2007-03-22 10:30:00 -07:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2012-05-21 04:12:37 -07:00
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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2007-03-22 10:30:00 -07:00
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/* rendering object for CSS :first-letter pseudo-element */
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#include "nsCOMPtr.h"
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2008-04-11 01:44:58 -07:00
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#include "nsFirstLetterFrame.h"
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2007-03-22 10:30:00 -07:00
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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#include "nsIContent.h"
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#include "nsLineLayout.h"
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#include "nsGkAtoms.h"
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#include "nsAutoPtr.h"
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#include "nsStyleSet.h"
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#include "nsFrameManager.h"
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2010-03-17 10:30:30 -07:00
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#include "nsPlaceholderFrame.h"
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#include "nsCSSFrameConstructor.h"
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2007-03-22 10:30:00 -07:00
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2011-10-18 05:51:58 -07:00
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using namespace::mozilla;
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2007-03-22 10:30:00 -07:00
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nsIFrame*
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NS_NewFirstLetterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsFirstLetterFrame(aContext);
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}
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2009-09-12 09:49:24 -07:00
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NS_IMPL_FRAMEARENA_HELPERS(nsFirstLetterFrame)
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2010-11-27 07:21:00 -08:00
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NS_QUERYFRAME_HEAD(nsFirstLetterFrame)
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NS_QUERYFRAME_ENTRY(nsFirstLetterFrame)
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2011-12-27 12:18:48 -08:00
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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2010-11-27 07:21:00 -08:00
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2007-03-22 10:30:00 -07:00
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#ifdef NS_DEBUG
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NS_IMETHODIMP
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nsFirstLetterFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Letter"), aResult);
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}
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#endif
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nsIAtom*
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nsFirstLetterFrame::GetType() const
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{
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return nsGkAtoms::letterFrame;
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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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2011-12-27 12:18:48 -08:00
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NS_IMETHODIMP
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nsFirstLetterFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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return BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
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}
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2007-03-22 10:30:00 -07:00
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NS_IMETHODIMP
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nsFirstLetterFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsRefPtr<nsStyleContext> newSC;
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if (aPrevInFlow) {
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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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nsStyleContext* parentStyleContext = mStyleContext->GetParent();
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if (parentStyleContext) {
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newSC = mStyleContext->GetRuleNode()->GetPresContext()->StyleSet()->
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ResolveStyleForNonElement(parentStyleContext);
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if (newSC)
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SetStyleContextWithoutNotification(newSC);
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}
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}
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2011-12-27 12:18:48 -08:00
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return nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
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2007-03-22 10:30:00 -07:00
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}
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NS_IMETHODIMP
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2011-08-24 13:54:30 -07:00
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nsFirstLetterFrame::SetInitialChildList(ChildListID aListID,
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2009-07-28 05:53:20 -07:00
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nsFrameList& aChildList)
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2007-03-22 10:30:00 -07:00
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{
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2007-03-30 14:11:41 -07:00
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nsFrameManager *frameManager = PresContext()->FrameManager();
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2007-03-22 10:30:00 -07:00
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2009-07-28 05:53:20 -07:00
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for (nsFrameList::Enumerator e(aChildList); !e.AtEnd(); e.Next()) {
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NS_ASSERTION(e.get()->GetParent() == this, "Unexpected parent");
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2010-04-01 23:07:43 -07:00
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frameManager->ReparentStyleContext(e.get());
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2007-03-22 10:30:00 -07:00
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}
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2009-07-28 05:53:20 -07:00
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mFrames.SetFrames(aChildList);
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2007-03-22 10:30:00 -07:00
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return NS_OK;
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}
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NS_IMETHODIMP
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nsFirstLetterFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
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2011-09-28 23:19:26 -07:00
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bool inHint,
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2007-03-22 10:30:00 -07:00
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PRInt32* outFrameContentOffset,
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nsIFrame **outChildFrame)
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{
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nsIFrame *kid = mFrames.FirstChild();
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if (kid)
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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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// Needed for non-floating first-letter frames and for the continuations
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// following the first-letter that we also use nsFirstLetterFrame for.
