зеркало из https://github.com/mozilla/gecko-dev.git
322 строки
13 KiB
C++
322 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape 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/NPL/
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
#ifndef nsStyleSet_h___
|
|
#define nsStyleSet_h___
|
|
|
|
#include <stdio.h>
|
|
#include "nsISupports.h"
|
|
#include "nslayout.h"
|
|
|
|
class nsIAtom;
|
|
class nsIStyleRule;
|
|
class nsIStyleSheet;
|
|
class nsIStyleContext;
|
|
class nsIStyleRuleSupplier;
|
|
class nsIPresContext;
|
|
class nsIContent;
|
|
class nsIFrame;
|
|
class nsIDocument;
|
|
class nsIFrameManager;
|
|
class nsISupportsArray;
|
|
struct nsFindFrameHint;
|
|
|
|
#include "nsVoidArray.h"
|
|
class nsISizeOfHandler;
|
|
|
|
#define SHARE_STYLECONTEXTS
|
|
|
|
#ifdef SHARE_STYLECONTEXTS
|
|
#include "nsHashtable.h"
|
|
#endif
|
|
|
|
// IID for the nsIStyleSet interface {e59396b0-b244-11d1-8031-006008159b5a}
|
|
#define NS_ISTYLE_SET_IID \
|
|
{0xe59396b0, 0xb244, 0x11d1, {0x80, 0x31, 0x00, 0x60, 0x08, 0x15, 0x9b, 0x5a}}
|
|
|
|
#ifdef SHARE_STYLECONTEXTS
|
|
typedef PRUint32 scKey; // key for style contexts: it is a CRC32 value actually...
|
|
#endif
|
|
|
|
class nsIStyleSet : public nsISupports {
|
|
public:
|
|
static const nsIID& GetIID() { static nsIID iid = NS_ISTYLE_SET_IID; return iid; }
|
|
|
|
// Style sheets are ordered, most significant first
|
|
// NOTE: this is the reverse of the way documents store the sheets
|
|
virtual void AppendOverrideStyleSheet(nsIStyleSheet* aSheet) = 0;
|
|
virtual void InsertOverrideStyleSheetAfter(nsIStyleSheet* aSheet,
|
|
nsIStyleSheet* aAfterSheet) = 0;
|
|
virtual void InsertOverrideStyleSheetBefore(nsIStyleSheet* aSheet,
|
|
nsIStyleSheet* aBeforeSheet) = 0;
|
|
virtual void RemoveOverrideStyleSheet(nsIStyleSheet* aSheet) = 0;
|
|
virtual PRInt32 GetNumberOfOverrideStyleSheets() = 0;
|
|
virtual nsIStyleSheet* GetOverrideStyleSheetAt(PRInt32 aIndex) = 0;
|
|
|
|
// the ordering of document style sheets is given by the document
|
|
virtual void AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument) = 0;
|
|
virtual void RemoveDocStyleSheet(nsIStyleSheet* aSheet) = 0;
|
|
virtual PRInt32 GetNumberOfDocStyleSheets() = 0;
|
|
virtual nsIStyleSheet* GetDocStyleSheetAt(PRInt32 aIndex) = 0;
|
|
|
|
virtual void AppendBackstopStyleSheet(nsIStyleSheet* aSheet) = 0;
|
|
virtual void InsertBackstopStyleSheetAfter(nsIStyleSheet* aSheet,
|
|
nsIStyleSheet* aAfterSheet) = 0;
|
|
virtual void InsertBackstopStyleSheetBefore(nsIStyleSheet* aSheet,
|
|
nsIStyleSheet* aBeforeSheet) = 0;
|
|
virtual void RemoveBackstopStyleSheet(nsIStyleSheet* aSheet) = 0;
|
|
virtual PRInt32 GetNumberOfBackstopStyleSheets() = 0;
|
|
virtual nsIStyleSheet* GetBackstopStyleSheetAt(PRInt32 aIndex) = 0;
|
|
virtual void ReplaceBackstopStyleSheets(nsISupportsArray* aNewSheets) = 0;
|
|
|
|
// enable / disable the Quirk style sheet:
|
|
// returns NS_FAILURE if none is found, otherwise NS_OK
|
|
NS_IMETHOD EnableQuirkStyleSheet(PRBool aEnable) = 0;
|
|
|
|
|
|
NS_IMETHOD NotifyStyleSheetStateChanged(PRBool aDisabled) = 0;
|
|
|
|
// get a style context for a non-pseudo frame
|
|
virtual nsIStyleContext* ResolveStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique = PR_FALSE) = 0;
|
|
|
|
// get a style context for a pseudo-frame (ie: tag = NS_NewAtom(":first-line");
|
|
virtual nsIStyleContext* ResolvePseudoStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique = PR_FALSE) = 0;
|
|
|
|
// This funtions just like ResolvePseudoStyleFor except that it will
|
|
// return nsnull if there are no explicit style rules for that
|
|
// pseudo element
|
|
virtual nsIStyleContext* ProbePseudoStyleFor(nsIPresContext* aPresContext,
|
|
nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsIStyleContext* aParentContext,
|
|
PRBool aForceUnique = PR_FALSE) = 0;
|
|
|
|
// Get a new style context that lives in a different parent
|
|
// The new context will be the same as the old if the new parent == the old parent
|
|
NS_IMETHOD ReParentStyleContext(nsIPresContext* aPresContext,
|
|
nsIStyleContext* aStyleContext,
|
|
nsIStyleContext* aNewParentContext,
|
|
nsIStyleContext** aNewStyleContext) = 0;
|
|
|
|
// Test if style is dependent on content state
|
|
NS_IMETHOD HasStateDependentStyle(nsIPresContext* aPresContext,
|
|
nsIContent* aContent) = 0;
|
|
|
|
// Create frames for the root content element and its child content
|
|
NS_IMETHOD ConstructRootFrame(nsIPresContext* aPresContext,
|
|
nsIContent* aDocElement,
|
|
nsIFrame*& aFrameSubTree) = 0;
|
|
|
|
// Causes reconstruction of a frame hierarchy rooted by the
|
|
// frame document element frame. This is often called when radical style
|
|
// change precludes incremental reflow.
|
|
NS_IMETHOD ReconstructDocElementHierarchy(nsIPresContext* aPresContext) = 0;
|
|
|
|
// Notifications of changes to the content mpodel
|
|
NS_IMETHOD ContentAppended(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
PRInt32 aNewIndexInContainer) = 0;
|
|
NS_IMETHOD ContentInserted(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer) = 0;
|
|
NS_IMETHOD ContentReplaced(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aOldChild,
|
|
nsIContent* aNewChild,
|
|
PRInt32 aIndexInContainer) = 0;
|
|
NS_IMETHOD ContentRemoved(nsIPresContext* aPresContext,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer) = 0;
|
|
|
|
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsISupports* aSubContent) = 0;
|
|
NS_IMETHOD ContentStatesChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aContent1,
|
|
nsIContent* aContent2) = 0;
|
|
NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aHint) = 0; // See nsStyleConsts fot hint values
|
|
|
|
// Style change notifications
|
|
NS_IMETHOD StyleRuleChanged(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule,
|
|
PRInt32 aHint) = 0; // See nsStyleConsts fot hint values
|
|
NS_IMETHOD StyleRuleAdded(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule) = 0;
|
|
NS_IMETHOD StyleRuleRemoved(nsIPresContext* aPresContext,
|
|
nsIStyleSheet* aStyleSheet,
|
|
nsIStyleRule* aStyleRule) = 0;
|
|
|
|
// Notification that we were unable to render a replaced element.
|
|
// Called when the replaced element can not be rendered, and we should
|
|
// instead render the element's contents.
|
|
// The content object associated with aFrame should either be a IMG
|
|
// element or an OBJECT element.
|
|
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame) = 0;
|
|
|
|
// Request to create a continuing frame
|
|
NS_IMETHOD CreateContinuingFrame(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
nsIFrame* aParentFrame,
|
|
nsIFrame** aContinuingFrame) = 0;
|
|
|
|
/** Request to find the primary frame associated with a given content object.
|
|
* This is typically called by the pres shell when there is no mapping in
|
|
* the pres shell hash table.
|
|
* @param aPresContext the pres context
|
|
* @param aFrameManager the frame manager
|
|
* @param aContent the content we need to find a frame for
|
|
* @param aFrame [OUT] the resulting frame
|
|
* @param aHint optional performance hint, may be null
|
|
*
|
|
* @return NS_OK. aFrame will be null if no frame could be found
|
|
*/
|
|
NS_IMETHOD FindPrimaryFrameFor(nsIPresContext* aPresContext,
|
|
nsIFrameManager* aFrameManager,
|
|
nsIContent* aContent,
|
|
nsIFrame** aFrame,
|
|
nsFindFrameHint* aHint=0) = 0;
|
|
|
|
// APIs for registering objects that can supply additional
|
|
// rules during processing.
