mozilla
/
pjs
зеркало из https://github.com/mozilla/pjs.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
pjs/layout/base/nsFrameManager.cpp

2071 строка
66 KiB
C++
Исходник Ответственный История

/* -*- 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 "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"
// Class IID's
static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
// IID's
static NS_DEFINE_IID(kIEventQueueServiceIID, NS_IEVENTQUEUESERVICE_IID);
//----------------------------------------------------------------------
// 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);
// 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;
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);
// 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 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);
/** return PR_TRUE if this instance is prepared to process events
* (specifically, CantRenderReplacedElement events.)
*/
NS_IMETHOD CanProcessEvents() { return mCanProcessEvents; }
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);
// 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;
// keep around a flag that we use to prevent processing on event callbacks after
// we've started the shutdown procedure
PRBool mCanProcessEvents;
PropertyList* mPropertyList;
void ReResolveStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aParentContext,
nsIContent* aParentContent,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aResultChange);
void 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_LAYOUT 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();
mCanProcessEvents = PR_TRUE;
}
NS_IMPL_ADDREF(FrameManager)
NS_IMPL_RELEASE(FrameManager)
FrameManager::~FrameManager()
{
#ifdef NOISY_EVENTS
printf("%p ~FrameManager() start\n", this);
#endif
nsCOMPtr<nsIPresContext> presContext;
mPresShell->GetPresContext(getter_AddRefs(presContext));
// first, mark this FM so it no longer can accept events
mCanProcessEvents = PR_FALSE;
// Revoke any events posted to the event queue that we haven't processed yet
RevokePostedEvents();
// 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);
#ifdef NOISY_EVENTS
printf("%p ~FrameManager() end\n", this);
#endif
}
nsresult
FrameManager::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (aIID.Equals(GetIID())) {
*aInstancePtr = (void*)(nsIFrameManager*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
FrameManager::Init(nsIPresShell* aPresShell,
nsIStyleSet* 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;
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::GetRootFrame(nsIFrame** aRootFrame) const
{
NS_ENSURE_ARG_POINTER(aRootFrame);
*aRootFrame = mRootFrame;
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetRootFrame(nsIFrame* aRootFrame)
{
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_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_ARG_POINTER(aResult);
NS_ENSURE_ARG_POINTER(aContent);
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
if (mPrimaryFrameMap) {
mPrimaryFrameMap->Search(aContent, 0, (void**)aResult);
if (!*aResult) {
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));
mPresShell->GetPresContext(getter_AddRefs(presContext));
styleSet->FindPrimaryFrameFor(presContext, this, aContent, aResult);
}
} else {
*aResult = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::SetPrimaryFrameFor(nsIContent* aContent,
nsIFrame* aPrimaryFrame)
{
NS_ENSURE_ARG_POINTER(aContent);
// 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()
{
if (mPrimaryFrameMap) {
mPrimaryFrameMap->Clear();
}
return NS_OK;
}
// Placeholder frame functions
NS_IMETHODIMP
FrameManager::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
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_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()
{
if (mPlaceholderMap) {
mPlaceholderMap->Clear();
}
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::SetUndisplayedContent(nsIContent* aContent,
nsIStyleContext* aStyleContext)
{
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)
{
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)
{
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)
{
if (mUndisplayedMap) {
return mUndisplayedMap->RemoveNodesFor(aParentContent);
}
return NS_OK;
}
NS_IMETHODIMP
FrameManager::ClearUndisplayedContentMap()
{
if (mUndisplayedMap) {
mUndisplayedMap->Clear();
}
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
return aParentFrame->AppendFrames(aPresContext, aPresShell, aListName,
aFrameList);
}
NS_IMETHODIMP
FrameManager::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
return aParentFrame->InsertFrames(aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
NS_IMETHODIMP
FrameManager::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
return aParentFrame->RemoveFrame(aPresContext, aPresShell, aListName,
aOldFrame);
}
NS_IMETHODIMP
FrameManager::ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aParentFrame,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame)
{
return aParentFrame->ReplaceFrame(aPresContext, aPresShell, aListName,
aOldFrame, aNewFrame);
}
//----------------------------------------------------------------------
NS_IMETHODIMP
FrameManager::NotifyDestroyingFrame(nsIFrame* aFrame)
{
// 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;
}
void
FrameManager::RevokePostedEvents()
{
#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;
nsresult rv;
rv = nsServiceManager::GetService(kEventQueueServiceCID,
kIEventQueueServiceIID,
(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) {
eventQueue->RevokeEvents(this);
}
}
}
#ifdef NOISY_EVENTS
printf("%p ~RevokePostedEvents() end\n", this);
#endif
}
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,
kIEventQueueServiceIID,
(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) {
PLEventQueue* plqueue;
eventQueue->GetPLEventQueue(&plqueue);
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;
//adding a ptr check since talkback is complaining about a crash here.
