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Mozilla/mozilla/layout/base/nsFrameManager.cpp
dbaron%fas.harvard.edu 8b3489a026 Bug 86947: 
Make the line list doubly linked and access it through a list class and iterators.
Stop recomputing margins on all of the children of each block in the reflow chain (which causes O(N^2) state recovery during incremental reflow).  Instead, add a second dirty bit to the lines and walk backwards through the line list to recompute vertical margins only when either dirty bit is set and the previous line was not reflowed.  Add nsIFrame::IsEmpty to identify frames through which margins collapse.
Fix O(N^2) propagation of float damage by maintaining a set of intervals damaged by floats (bug 61962) and be sure to damage the correct areas (bug 48138).
Introduce nsCollapsingMargin to do correct collapsing of combinations of positive and negative margins (bug 50142).
Clean up some odds and ends and fix another smaller O(N^2) problem in nsBlockFrame::AddFrames.
r=attinasi, rbs  sr=waterson


git-svn-id: svn://10.0.0.236/trunk@106224 18797224-902f-48f8-a5cc-f745e15eee43
2001-10-25 01:08:40 +00:00

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/* -*- 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):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#include "nscore.h"
#include "nsIFrameManager.h"
#include "nsIFrame.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIStyleSet.h"
#include "nsIStyleContext.h"
#include "nsStyleChangeList.h"
#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include "nsCOMPtr.h"
#include "prthread.h"
#include "plhash.h"
#include "nsDST.h"
#include "nsPlaceholderFrame.h"
#include "nsLayoutAtoms.h"
#include "nsHTMLAtoms.h"
#ifdef NS_DEBUG
#include "nsISupportsArray.h"
#include "nsIStyleRule.h"
#endif
#include "nsILayoutHistoryState.h"
#include "nsIStatefulFrame.h"
#include "nsIPresState.h"
#include "nsIContent.h"
#include "nsINameSpaceManager.h"
#include "nsIXMLContent.h"
#include "nsIDocument.h"
#include "nsIBindingManager.h"
#include "nsIScrollableFrame.h"
#include "nsIHTMLDocument.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIFormControl.h"
#include "nsIDOMElement.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIForm.h"
#include "nsIContentList.h"
#include "nsReadableUtils.h"
#define NEW_CONTEXT_PARENTAGE_INVARIANT
#ifdef NEW_CONTEXT_PARENTAGE_INVARIANT
#ifdef DEBUG
#undef NOISY_DEBUG
#else
#undef NOISY_DEBUG
#endif
#ifdef NOISY_DEBUG
#define NOISY_TRACE(_msg) \
printf("%s",_msg);
#define NOISY_TRACE_FRAME(_msg,_frame) \
printf("%s ",_msg); nsFrame::ListTag(stdout,_frame); printf("\n");
#else
#define NOISY_TRACE(_msg);
#define NOISY_TRACE_FRAME(_msg,_frame);
#endif
#endif // NEW_CONTEXT_PARENTAGE_INVARIANT
// Class IID's
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
// IID's
//----------------------------------------------------------------------
// Thin veneer around an NSPR hash table. Provides a map from a key that's
// a pointer to a value that's also a pointer.
class FrameHashTable {
public:
FrameHashTable(PRUint32 aNumBuckets = 16);
~FrameHashTable();
// Gets the value associated with the specified key
void* Get(void* aKey);
// Creates an association between the key and value. Returns the previous
// value associated with the key, or NULL if there was none
void* Put(void* aKey, void* aValue);
// Removes association for the key, and returns its associated value
void* Remove(void* aKey);
// Removes all entries from the hash table
void Clear();
#ifdef NS_DEBUG
void Dump(FILE* fp);
#endif
protected:
PLHashTable* mTable;
};
MOZ_DECL_CTOR_COUNTER(UndisplayedNode)
class UndisplayedNode {
public:
UndisplayedNode(nsIContent* aContent, nsIStyleContext* aStyle)
{
MOZ_COUNT_CTOR(UndisplayedNode);
mContent = aContent;
mStyle = aStyle;
NS_ADDREF(mStyle);
mNext = nsnull;
}
UndisplayedNode(nsIStyleContext* aPseudoStyle)
{
MOZ_COUNT_CTOR(UndisplayedNode);
mContent = nsnull;
mStyle = aPseudoStyle;
NS_ADDREF(mStyle);
mNext = nsnull;
}
~UndisplayedNode(void)
{
MOZ_COUNT_DTOR(UndisplayedNode);
NS_RELEASE(mStyle);
if (mNext) {
delete mNext;
}
}
nsIContent* mContent;
nsIStyleContext* mStyle;
UndisplayedNode* mNext;
};
class UndisplayedMap {
public:
UndisplayedMap(PRUint32 aNumBuckets = 16);
~UndisplayedMap(void);
UndisplayedNode* GetFirstNode(nsIContent* aParentContent);
nsresult AddNodeFor(nsIContent* aParentContent, nsIContent* aChild, nsIStyleContext* aStyle);
nsresult AddNodeFor(nsIContent* aParentContent, nsIStyleContext* aPseudoStyle);
nsresult RemoveNodeFor(nsIContent* aParentContent, UndisplayedNode* aNode);
nsresult RemoveNodesFor(nsIContent* aParentContent);
nsresult GetNodeFor(nsIContent* aContent, nsIStyleContext** aResult);
// Removes all entries from the hash table
void Clear(void);
protected:
PLHashEntry** GetEntryFor(nsIContent* aParentContent);
nsresult AppendNodeFor(UndisplayedNode* aNode, nsIContent* aParentContent);
PLHashTable* mTable;
PLHashEntry** mLastLookup;
};
//----------------------------------------------------------------------
class FrameManager;
// A CantRenderReplacedElementEvent has a weak pointer to the frame
// manager, and the frame manager has a weak pointer to the event.
// The event queue owns the event and the FrameManager will delete
// the event if it's going to go away.
struct CantRenderReplacedElementEvent : public PLEvent {
CantRenderReplacedElementEvent(FrameManager* aFrameManager, nsIFrame* aFrame);
nsIFrame* mFrame; // the frame that can't be rendered
CantRenderReplacedElementEvent* mNext; // next event in the list
};
class FrameManager : public nsIFrameManager
{
public:
FrameManager();
virtual ~FrameManager();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports
NS_DECL_ISUPPORTS
// nsIFrameManager
NS_IMETHOD Init(nsIPresShell* aPresShell, nsIStyleSet* aStyleSet);
NS_IMETHOD Destroy();
// Gets and sets the root frame
NS_IMETHOD GetRootFrame(nsIFrame** aRootFrame) const;
NS_IMETHOD SetRootFrame(nsIFrame* aRootFrame);
// Get the canvas frame: searches from the Root frame down, may be null
NS_IMETHOD GetCanvasFrame(nsIPresContext* aPresContext, nsIFrame** aCanvasFrame) const;
// Primary frame functions
NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent, nsIFrame** aPrimaryFrame);
NS_IMETHOD SetPrimaryFrameFor(nsIContent* aContent,
nsIFrame* aPrimaryFrame);
NS_IMETHOD ClearPrimaryFrameMap();
// Placeholder frame functions
NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aPlaceholderFrame) const;
NS_IMETHOD SetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame* aPlaceholderFrame);
NS_IMETHOD ClearPlaceholderFrameMap();
// Undisplayed content functions
NS_IMETHOD GetUndisplayedContent(nsIContent* aContent, nsIStyleContext** aStyleContext);
NS_IMETHOD SetUndisplayedContent(nsIContent* aContent, nsIStyleContext* aStyleContext);
NS_IMETHOD SetUndisplayedPseudoIn(nsIStyleContext* aPseudoContext,
nsIContent* aParentContent);
NS_IMETHOD ClearUndisplayedContentIn(nsIContent* aContent, nsIContent* aParentContent);
NS_IMETHOD ClearAllUndisplayedContentIn(nsIContent* aParentContent);
NS_IMETHOD ClearUndisplayedContentMap();
// Functions for manipulating the frame model
NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame);
NS_IMETHOD ReParentStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aNewParentContext);
NS_IMETHOD ComputeStyleChangeFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aTopLevelChange);
NS_IMETHOD AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
PRBool &aAffects);
// Capture state from the entire frame heirarchy and store in aState
NS_IMETHOD CaptureFrameState(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState);
NS_IMETHOD RestoreFrameState(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState);
// Add/restore state for one frame (special, global type, like scroll position)
NS_IMETHOD CaptureFrameStateFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState,
nsIStatefulFrame::SpecialStateID aID = nsIStatefulFrame::eNoID);
NS_IMETHOD RestoreFrameStateFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState,
nsIStatefulFrame::SpecialStateID aID = nsIStatefulFrame::eNoID);
NS_IMETHOD GenerateStateKey(nsIContent* aContent,
nsIStatefulFrame::SpecialStateID aID,
nsCString& aString);
// Gets and sets properties on a given frame
NS_IMETHOD GetFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName,
PRUint32 aOptions,
void** aPropertyValue);
NS_IMETHOD SetFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName,
void* aPropertyValue,
NSFMPropertyDtorFunc aPropDtorFunc);
NS_IMETHOD RemoveFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName);
#ifdef NS_DEBUG
NS_IMETHOD DebugVerifyStyleTree(nsIPresContext* aPresContext, nsIFrame* aFrame);
#endif
private:
struct PropertyList {
nsCOMPtr<nsIAtom> mName; // property name
nsDST* mFrameValueMap; // map of frame/value pairs
NSFMPropertyDtorFunc mDtorFunc; // property specific value dtor function
PropertyList* mNext;
PropertyList(nsIAtom* aName,
NSFMPropertyDtorFunc aDtorFunc,
nsDST::NodeArena* aDSTNodeArena);
~PropertyList();
// Removes the property associated with the given frame, and destroys
// the property value
PRBool RemovePropertyForFrame(nsIPresContext* aPresContext, nsIFrame* aFrame);
// Remove and destroy all remaining properties
void RemoveAllProperties(nsIPresContext* aPresContext);
};
nsIPresShell* mPresShell; // weak link, because the pres shell owns us
nsIStyleSet* mStyleSet; // weak link. pres shell holds a reference
nsIFrame* mRootFrame;
nsDST::NodeArena* mDSTNodeArena; // weak link. DST owns
nsDST* mPrimaryFrameMap;
FrameHashTable* mPlaceholderMap;
UndisplayedMap* mUndisplayedMap;
CantRenderReplacedElementEvent* mPostedEvents;
PropertyList* mPropertyList;
nsCOMPtr<nsIContentList> mHTMLForms;
nsCOMPtr<nsIContentList> mHTMLFormControls;
void ReResolveStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aParentContext,
nsIContent* aParentContent,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aResultChange);
nsresult RevokePostedEvents();
CantRenderReplacedElementEvent** FindPostedEventFor(nsIFrame* aFrame);
void DequeuePostedEventFor(nsIFrame* aFrame);
void DestroyPropertyList(nsIPresContext* aPresContext);
PropertyList* GetPropertyListFor(nsIAtom* aPropertyName) const;
void RemoveAllPropertiesFor(nsIPresContext* aPresContext, nsIFrame* aFrame);
friend struct CantRenderReplacedElementEvent;
static void HandlePLEvent(CantRenderReplacedElementEvent* aEvent);
static void DestroyPLEvent(CantRenderReplacedElementEvent* aEvent);
};
//----------------------------------------------------------------------
NS_EXPORT nsresult
NS_NewFrameManager(nsIFrameManager** aInstancePtrResult)
{
NS_ENSURE_ARG_POINTER(aInstancePtrResult);
if (!aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
FrameManager* it = new FrameManager;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIFrameManager), (void **)aInstancePtrResult);
}
FrameManager::FrameManager()
{
NS_INIT_REFCNT();
}
FrameManager::~FrameManager()
{
NS_ASSERTION(!mPresShell, "FrameManager::Destroy never called");
}
NS_IMPL_ISUPPORTS1(FrameManager, nsIFrameManager)
NS_IMETHODIMP
FrameManager::Init(nsIPresShell* aPresShell,
nsIStyleSet* aStyleSet)
{
NS_ASSERTION(aPresShell, "null aPresShell");
NS_ASSERTION(aStyleSet, "null aStyleSet");
mPresShell = aPresShell;
mStyleSet = aStyleSet;
// Allocate the node arena that's shared by all the DST objects
mDSTNodeArena = nsDST::NewMemoryArena();
if (!mDSTNodeArena) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Force the forms and form control content lists to be added as
// document observers *before* us (pres shell) so they will be
// up to date when we try to use them.
