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gecko-dev/layout/base/nsPresShell.cpp
sfraser%netscape.com 2a8b787470 Add code to show a caret (#ifdeffed out for now)
1999-02-12 00:02:56 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#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 "nsFrame.h"
#include "nsIReflowCommand.h"
#include "nsIViewManager.h"
#include "nsCRT.h"
#include "plhash.h"
#include "prlog.h"
#include "prthread.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 "nsIFrameSelection.h"
#include "nsIDOMSelection.h"
#include "nsLayoutCID.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsXPComCIID.h"
#include "nsIServiceManager.h"
#include "nsICaret.h"
#include "nsCaretProperties.h"
static PRBool gsNoisyRefs = PR_FALSE;
#undef NOISY
// comment out to hide caret
//#define SHOW_CARET
static PLHashNumber
HashKey(nsIFrame* key)
{
return (PLHashNumber) key;
}
static PRIntn
CompareKeys(nsIFrame* key1, nsIFrame* key2)
{
return key1 == key2;
}
class FrameHashTable {
public:
FrameHashTable();
~FrameHashTable();
void* Get(nsIFrame* aKey);
void* Put(nsIFrame* aKey, void* aValue);
void* Remove(nsIFrame* aKey);
protected:
PLHashTable* mTable;
};
FrameHashTable::FrameHashTable()
{
mTable = PL_NewHashTable(8, (PLHashFunction) HashKey,
(PLHashComparator) CompareKeys,
(PLHashComparator) nsnull,
nsnull, nsnull);
}
FrameHashTable::~FrameHashTable()
{
PL_HashTableDestroy(mTable);
}
/**
* Get the data associated with a frame.
*/
void*
FrameHashTable::Get(nsIFrame* aKey)
{
PRInt32 hashCode = (PRInt32) aKey;
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
if (nsnull != he) {
return he->value;
}
return nsnull;
}
/**
* Create an association between a frame and some data. This call
* returns an old association if there was one (or nsnull if there
* wasn't).
*/
void*
FrameHashTable::Put(nsIFrame* aKey, void* aData)
{
PRInt32 hashCode = (PRInt32) aKey;
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
if (nsnull != he) {
void* oldValue = he->value;
he->value = aData;
return oldValue;
}
PL_HashTableRawAdd(mTable, hep, hashCode, aKey, aData);
return nsnull;
}
/**
* Remove an association between a frame and it's data. This returns
* the old associated data.
*/
void*
FrameHashTable::Remove(nsIFrame* aKey)
{
PRInt32 hashCode = (PRInt32) aKey;
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, aKey);
PLHashEntry* he = *hep;
void* oldValue = nsnull;
if (nsnull != he) {
oldValue = he->value;
PL_HashTableRawRemove(mTable, hep, he);
}
return oldValue;
}
//----------------------------------------------------------------------
// Class IID's
static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_IID(kRangeListCID, NS_RANGELIST_CID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_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(kIEventQueueServiceIID, NS_IEVENTQUEUESERVICE_IID);
static NS_DEFINE_IID(kICaretID, NS_ICARET_IID);
class PresShell : public nsIPresShell, public nsIViewObserver,
private nsIDocumentObserver, public nsIFocusTracker
{
public:
PresShell();
void* operator new(size_t sz) {
void* rv = new char[sz];
nsCRT::zero(rv, sz);
return rv;
}
// nsISupports
NS_DECL_ISUPPORTS
// 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 AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
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);
// nsIPresShell
NS_IMETHOD Init(nsIDocument* aDocument,
nsIPresContext* aPresContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet);
virtual nsIDocument* GetDocument();
virtual nsIPresContext* GetPresContext();
virtual nsIViewManager* GetViewManager();
virtual nsIStyleSet* GetStyleSet();
NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle);
NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle);
NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList);
virtual nsresult GetSelection(nsIDOMSelection **aSelection);
NS_IMETHOD EnterReflowLock();
NS_IMETHOD ExitReflowLock();
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*& aPageSequenceFrame) const;
NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent, nsIFrame*& aPrimaryFrame) const;
NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const;
NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame*& aPlaceholderFrame) const;
NS_IMETHOD SetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame* aPlaceholderFrame);
NS_IMETHOD AppendReflowCommand(nsIReflowCommand* aReflowCommand);
NS_IMETHOD ProcessReflowCommands();
virtual void ClearFrameRefs(nsIFrame*);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
//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 SetFocus(nsIFrame *aFrame, nsIFrame *aAnchorFrame);
NS_IMETHOD GetFocus(nsIFrame **aFrame, nsIFrame **aAnchorFrame);
// implementation
void HandleCantRenderReplacedElementEvent(nsIFrame* aFrame);
protected:
~PresShell();
nsresult ReconstructFrames(void);
#ifdef NS_DEBUG
void VerifyIncrementalReflow();
PRBool mInVerifyReflow;
#endif
nsIDocument* mDocument;
nsIPresContext* mPresContext;
nsIStyleSet* mStyleSet;
nsIFrame* mRootFrame;
nsIViewManager* mViewManager;
PRUint32 mUpdateCount;
nsVoidArray mReflowCommands;
PRUint32 mReflowLockCount;
PRBool mIsDestroying;
nsIFrame* mCurrentEventFrame;
nsIFrame* mFocusEventFrame; //keeps track of which frame has focus.