//I suspect that if the event->owner is really null, bad things will happen
//elsewhere.
if(frameManager && frameManager->CanProcessEvents()) {
// Remove the posted event from the linked list
CantRenderReplacedElementEvent** events = &frameManager->mPostedEvents;
while (*events) {
if (*events == aEvent) {
*events = (*events)->mNext;
break;
} else {
events = &(*events)->mNext;
}
}
// 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)
{
// Note: because the frame manager owns us we don't hold a reference to the
// frame manager
PL_InitEvent(this, aFrameManager, (PLHandleEventProc)&FrameManager::HandlePLEvent,
(PLDestroyEventProc)&FrameManager::DestroyPLEvent);
mFrame = aFrame;
}
NS_IMETHODIMP
FrameManager::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
#ifdef NOISY_EVENTS
printf("%p FrameManager::CantRenderReplacedElement called\n", this);
#endif
nsIEventQueueService* eventService;
nsresult rv;
// We need to notify the style stystem, but post the notification so it
// doesn't happen now
rv = nsServiceManager::GetService(kEventQueueServiceCID,
kIEventQueueServiceIID,
(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) {
#ifdef NS_DEBUG
// Verify that there isn't already a posted event associated with
// this frame
NS_ASSERTION(!*FindPostedEventFor(aFrame), "frame already has posted event");
#endif
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(name, stdout);
}
fprintf(stdout, " (%p)", aFrame);
}
if (aContext) {
fprintf(stdout, " style: %p ", aContext);
nsIAtom* pseudoTag;
aContext->GetPseudoType(pseudoTag);
if (pseudoTag) {
nsAutoString buffer;
pseudoTag->ToString(buffer);
fputs(buffer, stdout);
fputs(" ", stdout);
NS_RELEASE(pseudoTag);
}
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);
}
}
}
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)
{
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
NS_IMETHODIMP
FrameManager::ReParentStyleContext(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aNewParentContext)
{
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;
}
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_FALSE, &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, (nsStyleColor &)oldColor);
newContext->GetStyle(eStyleStruct_Color, (nsStyleColor &)newColor);
if(oldColor.mBackgroundImage.Length() > 0 &&
oldColor.mBackgroundImage != newColor.mBackgroundImage ){
// stop the image loading for the frame, the image has changed
aPresContext->StopAllLoadImagesFor(aFrame);
}
}
else {
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 {
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_FALSE, &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) {
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);
}
}
NS_IMETHODIMP
FrameManager::ComputeStyleChangeFor(nsIPresContext* aPresContext,
nsIFrame* aFrame,
PRInt32 aAttrNameSpaceID,
nsIAtom* aAttribute,
nsStyleChangeList& aChangeList,
PRInt32 aMinChange,
PRInt32& aTopLevelChange)
{
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;
}
frame->GetNextInFlow(&frame);
} while (frame);
return NS_OK;
}
NS_IMETHODIMP
FrameManager::AttributeAffectsStyle(nsIAtom *aAttribute, nsIContent *aContent,
PRBool &aAffects)
{
nsresult rv = NS_OK;
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)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
// See if the frame is stateful.
// Frames are not ref-counted so no addref/release is required on statefulFrame.
nsIStatefulFrame* statefulFrame = nsnull;
aFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame), (void**) &statefulFrame);
if (nsnull != statefulFrame) {
// If not given one, get the content ID
PRUint32 ID = aID;
if (nsIStatefulFrame::eNoID == ID) {
nsCOMPtr<nsIContent> content;
rv = aFrame->GetContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv) && content) {
rv = content->GetContentID(&ID);
}
}
if (NS_SUCCEEDED(rv) && ID) { // Must have ID (don't do anonymous content)
// Get the state type
nsIStatefulFrame::StateType type = nsIStatefulFrame::eNoType;
rv = statefulFrame->GetStateType(aPresContext, &type);
if (NS_SUCCEEDED(rv)) {
// Get the state
nsCOMPtr<nsIPresState> frameState;
rv = statefulFrame->SaveState(aPresContext, getter_AddRefs(frameState));
if (NS_SUCCEEDED(rv)) {
// add an association between (ID, type) and (state) to the
// history state storage object, aState.
rv = aState->AddState(ID, frameState, type);
}
}
}
}
return rv;
}
NS_IMETHODIMP
FrameManager::CaptureFrameState(nsIPresContext* aPresContext, nsIFrame* aFrame, nsILayoutHistoryState* aState)
{
nsresult rv = NS_OK;
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)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
// See if the frame is stateful.
// Frames are not ref-counted so no addref/release is required on statefulFrame.
nsIStatefulFrame* statefulFrame = nsnull;
aFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame), (void**) &statefulFrame);
if (nsnull != statefulFrame) {
// If not given one, get the content ID
PRUint32 ID = aID;
if (nsIStatefulFrame::eNoID == ID) {
nsCOMPtr<nsIContent> content;
rv = aFrame->GetContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv) && content) {
rv = content->GetContentID(&ID);
}
}
if (NS_SUCCEEDED(rv) && ID) { // Must have ID (don't do anonymous content)
nsIStatefulFrame::StateType type = nsIStatefulFrame::eNoType;
rv = statefulFrame->GetStateType(aPresContext, &type);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPresState> frameState;
rv = aState->GetState(ID, getter_AddRefs(frameState), type);
if (NS_SUCCEEDED(rv) && frameState) {
// First restore the state.
rv = statefulFrame->RestoreState(aPresContext, frameState);
// Now remove the state from the state table.
aState->RemoveState(ID, type);
}
}
}
}
return rv;
}
NS_IMETHODIMP
FrameManager::RestoreFrameState(nsIPresContext* aPresContext, nsIFrame* aFrame, nsILayoutHistoryState* aState)
{
nsresult rv = NS_OK;
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 PLHashNumber
HashKey(void* key)
{
return (PLHashNumber)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 = (PRInt32) 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 = (PRInt32) 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 = (PRInt32) 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_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_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_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 = (PLHashNumber)(void*)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 = (PLHashNumber)(void*)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::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;
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку