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gecko-dev/layout/generic/nsInlineFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsInlineFrame.h"
#include "nsBlockFrame.h"
#include "nsBlockReflowContext.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLParts.h"
#include "nsCOMPtr.h"
#include "nsIStyleContext.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#include "nsAbsoluteContainingBlock.h"
#include "nsLayoutAtoms.h"
// XXX TODO:
// append/insert/remove floater testing
// Theory of operation:
// XXX write this
#ifdef DEBUG
#undef NOISY_ANON_BLOCK
#undef NOISY_REFLOW_REASON
#else
#undef NOISY_ANON_BLOCK
#undef NOISY_REFLOW_REASON
#endif
nsIID nsInlineFrame::kInlineFrameCID = NS_INLINE_FRAME_CID;
//////////////////////////////////////////////////////////////////////
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::DeleteFrame(nsIPresContext& aPresContext)
{
mAbsoluteContainer.DeleteFrames(aPresContext);
return nsInlineFrame::DeleteFrame(aPresContext);
}
NS_IMETHODIMP
nsPositionedInlineFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv;
if (nsLayoutAtoms::absoluteList == aListName) {
rv = mAbsoluteContainer.SetInitialChildList(aPresContext, aListName, aChildList);
} else {
rv = nsInlineFrame::SetInitialChildList(aPresContext, aListName, aChildList);
}
return rv;
}
NS_IMETHODIMP
nsPositionedInlineFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsLayoutAtoms::absoluteList == aListName) {
// XXX Temporary code until area frame is updated...
return nsFrame::AppendFrames(aPresContext, aPresShell, aListName, aFrameList);
}
return nsInlineFrame::AppendFrames(aPresContext, aPresShell, aListName,
aFrameList);
}
NS_IMETHODIMP
nsPositionedInlineFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
if (nsLayoutAtoms::absoluteList == aListName) {
// XXX Temporary code until area frame is updated...
return nsFrame::InsertFrames(aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
return nsInlineFrame::InsertFrames(aPresContext, aPresShell, aListName, aPrevFrame,
aFrameList);
}
NS_IMETHODIMP
nsPositionedInlineFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
if (nsLayoutAtoms::absoluteList == aListName) {
// XXX Temporary code until area frame is updated...
return nsFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
}
return nsInlineFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
}
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(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;
mAbsoluteContainer.IncrementalReflow(aPresContext, aReflowState, 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)) {
rv = mAbsoluteContainer.Reflow(aPresContext, aReflowState);
}
return rv;
}
//////////////////////////////////////////////////////////////////////
// SectionData implementation
nsInlineFrame::SectionData::SectionData(nsIFrame* aFrameList)
{
firstBlock = nsnull;
prevFirstBlock = nsnull;
lastBlock = nsnull;
lastFrame = nsnull;
// Find the first and last block (if any!). When we exit the loop
// lastFrame will be the last frame in aList.
nsIFrame* frame = aFrameList;
firstFrame = aFrameList;
while (nsnull != frame) {
if (nsLineLayout::TreatFrameAsBlock(frame)) {
if (nsnull == firstBlock) {
prevFirstBlock = lastFrame;
firstBlock = frame;
lastBlock = frame;
}
else {
lastBlock = frame;
}
}
lastFrame = frame;
frame->GetNextSibling(&frame);
}
}
PRBool
nsInlineFrame::SectionData::SplitFrameList(nsFrameList& aSection1,
nsFrameList& aSection2,
nsFrameList& aSection3)
{
if (nsnull == firstBlock) {
// There are no blocks
return PR_FALSE;
}
// We have at least one block
if (nsnull != prevFirstBlock) {
// The first block is not the first frame in aList. Setup section1.
prevFirstBlock->SetNextSibling(nsnull);
aSection1.SetFrames(firstFrame);
}
aSection2.SetFrames(firstBlock);
if (lastFrame != lastBlock) {
// There are inline frames that follow the last block. Setup section3.
nsIFrame* nextSib;
lastBlock->GetNextSibling(&nextSib);
lastBlock->SetNextSibling(nsnull);
aSection3.SetFrames(nextSib);
}
return PR_TRUE;
}
////////////////////////////////////////////////////////////////////////
// Basic nsInlineFrame methods
nsresult
NS_NewInlineFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsInlineFrame* it = new nsInlineFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsInlineFrame::nsInlineFrame()
{
}
NS_IMETHODIMP
nsInlineFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kInlineFrameCID)) {
nsInlineFrame* tmp = this;
*aInstancePtr = (void*) tmp;
return NS_OK;
}
return nsInlineFrameSuper::QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsInlineFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Inline", aResult);
}
NS_IMETHODIMP
nsInlineFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::inlineFrame;
NS_ADDREF(*aType);
return NS_OK;
}
NS_IMETHODIMP
nsInlineFrame::DeleteFrame(nsIPresContext& aPresContext)
{
mFrames.DeleteFrames(aPresContext);
return nsInlineFrameSuper::DeleteFrame(aPresContext);
}
//////////////////////////////////////////////////////////////////////
// nsInlineFrame child management
// Find the first inline frame, looking backwards starting at "this",
// that contains an anonymous block. Return nsnull if an anonymous
// block is not found.
nsAnonymousBlockFrame*
nsInlineFrame::FindPrevAnonymousBlock(nsInlineFrame** aBlockParent)
{
nsInlineFrame* prevInFlow = this;
while (nsnull != prevInFlow) {
// Scan the prev-in-flows frame list, looking for an anonymous
// block frame.
nsIFrame* frame = prevInFlow->mFrames.FirstChild();
while (nsnull != frame) {
if (nsLineLayout::TreatFrameAsBlock(frame)) {
*aBlockParent = prevInFlow;
return (nsAnonymousBlockFrame*) frame;
}
frame->GetNextSibling(&frame);
}
prevInFlow = (nsInlineFrame*) prevInFlow->mPrevInFlow;
}
return nsnull;
}
// Find the first inline frame, looking forwards starting at "this",
// that contains an anonymous block. Return nsnull if an anonymous
// block is not found.
nsAnonymousBlockFrame*
nsInlineFrame::FindAnonymousBlock(nsInlineFrame** aBlockParent)
{
nsInlineFrame* nextInFlow = this;
while (nsnull != nextInFlow) {
// Scan the prev-in-flows frame list, looking for an anonymous
// block frame.
