2001-09-29 00:14:13 +04:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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2004-04-18 18:30:37 +04:00
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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1999-04-28 02:05:02 +04:00
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*
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2004-04-18 18:30:37 +04:00
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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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1999-04-28 02:05:02 +04:00
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*
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2001-09-29 00:14:13 +04:00
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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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1999-04-28 02:05:02 +04:00
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*
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* The Original Code is Mozilla Communicator client code.
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*
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2004-04-18 18:30:37 +04:00
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* The Initial Developer of the Original Code is
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2001-09-29 00:14:13 +04:00
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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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1999-11-06 06:40:37 +03:00
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*
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2001-09-29 00:14:13 +04:00
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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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2004-04-18 18:30:37 +04:00
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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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2001-09-29 00:14:13 +04:00
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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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2004-04-18 18:30:37 +04:00
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* use your version of this file under the terms of the MPL, indicate your
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2001-09-29 00:14:13 +04:00
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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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2004-04-18 18:30:37 +04:00
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* the terms of any one of the MPL, the GPL or the LGPL.
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2001-09-29 00:14:13 +04:00
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*
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* ***** END LICENSE BLOCK ***** */
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2006-03-29 22:29:03 +04:00
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/* rendering object for CSS :first-letter pseudo-element */
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1999-10-29 18:34:01 +04:00
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#include "nsCOMPtr.h"
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1999-04-28 02:05:02 +04:00
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#include "nsHTMLContainerFrame.h"
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2004-08-01 03:15:21 +04:00
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#include "nsPresContext.h"
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2003-02-22 03:32:13 +03:00
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#include "nsStyleContext.h"
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1999-10-29 18:34:01 +04:00
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#include "nsIContent.h"
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1999-04-28 02:05:02 +04:00
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#include "nsLineLayout.h"
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#include "nsHTMLAtoms.h"
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#include "nsLayoutAtoms.h"
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2003-02-22 03:32:13 +03:00
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#include "nsAutoPtr.h"
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2004-01-28 03:18:22 +03:00
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#include "nsStyleSet.h"
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2004-02-24 00:29:06 +03:00
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#include "nsFrameManager.h"
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1999-04-28 02:05:02 +04:00
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#define nsFirstLetterFrameSuper nsHTMLContainerFrame
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class nsFirstLetterFrame : public nsFirstLetterFrameSuper {
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public:
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2006-03-27 01:30:36 +04:00
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nsFirstLetterFrame(nsStyleContext* aContext) : nsHTMLContainerFrame(aContext) {}
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1999-04-28 02:05:02 +04:00
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2006-03-09 21:55:21 +03:00
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NS_IMETHOD Init(nsIContent* aContent,
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1999-04-28 02:05:02 +04:00
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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2006-04-10 04:16:29 +04:00
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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1999-04-28 02:05:02 +04:00
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nsIFrame* aChildList);
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1999-11-02 01:12:45 +03:00
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#ifdef NS_DEBUG
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2001-11-14 04:33:42 +03:00
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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1999-11-02 01:12:45 +03:00
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#endif
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2003-10-31 23:19:18 +03:00
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virtual nsIAtom* GetType() const;
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2004-08-01 03:15:21 +04:00
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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1999-04-28 02:05:02 +04:00
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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1999-11-06 01:09:16 +03:00
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2000-07-29 02:29:28 +04:00
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NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
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2004-08-01 03:15:21 +04:00
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NS_IMETHOD SetSelected(nsPresContext* aPresContext, nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread);
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1999-11-06 01:09:16 +03:00
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2000-01-08 03:31:32 +03:00
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//override of nsFrame method
