pjs/layout/base/nsPresShell.cpp

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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):
* Steve Clark (buster@netscape.com)
*
* IBM Corporation
*
* 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
* 05/03/2000 IBM Corp. Observer events for reflow states
*/
#define PL_ARENA_CONST_ALIGN_MASK 3
#include "nsIPresShell.h"
#include "nsISpaceManager.h"
#include "nsIPresContext.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDocumentObserver.h"
#include "nsIStyleSet.h"
#include "nsICSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please?
#include "nsIStyleContext.h"
#include "nsIServiceManager.h"
#include "nsFrame.h"
#include "nsIReflowCommand.h"
#include "nsIViewManager.h"
#include "nsCRT.h"
#include "prlog.h"
#include "prmem.h"
#include "prinrval.h"
#include "nsVoidArray.h"
#include "nsIPref.h"
#include "nsIViewObserver.h"
#include "nsContainerFrame.h"
#include "nsHTMLIIDs.h"
#include "nsIDeviceContext.h"
#include "nsIEventStateManager.h"
#include "nsDOMEvent.h"
#include "nsHTMLParts.h"
#include "nsISelection.h"
#include "nsISelectionController.h"
#include "nsLayoutCID.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsWeakReference.h"
#include "nsIPageSequenceFrame.h"
#include "nsICaret.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIXMLDocument.h"
#include "nsIScrollableView.h"
#include "nsIParser.h"
#include "nsParserCIID.h"
#include "nsHTMLContentSinkStream.h"
#include "nsHTMLToTXTSinkStream.h"
#include "nsXIFDTD.h"
#include "nsIFrameSelection.h"
#include "nsIDOMNSHTMLInputElement.h" //optimization for ::DoXXX commands
#include "nsIDOMNSHTMLTextAreaElement.h"
#include "nsViewsCID.h"
#include "nsIFrameManager.h"
#include "nsISupportsPrimitives.h"
#include "nsILayoutHistoryState.h"
#include "nsIScrollPositionListener.h"
#include "nsICompositeListener.h"
#include "nsTimer.h"
#include "nsWeakPtr.h"
#include "plarena.h"
#include "nsCSSAtoms.h"
#include "nsIObserverService.h" // for reflow observation
#include "nsIDocShell.h" // for reflow observation
#ifdef MOZ_PERF_METRICS
#include "nsITimeRecorder.h"
#endif
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
#include "nsIReflowCallback.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDOMWindowInternal.h"
#include "nsPIDOMWindow.h"
#ifdef INCLUDE_XUL
#include "nsIDOMXULDocument.h"
#include "nsIDOMXULCommandDispatcher.h"
#endif // INCLUDE_XUL
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsIFormatConverter.h"
#include "nsIDocShellTreeItem.h"
#include "nsIURI.h"
#include "nsIEventQueue.h"
#include "nsIEventQueueService.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
#include "nsIDragService.h"
// Dummy layout request
#include "nsIChannel.h"
#include "nsILoadGroup.h"
#include "nsNetUtil.h"
// SubShell map
#include "nsDST.h"
// local management of the style watch:
// aCtlValue should be set to all actions desired (bitwise OR'd together)
// aStyleSet cannot be null
// NOTE: implementation is noop unless MOZ_PERF_METRICS is defined
static nsresult CtlStyleWatch(PRUint32 aCtlValue, nsIStyleSet *aStyleSet);
#define kStyleWatchEnable 1
#define kStyleWatchDisable 2
#define kStyleWatchPrint 4
#define kStyleWatchStart 8
#define kStyleWatchStop 16
#define kStyleWatchReset 32
// Class ID's
static NS_DEFINE_CID(kFrameSelectionCID, NS_FRAMESELECTION_CID);
static NS_DEFINE_CID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_CID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_CID(kPrefServiceCID, NS_PREF_CID);
// Drag & Drop, Clipboard Support
static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID);
static NS_DEFINE_CID(kCXIFConverterCID, NS_XIFFORMATCONVERTER_CID);
#undef NOISY
//========================================================================
#ifdef MOZ_REFLOW_PERF
class ReflowCountMgr;
static const char * kGrandTotalsStr = "Grand Totals";
#define NUM_REFLOW_TYPES 5
// Counting Class
class ReflowCounter {
public:
ReflowCounter() { mMgr = nsnull; }
ReflowCounter(ReflowCountMgr * aMgr);
~ReflowCounter();
void ClearTotals();
void DisplayTotals(const char * aStr);
void DisplayDiffTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void Add(nsReflowReason aType) { mTotals[aType]++; }
void Add(nsReflowReason aType, PRUint32 aTotal) { mTotals[aType] += aTotal; }
void CalcDiffInTotals();
void SetTotalsCache();
void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; }
protected:
void DisplayTotals(PRUint32 * aArray, const char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle);
PRUint32 mTotals[NUM_REFLOW_TYPES];
PRUint32 mCacheTotals[NUM_REFLOW_TYPES];
ReflowCountMgr * mMgr;
};
// Manager Class
class ReflowCountMgr {
public:
ReflowCountMgr();
//static ReflowCountMgr * GetInstance() { return &gReflowCountMgr; }
~ReflowCountMgr();
void ClearTotals();
void ClearGrandTotals();
void DisplayTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void DisplayDiffsInTotals(const char * aStr);
void Add(const char * aName, nsReflowReason aType);
ReflowCounter * LookUp(const char * aName);
FILE * GetOutFile() { return mFD; }
protected:
void DisplayTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
static PRIntn RemoveItems(PLHashEntry *he, PRIntn i, void *arg);
void CleanUp();
// stdout Output Methods
static PRIntn DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandTotals();
// HTML Output Methods
static PRIntn DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandHTMLTotals();
// Zero Out the Totals
static PRIntn DoClearTotals(PLHashEntry *he, PRIntn i, void *arg);
// Displays the Diff Totals
static PRIntn DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg);
PLHashTable * mCounts;
FILE * mFD;
PRBool mCycledOnce;
// ReflowCountMgr gReflowCountMgr;
};
#endif
//========================================================================
// comment out to hide caret
#define SHOW_CARET
// The upper bound on the amount of time to spend reflowing. When this bound is exceeded
// and reflow commands are still queued up, a reflow event is posted. The idea is for reflow
// to not hog the processor beyond the time specifed in gMaxRCProcessingTime.
// This data member is initialized from the layout.reflow.timeslice pref.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
// Set to true to enable async reflow during document load.
// This flag is initialized from the layout.reflow.async.duringDocLoad pref.
static PRBool gAsyncReflowDuringDocLoad = PR_FALSE;
// Largest chunk size we recycle
static const size_t gMaxRecycledSize = 400;
#define MARK_INCREMENT 50
#define BLOCK_INCREMENT 2048
/**A block of memory that the stack will
* chop up and hand out
*/
struct StackBlock {
// a block of memory
void* mBlock;
// another block of memory that would only be created
// if our stack overflowed. Yes we have the ability
// to grow on a stack overflow
StackBlock* mNext;
StackBlock()
{
mBlock = PR_Malloc(BLOCK_INCREMENT);
mNext = nsnull;
}
~StackBlock()
{
PR_Free(mBlock);
}
};
/* we hold an array of marks. A push pushes a mark on the stack
* a pop pops it off.
*/
struct StackMark {
// the block of memory we are currently handing out chunks of
StackBlock* mBlock;
// our current position in the memory
size_t mPos;
};
/* A stack arena allows a stack based interface to a block of memory.
* It should be used when you need to allocate some temporary memory that
* you will immediately return.
*/
class StackArena {
public:
StackArena();
~StackArena();
// Memory management functions
nsresult Allocate(size_t aSize, void** aResult);
nsresult Push();
nsresult Pop();
private:
// our current position in memory
size_t mPos;
// a list of memory block. Usually there is only one
// but if we overrun our stack size we can get more memory.
StackBlock* mBlocks;
// the current block of memory we are passing our chucks of
StackBlock* mCurBlock;
// our stack of mark where push has been called
StackMark* mMarks;
// the current top of the the mark list
PRUint32 mStackTop;
// the size of the mark array
PRUint32 mMarkLength;
};
StackArena::StackArena()
{
// allocate the marks array
mMarkLength = MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
// allocate our stack memory
mBlocks = new StackBlock();
mCurBlock = mBlocks;
mStackTop = 0;
mPos = 0;
}
StackArena::~StackArena()
{
// free up our data
delete[] mMarks;
while(mBlocks)
{
StackBlock* toDelete = mBlocks;
mBlocks = mBlocks->mNext;
delete toDelete;
}
}
nsresult
StackArena::Push()
{
// if the we overrun our mark array. Resize it.
if (mStackTop + 1 >= mMarkLength)
{
StackMark* oldMarks = mMarks;
PRUint32 oldLength = mMarkLength;
mMarkLength += MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
nsCRT::memcpy(mMarks, oldMarks, sizeof(StackMark)*oldLength);
delete[] oldMarks;
}
// set a mark at the top
mMarks[mStackTop].mBlock = mCurBlock;
mMarks[mStackTop].mPos = mPos;
mStackTop++;
return NS_OK;
}
nsresult
StackArena::Allocate(size_t aSize, void** aResult)
{
NS_ASSERTION(mStackTop > 0, "Error allocate called before push!!!");
// make sure we are aligned. Beard said 8 was safer then 4.
// Round size to multiple of 8
aSize = PR_ROUNDUP(aSize, 8);
// if the size makes the stack overflow. Grab another block for the stack
if (mPos + aSize >= BLOCK_INCREMENT)
{
NS_ASSERTION(aSize <= BLOCK_INCREMENT,"Requested memory is greater that our block size!!");
if (mCurBlock->mNext == nsnull)
mCurBlock->mNext = new StackBlock();
mCurBlock = mCurBlock->mNext;
mPos = 0;
}
// return the chunk they need.
*aResult = ((char*)mCurBlock->mBlock) + mPos;
mPos += aSize;
return NS_OK;
}
nsresult
StackArena::Pop()
{
// pop off the mark
NS_ASSERTION(mStackTop > 0, "Error Pop called 1 too many times");
mStackTop--;
mCurBlock = mMarks[mStackTop].mBlock;
mPos = mMarks[mStackTop].mPos;
return NS_OK;
}
// Memory is allocated 4-byte aligned. We have recyclers for chunks up to
// 200 bytes
class FrameArena {
public:
FrameArena(PRUint32 aArenaSize = 4096);
~FrameArena();
// Memory management functions
nsresult AllocateFrame(size_t aSize, void** aResult);
nsresult FreeFrame(size_t aSize, void* aPtr);
private:
// Underlying arena pool
PLArenaPool mPool;
// The recycler array is sparse with the indices being multiples of 4,
// i.e., 0, 4, 8, 12, 16, 20, ...
void* mRecyclers[gMaxRecycledSize >> 2];
};
FrameArena::FrameArena(PRUint32 aArenaSize)
{
// Initialize the arena pool
PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize);
// Zero out the recyclers array
nsCRT::memset(mRecyclers, 0, sizeof(mRecyclers));
}
FrameArena::~FrameArena()
{
// Free the arena in the pool and finish using it
PL_FinishArenaPool(&mPool);
}
nsresult
FrameArena::AllocateFrame(size_t aSize, void** aResult)
{
void* result = nsnull;
// Round size to multiple of 4
aSize = PR_ROUNDUP(aSize, 4);
// Check recyclers first
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
result = mRecyclers[index];
if (result) {
// Need to move to the next object
void* next = *((void**)result);
mRecyclers[index] = next;
}
}
if (!result) {
// Allocate a new chunk from the arena
PL_ARENA_ALLOCATE(result, &mPool, aSize);
}
*aResult = result;
return NS_OK;
}
nsresult
FrameArena::FreeFrame(size_t aSize, void* aPtr)
{
// Round size to multiple of 4
aSize = PR_ROUNDUP(aSize, 4);
// See if it's a size that we recycle
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
void* currentTop = mRecyclers[index];
mRecyclers[index] = aPtr;
*((void**)aPtr) = currentTop;
}
return NS_OK;
}
class PresShellViewEventListener : public nsIScrollPositionListener,
public nsICompositeListener
{
public:
PresShellViewEventListener();
virtual ~PresShellViewEventListener();
NS_DECL_ISUPPORTS
// nsIScrollPositionListener methods
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
// nsICompositeListener methods
NS_IMETHOD WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD WillRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
nsresult SetPresShell(nsIPresShell *aPresShell);
private:
nsresult HideCaret();
nsresult RestoreCaretVisibility();
nsIPresShell *mPresShell;
PRBool mWasVisible;
PRInt32 mCallCount;
};
struct nsDOMEventRequest
{
nsIContent* content;
nsEvent* event;
nsDOMEventRequest* next;
};
struct nsAttributeChangeRequest
{
nsIContent* content;
PRInt32 nameSpaceID;
nsIAtom* name;
nsAutoString value;
PRBool notify;
nsAttributeChangeType type;
nsAttributeChangeRequest* next;
};
struct nsCallbackEventRequest
{
nsIReflowCallback* callback;
nsCallbackEventRequest* next;
};
//----------------------------------------------------------------------
//
// DummyLayoutRequest
//
// This is a dummy request implementation that we add to the document's load
// group. It ensures that EndDocumentLoad() in the docshell doesn't fire
// before we've finished all of layout.
