mirror of
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187 lines
4.7 KiB
C++
187 lines
4.7 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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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::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv;
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rv = nsFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
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if (aPrevInFlow) {
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// Hook the frame into the flow
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mPrevInFlow = aPrevInFlow;
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aPrevInFlow->SetNextInFlow(this);
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// Make sure the general flags bits are the same
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nsFrameState state;
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aPrevInFlow->GetFrameState(&state);
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if ((state & NS_FRAME_SYNC_FRAME_AND_VIEW) == 0) {
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mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
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}
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if (state & NS_FRAME_REPLACED_ELEMENT) {
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mState |= NS_FRAME_REPLACED_ELEMENT;
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}
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if (state & NS_FRAME_SELECTED_CONTENT) {
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mState |= NS_FRAME_SELECTED_CONTENT;
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}
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}
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return rv;
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}
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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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// Remove this frame from the flow. Connects prev in flow and next in flow
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void
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nsSplittableFrame::RemoveFromFlow(nsIFrame* aFrame)
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{
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nsIFrame* prevInFlow;
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nsIFrame* nextInFlow;
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aFrame->GetPrevInFlow(&prevInFlow);
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aFrame->GetNextInFlow(&nextInFlow);
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if (prevInFlow) {
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prevInFlow->SetNextInFlow(nextInFlow);
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}
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if (nextInFlow) {
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nextInFlow->SetPrevInFlow(prevInFlow);
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}
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aFrame->SetPrevInFlow(nsnull);
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aFrame->SetNextInFlow(nsnull);
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}
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// Detach from previous frame in flow
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void
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nsSplittableFrame::BreakFromPrevFlow(nsIFrame* aFrame)
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{
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nsIFrame* prevInFlow;
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aFrame->GetPrevInFlow(&prevInFlow);
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if (prevInFlow) {
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prevInFlow->SetNextInFlow(nsnull);
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aFrame->SetPrevInFlow(nsnull);
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}
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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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#ifdef DEBUG
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void
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nsSplittableFrame::DumpBaseRegressionData(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent)
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{
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nsFrame::DumpBaseRegressionData(aPresContext, 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=\"%ld\"/>\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=\"%ld\"/>\n", PRUptrdiff(mPrevInFlow));
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}
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}
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NS_IMETHODIMP
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nsSplittableFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
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{
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if (!aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = sizeof(*this);
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return NS_OK;
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}
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#endif
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