nsIFrame* mAnchorEventFrame; //keeps track of which frame has focus.
nsCOMPtr<nsIFrameSelection> mSelection;
nsCOMPtr<nsICaret> mCaret;
FrameHashTable* mPlaceholderMap;
};
#ifdef NS_DEBUG
/**
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule = PR_NewLogModule("verifyreflow");
#endif
static PRBool gVerifyReflow = PRBool(0x55);
static PRBool gVerifyReflowAll;
NS_LAYOUT PRBool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
if (gVerifyReflow == PRBool(0x55)) {
gVerifyReflow = 0 != gLogModule->level;
if (gLogModule->level > 1) {
gVerifyReflowAll = PR_TRUE;
}
printf("Note: verifyreflow is %sabled",
gVerifyReflow ? "en" : "dis");
if (gVerifyReflowAll) {
printf(" (diff all enabled)\n");
}
else {
printf("\n");
}
}
#endif
return gVerifyReflow;
}
NS_LAYOUT void
nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled)
{
gVerifyReflow = 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()
{
//XXX joki 11/17 - temporary event hack.
mIsDestroying = PR_FALSE;
}
#ifdef NS_DEBUG
// for debugging only
nsrefcnt PresShell::AddRef(void)
{
if (gsNoisyRefs) printf("PresShell: AddRef: %x, cnt = %d \n",this, mRefCnt+1);
return ++mRefCnt;
}
// for debugging only
nsrefcnt PresShell::Release(void)
{
if (gsNoisyRefs==PR_TRUE) printf("PresShell Release: %x, cnt = %d \n",this, mRefCnt-1);
if (--mRefCnt == 0) {
if (gsNoisyRefs==PR_TRUE) printf("PresShell Delete: %x, \n",this);
delete this;
return 0;
}
return mRefCnt;
}
#else
NS_IMPL_ADDREF(PresShell)
NS_IMPL_RELEASE(PresShell)
#endif
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(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;
if (nsnull != mRootFrame) {
mRootFrame->DeleteFrame(*mPresContext);
}
NS_IF_RELEASE(mViewManager);
//Release mPresContext after mViewManager
NS_IF_RELEASE(mPresContext);
NS_IF_RELEASE(mStyleSet);
if (nsnull != mDocument) {
mDocument->DeleteShell(this);
NS_RELEASE(mDocument);
}
mRefCnt = 0;
delete mPlaceholderMap;
}
/**
* 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 (nsnull != mDocument) {
return NS_ERROR_ALREADY_INITIALIZED;
}
mDocument = aDocument;
NS_ADDREF(aDocument);
mViewManager = aViewManager;
NS_ADDREF(mViewManager);
//doesn't add a ref since we own it... MMP
mViewManager->SetViewObserver((nsIViewObserver *)this);
// Bind the context to the presentation shell.
mPresContext = aPresContext;
NS_ADDREF(aPresContext);
aPresContext->SetShell(this);
mStyleSet = aStyleSet;
NS_ADDREF(aStyleSet);
nsCOMPtr<nsIDOMSelection>domselection;
nsresult result = nsRepository::CreateInstance(kRangeListCID, nsnull,
kIDOMSelectionIID,
getter_AddRefs(domselection));
if (!NS_SUCCEEDED(result))
return result;
result = domselection->QueryInterface(kIDOMSelectionIID,
getter_AddRefs(mSelection));
if (!NS_SUCCEEDED(result))
return result;
// XXX This code causes the document object (and the entire content model) to be leaked...