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/* virtual */ void
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2011-04-07 18:04:40 -07:00
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nsFirstLetterFrame::AddInlineMinWidth(nsRenderingContext *aRenderingContext,
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2007-03-22 10:30:00 -07:00
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nsIFrame::InlineMinWidthData *aData)
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{
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DoInlineIntrinsicWidth(aRenderingContext, aData, nsLayoutUtils::MIN_WIDTH);
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}
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// Needed for non-floating first-letter frames and for the continuations
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// following the first-letter that we also use nsFirstLetterFrame for.
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/* virtual */ void
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2011-04-07 18:04:40 -07:00
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nsFirstLetterFrame::AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
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2007-03-22 10:30:00 -07:00
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nsIFrame::InlinePrefWidthData *aData)
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{
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DoInlineIntrinsicWidth(aRenderingContext, aData, nsLayoutUtils::PREF_WIDTH);
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}
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// Needed for floating first-letter frames.
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/* virtual */ nscoord
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2011-04-07 18:04:40 -07:00
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nsFirstLetterFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
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2007-03-22 10:30:00 -07:00
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{
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return nsLayoutUtils::MinWidthFromInline(this, aRenderingContext);
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}
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// Needed for floating first-letter frames.
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/* virtual */ nscoord
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2011-04-07 18:04:40 -07:00
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nsFirstLetterFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
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2007-03-22 10:30:00 -07:00
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{
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return nsLayoutUtils::PrefWidthFromInline(this, aRenderingContext);
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}
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2007-07-18 21:29:59 -07:00
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/* virtual */ nsSize
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2011-04-07 18:04:40 -07:00
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nsFirstLetterFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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2007-07-18 21:29:59 -07:00
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder, nsSize aPadding,
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2012-03-16 11:01:05 -07:00
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PRUint32 aFlags)
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2007-07-18 21:29:59 -07:00
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{
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if (GetPrevInFlow()) {
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// We're wrapping the text *after* the first letter, so behave like an
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// inline frame.
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return nsSize(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
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}
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2011-12-27 12:18:48 -08:00
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return nsContainerFrame::ComputeSize(aRenderingContext,
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2012-03-16 11:01:05 -07:00
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aCBSize, aAvailableWidth, aMargin, aBorder, aPadding, aFlags);
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2007-07-18 21:29:59 -07:00
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}
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2007-03-22 10:30:00 -07:00
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NS_IMETHODIMP
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nsFirstLetterFrame::Reflow(nsPresContext* aPresContext,
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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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DO_GLOBAL_REFLOW_COUNT("nsFirstLetterFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aReflowStatus);
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nsresult rv = NS_OK;
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// Grab overflow list
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DrainOverflowFrames(aPresContext);
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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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2007-12-12 13:51:00 -08:00
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NS_ASSERTION(availSize.width != NS_UNCONSTRAINEDSIZE,
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"should no longer use unconstrained widths");
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availSize.width -= lr;
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2007-03-22 10:30:00 -07:00
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if (NS_UNCONSTRAINEDSIZE != availSize.height) {
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availSize.height -= tb;
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}
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// Reflow the child
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if (!aReflowState.mLineLayout) {
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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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nsHTMLReflowState rs(aPresContext, aReflowState, kid, availSize);
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nsLineLayout ll(aPresContext, nsnull, &aReflowState, nsnull);
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2011-10-18 05:51:58 -07:00
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// For unicode-bidi: plaintext, we need to get the direction of the line
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// from the resolved paragraph level of the child, not the block frame,
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// because the block frame could be split by hard line breaks into
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// multiple paragraphs with different base direction
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PRUint8 direction;
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nsIFrame* containerFrame = ll.GetLineContainerFrame();
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if (containerFrame->GetStyleTextReset()->mUnicodeBidi &