nsIFrame* frame = nextInFlow->mFrames.FirstChild();
while (nsnull != frame) {
if (nsLineLayout::TreatFrameAsBlock(frame)) {
*aBlockParent = nextInFlow;
return (nsAnonymousBlockFrame*) frame;
}
frame->GetNextSibling(&frame);
}
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
}
return nsnull;
}
nsresult
nsInlineFrame::CreateAnonymousBlock(nsIPresContext& aPresContext,
nsIFrame* aInitialFrames,
nsIFrame** aResult)
{
nsIFrame* bf;
nsresult rv = NS_NewAnonymousBlockFrame(&bf);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStyleContext> newSC;
aPresContext.ResolvePseudoStyleContextFor(mContent,
nsHTMLAtoms::mozAnonymousBlock,
mStyleContext,
PR_FALSE,
getter_AddRefs(newSC));
rv = bf->Init(aPresContext, mContent, this, newSC, nsnull);
if (NS_FAILED(rv)) {
bf->DeleteFrame(aPresContext);
delete bf;
}
else {
// Set parent for the frames now that the anonymous block has
// been created.
nsIFrame* frame = aInitialFrames;
while (nsnull != frame) {
frame->SetParent(bf);
frame->GetNextSibling(&frame);
}
rv = bf->SetInitialChildList(aPresContext, nsnull, aInitialFrames);
}
*aResult = bf;
}
return rv;
}
NS_IMETHODIMP
nsInlineFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsnull != aListName) {
return NS_ERROR_UNEXPECTED;
}
if (nsnull == aFrameList) {
return NS_OK;
}
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
rv = AppendFrames(aPresContext, *shell, aFrameList, PR_FALSE);
}
return rv;
}
NS_IMETHODIMP
nsInlineFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsnull != aListName) {
return NS_ERROR_INVALID_ARG;
}
if (nsnull == aFrameList) {
return NS_OK;
}
return AppendFrames(aPresContext, aPresShell, aFrameList, PR_TRUE);
}
nsresult
nsInlineFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aFrameList,
PRBool aGenerateReflowCommands)
{
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": append ");
nsFrame::ListTag(stdout, aFrameList);
nsIFrame* lastKid = mFrames.LastChild();
if (lastKid) {
printf(" after ");
nsFrame::ListTag(stdout, lastKid);
}
printf("\n");
#endif
nsresult rv = NS_OK;
SectionData sd(aFrameList);
if (sd.HasABlock()) {
nsFrameList section1, section2, section3;
sd.SplitFrameList(section1, section2, section3);
// There is at least one block in the new frames. See if there is
// an anonymous block frame in a prev-in-flow of this frame.
nsInlineFrame* prevInline;
nsAnonymousBlockFrame* anonymousBlock;
anonymousBlock = FindPrevAnonymousBlock(&prevInline);
if (nsnull != anonymousBlock) {
// One of the invariants of nsInlineFrame is that there will be
// at most one anonymous block frame that reflows the
// nsInlineFrame's block children (not counting any
// continuations of the anonymous block frame).
//
// We maintain that invariant by noticing when a new block frame
// enters the list of children and ensuring that all of the
// frames from the first block to the last block are contained
// by the anonymous block (or one of its continuations). This
// can cause some inline frames between here and the inline that
// contains anonymousBlock to have their children stuffed into
// the anonymous block.
// Build a list of the frames between the anonymous block and
// this frame, stealing children from our continuation frames as
// necessary.
nsIFrame* inlineSiblings;
anonymousBlock->GetNextSibling(&inlineSiblings);
nsFrameList newBlockFrames;
if (nsnull != inlineSiblings) {
newBlockFrames.AppendFrames(anonymousBlock, inlineSiblings);
}
nsInlineFrame* tmp = (nsInlineFrame*) prevInline->mNextInFlow;
while ((nsnull != tmp) && (this != tmp)) {
newBlockFrames.AppendFrames(anonymousBlock, tmp->mFrames);
tmp = (nsInlineFrame*) tmp->mNextInFlow;
}
// Now tack on all of this frame's child frames (unless this
// frame is the frame that contains the anonymous block)
if (this != prevInline) {
newBlockFrames.AppendFrames(anonymousBlock, mFrames);
}
// And then append section1 and section2 frames.
if (section1.NotEmpty()) {
newBlockFrames.AppendFrames(anonymousBlock, section1);
}
newBlockFrames.AppendFrames(anonymousBlock, section2);
// Finally, if there are any frames in section3 then they are
// appended after the anonymous block. These frames will be
// reflowed when they are pushed from the prevInline frame to a
// next-in-flow after the anonymousBlock frame is reflowed.
anonymousBlock->SetNextSibling(section3.FirstChild());
// Now we can append the frames to the anonymous block and it
// can generate a reflow command.
rv = anonymousBlock->AppendFrames2(&aPresContext, &aPresShell, nsnull,
newBlockFrames.FirstChild());
#ifdef NOISY_ANON_BLOCK
printf("AppendFrames: case 1\n");
#endif
}
else {
// There is no prior block frames that are the children of this
// inline. Therefore, section 1 is appended to our frame list
// and we wrap up the frames in section 2 with a new anonymous
// block and the frames in section 3 get appended to the frame
// list after the anonymous frame (so that they can be pushed to
// a next-in-flow after this finishes reflowing its anonymous
// block).