#if 0
nsCOMPtr<nsIDOMRange>range;
if (NS_SUCCEEDED(nsRepository::CreateInstance(kCRangeCID, nsnull, kIDOMRangeIID, getter_AddRefs(range)))){ //create an irange
nsCOMPtr<nsIDocument>doc(GetDocument());
nsCOMPtr<nsIDOMDocument>domDoc(doc);
if (domDoc){
nsCOMPtr<nsIDOMElement> domElement;
if (NS_SUCCEEDED(domDoc->GetDocumentElement(getter_AddRefs(domElement)))) {//get the first element from the dom
nsCOMPtr<nsIDOMNode>domNode(domElement);
if (domNode) {//get the node interface for the range object
range->SetStart(domNode,0);
range->SetEnd(domNode,0);
nsCOMPtr<nsISupports>rangeISupports(range);
if (rangeISupports) {
selection->AddItem(rangeISupports);
}
}
}
}
}
#endif
mSelection = selection;
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
nsCaretProperties *caretProperties = NewCaretProperties();
// make the caret
nsresult err = NS_NewCaret(getter_AddRefs(mCaret));
if (NS_SUCCEEDED(err))
mCaret->Init(this, caretProperties);
delete caretProperties;
caretProperties = nsnull;
#endif
return NS_OK;
}
NS_METHOD
PresShell::EnterReflowLock()
{
++mReflowLockCount;
return NS_OK;
}
NS_METHOD
PresShell::ExitReflowLock()
{
PRUint32 newReflowLockCount = mReflowLockCount - 1;
if (newReflowLockCount == 0) {
ProcessReflowCommands();
}
mReflowLockCount = newReflowLockCount;
return NS_OK;
}
nsIDocument*
PresShell::GetDocument()
{
NS_IF_ADDREF(mDocument);
return mDocument;
}
nsIPresContext*
PresShell::GetPresContext()
{
NS_IF_ADDREF(mPresContext);
return mPresContext;
}
nsIViewManager*
PresShell::GetViewManager()
{
NS_IF_ADDREF(mViewManager);
return mViewManager;
}
nsIStyleSet*
PresShell::GetStyleSet()
{
NS_IF_ADDREF(mStyleSet);
return mStyleSet;
}
NS_IMETHODIMP
PresShell::GetActiveAlternateStyleSheet(nsString& aSheetTitle)
{ // first non-html sheet in style set that has title
if (nsnull != 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 ((nsnull != mDocument) && (nsnull != 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 (nsnull != 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;
}
nsresult
PresShell::GetSelection(nsIDOMSelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->QueryInterface(kIDOMSelectionIID,(void **)aSelection);
}
// Make shell be a document observer
NS_IMETHODIMP
PresShell::BeginObservingDocument()
{
if (nsnull != mDocument) {
mDocument->AddObserver(this);
}
return NS_OK;
}
// Make shell stop being a document observer
NS_IMETHODIMP
PresShell::EndObservingDocument()
{
if (nsnull != mDocument) {
mDocument->RemoveObserver(this);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
nsIContent* root = nsnull;
EnterReflowLock();
if (nsnull != mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
if (nsnull != mDocument) {
root = mDocument->GetRootContent();
}
if (nsnull != root) {
if (nsnull == mRootFrame) {
// Have style sheet processor construct a frame for the
// precursors to the root content object's frame
mStyleSet->ConstructRootFrame(mPresContext, root, mRootFrame);
}
// Have the style sheet processor construct frame for the root
// content object down
mStyleSet->ContentInserted(mPresContext, nsnull, root, 0);
NS_RELEASE(root);
}
if (nsnull != mRootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::InitialReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIHTMLReflow* htmlReflow;
nsIRenderingContext* rcx = nsnull;
CreateRenderingContext(mRootFrame, rcx);
nsHTMLReflowState reflowState(*mPresContext, mRootFrame,
eReflowReason_Initial, maxSize, rcx);
if (NS_OK == mRootFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
htmlReflow->Reflow(*mPresContext, desiredSize, reflowState, status);
mRootFrame->SizeTo(desiredSize.width, desiredSize.height);
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
}
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::InitialReflow"));
}
ExitReflowLock();
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
EnterReflowLock();
if (nsnull != 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...
