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gecko-dev/layout/generic/nsBlockFrame.cpp
dbaron%fas.harvard.edu 25c6910bda Fix overly long lines. r=kin sr=waterson b=106658
2001-11-15 07:30:09 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=2:et:sw=2:
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Clark <buster@netscape.com>
* Robert O'Callahan <roc+moz@cs.cmu.edu>
* L. David Baron <dbaron@fas.harvard.edu>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsBlockFrame.h"
#include "nsBlockReflowContext.h"
#include "nsBlockReflowState.h"
#include "nsBlockBandData.h"
#include "nsBulletFrame.h"
#include "nsLineBox.h"
#include "nsInlineFrame.h"
#include "nsLineLayout.h"
#include "nsPlaceholderFrame.h"
#include "nsStyleConsts.h"
#include "nsHTMLIIDs.h"
#include "nsCSSRendering.h"
#include "nsIFrameManager.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIReflowCommand.h"
#include "nsIStyleContext.h"
#include "nsIView.h"
#include "nsIFontMetrics.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLValue.h"
#include "nsIDOMEvent.h"
#include "nsIHTMLContent.h"
#include "prprf.h"
#include "nsLayoutAtoms.h"
#include "nsITextContent.h"
#include "nsStyleChangeList.h"
#include "nsISizeOfHandler.h"
#include "nsIFocusTracker.h"
#include "nsIFrameSelection.h"
#include "nsSpaceManager.h"
#include "nsIntervalSet.h"
#include "prenv.h"
#include "plstr.h"
#include "nsGUIEvent.h"
#ifdef IBMBIDI
#include "nsBidiPresUtils.h"
#endif // IBMBIDI
#include "nsIDOMHTMLBodyElement.h"
#include "nsIDOMHTMLHtmlElement.h"
#ifdef DEBUG
#include "nsBlockDebugFlags.h"
PRBool nsBlockFrame::gLamePaintMetrics;
PRBool nsBlockFrame::gLameReflowMetrics;
PRBool nsBlockFrame::gNoisy;
PRBool nsBlockFrame::gNoisyDamageRepair;
PRBool nsBlockFrame::gNoisyMaxElementSize;
PRBool nsBlockFrame::gNoisyReflow;
PRBool nsBlockFrame::gReallyNoisyReflow;
PRBool nsBlockFrame::gNoisySpaceManager;
PRBool nsBlockFrame::gVerifyLines;
PRBool nsBlockFrame::gDisableResizeOpt;
PRInt32 nsBlockFrame::gNoiseIndent;
struct BlockDebugFlags {
const char* name;
PRBool* on;
};
static BlockDebugFlags gFlags[] = {
{ "reflow", &nsBlockFrame::gNoisyReflow },
{ "really-noisy-reflow", &nsBlockFrame::gReallyNoisyReflow },
{ "max-element-size", &nsBlockFrame::gNoisyMaxElementSize },
{ "space-manager", &nsBlockFrame::gNoisySpaceManager },
{ "verify-lines", &nsBlockFrame::gVerifyLines },
{ "damage-repair", &nsBlockFrame::gNoisyDamageRepair },
{ "lame-paint-metrics", &nsBlockFrame::gLamePaintMetrics },
{ "lame-reflow-metrics", &nsBlockFrame::gLameReflowMetrics },
{ "disable-resize-opt", &nsBlockFrame::gDisableResizeOpt },
};
#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowDebugFlags()
{
printf("Here are the available GECKO_BLOCK_DEBUG_FLAGS:\n");
BlockDebugFlags* bdf = gFlags;
BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
for (; bdf < end; bdf++) {
printf(" %s\n", bdf->name);
}
printf("Note: GECKO_BLOCK_DEBUG_FLAGS is a comma seperated list of flag\n");
printf("names (no whitespace)\n");
}
void
nsBlockFrame::InitDebugFlags()
{
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_BLOCK_DEBUG_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* cm = PL_strchr(flags, ',');
if (cm) *cm = '\0';
PRBool found = PR_FALSE;
BlockDebugFlags* bdf = gFlags;
BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
for (; bdf < end; bdf++) {
if (PL_strcasecmp(bdf->name, flags) == 0) {
*(bdf->on) = PR_TRUE;
printf("nsBlockFrame: setting %s debug flag on\n", bdf->name);
gNoisy = PR_TRUE;
found = PR_TRUE;
break;
}
}
if (!found) {
error = PR_TRUE;
}
if (!cm) break;
*cm = ',';
flags = cm + 1;
}
if (error) {
ShowDebugFlags();
}
}
}
}
#endif
// add in a sanity check for absurdly deep frame trees. See bug 42138
// can't just use IsFrameTreeTooDeep() because that method has side effects we don't want
#define MAX_DEPTH_FOR_LIST_RENUMBERING 200 // 200 open displayable tags is pretty unrealistic
//----------------------------------------------------------------------
// Debugging support code
#ifdef DEBUG
static const char* kReflowCommandType[] = {
"ContentChanged",
"StyleChanged",
"ReflowDirty",
"UserDefined",
};
#endif
#ifdef REALLY_NOISY_FIRST_LINE
static void
DumpStyleGeneaology(nsIFrame* aFrame, const char* gap)
{
fputs(gap, stdout);
nsFrame::ListTag(stdout, aFrame);
printf(": ");
nsIStyleContext* sc;
aFrame->GetStyleContext(&sc);
while (nsnull != sc) {
nsIStyleContext* psc;
printf("%p ", sc);
psc = sc->GetParent();
NS_RELEASE(sc);
sc = psc;
}
printf("\n");
}
#endif
#ifdef REFLOW_STATUS_COVERAGE
static void
RecordReflowStatus(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
{
static PRUint32 record[2];
// 0: child-is-block
// 1: child-is-inline
PRIntn index = 0;
if (!aChildIsBlock) index |= 1;
// Compute new status
PRUint32 newS = record[index];
if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
newS |= 1;
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 2;
}
else {
newS |= 4;
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 8;
}
else {
newS |= 16;
}
// Log updates to the status that yield different values
if (record[index] != newS) {
record[index] = newS;
printf("record(%d): %02x %02x\n", index, record[0], record[1]);
}
}
#endif
//----------------------------------------------------------------------
void
nsBlockFrame::CombineRects(const nsRect& r1, nsRect& r2)
{
nscoord xa = r2.x;
nscoord ya = r2.y;
nscoord xb = xa + r2.width;
nscoord yb = ya + r2.height;
nscoord x = r1.x;
nscoord y = r1.y;
nscoord xmost = x + r1.width;
nscoord ymost = y + r1.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
r2.x = xa;
r2.y = ya;
r2.width = xb - xa;
r2.height = yb - ya;
}
//----------------------------------------------------------------------
const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
nsresult
NS_NewBlockFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsBlockFrame* it = new (aPresShell) nsBlockFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
*aNewFrame = it;
return NS_OK;
}
nsBlockFrame::nsBlockFrame()
{
#ifdef DEBUG
InitDebugFlags();
#endif
}
nsBlockFrame::~nsBlockFrame()
{
}
NS_IMETHODIMP
nsBlockFrame::Destroy(nsIPresContext* aPresContext)
{
mAbsoluteContainer.DestroyFrames(this, aPresContext);
// Outside bullets are not in our child-list so check for them here
// and delete them when present.