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2000-06-27 18:47:21 +04:00
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NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
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2000-01-22 04:16:50 +03:00
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PRBool inHint,
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PRInt32* outFrameContentOffset,
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nsIFrame **outChildFrame);
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2000-06-27 18:47:21 +04:00
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1999-04-28 02:05:02 +04:00
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protected:
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virtual PRIntn GetSkipSides() const;
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2004-08-01 03:15:21 +04:00
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void DrainOverflowFrames(nsPresContext* aPresContext);
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1999-04-28 02:05:02 +04:00
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};
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2005-11-04 05:38:33 +03:00
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nsIFrame*
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2006-03-27 01:30:36 +04:00
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NS_NewFirstLetterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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1999-04-28 02:05:02 +04:00
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{
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2006-03-27 01:30:36 +04:00
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return new (aPresShell) nsFirstLetterFrame(aContext);
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1999-04-28 02:05:02 +04:00
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}
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1999-11-02 01:12:45 +03:00
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#ifdef NS_DEBUG
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1999-04-28 02:05:02 +04:00
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NS_IMETHODIMP
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2001-11-14 04:33:42 +03:00
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nsFirstLetterFrame::GetFrameName(nsAString& aResult) const
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1999-04-28 02:05:02 +04:00
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{
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2001-11-14 04:33:42 +03:00
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return MakeFrameName(NS_LITERAL_STRING("Letter"), aResult);
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1999-04-28 02:05:02 +04:00
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}
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1999-11-02 01:12:45 +03:00
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#endif
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1999-04-28 02:05:02 +04:00
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2003-10-31 23:19:18 +03:00
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nsIAtom*
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nsFirstLetterFrame::GetType() const
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1999-04-28 02:05:02 +04:00
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{
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2003-10-31 23:19:18 +03:00
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return nsLayoutAtoms::letterFrame;
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1999-04-28 02:05:02 +04:00
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}
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PRIntn
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nsFirstLetterFrame::GetSkipSides() const
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{
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return 0;
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}
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NS_IMETHODIMP
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2006-03-09 21:55:21 +03:00
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nsFirstLetterFrame::Init(nsIContent* aContent,
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1999-04-28 02:05:02 +04:00
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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2003-02-22 03:32:13 +03:00
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nsRefPtr<nsStyleContext> newSC;
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1999-04-28 02:05:02 +04:00
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if (aPrevInFlow) {
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2001-10-31 05:53:47 +03:00
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// Get proper style context for ourselves. We're creating the frame
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// that represents everything *except* the first letter, so just create
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// a style context like we would for a text node.
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2006-03-27 01:30:36 +04:00
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nsStyleContext* parentStyleContext = mStyleContext->GetParent();
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1999-04-28 02:05:02 +04:00
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if (parentStyleContext) {
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2006-03-27 01:30:36 +04:00
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newSC = mStyleContext->GetRuleNode()->GetPresContext()->StyleSet()->
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2004-01-28 03:18:22 +03:00
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ResolveStyleForNonElement(parentStyleContext);
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2001-10-31 05:53:47 +03:00
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if (newSC)
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2006-03-27 01:30:36 +04:00
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SetStyleContextWithoutNotification(newSC);
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1999-04-28 02:05:02 +04:00
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}
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}
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2006-03-09 21:55:21 +03:00
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2006-03-27 01:30:36 +04:00
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return nsFirstLetterFrameSuper::Init(aContent, aParent, aPrevInFlow);
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1999-04-28 02:05:02 +04:00
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}
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NS_IMETHODIMP
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2006-04-10 04:16:29 +04:00
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nsFirstLetterFrame::SetInitialChildList(nsIAtom* aListName,
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nsIFrame* aChildList)
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1999-04-28 02:05:02 +04:00
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{
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mFrames.SetFrames(aChildList);
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2006-04-10 04:16:29 +04:00
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nsFrameManager *frameManager = GetPresContext()->FrameManager();