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NS_STYLE_UNICODE_BIDI_PLAINTEXT) {
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FramePropertyTable *propTable = aPresContext->PropertyTable();
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direction = NS_PTR_TO_INT32(propTable->Get(kid, BaseLevelProperty())) & 1;
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} else {
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direction = containerFrame->GetStyleVisibility()->mDirection;
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}
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2007-12-12 13:51:00 -08:00
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ll.BeginLineReflow(bp.left, bp.top, availSize.width, NS_UNCONSTRAINEDSIZE,
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2011-10-18 05:51:58 -07:00
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false, true, direction);
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2007-03-22 10:30:00 -07:00
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rs.mLineLayout = ≪
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2011-10-17 07:59:28 -07:00
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ll.SetInFirstLetter(true);
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ll.SetFirstLetterStyleOK(true);
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2007-03-22 10:30:00 -07:00
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kid->WillReflow(aPresContext);
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kid->Reflow(aPresContext, aMetrics, rs, aReflowStatus);
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ll.EndLineReflow();
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2011-10-17 07:59:28 -07:00
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ll.SetInFirstLetter(false);
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2011-08-03 11:30:58 -07:00
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// In the floating first-letter case, we need to set this ourselves;
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// nsLineLayout::BeginSpan will set it in the other case
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mBaseline = aMetrics.ascent;
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2007-03-22 10:30:00 -07:00
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}
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else {
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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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2011-09-28 23:19:26 -07:00
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bool pushedFrame;
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2007-03-22 10:30:00 -07:00
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2009-01-04 16:36:56 -08:00
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ll->SetInFirstLetter(
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2009-10-29 14:17:56 -07:00
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mStyleContext->GetPseudo() == nsCSSPseudoElements::firstLetter);
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2011-08-03 11:30:58 -07:00
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ll->BeginSpan(this, &aReflowState, bp.left, availSize.width, &mBaseline);
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2007-03-22 10:30:00 -07:00
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ll->ReflowFrame(kid, aReflowStatus, &aMetrics, pushedFrame);
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2007-12-12 13:51:18 -08:00
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ll->EndSpan(this);
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2011-10-17 07:59:28 -07:00
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ll->SetInFirstLetter(false);
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2007-03-22 10:30:00 -07:00
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}
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// Place and size the child and update the output metrics
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kid->SetRect(nsRect(bp.left, bp.top, aMetrics.width, aMetrics.height));
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2008-04-11 01:44:58 -07:00
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kid->FinishAndStoreOverflow(&aMetrics);
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2007-03-22 10:30:00 -07:00
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kid->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
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2008-04-11 01:44:58 -07:00
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2007-03-22 10:30:00 -07:00
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aMetrics.width += lr;
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aMetrics.height += tb;
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aMetrics.ascent += bp.top;
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2008-04-11 01:44:58 -07:00
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// Ensure that the overflow rect contains the child textframe's overflow rect.
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// Note that if this is floating, the overline/underline drawable area is in
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// the overflow rect of the child textframe.
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2010-10-06 21:25:46 -07:00
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aMetrics.UnionOverflowAreasWithDesiredBounds();
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ConsiderChildOverflow(aMetrics.mOverflowAreas, kid);
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2007-03-22 10:30:00 -07:00
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2011-07-19 05:20:33 -07:00
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if (!NS_INLINE_IS_BREAK_BEFORE(aReflowStatus)) {
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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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if (aReflowState.mLineLayout) {
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2011-10-17 07:59:28 -07:00
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aReflowState.mLineLayout->SetFirstLetterStyleOK(false);
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2010-03-17 10:30:30 -07:00
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}
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2011-07-19 05:20:33 -07:00
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nsIFrame* kidNextInFlow = kid->GetNextInFlow();
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if (kidNextInFlow) {
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// Remove all of the childs next-in-flows
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static_cast<nsContainerFrame*>(kidNextInFlow->GetParent())
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2011-10-17 07:59:28 -07:00
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->DeleteNextInFlowChild(aPresContext, kidNextInFlow, true);
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2011-07-19 05:20:33 -07:00
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}
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}
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else {
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// Create a continuation for the child frame if it doesn't already
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// have one.