if (mBullet && HaveOutsideBullet()) {
mBullet->Destroy(aPresContext);
mBullet = nsnull;
}
mFloaters.DestroyFrames(aPresContext);
nsLineBox::DeleteLineList(aPresContext, mLines);
return nsBlockFrameSuper::Destroy(aPresContext);
}
NS_IMETHODIMP
nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(aInstancePtr, "null out param");
if (aIID.Equals(kBlockFrameCID)) {
*aInstancePtr = NS_STATIC_CAST(void*, NS_STATIC_CAST(nsBlockFrame*, this));
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsILineIterator)) ||
aIID.Equals(NS_GET_IID(nsILineIteratorNavigator)))
{
nsLineIterator* it = new nsLineIterator;
if (!it) {
*aInstancePtr = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it); // reference passed to caller
const nsStyleVisibility* visibility;
GetStyleData(eStyleStruct_Visibility, (const nsStyleStruct*&) visibility);
nsresult rv = it->Init(mLines,
visibility->mDirection == NS_STYLE_DIRECTION_RTL);
if (NS_FAILED(rv)) {
NS_RELEASE(it);
return rv;
}
*aInstancePtr = NS_STATIC_CAST(void*,
NS_STATIC_CAST(nsILineIteratorNavigator*, it));
return NS_OK;
}
return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
{
aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
return NS_OK;
}
#ifdef DEBUG
NS_METHOD
nsBlockFrame::List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
{
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", mParent);
#endif
nsIView* view;
GetView(aPresContext, &view);
if (nsnull != view) {
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, view));
}
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
}
// Output the flow linkage
if (nsnull != mPrevInFlow) {
fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, mPrevInFlow));
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
}
// Output the rect and state
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
PRInt32 numInlineLines = 0;
PRInt32 numBlockLines = 0;
if (! mLines.empty()) {
for (const_line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
if (line->IsBlock())
numBlockLines++;
else
numInlineLines++;
}
}
fprintf(out, " sc=%p(i=%d,b=%d)<\n",
NS_STATIC_CAST(void*, mStyleContext), numInlineLines, numBlockLines);
aIndent++;
// Output the lines
if (! mLines.empty()) {
for (const_line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
line->List(aPresContext, out, aIndent);
}
}
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
for (;;) {
nsIFrame* kid;
GetAdditionalChildListName(listIndex++, &listName);
if (nsnull == listName) {
break;
}
FirstChild(aPresContext, listName, &kid);
if (nsnull != kid) {
IndentBy(out, aIndent);
nsAutoString tmp;
if (nsnull != listName) {
listName->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
}
fputs("<\n", out);
while (nsnull != kid) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(CallQueryInterface(kid, &frameDebug))) {
frameDebug->List(aPresContext, out, aIndent + 1);
}
kid->GetNextSibling(&kid);
}
IndentBy(out, aIndent);
fputs(">\n", out);
}
NS_IF_RELEASE(listName);
}
aIndent--;
IndentBy(out, aIndent);
fputs(">\n", out);
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Block"), aResult);
}
#endif
NS_IMETHODIMP
nsBlockFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::blockFrame;
NS_ADDREF(*aType);
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////
// Child frame enumeration
NS_IMETHODIMP
nsBlockFrame::FirstChild(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame** aFirstChild) const
{
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
if (aListName == nsLayoutAtoms::absoluteList) {
return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild);
}
else if (nsnull == aListName) {
*aFirstChild = (mLines.empty()) ? nsnull : mLines.front()->mFirstChild;
return NS_OK;
}
else if (aListName == nsLayoutAtoms::overflowList) {
nsLineList* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
*aFirstChild = overflowLines
? overflowLines->front()->mFirstChild
: nsnull;
return NS_OK;
}
else if (aListName == nsLayoutAtoms::floaterList) {
*aFirstChild = mFloaters.FirstChild();
return NS_OK;
}
else if (aListName == nsLayoutAtoms::bulletList) {
if (HaveOutsideBullet()) {
*aFirstChild = mBullet;
}
else {
*aFirstChild = nsnull;
}
return NS_OK;
}
*aFirstChild = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
nsBlockFrame::GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const
{
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
if (aIndex < 0) {
return NS_ERROR_INVALID_ARG;
}
*aListName = nsnull;
switch (aIndex) {
case NS_BLOCK_FRAME_FLOATER_LIST_INDEX:
*aListName = nsLayoutAtoms::floaterList;
NS_ADDREF(*aListName);
break;
case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
*aListName = nsLayoutAtoms::bulletList;
NS_ADDREF(*aListName);
break;
case NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX:
*aListName = nsLayoutAtoms::absoluteList;
NS_ADDREF(*aListName);
break;
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Frame structure methods
//////////////////////////////////////////////////////////////////////
// Reflow methods
static void
CalculateContainingBlock(const nsHTMLReflowState& aReflowState,
nscoord aFrameWidth,
nscoord aFrameHeight,
nscoord& aContainingBlockWidth,
nscoord& aContainingBlockHeight)
{
aContainingBlockWidth = -1; // have reflow state calculate
aContainingBlockHeight = -1; // have reflow state calculate
// The issue there is that for a 'height' of 'auto' the reflow state code
// won't know how to calculate the containing block height because it's
// calculated bottom up. We don't really want to do this for the initial
// containing block so that's why we have the check for if the element
// is absolutely or relatively positioned
if (aReflowState.mStyleDisplay->IsAbsolutelyPositioned() ||
(NS_STYLE_POSITION_RELATIVE == aReflowState.mStyleDisplay->mPosition)) {
aContainingBlockWidth = aFrameWidth;
aContainingBlockHeight = aFrameHeight;
// Containing block is relative to the padding edge
nsMargin border;
if (!aReflowState.mStyleBorder->GetBorder(border)) {
NS_NOTYETIMPLEMENTED("percentage border");
}
aContainingBlockWidth -= border.left + border.right;
aContainingBlockHeight -= border.top + border.bottom;
}
}
NS_IMETHODIMP
nsBlockFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": begin %s reflow availSize=%d,%d computedSize=%d,%d\n",
nsHTMLReflowState::ReasonToString(aReflowState.reason),
aReflowState.availableWidth, aReflowState.availableHeight,
aReflowState.mComputedWidth, aReflowState.mComputedHeight);
}
if (gNoisy) {
gNoiseIndent++;
}
PRTime start = LL_ZERO; // Initialize these variablies to silence the compiler.
PRInt32 ctc = 0; // We only use these if they are set (gLameReflowMetrics).
if (gLameReflowMetrics) {
start = PR_Now();
ctc = nsLineBox::GetCtorCount();
}
#endif
// See if it's an incremental reflow command
if (eReflowReason_Incremental == aReflowState.reason) {
// Give the absolute positioning code a chance to handle it
nscoord containingBlockWidth;
nscoord containingBlockHeight;
PRBool handled;
nsRect childBounds;
CalculateContainingBlock(aReflowState, mRect.width, mRect.height,
containingBlockWidth, containingBlockHeight);
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
containingBlockWidth, containingBlockHeight,
handled, childBounds);
// If the incremental reflow command was handled by the absolute positioning
// code, then we're all done
if (handled) {
// Just return our current size as our desired size.
// XXX We need to know the overflow area for the flowed content, and
// we don't have a way to get that currently so for the time being pretend
// a resize reflow occured
#if 0
aMetrics.width = mRect.width;
aMetrics.height = mRect.height;
aMetrics.ascent = mRect.height;
aMetrics.descent = 0;
// Whether or not we're complete hasn't changed
aStatus = (nsnull != mNextInFlow) ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
#else
nsHTMLReflowState reflowState(aReflowState);
reflowState.reason = eReflowReason_Resize;
reflowState.reflowCommand = nsnull;
nsBlockFrame::Reflow(aPresContext, aMetrics, reflowState, aStatus);
#endif
// Factor the absolutely positioned child bounds into the overflow area
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
} else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
return NS_OK;
}
}
if (IsFrameTreeTooDeep(aReflowState, aMetrics)) {
#ifdef DEBUG_kipp
{
extern char* nsPresShell_ReflowStackPointerTop;
char marker;
char* newsp = (char*) &marker;
printf("XXX: frame tree is too deep; approx stack size = %d\n",
nsPresShell_ReflowStackPointerTop - newsp);
}
#endif
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
// Should we create a space manager?
nsSpaceManager* spaceManager;
nsSpaceManager* oldSpaceManager;
// XXXldb If we start storing the space manager in the frame rather
// than keeping it around only during reflow then we should create it
// only when there are actually floats to manage. Otherwise things
// like tables will gain significant bloat.
if (NS_BLOCK_SPACE_MGR & mState) {
oldSpaceManager = aReflowState.mSpaceManager;
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
spaceManager = new nsSpaceManager(shell, this);
if (!spaceManager)
return NS_ERROR_OUT_OF_MEMORY;
// Set the space manager in the existing reflow state
nsHTMLReflowState& reflowState =
NS_CONST_CAST(nsHTMLReflowState&, aReflowState);
reflowState.mSpaceManager = spaceManager;
#ifdef NOISY_SPACEMANAGER
printf("constructed new space manager %p (replacing %p)\n",
reflowState.mSpaceManager, oldSpaceManager);
#endif
}
nsBlockReflowState state(aReflowState, aPresContext, this, aMetrics,
NS_BLOCK_MARGIN_ROOT & mState);
if (eReflowReason_Resize != aReflowState.reason) {
#ifdef IBMBIDI
if (! mLines.empty()) {
PRBool bidiEnabled;
aPresContext->GetBidiEnabled(&bidiEnabled);
if (bidiEnabled) {
nsBidiPresUtils* bidiUtils;
aPresContext->GetBidiUtils(&bidiUtils);
if (bidiUtils) {
PRBool forceReflow;
nsresult rc = bidiUtils->Resolve(aPresContext, this,
mLines.front()->mFirstChild,
forceReflow);
if (NS_SUCCEEDED(rc) && forceReflow) {
// Mark everything dirty
// XXXldb This should be done right.
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
line->MarkDirty();
}
}
}
}
}
#endif // IBMBIDI
RenumberLists(aPresContext);
}
nsresult rv = NS_OK;
PRBool isStyleChange = PR_FALSE;
nsIFrame* target;
switch (aReflowState.reason) {
case eReflowReason_Initial:
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=initial\n");
#endif
DrainOverflowLines(aPresContext);
rv = PrepareInitialReflow(state);
mState &= ~NS_FRAME_FIRST_REFLOW;
break;
case eReflowReason_Dirty:
break;
case eReflowReason_Incremental: // should call GetNext() ?
aReflowState.reflowCommand->GetTarget(target);
if (this == target) {
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=incremental type=%d\n", type);
#endif
switch (type) {
case nsIReflowCommand::StyleChanged:
rv = PrepareStyleChangedReflow(state);
isStyleChange = PR_TRUE;
break;
case nsIReflowCommand::ReflowDirty:
break;
default:
// Map any other incremental operations into full reflows
rv = PrepareResizeReflow(state);
break;
}
}
else {
// Get next frame in reflow command chain
aReflowState.reflowCommand->GetNext(state.mNextRCFrame);
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=incremental");
if (state.mNextRCFrame) {
printf(" next=");
nsFrame::ListTag(stdout, state.mNextRCFrame);
}
printf("\n");
#endif
rv = PrepareChildIncrementalReflow(state);
}
break;
case eReflowReason_StyleChange:
DrainOverflowLines(aPresContext);
rv = PrepareStyleChangedReflow(state);
break;
case eReflowReason_Resize:
default:
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=resize (%d)\n", aReflowState.reason);
#endif
DrainOverflowLines(aPresContext);
rv = PrepareResizeReflow(state);
break;
}
NS_ASSERTION(NS_SUCCEEDED(rv), "setting up reflow failed");
if (NS_FAILED(rv)) return rv;
// Now reflow...
rv = ReflowDirtyLines(state);
NS_ASSERTION(NS_SUCCEEDED(rv), "reflow dirty lines failed");
if (NS_FAILED(rv)) return rv;
if (!state.GetFlag(BRS_ISINLINEINCRREFLOW)) {
// XXXwaterson are we sure we don't need to do this work if BRS_ISINLINEINCRREFLOW?
aStatus = state.mReflowStatus;
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
if (NS_STYLE_OVERFLOW_HIDDEN == aReflowState.mStyleDisplay->mOverflow) {
aStatus = NS_FRAME_COMPLETE;
}
else {
#ifdef DEBUG_kipp
ListTag(stdout); printf(": block is not complete\n");
#endif
}
}
// XXX_perf get rid of this!
