString* GetLang();
-
- nsPresContext* mPresContext;
- nsIContent* mContent; // weak ref
- nsIContent* mParentContent; // if content, content->GetParent(); weak ref
- nsRuleWalker* mRuleWalker; // Used to add rules to our results.
- nsIContent* mScopedRoot; // Root of scoped stylesheet (set and unset by the supplier of the scoped stylesheet
-
- nsIAtom* mContentTag; // if content, then content->GetTag()
- nsIAtom* mContentID; // if styled content, then weak reference to styledcontent->GetID()
- nsIStyledContent* mStyledContent; // if content, content->QI(nsIStyledContent)
- PRPackedBool mIsHTMLContent; // if content, then does QI on HTMLContent, true or false
- PRPackedBool mIsHTMLLink; // if content, calls nsStyleUtil::IsHTMLLink
- PRPackedBool mIsSimpleXLink; // if content, calls nsStyleUtil::IsSimpleXLink
- nsCompatibility mCompatMode; // Possibly remove use of this in SelectorMatches?
- PRPackedBool mHasAttributes; // if content, content->GetAttrCount() > 0
- nsLinkState mLinkState; // if a link, this is the state, otherwise unknown
- PRInt32 mEventState; // if content, eventStateMgr->GetContentState()
- PRInt32 mNameSpaceID; // if content, content->GetNameSapce()
- RuleProcessorData* mPreviousSiblingData;
- RuleProcessorData* mParentData;
-
- protected:
- nsAutoString *mLanguage; // NULL means we haven't found out the language yet
- };
-
- struct ElementRuleProcessorData : public RuleProcessorData {
- ElementRuleProcessorData(nsPresContext* aPresContext,
- nsIContent* aContent,
- nsRuleWalker* aRuleWalker)
- : RuleProcessorData(aPresContext,aContent,aRuleWalker)
- {
- NS_PRECONDITION(aContent, "null pointer");
- NS_PRECONDITION(aRuleWalker, "null pointer");
- }
- };
-
- struct PseudoRuleProcessorData : public RuleProcessorData {
- PseudoRuleProcessorData(nsPresContext* aPresContext,
- nsIContent* aParentContent,
- nsIAtom* aPseudoTag,
- nsICSSPseudoComparator* aComparator,
- nsRuleWalker* aRuleWalker)
- : RuleProcessorData(aPresContext, aParentContent, aRuleWalker)
- {
- NS_PRECONDITION(aPseudoTag, "null pointer");
- NS_PRECONDITION(aRuleWalker, "null pointer");
- mPseudoTag = aPseudoTag;
- mComparator = aComparator;
- }
-
- nsIAtom* mPseudoTag;
- nsICSSPseudoComparator* mComparator;
- };
-
- struct StateRuleProcessorData : public RuleProcessorData {
- StateRuleProcessorData(nsPresContext* aPresContext,
- nsIContent* aContent,
- PRInt32 aStateMask)
- : RuleProcessorData(aPresContext, aContent, nsnull),
- mStateMask(aStateMask)
- {
- NS_PRECONDITION(aContent, "null pointer");
- }
- const PRInt32 mStateMask; // |HasStateDependentStyle| for which state(s)?
- // Constants defined in nsIEventStateManager.h .
- };
-
- struct AttributeRuleProcessorData : public RuleProcessorData {
- AttributeRuleProcessorData(nsPresContext* aPresContext,
- nsIContent* aContent,
- nsIAtom* aAttribute,
- PRInt32 aModType)
- : RuleProcessorData(aPresContext, aContent, nsnull),
- mAttribute(aAttribute),
- mModType(aModType)
- {
- NS_PRECONDITION(aContent, "null pointer");
- }
- nsIAtom* mAttribute; // |HasAttributeDependentStyle| for which attribute?
- PRInt32 mModType; // The type of modification (see nsIDOMMutationEvent).
- };
-
-
- // IID for the nsIStyleRuleProcessor interface {015575fe-7b6c-11d3-ba05-001083023c2b}
- #define NS_ISTYLE_RULE_PROCESSOR_IID \
- {0x015575fe, 0x7b6c, 0x11d3, {0xba, 0x05, 0x00, 0x10, 0x83, 0x02, 0x3c, 0x2b}}
-
- /* The style rule processor interface is a mechanism to separate the matching
- * of style rules from style sheet instances.
- * Simple style sheets can and will act as their own processor.
- * Sheets where rule ordering interlaces between multiple sheets, will need to
- * share a single rule processor between them (CSS sheets do this for cascading order)
- *
- * @see nsIStyleRule (for significantly more detailed comments)
- */
- class nsIStyleRuleProcessor : public nsISupports {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISTYLE_RULE_PROCESSOR_IID)
-
- // Shorthand for:
- // nsCOMArray<nsIStyleRuleProcessor>::nsCOMArrayEnumFunc
- typedef PRBool (* PR_CALLBACK EnumFunc)(nsIStyleRuleProcessor*, void*);
-
- /**
- * Find the |nsIStyleRule|s matching the given content node and
- * position the given |nsRuleWalker| at the |nsRuleNode| in the rule
- * tree representing that ordered list of rules (with higher
- * precedence being farther from the root of the lexicographic tree).
- */
- NS_IMETHOD RulesMatching(ElementRuleProcessorData* aData) = 0;
-
- /**
- * Just like the previous |RulesMatching|, except for a given content
- * node <em>and pseudo-element</em>.
- */
- NS_IMETHOD RulesMatching(PseudoRuleProcessorData* aData) = 0;
-
- /**
- * Return how (as described by nsReStyleHint) style can depend on a
- * change of the given content state on the given content node. This
- * test is used for optimization only, and may err on the side of
- * reporting more dependencies than really exist.
- *
- * Event states are defined in nsIEventStateManager.h.
- */
- NS_IMETHOD HasStateDependentStyle(StateRuleProcessorData* aData,
- nsReStyleHint* aResult) = 0;
-
- /**
- * Return how (as described by nsReStyleHint) style can depend on the
- * presence or value of the given attribute for the given content
- * node. This test is used for optimization only, and may err on the
- * side of reporting more dependencies than really exist.
- */
- NS_IMETHOD HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
- nsReStyleHint* aResult) = 0;
- };
-
- #endif /* nsIStyleRuleProcessor_h___ */
-