if (nsnull != mRootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::ResizeReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIHTMLReflow* htmlReflow;
nsIRenderingContext* rcx = nsnull;
CreateRenderingContext(mRootFrame, rcx);
nsHTMLReflowState reflowState(*mPresContext, mRootFrame,
eReflowReason_Resize, maxSize, rcx);
if (NS_OK == mRootFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
htmlReflow->Reflow(*mPresContext, desiredSize, reflowState, status);
mRootFrame->SizeTo(desiredSize.width, desiredSize.height);
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
}
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::ResizeReflow"));
if (mSelection)
mSelection->ResetSelection(this, mRootFrame);
// XXX if debugging then we should assert that the cache is empty
} else {
#ifdef NOISY
printf("PresShell::ResizeReflow: null root frame\n");
#endif
}
ExitReflowLock();
return NS_OK; //XXX this needs to be real. MMP
}
//it is ok to pass null, it will simply ignore that parameter.
//if necessary we can add a clear focus, but I dont think it is a big
//deal.
NS_IMETHODIMP
PresShell::SetFocus(nsIFrame *aFrame, nsIFrame *aAnchorFrame){
if (aFrame)
mFocusEventFrame = aFrame;
if (aAnchorFrame)
mAnchorEventFrame = aAnchorFrame;
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetFocus(nsIFrame **aFrame, nsIFrame **aAnchorFrame){
if (!aFrame || !aAnchorFrame)
return NS_ERROR_NULL_POINTER;
*aFrame = mFocusEventFrame;
*aAnchorFrame = mAnchorEventFrame;
return NS_OK;
}
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
EnterReflowLock();
if (nsnull != mRootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::StyleChangeReflow"));
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIHTMLReflow* htmlReflow;
nsIRenderingContext* rcx = nsnull;
CreateRenderingContext(mRootFrame, rcx);
// XXX We should be using eReflowReason_StyleChange
nsHTMLReflowState reflowState(*mPresContext, mRootFrame,
eReflowReason_Resize, maxSize, rcx);
if (NS_OK == mRootFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
htmlReflow->Reflow(*mPresContext, desiredSize, reflowState, status);
mRootFrame->SizeTo(desiredSize.width, desiredSize.height);
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
#endif
}
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow"));
}
ExitReflowLock();
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::GetRootFrame(nsIFrame*& aFrame) const
{
aFrame = mRootFrame;
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPageSequenceFrame(nsIPageSequenceFrame*& aPageSequenceFrame) const
{
nsIFrame* child;
nsIPageSequenceFrame* pageSequence;
// The page sequence frame should be either the immediate child or
// its child
mRootFrame->FirstChild(nsnull, &child);
if (nsnull != child) {
if (NS_SUCCEEDED(child->QueryInterface(kIPageSequenceFrameIID, (void**)&pageSequence))) {
aPageSequenceFrame = pageSequence;
return NS_OK;
}
child->FirstChild(nsnull, &child);
if (nsnull != child) {
if (NS_SUCCEEDED(child->QueryInterface(kIPageSequenceFrameIID, (void**)&pageSequence))) {
aPageSequenceFrame = pageSequence;
return NS_OK;
}
}
}
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)
{
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndLoad(nsIDocument *aDocument)
{
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;
}
NS_IMETHODIMP
PresShell::AppendReflowCommand(nsIReflowCommand* aReflowCommand)
{
#ifdef NS_DEBUG
if (mInVerifyReflow) {
return NS_OK;
}
#endif
