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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):
* Steve Clark <buster@netscape.com>
* Håkan Waara <hwaara@chello.se>
* Dan Rosen <dr@netscape.com>
* Daniel Glazman <glazman@netscape.com>
*
* IBM Corporation
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 05/03/2000 IBM Corp. Observer events for reflow states
*/
#define PL_ARENA_CONST_ALIGN_MASK 3
#include "nsIPresShell.h"
#include "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 "nsIDOMCSSStyleSheet.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsINameSpaceManager.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsIServiceManager.h"
#include "nsFrame.h"
#include "nsHTMLReflowCommand.h"
#include "nsIViewManager.h"
#include "nsCRT.h"
#include "prlog.h"
#include "prmem.h"
#include "prinrval.h"
#include "nsVoidArray.h"
#include "nsHashtable.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsIViewObserver.h"
#include "nsContainerFrame.h"
#include "nsIDeviceContext.h"
#include "nsIEventStateManager.h"
#include "nsIDOMEvent.h"
#include "nsGUIEvent.h"
#include "nsHTMLParts.h"
#include "nsISelection.h"
#include "nsISelectionController.h"
#include "nsReflowPath.h"
#include "nsLayoutCID.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCSSPseudoElements.h"
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsWeakReference.h"
#include "nsIPageSequenceFrame.h"
#include "nsICaret.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIXMLDocument.h"
#include "nsIDOMXMLDocument.h"
#include "nsIScrollableView.h"
#include "nsIParser.h"
#include "nsParserCIID.h"
#include "nsIFrameSelection.h"
#include "nsIDOMNSHTMLInputElement.h" //optimization for ::DoXXX commands
#include "nsIDOMNSHTMLTextAreaElement.h"
#include "nsViewsCID.h"
#include "nsIFrameManager.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsILayoutHistoryState.h"
#include "nsIScrollPositionListener.h"
#include "nsICompositeListener.h"
#include "nsILineIterator.h" // for ScrollFrameIntoView
#include "nsTimer.h"
#include "nsWeakPtr.h"
#include "plarena.h"
#include "nsIObserverService.h" // for reflow observation
#include "nsIDocShell.h" // for reflow observation
#include "nsIDOMRange.h"
#include "nsLayoutErrors.h"
#include "nsLayoutUtils.h"
#include "nsCSSRendering.h"
#ifdef MOZ_PERF_METRICS
#include "nsITimeRecorder.h"
#endif
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
// for |#ifdef DEBUG| code
#include "nsSpaceManager.h"
#include "prenv.h"
#ifdef MOZ_REFLOW_PERF_DSP
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#endif
#include "nsIReflowCallback.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDOMWindowInternal.h"
#include "nsPIDOMWindow.h"
#include "nsIFocusController.h"
#include "nsIPrintPreviewContext.h"
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsIClipboardHelper.h"
#include "nsIDocShellTreeItem.h"
#include "nsIURI.h"
#include "nsIEventQueue.h"
#include "nsIEventQueueService.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
#include "nsIDragService.h"
#include "nsCopySupport.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsITimer.h"
#include "nsITimerInternal.h"
// For style data reconstruction
#include "nsStyleChangeList.h"
#include "nsIStyleFrameConstruction.h"
#include "nsIBindingManager.h"
#include "nsIMenuFrame.h"
#include "nsITreeBoxObject.h"
#include "nsIXBLBinding.h"
#include "nsPlaceholderFrame.h"
// Dummy layout request
#include "nsDummyLayoutRequest.h"
// Content viewer interfaces
#include "nsIContentViewer.h"
#include "nsIDocumentViewer.h"
#ifdef IBMBIDI
#include "nsIBidiKeyboard.h"
#endif // IBMBIDI
#include "nsContentCID.h"
static NS_DEFINE_CID(kCSSStyleSheetCID, NS_CSS_STYLESHEET_CID);
static NS_DEFINE_CID(kStyleSetCID, NS_STYLESET_CID);
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
static NS_DEFINE_CID(kPrintPreviewContextCID, NS_PRINT_PREVIEW_CONTEXT_CID);
// convert a color value to a string, in the CSS format #RRGGBB
// * - initially created for bugs 31816, 20760, 22963
static void ColorToString(nscolor aColor, nsAutoString &aString);
// local management of the style watch:
// aCtlValue should be set to all actions desired (bitwise OR'd together)
// aStyleSet cannot be null
// NOTE: implementation is noop unless MOZ_PERF_METRICS is defined
static nsresult CtlStyleWatch(PRUint32 aCtlValue, nsIStyleSet *aStyleSet);
#define kStyleWatchEnable 1
#define kStyleWatchDisable 2
#define kStyleWatchPrint 4
#define kStyleWatchStart 8
#define kStyleWatchStop 16
#define kStyleWatchReset 32
// Class ID's
static NS_DEFINE_CID(kFrameSelectionCID, NS_FRAMESELECTION_CID);
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_CID(kViewCID, NS_VIEW_CID);
#undef NOISY
// ----------------------------------------------------------------------
#ifdef NS_DEBUG
// Set the environment variable GECKO_VERIFY_REFLOW_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static PRUint32 gVerifyReflowFlags;
struct VerifyReflowFlags {
char* name;
PRUint32 bit;
};
static VerifyReflowFlags gFlags[] = {
{ "verify", VERIFY_REFLOW_ON },
{ "reflow", VERIFY_REFLOW_NOISY },
{ "all", VERIFY_REFLOW_ALL },
{ "list-commands", VERIFY_REFLOW_DUMP_COMMANDS },
{ "noisy-commands", VERIFY_REFLOW_NOISY_RC },
{ "really-noisy-commands", VERIFY_REFLOW_REALLY_NOISY_RC },
{ "space-manager", VERIFY_REFLOW_INCLUDE_SPACE_MANAGER },
{ "resize", VERIFY_REFLOW_DURING_RESIZE_REFLOW },
};
#define NUM_VERIFY_REFLOW_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowVerifyReflowFlags()
{
printf("Here are the available GECKO_VERIFY_REFLOW_FLAGS:\n");
VerifyReflowFlags* flag = gFlags;
VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
printf(" %s\n", flag->name);
++flag;
}
printf("Note: GECKO_VERIFY_REFLOW_FLAGS is a comma separated list of flag\n");
printf("names (no whitespace)\n");
}
#endif
//========================================================================
//========================================================================
//========================================================================
#ifdef MOZ_REFLOW_PERF
class ReflowCountMgr;
static const char * kGrandTotalsStr = "Grand Totals";
#define NUM_REFLOW_TYPES 5
// Counting Class
class ReflowCounter {
public:
ReflowCounter(ReflowCountMgr * aMgr = nsnull);
~ReflowCounter();
void ClearTotals();
void DisplayTotals(const char * aStr);
void DisplayDiffTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void Add(nsReflowReason aType) { mTotals[aType]++; }
void Add(nsReflowReason aType, PRUint32 aTotal) { mTotals[aType] += aTotal; }
void CalcDiffInTotals();
void SetTotalsCache();
void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; }
PRUint32 GetTotalByType(nsReflowReason aType) { if (aType >= eReflowReason_Initial && aType <= eReflowReason_Dirty) return mTotals[aType]; else return 0; }
protected:
void DisplayTotals(PRUint32 * aArray, const char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle);
PRUint32 mTotals[NUM_REFLOW_TYPES];
PRUint32 mCacheTotals[NUM_REFLOW_TYPES];
ReflowCountMgr * mMgr; // weak reference (don't delete)
};
// Counting Class
class IndiReflowCounter {
public:
IndiReflowCounter(ReflowCountMgr * aMgr = nsnull)
: mFrame(nsnull),
mCount(0),
mMgr(aMgr),
mCounter(aMgr),
mHasBeenOutput(PR_FALSE)
{}
virtual ~IndiReflowCounter() {}
nsAutoString mName;
nsIFrame * mFrame; // weak reference (don't delete)
PRInt32 mCount;
ReflowCountMgr * mMgr; // weak reference (don't delete)
ReflowCounter mCounter;
PRBool mHasBeenOutput;
};
//--------------------
// Manager Class
//--------------------
class ReflowCountMgr {
public:
ReflowCountMgr();
virtual ~ReflowCountMgr();
void ClearTotals();
void ClearGrandTotals();
void DisplayTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void DisplayDiffsInTotals(const char * aStr);
void Add(const char * aName, nsReflowReason aType, nsIFrame * aFrame);
ReflowCounter * LookUp(const char * aName);
void PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsIPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
FILE * GetOutFile() { return mFD; }
PLHashTable * GetIndiFrameHT() { return mIndiFrameCounts; }
void SetPresContext(nsIPresContext * aPresContext) { mPresContext = aPresContext; } // weak reference
void SetPresShell(nsIPresShell* aPresShell) { mPresShell= aPresShell; } // weak reference
void SetDumpFrameCounts(PRBool aVal) { mDumpFrameCounts = aVal; }
void SetDumpFrameByFrameCounts(PRBool aVal) { mDumpFrameByFrameCounts = aVal; }
void SetPaintFrameCounts(PRBool aVal) { mPaintFrameByFrameCounts = aVal; }
protected:
void DisplayTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
PR_STATIC_CALLBACK(PRIntn) RemoveItems(PLHashEntry *he, PRIntn i, void *arg);
PR_STATIC_CALLBACK(PRIntn) RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg);
void CleanUp();
// stdout Output Methods
PR_STATIC_CALLBACK(PRIntn) DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg);
PR_STATIC_CALLBACK(PRIntn) DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandTotals();
void DoIndiTotalsTree();
// HTML Output Methods
PR_STATIC_CALLBACK(PRIntn) DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandHTMLTotals();
// Zero Out the Totals
PR_STATIC_CALLBACK(PRIntn) DoClearTotals(PLHashEntry *he, PRIntn i, void *arg);
// Displays the Diff Totals
PR_STATIC_CALLBACK(PRIntn) DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg);
PLHashTable * mCounts;
PLHashTable * mIndiFrameCounts;
FILE * mFD;
PRBool mDumpFrameCounts;
PRBool mDumpFrameByFrameCounts;
PRBool mPaintFrameByFrameCounts;
PRBool mCycledOnce;
// Root Frame for Individual Tracking
nsIPresContext * mPresContext;
nsIPresShell* mPresShell;
// ReflowCountMgr gReflowCountMgr;
};
#endif
//========================================================================
// comment out to hide caret
#define SHOW_CARET
// The upper bound on the amount of time to spend reflowing, in
// microseconds. When this bound is exceeded and reflow commands are
// still queued up, a reflow event is posted. The idea is for reflow
// to not hog the processor beyond the time specifed in
// gMaxRCProcessingTime. This data member is initialized from the
// layout.reflow.timeslice pref.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
// Set to true to enable async reflow during document load.
// This flag is initialized from the layout.reflow.async.duringDocLoad pref.
static PRBool gAsyncReflowDuringDocLoad = PR_FALSE;
// Largest chunk size we recycle
static const size_t gMaxRecycledSize = 400;
#define MARK_INCREMENT 50
#define BLOCK_INCREMENT 4044 /* a bit under 4096, for malloc overhead */
/**A block of memory that the stack will
* chop up and hand out
*/
struct StackBlock {
// a block of memory. Note that this must be first so that it will
// be aligned.
char mBlock[BLOCK_INCREMENT];
// another block of memory that would only be created
// if our stack overflowed. Yes we have the ability
// to grow on a stack overflow
StackBlock* mNext;
StackBlock() : mNext(nsnull) { }
~StackBlock() { }
};
/* we hold an array of marks. A push pushes a mark on the stack
* a pop pops it off.
*/
struct StackMark {
// the block of memory we are currently handing out chunks of
StackBlock* mBlock;
// our current position in the memory
size_t mPos;
};
/* A stack arena allows a stack based interface to a block of memory.
* It should be used when you need to allocate some temporary memory that
* you will immediately return.
*/
class StackArena {
public:
StackArena();
~StackArena();
// Memory management functions
nsresult Allocate(size_t aSize, void** aResult);
nsresult Push();
nsresult Pop();
private:
// our current position in memory
size_t mPos;
// a list of memory block. Usually there is only one
// but if we overrun our stack size we can get more memory.
StackBlock* mBlocks;
// the current block of memory we are passing our chucks of
StackBlock* mCurBlock;
// our stack of mark where push has been called
StackMark* mMarks;
// the current top of the the mark list
PRUint32 mStackTop;
// the size of the mark array
PRUint32 mMarkLength;
};
StackArena::StackArena()
{
// allocate the marks array
mMarkLength = MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
// allocate our stack memory
mBlocks = new StackBlock();
mCurBlock = mBlocks;
mStackTop = 0;
mPos = 0;
}
StackArena::~StackArena()
{
// free up our data
delete[] mMarks;
while(mBlocks)
{
StackBlock* toDelete = mBlocks;
mBlocks = mBlocks->mNext;
delete toDelete;
}
}
nsresult
StackArena::Push()
{
// if the we overrun our mark array. Resize it.
if (mStackTop + 1 >= mMarkLength)
{
StackMark* oldMarks = mMarks;
PRUint32 oldLength = mMarkLength;
mMarkLength += MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
memcpy(mMarks, oldMarks, sizeof(StackMark)*oldLength);
delete[] oldMarks;
}
// set a mark at the top
mMarks[mStackTop].mBlock = mCurBlock;
mMarks[mStackTop].mPos = mPos;
mStackTop++;
return NS_OK;
}
nsresult
StackArena::Allocate(size_t aSize, void** aResult)
{
NS_ASSERTION(mStackTop > 0, "Error allocate called before push!!!");
// make sure we are aligned. Beard said 8 was safer then 4.
// Round size to multiple of 8
aSize = PR_ROUNDUP(aSize, 8);
// if the size makes the stack overflow. Grab another block for the stack
if (mPos + aSize >= BLOCK_INCREMENT)
{
NS_ASSERTION(aSize <= BLOCK_INCREMENT,"Requested memory is greater that our block size!!");
if (mCurBlock->mNext == nsnull)
mCurBlock->mNext = new StackBlock();
mCurBlock = mCurBlock->mNext;
mPos = 0;
}
// return the chunk they need.
*aResult = mCurBlock->mBlock + mPos;
mPos += aSize;
return NS_OK;
}
nsresult
StackArena::Pop()
{
// pop off the mark
NS_ASSERTION(mStackTop > 0, "Error Pop called 1 too many times");
mStackTop--;
#ifdef DEBUG
// Mark the "freed" memory with 0xdd to help with debugging of memory
// allocation problems.
{
StackBlock *block = mMarks[mStackTop].mBlock, *block_end = mCurBlock;
size_t pos = mMarks[mStackTop].mPos;
for (; block != block_end; block = block->mNext, pos = 0) {
memset(block->mBlock + pos, 0xdd, sizeof(block->mBlock) - pos);
}
memset(block->mBlock + pos, 0xdd, mPos - pos);
}
#endif
mCurBlock = mMarks[mStackTop].mBlock;
mPos = mMarks[mStackTop].mPos;
return NS_OK;
}
// Uncomment this to disable the frame arena.
//#define DEBUG_TRACEMALLOC_FRAMEARENA 1
// Memory is allocated 4-byte aligned. We have recyclers for chunks up to
// 200 bytes
class FrameArena {
public:
FrameArena(PRUint32 aArenaSize = 4096);
~FrameArena();
// Memory management functions
nsresult AllocateFrame(size_t aSize, void** aResult);
nsresult FreeFrame(size_t aSize, void* aPtr);
private:
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// 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];
#endif
};
FrameArena::FrameArena(PRUint32 aArenaSize)
{
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Initialize the arena pool
PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize);
// Zero out the recyclers array
memset(mRecyclers, 0, sizeof(mRecyclers));
#endif
}
FrameArena::~FrameArena()
{
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Free the arena in the pool and finish using it
PL_FinishArenaPool(&mPool);
#endif
}
nsresult
FrameArena::AllocateFrame(size_t aSize, void** aResult)
{
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
*aResult = PR_Malloc(aSize);
#else
void* result = nsnull;
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// 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;
#endif
return NS_OK;
}
nsresult
FrameArena::FreeFrame(size_t aSize, void* aPtr)
{
#ifdef DEBUG
// Mark the memory with 0xdd in DEBUG builds so that there will be
// problems if someone tries to access memory that they've freed.
memset(aPtr, 0xdd, aSize);
#endif
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
PR_Free(aPtr);
#else
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// 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;
}
#endif
return NS_OK;
}
class PresShellViewEventListener : public nsIScrollPositionListener,
public nsICompositeListener
{
public:
PresShellViewEventListener();
virtual ~PresShellViewEventListener();
NS_DECL_ISUPPORTS
// nsIScrollPositionListener methods
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
// nsICompositeListener methods
NS_IMETHOD WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD WillRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
nsresult SetPresShell(nsIPresShell *aPresShell);
private:
nsresult HideCaret();
nsresult RestoreCaretVisibility();
nsIPresShell *mPresShell;
PRBool mWasVisible;
PRInt32 mCallCount;
};
struct nsDOMEventRequest
{
nsIContent* content;
nsEvent* event;
nsDOMEventRequest* next;
};
struct nsAttributeChangeRequest
{
nsIContent* content;
PRInt32 nameSpaceID;
nsIAtom* name;
nsAutoString value;
PRBool notify;
nsAttributeChangeType type;
nsAttributeChangeRequest* next;
};
struct nsCallbackEventRequest
{
nsIReflowCallback* callback;
nsCallbackEventRequest* next;
};
PRInt32 nsDummyLayoutRequest::gRefCnt;
nsIURI* nsDummyLayoutRequest::gURI;
NS_IMPL_ADDREF(nsDummyLayoutRequest);
NS_IMPL_RELEASE(nsDummyLayoutRequest);
NS_IMPL_QUERY_INTERFACE2(nsDummyLayoutRequest, nsIRequest, nsIChannel);
nsresult
nsDummyLayoutRequest::Create(nsIRequest** aResult, nsIPresShell* aPresShell)
{
nsDummyLayoutRequest* request = new nsDummyLayoutRequest(aPresShell);
if (!request)
return NS_ERROR_OUT_OF_MEMORY;
return request->QueryInterface(NS_GET_IID(nsIRequest), (void**) aResult);
}
nsDummyLayoutRequest::nsDummyLayoutRequest(nsIPresShell* aPresShell)
{
if (gRefCnt++ == 0) {
nsresult rv;
rv = NS_NewURI(&gURI, "about:layout-dummy-request", nsnull);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create about:layout-dummy-request");
}
mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell));
}
nsDummyLayoutRequest::~nsDummyLayoutRequest()
{
if (--gRefCnt == 0) {
NS_IF_RELEASE(gURI);
}
}
NS_IMETHODIMP
nsDummyLayoutRequest::Cancel(nsresult status)
{
// Cancel layout
nsresult rv = NS_OK;
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
rv = presShell->CancelAllReflowCommands();
}
return rv;
}
// ----------------------------------------------------------------------------
/**
* Used to build and maintain the incremental reflow tree, and
* dispatch incremental reflows to individual reflow roots.
*/
class IncrementalReflow
{
public:
~IncrementalReflow();
/**
* Add a reflow command to the set of commands that are to be
* dispatched in the incremental reflow. Returns `true' if
* successful, `false' if the command could not be added (and thus,
* should be re-scheduled).
*/
PRBool
AddCommand(nsIPresContext *aPresContext,
nsHTMLReflowCommand *aCommand);
/**
* Dispatch the incremental reflow.
*/
void
Dispatch(nsIPresContext *aPresContext,
nsHTMLReflowMetrics &aDesiredSize,
const nsSize &aMaxSize,
nsIRenderingContext &aRendContext);
#ifdef NS_DEBUG
/**
* Dump the incremental reflow state.
*/
void
Dump(nsIPresContext *aPresContext) const;
#endif
protected:
/**
* The set of incremental reflow roots.
*/
nsAutoVoidArray mRoots;
};
IncrementalReflow::~IncrementalReflow()
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i)
delete NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
}
void
IncrementalReflow::Dispatch(nsIPresContext *aPresContext,
nsHTMLReflowMetrics &aDesiredSize,
const nsSize &aMaxSize,
nsIRenderingContext &aRendContext)
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i) {
// Send an incremental reflow notification to the first frame in the
// path.
nsReflowPath *path = NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
nsIFrame *first = path->mFrame;
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIFrame* root;
shell->GetRootFrame(&root);
first->WillReflow(aPresContext);
nsContainerFrame::PositionFrameView(aPresContext, first);
// If the first frame in the path is the root of the frame
// hierarchy, then use all the available space. If it's simply a
// `reflow root', then use the first frame's size as the available
// space.
nsSize size;
if (first == root)
size = aMaxSize;
else
first->GetSize(size);
nsHTMLReflowState reflowState(aPresContext, first, path,
&aRendContext, size);
nsReflowStatus status;
first->Reflow(aPresContext, aDesiredSize, reflowState, status);
// If an incremental reflow is initiated at a frame other than the
// root frame, then its desired size had better not change!
NS_ASSERTION(first == root ||
(aDesiredSize.width == size.width && aDesiredSize.height == size.height),
"non-root frame's desired size changed during an incremental reflow");
first->SizeTo(aPresContext, aDesiredSize.width, aDesiredSize.height);
nsIView* view;
first->GetView(aPresContext, &view);
if (view)
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, first, view, nsnull);
first->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
}
}
PRBool
IncrementalReflow::AddCommand(nsIPresContext *aPresContext,
nsHTMLReflowCommand *aCommand)
{
nsIFrame *frame;
aCommand->GetTarget(frame);
NS_ASSERTION(frame != nsnull, "reflow command with no target");
// Construct the reflow path by walking up the through the frames'
// parent chain until we reach either a `reflow root' or the root
// frame in the frame hierarchy.
nsAutoVoidArray path;
nsFrameState state;
do {
path.AppendElement(frame);
frame->GetFrameState(&state);
} while (!(state & NS_FRAME_REFLOW_ROOT) &&
(frame->GetParent(&frame), frame != nsnull));
// Pop off the root, add it to the set if it's not there already.
PRInt32 lastIndex = path.Count() - 1;
nsIFrame *rootFrame = NS_STATIC_CAST(nsIFrame *, path[lastIndex]);
path.RemoveElementAt(lastIndex);
nsReflowPath *root = nsnull;
PRInt32 i;
for (i = mRoots.Count() - 1; i >= 0; --i) {
nsReflowPath *path = NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
if (path->mFrame == rootFrame) {
root = path;
break;
}
}
if (! root) {
root = new nsReflowPath(rootFrame);
if (! root)
return NS_ERROR_OUT_OF_MEMORY;
root->mReflowCommand = nsnull;
mRoots.AppendElement(root);
}
// Now walk the path from the root to the leaf, adding to the reflow
// tree as necessary.
nsReflowPath *target = root;
for (i = path.Count() - 1; i >= 0; --i) {
nsIFrame *frame = NS_STATIC_CAST(nsIFrame *, path[i]);
target = target->EnsureSubtreeFor(frame);
// Out of memory. Ugh.
if (! target)
return PR_FALSE;
}
// Place the reflow command in the leaf, if one isn't there already.
if (target->mReflowCommand) {
// XXXwaterson it's probably possible to have some notion of
// `promotion' here that would avoid any re-queuing; for example,
// promote a dirty reflow to a style changed. For now, let's punt
// and not worry about it.