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2004-02-01 01:41:40 +03:00
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2003-11-13 07:31:04 +03:00
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for (nsIFrame* frame = aChildList; frame; frame = frame->GetNextSibling()) {
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2006-03-16 04:30:38 +03:00
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NS_ASSERTION(frame->GetParent() == this, "Unexpected parent");
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frameManager->ReParentStyleContext(frame);
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1999-10-29 18:34:01 +04:00
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}
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1999-04-28 02:05:02 +04:00
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return NS_OK;
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}
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1999-11-06 01:09:16 +03:00
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NS_IMETHODIMP
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2004-08-01 03:15:21 +04:00
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nsFirstLetterFrame::SetSelected(nsPresContext* aPresContext, nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread)
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1999-11-06 01:09:16 +03:00
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{
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if (aSelected && ParentDisablesSelection())
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return NS_OK;
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2004-01-09 17:20:53 +03:00
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nsIFrame *child = GetFirstChild(nsnull);
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2003-06-27 22:13:48 +04:00
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while (child)
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1999-11-06 01:09:16 +03:00
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{
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2003-06-27 22:13:48 +04:00
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child->SetSelected(aPresContext, aRange, aSelected, aSpread);
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// don't worry about result. there are more frames to come
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child = child->GetNextSibling();
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1999-11-06 01:09:16 +03:00
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}
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return NS_OK;
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}
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2000-01-08 03:31:32 +03:00
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NS_IMETHODIMP
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2000-06-27 18:47:21 +04:00
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nsFirstLetterFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
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2000-01-22 04:16:50 +03:00
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PRBool inHint,
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PRInt32* outFrameContentOffset,
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nsIFrame **outChildFrame)
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2000-01-08 03:31:32 +03:00
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{
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2000-06-27 18:47:21 +04:00
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nsIFrame *kid = mFrames.FirstChild();
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if (kid)
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2000-01-08 03:31:32 +03:00
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{
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return kid->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
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}
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else
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return nsFrame::GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
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}
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1999-04-28 02:05:02 +04:00
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NS_IMETHODIMP
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2004-08-01 03:15:21 +04:00
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nsFirstLetterFrame::Reflow(nsPresContext* aPresContext,
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1999-04-28 02:05:02 +04:00
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aReflowStatus)
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{
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2000-04-21 18:59:47 +04:00
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DO_GLOBAL_REFLOW_COUNT("nsFirstLetterFrame", aReflowState.reason);
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2001-11-14 16:40:03 +03:00
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aReflowStatus);
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1999-10-29 18:34:01 +04:00
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nsresult rv = NS_OK;
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1999-04-28 02:05:02 +04:00
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// Grab overflow list
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1999-11-24 09:03:41 +03:00
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DrainOverflowFrames(aPresContext);
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1999-04-28 02:05:02 +04:00
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nsIFrame* kid = mFrames.FirstChild();
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// Setup reflow state for our child
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nsSize availSize(aReflowState.availableWidth, aReflowState.availableHeight);
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const nsMargin& bp = aReflowState.mComputedBorderPadding;
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nscoord lr = bp.left + bp.right;
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nscoord tb = bp.top + bp.bottom;
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if (NS_UNCONSTRAINEDSIZE != availSize.width) {
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availSize.width -= lr;
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}
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if (NS_UNCONSTRAINEDSIZE != availSize.height) {
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1999-10-29 18:34:01 +04:00
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availSize.height -= tb;
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1999-04-28 02:05:02 +04:00
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}
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// Reflow the child
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1999-10-29 18:34:01 +04:00
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if (!aReflowState.mLineLayout) {
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1999-04-28 02:05:02 +04:00
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// When there is no lineLayout provided, we provide our own. The
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// only time that the first-letter-frame is not reflowing in a
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// line context is when its floating.