NS_ADDREF(aReflowCommand);
return mReflowCommands.AppendElement(aReflowCommand);
}
NS_IMETHODIMP
PresShell::ProcessReflowCommands()
{
if (0 != mReflowCommands.Count()) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsIRenderingContext* rcx;
CreateRenderingContext(mRootFrame, rcx);
while (0 != mReflowCommands.Count()) {
nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(0);
mReflowCommands.RemoveElementAt(0);
// Dispatch the reflow command
nsSize maxSize;
mRootFrame->GetSize(maxSize);
#ifdef NS_DEBUG
nsIReflowCommand::ReflowType type;
rc->GetType(type);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("PresShell::ProcessReflowCommands: begin reflow command type=%d",
type));
#endif
rc->Dispatch(*mPresContext, desiredSize, maxSize, *rcx);
NS_RELEASE(rc);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("PresShell::ProcessReflowCommands: end reflow command"));
}
NS_IF_RELEASE(rcx);
// Place and size the root frame
mRootFrame->SizeTo(desiredSize.width, desiredSize.height);
#ifdef NS_DEBUG
if (nsIFrame::GetVerifyTreeEnable()) {
mRootFrame->VerifyTree();
}
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
if (gVerifyReflowAll) {
printf("Before verify-reflow\n");
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->UpdateView(rootView, nsnull, NS_VMREFRESH_IMMEDIATE);
PR_Sleep(PR_SecondsToInterval(3));
}
mInVerifyReflow = PR_TRUE;
VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
if (gVerifyReflowAll) {
printf("After verify-reflow\n");
}
if (0 != mReflowCommands.Count()) {
printf("XXX yikes!\n");
}
}
#endif
}
return NS_OK;
}
void
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
manager->ClearFrameRefs(aFrame);
NS_RELEASE(manager);
}
if (aFrame == mCurrentEventFrame) {
mCurrentEventFrame = nsnull;
}
if (aFrame == mFocusEventFrame) {
mFocusEventFrame = nsnull;
}
}
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext)
{
nsIWidget *widget = nsnull;
nsIView *view = nsnull;
nsPoint pt;
nsresult rv;
aFrame->GetView(&view);
if (nsnull == view)
aFrame->GetOffsetFromView(pt, &view);
while (nsnull != view)
{
view->GetWidget(widget);
if (nsnull != widget)
{
NS_RELEASE(widget);
break;
}
view->GetParent(view);
}
nsIDeviceContext *dx;
dx = mPresContext->GetDeviceContext();
if (nsnull != view)
rv = dx->CreateRenderingContext(view, aContext);
else
rv = dx->CreateRenderingContext(aContext);
NS_RELEASE(dx);
return rv;
}
void
PresShell::HandleCantRenderReplacedElementEvent(nsIFrame* aFrame)
{
// Double-check that we haven't deleted the frame hierarchy
// XXX If we stay with this model we approach, then we need to observe
// aFrame and if it's deleted null out the pointer in the PL event struct
if (nsnull != mRootFrame) {
mStyleSet->CantRenderReplacedElement(mPresContext, aFrame);
ProcessReflowCommands();
}
}
struct CantRenderReplacedElementEvent : public PLEvent {
CantRenderReplacedElementEvent(PresShell* aShell, nsIFrame* aFrame);
~CantRenderReplacedElementEvent();
PresShell* mShell;
nsIFrame* mFrame;
};
static void PR_CALLBACK
HandlePLEvent(CantRenderReplacedElementEvent* aEvent)
{
aEvent->mShell->HandleCantRenderReplacedElementEvent(aEvent->mFrame);
}
static void PR_CALLBACK
DestroyPLEvent(CantRenderReplacedElementEvent* aEvent)
{
delete aEvent;
}
CantRenderReplacedElementEvent::CantRenderReplacedElementEvent(PresShell* aShell,
nsIFrame* aFrame)
{
mShell = aShell;
NS_ADDREF(mShell);
mFrame = aFrame;
PL_InitEvent(this, nsnull, (PLHandleEventProc)::HandlePLEvent,