nsCOMPtr<nsIDocument> document;
mPresShell->GetDocument(getter_AddRefs(document));
nsCOMPtr<nsIHTMLDocument> htmlDocument(do_QueryInterface(document));
nsCOMPtr<nsIDOMHTMLDocument> domHtmlDocument(do_QueryInterface(htmlDocument));
if (domHtmlDocument) {
nsCOMPtr<nsIDOMHTMLCollection> forms;
domHtmlDocument->GetForms(getter_AddRefs(forms));
mHTMLForms = do_QueryInterface(forms);
nsCOMPtr<nsIDOMNodeList> formControls;
htmlDocument->GetFormControlElements(getter_AddRefs(formControls));
mHTMLFormControls = do_QueryInterface(formControls);
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::Destroy()
{
NS_ASSERTION(mPresShell, "Frame manager already shut down.");
nsCOMPtr<nsIPresContext> presContext;
mPresShell->GetPresContext(getter_AddRefs(presContext));
// Destroy the frame hierarchy. Don't destroy the property lists until after
// we've destroyed the frame hierarchy because some frames may expect to be
// able to retrieve their properties during destruction
if (mRootFrame) {
mRootFrame->Destroy(presContext);
mRootFrame = nsnull;
}
delete mPrimaryFrameMap;
delete mPlaceholderMap;
delete mUndisplayedMap;
DestroyPropertyList(presContext);
// If we're not going to be used anymore, we should revoke the
// pending |CantRenderReplacedElementEvent|s being sent to us.
nsresult rv = RevokePostedEvents();
NS_ASSERTION(NS_SUCCEEDED(rv), "RevokePostedEvents failed: might crash");
mPresShell = nsnull; // mPresShell isn't valid anymore. We
// won't use it, either, but we check it
// at the start of every function so that we'll
// be OK when nsIPresShell is converted to IDL.
return rv;
}
NS_IMETHODIMP
FrameManager::GetRootFrame(nsIFrame** aRootFrame) const
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aRootFrame);
*aRootFrame = mRootFrame;
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetRootFrame(nsIFrame* aRootFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_PRECONDITION(!mRootFrame, "already have a root frame");
if (mRootFrame) {
return NS_ERROR_UNEXPECTED;
}
mRootFrame = aRootFrame;
return NS_OK;
}
NS_IMETHODIMP
FrameManager::GetCanvasFrame(nsIPresContext* aPresContext, nsIFrame** aCanvasFrame) const
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_PRECONDITION(aCanvasFrame, "aCanvasFrame argument cannot be null");
NS_PRECONDITION(aPresContext, "aPresContext argument cannot be null");
*aCanvasFrame = nsnull;
if (mRootFrame) {
// walk the children of the root frame looking for a frame with type==canvas
// start at the root
nsIFrame* childFrame = mRootFrame;
while (childFrame) {
// get each sibling of the child and check them, startig at the child
nsIFrame *siblingFrame = childFrame;
while (siblingFrame) {
nsCOMPtr<nsIAtom> frameType;
siblingFrame->GetFrameType(getter_AddRefs(frameType));
if (frameType.get() == nsLayoutAtoms::canvasFrame) {
// this is it: set the out-arg and stop looking
*aCanvasFrame = siblingFrame;
break;
} else {
siblingFrame->GetNextSibling(&siblingFrame);
}
}
// move on to the child's child
childFrame->FirstChild(aPresContext, nsnull, &childFrame);
}
}
return NS_OK;
}
//----------------------------------------------------------------------
// Primary frame functions
NS_IMETHODIMP
FrameManager::GetPrimaryFrameFor(nsIContent* aContent, nsIFrame** aResult)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aResult);
NS_ENSURE_ARG_POINTER(aContent);
if (!aContent || !aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull; // initialize out param
nsresult rv;
if (mPrimaryFrameMap) {
mPrimaryFrameMap->Search(aContent, 0, (void**)aResult);
if (!*aResult) {
// XXX: todo: Add a lookup into the undisplay map to skip searches
// if we already know the content has no frame.
// nsCSSFrameConstructor calls SetUndisplayedContent() for every
// content node that has display: none.
// Today, the undisplay map doesn't quite support what we need.
// We need to see if we can add a method to make a search for aContent
// very fast in the embedded hash table.
// This would almost completely remove the lookup penalty for things
// like <SCRIPT> and comments in very large documents.
nsCOMPtr<nsIStyleSet> styleSet;
nsCOMPtr<nsIPresContext> presContext;
// Give the frame construction code the opportunity to return the
// frame that maps the content object
mPresShell->GetStyleSet(getter_AddRefs(styleSet));
NS_ASSERTION(styleSet, "bad style set");
mPresShell->GetPresContext(getter_AddRefs(presContext));
NS_ASSERTION(presContext, "bad presContext");
if (!styleSet || !presContext) {
return NS_ERROR_NULL_POINTER;
}
// if the prev sibling of aContent has a cached primary frame,
// pass that data in to the style set to speed things up
// if any methods in here fail, don't report that failure
// we're just trying to enhance performance here, not test for correctness
nsFindFrameHint hint;
nsCOMPtr<nsIContent> prevSibling, parent;
rv = aContent->GetParent(*getter_AddRefs(parent));
if (NS_SUCCEEDED(rv) && parent)
{
PRInt32 index;
rv = parent->IndexOf(aContent, index);
if (NS_SUCCEEDED(rv) && index>0) // no use looking if it's the first child
{
rv = parent->ChildAt(index-1, *getter_AddRefs(prevSibling));
if (NS_SUCCEEDED(rv) && prevSibling)
{
mPrimaryFrameMap->Search(prevSibling.get(), 0, (void**)&hint.mPrimaryFrameForPrevSibling);
}
}
}
// walk the frame tree to find the frame that maps aContent.
// Use the hint if we have it.
styleSet->FindPrimaryFrameFor(presContext, this, aContent, aResult,
hint.mPrimaryFrameForPrevSibling ? &hint : nsnull);
}
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetPrimaryFrameFor(nsIContent* aContent,
nsIFrame* aPrimaryFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aContent);
// it's ok if aPrimaryFrame is null
// If aPrimaryFrame is NULL, then remove the mapping
if (!aPrimaryFrame) {
if (mPrimaryFrameMap) {
mPrimaryFrameMap->Remove(aContent);
}
} else {
// Create a new DST if necessary
if (!mPrimaryFrameMap) {
mPrimaryFrameMap = new nsDST(mDSTNodeArena);
if (!mPrimaryFrameMap) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
// Add a mapping to the hash table
mPrimaryFrameMap->Insert(aContent, (void*)aPrimaryFrame, nsnull);
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::ClearPrimaryFrameMap()
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (mPrimaryFrameMap) {
mPrimaryFrameMap->Clear();
}
return NS_OK;
}
// Placeholder frame functions
NS_IMETHODIMP
FrameManager::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aResult);
NS_ENSURE_ARG_POINTER(aFrame);
if (!aResult || !aFrame) {
return NS_ERROR_NULL_POINTER;
}
if (mPlaceholderMap) {
*aResult = (nsIFrame*)mPlaceholderMap->Get(aFrame);
} else {
*aResult = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame* aPlaceholderFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aFrame);
#ifdef NS_DEBUG
// Verify that the placeholder frame is of the correct type
if (aPlaceholderFrame) {
nsIAtom* frameType;
aPlaceholderFrame->GetFrameType(&frameType);
NS_PRECONDITION(nsLayoutAtoms::placeholderFrame == frameType, "unexpected frame type");
NS_IF_RELEASE(frameType);
}
#endif
// If aPlaceholderFrame is NULL, then remove the mapping
if (!aPlaceholderFrame) {
if (mPlaceholderMap) {
mPlaceholderMap->Remove(aFrame);
}
} else {
// Create a new hash table if necessary
if (!mPlaceholderMap) {
mPlaceholderMap = new FrameHashTable;
if (!mPlaceholderMap) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
// Add a mapping to the hash table
mPlaceholderMap->Put(aFrame, (void*)aPlaceholderFrame);
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::ClearPlaceholderFrameMap()
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (mPlaceholderMap) {
mPlaceholderMap->Clear();
}
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::GetUndisplayedContent(nsIContent* aContent, nsIStyleContext** aResult)
{
if (!aContent || !aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull; // initialize out param
if (mUndisplayedMap)
mUndisplayedMap->GetNodeFor(aContent, aResult);
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetUndisplayedContent(nsIContent* aContent,
nsIStyleContext* aStyleContext)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (! mUndisplayedMap) {
mUndisplayedMap = new UndisplayedMap;
}
if (mUndisplayedMap) {
nsresult result = NS_OK;
nsIContent* parent = nsnull;
aContent->GetParent(parent);
if (parent) {
result = mUndisplayedMap->AddNodeFor(parent, aContent, aStyleContext);
NS_RELEASE(parent);
}
return result;
}
return NS_ERROR_OUT_OF_MEMORY;
}
NS_IMETHODIMP
FrameManager::SetUndisplayedPseudoIn(nsIStyleContext* aPseudoContext,
nsIContent* aParentContent)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (! mUndisplayedMap) {
mUndisplayedMap = new UndisplayedMap;
}
if (mUndisplayedMap) {
return mUndisplayedMap->AddNodeFor(aParentContent, aPseudoContext);
}
return NS_ERROR_OUT_OF_MEMORY;
}
NS_IMETHODIMP
FrameManager::ClearUndisplayedContentIn(nsIContent* aContent, nsIContent* aParentContent)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (mUndisplayedMap) {
UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aParentContent);
while (node) {
if (node->mContent == aContent) {
return mUndisplayedMap->RemoveNodeFor(aParentContent, node);
}
node = node->mNext;
}
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::ClearAllUndisplayedContentIn(nsIContent* aParentContent)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (mUndisplayedMap) {
return mUndisplayedMap->RemoveNodesFor(aParentContent);
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::ClearUndisplayedContentMap()
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (mUndisplayedMap) {
mUndisplayedMap->Clear();
}
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
return aParentFrame->AppendFrames(aPresContext, aPresShell, aListName,
aFrameList);
}
NS_IMETHODIMP
FrameManager::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
#ifdef IBMBIDI
if (aPrevFrame) {
// Insert aFrameList after the last bidi continuation of aPrevFrame.
