new
git-svn-id: svn://10.0.0.236/trunk@29535 18797224-902f-48f8-a5cc-f745e15eee43
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kipp%netscape.com
281
mozilla/layout/generic/nsFirstLetterFrame.cpp
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281
mozilla/layout/generic/nsFirstLetterFrame.cpp
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/* -*- 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 License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsHTMLContainerFrame.h"
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#include "nsIPresContext.h"
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#include "nsIStyleContext.h"
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#include "nsLineLayout.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLIIDs.h"
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#include "nsLayoutAtoms.h"
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#define nsFirstLetterFrameSuper nsHTMLContainerFrame
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class nsFirstLetterFrame : public nsFirstLetterFrameSuper {
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public:
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nsFirstLetterFrame();
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NS_IMETHOD Init(nsIPresContext& aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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NS_IMETHOD 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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NS_IMETHOD FindTextRuns(nsLineLayout& aLineLayout);
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protected:
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virtual PRIntn GetSkipSides() const;
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void DrainOverflowFrames(nsIPresContext* aPresContext);
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};
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nsresult
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NS_NewFirstLetterFrame(nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(nsnull != aNewFrame, "null 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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nsFirstLetterFrame* it = new nsFirstLetterFrame;
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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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nsFirstLetterFrame::nsFirstLetterFrame()
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{
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}
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NS_IMETHODIMP
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nsFirstLetterFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Letter", aResult);
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}
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NS_IMETHODIMP
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nsFirstLetterFrame::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::letterFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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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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nsFirstLetterFrame::Init(nsIPresContext& aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv;
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nsIStyleContext* newSC = nsnull;
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if (aPrevInFlow) {
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// Get proper style context for ourselves
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nsIStyleContext* parentStyleContext;
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parentStyleContext = aContext->GetParent();
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if (parentStyleContext) {
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nsIAtom* atom = aPrevInFlow
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? nsHTMLAtoms::mozLetterFrame
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: nsHTMLAtoms::firstLetterPseudo;
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rv = aPresContext.ResolvePseudoStyleContextFor(aContent, atom,
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parentStyleContext,
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PR_FALSE, &newSC);
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NS_RELEASE(parentStyleContext);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (nsnull != newSC) {
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if (newSC == aContext) {
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NS_RELEASE(newSC);
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}
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else {
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aContext = newSC;
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}
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}
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}
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}
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rv = nsFirstLetterFrameSuper::Init(aPresContext, aContent, aParent,
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aContext, aPrevInFlow);
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NS_IF_RELEASE(newSC);
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return rv;
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}
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NS_IMETHODIMP
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nsFirstLetterFrame::SetInitialChildList(nsIPresContext& aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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mFrames.SetFrames(aChildList);
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aChildList->ReResolveStyleContext(&aPresContext, mStyleContext,
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NS_STYLE_HINT_REFLOW,
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nsnull, nsnull);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsFirstLetterFrame::FindTextRuns(nsLineLayout& aLineLayout)
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{
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nsIFrame* frame = mFrames.FirstChild();
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while (nsnull != frame) {
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nsIHTMLReflow* ihr;
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nsresult rv = frame->QueryInterface(kIHTMLReflowIID, (void**)&ihr);
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if (NS_SUCCEEDED(rv)) {
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ihr->FindTextRuns(aLineLayout);
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}
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frame->GetNextSibling(&frame);
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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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nsFirstLetterFrame::Reflow(nsIPresContext& 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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// Grab overflow list
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DrainOverflowFrames(&aPresContext);
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nsIFrame* kid = mFrames.FirstChild();
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nsIHTMLReflow* htmlReflow;
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nsresult rv = kid->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
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if (NS_FAILED(rv)) {
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return rv;
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}
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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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availSize.width -= tb;
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}
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// Reflow the child
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nsHTMLReflowState rs(aPresContext, aReflowState, kid, availSize);
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htmlReflow->WillReflow(aPresContext);
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if (!rs.lineLayout) {
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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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nsLineLayout ll(aPresContext, nsnull, &aReflowState,
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nsnull != aMetrics.maxElementSize);
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ll.BeginLineReflow(0, 0, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE,
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PR_FALSE, PR_TRUE);
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rs.lineLayout = ≪
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ll.SetFirstLetterStyleOK(PR_TRUE);
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htmlReflow->Reflow(aPresContext, aMetrics, rs, aReflowStatus);
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ll.EndLineReflow();
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}
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else {
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htmlReflow->Reflow(aPresContext, aMetrics, rs, aReflowStatus);
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}
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// Place and size the child and update the output metrics
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kid->MoveTo(bp.left, bp.top);
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kid->SizeTo(aMetrics.width, aMetrics.height);
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aMetrics.width += lr;
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aMetrics.height += tb;
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if (aMetrics.maxElementSize) {
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aMetrics.maxElementSize->width += lr;
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aMetrics.maxElementSize->height += tb;
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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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nsIFrame* kidNextInFlow;
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kid->GetNextInFlow(&kidNextInFlow);
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if (nsnull != kidNextInFlow) {
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// Remove all of the childs next-in-flows
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DeleteChildsNextInFlow(aPresContext, kid);
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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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nsIFrame* nextInFlow;
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rv = CreateNextInFlow(aPresContext, this, 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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if (nextInFlow) {
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kid->SetNextSibling(nsnull);
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mOverflowFrames.SetFrames(nextInFlow);
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}
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}
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return rv;
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}
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void
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nsFirstLetterFrame::DrainOverflowFrames(nsIPresContext* aPresContext)
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{
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// Check for an overflow list with our prev-in-flow
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nsFirstLetterFrame* prevInFlow = (nsFirstLetterFrame*)mPrevInFlow;
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if (nsnull != prevInFlow) {
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if (prevInFlow->mOverflowFrames.NotEmpty()) {
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NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
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// When pushing and pulling frames we need to check for whether any
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// views need to be reparented.
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nsIFrame* f = prevInFlow->mOverflowFrames.FirstChild();
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while (f) {
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nsHTMLContainerFrame::ReparentFrameView(f, prevInFlow, this);
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f->GetNextSibling(&f);
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}
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mFrames.InsertFrames(this, nsnull, prevInFlow->mOverflowFrames);
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}
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}
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// It's also possible that we have an overflow list for ourselves
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if (mOverflowFrames.NotEmpty()) {
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NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
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mFrames.AppendFrames(nsnull, mOverflowFrames);
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}
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// Now repair our first frames style context
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nsIFrame* kid = mFrames.FirstChild();
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kid->ReResolveStyleContext(aPresContext, mStyleContext,
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NS_STYLE_HINT_REFLOW,
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nsnull, nsnull);
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}
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