nsIFrame* anonBlock;
rv = CreateAnonymousBlock(aPresContext, section2.FirstChild(),
&anonBlock);
if (NS_FAILED(rv)) {
return rv;
}
if (section1.NotEmpty()) {
mFrames.AppendFrames(nsnull, section1);
}
mFrames.AppendFrame(nsnull, anonBlock);
if (section3.NotEmpty()) {
mFrames.AppendFrames(nsnull, section3);
}
#ifdef NOISY_ANON_BLOCK
printf("AppendFrames: case 2\n");
#endif
if (aGenerateReflowCommands) {
// generate a reflow command for "this"
nsIReflowCommand* reflowCmd = nsnull;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
}
}
else {
// The new frames contain no block frames
mFrames.AppendFrames(this, aFrameList);
#ifdef NOISY_ANON_BLOCK
printf("AppendFrames: case 3\n");
#endif
if (aGenerateReflowCommands) {
// generate a reflow command for "this"
nsIReflowCommand* reflowCmd = nsnull;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
}
return rv;
}
NS_IMETHODIMP
nsInlineFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
if (nsnull != aListName) {
return NS_ERROR_INVALID_ARG;
}
if (nsnull == aFrameList) {
return NS_OK;
}
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": insert ");
nsFrame::ListTag(stdout, aFrameList);
if (aPrevFrame) {
printf(" after ");
nsFrame::ListTag(stdout, aPrevFrame);
}
printf("\n");
#endif
nsresult rv = NS_OK;
SectionData sd(aFrameList);
if (sd.HasABlock()) {
// Break insertion up into 3 pieces
nsFrameList section1, section2, section3;
sd.SplitFrameList(section1, section2, section3);
nsIFrame* prevFrame = aPrevFrame;
// First insert the inlines in section1 after prevFrame
if (section1.NotEmpty()) {
nsIFrame* newPrevFrame = section1.LastChild();
rv = InsertInlineFrames(aPresContext, aPresShell, prevFrame,
section1.FirstChild());
prevFrame = newPrevFrame;
}
// Next insert the frames in section2 after prevFrame
if (NS_SUCCEEDED(rv)) {
nsIFrame* newPrevFrame = section2.LastChild();
rv = InsertBlockFrames(aPresContext, aPresShell, prevFrame,
section2.FirstChild());
prevFrame = newPrevFrame;
}
// Finally, insert the frames in section3 after prevFrame
if (NS_SUCCEEDED(rv) && section3.NotEmpty()) {
rv = InsertInlineFrames(aPresContext, aPresShell, prevFrame,
section3.FirstChild());
}
}
else {
// Use simpler path when the insertion is only inline frames
rv = InsertInlineFrames(aPresContext, aPresShell, aPrevFrame, aFrameList);
}
return rv;
}
nsresult
nsInlineFrame::InsertBlockFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
nsresult rv = NS_OK;
PRBool generateReflowCommand = PR_FALSE;
nsIFrame* target = nsnull;
if (nsnull == aPrevFrame) {
// The block is being inserted at the head of all the child
// frames.
nsInlineFrame* flow;
nsAnonymousBlockFrame* anonymousBlock = FindAnonymousBlock(&flow);
if (nsnull == anonymousBlock) {
// There are no anonymous blocks so create one and place the
// frames into it.
nsIFrame* anonBlock;
rv = CreateAnonymousBlock(aPresContext, aFrameList, &anonBlock);
if (NS_FAILED(rv)) {
return rv;
}
mFrames.InsertFrames(this, nsnull, anonBlock);
target = this;
generateReflowCommand = PR_TRUE;
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 1\n");
#endif
}
else {
// Take all of the frames before the anonymous block, plus the
// frames in aFrameList and insert them into the anonymous
// block.
nsFrameList frames;
frames.AppendFrames(anonymousBlock, aFrameList);
nsInlineFrame* start = this;
while (start != flow) {
frames.AppendFrames(anonymousBlock, start->mFrames);
start->GetNextInFlow((nsIFrame**) &start);
}
anonymousBlock->InsertFrames2(&aPresContext, &aPresShell, nsnull,
nsnull, frames.FirstChild());
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 2\n");
#endif
}
}
else {
// First see if the insertion is inside the anonymous block
nsIFrame* prevFrameParent;
aPrevFrame->GetParent(&prevFrameParent);
if (nsLineLayout::TreatFrameAsBlock(prevFrameParent)) {
// The previous frame's parent is an anonymous block. This means
// that the new block frames can be safely inserted there.
nsIFrame* frame = aFrameList;
while (nsnull != frame) {
frame->SetParent(prevFrameParent);
frame->GetNextSibling(&frame);
}
nsAnonymousBlockFrame* anonymousBlock;
anonymousBlock = (nsAnonymousBlockFrame*) prevFrameParent;
anonymousBlock->InsertFrames2(&aPresContext, &aPresShell, nsnull,
aPrevFrame, aFrameList);
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 3\n");
#endif
}
else {
// The previous frame's parent is an inline frame. First see if
// there is an anonymous block before the insertion point.
nsInlineFrame* flow = (nsInlineFrame*) prevFrameParent;
nsAnonymousBlockFrame* anonymousBlock;
anonymousBlock = flow->FindPrevAnonymousBlock(&flow);
if (nsnull != anonymousBlock) {
// We found an anonymous block before the insertion
// point. Take all of the inline frames between the anonymous
// block and prevFrameParent and strip them away from the
// inline frames that contain them.
nsFrameList frames;
nsInlineFrame* start;
flow->GetNextInFlow((nsIFrame**) &start); // start after anon block
while (start != prevFrameParent) {
frames.AppendFrames(anonymousBlock, start->mFrames);
start->GetNextInFlow((nsIFrame**) &start);
}
// Now append the frames just before and including aPrevFrame
// to "frames".
flow = (nsInlineFrame*) prevFrameParent;
nsIFrame* remainingFrames;
flow->mFrames.Split(aPrevFrame, &remainingFrames);
frames.AppendFrames(anonymousBlock, flow->mFrames);
flow->mFrames.SetFrames(remainingFrames);
generateReflowCommand = PR_TRUE;
target = flow;
// Finally, append the block frames to "frames" and then
// append the list of frames to the anonymous block.
frames.AppendFrames(anonymousBlock, aFrameList);
anonymousBlock->AppendFrames2(&aPresContext, &aPresShell, nsnull,
frames.FirstChild());
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 4\n");
#endif
}
else {
// There is no anymous block before the insertion point. See
// if there is one after the insertion point.
flow = (nsInlineFrame*) prevFrameParent;
anonymousBlock = flow->FindAnonymousBlock(&flow);
if (nsnull != anonymousBlock) {
// We found an anonymous block after the insertion
// point. Seed the list of frames to put into the anonymous
// block with the block frames being inserted.
nsFrameList frames;
frames.AppendFrames(anonymousBlock, aFrameList);
nsInlineFrame* start = (nsInlineFrame*) prevFrameParent;
// Take the frames after aPrevFrame and place them at the
// end of the frames list.
nsIFrame* remainingFrames;
start->mFrames.Split(aPrevFrame, &remainingFrames);
if (remainingFrames) {
frames.AppendFrames(anonymousBlock, remainingFrames);
}
generateReflowCommand = PR_TRUE;
target = start;
// Gather up all of the inline frames from all of the flow
// between the insertion point and the anonymous block.
start->GetNextInFlow((nsIFrame**) &start);
while (start != flow) {
frames.AppendFrames(anonymousBlock, start->mFrames);
start->GetNextInFlow((nsIFrame**) &start);
}
// Now update the anonymous block
anonymousBlock->InsertFrames2(&aPresContext, &aPresShell, nsnull,
nsnull, frames.FirstChild());
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 5\n");
#endif
}
else {
// There are no anonymous blocks so create one and place the
// frames into it.