BuildFloaterList();
}
// Compute our final size
ComputeFinalSize(aReflowState, state, aMetrics);
// see if verifyReflow is enabled, and if so store off the space manager pointer
#ifdef DEBUG
PRInt32 verifyReflowFlags = nsIPresShell::GetVerifyReflowFlags();
PRBool transferredSpaceManager = PR_FALSE;
if (VERIFY_REFLOW_INCLUDE_SPACE_MANAGER & verifyReflowFlags)
{
// this is a leak of the space manager, but it's only in debug if verify reflow is enabled, so not a big deal
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
if (shell) {
nsCOMPtr<nsIFrameManager> frameManager;
shell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
rv = frameManager->SetFrameProperty(
this, nsLayoutAtoms::spaceManagerProperty,
reflowState.mSpaceManager,
nsnull /* should be nsSpaceManagerDestroyer*/);
transferredSpaceManager = PR_TRUE;
}
}
}
#endif
// If we set the space manager, then restore the old space manager now that we're
// going out of scope
if (NS_BLOCK_SPACE_MGR & mState) {
nsHTMLReflowState& reflowState = NS_CONST_CAST(nsHTMLReflowState&, aReflowState);
#ifdef NOISY_SPACEMANAGER
printf("restoring old space manager %p\n", oldSpaceManager);
#endif
reflowState.mSpaceManager = oldSpaceManager;
#ifdef DEBUG
// For debugging, we sometimes transfer ownership to the frame manager
// (above).
if (!transferredSpaceManager)
#endif
delete spaceManager;
state.mSpaceManager = nsnull;
}
#ifdef NOISY_SPACEMANAGER
nsHTMLReflowState& reflowState = NS_CONST_CAST(nsHTMLReflowState&, aReflowState);
if (reflowState.mSpaceManager) {
ListTag(stdout);
printf(": space-manager %p after reflow\n", reflowState.mSpaceManager);
reflowState.mSpaceManager->List(stdout);
}
#endif
// If this is an incremental reflow and we changed size, then make sure our
// border is repainted if necessary
//
// XXXwaterson are we sure we can skip this if BRS_ISINLINEINCRREFLOW?
if (!state.GetFlag(BRS_ISINLINEINCRREFLOW) &&
(eReflowReason_Incremental == aReflowState.reason ||
eReflowReason_Dirty == aReflowState.reason)) {
if (isStyleChange) {
// This is only true if it's a style change reflow targeted at this
// frame (rather than an ancestor) (I think). That seems to be
// what's wanted here.
// Lots of things could have changed so damage our entire
// bounds
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 1 (%d, %d, %d, %d)\n",
this, 0, 0, mRect.width, mRect.height);
#endif
nsRect damageRect(0, 0, mRect.width, mRect.height);
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext,damageRect);
}
} else {
nsMargin border = aReflowState.mComputedBorderPadding -
aReflowState.mComputedPadding;
// See if our width changed
if ((aMetrics.width != mRect.width) && (border.right > 0)) {
nsRect damageRect;
if (aMetrics.width < mRect.width) {
// Our new width is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = aMetrics.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = aMetrics.height;
} else {
// Our new width is larger, so we need to erase our border in its
// old position
damageRect.x = mRect.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = mRect.height;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 2 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext, damageRect);
}
}
// See if our height changed
if ((aMetrics.height != mRect.height) && (border.bottom > 0)) {
nsRect damageRect;
if (aMetrics.height < mRect.height) {
// Our new height is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = 0;
damageRect.width = aMetrics.width;
damageRect.y = aMetrics.height - border.bottom;
damageRect.height = border.bottom;
} else {
// Our new height is larger, so we need to erase our border in its
// old position
damageRect.x = 0;
damageRect.width = mRect.width;
damageRect.y = mRect.height - border.bottom;
damageRect.height = border.bottom;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 3 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext, damageRect);
}
}
}
}
// Let the absolutely positioned container reflow any absolutely positioned
// child frames that need to be reflowed, e.g., elements with a percentage
// based width/height
//
// XXXwaterson are we sure we can skip this if BRS_ISINLINEINCRREFLOW?
if (NS_SUCCEEDED(rv) && mAbsoluteContainer.HasAbsoluteFrames()
&& !state.GetFlag(BRS_ISINLINEINCRREFLOW)) {
nscoord containingBlockWidth;
nscoord containingBlockHeight;
nsRect childBounds;
CalculateContainingBlock(aReflowState, aMetrics.width, aMetrics.height,
containingBlockWidth, containingBlockHeight);
rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
containingBlockWidth, containingBlockHeight,
childBounds);
// Factor the absolutely positioned child bounds into the overflow area
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
} else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
#ifdef DEBUG
if (gNoisy) {
gNoiseIndent--;
}
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
aMetrics.width, aMetrics.height,
aMetrics.mCarriedOutBottomMargin.get());
if (mState & NS_FRAME_OUTSIDE_CHILDREN) {
printf(" combinedArea={%d,%d,%d,%d}",
aMetrics.mOverflowArea.x,
aMetrics.mOverflowArea.y,
aMetrics.mOverflowArea.width,
aMetrics.mOverflowArea.height);
}
if (aMetrics.maxElementSize) {
printf(" maxElementSize=%d,%d",
aMetrics.maxElementSize->width,
aMetrics.maxElementSize->height);
}
printf("\n");
}
if (gLameReflowMetrics) {
PRTime end = PR_Now();
PRInt32 ectc = nsLineBox::GetCtorCount();
PRInt32 numLines = mLines.size();
if (!numLines) numLines = 1;
PRTime delta, perLineDelta, lines;
LL_I2L(lines, numLines);
LL_SUB(delta, end, start);
LL_DIV(perLineDelta, delta, lines);
ListTag(stdout);
char buf[400];
PR_snprintf(buf, sizeof(buf),
": %lld elapsed (%lld per line) (%d lines; %d new lines)",
delta, perLineDelta, numLines, ectc - ctc);
printf("%s\n", buf);
}
#endif
#ifdef NOISY_MAX_ELEMENT_SIZE
if (aMetrics.maxElementSize) {
printf("block %p returning with maxElementSize=%d,%d\n", this,
aMetrics.maxElementSize->width,
aMetrics.maxElementSize->height);
}
#endif
return rv;
}
static PRBool
HaveAutoWidth(const nsHTMLReflowState& aReflowState)
{
const nsHTMLReflowState* rs = &aReflowState;
if (NS_UNCONSTRAINEDSIZE == rs->mComputedWidth) {
return PR_TRUE;
}
const nsStylePosition* pos = rs->mStylePosition;
for (;;) {
if (!pos) {
return PR_TRUE;
}
nsStyleUnit widthUnit = pos->mWidth.GetUnit();
if (eStyleUnit_Auto == widthUnit) {
return PR_TRUE;
}
if (eStyleUnit_Inherit != widthUnit) {
break;
}
const nsHTMLReflowState* prs = rs->parentReflowState;
if (!prs) {
return PR_TRUE;
}
rs = prs;
pos = prs->mStylePosition;
}
return PR_FALSE;
}
// XXXldb why do we check vertical and horizontal at the same time? Don't
// we usually care about one or the other?
static PRBool
IsPercentageAwareChild(const nsIFrame* aFrame)
{
NS_ASSERTION(aFrame, "null frame is not allowed");
nsresult rv;
const nsStyleMargin* margin;
rv = aFrame->GetStyleData(eStyleStruct_Margin,(const nsStyleStruct*&) margin);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (nsLineLayout::IsPercentageUnitSides(&margin->mMargin)) {
return PR_TRUE;
}
const nsStylePadding* padding;
rv = aFrame->GetStyleData(eStyleStruct_Padding,(const nsStyleStruct*&) padding);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (nsLineLayout::IsPercentageUnitSides(&padding->mPadding)) {
return PR_TRUE;
}
const nsStyleBorder* border;
rv = aFrame->GetStyleData(eStyleStruct_Border,(const nsStyleStruct*&) border);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (nsLineLayout::IsPercentageUnitSides(&border->mBorder)) {
return PR_TRUE;
}
const nsStylePosition* pos;
rv = aFrame->GetStyleData(eStyleStruct_Position,(const nsStyleStruct*&) pos);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (eStyleUnit_Percent == pos->mWidth.GetUnit()
|| eStyleUnit_Percent == pos->mMaxWidth.GetUnit()
|| eStyleUnit_Percent == pos->mMinWidth.GetUnit()
|| eStyleUnit_Percent == pos->mHeight.GetUnit()
|| eStyleUnit_Percent == pos->mMinHeight.GetUnit()
|| eStyleUnit_Percent == pos->mMaxHeight.GetUnit()
|| nsLineLayout::IsPercentageUnitSides(&pos->mOffset)) { // XXX need more here!!!
return PR_TRUE;
}
return PR_FALSE;
}
void
nsBlockFrame::ComputeFinalSize(const nsHTMLReflowState& aReflowState,
nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
const nsMargin& borderPadding = aState.BorderPadding();
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": mY=%d mIsBottomMarginRoot=%s mPrevBottomMargin=%d bp=%d,%d\n",
aState.mY, aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ? "yes" : "no",
aState.mPrevBottomMargin,
borderPadding.top, borderPadding.bottom);
#endif
// XXXldb Handling min-width/max-width stuff after reflowing children
// seems wrong. But IIRC this function only does more than a little
// bit in rare cases (or something like that, I'm not really sure).
// What are those cases, and do we get the wrong behavior?