nsIFrame* nextBidi;
for (; ;) {
GetFrameProperty(aPrevFrame, nsLayoutAtoms::nextBidi, 0, (void**) &nextBidi);
if (!nextBidi) {
break;
}
aPrevFrame = nextBidi;
}
}
#endif // IBMBIDI
return aParentFrame->InsertFrames(aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
NS_IMETHODIMP
FrameManager::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
#ifdef IBMBIDI
// Don't let the parent remove next bidi. In the other cases the it should NOT be removed.
nsIFrame* nextBidi;
GetFrameProperty(aOldFrame, nsLayoutAtoms::nextBidi, 0, (void**) &nextBidi);
if (nextBidi) {
RemoveFrame(aPresContext, aPresShell, aParentFrame, aListName, nextBidi);
}
#endif // IBMBIDI
return aParentFrame->RemoveFrame(aPresContext, aPresShell, aListName,
aOldFrame);
}
NS_IMETHODIMP
FrameManager::ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
return aParentFrame->ReplaceFrame(aPresContext, aPresShell, aListName,
aOldFrame, aNewFrame);
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::NotifyDestroyingFrame(nsIFrame* aFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
// Dequeue and destroy and posted events for this frame
DequeuePostedEventFor(aFrame);
// Remove all properties associated with the frame
nsCOMPtr<nsIPresContext> presContext;
mPresShell->GetPresContext(getter_AddRefs(presContext));
RemoveAllPropertiesFor(presContext, aFrame);
return NS_OK;
}
nsresult
FrameManager::RevokePostedEvents()
{
nsresult rv = NS_OK;
#ifdef NOISY_EVENTS
printf("%p ~RevokePostedEvents() start\n", this);
#endif
if (mPostedEvents) {
mPostedEvents = nsnull;
// Revoke any events in the event queue that are owned by us
nsIEventQueueService* eventService;
rv = nsServiceManager::GetService(kEventQueueServiceCID,
NS_GET_IID(nsIEventQueueService),
(nsISupports **)&eventService);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIEventQueue> eventQueue;
rv = eventService->GetThreadEventQueue(NS_CURRENT_THREAD,
getter_AddRefs(eventQueue));
nsServiceManager::ReleaseService(kEventQueueServiceCID, eventService);
if (NS_SUCCEEDED(rv) && eventQueue) {
rv = eventQueue->RevokeEvents(this);
}
}
}
#ifdef NOISY_EVENTS
printf("%p ~RevokePostedEvents() end\n", this);
#endif
return rv;
}
CantRenderReplacedElementEvent**
FrameManager::FindPostedEventFor(nsIFrame* aFrame)
{
CantRenderReplacedElementEvent** event = &mPostedEvents;
while (*event) {
if ((*event)->mFrame == aFrame) {
return event;
}
event = &(*event)->mNext;
}
return event;
}
void
FrameManager::DequeuePostedEventFor(nsIFrame* aFrame)
{
// If there's a posted event for this frame, then remove it
CantRenderReplacedElementEvent** event = FindPostedEventFor(aFrame);
if (*event) {
CantRenderReplacedElementEvent* tmp = *event;
// Remove it from our linked list of posted events
*event = (*event)->mNext;
// Dequeue it from the event queue
nsIEventQueueService* eventService;
nsresult rv;
rv = nsServiceManager::GetService(kEventQueueServiceCID,
NS_GET_IID(nsIEventQueueService),
(nsISupports **)&eventService);
NS_ASSERTION(NS_SUCCEEDED(rv),
"will crash soon due to event holding dangling pointer to frame");
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIEventQueue> eventQueue;
rv = eventService->GetThreadEventQueue(NS_CURRENT_THREAD,
getter_AddRefs(eventQueue));
nsServiceManager::ReleaseService(kEventQueueServiceCID, eventService);
NS_ASSERTION(NS_SUCCEEDED(rv) && eventQueue,
"will crash soon due to event holding dangling pointer to frame");
if (NS_SUCCEEDED(rv) && eventQueue) {
PLEventQueue* plqueue;
eventQueue->GetPLEventQueue(&plqueue);
NS_ASSERTION(plqueue,
"will crash soon due to event holding dangling pointer to frame");
if (plqueue) {
// Removes the event and destroys it
PL_DequeueEvent(tmp, plqueue);
}
}
}
}
}
void
FrameManager::HandlePLEvent(CantRenderReplacedElementEvent* aEvent)
{
#ifdef NOISY_EVENTS
printf("FrameManager::HandlePLEvent() start for FM %p\n", aEvent->owner);
#endif
FrameManager* frameManager = (FrameManager*)aEvent->owner;
NS_ASSERTION(frameManager, "null frame manager");
if (!frameManager->mPresShell) {
NS_ASSERTION(frameManager->mPresShell,
"event not removed from queue on shutdown");
return;
}
// Remove the posted event from the linked list
CantRenderReplacedElementEvent** events = &frameManager->mPostedEvents;
while (*events) {
if (*events == aEvent) {
*events = (*events)->mNext;
break;
}
events = &(*events)->mNext;
NS_ASSERTION(*events, "event not in queue");
}
// Notify the style system and then process any reflow commands that
// are generated
nsCOMPtr<nsIPresContext> presContext;
frameManager->mPresShell->GetPresContext(getter_AddRefs(presContext));
frameManager->mStyleSet->CantRenderReplacedElement(presContext,
aEvent->mFrame);
#ifdef NOISY_EVENTS
printf("FrameManager::HandlePLEvent() end for FM %p\n", aEvent->owner);
#endif
}
void
FrameManager::DestroyPLEvent(CantRenderReplacedElementEvent* aEvent)
{
delete aEvent;
}
CantRenderReplacedElementEvent::CantRenderReplacedElementEvent(FrameManager* aFrameManager,
nsIFrame* aFrame)
{
PL_InitEvent(this, aFrameManager,
(PLHandleEventProc)&FrameManager::HandlePLEvent,
(PLDestroyEventProc)&FrameManager::DestroyPLEvent);
mFrame = aFrame;
}
NS_IMETHODIMP
FrameManager::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
#ifdef NOISY_EVENTS
printf("%p FrameManager::CantRenderReplacedElement called\n", this);
#endif
// We need to notify the style stystem, but post the notification so it
// doesn't happen now
nsresult rv;
nsCOMPtr<nsIEventQueueService> eventService = do_GetService(kEventQueueServiceCID, &rv);
if (eventService) {
nsCOMPtr<nsIEventQueue> eventQueue;
rv = eventService->GetThreadEventQueue(NS_CURRENT_THREAD,
getter_AddRefs(eventQueue));
if (NS_SUCCEEDED(rv) && eventQueue) {
// Verify that there isn't already a posted event associated with
// this frame.
if (*FindPostedEventFor(aFrame))
return NS_OK;
CantRenderReplacedElementEvent* ev;
// Create a new event
ev = new CantRenderReplacedElementEvent(this, aFrame);
// Add the event to our linked list of posted events
ev->mNext = mPostedEvents;
mPostedEvents = ev;
// Post the event
eventQueue->PostEvent(ev);
}
}
return rv;
}
#ifdef NS_DEBUG
static void
DumpContext(nsIFrame* aFrame, nsIStyleContext* aContext)
{
if (aFrame) {
fputs("frame: ", stdout);
nsAutoString name;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(aFrame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
}
fprintf(stdout, " (%p)", NS_STATIC_CAST(void*, aFrame));
}
if (aContext) {
fprintf(stdout, " style: %p ", NS_STATIC_CAST(void*, aContext));
nsIAtom* pseudoTag;
aContext->GetPseudoType(pseudoTag);
if (pseudoTag) {
nsAutoString buffer;
pseudoTag->ToString(buffer);
fputs(NS_LossyConvertUCS2toASCII(buffer).get(), stdout);
fputs(" ", stdout);
NS_RELEASE(pseudoTag);
}
/* XXXdwh fix debugging here. Need to add a List method to nsRuleNode
and have the context call list on its rule node.