//
class DummyLayoutRequest : public nsIChannel
{
protected:
DummyLayoutRequest(nsIPresShell* aPresShell);
virtual ~DummyLayoutRequest();
static PRInt32 gRefCnt;
static nsIURI* gURI;
nsCOMPtr<nsILoadGroup> mLoadGroup;
nsWeakPtr mPresShell;
public:
static nsresult
Create(nsIChannel** aResult, nsIPresShell* aPresShell);
NS_DECL_ISUPPORTS
// nsIRequest
NS_IMETHOD GetName(PRUnichar* *result) {
NS_NOTREACHED("DummyLayoutRequest::GetName");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD IsPending(PRBool *_retval) { *_retval = PR_TRUE; return NS_OK; }
NS_IMETHOD GetStatus(nsresult *status) { *status = NS_OK; return NS_OK; }
NS_IMETHOD Cancel(nsresult status);
NS_IMETHOD Suspend(void) { return NS_OK; }
NS_IMETHOD Resume(void) { return NS_OK; }
// nsIChannel
NS_IMETHOD GetOriginalURI(nsIURI* *aOriginalURI) { *aOriginalURI = gURI; NS_ADDREF(*aOriginalURI); return NS_OK; }
NS_IMETHOD SetOriginalURI(nsIURI* aOriginalURI) { gURI = aOriginalURI; NS_ADDREF(gURI); return NS_OK; }
NS_IMETHOD GetURI(nsIURI* *aURI) { *aURI = gURI; NS_ADDREF(*aURI); return NS_OK; }
NS_IMETHOD SetURI(nsIURI* aURI) { gURI = aURI; NS_ADDREF(gURI); return NS_OK; }
NS_IMETHOD OpenInputStream(nsIInputStream **_retval) { *_retval = nsnull; return NS_OK; }
NS_IMETHOD OpenOutputStream(nsIOutputStream **_retval) { *_retval = nsnull; return NS_OK; }
NS_IMETHOD AsyncOpen(nsIStreamObserver *observer, nsISupports *ctxt) { return NS_OK; }
NS_IMETHOD AsyncRead(nsIStreamListener *listener, nsISupports *ctxt) { return NS_OK; }
NS_IMETHOD AsyncWrite(nsIInputStream *fromStream, nsIStreamObserver *observer, nsISupports *ctxt) { return NS_OK; }
NS_IMETHOD GetLoadAttributes(nsLoadFlags *aLoadAttributes) { *aLoadAttributes = nsIChannel::LOAD_NORMAL; return NS_OK; }
NS_IMETHOD SetLoadAttributes(nsLoadFlags aLoadAttributes) { return NS_OK; }
NS_IMETHOD GetContentType(char * *aContentType) { *aContentType = nsnull; return NS_OK; }
NS_IMETHOD SetContentType(const char *aContentType) { return NS_OK; }
NS_IMETHOD GetContentLength(PRInt32 *aContentLength) { *aContentLength = 0; return NS_OK; }
NS_IMETHOD SetContentLength(PRInt32 aContentLength) { NS_NOTREACHED("SetContentLength"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetTransferOffset(PRUint32 *aTransferOffset) { NS_NOTREACHED("GetTransferOffset"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD SetTransferOffset(PRUint32 aTransferOffset) { NS_NOTREACHED("SetTransferOffset"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetTransferCount(PRInt32 *aTransferCount) { NS_NOTREACHED("GetTransferCount"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD SetTransferCount(PRInt32 aTransferCount) { NS_NOTREACHED("SetTransferCount"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetBufferSegmentSize(PRUint32 *aBufferSegmentSize) { NS_NOTREACHED("GetBufferSegmentSize"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD SetBufferSegmentSize(PRUint32 aBufferSegmentSize) { NS_NOTREACHED("SetBufferSegmentSize"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetBufferMaxSize(PRUint32 *aBufferMaxSize) { NS_NOTREACHED("GetBufferMaxSize"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD SetBufferMaxSize(PRUint32 aBufferMaxSize) { NS_NOTREACHED("SetBufferMaxSize"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetLocalFile(nsIFile* *result) { NS_NOTREACHED("GetLocalFile"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetPipeliningAllowed(PRBool *aPipeliningAllowed) { *aPipeliningAllowed = PR_FALSE; return NS_OK; }
NS_IMETHOD SetPipeliningAllowed(PRBool aPipeliningAllowed) { NS_NOTREACHED("SetPipeliningAllowed"); return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD GetOwner(nsISupports * *aOwner) { *aOwner = nsnull; return NS_OK; }
NS_IMETHOD SetOwner(nsISupports * aOwner) { return NS_OK; }
NS_IMETHOD GetLoadGroup(nsILoadGroup * *aLoadGroup) { *aLoadGroup = mLoadGroup; NS_IF_ADDREF(*aLoadGroup); return NS_OK; }
NS_IMETHOD SetLoadGroup(nsILoadGroup * aLoadGroup) { mLoadGroup = aLoadGroup; return NS_OK; }
NS_IMETHOD GetNotificationCallbacks(nsIInterfaceRequestor * *aNotificationCallbacks) { *aNotificationCallbacks = nsnull; return NS_OK; }
NS_IMETHOD SetNotificationCallbacks(nsIInterfaceRequestor * aNotificationCallbacks) { return NS_OK; }
NS_IMETHOD GetSecurityInfo(nsISupports **info) {*info = nsnull; return NS_OK;}
};
PRInt32 DummyLayoutRequest::gRefCnt;
nsIURI* DummyLayoutRequest::gURI;
NS_IMPL_ADDREF(DummyLayoutRequest);
NS_IMPL_RELEASE(DummyLayoutRequest);
NS_IMPL_QUERY_INTERFACE2(DummyLayoutRequest, nsIRequest, nsIChannel);
nsresult
DummyLayoutRequest::Create(nsIChannel** aResult, nsIPresShell* aPresShell)
{
DummyLayoutRequest* request = new DummyLayoutRequest(aPresShell);
if (!request)
return NS_ERROR_OUT_OF_MEMORY;
*aResult = request;
NS_ADDREF(*aResult);
return NS_OK;
}
DummyLayoutRequest::DummyLayoutRequest(nsIPresShell* aPresShell)
{
NS_INIT_REFCNT();
if (gRefCnt++ == 0) {
nsresult rv;
rv = NS_NewURI(&gURI, "about:layout-dummy-request", nsnull);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create about:layout-dummy-request");
}
mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell));
}
DummyLayoutRequest::~DummyLayoutRequest()
{
if (--gRefCnt == 0) {
NS_IF_RELEASE(gURI);
}
}
NS_IMETHODIMP
DummyLayoutRequest::Cancel(nsresult status)
{
// Cancel layout
nsresult rv = NS_OK;
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
rv = presShell->CancelAllReflowCommands();
}
return rv;
}
// ----------------------------------------------------------------------------
class PresShell : public nsIPresShell, public nsIViewObserver,
private nsIDocumentObserver, public nsIFocusTracker,
public nsISelectionController,
public nsSupportsWeakReference
{
public:
PresShell();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports
NS_DECL_ISUPPORTS
// nsIPresShell
NS_IMETHOD Init(nsIDocument* aDocument,
nsIPresContext* aPresContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet);
NS_IMETHOD AllocateFrame(size_t aSize, void** aResult);
NS_IMETHOD FreeFrame(size_t aSize, void* aFreeChunk);
// Dynamic stack memory allocation
NS_IMETHOD PushStackMemory();
NS_IMETHOD PopStackMemory();
NS_IMETHOD AllocateStackMemory(size_t aSize, void** aResult);
NS_IMETHOD GetDocument(nsIDocument** aResult);
NS_IMETHOD GetPresContext(nsIPresContext** aResult);
NS_IMETHOD GetViewManager(nsIViewManager** aResult);
NS_IMETHOD GetStyleSet(nsIStyleSet** aResult);
NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle);
NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle);
NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList);
NS_IMETHOD SetDisplaySelection(PRInt16 aToggle);
NS_IMETHOD GetDisplaySelection(PRInt16 *aToggle);
NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection);
NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion);
NS_IMETHOD RepaintSelection(SelectionType aType);
NS_IMETHOD GetFrameSelection(nsIFrameSelection** aSelection);
NS_IMETHOD BeginObservingDocument();
NS_IMETHOD EndObservingDocument();
NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD StyleChangeReflow();
NS_IMETHOD GetRootFrame(nsIFrame** aFrame) const;
NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const;
NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aPrimaryFrame) const;
NS_IMETHOD GetStyleContextFor(nsIFrame* aFrame,
nsIStyleContext** aStyleContext) const;
NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const;
NS_IMETHOD GetSubShellFor(nsIContent* aContent,
nsISupports** aResult) const;
NS_IMETHOD SetSubShellFor(nsIContent* aContent,
nsISupports* aSubShell);
NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aPlaceholderFrame) const;
NS_IMETHOD AppendReflowCommand(nsIReflowCommand* aReflowCommand);
NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame, nsIReflowCommand::ReflowType* aCmdType);
NS_IMETHOD CancelAllReflowCommands();
NS_IMETHOD FlushPendingNotifications();
/**
* Post a request to handle a DOM event after Reflow has finished.
*/
NS_IMETHOD PostDOMEvent(nsIContent* aContent, nsEvent* aEvent);
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHOD PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType);
/**
* Post a callback that should be handled after reflow has finished.
*/
NS_IMETHOD PostReflowCallback(nsIReflowCallback* aCallback);
/**
* Reflow batching
*/
NS_IMETHOD BeginReflowBatching();
NS_IMETHOD EndReflowBatching(PRBool aFlushPendingReflows);
NS_IMETHOD GetReflowBatchingStatus(PRBool* aBatch);
NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aContext);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
NS_IMETHOD GoToAnchor(const nsString& aAnchorName) const;
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const;
NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame);
NS_IMETHOD GetFrameManager(nsIFrameManager** aFrameManager) const;
NS_IMETHOD DoCopy();
NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, PRBool aLeavingPage);
NS_IMETHOD GetHistoryState(nsILayoutHistoryState** aLayoutHistoryState);
NS_IMETHOD SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState);
NS_IMETHOD GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const;
NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus);
NS_IMETHOD GetEventTargetFrame(nsIFrame** aFrame);
NS_IMETHOD IsReflowLocked(PRBool* aIsLocked);
//nsIViewObserver interface
NS_IMETHOD Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD HandleEvent(nsIView* aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled);
NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsEvent* aEvent,
nsEventStatus* aStatus);
NS_IMETHOD Scrolled(nsIView *aView);
NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight);
//nsIFocusTracker interface
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame);
// caret handling
NS_IMETHOD GetCaret(nsICaret **aOutCaret);
NS_IMETHOD SetCaretEnabled(PRBool aInEnable);
NS_IMETHOD SetCaretWidth(PRInt16 twips);
NS_IMETHOD SetCaretReadOnly(PRBool aReadOnly);
NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled);
NS_IMETHOD SetDisplayNonTextSelection(PRBool aInEnable);
NS_IMETHOD GetDisplayNonTextSelection(PRBool *aOutEnable);
// nsISelectionController
NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD LineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD IntraLineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD PageMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD ScrollPage(PRBool aForward);
NS_IMETHOD ScrollLine(PRBool aForward);
NS_IMETHOD ScrollHorizontal(PRBool aLeft);
NS_IMETHOD CompleteScroll(PRBool aForward);
NS_IMETHOD CompleteMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD SelectAll();
NS_IMETHOD CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval);
// nsIDocumentObserver
NS_IMETHOD BeginUpdate(nsIDocument *aDocument);
NS_IMETHOD EndUpdate(nsIDocument *aDocument);
NS_IMETHOD BeginLoad(nsIDocument *aDocument);
NS_IMETHOD EndLoad(nsIDocument *aDocument);
NS_IMETHOD BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell);
NS_IMETHOD EndReflow(nsIDocument *aDocument, nsIPresShell* aShell);
NS_IMETHOD ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent);
NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2);
NS_IMETHOD AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint);
NS_IMETHOD ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer);
NS_IMETHOD ContentInserted(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentReplaced(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet);
NS_IMETHOD StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet);
NS_IMETHOD StyleSheetDisabledStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDisabled);
NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint);
NS_IMETHOD StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_IMETHOD StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_IMETHOD DocumentWillBeDestroyed(nsIDocument *aDocument);
#ifdef MOZ_REFLOW_PERF
NS_IMETHOD ClearTotals();
NS_IMETHOD DumpReflows();
NS_IMETHOD CountReflows(const char * aName, PRUint32 aType);
#endif
protected:
virtual ~PresShell();
void HandlePostedDOMEvents();
void HandlePostedAttributeChanges();
void HandlePostedReflowCallbacks();
/** notify all external reflow observers that reflow of type "aData" is about
* to begin.
*/
nsresult NotifyReflowObservers(const char *aData);
nsresult ReflowCommandAdded(nsIReflowCommand* aRC);
nsresult ReflowCommandRemoved(nsIReflowCommand* aRC);
nsresult AddDummyLayoutRequest(void);
nsresult RemoveDummyLayoutRequest(void);
nsresult ReconstructFrames(void);
nsresult CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult);
nsresult WillCauseReflow();
nsresult DidCauseReflow();
nsresult ProcessReflowCommands(PRBool aInterruptible);
nsresult GetReflowEventStatus(PRBool* aPending);
nsresult SetReflowEventStatus(PRBool aPending);
void PostReflowEvent();
PRBool AlreadyInQueue(nsIReflowCommand* aReflowCommand);
friend struct ReflowEvent;
// utility to determine if we're in the middle of a drag
PRBool IsDragInProgress ( ) const ;
PRBool mCaretEnabled;
#ifdef NS_DEBUG
PRBool VerifyIncrementalReflow();
PRBool mInVerifyReflow;
#endif
// IMPORTANT: The ownership implicit in the following member variables has been
// explicitly checked and set using nsCOMPtr for owning pointers and raw COM interface
// pointers for weak (ie, non owning) references. If you add any members to this
// class, please make the ownership explicit (pinkerton, scc).
// these are the same Document and PresContext owned by the DocViewer.
// we must share ownership.
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsIPresContext> mPresContext;
nsCOMPtr<nsIStyleSet> mStyleSet;
nsIViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to
nsILayoutHistoryState* mHistoryState; // [WEAK] session history owns this
PRUint32 mUpdateCount;
nsVoidArray mReflowCommands;
PRPackedBool mDocumentLoading;
PRPackedBool mIsReflowing;
PRPackedBool mIsDestroying;
nsIFrame* mCurrentEventFrame;
nsIContent* mCurrentEventContent;
nsVoidArray mCurrentEventFrameStack;
nsVoidArray mCurrentEventContentStack;
#ifdef NS_DEBUG
nsRect mCurrentTargetRect;
nsIView* mCurrentTargetView;
#endif
nsCOMPtr<nsIFrameSelection> mSelection;
nsCOMPtr<nsICaret> mCaret;
PRBool mDisplayNonTextSelection;
PRBool mScrollingEnabled; //used to disable programmable scrolling from outside
nsIFrameManager* mFrameManager; // we hold a reference
PresShellViewEventListener *mViewEventListener;
PRBool mPendingReflowEvent;
nsCOMPtr<nsIEventQueue> mEventQueue;
FrameArena mFrameArena;
StackArena* mStackArena;
PRInt32 mAccumulatedReflowTime; // Time spent in reflow command processing so far
PRPackedBool mBatchReflows; // When set to true, the pres shell batches reflow commands.
nsCOMPtr<nsIObserverService> mObserverService; // Observer service for reflow events
nsCOMPtr<nsIDragService> mDragService;
PRInt32 mRCCreatedDuringLoad; // Counter to keep track of reflow commands created during doc
nsCOMPtr<nsIChannel> mDummyLayoutRequest;
// used for list of posted events and attribute changes. To be done
// after reflow.
nsDOMEventRequest* mFirstDOMEventRequest;
nsDOMEventRequest* mLastDOMEventRequest;
nsAttributeChangeRequest* mFirstAttributeRequest;
nsAttributeChangeRequest* mLastAttributeRequest;
nsCallbackEventRequest* mFirstCallbackEventRequest;
nsCallbackEventRequest* mLastCallbackEventRequest;
// subshell map
nsDST* mSubShellMap; // map of content/subshell pairs
nsDST::NodeArena* mDSTNodeArena; // weak link. DST owns (mSubShellMap object)
MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow
MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation
#ifdef MOZ_REFLOW_PERF
ReflowCountMgr * mReflowCountMgr;
#endif
private:
void FreeDynamicStack();
//helper funcs for disabing autoscrolling
void DisableScrolling(){mScrollingEnabled = PR_FALSE;}
void EnableScrolling(){mScrollingEnabled = PR_TRUE;}
PRBool IsScrollingEnabled(){return mScrollingEnabled;}
//helper funcs for event handling
nsIFrame* GetCurrentEventFrame();
void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent);
void PopCurrentEventInfo();
nsresult HandleEventInternal(nsEvent* aEvent, nsIView* aView, PRUint32 aFlags, nsEventStatus *aStatus);
};
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsIPresContext* aPresContext, nsIFrameManager* aFrameManager)
{
if (aFrameManager && nsIFrameDebug::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame;
aFrameManager->GetRootFrame(&rootFrame);
aFrameManager->DebugVerifyStyleTree(aPresContext, rootFrame);
}
}
#define VERIFY_STYLE_TREE VerifyStyleTree(mPresContext, mFrameManager)
#else
#define VERIFY_STYLE_TREE
#endif
#ifdef NS_DEBUG
/**
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule;
static PRUint32 gVerifyReflowFlags;
#endif
static PRBool gVerifyReflowEnabled;
NS_LAYOUT PRBool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
gLogModule = PR_NewLogModule("verifyreflow");
gVerifyReflowFlags = gLogModule->level;
if (VERIFY_REFLOW_ON & gVerifyReflowFlags) {
gVerifyReflowEnabled = PR_TRUE;
}
printf("Note: verifyreflow is %sabled",
gVerifyReflowEnabled ? "en" : "dis");
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf(" (noisy)");
}
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf(" (all)");
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf(" (show reflow commands)");
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf(" (noisy reflow commands)");
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf(" (REALLY noisy reflow commands)");
}
}
printf("\n");
}
#endif
return gVerifyReflowEnabled;
}
NS_LAYOUT void
nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled)
{
gVerifyReflowEnabled = aEnabled;
}
NS_LAYOUT PRInt32
nsIPresShell::GetVerifyReflowFlags()
{
#ifdef NS_DEBUG
return gVerifyReflowFlags;
#else
return 0;
#endif
}
//----------------------------------------------------------------------
NS_LAYOUT nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
PresShell* it = new PresShell();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIPresShell),
(void **) aInstancePtrResult);
}
PresShell::PresShell():mStackArena(nsnull),
mFirstDOMEventRequest(nsnull),
mLastDOMEventRequest(nsnull),
mFirstAttributeRequest(nsnull),
mLastAttributeRequest(nsnull),
mFirstCallbackEventRequest(nsnull),
mLastCallbackEventRequest(nsnull)
{
NS_INIT_REFCNT();
mIsDestroying = PR_FALSE;
mCaretEnabled = PR_FALSE;
mDisplayNonTextSelection = PR_FALSE;
mCurrentEventContent = nsnull;
mCurrentEventFrame = nsnull;
EnableScrolling();
#ifdef NS_DEBUG
mCurrentTargetView = nsnull;
#endif
mPendingReflowEvent = PR_FALSE;
mBatchReflows = PR_FALSE;
mDocumentLoading = PR_FALSE;
mSubShellMap = nsnull;
mRCCreatedDuringLoad = 0;
mDummyLayoutRequest = nsnull;
#ifdef MOZ_REFLOW_PERF
mReflowCountMgr = new ReflowCountMgr();
#endif
}
NS_IMPL_ADDREF(PresShell)
NS_IMPL_RELEASE(PresShell)
nsresult
PresShell::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (!aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsIPresShell))) {
nsIPresShell* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIDocumentObserver))) {
nsIDocumentObserver* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIViewObserver))) {
nsIViewObserver* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIFocusTracker))) {
nsIFocusTracker* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISelectionController))) {
nsISelectionController* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISupportsWeakReference))) {
nsISupportsWeakReference* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISupports))) {
nsIPresShell* tmp = this;
nsISupports* tmp2 = tmp;
*aInstancePtr = (void*) tmp2;
} else {
*aInstancePtr = nsnull;
return NS_NOINTERFACE;
}
NS_ADDREF_THIS();
return NS_OK;
}
PresShell::~PresShell()
{
#ifdef MOZ_REFLOW_PERF
DumpReflows();
if (mReflowCountMgr) {
delete mReflowCountMgr;
mReflowCountMgr = nsnull;
}
#endif
// if we allocated any stack memory free it.