(PLDestroyEventProc)::DestroyPLEvent);
}
CantRenderReplacedElementEvent::~CantRenderReplacedElementEvent()
{
NS_RELEASE(mShell);
}
NS_IMETHODIMP
PresShell::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
#ifdef _WIN32
nsIEventQueueService* eventService;
nsresult rv;
// Notify the style set, but post the notification so it doesn't happen
// now
rv = nsServiceManager::GetService(kEventQueueServiceCID,
kIEventQueueServiceIID,
(nsISupports **)&eventService);
if (NS_SUCCEEDED(rv)) {
PLEventQueue* eventQueue;
rv = eventService->GetThreadEventQueue(PR_GetCurrentThread(),
&eventQueue);
nsServiceManager::ReleaseService(kEventQueueServiceCID, eventService);
if (nsnull != eventQueue) {
CantRenderReplacedElementEvent* ev;
ev = new CantRenderReplacedElementEvent(this, aFrame);
PL_PostEvent(eventQueue, ev);
}
}
return rv;
#else
return NS_OK;
#endif
}
#ifdef NS_DEBUG
static char*
ContentTag(nsIContent* aContent, PRIntn aSlot)
{
static char buf0[100], buf1[100], buf2[100];
static char* bufs[] = { buf0, buf1, buf2 };
char* buf = bufs[aSlot];
nsIAtom* atom;
aContent->GetTag(atom);
if (nsnull != atom) {
nsAutoString tmp;
atom->ToString(tmp);
tmp.ToCString(buf, 100);
}
else {
buf[0] = 0;
}
return buf;
}
#endif
NS_IMETHODIMP
PresShell::ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent)
{
NS_PRECONDITION(nsnull != mRootFrame, "null root frame");
EnterReflowLock();
nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent);
ExitReflowLock();
if (mSelection)
mSelection->ResetSelection(this, mRootFrame);
return rv;
}
NS_IMETHODIMP
PresShell::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsIAtom* aAttribute,
PRInt32 aHint)
{
NS_PRECONDITION(nsnull != mRootFrame, "null root frame");
EnterReflowLock();
nsresult rv = mStyleSet->AttributeChanged(mPresContext, aContent, aAttribute, aHint);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentAppended(mPresContext, aContainer, aNewIndexInContainer);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentInserted(mPresContext, aContainer, aChild, aIndexInContainer);
ExitReflowLock();
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);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
EnterReflowLock();
nsresult rv = mStyleSet->ContentRemoved(mPresContext, aContainer,
aChild, aIndexInContainer);
ExitReflowLock();
return rv;
}
nsresult
PresShell::ReconstructFrames(void)
{
nsresult rv = NS_OK;
if (nsnull != mRootFrame) {
if (nsnull != mDocument) {
nsIContent* rootContent = mDocument->GetRootContent();
if (nsnull != rootContent) {
nsIFrame* docElementFrame;
nsIFrame* parentFrame;
// Get the frame that corresponds to the document element
GetPrimaryFrameFor(rootContent, docElementFrame);
if (nsnull != docElementFrame) {
docElementFrame->GetParent(&parentFrame);
EnterReflowLock();
rv = mStyleSet->ReconstructFrames(mPresContext, rootContent,
parentFrame, docElementFrame);
ExitReflowLock();
NS_RELEASE(rootContent);
}
}
}
}
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);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
EnterReflowLock();
nsresult rv = mStyleSet->StyleRuleAdded(mPresContext, aStyleSheet, aStyleRule);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
EnterReflowLock();
nsresult rv = mStyleSet->StyleRuleRemoved(mPresContext, aStyleSheet, aStyleRule);
ExitReflowLock();
return rv;
}
NS_IMETHODIMP
PresShell::DocumentWillBeDestroyed(nsIDocument *aDocument)
{
return NS_OK;
}
static PRBool
IsZeroSizedFrame(nsIFrame *aFrame)