// Compute final width
nscoord maxWidth = 0, maxHeight = 0;
#ifdef NOISY_KIDXMOST
printf("%p aState.mKidXMost=%d\n", this, aState.mKidXMost);
#endif
nscoord minWidth = aState.mKidXMost + borderPadding.right;
if (!HaveAutoWidth(aReflowState)) {
// Use style defined width
aMetrics.width = borderPadding.left + aReflowState.mComputedWidth +
borderPadding.right;
// XXX quote css1 section here
if ((0 == aReflowState.mComputedWidth) && (aMetrics.width < minWidth)) {
aMetrics.width = minWidth;
}
// When style defines the width use it for the max-element-size
// because we can't shrink any smaller.
maxWidth = aMetrics.width;
}
else {
nscoord computedWidth = minWidth;
PRBool compact = PR_FALSE;
#if 0
if (NS_STYLE_DISPLAY_COMPACT == aReflowState.mStyleDisplay->mDisplay) {
// If we are display: compact AND we have no lines or we have
// exactly one line and that line is not a block line AND that
// line doesn't end in a BR of any sort THEN we remain a compact
// frame.
if ((mLines.empty()) ||
((mLines.front() == mLines.back()) && !mLines.front()->IsBlock() &&
(NS_STYLE_CLEAR_NONE == mLines.front()->GetBreakType())
/*XXX && (computedWidth <= aState.mCompactMarginWidth) */
)) {
compact = PR_TRUE;
}
}
#endif
// There are two options here. We either shrink wrap around our
// contents or we fluff out to the maximum block width. Note:
// We always shrink wrap when given an unconstrained width.
if ((0 == (NS_BLOCK_SHRINK_WRAP & mState)) &&
!aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) &&
!aState.GetFlag(BRS_SHRINKWRAPWIDTH) &&
!compact) {
// Set our width to the max width if we aren't already that
// wide. Note that the max-width has nothing to do with our
// contents (CSS2 section XXX)
computedWidth = borderPadding.left + aState.mContentArea.width +
borderPadding.right;
}
// See if we should compute our max element size
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
// Add in border and padding dimensions to already computed
// max-element-size values.
maxWidth = aState.mMaxElementSize.width +
borderPadding.left + borderPadding.right;
if (computedWidth < maxWidth) {
computedWidth = maxWidth;
}
}
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
nscoord computedMaxWidth = aReflowState.mComputedMaxWidth +
borderPadding.left + borderPadding.right;
if (computedWidth > computedMaxWidth) {
computedWidth = computedMaxWidth;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinWidth) {
nscoord computedMinWidth = aReflowState.mComputedMinWidth +
borderPadding.left + borderPadding.right;
if (computedWidth < computedMinWidth) {
computedWidth = computedMinWidth;
}
}
aMetrics.width = computedWidth;
// If we're shrink wrapping, then now that we know our final width we
// need to do horizontal alignment of the inline lines and make sure
// blocks are correctly sized and positioned. Any lines that need
// final adjustment will have been marked as dirty
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH) && aState.GetFlag(BRS_NEEDRESIZEREFLOW)) {
// If the parent reflow state is also shrink wrap width, then
// we don't need to do this, because it will reflow us after it
// calculates the final width
PRBool parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
if (!parentIsShrinkWrapWidth) {
nsHTMLReflowState reflowState(aReflowState);
reflowState.mComputedWidth = aMetrics.width - borderPadding.left -
borderPadding.right;
reflowState.reason = eReflowReason_Resize;
reflowState.mSpaceManager->ClearRegions();
#ifdef DEBUG
nscoord oldDesiredWidth = aMetrics.width;
#endif
nsBlockReflowState state(reflowState, aState.mPresContext, this, aMetrics,
NS_BLOCK_MARGIN_ROOT & mState);
ReflowDirtyLines(state);
aState.mY = state.mY;
NS_ASSERTION(oldDesiredWidth == aMetrics.width, "bad desired width");
}
}
}
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
PRBool parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
}
// Compute final height
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
// Use style defined height
aMetrics.height = borderPadding.top + aReflowState.mComputedHeight +
borderPadding.bottom;
// When style defines the height use it for the max-element-size
// because we can't shrink any smaller.
maxHeight = aMetrics.height;
// Don't carry out a bottom margin when our height is fixed
// unless the bottom of the last line adjoins the bottom of our
// content area.
if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
if (aState.mY + aState.mPrevBottomMargin.get() != aMetrics.height) {
aState.mPrevBottomMargin.Zero();
}
}
}
else {
nscoord autoHeight = aState.mY;
// Shrink wrap our height around our contents.
if (aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
// When we are a bottom-margin root make sure that our last
// childs bottom margin is fully applied.
// XXX check for a fit
autoHeight += aState.mPrevBottomMargin.get();
}
autoHeight += borderPadding.bottom;
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxHeight) {
nscoord computedMaxHeight = aReflowState.mComputedMaxHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight > computedMaxHeight) {
autoHeight = computedMaxHeight;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinHeight) {
nscoord computedMinHeight = aReflowState.mComputedMinHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight < computedMinHeight) {
autoHeight = computedMinHeight;
}
}
aMetrics.height = autoHeight;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
maxHeight = aState.mMaxElementSize.height +
borderPadding.top + borderPadding.bottom;
}
}
aMetrics.ascent = mAscent;
aMetrics.descent = aMetrics.height - aMetrics.ascent;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
// Store away the final value
aMetrics.maxElementSize->width = maxWidth;
aMetrics.maxElementSize->height = maxHeight;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::CFS: %p returning MES %d\n",
this, aMetrics.maxElementSize->width);
#endif
}
// Return bottom margin information
// rbs says he hit this assertion occasionally (see bug 86947), so
// just set the margin to zero and we'll figure out why later
//NS_ASSERTION(aMetrics.mCarriedOutBottomMargin.IsZero(),
// "someone else set the margin");
if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT))
aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
else
aMetrics.mCarriedOutBottomMargin.Zero();
#ifdef DEBUG_blocks
if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
ListTag(stdout);
printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
}
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE) &&
((maxWidth > aMetrics.width) || (maxHeight > aMetrics.height))) {
ListTag(stdout);
printf(": WARNING: max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.mReflowState.availableWidth,
aState.mReflowState.availableHeight);
}
#endif
#ifdef NOISY_MAX_ELEMENT_SIZE
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.mReflowState.availableWidth,
aState.mReflowState.availableHeight);
}
#endif
// If we're requested to update our maximum width, then compute it
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
// We need to add in for the right border/padding
// XXXldb Why right and not left?
aMetrics.mMaximumWidth = aState.mMaximumWidth + borderPadding.right;
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ComputeFinalSize block %p setting aMetrics.mMaximumWidth to %d\n", this, aMetrics.mMaximumWidth);
#endif
}
// Compute the combined area of our children
// XXX_perf: This can be done incrementally
nscoord xa = 0, ya = 0, xb = aMetrics.width, yb = aMetrics.height;
if (NS_STYLE_OVERFLOW_HIDDEN != aReflowState.mStyleDisplay->mOverflow) {
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
// Compute min and max x/y values for the reflowed frame's
// combined areas
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nscoord x = lineCombinedArea.x;
nscoord y = lineCombinedArea.y;
nscoord xmost = x + lineCombinedArea.width;
nscoord ymost = y + lineCombinedArea.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
}
// Factor the bullet in; normally the bullet will be factored into
// the line-box's combined area. However, if the line is a block
// line then it won't; if there are no lines, it won't. So just
// factor it in anyway (it can't hurt if it was already done).
// XXXldb Can we just fix GetCombinedArea instead?
if (mBullet) {
nsRect r;
mBullet->GetRect(r);
if (r.x < xa) xa = r.x;
if (r.y < ya) ya = r.y;
nscoord xmost = r.XMost();
if (xmost > xb) xb = xmost;
nscoord ymost = r.YMost();
if (ymost > yb) yb = ymost;
}
}
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": ca=%d,%d,%d,%d\n", xa, ya, xb-xa, yb-ya);
#endif
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
aMetrics.mOverflowArea.x = xa;
aMetrics.mOverflowArea.y = ya;
aMetrics.mOverflowArea.width = xb - xa;
aMetrics.mOverflowArea.height = yb - ya;
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
if (NS_BLOCK_WRAP_SIZE & mState) {
// When the area frame is supposed to wrap around all in-flow
// children, make sure it is big enough to include those that stick
// outside the box.
if (NS_FRAME_OUTSIDE_CHILDREN & mState) {
nscoord xMost = aMetrics.mOverflowArea.XMost();
if (xMost > aMetrics.width) {
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": changing desired width from %d to %d\n", aMetrics.width, xMost);
#endif
aMetrics.width = xMost;
}
nscoord yMost = aMetrics.mOverflowArea.YMost();
if (yMost > aMetrics.height) {
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": changing desired height from %d to %d\n", aMetrics.height, yMost);
#endif
aMetrics.height = yMost;
// adjust descent to absorb any excess difference
aMetrics.descent = aMetrics.height - aMetrics.ascent;
}
}
}
}
nsresult
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
{
PrepareResizeReflow(aState);
return NS_OK;
}
nsresult
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
{
// Determine the line being impacted
PRBool isFloater;
line_iterator line;
FindLineFor(aState.mNextRCFrame, &isFloater, &line);
if (line == end_lines()) {
// This assertion actually fires on lots of pages
// (e.g., bugzilla, bugzilla query page), so limit it
// to a few people until we fix the problem causing it.
//
// I think waterson explained once why it was happening -- I think
// it has something to do with the interaction of the unconstrained
// reflow in multi-pass reflow with the reflow command's chain, but
// I don't remember the details.
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
NS_NOTREACHED("We don't have a line for the target of the reflow. "
"Being inefficient");
#endif
// This can't happen, but just in case it does...
return PrepareResizeReflow(aState);
}
// XXX: temporary: If the child frame is a floater then punt
// XXX_perf XXXldb How big a perf problem is this?
if (isFloater) {
return PrepareResizeReflow(aState);
}
if (line->IsInline()) {
aState.SetFlag(BRS_ISINLINEINCRREFLOW, PR_TRUE);
}
// Just mark this line dirty. We never need to mark the
// previous line dirty since either:
// * the line is a block, and there would never be a chance to pull
// something up
// * It's an incremental reflow to something within an inline, which
// we know must be very limited.
line->MarkDirty();
return NS_OK;
}
nsresult
nsBlockFrame::MarkLineDirty(line_iterator aLine)
{
// Mark aLine dirty
aLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark line %p dirty\n", NS_STATIC_CAST(void*, aLine.get()));
}
#endif
// Mark previous line dirty if its an inline line so that it can
// maybe pullup something from the line just affected.
