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103 lines
3.6 KiB
C++
103 lines
3.6 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 "nsPlaceholderFrame.h"
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#include "nsIContent.h"
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#include "nsIContentDelegate.h"
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#include "nsIFloaterContainer.h"
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static NS_DEFINE_IID(kIFloaterContainerIID, NS_IFLOATERCONTAINER_IID);
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nsresult
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PlaceholderFrame::NewFrame(nsIFrame** aInstancePtrResult,
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nsIContent* aContent,
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PRInt32 aIndexInParent,
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nsIFrame* aParent)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIFrame* it = new PlaceholderFrame(aContent, aIndexInParent, aParent);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aInstancePtrResult = it;
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return NS_OK;
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}
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PlaceholderFrame::PlaceholderFrame(nsIContent* aContent,
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PRInt32 aIndexInParent,
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nsIFrame* aParent)
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: nsFrame(aContent, aIndexInParent, aParent)
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{
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mAnchoredItem = nsnull;
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}
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PlaceholderFrame::~PlaceholderFrame()
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{
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}
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NS_METHOD PlaceholderFrame::ResizeReflow(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsSize& aMaxSize,
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nsSize* aMaxElementSize,
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ReflowStatus& aStatus)
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{
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// Get the floater container in which we're inserted
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nsIFloaterContainer* container = nsnull;
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for (nsIFrame* parent = mGeometricParent; parent; parent->GetGeometricParent(parent)) {
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if (NS_OK == parent->QueryInterface(kIFloaterContainerIID, (void**)&container)) {
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break;
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}
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}
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NS_ASSERTION(nsnull != container, "no floater container");
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// Have we created the anchored item yet?
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if (nsnull == mAnchoredItem) {
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// Create the anchored item
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nsIContentDelegate* delegate = mContent->GetDelegate(aPresContext);
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mAnchoredItem = delegate->CreateFrame(aPresContext, mContent, mIndexInParent,
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mGeometricParent);
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NS_RELEASE(delegate);
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// Set the style context for the frame
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mAnchoredItem->SetStyleContext(mStyleContext);
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// Resize reflow the anchored item into the available space
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// XXX Check for complete?
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mAnchoredItem->ResizeReflow(aPresContext, aDesiredSize, aMaxSize, nsnull, aStatus);
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mAnchoredItem->SizeTo(aDesiredSize.width, aDesiredSize.height);
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// Now notify our containing block that there's a new floater
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container->AddFloater(aPresContext, mAnchoredItem, this);
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} else {
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container->PlaceFloater(aPresContext, mAnchoredItem, this);
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}
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return nsFrame::ResizeReflow(aPresContext, aDesiredSize, aMaxSize, aMaxElementSize, aStatus);
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}
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NS_METHOD PlaceholderFrame::ListTag(FILE* out) const
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{
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fputs("*placeholder", out);
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fprintf(out, "(%d)@%p", mIndexInParent, this);
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return NS_OK;
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}
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