PRInt32 count = aContext->GetStyleRuleCount();
if (0 < count) {
fputs("{\n", stdout);
nsISupportsArray* rules = aContext->GetStyleRules();
PRInt32 ix;
for (ix = 0; ix < count; ix++) {
nsIStyleRule* rule = (nsIStyleRule*)rules->ElementAt(ix);
rule->List(stdout, 1);
NS_RELEASE(rule);
}
NS_RELEASE(rules);
fputs("}\n", stdout);
}
else
*/
{
fputs("{}\n", stdout);
}
}
}
#ifdef NEW_CONTEXT_PARENTAGE_INVARIANT
static void
VerifyContextParent(nsIPresContext* aPresContext, nsIFrame* aFrame,
nsIStyleContext* aContext, nsIStyleContext* aParentContext)
{
nsIAtom* frameType;
// get the contexts not provided
if (!aContext) {
aFrame->GetStyleContext(&aContext);
} else {
// addref here so we can release at end
NS_ADDREF(aContext);
}
if (!aParentContext) {
// Get the correct parent context from the frame
// - if the frame is a placeholder, we get the out of flow frame's context
// as the parent context instead of asking the frame
aFrame->GetFrameType(&frameType);
if (nsLayoutAtoms::placeholderFrame == frameType) { // placeholder
// get out of flow frame's context as the parent context
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)aFrame)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
outOfFlowFrame->GetStyleContext(&aParentContext);
} else {
// get the parent context from the frame (indirectly)
nsIFrame* providerFrame = nsnull;
nsContextProviderRelationship relationship;
aFrame->GetParentStyleContextProvider(aPresContext,&providerFrame,relationship);
if (providerFrame) {
providerFrame->GetStyleContext(&aParentContext);
} else {
// no parent context provider: it is OK, some frames' contexts do not have parents
}
}
NS_IF_RELEASE(frameType);
} else {
// addref the parent context so we can release it at end
NS_ADDREF(aParentContext);
}
NS_ASSERTION(aContext, "Failure to get required contexts");
nsIStyleContext* actualParentContext = aContext->GetParent();
if (aParentContext) {
if (aParentContext != actualParentContext) {
DumpContext(aFrame, aContext);
if (aContext == aParentContext) {
fputs("Using parent's style context\n\n", stdout);
}
else {
fputs("Wrong parent style context: ", stdout);
DumpContext(nsnull, actualParentContext);
fputs("should be using: ", stdout);
DumpContext(nsnull, aParentContext);
fputs("\n", stdout);
}
}
}
else {
if (actualParentContext) {
DumpContext(aFrame, aContext);
fputs("Has parent context: ", stdout);
DumpContext(nsnull, actualParentContext);
fputs("Should be null\n\n", stdout);
}
}
NS_IF_RELEASE(actualParentContext);
NS_IF_RELEASE(aParentContext);
NS_IF_RELEASE(aContext);
}
static void
VerifyStyleTree(nsIPresContext* aPresContext, nsIFrame* aFrame, nsIStyleContext* aParentContext)
{
nsIStyleContext* context;
aFrame->GetStyleContext(&context);
VerifyContextParent(aPresContext, aFrame, context, aParentContext);
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
nsIFrame* child;
nsIAtom* frameType;
do {
child = nsnull;
nsresult result = aFrame->FirstChild(aPresContext, childList, &child);
while ((NS_SUCCEEDED(result)) && child) {
nsFrameState state;
child->GetFrameState(&state);
if (NS_FRAME_OUT_OF_FLOW != (state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
child->GetFrameType(&frameType);
if (nsLayoutAtoms::placeholderFrame == frameType) {
// placeholder: first recirse and verify the out of flow frame,
// then verify the placeholder's context
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
nsIStyleContext* outOfFlowContext;
// recurse to out of flow frame, letting the parent context get resolved
VerifyStyleTree(aPresContext, outOfFlowFrame, nsnull);
// verify placeholder using the out of flow's context as parent context
outOfFlowFrame->GetStyleContext(&outOfFlowContext);
VerifyContextParent(aPresContext,child, nsnull, outOfFlowContext);
NS_IF_RELEASE(outOfFlowContext);
}
else { // regular frame
VerifyStyleTree(aPresContext, child, nsnull);
}
NS_IF_RELEASE(frameType);
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
// do additional contexts
PRInt32 contextIndex = -1;
while (1 == 1) {
nsIStyleContext* extraContext = nsnull;
aFrame->GetAdditionalStyleContext(++contextIndex, &extraContext);
if (extraContext) {
VerifyContextParent(aPresContext, aFrame, extraContext, context);
NS_RELEASE(extraContext);
}
else {
break;
}
}
NS_RELEASE(context);
}
NS_IMETHODIMP
FrameManager::DebugVerifyStyleTree(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (aFrame) {
nsIStyleContext* context;
aFrame->GetStyleContext(&context);
nsIStyleContext* parentContext = context->GetParent();
VerifyStyleTree(aPresContext, aFrame, parentContext);
NS_IF_RELEASE(parentContext);
NS_RELEASE(context);
}
return NS_OK;
}
#else // NEW_CONTEXT_PARENTAGE_INVARIANT
static void
VerifyContextParent(nsIFrame* aFrame, nsIStyleContext* aContext, nsIStyleContext* aParentContext)
{
nsIStyleContext* actualParentContext = aContext->GetParent();
if (aParentContext) {
if (aParentContext != actualParentContext) {
DumpContext(aFrame, aContext);
if (aContext == aParentContext) {
fputs("Using parent's style context\n\n", stdout);
}
else {
fputs("Wrong parent style context: ", stdout);
DumpContext(nsnull, actualParentContext);
fputs("should be using: ", stdout);
DumpContext(nsnull, aParentContext);
fputs("\n", stdout);
}
}
}
else {
if (actualParentContext) {
DumpContext(aFrame, aContext);
fputs("Has parent context: ", stdout);
DumpContext(nsnull, actualParentContext);
fputs("Should be null\n\n", stdout);
}
}
NS_IF_RELEASE(actualParentContext);
}
static void
VerifyContextParent(nsIFrame* aFrame, nsIStyleContext* aParentContext)
{
nsIStyleContext* context;
aFrame->GetStyleContext(&context);
VerifyContextParent(aFrame, context, aParentContext);
NS_RELEASE(context);
}
static void
VerifyStyleTree(nsIPresContext* aPresContext, nsIFrame* aFrame, nsIStyleContext* aParentContext)
{
nsIStyleContext* context;
aFrame->GetStyleContext(&context);
VerifyContextParent(aFrame, aParentContext);
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
nsIFrame* child;
nsIAtom* frameType;
do {
child = nsnull;
nsresult result = aFrame->FirstChild(aPresContext, childList, &child);
while ((NS_SUCCEEDED(result)) && child) {
nsFrameState state;
child->GetFrameState(&state);
if (NS_FRAME_OUT_OF_FLOW != (state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
child->GetFrameType(&frameType);
if (nsLayoutAtoms::placeholderFrame == frameType) { // placeholder
// get out of flow frame and recurse there
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
nsIStyleContext* outOfFlowContext;
outOfFlowFrame->GetStyleContext(&outOfFlowContext);
VerifyContextParent(child, outOfFlowContext);
NS_RELEASE(outOfFlowContext);
VerifyStyleTree(aPresContext, outOfFlowFrame, context);
}
else { // regular frame
VerifyStyleTree(aPresContext, child, context);
}
NS_IF_RELEASE(frameType);
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
// do additional contexts
PRInt32 contextIndex = -1;
while (1 == 1) {
nsIStyleContext* extraContext = nsnull;
aFrame->GetAdditionalStyleContext(++contextIndex, &extraContext);
if (extraContext) {
VerifyContextParent(aFrame, extraContext, context);
NS_RELEASE(extraContext);
}
else {
break;
}
}
NS_RELEASE(context);
}
NS_IMETHODIMP
FrameManager::DebugVerifyStyleTree(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
if (aFrame) {
nsIStyleContext* context;
aFrame->GetStyleContext(&context);
nsIStyleContext* parentContext = context->GetParent();
VerifyStyleTree(aPresContext, aFrame, parentContext);
NS_IF_RELEASE(parentContext);
NS_RELEASE(context);
}
return NS_OK;
}
#endif //NEW_CONTEXT_PARENTAGE_INVARIANT
#endif // DEBUG
NS_IMETHODIMP
FrameManager::ReParentStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aNewParentContext)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
nsresult result = NS_ERROR_NULL_POINTER;
if (aFrame) {
#ifdef NS_DEBUG
DebugVerifyStyleTree(aPresContext, aFrame);
#endif
nsIStyleContext* oldContext = nsnull;
aFrame->GetStyleContext(&oldContext);
if (oldContext) {
nsIStyleContext* newContext = nsnull;
result = mStyleSet->ReParentStyleContext(aPresContext,
oldContext, aNewParentContext,
&newContext);
if (NS_SUCCEEDED(result) && newContext) {
if (newContext != oldContext) {
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
nsIFrame* child;
nsIAtom* frameType;
do {
child = nsnull;
result = aFrame->FirstChild(aPresContext, childList, &child);
while ((NS_SUCCEEDED(result)) && child) {
nsFrameState state;
child->GetFrameState(&state);
if (NS_FRAME_OUT_OF_FLOW != (state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
child->GetFrameType(&frameType);
if (nsLayoutAtoms::placeholderFrame == frameType) { // placeholder
// get out of flow frame and recurse there
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
result = ReParentStyleContext(aPresContext, outOfFlowFrame, newContext);
// reparent placeholder's context under out of flow frame
nsIStyleContext* outOfFlowContext;
outOfFlowFrame->GetStyleContext(&outOfFlowContext);
ReParentStyleContext(aPresContext, child, outOfFlowContext);
NS_RELEASE(outOfFlowContext);
}
else { // regular frame
result = ReParentStyleContext(aPresContext, child, newContext);
}
NS_IF_RELEASE(frameType);
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
aFrame->SetStyleContext(aPresContext, newContext);
// do additional contexts
PRInt32 contextIndex = -1;
while (1 == 1) {
nsIStyleContext* oldExtraContext = nsnull;
result = aFrame->GetAdditionalStyleContext(++contextIndex, &oldExtraContext);
if (NS_SUCCEEDED(result)) {
if (oldExtraContext) {
nsIStyleContext* newExtraContext = nsnull;
result = mStyleSet->ReParentStyleContext(aPresContext,
oldExtraContext, newContext,
&newExtraContext);
if (NS_SUCCEEDED(result) && newExtraContext) {
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
NS_RELEASE(newExtraContext);
}
NS_RELEASE(oldExtraContext);
}
}
else {
result = NS_OK; // ok not to have extras (or run out)
