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gecko-dev/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):
*/
#define PL_ARENA_CONST_ALIGN_MASK 3
#include "nsIPresShell.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 "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 "nsIDOMSelection.h"
#include "nsISelectionController.h"
#include "nsLayoutCID.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsWeakReference.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 "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"
#ifdef MOZ_PERF_METRICS
#include "nsITimeRecorder.h"
#endif
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsIFormatConverter.h"
#include "nsIDocShellTreeItem.h"
#include "nsIBrowserWindow.h"
#include "nsIURI.h"
#include "nsIEventQueue.h"
#include "nsIEventQueueService.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
// Drag & Drop, Clipboard Support
static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID);
static NS_DEFINE_IID(kCXIFConverterCID, NS_XIFFORMATCONVERTER_CID);
#undef NOISY
// comment out to hide caret
#define SHOW_CARET
//----------------------------------------------------------------------
// Class IID's
static NS_DEFINE_IID(kFrameSelectionCID, NS_FRAMESELECTION_CID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_CID(kPrefServiceCID, NS_PREF_CID);
// IID's
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIPresShellIID, NS_IPRESSHELL_IID);
static NS_DEFINE_IID(kIDocumentObserverIID, NS_IDOCUMENT_OBSERVER_IID);
static NS_DEFINE_IID(kIViewObserverIID, NS_IVIEWOBSERVER_IID);
static NS_DEFINE_IID(kIFrameSelectionIID, NS_IFRAMESELECTION_IID);
static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID);
static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID);
static NS_DEFINE_IID(kIDOMRangeIID, NS_IDOMRANGE_IID);
static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID);
static NS_DEFINE_IID(kIFocusTrackerIID, NS_IFOCUSTRACKER_IID);
static NS_DEFINE_IID(kISelectionControllerIID, NS_ISELECTIONCONTROLLER_IID);
static NS_DEFINE_IID(kICaretIID, NS_ICARET_IID);
static NS_DEFINE_IID(kICaretID, NS_ICARET_IID);
static NS_DEFINE_IID(kIDOMHTMLDocumentIID, NS_IDOMHTMLDOCUMENT_IID);
static NS_DEFINE_IID(kIXMLDocumentIID, NS_IXMLDOCUMENT_IID);
static NS_DEFINE_IID(kIContentIID, NS_ICONTENT_IID);
static NS_DEFINE_IID(kIScrollableViewIID, NS_ISCROLLABLEVIEW_IID);
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_IID(kIScrollableFrameIID, NS_ISCROLLABLE_FRAME_IID);
// 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.
// It is used only when asynchronous reflow is enabled by setting gDoAsyncReflow to PR_TRUE.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
// Largest chunk size we recycle
static const int gMaxRecycledSize = 200;
// Flag for enabling/disabling asynchronous reflow
// Set via the "layout.reflow.async" pref
static PRBool gDoAsyncReflow = PR_FALSE;
// Memory is allocated 4-byte aligned. We have recyclers for chunks up to
// 200 bytes
class FrameArena {
public:
FrameArena(PRUint32 aArenaSize = 2048);
~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
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
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;
};
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);
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 GetSelection(SelectionType aType, nsIDOMSelection** aSelection);
NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion);
NS_IMETHOD RepaintSelection(SelectionType aType);
NS_IMETHOD GetFrameSelection(nsIFrameSelection** aSelection);
NS_IMETHOD EnterReflowLock();
NS_IMETHOD ExitReflowLock(PRBool aTryToReflow, PRBool aDoSynchronousReflow);
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 GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aPlaceholderFrame) const;
NS_IMETHOD AppendReflowCommand(nsIReflowCommand* aReflowCommand);
NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame);
NS_IMETHOD ProcessReflowCommands();
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();
// XXX This function needs to be renamed to something better.
