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-rw-r--r--khtml/xml/dom_restyler.h102
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diff --git a/khtml/xml/dom_restyler.h b/khtml/xml/dom_restyler.h
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-/*
- * This file is part of the DOM implementation for KDE.
- *
- * Copyright (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef _DOM_restyler_h_
-#define _DOM_restyler_h_
-
-#include "misc/multimap.h"
-#include <bitset>
-
-namespace DOM {
- class ElementImpl;
-}
-
-// Restyle dependency tracker for dynamic DOM
-
-namespace khtml {
-
-using DOM::ElementImpl;
-
-// These types are different types of dependencies, and serves to identify which element should be
-// restyled when a change of that kind triggers on the element
-enum StructuralDependencyType {
- // Style relies on the children of the element (unaffected by append & close)
- StructuralDependency = 0,
- // Style relies on the last children of the element (affected by append & close)
- BackwardsStructuralDependency = 1,
- // Style relies on the element having hover
- HoverDependency = 2,
- // Style relies on the element being active
- ActiveDependency = 3,
- // Style relies on another state of element (focus, disabled, checked, etc.)
- // (focus is special cased though since elements always depend on their own focus)
- OtherStateDependency = 4,
- LastStructuralDependency
-};
-
-// Attribute dependencies are much coarser than structural, for memory reasons rather than performance
-// This tracks global depencies of various kinds.
-// The groups are separated into where possible depending elements might be:
-enum AttributeDependencyType {
- // Style of the changed element depend on this attribute
- PersonalDependency = 0,
- // Style of the elements children depend on this attribute
- AncestorDependency = 1,
- // Style of the elements later siblings or their children depend on this attribute
- PredecessorDependency = 2,
- LastAttributeDependency
-};
-
-
-/**
- * @internal
- */
-class DynamicDomRestyler {
-public:
- DynamicDomRestyler();
-
- // Structural dependencies are tracked from element to subject
- void addDependency(ElementImpl* subject, ElementImpl* dependency, StructuralDependencyType type);
- void resetDependencies(ElementImpl* subject);
- void removeDependency(ElementImpl* subject, ElementImpl* dependency, StructuralDependencyType type);
- void removeDependencies(ElementImpl* subject, StructuralDependencyType type);
- void restyleDepedent(ElementImpl* dependency, StructuralDependencyType type);
-
- // Attribute dependencies are traced on attribute alone
- void addDependency(uint attrID, AttributeDependencyType type);
- bool checkDependency(uint attrID, AttributeDependencyType type);
-
- void dumpStats() const;
-private:
- // Map of dependencies.
- KMultiMap<ElementImpl> dependency_map[LastStructuralDependency];
- // Map of reverse dependencies. For fast reset
- KMultiMap<ElementImpl> reverse_map;
-
- // Map of the various attribute dependencies
- std::bitset<512> attribute_map[LastAttributeDependency];
-};
-
-}
-
-#endif
-