зеркало из https://github.com/mozilla/gecko-dev.git
1208 строки
39 KiB
C++
1208 строки
39 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla 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
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsCOMPtr.h"
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#include "nsInlineFrame.h"
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#include "nsHTMLIIDs.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLParts.h"
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#include "nsIStyleContext.h"
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#include "nsIPresShell.h"
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#include "nsIPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsIFontMetrics.h"
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#include "nsAbsoluteContainingBlock.h"
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#include "nsLayoutAtoms.h"
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#ifdef DEBUG
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#undef NOISY_PUSHING
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#endif
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nsIID nsInlineFrame::kInlineFrameCID = NS_INLINE_FRAME_CID;
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//////////////////////////////////////////////////////////////////////
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// Basic nsInlineFrame methods
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nsresult
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NS_NewInlineFrame(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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nsInlineFrame* it = new (aPresShell) nsInlineFrame;
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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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nsInlineFrame::nsInlineFrame()
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{
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}
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NS_IMETHODIMP
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nsInlineFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (nsnull == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kInlineFrameCID)) {
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nsInlineFrame* tmp = this;
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*aInstancePtr = (void*) tmp;
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return NS_OK;
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}
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return nsInlineFrameSuper::QueryInterface(aIID, aInstancePtr);
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}
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#ifdef DEBUG
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NS_IMETHODIMP
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nsInlineFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Inline", aResult);
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}
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#endif
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NS_IMETHODIMP
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nsInlineFrame::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::inlineFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsInlineFrame::AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList)
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{
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if (nsnull != aListName) {
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return NS_ERROR_INVALID_ARG;
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}
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if (aFrameList) {
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mFrames.AppendFrames(this, aFrameList);
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// Ask the parent frame to reflow me.
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ReflowDirtyChild(&aPresShell, nsnull);
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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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nsInlineFrame::InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList)
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{
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if (nsnull != aListName) {
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#ifdef IBMBIDI
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if (aListName != nsLayoutAtoms::nextBidi)
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#endif
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return NS_ERROR_INVALID_ARG;
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}
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if (aFrameList) {
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// Insert frames after aPrevFrame
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mFrames.InsertFrames(this, aPrevFrame, aFrameList);
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#ifdef IBMBIDI
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if (nsnull == aListName)
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#endif
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// Ask the parent frame to reflow me.
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ReflowDirtyChild(&aPresShell, nsnull);
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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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nsInlineFrame::RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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if (nsnull != aListName) {
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#ifdef IBMBIDI
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if (nsLayoutAtoms::nextBidi != aListName)
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#endif
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return NS_ERROR_INVALID_ARG;
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}
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if (aOldFrame) {
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// Loop and destroy the frame and all of its continuations.
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PRBool generateReflowCommand = PR_FALSE;
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nsIFrame* oldFrameParent;
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aOldFrame->GetParent(&oldFrameParent);
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nsInlineFrame* parent = (nsInlineFrame*) oldFrameParent;
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while (nsnull != aOldFrame) {
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#ifdef IBMBIDI
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if (nsLayoutAtoms::nextBidi != aListName) {
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#endif
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// If the frame being removed has zero size then don't bother
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// generating a reflow command, otherwise make sure we do.
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nsRect bbox;
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aOldFrame->GetRect(bbox);
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if (bbox.width || bbox.height) {
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generateReflowCommand = PR_TRUE;
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}
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#ifdef IBMBIDI
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}
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#endif
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// When the parent is an inline frame we have a simple task - just
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// remove the frame from its parents list and generate a reflow
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// command.
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nsIFrame* oldFrameNextInFlow;
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aOldFrame->GetNextInFlow(&oldFrameNextInFlow);
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nsSplittableType st;
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aOldFrame->IsSplittable(st);
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if (NS_FRAME_NOT_SPLITTABLE != st) {
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nsSplittableFrame::RemoveFromFlow(aOldFrame);
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}
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parent->mFrames.DestroyFrame(aPresContext, aOldFrame);
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aOldFrame = oldFrameNextInFlow;
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if (nsnull != aOldFrame) {
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aOldFrame->GetParent((nsIFrame**) &parent);
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}
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}
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if (generateReflowCommand) {
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// Ask the parent frame to reflow me.
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ReflowDirtyChild(&aPresShell, nsnull);
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}
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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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nsInlineFrame::ReplaceFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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if (nsnull != aListName) {
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return NS_ERROR_INVALID_ARG;
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}
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if (!aOldFrame || !aNewFrame) {
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return NS_ERROR_INVALID_ARG;
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}
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// Replace the old frame with the new frame in the list, then remove the old frame
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mFrames.ReplaceFrame(this, aOldFrame, aNewFrame);
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aOldFrame->Destroy(aPresContext);
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// Ask the parent frame to reflow me.