// It is not simply a getter for the layout history state. It
// creates a new state object and captures frame state onto it
NS_IMETHOD GetHistoryState(nsILayoutHistoryState** aLayoutHistoryState);
NS_IMETHOD SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState);
NS_IMETHOD GetReflowEventStatus(PRBool* aPending);
NS_IMETHOD SetReflowEventStatus(PRBool aPending);
//nsIViewObserver interface
NS_IMETHOD Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD HandleEvent(nsIView* aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
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 aaInEnable);
NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled);
NS_IMETHOD SetDisplayNonTextSelection(PRBool aaInEnable);
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();
// 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);
protected:
virtual ~PresShell();
nsresult ReconstructFrames(void);
PRBool mCaretEnabled;
nsresult CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult);
#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;
PRUint32 mReflowLockCount;
PRBool mIsDestroying;
nsIFrame* mCurrentEventFrame;
nsIContent* mCurrentEventContent;
nsVoidArray mCurrentEventFrameStack;
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;
PRInt32 mAccumulatedReflowTime; // Time spent in reflow command processing so far
MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow
MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation
#ifdef DEBUG_nisheeth
PRInt32 mReflows;
PRInt32 mDiscardedReflowCommands;
#endif
private:
//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 PushCurrentEventFrame();
void PopCurrentEventFrame();
// helper function for posting reflow events
void PostReflowEvent();
PRBool AlreadyInQueue(nsIReflowCommand* aReflowCommand);
};
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsIFrameManager* aFrameManager)
{
if (aFrameManager && nsIFrameDebug::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame;
aFrameManager->GetRootFrame(&rootFrame);
aFrameManager->DebugVerifyStyleTree(rootFrame);
}
}
#define VERIFY_STYLE_TREE VerifyStyleTree(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;
#define VERIFY_REFLOW_ON 0x01
#define VERIFY_REFLOW_NOISY 0x02
#define VERIFY_REFLOW_ALL 0x04
#define VERIFY_REFLOW_DUMP_COMMANDS 0x08
#define VERIFY_REFLOW_NOISY_RC 0x10
#define VERIFY_REFLOW_REALLY_NOISY_RC 0x20
#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 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(kIPresShellIID, (void **) aInstancePtrResult);
}
PresShell::PresShell()
{
mIsDestroying = PR_FALSE;
mCaretEnabled = PR_FALSE;
mDisplayNonTextSelection = PR_FALSE;
mCurrentEventContent = nsnull;
mCurrentEventFrame = nsnull;
EnableScrolling();
mPendingReflowEvent = PR_FALSE;
#ifdef DEBUG_nisheeth
mReflows = 0;
mDiscardedReflowCommands = 0;
#endif
}
NS_IMPL_ADDREF(PresShell)
NS_IMPL_RELEASE(PresShell)
nsresult
PresShell::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (aIID.Equals(kIPresShellIID)) {
nsIPresShell* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDocumentObserverIID)) {
nsIDocumentObserver* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIViewObserverIID)) {
nsIViewObserver* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIFocusTrackerIID)) {
nsIFocusTracker* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISelectionControllerIID)) {
nsISelectionController* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(nsCOMTypeInfo<nsISupportsWeakReference>::GetIID())) {
nsISupportsWeakReference* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
nsIPresShell* tmp = this;
nsISupports* tmp2 = tmp;
*aInstancePtr = (void*) tmp2;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
PresShell::~PresShell()
{
mRefCnt = 99;/* XXX hack! get around re-entrancy bugs */
mIsDestroying = PR_TRUE;
// Clobber weak leaks in case of re-entrancy during tear down
mHistoryState = nsnull;
NS_IF_RELEASE(mCurrentEventContent);