nsIFrame* anonBlock;
rv = CreateAnonymousBlock(aPresContext, aFrameList, &anonBlock);
if (NS_FAILED(rv)) {
return rv;
}
// Insert the frame into the correct parent (it will not be
// this frame when aPrevFrame's parent != this)
flow = (nsInlineFrame*) prevFrameParent;
flow->mFrames.InsertFrames(flow, aPrevFrame, anonBlock);
generateReflowCommand = PR_TRUE;
target = flow;
#ifdef NOISY_ANON_BLOCK
printf("InsertBlockFrames: case 6\n");
#endif
}
}
}
}
if (generateReflowCommand) {
// generate a reflow command for "this"
nsIReflowCommand* reflowCmd = nsnull;
rv = NS_NewHTMLReflowCommand(&reflowCmd, target,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
nsresult
nsInlineFrame::InsertInlineFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
nsresult rv = NS_OK;
PRBool generateReflowCommand = PR_FALSE;
nsIFrame* target = nsnull;
if (nsnull == aPrevFrame) {
// Insert the frames at the front of our list. Since the frames
// are all inline frames we just place them there, even if our
// current first frame is the anonymous block frame. The reflow
// logic will properly push the anonymous block frame to a
// next-in-flow.
mFrames.InsertFrames(this, nsnull, aFrameList);
generateReflowCommand = PR_TRUE;
target = this;
#ifdef NOISY_ANON_BLOCK
printf("InsertInlineFrames: case 1\n");
#endif
}
else {
nsIFrame* prevFrameParent;
aPrevFrame->GetParent(&prevFrameParent);
if (nsLineLayout::TreatFrameAsBlock(prevFrameParent)) {
nsAnonymousBlockFrame* anonymousBlock;
anonymousBlock = (nsAnonymousBlockFrame*) prevFrameParent;
// The previous frame's parent is an anonymous block (otherwise
// its parent would be this frame). We must not place the inline
// frames into the anonymous block if they should be in
// section3.
nsIFrame* nextSibling;
aPrevFrame->GetNextSibling(&nextSibling);
nsIFrame* anonymousBlockNextInFlow;
prevFrameParent->GetNextInFlow(&anonymousBlockNextInFlow);
if ((nsnull != nextSibling) || (nsnull != anonymousBlockNextInFlow)) {
// Easy case: there are more frames following aPrevFrame which
// means that this insertion lies in the anonymous block.
nsIFrame* frame = aFrameList;
while (nsnull != frame) {
frame->SetParent(anonymousBlock);
frame->GetNextSibling(&frame);
}
anonymousBlock->InsertFrames2(&aPresContext, &aPresShell, nsnull,
aPrevFrame, aFrameList);
#ifdef NOISY_ANON_BLOCK
printf("InsertInlineFrames: case 2\n");
#endif
}
else {
// aPrevFrame is the last frame that should be in the
// anonymous block.
nsInlineFrame* anonymousBlockParent;
anonymousBlock->GetParent((nsIFrame**)&anonymousBlockParent);
// Place the inline frames after the anonymous block
nsIFrame* frame = aFrameList;
while (nsnull != frame) {
frame->SetParent(anonymousBlockParent);
frame->GetNextSibling(&frame);
}
anonymousBlockParent->mFrames.InsertFrames(nsnull, anonymousBlock,
aFrameList);
generateReflowCommand = PR_TRUE;
target = anonymousBlockParent;
#ifdef NOISY_ANON_BLOCK
printf("InsertInlineFrames: case 3\n");
#endif
}
}
else {
// The previous frame's parent is an inline frame. Therefore
// this is either a section1 or section3 insertion. Insert the
// frames in the proper flow block (which will be aPrevFrame's
// parent which is currently stored in anonymousBlock)
nsInlineFrame* flow = (nsInlineFrame*) prevFrameParent;
flow->mFrames.InsertFrames(flow, aPrevFrame, aFrameList);
generateReflowCommand = PR_TRUE;
target = flow;
#ifdef NOISY_ANON_BLOCK
printf("InsertInlineFrames: case 4\n");
#endif
}
}
if (generateReflowCommand) {
// generate a reflow command for "this"
nsIReflowCommand* reflowCmd = nsnull;
rv = NS_NewHTMLReflowCommand(&reflowCmd, target,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
NS_IMETHODIMP
nsInlineFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
if (nsnull != aListName) {
return NS_ERROR_INVALID_ARG;
}
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": remove ");
nsFrame::ListTag(stdout, aOldFrame);
printf("\n");
#endif
nsresult rv = NS_OK;
PRBool generateReflowCommand = PR_FALSE;
nsIFrame* target = nsnull;
nsIFrame* oldFrameParent;
if (ParentIsInlineFrame(aOldFrame, &oldFrameParent)) {
// Loop and destroy the frame and all of its
// continuations. Because the frame's parent is an inline frame we
// know that any continuations will also be in an inline frame
// parent.
nsInlineFrame* parent = (nsInlineFrame*) oldFrameParent;
while (nsnull != aOldFrame) {
// If the frame being removed has zero size then don't bother
// generating a reflow command.
nsRect bbox;
aOldFrame->GetRect(bbox);
if ((0 == bbox.width) && (0 == bbox.height)) {
// Don't bother generating a reflow command
}
else {
generateReflowCommand = PR_TRUE;
target = this;
}
// When the parent is an inline frame we have a simple task -
// just remove the frame from its parents list and generate a
// reflow command.
nsIFrame* oldFrameNextInFlow;
aOldFrame->GetNextInFlow(&oldFrameNextInFlow);
nsSplittableType st;
aOldFrame->IsSplittable(st);
if (NS_FRAME_NOT_SPLITTABLE != st) {
aOldFrame->RemoveFromFlow();
}
parent->mFrames.DeleteFrame(aPresContext, aOldFrame);
aOldFrame = oldFrameNextInFlow;
if (nsnull != aOldFrame) {
aOldFrame->GetParent((nsIFrame**) &parent);
}
}
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 1\n");
#endif
}
else {
#ifdef DEBUG
nsIFrame* oldFrameNextInFlow;
aOldFrame->GetNextInFlow(&oldFrameNextInFlow);
NS_ASSERTION(nsnull == oldFrameNextInFlow, "XXX: can't remove continued frames that are in anonymous blocks -- not yet implemented");
#endif
nsIFrame* nextInFlow;
nsIFrame* prevInFlow;
// The parent is not an inline frame which means it is an
// anonymous block frame.
nsAnonymousBlockFrame* anonymousBlock =
(nsAnonymousBlockFrame*) oldFrameParent;
// It is possible that we are about to remove the last child of
// the anonymous block. In this case we remove the anonymous block.