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ReflowDirtyChild(&aPresShell, nsnull);
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return NS_OK;
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}
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//////////////////////////////////////////////////////////////////////
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// Reflow methods
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NS_IMETHODIMP
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nsInlineFrame::Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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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("nsInlineFrame", aReflowState.reason);
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if (nsnull == aReflowState.mLineLayout) {
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return NS_ERROR_INVALID_ARG;
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}
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PRBool lazilySetParentPointer = PR_FALSE;
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// Check for an overflow list with our prev-in-flow
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nsInlineFrame* prevInFlow = (nsInlineFrame*)mPrevInFlow;
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if (nsnull != prevInFlow) {
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nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE);
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if (prevOverflowFrames) {
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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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nsHTMLContainerFrame::ReparentFrameViewList(aPresContext, prevOverflowFrames,
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prevInFlow, this);
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if (aReflowState.reason == eReflowReason_Initial) {
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// If it's the initial reflow, then our child list must be empty, so
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// just set the child list rather than calling InsertFrame(). This avoids
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// having to get the last child frame in the list.
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// Note that we don't set the parent pointer for the new frames. Instead wait
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// to do this until we actually reflow the frame. If the overflow list contains
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// thousands of frames this is a big performance issue (see bug #5588)
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NS_ASSERTION(mFrames.IsEmpty(), "child list is not empty for initial reflow");
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mFrames.SetFrames(prevOverflowFrames);
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lazilySetParentPointer = PR_TRUE;
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} else {
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// Insert the new frames at the beginning of the child list
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// and set their parent pointer
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mFrames.InsertFrames(this, nsnull, prevOverflowFrames);
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}
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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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#ifdef DEBUG
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if (aReflowState.reason == eReflowReason_Initial) {
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// If it's our initial reflow, then we should not have an overflow list.
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// However, add an assertion in case we get reflowed more than once with
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// the initial reflow reason
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nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_FALSE);
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NS_ASSERTION(!overflowFrames, "overflow list is not empty for initial reflow");
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}
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#endif
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if (aReflowState.reason != eReflowReason_Initial) {
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nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE);
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if (overflowFrames) {
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NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
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// Because we lazily set the parent pointer of child frames we get from
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// our prev-in-flow's overflow list, it's possible that we have not set
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// the parent pointer for these frames. Check the first frame to see, and
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// if we haven't set the parent pointer then set it now
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nsIFrame* parent;
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overflowFrames->GetParent(&parent);
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mFrames.AppendFrames(parent == this ? nsnull : this, overflowFrames);
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}
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}
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if (IsFrameTreeTooDeep(aReflowState, aMetrics)) {
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#ifdef DEBUG_kipp
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{
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extern char* nsPresShell_ReflowStackPointerTop;
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char marker;
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char* newsp = (char*) ▮
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printf("XXX: frame tree is too deep; approx stack size = %d\n",
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nsPresShell_ReflowStackPointerTop - newsp);
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}
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#endif
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aStatus = NS_FRAME_COMPLETE;
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return NS_OK;
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}
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// Set our own reflow state (additional state above and beyond
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// aReflowState)
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InlineReflowState irs;
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irs.mPrevFrame = nsnull;
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irs.mNextInFlow = (nsInlineFrame*) mNextInFlow;
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irs.mNextRCFrame = nsnull;
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irs.mSetParentPointer = lazilySetParentPointer;
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if (eReflowReason_Incremental == aReflowState.reason) {
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// Peel off the next frame in the path if this is an incremental
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// reflow aimed at one of the children.
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nsIFrame* target;
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aReflowState.reflowCommand->GetTarget(target);
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if (this != target) {
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aReflowState.reflowCommand->GetNext(irs.mNextRCFrame);
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}
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}
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nsresult rv;
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if (mFrames.IsEmpty()) {
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// Try to pull over one frame before starting so that we know
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// whether we have an anonymous block or not.
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PRBool complete;
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(void) PullOneFrame(aPresContext, irs, &complete);
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}
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rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus);
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// Note: the line layout code will properly compute our
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// NS_FRAME_OUTSIDE_CHILDREN state for us.
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return rv;
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}
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NS_IMETHODIMP
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nsInlineFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
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{
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// We can continue a text run through an inline frame
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aContinueTextRun = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsInlineFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild)
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{
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// The inline container frame does not handle the reflow
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// request. It passes it up to its parent container.