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);
}
mRefCnt = 0;
if (mViewEventListener) {
mViewEventListener->SetPresShell((nsIPresShell*)nsnull);
NS_RELEASE(mViewEventListener);
}
}
/**
* 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,
nsIFrameSelection::GetIID(),
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);
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){
mDocument->SetDisplaySelection(PR_TRUE);
}
}
}
}
// 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;
gDoAsyncReflow = PR_FALSE;
// Get the prefs service
NS_WITH_SERVICE(nsIPref, prefs, kPrefServiceCID, &result);
if (NS_SUCCEEDED(result)) {
PRInt32 timeSlice;
prefs->GetIntPref("layout.reflow.timeslice", &timeSlice);
// Enable after fixing the Mac build
// LL_I2L(gMaxRCProcessingTime, timeSlice);
prefs->GetBoolPref("layout.reflow.async", &gDoAsyncReflow);
}
}
return NS_OK;
}
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::EnterReflowLock()
{
++mReflowLockCount;
return NS_OK;
}
NS_IMETHODIMP
PresShell::ExitReflowLock(PRBool aTryToReflow, PRBool aDoSynchronousReflow)
{
PRUint32 newReflowLockCount = mReflowLockCount - 1;
if (newReflowLockCount == 0 && aTryToReflow) {
if (aDoSynchronousReflow)
ProcessReflowCommands();
else
PostReflowEvent();
}
mReflowLockCount = newReflowLockCount;
return NS_OK;
}
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("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("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("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::GetSelection(SelectionType aType, nsIDOMSelection **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<nsIDOMSelection> domselection;
nsresult result;
result = mSelection->GetSelection(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
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
StCaretHider caretHider(this); // stack-based class hides caret until dtor.
EnterReflowLock();
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);
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);
}
// 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);
}
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(nsIFrameDebug::GetIID(), (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;
CreateRenderingContext(rootFrame, &rcx);
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(nsIFrameDebug::GetIID(), (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);
}
ExitReflowLock(PR_TRUE, PR_TRUE);
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)
{
StCaretHider caretHider(this); // stack-based class hides caret until dtor.
EnterReflowLock();
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(nsIFrameDebug::GetIID(), (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;
CreateRenderingContext(rootFrame, &rcx);
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(nsIFrameDebug::GetIID(), (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
}
ExitReflowLock(PR_TRUE, PR_TRUE);
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::ScrollFrameIntoView(nsIFrame *aFrame){
if (!aFrame)
return NS_ERROR_NULL_POINTER;
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);
// 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(kICaretIID,(void **)outCaret);
}
NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable)
{
nsresult result = NS_OK;
PRBool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
if (mCaretEnabled)
result = mCaret->SetCaretVisible(PR_TRUE);
else
result = mCaret->SetCaretVisible(PR_FALSE);
}
return result;
}
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(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();
nsIView* rootView = nsnull;
if (NS_OK == viewManager->GetRootView(rootView) && nsnull != rootView)
{
nsCOMPtr<nsIWidget> rootWidget;
if (NS_OK == rootView->GetWidget(*getter_AddRefs(rootWidget)) && rootWidget!= nsnull)
{
rootWidget->Update();
}
}
}
}
return result;
}
NS_IMETHODIMP