#ifdef NS_DEBUG
if (gVerifyReflowFlags & VERIFY_REFLOW_NOISY_RC)
printf("requeuing command %p because %p was already scheduled "
"for the same frame",
(void*)aCommand, (void*)target->mReflowCommand);
#endif
return PR_FALSE;
}
target->mReflowCommand = aCommand;
return PR_TRUE;
}
#ifdef NS_DEBUG
void
IncrementalReflow::Dump(nsIPresContext *aPresContext) const
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i)
NS_STATIC_CAST(nsReflowPath *, mRoots[i])->Dump(aPresContext, stdout, 0);
}
#endif
// ----------------------------------------------------------------------------
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,
nsCompatibility aCompatMode);
NS_IMETHOD Destroy();
NS_IMETHOD AllocateFrame(size_t aSize, void** aResult);
NS_IMETHOD FreeFrame(size_t aSize, void* aFreeChunk);
// Dynamic stack memory allocation
NS_IMETHOD PushStackMemory();
NS_IMETHOD PopStackMemory();
NS_IMETHOD AllocateStackMemory(size_t aSize, void** aResult);
NS_IMETHOD GetDocument(nsIDocument** aResult);
NS_IMETHOD GetPresContext(nsIPresContext** aResult);
NS_IMETHOD GetViewManager(nsIViewManager** aResult);
NS_IMETHOD GetStyleSet(nsIStyleSet** aResult);
NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle);
NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle);
NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList);
NS_IMETHOD ReconstructStyleData(PRBool aRebuildRuleTree);
NS_IMETHOD SetPreferenceStyleRules(PRBool aForceReflow);
NS_IMETHOD EnablePrefStyleRules(PRBool aEnable, PRUint8 aPrefType=0xFF);
NS_IMETHOD ArePrefStyleRulesEnabled(PRBool& aEnabled);
NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection);
NS_IMETHOD SetDisplaySelection(PRInt16 aToggle);
NS_IMETHOD GetDisplaySelection(PRInt16 *aToggle);
NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous);
NS_IMETHOD RepaintSelection(SelectionType aType);
NS_IMETHOD GetFrameSelection(nsIFrameSelection** aSelection);
NS_IMETHOD BeginObservingDocument();
NS_IMETHOD EndObservingDocument();
NS_IMETHOD GetDidInitialReflow(PRBool *aDidInitialReflow);
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(nsHTMLReflowCommand* aReflowCommand);
NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame,
nsReflowType* aCmdType);
NS_IMETHOD CancelReflowCommandInternal(nsIFrame* aTargetFrame,
nsReflowType* aCmdType,
PRBool aProcessDummyLayoutRequest = PR_TRUE);
NS_IMETHOD CancelAllReflowCommands();
NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush);
NS_IMETHOD FlushPendingNotifications(PRBool aUpdateViews);
/**
* Recreates the frames for a node
*/
NS_IMETHOD RecreateFramesFor(nsIContent* aContent);
/**
* Post a request to handle a DOM event after Reflow has finished.
*/
NS_IMETHOD PostDOMEvent(nsIContent* aContent, nsEvent* aEvent);
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHOD PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType);
/**
* Post a callback that should be handled after reflow has finished.
*/
NS_IMETHOD PostReflowCallback(nsIReflowCallback* aCallback);
NS_IMETHOD CancelReflowCallback(nsIReflowCallback* aCallback);
/**
* Reflow batching
*/
NS_IMETHOD BeginReflowBatching();
NS_IMETHOD EndReflowBatching(PRBool aFlushPendingReflows);
NS_IMETHOD GetReflowBatchingStatus(PRBool* aBatch);
NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aContext);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
NS_IMETHOD GoToAnchor(const nsAString& aAnchorName, PRBool aScroll);
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const;
NS_IMETHOD SetIgnoreFrameDestruction(PRBool aIgnore);
NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame);
NS_IMETHOD GetFrameManager(nsIFrameManager** aFrameManager) const;
NS_IMETHOD DoCopy();
NS_IMETHOD GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString);
NS_IMETHOD GetImageLocation(nsIDOMNode* aNode, nsAString& aLocationString);
NS_IMETHOD DoCopyImageContents(nsIDOMNode* aNode);
NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, PRBool aLeavingPage);
NS_IMETHOD GetHistoryState(nsILayoutHistoryState** aLayoutHistoryState);
NS_IMETHOD SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState);
NS_IMETHOD GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const;
NS_IMETHOD SetAnonymousContentFor(nsIContent* aContent, nsISupportsArray* aAnonymousElements);
NS_IMETHOD GetAnonymousContentFor(nsIContent* aContent, nsISupportsArray** aAnonymousElements);
NS_IMETHOD ReleaseAnonymousContent();
NS_IMETHOD IsPaintingSuppressed(PRBool* aResult);
NS_IMETHOD UnsuppressPainting();
NS_IMETHOD DisableThemeSupport();
virtual PRBool IsThemeSupportEnabled();
NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus);
NS_IMETHOD GetEventTargetFrame(nsIFrame** aFrame);
NS_IMETHOD IsReflowLocked(PRBool* aIsLocked);
#ifdef IBMBIDI
NS_IMETHOD SetCaretBidiLevel(PRUint8 aLevel);
NS_IMETHOD GetCaretBidiLevel(PRUint8 *aOutLevel);
NS_IMETHOD UndefineCaretBidiLevel();
NS_IMETHOD BidiStyleChangeReflow();
#endif
//nsIViewObserver interface
NS_IMETHOD Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD HandleEvent(nsIView* aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled);
NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsEvent* aEvent,
nsEventStatus* aStatus);
NS_IMETHOD Scrolled(nsIView *aView);
NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight);
//nsIFocusTracker interface
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame);
// caret handling
NS_IMETHOD GetCaret(nsICaret **aOutCaret);
NS_IMETHOD SetCaretEnabled(PRBool aInEnable);
NS_IMETHOD SetCaretWidth(PRInt16 twips);
NS_IMETHOD SetCaretReadOnly(PRBool aReadOnly);
NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled);
NS_IMETHOD SetSelectionFlags(PRInt16 aInEnable);
NS_IMETHOD GetSelectionFlags(PRInt16 *aOutEnable);
// nsISelectionController
NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD LineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD IntraLineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD PageMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD ScrollPage(PRBool aForward);
NS_IMETHOD ScrollLine(PRBool aForward);
NS_IMETHOD ScrollHorizontal(PRBool aLeft);
NS_IMETHOD CompleteScroll(PRBool aForward);
NS_IMETHOD CompleteMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD SelectAll();
NS_IMETHOD CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval);
// nsIDocumentObserver
NS_DECL_NSIDOCUMENTOBSERVER
#ifdef MOZ_REFLOW_PERF
NS_IMETHOD DumpReflows();
NS_IMETHOD CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame);
NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsIPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
NS_IMETHOD SetPaintFrameCount(PRBool aOn);
#endif
#ifdef PR_LOGGING
static PRLogModuleInfo* gLog;
#endif
protected:
virtual ~PresShell();
void HandlePostedDOMEvents();
void HandlePostedAttributeChanges();
void HandlePostedReflowCallbacks();
void UnsuppressAndInvalidate();
/** notify all external reflow observers that reflow of type "aData" is about
* to begin.
*/
nsresult NotifyReflowObservers(const char *aData);
nsresult ReflowCommandAdded(nsHTMLReflowCommand* aRC);
nsresult ReflowCommandRemoved(nsHTMLReflowCommand* aRC);
// This method should be called after a reflow commands have been
// removed from the queue, but after the state in the presshell is
// such that it's safe to flush (i.e. mIsReflowing == PR_FALSE)
// If we are not reflowing and ther are no load-crated reflow commands, then
// the dummyLayoutRequest is removed
void DoneRemovingReflowCommands();
nsresult AddDummyLayoutRequest(void);
nsresult RemoveDummyLayoutRequest(void);
nsresult ReconstructFrames(void);
nsresult CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult);
nsresult WillCauseReflow();
nsresult DidCauseReflow();
nsresult ProcessReflowCommands(PRBool aInterruptible);
nsresult ClearReflowEventStatus();
void PostReflowEvent();
PRBool AlreadyInQueue(nsHTMLReflowCommand* aReflowCommand,
nsVoidArray& aQueue);
friend struct ReflowEvent;
// utility to determine if we're in the middle of a drag
PRBool IsDragInProgress ( ) const ;
PRBool mCaretEnabled;
#ifdef IBMBIDI
PRUint8 mBidiLevel; // The Bidi level of the cursor
nsCOMPtr<nsIBidiKeyboard> mBidiKeyboard;
#endif // IBMBIDI
#ifdef NS_DEBUG
PRBool VerifyIncrementalReflow();
PRBool mInVerifyReflow;
#endif
/**
* methods that manage rules that are used to implement the associated preferences
* - initially created for bugs 31816, 20760, 22963
*/
nsresult ClearPreferenceStyleRules(void);
nsresult CreatePreferenceStyleSheet(void);
nsresult SetPrefColorRules(void);
nsresult SetPrefLinkRules(void);
nsresult SetPrefFocusRules(void);
nsresult SelectRange(nsIDOMRange *aRange);
// 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;
nsICSSStyleSheet* mPrefStyleSheet; // mStyleSet owns it but we maintaina ref, may be null
nsIViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to
nsWeakPtr mHistoryState; // [WEAK] session history owns this
PRUint32 mUpdateCount;
// normal reflow commands
nsVoidArray mReflowCommands;
PRPackedBool mEnablePrefStyleSheet;
PRPackedBool mDocumentLoading;
PRPackedBool mIsReflowing;
PRPackedBool mIsDestroying;
PRPackedBool mDidInitialReflow;
PRPackedBool mIgnoreFrameDestruction;
nsIFrame* mCurrentEventFrame;
nsIContent* mCurrentEventContent;
nsVoidArray mCurrentEventFrameStack;
nsVoidArray mCurrentEventContentStack;
nsSupportsHashtable* mAnonymousContentTable;
#ifdef NS_DEBUG
nsRect mCurrentTargetRect;
nsIView* mCurrentTargetView;
#endif
nsCOMPtr<nsIFrameSelection> mSelection;
nsCOMPtr<nsICaret> mCaret;
PRInt16 mSelectionFlags;
PRPackedBool mScrollingEnabled; //used to disable programmable scrolling from outside
PRPackedBool mBatchReflows; // When set to true, the pres shell batches reflow commands.
nsIFrameManager* mFrameManager; // we hold a reference
PresShellViewEventListener *mViewEventListener;
nsCOMPtr<nsIEventQueueService> mEventQueueService;
nsCOMPtr<nsIEventQueue> mReflowEventQueue;
FrameArena mFrameArena;
StackArena* mStackArena;
nsCOMPtr<nsIObserverService> mObserverService; // Observer service for reflow events
nsCOMPtr<nsIDragService> mDragService;
PRInt32 mRCCreatedDuringLoad; // Counter to keep track of reflow commands created during doc
nsCOMPtr<nsIRequest> mDummyLayoutRequest;
// used for list of posted events and attribute changes. To be done
// after reflow.
nsDOMEventRequest* mFirstDOMEventRequest;
nsDOMEventRequest* mLastDOMEventRequest;
nsAttributeChangeRequest* mFirstAttributeRequest;
nsAttributeChangeRequest* mLastAttributeRequest;
nsCallbackEventRequest* mFirstCallbackEventRequest;
nsCallbackEventRequest* mLastCallbackEventRequest;
PRPackedBool mIsThemeSupportDisabled; // Whether or not form controls should use nsITheme in this shell.
PRPackedBool mIsDocumentGone; // We've been disconnected from the document.
PRPackedBool mPaintingSuppressed; // For all documents we initially lock down painting.
// We will refuse to paint the document until either
// (a) our timer fires or (b) all frames are constructed.
PRPackedBool mShouldUnsuppressPainting; // Indicates that it is safe to unlock painting once all pending
// reflows have been processed.
nsCOMPtr<nsITimer> mPaintSuppressionTimer; // This timer controls painting suppression. Until it fires
// or all frames are constructed, we won't paint anything but
// our <body> background and scrollbars.
#define PAINTLOCK_EVENT_DELAY 250 // 250ms. This is actually
// pref-controlled, but we use this
// value if we fail to get the pref
// for any reason.
static void sPaintSuppressionCallback(nsITimer* aTimer, void* aPresShell); // A callback for the timer.
MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow
MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation
#ifdef MOZ_REFLOW_PERF
ReflowCountMgr * mReflowCountMgr;
#endif
private:
PRBool InZombieDocument(nsIContent *aContent);
nsresult RetargetEventToParent(nsIView *aView, nsGUIEvent* aEvent,
nsEventStatus* aEventStatus, PRBool aForceHandle,
PRBool& aHandled, nsIContent *aZombieFocusedContent);
void FreeDynamicStack();
//helper funcs for disabing autoscrolling
void DisableScrolling(){mScrollingEnabled = PR_FALSE;}
void EnableScrolling(){mScrollingEnabled = PR_TRUE;}
PRBool IsScrollingEnabled(){return mScrollingEnabled;}
//helper funcs for event handling
nsIFrame* GetCurrentEventFrame();
void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent);
void PopCurrentEventInfo();
nsresult HandleEventInternal(nsEvent* aEvent, nsIView* aView, PRUint32 aFlags, nsEventStatus *aStatus);
//help funcs for resize events
void CreateResizeEventTimer();
void KillResizeEventTimer();
void FireResizeEvent();
static void sResizeEventCallback(nsITimer* aTimer, void* aPresShell) ;
nsCOMPtr<nsITimer> mResizeEventTimer;
};
#ifdef PR_LOGGING
PRLogModuleInfo* PresShell::gLog;
#endif
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsIPresContext* aPresContext, nsIFrameManager* aFrameManager)
{
if (aFrameManager && nsIFrameDebug::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame;
aFrameManager->GetRootFrame(&rootFrame);
aFrameManager->DebugVerifyStyleTree(aPresContext, rootFrame);
}
}
#define VERIFY_STYLE_TREE VerifyStyleTree(mPresContext, mFrameManager)
#else
#define VERIFY_STYLE_TREE
#endif
static PRBool gVerifyReflowEnabled;
PRBool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_VERIFY_REFLOW_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* comma = PL_strchr(flags, ',');
if (comma)
*comma = '\0';
PRBool found = PR_FALSE;
VerifyReflowFlags* flag = gFlags;
VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
if (PL_strcasecmp(flag->name, flags) == 0) {
gVerifyReflowFlags |= flag->bit;
found = PR_TRUE;
break;
}
++flag;
}
if (! found)
error = PR_TRUE;
if (! comma)
break;
*comma = ',';
flags = comma + 1;
}
if (error)
ShowVerifyReflowFlags();
}
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;
}
void
nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled)
{
gVerifyReflowEnabled = aEnabled;
}
PRInt32
nsIPresShell::GetVerifyReflowFlags()
{
#ifdef NS_DEBUG
return gVerifyReflowFlags;
#else
return 0;
#endif
}
//----------------------------------------------------------------------
nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
PresShell* it = new PresShell();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIPresShell),
(void **) aInstancePtrResult);
}
PresShell::PresShell():
#ifdef IBMBIDI
mBidiLevel(BIDI_LEVEL_UNDEFINED),
#endif
mEnablePrefStyleSheet(PR_TRUE),
mScrollingEnabled(PR_TRUE)
{
#ifdef MOZ_REFLOW_PERF
mReflowCountMgr = new ReflowCountMgr();
mReflowCountMgr->SetPresContext(mPresContext);
mReflowCountMgr->SetPresShell(this);
#endif
#ifdef IBMBIDI
mBidiLevel = BIDI_LEVEL_UNDEFINED;
#endif
#ifdef PR_LOGGING
if (! gLog)
gLog = PR_NewLogModule("PresShell");
#endif
mSelectionFlags = nsISelectionDisplay::DISPLAY_TEXT | nsISelectionDisplay::DISPLAY_IMAGES;
mIsThemeSupportDisabled = PR_FALSE;
}
NS_IMPL_ADDREF(PresShell)
NS_IMPL_RELEASE(PresShell)
nsresult
PresShell::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (!aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsIPresShell))) {
nsIPresShell* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIDocumentObserver))) {
nsIDocumentObserver* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIViewObserver))) {
nsIViewObserver* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsIFocusTracker))) {
nsIFocusTracker* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISelectionController))) {
nsISelectionController* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISelectionDisplay))) {
nsISelectionController* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISupportsWeakReference))) {
nsISupportsWeakReference* tmp = this;
*aInstancePtr = (void*) tmp;
} else if (aIID.Equals(NS_GET_IID(nsISupports))) {
nsIPresShell* tmp = this;
nsISupports* tmp2 = tmp;
*aInstancePtr = (void*) tmp2;
} else {
*aInstancePtr = nsnull;
return NS_NOINTERFACE;
}
NS_ADDREF_THIS();
return NS_OK;
}
PresShell::~PresShell()
{
if (mStyleSet) {
NS_NOTREACHED("Someone did not call nsIPresShell::destroy");
Destroy();
}
NS_ASSERTION(mCurrentEventContentStack.Count() == 0,
"Huh, event content left on the stack in pres shell dtor!");
NS_IF_RELEASE(mCurrentEventContent);
// if we allocated any stack memory free it.
FreeDynamicStack();
}
/**
* Initialize the presentation shell. Create view manager and style
* manager.
*/
NS_IMETHODIMP
PresShell::Init(nsIDocument* aDocument,
nsIPresContext* aPresContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet,
nsCompatibility aCompatMode)
{
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;
// The document viewer owns both view manager and pres shell.
mViewManager->SetViewObserver(this);
// Bind the context to the presentation shell.
mPresContext = aPresContext;
aPresContext->SetShell(this);
mStyleSet = aStyleSet;
// Set the compatibility mode after attaching the pres context and
// style set, but before creating any frames.
mPresContext->SetCompatibilityMode(aCompatMode);
// setup the preference style rules (no forced reflow), and do it
// before creating any frames.
SetPreferenceStyleRules(PR_FALSE);
mHistoryState = nsnull;
nsresult result = nsComponentManager::CreateInstance(kFrameSelectionCID, nsnull,
NS_GET_IID(nsIFrameSelection),
getter_AddRefs(mSelection));
if (NS_FAILED(result))
return result;
// Create and initialize the frame manager
result = NS_NewFrameManager(&mFrameManager);
if (NS_FAILED(result)) {
return result;
}
result = mFrameManager->Init(this, mStyleSet);
if (NS_FAILED(result)) {
return result;
}
result = mSelection->Init((nsIFocusTracker *) this, nsnull);
if (NS_FAILED(result))
return result;
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
// make the caret
nsresult err = NS_NewCaret(getter_AddRefs(mCaret));
if (NS_SUCCEEDED(err))
{
mCaret->Init(this);
}
//SetCaretEnabled(PR_TRUE); // make it show in browser windows
#endif
//set up selection to be displayed in document
nsCOMPtr<nsISupports> container;
result = aPresContext->GetContainer(getter_AddRefs(container));
if (NS_SUCCEEDED(result) && container) {
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell){
PRInt32 docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)){
if (nsIDocShellTreeItem::typeContent == docShellType){
SetDisplaySelection(nsISelectionController::SELECTION_DISABLED);
}
}
}
}
mEventQueueService = do_GetService(kEventQueueServiceCID, &result);
if (!mEventQueueService) {
NS_WARNING("couldn't get event queue service");
return NS_ERROR_FAILURE;
}
if (gMaxRCProcessingTime == -1) {
// First, set the defaults
gMaxRCProcessingTime = NS_MAX_REFLOW_TIME;
gAsyncReflowDuringDocLoad = PR_TRUE;
// Get the prefs service
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefBranch) {
prefBranch->GetIntPref("layout.reflow.timeslice", &gMaxRCProcessingTime);
prefBranch->GetBoolPref("layout.reflow.async.duringDocLoad",
&gAsyncReflowDuringDocLoad);
}
}
// cache the observation service
mObserverService = do_GetService("@mozilla.org/observer-service;1",
&result);
if (NS_FAILED(result)) {
return result;
}
// cache the drag service so we can check it during reflows
mDragService = do_GetService("@mozilla.org/widget/dragservice;1");
#ifdef IBMBIDI
mBidiKeyboard = do_GetService("@mozilla.org/widget/bidikeyboard;1");
#endif
#ifdef MOZ_REFLOW_PERF
if (mReflowCountMgr) {
// Get the prefs service
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefBranch) {
PRBool paintFrameCounts = PR_FALSE;
PRBool dumpFrameCounts = PR_FALSE;
PRBool dumpFrameByFrameCounts = PR_FALSE;
prefBranch->GetBoolPref("layout.reflow.showframecounts",
&paintFrameCounts);
prefBranch->GetBoolPref("layout.reflow.dumpframecounts",
&dumpFrameCounts);
prefBranch->GetBoolPref("layout.reflow.dumpframebyframecounts",
&dumpFrameByFrameCounts);
mReflowCountMgr->SetDumpFrameCounts(dumpFrameCounts);
mReflowCountMgr->SetDumpFrameByFrameCounts(dumpFrameByFrameCounts);
mReflowCountMgr->SetPaintFrameCounts(paintFrameCounts);
}
}
#endif
return NS_OK;
}
NS_IMETHODIMP
PresShell::Destroy()
{
#ifdef MOZ_REFLOW_PERF
DumpReflows();
if (mReflowCountMgr) {
delete mReflowCountMgr;
mReflowCountMgr = nsnull;
}
#endif
// If our paint suppression timer is still active, kill it.
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
// release our pref style sheet, if we have one still
ClearPreferenceStyleRules();
// free our table of anonymous content
ReleaseAnonymousContent();
mIsDestroying = PR_TRUE;
// Clobber weak leaks in case of re-entrancy during tear down
mHistoryState = nsnull;
// We can't release all the event content in
// mCurrentEventContentStack here since there might be code on the
// stack that will release the event content too. Double release
// bad!