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// If you don't already have dirty children,
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if (!(mState & NS_FRAME_HAS_DIRTY_CHILDREN)) {
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if (mParent) {
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// Record that you are dirty and have dirty children
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mState |= NS_FRAME_IS_DIRTY;
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mState |= NS_FRAME_HAS_DIRTY_CHILDREN;
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// Pass the reflow request up to the parent
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mParent->ReflowDirtyChild(aPresShell, this);
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}
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else {
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NS_ERROR("No parent to pass the reflow request up to.");
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}
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}
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return NS_OK;
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}
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nsresult
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nsInlineFrame::ReflowFrames(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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InlineReflowState& irs,
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nsHTMLReflowMetrics& aMetrics,
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nsReflowStatus& aStatus)
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{
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nsresult rv = NS_OK;
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aStatus = NS_FRAME_COMPLETE;
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nsLineLayout* lineLayout = aReflowState.mLineLayout;
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nscoord leftEdge = 0;
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if (nsnull == mPrevInFlow) {
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leftEdge = aReflowState.mComputedBorderPadding.left;
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}
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nscoord availableWidth = aReflowState.availableWidth;
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if (NS_UNCONSTRAINEDSIZE != availableWidth) {
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// Subtract off left and right border+padding from availableWidth
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availableWidth -= leftEdge;
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availableWidth -= aReflowState.mComputedBorderPadding.right;
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}
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lineLayout->BeginSpan(this, &aReflowState, leftEdge, leftEdge + availableWidth);
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// First reflow our current children
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nsIFrame* frame = mFrames.FirstChild();
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PRBool done = PR_FALSE;
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while (nsnull != frame) {
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PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
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// Check if we should lazily set the child frame's parent pointer
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if (irs.mSetParentPointer) {
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frame->SetParent(this);
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// We also need to check if frame has a next-in-flow. It it does, then set
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// its parent frame pointer, too. Otherwise, if we reflow frame and it's
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// complete we'll fail when deleting its next-in-flow which is no longer
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// needed. This scenario doesn't happen often, but it can happen
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nsIFrame* nextInFlow;
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frame->GetNextInFlow(&nextInFlow);
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while (nextInFlow) {
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// Since we only do lazy setting of parent pointers for the frame's
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// initial reflow, this frame can't have a next-in-flow. That means
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// the continuing child frame must be in our child list as well. If
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// not, then something is wrong
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NS_ASSERTION(mFrames.ContainsFrame(nextInFlow), "unexpected flow");
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nextInFlow->SetParent(this);
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nextInFlow->GetNextInFlow(&nextInFlow);
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}
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}
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rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
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if (NS_FAILED(rv)) {
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done = PR_TRUE;
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break;
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}
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if (NS_FRAME_COMPLETE != aStatus) {
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if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) {
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done = PR_TRUE;
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break;
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}
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}
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irs.mPrevFrame = frame;
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frame->GetNextSibling(&frame);
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}
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// Attempt to pull frames from our next-in-flow until we can't
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if (!done && (nsnull != mNextInFlow)) {
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while (!done) {
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PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
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PRBool isComplete;
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frame = PullOneFrame(aPresContext, irs, &isComplete);
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#ifdef NOISY_PUSHING
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printf("%p pulled up %p\n", this, frame);
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#endif
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if (nsnull == frame) {
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if (!isComplete) {
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aStatus = NS_FRAME_NOT_COMPLETE;
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}
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break;
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}
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rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
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if (NS_FAILED(rv)) {
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done = PR_TRUE;
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break;
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}
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if (NS_FRAME_COMPLETE != aStatus) {
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if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) {
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done = PR_TRUE;
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break;
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}
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}
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irs.mPrevFrame = frame;
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}
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}
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#ifdef DEBUG
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if (NS_FRAME_COMPLETE == aStatus) {
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// We can't be complete AND have overflow frames!
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nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_FALSE);
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NS_ASSERTION(!overflowFrames, "whoops");
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}
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#endif
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// If after reflowing our children they take up no area then make
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// sure that we don't either.
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//
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// Note: CSS demands that empty inline elements still affect the
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// line-height calculations. However, continuations of an inline
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// that are empty we force to empty so that things like collapsed
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// whitespace in an inline element don't affect the line-height.
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nsSize size;
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lineLayout->EndSpan(this, size, aMetrics.maxElementSize);
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if ((0 == size.height) && (0 == size.width) &&
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((nsnull != mPrevInFlow) || (nsnull != mNextInFlow))) {
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// This is a continuation of a previous inline. Therefore make
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// sure we don't affect the line-height.
