зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
4.0 KiB
C++
137 строки
4.0 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 "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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#include "nsLayoutAtoms.h"
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nsresult
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NS_NewPlaceholderFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsPlaceholderFrame* it = new (aPresShell) 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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*aNewFrame = 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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DO_GLOBAL_REFLOW_COUNT("nsPlaceholderFrame", aReflowState.reason);
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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::GetFrameType(nsIAtom** aType) const
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{
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NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
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*aType = nsLayoutAtoms::placeholderFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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#ifdef DEBUG
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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::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Placeholder", aResult);
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
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{
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IndentBy(out, aIndent);
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ListTag(out);
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#ifdef DEBUG_waterson
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fprintf(out, " [parent=%p]", mParent);
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#endif
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nsIView* view;
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GetView(aPresContext, &view);
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if (nsnull != view) {
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fprintf(out, " [view=%p]", view);
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}
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fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
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if (0 != mState) {
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fprintf(out, " [state=%08x]", mState);
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}
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if (mOutOfFlowFrame) {
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fprintf(out, " outOfFlowFrame=");
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nsFrame::ListTag(out, mOutOfFlowFrame);
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}
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fputs("\n", out);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::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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