PresShell::ScrollHorizontal(PRBool aLeft)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
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)
{
return CompleteScroll(aForward);
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
//end implementations nsISelectionController
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
EnterReflowLock();
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(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
CreateRenderingContext(rootFrame, &rcx);
// XXX We should be using eReflowReason_StyleChange
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);
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(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow"));
}
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
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(nsnull, &child);
if (nsnull != child) {
// but the child could be wrapped in a scrollframe so lets check
nsIScrollableFrame* scrollable = nsnull;
nsresult rv = child->QueryInterface(kIScrollableFrameIID, (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(kIPageSequenceFrameIID, (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
nsresult rv = NS_OK;
nsCOMPtr<nsITimeRecorder> watch = do_QueryInterface(mStyleSet, &rv);
if (NS_SUCCEEDED(rv) && watch) {
MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", this));
watch->ResetTimer(NS_TIMER_STYLE_RESOLUTION);
}
#endif
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndLoad(nsIDocument *aDocument)
{
#ifdef DEBUG_nisheeth
if (aDocument) {
nsIURI* uri = nsnull;
if ((uri = aDocument->GetDocumentURL())) {
char* spec = nsnull;
if (NS_SUCCEEDED(uri->GetSpec(&spec))) {
printf("**** Url: '%s', Reflows: %d, Discarded Reflows: %d\n", spec, mReflows, mDiscardedReflowCommands);
Recycle(spec);
}
}
NS_RELEASE(uri);
}
#endif
#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
nsresult rv = NS_OK;
nsCOMPtr<nsITimeRecorder> watch = do_QueryInterface(mStyleSet, &rv);
if (NS_SUCCEEDED(rv) && watch) {
MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this));
watch->StopTimer(NS_TIMER_STYLE_RESOLUTION);
MOZ_TIMER_LOG(("Style resolution time (this=%p): ", this));
watch->PrintTimer(NS_TIMER_STYLE_RESOLUTION);
}
#endif
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 (!gDoAsyncReflow)
return 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_nisheeth
mDiscardedReflowCommands++;
#endif
#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
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
nsresult rv = NS_OK;
if (!AlreadyInQueue(aReflowCommand)) {
NS_ADDREF(aReflowCommand);
rv = (mReflowCommands.AppendElement(aReflowCommand) ? NS_OK : NS_ERROR_OUT_OF_MEMORY);
}
return rv;
}
NS_IMETHODIMP
PresShell::CancelReflowCommand(nsIFrame* aTargetFrame)
{
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) {
#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);
NS_RELEASE(rc);
n--;
i--;
continue;
}
}
}
}
return NS_OK;
}
//-------------- Begin Reflow Event Definition ------------------------
struct ReflowEvent : public PLEvent {
ReflowEvent(nsIPresShell* aPresShell, nsIEventQueue* aQueue);
~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.get(), this);
}
#endif
presShell->SetReflowEventStatus(PR_FALSE);
presShell->EnterReflowLock();
presShell->ProcessReflowCommands();
presShell->ExitReflowLock(PR_FALSE, 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, nsIEventQueue* aQueue)
{
NS_ASSERTION(aPresShell && aQueue, "Null parameters!");
mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell));
PL_InitEvent(this, nsnull,
(PLHandleEventProc) ::HandlePLEvent,
(PLDestroyEventProc) ::DestroyPLEvent);
aQueue->PostEvent(this);
}
//-------------- End Reflow Event Definition ---------------------------
void
PresShell::PostReflowEvent()
{
if (!mPendingReflowEvent && mReflowCommands.Count() > 0) {
ReflowEvent* ev;
ev = new ReflowEvent((nsIPresShell*) this, mEventQueue);
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", this, ev);