// XXX We don't need to do this if aPrevLine ends in a break-after...
if (aLine != mLines.front() &&
aLine->IsInline() &&
aLine.prev()->IsInline()) {
aLine.prev()->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark prev-line %p dirty\n",
NS_STATIC_CAST(void*, aLine.prev().get()));
}
#endif
}
return NS_OK;
}
nsresult
nsBlockFrame::UpdateBulletPosition(nsBlockReflowState& aState)
{
if (nsnull == mBullet) {
// Don't bother if there is no bullet
return NS_OK;
}
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
if (mBullet && HaveOutsideBullet()) {
// We now have an inside bullet, but used to have an outside
// bullet. Adjust the frame line list
if (! mLines.empty()) {
// if we have a line already, then move the bullet to the front of the
// first line
nsIFrame* child = nsnull;
nsLineBox* firstLine = mLines.front();
#ifdef DEBUG
// bullet should not have any siblings if it was an outside bullet
nsIFrame* next = nsnull;
mBullet->GetNextSibling(&next);
NS_ASSERTION(!next, "outside bullet should not have siblings");
#endif
// move bullet to front and chain the previous frames, and update the line count
child = firstLine->mFirstChild;
firstLine->mFirstChild = mBullet;
mBullet->SetNextSibling(child);
PRInt32 count = firstLine->GetChildCount();
firstLine->SetChildCount(count+1);
// dirty it here in case the caller does not
firstLine->MarkDirty();
} else {
// no prior lines, just create a new line for the bullet
nsLineBox* line = aState.NewLineBox(mBullet, 1, PR_FALSE);
if (!line) {
return NS_ERROR_OUT_OF_MEMORY;
}
mLines.push_back(line);
}
}
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
else {
if (!HaveOutsideBullet()) {
// We now have an outside bullet, but used to have an inside
// bullet. Take the bullet frame out of the first lines frame
// list.
if ((! mLines.empty()) && (mBullet == mLines.front()->mFirstChild)) {
nsIFrame* next;
mBullet->GetNextSibling(&next);
mBullet->SetNextSibling(nsnull);
PRInt32 count = mLines.front()->GetChildCount() - 1;
NS_ASSERTION(count >= 0, "empty line w/o bullet");
mLines.front()->SetChildCount(count);
if (0 == count) {
nsLineBox* oldFront = mLines.front();
mLines.pop_front();
aState.FreeLineBox(oldFront);
if (! mLines.empty()) {
mLines.front()->MarkDirty();
}
}
else {
mLines.front()->mFirstChild = next;
mLines.front()->MarkDirty();
}
}
}
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
nsresult
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
{
nsresult rv = UpdateBulletPosition(aState);
// Mark everything dirty
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
line->MarkDirty();
}
return rv;
}
nsresult
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
{
// See if we can try and avoid marking all the lines as dirty
PRBool tryAndSkipLines = PR_FALSE;
// we need to calculate if any part of then block itself
// is impacted by a floater (bug 19579)
aState.GetAvailableSpace();
// See if this is this a constrained resize reflow that is not impacted by floaters
if ((! aState.IsImpactedByFloater()) &&
(aState.mReflowState.reason == eReflowReason_Resize) &&
(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableWidth)) {
// If the text is left-aligned, then we try and avoid reflowing the lines
const nsStyleText* styleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if ((NS_STYLE_TEXT_ALIGN_LEFT == styleText->mTextAlign) ||
((NS_STYLE_TEXT_ALIGN_DEFAULT == styleText->mTextAlign) &&
(NS_STYLE_DIRECTION_LTR == aState.mReflowState.mStyleVisibility->mDirection))) {
tryAndSkipLines = PR_TRUE;
}
}
#ifdef DEBUG
if (gDisableResizeOpt) {
tryAndSkipLines = PR_FALSE;
}
if (gNoisyReflow) {
if (!tryAndSkipLines) {
const nsStyleText* mStyleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": marking all lines dirty: reason=%d availWidth=%d textAlign=%d\n",
aState.mReflowState.reason,
aState.mReflowState.availableWidth,
mStyleText->mTextAlign);
}
}
#endif
if (tryAndSkipLines) {
nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left;
if (NS_SHRINKWRAPWIDTH == aState.mReflowState.mComputedWidth) {
if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedMaxWidth) {
newAvailWidth += aState.mReflowState.mComputedMaxWidth;
}
else {
newAvailWidth += aState.mReflowState.availableWidth;
}
} else {
if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedWidth) {
newAvailWidth += aState.mReflowState.mComputedWidth;
}
else {
newAvailWidth += aState.mReflowState.availableWidth;
}
}
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != newAvailWidth, "bad math, newAvailWidth is infinite");
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": trying to avoid marking all lines dirty\n");
}
#endif
PRBool wrapping = !aState.GetFlag(BRS_NOWRAP);
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
// We let child blocks make their own decisions the same
// way we are here.
//
// For inline lines with no-wrap, the only way things
// could change is if there is a percentage-sized child.
if (line->IsBlock() ||
line->HasPercentageChild() ||
(wrapping &&
((line != mLines.back() && !line->HasBreak()) ||
line->ResizeReflowOptimizationDisabled() ||
line->HasFloaters() ||
line->IsImpactedByFloater() ||
(line->mBounds.XMost() > newAvailWidth)))) {
line->MarkDirty();
}
#ifdef REALLY_NOISY_REFLOW
if (!line->IsBlock()) {
printf("PrepareResizeReflow thinks line %p is %simpacted by floaters\n",
line, line->IsImpactedByFloater() ? "" : "not ");
}
#endif
#ifdef DEBUG
if (gNoisyReflow && !line->IsDirty() && wrapping) {
IndentBy(stdout, gNoiseIndent + 1);
printf("skipped: line=%p next=%p %s %s %s%s%s breakType=%d xmost=%d\n",
NS_STATIC_CAST(void*, line.get()),
NS_STATIC_CAST(void*, line.next().get()),
line->IsBlock() ? "block" : "inline",
"wrapping",
line->HasBreak() ? "has-break " : "",
line->HasFloaters() ? "has-floaters " : "",
line->IsImpactedByFloater() ? "impacted " : "",
line->GetBreakType(),
line->mBounds.XMost());
}
#endif
}
}
else {
// Mark everything dirty
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
line->MarkDirty();
}
}
return NS_OK;
}
//----------------------------------------
PRBool
nsBlockFrame::FindLineFor(nsIFrame* aFrame,
PRBool* aIsFloaterResult,
line_iterator* aFoundLine)
{
// This assertion actually fires on lots of pages (e.g., bugzilla,
// bugzilla query page), so limit it to a few people until we fix the
// problem causing it. It's related to the similarly |#ifdef|ed
// assertion in |PrepareChildIncrementalReflow|.
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
NS_PRECONDITION(aFrame, "why pass a null frame?");
#endif
PRBool isFloater = PR_FALSE;
line_iterator line = begin_lines(),
line_end = end_lines();
for ( ; line != line_end; ++line) {
if (line->Contains(aFrame)) {
break;
}
// XXXldb what does this do?
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
if (aFrame == fc->mPlaceholder->GetOutOfFlowFrame()) {
isFloater = PR_TRUE;
goto done;
}
fc = fc->Next();
}
}
}
done:
*aIsFloaterResult = isFloater;
*aFoundLine = line;
return (line != line_end);
}
// SEC: added GetCurrentLine() for bug 45152
// we need a way for line layout to know what line is being reflowed,
// but we don't want to expose the innards of nsBlockReflowState.
nsresult
nsBlockFrame::GetCurrentLine(nsBlockReflowState *aState, nsLineBox ** aOutCurrentLine)
{
if (!aState || !aOutCurrentLine) return NS_ERROR_FAILURE;
*aOutCurrentLine = aState->mCurrentLine;
return NS_OK;
}
/**
* Remember regions of reflow damage from floaters that changed size (so
* far, only vertically, which is a bug) in the space manager so that we
* can mark any impacted lines dirty in |PropagateFloaterDamage|.
*/
void
nsBlockFrame::RememberFloaterDamage(nsBlockReflowState& aState,
nsLineBox* aLine,
const nsRect& aOldCombinedArea)
{
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if (lineCombinedArea != aLine->mBounds &&
lineCombinedArea != aOldCombinedArea) {
// The line's combined-area changed. Therefore we need to damage
// the lines below that were previously (or are now) impacted by
// the change. It's possible that a floater shrunk or grew so
// use the larger of the impacted area.
// XXXldb If just the width of the floater changed, then this code
// won't be triggered and the code below (in |PropagateFloaterDamage|)
// won't kick in for "non-Block lines". See
// "XXX: Maybe the floater itself changed size?" below.
//
// This is a major flaw in this code.
//
nscoord newYMost = lineCombinedArea.YMost();
nscoord oldYMost = aOldCombinedArea.YMost();
nscoord impactYB = newYMost < oldYMost ? oldYMost : newYMost;
nscoord impactYA = lineCombinedArea.y;
nsSpaceManager *spaceManager = aState.mReflowState.mSpaceManager;
spaceManager->IncludeInDamage(impactYA, impactYB);
}
}
/**
* Propagate reflow "damage" from from earlier lines to the current
* line. The reflow damage comes from the following sources:
* 1. The regions of floater damage remembered in
* |RememberFloaterDamage|.
* 2. The combination of nonzero |aDeltaY| and any impact by a floater,
* either the previous reflow or now.
*
* When entering this function, |aLine| is still at its old position and
* |aDeltaY| indicates how much it will later be slid (assuming it
* doesn't get marked dirty and reflowed entirely).