FreeDynamicStack();
mIsDestroying = PR_TRUE;
// Clobber weak leaks in case of re-entrancy during tear down
mHistoryState = nsnull;
// kill subshell map, if any. It holds only weak references
if (mSubShellMap)
{
delete mSubShellMap;
mSubShellMap = nsnull;
}
// release current event content and any content on event stack
NS_IF_RELEASE(mCurrentEventContent);
PRInt32 i, count = mCurrentEventContentStack.Count();
nsIContent* currentEventContent;
for (i = 0; i < count; i++) {
currentEventContent = (nsIContent*)mCurrentEventContentStack.ElementAt(i);
NS_IF_RELEASE(currentEventContent);
}
if (mViewManager) {
// Disable paints during tear down of the frame tree
mViewManager->DisableRefresh();
mViewManager = nsnull;
}
// Destroy the frame manager. This will destroy the frame hierarchy
NS_IF_RELEASE(mFrameManager);
if (mDocument) {
mDocument->DeleteShell(this);
}
// We hold a reference to the pres context, and it holds a weak link back
// to us. To avoid the pres context having a dangling reference, set its
// pres shell to NULL
if (mPresContext) {
mPresContext->SetShell(nsnull);
}
if (mViewEventListener) {
mViewEventListener->SetPresShell((nsIPresShell*)nsnull);
NS_RELEASE(mViewEventListener);
}
// Revoke pending reflow events
if (mPendingReflowEvent) {
mPendingReflowEvent = PR_FALSE;
mEventQueue->RevokeEvents(this);
}
}
/**
* Initialize the presentation shell. Create view manager and style
* manager.
*/
nsresult
PresShell::Init(nsIDocument* aDocument,
nsIPresContext* aPresContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet)
{
NS_PRECONDITION(nsnull != aDocument, "null ptr");
NS_PRECONDITION(nsnull != aPresContext, "null ptr");
NS_PRECONDITION(nsnull != aViewManager, "null ptr");
if ((nsnull == aDocument) || (nsnull == aPresContext) ||
(nsnull == aViewManager)) {
return NS_ERROR_NULL_POINTER;
}
if (mDocument) {
return NS_ERROR_ALREADY_INITIALIZED;
}
mDocument = dont_QueryInterface(aDocument);
mViewManager = aViewManager;
//doesn't add a ref since we own it... MMP
mViewManager->SetViewObserver((nsIViewObserver *)this);
// Bind the context to the presentation shell.
mPresContext = dont_QueryInterface(aPresContext);
aPresContext->SetShell(this);
mStyleSet = dont_QueryInterface(aStyleSet);
mHistoryState = nsnull;
nsresult result = nsComponentManager::CreateInstance(kFrameSelectionCID, nsnull,
NS_GET_IID(nsIFrameSelection),
getter_AddRefs(mSelection));
if (!NS_SUCCEEDED(result))
return result;
// Create and initialize the frame manager
result = NS_NewFrameManager(&mFrameManager);
if (NS_FAILED(result)) {
return result;
}
result = mFrameManager->Init(this, mStyleSet);
if (NS_FAILED(result)) {
return result;
}
result = mSelection->Init((nsIFocusTracker *) this, nsnull);
if (!NS_SUCCEEDED(result))
return result;
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
// make the caret
nsresult err = NS_NewCaret(getter_AddRefs(mCaret));
if (NS_SUCCEEDED(err))
{
mCaret->Init(this);
}
//SetCaretEnabled(PR_TRUE); // make it show in browser windows
#endif
//set up selection to be displayed in document
nsCOMPtr<nsISupports> container;
result = aPresContext->GetContainer(getter_AddRefs(container));
if (NS_SUCCEEDED(result) && container) {
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell){
PRInt32 docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)){
if (nsIDocShellTreeItem::typeContent == docShellType){
SetDisplaySelection(nsISelectionController::SELECTION_ON);
}
}
}
}
// Cache the event queue of the current UI thread
NS_WITH_SERVICE(nsIEventQueueService, eventService, kEventQueueServiceCID, &result);
if (NS_SUCCEEDED(result)) // XXX this implies that the UI is the current thread.
result = eventService->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(mEventQueue));
if (gMaxRCProcessingTime == -1) {
// First, set the defaults
gMaxRCProcessingTime = NS_MAX_REFLOW_TIME;
gAsyncReflowDuringDocLoad = PR_TRUE;
// Get the prefs service
NS_WITH_SERVICE(nsIPref, prefs, kPrefServiceCID, &result);
if (NS_SUCCEEDED(result)) {
prefs->GetIntPref("layout.reflow.timeslice", &gMaxRCProcessingTime);
prefs->GetBoolPref("layout.reflow.async.duringDocLoad", &gAsyncReflowDuringDocLoad);
}
}
// cache the observation service
mObserverService = do_GetService(NS_OBSERVERSERVICE_CONTRACTID,
&result);
if (NS_FAILED(result)) {
return result;
}
// cache the drag service so we can check it during reflows
mDragService = do_GetService("@mozilla.org/widget/dragservice;1");
return NS_OK;
}
// Dynamic stack memory allocation
NS_IMETHODIMP
PresShell::PushStackMemory()
{
if (nsnull == mStackArena)
mStackArena = new StackArena();
return mStackArena->Push();
}
NS_IMETHODIMP
PresShell::PopStackMemory()
{
if (nsnull == mStackArena)
mStackArena = new StackArena();
return mStackArena->Pop();
}
NS_IMETHODIMP
PresShell::AllocateStackMemory(size_t aSize, void** aResult)
{
if (nsnull == mStackArena)
mStackArena = new StackArena();
return mStackArena->Allocate(aSize, aResult);
}
void
PresShell::FreeDynamicStack()
{
if (mStackArena) {
delete mStackArena;
mStackArena = nsnull;
}
}
NS_IMETHODIMP
PresShell::FreeFrame(size_t aSize, void* aPtr)
{
mFrameArena.FreeFrame(aSize, aPtr);
return NS_OK;
}
NS_IMETHODIMP
PresShell::AllocateFrame(size_t aSize, void** aResult)
{
return mFrameArena.AllocateFrame(aSize, aResult);
}
NS_IMETHODIMP
PresShell::GetDocument(nsIDocument** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mDocument;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPresContext(nsIPresContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mPresContext;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetViewManager(nsIViewManager** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mViewManager;
NS_IF_ADDREF(mViewManager);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetStyleSet(nsIStyleSet** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mStyleSet;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetActiveAlternateStyleSheet(nsString& aSheetTitle)
{ // first non-html sheet in style set that has title
if (mStyleSet) {
PRInt32 count = mStyleSet->GetNumberOfDocStyleSheets();
PRInt32 index;
nsAutoString textHtml; textHtml.AssignWithConversion("text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet* sheet = mStyleSet->GetDocStyleSheetAt(index);
if (nsnull != sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (0 < title.Length()) {
aSheetTitle = title;
index = count; // stop looking
}
}
NS_RELEASE(sheet);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::SelectAlternateStyleSheet(const nsString& aSheetTitle)
{
if (mDocument && mStyleSet) {
PRInt32 count = mDocument->GetNumberOfStyleSheets();
PRInt32 index;
nsAutoString textHtml; textHtml.AssignWithConversion("text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet* sheet = mDocument->GetStyleSheetAt(index);
if (nsnull != sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (0 < title.Length()) {
if (title.EqualsIgnoreCase(aSheetTitle)) {
mStyleSet->AddDocStyleSheet(sheet, mDocument);
}
else {
mStyleSet->RemoveDocStyleSheet(sheet);
}
}
}
NS_RELEASE(sheet);
}
}
ReconstructFrames();
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ListAlternateStyleSheets(nsStringArray& aTitleList)
{
if (mDocument) {
PRInt32 count = mDocument->GetNumberOfStyleSheets();
PRInt32 index;
nsAutoString textHtml; textHtml.AssignWithConversion("text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet* sheet = mDocument->GetStyleSheetAt(index);
if (nsnull != sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (0 < title.Length()) {
if (-1 == aTitleList.IndexOfIgnoreCase(title)) {
aTitleList.AppendString(title);
}
}
}
NS_RELEASE(sheet);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetDisplaySelection(PRInt16 aToggle)
{
return mSelection->SetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetDisplaySelection(PRInt16 *aToggle)
{
return mSelection->GetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetSelection(SelectionType aType, nsISelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->GetSelection(aType, aSelection);
}
NS_IMETHODIMP
PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->ScrollSelectionIntoView(aType, aRegion);
}
NS_IMETHODIMP
PresShell::RepaintSelection(SelectionType aType)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->RepaintSelection(mPresContext, aType);
}
NS_IMETHODIMP
PresShell::GetFrameSelection(nsIFrameSelection** aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
*aSelection = mSelection;
(*aSelection)->AddRef();
return NS_OK;
}
// Make shell be a document observer
NS_IMETHODIMP
PresShell::BeginObservingDocument()
{
if (mDocument) {
mDocument->AddObserver(this);
}
return NS_OK;
}
// Make shell stop being a document observer
NS_IMETHODIMP
PresShell::EndObservingDocument()
{
if (mDocument) {
mDocument->RemoveObserver(this);
}
if (mSelection){
nsCOMPtr<nsISelection> domselection;
nsresult result;
result = mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domselection));
if (NS_FAILED(result))
return result;
if (!domselection)
return NS_ERROR_UNEXPECTED;
mSelection->ShutDown();
}
return NS_OK;
}
#ifdef DEBUG_kipp
char* nsPresShell_ReflowStackPointerTop;
#endif
#ifdef INCLUDE_XUL
static void CheckForFocus(nsIDocument* aDocument)
{
// Now that we have a root frame, set focus in to the presshell, but
// only do this if our window is currently focused
// Restore focus if we're the active window or a parent of a previously
// active window.
// XXX The XUL dependency will go away when the focus tracking portion
// of the command dispatcher moves into the embedding layer.
nsCOMPtr<nsIScriptGlobalObject> globalObject;
aDocument->GetScriptGlobalObject(getter_AddRefs(globalObject));
nsCOMPtr<nsIDOMWindowInternal> rootWindow;
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(globalObject);
ourWindow->GetPrivateRoot(getter_AddRefs(rootWindow));
nsCOMPtr<nsIDOMDocument> rootDocument;
rootWindow->GetDocument(getter_AddRefs(rootDocument));
nsCOMPtr<nsIDOMXULCommandDispatcher> commandDispatcher;
nsCOMPtr<nsIDOMXULDocument> xulDoc = do_QueryInterface(rootDocument);
if (xulDoc) {
// See if we have a command dispatcher attached.
xulDoc->GetCommandDispatcher(getter_AddRefs(commandDispatcher));
if (commandDispatcher) {
// Suppress the command dispatcher.
commandDispatcher->SetSuppressFocus(PR_TRUE);
nsCOMPtr<nsIDOMWindowInternal> focusedWindow;
commandDispatcher->GetFocusedWindow(getter_AddRefs(focusedWindow));
// See if the command dispatcher is holding on to an orphan window.
// This happens when you move from an inner frame to an outer frame
// (e.g., _parent, _top)
if (focusedWindow) {
nsCOMPtr<nsIDOMDocument> domDoc;
focusedWindow->GetDocument(getter_AddRefs(domDoc));
if (!domDoc) {
// We're pointing to garbage. Go ahead and let this
// presshell take the focus.
focusedWindow = do_QueryInterface(ourWindow);
commandDispatcher->SetFocusedWindow(focusedWindow);
}
}
nsCOMPtr<nsIDOMWindowInternal> domWindow = do_QueryInterface(ourWindow);
if (domWindow == focusedWindow) {
PRBool active;
commandDispatcher->GetActive(&active);
commandDispatcher->SetFocusedElement(nsnull);
if(active) {
// We need to restore focus and make sure we null
// out the focused element.
domWindow->Focus();
}
}
commandDispatcher->SetSuppressFocus(PR_FALSE);
}
}
}
#endif
nsresult
PresShell::NotifyReflowObservers(const char *aData)
{
if (!aData) { return NS_ERROR_NULL_POINTER; }
nsresult result = NS_OK;
nsCOMPtr<nsISupports> pContainer;
nsCOMPtr<nsIDocShell> pDocShell;
nsAutoString sTopic,
sData;
result = mPresContext->GetContainer( getter_AddRefs( pContainer ) );
if (NS_SUCCEEDED( result ) && pContainer) {
pDocShell = do_QueryInterface( pContainer,
&result );
if (NS_SUCCEEDED( result ) && pDocShell && mObserverService) {
sTopic.AssignWithConversion( NS_PRESSHELL_REFLOW_TOPIC );
sData.AssignWithConversion( aData );
result = mObserverService->Notify( pDocShell,
sTopic.GetUnicode( ),
sData.GetUnicode( ) );
// notice that we don't really care what the observer service returns
}
}
return NS_OK;
}
static nsresult
GetRootScrollFrame(nsIPresContext* aPresContext, nsIFrame* aRootFrame, nsIFrame** aScrollFrame) {
// Frames: viewport->scroll->scrollport (Gfx) or viewport->scroll (Native)
// Types: viewport->scroll->sroll viewport->scroll
// Ensure root frame is a viewport frame
*aScrollFrame = nsnull;
nsIFrame* theFrame = nsnull;
if (aRootFrame) {
nsCOMPtr<nsIAtom> fType;
aRootFrame->GetFrameType(getter_AddRefs(fType));
if (fType && (nsLayoutAtoms::viewportFrame == fType.get())) {
// If child is scrollframe keep it (native)
aRootFrame->FirstChild(aPresContext, nsnull, &theFrame);
if (theFrame) {
nsCOMPtr<nsIAtom> fType;
theFrame->GetFrameType(getter_AddRefs(fType));
if (nsLayoutAtoms::scrollFrame == fType.get()) {
*aScrollFrame = theFrame;
// If the first child of that is scrollframe, use it instead (gfx)
theFrame->FirstChild(aPresContext, nsnull, &theFrame);
if (theFrame) {
nsCOMPtr<nsIAtom> fType;
theFrame->GetFrameType(getter_AddRefs(fType));
if (nsLayoutAtoms::scrollFrame == fType.get()) {
*aScrollFrame = theFrame;
}
}
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
nsIContent* root = nsnull;
#ifdef NS_DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
nsCOMPtr<nsIURI> uri;
if (mDocument) {
uri = dont_AddRef(mDocument->GetDocumentURL());
if (uri) {
char* url = nsnull;
uri->GetSpec(&url);
printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", this, url);
Recycle(url);
}
}
}
#endif
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_INITIAL_REFLOW);
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
WillCauseReflow();
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
if (mDocument) {
root = mDocument->GetRootContent();
}
// Get the root frame from the frame manager
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (nsnull != root) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n", this));
MOZ_TIMER_RESET(mFrameCreationWatch);
MOZ_TIMER_START(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchEnable,mStyleSet);
if (!rootFrame) {
// Have style sheet processor construct a frame for the
// precursors to the root content object's frame
mStyleSet->ConstructRootFrame(mPresContext, root, rootFrame);
mFrameManager->SetRootFrame(rootFrame);
}
#ifdef INCLUDE_XUL
CheckForFocus(mDocument);
#endif
// Have the style sheet processor construct frame for the root
// content object down
mStyleSet->ContentInserted(mPresContext, nsnull, root, 0);
NS_RELEASE(root);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchDisable,mStyleSet);
}
if (rootFrame) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Reflow: PresShell::InitialReflow(), this=%p\n", this));
MOZ_TIMER_RESET(mReflowWatch);
MOZ_TIMER_START(mReflowWatch);
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::InitialReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
mIsReflowing = PR_TRUE;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Initial, rcx, maxSize);
nsIView* view;
rootFrame->WillReflow(mPresContext);
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view);
}
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::InitialReflow"));
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::InitialReflow(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
mIsReflowing = PR_FALSE;
}
DidCauseReflow();
if (mViewManager && mCaret && !mViewEventListener) {
nsIScrollableView* scrollingView = nsnull;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
mViewEventListener = new PresShellViewEventListener;
if (!mViewEventListener)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mViewEventListener);
mViewEventListener->SetPresShell(this);
scrollingView->AddScrollPositionListener((nsIScrollPositionListener *)mViewEventListener);
mViewManager->AddCompositeListener((nsICompositeListener *)mViewEventListener);
}
}
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_RESIZE_REFLOW);
mViewManager->CacheWidgetChanges(PR_TRUE);
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
WillCauseReflow();
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
// If we don't have a root frame yet, that means we haven't had our initial
// reflow...