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aMetrics.width = 0;
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aMetrics.height = 0;
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aMetrics.ascent = 0;
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aMetrics.descent = 0;
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if (nsnull != aMetrics.maxElementSize) {
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aMetrics.maxElementSize->width = 0;
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aMetrics.maxElementSize->height = 0;
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}
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}
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else {
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// Compute final width
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aMetrics.width = size.width;
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if (nsnull == mPrevInFlow) {
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aMetrics.width += aReflowState.mComputedBorderPadding.left;
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}
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if (NS_FRAME_IS_COMPLETE(aStatus)) {
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aMetrics.width += aReflowState.mComputedBorderPadding.right;
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}
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|
|
const nsStyleFont* font;
|
|
GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)font);
|
|
aReflowState.rendContext->SetFont(font->mFont);
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm));
|
|
|
|
// Compute final height of the frame.
|
|
//
|
|
// Do things the standard css2 way -- though it's hard to find it
|
|
// in the css2 spec! It's actually found in the css1 spec section
|
|
// 4.4 (you will have to read between the lines to really see
|
|
// it).
|
|
//
|
|
// The height of our box is the sum of our font size plus the top
|
|
// and bottom border and padding. The height of children do not
|
|
// affect our height.
|
|
fm->GetMaxAscent(aMetrics.ascent);
|
|
fm->GetMaxDescent(aMetrics.descent);
|
|
fm->GetHeight(aMetrics.height);
|
|
aMetrics.ascent += aReflowState.mComputedBorderPadding.top;
|
|
aMetrics.descent += aReflowState.mComputedBorderPadding.bottom;
|
|
aMetrics.height += aReflowState.mComputedBorderPadding.top +
|
|
aReflowState.mComputedBorderPadding.bottom;
|
|
|
|
// Note: we normally use the actual font height for computing the
|
|
// line-height raw value from the style context. On systems where
|
|
// they disagree the actual font height is more appropriate. This
|
|
// little hack lets us override that behavior to allow for more
|
|
// precise layout in the face of imprecise fonts.
|
|
if (nsHTMLReflowState::UseComputedHeight()) {
|
|
aMetrics.height = font->mFont.size +
|
|
aReflowState.mComputedBorderPadding.top +
|
|
aReflowState.mComputedBorderPadding.bottom;
|
|
}
|
|
}
|
|
|
|
// For now our overflow area is zero. The real value will be
|
|
// computed during vertical alignment of the line we are on.
|
|
aMetrics.mOverflowArea.x = 0;
|
|
aMetrics.mOverflowArea.y = 0;
|
|
aMetrics.mOverflowArea.width = aMetrics.width;
|
|
aMetrics.mOverflowArea.height = aMetrics.height;
|
|
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": metrics=%d,%d ascent=%d descent=%d\n",
|
|
aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent);
|
|
if (nsnull != aMetrics.maxElementSize) {
|
|
printf(" maxElementSize %d,%d\n",
|
|
aMetrics.maxElementSize->width, aMetrics.maxElementSize->height);
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
static
|
|
void SetContainsPercentAwareChild(nsIFrame *aFrame)
|
|
{
|
|
nsFrameState myFrameState;
|
|
aFrame->GetFrameState(&myFrameState);
|
|
aFrame->SetFrameState(myFrameState | NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD);
|
|
}
|
|
|
|
static
|
|
void MarkPercentAwareFrame(nsIPresContext *aPresContext,
|
|
nsInlineFrame *aInline,
|
|
nsIFrame *aFrame)
|
|
{
|
|
nsFrameState childFrameState;
|
|
aFrame->GetFrameState(&childFrameState);
|
|
if (childFrameState & NS_FRAME_REPLACED_ELEMENT)
|
|
{ // aFrame is a replaced element, check it's style
|
|
if (nsLineLayout::IsPercentageAwareReplacedElement(aPresContext, aFrame)) {
|
|
SetContainsPercentAwareChild(aInline);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nsIFrame *child;
|
|
aFrame->FirstChild(aPresContext, nsnull, &child);
|
|
if (child)
|
|
{ // aFrame is an inline container frame, check my frame state
|
|
if (childFrameState & NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD) {
|
|
SetContainsPercentAwareChild(aInline); // if a child container is effected, so am I
|
|
}
|
|
}
|
|
// else frame is a leaf that we don't care about
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsInlineFrame::ReflowInlineFrame(nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
InlineReflowState& irs,
|
|
nsIFrame* aFrame,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
nsLineLayout* lineLayout = aReflowState.mLineLayout;
|
|
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
|
|
PRBool pushedFrame;
|
|
nsresult rv = lineLayout->ReflowFrame(aFrame, &irs.mNextRCFrame, aStatus,
|
|
nsnull, pushedFrame);
|
|
/* This next block is for bug 28811
|
|
Test the child frame for %-awareness,
|
|
and mark this frame with a bit if it is %-aware.