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2012-02-21 15:50:16 -08:00
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if (!IsFloating()) {
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2011-07-19 05:20:33 -07:00
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nsIFrame* nextInFlow;
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rv = CreateNextInFlow(aPresContext, kid, nextInFlow);
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if (NS_FAILED(rv)) {
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return rv;
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}
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// And then push it to our overflow list
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const nsFrameList& overflow = mFrames.RemoveFramesAfter(kid);
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if (overflow.NotEmpty()) {
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SetOverflowFrames(aPresContext, overflow);
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}
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} else if (!kid->GetNextInFlow()) {
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// For floating first letter frames (if a continuation wasn't already
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// created for us) we need to put the continuation with the rest of the
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// text that the first letter frame was made out of.
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nsIFrame* continuation;
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rv = CreateContinuationForFloatingParent(aPresContext, kid,
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2011-10-17 07:59:28 -07:00
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&continuation, true);
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2010-03-17 10:30:30 -07:00
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}
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2007-03-22 10:30:00 -07:00
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}
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}
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2008-04-11 01:44:58 -07:00
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FinishAndStoreOverflow(&aMetrics);
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2007-03-22 10:30:00 -07:00
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NS_FRAME_SET_TRUNCATION(aReflowStatus, aReflowState, aMetrics);
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return rv;
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}
|
|
|
|
|
2011-09-28 23:19:26 -07:00
|
|
|
/* virtual */ bool
|
2007-03-22 10:30:00 -07:00
|
|
|
nsFirstLetterFrame::CanContinueTextRun() const
|
|
|
|
{
|
|
|
|
// We can continue a text run through a first-letter frame.
|
2011-10-17 07:59:28 -07:00
|
|
|
return true;
|
2007-03-22 10:30:00 -07:00
|
|
|
}
|
|
|
|
|
2010-03-17 10:30:30 -07:00
|
|
|
nsresult
|
|
|
|
nsFirstLetterFrame::CreateContinuationForFloatingParent(nsPresContext* aPresContext,
|
|
|
|
nsIFrame* aChild,
|
|
|
|
nsIFrame** aContinuation,
|
2011-09-28 23:19:26 -07:00
|
|
|
bool aIsFluid)
|
2010-03-17 10:30:30 -07:00
|
|
|
{
|
2012-02-21 15:50:16 -08:00
|
|
|
NS_ASSERTION(IsFloating(),
|
2010-03-17 10:30:30 -07:00
|
|
|
"can only call this on floating first letter frames");
|
|
|
|
NS_PRECONDITION(aContinuation, "bad args");
|
|
|
|
|
|
|
|
*aContinuation = nsnull;
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
|
|
|
|
nsIPresShell* presShell = aPresContext->PresShell();
|
|
|
|
nsPlaceholderFrame* placeholderFrame =
|
|
|
|
presShell->FrameManager()->GetPlaceholderFrameFor(this);
|
|
|
|
nsIFrame* parent = placeholderFrame->GetParent();
|
|
|
|
|
|
|
|
nsIFrame* continuation;
|
|
|
|
rv = presShell->FrameConstructor()->
|
|
|
|
CreateContinuingFrame(aPresContext, aChild, parent, &continuation, aIsFluid);
|
|
|
|
if (NS_FAILED(rv) || !continuation) {
|
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
|
|
|
// The continuation will have gotten the first letter style from it's
|
|
|
|
// prev continuation, so we need to repair the style context so it
|
|
|
|
// doesn't have the first letter styling.