// The frames will be torn down, so remove them from the current
// event frame stack (since they'd be dangling references if we'd
// leave them in) and null out the mCurrentEventFrame pointer as
// well.
mCurrentEventFrame = nsnull;
PRInt32 i, count = mCurrentEventFrameStack.Count();
for (i = 0; i < count; i++) {
mCurrentEventFrameStack.ReplaceElementAt(nsnull, i);
}
if (mViewManager) {
// Disable paints during tear down of the frame tree
mViewManager->DisableRefresh();
// Clear the view manager's weak pointer back to |this| in case it
// was leaked.
mViewManager->SetViewObserver(nsnull);
mViewManager = nsnull;
}
// This shell must be removed from the document before the frame
// hierarchy is torn down to avoid finding deleted frames through
// this presshell while the frames are being torn down
if (mDocument) {
mDocument->DeleteShell(this);
}
// Destroy the frame manager. This will destroy the frame hierarchy
if (mFrameManager) {
mFrameManager->Destroy();
NS_RELEASE(mFrameManager);
}
// Let the style set do its cleanup.
mStyleSet->Shutdown();
mStyleSet = nsnull;
// We hold a reference to the pres context, and it holds a weak link back
// to us. To avoid the pres context having a dangling reference, set its
// pres shell to NULL
if (mPresContext) {
mPresContext->SetShell(nsnull);
}
if (mViewEventListener) {
mViewEventListener->SetPresShell((nsIPresShell*)nsnull);
NS_RELEASE(mViewEventListener);
}
// Revoke pending reflow events
mReflowEventQueue = nsnull;
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
eventQueue->RevokeEvents(this);
CancelAllReflowCommands();
KillResizeEventTimer();
return NS_OK;
}
// Dynamic stack memory allocation
NS_IMETHODIMP
PresShell::PushStackMemory()
{
if (!mStackArena) {
mStackArena = new StackArena();
if (!mStackArena)
return NS_ERROR_OUT_OF_MEMORY;
}
return mStackArena->Push();
}
NS_IMETHODIMP
PresShell::PopStackMemory()
{
NS_ENSURE_TRUE(mStackArena, NS_ERROR_UNEXPECTED);
return mStackArena->Pop();
}
NS_IMETHODIMP
PresShell::AllocateStackMemory(size_t aSize, void** aResult)
{
if (!mStackArena) {
mStackArena = new StackArena();
if (!mStackArena)
return NS_ERROR_OUT_OF_MEMORY;
}
return mStackArena->Allocate(aSize, aResult);
}
void
PresShell::FreeDynamicStack()
{
if (mStackArena) {
delete mStackArena;
mStackArena = nsnull;
}
}
NS_IMETHODIMP
PresShell::FreeFrame(size_t aSize, void* aPtr)
{
mFrameArena.FreeFrame(aSize, aPtr);
return NS_OK;
}
NS_IMETHODIMP
PresShell::AllocateFrame(size_t aSize, void** aResult)
{
return mFrameArena.AllocateFrame(aSize, aResult);
}
NS_IMETHODIMP
PresShell::GetDocument(nsIDocument** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mDocument;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPresContext(nsIPresContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mPresContext;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetViewManager(nsIViewManager** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mViewManager;
NS_IF_ADDREF(mViewManager);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetStyleSet(nsIStyleSet** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = mStyleSet;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetActiveAlternateStyleSheet(nsString& aSheetTitle)
{ // first non-html sheet in style set that has title
if (mStyleSet) {
PRInt32 count = mStyleSet->GetNumberOfDocStyleSheets();
PRInt32 index;
NS_NAMED_LITERAL_STRING(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 = 0;
mDocument->GetNumberOfStyleSheets(PR_FALSE, &count);
PRInt32 index;
NS_NAMED_LITERAL_STRING(textHtml,"text/html");
for (index = 0; index < count; index++) {
nsCOMPtr<nsIStyleSheet> sheet;
mDocument->GetStyleSheetAt(index, PR_FALSE, getter_AddRefs(sheet));
PRBool complete;
sheet->GetComplete(complete);
if (complete) {
nsAutoString type;
sheet->GetType(type);
if (!type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (!title.IsEmpty()) {
if (title.Equals(aSheetTitle)) {
mStyleSet->AddDocStyleSheet(sheet, mDocument);
}
else {
mStyleSet->RemoveDocStyleSheet(sheet);
}
}
}
}
}
// We don't need to rebuild the
// rule tree, since no rule nodes have been rendered invalid by the
// addition of new rule content. They can simply lurk in the tree
// until the stylesheet is enabled once more.
return ReconstructStyleData(PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ListAlternateStyleSheets(nsStringArray& aTitleList)
{
// XXX should this be returning incomplete sheets? Probably.
if (mDocument) {
PRInt32 count = 0;
mDocument->GetNumberOfStyleSheets(PR_FALSE, &count);
PRInt32 index;
NS_NAMED_LITERAL_STRING(textHtml,"text/html");
for (index = 0; index < count; index++) {
nsCOMPtr<nsIStyleSheet> sheet;
mDocument->GetStyleSheetAt(index, PR_FALSE, getter_AddRefs(sheet));
if (sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (0 < title.Length()) {
if (-1 == aTitleList.IndexOf(title)) {
aTitleList.AppendString(title);
}
}
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::EnablePrefStyleRules(PRBool aEnable, PRUint8 aPrefType/*=0xFF*/)
{
nsresult result = NS_OK;
// capture change in state
PRBool bChanging = (mEnablePrefStyleSheet != aEnable) ? PR_TRUE : PR_FALSE;
// set to desired state
mEnablePrefStyleSheet = aEnable;
#ifdef DEBUG_attinasi
printf("PrefStyleSheet %s %s\n",
mEnablePrefStyleSheet ? "ENABLED" : "DISABLED",
bChanging ? "(state toggled)" : "(state unchanged)");
#endif
// deal with changing state
if(bChanging){
switch (mEnablePrefStyleSheet){
case PR_TRUE:
// was off, now on, so create the rules
result = SetPreferenceStyleRules(PR_TRUE);
break;
default :
// was on, now off, so clear the rules
result = ClearPreferenceStyleRules();
break;
}
}
return result;
}
NS_IMETHODIMP
PresShell::ArePrefStyleRulesEnabled(PRBool& aEnabled)
{
aEnabled = mEnablePrefStyleSheet;
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetPreferenceStyleRules(PRBool aForceReflow)
{
if (!mDocument) {
return NS_ERROR_NULL_POINTER;
}
nsCOMPtr<nsIScriptGlobalObject> globalObj;
mDocument->GetScriptGlobalObject(getter_AddRefs(globalObj));
// If the document doesn't have a global object there's no need to
// notify its presshell about changes to preferences since the
// document is in a state where it doesn't matter any more (see
// DocumentViewerImpl::Close()).
if (!globalObj) {
return NS_ERROR_NULL_POINTER;
}
NS_PRECONDITION(mPresContext, "presContext cannot be null");
if (mPresContext) {
nsresult result = NS_OK;
// zeroth, make sure this feature is enabled
// XXX: may get more granularity later
// (i.e. each pref may be controlled independently)
if (!mEnablePrefStyleSheet) {
#ifdef DEBUG_attinasi
printf("PrefStyleSheet disabled\n");
#endif
return PR_TRUE;
}
// first, make sure this is not a chrome shell
nsCOMPtr<nsISupports> container;
result = mPresContext->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::typeChrome == docShellType){
return NS_OK;
}
}
}
}
if (NS_SUCCEEDED(result)) {
#ifdef DEBUG_attinasi
printf("Setting Preference Style Rules:\n");
#endif
// if here, we need to create rules for the prefs
// - this includes the background-color, the text-color,
// the link color, the visited link color and the link-underlining
// first clear any exising rules
result = ClearPreferenceStyleRules();
// now do the color rules
if (NS_SUCCEEDED(result)) {
result = SetPrefColorRules();
}
// now the link rules (must come after the color rules, or links will not be correct color!)
// XXX - when there is both an override and agent pref stylesheet this won't matter,
// as the color rules will be overrides and the links rules will be agent
if (NS_SUCCEEDED(result)) {
result = SetPrefLinkRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefFocusRules();
}
// update the styleset now that we are done inserting our rules
if (NS_SUCCEEDED(result)) {
if (mStyleSet) {
mStyleSet->NotifyStyleSheetStateChanged(PR_TRUE);
}
}
}
#ifdef DEBUG_attinasi
printf( "Preference Style Rules set: error=%ld\n", (long)result);
#endif
if (aForceReflow){
mPresContext->ClearStyleDataAndReflow();
}
return result;
}
return NS_ERROR_NULL_POINTER;
}
nsresult PresShell::ClearPreferenceStyleRules(void)
{
nsresult result = NS_OK;
if (mPrefStyleSheet) {
NS_ASSERTION(mStyleSet, "null styleset entirely unexpected!");
if (mStyleSet) {
// remove the sheet from the styleset:
// - note that we have to check for success by comparing the count before and after...
#ifdef NS_DEBUG
PRInt32 numBefore = mStyleSet->GetNumberOfUserStyleSheets();
NS_ASSERTION(numBefore > 0, "no user stylesheets in styleset, but we have one!");
#endif
mStyleSet->RemoveUserStyleSheet(mPrefStyleSheet);
#ifdef DEBUG_attinasi
NS_ASSERTION((numBefore - 1) == mStyleSet->GetNumberOfUserStyleSheets(),
"Pref stylesheet was not removed");
printf("PrefStyleSheet removed\n");
#endif
// clear the sheet pointer: it is strictly historical now
NS_IF_RELEASE(mPrefStyleSheet);
}
}
return result;
}
nsresult PresShell::CreatePreferenceStyleSheet(void)
{
NS_ASSERTION(mPrefStyleSheet==nsnull, "prefStyleSheet already exists");
nsresult result = NS_OK;
result = nsComponentManager::CreateInstance(kCSSStyleSheetCID,nsnull,NS_GET_IID(nsICSSStyleSheet),(void**)&mPrefStyleSheet);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "null but no error");
nsCOMPtr<nsIURI> uri;
result = NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nsnull);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(uri, "null but no error");
result = mPrefStyleSheet->Init(uri);
if (NS_SUCCEEDED(result)) {
mPrefStyleSheet->SetComplete();
mPrefStyleSheet->SetDefaultNameSpaceID(kNameSpaceID_XHTML);
mStyleSet->InsertUserStyleSheetBefore(mPrefStyleSheet, nsnull);
}
}
} else {
result = NS_ERROR_OUT_OF_MEMORY;
}
#ifdef DEBUG_attinasi
printf("CreatePrefStyleSheet completed: error=%ld\n",(long)result);
#endif
return result;
}
nsresult PresShell::SetPrefColorRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (mPresContext) {
nsresult result = NS_OK;
PRBool useDocColors = PR_TRUE;
// see if we need to create the rules first
if (NS_SUCCEEDED(mPresContext->GetCachedBoolPref(kPresContext_UseDocumentColors, useDocColors))) {
if (!useDocColors) {
#ifdef DEBUG_attinasi
printf(" - Creating rules for document colors\n");
#endif
// OK, not using document colors, so we have to force the user's colors via style rules
if (!mPrefStyleSheet) {
result = CreatePreferenceStyleSheet();
}
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
nscolor bgColor;
nscolor textColor;
result = mPresContext->GetDefaultColor(&textColor);
if (NS_SUCCEEDED(result)) {
result = mPresContext->GetDefaultBackgroundColor(&bgColor);
}
if (NS_SUCCEEDED(result)) {
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet,&result));
if (NS_SUCCEEDED(result)) {
PRUint32 index = 0;
nsAutoString strColor, strBackgroundColor;
// create a rule for background and foreground color and
// add it to the style sheet
// - the rule is !important so it overrides all but author
// important rules (when put into an agent stylesheet) and
// all (even author important) when put into an override stylesheet
///////////////////////////////////////////////////////////////
// - default colors: ':root {color:#RRGGBB !important;
// background: #RRGGBB !important;}'
ColorToString(textColor,strColor);
ColorToString(bgColor,strBackgroundColor);
result = sheet->InsertRule(NS_LITERAL_STRING(":root {color:") +
strColor +
NS_LITERAL_STRING(" !important; ") +
NS_LITERAL_STRING("border-color: -moz-use-text-color !important; ") +
NS_LITERAL_STRING("background:") +
strBackgroundColor +
NS_LITERAL_STRING(" !important; }"),
0,&index);
NS_ENSURE_SUCCESS(result, result);
///////////////////////////////////////////////////////////////
// - everything else inherits the color, and has transparent background
result = sheet->InsertRule(NS_LITERAL_STRING("* {color: inherit !important; border-color: -moz-use-text-color !important; background: transparent !important;} "),
0,&index);
}
}
}
}
}
return result;
} else {
return NS_ERROR_FAILURE;
}
}
nsresult PresShell::SetPrefLinkRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (mPresContext) {
nsresult result = NS_OK;
if (!mPrefStyleSheet) {
result = CreatePreferenceStyleSheet();
}
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet,&result));
if (NS_SUCCEEDED(result)) {
#ifdef DEBUG_attinasi
printf(" - Creating rules for link and visited colors\n");
#endif
// support default link colors:
// this means the link colors need to be overridable,
// which they are if we put them in the agent stylesheet,
// though if using an override sheet this will cause authors grief still
// In the agent stylesheet, they are !important when we are ignoring document colors
//
// XXX: Do active links and visited links get another color?
// They are red in the html.css rules, but there is no pref for their color.
nscolor linkColor, visitedColor;
result = mPresContext->GetDefaultLinkColor(&linkColor);
if (NS_SUCCEEDED(result)) {
result = mPresContext->GetDefaultVisitedLinkColor(&visitedColor);
}
if (NS_SUCCEEDED(result)) {
// insert a rule to make links the preferred color
PRUint32 index = 0;
nsAutoString strColor;
PRBool useDocColors = PR_TRUE;
// see if we need to create the rules first
mPresContext->GetCachedBoolPref(kPresContext_UseDocumentColors, useDocColors);
///////////////////////////////////////////////////////////////
// - links: '*:link {color: #RRGGBB [!important];}'
ColorToString(linkColor,strColor);
NS_NAMED_LITERAL_STRING(notImportantStr, "}");
NS_NAMED_LITERAL_STRING(importantStr, "!important}");
const nsAString& ruleClose = useDocColors ? notImportantStr : importantStr;
result = sheet->InsertRule(NS_LITERAL_STRING("*:link{color:") +
strColor +
ruleClose,
0,&index);
NS_ENSURE_SUCCESS(result, result);
///////////////////////////////////////////////////////////////
// - visited links '*:visited {color: #RRGGBB [!important];}'
ColorToString(visitedColor,strColor);
// insert the rule
result = sheet->InsertRule(NS_LITERAL_STRING("*:visited{color:") +
strColor +
ruleClose,
0,&index);
///////////////////////////////////////////////////////////////
// - active links '*:-moz-any-link {color: red [!important];}'
// This has to be here (i.e. we can't just rely on the rule in the UA stylesheet)
// because this entire stylesheet is at the user level (not UA level) and so
// the two rules above override the rule in the UA stylesheet regardless of the
// weights of the respective rules.
result = sheet->InsertRule(NS_LITERAL_STRING("*:-moz-any-link:active{color:red") +
ruleClose,
0,&index);
}
if (NS_SUCCEEDED(result)) {
PRBool underlineLinks = PR_TRUE;
result = mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks,underlineLinks);
if (NS_SUCCEEDED(result)) {
// create a rule for underline: on or off
PRUint32 index = 0;
nsAutoString strRule;
if (underlineLinks) {
// create a rule to make underlining happen
// ':link, :visited {text-decoration:[underline|none];}'
// no need for important, we want these to be overridable
// NOTE: these must go in the agent stylesheet or they cannot be
// overridden by authors
#ifdef DEBUG_attinasi
printf (" - Creating rules for enabling link underlines\n");
#endif
// make a rule to make text-decoration: underline happen for links
strRule.Append(NS_LITERAL_STRING("*:-moz-any-link{text-decoration:underline}"));
} else {
#ifdef DEBUG_attinasi
printf (" - Creating rules for disabling link underlines\n");
#endif
// make a rule to make text-decoration: none happen for links
strRule.Append(NS_LITERAL_STRING("*:-moz-any-link{text-decoration:none}"));
}
// ...now insert the rule
result = sheet->InsertRule(strRule,0,&index);
}
}
}
}
return result;
} else {
return NS_ERROR_FAILURE;
}
}
nsresult PresShell::SetPrefFocusRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
nsresult result = NS_OK;
if (!mPresContext)
result = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(result) && !mPrefStyleSheet)
result = CreatePreferenceStyleSheet();
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet,&result));
if (NS_SUCCEEDED(result)) {
PRBool useFocusColors;
mPresContext->GetUseFocusColors(useFocusColors);
nscolor focusBackground, focusText;
result = mPresContext->GetFocusBackgroundColor(&focusBackground);
nsresult result2 = mPresContext->GetFocusTextColor(&focusText);
if (useFocusColors && NS_SUCCEEDED(result) && NS_SUCCEEDED(result2)) {
// insert a rule to make focus the preferred color
PRUint32 index = 0;
nsAutoString strRule, strColor;
///////////////////////////////////////////////////////////////
// - focus: '*:focus
ColorToString(focusText,strColor);
strRule.Append(NS_LITERAL_STRING("*:focus,*:focus>font {color: "));
strRule.Append(strColor);
strRule.Append(NS_LITERAL_STRING(" !important; background-color: "));
ColorToString(focusBackground,strColor);
strRule.Append(strColor);
strRule.Append(NS_LITERAL_STRING(" !important; } "));
// insert the rules
result = sheet->InsertRule(strRule,0,&index);
}
PRUint8 focusRingWidth = 1;
result = mPresContext->GetFocusRingWidth(&focusRingWidth);
PRBool focusRingOnAnything;
mPresContext->GetFocusRingOnAnything(focusRingOnAnything);
if ((NS_SUCCEEDED(result) && focusRingWidth != 1 && focusRingWidth <= 4 ) || focusRingOnAnything) {
PRUint32 index = 0;
nsAutoString strRule;
if (!focusRingOnAnything)
strRule.Append(NS_LITERAL_STRING(":link:focus, :visited")); // If we only want focus rings on the normal things like links
strRule.Append(NS_LITERAL_STRING(":focus {-moz-outline: ")); // For example 3px dotted WindowText (maximum 4)
strRule.AppendInt(focusRingWidth);
strRule.Append(NS_LITERAL_STRING("px dotted WindowText !important; } ")); // For example 3px dotted WindowText
// insert the rules
result = sheet->InsertRule(strRule,0,&index);
NS_ENSURE_SUCCESS(result, result);
if (focusRingWidth != 1) {
// If the focus ring width is different from the default, fix buttons with rings
strRule.Assign(NS_LITERAL_STRING("button:-moz-focus-inner, input[type=\"reset\"]:-moz-focus-inner,"));
strRule.Append(NS_LITERAL_STRING("input[type=\"button\"]:-moz-focus-inner, "));
strRule.Append(NS_LITERAL_STRING("input[type=\"submit\"]:-moz-focus-inner { padding: 1px 2px 1px 2px; border: "));
strRule.AppendInt(focusRingWidth);
strRule.Append(NS_LITERAL_STRING("px dotted transparent !important; } "));
result = sheet->InsertRule(strRule,0,&index);
NS_ENSURE_SUCCESS(result, result);
strRule.Assign(NS_LITERAL_STRING("button:focus:-moz-focus-inner, input[type=\"reset\"]:focus:-moz-focus-inner,"));
strRule.Append(NS_LITERAL_STRING("input[type=\"button\"]:focus:-moz-focus-inner, input[type=\"submit\"]:focus:-moz-focus-inner {"));
strRule.Append(NS_LITERAL_STRING("border-color: ButtonText !important; }"));
result = sheet->InsertRule(strRule,0,&index);
}
}
}
}
return result;
}
NS_IMETHODIMP
PresShell::SetDisplaySelection(PRInt16 aToggle)
{
return mSelection->SetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetDisplaySelection(PRInt16 *aToggle)
{
return mSelection->GetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetSelection(SelectionType aType, nsISelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->GetSelection(aType, aSelection);
}
NS_IMETHODIMP
PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->ScrollSelectionIntoView(aType, aRegion, aIsSynchronous);
}
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()
{
mIsDocumentGone = PR_TRUE;
if (mDocument) {
mDocument->RemoveObserver(this);
}
if (mSelection){
nsCOMPtr<nsISelection> domselection;
nsresult result;
result = mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domselection));
if (NS_FAILED(result))
return result;
if (!domselection)
return NS_ERROR_UNEXPECTED;
mSelection->ShutDown();
}
return NS_OK;
}
#ifdef DEBUG_kipp
char* nsPresShell_ReflowStackPointerTop;
#endif
static void CheckForFocus(nsPIDOMWindow* aOurWindow, nsIFocusController* aFocusController, nsIDocument* aDocument)
{
// Now that we have a root frame, set focus in to the presshell, but
// only do this if our window is currently focused
// Restore focus if we're the active window or a parent of a previously
// active window.
if (aFocusController) {
nsCOMPtr<nsIDOMWindowInternal> focusedWindow;
aFocusController->GetFocusedWindow(getter_AddRefs(focusedWindow));
// See if the command dispatcher is holding on to an orphan window.
// This happens when you move from an inner frame to an outer frame
// (e.g., _parent, _top)
if (focusedWindow) {
nsCOMPtr<nsIDOMDocument> domDoc;
focusedWindow->GetDocument(getter_AddRefs(domDoc));
if (!domDoc) {
// We're pointing to garbage. Go ahead and let this
// presshell take the focus.
focusedWindow = do_QueryInterface(aOurWindow);
aFocusController->SetFocusedWindow(focusedWindow);
}
}
nsCOMPtr<nsIDOMWindowInternal> domWindow = do_QueryInterface(aOurWindow);
if (domWindow == focusedWindow) {
PRBool active;
aFocusController->GetActive(&active);
if(active) {
// We need to restore focus to the window.
domWindow->Focus();
}
}
}
}
nsresult
PresShell::NotifyReflowObservers(const char *aData)
{
if (!aData) { return NS_ERROR_NULL_POINTER; }
nsresult result = NS_OK;
nsCOMPtr<nsISupports> pContainer;
nsCOMPtr<nsIDocShell> pDocShell;
result = mPresContext->GetContainer( getter_AddRefs( pContainer ) );
if (NS_SUCCEEDED( result ) && pContainer) {
pDocShell = do_QueryInterface( pContainer,
&result );
if (NS_SUCCEEDED( result ) && pDocShell && mObserverService) {
result = mObserverService->NotifyObservers( pDocShell,
NS_PRESSHELL_REFLOW_TOPIC,
NS_ConvertASCIItoUCS2(aData).get() );
// notice that we don't really care what the observer service returns
}
}
return NS_OK;
}
static nsresult
GetRootScrollFrame(nsIPresContext* aPresContext, nsIFrame* aRootFrame, nsIFrame** aScrollFrame) {
// Frames: viewport->scroll->scrollport (Gfx) or viewport->scroll (Native)
// Types: viewport->scroll->sroll viewport->scroll
// Ensure root frame is a viewport frame
*aScrollFrame = nsnull;
nsIFrame* theFrame = nsnull;
if (aRootFrame) {
nsCOMPtr<nsIAtom> fType;
aRootFrame->GetFrameType(getter_AddRefs(fType));
if (fType && (nsLayoutAtoms::viewportFrame == fType.get())) {
// If child is scrollframe keep it (native)
aRootFrame->FirstChild(aPresContext, nsnull, &theFrame);
if (theFrame) {
theFrame->GetFrameType(getter_AddRefs(fType));
if (nsLayoutAtoms::scrollFrame == fType.get()) {
*aScrollFrame = theFrame;
// If the first child of that is scrollframe, use it instead (gfx)
theFrame->FirstChild(aPresContext, nsnull, &theFrame);
if (theFrame) {
theFrame->GetFrameType(getter_AddRefs(fType));
if (nsLayoutAtoms::scrollFrame == fType.get()) {
*aScrollFrame = theFrame;
}
}
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetDidInitialReflow(PRBool *aDidInitialReflow)
{
if (!aDidInitialReflow)
return NS_ERROR_FAILURE;
*aDidInitialReflow = mDidInitialReflow;
return NS_OK;
}
NS_IMETHODIMP
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
nsCOMPtr<nsIContent> root;
mDidInitialReflow = PR_TRUE;
#ifdef NS_DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
nsCOMPtr<nsIURI> uri;
if (mDocument) {
mDocument->GetDocumentURL(getter_AddRefs(uri));
if (uri) {
nsCAutoString url;
uri->GetSpec(url);
printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", (void*)this, url.get());
}
}
}
#endif
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_INITIAL_REFLOW);
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
WillCauseReflow();
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
if (mDocument) {
mDocument->GetRootContent(getter_AddRefs(root));
}
// Get the root frame from the frame manager
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (root) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_RESET(mFrameCreationWatch);
MOZ_TIMER_START(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchEnable,mStyleSet);
if (!rootFrame) {
// Have style sheet processor construct a frame for the
// precursors to the root content object's frame
mStyleSet->ConstructRootFrame(mPresContext, root, rootFrame);
mFrameManager->SetRootFrame(rootFrame);
}
// Have the style sheet processor construct frame for the root
// content object down
mStyleSet->ContentInserted(mPresContext, nsnull, root, 0);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_STOP(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchDisable,mStyleSet);
}
if (rootFrame) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Reflow: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_RESET(mReflowWatch);
MOZ_TIMER_START(mReflowWatch);
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::InitialReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
mIsReflowing = PR_TRUE;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Initial, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(mPresContext, rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsIView* view;
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::InitialReflow"));
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::InitialReflow(), this=%p\n", (void*)this));
MOZ_TIMER_STOP(mReflowWatch);
mIsReflowing = PR_FALSE;
}
DidCauseReflow();
if (mViewManager && mCaret && !mViewEventListener) {
nsIScrollableView* scrollingView = nsnull;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
mViewEventListener = new PresShellViewEventListener;
if (!mViewEventListener)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mViewEventListener);
mViewEventListener->SetPresShell(this);
scrollingView->AddScrollPositionListener((nsIScrollPositionListener *)mViewEventListener);
mViewManager->AddCompositeListener((nsICompositeListener *)mViewEventListener);
}
}
// For printing, we just immediately unsuppress.
PRBool isPaginated = PR_FALSE;
mPresContext->IsPaginated(&isPaginated);
if (!isPaginated) {
// Kick off a one-shot timer based off our pref value. When this timer
// fires, if painting is still locked down, then we will go ahead and
// trigger a full invalidate and allow painting to proceed normally.
mPaintingSuppressed = PR_TRUE;
mPaintSuppressionTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPaintSuppressionTimer)
// Uh-oh. We must be out of memory. No point in keeping painting locked down.
mPaintingSuppressed = PR_FALSE;
else {
// Initialize the timer.