|
|
Don't bother if this frame is already marked
|
|
*/
|
|
if (!(mState & NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD)) {
|
|
MarkPercentAwareFrame(aPresContext, this, aFrame);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (NS_INLINE_IS_BREAK(aStatus)) {
|
|
if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) {
|
|
if (aFrame != mFrames.FirstChild()) {
|
|
// Change break-before status into break-after since we have
|
|
// already placed at least one child frame. This preserves the
|
|
// break-type so that it can be propogated upward.
|
|
aStatus = NS_FRAME_NOT_COMPLETE |
|
|
NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
|
|
(aStatus & NS_INLINE_BREAK_TYPE_MASK);
|
|
PushFrames(aPresContext, aFrame, irs.mPrevFrame);
|
|
}
|
|
else {
|
|
// Preserve reflow status when breaking-before our first child
|
|
// and propogate it upward without modification.
|
|
// Note: if we're lazily setting the frame pointer for our child
|
|
// frames, then we need to set it now. Don't return and leave the
|
|
// remaining child frames in our child list with the wrong parent
|
|
// frame pointer...
|
|
if (irs.mSetParentPointer) {
|
|
nsIFrame* f;
|
|
aFrame->GetNextSibling(&f);
|
|
while (f) {
|
|
f->SetParent(this);
|
|
f->GetNextSibling(&f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// Break-after
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
|
|
nsIFrame* newFrame;
|
|
rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
nsIFrame* nextFrame;
|
|
aFrame->GetNextSibling(&nextFrame);
|
|
if (nsnull != nextFrame) {
|
|
aStatus |= NS_FRAME_NOT_COMPLETE;
|
|
PushFrames(aPresContext, nextFrame, aFrame);
|
|
}
|
|
else if (nsnull != mNextInFlow) {
|
|
// We must return an incomplete status if there are more child
|
|
// frames remaining in a next-in-flow that follows this frame.
|
|
nsInlineFrame* nextInFlow = (nsInlineFrame*) mNextInFlow;
|
|
while (nsnull != nextInFlow) {
|
|
if (nextInFlow->mFrames.NotEmpty()) {
|
|
aStatus |= NS_FRAME_NOT_COMPLETE;
|
|
break;
|
|
}
|
|
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
|
|
nsIFrame* newFrame;
|
|
rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (!reflowingFirstLetter) {
|
|
nsIFrame* nextFrame;
|
|
aFrame->GetNextSibling(&nextFrame);
|
|
if (nsnull != nextFrame) {
|
|
PushFrames(aPresContext, nextFrame, aFrame);
|
|
}
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsInlineFrame::PullOneFrame(nsIPresContext* aPresContext,
|
|
InlineReflowState& irs,
|
|
PRBool* aIsComplete)
|
|
{
|
|
PRBool isComplete = PR_TRUE;
|
|
|
|
nsIFrame* frame = nsnull;
|
|
nsInlineFrame* nextInFlow = irs.mNextInFlow;
|
|
while (nsnull != nextInFlow) {
|
|
frame = mFrames.PullFrame(this, irs.mPrevFrame, nextInFlow->mFrames);
|
|
if (nsnull != frame) {
|
|
isComplete = PR_FALSE;
|
|
nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, nextInFlow, this);
|
|
break;
|
|
}
|
|
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
|
|
irs.mNextInFlow = nextInFlow;
|
|
}
|
|
|
|
*aIsComplete = isComplete;
|
|
return frame;
|
|
}
|
|
|
|
void
|
|
nsInlineFrame::PushFrames(nsIPresContext* aPresContext,
|
|
nsIFrame* aFromChild,
|
|
nsIFrame* aPrevSibling)
|
|
{
|
|
NS_PRECONDITION(nsnull != aFromChild, "null pointer");
|
|
NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child");
|
|
#ifdef DEBUG
|
|
nsIFrame* prevNextSibling;
|
|
aPrevSibling->GetNextSibling(&prevNextSibling);
|
|
NS_PRECONDITION(prevNextSibling == aFromChild, "bad prev sibling");
|
|
#endif
|
|
|
|
#ifdef NOISY_PUSHING
|
|
printf("%p pushing aFromChild %p, disconnecting from prev sib %p\n",
|
|
this, aFromChild, aPrevSibling);
|
|
#endif
|
|
// Disconnect aFromChild from its previous sibling
|
|
aPrevSibling->SetNextSibling(nsnull);
|
|
|
|
// Add the frames to our overflow list (let our next in flow drain
|
|
// our overflow list when it is ready)
|
|
SetOverflowFrames(aPresContext, aFromChild);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
PRIntn
|
|
nsInlineFrame::GetSkipSides() const
|
|
{
|
|
PRIntn skip = 0;
|
|
if (nsnull != mPrevInFlow) {
|
|
nsInlineFrame* prev = (nsInlineFrame*) mPrevInFlow;
|
|
if (prev->mRect.height || prev->mRect.width) {
|
|
// Prev-in-flow is not empty therefore we don't render our left
|
|
// border edge.