nsIFrame* kids;
anonymousBlock->FirstChild(nsnull, &kids);
nsFrameList blockKids(kids);
if (1 == blockKids.GetLength()) {
// Remove the anonymous block
mFrames.DeleteFrame(aPresContext, anonymousBlock);
generateReflowCommand = PR_TRUE;
target = this;
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 2\n");
#endif
}
else {
// If the frame being removed is a block frame then we may need to
// do something fancy.
if (nsLineLayout::TreatFrameAsBlock(aOldFrame)) {
// It is possible that we are removing the first block in the
// anonymous block or the last block. See if its so.
anonymousBlock->GetPrevInFlow(&prevInFlow);
nsIFrame* prevSib;
if ((nsnull != prevInFlow) ||
(nsnull != (prevSib = blockKids.GetPrevSiblingFor(aOldFrame)))) {
// There is a block in the anonymous block prior to the
// block that we are removing. See if we are removing the
// last block in the anonymous block.
anonymousBlock->GetNextInFlow(&nextInFlow);
nsIFrame* nextSib;
aOldFrame->GetNextSibling(&nextSib);
if ((nsnull != nextInFlow) || (nsnull != nextSib)) {
// There is a block in the anonymous block after the block
// that we are removing. This means that we can let the
// anonymous block remove the frame.
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 3\n");
#endif
anonymousBlock->RemoveFrame2(&aPresContext, &aPresShell, aListName,
aOldFrame);
}
else {
// We are removing the last block. We must steal all of
// the inline frames that preceed the block being removed
// (up to the closest prior block) so that they can be
// moved outside the anonymous block and into an inline
// frame.
// First get the last frame out of the picture; delete any
// continuations it might have.
nsInlineFrame* anonymousBlockParent;
anonymousBlock->GetParent((nsIFrame**) &anonymousBlockParent);
nsAnonymousBlockFrame* ab = anonymousBlock;
anonymousBlock->RemoveFramesFrom(aOldFrame);
aOldFrame->DeleteFrame(aPresContext);
while (nsnull != nextInFlow) {
nsIFrame* nextParent;
nextInFlow->GetParent(&nextParent);
if (nextParent != ab) {
ab = (nsAnonymousBlockFrame*) nextParent;
}
ab->RemoveFirstFrame();
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(&nextNextInFlow);
nextInFlow->DeleteFrame(aPresContext);
nextInFlow = nextNextInFlow;
}
// Any inline frames that are between the new last-block
// inside the anonymous block and the block we just
// removed need to be taken out of the anonymous block.
nsFrameList inlines;
while (nsnull != anonymousBlock) {
// Find the first inline before the last block
nsIFrame* abkids;
anonymousBlock->FirstChild(nsnull, &abkids);
if (nsnull != abkids) {
SectionData sd(abkids);
if (sd.HasABlock()) {
abkids = sd.lastBlock;
abkids->GetNextSibling(&abkids);
if (nsnull != abkids) {
// Take the frames that follow the last block
// (which are inline frames) and remove them from
// the anonymous block. Insert them into the
// inlines frame-list.
anonymousBlock->RemoveFramesFrom(abkids);
inlines.InsertFrames(nsnull, nsnull, abkids);
}
}
else {
// All of the frames are inline frames -- take them
// all away.
anonymousBlock->RemoveFramesFrom(abkids);
inlines.InsertFrames(nsnull, nsnull, abkids);
}
}
anonymousBlock->GetPrevInFlow((nsIFrame**) &anonymousBlock);
}
// Now we have all of the inline frames that need to be
// placed into an inline parent instead of the anonymous
// block parent.
if (inlines.NotEmpty()) {
// Place the inline frames after the anonymous block
// frame in the child list of the anonymousBlockParent.
anonymousBlockParent->mFrames.AppendFrames(anonymousBlockParent,
inlines);
}
generateReflowCommand = PR_TRUE;
target = anonymousBlockParent;
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 4\n");
#endif
}
}
else {
// We are removing the first block child of the anonymous
// block. We must gather all of the inline frames that
// follow the block being removed from the anonymous block
// so that they can be moved outside the anonymous block and
// into an inline frame.
// Take away the first frame from the anonymous block (which
// is the frame we are trying to remove). Make sure we
// remove aOldFrame's continuations if it has any...
nsInlineFrame* anonymousBlockParent;
anonymousBlock->GetParent((nsIFrame**) &anonymousBlockParent);
anonymousBlock->RemoveFirstFrame();
aOldFrame->GetNextInFlow(&nextInFlow);
aOldFrame->DeleteFrame(aPresContext);
while (nsnull != nextInFlow) {
nsIFrame* nextParent;
nextInFlow->GetParent(&nextParent);
if (nextParent != anonymousBlock) {
anonymousBlock = (nsAnonymousBlockFrame*) nextParent;
}
anonymousBlock->RemoveFirstFrame();
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(&nextNextInFlow);
nextInFlow->DeleteFrame(aPresContext);
nextInFlow = nextNextInFlow;
}
// Gather up the inline frames that follow aOldFrame
nsFrameList frames;
PRBool done = PR_FALSE;
while (!done && (nsnull != anonymousBlock)) {
nsIFrame* kid;
anonymousBlock->FirstChild(nsnull, &kid);
while (nsnull != kid) {
if (nsLineLayout::TreatFrameAsBlock(kid)) {
done = PR_TRUE;
break;
}
nsIFrame* next;
kid->GetNextSibling(&next);
anonymousBlock->RemoveFirstFrame();
frames.AppendFrame(nsnull, kid);
kid = next;
}
anonymousBlock->GetNextInFlow((nsIFrame**) &anonymousBlock);
}
if (frames.NotEmpty()) {
// If the anonymousBlockParent has a prev-in-flow then
// append the inline frames there, otherwise insert them
// before the anonymousBlock.
anonymousBlockParent->GetPrevInFlow(&prevInFlow);
if (nsnull != prevInFlow) {
anonymousBlockParent = (nsInlineFrame*) prevInFlow;
anonymousBlockParent->mFrames.AppendFrames(anonymousBlockParent,
frames);
}
else {
anonymousBlockParent->mFrames.InsertFrames(anonymousBlockParent,
nsnull,
frames);
}
}
generateReflowCommand = PR_TRUE;
target = anonymousBlockParent;
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 5\n");
#endif
}
}
else {
// We can let the anonymousBlock remove the frame directly
#ifdef NOISY_ANON_BLOCK
printf("RemoveFrame: case 6\n");
#endif
anonymousBlock->RemoveFrame2(&aPresContext, &aPresShell, aListName,
aOldFrame);
}
}
}
if (generateReflowCommand) {
// generate a reflow command for "this"
nsIReflowCommand* reflowCmd = nsnull;
rv = NS_NewHTMLReflowCommand(&reflowCmd, target,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Reflow methods
NS_IMETHODIMP
nsInlineFrame::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;
if (mFrames.IsEmpty()) {
// Try to pull over one frame before starting so that we know
// whether we have an anonymous block or not.
(void) PullAnyFrame(&aPresContext, irs);
}
if (HaveAnonymousBlock()) {
if (!aReflowState.mLineLayout->LineIsEmpty()) {
// This inline frame cannot be placed on the current line
// because there already is an inline frame on this line (and we
// contain an anonymous block).
aStatus = NS_INLINE_LINE_BREAK_BEFORE();
rv = NS_OK;
}
else {
rv = ReflowBlockFrame(&aPresContext, aReflowState, irs,
aMetrics, aStatus);
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear
// it.
if ((aMetrics.mCombinedArea.x < 0) ||
(aMetrics.mCombinedArea.y < 0) ||
(aMetrics.mCombinedArea.XMost() > aMetrics.width) ||
(aMetrics.mCombinedArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
}
else {
rv = ReflowInlineFrames(&aPresContext, aReflowState, irs,
aMetrics, aStatus);
// Note: when we are reflowing inline frames the line layout code
// will properly compute our NS_FRAME_OUTSIDE_CHILDREN state for
// us.
}
return rv;
}
NS_IMETHODIMP
nsInlineFrame::FindTextRuns(nsLineLayout& aLineLayout)
{
if (HaveAnonymousBlock()) {
aLineLayout.EndTextRun();
}
else {
nsIFrame* frame = mFrames.FirstChild();
while (nsnull != frame) {
nsIHTMLReflow* ihr;
nsresult rv = frame->QueryInterface(kIHTMLReflowIID, (void**)&ihr);
if (NS_SUCCEEDED(rv)) {
ihr->FindTextRuns(aLineLayout);
}
frame->GetNextSibling(&frame);
}
}
return NS_OK;
}
void
nsInlineFrame::DrainOverflow(nsIPresContext* aPresContext)
{
// Check for an overflow list with our prev-in-flow
nsInlineFrame* prevInFlow = (nsInlineFrame*)mPrevInFlow;
if (nsnull != prevInFlow) {
if (prevInFlow->mOverflowFrames.NotEmpty()) {
// When pushing and pulling frames we need to check for whether any
// views need to be reparented.
// XXX Doing it this way means an extra pass over the frames. We could
// change InsertFrames() to do this, but that's a general purpose
// function and it doesn't seem like this functionality belongs there...
for (nsIFrame* f = prevInFlow->mOverflowFrames.FirstChild(); f; f->GetNextSibling(&f)) {
nsHTMLContainerFrame::ReparentFrameView(f, prevInFlow, this);
}
mFrames.InsertFrames(this, nsnull, prevInFlow->mOverflowFrames);
}
}
// It's also possible that we have an overflow list for ourselves
if (mOverflowFrames.NotEmpty()) {
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
mFrames.AppendFrames(nsnull, mOverflowFrames);
}
}
nsresult
nsInlineFrame::ReflowInlineFrames(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& irs,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
aStatus = NS_FRAME_COMPLETE;
nsLineLayout* lineLayout = aReflowState.mLineLayout;
nscoord leftEdge = 0;
if (nsnull == mPrevInFlow) {
leftEdge = aReflowState.mComputedBorderPadding.left;
}
nscoord availableWidth = aReflowState.availableWidth;
if (NS_UNCONSTRAINEDSIZE != availableWidth) {
// Subtract off left and right border+padding from availableWidth
availableWidth -= leftEdge;
availableWidth -= aReflowState.mComputedBorderPadding.right;
}
lineLayout->BeginSpan(this, &aReflowState,
leftEdge, leftEdge + availableWidth);
// First reflow our current children
nsIFrame* frame = mFrames.FirstChild();
PRBool done = PR_FALSE;
while (nsnull != frame) {
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
if (NS_FAILED(rv)) {
done = PR_TRUE;
break;
}
if (NS_FRAME_COMPLETE != aStatus) {
if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) {
done = PR_TRUE;
break;
}
}
irs.mPrevFrame = frame;
frame->GetNextSibling(&frame);
}
// Attempt to pull frames from our next-in-flow until we can't
if (!done && (nsnull != mNextInFlow)) {
while (!done) {
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
PRBool isComplete;
frame = PullInlineFrame(aPresContext, irs, &isComplete);
if (nsnull == frame) {
if (!isComplete) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
break;
}
rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
if (NS_FAILED(rv)) {
done = PR_TRUE;
break;
}
if (NS_FRAME_COMPLETE != aStatus) {
if (!reflowingFirstLetter || NS_INLINE_IS_BREAK(aStatus)) {
done = PR_TRUE;
break;
}
}
irs.mPrevFrame = frame;
}
}
#ifdef DEBUG
if (NS_FRAME_COMPLETE == aStatus) {
// We can't be complete AND have overflow frames!
NS_ASSERTION(mOverflowFrames.IsEmpty(), "whoops");
}
#endif
// If after reflowing our children they take up no area then make
// sure that we don't either.
//
// Note: CSS demands that empty inline elements still affect the
// line-height calculations. However, continuations of an inline
// that are empty we force to empty so that things like collapsed
// whitespace in an inline element don't affect the line-height.
nsSize size;
lineLayout->EndSpan(this, size, aMetrics.maxElementSize);
if ((0 == size.height) && (0 == size.width) &&
((nsnull != mPrevInFlow) || (nsnull != mNextInFlow))) {
// This is a continuation of a previous inline. Therefore make
// sure we don't affect the line-height.