|
|
|
|
nsStyleContext* parentSC = this->GetStyleContext()->GetParent();
|
|
|
|
if (parentSC) {
|
|
|
|
nsRefPtr<nsStyleContext> newSC;
|
|
|
|
newSC = presShell->StyleSet()->ResolveStyleForNonElement(parentSC);
|
|
|
|
if (newSC) {
|
|
|
|
continuation->SetStyleContext(newSC);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
//XXX Bidi may not be involved but we have to use the list name
|
2011-08-24 13:54:30 -07:00
|
|
|
// kNoReflowPrincipalList because this is just like creating a continuation
|
2010-03-17 10:30:30 -07:00
|
|
|
// except we have to insert it in a different place and we don't want a
|
|
|
|
// reflow command to try to be issued.
|
|
|
|
nsFrameList temp(continuation, continuation);
|
2011-08-24 13:54:30 -07:00
|
|
|
rv = parent->InsertFrames(kNoReflowPrincipalList, placeholderFrame, temp);
|
2010-03-17 10:30:30 -07:00
|
|
|
|
|
|
|
*aContinuation = continuation;
|
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
2007-03-22 10:30:00 -07:00
|
|
|
void
|
|
|
|
nsFirstLetterFrame::DrainOverflowFrames(nsPresContext* aPresContext)
|
|
|
|
{
|
2009-07-28 05:51:09 -07:00
|
|
|
nsAutoPtr<nsFrameList> overflowFrames;
|
2007-03-22 10:30:00 -07:00
|
|
|
|
|
|
|
// Check for an overflow list with our prev-in-flow
|
|
|
|
nsFirstLetterFrame* prevInFlow = (nsFirstLetterFrame*)GetPrevInFlow();
|
|
|
|
if (nsnull != prevInFlow) {
|
2009-07-28 05:51:09 -07:00
|
|
|
overflowFrames = prevInFlow->StealOverflowFrames();
|
2007-03-22 10:30:00 -07:00
|
|
|
if (overflowFrames) {
|
|
|
|
NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
|
|
|
|
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
|
|
// views need to be reparented.
|
2011-04-19 04:55:11 -07:00
|
|
|
nsContainerFrame::ReparentFrameViewList(aPresContext, *overflowFrames,
|
|
|
|
prevInFlow, this);
|
2009-07-28 05:51:09 -07:00
|
|
|
mFrames.InsertFrames(this, nsnull, *overflowFrames);
|
2007-03-22 10:30:00 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// It's also possible that we have an overflow list for ourselves
|
2009-07-28 05:51:09 -07:00
|
|
|
overflowFrames = StealOverflowFrames();
|
2007-03-22 10:30:00 -07:00
|
|
|
if (overflowFrames) {
|
|
|
|
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
|
2009-07-28 05:51:09 -07:00
|
|
|
mFrames.AppendFrames(nsnull, *overflowFrames);
|
2007-03-22 10:30:00 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
// 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)
|
|
|
|
nsIFrame* kid = mFrames.FirstChild();
|
|
|
|
if (kid) {
|
|
|
|
nsRefPtr<nsStyleContext> sc;
|
|
|
|
nsIContent* kidContent = kid->GetContent();
|
|
|
|
if (kidContent) {
|
|
|
|
NS_ASSERTION(kidContent->IsNodeOfType(nsINode::eTEXT),
|
|
|
|
"should contain only text nodes");
|
|
|
|
sc = aPresContext->StyleSet()->ResolveStyleForNonElement(mStyleContext);
|
|
|
|
if (sc) {
|
|
|
|
kid->SetStyleContext(sc);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2010-08-31 11:54:44 -07:00
|
|
|
|
|
|
|
nscoord
|
|
|
|
nsFirstLetterFrame::GetBaseline() const
|
|
|
|
{
|
|
|
|
return mBaseline;
|
|
|
|
}
|