|
|
skip |= 1 << NS_SIDE_LEFT;
|
|
}
|
|
else {
|
|
// If the prev-in-flow is empty, then go ahead and let our right
|
|
// edge border render.
|
|
}
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
nsInlineFrame* next = (nsInlineFrame*) mNextInFlow;
|
|
if (next->mRect.height || next->mRect.width) {
|
|
// Next-in-flow is not empty therefore we don't render our right
|
|
// border edge.
|
|
skip |= 1 << NS_SIDE_RIGHT;
|
|
}
|
|
else {
|
|
// If the next-in-flow is empty, then go ahead and let our right
|
|
// edge border render.
|
|
}
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
// nsLineFrame implementation
|
|
|
|
static void
|
|
ReParentChildListStyle(nsIPresContext* aPresContext,
|
|
nsIStyleContext* aParentStyleContext,
|
|
nsFrameList& aFrameList)
|
|
{
|
|
nsIFrame* kid = aFrameList.FirstChild();
|
|
while (nsnull != kid) {
|
|
aPresContext->ReParentStyleContext(kid, aParentStyleContext);
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsInlineFrame* it = new (aPresShell) nsFirstLineFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsFirstLineFrame::nsFirstLineFrame()
|
|
{
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsFirstLineFrame::GetFrameName(nsString& aResult) const
|
|
{
|
|
return MakeFrameName("Line", aResult);
|
|
}
|
|
#endif
|
|
|
|
NS_IMETHODIMP
|
|
nsFirstLineFrame::GetFrameType(nsIAtom** aType) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
|
|
*aType = nsLayoutAtoms::lineFrame;
|
|
NS_ADDREF(*aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsFirstLineFrame::StealFramesFrom(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* prevFrame = mFrames.GetPrevSiblingFor(aFrame);
|
|
if (prevFrame) {
|
|
prevFrame->SetNextSibling(nsnull);
|
|
}
|
|
else {
|
|
mFrames.SetFrames(nsnull);
|
|
}
|
|
}
|
|
|
|
nsIFrame*
|
|
nsFirstLineFrame::PullOneFrame(nsIPresContext* aPresContext, InlineReflowState& irs, PRBool* aIsComplete)
|
|
{
|
|
nsIFrame* frame = nsInlineFrame::PullOneFrame(aPresContext, irs, aIsComplete);
|
|
if (frame && !mPrevInFlow) {
|
|
// We are a first-line frame. Fixup the child frames
|
|
// style-context that we just pulled.
|
|
aPresContext->ReParentStyleContext(frame, mStyleContext);
|
|
}
|
|
return frame;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsFirstLineFrame::Reflow(nsIPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
if (nsnull == aReflowState.mLineLayout) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
// Check for an overflow list with our prev-in-flow
|
|
nsFirstLineFrame* prevInFlow = (nsFirstLineFrame*)mPrevInFlow;
|
|
if (nsnull != prevInFlow) {
|
|
nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE);
|
|
if (prevOverflowFrames) {
|
|
nsFrameList frames(prevOverflowFrames);
|
|
|
|
ReParentChildListStyle(aPresContext, mStyleContext, frames);
|
|
mFrames.InsertFrames(this, nsnull, prevOverflowFrames);
|
|
}
|
|
}
|
|
|
|
// It's also possible that we have an overflow list for ourselves
|
|
nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE);
|
|
if (overflowFrames) {
|
|
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
|
|
nsFrameList frames(overflowFrames);
|
|
|
|
ReParentChildListStyle(aPresContext, mStyleContext, frames);
|
|
mFrames.AppendFrames(nsnull, overflowFrames);
|
|
}
|
|
|
|
// Set our own reflow state (additional state above and beyond
|
|
// aReflowState)
|
|
InlineReflowState irs;
|
|
irs.mPrevFrame = nsnull;
|
|
irs.mNextInFlow = (nsInlineFrame*) mNextInFlow;
|
|
irs.mNextRCFrame = nsnull;
|
|
if (eReflowReason_Incremental == aReflowState.reason) {
|
|
// Peel off the next frame in the path if this is an incremental
|
|
// reflow aimed at one of the children.