PRInt32 delay = PAINTLOCK_EVENT_DELAY; // Use this value if we fail to get the pref value.
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefBranch)
prefBranch->GetIntPref("nglayout.initialpaint.delay", &delay);
nsCOMPtr<nsITimerInternal> ti = do_QueryInterface(mPaintSuppressionTimer);
ti->SetIdle(PR_FALSE);
mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback, this, delay,
nsITimer::TYPE_ONE_SHOT);
}
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::sPaintSuppressionCallback(nsITimer *aTimer, void* aPresShell)
{
PresShell* self = NS_STATIC_CAST(PresShell*, aPresShell);
if (self)
self->UnsuppressPainting();
}
NS_IMETHODIMP
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
PRBool firstReflow = PR_FALSE;
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_RESIZE_REFLOW);
mViewManager->CacheWidgetChanges(PR_TRUE);
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
WillCauseReflow();
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
// If we don't have a root frame yet, that means we haven't had our initial
// reflow...
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::ResizeReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Resize, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(mPresContext, rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsIView* view;
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::ResizeReflow"));
// XXX if debugging then we should assert that the cache is empty
} else {
firstReflow = PR_TRUE;
#ifdef NOISY
printf("PresShell::ResizeReflow: null root frame\n");
#endif
}
DidCauseReflow();
// if the proper flag is set, VerifyReflow now
#ifdef NS_DEBUG
if (GetVerifyReflowEnable() && (VERIFY_REFLOW_DURING_RESIZE_REFLOW & gVerifyReflowFlags))
{
mInVerifyReflow = PR_TRUE;
/*PRBool ok = */VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
}
#endif
mViewManager->CacheWidgetChanges(PR_FALSE);
HandlePostedDOMEvents();
HandlePostedAttributeChanges();
HandlePostedReflowCallbacks();
if (!firstReflow) {
//Set resize event timer
CreateResizeEventTimer();
}
return NS_OK; //XXX this needs to be real. MMP
}
#define RESIZE_EVENT_DELAY 200
void
PresShell::CreateResizeEventTimer ()
{
KillResizeEventTimer();
if (mIsDocumentGone)
return;
mResizeEventTimer = do_CreateInstance("@mozilla.org/timer;1");
if (mResizeEventTimer) {
mResizeEventTimer->InitWithFuncCallback(sResizeEventCallback, this, RESIZE_EVENT_DELAY,
nsITimer::TYPE_ONE_SHOT);
}
}
void
PresShell::KillResizeEventTimer()
{
if(mResizeEventTimer) {
mResizeEventTimer->Cancel();
mResizeEventTimer = nsnull;
}
}
void
PresShell::sResizeEventCallback(nsITimer *aTimer, void* aPresShell)
{
PresShell* self = NS_STATIC_CAST(PresShell*, aPresShell);
if (self) {
self->FireResizeEvent();
}
}
void
PresShell::FireResizeEvent()
{
if (mIsDocumentGone)
return;
//Send resize event from here.
nsEvent event;
nsEventStatus status = nsEventStatus_eIgnore;
event.eventStructType = NS_EVENT;
event.message = NS_RESIZE_EVENT;
event.time = 0;
nsCOMPtr<nsIScriptGlobalObject> globalObj;
mDocument->GetScriptGlobalObject(getter_AddRefs(globalObj));
if (globalObj) {
globalObj->HandleDOMEvent(mPresContext, &event, nsnull, NS_EVENT_FLAG_INIT, &status);
}
}
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::SetIgnoreFrameDestruction(PRBool aIgnore)
{
mIgnoreFrameDestruction = aIgnore;
return NS_OK;
}
NS_IMETHODIMP
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame)
{
if (!mIgnoreFrameDestruction) {
// Cancel any pending reflow commands targeted at this frame
CancelReflowCommandInternal(aFrame, nsnull);
// Notify the frame manager
if (mFrameManager) {
mFrameManager->NotifyDestroyingFrame(aFrame);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetFrameManager(nsIFrameManager** aFrameManager) const
{
*aFrameManager = mFrameManager;
NS_IF_ADDREF(mFrameManager);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaret(nsICaret **outCaret)
{
if (!outCaret || !mCaret)
return NS_ERROR_NULL_POINTER;
return mCaret->QueryInterface(NS_GET_IID(nsICaret), (void **)outCaret);
}
NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable)
{
nsresult result = NS_OK;
PRBool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
/* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled()
nsCOMPtr<nsIDOMSelection> domSel;
if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel)
mCaret->SetCaretDOMSelection(domSel);
*/
result = mCaret->SetCaretVisible(mCaretEnabled);
}
return result;
}
NS_IMETHODIMP PresShell::SetCaretWidth(PRInt16 pixels)
{
return mCaret->SetCaretWidth(pixels);
}
NS_IMETHODIMP PresShell::SetCaretReadOnly(PRBool aReadOnly)
{
return mCaret->SetCaretReadOnly(aReadOnly);
}
NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled)
{
if (!aOutEnabled) { return NS_ERROR_INVALID_ARG; }
*aOutEnabled = mCaretEnabled;
return NS_OK;
}
NS_IMETHODIMP PresShell::SetSelectionFlags(PRInt16 aInEnable)
{
mSelectionFlags = aInEnable;
return NS_OK;
}
NS_IMETHODIMP PresShell::GetSelectionFlags(PRInt16 *aOutEnable)
{
if (!aOutEnable)
return NS_ERROR_INVALID_ARG;
*aOutEnable = mSelectionFlags;
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)
{
nsresult result = mSelection->LineMove(aForward, aExtend);
// if we cant go down/up any more we must then move caret completely to
// end/beginning respectively.
if (NS_FAILED(result))
result = CompleteMove(aForward,aExtend);
return result;
}
NS_IMETHODIMP
PresShell::IntraLineMove(PRBool aForward, PRBool aExtend)
{
return mSelection->IntraLineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::PageMove(PRBool aForward, PRBool aExtend)
{
nsresult result;
nsCOMPtr<nsIViewManager> viewManager;
nsIScrollableView *scrollableView;
result = GetViewManager(getter_AddRefs(viewManager));
if (NS_FAILED(result))
return result;
if (!viewManager)
return NS_ERROR_UNEXPECTED;
result = viewManager->GetRootScrollableView(&scrollableView);
if (NS_FAILED(result))
return result;
if (!scrollableView)
return NS_ERROR_UNEXPECTED;
nsIView *scrolledView;
result = scrollableView->GetScrolledView(scrolledView);
mSelection->CommonPageMove(aForward, aExtend, scrollableView, mSelection);
// do ScrollSelectionIntoView()
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
}
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)
{
#ifdef MOZ_WIDGET_COCOA
// Emulate the Mac IE behavior of scrolling a minimum of 2 lines
// rather than 1. This vastly improves scrolling speed.
scrollView->ScrollByLines(0, aForward ? 2 : -2);
#else
scrollView->ScrollByLines(0, aForward ? 1 : -1);
#endif
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
viewManager->ForceUpdate();
}
}
return result;
}
NS_IMETHODIMP
PresShell::ScrollHorizontal(PRBool aLeft)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByLines(aLeft ? -1 : 1, 0);
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
viewManager->ForceUpdate();
}
}
return result;
}
NS_IMETHODIMP
PresShell::CompleteScroll(PRBool aForward)
{
nsCOMPtr<nsIViewManager> viewManager;
nsresult result = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(result) && viewManager)
{
nsIScrollableView *scrollView;
result = viewManager->GetRootScrollableView(&scrollView);
if (NS_SUCCEEDED(result) && scrollView)
{
scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom
}
}
return result;
}
NS_IMETHODIMP
PresShell::CompleteMove(PRBool aForward, PRBool aExtend)
{
nsIScrollableView *scrollableView;
if (!mViewManager)
return NS_ERROR_UNEXPECTED;
nsresult result = mViewManager->GetRootScrollableView(&scrollableView);
if (NS_FAILED(result))
return result;
if (!scrollableView)
return NS_ERROR_UNEXPECTED;
nsIView *scrolledView;
result = scrollableView->GetScrolledView(scrolledView);
// get a frame
void *clientData;
scrolledView->GetClientData(clientData);
nsIFrame *frame = (nsIFrame *)clientData;
if (!frame)
return NS_ERROR_FAILURE;
//we need to get to the area frame.
nsCOMPtr<nsIAtom> frameType;
do
{
frame->GetFrameType(getter_AddRefs(frameType));
if (frameType != nsLayoutAtoms::areaFrame)
{
result = frame->FirstChild(mPresContext, nsnull, &frame);
if (NS_FAILED(result) || !frame)
break;
}
}while(frameType != nsLayoutAtoms::areaFrame);
if (!frame)
return NS_ERROR_FAILURE; //could not find an area frame.
PRInt8 outsideLimit = -1;//search from beginning
nsPeekOffsetStruct pos;
pos.mAmount = eSelectLine;
pos.mTracker = this;
pos.mContentOffset = 0;
pos.mContentOffsetEnd = 0;
pos.mScrollViewStop = PR_FALSE;//dont stop on scrolled views.
pos.mIsKeyboardSelect = PR_TRUE;
if (aForward)
{
outsideLimit = 1;//search from end
nsRect rect;
frame->GetRect(rect);
pos.mDesiredX = rect.width * 2;//search way off to right of line
pos.mDirection = eDirPrevious; //seach backwards from the end
}
else
{
pos.mDesiredX = -1; //start before line
pos.mDirection = eDirNext; //search forwards from before beginning
}
do
{
result = nsFrame::GetNextPrevLineFromeBlockFrame(mPresContext,
&pos,
frame,
0, //irrelavent since we set outsidelimit
outsideLimit
);
if (NS_POSITION_BEFORE_TABLE == result) //NS_POSITION_BEFORE_TABLE should ALSO break
break;
if (NS_OK != result || !pos.mResultFrame )
return result?result:NS_ERROR_FAILURE;
nsCOMPtr<nsILineIteratorNavigator> newIt;
//check to see if this is ANOTHER blockframe inside the other one if so then call into its lines
result = pos.mResultFrame->QueryInterface(NS_GET_IID(nsILineIteratorNavigator),getter_AddRefs(newIt));
if (NS_SUCCEEDED(result) && newIt)
frame = pos.mResultFrame;
}
while (NS_SUCCEEDED(result));//end 'do'
mSelection->HandleClick(pos.mResultContent ,pos.mContentOffset ,pos.mContentOffsetEnd ,aExtend, PR_FALSE, pos.mPreferLeft);
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
NS_IMETHODIMP
PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval)
{
if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0)
return NS_ERROR_INVALID_ARG;
*_retval = PR_FALSE; //initialize return parameter
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return NS_ERROR_FAILURE;
nsIFrame *frame;
nsresult result = GetPrimaryFrameFor(content,&frame);
if (NS_FAILED(result)) //failure is taken as a no.
return result;
if (!frame) //no frame to look at so it must not be visible
return NS_OK;
//start process now to go through all frames to find startOffset. then check chars after that to see
//if anything until EndOffset is visible.
PRBool finished = PR_FALSE;
frame->CheckVisibility(mPresContext,startOffset,EndOffset,PR_TRUE,&finished, _retval);
return NS_OK;//dont worry about other return val
}
//end implementations nsISelectionController
static void UpdateViewProperties(nsIPresContext* aPresContext, nsIViewManager* aVM,
nsIView* aView) {
nsCOMPtr<nsIViewManager> thisVM;
aView->GetViewManager(*getter_AddRefs(thisVM));
if (thisVM != aVM) {
return;
}
void* clientData;
aView->GetClientData(clientData);
nsIFrame* frame = NS_STATIC_CAST(nsIFrame*, clientData);
if (frame) {
nsContainerFrame::SyncFrameViewProperties(aPresContext, frame, nsnull, aView);
}
nsIView* child;
aView->GetFirstChild(child);
while (child) {
UpdateViewProperties(aPresContext, aVM, child);
child->GetNextSibling(child);
}
}
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
// notify any presshell observers about the reflow.
// notice that we ignore the result
NotifyReflowObservers(NS_PRESSHELL_STYLE_CHANGE_REFLOW);
WillCauseReflow();
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::StyleChangeReflow"));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
nsRect bounds;
mPresContext->GetVisibleArea(bounds);
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_StyleChange, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(mPresContext, rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height);
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsIView* view;
rootFrame->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
}
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow"));
// The following two calls are needed to make sure we reacquire any needed
// style structs that were cleared by the caller
// Update properties of all views to reflect style changes
UpdateViewProperties(mPresContext, mViewManager, view);
// Repaint everything just to be sure
mViewManager->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
}
DidCauseReflow();
return NS_OK; //XXX this needs to be real. MMP
}
NS_IMETHODIMP
PresShell::GetRootFrame(nsIFrame** aResult) const
{
return mFrameManager->GetRootFrame(aResult);
}
NS_IMETHODIMP
PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsIFrame* rootFrame;
nsIFrame* child;
nsIPageSequenceFrame* pageSequence = nsnull;
// The page sequence frame is the child of the rootFrame
mFrameManager->GetRootFrame(&rootFrame);
rootFrame->FirstChild(mPresContext, nsnull, &child);
if (nsnull != child) {
// but the child could be wrapped in a scrollframe so lets check
nsIScrollableFrame* scrollable = nsnull;
nsresult rv = child->QueryInterface(NS_GET_IID(nsIScrollableFrame),
(void **)&scrollable);
if (NS_SUCCEEDED(rv) && (nsnull != scrollable)) {
// if it is then get the scrolled frame
scrollable->GetScrolledFrame(nsnull, child);
} else {
nsCOMPtr<nsIPrintPreviewContext> ppContext = do_QueryInterface(mPresContext);
if (ppContext) {
child->FirstChild(mPresContext, nsnull, &child);
}
}
// make sure the child is a pageSequence
rv = child->QueryInterface(NS_GET_IID(nsIPageSequenceFrame),
(void**)&pageSequence);
NS_ASSERTION(NS_SUCCEEDED(rv),"Error: Could not find pageSequence!");
*aResult = pageSequence;
return NS_OK;
}
*aResult = nsnull;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
PresShell::BeginUpdate(nsIDocument *aDocument)
{
mUpdateCount++;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndUpdate(nsIDocument *aDocument)
{
NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's");
if (--mUpdateCount == 0) {
// XXX do something here
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginLoad(nsIDocument *aDocument)
{
#ifdef MOZ_PERF_METRICS
// Reset style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", (void*)this));
CtlStyleWatch(kStyleWatchReset,mStyleSet);
#endif
mDocumentLoading = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndLoad(nsIDocument *aDocument)
{
// Restore frame state for the root scroll frame
nsIFrame* rootFrame = nsnull;
GetRootFrame(&rootFrame);
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
if (rootFrame && historyState) {
nsIFrame* scrollFrame = nsnull;
GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
mFrameManager->RestoreFrameStateFor(mPresContext, scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState);
}
}
#ifdef MOZ_PERF_METRICS
// Dump reflow, style resolution and frame construction times here.
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
MOZ_TIMER_LOG(("Reflow time (this=%p): ", this));
MOZ_TIMER_PRINT(mReflowWatch);
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
MOZ_TIMER_LOG(("Frame construction plus style resolution time (this=%p): ", this));
MOZ_TIMER_PRINT(mFrameCreationWatch);
// Print style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this));
CtlStyleWatch(kStyleWatchStop|kStyleWatchDisable, mStyleSet);
MOZ_TIMER_LOG(("Style resolution time (this=%p): ", this));
CtlStyleWatch(kStyleWatchPrint, mStyleSet);
#endif
mDocumentLoading = PR_FALSE;
return NS_OK;
}
NS_IMPL_NSIDOCUMENTOBSERVER_REFLOW_STUB(PresShell)
// 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(nsHTMLReflowCommand* aReflowCommand,
nsVoidArray& aQueue)
{
PRInt32 i, n = aQueue.Count();
nsIFrame* targetFrame;
PRBool inQueue = PR_FALSE;
if (NS_SUCCEEDED(aReflowCommand->GetTarget(targetFrame))) {
// Iterate over the reflow commands and compare the targeted frames.
for (i = 0; i < n; i++) {
nsHTMLReflowCommand* rc = (nsHTMLReflowCommand*) aQueue.ElementAt(i);
if (rc) {
nsIFrame* targetOfQueuedRC;
if (NS_SUCCEEDED(rc->GetTarget(targetOfQueuedRC))) {
nsReflowType RCType;
nsReflowType queuedRCType;
aReflowCommand->GetType(RCType);
rc->GetType(queuedRCType);
if (targetFrame == targetOfQueuedRC &&
RCType == queuedRCType) {
nsCOMPtr<nsIAtom> CLName, queuedCLName;
aReflowCommand->GetChildListName(*getter_AddRefs(CLName));
rc->GetChildListName(*getter_AddRefs(queuedCLName));
if (CLName == queuedCLName) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("*** PresShell::AlreadyInQueue(): Discarding reflow command: this=%p\n", (void*)this);
aReflowCommand->List(stdout);
}
#endif
inQueue = PR_TRUE;
break;
}
}
}
}
}
}
return inQueue;
}
NS_IMETHODIMP
PresShell::AppendReflowCommand(nsHTMLReflowCommand* aReflowCommand)
{
// If we've not yet done the initial reflow, then don't bother
// enqueuing a reflow command yet.
if (! mDidInitialReflow)
return NS_OK;
#ifdef DEBUG
//printf("gShellCounter: %d\n", gShellCounter++);
if (mInVerifyReflow) {
return NS_OK;
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\nPresShell@%p: adding reflow command\n", (void*)this);
aReflowCommand->List(stdout);
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf("Current content model:\n");
nsCOMPtr<nsIContent> rootContent;
mDocument->GetRootContent(getter_AddRefs(rootContent));
if (rootContent) {
rootContent->List(stdout, 0);
}
}
}
#endif
// Add the reflow command to the queue
nsresult rv = NS_OK;
if (!AlreadyInQueue(aReflowCommand, mReflowCommands)) {
rv = (mReflowCommands.AppendElement(aReflowCommand) ? NS_OK : NS_ERROR_OUT_OF_MEMORY);
ReflowCommandAdded(aReflowCommand);
}
else {
// We're not going to process this reflow command.
delete aReflowCommand;
}
// For async reflow during doc load, post a reflow event if we are not batching reflow commands.
// For sync reflow during doc load, post a reflow event if we are not batching reflow commands
// and the document is not loading.
if ((gAsyncReflowDuringDocLoad && !mBatchReflows) ||
(!gAsyncReflowDuringDocLoad && !mBatchReflows && !mDocumentLoading)) {
// If we're in the middle of a drag, process it right away (needed for mac,
// might as well do it on all platforms just to keep the code paths the same).
if ( !IsDragInProgress() )
PostReflowEvent();
}
return rv;
}
//
// IsDragInProgress
//
// Ask the drag service if we're in the middle of a drag
//
PRBool
PresShell :: IsDragInProgress ( ) const
{
PRBool dragInProgress = PR_FALSE;
if ( mDragService ) {
nsCOMPtr<nsIDragSession> session;
mDragService->GetCurrentSession ( getter_AddRefs(session) );
if ( session )
dragInProgress = PR_TRUE;
}
return dragInProgress;
} // IsDragInProgress
NS_IMETHODIMP
PresShell::CancelReflowCommandInternal(nsIFrame* aTargetFrame,
nsReflowType* aCmdType,
PRBool aProcessDummyLayoutRequest)
{
PRInt32 i, n = mReflowCommands.Count();
for (i = 0; i < n; i++) {
nsHTMLReflowCommand* rc = (nsHTMLReflowCommand*) mReflowCommands.ElementAt(i);
if (rc) {
nsIFrame* target;
if (NS_SUCCEEDED(rc->GetTarget(target))) {
if (target == aTargetFrame) {
if (aCmdType != NULL) {
// If aCmdType is specified, only remove reflow commands
// of that type
nsReflowType type;
if (NS_SUCCEEDED(rc->GetType(type))) {
if (type != *aCmdType)
continue;
}
}
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("PresShell: removing rc=%p for frame ", (void*)rc);
nsFrame::ListTag(stdout, aTargetFrame);
printf("\n");
}
#endif
mReflowCommands.RemoveElementAt(i);
ReflowCommandRemoved(rc);
delete rc;
n--;
i--;
continue;
}
}
}
}
if (aProcessDummyLayoutRequest) {
DoneRemovingReflowCommands();
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelReflowCommand(nsIFrame* aTargetFrame,
nsReflowType* aCmdType)
{
return CancelReflowCommandInternal(aTargetFrame, aCmdType);
}
NS_IMETHODIMP
PresShell::CancelAllReflowCommands()
{
PRInt32 n = mReflowCommands.Count();
nsHTMLReflowCommand* rc;
PRInt32 i;
for (i = 0; i < n; i++) {
rc = NS_STATIC_CAST(nsHTMLReflowCommand*, mReflowCommands.ElementAt(i));
ReflowCommandRemoved(rc);
delete rc;
}
NS_ASSERTION(n == mReflowCommands.Count(),"reflow command list changed during cancel!");
mReflowCommands.Clear();
DoneRemovingReflowCommands();
return NS_OK;
}
NS_IMETHODIMP
PresShell::RecreateFramesFor(nsIContent* aContent)
{
NS_ENSURE_TRUE(mPresContext, NS_ERROR_FAILURE);
nsCOMPtr<nsIStyleSet> styleSet;
nsresult rv = GetStyleSet(getter_AddRefs(styleSet));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIStyleFrameConstruction> frameConstruction;
rv = styleSet->GetStyleFrameConstruction(getter_AddRefs(frameConstruction));
NS_ENSURE_SUCCESS(rv, rv);
// Don't call RecreateFramesForContent since that is not exported and we want
// to keep the number of entrypoints down.
nsStyleChangeList changeList;
changeList.AppendChange(nsnull, aContent, nsChangeHint_ReconstructFrame);
return frameConstruction->ProcessRestyledFrames(changeList, mPresContext);
}
NS_IMETHODIMP
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
manager->ClearFrameRefs(aFrame);
NS_RELEASE(manager);
}
if (mCaret) {
mCaret->ClearFrameRefs(aFrame);
}
if (aFrame == mCurrentEventFrame) {
aFrame->GetContent(&mCurrentEventContent);
mCurrentEventFrame = nsnull;
}
for (int i=0; i<mCurrentEventFrameStack.Count(); i++) {
if (aFrame == (nsIFrame*)mCurrentEventFrameStack.ElementAt(i)) {
//One of our stack frames was deleted. Get its content so that when we
//pop it we can still get its new frame from its content
nsIContent *currentEventContent;
aFrame->GetContent(&currentEventContent);
mCurrentEventContentStack.ReplaceElementAt((void*)currentEventContent, i);
mCurrentEventFrameStack.ReplaceElementAt(nsnull, i);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsIView *view = nsnull;
nsPoint pt;
nsresult rv;
aFrame->GetView(mPresContext, &view);
if (nsnull == view)
aFrame->GetOffsetFromView(mPresContext, pt, &view);
nsCOMPtr<nsIWidget> widget;
if (nsnull != view) {
nsCOMPtr<nsIViewManager> vm;
view->GetViewManager(*getter_AddRefs(vm));
vm->GetWidgetForView(view, getter_AddRefs(widget));
}
nsCOMPtr<nsIDeviceContext> dx;
nsIRenderingContext* result = nsnull;
rv = mPresContext->GetDeviceContext(getter_AddRefs(dx));
if (NS_SUCCEEDED(rv) && dx) {
if (nsnull != widget) {
rv = dx->CreateRenderingContext(widget.get(), 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 nsAString& aAnchorName, PRBool aScroll)
{
nsCOMPtr<nsIEventStateManager> esm;
mPresContext->GetEventStateManager(getter_AddRefs(esm));
if (aAnchorName.IsEmpty()) {
NS_ASSERTION(!aScroll, "can't scroll to empty anchor name");
if (esm) {
esm->SetContentState(nsnull, NS_EVENT_STATE_URLTARGET);
}
return NS_OK;
}
nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(mDocument);
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
// Search for an element with a matching "id" attribute
if (doc) {
nsCOMPtr<nsIDOMElement> element;
rv = doc->GetElementById(aAnchorName, getter_AddRefs(element));
if (NS_SUCCEEDED(rv) && element) {
// Get the nsIContent interface, because that's what we need to
// get the primary frame
content = do_QueryInterface(element);
}
}
// Search for an anchor element with a matching "name" attribute
if (!content && htmlDoc) {
nsCOMPtr<nsIDOMNodeList> list;
// Find a matching list of named nodes
rv = htmlDoc->GetElementsByName(aAnchorName, getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 count;
PRUint32 i;
list->GetLength(&count);
// Loop through the named nodes looking for the first anchor
for (i = 0; i < count; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (NS_FAILED(rv)) {
break;
}
// Ensure it's an anchor element
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
nsAutoString tagName;
if (element && NS_SUCCEEDED(element->GetTagName(tagName))) {
ToLowerCase(tagName);
if (tagName.Equals(NS_LITERAL_STRING("a"))) {
content = do_QueryInterface(element);
break;
}
}
}
}
}
// Search for anchor in the HTML namespace with a matching name
if (!content && !htmlDoc)
{
nsCOMPtr<nsIDOMNodeList> list;
NS_NAMED_LITERAL_STRING(nameSpace, "http://www.w3.org/1999/xhtml");
// Get the list of anchor elements
rv = doc->GetElementsByTagNameNS(nameSpace, NS_LITERAL_STRING("a"), getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 count;
PRUint32 i;
list->GetLength(&count);
// Loop through the named nodes looking for the first anchor
for (i = 0; i < count; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (NS_FAILED(rv)) {
break;
}
// Compare the name attribute
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
nsAutoString value;
if (element && NS_SUCCEEDED(element->GetAttribute(NS_LITERAL_STRING("name"), value))) {
if (value.Equals(aAnchorName)) {
content = do_QueryInterface(element);
break;
}
}
}
}
}
// Finally try FIXptr
nsCOMPtr<nsIDOMRange> jumpToRange;
if (!content) {
nsCOMPtr<nsIDOMXMLDocument> xmldoc = do_QueryInterface(mDocument);
if (xmldoc) {
xmldoc->EvaluateFIXptr(aAnchorName,getter_AddRefs(jumpToRange));
if (jumpToRange) {
nsCOMPtr<nsIDOMNode> node;
jumpToRange->GetStartContainer(getter_AddRefs(node));
if (node) {
node->QueryInterface(NS_GET_IID(nsIContent),getter_AddRefs(content));
}
}
}
}
if (esm) {
esm->SetContentState(content, NS_EVENT_STATE_URLTARGET);
}
if (content) {
// Get the primary frame
nsIFrame* frame = nsnull;
if (aScroll &&
NS_SUCCEEDED(GetPrimaryFrameFor(content, &frame)) &&
frame) {
rv = ScrollFrameIntoView(frame, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE);
if (NS_SUCCEEDED(rv)) {
// Should we select the target?