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::ResizeReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Resize, rcx, maxSize);
nsIView* view;
rootFrame->WillReflow(mPresContext);
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view);
}
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::ResizeReflow"));
// XXX if debugging then we should assert that the cache is empty
} else {
#ifdef NOISY
printf("PresShell::ResizeReflow: null root frame\n");
#endif
}
DidCauseReflow();
// if the proper flag is set, VerifyReflow now
#ifdef NS_DEBUG
if (GetVerifyReflowEnable() && (VERIFY_REFLOW_DURING_RESIZE_REFLOW & gVerifyReflowFlags))
{
mInVerifyReflow = PR_TRUE;
/*PRBool ok = */VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
}
#endif
mViewManager->CacheWidgetChanges(PR_FALSE);
HandlePostedDOMEvents();
HandlePostedAttributeChanges();
HandlePostedReflowCallbacks();
//Send resize event from here.
nsEvent event;
nsEventStatus status;
event.eventStructType = NS_EVENT;
event.message = NS_RESIZE_EVENT;
event.time = 0;
nsCOMPtr<nsIScriptGlobalObject> globalObj;
mDocument->GetScriptGlobalObject(getter_AddRefs(globalObj));
globalObj->HandleDOMEvent(mPresContext, &event, nsnull, NS_EVENT_FLAG_INIT, &status);
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::ScrollFrameIntoView(nsIFrame *aFrame){
if (!aFrame)
return NS_ERROR_NULL_POINTER;
// Before we scroll the frame into view, ask the command dispatcher
// if we're resetting focus because a window just got an activate
// event. If we are, we do not want to scroll the frame into view.
// Example: The user clicks on an anchor, and then deactivates the
// window. When they reactivate the window, the expected behavior
// is not for the anchor link to scroll back into view. That is what
// this check is preventing.
// XXX: The dependency on the command dispatcher needs to be fixed.
nsCOMPtr<nsIContent> content;
aFrame->GetContent(getter_AddRefs(content));
if(content) {
nsCOMPtr<nsIDocument> document;
content->GetDocument(*getter_AddRefs(document));
if(document){
nsCOMPtr<nsIDOMXULCommandDispatcher> commandDispatcher;
nsCOMPtr<nsIScriptGlobalObject> ourGlobal;
document->GetScriptGlobalObject(getter_AddRefs(ourGlobal));
nsCOMPtr<nsIDOMWindowInternal> rootWindow;
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(ourGlobal);
if(ourWindow) {
ourWindow->GetPrivateRoot(getter_AddRefs(rootWindow));
if(rootWindow) {
nsCOMPtr<nsIDOMDocument> rootDocument;
rootWindow->GetDocument(getter_AddRefs(rootDocument));
nsCOMPtr<nsIDOMXULDocument> xulDoc = do_QueryInterface(rootDocument);
if (xulDoc) {
// See if we have a command dispatcher attached.
xulDoc->GetCommandDispatcher(getter_AddRefs(commandDispatcher));
if (commandDispatcher) {
PRBool dontScroll;
commandDispatcher->GetSuppressFocusScroll(&dontScroll);
if(dontScroll)
return NS_OK;
}
}
}
}
}
}
if (IsScrollingEnabled())
return ScrollFrameIntoView(aFrame, NS_PRESSHELL_SCROLL_ANYWHERE,
NS_PRESSHELL_SCROLL_ANYWHERE);
return NS_OK;
}
NS_IMETHODIMP
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame)
{
// Cancel any pending reflow commands targeted at this frame
CancelReflowCommand(aFrame, nsnull);
// Notify the frame manager
if (mFrameManager) {
mFrameManager->NotifyDestroyingFrame(aFrame);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetFrameManager(nsIFrameManager** aFrameManager) const
{
*aFrameManager = mFrameManager;
NS_IF_ADDREF(mFrameManager);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaret(nsICaret **outCaret)
{
if (!outCaret || !mCaret)
return NS_ERROR_NULL_POINTER;
return mCaret->QueryInterface(NS_GET_IID(nsICaret), (void **)outCaret);
}
NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable)
{
nsresult result = NS_OK;
PRBool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
/* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled()
nsCOMPtr<nsIDOMSelection> domSel;
if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel)
mCaret->SetCaretDOMSelection(domSel);
*/
result = mCaret->SetCaretVisible(mCaretEnabled);
}
return result;
}
NS_IMETHODIMP PresShell::SetCaretWidth(PRInt16 pixels)
{
return mCaret->SetCaretWidth(pixels);
}
NS_IMETHODIMP PresShell::SetCaretReadOnly(PRBool aReadOnly)
{
return mCaret->SetCaretReadOnly(aReadOnly);
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled)
{
if (!aOutEnabled) { return NS_ERROR_INVALID_ARG; }
*aOutEnabled = mCaretEnabled;
return NS_OK;
}
NS_IMETHODIMP PresShell::SetDisplayNonTextSelection(PRBool aInEnable)
{
mDisplayNonTextSelection = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP PresShell::GetDisplayNonTextSelection(PRBool *aOutEnable)
{
if (!aOutEnable)
return NS_ERROR_INVALID_ARG;
*aOutEnable = mDisplayNonTextSelection;
return NS_OK;
}
//implementation of nsISelectionController
NS_IMETHODIMP
PresShell::CharacterMove(PRBool aForward, PRBool aExtend)
{
return mSelection->CharacterMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::WordMove(PRBool aForward, PRBool aExtend)
{
return mSelection->WordMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::LineMove(PRBool aForward, PRBool aExtend)
{
return mSelection->LineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::IntraLineMove(PRBool aForward, PRBool aExtend)
{
return mSelection->IntraLineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::PageMove(PRBool aForward, PRBool aExtend)
{
return ScrollPage(aForward);
#if 0
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
}
}
return result;
#endif //0
}
NS_IMETHODIMP
PresShell::ScrollPage(PRBool aForward)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByPages(aForward ? 1 : -1);
}
}
return result;
}
NS_IMETHODIMP
PresShell::ScrollLine(PRBool aForward)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByLines(0, aForward ? 1 : -1);
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
viewManager->ForceUpdate();
}
}
return result;
}
NS_IMETHODIMP
PresShell::ScrollHorizontal(PRBool aLeft)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByLines(aLeft ? -1 : 1, 0);
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
viewManager->ForceUpdate();
}
}
return result;
}
NS_IMETHODIMP
PresShell::CompleteScroll(PRBool aForward)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom
}
}
return result;
}
NS_IMETHODIMP
PresShell::CompleteMove(PRBool aForward, PRBool aExtend)
{
nsCOMPtr<nsIDocument> document;
if (NS_FAILED(GetDocument(getter_AddRefs(document))) || !document)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag; bodyTag.AssignWithConversion("body");
nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(document);
if (!doc)
return NS_ERROR_FAILURE;
nsresult result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if (NS_FAILED(result) || !nodeList)
return result?result:NS_ERROR_NULL_POINTER;
PRUint32 count;
nodeList->GetLength(&count);
if (count < 1)
return NS_ERROR_FAILURE;
// Use the first body node in the list:
nsCOMPtr<nsIDOMNode> node;
result = nodeList->Item(0, getter_AddRefs(node));
if (NS_SUCCEEDED(result) && node)
{
//return node->QueryInterface(NS_GET_IID(nsIDOMElement), (void **)aBodyElement);
// Is above equivalent to this:
nsCOMPtr<nsIDOMElement> bodyElement = do_QueryInterface(node);
if (bodyElement)
{
nsCOMPtr<nsIContent> bodyContent = do_QueryInterface(bodyElement);
if (bodyContent)
{
PRInt32 offset = 0;
if (aForward)
{
bodyContent->ChildCount(offset);
}
result = mSelection->HandleClick(bodyContent,offset,offset,aExtend, PR_FALSE,aExtend);
}
}
}
return result;
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
NS_IMETHODIMP
PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval)
{
if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0)
return NS_ERROR_INVALID_ARG;
*_retval = PR_FALSE; //initialize return parameter
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return NS_ERROR_FAILURE;
nsIFrame *frame;
nsresult result = GetPrimaryFrameFor(content,&frame);
if (NS_FAILED(result)) //failure is taken as a no.
return result;
if (!frame) //no frame to look at so it must not be visible
return NS_OK;
//start process now to go through all frames to find startOffset. then check chars after that to see
//if anything until EndOffset is visible.
PRBool finished = PR_FALSE;
frame->CheckVisibility(mPresContext,startOffset,EndOffset,PR_TRUE,&finished, _retval);
return NS_OK;//dont worry about other return val
}
//end implementations nsISelectionController
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
// notify any presshell observers about the reflow.
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_STYLE_CHANGE_REFLOW);
WillCauseReflow();
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::StyleChangeReflow"));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_StyleChange, rcx, maxSize);
nsIView* view;
rootFrame->WillReflow(mPresContext);
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view);
}
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow"));
}
DidCauseReflow();
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::GetRootFrame(nsIFrame** aResult) const
{
return mFrameManager->GetRootFrame(aResult);
}
NS_IMETHODIMP
PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsIFrame* rootFrame;
nsIFrame* child;
nsIPageSequenceFrame* pageSequence = nsnull;
// The page sequence frame is the child of the rootFrame
mFrameManager->GetRootFrame(&rootFrame);
rootFrame->FirstChild(mPresContext, nsnull, &child);
if (nsnull != child) {
// but the child could be wrapped in a scrollframe so lets check
nsIScrollableFrame* scrollable = nsnull;
nsresult rv = child->QueryInterface(NS_GET_IID(nsIScrollableFrame),
(void **)&scrollable);
if (NS_SUCCEEDED(rv) && (nsnull != scrollable)) {
// if it is then get the scrolled frame
scrollable->GetScrolledFrame(nsnull, child);
}
// make sure the child is a pageSequence
rv = child->QueryInterface(NS_GET_IID(nsIPageSequenceFrame),
(void**)&pageSequence);
NS_ASSERTION(NS_SUCCEEDED(rv),"Error: Could not find pageSequence!");
*aResult = pageSequence;
return NS_OK;
}
*aResult = nsnull;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
PresShell::BeginUpdate(nsIDocument *aDocument)
{
mUpdateCount++;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndUpdate(nsIDocument *aDocument)
{
NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's");
if (--mUpdateCount == 0) {
// XXX do something here
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginLoad(nsIDocument *aDocument)
{
#ifdef MOZ_PERF_METRICS
// Reset style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", this));
CtlStyleWatch(kStyleWatchReset,mStyleSet);
#endif
mDocumentLoading = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndLoad(nsIDocument *aDocument)
{
// Restore frame state for the root scroll frame
nsIFrame* rootFrame = nsnull;
GetRootFrame(&rootFrame);
if (rootFrame && mHistoryState) {
nsIFrame* scrollFrame = nsnull;
GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
mFrameManager->RestoreFrameStateFor(mPresContext, scrollFrame, mHistoryState, nsIStatefulFrame::eDocumentScrollState);
}
}
#ifdef MOZ_PERF_METRICS
// Dump reflow, style resolution and frame construction times here.
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
MOZ_TIMER_LOG(("Reflow time (this=%p): ", this));
MOZ_TIMER_PRINT(mReflowWatch);
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
MOZ_TIMER_LOG(("Frame construction plus style resolution time (this=%p): ", this));
MOZ_TIMER_PRINT(mFrameCreationWatch);
// Print style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this));
CtlStyleWatch(kStyleWatchStop|kStyleWatchDisable, mStyleSet);
MOZ_TIMER_LOG(("Style resolution time (this=%p): ", this));
CtlStyleWatch(kStyleWatchPrint, mStyleSet);
#endif
mDocumentLoading = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell)
{
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndReflow(nsIDocument *aDocument, nsIPresShell* aShell)
{
return NS_OK;
}
// aReflowCommand is considered to be already in the queue if the
// frame it targets is targeted by a pre-existing reflow command in
// the queue.
PRBool
PresShell::AlreadyInQueue(nsIReflowCommand* aReflowCommand)
{
PRInt32 i, n = mReflowCommands.Count();
nsIFrame* targetFrame;
PRBool inQueue = PR_FALSE;
if (NS_SUCCEEDED(aReflowCommand->GetTarget(targetFrame))) {
// Iterate over the reflow commands and compare the targeted frames.
for (i = 0; i < n; i++) {
nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(i);
if (rc) {
nsIFrame* targetOfQueuedRC;
if (NS_SUCCEEDED(rc->GetTarget(targetOfQueuedRC))) {
nsIReflowCommand::ReflowType RCType;
nsIReflowCommand::ReflowType queuedRCType;
aReflowCommand->GetType(RCType);
rc->GetType(queuedRCType);
if (targetFrame == targetOfQueuedRC &&
RCType == queuedRCType) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("*** PresShell::AlreadyInQueue(): Discarding reflow command: this=%p\n", this);
aReflowCommand->List(stdout);
}
#endif
inQueue = PR_TRUE;
break;
}
}
}
}
}
return inQueue;
}
NS_IMETHODIMP
PresShell::AppendReflowCommand(nsIReflowCommand* aReflowCommand)
{
#ifdef DEBUG
//printf("gShellCounter: %d\n", gShellCounter++);
if (mInVerifyReflow) {
return NS_OK;
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\nPresShell@%p: adding reflow command\n", this);
aReflowCommand->List(stdout);
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf("Current content model:\n");
nsCOMPtr<nsIContent> rootContent;
rootContent = getter_AddRefs(mDocument->GetRootContent());
if (rootContent) {
rootContent->List(stdout, 0);
}
}
}
#endif
// Add the reflow command to the queue
nsresult rv = NS_OK;
if (!AlreadyInQueue(aReflowCommand)) {
NS_ADDREF(aReflowCommand);
rv = (mReflowCommands.AppendElement(aReflowCommand) ? NS_OK : NS_ERROR_OUT_OF_MEMORY);
ReflowCommandAdded(aReflowCommand);
}
// For async reflow during doc load, post a reflow event if we are not batching reflow commands.