{
nsSize size;
aFrame->GetSize(size);
return ((0 == size.width) && (0 == size.height));
}
static nsIFrame*
FindFrameWithContent(nsIFrame* aFrame, nsIContent* aContent)
{
nsIContent* frameContent;
aFrame->GetContent(&frameContent);
if (frameContent == aContent) {
nsIStyleContext* styleContext;
nsIAtom* pseudoTag;
PRBool isPlaceholder = PR_FALSE;
// If it's a placeholder frame, then ignore it and keep looking for the
// primary frame
aFrame->GetStyleContext(&styleContext);
styleContext->GetPseudoType(pseudoTag);
if (pseudoTag == nsHTMLAtoms::placeholderPseudo) {
isPlaceholder = PR_TRUE;
}
NS_RELEASE(styleContext);
NS_IF_RELEASE(pseudoTag);
if (!isPlaceholder) {
NS_IF_RELEASE(frameContent);
return aFrame;
}
}
NS_IF_RELEASE(frameContent);
// Search for the frame in each child list that aFrame supports
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* kid;
aFrame->FirstChild(listName, &kid);
while (nsnull != kid) {
nsIFrame* result = FindFrameWithContent(kid, aContent);
if (nsnull != result) {
NS_IF_RELEASE(listName);
return result;
}
kid->GetNextSibling(&kid);
}
NS_IF_RELEASE(listName);
aFrame->GetAdditionalChildListName(listIndex++, &listName);
} while(nsnull != listName);
return nsnull;
}
NS_IMETHODIMP
PresShell::GetPrimaryFrameFor(nsIContent* aContent, nsIFrame*& aPrimaryFrame) const
{
// For the time being do a brute force depth-first search of
// the frame tree
aPrimaryFrame = ::FindFrameWithContent(mRootFrame, aContent);
return NS_OK;
}
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*& aPlaceholderFrame) const
{
NS_PRECONDITION(nsnull != aFrame, "no frame");
if (nsnull == mPlaceholderMap) {
aPlaceholderFrame = nsnull;
} else {
aPlaceholderFrame = (nsIFrame*)mPlaceholderMap->Get(aFrame);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame* aPlaceholderFrame)
{
NS_PRECONDITION(nsnull != aFrame, "no frame");
if (nsnull == mPlaceholderMap) {
mPlaceholderMap = new FrameHashTable;
if (nsnull == mPlaceholderMap) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
if (nsnull == aPlaceholderFrame) {
mPlaceholderMap->Remove(aFrame);
} else {
mPlaceholderMap->Put(aFrame, (void*)aPlaceholderFrame);
}
return NS_OK;
}
//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) {
rv = frame->Paint(*mPresContext, aRenderingContext, aDirtyRect,
eFramePaintLayer_Underlay);
rv = frame->Paint(*mPresContext, aRenderingContext, aDirtyRect,
eFramePaintLayer_Content);
rv = frame->Paint(*mPresContext, aRenderingContext, aDirtyRect,
eFramePaintLayer_Overlay);
#ifdef NS_DEBUG
// Draw a border around the frame
if (nsIFrame::GetShowFrameBorders()) {
nsRect r;
frame->GetRect(r);
aRenderingContext.SetColor(NS_RGB(0,0,255));
aRenderingContext.DrawRect(0, 0, r.width, r.height);
}
#endif
}
return rv;
}
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 (nsnull != frame) {
if (mSelection && mFocusEventFrame && aEvent->eventStructType == NS_KEY_EVENT)
{
mSelection->HandleKeyEvent((nsIFocusTracker *)this, aEvent, mFocusEventFrame);
}
frame->GetFrameForPoint(aEvent->point, &mCurrentEventFrame);
if (nsnull != mCurrentEventFrame) {
//Once we have the targetFrame, handle the event in this order
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
//1. Give event to event manager for pre event state changes and generation of synthetic events.
rv = manager->PreHandleEvent(*mPresContext, aEvent, mCurrentEventFrame, aEventStatus);
//2. Give event to the DOM for third party and JS use.