*/
void
nsBlockFrame::PropagateFloaterDamage(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aDeltaY)
{
NS_PRECONDITION(!aLine->IsDirty(), "should never be called on dirty lines");
// Check the damage region recorded in the float damage.
nsSpaceManager *spaceManager = aState.mReflowState.mSpaceManager;
if (spaceManager->HasFloatDamage()) {
nscoord lineYA = aLine->mBounds.y + aDeltaY;
nscoord lineYB = lineYA + aLine->mBounds.height;
if (spaceManager->IntersectsDamage(lineYA, lineYB)) {
aLine->MarkDirty();
return;
}
}
if (aDeltaY) {
// Cases we need to find:
//
// 1. the line was impacted by a floater and now isn't
// 2. the line wasn't impacted by a floater and now is
// 3. the line is impacted by a floater both before and after and
// the floater has changed position relative to the line (or it's
// a different floater). (XXXPerf we don't currently
// check whether the floater changed size. We currently just
// mark blocks dirty and ignore any possibility of damage to
// inlines by it being a different floater with a different
// size.)
//
// XXXPerf: An optimization: if the line was and is completely
// impacted by a floater and the floater hasn't changed size,
// then we don't need to mark the line dirty.
aState.GetAvailableSpace(aLine->mBounds.y + aDeltaY);
PRBool wasImpactedByFloater = aLine->IsImpactedByFloater();
PRBool isImpactedByFloater = aState.IsImpactedByFloater();
#ifdef REALLY_NOISY_REFLOW
printf("nsBlockFrame::PropagateFloaterDamage %p was = %d, is=%d\n",
this, wasImpactedByFloater, isImpactedByFloater);
#endif
// Mark the line dirty if:
// 1. It used to be impacted by a floater and now isn't, or vice
// versa.
// 2. It is impacted by a floater and it is a block, which means
// that more or less of the line could be impacted than was in
// the past. (XXXPerf This could be optimized further, since
// we're marking the whole line dirty.)
if ((wasImpactedByFloater != isImpactedByFloater) ||
(isImpactedByFloater && aLine->IsBlock())) {
aLine->MarkDirty();
}
}
}
// NOTE: The first parameter *must* be passed by value.
static PRBool
WrappedLinesAreDirty(nsLineList::iterator aLine,
const nsLineList::iterator aLineEnd)
{
if (aLine->IsInline()) {
while (aLine->IsLineWrapped()) {
++aLine;
if (aLine == aLineEnd) {
break;
}
NS_ASSERTION(!aLine->IsBlock(), "didn't expect a block line");
if (aLine->IsDirty()) {
// we found a continuing line that is dirty
return PR_TRUE;
}
}
}
return PR_FALSE;
}
PRBool nsBlockFrame::IsIncrementalDamageConstrained(const nsBlockReflowState& aState) const
{
// see if the reflow will go through a text control. if so, we can optimize
// because we know the text control won't change size.
if (aState.mReflowState.reflowCommand)
{
nsIFrame *target;
aState.mReflowState.reflowCommand->GetTarget(target);
while (target)
{ // starting with the target's parent, scan for a text control
nsIFrame *parent;
target->GetParent(&parent);
if ((nsIFrame*)this==parent || !parent) // the null check is paranoia, it should never happen
break; // we found ourself, so we know there's no text control between us and target
nsCOMPtr<nsIAtom> frameType;
parent->GetFrameType(getter_AddRefs(frameType));
if (frameType)
{
if (nsLayoutAtoms::textInputFrame == frameType.get())
return PR_TRUE; // damage is constrained to the text control innards
}
target = parent; // advance the loop up the frame tree
}
}
return PR_FALSE; // default case, damage is not constrained (or unknown)
}
static void PlaceFrameView(nsIPresContext* aPresContext, nsIFrame* aFrame);
/**
* Reflow the dirty lines
*/
nsresult
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
{
nsresult rv = NS_OK;
PRBool keepGoing = PR_TRUE;
PRBool repositionViews = PR_FALSE; // should we really need this?
#ifdef DEBUG
if (gNoisyReflow) {
if (aState.mReflowState.reason == eReflowReason_Incremental) {
nsIReflowCommand::ReflowType type;
aState.mReflowState.reflowCommand->GetType(type);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": incrementally reflowing dirty lines: type=%s(%d) isInline=%s",
kReflowCommandType[type], type,
aState.GetFlag(BRS_ISINLINEINCRREFLOW) ? "true" : "false");
}
else {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": reflowing dirty lines");
}
printf(" computedWidth=%d\n", aState.mReflowState.mComputedWidth);
gNoiseIndent++;
}
#endif
// Check whether this is an incremental reflow
PRBool incrementalReflow = aState.mReflowState.reason ==
eReflowReason_Incremental ||
aState.mReflowState.reason ==
eReflowReason_Dirty;
// the amount by which we will slide the current line if it is not
// dirty
nscoord deltaY = 0;
// whether we did NOT reflow the previous line and thus we need to
// recompute the carried out margin before the line if we want to
// reflow it or if its previous margin is dirty
PRBool needToRecoverMargin = PR_FALSE;
// Reflow the lines that are already ours
line_iterator line = begin_lines(), line_end = end_lines();
for ( ; line != line_end; ++line, aState.AdvanceToNextLine()) {
#ifdef DEBUG
if (gNoisyReflow) {
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d dirty=%s oldBounds={%d,%d,%d,%d} oldCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
NS_STATIC_CAST(void*, line.get()), aState.mY,
line->IsDirty() ? "yes" : "no",
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin.get());
gNoiseIndent++;
}
#endif
// If we're supposed to update our maximum width, then we'll also need to
// reflow this line if it's line wrapped and any of the continuing lines
// are dirty. If we are printing (constrained height), always reflow the line
if ((NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableHeight) ||
(!line->IsDirty() &&
aState.GetFlag(BRS_COMPUTEMAXWIDTH) &&
::WrappedLinesAreDirty(line, line_end))) {
line->MarkDirty();
}
// Make sure |aState.mPrevBottomMargin| is at the correct position
// before calling PropagateFloaterDamage.
if (needToRecoverMargin) {
needToRecoverMargin = PR_FALSE;
// We need to reconstruct the bottom margin only if we didn't
// reflow the previous line and we do need to reflow (or repair
// the top position of) the next line.
if (line->IsDirty() || line->IsPreviousMarginDirty())
aState.ReconstructMarginAbove(line);
}
if (line->IsPreviousMarginDirty() && !line->IsDirty()) {
// If the previous margin is dirty and we're not going to reflow
// the line we need to pull out the correct top margin and set
// |deltaY| correctly.
// If there's float damage we might end up doing this work twice,
// but whatever...
if (line->IsBlock()) {
// XXXPerf We could actually make this faster by stealing code
// from the top of nsBlockFrame::ReflowBlockFrame, but it's an
// edge case that will generally happen at most once in a given
// reflow (insertion of a new line before a block)
line->MarkDirty();
} else {
deltaY = aState.mY + aState.mPrevBottomMargin.get() - line->mBounds.y;
}
}
line->ClearPreviousMarginDirty();
// See if there's any reflow damage that requires that we mark the
// line dirty.
if (!line->IsDirty()) {
PropagateFloaterDamage(aState, line, deltaY);
}
// Now repair the line and update |aState.mY| by calling
// |ReflowLine| or |SlideLine|.
if (line->IsDirty()) {
// Compute the dirty lines "before" YMost, after factoring in
// the running deltaY value - the running value is implicit in
// aState.mY.
nscoord oldY = line->mBounds.y;
nscoord oldYMost = line->mBounds.YMost();
nsRect oldCombinedArea;
line->GetCombinedArea(&oldCombinedArea);
// Reflow the dirty line. If it's an incremental reflow, then force
// it to invalidate the dirty area if necessary
PRBool forceInvalidate = PR_FALSE;
if (incrementalReflow) {
forceInvalidate = !IsIncrementalDamageConstrained(aState);
}
rv = ReflowLine(aState, line, &keepGoing, forceInvalidate);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
DeleteLine(aState, line, line_end);
}
break;
}
if (oldY == 0 && deltaY != line->mBounds.y) {
// This means the current line was just reflowed for the first
// time. Thus we must mark the the previous margin of the next
// line dirty.
// XXXldb Move this into where we insert the line! (or will
// that mess up deltaY manipulation?)
if (line.next() != end_lines()) {
line.next()->MarkPreviousMarginDirty();
// since it's marked dirty, nobody will care about |deltaY|
}
} else {
deltaY = line->mBounds.YMost() - oldYMost;
}
// Remember any things that could potentially be changes in the
// positions of floaters in this line so that we later damage the
// lines adjacent to those changes.
RememberFloaterDamage(aState, line, oldCombinedArea);
} else {
if (deltaY != 0)
SlideLine(aState, line, deltaY);
else
repositionViews = PR_TRUE;
// XXX EVIL O(N^2) EVIL
aState.RecoverStateFrom(line, deltaY);
// Keep mY up to date in case we're propagating reflow damage.
aState.mY = line->mBounds.YMost();
needToRecoverMargin = PR_TRUE;
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d newBounds={%d,%d,%d,%d} newCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
NS_STATIC_CAST(void*, line.get()), aState.mY,
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin.get());
}
#endif
}
if (needToRecoverMargin) {
// Is this expensive?
aState.ReconstructMarginAbove(line);
}
// Should we really have to do this?
if (repositionViews)
::PlaceFrameView(aState.mPresContext, this);
// Pull data from a next-in-flow if there's still room for more
// content here.
while (keepGoing && (nsnull != aState.mNextInFlow)) {
// Grab first line from our next-in-flow
nsBlockFrame* nextInFlow = aState.mNextInFlow;
line_iterator nifLine = nextInFlow->begin_lines();
if (nifLine == nextInFlow->end_lines()) {
aState.mNextInFlow = (nsBlockFrame*) aState.mNextInFlow->mNextInFlow;
continue;
}
// XXX See if the line is not dirty; if it's not maybe we can
// avoid the pullup if it can't fit?
nsLineBox *toMove = nifLine;
nextInFlow->mLines.erase(nifLine);
if (0 == toMove->GetChildCount()) {
// The line is empty. Try the next one.
