forked from mirrors/gecko-dev
263 lines
9.9 KiB
C++
263 lines
9.9 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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* Daniel Glazman <glazman@netscape.com>
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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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* representation of a declaration block (or style attribute) in a CSS
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* stylesheet
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*/
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#ifndef nsCSSDeclaration_h___
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#define nsCSSDeclaration_h___
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#include "nsISupports.h"
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#include "nsColor.h"
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#include <stdio.h>
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#include "nsString.h"
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#include "nsCoord.h"
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#include "nsCSSValue.h"
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#include "nsCSSProps.h"
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#include "nsTArray.h"
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#include "nsCSSDataBlock.h"
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#include "nsCSSStruct.h"
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class nsCSSDeclaration {
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public:
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/**
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* Construct an |nsCSSDeclaration| that is in an invalid state (null
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* |mData|) and cannot be used until its |CompressFrom| method or
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* |InitializeEmpty| method is called.
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*/
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nsCSSDeclaration();
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nsCSSDeclaration(const nsCSSDeclaration& aCopy);
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/**
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* |ValueAppended| must be called to maintain this declaration's
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* |mOrder| whenever a property is parsed into an expanded data block
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* for this declaration.
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*/
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nsresult ValueAppended(nsCSSProperty aProperty);
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nsresult AppendComment(const nsAString& aComment);
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nsresult RemoveProperty(nsCSSProperty aProperty);
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nsresult GetValue(nsCSSProperty aProperty, nsAString& aValue) const;
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nsresult GetValue(const nsAString& aProperty, nsAString& aValue) const;
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PRBool HasImportantData() const { return mImportantData != nsnull; }
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PRBool GetValueIsImportant(nsCSSProperty aProperty) const;
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PRBool GetValueIsImportant(const nsAString& aProperty) const;
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PRUint32 Count() const {
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return mOrder.Length();
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}
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nsresult GetNthProperty(PRUint32 aIndex, nsAString& aReturn) const;
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nsresult ToString(nsAString& aString) const;
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nsCSSDeclaration* Clone() const;
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nsresult MapRuleInfoInto(nsRuleData *aRuleData) const {
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return mData->MapRuleInfoInto(aRuleData);
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}
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nsresult MapImportantRuleInfoInto(nsRuleData *aRuleData) const {
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return mImportantData->MapRuleInfoInto(aRuleData);
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}
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/**
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* Initialize this declaration as holding no data. Return false on
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* out-of-memory.
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*/
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PRBool InitializeEmpty();
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/**
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* Transfer all of the state from |aExpandedData| into this declaration.
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* After calling, |aExpandedData| should be in its initial state.
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*/
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void CompressFrom(nsCSSExpandedDataBlock *aExpandedData) {
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NS_ASSERTION(!mData, "oops");
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NS_ASSERTION(!mImportantData, "oops");
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aExpandedData->Compress(&mData, &mImportantData);
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}
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/**
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* Transfer all of the state from this declaration into
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* |aExpandedData| and put this declaration temporarily into an
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* invalid state (ended by |CompressFrom| or |InitializeEmpty|) that
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* should last only during parsing. During this time only
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* |ValueAppended| should be called.
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*/
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void ExpandTo(nsCSSExpandedDataBlock *aExpandedData) {
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aExpandedData->AssertInitialState();
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NS_ASSERTION(mData, "oops");
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aExpandedData->Expand(&mData, &mImportantData);
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NS_ASSERTION(!mData && !mImportantData,
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"Expand didn't null things out");
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}
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/**
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* Clear the data, in preparation for its replacement with entirely
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* new data by a call to |CompressFrom|.
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*/
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void ClearData() {
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mData->Destroy();
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mData = nsnull;
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if (mImportantData) {
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mImportantData->Destroy();
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mImportantData = nsnull;
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}
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mOrder.Clear();
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}
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#ifdef DEBUG
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void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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#endif
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private:
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// Not implemented, and not supported.
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nsCSSDeclaration& operator=(const nsCSSDeclaration& aCopy);
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PRBool operator==(const nsCSSDeclaration& aCopy) const;
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static void AppendImportanceToString(PRBool aIsImportant, nsAString& aString);
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// return whether there was a value in |aValue| (i.e., it had a non-null unit)
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PRBool AppendValueToString(nsCSSProperty aProperty, nsAString& aResult) const;
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// return whether there was a value in |aValue| (i.e., it had a non-null unit)
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static PRBool AppendCSSValueToString(nsCSSProperty aProperty,
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const nsCSSValue& aValue,
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nsAString& aResult);
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// May be called only for properties whose type is eCSSType_Value.
