gecko-dev/layout/style/nsRuleData.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * 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
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 *
 * 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 Communicator client 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):
 *   Original Author: David W. Hyatt (hyatt@netscape.com)
 *
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/*
 * temporary (expanded) representation of property-value pairs used to
 * hold data from matched rules during style data computation.
 */

#ifndef nsRuleData_h_
#define nsRuleData_h_

#include "nsCSSProps.h"
#include "nsCSSStruct.h"
#include "nsStyleStructFwd.h"

class nsPresContext;
class nsStyleContext;
struct nsRuleData;

typedef void (*nsPostResolveFunc)(void* aStyleStruct, nsRuleData* aData);

struct nsRuleData
{
  PRUint32 mSIDs;
  PRPackedBool mCanStoreInRuleTree;
  PRPackedBool mIsImportantRule;
  PRUint8 mLevel; // an nsStyleSet::sheetType
  nsPresContext* mPresContext;
  nsStyleContext* mStyleContext;
  nsPostResolveFunc mPostResolveCallback;

  // Should always be stack-allocated! We don't own these structures!
  nsRuleDataFont* mFontData;
  nsRuleDataDisplay* mDisplayData;
  nsRuleDataMargin* mMarginData;
  nsRuleDataList* mListData;
  nsRuleDataPosition* mPositionData;
  nsRuleDataTable* mTableData;
  nsRuleDataColor* mColorData;
  nsRuleDataContent* mContentData;
  nsRuleDataText* mTextData;
  nsRuleDataUserInterface* mUserInterfaceData;
  nsRuleDataXUL* mXULData;
  nsRuleDataSVG* mSVGData;
  nsRuleDataColumn* mColumnData;

  nsRuleData(PRUint32 aSIDs,
             nsPresContext* aContext,
             nsStyleContext* aStyleContext)
    : mSIDs(aSIDs),
      mCanStoreInRuleTree(PR_TRUE),
      mPresContext(aContext),
      mStyleContext(aStyleContext),
      mPostResolveCallback(nsnull),
      mFontData(nsnull),
      mDisplayData(nsnull),
      mMarginData(nsnull),
      mListData(nsnull),
      mPositionData(nsnull),
      mTableData(nsnull),
      mColorData(nsnull),
      mContentData(nsnull),
      mTextData(nsnull),
      mUserInterfaceData(nsnull),
      mXULData(nsnull),
      mSVGData(nsnull),
      mColumnData(nsnull)
  {}
  ~nsRuleData() {}

  /**
   * Return a pointer to the value object within |this| corresponding
   * to property |aProperty|, or null if storage for that property has
   * not been allocated.
   */
  nsCSSValue* ValueFor(nsCSSProperty aProperty);
};

#endif