// This action is controlled by a preference: the default is to not select.
PRBool selectAnchor = PR_FALSE;
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefBranch) {
prefBranch->GetBoolPref("layout.selectanchor", &selectAnchor);
}
// Even if select anchor pref is false, we must still move the caret there.
// That way tabbing will start from the new location
if (!jumpToRange) {
jumpToRange = do_CreateInstance(kRangeCID);
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(content));
if (jumpToRange && node)
jumpToRange->SelectNode(node);
}
if (jumpToRange) {
if (!selectAnchor)
jumpToRange->Collapse(PR_TRUE);
SelectRange(jumpToRange);
}
if (esm) {
PRBool isSelectionWithFocus;
esm->MoveFocusToCaret(PR_TRUE, &isSelectionWithFocus);
}
}
}
} else {
rv = NS_ERROR_FAILURE; //changed to NS_OK in quirks mode if ScrollTo is called
// Scroll to the top/left if the anchor can not be
// found and it is labelled top (quirks mode only). @see bug 80784
nsCompatibility compatMode;
mPresContext->GetCompatibilityMode(&compatMode);
if ((NS_LossyConvertUCS2toASCII(aAnchorName).EqualsIgnoreCase("top")) &&
(compatMode == eCompatibility_NavQuirks)) {
rv = NS_OK;
// Check |aScroll| after setting |rv| so we set |rv| to the same
// thing whether or not |aScroll| is true.
if (aScroll && mViewManager) {
// Get the viewport scroller
nsIScrollableView* scrollingView;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
// Scroll to the top of the page
scrollingView->ScrollTo(0, 0, NS_VMREFRESH_IMMEDIATE);
}
}
}
}
return rv;
}
nsresult
PresShell::SelectRange(nsIDOMRange *aRange)
{
nsCOMPtr<nsISelection> sel;
nsresult rv = GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
if (NS_SUCCEEDED(rv) && sel) {
sel->RemoveAllRanges();
sel->AddRange(aRange);
}
return rv;
}
/**
* This function takes a scrolling view, a rect, and a scroll position and
* attempts to scroll that rect to that position in that view. The rect
* should be in the coordinate system of the _scrolled_ view.
*/
static void ScrollViewToShowRect(nsIScrollableView* aScrollingView,
nsRect & aRect,
PRIntn aVPercent,
PRIntn aHPercent)
{
// Determine the visible rect in the scrolling view's coordinate space.
// The size of the visible area is the clip view size
const nsIView* clipView;
nsRect visibleRect;
aScrollingView->GetClipView(&clipView);
clipView->GetBounds(visibleRect); // get width and height
aScrollingView->GetScrollPosition(visibleRect.x, visibleRect.y);
// The actual scroll offsets
nscoord scrollOffsetX = visibleRect.x;
nscoord scrollOffsetY = visibleRect.y;
nscoord lineHeight;
aScrollingView->GetLineHeight(&lineHeight);
// See how the rect 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 (aRect.y < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.YMost() > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) {
// Scroll only if no part of the frame is visible in this view
if (aRect.YMost() - lineHeight < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.y + lineHeight > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignY =
NSToCoordRound(aRect.y + aRect.height * (aVPercent / 100.0));
scrollOffsetY =
NSToCoordRound(frameAlignY - visibleRect.height * (aVPercent / 100.0));
}
// 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 (aRect.x < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.XMost() > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) {
// Scroll only if no part of the frame is visible in this view
// XXXbz using the line height here is odd, but there are no
// natural dimensions to use here, really....
if (aRect.XMost() - lineHeight < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.x + lineHeight > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignX =
NSToCoordRound(aRect.x + aRect.width * (aHPercent / 100.0));
scrollOffsetX =
NSToCoordRound(frameAlignX - visibleRect.width * (aHPercent / 100.0));
}
aScrollingView->ScrollTo(scrollOffsetX, scrollOffsetY,
NS_VMREFRESH_IMMEDIATE);
}
NS_IMETHODIMP
PresShell::ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const
{
if (!aFrame) {
return NS_ERROR_NULL_POINTER;
}
// Before we scroll the frame into view, ask the command dispatcher
// if we're resetting focus because a window just got an activate
// event. If we are, we do not want to scroll the frame into view.
// Example: The user clicks on an anchor, and then deactivates the
// window. When they reactivate the window, the expected behavior
// is not for the anchor link to scroll back into view. That is what
// this check is preventing.
// XXX: The dependency on the command dispatcher needs to be fixed.
nsCOMPtr<nsIContent> content;
aFrame->GetContent(getter_AddRefs(content));
if(content) {
nsCOMPtr<nsIDocument> document;
content->GetDocument(*getter_AddRefs(document));
if(document){
nsCOMPtr<nsIFocusController> focusController;
nsCOMPtr<nsIScriptGlobalObject> ourGlobal;
document->GetScriptGlobalObject(getter_AddRefs(ourGlobal));
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(ourGlobal);
if(ourWindow) {
ourWindow->GetRootFocusController(getter_AddRefs(focusController));
if (focusController) {
PRBool dontScroll;
focusController->GetSuppressFocusScroll(&dontScroll);
if(dontScroll)
return NS_OK;
}
}
}
}
// This is a two-step process.
// Step 1: Find the bounds of the rect we want to scroll into view. For
// example, for an inline frame we want to scroll in the whole line.
// Step 2: Walk the views that are parents of the frame and scroll them
// appropriately.
nsRect frameBounds;
aFrame->GetRect(frameBounds);
nsPoint offset;
nsIView* closestView;
aFrame->GetOffsetFromView(mPresContext, offset, &closestView);
frameBounds.MoveTo(offset);
// If this is an inline frame, we need to change the top of the
// bounds to include the whole line.
nsCOMPtr<nsIAtom> frameType;
nsIFrame *prevFrame = aFrame;
nsIFrame *frame = aFrame;
while (frame && (frame->GetFrameType(getter_AddRefs(frameType)),
frameType == nsLayoutAtoms::inlineFrame)) {
prevFrame = frame;
prevFrame->GetParent(&frame);
}
if (frame != aFrame &&
frame &&
frameType == nsLayoutAtoms::blockFrame) {
// find the line containing aFrame and increase the top of |offset|.
nsCOMPtr<nsILineIterator> lines( do_QueryInterface(frame) );
if (lines) {
PRInt32 index = -1;
lines->FindLineContaining(prevFrame, &index);
if (index >= 0) {
nsIFrame *trash1;
PRInt32 trash2;
nsRect lineBounds;
PRUint32 trash3;
if (NS_SUCCEEDED(lines->GetLine(index, &trash1, &trash2,
lineBounds, &trash3))) {
nsPoint blockOffset;
nsIView* blockView;
frame->GetOffsetFromView(mPresContext, blockOffset, &blockView);
if (blockView == closestView) {
// XXX If views not equal, this is hard. Do we want to bother?
nscoord newoffset = lineBounds.y + blockOffset.y;
if (newoffset < frameBounds.y)
frameBounds.y = newoffset;
}
}
}
}
}
#ifdef DEBUG
if (closestView) {
nsIScrollableView* _testView = nsnull;
CallQueryInterface(closestView, &_testView);
NS_ASSERTION(!_testView,
"What happened to the scrolled view? "
"The frame should not be directly in the scrolling view!");
}
#endif
// Walk up the view hierarchy. Make sure to add the view's position
// _after_ we get the parent and see whether it's scrollable. We want to
// make sure to get the scrolled view's position after it has been scrolled.
nsIScrollableView* scrollingView = nsnull;
while (closestView) {
nsIView* parent;
closestView->GetParent(parent);
if (parent) {
CallQueryInterface(parent, &scrollingView);
if (scrollingView) {
ScrollViewToShowRect(scrollingView, frameBounds, aVPercent, aHPercent);
}
}
nscoord x, y;
closestView->GetPosition(&x, &y);
frameBounds.MoveBy(x, y);
closestView = parent;
}
return NS_OK;
}
// GetLinkLocation: copy link location to clipboard
NS_IMETHODIMP PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString)
{
#ifdef DEBUG_dr
printf("dr :: PresShell::GetLinkLocation\n");
#endif
NS_ENSURE_ARG_POINTER(aNode);
nsresult rv;
nsAutoString anchorText;
static char strippedChars[] = {'\t','\r','\n'};
// are we an anchor?
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(aNode));
nsCOMPtr<nsIDOMHTMLAreaElement> area;
nsCOMPtr<nsIDOMHTMLLinkElement> link;
nsAutoString xlinkType;
if (anchor) {
rv = anchor->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// area?
area = do_QueryInterface(aNode);
if (area) {
rv = area->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// link?
link = do_QueryInterface(aNode);
if (link) {
rv = link->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// Xlink?
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aNode));
if (element) {
NS_NAMED_LITERAL_STRING(xlinkNS,"http://www.w3.org/1999/xlink");
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("type"),xlinkType);
if (xlinkType.Equals(NS_LITERAL_STRING("simple"))) {
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("href"),anchorText);
if (!anchorText.IsEmpty()) {
// Resolve the full URI using baseURI property
nsAutoString base;
nsCOMPtr<nsIDOM3Node> node(do_QueryInterface(aNode,&rv));
NS_ENSURE_SUCCESS(rv, rv);
node->GetBaseURI(base);
nsCOMPtr<nsIIOService>
ios(do_GetService("@mozilla.org/network/io-service;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> baseURI;
rv = ios->NewURI(NS_ConvertUCS2toUTF8(base),nsnull,nsnull,getter_AddRefs(baseURI));
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString spec;
rv = baseURI->Resolve(NS_ConvertUCS2toUTF8(anchorText),spec);
NS_ENSURE_SUCCESS(rv, rv);
anchorText = NS_ConvertUTF8toUCS2(spec);
}
}
}
}
}
}
if (anchor || area || link || xlinkType.Equals(NS_LITERAL_STRING("simple"))) {
//Remove all the '\t', '\r' and '\n' from 'anchorText'
anchorText.StripChars(strippedChars);
aLocationString = anchorText;
return NS_OK;
}
// if no link, fail.
return NS_ERROR_FAILURE;
}
// GetImageLocation: copy image location to clipboard
NS_IMETHODIMP PresShell::GetImageLocation(nsIDOMNode* aNode, nsAString& aLocationString)
{
#ifdef DEBUG_dr
printf("dr :: PresShell::GetImageLocation\n");
#endif
NS_ENSURE_ARG_POINTER(aNode);
nsresult rv;
// are we an image?
nsCOMPtr<nsIDOMHTMLImageElement> img(do_QueryInterface(aNode, &rv));
NS_ENSURE_SUCCESS(rv, rv);
return img->GetSrc(aLocationString);
}
// DoCopyImageContents: copy image contents to clipboard
NS_IMETHODIMP PresShell::DoCopyImageContents(nsIDOMNode* aNode)
{
// XXX dr: platform-specific widget code works on windows and mac.
// when linux copy image contents works, this should get written
// and hooked up to the front end, similarly to cmd_copyImageLocation.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
PresShell::DoCopy()
{
nsCOMPtr<nsIDocument> doc;
GetDocument(getter_AddRefs(doc));
if (!doc) return NS_ERROR_FAILURE;
nsresult rv;
nsCOMPtr<nsISelection> sel;
nsCOMPtr<nsIEventStateManager> manager;
nsCOMPtr<nsIContent> content;
rv = mPresContext->GetEventStateManager(getter_AddRefs(manager));
if (NS_FAILED(rv))
return rv;
if (!manager)
return NS_ERROR_FAILURE;
rv = manager->GetFocusedContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv) && content)
{
//check to see if we need to get selection from frame
//optimization that MAY need to be expanded as more things implement their own "selection"
nsCOMPtr<nsIDOMNSHTMLInputElement> htmlInputElement(do_QueryInterface(content));
nsCOMPtr<nsIDOMNSHTMLTextAreaElement> htmlTextAreaElement(do_QueryInterface(content));
if (htmlInputElement || htmlTextAreaElement)
{
nsIFrame *htmlInputFrame;
rv = GetPrimaryFrameFor(content, &htmlInputFrame);
if (NS_FAILED(rv))
return rv;
if (!htmlInputFrame)
return NS_ERROR_FAILURE;
nsCOMPtr<nsISelectionController> selCon;
rv = htmlInputFrame->GetSelectionController(mPresContext,getter_AddRefs(selCon));
if (NS_FAILED(rv))
return rv;
if (!selCon)
return NS_ERROR_FAILURE;
rv = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
}
}
if (!sel) //get selection from this PresShell
rv = GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
if (NS_FAILED(rv))
return rv;
if (!sel)
return NS_ERROR_FAILURE;
// Now we have the selection. Make sure it's nonzero:
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
// call the copy code
rv = nsCopySupport::HTMLCopy(sel, doc, nsIClipboard::kGlobalClipboard);
if (NS_FAILED(rv))
return rv;
// Now that we have copied, update the Paste menu item
nsCOMPtr<nsIScriptGlobalObject> globalObject;
doc->GetScriptGlobalObject(getter_AddRefs(globalObject));
nsCOMPtr<nsIDOMWindowInternal> domWindow = do_QueryInterface(globalObject);
if (domWindow)
{
domWindow->UpdateCommands(NS_LITERAL_STRING("clipboard"));
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPage)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
if (!historyState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState));
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
mHistoryState = getter_AddRefs(NS_GetWeakReference(historyState));
}
*aState = historyState;
NS_IF_ADDREF(*aState);
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = nsnull;
rv = GetRootFrame(&rootFrame);
if (NS_FAILED(rv) || nsnull == rootFrame) return rv;
// Capture frame state for the root scroll frame
// Don't capture state when first creating doc element heirarchy
// As the scroll position is 0 and this will cause us to loose
// our previously saved place!
if (aLeavingPage) {
nsIFrame* scrollFrame = nsnull;
rv = GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
rv = mFrameManager->CaptureFrameStateFor(mPresContext, scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState);
}
}
rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, historyState);
return rv;
}
NS_IMETHODIMP
PresShell::GetHistoryState(nsILayoutHistoryState** aState)
{
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
*aState = historyState;
NS_IF_ADDREF(*aState);
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState)
{
mHistoryState = getter_AddRefs(NS_GetWeakReference(aLayoutHistoryState));
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const
{
nsIFrame* primaryFrame;
nsresult rv = NS_OK;
// Initialize OUT parameter
*aIterator = nsnull;
// Get the primary frame associated with the content object
GetPrimaryFrameFor(aContent, &primaryFrame);
if (primaryFrame) {
// See whether it's a request for the before or after generated content
if (Before == aType) {
nsIFrame* beforeFrame = nsLayoutUtils::GetBeforeFrame(primaryFrame,
mPresContext);
if (beforeFrame) {
// Create an iterator
rv = NS_NewFrameContentIterator(mPresContext, beforeFrame, aIterator);
}
} else {
// Avoid finding the :after frame unless we need to (it's
// expensive). Instead probe for the existence of the pseudo-element
nsCOMPtr<nsIStyleContext> styleContext;
nsCOMPtr<nsIStyleContext> pseudoStyleContext;
primaryFrame->GetStyleContext(getter_AddRefs(styleContext));
mPresContext->ProbePseudoStyleContextFor(aContent,
nsCSSPseudoElements::after,
styleContext,
getter_AddRefs(pseudoStyleContext));
if (pseudoStyleContext) {
nsIFrame* afterFrame = nsLayoutUtils::GetAfterFrame(primaryFrame,
mPresContext);
if (afterFrame)
{
NS_ASSERTION(afterFrame->IsGeneratedContentFrame(),
"can't find generated content frame");
// Create an iterator
rv = NS_NewFrameContentIterator(mPresContext, afterFrame, aIterator);
}
}
}
}
return rv;
}
NS_IMETHODIMP
PresShell::SetAnonymousContentFor(nsIContent* aContent, nsISupportsArray* aAnonymousElements)
{
NS_PRECONDITION(aContent != nsnull, "null ptr");
if (! aContent)
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aAnonymousElements != nsnull, "null ptr");
if (! aAnonymousElements)
return NS_ERROR_NULL_POINTER;
if (! mAnonymousContentTable) {
mAnonymousContentTable = new nsSupportsHashtable;
if (! mAnonymousContentTable)
return NS_ERROR_OUT_OF_MEMORY;
}
nsISupportsKey key(aContent);
nsCOMPtr<nsISupportsArray> oldAnonymousElements =
getter_AddRefs(NS_STATIC_CAST(nsISupportsArray*, mAnonymousContentTable->Get(&key)));
if (oldAnonymousElements) {
// If we're trying to set anonymous content for an element that
// already had anonymous content, then we need to be sure to clean
// up after the old content. (This can happen, for example, when a
// reframe occurs.)
PRUint32 count;
oldAnonymousElements->Count(&count);
while (PRInt32(--count) >= 0) {
nsCOMPtr<nsISupports> isupports( getter_AddRefs(oldAnonymousElements->ElementAt(count)) );
nsCOMPtr<nsIContent> content( do_QueryInterface(isupports) );
NS_ASSERTION(content != nsnull, "not an nsIContent");
if (! content)
continue;
content->SetDocument(nsnull, PR_TRUE, PR_TRUE);
}
}
mAnonymousContentTable->Put(&key, aAnonymousElements);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetAnonymousContentFor(nsIContent* aContent, nsISupportsArray** aAnonymousElements)
{
if (! mAnonymousContentTable) {
*aAnonymousElements = nsnull;
return NS_OK;
}
nsISupportsKey key(aContent);
*aAnonymousElements =
NS_REINTERPRET_CAST(nsISupportsArray*, mAnonymousContentTable->Get(&key)); // addrefs
return NS_OK;
}
static PRBool PR_CALLBACK
ClearDocumentEnumerator(nsHashKey* aKey, void* aData, void* aClosure)
{
nsISupportsArray* anonymousElements =
NS_STATIC_CAST(nsISupportsArray*, aData);
PRUint32 count;
anonymousElements->Count(&count);
while (PRInt32(--count) >= 0) {
nsCOMPtr<nsISupports> isupports( getter_AddRefs(anonymousElements->ElementAt(count)) );
nsCOMPtr<nsIContent> content( do_QueryInterface(isupports) );
NS_ASSERTION(content != nsnull, "not an nsIContent");
if (! content)
continue;
content->SetDocument(nsnull, PR_TRUE, PR_TRUE);
}
return PR_TRUE;
}
NS_IMETHODIMP
PresShell::ReleaseAnonymousContent()
{
if (mAnonymousContentTable) {
mAnonymousContentTable->Enumerate(ClearDocumentEnumerator);
delete mAnonymousContentTable;
mAnonymousContentTable = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsPaintingSuppressed(PRBool* aResult)
{
*aResult = mPaintingSuppressed;
return NS_OK;
}
void
PresShell::UnsuppressAndInvalidate()
{
nsCOMPtr<nsIScriptGlobalObject> globalObject;
mDocument->GetScriptGlobalObject(getter_AddRefs(globalObject));
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(globalObject);
nsCOMPtr<nsIFocusController> focusController;
if (ourWindow)
ourWindow->GetRootFocusController(getter_AddRefs(focusController));
if (focusController)
// Suppress focus. The act of tearing down the old content viewer
// causes us to blur incorrectly.
focusController->SetSuppressFocus(PR_TRUE, "PresShell suppression on Web page loads");
nsCOMPtr<nsISupports> container;
mPresContext->GetContainer(getter_AddRefs(container));
if (container) {
nsCOMPtr<nsIDocShell> cvc(do_QueryInterface(container));
if (cvc) {
nsCOMPtr<nsIContentViewer> cv;
cvc->GetContentViewer(getter_AddRefs(cv));
if (cv) {
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
cv->Show();
// Calling |Show| may destroy us. Not sure why yet, but it's
// a smoketest blocker.
if (mIsDestroying)
return;
}
}
}
NS_ASSERTION(mFrameManager, "frameManager is already gone");
if (mFrameManager) {
mPaintingSuppressed = PR_FALSE;
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
nsRect rect;
rootFrame->GetRect(rect);
if (!rect.IsEmpty()) {
((nsFrame*)rootFrame)->Invalidate(mPresContext, rect, PR_FALSE);
}
}
}
if (ourWindow)
CheckForFocus(ourWindow, focusController, mDocument);
if (focusController) // Unsuppress now that we've shown the new window and focused it.
focusController->SetSuppressFocus(PR_FALSE, "PresShell suppression on Web page loads");
}
NS_IMETHODIMP
PresShell::UnsuppressPainting()
{
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
if (mIsDocumentGone || !mPaintingSuppressed)
return NS_OK;
// If we have reflows pending, just wait until we process
// the reflows and get all the frames where we want them
// before actually unlocking the painting. Otherwise
// go ahead and unlock now.
if (mReflowCommands.Count() > 0)
mShouldUnsuppressPainting = PR_TRUE;
else
UnsuppressAndInvalidate();
return NS_OK;
}
NS_IMETHODIMP
PresShell::DisableThemeSupport()
{
// Doesn't have to be dynamic. Just set the bool.
mIsThemeSupportDisabled = PR_TRUE;
return NS_OK;
}
PRBool
PresShell::IsThemeSupportEnabled()
{
return !mIsThemeSupportDisabled;
}
// Post a request to handle an arbitrary callback after reflow has finished.