if (nsnull != mCurrentEventFrame && NS_OK == rv) {
nsIContent* targetContent;
if (NS_OK == mCurrentEventFrame->GetContent(&targetContent) && nsnull != targetContent) {
rv = targetContent->HandleDOMEvent(*mPresContext, (nsEvent*)aEvent, nsnull,
DOM_EVENT_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 (nsnull != mCurrentEventFrame && 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 (nsnull != mCurrentEventFrame && NS_OK == rv) {
rv = manager->PostHandleEvent(*mPresContext, aEvent, mCurrentEventFrame, aEventStatus);
}
}
}
NS_RELEASE(manager);
}
}
}
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"
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 void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
k1->GetFrameName(name);
}
else {
name = "(null)";
}
fputs(name, stdout);
printf(" != ");
if (nsnull != k2) {
k2->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;
k1->GetFrameName(name);
fputs(name, stdout);
stdout << r1;
printf(" != ");
k2->GetFrameName(name);
fputs(name, stdout);
stdout << r2;
printf(" %s\n", aMsg);
if (gVerifyReflowAll) {
k1->List(stdout, 1);
k2->List(stdout, 1);
}
}
static void
CompareTrees(nsIFrame* aA, nsIFrame* aB)
{
PRBool whoops = PR_FALSE;
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) {
LogVerifyMessage(k1, k2, "child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (!gVerifyReflowAll) {
break;
}
}
nsRect r1, r2;
nsIView* v1, *v2;
nsIWidget* w1, *w2;
for (;;) {
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
LogVerifyMessage(k1, k2, "child lists are different\n");
whoops = PR_TRUE;
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
k1->GetRect(r1);
k2->GetRect(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(frame rects)", r1, r2);
whoops = PR_TRUE;
}
// 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(&v1);
k2->GetView(&v2);
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
LogVerifyMessage(k1, k2, "child views are not matched\n");
whoops = PR_TRUE;
}
else if (nsnull != v1) {
v1->GetBounds(r1);
v2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(view rects)", r1, r2);
whoops = PR_TRUE;
}
v1->GetWidget(w1);
v2->GetWidget(w2);
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
whoops = PR_TRUE;
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
whoops = PR_TRUE;
}
}
}
if (whoops && !gVerifyReflowAll) {
break;
}
// Compare the sub-trees too
CompareTrees(k1, k2);
// Advance to next sibling
k1->GetNextSibling(&k1);
k2->GetNextSibling(&k2);
}
else {
break;
}
}
if (whoops && !gVerifyReflowAll) {
break;
}
NS_IF_RELEASE(listName);
nsIAtom* listName1;
nsIAtom* listName2;
aA->GetAdditionalChildListName(listIndex, &listName1);
aB->GetAdditionalChildListName(listIndex, &listName2);
listIndex++;
if (listName1 != listName2) {
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 (listName != nsnull);
}
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
void
PresShell::VerifyIncrementalReflow()
{
// All the stuff we are creating that needs releasing
nsIPresContext* cx;
nsIViewManager* vm;
nsIView* view;
nsIPresShell* sh;
// Create a presentation context to view the new frame tree
nsresult rv;
if (mPresContext->IsPaginated()) {
rv = NS_NewPrintPreviewContext(&cx);
}
else {
rv = NS_NewGalleyContext(&cx);
}
NS_ASSERTION(NS_OK == rv, "failed to create presentation context");
nsIDeviceContext* dc = mPresContext->GetDeviceContext();
nsIPref* prefs;
mPresContext->GetPrefs(prefs);
cx->Init(dc, prefs);
NS_IF_RELEASE(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 = nsRepository::CreateInstance(kViewManagerCID, nsnull, kIViewManagerIID,
(void**) &vm);
if ((NS_OK != rv) || (NS_OK != vm->Init(dc))) {
NS_ASSERTION(NS_OK == rv, "failed to create view manager");
}
NS_RELEASE(dc);
vm->SetViewObserver((nsIViewObserver *)this);
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds;
mPresContext->GetVisibleArea(tbounds);
rv = nsRepository::CreateInstance(kScrollingViewCID, nsnull, kIViewIID,
(void **) &view);
if ((NS_OK != rv) || (NS_OK != view->Init(vm, tbounds, nsnull))) {
NS_ASSERTION(NS_OK == rv, "failed to create 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");
}
rv = view->QueryInterface(kScrollViewIID, (void**)&scrollView);
if (NS_OK == rv) {
scrollView->CreateScrollControls(nativeParentWidget);
scrollView->SetScrollPreference(scrolling);
}
else {
NS_ASSERTION(0, "invalid scrolling view");
}
// 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.
rv = mDocument->CreateShell(cx, vm, mStyleSet, &sh);
NS_ASSERTION(NS_OK == rv, "failed to create presentation shell");
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;
nsIFrame* root2;
GetRootFrame(root1);
sh->GetRootFrame(root2);
CompareTrees(root1, root2);
NS_RELEASE(vm);
NS_RELEASE(cx);
NS_RELEASE(sh);
}
#endif
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