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gecko/layout/style/nsICSSStyleRule.h

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/* -*- 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):
* Daniel Glazman <glazman@netscape.com>
* 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 ***** */
/*
* representation of CSS style rules (selectors+declaration) and CSS
* selectors
*/
#ifndef nsICSSStyleRule_h___
#define nsICSSStyleRule_h___
//#include <stdio.h>
#include "nsICSSRule.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsCSSValue.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSPseudoClasses.h"
class nsIAtom;
class nsCSSDeclaration;
class nsCSSStyleSheet;
struct nsCSSSelectorList;
struct nsAtomList {
public:
nsAtomList(nsIAtom* aAtom);
nsAtomList(const nsString& aAtomValue);
~nsAtomList(void);
/** Do a deep clone. Should be used only on the first in the linked list. */
nsAtomList* Clone() const { return Clone(PR_TRUE); }
nsCOMPtr<nsIAtom> mAtom;
nsAtomList* mNext;
private:
nsAtomList* Clone(PRBool aDeep) const;
// These are not supported and are not implemented!
nsAtomList(const nsAtomList& aCopy);
nsAtomList& operator=(const nsAtomList& aCopy);
};
struct nsPseudoClassList {
public:
nsPseudoClassList(nsIAtom* aAtom, nsCSSPseudoClasses::Type aType);
nsPseudoClassList(nsIAtom* aAtom, nsCSSPseudoClasses::Type aType,
const PRUnichar *aString);
nsPseudoClassList(nsIAtom* aAtom, nsCSSPseudoClasses::Type aType,
const PRInt32 *aIntPair);
nsPseudoClassList(nsIAtom* aAtom, nsCSSPseudoClasses::Type aType,
nsCSSSelectorList *aSelectorList /* takes ownership */);
~nsPseudoClassList(void);
/** Do a deep clone. Should be used only on the first in the linked list. */
nsPseudoClassList* Clone() const { return Clone(PR_TRUE); }
nsCOMPtr<nsIAtom> mAtom;
union {
// For a given value of mAtom, we have either:
// a. no value, which means mMemory is always null
// (if none of the conditions for (b), (c), or (d) is true)
// b. a string value, which means mString/mMemory is non-null
// (if nsCSSPseudoClasses::HasStringArg(mAtom))
// c. an integer pair value, which means mNumbers/mMemory is non-null
// (if nsCSSPseudoClasses::HasNthPairArg(mAtom))
// d. a selector list, which means mSelectors is non-null
// (if nsCSSPseudoClasses::HasSelectorListArg(mAtom))
void* mMemory; // mString and mNumbers use NS_Alloc/NS_Free
PRUnichar* mString;
PRInt32* mNumbers;
nsCSSSelectorList* mSelectors;
} u;
nsCSSPseudoClasses::Type mType;
nsPseudoClassList* mNext;
private:
nsPseudoClassList* Clone(PRBool aDeep) const;
// These are not supported and are not implemented!
nsPseudoClassList(const nsPseudoClassList& aCopy);
nsPseudoClassList& operator=(const nsPseudoClassList& aCopy);
};
#define NS_ATTR_FUNC_SET 0 // [attr]
#define NS_ATTR_FUNC_EQUALS 1 // [attr=value]
#define NS_ATTR_FUNC_INCLUDES 2 // [attr~=value] (space separated)
#define NS_ATTR_FUNC_DASHMATCH 3 // [attr|=value] ('-' truncated)
#define NS_ATTR_FUNC_BEGINSMATCH 4 // [attr^=value] (begins with)
#define NS_ATTR_FUNC_ENDSMATCH 5 // [attr$=value] (ends with)
#define NS_ATTR_FUNC_CONTAINSMATCH 6 // [attr*=value] (contains substring)
struct nsAttrSelector {
public:
nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr);
nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunction,
const nsString& aValue, PRBool aCaseSensitive);
nsAttrSelector(PRInt32 aNameSpace, nsIAtom* aLowercaseAttr,
nsIAtom* aCasedAttr, PRUint8 aFunction,
const nsString& aValue, PRBool aCaseSensitive);
~nsAttrSelector(void);
/** Do a deep clone. Should be used only on the first in the linked list. */
nsAttrSelector* Clone() const { return Clone(PR_TRUE); }
nsString mValue;
nsAttrSelector* mNext;
nsCOMPtr<nsIAtom> mLowercaseAttr;
nsCOMPtr<nsIAtom> mCasedAttr;
PRInt32 mNameSpace;
PRUint8 mFunction;
PRPackedBool mCaseSensitive; // If we are in an HTML document,
// is the value case sensitive?