}
#endif
mPendingReflowEvent = PR_TRUE;
}
}
NS_IMETHODIMP
PresShell::ProcessReflowCommands()
{
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;
#ifdef DEBUG_nisheeth
mReflows++;
#endif
mFrameManager->GetRootFrame(&rootFrame);
CreateRenderingContext(rootFrame, &rcx);
#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
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);
// Dispatch the reflow command
nsSize maxSize;
rootFrame->GetSize(maxSize);
if (gDoAsyncReflow) beforeReflow = PR_Now();
rc->Dispatch(mPresContext, desiredSize, maxSize, *rcx);
if (gDoAsyncReflow) afterReflow = PR_Now();
NS_RELEASE(rc);
VERIFY_STYLE_TREE;
if (gDoAsyncReflow) {
// Enable after fixing the Mac build
// LL_SUB(diff, afterReflow, beforeReflow);
// LL_ADD(mAccumulatedReflowTime, mAccumulatedReflowTime, diff);
// if (LL_CMP(mAccumulatedReflowTime, >, gMaxRCProcessingTime))
break;
}
}
NS_IF_RELEASE(rcx);
if (gDoAsyncReflow) {
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) {
PRInt32 reflowTime;
// Enable after fixing the Mac build
// LL_L2I(reflowTime, mAccumulatedReflowTime);
printf("Time spent in PresShell::ProcessReflowCommands(), this=%p, time=%d micro seconds\n", this, reflowTime);
}
#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(nsIFrameDebug::GetIID(), (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);
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) {
mCurrentEventFrame->GetContent(&mCurrentEventContent);
mCurrentEventFrame = nsnull;
}
for (int i=0; i<mCurrentEventFrameStack.Count(); i++) {
if (aFrame == (nsIFrame*)mCurrentEventFrameStack.ElementAt(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;
}
nsIWidget *widget = nsnull;
nsIView *view = nsnull;
nsPoint pt;
nsresult rv;
aFrame->GetView(mPresContext, &view);
if (nsnull == view)
aFrame->GetOffsetFromView(mPresContext, pt, &view);
while (nsnull != view)
{
view->GetWidget(widget);
if (nsnull != widget)
{
NS_RELEASE(widget);
break;
}
view->GetParent(view);
}
nsCOMPtr<nsIDeviceContext> dx;
nsIRenderingContext* result = nsnull;
rv = mPresContext->GetDeviceContext(getter_AddRefs(dx));
if (NS_SUCCEEDED(rv) && dx) {
if (nsnull != view) {
rv = dx->CreateRenderingContext(view, 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<nsIDOMHTMLDocument> htmlDoc;
nsCOMPtr<nsIXMLDocument> xmlDoc;
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(mDocument->QueryInterface(kIDOMHTMLDocumentIID,
getter_AddRefs(htmlDoc)))) {
nsCOMPtr<nsIDOMElement> element;
// Find the element with the specified id
rv = htmlDoc->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(kIContentIID, getter_AddRefs(content));
}
}
else if (NS_SUCCEEDED(mDocument->QueryInterface(kIXMLDocumentIID,
getter_AddRefs(xmlDoc)))) {
rv = xmlDoc->GetContentById(aAnchorName, 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;
}
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 {
// 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 {
// Align the frame edge according to the specified percentage
nscoord frameAlignX = frameBounds.x + (frameBounds.width * aHPercent) / 100;
scrollOffsetX = frameAlignX - (visibleRect.width * aHPercent) / 100;
}
scrollingView->ScrollTo(scrollOffsetX, scrollOffsetY, NS_VMREFRESH_IMMEDIATE);
}
}
return rv;
}
NS_IMETHODIMP
PresShell::DoCopy()
{
nsCOMPtr<nsIDocument> doc;
GetDocument(getter_AddRefs(doc));
if (doc) {
nsString buffer;
nsresult rv;
nsIDOMSelection* sel;
GetSelection(SELECTION_NORMAL, &sel);
if (sel != nsnull)
doc->CreateXIF(buffer,sel);
NS_IF_RELEASE(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,
nsITransferable::GetIID(),
(void**) 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_PROGID, 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);
}
}
}
}
return NS_OK;
}
// XXX This function needs to be renamed to something better.
// It is not simply a getter for the layout history state. It
// creates a new state object and captures frame state onto it.
