зеркало из https://github.com/mozilla/pjs.git
165 строки
4.2 KiB
C++
165 строки
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsSplittableFrame.h"
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#include "nsIContent.h"
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#include "nsIPresContext.h"
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#include "nsIStyleContext.h"
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#include "nsISizeOfHandler.h"
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NS_IMETHODIMP
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nsSplittableFrame::IsSplittable(nsSplittableType& aIsSplittable) const
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{
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aIsSplittable = NS_FRAME_SPLITTABLE;
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return NS_OK;
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}
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NS_METHOD nsSplittableFrame::GetPrevInFlow(nsIFrame*& aPrevInFlow) const
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{
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aPrevInFlow = mPrevInFlow;
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return NS_OK;
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}
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NS_METHOD nsSplittableFrame::SetPrevInFlow(nsIFrame* aFrame)
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{
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mPrevInFlow = aFrame;
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return NS_OK;
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}
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NS_METHOD nsSplittableFrame::GetNextInFlow(nsIFrame*& aNextInFlow) const
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{
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aNextInFlow = mNextInFlow;
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return NS_OK;
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}
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NS_METHOD nsSplittableFrame::SetNextInFlow(nsIFrame* aFrame)
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{
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mNextInFlow = aFrame;
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return NS_OK;
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}
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nsIFrame* nsSplittableFrame::GetFirstInFlow() const
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{
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nsSplittableFrame* firstInFlow;
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nsSplittableFrame* prevInFlow = (nsSplittableFrame*)this;
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while (nsnull!=prevInFlow) {
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firstInFlow = prevInFlow;
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prevInFlow = (nsSplittableFrame*)firstInFlow->mPrevInFlow;
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}
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NS_POSTCONDITION(nsnull!=firstInFlow, "illegal state in flow chain.");
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return firstInFlow;
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}
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nsIFrame* nsSplittableFrame::GetLastInFlow() const
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{
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nsSplittableFrame* lastInFlow;
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nsSplittableFrame* nextInFlow = (nsSplittableFrame*)this;
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while (nsnull!=nextInFlow) {
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lastInFlow = nextInFlow;
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nextInFlow = (nsSplittableFrame*)lastInFlow->mNextInFlow;
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}
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NS_POSTCONDITION(nsnull!=lastInFlow, "illegal state in flow chain.");
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return lastInFlow;
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}
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// Append this frame to flow after aAfterFrame
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NS_METHOD nsSplittableFrame::AppendToFlow(nsIFrame* aAfterFrame)
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{
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NS_PRECONDITION(aAfterFrame != nsnull, "null pointer");
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mPrevInFlow = aAfterFrame;
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aAfterFrame->GetNextInFlow(mNextInFlow);
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mPrevInFlow->SetNextInFlow(this);
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if (mNextInFlow) {
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mNextInFlow->SetPrevInFlow(this);
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}
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return NS_OK;
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}
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// Prepend this frame to flow before aBeforeFrame
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NS_METHOD nsSplittableFrame::PrependToFlow(nsIFrame* aBeforeFrame)
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{
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NS_PRECONDITION(aBeforeFrame != nsnull, "null pointer");
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aBeforeFrame->GetPrevInFlow(mPrevInFlow);
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mNextInFlow = aBeforeFrame;
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mNextInFlow->SetPrevInFlow(this);
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if (mPrevInFlow) {
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mPrevInFlow->SetNextInFlow(this);
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}
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return NS_OK;
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}
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// Remove this frame from the flow. Connects prev in flow and next in flow
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NS_METHOD nsSplittableFrame::RemoveFromFlow()
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{
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if (mPrevInFlow) {
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mPrevInFlow->SetNextInFlow(mNextInFlow);
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}
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if (mNextInFlow) {
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mNextInFlow->SetPrevInFlow(mPrevInFlow);
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}
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mPrevInFlow = mNextInFlow = nsnull;
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return NS_OK;
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}
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// Detach from previous frame in flow
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NS_METHOD nsSplittableFrame::BreakFromPrevFlow()
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{
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if (mPrevInFlow) {
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mPrevInFlow->SetNextInFlow(nsnull);
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mPrevInFlow = nsnull;
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}
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return NS_OK;
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}
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// Detach from next frame in flow
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NS_METHOD nsSplittableFrame::BreakFromNextFlow()
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{
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if (mNextInFlow) {
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mNextInFlow->SetPrevInFlow(nsnull);
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mNextInFlow = nsnull;
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}
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return NS_OK;
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}
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nsIFrame * nsSplittableFrame::GetPrevInFlow()
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{
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return mPrevInFlow;
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}
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nsIFrame * nsSplittableFrame::GetNextInFlow()
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{
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return mNextInFlow;
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}
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void
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nsSplittableFrame::DumpBaseRegressionData(FILE* out, PRInt32 aIndent)
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{
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nsFrame::DumpBaseRegressionData(out, aIndent);
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if (nsnull != mNextInFlow) {
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IndentBy(out, aIndent);
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fprintf(out, "<next-in-flow va=\"%d\"/>\n", PRUptrdiff(mNextInFlow));
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}
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if (nsnull != mPrevInFlow) {
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IndentBy(out, aIndent);
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fprintf(out, "<prev-in-flow va=\"%d\"/>\n", PRUptrdiff(mPrevInFlow));
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}
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}
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