NS_IMETHODIMP
PresShell::PostReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsCallbackEventRequest), &result);
request = (nsCallbackEventRequest*)result;
request->callback = aCallback;
NS_ADDREF(aCallback);
request->next = nsnull;
if (mLastCallbackEventRequest) {
mLastCallbackEventRequest = mLastCallbackEventRequest->next = request;
} else {
mFirstCallbackEventRequest = request;
mLastCallbackEventRequest = request;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* before = nsnull;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
if (callback == aCallback)
{
nsCallbackEventRequest* toFree = node;
if (node == mFirstCallbackEventRequest) {
mFirstCallbackEventRequest = node->next;
node = mFirstCallbackEventRequest;
before = nsnull;
} else {
node = node->next;
before->next = node;
}
FreeFrame(sizeof(nsCallbackEventRequest), toFree);
NS_RELEASE(callback);
} else {
before = node;
node = node->next;
}
}
return NS_OK;
}
/**
* Post a request to handle a DOM event after Reflow has finished.
* The event must have been created with the "new" operator.
*/
NS_IMETHODIMP
PresShell::PostDOMEvent(nsIContent* aContent, nsEvent* aEvent)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsDOMEventRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsDOMEventRequest), &result);
request = (nsDOMEventRequest*)result;
request->content = aContent;
NS_ADDREF(aContent);
request->event = aEvent;
request->next = nsnull;
if (mLastDOMEventRequest) {
mLastDOMEventRequest = mLastDOMEventRequest->next = request;
} else {
mFirstDOMEventRequest = request;
mLastDOMEventRequest = request;
}
return NS_OK;
}
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHODIMP
PresShell::PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsAttributeChangeRequest* request = nsnull;
void* result = nsnull;
AllocateFrame(sizeof(nsAttributeChangeRequest), &result);
request = (nsAttributeChangeRequest*)result;
request->content = aContent;
NS_ADDREF(aContent);
request->nameSpaceID = aNameSpaceID;
request->name = aName;
request->value = aValue;
request->notify = aNotify;
request->type = aType;
request->next = nsnull;
if (mLastAttributeRequest) {
mLastAttributeRequest = mLastAttributeRequest->next = request;
} else {
mFirstAttributeRequest = request;
mLastAttributeRequest = request;
}
return NS_OK;
}
void
PresShell::HandlePostedReflowCallbacks()
{
PRBool shouldFlush = PR_FALSE;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
nsCallbackEventRequest* toFree = node;
node = node->next;
mFirstCallbackEventRequest = node;
FreeFrame(sizeof(nsCallbackEventRequest), toFree);
if (callback)
callback->ReflowFinished(this, &shouldFlush);
NS_IF_RELEASE(callback);
}
mFirstCallbackEventRequest = mLastCallbackEventRequest = nsnull;
if (shouldFlush)
FlushPendingNotifications(PR_FALSE);
}
void
PresShell::HandlePostedDOMEvents()
{
while(mFirstDOMEventRequest)
{
/* pull the node from the event request list. Be prepared for reentrant access to the list
from within HandleDOMEvent and its callees! */
nsDOMEventRequest* node = mFirstDOMEventRequest;
nsEventStatus status = nsEventStatus_eIgnore;
mFirstDOMEventRequest = node->next;
if (nsnull == mFirstDOMEventRequest) {
mLastDOMEventRequest = nsnull;
}
node->content->HandleDOMEvent(mPresContext, node->event, nsnull, NS_EVENT_FLAG_INIT, &status);
NS_RELEASE(node->content);
delete node->event;
node->nsDOMEventRequest::~nsDOMEventRequest(); // doesn't do anything, but just in case
FreeFrame(sizeof(nsDOMEventRequest), node);
}
}
void
PresShell::HandlePostedAttributeChanges()
{
while(mFirstAttributeRequest)
{
/* pull the node from the request list. Be prepared for reentrant access to the list
from within SetAttribute/UnsetAttribute and its callees! */
nsAttributeChangeRequest* node = mFirstAttributeRequest;
mFirstAttributeRequest = node->next;
if (nsnull == mFirstAttributeRequest) {
mLastAttributeRequest = nsnull;
}
if (node->type == eChangeType_Set)
node->content->SetAttr(node->nameSpaceID, node->name, node->value, node->notify);
else
node->content->UnsetAttr(node->nameSpaceID, node->name, node->notify);
NS_RELEASE(node->content);
node->nsAttributeChangeRequest::~nsAttributeChangeRequest();
FreeFrame(sizeof(nsAttributeChangeRequest), node);
}
}
NS_IMETHODIMP
PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush)
{
aIsSafeToFlush = PR_TRUE;
if (mIsReflowing) {
// Not safe if we are reflowing
aIsSafeToFlush = PR_FALSE;
} else {
// Not safe if we are painting
nsCOMPtr<nsIViewManager> viewManager;
nsresult rv = GetViewManager(getter_AddRefs(viewManager));
if (NS_SUCCEEDED(rv) && (nsnull != viewManager)) {
PRBool isPainting = PR_FALSE;
viewManager->IsPainting(isPainting);
if (isPainting) {
aIsSafeToFlush = PR_FALSE;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::FlushPendingNotifications(PRBool aUpdateViews)
{
PRBool isSafeToFlush;
IsSafeToFlush(isSafeToFlush);
if (isSafeToFlush) {
if (aUpdateViews && mViewManager) {
mViewManager->BeginUpdateViewBatch();
}
ProcessReflowCommands(PR_FALSE);
if (aUpdateViews && mViewManager) {
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_IMMEDIATE);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsReflowLocked(PRBool* aIsReflowLocked)
{
*aIsReflowLocked = mIsReflowing;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginReflowBatching()
{
mBatchReflows = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndReflowBatching(PRBool aFlushPendingReflows)
{
nsresult rv = NS_OK;
mBatchReflows = PR_FALSE;
if (aFlushPendingReflows) {
rv = FlushPendingNotifications(PR_FALSE);
}
else {
PostReflowEvent();
}
return rv;
}
NS_IMETHODIMP
PresShell::GetReflowBatchingStatus(PRBool* aIsBatching)
{
*aIsBatching = mBatchReflows;
return NS_OK;
}
NS_IMETHODIMP
PresShell::ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentStatesChanged(mPresContext, aContent1,
aContent2, aStateMask);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
nsChangeHint aHint)
{
nsresult rv = NS_OK;
// XXXwaterson it might be more elegant to wait until after the
// initial reflow to begin observing the document. That would
// squelch any other inappropriate notifications as well.
if (mDidInitialReflow) {
WillCauseReflow();
rv = mStyleSet->AttributeChanged(mPresContext, aContent, aNameSpaceID, aAttribute, aModType, aHint);
VERIFY_STYLE_TREE;
DidCauseReflow();
}
return rv;
}
NS_IMETHODIMP
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
WillCauseReflow();
MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_START(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchEnable,mStyleSet);
nsresult rv = mStyleSet->ContentAppended(mPresContext, aContainer, aNewIndexInContainer);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
CtlStyleWatch(kStyleWatchDisable,mStyleSet);
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
WillCauseReflow();
nsresult rv = mStyleSet->ContentInserted(mPresContext, aContainer, aChild, aIndexInContainer);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentReplaced(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
// Notify the ESM that the content has been removed, so that
// it can clean up any state related to the content.
nsCOMPtr<nsIEventStateManager> esm;
mPresContext->GetEventStateManager(getter_AddRefs(esm));
if (esm)
esm->ContentRemoved(aOldChild);
WillCauseReflow();
nsresult rv = mStyleSet->ContentReplaced(mPresContext, aContainer, aOldChild,
aNewChild, aIndexInContainer);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
// Notify the ESM that the content has been removed, so that
// it can clean up any state related to the content.
nsCOMPtr<nsIEventStateManager> esm;
mPresContext->GetEventStateManager(getter_AddRefs(esm));
if (esm)
esm->ContentRemoved(aChild);
WillCauseReflow();
nsresult rv = mStyleSet->ContentRemoved(mPresContext, aContainer,
aChild, aIndexInContainer);
// If we have no root content node at this point, be sure to reset
// mDidInitialReflow to PR_FALSE, this will allow InitialReflow()
// to be called again should a new root node be inserted for this
// presShell. (Bug 167355)
if (mDocument) {
nsCOMPtr<nsIContent> rootContent;
mDocument->GetRootContent(getter_AddRefs(rootContent));
if (!rootContent) {
mDidInitialReflow = PR_FALSE;
}
}
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
nsresult
PresShell::ReconstructFrames(void)
{
nsresult rv = NS_OK;
WillCauseReflow();
rv = mStyleSet->ReconstructDocElementHierarchy(mPresContext);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
/*
* It's better to add stuff to the |DidSetStyleContext| method of the
* relevant frames than adding it here. These methods should (ideally,
* anyway) go away.
*/
// Return value says whether to walk children.
typedef PRBool (* PR_CALLBACK frameWalkerFn)(nsIFrame *aFrame, void *aClosure);
PR_STATIC_CALLBACK(PRBool)
BuildFramechangeList(nsIFrame *aFrame, void *aClosure)
{
nsStyleChangeList *changeList = NS_STATIC_CAST(nsStyleChangeList*, aClosure);
// Ok, get our binding information.
const nsStyleDisplay* oldDisplay;
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)oldDisplay);
if (!oldDisplay->mBinding.IsEmpty()) {
// We had a binding.
nsCOMPtr<nsIContent> content;
aFrame->GetContent(getter_AddRefs(content));
nsCOMPtr<nsIDocument> doc;
content->GetDocument(*getter_AddRefs(doc));
if (doc) {
nsCOMPtr<nsIBindingManager> bm;
doc->GetBindingManager(getter_AddRefs(bm));
nsCOMPtr<nsIXBLBinding> binding;
bm->GetBinding(content, getter_AddRefs(binding));
PRBool marked = PR_FALSE;
binding->MarkedForDeath(&marked);
if (marked) {
// Add in a change to process, thus ensuring this binding gets rebuilt.
changeList->AppendChange(aFrame, content, NS_STYLE_HINT_FRAMECHANGE);
return PR_FALSE;
}
}
}
return PR_TRUE;
}
PR_STATIC_CALLBACK(PRBool)
ReResolveMenusAndTrees(nsIFrame *aFrame, void *aClosure)
{
// Trees have a special style cache that needs to be flushed when
// the theme changes.
nsCOMPtr<nsITreeBoxObject> treeBox(do_QueryInterface(aFrame));
if (treeBox)
treeBox->ClearStyleAndImageCaches();
// We deliberately don't re-resolve style on a menu's popup
// sub-content, since doing so slows menus to a crawl. That means we
// have to special-case them on a skin switch, and ensure that the
// popup frames just get destroyed completely.
nsCOMPtr<nsIMenuFrame> menuFrame(do_QueryInterface(aFrame));
if (menuFrame) {
menuFrame->UngenerateMenu();
menuFrame->OpenMenu(PR_FALSE);
}
return PR_TRUE;
}
static void
WalkFramesThroughPlaceholders(nsIPresContext *aPresContext, nsIFrame *aFrame,
frameWalkerFn aFunc, void *aClosure)
{
PRBool walkChildren = (*aFunc)(aFrame, aClosure);
if (!walkChildren)
return;
PRInt32 listIndex = 0;
nsCOMPtr<nsIAtom> childList;
do {
nsIFrame *child = nsnull;
aFrame->FirstChild(aPresContext, childList, &child);
while (child) {
nsFrameState state;
child->GetFrameState(&state);
if (!(state & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
nsCOMPtr<nsIAtom> frameType;
child->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::placeholderFrame == frameType) { // placeholder
// get out of flow frame and recur there
nsIFrame* outOfFlowFrame =
NS_STATIC_CAST(nsPlaceholderFrame*, child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
WalkFramesThroughPlaceholders(aPresContext, outOfFlowFrame,
aFunc, aClosure);
}
else
WalkFramesThroughPlaceholders(aPresContext, child, aFunc, aClosure);
}
child->GetNextSibling(&child);
}
aFrame->GetAdditionalChildListName(listIndex++, getter_AddRefs(childList));
} while (childList);
}
NS_IMETHODIMP
PresShell::ReconstructStyleData(PRBool aRebuildRuleTree)
{
nsIFrame* rootFrame;
GetRootFrame(&rootFrame);
if (!rootFrame)
return NS_OK;
nsCOMPtr<nsIStyleSet> set;
GetStyleSet(getter_AddRefs(set));
if (!set)
return NS_OK;
nsCOMPtr<nsIStyleFrameConstruction> cssFrameConstructor;
set->GetStyleFrameConstruction(getter_AddRefs(cssFrameConstructor));
if (!cssFrameConstructor)
return NS_OK;
nsCOMPtr<nsIFrameManager> frameManager;
GetFrameManager(getter_AddRefs(frameManager));
// Now handle some of our more problematic widgets (and also deal with
// skin XBL changing).
nsStyleChangeList changeList;
if (aRebuildRuleTree) {
// Handle those widgets that have special style contexts cached
// that will point to invalid rule nodes following a rule tree
// reconstruction.
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
&BuildFramechangeList, &changeList);
cssFrameConstructor->ProcessRestyledFrames(changeList, mPresContext);
changeList.Clear();
// Now do a complete re-resolve of our style tree.
set->BeginRuleTreeReconstruct();
}
nsChangeHint frameChange = NS_STYLE_HINT_NONE;
frameManager->ComputeStyleChangeFor(mPresContext, rootFrame,
kNameSpaceID_Unknown, nsnull,
changeList, NS_STYLE_HINT_NONE, frameChange);
if (frameChange & nsChangeHint_ReconstructDoc)
set->ReconstructDocElementHierarchy(mPresContext);
else {
cssFrameConstructor->ProcessRestyledFrames(changeList, mPresContext);
if (aRebuildRuleTree) {
GetRootFrame(&rootFrame);
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
&ReResolveMenusAndTrees, nsnull);
}
}
if (aRebuildRuleTree)
set->EndRuleTreeReconstruct();
VERIFY_STYLE_TREE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
// We only care when enabled sheets are added
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable) {
// If style information is being added, we don't need to rebuild the
// rule tree, since no rule nodes have been rendered invalid by the
// addition of new rule content.
return ReconstructStyleData(PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
// We only care when enabled sheets are removed
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable) {
// XXXdwh We'd like to be able to use ReconstructStyleData in all the
// other style sheet calls, but it doesn't quite work because of HTML tables.
return ReconstructStyleData(PR_TRUE);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::StyleSheetApplicableStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aApplicable)
{
// first notify the style set that a sheet's state has changed
if (mStyleSet) {
nsresult rv = mStyleSet->NotifyStyleSheetStateChanged(aApplicable);
if (NS_FAILED(rv))
return rv;
}
// We don't need to rebuild the
// rule tree, since no rule nodes have been rendered invalid by the
// addition of new rule content. They can simply lurk in the tree
// until the stylesheet is enabled once more.
return ReconstructStyleData(PR_FALSE);
}
NS_IMETHODIMP
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
nsChangeHint aHint)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleChanged(mPresContext, aStyleSheet,
aStyleRule, aHint);
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
NS_IMETHODIMP
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleAdded(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
DidCauseReflow();
if (NS_FAILED(rv)) {
return rv;
}
// We don't need to rebuild the
// rule tree, since no rule nodes have been rendered invalid by the
// addition of new rule content.
return ReconstructStyleData(PR_FALSE);
}
NS_IMETHODIMP
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
WillCauseReflow();
nsresult rv = mStyleSet->StyleRuleRemoved(mPresContext, aStyleSheet,
aStyleRule);
VERIFY_STYLE_TREE;
DidCauseReflow();
if (NS_FAILED(rv)) {
return rv;
}
// XXX For now reconstruct everything
return ReconstructFrames();
}
NS_IMETHODIMP
PresShell::DocumentWillBeDestroyed(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aResult) const
{
nsresult rv;
if (mFrameManager) {
rv = mFrameManager->GetPrimaryFrameFor(aContent, aResult);
} else {
*aResult = nsnull;
rv = NS_OK;
}
return rv;
}
NS_IMETHODIMP
PresShell::GetStyleContextFor(nsIFrame* aFrame,
nsIStyleContext** aStyleContext) const
{
if (!aFrame || !aStyleContext) {
return NS_ERROR_NULL_POINTER;
}
return (aFrame->GetStyleContext(aStyleContext));
}
NS_IMETHODIMP
PresShell::GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const
{
nsresult result = NS_ERROR_NULL_POINTER;
if ((nsnull!=aResult) && (nsnull!=aContent))
{
*aResult = nsnull;
nsIFrame *primaryFrame=nsnull;
result = GetPrimaryFrameFor(aContent, &primaryFrame);
if ((NS_SUCCEEDED(result)) && (nsnull!=primaryFrame))
{
result = primaryFrame->QueryInterface(NS_GET_IID(nsISupports),
(void**)aResult);
}
}
return result;
}
NS_IMETHODIMP
PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
if (!mFrameManager) {
*aResult = nsnull;
return NS_OK;
}
return mFrameManager->GetPlaceholderFrameFor(aFrame, aResult);
}
#ifdef IBMBIDI
NS_IMETHODIMP
PresShell::SetCaretBidiLevel(PRUint8 aLevel)
{
// If the current level is undefined, we have just inserted new text.
// In this case, we don't want to reset the keyboard language
PRBool afterInsert = mBidiLevel & BIDI_LEVEL_UNDEFINED;
mBidiLevel = aLevel;
// PRBool parityChange = ((mBidiLevel ^ aLevel) & 1); // is the parity of the new level different from the current level?
// if (parityChange) // if so, change the keyboard language
if (mBidiKeyboard && !afterInsert)
mBidiKeyboard->SetLangFromBidiLevel(aLevel);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetCaretBidiLevel(PRUint8 *aOutLevel)
{
if (!aOutLevel) { return NS_ERROR_INVALID_ARG; }
*aOutLevel = mBidiLevel;
return NS_OK;
}
NS_IMETHODIMP
PresShell::UndefineCaretBidiLevel()
{
mBidiLevel |= BIDI_LEVEL_UNDEFINED;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BidiStyleChangeReflow()
{
// Have the root frame's style context remap its style
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
if (rootFrame) {
mStyleSet->ClearStyleData(mPresContext, nsnull, nsnull);
ReconstructFrames();
}
return NS_OK;
}
#endif // IBMBIDI
//nsIViewObserver
// Return TRUE if any clipping is to be done.
static PRBool ComputeClipRect(nsIFrame* aFrame, nsRect& aResult) {
const nsStyleDisplay* display;
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
// 'clip' only applies to absolutely positioned elements, and is
// relative to the element's border edge. 'clip' applies to the entire
// element: border, padding, and content areas, and even scrollbars if
// there are any.
if (display->IsAbsolutelyPositioned() && (display->mClipFlags & NS_STYLE_CLIP_RECT)) {
nsSize size;
// Start with the 'auto' values and then factor in user specified values
aFrame->GetSize(size);
nsRect clipRect(0, 0, size.width, size.height);
if (display->mClipFlags & NS_STYLE_CLIP_RECT) {
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
clipRect.y = display->mClip.y;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
clipRect.x = display->mClip.x;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
clipRect.width = display->mClip.width;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
clipRect.height = display->mClip.height;
}
}
aResult = clipRect;
return PR_TRUE;
}
return PR_FALSE;
}
// If the element is absolutely positioned and has a specified clip rect
// then it pushes the current rendering context and sets the clip rect.
// Returns PR_TRUE if the clip rect is set and PR_FALSE otherwise
static PRBool
SetClipRect(nsIRenderingContext& aRenderingContext, nsIFrame* aFrame)
{
nsRect clipRect;
if (ComputeClipRect(aFrame, clipRect)) {
// Set updated clip-rect into the rendering context
PRBool clipState;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
return PR_TRUE;
}
return PR_FALSE;
}
static PRBool
InClipRect(nsIFrame* aFrame, nsPoint& aEventPoint)
{
nsRect clipRect;
if (ComputeClipRect(aFrame, clipRect)) {
return clipRect.Contains(aEventPoint);
} else {
return PR_TRUE;
}
}
NS_IMETHODIMP
PresShell::Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
void* clientData;
nsIFrame* frame;
nsresult rv = NS_OK;
if (mIsDestroying) {
NS_ASSERTION(PR_FALSE, "A paint message was dispatched to a destroyed PresShell");
return NS_OK;
}
NS_ASSERTION(!(nsnull == aView), "null view");
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
if (nsnull != frame)
{
mCaret->EraseCaret();
//StCaretHider caretHider(mCaret); // stack-based class hides caret until dtor.
// If the frame is absolutely positioned, then the 'clip' property
// applies
PRBool setClipRect = SetClipRect(aRenderingContext, frame);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_BACKGROUND);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FLOATERS);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FOREGROUND);
if (setClipRect) {
PRBool clipState;
aRenderingContext.PopState(clipState);
}
#ifdef NS_DEBUG
// Draw a border around the frame
if (nsIFrameDebug::GetShowFrameBorders()) {
nsRect r;
frame->GetRect(r);
aRenderingContext.SetColor(NS_RGB(0,0,255));
aRenderingContext.DrawRect(0, 0, r.width, r.height);
}
// Draw a border around the current event target
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) && (aView == mCurrentTargetView)) {
aRenderingContext.SetColor(NS_RGB(128,0,128));
aRenderingContext.DrawRect(mCurrentTargetRect.x, mCurrentTargetRect.y, mCurrentTargetRect.width, mCurrentTargetRect.height);
}
#endif
}
return rv;
}
nsIFrame*
PresShell::GetCurrentEventFrame()
{
if (!mCurrentEventFrame && mCurrentEventContent) {
// Make sure the content still has a document reference. If not,
// then we assume it is no longer in the content tree and the
// frame shouldn't get an event, nor should we even assume its
// safe to try and find the frame.
nsCOMPtr<nsIDocument> doc;
nsresult result = mCurrentEventContent->GetDocument(*getter_AddRefs(doc));
if (NS_SUCCEEDED(result) && doc) {
GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame);
}
}
return mCurrentEventFrame;
}
NS_IMETHODIMP
PresShell::GetEventTargetFrame(nsIFrame** aFrame)
{
*aFrame = GetCurrentEventFrame();
return NS_OK;
}
void
PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent)
{
if (mCurrentEventFrame || mCurrentEventContent) {
mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0);
mCurrentEventContentStack.InsertElementAt((void*)mCurrentEventContent, 0);
}
mCurrentEventFrame = aFrame;
mCurrentEventContent = aContent;
NS_IF_ADDREF(aContent);
}
void
PresShell::PopCurrentEventInfo()
{
mCurrentEventFrame = nsnull;
NS_IF_RELEASE(mCurrentEventContent);
if (0 != mCurrentEventFrameStack.Count()) {
mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
mCurrentEventContent = (nsIContent*)mCurrentEventContentStack.ElementAt(0);
mCurrentEventContentStack.RemoveElementAt(0);
}
}
PRBool PresShell::InZombieDocument(nsIContent *aContent)
{
// If a content node points to a null document, it is possibly in a
// zombie document, about to be replaced by a newly loading document.
// Such documents cannot handle DOM events.
// It might actually be in a node not attached to any document,
// in which case there is not parent presshell to retarget it to.
nsCOMPtr<nsIDocument> doc;
mCurrentEventContent->GetDocument(*getter_AddRefs(doc));
return !doc;
}
nsresult PresShell::RetargetEventToParent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled,
nsIContent* aZombieFocusedContent)
{
// Send this events straight up to the parent pres shell.
// We do this for non-mouse events in zombie documents.
// That way at least the UI key bindings can work.
// First, eliminate the focus ring in the current docshell, which
// is now a zombie. If we key navigate, it won't be within this
// docshell, until the newly loading document is displayed.