NS_ASSERTION(nsnull == toMove->mFirstChild, "bad empty line");
aState.FreeLineBox(toMove);
continue;
}
// XXX move to a subroutine: run-in, overflow, pullframe and this do this
// Make the children in the line ours.
nsIFrame* frame = toMove->mFirstChild;
nsIFrame* lastFrame = nsnull;
PRInt32 n = toMove->GetChildCount();
while (--n >= 0) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, mNextInFlow, this);
lastFrame = frame;
frame->GetNextSibling(&frame);
}
lastFrame->SetNextSibling(nsnull);
// Add line to our line list
if (aState.mPrevChild)
aState.mPrevChild->SetNextSibling(toMove->mFirstChild);
line = mLines.before_insert(end_lines(), toMove);
// If line contains floaters, remove them from aState.mNextInFlow's
// floater list. They will be pushed onto this blockframe's floater
// list, via BuildFloaterList(), when we are done reflowing dirty lines.
//
// XXX: If the call to BuildFloaterList() is removed from
// nsBlockFrame::Reflow(), we'll probably need to manually
// append the floaters to |this|'s floater list.
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
if (fc->mPlaceholder) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
if (floater)
aState.mNextInFlow->mFloaters.RemoveFrame(floater);
}
fc = fc->Next();
}
}
// Now reflow it and any lines that it makes during it's reflow
// (we have to loop here because reflowing the line may case a new
// line to be created; see SplitLine's callers for examples of
// when this happens).
while (line != end_lines()) {
rv = ReflowLine(aState, line, &keepGoing,
incrementalReflow /* force invalidate */);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
DeleteLine(aState, line, line_end);
}
break;
}
// If this is an inline frame then its time to stop
++line;
aState.AdvanceToNextLine();
}
}
// Handle an odd-ball case: a list-item with no lines
if (mBullet && HaveOutsideBullet() && mLines.empty()) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// There are no lines so we have to fake up some y motion so that
// we end up with *some* height.
aState.mY += metrics.height;
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": done reflowing dirty lines (status=%x)\n",
aState.mReflowStatus);
}
#endif
return rv;
}
void
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
nsLineList::iterator aLine,
nsLineList::iterator aLineEnd)
{
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
if (0 == aLine->GetChildCount()) {
NS_ASSERTION(aState.mCurrentLine == aLine,
"using function more generally than designed, "
"but perhaps OK now");
nsLineBox *line = aLine;
aLine = mLines.erase(aLine);
aState.FreeLineBox(line);
// Mark the previous margin of the next line dirty since we need to
// recompute its top position.
if (aLine != aLineEnd)
aLine->MarkPreviousMarginDirty();
}
}
/**
* Reflow a line. The line will either contain a single block frame
* or contain 1 or more inline frames. aKeepReflowGoing indicates
* whether or not the caller should continue to reflow more lines.
*/
nsresult
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRBool aDamageDirtyArea)
{
nsresult rv = NS_OK;
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "reflowing empty line");
// Setup the line-layout for the new line
aState.mCurrentLine = aLine;
aLine->ClearDirty();
// Now that we know what kind of line we have, reflow it
nsRect oldCombinedArea;
aLine->GetCombinedArea(&oldCombinedArea);
if (aLine->IsBlock()) {
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
// We expect blocks to damage any area inside their bounds that is
// dirty; however, if the frame changes size or position then we
// need to do some repainting
if (aDamageDirtyArea) {
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if ((oldCombinedArea.x != lineCombinedArea.x) ||
(oldCombinedArea.y != lineCombinedArea.y)) {
// The block has moved, and so to be safe we need to repaint
// XXX We need to improve on this...
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, lineCombinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 6 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
if (!dirtyRect.IsEmpty()) {
Invalidate(aState.mPresContext, dirtyRect);
}
} else {
if (oldCombinedArea.width != lineCombinedArea.width) {
nsRect dirtyRect;
// Just damage the vertical strip that was either added or went
// away
dirtyRect.x = PR_MIN(oldCombinedArea.XMost(),
lineCombinedArea.XMost());
dirtyRect.y = lineCombinedArea.y;
dirtyRect.width = PR_MAX(oldCombinedArea.XMost(),
lineCombinedArea.XMost()) -
dirtyRect.x;
dirtyRect.height = PR_MAX(oldCombinedArea.height,
lineCombinedArea.height);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 7 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
if (!dirtyRect.IsEmpty()) {
Invalidate(aState.mPresContext, dirtyRect);
}
}
if (oldCombinedArea.height != lineCombinedArea.height) {
nsRect dirtyRect;
// Just damage the horizontal strip that was either added or went
// away
dirtyRect.x = lineCombinedArea.x;
dirtyRect.y = PR_MIN(oldCombinedArea.YMost(),
lineCombinedArea.YMost());
dirtyRect.width = PR_MAX(oldCombinedArea.width,
lineCombinedArea.width);
dirtyRect.height = PR_MAX(oldCombinedArea.YMost(),
lineCombinedArea.YMost()) -
dirtyRect.y;
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 8 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
if (!dirtyRect.IsEmpty()) {
Invalidate(aState.mPresContext, dirtyRect);
}
}
}
}
}
else {
aLine->SetLineWrapped(PR_FALSE);
// If we're supposed to update the maximum width, then we'll need to reflow
// the line with an unconstrained width (which will give us the new maximum
// width), then we'll reflow it again with the constrained width.
// We only do this if this is a beginning line, i.e., don't do this for
// lines associated with content that line wrapped (see ReflowDirtyLines()
// for details).
// XXX This approach doesn't work when floaters are involved in which case
// we'll either need to recover the floater state that applies to the
// unconstrained reflow or keep it around in a separate space manager...
PRBool isBeginningLine = aState.mCurrentLine == begin_lines() ||
!aState.mCurrentLine.prev()->IsLineWrapped();
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH) && isBeginningLine) {
nscoord oldY = aState.mY;
nsCollapsingMargin oldPrevBottomMargin(aState.mPrevBottomMargin);
PRBool oldUnconstrainedWidth = aState.GetFlag(BRS_UNCONSTRAINEDWIDTH);
// First reflow the line with an unconstrained width. When doing this
// we need to set the block reflow state's "mUnconstrainedWidth" variable
// to PR_TRUE so if we encounter a placeholder and then reflow its
// associated floater we don't end up resetting the line's right edge and
// have it think the width is unconstrained...
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, PR_TRUE);
ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea, PR_TRUE);
aState.mY = oldY;
aState.mPrevBottomMargin = oldPrevBottomMargin;
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, oldUnconstrainedWidth);
// Update the line's maximum width
aLine->mMaximumWidth = aLine->mBounds.XMost();
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
// Remove any floaters associated with the line from the space
// manager
aLine->RemoveFloatersFromSpaceManager(aState.mSpaceManager);
// Now reflow the line again this time without having it compute
// the maximum width or max-element-size.
// Note: we need to reset both member variables, because the inline
// code examines mComputeMaxElementSize and if there is a placeholder
// on this line the code to reflow the floater looks at both...
nscoord oldComputeMaxElementSize = aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE);
nscoord oldComputeMaximumWidth = aState.GetFlag(BRS_COMPUTEMAXWIDTH);
aState.SetFlag(BRS_COMPUTEMAXELEMENTSIZE, PR_FALSE);
aState.SetFlag(BRS_COMPUTEMAXWIDTH, PR_FALSE);
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea);
aState.SetFlag(BRS_COMPUTEMAXELEMENTSIZE, oldComputeMaxElementSize);
aState.SetFlag(BRS_COMPUTEMAXWIDTH, oldComputeMaximumWidth);
} else {
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea);
if (NS_SUCCEEDED(rv))
{
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH))
{
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
}
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE))
{
#ifdef NOISY_MAX_ELEMENT_SIZE
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaxElementWidth to %d\n",
this, aLine, aLine->mMaxElementWidth);
#endif
aState.UpdateMaxElementSize(nsSize(aLine->mMaxElementWidth, aLine->mBounds.height));
}
}
}
// We don't really know what changed in the line, so use the union
// of the old and new combined areas
// SEC: added "aLine->IsForceInvalidate()" for bug 45152
if (aDamageDirtyArea || aLine->IsForceInvalidate()) {
aLine->SetForceInvalidate(PR_FALSE); // doing the invalidate now, force flag to off
nsRect combinedArea;
aLine->GetCombinedArea(&combinedArea);
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, combinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate because %s is true (%d, %d, %d, %d)\n",
this, aDamageDirtyArea ? "aDamageDirtyArea" : "aLine->IsForceInvalidate",
dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
if (aLine->IsForceInvalidate())
printf(" dirty line is %p\n");
#endif
if (!dirtyRect.IsEmpty()) {
Invalidate(aState.mPresContext, dirtyRect);
}
}
}
return rv;
}
/**
* Pull frame from the next available location (one of our lines or
* one of our next-in-flows lines).
*/
nsresult
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
line_iterator aLine,
PRBool aDamageDeletedLines,
nsIFrame*& aFrameResult)
{
nsresult rv = NS_OK;
PRBool stopPulling;
aFrameResult = nsnull;
// First check our remaining lines
while (end_lines() != aLine.next()) {
rv = PullFrameFrom(aState, aLine, mLines, aLine.next(), PR_FALSE,
aDamageDeletedLines, aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
// Pull frames from the next-in-flow(s) until we can't
nsBlockFrame* nextInFlow = aState.mNextInFlow;
while (nsnull != nextInFlow) {
if (nextInFlow->mLines.empty()) {
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
aState.mNextInFlow = nextInFlow;
continue;
}
rv = PullFrameFrom(aState, aLine, nextInFlow->mLines,
nextInFlow->mLines.begin(), PR_TRUE,
aDamageDeletedLines, aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
return rv;
}
/**
* Try to pull a frame out of a line pointed at by aFromLine. If a frame
* is pulled then aPulled will be set to PR_TRUE. In addition, if
* aUpdateGeometricParent is set then the pulled frames geometric parent
* will be updated (e.g. when pulling from a next-in-flows line list).
*
* Note: pulling a frame from a line that is a place-holder frame
* doesn't automatically remove the corresponding floater from the
* line's floater array. This happens indirectly: either the line gets
* emptied (and destroyed) or the line gets reflowed (because we mark
* it dirty) and the code at the top of ReflowLine empties the
* array. So eventually, it will be removed, just not right away.