NS_IMETHODIMP
PresShell::GetHistoryState(nsILayoutHistoryState** aState)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
// Create the document state object
rv = NS_NewLayoutHistoryState(aState);
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = nsnull;
rv = GetRootFrame(&rootFrame);
if (NS_FAILED(rv) || nsnull == rootFrame) return rv;
rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, *aState);
return rv;
}
NS_IMETHODIMP
PresShell::SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState)
{
mHistoryState = aLayoutHistoryState;
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetReflowEventStatus(PRBool* aPending)
{
if (aPending)
*aPending = mPendingReflowEvent;
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetReflowEventStatus(PRBool aPending)
{
mPendingReflowEvent = aPending;
return NS_OK;
}
NS_IMETHODIMP
PresShell::ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
return rv;
}
NS_IMETHODIMP
PresShell::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentStatesChanged(mPresContext, aContent1, aContent2);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
return rv;
}
NS_IMETHODIMP
PresShell::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint)
{
EnterReflowLock();
nsresult rv = mStyleSet->AttributeChanged(mPresContext, aContent, aNameSpaceID, aAttribute, aHint);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
return rv;
}
NS_IMETHODIMP
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
EnterReflowLock();
MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_START(mFrameCreationWatch);
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);
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
return rv;
}
NS_IMETHODIMP
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentInserted(mPresContext, aContainer, aChild, aIndexInContainer);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, !gDoAsyncReflow);
return rv;
}
NS_IMETHODIMP
PresShell::ContentReplaced(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentReplaced(mPresContext, aContainer, aOldChild,
aNewChild, aIndexInContainer);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
return rv;
}
NS_IMETHODIMP
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentRemoved(mPresContext, aContainer,
aChild, aIndexInContainer);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
return rv;
}
nsresult
PresShell::ReconstructFrames(void)
{
nsresult rv = NS_OK;
EnterReflowLock();
rv = mStyleSet->ReconstructDocElementHierarchy(mPresContext);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
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)
{
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
EnterReflowLock();
nsresult rv = mStyleSet->StyleRuleChanged(mPresContext, aStyleSheet,
aStyleRule, aHint);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
return rv;
}
NS_IMETHODIMP
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
EnterReflowLock();
nsresult rv = mStyleSet->StyleRuleAdded(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
if (NS_FAILED(rv)) {
return rv;
}
// XXX For now reconstruct everything
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
EnterReflowLock();
nsresult rv = mStyleSet->StyleRuleRemoved(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
ExitReflowLock(PR_TRUE, PR_TRUE);
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(kISupportsIID, (void**)aResult);
}
}
return result;
}
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
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)
{
StCaretHider caretHider(this); // stack-based class hides caret until dtor.
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);
#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);
}
#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;
}
void
PresShell::PushCurrentEventFrame()
{
if (mCurrentEventFrame) {
mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0);
}
}
void
PresShell::PopCurrentEventFrame()
{
mCurrentEventFrame = nsnull;
if (0 != mCurrentEventFrameStack.Count()) {
mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
}
}
NS_IMETHODIMP
PresShell::HandleEvent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
void* clientData;
nsIFrame* frame;
nsresult rv = NS_OK;
NS_ASSERTION(!(nsnull == aView), "null view");
if (mIsDestroying || mReflowLockCount > 0) {
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) {
PushCurrentEventFrame();
nsIEventStateManager *manager;
nsIContent* focusContent = nsnull;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
if (NS_IS_KEY_EVENT(aEvent)) {
//Key events go to the focused frame, not point based.
manager->GetFocusedContent(&focusContent);
if (focusContent)
GetPrimaryFrameFor(focusContent, &mCurrentEventFrame);
else frame->GetFrameForPoint(mPresContext, aEvent->point, &mCurrentEventFrame);
}
else {
frame->GetFrameForPoint(mPresContext, aEvent->point, &mCurrentEventFrame);
}
NS_IF_RELEASE(mCurrentEventContent);
if (GetCurrentEventFrame() || focusContent) {
//Once we have the targetFrame, handle the event in this order
//1. Give event to event manager for pre event state changes and generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aEventStatus, aView);
//2. Give event to the DOM for third party and JS use.
if ((GetCurrentEventFrame() || focusContent) && NS_OK == rv) {
if (focusContent) {
rv = focusContent->HandleDOMEvent(mPresContext, (nsEvent*)aEvent, nsnull,
NS_EVENT_FLAG_INIT, aEventStatus);
}
else {
nsIContent* targetContent;
if (NS_OK == mCurrentEventFrame->GetContent(&targetContent) && nsnull != targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, (nsEvent*)aEvent, nsnull,
NS_EVENT_FLAG_INIT, aEventStatus);
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) {
rv = mCurrentEventFrame->HandleEvent(mPresContext, aEvent, aEventStatus);
}
//4. Give event to event manager for post event state changes and generation of synthetic events.