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1999-10-29 18:34:01 +04:00
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nsHTMLReflowState rs(aPresContext, aReflowState, kid, availSize);
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1999-04-28 02:05:02 +04:00
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nsLineLayout ll(aPresContext, nsnull, &aReflowState,
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2003-01-09 17:26:32 +03:00
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aMetrics.mComputeMEW);
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1999-04-28 02:05:02 +04:00
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ll.BeginLineReflow(0, 0, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE,
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PR_FALSE, PR_TRUE);
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1999-07-20 07:51:46 +04:00
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rs.mLineLayout = ≪
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1999-04-28 02:05:02 +04:00
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ll.SetFirstLetterStyleOK(PR_TRUE);
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1999-10-29 18:34:01 +04:00
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1999-10-30 06:52:11 +04:00
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kid->WillReflow(aPresContext);
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kid->Reflow(aPresContext, aMetrics, rs, aReflowStatus);
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1999-10-29 18:34:01 +04:00
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1999-04-28 02:05:02 +04:00
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ll.EndLineReflow();
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}
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else {
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1999-10-29 18:34:01 +04:00
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// Pretend we are a span and reflow the child frame
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nsLineLayout* ll = aReflowState.mLineLayout;
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2000-01-03 07:32:13 +03:00
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PRBool pushedFrame;
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1999-10-29 18:34:01 +04:00
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ll->BeginSpan(this, &aReflowState, bp.left, availSize.width);
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2002-05-10 22:22:41 +04:00
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ll->ReflowFrame(kid, aReflowStatus, &aMetrics, pushedFrame);
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1999-10-29 18:34:01 +04:00
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nsSize size;
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2003-01-09 17:26:32 +03:00
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ll->EndSpan(this, size,
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aMetrics.mComputeMEW ? &aMetrics.mMaxElementWidth : nsnull);
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1999-04-28 02:05:02 +04:00
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}
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// Place and size the child and update the output metrics
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2003-06-27 22:13:48 +04:00
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kid->SetRect(nsRect(bp.left, bp.top, aMetrics.width, aMetrics.height));
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2001-12-07 17:51:12 +03:00
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kid->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
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1999-04-28 02:05:02 +04:00
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aMetrics.width += lr;
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aMetrics.height += tb;
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1999-10-29 18:34:01 +04:00
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aMetrics.ascent += bp.top;
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aMetrics.descent += bp.bottom;
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2003-01-09 17:26:32 +03:00
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if (aMetrics.mComputeMEW) {
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aMetrics.mMaxElementWidth += lr;
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1999-04-28 02:05:02 +04:00
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}
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// Create a continuation or remove existing continuations based on
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// the reflow completion status.
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if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
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2004-09-14 06:28:03 +04:00
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nsIFrame* kidNextInFlow = kid->GetNextInFlow();
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2003-06-27 22:13:48 +04:00
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if (kidNextInFlow) {
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1999-04-28 02:05:02 +04:00
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// Remove all of the childs next-in-flows
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2003-06-27 22:13:48 +04:00
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NS_STATIC_CAST(nsContainerFrame*, kidNextInFlow->GetParent())
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->DeleteNextInFlowChild(aPresContext, kidNextInFlow);
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1999-04-28 02:05:02 +04:00
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}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
// Create a continuation for the child frame if it doesn't already
|
|
|
|
// have one.
|
|
|
|
nsIFrame* nextInFlow;
|
|
|
|
rv = CreateNextInFlow(aPresContext, this, kid, nextInFlow);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
|
|
|
// And then push it to our overflow list
|
|
|
|
if (nextInFlow) {
|
|
|
|
kid->SetNextSibling(nsnull);
|
1999-11-24 09:03:41 +03:00
|
|
|
SetOverflowFrames(aPresContext, nextInFlow);
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|
1999-04-29 04:16:44 +04:00
|
|
|
else {
|
2003-06-27 22:13:48 +04:00
|
|
|
nsIFrame* nextSib = kid->GetNextSibling();
|
1999-04-29 04:16:44 +04:00
|
|
|
if (nextSib) {
|
|
|
|
kid->SetNextSibling(nsnull);
|
1999-11-24 09:03:41 +03:00
|
|
|
SetOverflowFrames(aPresContext, nextSib);
|
1999-04-29 04:16:44 +04:00
|
|
|
}
|
|
|
|
}
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|
|
|
|
|
2002-05-29 02:50:43 +04:00
|
|
|
NS_FRAME_SET_TRUNCATION(aReflowStatus, aReflowState, aMetrics);
|
1999-04-28 02:05:02 +04:00
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
2000-07-29 02:29:28 +04:00
|
|
|
NS_IMETHODIMP
|
|
|
|
nsFirstLetterFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
|
|
|
|
{
|
|
|
|
// We can continue a text run through a first-letter frame.