break;
}
}
#ifdef NS_DEBUG
VerifyStyleTree(aPresContext, aFrame, aNewParentContext);
#endif
}
NS_RELEASE(newContext);
}
NS_RELEASE(oldContext);
}
}
return result;
}
static PRBool
HasAttributeContent(nsIStyleContext* aStyleContext,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute)
{
PRBool result = PR_FALSE;
if (aStyleContext) {
const nsStyleContent* content = (const nsStyleContent*)aStyleContext->GetStyleData(eStyleStruct_Content);
PRUint32 count = content->ContentCount();
while ((0 < count) && (! result)) {
nsStyleContentType contentType;
nsAutoString contentString;
content->GetContentAt(--count, contentType, contentString);
if (eStyleContentType_Attr == contentType) {
nsIAtom* attrName = nsnull;
PRInt32 attrNameSpace = kNameSpaceID_None;
PRInt32 barIndex = contentString.FindChar('|'); // CSS namespace delimiter
if (-1 != barIndex) {
nsAutoString nameSpaceVal;
contentString.Left(nameSpaceVal, barIndex);
PRInt32 error;
attrNameSpace = nameSpaceVal.ToInteger(&error, 10);
contentString.Cut(0, barIndex + 1);
if (contentString.Length()) {
attrName = NS_NewAtom(contentString);
}
}
else {
attrName = NS_NewAtom(contentString);
}
if ((attrName == aAttribute) &&
((attrNameSpace == aNameSpaceID) ||
(attrNameSpace == kNameSpaceID_Unknown))) {
result = PR_TRUE;
}
NS_IF_RELEASE(attrName);
}
}
}
return result;
}
static PRInt32
CaptureChange(nsIStyleContext* aOldContext, nsIStyleContext* aNewContext,
nsIFrame* aFrame, nsIContent* aContent,
nsStyleChangeList& aChangeList, PRInt32 aMinChange)
{
PRInt32 ourChange = NS_STYLE_HINT_NONE;
aNewContext->CalcStyleDifference(aOldContext, ourChange);
if (aMinChange < ourChange) {
aChangeList.AppendChange(aFrame, aContent, ourChange);
aMinChange = ourChange;
}
return aMinChange;
}
#ifdef NEW_CONTEXT_PARENTAGE_INVARIANT
void
FrameManager::ReResolveStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aParentContext,
nsIContent* aParentContent,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aResultChange)
{
nsIFrame *resolvedDescendant = nsnull;
nsIStyleContext* oldContext = nsnull;
nsresult result = aFrame->GetStyleContext(&oldContext);
if (NS_SUCCEEDED(result) && oldContext) {
nsIAtom* pseudoTag = nsnull;
oldContext->GetPseudoType(pseudoTag);
nsIContent* localContent = nsnull;
nsIContent* content = nsnull;
result = aFrame->GetContent(&localContent);
if (NS_SUCCEEDED(result) && localContent) {
content = localContent;
}
else {
content = aParentContent;
}
if (aParentContent && aAttribute) { // attribute came from parent, we don't care about it here when recursing
nsFrameState frameState;
aFrame->GetFrameState(&frameState);
if (0 == (frameState & NS_FRAME_GENERATED_CONTENT)) { // keep it for generated content
aAttribute = nsnull;
}
}
if (aParentContext == nsnull) {
NOISY_TRACE_FRAME("null parent context in ReResolveStyle: getting provider frame for",aFrame);
// get the parent context from the frame (indirectly)
nsIFrame* providerFrame = nsnull;
nsContextProviderRelationship relationship;
aFrame->GetParentStyleContextProvider(aPresContext,&providerFrame,relationship);
if (providerFrame) {
NOISY_TRACE("provider frame retrieved in ReResolveStyle: ");
// see if we need to recurse and resolve the provider frame first
if (relationship != eContextProvider_Ancestor) {
NOISY_TRACE("non-ancestor provider, recursing.\n");
// provider is not an ancestor, so assume we have to reresolve it first
ReResolveStyleContext(aPresContext, providerFrame, nsnull, content,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, aResultChange);
resolvedDescendant = providerFrame;
NOISY_TRACE("returned from recursion, descendant parent context provider resolved.\n");
} else {
NOISY_TRACE("ancestor provider, assuming already resolved.\n");
}
providerFrame->GetStyleContext(&aParentContext);
}
} else {
// addref the parent passed in so we can release it at the end
NS_ADDREF(aParentContext);
NOISY_TRACE_FRAME("non-null parent context provided: using it and assuming already resolved",aFrame);
}
NS_ASSERTION(aParentContext, "Failed to resolve parent context");
// do primary context
nsIStyleContext* newContext = nsnull;
if (pseudoTag) {
nsIContent* pseudoContent = (aParentContent ? aParentContent : localContent);
aPresContext->ResolvePseudoStyleContextFor(pseudoContent, pseudoTag, aParentContext, PR_FALSE,
&newContext);
NS_RELEASE(pseudoTag);
}
else {
NS_ASSERTION(localContent, "non pseudo-element frame without content node");
aPresContext->ResolveStyleContextFor(content, aParentContext, PR_TRUE, &newContext);
}
NS_ASSERTION(newContext, "failed to get new style context");
if (newContext) {
if (newContext != oldContext) {
aMinChange = CaptureChange(oldContext, newContext, aFrame, content, aChangeList, aMinChange);
if (aMinChange < NS_STYLE_HINT_FRAMECHANGE) { // if frame gets regenerated, let it keep old context
aFrame->SetStyleContext(aPresContext, newContext);
}
// if old context had image and new context does not have the same image,
// stop the image load for the frame
const nsStyleBackground* oldColor = (const nsStyleBackground*)oldContext->GetStyleData(eStyleStruct_Background);
const nsStyleBackground* newColor = (const nsStyleBackground*)newContext->GetStyleData(eStyleStruct_Background);
if(oldColor->mBackgroundImage.Length() > 0 &&
oldColor->mBackgroundImage != newColor->mBackgroundImage ){
// stop the image loading for the frame, the image has changed
aPresContext->StopImagesFor(aFrame);
}
}
else {
// XXXdwh figure this out.
// oldContext->RemapStyle(aPresContext, PR_FALSE);
if (aAttribute && (aMinChange < NS_STYLE_HINT_REFLOW) &&
HasAttributeContent(oldContext, aAttrNameSpaceID, aAttribute)) {
aChangeList.AppendChange(aFrame, content, NS_STYLE_HINT_REFLOW);
}
}
NS_RELEASE(oldContext);
}
else {
NS_ERROR("resolve style context failed");
newContext = oldContext; // new context failed, recover... (take ref)
}
// do additional contexts
PRInt32 contextIndex = -1;
while (1 == 1) {
nsIStyleContext* oldExtraContext = nsnull;
result = aFrame->GetAdditionalStyleContext(++contextIndex, &oldExtraContext);
if (NS_SUCCEEDED(result)) {
if (oldExtraContext) {
nsIStyleContext* newExtraContext = nsnull;
oldExtraContext->GetPseudoType(pseudoTag);
NS_ASSERTION(pseudoTag, "extra style context is not pseudo element");
result = aPresContext->ResolvePseudoStyleContextFor(content, pseudoTag, newContext,
PR_FALSE, &newExtraContext);
NS_RELEASE(pseudoTag);
if (NS_SUCCEEDED(result) && newExtraContext) {
if (oldExtraContext != newExtraContext) {
aMinChange = CaptureChange(oldExtraContext, newExtraContext, aFrame,
content, aChangeList, aMinChange);
if (aMinChange < NS_STYLE_HINT_FRAMECHANGE) {
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
}
}
else {
// XXXdwh figure this out.
// oldExtraContext->RemapStyle(aPresContext, PR_FALSE);
if (aAttribute && (aMinChange < NS_STYLE_HINT_REFLOW) &&
HasAttributeContent(oldContext, aAttrNameSpaceID, aAttribute)) {
aChangeList.AppendChange(aFrame, content, NS_STYLE_HINT_REFLOW);
}
}
NS_RELEASE(newExtraContext);
}
NS_RELEASE(oldExtraContext);
}
}
else {
break;
}
}
// now look for undisplayed child content and pseudos
if (localContent && mUndisplayedMap) {
UndisplayedNode* undisplayed = mUndisplayedMap->GetFirstNode(localContent);
while (undisplayed) {
nsIStyleContext* undisplayedContext = nsnull;
undisplayed->mStyle->GetPseudoType(pseudoTag);
if (undisplayed->mContent && pseudoTag == nsnull) { // child content
aPresContext->ResolveStyleContextFor(undisplayed->mContent, newContext,
PR_TRUE, &undisplayedContext);
}
else { // pseudo element
NS_ASSERTION(pseudoTag, "pseudo element without tag");
aPresContext->ResolvePseudoStyleContextFor(localContent, pseudoTag, newContext, PR_FALSE,
&undisplayedContext);
}
NS_IF_RELEASE(pseudoTag);
if (undisplayedContext) {
if (undisplayedContext == undisplayed->mStyle) {
// XXXdwh figure this out.
// undisplayedContext->RemapStyle(aPresContext);
}
const nsStyleDisplay* display =
(const nsStyleDisplay*)undisplayedContext->GetStyleData(eStyleStruct_Display);
if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
aChangeList.AppendChange(nsnull, ((undisplayed->mContent) ? undisplayed->mContent : localContent),
NS_STYLE_HINT_FRAMECHANGE);
}
NS_RELEASE(undisplayedContext);
}
undisplayed = undisplayed->mNext;
}
}
aResultChange = aMinChange;
// now do children
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
PRInt32 childChange;
nsIFrame* child;
do {
child = nsnull;
result = aFrame->FirstChild(aPresContext, childList, &child);
while ((NS_SUCCEEDED(result)) && (child)) {
nsFrameState state;
child->GetFrameState(&state);
if (NS_FRAME_OUT_OF_FLOW != (state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
nsCOMPtr<nsIAtom> frameType;
child->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::placeholderFrame == frameType.get()) { // placeholder
// get out of flow frame and recurse there
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
if (outOfFlowFrame != resolvedDescendant) {
ReResolveStyleContext(aPresContext, outOfFlowFrame, nsnull, content,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, childChange);
} else {
NOISY_TRACE("out of flow frame already resolved as descendent\n");
}
// reresolve placeholder's context under out of flow frame
nsIStyleContext* outOfFlowContext;
outOfFlowFrame->GetStyleContext(&outOfFlowContext);
ReResolveStyleContext(aPresContext, child, outOfFlowContext, content,
kNameSpaceID_Unknown, nsnull,
aChangeList, aMinChange, childChange);
NS_RELEASE(outOfFlowContext);
}
else { // regular child frame
if (child != resolvedDescendant) {
ReResolveStyleContext(aPresContext, child, nsnull, content,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, childChange);
} else {
NOISY_TRACE_FRAME("child frame already resolved as descendent, skipping",aFrame);
}
}
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
// XXX need to do overflow frames???