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
nsCOMPtr<nsIEventStateManager> esm;
mPresContext->GetEventStateManager(getter_AddRefs(esm));
if (esm) {
esm->SetContentState(nsnull, NS_EVENT_STATE_FOCUS);
esm->SetFocusedContent(nsnull);
ContentStatesChanged(mDocument, aZombieFocusedContent, nsnull, NS_EVENT_STATE_FOCUS);
}
// Next, update the display so the old focus ring is no longer visible
nsCOMPtr<nsISupports> container;
mPresContext->GetContainer(getter_AddRefs(container));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
NS_ASSERTION(docShell, "No docshell for container.");
nsCOMPtr<nsIContentViewer> contentViewer;
docShell->GetContentViewer(getter_AddRefs(contentViewer));
if (contentViewer) {
nsCOMPtr<nsIContentViewer> zombieViewer;
contentViewer->GetPreviousViewer(getter_AddRefs(zombieViewer));
if (zombieViewer) {
zombieViewer->Show();
}
}
// Now, find the parent pres shell and send the event there
nsCOMPtr<nsIDocShellTreeItem> treeItem =
do_QueryInterface(container);
NS_ASSERTION(treeItem, "No tree item for container.");
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
treeItem->GetParent(getter_AddRefs(parentTreeItem));
nsCOMPtr<nsIDocShell> parentDocShell =
do_QueryInterface(parentTreeItem);
if (!parentDocShell || treeItem == parentTreeItem) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIPresShell> parentPresShell;
parentDocShell->GetPresShell(getter_AddRefs(parentPresShell));
nsCOMPtr<nsIViewObserver> parentViewObserver =
do_QueryInterface(parentPresShell);
if (!parentViewObserver) {
return NS_ERROR_FAILURE;
}
PopCurrentEventInfo();
return parentViewObserver->HandleEvent(aView, aEvent,
aEventStatus,
aForceHandle,
aHandled);
}
NS_IMETHODIMP
PresShell::HandleEvent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled)
{
void* clientData;
nsIFrame* frame;
nsresult rv = NS_OK;
NS_ASSERTION(!(nsnull == aView), "null view");
aHandled = PR_TRUE;
if (mIsDestroying || mIsReflowing) {
return NS_OK;
}
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT)
return HandleEventInternal(aEvent, aView, NS_EVENT_FLAG_INIT, aEventStatus);
#endif
// Check for a theme change up front, since the frame type is irrelevant
if (aEvent->message == NS_THEMECHANGED && mPresContext)
return mPresContext->ThemeChanged();
// Check for a system color change up front, since the frame type is irrelevenat
if ((aEvent->message == NS_SYSCOLORCHANGED) && mPresContext) {
nsIViewManager *vm;
if ((NS_SUCCEEDED(GetViewManager(&vm))) && vm) {
// Only dispatch system color change when the message originates from
// from the root views widget. This is necessary to prevent us from
// dispatching the SysColorChanged notification for each child window
// which may be redundant.
nsIView *view;
vm->GetRootView(view);
if (view == aView) {
aHandled = PR_TRUE;
*aEventStatus = nsEventStatus_eConsumeDoDefault;
return mPresContext->SysColorChanged();
}
}
return NS_OK;
}
// We really don't want to just drop a focus event on the floor here,
// because the widget-level focus change will have already happened
// by the time we get the event. Rather than dropping it, manually
// update the focus controller here.
if (aEvent->message == NS_GOTFOCUS && !mDidInitialReflow && mDocument) {
nsCOMPtr<nsIScriptGlobalObject> sgo;
mDocument->GetScriptGlobalObject(getter_AddRefs(sgo));
if (sgo) {
nsCOMPtr<nsPIDOMWindow> pWindow = do_QueryInterface(sgo);
if (pWindow) {
nsCOMPtr<nsIFocusController> controller;
pWindow->GetRootFocusController(getter_AddRefs(controller));
if (controller) {
nsCOMPtr<nsIDOMWindowInternal> domWin = do_QueryInterface(sgo);
controller->SetFocusedWindow(domWin);
controller->SetFocusedElement(nsnull);
}
}
}
}
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
/* if (mSelection && aEvent->eventStructType == NS_KEY_EVENT)
{//KEY HANDLERS WILL GET RID OF THIS
if (mSelectionFlags && NS_SUCCEEDED(mSelection->HandleKeyEvent(mPresContext, aEvent)))
{
return NS_OK;
}
}
*/
if (nsnull != frame) {
PushCurrentEventInfo(nsnull, nsnull);
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager)) {
//change 6-01-00 mjudge,ftang adding ime as an event that needs focused element
if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent) || aEvent->message == NS_CONTEXTMENU_KEY) {
//Key events go to the focused frame, not point based.
manager->GetFocusedContent(&mCurrentEventContent);
if (mCurrentEventContent)
GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame);
else {
#if defined(MOZ_X11)
if (NS_IS_IME_EVENT(aEvent)) {
// bug 52416
// Lookup region (candidate window) of UNIX IME grabs
// input focus from Mozilla but wants to send IME event
// to redraw pre-edit (composed) string
// If Mozilla does not have input focus and event is IME,
// sends IME event to pre-focused element
nsCOMPtr<nsIScriptGlobalObject> ourGlobal;
mDocument->GetScriptGlobalObject(getter_AddRefs(ourGlobal));
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(ourGlobal);
if (ourWindow) {
nsCOMPtr<nsIFocusController> focusController;
ourWindow->GetRootFocusController(getter_AddRefs(focusController));
if (focusController) {
PRBool active = PR_FALSE;
// check input focus is in Mozilla
focusController->GetActive(&active);
if (!active) {
// if not, search for pre-focused element
nsCOMPtr<nsIDOMElement> focusedElement;
focusController->GetFocusedElement(getter_AddRefs(focusedElement));
if (focusedElement) {
// get mCurrentEventContent from focusedElement
CallQueryInterface(focusedElement, &mCurrentEventContent);
}
}
}
}
}
if (!mCurrentEventContent) {
// fallback, call existing codes
mDocument->GetRootContent(&mCurrentEventContent);
}
#else /* defined(MOZ_X11) */
mDocument->GetRootContent(&mCurrentEventContent);
#endif /* defined(MOZ_X11) */
mCurrentEventFrame = nsnull;
}
if (mCurrentEventContent && InZombieDocument(mCurrentEventContent)) {
return RetargetEventToParent(aView, aEvent, aEventStatus,
aForceHandle, aHandled, mCurrentEventContent);
}
}
else if (!InClipRect(frame, aEvent->point)) {
// we only check for the clip rect on this frame ... all frames with clip have views so any
// viewless children of this frame cannot have clip. Furthermore if the event is not in the clip
// for this frame, then none of the children can get it either.
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
rv = NS_OK;
} else {
// aEvent->point is relative to aView's upper left corner. We need
// a point that is in the same coordinate system as frame's rect
// so that the frame->mRect.Contains(aPoint) calls in
// GetFrameForPoint() work. The assumption here is that frame->GetView()
// will return aView, and frame's parent view is aView's parent.
nsPoint eventPoint;
frame->GetOrigin(eventPoint);
eventPoint += aEvent->point;
nsPoint originOffset;
nsIView *view = nsnull;
frame->GetOriginToViewOffset(mPresContext, originOffset, &view);
#ifdef DEBUG_kin
NS_ASSERTION(view == aView, "view != aView");
#endif // DEBUG_kin
if (view == aView)
eventPoint -= originOffset;
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FOREGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_FLOATERS, &mCurrentEventFrame);
if (rv != NS_OK) {
rv = frame->GetFrameForPoint(mPresContext, eventPoint, NS_FRAME_PAINT_LAYER_BACKGROUND, &mCurrentEventFrame);
if (rv != NS_OK) {
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
rv = NS_OK;
}
}
}
if (mCurrentEventFrame) {
// Bug 103055, bug 185889: mouse events apply to *elements*, not all
// nodes.
// We use weak pointers because during this tight loop, the node will
// *not* go away. And this happens on every mousemove.
//
// Get the nearest element parent
nsCOMPtr<nsIContent> targetElement;
mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetElement));
while (targetElement &&
!targetElement->IsContentOfType(nsIContent::eELEMENT)) {
nsIContent* temp = targetElement;
temp->GetParent(*getter_AddRefs(targetElement));
}
// If we found an element, target it. Otherwise, target *nothing*.
if (!targetElement) {
NS_IF_RELEASE(mCurrentEventContent);
mCurrentEventFrame = nsnull;
} else if (targetElement != mCurrentEventContent) {
NS_IF_RELEASE(mCurrentEventContent);
mCurrentEventContent = targetElement;
NS_ADDREF(mCurrentEventContent);
// XXX we leave the frame the same as it was so that the text frame
// will receive the event
}
}
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aView, NS_EVENT_FLAG_INIT, aEventStatus);
}
NS_RELEASE(manager);
}
#ifdef NS_DEBUG
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) && (GetCurrentEventFrame())) {
nsIView *oldView = mCurrentTargetView;
nsPoint offset(0,0);
nsRect oldTargetRect(mCurrentTargetRect);
mCurrentEventFrame->GetRect(mCurrentTargetRect);
mCurrentEventFrame->GetView(mPresContext, &mCurrentTargetView);
if ( ! mCurrentTargetView ) {
mCurrentEventFrame->GetOffsetFromView(mPresContext, offset, &mCurrentTargetView);
}
if (mCurrentTargetView) {
mCurrentTargetRect.x = offset.x;
mCurrentTargetRect.y = offset.y;
// use aView or mCurrentTargetView??
if ( (mCurrentTargetRect != oldTargetRect) || (mCurrentTargetView != oldView)) {
nsIViewManager *vm;
if ((NS_OK == GetViewManager(&vm)) && vm) {
vm->UpdateView(mCurrentTargetView,mCurrentTargetRect,0);
if (oldView)
vm->UpdateView(oldView,oldTargetRect,0);
NS_IF_RELEASE(vm);
}
}
}
}
#endif
PopCurrentEventInfo();
}
else {
aHandled = PR_FALSE;
rv = NS_OK;
}
return rv;
}
NS_IMETHODIMP
PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(aFrame, aContent);
ret = HandleEventInternal(aEvent, nsnull, aFlags, aStatus);
PopCurrentEventInfo();
return NS_OK;
}
nsresult
PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView, PRUint32 aFlags, nsEventStatus* aStatus)
{
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT)
{
void* clientData;
aView->GetClientData(clientData);
nsIFrame* frame = (nsIFrame *)clientData;
if (!frame)
return NS_ERROR_FAILURE;
return frame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent, aStatus);
}
#endif
nsresult rv = NS_OK;
nsIEventStateManager *manager;
if (NS_OK == mPresContext->GetEventStateManager(&manager) && GetCurrentEventFrame()) {
//1. Give event to event manager for pre event state changes and generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus, aView);
//2. Give event to the DOM for third party and JS use.
if ((GetCurrentEventFrame()) && NS_OK == rv) {
if (mCurrentEventContent) {
rv = mCurrentEventContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
}
else {
nsIContent* targetContent;
if (NS_OK == mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent, &targetContent) && nsnull != targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
NS_RELEASE(targetContent);
}
}
//Continue with second dispatch to system event handlers.
// Need to null check mCurrentEventContent and mCurrentEventFrame
// since the previous dispatch could have nuked them.
if (mCurrentEventContent) {
rv = mCurrentEventContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags | NS_EVENT_FLAG_SYSTEM_EVENT, aStatus);
}
else if (mCurrentEventFrame) {
nsIContent* targetContent;
if (NS_OK == mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent, &targetContent) && nsnull != targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags | NS_EVENT_FLAG_SYSTEM_EVENT, aStatus);
NS_RELEASE(targetContent);
}
}
//3. Give event to the Frames for browser default processing.
// XXX The event isn't translated into the local coordinate space
// of the frame...
if (GetCurrentEventFrame() && NS_OK == rv && aEvent->eventStructType != NS_EVENT) {
rv = mCurrentEventFrame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent, aStatus);
}
//4. Give event to event manager for post event state changes and generation of synthetic events.
if ((GetCurrentEventFrame()) && NS_OK == rv) {
rv = manager->PostHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus, aView);
}
}
NS_RELEASE(manager);
}
return rv;
}
// Dispatch event to content only (NOT full processing)
// See also HandleEventWithTarget which does full event processing.
NS_IMETHODIMP
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(nsnull, aTargetContent);
// Bug 41013: Check if the event should be dispatched to content.
// It's possible that we are in the middle of destroying the window
// and the js context is out of date. This check detects the case
// that caused a crash in bug 41013, but there may be a better way
// to handle this situation!
nsCOMPtr<nsISupports> container;
ret = mPresContext->GetContainer(getter_AddRefs(container));
if (NS_SUCCEEDED(ret) && container) {
// Dispatch event to content
ret = aTargetContent->HandleDOMEvent(mPresContext, aEvent, nsnull, NS_EVENT_FLAG_INIT, aStatus);
}
PopCurrentEventInfo();
return NS_OK;
}
NS_IMETHODIMP
PresShell::Scrolled(nsIView *aView)
{
void* clientData;
nsIFrame* frame;
nsresult rv;
NS_ASSERTION(!(nsnull == aView), "null view");
aView->GetClientData(clientData);
frame = (nsIFrame *)clientData;
if (nsnull != frame)
rv = frame->Scrolled(aView);
else
rv = NS_OK;
return rv;
}
NS_IMETHODIMP
PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight)
{
return ResizeReflow(aWidth, aHeight);
}
//--------------------------------------------------------
// Start of protected and private methods on the PresShell
//--------------------------------------------------------
//-------------- Begin Reflow Event Definition ------------------------
struct ReflowEvent : public PLEvent {
ReflowEvent(nsIPresShell* aPresShell);
~ReflowEvent() { }
void HandleEvent() {
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", (void*)presShell.get(), (void*)this);
}
#endif
// XXX Statically cast the pres shell pointer so that we can call
// protected methods on the pres shell. (the ReflowEvent struct
// is a friend of the PresShell class)
PresShell* ps = NS_REINTERPRET_CAST(PresShell*, presShell.get());
PRBool isBatching;
ps->ClearReflowEventStatus();
ps->GetReflowBatchingStatus(&isBatching);
if (!isBatching) {
nsCOMPtr<nsIViewManager> viewManager;
// Set a kung fu death grip on the view manager associated with the pres shell
// before processing that pres shell's reflow commands. Fixes bug 54868.
presShell->GetViewManager(getter_AddRefs(viewManager));
ps->ProcessReflowCommands(PR_TRUE);
// Now, explicitly release the pres shell before the view manager
presShell = nsnull;
viewManager = nsnull;
}
}
else
mPresShell = 0;
}
nsWeakPtr mPresShell;
};
static void PR_CALLBACK HandlePLEvent(ReflowEvent* aEvent)
{
aEvent->HandleEvent();
}
static void PR_CALLBACK DestroyPLEvent(ReflowEvent* aEvent)
{
delete aEvent;
}
ReflowEvent::ReflowEvent(nsIPresShell* aPresShell)
{
NS_ASSERTION(aPresShell, "Null parameters!");
mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell));
PL_InitEvent(this, aPresShell,
(PLHandleEventProc) ::HandlePLEvent,
(PLDestroyEventProc) ::DestroyPLEvent);
}
//-------------- End Reflow Event Definition ---------------------------
void
PresShell::PostReflowEvent()
{
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (eventQueue != mReflowEventQueue &&
!mIsReflowing && mReflowCommands.Count() > 0) {
ReflowEvent* ev = new ReflowEvent(NS_STATIC_CAST(nsIPresShell*, this));
eventQueue->PostEvent(ev);
mReflowEventQueue = eventQueue;
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", (void*)this, (void*)ev);
}
#endif
}
}
nsresult
PresShell::WillCauseReflow()
{
mViewManager->CacheWidgetChanges(PR_TRUE);
return NS_OK;
}
nsresult
PresShell::DidCauseReflow()
{
if (mViewManager) {
mViewManager->CacheWidgetChanges(PR_FALSE);
}
// We may have had more reflow commands appended to the queue during
// our reflow. Make sure these get processed at some point.
if (!gAsyncReflowDuringDocLoad && mDocumentLoading) {
FlushPendingNotifications(PR_FALSE);
} else {
PostReflowEvent();
}
return NS_OK;
}
nsresult
PresShell::ProcessReflowCommands(PRBool aInterruptible)
{
MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_START(mReflowWatch);
if (0 != mReflowCommands.Count()) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsIRenderingContext* rcx;
nsIFrame* rootFrame;
mFrameManager->GetRootFrame(&rootFrame);
nsSize maxSize;
rootFrame->GetSize(maxSize);
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
#ifdef DEBUG
if (GetVerifyReflowEnable()) {
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: begin incremental reflow\n");
}
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
PRInt32 i, n = mReflowCommands.Count();
printf("\nPresShell::ProcessReflowCommands: this=%p, count=%d\n", (void*)this, n);
for (i = 0; i < n; i++) {
nsHTMLReflowCommand* rc = (nsHTMLReflowCommand*)
mReflowCommands.ElementAt(i);
rc->List(stdout);
}
}
#endif
// If reflow is interruptible, then make a note of our deadline.
PRIntervalTime deadline;
if (aInterruptible)
deadline = PR_IntervalNow() + PR_MicrosecondsToInterval(gMaxRCProcessingTime);
mIsReflowing = PR_TRUE;
do {
// Coalesce the reflow commands into a tree.
IncrementalReflow reflow;
for (PRInt32 i = mReflowCommands.Count() - 1; i >= 0; --i) {
nsHTMLReflowCommand *command =
NS_STATIC_CAST(nsHTMLReflowCommand *, mReflowCommands[i]);
if (reflow.AddCommand(mPresContext, command)) {
// Remove the command from the queue.
mReflowCommands.RemoveElementAt(i);
ReflowCommandRemoved(command);
}
else {
// The reflow command couldn't be added to the tree; leave
// it in the queue, and we'll handle it next time.
#ifdef DEBUG
printf("WARNING: Couldn't add reflow command, so splitting.\n");
#endif
}
}
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("Incremental reflow tree:\n");
reflow.Dump(mPresContext);
}
#endif
// Dispatch an incremental reflow.
reflow.Dispatch(mPresContext, desiredSize, maxSize, *rcx);
// Keep going until we're out of reflow commands, or we've run
// past our deadline.
} while (mReflowCommands.Count() &&
(!aInterruptible || PR_IntervalNow() < deadline));
// XXXwaterson for interruptible reflow, examine the tree and
// re-enqueue any unflowed reflow targets.
mIsReflowing = PR_FALSE;
NS_IF_RELEASE(rcx);
// If any new reflow commands were enqueued during the reflow,
// schedule another reflow event to process them.
if (mReflowCommands.Count())
PostReflowEvent();
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n", (void*)this);
}
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE);
mInVerifyReflow = PR_TRUE;
PRBool ok = VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: finished (%s)\n",
ok ? "ok" : "failed");
}
if (0 != mReflowCommands.Count()) {
printf("XXX yikes! reflow commands queued during verify-reflow\n");
}
}
#endif
// If there are no more reflow commands in the queue, we'll want
// to remove the ``dummy request''.
DoneRemovingReflowCommands();
}
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
HandlePostedDOMEvents();
HandlePostedAttributeChanges();
HandlePostedReflowCallbacks();
if (mShouldUnsuppressPainting && mReflowCommands.Count() == 0) {
// We only unlock if we're out of reflows. It's pointless
// to unlock if reflows are still pending, since reflows
// are just going to thrash the frames around some more. By
// waiting we avoid an overeager "jitter" effect.
mShouldUnsuppressPainting = PR_FALSE;
UnsuppressAndInvalidate();
}
return NS_OK;
}
nsresult
PresShell::ClearReflowEventStatus()
{
mReflowEventQueue = nsnull;
return NS_OK;
}
nsresult
PresShell::CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult)
{
nsresult rv;
nsCOMPtr<nsIStyleSet> clone(do_CreateInstance(kStyleSetCID,&rv));
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->GetNumberOfUserStyleSheets();
for (i = 0; i < n; i++) {
nsIStyleSheet* ss;
ss = aSet->GetUserStyleSheetAt(i);
if (nsnull != ss) {
clone->AppendUserStyleSheet(ss);
NS_RELEASE(ss);
}
}
n = aSet->GetNumberOfAgentStyleSheets();
for (i = 0; i < n; i++) {
nsIStyleSheet* ss;
ss = aSet->GetAgentStyleSheetAt(i);
if (nsnull != ss) {
clone->AppendAgentStyleSheet(ss);
NS_RELEASE(ss);
}
}
*aResult = clone.get();
NS_ADDREF(*aResult);
return NS_OK;
}
nsresult
PresShell::ReflowCommandAdded(nsHTMLReflowCommand* aRC)
{
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
if (mDocumentLoading) {
PRInt32 flags;
aRC->GetFlags(&flags);
flags |= NS_RC_CREATED_DURING_DOCUMENT_LOAD;
aRC->SetFlags(flags);
mRCCreatedDuringLoad++;
#ifdef PR_LOGGING
if (PR_LOG_TEST(gLog, PR_LOG_DEBUG)) {
nsIFrame* target;
aRC->GetTarget(target);
nsCOMPtr<nsIAtom> type;
target->GetFrameType(getter_AddRefs(type));
NS_ASSERTION(type, "frame didn't override GetFrameType()");
nsAutoString typeStr(NS_LITERAL_STRING("unknown"));
if (type)
type->ToString(typeStr);
PR_LOG(gLog, PR_LOG_DEBUG,
("presshell=%p, ReflowCommandAdded(%p) target=%p[%s] mRCCreatedDuringLoad=%d\n",
this, aRC, target, NS_ConvertUCS2toUTF8(typeStr).get(), mRCCreatedDuringLoad));
}
#endif
if (!mDummyLayoutRequest) {
AddDummyLayoutRequest();
}
}
}
return NS_OK;
}
nsresult
PresShell::ReflowCommandRemoved(nsHTMLReflowCommand* aRC)
{
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
PRInt32 flags;
aRC->GetFlags(&flags);
if (flags & NS_RC_CREATED_DURING_DOCUMENT_LOAD) {
mRCCreatedDuringLoad--;
PR_LOG(gLog, PR_LOG_DEBUG,
("presshell=%p, ReflowCommandRemoved(%p) mRCCreatedDuringLoad=%d\n",
this, aRC, mRCCreatedDuringLoad));
}
}
return NS_OK;
}
void
PresShell::DoneRemovingReflowCommands()
{
if (mRCCreatedDuringLoad == 0 && mDummyLayoutRequest && !mIsReflowing) {
RemoveDummyLayoutRequest();
}
}
nsresult
PresShell::AddDummyLayoutRequest(void)
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad && !mIsReflowing) {
rv = nsDummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), this);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument) {
rv = mDocument->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv)) return rv;
}
if (loadGroup) {
rv = mDummyLayoutRequest->SetLoadGroup(loadGroup);
if (NS_FAILED(rv)) return rv;
rv = loadGroup->AddRequest(mDummyLayoutRequest, nsnull);
if (NS_FAILED(rv)) return rv;
PR_LOG(gLog, PR_LOG_ALWAYS,
("presshell=%p, Added dummy layout request %p", this, mDummyLayoutRequest.get()));
}
}
return rv;
}
nsresult
PresShell::RemoveDummyLayoutRequest(void)
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad) {
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument) {
rv = mDocument->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv)) return rv;
}
if (loadGroup && mDummyLayoutRequest) {
rv = loadGroup->RemoveRequest(mDummyLayoutRequest, nsnull, NS_OK);
if (NS_FAILED(rv)) return rv;
PR_LOG(gLog, PR_LOG_ALWAYS,
("presshell=%p, Removed dummy layout request %p", this, mDummyLayoutRequest.get()));
mDummyLayoutRequest = nsnull;
}
}
return rv;
}
//------------------------------------------------------
// End of protected and private methods on the PresShell
//------------------------------------------------------
// Start of DEBUG only code
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIScrollableView.h"
#include "nsIDeviceContext.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_CID(kScrollingViewCID, NS_SCROLLING_VIEW_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
printf(" != ");
if (nsnull != k2) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
printf(" %s", aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsRect& r1, const nsRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k1);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != \n");
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k2);
}
printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static PRBool
CompareTrees(nsIPresContext* aFirstPresContext, nsIFrame* aFirstFrame,
nsIPresContext* aSecondPresContext, nsIFrame* aSecondFrame)
{
if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame)
return PR_TRUE;
PRBool ok = PR_TRUE;
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* k1, *k2;
aFirstFrame->FirstChild(aFirstPresContext, listName, &k1);
aSecondFrame->FirstChild(aSecondPresContext, listName, &k2);
PRInt32 l1 = nsContainerFrame::LengthOf(k1);
PRInt32 l2 = nsContainerFrame::LengthOf(k2);
if (l1 != l2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
nsRect r1, r2;
nsIView* v1, *v2;
nsCOMPtr<nsIWidget> w1;
nsCOMPtr<nsIWidget> w2;
for (;;) {
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child lists are different\n");
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
k1->GetRect(r1);
k2->GetRect(r2);
if (r1 != r2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "(frame rects)", r1, r2);
}
// Make sure either both have views or neither have views; if they
// do have views, make sure the views are the same size. If the
// views have widgets, make sure they both do or neither does. If
// they do, make sure the widgets are the same size.