// For sync reflow during doc load, post a reflow event if we are not batching reflow commands
// and the document is not loading.
if ((gAsyncReflowDuringDocLoad && !mBatchReflows) ||
(!gAsyncReflowDuringDocLoad && !mBatchReflows && !mDocumentLoading)) {
// If we're in the middle of a drag, process it right away (needed for mac,
// might as well do it on all platforms just to keep the code paths the same).
if ( IsDragInProgress() )
FlushPendingNotifications();
else
PostReflowEvent();
}
return rv;
}
//
// IsDragInProgress
//
// Ask the drag service if we're in the middle of a drag
//
PRBool
PresShell :: IsDragInProgress ( ) const
{
PRBool dragInProgress = PR_FALSE;
if ( mDragService ) {
nsCOMPtr<nsIDragSession> session;
mDragService->GetCurrentSession ( getter_AddRefs(session) );
if ( session )
dragInProgress = PR_TRUE;
}
return dragInProgress;
} // IsDragInProgress
NS_IMETHODIMP
PresShell::CancelReflowCommand(nsIFrame* aTargetFrame, nsIReflowCommand::ReflowType* aCmdType)
{
PRInt32 i, n = mReflowCommands.Count();
for (i = 0; i < n; i++) {
nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(i);
if (rc) {
nsIFrame* target;
if (NS_SUCCEEDED(rc->GetTarget(target))) {
if (target == aTargetFrame) {
if (aCmdType != NULL) {
// If aCmdType is specified, only remove reflow commands of that type
nsIReflowCommand::ReflowType type;
if (NS_SUCCEEDED(rc->GetType(type))) {
if (type != *aCmdType)
continue;
}
}
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("PresShell: removing rc=%p for frame ", rc);
nsFrame::ListTag(stdout, aTargetFrame);
printf("\n");
}
#endif
mReflowCommands.RemoveElementAt(i);
ReflowCommandRemoved(rc);
NS_RELEASE(rc);
n--;
i--;
continue;
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelAllReflowCommands()
{
PRInt32 n = mReflowCommands.Count();
nsIReflowCommand* rc;
for (PRInt32 i = 0; i < n; i++) {
rc = NS_STATIC_CAST(nsIReflowCommand*, mReflowCommands.ElementAt(0));
mReflowCommands.RemoveElementAt(0);
ReflowCommandRemoved(rc);
NS_RELEASE(rc);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
manager->ClearFrameRefs(aFrame);
NS_RELEASE(manager);
}
if (mCaret) {
mCaret->ClearFrameRefs(aFrame);
}
if (aFrame == mCurrentEventFrame) {
aFrame->GetContent(&mCurrentEventContent);
mCurrentEventFrame = nsnull;
}
for (int i=0; i<mCurrentEventFrameStack.Count(); i++) {
if (aFrame == (nsIFrame*)mCurrentEventFrameStack.ElementAt(i)) {
//One of our stack frames was deleted. Get its content so that when we
//pop it we can still get its new frame from its content
nsIContent *currentEventContent;
aFrame->GetContent(&currentEventContent);
mCurrentEventContentStack.ReplaceElementAt((void*)currentEventContent, i);
mCurrentEventFrameStack.ReplaceElementAt(nsnull, i);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsIView *view = nsnull;
nsPoint pt;
nsresult rv;
aFrame->GetView(mPresContext, &view);
if (nsnull == view)
aFrame->GetOffsetFromView(mPresContext, pt, &view);
nsCOMPtr<nsIWidget> widget;
if (nsnull != view) {
nsCOMPtr<nsIViewManager> vm;
view->GetViewManager(*getter_AddRefs(vm));
vm->GetWidgetForView(view, getter_AddRefs(widget));
}
nsCOMPtr<nsIDeviceContext> dx;
nsIRenderingContext* result = nsnull;
rv = mPresContext->GetDeviceContext(getter_AddRefs(dx));
if (NS_SUCCEEDED(rv) && dx) {
if (nsnull != widget) {
rv = dx->CreateRenderingContext(widget, result);
}
else {
rv = dx->CreateRenderingContext(result);
}
}
*aResult = result;
return rv;
}
NS_IMETHODIMP
PresShell::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
if (mFrameManager) {
return mFrameManager->CantRenderReplacedElement(aPresContext, aFrame);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GoToAnchor(const nsString& aAnchorName) const
{
nsCOMPtr<nsIDOMDocument> doc;
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(mDocument->QueryInterface(NS_GET_IID(nsIDOMDocument),
getter_AddRefs(doc)))) {
nsCOMPtr<nsIDOMElement> element;
// Find the element with the specified id
rv = doc->GetElementById(aAnchorName, getter_AddRefs(element));
if (NS_SUCCEEDED(rv) && element) {
// Get the nsIContent interface, because that's what we need to
// get the primary frame
rv = element->QueryInterface(NS_GET_IID(nsIContent),
getter_AddRefs(content));
}
}
if (NS_SUCCEEDED(rv) && content) {
nsIFrame* frame;
// Get the primary frame
if (NS_SUCCEEDED(GetPrimaryFrameFor(content, &frame))) {
rv = ScrollFrameIntoView(frame, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE);
}
} else {
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
PresShell::ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const
{
nsresult rv = NS_OK;
if (!aFrame) {
return NS_ERROR_NULL_POINTER;
}
// Before we scroll the frame into view, ask the command dispatcher
// if we're resetting focus because a window just got an activate
// event. If we are, we do not want to scroll the frame into view.
// Example: The user clicks on an anchor, and then deactivates the
// window. When they reactivate the window, the expected behavior
// is not for the anchor link to scroll back into view. That is what
// this check is preventing.
// XXX: The dependency on the command dispatcher needs to be fixed.
nsCOMPtr<nsIContent> content;
aFrame->GetContent(getter_AddRefs(content));
if(content) {
nsCOMPtr<nsIDocument> document;
content->GetDocument(*getter_AddRefs(document));
if(document){
nsCOMPtr<nsIDOMXULCommandDispatcher> commandDispatcher;
nsCOMPtr<nsIScriptGlobalObject> ourGlobal;
document->GetScriptGlobalObject(getter_AddRefs(ourGlobal));
nsCOMPtr<nsIDOMWindowInternal> rootWindow;
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(ourGlobal);
if(ourWindow) {
ourWindow->GetPrivateRoot(getter_AddRefs(rootWindow));
if(rootWindow) {
nsCOMPtr<nsIDOMDocument> rootDocument;
rootWindow->GetDocument(getter_AddRefs(rootDocument));
nsCOMPtr<nsIDOMXULDocument> xulDoc = do_QueryInterface(rootDocument);
if (xulDoc) {
// See if we have a command dispatcher attached.
xulDoc->GetCommandDispatcher(getter_AddRefs(commandDispatcher));
if (commandDispatcher) {
PRBool dontScroll;
commandDispatcher->GetSuppressFocusScroll(&dontScroll);
if(dontScroll)
return NS_OK;
}
}
}
}
}
}
if (mViewManager) {
// Get the viewport scroller
nsIScrollableView* scrollingView;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
nsIView* scrolledView;
nsPoint offset;
nsIView* closestView;
// Determine the offset from aFrame to the scrolled view. We do that by
// getting the offset from its closest view and then walking up
scrollingView->GetScrolledView(scrolledView);
aFrame->GetOffsetFromView(mPresContext, offset, &closestView);
// XXX Deal with the case where there is a scrolled element, e.g., a
// DIV in the middle...
while ((closestView != nsnull) && (closestView != scrolledView)) {
nscoord x, y;
// Update the offset
closestView->GetPosition(&x, &y);
offset.MoveBy(x, y);
// Get its parent view
closestView->GetParent(closestView);
}
// Determine the visible rect in the scrolled view's coordinate space.
// The size of the visible area is the clip view size
const nsIView* clipView;
nsRect visibleRect;
scrollingView->GetScrollPosition(visibleRect.x, visibleRect.y);
scrollingView->GetClipView(&clipView);
clipView->GetDimensions(&visibleRect.width, &visibleRect.height);
// The actual scroll offsets
nscoord scrollOffsetX = visibleRect.x;
nscoord scrollOffsetY = visibleRect.y;
// The frame's bounds in the coordinate space of the scrolled frame
nsRect frameBounds;
aFrame->GetRect(frameBounds);
frameBounds.x = offset.x;
frameBounds.y = offset.y;
// See how the frame should be positioned vertically
if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent) {
// The caller doesn't care where the frame is positioned vertically,
// so long as it's fully visible
if (frameBounds.y < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = frameBounds.y;
} else if (frameBounds.YMost() > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += frameBounds.YMost() - visibleRect.YMost();
if (scrollOffsetY > frameBounds.y) {
scrollOffsetY = frameBounds.y;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) {
// Scroll only if no part of the frame is visible in this view
if (frameBounds.YMost() < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = frameBounds.y;
} else if (frameBounds.y > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += frameBounds.YMost() - visibleRect.YMost();
if (scrollOffsetY > frameBounds.y) {
scrollOffsetY = frameBounds.y;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignY = frameBounds.y + (frameBounds.height * aVPercent) / 100;
scrollOffsetY = frameAlignY - (visibleRect.height * aVPercent) / 100;
}
// See how the frame should be positioned horizontally
if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent) {
// The caller doesn't care where the frame is positioned horizontally,
// so long as it's fully visible
if (frameBounds.x < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = frameBounds.x;
} else if (frameBounds.XMost() > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += frameBounds.XMost() - visibleRect.XMost();
if (scrollOffsetX > frameBounds.x) {
scrollOffsetX = frameBounds.x;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) {
// Scroll only if no part of the frame is visible in this view
if (frameBounds.XMost() < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = frameBounds.x;
} else if (frameBounds.x > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += frameBounds.XMost() - visibleRect.XMost();
if (scrollOffsetX > frameBounds.x) {
scrollOffsetX = frameBounds.x;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignX = frameBounds.x + (frameBounds.width * aHPercent) / 100;
scrollOffsetX = frameAlignX - (visibleRect.width * aHPercent) / 100;
}
if (scrollOffsetX != 0 || scrollOffsetY != 0) {
scrollingView->ScrollTo(scrollOffsetX, scrollOffsetY, NS_VMREFRESH_IMMEDIATE);
}
}
}
return rv;
}
NS_IMETHODIMP
PresShell::DoCopy()
{
nsCOMPtr<nsIDocument> doc;
GetDocument(getter_AddRefs(doc));
if (!doc) return NS_ERROR_FAILURE;
nsString buffer;
nsresult rv;
nsCOMPtr<nsISelection> sel;
nsCOMPtr<nsIEventStateManager> manager;
nsCOMPtr<nsIContent> content;
rv = mPresContext->GetEventStateManager(getter_AddRefs(manager));
if (NS_FAILED(rv) || !manager)
return rv?rv:NS_ERROR_FAILURE;
rv = manager->GetFocusedContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv) && content)
{
//check to see if we need to get selection from frame
//optimization that MAY need to be expanded as more things implement their own "selection"
nsCOMPtr<nsIDOMNSHTMLInputElement> htmlInputElement(do_QueryInterface(content));
nsCOMPtr<nsIDOMNSHTMLTextAreaElement> htmlTextAreaElement(do_QueryInterface(content));
if (htmlInputElement || htmlTextAreaElement)
{
nsIFrame *htmlInputFrame;
rv = GetPrimaryFrameFor(content, &htmlInputFrame);
if (NS_FAILED(rv) || !htmlInputFrame)
return rv?rv:NS_ERROR_FAILURE;
nsCOMPtr<nsISelectionController> selCon;
rv = htmlInputFrame->GetSelectionController(mPresContext,getter_AddRefs(selCon));
if (NS_FAILED(rv) || !selCon)
return rv?rv:NS_ERROR_FAILURE;
rv = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
}
}
if (!sel) //get selection from this PresShell
rv = GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
if (NS_FAILED(rv) || !sel)
return rv?rv:NS_ERROR_FAILURE;
// Now we have the selection. Make sure it's nonzero:
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
doc->CreateXIF(buffer,sel);
// Get the Clipboard
NS_WITH_SERVICE(nsIClipboard, clipboard, kCClipboardCID, &rv);
if (NS_FAILED(rv))
return rv;
if ( clipboard ) {
// Create a transferable for putting data on the Clipboard
nsCOMPtr<nsITransferable> trans;
rv = nsComponentManager::CreateInstance(kCTransferableCID, nsnull,
NS_GET_IID(nsITransferable),
getter_AddRefs(trans));
if ( trans ) {
// The data on the clipboard will be in "XIF" format
// so give the clipboard transferable a "XIFConverter" for
// converting from XIF to other formats
nsCOMPtr<nsIFormatConverter> xifConverter;
rv = nsComponentManager::CreateInstance(kCXIFConverterCID, nsnull,
NS_GET_IID(nsIFormatConverter),
getter_AddRefs(xifConverter));
if ( xifConverter ) {
// Add the XIF DataFlavor to the transferable
// this tells the transferable that it can handle receiving the XIF format
trans->AddDataFlavor(kXIFMime);
// Add the converter for going from XIF to other formats
trans->SetConverter(xifConverter);
// Now add the XIF data to the transferable, placing it into a nsISupportsWString object.
// the transferable wants the number bytes for the data and since it is double byte
// we multiply by 2.
nsCOMPtr<nsISupportsWString> dataWrapper;
rv = nsComponentManager::CreateInstance(NS_SUPPORTS_WSTRING_CONTRACTID,
nsnull,
NS_GET_IID(nsISupportsWString),
getter_AddRefs(dataWrapper));
if ( dataWrapper ) {
dataWrapper->SetData ( NS_CONST_CAST(PRUnichar*,buffer.GetUnicode()) );
// QI the data object an |nsISupports| so that when the transferable holds
// onto it, it will addref the correct interface.
nsCOMPtr<nsISupports> genericDataObj ( do_QueryInterface(dataWrapper) );
trans->SetTransferData(kXIFMime, genericDataObj, buffer.Length()*2);
}
// put the transferable on the clipboard
clipboard->SetData(trans, nsnull, nsIClipboard::kGlobalClipboard);
}
}
}
// Now that we have copied, update the Paste menu item
nsCOMPtr<nsIScriptGlobalObject> globalObject;
doc->GetScriptGlobalObject(getter_AddRefs(globalObject));
nsCOMPtr<nsIDOMWindowInternal> domWindow = do_QueryInterface(globalObject);
if (domWindow)
{
domWindow->UpdateCommands(NS_ConvertASCIItoUCS2("clipboard"));
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPage)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
if (!mHistoryState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(aState); // This addrefs
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
mHistoryState = *aState;
}
else {
*aState = mHistoryState;
NS_IF_ADDREF(mHistoryState);
}
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = nsnull;
rv = GetRootFrame(&rootFrame);
if (NS_FAILED(rv) || nsnull == rootFrame) return rv;
// Capture frame state for the root scroll frame
// Don't capture state when first creating doc element heirarchy
// As the scroll position is 0 and this will cause us to loose
// our previously saved place!
if (aLeavingPage) {
nsIFrame* scrollFrame = nsnull;
rv = GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
rv = mFrameManager->CaptureFrameStateFor(mPresContext, scrollFrame, mHistoryState, nsIStatefulFrame::eDocumentScrollState);
}
}
rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, mHistoryState);
return rv;
}
NS_IMETHODIMP
PresShell::GetHistoryState(nsILayoutHistoryState** aState)
{
NS_IF_ADDREF(mHistoryState);
*aState = mHistoryState;
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState)
{
mHistoryState = aLayoutHistoryState;
return NS_OK;
}
static PRBool
IsGeneratedContentFrame(nsIFrame* aFrame)
{
nsFrameState frameState;
aFrame->GetFrameState(&frameState);
return (frameState & NS_FRAME_GENERATED_CONTENT) != 0;
}
static PRBool
IsPseudoFrame(nsIFrame* aFrame, nsIContent* aParentContent)
{
nsCOMPtr<nsIContent> content;
aFrame->GetContent(getter_AddRefs(content));
return content.get() == aParentContent;
}
static nsIFrame*
GetFirstChildFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIContent* aContent)
{
nsIFrame* childFrame;
// Get the first child frame
aFrame->FirstChild(aPresContext, nsnull, &childFrame);
// If the child frame is a pseudo-frame, then return its first child.
// Note that the frame we create for the generated content is also a
// pseudo-frame and so don't drill down in that case
if (childFrame && IsPseudoFrame(childFrame, aContent) &&
!IsGeneratedContentFrame(childFrame)) {
return GetFirstChildFrame(aPresContext, childFrame, aContent);
}
return childFrame;
}
static nsIFrame*
GetLastChildFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIContent* aContent)
{
NS_PRECONDITION(aFrame, "NULL frame pointer");
// Get the last in flow frame
nsIFrame* lastInFlow;
while (aFrame) {
lastInFlow = aFrame;
lastInFlow->GetNextInFlow(&aFrame);
}
// Get the last child frame
nsIFrame* firstChildFrame;
lastInFlow->FirstChild(aPresContext, nsnull, &firstChildFrame);
if (firstChildFrame) {
nsFrameList frameList(firstChildFrame);
nsIFrame* lastChildFrame = frameList.LastChild();
NS_ASSERTION(lastChildFrame, "unexpected error");
// Get the frame's first-in-flow. This matters in case the frame has
// been continuted across multiple lines
while (PR_TRUE) {
nsIFrame* prevInFlow;
lastChildFrame->GetPrevInFlow(&prevInFlow);
if (prevInFlow) {
lastChildFrame = prevInFlow;
} else {
break;
}
}
// If the last child frame is a pseudo-frame, then return its last child.