NS_RELEASE(newContext);
NS_IF_RELEASE(localContent);
NS_IF_RELEASE(aParentContext);
}
}
#else // NEW_CONTEXT_PARENTAGE_INVARIANT
void
FrameManager::ReResolveStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aParentContext,
nsIContent* aParentContent,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aResultChange)
{
nsIStyleContext* oldContext = nsnull;
nsresult result = aFrame->GetStyleContext(&oldContext);
if (NS_SUCCEEDED(result) && oldContext) {
nsIAtom* pseudoTag = nsnull;
oldContext->GetPseudoType(pseudoTag);
nsIContent* localContent = nsnull;
nsIContent* content = nsnull;
result = aFrame->GetContent(&localContent);
if (NS_SUCCEEDED(result) && localContent) {
content = localContent;
}
else {
content = aParentContent;
}
if (aParentContent && aAttribute) { // attribute came from parent, we don't care about it here when recursing
nsFrameState frameState;
aFrame->GetFrameState(&frameState);
if (0 == (frameState & NS_FRAME_GENERATED_CONTENT)) { // keep it for generated content
aAttribute = nsnull;
}
}
// do primary context
nsIStyleContext* newContext = nsnull;
if (pseudoTag) {
aPresContext->ResolvePseudoStyleContextFor(aParentContent, pseudoTag, aParentContext, PR_FALSE,
&newContext);
NS_RELEASE(pseudoTag);
}
else {
NS_ASSERTION(localContent, "non pseudo-element frame without content node");
aPresContext->ResolveStyleContextFor(content, aParentContext, PR_TRUE, &newContext);
}
NS_ASSERTION(newContext, "failed to get new style context");
if (newContext) {
if (newContext != oldContext) {
aMinChange = CaptureChange(oldContext, newContext, aFrame, content, aChangeList, aMinChange);
if (aMinChange < NS_STYLE_HINT_FRAMECHANGE) { // if frame gets regenerated, let it keep old context
aFrame->SetStyleContext(aPresContext, newContext);
}
// if old context had image and new context does not have the same image,
// stop the image load for the frame
nsStyleColor* oldColor;
nsStyleColor* newColor;
oldContext->GetStyle(eStyleStruct_Color, &oldColor);
newContext->GetStyle(eStyleStruct_Color, &newColor);
if(oldColor.mBackgroundImage.Length() > 0 &&
oldColor.mBackgroundImage != newColor.mBackgroundImage ){
// stop the image loading for the frame, the image has changed
aPresContext->StopImagesFor(aFrame);
}
}
else {
// XXXdwh figure this out.
// oldContext->RemapStyle(aPresContext, PR_FALSE);
if (aAttribute && (aMinChange < NS_STYLE_HINT_REFLOW) &&
HasAttributeContent(oldContext, aAttrNameSpaceID, aAttribute)) {
aChangeList.AppendChange(aFrame, content, NS_STYLE_HINT_REFLOW);
}
}
NS_RELEASE(oldContext);
}
else {
NS_ERROR("resolve style context failed");
newContext = oldContext; // new context failed, recover... (take ref)
}
// do additional contexts
PRInt32 contextIndex = -1;
while (1 == 1) {
nsIStyleContext* oldExtraContext = nsnull;
result = aFrame->GetAdditionalStyleContext(++contextIndex, &oldExtraContext);
if (NS_SUCCEEDED(result)) {
if (oldExtraContext) {
nsIStyleContext* newExtraContext = nsnull;
oldExtraContext->GetPseudoType(pseudoTag);
NS_ASSERTION(pseudoTag, "extra style context is not pseudo element");
result = aPresContext->ResolvePseudoStyleContextFor(content, pseudoTag, newContext,
PR_FALSE, &newExtraContext);
NS_RELEASE(pseudoTag);
if (NS_SUCCEEDED(result) && newExtraContext) {
if (oldExtraContext != newExtraContext) {
aMinChange = CaptureChange(oldExtraContext, newExtraContext, aFrame,
content, aChangeList, aMinChange);
if (aMinChange < NS_STYLE_HINT_FRAMECHANGE) {
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
}
}
else {
// XXXdwh figure this out.
// oldExtraContext->RemapStyle(aPresContext, PR_FALSE);
if (aAttribute && (aMinChange < NS_STYLE_HINT_REFLOW) &&
HasAttributeContent(oldContext, aAttrNameSpaceID, aAttribute)) {
aChangeList.AppendChange(aFrame, content, NS_STYLE_HINT_REFLOW);
}
}
NS_RELEASE(newExtraContext);
}
NS_RELEASE(oldExtraContext);
}
}
else {
break;
}
}
// now look for undisplayed child content and pseudos
if (localContent && mUndisplayedMap) {
UndisplayedNode* undisplayed = mUndisplayedMap->GetFirstNode(localContent);
while (undisplayed) {
nsIStyleContext* undisplayedContext = nsnull;
undisplayed->mStyle->GetPseudoType(pseudoTag);
if (undisplayed->mContent && pseudoTag == nsnull) { // child content
aPresContext->ResolveStyleContextFor(undisplayed->mContent, newContext,
PR_TRUE, &undisplayedContext);
}
else { // pseudo element
NS_ASSERTION(pseudoTag, "pseudo element without tag");
aPresContext->ResolvePseudoStyleContextFor(localContent, pseudoTag, newContext, PR_FALSE,
&undisplayedContext);
}
NS_IF_RELEASE(pseudoTag);
if (undisplayedContext) {
if (undisplayedContext == undisplayed->mStyle) {
// XXXdwh figure this out.
// undisplayedContext->RemapStyle(aPresContext);
}
const nsStyleDisplay* display =
(const nsStyleDisplay*)undisplayedContext->GetStyleData(eStyleStruct_Display);
if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
aChangeList.AppendChange(nsnull, ((undisplayed->mContent) ? undisplayed->mContent : localContent),
NS_STYLE_HINT_FRAMECHANGE);
}
NS_RELEASE(undisplayedContext);
}
undisplayed = undisplayed->mNext;
}
}
aResultChange = aMinChange;
// now do children
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
PRInt32 childChange;
nsIFrame* child;
do {
child = nsnull;
result = aFrame->FirstChild(aPresContext, childList, &child);
while ((NS_SUCCEEDED(result)) && (child)) {
nsFrameState state;
child->GetFrameState(&state);
if (NS_FRAME_OUT_OF_FLOW != (state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
nsCOMPtr<nsIAtom> frameType;
child->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::placeholderFrame == frameType.get()) { // placeholder
// get out of flow frame and recurse there
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
ReResolveStyleContext(aPresContext, outOfFlowFrame, newContext, content,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, childChange);
// reresolve placeholder's context under out of flow frame
nsIStyleContext* outOfFlowContext;
outOfFlowFrame->GetStyleContext(&outOfFlowContext);
ReResolveStyleContext(aPresContext, child, outOfFlowContext, content,
kNameSpaceID_Unknown, nsnull,
aChangeList, aMinChange, childChange);
NS_RELEASE(outOfFlowContext);
}
else { // regular child frame
ReResolveStyleContext(aPresContext, child, newContext, content,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, childChange);
}
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
// XXX need to do overflow frames???
NS_RELEASE(newContext);
NS_IF_RELEASE(localContent);
}
}
#endif // NEW_CONTEXT_PARENTAGE_INVARIANT
NS_IMETHODIMP
FrameManager::ComputeStyleChangeFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aTopLevelChange)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
aTopLevelChange = NS_STYLE_HINT_NONE;
nsIFrame* frame = aFrame;
do {
nsIStyleContext* styleContext = nsnull;
frame->GetStyleContext(&styleContext);
nsIStyleContext* parentContext = styleContext->GetParent();
PRInt32 frameChange;
ReResolveStyleContext(aPresContext, frame, parentContext, nsnull,
aAttrNameSpaceID, aAttribute,
aChangeList, aMinChange, frameChange);
#ifdef NS_DEBUG
VerifyStyleTree(aPresContext, frame, parentContext);
#endif
NS_IF_RELEASE(parentContext);
NS_RELEASE(styleContext);
if (aTopLevelChange < frameChange) {
aTopLevelChange = frameChange;
}
if (aTopLevelChange >= NS_STYLE_HINT_REFLOW) {
// If it's going to cause a reflow (or worse), then don't touch
// the any continuations: they must be taken care of by the reflow.
#ifdef NS_DEBUG
nsIFrame* prevInFlow;
frame->GetPrevInFlow(&prevInFlow);
NS_ASSERTION(!prevInFlow, "continuing frame had more severe impact than first-in-flow");
#endif
break;
}
frame->GetNextInFlow(&frame);
} while (frame);
return NS_OK;
}
NS_IMETHODIMP
FrameManager::AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
PRBool &aAffects)
{
nsresult rv = NS_OK;
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
nsCOMPtr<nsIXMLContent> xml(do_QueryInterface(aContent));
if (xml) {
rv = mStyleSet->AttributeAffectsStyle(aAttribute, aContent, aAffects);
} else {
// not an XML element, so assume it is an HTML element and further assume that
// any attribute may affect style
// NOTE: we could list all of the presentation-hint attributes and check them,
// but there are a lot of them and this is safer.
aAffects = PR_TRUE;
rv = NS_OK;
}
return rv;
}
// Capture state for a given frame.
// Accept a content id here, in some cases we may not have content (scroll position)
NS_IMETHODIMP
FrameManager::CaptureFrameStateFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState,
nsIStatefulFrame::SpecialStateID aID)
{
NS_ENSURE_TRUE(mPresShell && aFrame && aState, NS_ERROR_FAILURE);
// Only capture state for stateful frames
nsIStatefulFrame* statefulFrame = nsnull;
aFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame), (void**) &statefulFrame);
if (!statefulFrame) {
return NS_OK;
}
// Capture the state, exit early if we get null (nothing to save)
nsCOMPtr<nsIPresState> frameState;
nsresult rv = NS_OK;
rv = statefulFrame->SaveState(aPresContext, getter_AddRefs(frameState));
if (!frameState) {
return NS_OK;
}
// Generate the hash key to store the state under
// Exit early if we get empty key
nsCOMPtr<nsIContent> content;
rv = aFrame->GetContent(getter_AddRefs(content));
nsCAutoString stateKey;
rv = GenerateStateKey(content, aID, stateKey);
if(NS_FAILED(rv) || stateKey.IsEmpty()) {
return rv;
}
// Store the state
return aState->AddState(stateKey, frameState);
}
NS_IMETHODIMP
FrameManager::CaptureFrameState(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsILayoutHistoryState* aState)
{
nsresult rv = NS_OK;
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
rv = CaptureFrameStateFor(aPresContext, aFrame, aState);
// Now capture state recursively for the frame hierarchy rooted at aFrame
nsIAtom* childListName = nsnull;
PRInt32 childListIndex = 0;
do {
nsIFrame* childFrame;
aFrame->FirstChild(aPresContext, childListName, &childFrame);
while (childFrame) {
rv = CaptureFrameState(aPresContext, childFrame, aState);
// Get the next sibling child frame
childFrame->GetNextSibling(&childFrame);
}
NS_IF_RELEASE(childListName);
aFrame->GetAdditionalChildListName(childListIndex++, &childListName);
} while (childListName);
return rv;
}
// Restore state for a given frame.
// Accept a content id here, in some cases we may not have content (scroll position)
NS_IMETHODIMP
FrameManager::RestoreFrameStateFor(nsIPresContext* aPresContext, nsIFrame* aFrame, nsILayoutHistoryState* aState, nsIStatefulFrame::SpecialStateID aID)
{
NS_ENSURE_TRUE(mPresShell && aFrame && aState, NS_ERROR_FAILURE);
// Only capture state for stateful frames
nsIStatefulFrame* statefulFrame = nsnull;
aFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame), (void**) &statefulFrame);
if (!statefulFrame) {
return NS_OK;
}
// Generate the hash key the state was stored under
// Exit early if we get empty key
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
rv = aFrame->GetContent(getter_AddRefs(content));
// If we don't have content, we can't generate a hash
// key and there's probably no state information for us.
if (!content) {
return rv;
}
nsCAutoString stateKey;
rv = GenerateStateKey(content, aID, stateKey);
if(NS_FAILED(rv) || stateKey.IsEmpty()) {
return rv;
}
// Get the state from the hash
nsCOMPtr<nsIPresState> frameState;
rv = aState->GetState(stateKey, getter_AddRefs(frameState));
if (!frameState) {
return NS_OK;
}
// Restore it
rv = statefulFrame->RestoreState(aPresContext, frameState);
NS_ENSURE_SUCCESS(rv, rv);
// If we restore ok, remove the state from the state table
return aState->RemoveState(stateKey);
}
NS_IMETHODIMP
FrameManager::RestoreFrameState(nsIPresContext* aPresContext, nsIFrame* aFrame, nsILayoutHistoryState* aState)
{
nsresult rv = NS_OK;
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
rv = RestoreFrameStateFor(aPresContext, aFrame, aState);
// Now restore state recursively for the frame hierarchy rooted at aFrame
nsIAtom* childListName = nsnull;
PRInt32 childListIndex = 0;
do {
nsIFrame* childFrame;
aFrame->FirstChild(aPresContext, childListName, &childFrame);
while (childFrame) {
rv = RestoreFrameState(aPresContext, childFrame, aState);
// Get the next sibling child frame
childFrame->GetNextSibling(&childFrame);
}
NS_IF_RELEASE(childListName);
aFrame->GetAdditionalChildListName(childListIndex++, &childListName);
} while (childListName);
return rv;
}
static inline void KeyAppendSep(nsCString& aKey)
{
if (!aKey.IsEmpty()) {
aKey.Append(">");
}
}
static inline void KeyAppendString(nsAReadableString& aString, nsCString& aKey)
{
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra work.
aKey.Append(NS_ConvertUCS2toUTF8(aString));
}
static inline void KeyAppendInt(PRInt32 aInt, nsCString& aKey)
{
KeyAppendSep(aKey);
aKey.AppendInt(aInt);
}
static inline void KeyAppendAtom(nsIAtom* aAtom, nsCString& aKey)
{
NS_PRECONDITION(aAtom, "KeyAppendAtom: aAtom can not be null!\n");
const PRUnichar* atomString = nsnull;
aAtom->GetUnicode(&atomString);
KeyAppendString(nsDependentString(atomString), aKey);
}
static inline PRBool IsAutocompleteOff(nsIDOMElement* aElement)
{
nsAutoString autocomplete;
aElement->GetAttribute(NS_LITERAL_STRING("autocomplete"), autocomplete);
ToLowerCase(autocomplete);
return autocomplete.Equals(NS_LITERAL_STRING("off"));
}
NS_IMETHODIMP
FrameManager::GenerateStateKey(nsIContent* aContent,
nsIStatefulFrame::SpecialStateID aID,
nsCString& aKey)
{
aKey.Truncate();
// SpecialStateID case - e.g. scrollbars around the content window
// The key in this case is the special state id (always < min(contentID))
if (nsIStatefulFrame::eNoID != aID) {
KeyAppendInt(aID, aKey);
return NS_OK;
}
// We must have content if we're not using a special state id
NS_ENSURE_TRUE(aContent, NS_ERROR_FAILURE);
// Don't capture state for anonymous content
PRUint32 contentID;
aContent->GetContentID(&contentID);
if (!contentID) {
return NS_OK;
}
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aContent));
if (element && IsAutocompleteOff(element)) {
return NS_OK;
}
// If we have a dom element, add tag/type/name to hash key
// This is paranoia, but guarantees that we won't restore
// state to the wrong type of control.
nsCOMPtr<nsIAtom> tag;
if (aContent->IsContentOfType(nsIContent::eHTML_FORM_CONTROL)) {
aContent->GetTag(*getter_AddRefs(tag));
KeyAppendAtom(tag, aKey);
nsAutoString name;
aContent->GetAttr(kNameSpaceID_HTML, nsHTMLAtoms::name, name);
KeyAppendString(name, aKey);
}
// If we have a form control and can calculate form information, use
// that as the key - it is more reliable than contentID.
// Important to have a unique key, and tag/type/name may not be.
nsCOMPtr<nsIFormControl> control(do_QueryInterface(aContent));
PRBool generatedUniqueKey = PR_FALSE;
if (control && mHTMLFormControls && mHTMLForms) {
if (tag == nsHTMLAtoms::input) {
PRInt32 type;
control->GetType(&type);
KeyAppendInt(type, aKey);
}
// If in a form, add form name / index of form / index in form
PRInt32 index = -1;
nsCOMPtr<nsIDOMHTMLFormElement> formElement;
control->GetForm(getter_AddRefs(formElement));
if (formElement) {
if (IsAutocompleteOff(formElement)) {
aKey.Truncate();
return NS_OK;
}
nsAutoString formName;
formElement->GetName(formName);
KeyAppendString(formName, aKey);
nsCOMPtr<nsIContent> formContent(do_QueryInterface(formElement));
mHTMLForms->IndexOf(formContent, index, PR_FALSE);
NS_ASSERTION(index > -1,
"nsFrameManager::GenerateStateKey didn't find form index!");
if (index > -1) {
KeyAppendInt(index, aKey);
nsCOMPtr<nsIForm> form(do_QueryInterface(formElement));
form->IndexOfControl(control, &index);
NS_ASSERTION(index > -1,
"nsFrameManager::GenerateStateKey didn't find form control index!");
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = PR_TRUE;
}
}
} else {
// If not in a form, add index of control in document
// Less desirable than indexing by form info.
// Hash by index of control in doc (we are not in a form)
// These are important as they are unique, and type/name may not be.