if ((GetCurrentEventFrame() || focusContent) && NS_OK == rv) {
rv = manager->PostHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aEventStatus, aView);
}
}
}
NS_RELEASE(manager);
NS_IF_RELEASE(focusContent);
}
PopCurrentEventFrame();
}
else {
rv = NS_OK;
}
return rv;
}
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);
}
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIScrollableView.h"
#include "nsIDeviceContext.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_IID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_IID(kIViewManagerIID, NS_IVIEWMANAGER_IID);
static NS_DEFINE_IID(kScrollingViewCID, NS_SCROLLING_VIEW_CID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
static NS_DEFINE_IID(kWidgetCID, NS_CHILD_CID);
static NS_DEFINE_IID(kILinkHandlerIID, NS_ILINKHANDLER_IID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name = "(null)";
}
fputs(name, stdout);
printf(" != ");
if (nsnull != k2) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name = "(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: ");
nsAutoString name;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->GetFrameName(name);
fputs(name, stdout);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != ");
if (NS_SUCCEEDED(k2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->GetFrameName(name);
fputs(name, stdout);
}
printf("{%d, %d, %d, %d}", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static PRBool
CompareTrees(nsIPresContext* aPresContext, nsIFrame* aA, nsIFrame* aB)
{
PRBool ok = PR_TRUE;
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* k1, *k2;
aA->FirstChild(listName, &k1);
aB->FirstChild(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(aPresContext, &v1);
k2->GetView(aPresContext, &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;
}
// Compare the sub-trees too
if (!CompareTrees(aPresContext, k1, 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;
aA->GetAdditionalChildListName(listIndex, &listName1);
aB->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
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;
}
#ifdef DEBUG
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
PRBool
PresShell::VerifyIncrementalReflow()
{
// 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);
}
#if 1
nsISupports* container;
if (NS_SUCCEEDED(mPresContext->GetContainer(&container)) &&
(nsnull != container)) {
cx->SetContainer(container);
nsILinkHandler* lh;
if (NS_SUCCEEDED(container->QueryInterface(kILinkHandlerIID,
(void**)&lh))) {
cx->SetLinkHandler(lh);
NS_RELEASE(lh);
}
NS_RELEASE(container);
}
#endif
NS_ASSERTION(NS_OK == rv, "failed to create presentation context");
nsCOMPtr<nsIDeviceContext> dc;
mPresContext->GetDeviceContext(getter_AddRefs(dc));
nsCOMPtr<nsIPref> prefs;
mPresContext->GetPrefs(getter_AddRefs(prefs));
cx->Init(dc, prefs);
// Get our scrolling preference
nsScrollPreference scrolling;
nsIView* rootView;
mViewManager->GetRootView(rootView);
nsIScrollableView* scrollView;
rv = rootView->QueryInterface(kScrollViewIID, (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,
kIViewManagerIID, (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,
kIViewIID, (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);
NS_ASSERTION(NS_OK == rv, "failed to create presentation shell");
vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh));
sh->InitialReflow(r.width, r.height);
// 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);
#if 0
root1 = FindTopFrame(root1);
root2 = FindTopFrame(root2);
#endif
PRBool ok = CompareTrees(mPresContext, root1, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(root1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
printf("Verification tree:\n");
if (NS_SUCCEEDED(root2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
}
// printf("Incremental reflow doomed view tree:\n");
// view->List(stdout, 1);
// view->SetVisibility(nsViewVisibility_kHide);
cx->Stop();
cx->SetContainer(nsnull);
NS_RELEASE(cx);
sh->EndObservingDocument();
NS_RELEASE(sh);
NS_RELEASE(vm);
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)
{
result = mPresShell->GetCaretEnabled(&mWasVisible);
if (NS_SUCCEEDED(result) && mWasVisible)
result = mPresShell->SetCaretEnabled(PR_FALSE);
}
++mCallCount;
return result;
}
nsresult
PresShellViewEventListener::RestoreCaretVisibility()
{
nsresult result = NS_OK;
--mCallCount;
if (mPresShell && 0 == mCallCount && mWasVisible)
result = mPresShell->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();
}
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