private:
nsAttrSelector* Clone(PRBool aDeep) const;
// These are not supported and are not implemented!
nsAttrSelector(const nsAttrSelector& aCopy);
nsAttrSelector& operator=(const nsAttrSelector& aCopy);
};
struct nsCSSSelector {
public:
nsCSSSelector(void);
~nsCSSSelector(void);
/** Do a deep clone. Should be used only on the first in the linked list. */
nsCSSSelector* Clone() const { return Clone(PR_TRUE, PR_TRUE); }
void Reset(void);
void SetNameSpace(PRInt32 aNameSpace);
void SetTag(const nsString& aTag);
void AddID(const nsString& aID);
void AddClass(const nsString& aClass);
void AddPseudoClass(nsIAtom* aPseudoClass, nsCSSPseudoClasses::Type aType);
void AddPseudoClass(nsIAtom* aPseudoClass, nsCSSPseudoClasses::Type aType,
const PRUnichar* aString);
void AddPseudoClass(nsIAtom* aPseudoClass, nsCSSPseudoClasses::Type aType,
const PRInt32* aIntPair);
// takes ownership of aSelectorList
void AddPseudoClass(nsIAtom* aPseudoClass, nsCSSPseudoClasses::Type aType,
nsCSSSelectorList* aSelectorList);
void AddAttribute(PRInt32 aNameSpace, const nsString& aAttr);
void AddAttribute(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunc,
const nsString& aValue, PRBool aCaseSensitive);
void SetOperator(PRUnichar aOperator);
inline PRBool HasTagSelector() const {
return !!mCasedTag;
}
inline PRBool IsPseudoElement() const {
return mLowercaseTag && !mCasedTag;
}
// Calculate the specificity of this selector (not including its mNext!).
PRInt32 CalcWeight() const;
void ToString(nsAString& aString, nsCSSStyleSheet* aSheet,
PRBool aAppend = PR_FALSE) const;
private:
void AddPseudoClassInternal(nsPseudoClassList *aPseudoClass);
nsCSSSelector* Clone(PRBool aDeepNext, PRBool aDeepNegations) const;
void AppendToStringWithoutCombinators(nsAString& aString,
nsCSSStyleSheet* aSheet) const;
void AppendToStringWithoutCombinatorsOrNegations(nsAString& aString,
nsCSSStyleSheet* aSheet,
PRBool aIsNegated)
const;
// Returns true if this selector can have a namespace specified (which
// happens if and only if the default namespace would apply to this
// selector).
PRBool CanBeNamespaced(PRBool aIsNegated) const;
// Calculate the specificity of this selector (not including its mNext
// or its mNegations).
PRInt32 CalcWeightWithoutNegations() const;
public:
// Get and set the selector's pseudo type
nsCSSPseudoElements::Type PseudoType() const {
return static_cast<nsCSSPseudoElements::Type>(mPseudoType);
}
void SetPseudoType(nsCSSPseudoElements::Type aType) {
NS_ASSERTION(aType > PR_INT16_MIN && aType < PR_INT16_MAX, "Out of bounds");
mPseudoType = static_cast<PRInt16>(aType);
}
// For case-sensitive documents, mLowercaseTag is the same as mCasedTag,
// but in case-insensitive documents (HTML) mLowercaseTag is lowercase.