mHTMLFormControls->IndexOf(aContent, index, PR_FALSE);
NS_ASSERTION(index > -1,
"nsFrameManager::GenerateStateKey didn't find content by type!");
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = PR_TRUE;
}
}
}
if (!generatedUniqueKey) {
// Either we didn't have a form control or we aren't in an HTML document
// so we can't figure out form info, hash by content ID instead :(
KeyAppendInt(contentID, aKey);
}
return NS_OK;
}
//----------------------------------------------------------------------
static PLHashNumber
HashKey(void* key)
{
return NS_PTR_TO_INT32(key);
}
static PRIntn
CompareKeys(void* key1, void* key2)
{
return key1 == key2;
}
MOZ_DECL_CTOR_COUNTER(FrameHashTable)
FrameHashTable::FrameHashTable(PRUint32 aNumBuckets)
{
MOZ_COUNT_CTOR(FrameHashTable);
mTable = PL_NewHashTable(aNumBuckets, (PLHashFunction)HashKey,
(PLHashComparator)CompareKeys,
(PLHashComparator)nsnull,
nsnull, nsnull);
}
FrameHashTable::~FrameHashTable()
{
MOZ_COUNT_DTOR(FrameHashTable);
PL_HashTableDestroy(mTable);
}
void*
FrameHashTable::Get(void* aKey)
{
PRInt32 hashCode = NS_PTR_TO_INT32(aKey);
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
if (he) {
return he->value;
}
return nsnull;
}
void*
FrameHashTable::Put(void* aKey, void* aData)
{
PRInt32 hashCode = NS_PTR_TO_INT32(aKey);
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
if (he) {
void* oldValue = he->value;
he->value = aData;
return oldValue;
}
PL_HashTableRawAdd(mTable, hep, hashCode, aKey, aData);
return nsnull;
}
void*
FrameHashTable::Remove(void* aKey)
{
PRInt32 hashCode = NS_PTR_TO_INT32(aKey);
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
void* oldValue = nsnull;
if (he) {
oldValue = he->value;
PL_HashTableRawRemove(mTable, hep, he);
}
return oldValue;
}
static PRIntn PR_CALLBACK
RemoveEntry(PLHashEntry* he, PRIntn i, void* arg)
{
// Remove and free this entry and continue enumerating
return HT_ENUMERATE_REMOVE | HT_ENUMERATE_NEXT;
}
void
FrameHashTable::Clear()
{
PL_HashTableEnumerateEntries(mTable, RemoveEntry, 0);
}
#ifdef NS_DEBUG
static PRIntn PR_CALLBACK
EnumEntries(PLHashEntry* he, PRIntn i, void* arg)
{
// Continue enumerating
return HT_ENUMERATE_NEXT;
}
void
FrameHashTable::Dump(FILE* fp)
{
PL_HashTableDump(mTable, EnumEntries, fp);
}
#endif
void
FrameManager::DestroyPropertyList(nsIPresContext* aPresContext)
{
if (mPropertyList) {
while (mPropertyList) {
PropertyList* tmp = mPropertyList;
mPropertyList = mPropertyList->mNext;
tmp->RemoveAllProperties(aPresContext);
delete tmp;
}
}
}
FrameManager::PropertyList*
FrameManager::GetPropertyListFor(nsIAtom* aPropertyName) const
{
PropertyList* result;
for (result = mPropertyList; result; result = result->mNext) {
if (result->mName.get() == aPropertyName) {
break;
}
}
return result;
}
void
FrameManager::RemoveAllPropertiesFor(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
for (PropertyList* prop = mPropertyList; prop; prop = prop->mNext) {
prop->RemovePropertyForFrame(aPresContext, aFrame);
}
}
NS_IMETHODIMP
FrameManager::GetFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName,
PRUint32 aOptions,
void** aPropertyValue)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aPropertyName);
PropertyList* propertyList = GetPropertyListFor(aPropertyName);
nsresult result;
if (propertyList) {
result = propertyList->mFrameValueMap->Search(aFrame, aOptions, aPropertyValue);
} else {
*aPropertyValue = 0;
result = NS_IFRAME_MGR_PROP_NOT_THERE;
}
return result;
}
NS_IMETHODIMP
FrameManager::SetFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName,
void* aPropertyValue,
NSFMPropertyDtorFunc aPropDtorFunc)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aPropertyName);
PropertyList* propertyList = GetPropertyListFor(aPropertyName);
nsresult result = NS_OK;
if (propertyList) {
// Make sure the dtor function matches
if (aPropDtorFunc != propertyList->mDtorFunc) {
return NS_ERROR_INVALID_ARG;
}
} else {
propertyList = new PropertyList(aPropertyName, aPropDtorFunc, mDSTNodeArena);
if (!propertyList) {
return NS_ERROR_OUT_OF_MEMORY;
}
propertyList->mNext = mPropertyList;
mPropertyList = propertyList;
}
// The current property value (if there is one) is replaced and the current
// value is destroyed
void* oldValue;
result = propertyList->mFrameValueMap->Insert(aFrame, aPropertyValue, &oldValue);
if (NS_DST_VALUE_OVERWRITTEN == result) {
if (propertyList->mDtorFunc) {
nsCOMPtr<nsIPresContext> presContext;
mPresShell->GetPresContext(getter_AddRefs(presContext));
propertyList->mDtorFunc(presContext, aFrame, aPropertyName, oldValue);
}
}
return result;
}
NS_IMETHODIMP
FrameManager::RemoveFrameProperty(nsIFrame* aFrame,
nsIAtom* aPropertyName)
{
NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG_POINTER(aPropertyName);
PropertyList* propertyList = GetPropertyListFor(aPropertyName);
nsresult result = NS_IFRAME_MGR_PROP_NOT_THERE;
if (propertyList) {
nsCOMPtr<nsIPresContext> presContext;
mPresShell->GetPresContext(getter_AddRefs(presContext));
if (propertyList->RemovePropertyForFrame(presContext, aFrame)) {
result = NS_OK;
}
}
return result;
}
//----------------------------------------------------------------------
MOZ_DECL_CTOR_COUNTER(UndisplayedMap)
UndisplayedMap::UndisplayedMap(PRUint32 aNumBuckets)
{
MOZ_COUNT_CTOR(UndisplayedMap);
mTable = PL_NewHashTable(aNumBuckets, (PLHashFunction)HashKey,
(PLHashComparator)CompareKeys,
(PLHashComparator)nsnull,
nsnull, nsnull);
mLastLookup = nsnull;
}
UndisplayedMap::~UndisplayedMap(void)
{
MOZ_COUNT_DTOR(UndisplayedMap);
Clear();
PL_HashTableDestroy(mTable);
}
PLHashEntry**
UndisplayedMap::GetEntryFor(nsIContent* aParentContent)
{
if (mLastLookup && (aParentContent == (*mLastLookup)->key)) {
return mLastLookup;
}
PLHashNumber hashCode = NS_PTR_TO_INT32(aParentContent);
PLHashEntry** entry = PL_HashTableRawLookup(mTable, hashCode, aParentContent);
if (*entry) {
mLastLookup = entry;
}
return entry;
}
UndisplayedNode*
UndisplayedMap::GetFirstNode(nsIContent* aParentContent)
{
PLHashEntry** entry = GetEntryFor(aParentContent);
if (*entry) {
return (UndisplayedNode*)((*entry)->value);
}
return nsnull;
}
nsresult
UndisplayedMap::AppendNodeFor(UndisplayedNode* aNode, nsIContent* aParentContent)
{
PLHashEntry** entry = GetEntryFor(aParentContent);
if (*entry) {
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
while (node->mNext) {
NS_ASSERTION((node->mContent != aNode->mContent) ||
((node->mContent == nsnull) &&
(node->mStyle != aNode->mStyle)), "node in map twice");
node = node->mNext;
}
node->mNext = aNode;
}
else {
PLHashNumber hashCode = NS_PTR_TO_INT32(aParentContent);
PL_HashTableRawAdd(mTable, entry, hashCode, aParentContent, aNode);
mLastLookup = nsnull; // hashtable may have shifted bucket out from under us
}
return NS_OK;
}
nsresult
UndisplayedMap::AddNodeFor(nsIContent* aParentContent, nsIContent* aChild,
nsIStyleContext* aStyle)
{
UndisplayedNode* node = new UndisplayedNode(aChild, aStyle);
if (! node) {
return NS_ERROR_OUT_OF_MEMORY;
}
return AppendNodeFor(node, aParentContent);
}
nsresult
UndisplayedMap::AddNodeFor(nsIContent* aParentContent, nsIStyleContext* aPseudoStyle)
{
UndisplayedNode* node = new UndisplayedNode(aPseudoStyle);
if (! node) {
return NS_ERROR_OUT_OF_MEMORY;
}
return AppendNodeFor(node, aParentContent);
}
nsresult
UndisplayedMap::GetNodeFor(nsIContent* aContent, nsIStyleContext** aResult)
{
PLHashEntry** entry = GetEntryFor(aContent);
if (*entry) {
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
*aResult = node->mStyle;
NS_IF_ADDREF(*aResult);
}
else
*aResult = nsnull;
return NS_OK;
}
nsresult
UndisplayedMap::RemoveNodeFor(nsIContent* aParentContent, UndisplayedNode* aNode)
{
PLHashEntry** entry = GetEntryFor(aParentContent);
NS_ASSERTION(*entry, "content not in map");
if (*entry) {
if ((UndisplayedNode*)((*entry)->value) == aNode) { // first node
if (aNode->mNext) {
(*entry)->value = aNode->mNext;
aNode->mNext = nsnull;
}
else {
PL_HashTableRawRemove(mTable, entry, *entry);
mLastLookup = nsnull; // hashtable may have shifted bucket out from under us
}
}
else {
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
while (node->mNext) {
if (node->mNext == aNode) {
node->mNext = aNode->mNext;
aNode->mNext = nsnull;
break;
}
node = node->mNext;
}
}
}
delete aNode;
return NS_OK;
}
nsresult
UndisplayedMap::RemoveNodesFor(nsIContent* aParentContent)
{
PLHashEntry** entry = GetEntryFor(aParentContent);
NS_ASSERTION(entry, "content not in map");
if (*entry) {
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
delete node;
if (entry == mLastLookup) {
mLastLookup = nsnull;
}
PL_HashTableRawRemove(mTable, entry, *entry);
}
return NS_OK;
}
static PRIntn PR_CALLBACK
RemoveUndisplayedEntry(PLHashEntry* he, PRIntn i, void* arg)
{
UndisplayedNode* node = (UndisplayedNode*)(he->value);
delete node;
// Remove and free this entry and continue enumerating
return HT_ENUMERATE_REMOVE | HT_ENUMERATE_NEXT;
}
void
UndisplayedMap::Clear(void)
{
mLastLookup = nsnull;
PL_HashTableEnumerateEntries(mTable, RemoveUndisplayedEntry, 0);
}
//----------------------------------------------------------------------
FrameManager::PropertyList::PropertyList(nsIAtom* aName,
NSFMPropertyDtorFunc aDtorFunc,
nsDST::NodeArena* aDSTNodeArena)
: mName(aName), mFrameValueMap(new nsDST(aDSTNodeArena)),
mDtorFunc(aDtorFunc), mNext(nsnull)
{
}
FrameManager::PropertyList::~PropertyList()
{
delete mFrameValueMap;
}
class DestroyPropertyValuesFunctor : public nsDSTNodeFunctor {
public:
DestroyPropertyValuesFunctor(nsIPresContext* aPresContext,
nsIAtom* aPropertyName,
NSFMPropertyDtorFunc aDtorFunc)
: mPresContext(aPresContext), mPropertyName(aPropertyName), mDtorFunc(aDtorFunc) {}
virtual void operator () (void *aKey, void *aValue) {
mDtorFunc(mPresContext, (nsIFrame*)aKey, mPropertyName, aValue);
}
nsIPresContext* mPresContext;
nsIAtom* mPropertyName;
NSFMPropertyDtorFunc mDtorFunc;
};
void
FrameManager::PropertyList::RemoveAllProperties(nsIPresContext* aPresContext)
{
if (mDtorFunc) {
DestroyPropertyValuesFunctor functor(aPresContext, mName, mDtorFunc);
// Enumerate any remaining frame/value pairs and destroy the value object
mFrameValueMap->Enumerate(functor);
}
}
PRBool
FrameManager::PropertyList::RemovePropertyForFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
void* value;
nsresult result;
// If the property exists, then we need to run the dtor function so
// do a search with the option to remove the key/value pair
result = mFrameValueMap->Search(aFrame, NS_DST_REMOVE_KEY_VALUE, &value);
if (NS_OK == result) {
// The property was set
if (mDtorFunc) {
// Destroy the property value
mDtorFunc(aPresContext, aFrame, mName, value);
}
return PR_TRUE;
}
return PR_FALSE;
}
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