gecko-dev/layout/generic/nsHTMLReflowCommand.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
* 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/
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*
* 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.
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
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#include "nsHTMLReflowCommand.h"
#include "nsHTMLParts.h"
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#include "nsIFrame.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIContent.h"
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#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
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#include "nsFrame.h"
#include "nsContainerFrame.h"
#include "nsLayoutAtoms.h"
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nsresult
NS_NewHTMLReflowCommand(nsHTMLReflowCommand** aInstancePtrResult,
nsIFrame* aTargetFrame,
nsReflowType aReflowType,
nsIFrame* aChildFrame,
nsIAtom* aAttribute)
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{
NS_ASSERTION(aInstancePtrResult,
"null result passed to NS_NewHTMLReflowCommand");
*aInstancePtrResult = new nsHTMLReflowCommand(aTargetFrame, aReflowType,
aChildFrame, aAttribute);
if (!*aInstancePtrResult) {
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return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
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}
#ifdef DEBUG_jesup
PRInt32 gReflows;
PRInt32 gReflowsInUse;
PRInt32 gReflowsInUseMax;
PRInt32 gReflowsZero;
PRInt32 gReflowsAuto;
PRInt32 gReflowsLarger;
PRInt32 gReflowsMaxZero;
PRInt32 gReflowsMaxAuto;
PRInt32 gReflowsMaxLarger;
class mPathStats {
public:
mPathStats();
~mPathStats();
};
mPathStats::mPathStats()
{
}
mPathStats::~mPathStats()
{
printf("nsHTMLReflowCommand->mPath stats:\n");
printf("\tNumber created: %d\n",gReflows);
printf("\tNumber in-use: %d\n",gReflowsInUseMax);
printf("\tNumber size == 0: %d\n",gReflowsZero);
printf("\tNumber size <= 8: %d\n",gReflowsAuto);
printf("\tNumber size > 8: %d\n",gReflowsLarger);
printf("\tNum max size == 0: %d\n",gReflowsMaxZero);
printf("\tNum max size <= 8: %d\n",gReflowsMaxAuto);
printf("\tNum max size > 8: %d\n",gReflowsMaxLarger);
}
// Just so constructor/destructor's get called
mPathStats gmPathStats;
#endif
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// Construct a reflow command given a target frame, reflow command type,
// and optional child frame
nsHTMLReflowCommand::nsHTMLReflowCommand(nsIFrame* aTargetFrame,
nsReflowType aReflowType,
nsIFrame* aChildFrame,
nsIAtom* aAttribute)
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: mType(aReflowType), mTargetFrame(aTargetFrame), mChildFrame(aChildFrame),
mAttribute(aAttribute),
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mListName(nsnull),
mFlags(0)
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{
MOZ_COUNT_CTOR(nsHTMLReflowCommand);
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NS_PRECONDITION(mTargetFrame != nsnull, "null target frame");
if (nsnull!=mAttribute)
NS_ADDREF(mAttribute);
#ifdef DEBUG_jesup
gReflows++;
gReflowsInUse++;
if (gReflowsInUse > gReflowsInUseMax)
gReflowsInUseMax = gReflowsInUse;
#endif
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}
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nsHTMLReflowCommand::~nsHTMLReflowCommand()
{
MOZ_COUNT_DTOR(nsHTMLReflowCommand);
#ifdef DEBUG_jesup
if (mPath.GetArraySize() == 0)
gReflowsMaxZero++;
else if (mPath.GetArraySize() <= 8)
gReflowsMaxAuto++;
else
gReflowsMaxLarger++;
gReflowsInUse--;
#endif
NS_IF_RELEASE(mAttribute);
NS_IF_RELEASE(mListName);
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}
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nsresult
nsHTMLReflowCommand::GetTarget(nsIFrame*& aTargetFrame) const
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{
aTargetFrame = mTargetFrame;
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::SetTarget(nsIFrame* aTargetFrame)
{
mTargetFrame = aTargetFrame;
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::GetType(nsReflowType& aReflowType) const
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{
aReflowType = mType;
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::GetAttribute(nsIAtom *& aAttribute) const
{
aAttribute = mAttribute;
if (nsnull!=aAttribute)
NS_ADDREF(aAttribute);
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::GetChildFrame(nsIFrame*& aChildFrame) const
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{
aChildFrame = mChildFrame;
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::GetChildListName(nsIAtom*& aListName) const
{
aListName = mListName;
NS_IF_ADDREF(aListName);
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::SetChildListName(nsIAtom* aListName)
{
mListName = aListName;
NS_IF_ADDREF(mListName);
return NS_OK;
}
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nsresult
nsHTMLReflowCommand::List(FILE* out) const
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{
#ifdef DEBUG
static const char* kReflowCommandType[] = {
"ContentChanged",
"StyleChanged",
"ReflowDirty",
"UserDefined",
};
fprintf(out, "ReflowCommand@%p[%s]:",
this, kReflowCommandType[mType]);
if (mTargetFrame) {
fprintf(out, " target=");
nsFrame::ListTag(out, mTargetFrame);
}
if (mChildFrame) {
fprintf(out, " child=");
nsFrame::ListTag(out, mChildFrame);
}
if (mAttribute) {
fprintf(out, " attr=");
nsAutoString attr;
mAttribute->ToString(attr);
fputs(NS_LossyConvertUCS2toASCII(attr).get(), out);
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}
if (mListName) {
fprintf(out, " list=");
nsAutoString attr;
mListName->ToString(attr);
fputs(NS_LossyConvertUCS2toASCII(attr).get(), out);
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}
fprintf(out, "\n");
// Show the path, but without using mPath which is in an undefined
// state at this point.
if (mTargetFrame) {
PRBool didOne = PR_FALSE;
for (nsIFrame* f = mTargetFrame; nsnull != f; f->GetParent(&f)) {
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if (f != mTargetFrame) {
fprintf(out, " ");
nsFrame::ListTag(out, f);
didOne = PR_TRUE;
}
}
if (didOne) {
fprintf(out, "\n");
}
}
#endif
return NS_OK;
}
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nsresult
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nsHTMLReflowCommand::GetFlags(PRInt32* aFlags)
{
*aFlags = mFlags;
return NS_OK;
}
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nsresult
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nsHTMLReflowCommand::SetFlags(PRInt32 aFlags)
{
mFlags = aFlags;
return NS_OK;
}