// Note that the frame we create for the generated content is also a
// pseudo-frame and so don't drill down in that case
if (lastChildFrame && IsPseudoFrame(lastChildFrame, aContent) &&
!IsGeneratedContentFrame(lastChildFrame)) {
return GetLastChildFrame(aPresContext, lastChildFrame, aContent);
}
return lastChildFrame;
}
return nsnull;
}
NS_IMETHODIMP
PresShell::GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const
{
nsIFrame* primaryFrame;
nsresult rv = NS_OK;
// Initialize OUT parameter
*aIterator = nsnull;
// Get the primary frame associated with the content object
GetPrimaryFrameFor(aContent, &primaryFrame);
if (primaryFrame) {
// See whether it's a request for the before or after generated content
if (Before == aType) {
// The most efficient thing to do is to get the first child frame,
// and see if it is associated with generated content
nsIFrame* firstChildFrame = GetFirstChildFrame(mPresContext, primaryFrame, aContent);
if (firstChildFrame && IsGeneratedContentFrame(firstChildFrame)) {
// Create an iterator
rv = NS_NewGeneratedContentIterator(mPresContext, firstChildFrame, aIterator);
}
} else {
// Avoid finding the last child frame unless we need to. Instead probe
// for the existence of the pseudo-element
nsCOMPtr<nsIStyleContext> styleContext;
nsCOMPtr<nsIStyleContext> pseudoStyleContext;
primaryFrame->GetStyleContext(getter_AddRefs(styleContext));
mPresContext->ProbePseudoStyleContextFor(aContent, nsCSSAtoms::afterPseudo,
styleContext, PR_FALSE,
getter_AddRefs(pseudoStyleContext));
if (pseudoStyleContext) {
nsIFrame* lastChildFrame = GetLastChildFrame(mPresContext, primaryFrame, aContent);
if (lastChildFrame)
{ // it is now legal for GetLastChildFrame to return null. see bug 52307 (a regression from bug 18754)
// in the case of a null child frame, we treat the frame as having no "after" style
// the "before" handler above already does this check
NS_ASSERTION(IsGeneratedContentFrame(lastChildFrame),
"can't find generated content frame");
// Create an iterator
rv = NS_NewGeneratedContentIterator(mPresContext, lastChildFrame, aIterator);
}
}
}
}
return rv;
}
// Post a request to handle an arbitrary callback after reflow has finished.
NS_IMETHODIMP
PresShell::PostReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsCallbackEventRequest), &result);
request = (nsCallbackEventRequest*)result;
request->callback = aCallback;
NS_ADDREF(aCallback);
request->next = nsnull;
if (mLastCallbackEventRequest) {
mLastCallbackEventRequest = mLastCallbackEventRequest->next = request;
} else {
mFirstCallbackEventRequest = request;
mLastCallbackEventRequest = request;
}
return NS_OK;
}
/**
* Post a request to handle a DOM event after Reflow has finished.
* The event must have been created with the "new" operator.
*/
NS_IMETHODIMP
PresShell::PostDOMEvent(nsIContent* aContent, nsEvent* aEvent)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsDOMEventRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsDOMEventRequest), &result);
request = (nsDOMEventRequest*)result;
request->content = aContent;
NS_ADDREF(aContent);
request->event = aEvent;
request->next = nsnull;
if (mLastDOMEventRequest) {
mLastDOMEventRequest = mLastDOMEventRequest->next = request;
} else {
mFirstDOMEventRequest = request;
mLastDOMEventRequest = request;
}
return NS_OK;
}
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHODIMP
PresShell::PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsAttributeChangeRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsAttributeChangeRequest), &result);
request = (nsAttributeChangeRequest*)result;
request->content = aContent;
NS_ADDREF(aContent);
request->nameSpaceID = aNameSpaceID;
request->name = aName;
request->value = aValue;
request->notify = aNotify;
request->type = aType;
request->next = nsnull;
if (mLastAttributeRequest) {
mLastAttributeRequest = mLastAttributeRequest->next = request;
} else {
mFirstAttributeRequest = request;
mLastAttributeRequest = request;
}
return NS_OK;
}
void
PresShell::HandlePostedReflowCallbacks()
{
PRBool shouldFlush = PR_FALSE;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
nsCallbackEventRequest* toFree = node;
node = node->next;
mFirstCallbackEventRequest = node;
FreeFrame(sizeof(nsCallbackEventRequest), toFree);
callback->ReflowFinished(this, &shouldFlush);
NS_RELEASE(callback);
}
mFirstCallbackEventRequest = mLastCallbackEventRequest = nsnull;
if (shouldFlush)
FlushPendingNotifications();
}
void
PresShell::HandlePostedDOMEvents()
{
while(mFirstDOMEventRequest)
{
/* pull the node from the event request list. Be prepared for reentrant access to the list
from within HandleDOMEvent and its callees! */
nsDOMEventRequest* node = mFirstDOMEventRequest;
nsEventStatus status = nsEventStatus_eIgnore;
mFirstDOMEventRequest = node->next;
if (nsnull == mFirstDOMEventRequest) {
mLastDOMEventRequest = nsnull;
}
node->content->HandleDOMEvent(mPresContext, node->event, nsnull, NS_EVENT_FLAG_INIT, &status);
NS_RELEASE(node->content);
delete node->event;
node->nsDOMEventRequest::~nsDOMEventRequest(); // doesn't do anything, but just in case
FreeFrame(sizeof(nsDOMEventRequest), node);
}
}
void
PresShell::HandlePostedAttributeChanges()
{
while(mFirstAttributeRequest)
{
/* pull the node from the request list. Be prepared for reentrant access to the list
from within SetAttribute/UnsetAttribute and its callees! */
nsAttributeChangeRequest* node = mFirstAttributeRequest;
mFirstAttributeRequest = node->next;
if (nsnull == mFirstAttributeRequest) {
mLastAttributeRequest = nsnull;
}
if (node->type == eChangeType_Set)
node->content->SetAttribute(node->nameSpaceID, node->name, node->value, node->notify);
else
node->content->UnsetAttribute(node->nameSpaceID, node->name, node->notify);
NS_RELEASE(node->content);
node->nsAttributeChangeRequest::~nsAttributeChangeRequest();
FreeFrame(sizeof(nsAttributeChangeRequest), node);
}
}
NS_IMETHODIMP
PresShell::FlushPendingNotifications()
{
if (!mIsReflowing) {
ProcessReflowCommands(PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsReflowLocked(PRBool* aIsReflowLocked)
{
*aIsReflowLocked = mIsReflowing;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginReflowBatching()
{
mBatchReflows = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndReflowBatching(PRBool aFlushPendingReflows)
{
nsresult rv = NS_OK;
mBatchReflows = PR_FALSE;
if (aFlushPendingReflows) {
rv = FlushPendingNotifications();
}
return rv;
}
NS_IMETHODIMP
PresShell::GetReflowBatchingStatus(PRBool* aIsBatching)
{
*aIsBatching = mBatchReflows;
return NS_OK;
}
NS_IMETHODIMP
PresShell::ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentStatesChanged(mPresContext, aContent1, aContent2);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint)
{
WillCauseReflow();
nsresult rv = mStyleSet->AttributeChanged(mPresContext, aContent, aNameSpaceID, aAttribute, aHint);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
WillCauseReflow();
MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_START(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchEnable,mStyleSet);
nsresult rv = mStyleSet->ContentAppended(mPresContext, aContainer, aNewIndexInContainer);
VERIFY_STYLE_TREE;
if (NS_SUCCEEDED(rv) && nsnull != mHistoryState) {
// If history state has been set by session history, ask the frame manager
// to restore frame state for the frame hierarchy created for the chunk of
// content that just came in.
nsIFrame* frame;
rv = GetPrimaryFrameFor(aContainer, &frame);
if (NS_SUCCEEDED(rv) && nsnull != frame)
mFrameManager->RestoreFrameState(mPresContext, frame, mHistoryState);
}
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchDisable,mStyleSet);
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentInserted(mPresContext, aContainer, aChild, aIndexInContainer);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentReplaced(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentReplaced(mPresContext, aContainer, aOldChild,
aNewChild, aIndexInContainer);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentRemoved(mPresContext, aContainer,
aChild, aIndexInContainer);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
nsresult
PresShell::ReconstructFrames(void)
{
nsresult rv = NS_OK;
WillCauseReflow();
rv = mStyleSet->ReconstructDocElementHierarchy(mPresContext);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleSheetDisabledStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDisabled)
{
nsresult rv = NS_OK;
// first notify the style set that a sheet's state has changed
if (mStyleSet) {
rv = mStyleSet->NotifyStyleSheetStateChanged(aDisabled ? PR_FALSE : PR_TRUE);
}
if (NS_FAILED(rv)) return rv;
// rebuild the frame-world
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleChanged(mPresContext, aStyleSheet,
aStyleRule, aHint);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleAdded(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
DidCauseReflow();
if (NS_FAILED(rv)) {
return rv;
}
// XXX For now reconstruct everything
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleRemoved(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
DidCauseReflow();
if (NS_FAILED(rv)) {
return rv;
}
// XXX For now reconstruct everything
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::DocumentWillBeDestroyed(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aResult) const
{
nsresult rv;
if (mFrameManager) {
rv = mFrameManager->GetPrimaryFrameFor(aContent, aResult);
} else {
*aResult = nsnull;
rv = NS_OK;
}
return rv;
}
NS_IMETHODIMP
PresShell::GetStyleContextFor(nsIFrame* aFrame,
nsIStyleContext** aStyleContext) const
{
if (!aFrame || !aStyleContext) {
return NS_ERROR_NULL_POINTER;
}
return (aFrame->GetStyleContext(aStyleContext));
}
NS_IMETHODIMP
PresShell::GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const
{
nsresult result = NS_ERROR_NULL_POINTER;
if ((nsnull!=aResult) && (nsnull!=aContent))
{
*aResult = nsnull;
nsIFrame *primaryFrame=nsnull;
result = GetPrimaryFrameFor(aContent, &primaryFrame);
if ((NS_SUCCEEDED(result)) && (nsnull!=primaryFrame))
{
result = primaryFrame->QueryInterface(NS_GET_IID(nsISupports),
(void**)aResult);
}
}
return result;
}
NS_IMETHODIMP
PresShell::GetSubShellFor(nsIContent* aContent,
nsISupports** aResult) const
{
NS_ENSURE_ARG_POINTER(aContent);
NS_ENSURE_ARG_POINTER(aResult);
*aResult = nsnull;
if (mSubShellMap) {
mSubShellMap->Search(aContent, 0, (void**)aResult);
if (*aResult) {
NS_ADDREF(*aResult);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetSubShellFor(nsIContent* aContent,
nsISupports* aSubShell)
{
NS_ENSURE_ARG_POINTER(aContent);
// If aSubShell is NULL, then remove the mapping
if (!aSubShell) {
if (mSubShellMap) {
mSubShellMap->Remove(aContent);
}
} else {
// Create a new DST if necessary
if (!mSubShellMap) {
if (!mDSTNodeArena) {
mDSTNodeArena = nsDST::NewMemoryArena();
if (!mDSTNodeArena) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
mSubShellMap = new nsDST(mDSTNodeArena);
if (!mSubShellMap) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
// Add a mapping to the hash table
mSubShellMap->Insert(aContent, (void*)aSubShell, nsnull);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
nsresult rv;
if (mFrameManager) {
rv = mFrameManager->GetPlaceholderFrameFor(aFrame, aResult);
} else {
*aResult = nsnull;
rv = NS_OK;
}
return rv;
}
//nsIViewObserver
// If the element is absolutely positioned and has a specified clip rect
// then it pushes the current rendering context and sets the clip rect.
// Returns PR_TRUE if the clip rect is set and PR_FALSE otherwise
static PRBool
SetClipRect(nsIRenderingContext& aRenderingContext, nsIFrame* aFrame)
{
PRBool clipState;
const nsStyleDisplay* display;
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
const nsStylePosition* position;
aFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&) position);
// 'clip' only applies to absolutely positioned elements, and is
// relative to the element's border edge. 'clip' applies to the entire
// element: border, padding, and content areas, and even scrollbars if
// there are any.
if (position->IsAbsolutelyPositioned() && (display->mClipFlags & NS_STYLE_CLIP_RECT)) {
nsSize size;
// Start with the 'auto' values and then factor in user specified values
aFrame->GetSize(size);
nsRect clipRect(0, 0, size.width, size.height);
if (display->mClipFlags & NS_STYLE_CLIP_RECT) {
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
clipRect.y = display->mClip.y;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
clipRect.x = display->mClip.x;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
clipRect.width = display->mClip.width;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
clipRect.height = display->mClip.height;
}
}
// Set updated clip-rect into the rendering context
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
return PR_TRUE;
}
return PR_FALSE;
}
NS_IMETHODIMP
PresShell::Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
void* clientData;
nsIFrame* frame;
nsresult rv = NS_OK;
NS_ASSERTION(!(nsnull == aView), "null view");
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
if (nsnull != frame)
{
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
// If the frame is absolutely positioned, then the 'clip' property
// applies
PRBool setClipRect = SetClipRect(aRenderingContext, frame);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_BACKGROUND);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FLOATERS);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FOREGROUND);
if (setClipRect) {
PRBool clipState;
aRenderingContext.PopState(clipState);
}
#ifdef NS_DEBUG
// Draw a border around the frame
if (nsIFrameDebug::GetShowFrameBorders()) {
nsRect r;
frame->GetRect(r);
aRenderingContext.SetColor(NS_RGB(0,0,255));
aRenderingContext.DrawRect(0, 0, r.width, r.height);
}
// Draw a border around the current event target
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) && (aView == mCurrentTargetView)) {
aRenderingContext.SetColor(NS_RGB(128,0,128));
aRenderingContext.DrawRect(mCurrentTargetRect.x, mCurrentTargetRect.y, mCurrentTargetRect.width, mCurrentTargetRect.height);
}
#endif
}
return rv;
}
nsIFrame*
PresShell::GetCurrentEventFrame()
{
if (!mCurrentEventFrame && mCurrentEventContent) {
// Make sure the content still has a document reference. If not,
// then we assume it is no longer in the content tree and the
// frame shouldn't get an event, nor should we even assume its
// safe to try and find the frame.
nsCOMPtr<nsIDocument> doc;
nsresult result = mCurrentEventContent->GetDocument(*getter_AddRefs(doc));
if (NS_SUCCEEDED(result) && doc) {
GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame);
}
}
return mCurrentEventFrame;
}
NS_IMETHODIMP
PresShell::GetEventTargetFrame(nsIFrame** aFrame)
{
*aFrame = GetCurrentEventFrame();
return NS_OK;
}
void
PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent)
{
if (mCurrentEventFrame || mCurrentEventContent) {
mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0);
mCurrentEventContentStack.InsertElementAt((void*)mCurrentEventContent, 0);
}
mCurrentEventFrame = aFrame;
mCurrentEventContent = aContent;
NS_IF_ADDREF(aContent);
}
void
PresShell::PopCurrentEventInfo()
{
mCurrentEventFrame = nsnull;
NS_IF_RELEASE(mCurrentEventContent);
if (0 != mCurrentEventFrameStack.Count()) {
mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
mCurrentEventContent = (nsIContent*)mCurrentEventContentStack.ElementAt(0);
mCurrentEventContentStack.RemoveElementAt(0);
}
}
NS_IMETHODIMP
PresShell::HandleEvent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled)
{
void* clientData;
nsIFrame* frame;
nsresult rv = NS_OK;
NS_ASSERTION(!(nsnull == aView), "null view");
aHandled = PR_TRUE;
if (mIsDestroying || mIsReflowing) {
return NS_OK;
}
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
/* if (mSelection && aEvent->eventStructType == NS_KEY_EVENT)
{//KEY HANDLERS WILL GET RID OF THIS
if (mDisplayNonTextSelection && NS_SUCCEEDED(mSelection->HandleKeyEvent(mPresContext, aEvent)))
{
return NS_OK;
}
}
*/
if (nsnull != frame) {
PushCurrentEventInfo(nsnull, nsnull);
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
//change 6-01-00 mjudge,ftang adding ime as an event that needs focused element
if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent)) {
//Key events go to the focused frame, not point based.
manager->GetFocusedContent(&mCurrentEventContent);
if (mCurrentEventContent)
GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame);
else {
// XXX This is the way key events seem to work? Why?????