k1->GetView(aFirstPresContext, &v1);
k2->GetView(aSecondPresContext, &v2);
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child views are not matched\n");
}
else if (nsnull != v1) {
v1->GetBounds(r1);
v2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(view rects)", r1, r2);
}
v1->GetWidget(*getter_AddRefs(w1));
v2->GetWidget(*getter_AddRefs(w2));
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
}
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
// verify that neither frame has a space manager,
// or they both do and the space managers are equivalent
nsCOMPtr<nsIFrameManager>fm1;
nsCOMPtr<nsIPresShell> ps1;
nsSpaceManager *sm1;
aFirstPresContext->GetShell(getter_AddRefs(ps1));
NS_ASSERTION(ps1, "no pres shell for primary tree!");
ps1->GetFrameManager(getter_AddRefs(fm1));
NS_ASSERTION(fm1, "no frame manager for primary tree!");
fm1->GetFrameProperty((nsIFrame*)k1, nsLayoutAtoms::spaceManagerProperty,
0, (void **)&sm1);
// look at the test frame
nsCOMPtr<nsIFrameManager>fm2;
nsCOMPtr<nsIPresShell> ps2;
nsSpaceManager *sm2;
aSecondPresContext->GetShell(getter_AddRefs(ps2));
NS_ASSERTION(ps2, "no pres shell for test tree!");
ps2->GetFrameManager(getter_AddRefs(fm2));
NS_ASSERTION(fm2, "no frame manager for test tree!");
fm2->GetFrameProperty((nsIFrame*)k2, nsLayoutAtoms::spaceManagerProperty,
0, (void **)&sm2);
// now compare the space managers
if (((nsnull == sm1) && (nsnull != sm2)) ||
((nsnull != sm1) && (nsnull == sm2))) { // one is null, and the other is not
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "space managers are not matched\n");
}
else if (sm1 && sm2) { // both are not null, compare them
// first, compare yMost
nscoord yMost1, yMost2;
nsresult smresult = sm1->YMost(yMost1);
if (NS_ERROR_ABORT != smresult)
{
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
smresult = sm2->YMost(yMost2);
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
if (yMost1 != yMost2) {
LogVerifyMessage(k1, k2, "yMost of space managers differs\n");
}
// now compare bands by sampling
PRInt32 yIncrement = yMost1/100;
if (0==yIncrement) {
yIncrement = 1; // guarantee we make progress in the loop below
}
nscoord yOffset = 0;
for ( ; ok && yOffset < yMost1; yOffset += yIncrement)
{
nscoord small=5, large=100;
nsBandData band1, band2;
nsBandTrapezoid trap1[20], trap2[20];
band1.mSize = band2.mSize = 20;
band1.mTrapezoids = trap1;
band2.mTrapezoids = trap2;
sm1->GetBandData(yOffset, nsSize(small,small), band1);
sm2->GetBandData(yOffset, nsSize(small,small), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ;trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
// test the larger maxSize
sm1->GetBandData(yOffset, nsSize(large,large), band1);
sm2->GetBandData(yOffset, nsSize(large,large), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ; trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
}
}
}
// Compare the sub-trees too
if (!CompareTrees(aFirstPresContext, k1, aSecondPresContext, k2)) {
ok = PR_FALSE;
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
// Advance to next sibling
k1->GetNextSibling(&k1);
k2->GetNextSibling(&k2);
}
else {
break;
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
NS_IF_RELEASE(listName);
nsIAtom* listName1;
nsIAtom* listName2;
aFirstFrame->GetAdditionalChildListName(listIndex, &listName1);
aSecondFrame->GetAdditionalChildListName(listIndex, &listName2);
listIndex++;
if (listName1 != listName2) {
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
ok = PR_FALSE;
}
LogVerifyMessage(k1, k2, "child list names are not matched: ");
nsAutoString tmp;
if (nsnull != listName1) {
listName1->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf(" != ");
if (nsnull != listName2) {
listName2->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf("\n");
NS_IF_RELEASE(listName1);
NS_IF_RELEASE(listName2);
break;
}
NS_IF_RELEASE(listName2);
listName = listName1;
} while (ok && (listName != nsnull));
return ok;
}
#endif
#if 0
static nsIFrame*
FindTopFrame(nsIFrame* aRoot)
{
if (nsnull != aRoot) {
nsIContent* content;
aRoot->GetContent(&content);
if (nsnull != content) {
nsIAtom* tag;
content->GetTag(tag);
if (nsnull != tag) {
NS_RELEASE(tag);
NS_RELEASE(content);
return aRoot;
}
NS_RELEASE(content);
}
// Try one of the children
nsIFrame* kid;
aRoot->FirstChild(nsnull, &kid);
while (nsnull != kid) {
nsIFrame* result = FindTopFrame(kid);
if (nsnull != result) {
return result;
}
kid->GetNextSibling(&kid);
}
}
return nsnull;
}
#endif
#ifdef DEBUG
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
PRBool
PresShell::VerifyIncrementalReflow()
{
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Building Verification Tree...\n");
}
// All the stuff we are creating that needs releasing
nsIPresContext* cx;
nsIViewManager* vm;
nsIPresShell* sh;
// Create a presentation context to view the new frame tree
nsresult rv;
PRBool isPaginated = PR_FALSE;
mPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
nsCOMPtr<nsIPrintPreviewContext> ppx = do_CreateInstance(kPrintPreviewContextCID, &rv);
if (NS_SUCCEEDED(rv)) {
ppx->QueryInterface(NS_GET_IID(nsIPresContext),(void**)&cx);
}
}
else {
rv = NS_NewGalleyContext(&cx);
}
nsISupports* container;
if (NS_SUCCEEDED(mPresContext->GetContainer(&container)) &&
(nsnull != container)) {
cx->SetContainer(container);
nsILinkHandler* lh;
if (NS_SUCCEEDED(container->QueryInterface(NS_GET_IID(nsILinkHandler),
(void**)&lh))) {
cx->SetLinkHandler(lh);
NS_RELEASE(lh);
}
NS_RELEASE(container);
}
NS_ASSERTION(NS_OK == rv, "failed to create presentation context");
nsCOMPtr<nsIDeviceContext> dc;
mPresContext->GetDeviceContext(getter_AddRefs(dc));
cx->Init(dc);
// Get our scrolling preference
nsScrollPreference scrolling;
nsIView* rootView;
mViewManager->GetRootView(rootView);
nsIScrollableView* scrollView;
rv = rootView->QueryInterface(NS_GET_IID(nsIScrollableView),
(void**)&scrollView);
if (NS_OK == rv) {
scrollView->GetScrollPreference(scrolling);
}
nsCOMPtr<nsIWidget> rootWidget;
rootView->GetWidget(*getter_AddRefs(rootWidget));
void* nativeParentWidget = rootWidget->GetNativeData(NS_NATIVE_WIDGET);
// Create a new view manager.
rv = nsComponentManager::CreateInstance(kViewManagerCID, nsnull,
NS_GET_IID(nsIViewManager),
(void**) &vm);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to create view manager");
}
rv = vm->Init(dc);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to init view manager");
}
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds;
mPresContext->GetVisibleArea(tbounds);
nsIView* view;
rv = nsComponentManager::CreateInstance(kViewCID, nsnull,
NS_GET_IID(nsIView),
(void **) &view);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to create scroll view");
}
rv = view->Init(vm, tbounds, nsnull);
if (NS_FAILED(rv)) {
NS_ASSERTION(NS_OK == rv, "failed to init scroll view");
}
//now create the widget for the view
rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget);
if (NS_OK != rv) {
NS_ASSERTION(NS_OK == rv, "failed to create scroll view widget");
}
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
// Make the new presentation context the same size as our
// presentation context.
nsRect r;
mPresContext->GetVisibleArea(r);
cx->SetVisibleArea(r);
// Create a new presentation shell to view the document. Use the
// exact same style information that this document has.
nsCOMPtr<nsIStyleSet> newSet;
rv = CloneStyleSet(mStyleSet, getter_AddRefs(newSet));
NS_ASSERTION(NS_SUCCEEDED(rv), "failed to clone style set");
rv = mDocument->CreateShell(cx, vm, newSet, &sh);
sh->SetVerifyReflowEnable(PR_FALSE); // turn off verify reflow while we're reflowing the test frame tree
NS_ASSERTION(NS_OK == rv, "failed to create presentation shell");
vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh));
sh->InitialReflow(r.width, r.height);
sh->SetVerifyReflowEnable(PR_TRUE); // turn on verify reflow again now that we're done reflowing the test frame tree
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Verification Tree built, comparing...\n");
}
// Now that the document has been reflowed, use its frame tree to
// compare against our frame tree.
nsIFrame* root1;
GetRootFrame(&root1);
nsIFrame* root2;
sh->GetRootFrame(&root2);
PRBool ok = CompareTrees(mPresContext, root1, cx, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(root1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
printf("Verification tree:\n");
if (NS_SUCCEEDED(root2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
}
cx->SetContainer(nsnull);
NS_RELEASE(cx);
sh->EndObservingDocument();
NS_RELEASE(sh);
NS_RELEASE(vm);
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Finished Verifying Reflow...\n");
}
return ok;
}
#endif
// PresShellViewEventListener
NS_IMPL_ISUPPORTS2(PresShellViewEventListener, nsIScrollPositionListener, nsICompositeListener)
PresShellViewEventListener::PresShellViewEventListener()
{
mPresShell = 0;
mWasVisible = PR_FALSE;
mCallCount = 0;
}
PresShellViewEventListener::~PresShellViewEventListener()
{
mPresShell = 0;
}
nsresult
PresShellViewEventListener::SetPresShell(nsIPresShell *aPresShell)
{
mPresShell = aPresShell;
return NS_OK;
}
nsresult
PresShellViewEventListener::HideCaret()
{
nsresult result = NS_OK;
if (mPresShell && 0 == mCallCount)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
{
result = selCon->GetCaretEnabled(&mWasVisible);
if (NS_SUCCEEDED(result) && mWasVisible)
result = selCon->SetCaretEnabled(PR_FALSE);
}
}
++mCallCount;
return result;
}
nsresult
PresShellViewEventListener::RestoreCaretVisibility()
{
nsresult result = NS_OK;
--mCallCount;
if (mPresShell && 0 == mCallCount && mWasVisible)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
result = selCon->SetCaretEnabled(PR_TRUE);
}
return result;
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return RestoreCaretVisibility();
}
NS_IMETHODIMP
PresShellViewEventListener::WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
nsCSSRendering::DidPaint();
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)
{
nsCSSRendering::DidPaint();
return RestoreCaretVisibility();
}
// Enable, Disable and Print, Start, Stop and/or Reset the StyleSet watch
/*static*/
nsresult CtlStyleWatch(PRUint32 aCtlValue, nsIStyleSet *aStyleSet)
{
NS_ASSERTION(aStyleSet!=nsnull,"aStyleSet cannot be null in CtlStyleWatch");
nsresult rv = NS_OK;
#ifdef MOZ_PERF_METRICS
if (aStyleSet != nsnull){
nsCOMPtr<nsITimeRecorder> watch = do_QueryInterface(aStyleSet, &rv);
if (NS_SUCCEEDED(rv) && watch) {
if (aCtlValue & kStyleWatchEnable){
watch->EnableTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchDisable){
watch->DisableTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchPrint){
watch->PrintTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchStart){
watch->StartTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchStop){
watch->StopTimer(NS_TIMER_STYLE_RESOLUTION);
}
if (aCtlValue & kStyleWatchReset){
watch->ResetTimer(NS_TIMER_STYLE_RESOLUTION);
}
}
}
#endif
return rv;
}
//=============================================================
//=============================================================
//-- Debug Reflow Counts
//=============================================================
//=============================================================
#ifdef MOZ_REFLOW_PERF
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::DumpReflows()
{
if (mReflowCountMgr) {
nsCAutoString uriStr;
if (mDocument) {
nsCOMPtr<nsIURI> uri;
mDocument->GetDocumentURL(getter_AddRefs(uri));
if (uri) {
uri->GetPath(uriStr);
}
}
mReflowCountMgr->DisplayTotals(uriStr.get());
mReflowCountMgr->DisplayHTMLTotals(uriStr.get());
mReflowCountMgr->DisplayDiffsInTotals("Differences");
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame)
{
if (mReflowCountMgr) {
mReflowCountMgr->Add(aName, (nsReflowReason)aType, aFrame);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsIPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor)
{
if (mReflowCountMgr) {
mReflowCountMgr->PaintCount(aName, aRenderingContext, aPresContext, aFrame, aColor);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::SetPaintFrameCount(PRBool aPaintFrameCounts)
{
if (mReflowCountMgr) {
mReflowCountMgr->SetPaintFrameCounts(aPaintFrameCounts);
}
return NS_OK;
}
//------------------------------------------------------------------
//-- Reflow Counter Classes Impls
//------------------------------------------------------------------
//------------------------------------------------------------------
ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) :
mMgr(aMgr)
{
ClearTotals();
SetTotalsCache();
}
//------------------------------------------------------------------
ReflowCounter::~ReflowCounter()
{
}
//------------------------------------------------------------------
void ReflowCounter::ClearTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mTotals[i] = 0;
}
}
//------------------------------------------------------------------
void ReflowCounter::SetTotalsCache()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::CalcDiffInTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i] - mCacheTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(const char * aStr)
{
DisplayTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayDiffTotals(const char * aStr)
{
DisplayTotals(mCacheTotals, aStr?aStr:"Diff Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(const char * aStr)
{
DisplayHTMLTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
printf("%25s\t", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
printf("%d\t", aArray[i]);
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
printf("%d\n", total);
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
FILE * fd = mMgr->GetOutFile();
if (!fd) {
return;
}
fprintf(fd, "<tr><td><center>%s</center></td>", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
fprintf(fd, "<td><center>");
if (aArray[i]) {
fprintf(fd, "%d", aArray[i]);
} else {
fprintf(fd, "&nbsp;");
}
fprintf(fd, "</center></td>");
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
fprintf(fd, "<td><center>%d</center></td></tr>\n", total);
}
//------------------------------------------------------------------
//-- ReflowCountMgr
//------------------------------------------------------------------
ReflowCountMgr::ReflowCountMgr()
{
mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mIndiFrameCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mCycledOnce = PR_FALSE;
mDumpFrameCounts = PR_FALSE;
mDumpFrameByFrameCounts = PR_FALSE;
mPaintFrameByFrameCounts = PR_FALSE;
}
//------------------------------------------------------------------
ReflowCountMgr::~ReflowCountMgr()
{
CleanUp();
}
//------------------------------------------------------------------
ReflowCounter * ReflowCountMgr::LookUp(const char * aName)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
return counter;
}
return nsnull;
}
//------------------------------------------------------------------
void ReflowCountMgr::Add(const char * aName, nsReflowReason aType, nsIFrame * aFrame)
{
NS_ASSERTION(aName != nsnull, "Name shouldn't be null!");
if (mDumpFrameCounts && nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
if (counter == nsnull) {
counter = new ReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
char * name = nsCRT::strdup(aName);
NS_ASSERTION(name != nsnull, "null ptr");
PL_HashTableAdd(mCounts, name, counter);
}
counter->Add(aType);
}
if ((mDumpFrameByFrameCounts || mPaintFrameByFrameCounts) &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter == nsnull) {
counter = new IndiReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
counter->mFrame = aFrame;
counter->mName.AssignWithConversion(aName);
PL_HashTableAdd(mIndiFrameCounts, key, counter);
}
// this eliminates extra counts from super classes
if (counter != nsnull && counter->mName.EqualsWithConversion(aName)) {
counter->mCount++;
counter->mCounter.Add(aType, 1);
}
}
}
//------------------------------------------------------------------
void ReflowCountMgr::PaintCount(const char * aName,
nsIRenderingContext* aRenderingContext,
nsIPresContext* aPresContext,
nsIFrame* aFrame,
PRUint32 aColor)
{
if (mPaintFrameByFrameCounts &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter != nsnull && counter->mName.EqualsWithConversion(aName)) {
aRenderingContext->PushState();
nsFont font("Times", NS_FONT_STYLE_NORMAL,NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL,0,NSIntPointsToTwips(8));
nsCOMPtr<nsIFontMetrics> fm;
aPresContext->GetMetricsFor(font, getter_AddRefs(fm));
aRenderingContext->SetFont(fm);
char buf[16];
sprintf(buf, "%d", counter->mCount);
nscoord x = 0, y;
nscoord width, height;
aRenderingContext->GetWidth((char*)buf, width);
fm->GetHeight(height);
fm->GetMaxAscent(y);
nsRect r;
aFrame->GetRect(r);
PRUint32 color;
PRUint32 color2;
if (aColor != 0) {
color = aColor;
color2 = NS_RGB(0,0,0);
} else {
PRUint8 rc,gc,bc = 0;
if (counter->mCount < 5) {
rc = 255;
gc = 255;
} else if ( counter->mCount < 11) {
gc = 255;
} else {
rc = 255;
}
color = NS_RGB(rc,gc,bc);
color2 = NS_RGB(rc/2,gc/2,bc/2);
}
nsRect rect(0,0, width+15, height+15);
aRenderingContext->SetColor(NS_RGB(0,0,0));
aRenderingContext->FillRect(rect);
aRenderingContext->SetColor(color2);
aRenderingContext->DrawString(buf, strlen(buf), x+15,y+15);
aRenderingContext->SetColor(color);
aRenderingContext->DrawString(buf, strlen(buf), x,y);
PRBool clipEmpty;
aRenderingContext->PopState(clipEmpty);
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
delete counter;
delete [] str;
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
delete counter;
delete [] str;
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
void ReflowCountMgr::CleanUp()
{
if (nsnull != mCounts) {
PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull);
PL_HashTableDestroy(mCounts);
mCounts = nsnull;
}
if (nsnull != mIndiFrameCounts) {
PL_HashTableEnumerateEntries(mIndiFrameCounts, RemoveIndiItems, nsnull);
PL_HashTableDestroy(mIndiFrameCounts);
mIndiFrameCounts = nsnull;
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
printf("\t\t\t");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+1;i++) {
printf("\t%s", title[i]);
}
printf("\n");
for (i=0;i<78;i++) {
printf("-");
}
printf("\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this);
}
}
static void RecurseIndiTotals(nsIPresContext* aPresContext,
PLHashTable * aHT,
nsIFrame * aParentFrame,
PRInt32 aLevel)
{
if (aParentFrame == nsnull) {
return;
}
char key[16];
sprintf(key, "%p", (void*)aParentFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(aHT, key);
if (counter) {
counter->mHasBeenOutput = PR_TRUE;
char * name = ToNewCString(counter->mName);
for (PRInt32 i=0;i<aLevel;i++) printf(" ");
printf("%s - %p [%d][", name, (void*)aParentFrame, counter->mCount);
for (PRInt32 inx=0;inx<5;inx++) {
if (inx != 0) printf(",");
printf("%d", counter->mCounter.GetTotalByType(nsReflowReason(inx)));
}
printf("]\n");
nsMemory::Free(name);
}
nsIFrame * child;
aParentFrame->FirstChild(aPresContext, nsnull, &child);
while (child) {
RecurseIndiTotals(aPresContext, aHT, child, aLevel+1);
child->GetNextSibling(&child);
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg)
{
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
if (counter && !counter->mHasBeenOutput) {
char * name = ToNewCString(counter->mName);
printf("%s - %p [%d][", name, (void*)counter->mFrame, counter->mCount);
for (PRInt32 inx=0;inx<5;inx++) {
if (inx != 0) printf(",");
printf("%d", counter->mCounter.GetTotalByType(nsReflowReason(inx)));
}
printf("]\n");
nsMemory::Free(name);
}
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoIndiTotalsTree()
{
if (nsnull != mCounts) {
printf("\n------------------------------------------------\n");
printf("-- Individual Frame Counts\n");
printf("------------------------------------------------\n");
if (mPresShell) {
nsIFrame * rootFrame;
mPresShell->GetRootFrame(&rootFrame);
RecurseIndiTotals(mPresContext, mIndiFrameCounts, rootFrame, 0);
printf("------------------------------------------------\n");
printf("-- Individual Counts of Frames not in Root Tree\n");
printf("------------------------------------------------\n");
PL_HashTableEnumerateEntries(mIndiFrameCounts, DoSingleIndi, this);
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayHTMLTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandHTMLTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Class", "Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
fprintf(mFD, "<tr>");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+2;i++) {
fprintf(mFD, "<td><center><b>%s<b></center></td>", title[i]);
}
fprintf(mFD, "</tr>\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this);
}
}
//------------------------------------
void ReflowCountMgr::DisplayTotals(const char * aStr)
{
#ifdef DEBUG_rods
printf("%s\n", aStr?aStr:"No name");
#endif
if (mDumpFrameCounts) {
DoGrandTotals();
}
if (mDumpFrameByFrameCounts) {
DoIndiTotalsTree();
}
}
//------------------------------------
void ReflowCountMgr::DisplayHTMLTotals(const char * aStr)
{
#ifdef WIN32x // XXX NOT XP!
char name[1024];
char * sptr = strrchr(aStr, '/');
if (sptr) {
sptr++;
strcpy(name, sptr);
char * eptr = strrchr(name, '.');
if (eptr) {
*eptr = 0;
}
strcat(name, "_stats.html");
}
mFD = fopen(name, "w");
if (mFD) {
fprintf(mFD, "<html><head><title>Reflow Stats</title></head><body>\n");
const char * title = aStr?aStr:"No name";
fprintf(mFD, "<center><b>%s</b><br><table border=1 style=\"background-color:#e0e0e0\">", title);
DoGrandHTMLTotals();
fprintf(mFD, "</center></table>\n");
fprintf(mFD, "</body></html>\n");
fclose(mFD);
mFD = nsnull;
}
#endif // not XP!
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg)
{
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->ClearTotals();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearTotals()
{
PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this);
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
gTots->SetTotalsCache();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg)
{
PRBool cycledOnce = (arg != 0);
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
if (cycledOnce) {
counter->CalcDiffInTotals();
counter->DisplayDiffTotals(str);
}
counter->SetTotalsCache();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr)
{
if (mCycledOnce) {
printf("Differences\n");
for (PRInt32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
ClearGrandTotals();
}
PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce);
mCycledOnce = PR_TRUE;
}
#endif // MOZ_REFLOW_PERF
// make a color string like #RRGGBB
void ColorToString(nscolor aColor, nsAutoString &aString)
{
nsAutoString tmp;
aString.SetLength(0);
// #
aString.Append(NS_LITERAL_STRING("#"));
// RR
tmp.AppendInt((PRInt32)NS_GET_R(aColor), 16);
if (tmp.Length() < 2) tmp.AppendInt(0,16);
aString.Append(tmp);
tmp.SetLength(0);
// GG
tmp.AppendInt((PRInt32)NS_GET_G(aColor), 16);
if (tmp.Length() < 2) tmp.AppendInt(0,16);
aString.Append(tmp);
tmp.SetLength(0);
// BB
tmp.AppendInt((PRInt32)NS_GET_B(aColor), 16);
if (tmp.Length() < 2) tmp.AppendInt(0,16);
aString.Append(tmp);
}
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