зеркало из https://github.com/mozilla/pjs.git
121 строка
3.8 KiB
C++
121 строка
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
#include "nsPlaceholderFrame.h"
|
|
#include "nsLineLayout.h"
|
|
#include "nsHTMLIIDs.h"
|
|
|
|
#include "nsIContent.h"
|
|
#include "nsIPresContext.h"
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsIStyleContext.h"
|
|
|
|
nsresult
|
|
NS_NewPlaceholderFrame(nsIFrame** aInstancePtrResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
|
|
if (nsnull == aInstancePtrResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsIFrame* it = new nsPlaceholderFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aInstancePtrResult = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlaceholderFrame::Reflow(nsIPresContext& aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
if (nsnull != aReflowState.lineLayout) {
|
|
if (eReflowReason_Initial == aReflowState.reason) {
|
|
aReflowState.lineLayout->InitFloater(this);
|
|
}
|
|
else {
|
|
aReflowState.lineLayout->AddFloater(this);
|
|
}
|
|
}
|
|
|
|
aDesiredSize.width = 0;
|
|
aDesiredSize.height = 0;
|
|
aDesiredSize.ascent = 0;
|
|
aDesiredSize.descent = 0;
|
|
if (nsnull != aDesiredSize.maxElementSize) {
|
|
aDesiredSize.maxElementSize->width = 0;
|
|
aDesiredSize.maxElementSize->height = 0;
|
|
}
|
|
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlaceholderFrame::Paint(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
if (nsIFrame::GetShowFrameBorders()) {
|
|
float p2t = aPresContext.GetPixelsToTwips();
|
|
aRenderingContext.SetColor(NS_RGB(0, 255, 255));
|
|
nscoord x = NSIntPixelsToTwips(-5, p2t);
|
|
aRenderingContext.FillRect(x, 0, NSIntPixelsToTwips(13, p2t),
|
|
NSIntPixelsToTwips(3, p2t));
|
|
nscoord y = NSIntPixelsToTwips(-10, p2t);
|
|
aRenderingContext.FillRect(0, y, NSIntPixelsToTwips(3, p2t),
|
|
NSIntPixelsToTwips(10, p2t));
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlaceholderFrame::ContentChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
nsISupports* aSubContent)
|
|
{
|
|
NS_ASSERTION(mContent == aChild, "bad content-changed target");
|
|
|
|
// Forward the notification to the floater
|
|
if (nsnull != mAnchoredItem) {
|
|
return mAnchoredItem->ContentChanged(aPresContext, aChild, aSubContent);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlaceholderFrame::AttributeChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aHint)
|
|
{
|
|
// Forward the notification to the floater
|
|
if (nsnull != mAnchoredItem) {
|
|
return mAnchoredItem->AttributeChanged(aPresContext, aChild,
|
|
aAttribute, aHint);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlaceholderFrame::GetFrameName(nsString& aResult) const
|
|
{
|
|
return MakeFrameName("Placeholder", aResult);
|
|
}
|