зеркало из https://github.com/mozilla/pjs.git
1016 строки
32 KiB
C++
1016 строки
32 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 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 "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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#undef NOISY_FINAL_SIZE
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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(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 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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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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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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// generate a reflow command for this frame
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nsCOMPtr<nsIReflowCommand> reflowCmd;
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NS_NewHTMLReflowCommand(getter_AddRefs(reflowCmd), this, nsIReflowCommand::ReflowDirty);
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if (reflowCmd) {
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aPresShell.AppendReflowCommand(reflowCmd);
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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::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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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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// generate a reflow command for this frame
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nsCOMPtr<nsIReflowCommand> reflowCmd;
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NS_NewHTMLReflowCommand(getter_AddRefs(reflowCmd), this, nsIReflowCommand::ReflowDirty);
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if (reflowCmd) {
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aPresShell.AppendReflowCommand(reflowCmd);
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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::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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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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// 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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// 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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// generate a reflow command for "this"
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nsCOMPtr<nsIReflowCommand> reflowCmd;
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NS_NewHTMLReflowCommand(getter_AddRefs(reflowCmd), this, nsIReflowCommand::ReflowDirty);
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if (reflowCmd) {
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aPresShell.AppendReflowCommand(reflowCmd);
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}
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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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// generate a reflow command for "this"
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nsCOMPtr<nsIReflowCommand> reflowCmd;
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NS_NewHTMLReflowCommand(getter_AddRefs(reflowCmd), this, nsIReflowCommand::ReflowDirty);
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if (reflowCmd) {
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aPresShell.AppendReflowCommand(reflowCmd);
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}
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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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if (nsnull == aReflowState.mLineLayout) {
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return NS_ERROR_INVALID_ARG;
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}
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DrainOverflow(&aPresContext);
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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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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::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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frame->FindTextRuns(aLineLayout);
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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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void
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nsInlineFrame::DrainOverflow(nsIPresContext* aPresContext)
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{
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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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for (nsIFrame* f = prevOverflowFrames; f; f->GetNextSibling(&f)) {
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nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, prevInFlow, this);
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}
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mFrames.InsertFrames(this, nsnull, prevOverflowFrames);
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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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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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mFrames.AppendFrames(nsnull, overflowFrames);
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}
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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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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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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;
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GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)font);
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aReflowState.rendContext->SetFont(font->mFont);
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nsCOMPtr<nsIFontMetrics> fm;
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aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm));
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// Compute final height of the frame.
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//
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// Do things the standard css2 way -- though it's hard to find it
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// in the css2 spec! It's actually found in the css1 spec section
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// 4.4 (you will have to read between the lines to really see
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// it).
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//
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// The height of our box is the sum of our font size plus the top
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// and bottom border and padding. The height of children do not
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// affect our height.
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fm->GetMaxAscent(aMetrics.ascent);
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fm->GetMaxDescent(aMetrics.descent);
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fm->GetHeight(aMetrics.height);
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aMetrics.ascent += aReflowState.mComputedBorderPadding.top;
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aMetrics.descent += aReflowState.mComputedBorderPadding.bottom;
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aMetrics.height += aReflowState.mComputedBorderPadding.top +
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aReflowState.mComputedBorderPadding.bottom;
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// Note: we normally use the actual font height for computing the
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// line-height raw value from the style context. On systems where
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// they disagree the actual font height is more appropriate. This
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// little hack lets us override that behavior to allow for more
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// precise layout in the face of imprecise fonts.
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if (nsHTMLReflowState::UseComputedHeight()) {
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aMetrics.height = font->mFont.size +
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aReflowState.mComputedBorderPadding.top +
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aReflowState.mComputedBorderPadding.bottom;
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}
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}
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// For now our combined area is zero. The real value will be
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// computed during vertical alignment of the line we are on.
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aMetrics.mCombinedArea.x = 0;
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aMetrics.mCombinedArea.y = 0;
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aMetrics.mCombinedArea.width = aMetrics.width;
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aMetrics.mCombinedArea.height = aMetrics.height;
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#ifdef NOISY_FINAL_SIZE
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ListTag(stdout);
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printf(": metrics=%d,%d ascent=%d descent=%d\n",
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aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent);
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#endif
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return rv;
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}
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nsresult
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nsInlineFrame::ReflowInlineFrame(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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InlineReflowState& irs,
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nsIFrame* aFrame,
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nsReflowStatus& aStatus)
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{
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nsLineLayout* lineLayout = aReflowState.mLineLayout;
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PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
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nsresult rv = lineLayout->ReflowFrame(aFrame, &irs.mNextRCFrame, aStatus);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (NS_INLINE_IS_BREAK(aStatus)) {
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if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) {
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if (aFrame != mFrames.FirstChild()) {
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// Change break-before status into break-after since we have
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// already placed at least one child frame. This preserves the
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// break-type so that it can be propogated upward.
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aStatus = NS_FRAME_NOT_COMPLETE |
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NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
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(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.
|
|
}
|
|
}
|
|
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
|
|
|
|
// 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(nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsInlineFrame* it = new nsFirstLineFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsFirstLineFrame::nsFirstLineFrame()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsFirstLineFrame::GetFrameName(nsString& aResult) const
|
|
{
|
|
return MakeFrameName("Line", aResult);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
nsFirstLineFrame::DrainOverflow(nsIPresContext* aPresContext)
|
|
{
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsFirstLineFrame::Reflow(nsIPresContext& aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
if (nsnull == aReflowState.mLineLayout) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
DrainOverflow(&aPresContext);
|
|
|
|
// 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(nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsPositionedInlineFrame* it = new 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(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(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;
|
|
nscoord containingBlockWidth = -1;
|
|
nscoord containingBlockHeight = -1;
|
|
|
|
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
|
|
containingBlockWidth, containingBlockHeight,
|
|
handled);
|
|
|
|
// 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;
|
|
return nsInlineFrame::Reflow(aPresContext, aDesiredSize, reflowState, aStatus);
|
|
}
|
|
}
|
|
|
|
// 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;
|
|
|
|
rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
|
|
containingBlockWidth, containingBlockHeight);
|
|
}
|
|
|
|
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
|