|
|
nsIFrame* target;
|
|
aReflowState.reflowCommand->GetTarget(target);
|
|
if (this != target) {
|
|
aReflowState.reflowCommand->GetNext(irs.mNextRCFrame);
|
|
}
|
|
}
|
|
|
|
nsresult rv;
|
|
PRBool wasEmpty = mFrames.IsEmpty();
|
|
if (wasEmpty) {
|
|
// Try to pull over one frame before starting so that we know
|
|
// whether we have an anonymous block or not.
|
|
PRBool complete;
|
|
PullOneFrame(aPresContext, irs, &complete);
|
|
}
|
|
|
|
if (nsnull == mPrevInFlow) {
|
|
// XXX This is pretty sick, but what we do here is to pull-up, in
|
|
// advance, all of the next-in-flows children. We re-resolve their
|
|
// style while we are at at it so that when we reflow they have
|
|
// the right style.
|
|
//
|
|
// All of this is so that text-runs reflow properly.
|
|
irs.mPrevFrame = mFrames.LastChild();
|
|
for (;;) {
|
|
PRBool complete;
|
|
nsIFrame* frame = PullOneFrame(aPresContext, irs, &complete);
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
irs.mPrevFrame = frame;
|
|
}
|
|
irs.mPrevFrame = nsnull;
|
|
}
|
|
else {
|
|
// XXX do this in the Init method instead
|
|
// For continuations, we need to check and see if our style
|
|
// context is right. If its the same as the first-in-flow, then
|
|
// we need to fix it up (that way :first-line style doesn't leak
|
|
// into this continuation since we aren't the first line).
|
|
nsFirstLineFrame* first = (nsFirstLineFrame*) GetFirstInFlow();
|
|
if (mStyleContext == first->mStyleContext) {
|
|
// Fixup our style context and our children. First get the
|
|
// proper parent context.
|
|
nsIFrame* parentFrame;
|
|
first->GetParent(&parentFrame);
|
|
nsIStyleContext* parentContext;
|
|
parentFrame->GetStyleContext(&parentContext);
|
|
if (parentContext) {
|
|
// Create a new style context that is a child of the parent
|
|
// style context thus removing the :first-line style. This way
|
|
// we behave as if an anonymous (unstyled) span was the child
|
|
// of the parent frame.
|
|
nsIStyleContext* newSC;
|
|
aPresContext->ResolvePseudoStyleContextFor(mContent,
|
|
nsHTMLAtoms::mozLineFrame,
|
|
parentContext,
|
|
PR_FALSE, &newSC);
|
|
if (newSC) {
|
|
// Switch to the new style context.
|
|
SetStyleContext(aPresContext, newSC);
|
|
|
|
// Re-resolve all children
|
|
ReParentChildListStyle(aPresContext, mStyleContext, mFrames);
|
|
|
|
NS_RELEASE(newSC);
|
|
}
|
|
NS_RELEASE(parentContext);
|
|
}
|
|
}
|
|
}
|
|
|
|
rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus);
|
|
|
|
// Note: the line layout code will properly compute our
|
|
// NS_FRAME_OUTSIDE_CHILDREN state for us.