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nsresult GetValueOrImportantValue(nsCSSProperty aProperty, nsCSSValue& aValue) const;
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void PropertyIsSet(PRInt32 & aPropertyIndex, PRInt32 aIndex, PRUint32 & aSet, PRUint32 aValue) const;
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PRBool TryBorderShorthand(nsAString & aString, PRUint32 aPropertiesSet,
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PRInt32 aBorderTopWidth,
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PRInt32 aBorderTopStyle,
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PRInt32 aBorderTopColor,
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PRInt32 aBorderBottomWidth,
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PRInt32 aBorderBottomStyle,
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PRInt32 aBorderBottomColor,
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PRInt32 aBorderLeftWidth,
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PRInt32 aBorderLeftStyle,
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PRInt32 aBorderLeftColor,
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PRInt32 aBorderRightWidth,
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PRInt32 aBorderRightStyle,
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PRInt32 aBorderRightColor) const;
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PRBool TryBorderSideShorthand(nsAString & aString,
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nsCSSProperty aShorthand,
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PRInt32 aBorderWidth,
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PRInt32 aBorderStyle,
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PRInt32 aBorderColor) const;
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PRBool TryFourSidesShorthand(nsAString & aString,
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nsCSSProperty aShorthand,
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PRInt32 & aTop,
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PRInt32 & aBottom,
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PRInt32 & aLeft,
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PRInt32 & aRight,
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PRBool aClearIndexes) const;
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void TryBackgroundShorthand(nsAString & aString,
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PRInt32 & aBgColor, PRInt32 & aBgImage,
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PRInt32 & aBgRepeat, PRInt32 & aBgAttachment,
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PRInt32 & aBgPosition) const;
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void TryOverflowShorthand(nsAString & aString,
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PRInt32 & aOverflowX, PRInt32 & aOverflowY) const;
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#ifdef MOZ_SVG
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void TryMarkerShorthand(nsAString & aString,
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PRInt32 & aMarkerEnd,
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PRInt32 & aMarkerMid,
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PRInt32 & aMarkerStart) const;
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#endif
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PRBool AllPropertiesSameImportance(PRInt32 aFirst, PRInt32 aSecond,
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PRInt32 aThird, PRInt32 aFourth,
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PRInt32 aFifth,
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PRBool & aImportance) const;
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PRBool AllPropertiesSameValue(PRInt32 aFirst, PRInt32 aSecond,
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PRInt32 aThird, PRInt32 aFourth) const;
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void AppendPropertyAndValueToString(nsCSSProperty aProperty,
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nsAString& aResult) const
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{
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AppendPropertyAndValueToString(aProperty, aProperty, aResult);
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}
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void AppendPropertyAndValueToString(nsCSSProperty aProperty,
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nsCSSProperty aPropertyName,
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nsAString& aResult) const;
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private:
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//
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// Specialized ref counting.
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// We do not want everyone to ref count us, only the rules which hold
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// onto us (our well defined lifetime is when the last rule releases
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// us).
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// It's worth a comment here that the main nsCSSDeclaration is refcounted,
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// but it's |mImportant| is not refcounted, but just owned by the
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// non-important declaration.
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//
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friend class CSSStyleRuleImpl;
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void AddRef(void) {
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++mRefCnt;
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}
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void Release(void) {
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NS_ASSERTION(0 < mRefCnt, "bad Release");
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if (0 == --mRefCnt) {
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delete this;
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}
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}
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public:
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void RuleAbort(void) {
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NS_ASSERTION(0 == mRefCnt, "bad RuleAbort");
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delete this;
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}
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private:
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// Block everyone, except us or a derivative, from deleting us.
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~nsCSSDeclaration(void);
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nsCSSProperty OrderValueAt(PRUint32 aValue) const {
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return nsCSSProperty(mOrder.ElementAt(aValue));
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}
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private:
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nsAutoTArray<PRUint8, 8> mOrder;
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nsAutoRefCnt mRefCnt;
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nsCSSCompressedDataBlock *mData; // never null, except while expanded
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nsCSSCompressedDataBlock *mImportantData; // may be null
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};
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#endif /* nsCSSDeclaration_h___ */
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