|
|
NS_IMETHOD SetStyleRuleSupplier(nsIStyleRuleSupplier* aSupplier)=0;
|
|
NS_IMETHOD GetStyleRuleSupplier(nsIStyleRuleSupplier** aSupplier)=0;
|
|
|
|
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) = 0;
|
|
virtual void ListContexts(nsIStyleContext* aRootContext, FILE* out = stdout, PRInt32 aIndent = 0) = 0;
|
|
|
|
virtual void SizeOf(nsISizeOfHandler *aSizeofHandler, PRUint32 &aSize) = 0;
|
|
virtual void ResetUniqueStyleItems(void) = 0;
|
|
|
|
// If changing the given attribute cannot affect style context, aAffects
|
|
// will be PR_FALSE on return.
|
|
NS_IMETHOD AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
|
|
PRBool &aAffects) = 0;
|
|
|
|
#ifdef SHARE_STYLECONTEXTS
|
|
// add and remove from the cache of all contexts
|
|
NS_IMETHOD AddStyleContext(nsIStyleContext *aNewStyleContext) = 0;
|
|
NS_IMETHOD RemoveStyleContext(nsIStyleContext *aNewStyleContext) = 0;
|
|
// find another context with the same style data
|
|
// - if an exact match is found, the out-param aMatchingContext is set (AddRef'd)
|
|
NS_IMETHOD FindMatchingContext(nsIStyleContext *aStyleContextToMatch,
|
|
nsIStyleContext **aMatchingContext) = 0;
|
|
#endif
|
|
};
|
|
|
|
extern NS_LAYOUT nsresult
|
|
NS_NewStyleSet(nsIStyleSet** aInstancePtrResult);
|
|
|
|
|
|
class nsUniqueStyleItems : private nsVoidArray
|
|
{
|
|
public :
|
|
// return a singleton instance of the nsUniqueStyleItems object
|
|
static nsUniqueStyleItems *GetUniqueStyleItems( void ){
|
|
if(mInstance == nsnull){
|
|
#ifdef DEBUG
|
|
nsUniqueStyleItems *pInstance =
|
|
#endif
|
|
new nsUniqueStyleItems;
|
|
|
|
NS_ASSERTION(pInstance == mInstance, "Singleton?");
|
|
|
|
// the ctor sets the mInstance static member variable...
|
|
// if it is null, then we just end up returning null...
|
|
}
|
|
return mInstance;
|
|
}
|
|
|
|
void *GetItem(void *aPtr){
|
|
PRInt32 index = nsVoidArray::IndexOf(aPtr);
|
|
if( index != -1){
|
|
return nsVoidArray::ElementAt(index);
|
|
} else {
|
|
return nsnull;
|
|
}
|
|
}
|
|
|
|
PRBool AddItem(void *aPtr){
|
|
if(nsVoidArray::IndexOf(aPtr) == -1){
|
|
return nsVoidArray::AppendElement(aPtr);
|
|
} else {
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
PRBool RemoveItem(void *aPtr){
|
|
return nsVoidArray::RemoveElement(aPtr);
|
|
}
|
|
|
|
PRInt32 Count(void){
|
|
return nsVoidArray::Count();
|
|
}
|
|
|
|
void Clear(void){
|
|
nsVoidArray::Clear();
|
|
}
|
|
protected:
|
|
// disallow these:
|
|
nsUniqueStyleItems( const nsUniqueStyleItems& src);
|
|
nsUniqueStyleItems& operator =(const nsUniqueStyleItems& src);
|
|
|
|
// make this accessable to factory only
|
|
nsUniqueStyleItems(void) : nsVoidArray(){
|
|
NS_ASSERTION(mInstance == nsnull, "singleton?");
|
|
mInstance=this;
|
|
}
|
|
|
|
static nsUniqueStyleItems *mInstance;
|
|
};
|
|
|
|
#define UNIQUE_STYLE_ITEMS(__ptr) \
|
|
nsUniqueStyleItems* __ptr = nsUniqueStyleItems::GetUniqueStyleItems(); \
|
|
NS_ASSERTION(__ptr != nsnull, "UniqueItems cannot be null: error in nsUniqueStyleItems factory");
|
|
|
|
/** a simple struct (that may someday be expanded)
|
|
* that contains data supplied by the caller to help
|
|
* the style set find a frame for a content node
|
|
*/
|
|
struct nsFindFrameHint
|
|
{
|
|
nsIFrame *mPrimaryFrameForPrevSibling; // weak ref to the primary frame for the content for which we need a frame
|
|
nsFindFrameHint() {
|
|
mPrimaryFrameForPrevSibling = nsnull;
|
|
};
|
|
};
|
|
|
|
#endif /* nsIStyleSet_h___ */
|