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = 0;
aMetrics.maxElementSize->height = 0;
}
}
else {
// Compute final width
aMetrics.width = size.width;
if (nsnull == mPrevInFlow) {
aMetrics.width += aReflowState.mComputedBorderPadding.left;
}
if (NS_FRAME_IS_COMPLETE(aStatus)) {
aMetrics.width += aReflowState.mComputedBorderPadding.right;
}
const nsStyleFont* font;
GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)font);
aReflowState.rendContext->SetFont(font->mFont);
nsIFontMetrics* fm;
aReflowState.rendContext->GetFontMetrics(fm);
// Compute final height. 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 use the actual font height for sizing our selves
// instead of the computed font height. 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.
static PRBool useComputedHeight = PR_FALSE;
#if defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS)
static PRBool firstTime = 1;
if (firstTime) {
if (getenv("GECKO_USE_COMPUTED_HEIGHT")) {
useComputedHeight = PR_TRUE;
}
}
#endif
if (useComputedHeight) {
// Special debug code that violates the above CSS2 spec
// clarification. Why? So that we can predictably compute the
// values for testing layout.
nscoord computedHeight = aReflowState.mComputedBorderPadding.top +
aReflowState.mComputedBorderPadding.bottom +
font->mFont.size;
if (computedHeight != aMetrics.height) {
#ifdef DEBUG
if (0 == (mState & 0x80000000)) {
nsFrame::ListTag(stdout, this);
printf(": using computedHeight %d instead of actual height %d\n",
computedHeight, aMetrics.height);
mState |= 0x80000000;
}
#endif
aMetrics.height = computedHeight;
}
}
NS_RELEASE(fm);
}
// For now our combined area is zero. The real value will be
// computed during vertical alignment of the line we are on.
aMetrics.mCombinedArea.x = 0;
aMetrics.mCombinedArea.y = 0;
aMetrics.mCombinedArea.width = aMetrics.width;
aMetrics.mCombinedArea.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);
#endif
return rv;
}
nsresult
nsInlineFrame::ReflowInlineFrame(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& irs,
nsIFrame* aFrame,
nsReflowStatus& aStatus)
{
// Make sure that we don't reflow a block frame when we run across
// one. This can easily happen if this inline has a mixture of
// frames (note that an anonymous block frame is used to wrap up the
// direct block children of this inline therefore when we do run
// across a block frame its an anonymous block).
if (nsLineLayout::TreatFrameAsBlock(aFrame)) {
NS_ASSERTION(aFrame != mFrames.FirstChild(), "bad anon-block status");
PushFrames(aPresContext, aFrame, irs.mPrevFrame);
aStatus = NS_INLINE_LINE_BREAK_AFTER(NS_FRAME_NOT_COMPLETE);
return NS_OK;
}
nsLineLayout* lineLayout = aReflowState.mLineLayout;
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
nsresult rv = lineLayout->ReflowFrame(aFrame, &irs.mNextRCFrame, aStatus);
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.
}
}
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::PullInlineFrame(nsIPresContext* aPresContext,
InlineReflowState& irs,
PRBool* aIsComplete)
{
PRBool isComplete = PR_TRUE;
nsIFrame* frame = nsnull;
nsInlineFrame* nextInFlow = irs.mNextInFlow;
while (nsnull != nextInFlow) {
if (nextInFlow->HaveAnonymousBlock()) {
isComplete = PR_FALSE;
break;
}
frame = mFrames.PullFrame(this, irs.mPrevFrame, nextInFlow->mFrames);
if (nsnull != frame) {
isComplete = PR_FALSE;
nsHTMLContainerFrame::ReparentFrameView(frame, nextInFlow, this);
break;
}
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
irs.mNextInFlow = nextInFlow;
}
*aIsComplete = isComplete;
return frame;
}
nsIFrame*
nsInlineFrame::PullAnyFrame(nsIPresContext* aPresContext,
InlineReflowState& irs)
{
nsIFrame* frame = nsnull;
nsInlineFrame* nextInFlow = irs.mNextInFlow;
while (nsnull != nextInFlow) {
frame = mFrames.PullFrame(this, irs.mPrevFrame, nextInFlow->mFrames);
if (nsnull != frame) {
nsHTMLContainerFrame::ReparentFrameView(frame, nextInFlow, this);
break;
}
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
irs.mNextInFlow = nextInFlow;
}
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)
NS_ASSERTION(mOverflowFrames.IsEmpty(), "bad overflow list");
mOverflowFrames.SetFrames(aFromChild);
}
nsresult
nsInlineFrame::ReflowBlockFrame(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& irs,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus)
{
nsIFrame* blockFrame = mFrames.FirstChild();
// Compute available area
#if XXX_what_to_do
nscoord x = aReflowState.mComputedBorderPadding.left;
nscoord availableWidth = aReflowState.availableWidth;
if (NS_UNCONSTRAINEDSIZE != availableWidth) {
if (nsnull != mPrevInFlow) {
x = 0;
availableWidth -= aReflowState.mComputedBorderPadding.right;
}
else {
availableWidth -= aReflowState.mComputedBorderPadding.left +
aReflowState.mComputedBorderPadding.right;
}
}
nscoord y = aReflowState.mComputedBorderPadding.top;
nscoord availableHeight = aReflowState.availableHeight;
if (NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight) {
availableHeight -= aReflowState.mComputedBorderPadding.top +
aReflowState.mComputedBorderPadding.right;
}
#else
nscoord x = 0;
nscoord availableWidth = aReflowState.availableWidth;
nscoord y = 0;
nscoord availableHeight = aReflowState.availableHeight;
#endif
// XXX_ib write me...
//XXX nscoord collapsedTopMargin = 0;
nscoord collapsedBottomMargin = 0;
// Reflow the block frame
nsBlockReflowContext bc(aPresContext, aReflowState,
nsnull != aMetrics.maxElementSize);
bc.SetNextRCFrame(irs.mNextRCFrame);
nsRect availSpace(x, y, availableWidth, availableHeight);
PRBool isAdjacentWithTop = PR_FALSE;
nsMargin computedOffsets;
nsresult rv = bc.ReflowBlock(blockFrame, availSpace, PR_FALSE, 0,
isAdjacentWithTop,
computedOffsets, aStatus);
if (NS_FAILED(rv)) {
return rv;
}
if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) {
// We need to break before placing the block so propogate that
// status outward to our parent.