|
|
|
|
aContinueTextRun = PR_TRUE;
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
1999-04-28 02:05:02 +04:00
|
|
|
void
|
2004-08-01 03:15:21 +04:00
|
|
|
nsFirstLetterFrame::DrainOverflowFrames(nsPresContext* aPresContext)
|
1999-04-28 02:05:02 +04:00
|
|
|
{
|
1999-10-21 09:11:43 +04:00
|
|
|
nsIFrame* overflowFrames;
|
|
|
|
|
1999-04-28 02:05:02 +04:00
|
|
|
// Check for an overflow list with our prev-in-flow
|
2006-02-22 00:33:47 +03:00
|
|
|
nsFirstLetterFrame* prevInFlow = (nsFirstLetterFrame*)GetPrevInFlow();
|
1999-04-28 02:05:02 +04:00
|
|
|
if (nsnull != prevInFlow) {
|
1999-10-21 09:11:43 +04:00
|
|
|
overflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE);
|
|
|
|
if (overflowFrames) {
|
1999-04-28 02:05:02 +04:00
|
|
|
NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
|
|
|
|
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
|
|
// views need to be reparented.
|
1999-10-21 09:11:43 +04:00
|
|
|
nsIFrame* f = overflowFrames;
|
1999-04-28 02:05:02 +04:00
|
|
|
while (f) {
|
1999-10-26 08:44:41 +04:00
|
|
|
nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, prevInFlow, this);
|
2003-06-27 22:13:48 +04:00
|
|
|
f = f->GetNextSibling();
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|
1999-10-21 09:11:43 +04:00
|
|
|
mFrames.InsertFrames(this, nsnull, overflowFrames);
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// It's also possible that we have an overflow list for ourselves
|
1999-10-21 09:11:43 +04:00
|
|
|
overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE);
|
|
|
|
if (overflowFrames) {
|
1999-04-28 02:05:02 +04:00
|
|
|
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
|
1999-10-21 09:11:43 +04:00
|
|
|
mFrames.AppendFrames(nsnull, overflowFrames);
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|
|
|
|
|
1999-10-29 18:34:01 +04:00
|
|
|
// Now repair our first frames style context (since we only reflow
|
|
|
|
// one frame there is no point in doing any other ones until they
|
|
|
|
// are reflowed)
|
1999-04-28 02:05:02 +04:00
|
|
|
nsIFrame* kid = mFrames.FirstChild();
|
1999-04-29 04:16:44 +04:00
|
|
|
if (kid) {
|
2003-02-22 03:32:13 +03:00
|
|
|
nsRefPtr<nsStyleContext> sc;
|
2003-06-27 22:13:48 +04:00
|
|
|
nsIContent* kidContent = kid->GetContent();
|
1999-10-29 18:34:01 +04:00
|
|
|
if (kidContent) {
|
2001-10-31 05:53:47 +03:00
|
|
|
NS_ASSERTION(kidContent->IsContentOfType(nsIContent::eTEXT),
|
|
|
|
"should contain only text nodes");
|
2004-01-28 03:18:22 +03:00
|
|
|
sc = aPresContext->StyleSet()->ResolveStyleForNonElement(mStyleContext);
|
1999-10-29 18:34:01 +04:00
|
|
|
if (sc) {
|
2006-03-09 21:55:21 +03:00
|
|
|
kid->SetStyleContext(sc);
|
1999-10-29 18:34:01 +04:00
|
|
|
}
|
|
|
|
}
|
1999-04-29 04:16:44 +04:00
|
|
|
}
|
1999-04-28 02:05:02 +04:00
|
|
|
}
|