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168 lines
5.5 KiB
C++
168 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsPlaceholderFrame.h"
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#include "nsLineLayout.h"
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#include "nsIContent.h"
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#include "nsPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsLayoutAtoms.h"
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#include "nsFrameManager.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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// These are useful for debugging
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nsPlaceholderFrame::nsPlaceholderFrame()
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{
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}
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nsPlaceholderFrame::~nsPlaceholderFrame()
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{
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::Reflow(nsPresContext* 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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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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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 (aDesiredSize.mComputeMEW) {
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aDesiredSize.mMaxElementWidth = 0;
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}
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::Destroy(nsPresContext* aPresContext)
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{
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nsIPresShell* shell = aPresContext->GetPresShell();
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if (shell && mOutOfFlowFrame) {
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NS_ASSERTION(!shell->FrameManager()->GetPlaceholderFrameFor(mOutOfFlowFrame),
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"Placeholder relationship should have been torn down");
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}
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return nsSplittableFrame::Destroy(aPresContext);
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}
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nsIAtom*
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nsPlaceholderFrame::GetType() const
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{
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return nsLayoutAtoms::placeholderFrame;
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}
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#ifdef DEBUG
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NS_IMETHODIMP
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nsPlaceholderFrame::Paint(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags)
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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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p2t = aPresContext->PixelsToTwips();
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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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DO_GLOBAL_REFLOW_COUNT_DSP("nsPlaceholderFrame", &aRenderingContext);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Placeholder"), aResult);
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}
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NS_IMETHODIMP
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nsPlaceholderFrame::List(nsPresContext* 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]", NS_STATIC_CAST(void*, mParent));
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#endif
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if (HasView()) {
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fprintf(out, " [view=%p]", (void*)GetView());
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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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nsIFrame* prevInFlow = GetPrevInFlow();
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nsIFrame* nextInFlow = GetNextInFlow();
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if (nsnull != prevInFlow) {
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fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, prevInFlow));
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}
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if (nsnull != nextInFlow) {
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fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, nextInFlow));
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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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#endif
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