// They spend time doing calls to GetFrameForPoint with the
// point as (0,0) (or sometimes something else).
// XXX If this code is really going to stay, it should
// probably go into a separate function, because its just
// a duplicate of the code a few lines below:
// This is because we want to give the point in the same
// coordinates as the frame's own Rect, so mRect.Contains(aPoint)
// works. However, this point is relative to the frame's rect, so
// we need to add on the origin of the rect.
/* nsPoint eventPoint;
frame->GetOrigin(eventPoint);
eventPoint += aEvent->point;
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FOREGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FLOATERS, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_BACKGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
#ifdef XP_MAC*/
// On the Mac it is possible to be running with no windows open, only the native menu bar.
// In this situation, we need to handle key board events but there are no frames, so
// we set mCurrentEventContent and that works itself out in HandleEventInternal.
mCurrentEventContent = mDocument->GetRootContent();
mCurrentEventFrame = nsnull;
/*#else
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
#endif
rv = NS_OK;
}
}
}
*/
}
}
else {
// This is because we want to give the point in the same
// coordinates as the frame's own Rect, so mRect.Contains(aPoint)
// works. However, this point is relative to the frame's rect, so
// we need to add on the origin of the rect.
nsPoint eventPoint;
frame->GetOrigin(eventPoint);
eventPoint += aEvent->point;
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FOREGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FLOATERS, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_BACKGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
rv = NS_OK;
}
}
}
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aView, NS_EVENT_FLAG_INIT, aEventStatus);
}
NS_RELEASE(manager);
}
#ifdef NS_DEBUG
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) && (GetCurrentEventFrame())) {
nsIView *oldView = mCurrentTargetView;
nsPoint offset(0,0);
nsRect oldTargetRect(mCurrentTargetRect);
mCurrentEventFrame->GetRect(mCurrentTargetRect);
mCurrentEventFrame->GetView(mPresContext, &mCurrentTargetView);
if ( ! mCurrentTargetView ) {
mCurrentEventFrame->GetOffsetFromView(mPresContext, offset, &mCurrentTargetView);
}
if (mCurrentTargetView) {
mCurrentTargetRect.x = offset.x;
mCurrentTargetRect.y = offset.y;
// use aView or mCurrentTargetView??
if ( (mCurrentTargetRect != oldTargetRect) || (mCurrentTargetView != oldView)) {
nsIViewManager *vm;
if ((NS_OK == GetViewManager(&vm)) && vm) {
vm->UpdateView(mCurrentTargetView,mCurrentTargetRect,0);
if (oldView)
vm->UpdateView(oldView,oldTargetRect,0);
NS_IF_RELEASE(vm);
}
}
}
}
#endif
PopCurrentEventInfo();
}
else {
aHandled = PR_FALSE;
rv = NS_OK;
}
return rv;
}
NS_IMETHODIMP
PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(aFrame, aContent);
ret = HandleEventInternal(aEvent, nsnull, aFlags, aStatus);
PopCurrentEventInfo();
return NS_OK;
}
nsresult
PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView, PRUint32 aFlags, nsEventStatus* aStatus)
{
nsresult rv = NS_OK;
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager) && GetCurrentEventFrame()) {
//1. Give event to event manager for pre event state changes and generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus, aView);
//2. Give event to the DOM for third party and JS use.
if ((GetCurrentEventFrame()) && NS_OK == rv) {
if (mCurrentEventContent) {
rv = mCurrentEventContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
}
else {
nsIContent* targetContent;
if (NS_OK == mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent, &targetContent) && nsnull != targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
NS_RELEASE(targetContent);
}
}
//3. Give event to the Frames for browser default processing.
// XXX The event isn't translated into the local coordinate space
// of the frame...
if (GetCurrentEventFrame() && NS_OK == rv && aEvent->eventStructType != NS_EVENT) {
rv = mCurrentEventFrame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent, aStatus);
}
//4. Give event to event manager for post event state changes and generation of synthetic events.
if ((GetCurrentEventFrame()) && NS_OK == rv) {
rv = manager->PostHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus, aView);
}
}
NS_RELEASE(manager);
}
return rv;
}
// Dispatch event to content only (NOT full processing)
// See also HandleEventWithTarget which does full event processing.
NS_IMETHODIMP
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(nsnull, aTargetContent);
// Bug 41013: Check if the event should be dispatched to content.
// It's possible that we are in the middle of destroying the window
// and the js context is out of date. This check detects the case
// that caused a crash in bug 41013, but there may be a better way
// to handle this situation!
nsCOMPtr<nsISupports> container;
ret = mPresContext->GetContainer(getter_AddRefs(container));
if (NS_SUCCEEDED(ret) && container) {
// Dispatch event to content
ret = aTargetContent->HandleDOMEvent(mPresContext, aEvent, nsnull, NS_EVENT_FLAG_INIT, aStatus);
}
PopCurrentEventInfo();
return NS_OK;
}
NS_IMETHODIMP
PresShell::Scrolled(nsIView *aView)
{
void* clientData;
nsIFrame* frame;
nsresult rv;
NS_ASSERTION(!(nsnull == aView), "null view");
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
if (nsnull != frame)
rv = frame->Scrolled(aView);
else
rv = NS_OK;
return rv;
}
NS_IMETHODIMP
PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight)
{
return ResizeReflow(aWidth, aHeight);
}
//--------------------------------------------------------
// Start of protected and private methods on the PresShell
//--------------------------------------------------------
//-------------- Begin Reflow Event Definition ------------------------
struct ReflowEvent : public PLEvent {
ReflowEvent(nsIPresShell* aPresShell);
~ReflowEvent() { }
void HandleEvent() {
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", presShell, this);
}
#endif
// XXX Statically cast the pres shell pointer so that we can call
// protected methods on the pres shell. (the ReflowEvent struct
// is a friend of the PresShell class)
PresShell* ps = NS_REINTERPRET_CAST(PresShell*, presShell.get());
PRBool isBatching;
ps->SetReflowEventStatus(PR_FALSE);
ps->GetReflowBatchingStatus(&isBatching);
if (!isBatching) ps->ProcessReflowCommands(PR_TRUE);
}
else
mPresShell = 0;
}
nsWeakPtr mPresShell;
};
static void PR_CALLBACK HandlePLEvent(ReflowEvent* aEvent)
{
aEvent->HandleEvent();
}
static void PR_CALLBACK DestroyPLEvent(ReflowEvent* aEvent)
{
delete aEvent;
}
ReflowEvent::ReflowEvent(nsIPresShell* aPresShell)
{
NS_ASSERTION(aPresShell, "Null parameters!");
mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell));
PL_InitEvent(this, aPresShell,
(PLHandleEventProc) ::HandlePLEvent,
(PLDestroyEventProc) ::DestroyPLEvent);
}
//-------------- End Reflow Event Definition ---------------------------
void
PresShell::PostReflowEvent()
{
if (!mPendingReflowEvent && !mIsReflowing && mReflowCommands.Count() > 0) {
ReflowEvent* ev = new ReflowEvent(NS_STATIC_CAST(nsIPresShell*, this));
mEventQueue->PostEvent(ev);
mPendingReflowEvent = PR_TRUE;
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", this, ev);
}
#endif
}
}
nsresult
PresShell::WillCauseReflow()
{
mViewManager->CacheWidgetChanges(PR_TRUE);
return NS_OK;
}
nsresult
PresShell::DidCauseReflow()
{
mViewManager->CacheWidgetChanges(PR_FALSE);
if (!gAsyncReflowDuringDocLoad && mDocumentLoading) {
FlushPendingNotifications();
}
return NS_OK;
}
nsresult
PresShell::ProcessReflowCommands(PRBool aInterruptible)
{
MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_START(mReflowWatch);
PRTime beforeReflow, afterReflow;
PRInt64 diff;
if (0 != mReflowCommands.Count()) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsIRenderingContext* rcx;
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
#ifdef DEBUG
if (GetVerifyReflowEnable()) {
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: begin incremental reflow\n");
}
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
PRInt32 i, n = mReflowCommands.Count();
printf("\nPresShell::ProcessReflowCommands: this=%p, count=%d\n", this, n);
for (i = 0; i < n; i++) {
nsIReflowCommand* rc = (nsIReflowCommand*)
mReflowCommands.ElementAt(i);
rc->List(stdout);
}
}
#endif
mIsReflowing = PR_TRUE;
while (0 != mReflowCommands.Count()) {
// Use RemoveElementAt in case the reflowcommand dispatches a
// new one during its execution.
nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(0);
mReflowCommands.RemoveElementAt(0);
ReflowCommandRemoved(rc);
// Dispatch the reflow command
nsSize maxSize;
rootFrame->GetSize(maxSize);
if (aInterruptible) beforeReflow = PR_Now();
rc->Dispatch(mPresContext, desiredSize, maxSize, *rcx); // dispatch the reflow command
if (aInterruptible) afterReflow = PR_Now();
NS_RELEASE(rc);
VERIFY_STYLE_TREE;
if (aInterruptible) {
PRInt64 totalTime;
PRInt64 maxTime;
LL_SUB(diff, afterReflow, beforeReflow);
LL_I2L(totalTime, mAccumulatedReflowTime);
LL_ADD(totalTime, totalTime, diff);
LL_L2I(mAccumulatedReflowTime, totalTime);
LL_I2L(maxTime, gMaxRCProcessingTime);
if (LL_CMP(totalTime, >, maxTime))
break;
}
}
NS_IF_RELEASE(rcx);
mIsReflowing = PR_FALSE;
if (aInterruptible) {
if (mReflowCommands.Count() > 0) {
// Reflow Commands are still queued up.
// Schedule a reflow event to handle them asynchronously.
PostReflowEvent();
}
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("Time spent in PresShell::ProcessReflowCommands(), this=%p, time=%d micro seconds\n",
this, mAccumulatedReflowTime);
}
#endif
mAccumulatedReflowTime = 0;
}
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n", this);
}
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE);
mInVerifyReflow = PR_TRUE;
PRBool ok = VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: finished (%s)\n",
ok ? "ok" : "failed");
}
if (0 != mReflowCommands.Count()) {
printf("XXX yikes! reflow commands queued during verify-reflow\n");
}
}
#endif
}
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
HandlePostedDOMEvents();
HandlePostedAttributeChanges();
HandlePostedReflowCallbacks();
return NS_OK;
}
nsresult
PresShell::GetReflowEventStatus(PRBool* aPending)
{
if (aPending)
*aPending = mPendingReflowEvent;
return NS_OK;
}
nsresult
PresShell::SetReflowEventStatus(PRBool aPending)
{
mPendingReflowEvent = aPending;
return NS_OK;
}
nsresult
PresShell::CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult)
{
nsIStyleSet* clone;
nsresult rv = NS_NewStyleSet(&clone);
if (NS_FAILED(rv)) {
return rv;
}
PRInt32 i, n;
n = aSet->GetNumberOfOverrideStyleSheets();
for (i = 0; i < n; i++) {
nsIStyleSheet* ss;
ss = aSet->GetOverrideStyleSheetAt(i);
if (nsnull != ss) {
clone->AppendOverrideStyleSheet(ss);
NS_RELEASE(ss);
}
}
n = aSet->GetNumberOfDocStyleSheets();
for (i = 0; i < n; i++) {
nsIStyleSheet* ss;
ss = aSet->GetDocStyleSheetAt(i);
if (nsnull != ss) {
clone->AddDocStyleSheet(ss, mDocument);
NS_RELEASE(ss);
}
}
n = aSet->GetNumberOfBackstopStyleSheets();
for (i = 0; i < n; i++) {
nsIStyleSheet* ss;
ss = aSet->GetBackstopStyleSheetAt(i);
if (nsnull != ss) {
clone->AppendBackstopStyleSheet(ss);
NS_RELEASE(ss);
}
}
*aResult = clone;
return NS_OK;
}
nsresult
PresShell::ReflowCommandAdded(nsIReflowCommand* aRC)
{
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
if (mDocumentLoading) {
PRInt32 flags;
aRC->GetFlags(&flags);
flags |= NS_RC_CREATED_DURING_DOCUMENT_LOAD;
aRC->SetFlags(flags);
mRCCreatedDuringLoad++;
if (!mDummyLayoutRequest) {
AddDummyLayoutRequest();
}
#ifdef DEBUG_nisheeth
printf("presshell=%p, mRCCreatedDuringLoad=%d\n", this, mRCCreatedDuringLoad);
#endif
}
}
return NS_OK;
}
nsresult
PresShell::ReflowCommandRemoved(nsIReflowCommand* aRC)
{
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
PRInt32 flags;
aRC->GetFlags(&flags);
if (flags & NS_RC_CREATED_DURING_DOCUMENT_LOAD) {
mRCCreatedDuringLoad--;
#ifdef DEBUG_nisheeth
printf("presshell=%p, mRCCreatedDuringLoad=%d\n", this, mRCCreatedDuringLoad);
#endif
}
if (mRCCreatedDuringLoad == 0 && !mDocumentLoading && mDummyLayoutRequest)
RemoveDummyLayoutRequest();
}
return NS_OK;
}
nsresult
PresShell::AddDummyLayoutRequest(void)
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad) {
rv = DummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), this);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument) {
rv = mDocument->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv)) return rv;
}
if (loadGroup) {
rv = mDummyLayoutRequest->SetLoadGroup(loadGroup);
if (NS_FAILED(rv)) return rv;
rv = loadGroup->AddChannel(mDummyLayoutRequest, nsnull);
if (NS_FAILED(rv)) return rv;
}
#ifdef DEBUG_nisheeth
printf("presshell=%p, Added dummy layout request.\n", this);
#endif
}
return rv;
}
nsresult
PresShell::RemoveDummyLayoutRequest(void)
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad) {
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument) {
rv = mDocument->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv)) return rv;
}
if (loadGroup && mDummyLayoutRequest) {
rv = loadGroup->RemoveChannel(mDummyLayoutRequest, nsnull, NS_OK, nsnull);
if (NS_FAILED(rv)) return rv;
mDummyLayoutRequest = nsnull;
}
#ifdef DEBUG_nisheeth
printf("presshell=%p, Removed dummy layout request.\n", this);
#endif
}
return rv;
}
//------------------------------------------------------
// End of protected and private methods on the PresShell
//------------------------------------------------------
// Start of DEBUG only code
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIScrollableView.h"
#include "nsIDeviceContext.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_CID(kScrollingViewCID, NS_SCROLLING_VIEW_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.AssignWithConversion("(null)");
}
fputs(name, stdout);
printf(" != ");
if (nsnull != k2) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.AssignWithConversion("(null)");
}
fputs(name, stdout);
printf(" %s", aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsRect& r1, const nsRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(name, stdout);
fprintf(stdout, " %p ", k1);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != \n");
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(name, stdout);
fprintf(stdout, " %p ", k2);
}
printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static PRBool
CompareTrees(nsIPresContext* aFirstPresContext, nsIFrame* aFirstFrame,
nsIPresContext* aSecondPresContext, nsIFrame* aSecondFrame)
{
if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame)
return PR_TRUE;
PRBool ok = PR_TRUE;
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* k1, *k2;
aFirstFrame->FirstChild(aFirstPresContext, listName, &k1);
aSecondFrame->FirstChild(aSecondPresContext, listName, &k2);
PRInt32 l1 = nsContainerFrame::LengthOf(k1);
PRInt32 l2 = nsContainerFrame::LengthOf(k2);
if (l1 != l2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
nsRect r1, r2;
nsIView* v1, *v2;
nsIWidget* w1, *w2;
for (;;) {
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child lists are different\n");
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
k1->GetRect(r1);
k2->GetRect(r2);
if (r1 != r2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "(frame rects)", r1, r2);
}
// Make sure either both have views or neither have views; if they
// do have views, make sure the views are the same size. If the
// views have widgets, make sure they both do or neither does. If
// they do, make sure the widgets are the same size.