}
else {
// Place the block (during placement we might discover that none
// of it fits)
nsRect bounds;
PRBool anyFit = bc.PlaceBlock(isAdjacentWithTop,
computedOffsets, &collapsedBottomMargin,
bounds, aMetrics.mCombinedArea);
if (!anyFit) {
// None of the block fit
aStatus = NS_INLINE_LINE_BREAK_BEFORE();
}
else {
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
// When the block isn't complete create a continuation for it
nsIFrame* newFrame;
rv = CreateNextInFlow(*aPresContext, this, blockFrame, newFrame);
if (NS_FAILED(rv)) {
return rv;
}
}
// It's possible that the block frame is followed by one or more
// inline frames. Make sure we reflect that in our reflow status
// and push them to our next-in-flow.
nsIFrame* nextFrame;
blockFrame->GetNextSibling(&nextFrame);
if (nsnull != nextFrame) {
PushFrames(aPresContext, nextFrame, blockFrame);
aStatus |= NS_FRAME_NOT_COMPLETE;
}
else if (NS_FRAME_IS_COMPLETE(aStatus)) {
// When the block we reflowed is complete then we need to
// check and see if there are other frames (inline frames)
// following in our continuations so that we return the proper
// reflow status.
nsInlineFrame* nextInFlow = (nsInlineFrame*) mNextInFlow;
while (nsnull != nextInFlow) {
if (nextInFlow->mFrames.NotEmpty() ||
nextInFlow->mOverflowFrames.NotEmpty()) {
aStatus |= NS_FRAME_NOT_COMPLETE;
break;
}
nextInFlow = (nsInlineFrame*) nextInFlow->mNextInFlow;
}
}
// What we do here is to fudge the size. <b>This</b> frame will
// be 0,0 but will contain a single child (the anonymous block)
// that is properly sized.
aMetrics.width = bounds.width;
aMetrics.height = bounds.height;
aMetrics.ascent = bounds.height;
aMetrics.descent = 0;
aMetrics.mCarriedOutBottomMargin = bc.GetCarriedOutBottomMargin();
if (nsnull != aMetrics.maxElementSize) {
*aMetrics.maxElementSize = bc.GetMaxElementSize();
}
}
}
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
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
ReResolveChildList(nsIPresContext* aPresContext,
nsIStyleContext* aParentStyleContext,
nsFrameList& aFrameList)
{
nsIFrame* kid = aFrameList.FirstChild();
while (nsnull != kid) {
kid->ReResolveStyleContext(aPresContext, aParentStyleContext,
NS_STYLE_HINT_REFLOW,
nsnull, nsnull);
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;
}
NS_IMETHODIMP
nsFirstLineFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
return mParent->AppendFrames(aPresContext, aPresShell, aListName,
aFrameList);
}
NS_IMETHODIMP
nsFirstLineFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
return mParent->InsertFrames(aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
NS_IMETHODIMP
nsFirstLineFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
return mParent->RemoveFrame(aPresContext, aPresShell, aListName,
aOldFrame);
}
nsresult
nsFirstLineFrame::AppendFrames2(nsIPresContext* aPresContext,
nsIFrame* aFrameList)
{
nsFrameList frames(aFrameList);
ReResolveChildList(aPresContext, mStyleContext, frames);
// XXX ReparentFrameView
mFrames.AppendFrames(this, aFrameList);
return NS_OK;
}
nsresult
nsFirstLineFrame::InsertFrames2(nsIPresContext* aPresContext,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
nsFrameList frames(aFrameList);
ReResolveChildList(aPresContext, mStyleContext, frames);
// XXX ReparentFrameView
mFrames.InsertFrames(this, aPrevFrame, aFrameList);
return NS_OK;
}
nsresult
nsFirstLineFrame::RemoveFrame2(nsIPresContext* aPresContext,
nsIFrame* aOldFrame)
{
nsIFrame* nextInFlow;
aOldFrame->GetNextInFlow(&nextInFlow);
if (nextInFlow) {
DeleteChildsNextInFlow(*aPresContext, aOldFrame);
}
mFrames.RemoveFrame(aOldFrame);
return NS_OK;
}
void
nsFirstLineFrame::RemoveFramesFrom(nsIFrame* aFrame)
{
nsIFrame* prevFrame = mFrames.GetPrevSiblingFor(aFrame);
if (prevFrame) {
prevFrame->SetNextSibling(nsnull);
}
else {
mFrames.SetFrames(nsnull);
}
}
nsIFrame*
nsFirstLineFrame::PullInlineFrame(nsIPresContext* aPresContext,
InlineReflowState& irs,
PRBool* aIsComplete)
{
nsIFrame* frame =
nsInlineFrame::PullInlineFrame(aPresContext, irs, aIsComplete);
if (frame && !mPrevInFlow) {
// We are a first-line frame. Fixup the child frames
// style-context that we just pulled.
frame->ReResolveStyleContext(aPresContext, mStyleContext,
NS_STYLE_HINT_REFLOW, nsnull, nsnull);
}
return frame;
}
void
nsFirstLineFrame::DrainOverflow(nsIPresContext* aPresContext)
{
// Check for an overflow list with our prev-in-flow
nsFirstLineFrame* prevInFlow = (nsFirstLineFrame*)mPrevInFlow;
if (nsnull != prevInFlow) {
if (prevInFlow->mOverflowFrames.NotEmpty()) {
ReResolveChildList(aPresContext, mStyleContext,
prevInFlow->mOverflowFrames);
mFrames.InsertFrames(this, nsnull, prevInFlow->mOverflowFrames);
}
}
// It's also possible that we have an overflow list for ourselves
if (mOverflowFrames.NotEmpty()) {
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
ReResolveChildList(aPresContext, mStyleContext, mOverflowFrames);
mFrames.AppendFrames(nsnull, mOverflowFrames);
}
}
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.
PullAnyFrame(&aPresContext, irs);
}
if (HaveAnonymousBlock()) {
if (!aReflowState.mLineLayout->LineIsEmpty()) {
// This inline frame cannot be placed on the current line
// because there already is an inline frame on this line (and we
// contain an anonymous block).
aStatus = NS_INLINE_LINE_BREAK_BEFORE();
rv = NS_OK;
}
else {
rv = ReflowBlockFrame(&aPresContext, aReflowState, irs,
aMetrics, aStatus);
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear
// it.
if ((aMetrics.mCombinedArea.x < 0) ||
(aMetrics.mCombinedArea.y < 0) ||
(aMetrics.mCombinedArea.XMost() > aMetrics.width) ||
(aMetrics.mCombinedArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
}
else {
if (wasEmpty) {
// Fixup style of frame just pulled up
nsIFrame* firstFrame = mFrames.FirstChild();
if (firstFrame) {
firstFrame->ReResolveStyleContext(&aPresContext, mStyleContext,
NS_STYLE_HINT_REFLOW, nsnull,
nsnull);
}
}
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 = PullInlineFrame(&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
ReResolveChildList(&aPresContext, mStyleContext, mFrames);
NS_RELEASE(newSC);
}
NS_RELEASE(parentContext);
}
}
}
rv = ReflowInlineFrames(&aPresContext, aReflowState, irs,
aMetrics, aStatus);
// Note: when we are reflowing inline frames the line layout code
// will properly compute our NS_FRAME_OUTSIDE_CHILDREN state for
// us.
}
return rv;
}
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