|
|
|
|
return rv;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
nsresult
|
|
NS_NewPositionedInlineFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsPositionedInlineFrame* it = new (aPresShell) nsPositionedInlineFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::Destroy(nsIPresContext* aPresContext)
|
|
{
|
|
mAbsoluteContainer.DestroyFrames(this, aPresContext);
|
|
return nsInlineFrame::Destroy(aPresContext);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::SetInitialChildList(nsIPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (nsLayoutAtoms::absoluteList == aListName) {
|
|
rv = mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
|
|
} else {
|
|
rv = nsInlineFrame::SetInitialChildList(aPresContext, aListName, aChildList);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::AppendFrames(nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (nsLayoutAtoms::absoluteList == aListName) {
|
|
rv = mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName,
|
|
aFrameList);
|
|
} else {
|
|
rv = nsInlineFrame::AppendFrames(aPresContext, aPresShell, aListName,
|
|
aFrameList);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::InsertFrames(nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (nsLayoutAtoms::absoluteList == aListName) {
|
|
rv = mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName,
|
|
aPrevFrame, aFrameList);
|
|
} else {
|
|
rv = nsInlineFrame::InsertFrames(aPresContext, aPresShell, aListName, aPrevFrame,
|
|
aFrameList);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::RemoveFrame(nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (nsLayoutAtoms::absoluteList == aListName) {
|
|
rv = mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame);
|
|
} else {
|
|
rv = nsInlineFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::GetAdditionalChildListName(PRInt32 aIndex,
|
|
nsIAtom** aListName) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
|
|
*aListName = nsnull;
|
|
if (0 == aIndex) {
|
|
*aListName = nsLayoutAtoms::absoluteList;
|
|
NS_ADDREF(*aListName);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::FirstChild(nsIPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame** aFirstChild) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
|
|
if (aListName == nsLayoutAtoms::absoluteList) {
|
|
return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild);
|
|
}
|
|
|
|
return nsInlineFrame::FirstChild(aPresContext, aListName, aFirstChild);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::GetFrameType(nsIAtom** aType) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
|
|
*aType = nsLayoutAtoms::positionedInlineFrame;
|
|
NS_ADDREF(*aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::Reflow(nsIPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// See if it's an incremental reflow command
|
|
if (eReflowReason_Incremental == aReflowState.reason) {
|
|
// Give the absolute positioning code a chance to handle it
|
|
PRBool handled;
|
|
nsRect childBounds;
|
|
nscoord containingBlockWidth = -1;
|
|
nscoord containingBlockHeight = -1;
|
|
|
|
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
|
|
containingBlockWidth, containingBlockHeight,
|
|
handled, childBounds);
|
|
|
|
// If the incremental reflow command was handled by the absolute positioning
|
|
// code, then we're all done
|
|
if (handled) {
|
|
// Just return our current size as our desired size
|
|
// XXX I don't know how to compute that without a reflow, so for the
|
|
// time being pretend a resize reflow occured
|
|
nsHTMLReflowState reflowState(aReflowState);
|
|
reflowState.reason = eReflowReason_Resize;
|
|
reflowState.reflowCommand = nsnull;
|
|
rv = nsInlineFrame::Reflow(aPresContext, aDesiredSize, reflowState, aStatus);
|
|
|
|
// XXX Although this seems like the correct thing to do the line layout
|
|
// code seems to reset the NS_FRAME_OUTSIDE_CHILDREN and so it is ignored
|
|
#if 0
|
|
// Factor the absolutely positioned child bounds into the overflow area
|
|
aDesiredSize.mOverflowArea.UnionRect(aDesiredSize.mOverflowArea, childBounds);
|
|
|
|
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
|
|
if ((aDesiredSize.mOverflowArea.x < 0) ||
|
|
(aDesiredSize.mOverflowArea.y < 0) ||
|
|
(aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) ||
|
|
(aDesiredSize.mOverflowArea.YMost() > aDesiredSize.height)) {
|
|
mState |= NS_FRAME_OUTSIDE_CHILDREN;
|
|
} else {
|
|
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
#endif
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Let the inline frame do its reflow first
|
|
rv = nsInlineFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
|
|
|
|
// Let the absolutely positioned container reflow any absolutely positioned
|
|
// child frames that need to be reflowed
|
|
if (NS_SUCCEEDED(rv)) {
|
|
nscoord containingBlockWidth = -1;
|
|
nscoord containingBlockHeight = -1;
|
|
nsRect childBounds;
|
|
|
|
rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
|
|
containingBlockWidth, containingBlockHeight,
|
|
childBounds);
|
|
|
|
// XXX Although this seems like the correct thing to do the line layout
|
|
// code seems to reset the NS_FRAME_OUTSIDE_CHILDREN and so it is ignored
|
|
#if 0
|
|
// Factor the absolutely positioned child bounds into the overflow area
|
|
aDesiredSize.mOverflowArea.UnionRect(aDesiredSize.mOverflowArea, childBounds);
|
|
|
|
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
|
|
if ((aDesiredSize.mOverflowArea.x < 0) ||
|
|
(aDesiredSize.mOverflowArea.y < 0) ||
|
|
(aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) ||
|
|
(aDesiredSize.mOverflowArea.YMost() > aDesiredSize.height)) {
|
|
mState |= NS_FRAME_OUTSIDE_CHILDREN;
|
|
} else {
|
|
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsPositionedInlineFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
|
|
{
|
|
if (!aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = sizeof(*this);
|
|
return NS_OK;
|
|
}
|
|
#endif
|