k1->GetView(aFirstPresContext, &v1);
k2->GetView(aSecondPresContext, &v2);
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child views are not matched\n");
}
else if (nsnull != v1) {
v1->GetBounds(r1);
v2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(view rects)", r1, r2);
}
v1->GetWidget(w1);
v2->GetWidget(w2);
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
}
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
// verify that neither frame has a space manager,
// or they both do and the space managers are equivalent
nsCOMPtr<nsIFrameManager>fm1;
nsCOMPtr<nsIPresShell> ps1;
nsISpaceManager *sm1; // note, no ref counting here
aFirstPresContext->GetShell(getter_AddRefs(ps1));
NS_ASSERTION(ps1, "no pres shell for primary tree!");
ps1->GetFrameManager(getter_AddRefs(fm1));
NS_ASSERTION(fm1, "no frame manager for primary tree!");
fm1->GetFrameProperty((nsIFrame*)k1, nsLayoutAtoms::spaceManagerProperty,
0, (void **)&sm1);
// look at the test frame
nsCOMPtr<nsIFrameManager>fm2;
nsCOMPtr<nsIPresShell> ps2;
nsISpaceManager *sm2; // note, no ref counting here
aSecondPresContext->GetShell(getter_AddRefs(ps2));
NS_ASSERTION(ps2, "no pres shell for test tree!");
ps2->GetFrameManager(getter_AddRefs(fm2));
NS_ASSERTION(fm2, "no frame manager for test tree!");
fm2->GetFrameProperty((nsIFrame*)k2, nsLayoutAtoms::spaceManagerProperty,
0, (void **)&sm2);
// now compare the space managers
if (((nsnull == sm1) && (nsnull != sm2)) ||
((nsnull != sm1) && (nsnull == sm2))) { // one is null, and the other is not
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "space managers are not matched\n");
}
else if (sm1 && sm2) { // both are not null, compare them
// first, compare yMost
nscoord yMost1, yMost2;
nsresult smresult = sm1->YMost(yMost1);
if (NS_ERROR_ABORT != smresult)
{
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
smresult = sm2->YMost(yMost2);
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
if (yMost1 != yMost2) {
LogVerifyMessage(k1, k2, "yMost of space managers differs\n");
}
// now compare bands by sampling
PRInt32 yIncrement = yMost1/100;
if (0==yIncrement) {
yIncrement = 1; // guarantee we make progress in the loop below
}
nscoord yOffset = 0;
for ( ; ok && yOffset < yMost1; yOffset += yIncrement)
{
nscoord small=5, large=100;
nsBandData band1, band2;
nsBandTrapezoid trap1[20], trap2[20];
band1.mSize = band2.mSize = 20;
band1.mTrapezoids = trap1;
band2.mTrapezoids = trap2;
sm1->GetBandData(yOffset, nsSize(small,small), band1);
sm2->GetBandData(yOffset, nsSize(small,small), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ;trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
// test the larger maxSize
sm1->GetBandData(yOffset, nsSize(large,large), band1);
sm2->GetBandData(yOffset, nsSize(large,large), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ; trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
}
}
}
// Compare the sub-trees too
if (!CompareTrees(aFirstPresContext, k1, aSecondPresContext, k2)) {
ok = PR_FALSE;
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
// Advance to next sibling
k1->GetNextSibling(&k1);
k2->GetNextSibling(&k2);
}
else {
break;
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
NS_IF_RELEASE(listName);
nsIAtom* listName1;
nsIAtom* listName2;
aFirstFrame->GetAdditionalChildListName(listIndex, &listName1);
aSecondFrame->GetAdditionalChildListName(listIndex, &listName2);
listIndex++;
if (listName1 != listName2) {
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
ok = PR_FALSE;
}
LogVerifyMessage(k1, k2, "child list names are not matched: ");
nsAutoString tmp;
if (nsnull != listName1) {
listName1->ToString(tmp);
fputs(tmp, stdout);
}
else
fputs("(null)", stdout);
printf(" != ");
if (nsnull != listName2) {
listName2->ToString(tmp);
fputs(tmp, stdout);
}
else
fputs("(null)", stdout);
printf("\n");
NS_IF_RELEASE(listName1);
NS_IF_RELEASE(listName2);
break;
}
NS_IF_RELEASE(listName2);
listName = listName1;
} while (ok && (listName != nsnull));
return ok;
}
#endif
#if 0
static nsIFrame*
FindTopFrame(nsIFrame* aRoot)
{
if (nsnull != aRoot) {
nsIContent* content;
aRoot->GetContent(&content);
if (nsnull != content) {
nsIAtom* tag;
content->GetTag(tag);
if (nsnull != tag) {
NS_RELEASE(tag);
NS_RELEASE(content);
return aRoot;
}
NS_RELEASE(content);
}
// Try one of the children
nsIFrame* kid;
aRoot->FirstChild(nsnull, &kid);
while (nsnull != kid) {
nsIFrame* result = FindTopFrame(kid);
if (nsnull != result) {
return result;
}
kid->GetNextSibling(&kid);
}
}
return nsnull;
}
#endif
#ifdef DEBUG
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
PRBool
PresShell::VerifyIncrementalReflow()
{
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Building Verification Tree...\n");
}
// All the stuff we are creating that needs releasing
nsIPresContext* cx;
nsIViewManager* vm;
nsIPresShell* sh;
// Create a presentation context to view the new frame tree
nsresult rv;
PRBool isPaginated = PR_FALSE;
mPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
rv = NS_NewPrintPreviewContext(&cx);
}
else {
rv = NS_NewGalleyContext(&cx);
}
nsISupports* container;
if (NS_SUCCEEDED(mPresContext->GetContainer(&container)) &&
(nsnull != container)) {
cx->SetContainer(container);
nsILinkHandler* lh;
if (NS_SUCCEEDED(container->QueryInterface(NS_GET_IID(nsILinkHandler),
(void**)&lh))) {
cx->SetLinkHandler(lh);
NS_RELEASE(lh);
}
NS_RELEASE(container);
}
NS_ASSERTION(NS_OK == rv, "failed to create presentation context");
nsCOMPtr<nsIDeviceContext> dc;
mPresContext->GetDeviceContext(getter_AddRefs(dc));
cx->Init(dc);
// Get our scrolling preference
nsScrollPreference scrolling;
nsIView* rootView;
mViewManager->GetRootView(rootView);
nsIScrollableView* scrollView;
rv = rootView->QueryInterface(NS_GET_IID(nsIScrollableView),
(void**)&scrollView);
if (NS_OK == rv) {
scrollView->GetScrollPreference(scrolling);
}
nsIWidget* rootWidget;
rootView->GetWidget(rootWidget);
void* nativeParentWidget = rootWidget->GetNativeData(NS_NATIVE_WIDGET);
// Create a new view manager.
rv = nsComponentManager::CreateInstance(kViewManagerCID, nsnull,
NS_GET_IID(nsIViewManager),
(void**) &vm);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to create view manager");
}
rv = vm->Init(dc);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to init view manager");
}
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds;
mPresContext->GetVisibleArea(tbounds);
nsIView* view;
rv = nsComponentManager::CreateInstance(kViewCID, nsnull,
NS_GET_IID(nsIView),
(void **) &view);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to create scroll view");
}
rv = view->Init(vm, tbounds, nsnull);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to init scroll view");
}
//now create the widget for the view
rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget);
if (NS_OK != rv) {
NS_ASSERTION(NS_OK == rv, "failed to create scroll view widget");
}
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
// Make the new presentation context the same size as our
// presentation context.
nsRect r;
mPresContext->GetVisibleArea(r);
cx->SetVisibleArea(r);
// Create a new presentation shell to view the document. Use the
// exact same style information that this document has.
nsCOMPtr<nsIStyleSet> newSet;
rv = CloneStyleSet(mStyleSet, getter_AddRefs(newSet));
NS_ASSERTION(NS_SUCCEEDED(rv), "failed to clone style set");
rv = mDocument->CreateShell(cx, vm, newSet, &sh);
sh->SetVerifyReflowEnable(PR_FALSE); // turn off verify reflow while we're reflowing the test frame tree
NS_ASSERTION(NS_OK == rv, "failed to create presentation shell");
vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh));
sh->InitialReflow(r.width, r.height);
sh->SetVerifyReflowEnable(PR_TRUE); // turn on verify reflow again now that we're done reflowing the test frame tree
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Verification Tree built, comparing...\n");
}
// Now that the document has been reflowed, use its frame tree to
// compare against our frame tree.
nsIFrame* root1;
GetRootFrame(&root1);
nsIFrame* root2;
sh->GetRootFrame(&root2);
PRBool ok = CompareTrees(mPresContext, root1, cx, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(root1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
printf("Verification tree:\n");
if (NS_SUCCEEDED(root2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
}
cx->Stop();
cx->SetContainer(nsnull);
NS_RELEASE(cx);
sh->EndObservingDocument();
NS_RELEASE(sh);
NS_RELEASE(vm);
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Finished Verifying Reflow...\n");
}
return ok;
}
#endif
// PresShellViewEventListener
NS_IMPL_ISUPPORTS2(PresShellViewEventListener, nsIScrollPositionListener, nsICompositeListener)
PresShellViewEventListener::PresShellViewEventListener()
{
NS_INIT_ISUPPORTS();
mPresShell = 0;
mWasVisible = PR_FALSE;
mCallCount = 0;
}
PresShellViewEventListener::~PresShellViewEventListener()
{
mPresShell = 0;
}
nsresult
PresShellViewEventListener::SetPresShell(nsIPresShell *aPresShell)
{
mPresShell = aPresShell;
return NS_OK;
}
nsresult
PresShellViewEventListener::HideCaret()
{
nsresult result = NS_OK;
if (mPresShell && 0 == mCallCount)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
{
result = selCon->GetCaretEnabled(&mWasVisible);
if (NS_SUCCEEDED(result) && mWasVisible)
result = selCon->SetCaretEnabled(PR_FALSE);
}
}
++mCallCount;
return result;
}
nsresult
PresShellViewEventListener::RestoreCaretVisibility()
{
nsresult result = NS_OK;
--mCallCount;
if (mPresShell && 0 == mCallCount && mWasVisible)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
result = selCon->SetCaretEnabled(PR_TRUE);
}
return result;
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return RestoreCaretVisibility();
}
NS_IMETHODIMP
PresShellViewEventListener::WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
return RestoreCaretVisibility();
}
NS_IMETHODIMP
PresShellViewEventListener::WillRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::DidRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags)
{
return RestoreCaretVisibility();
}
// Enable, Disable and Print, Start, Stop and/or Reset the StyleSet watch
/*static*/
nsresult CtlStyleWatch(PRUint32 aCtlValue, nsIStyleSet *aStyleSet)
{
NS_ASSERTION(aStyleSet!=nsnull,"aStyleSet cannot be null in CtlStyleWatch");
nsresult rv = NS_OK;
#ifdef MOZ_PERF_METRICS
if (aStyleSet != nsnull){
nsCOMPtr<nsITimeRecorder> watch = do_QueryInterface(aStyleSet, &rv);
if (NS_SUCCEEDED(rv) && watch) {
if (aCtlValue & kStyleWatchEnable){
watch->EnableTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchDisable){
watch->DisableTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchPrint){
watch->PrintTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchStart){
watch->StartTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchStop){
watch->StopTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchReset){
watch->ResetTimer(NS_TIMER_STYLE_RESOLUTION);
}
}
}
#endif
return rv;
}
//-------------------------------------------------------------
//-- Reflow counts
//-------------------------------------------------------------
#ifdef MOZ_REFLOW_PERF
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::ClearTotals()
{
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::DumpReflows()
{
if (mReflowCountMgr) {
char * uriStr = nsnull;
if (mDocument) {
nsIURI * uri = mDocument->GetDocumentURL();
if (uri) {
uri->GetPath(&uriStr);
NS_RELEASE(uri);
}
}
mReflowCountMgr->DisplayTotals(uriStr);
mReflowCountMgr->DisplayHTMLTotals(uriStr);
mReflowCountMgr->DisplayDiffsInTotals("Differences");
if (uriStr) delete [] uriStr;
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::CountReflows(const char * aName, PRUint32 aType)
{
if (mReflowCountMgr) {
//mReflowCountMgr->Add(aName, (nsReflowReason)aType);
}
return NS_OK;
}
//------------------------------------------------------------------
//-- Reflow Counter Classes Impls
//------------------------------------------------------------------
//ReflowCountMgr ReflowCountMgr::gReflowCountMgr;
//------------------------------------------------------------------
ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) :
mMgr(aMgr)
{
ClearTotals();
SetTotalsCache();
}
//------------------------------------------------------------------
ReflowCounter::~ReflowCounter()
{
//DisplayTotals(mTotals, "Grand Totals");
}
//------------------------------------------------------------------
void ReflowCounter::ClearTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mTotals[i] = 0;
}
}
//------------------------------------------------------------------
void ReflowCounter::SetTotalsCache()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::CalcDiffInTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i] - mCacheTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(const char * aStr)
{
DisplayTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayDiffTotals(const char * aStr)
{
DisplayTotals(mCacheTotals, aStr?aStr:"Diff Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(const char * aStr)
{
DisplayHTMLTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
printf("%25s\t", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
printf("%d\t", aArray[i]);
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
printf("%d\n", total);
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
FILE * fd = mMgr->GetOutFile();
if (!fd) {
return;
}
fprintf(fd, "<tr><td><center>%s</center></td>", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
fprintf(fd, "<td><center>");
if (aArray[i]) {
fprintf(fd, "%d", aArray[i]);
} else {
fprintf(fd, "&nbsp;");
}
fprintf(fd, "</center></td>");
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
fprintf(fd, "<td><center>%d</center></td></tr>\n", total);
}
//------------------------------------------------------------------
ReflowCountMgr::ReflowCountMgr()
{
mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mCycledOnce = PR_FALSE;
}
//------------------------------------------------------------------
ReflowCountMgr::~ReflowCountMgr()
{
//if (GetInstance() == this) {
// DoGrandTotals();
//}
CleanUp();
}
//------------------------------------------------------------------
ReflowCounter * ReflowCountMgr::LookUp(const char * aName)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
return counter;
}
return nsnull;
}
//------------------------------------------------------------------
void ReflowCountMgr::Add(const char * aName, nsReflowReason aType)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
if (counter == nsnull) {
counter = new ReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
char * name = nsCRT::strdup(aName);
NS_ASSERTION(name != nsnull, "null ptr");
PL_HashTableAdd(mCounts, name, counter);
}
counter->Add(aType);
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
delete counter;
delete [] str;
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
void ReflowCountMgr::CleanUp()
{
if (nsnull != mCounts) {
PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull);
PL_HashTableDestroy(mCounts);
mCounts = nsnull;
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
printf("\t\t\t");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+1;i++) {
printf("\t%s", title[i]);
}
printf("\n");
for (i=0;i<78;i++) {
printf("-");
}
printf("\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this);
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayHTMLTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandHTMLTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Class", "Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
fprintf(mFD, "<tr>");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+2;i++) {
fprintf(mFD, "<td><center><b>%s<b></center></td>", title[i]);
}
fprintf(mFD, "</tr>\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this);
}
}
//------------------------------------
void ReflowCountMgr::DisplayTotals(const char * aStr)
{
printf("%s\n", aStr?aStr:"No name");
DoGrandTotals();
}
//------------------------------------
void ReflowCountMgr::DisplayHTMLTotals(const char * aStr)
{
#ifdef WIN32x // XXX NOT XP!
char name[1024];
char * sptr = strrchr(aStr, '/');
if (sptr) {
sptr++;
strcpy(name, sptr);
char * eptr = strrchr(name, '.');
if (eptr) {
*eptr = 0;
}
strcat(name, "_stats.html");
}
mFD = fopen(name, "w");
if (mFD) {
fprintf(mFD, "<html><head><title>Reflow Stats</title></head><body>\n");
const char * title = aStr?aStr:"No name";
fprintf(mFD, "<center><b>%s</b><br><table border=1 style=\"background-color:#e0e0e0\">", title);
DoGrandHTMLTotals();
fprintf(mFD, "</center></table>\n");
fprintf(mFD, "</body></html>\n");
fclose(mFD);
mFD = nsnull;
}
#endif // not XP!
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg)
{
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->ClearTotals();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearTotals()
{
PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this);
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
gTots->SetTotalsCache();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg)
{
PRBool cycledOnce = (PRBool)arg;
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
if (cycledOnce) {
counter->CalcDiffInTotals();
counter->DisplayDiffTotals(str);
}
counter->SetTotalsCache();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr)
{
if (mCycledOnce) {
printf("Differences\n");
for (PRInt32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
ClearGrandTotals();
}
PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce);
mCycledOnce = PR_TRUE;
}
#endif // MOZ_REFLOW_PERF