// Also, for pseudo-elements mCasedTag will be null but mLowercaseTag
// contains their name.
nsCOMPtr<nsIAtom> mLowercaseTag;
nsCOMPtr<nsIAtom> mCasedTag;
nsAtomList* mIDList;
nsAtomList* mClassList;
nsPseudoClassList* mPseudoClassList; // atom for the pseudo, string for
// the argument to functional pseudos
nsAttrSelector* mAttrList;
nsCSSSelector* mNegations;
nsCSSSelector* mNext;
PRInt32 mNameSpace;
PRUnichar mOperator;
private:
// PRInt16 to make sure it packs well with mOperator
PRInt16 mPseudoType;
// These are not supported and are not implemented!
nsCSSSelector(const nsCSSSelector& aCopy);
nsCSSSelector& operator=(const nsCSSSelector& aCopy);
};
/**
* A selector list is the unit of selectors that each style rule has.
* For example, "P B, H1 B { ... }" would be a selector list with two
* items (where each |nsCSSSelectorList| object's |mSelectors| has
* an |mNext| for the P or H1). We represent them as linked lists.
*/
struct nsCSSSelectorList {
nsCSSSelectorList(void);
~nsCSSSelectorList(void);
/**
* Create a new selector and push it onto the beginning of |mSelectors|,
* setting its |mNext| to the current value of |mSelectors|. If there is an
* earlier selector, set its |mOperator| to |aOperator|; else |aOperator|
* must be PRUnichar(0).
* Returns the new selector.
* The list owns the new selector.
* The caller is responsible for updating |mWeight|.
*/
nsCSSSelector* AddSelector(PRUnichar aOperator);
/**
* Should be used only on the first in the list
*/
void ToString(nsAString& aResult, nsCSSStyleSheet* aSheet);
/**
* Do a deep clone. Should be used only on the first in the list.
*/
nsCSSSelectorList* Clone() const { return Clone(PR_TRUE); }
nsCSSSelector* mSelectors;
PRInt32 mWeight;
nsCSSSelectorList* mNext;
private:
nsCSSSelectorList* Clone(PRBool aDeep) const;
// These are not supported and are not implemented!
nsCSSSelectorList(const nsCSSSelectorList& aCopy);
nsCSSSelectorList& operator=(const nsCSSSelectorList& aCopy);
};
// c6065b5e-4870-4dc5-9be3-747b6e317b25
#define NS_ICSS_STYLE_RULE_IID \
{ 0xc6065b5e, 0x4870, 0x4dc5, \
{ 0x9b, 0xe3, 0x74, 0x7b, 0x6e, 0x31, 0x7b, 0x25 } }
class nsICSSStyleRule : public nsICSSRule {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSS_STYLE_RULE_IID)
// null for style attribute
virtual nsCSSSelectorList* Selector(void) = 0;
virtual PRUint32 GetLineNumber(void) const = 0;
virtual void SetLineNumber(PRUint32 aLineNumber) = 0;
virtual nsCSSDeclaration* GetDeclaration(void) const = 0;
/**
* Return a new |nsIStyleRule| instance that replaces the current one,
* due to a change in the |nsCSSDeclaration|. Due to the
* |nsIStyleRule| contract of immutability, this must be called if the
* declaration is modified.
*
* |DeclarationChanged| handles replacing the object in the container
* sheet or group rule if |aHandleContainer| is true.
*/
virtual already_AddRefed<nsICSSStyleRule>
DeclarationChanged(PRBool aHandleContainer) = 0;
/**
* The rule processor must call this method before calling
* nsRuleWalker::Forward on this rule during rule matching.
*/
virtual void RuleMatched() = 0;
// hooks for DOM rule
virtual nsresult GetCssText(nsAString& aCssText) = 0;
virtual nsresult SetCssText(const nsAString& aCssText) = 0;
virtual nsresult GetParentStyleSheet(nsCSSStyleSheet** aSheet) = 0;
virtual nsresult GetParentRule(nsICSSGroupRule** aParentRule) = 0;
virtual nsresult GetSelectorText(nsAString& aSelectorText) = 0;
virtual nsresult SetSelectorText(const nsAString& aSelectorText) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSStyleRule, NS_ICSS_STYLE_RULE_IID)
nsresult
NS_NewCSSStyleRule(nsICSSStyleRule** aInstancePtrResult,
nsCSSSelectorList* aSelector,
nsCSSDeclaration* aDeclaration);
#endif /* nsICSSStyleRule_h___ */
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