зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.9 KiB
C++
123 строки
3.9 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 "nsLineLayout.h"
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#include "nsHTMLIIDs.h"
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#include "nsIContent.h"
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#include "nsIPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsIStyleContext.h"
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nsresult
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NS_NewPlaceholderFrame(nsIFrame** aInstancePtrResult)
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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 nsPlaceholderFrame;
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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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NS_IMETHODIMP
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nsPlaceholderFrame::Reflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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if (nsnull != aReflowState.lineLayout) {
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if (eReflowReason_Initial == aReflowState.reason) {
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aReflowState.lineLayout->InitFloater(this);
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}
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else {
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aReflowState.lineLayout->AddFloater(this);
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}
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}
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aDesiredSize.width = 0;
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aDesiredSize.height = 0;
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aDesiredSize.ascent = 0;
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aDesiredSize.descent = 0;
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if (nsnull != aDesiredSize.maxElementSize) {
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aDesiredSize.maxElementSize->width = 0;
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aDesiredSize.maxElementSize->height = 0;
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}
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aStatus = NS_FRAME_COMPLETE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
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float p2t;
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aPresContext.GetPixelsToTwips(&p2t);
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aRenderingContext.SetColor(NS_RGB(0, 255, 255));
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nscoord x = NSIntPixelsToTwips(-5, p2t);
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aRenderingContext.FillRect(x, 0, NSIntPixelsToTwips(13, p2t),
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NSIntPixelsToTwips(3, p2t));
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nscoord y = NSIntPixelsToTwips(-10, p2t);
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aRenderingContext.FillRect(0, y, NSIntPixelsToTwips(3, p2t),
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NSIntPixelsToTwips(10, p2t));
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::ContentChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsISupports* aSubContent)
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{
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NS_ASSERTION(mContent == aChild, "bad content-changed target");
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// Forward the notification to the floater
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if (nsnull != mAnchoredItem) {
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return mAnchoredItem->ContentChanged(aPresContext, aChild, aSubContent);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsIAtom* aAttribute,
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PRInt32 aHint)
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{
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// Forward the notification to the floater
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if (nsnull != mAnchoredItem) {
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return mAnchoredItem->AttributeChanged(aPresContext, aChild,
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aAttribute, aHint);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Placeholder", aResult);
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}
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