*/
nsresult
nsBlockFrame::PullFrameFrom(nsBlockReflowState& aState,
nsLineBox* aLine,
nsLineList& aFromContainer,
nsLineList::iterator aFromLine,
PRBool aUpdateGeometricParent,
PRBool aDamageDeletedLines,
nsIFrame*& aFrameResult,
PRBool& aStopPulling)
{
nsLineBox* fromLine = aFromLine;
NS_ABORT_IF_FALSE(fromLine, "bad line to pull from");
NS_ABORT_IF_FALSE(fromLine->GetChildCount(), "empty line");
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "empty line");
if (fromLine->IsBlock()) {
// If our line is not empty and the child in aFromLine is a block
// then we cannot pull up the frame into this line. In this case
// we stop pulling.
aStopPulling = PR_TRUE;
aFrameResult = nsnull;
}
else {
// Take frame from fromLine
nsIFrame* frame = fromLine->mFirstChild;
aLine->SetChildCount(aLine->GetChildCount() + 1);
PRInt32 fromLineChildCount = fromLine->GetChildCount();
if (0 != --fromLineChildCount) {
// Mark line dirty now that we pulled a child
fromLine->SetChildCount(fromLineChildCount);
fromLine->MarkDirty();
frame->GetNextSibling(&fromLine->mFirstChild);
}
else {
// Free up the fromLine now that it's empty
// Its bounds might need to be redrawn, though.
if (aDamageDeletedLines && !fromLine->mBounds.IsEmpty()) {
Invalidate(aState.mPresContext, fromLine->mBounds);
}
if (aFromLine.next() != end_lines())
aFromLine.next()->MarkPreviousMarginDirty();
aFromContainer.erase(aFromLine);
aState.FreeLineBox(fromLine);
}
// Change geometric parents
if (aUpdateGeometricParent) {
// Before we set the new parent frame get the current parent
nsIFrame* oldParentFrame;
frame->GetParent(&oldParentFrame);
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
NS_ASSERTION(oldParentFrame != this, "unexpected parent frame");
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, oldParentFrame, this);
// The frame is being pulled from a next-in-flow; therefore we
// need to add it to our sibling list.
if (nsnull != aState.mPrevChild) {
aState.mPrevChild->SetNextSibling(frame);
}
frame->SetNextSibling(nsnull);
}
// Stop pulling because we found a frame to pull
aStopPulling = PR_TRUE;
aFrameResult = frame;
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
}
return NS_OK;
}
static void
PlaceFrameView(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIView* view;
aFrame->GetView(aPresContext, &view);
if (view)
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aFrame, view, nsnull);
nsContainerFrame::PositionChildViews(aPresContext, aFrame);
}
void
nsBlockFrame::SlideLine(nsBlockReflowState& aState,
nsLineBox* aLine, nscoord aDY)
{
NS_PRECONDITION(aDY != 0, "why slide a line nowhere?");
PRBool doInvalidate = !aLine->mBounds.IsEmpty();
if (doInvalidate)
Invalidate(aState.mPresContext, aLine->mBounds);
// Adjust line state
aLine->SlideBy(aDY);
if (doInvalidate)
Invalidate(aState.mPresContext, aLine->mBounds);
// Adjust the frames in the line
nsIFrame* kid = aLine->mFirstChild;
if (!kid) {
return;
}
if (aLine->IsBlock()) {
nsRect r;
kid->GetRect(r);
if (aDY) {
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**) &bf);
if (NS_SUCCEEDED(rv)) {
// Translate spacemanager to the child blocks upper-left corner
// so that when it places its floaters (which are relative to
// it) the right coordinates are used. Note that we have already
// been translated by our border+padding so factor that in to
// get the right translation.
const nsMargin& bp = aState.BorderPadding();
nscoord dx = r.x - bp.left;
nscoord dy = r.y - bp.top;
aState.mSpaceManager->Translate(dx, dy);
bf->UpdateSpaceManager(aState.mPresContext, aState.mSpaceManager);
aState.mSpaceManager->Translate(-dx, -dy);
}
}
else {
// Adjust the Y coordinate of the frames in the line.
// Note: we need to re-position views even if aDY is 0, because
// one of our parent frames may have moved and so the view's position
// relative to its parent may have changed
nsRect r;
PRInt32 n = aLine->GetChildCount();
while (--n >= 0) {
if (aDY) {
kid->GetRect(r);
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
kid->GetNextSibling(&kid);
}
}
}
nsresult
nsBlockFrame::UpdateSpaceManager(nsIPresContext* aPresContext,
nsSpaceManager* aSpaceManager)
{
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
// Place the floaters in the spacemanager
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
aSpaceManager->AddRectRegion(floater, fc->mRegion);
#ifdef NOISY_SPACEMANAGER
nscoord tx, ty;
aSpaceManager->GetTranslation(tx, ty);
nsFrame::ListTag(stdout, this);
printf(": UpdateSpaceManager: AddRectRegion: txy=%d,%d {%d,%d,%d,%d}\n",
tx, ty,
fc->mRegion.x, fc->mRegion.y,
fc->mRegion.width, fc->mRegion.height);
#endif
fc = fc->Next();
}
}
// Tell kids about the move too
if (line->mFirstChild && line->IsBlock()) {
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = line->mFirstChild->QueryInterface(kBlockFrameCID,
NS_REINTERPRET_CAST(void**, &bf));
if (NS_SUCCEEDED(rv)) {
nsPoint origin;
bf->GetOrigin(origin);
// Translate spacemanager to the child blocks upper-left
// corner so that when it places its floaters (which are
// relative to it) the right coordinates are used.
aSpaceManager->Translate(origin.x, origin.y);
bf->UpdateSpaceManager(aPresContext, aSpaceManager);
aSpaceManager->Translate(-origin.x, -origin.y);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
PRInt32 aHint)
{
nsresult rv = nsBlockFrameSuper::AttributeChanged(aPresContext, aChild,
aNameSpaceID, aAttribute, aModType, aHint);
if (NS_FAILED(rv)) {
return rv;
}
if (nsHTMLAtoms::start == aAttribute) {
// XXX Not sure if this is necessary anymore
RenumberLists(aPresContext);
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIReflowCommand* reflowCmd;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ContentChanged,
nsnull,
aAttribute);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
else if (nsHTMLAtoms::value == aAttribute) {
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
if (NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) {
nsIFrame* nextAncestor = mParent;
nsBlockFrame* blockParent = nsnull;
// Search for the closest ancestor that's a block frame. We
// make the assumption that all related list items share a
// common block parent.
// XXXldb I think that's a bad assumption.
while (nextAncestor) {
if (NS_OK == nextAncestor->QueryInterface(kBlockFrameCID,
(void**)&blockParent)) {
break;
}
nextAncestor->GetParent(&nextAncestor);
}
// Tell the enclosing block frame to renumber list items within
// itself
if (nsnull != blockParent) {
// XXX Not sure if this is necessary anymore
blockParent->RenumberLists(aPresContext);
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIReflowCommand* reflowCmd;
rv = NS_NewHTMLReflowCommand(&reflowCmd, blockParent,
nsIReflowCommand::ContentChanged,
nsnull,
aAttribute);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
}
}
return rv;
}
inline PRBool
IsBorderZero(nsStyleUnit aUnit, nsStyleCoord &aCoord)
{
return ((aUnit == eStyleUnit_Coord && aCoord.GetCoordValue() == 0));
}
inline PRBool
IsPaddingZero(nsStyleUnit aUnit, nsStyleCoord &aCoord)
{
return (aUnit == eStyleUnit_Null ||
(aUnit == eStyleUnit_Coord && aCoord.GetCoordValue() == 0) ||
(aUnit == eStyleUnit_Percent && aCoord.GetPercentValue() == 0.0));
}
inline PRBool
IsMarginZero(nsStyleUnit aUnit, nsStyleCoord &aCoord)
{
return (aUnit == eStyleUnit_Null ||
aUnit == eStyleUnit_Auto ||
(aUnit == eStyleUnit_Coord && aCoord.GetCoordValue() == 0) ||
(aUnit == eStyleUnit_Percent && aCoord.GetPercentValue() == 0.0));
}
NS_IMETHODIMP
nsBlockFrame::IsEmpty(PRBool aIsQuirkMode, PRBool aIsPre, PRBool *aResult)
{
// XXXldb In hindsight, I'm not sure why I made this check the margin,
// but it seems to work right and I'm a little hesitant to change it.
const nsStyleMargin* margin = NS_STATIC_CAST(const nsStyleMargin*,
mStyleContext->GetStyleData(eStyleStruct_Margin));
const nsStyleBorder* border = NS_STATIC_CAST(const nsStyleBorder*,
mStyleContext->GetStyleData(eStyleStruct_Border));
const nsStylePadding* padding = NS_STATIC_CAST(const nsStylePadding*,
mStyleContext->GetStyleData(eStyleStruct_Padding));
nsStyleCoord coord;
if ((border->IsBorderSideVisible(NS_SIDE_TOP) &&
!IsBorderZero(border->mBorder.GetTopUnit(),
border->mBorder.GetTop(coord))) ||
(border->IsBorderSideVisible(NS_SIDE_BOTTOM) &&
!IsBorderZero(border->mBorder.GetTopUnit(),
border->mBorder.GetTop(coord))) ||
!IsPaddingZero(padding->mPadding.GetTopUnit(),
padding->mPadding.GetTop(coord)) ||
!IsPaddingZero(padding->mPadding.GetBottomUnit(),
padding->mPadding.GetBottom(coord)) ||
!IsMarginZero(margin->mMargin.GetTopUnit(),
margin->mMargin.GetTop(coord)) ||
!IsMarginZero(margin->mMargin.GetBottomUnit(),
margin->mMargin.GetBottom(coord))) {
*aResult = PR_FALSE;
return NS_OK;
}
const nsStyleText* styleText = NS_STATIC_CAST(const nsStyleText*,
mStyleContext->GetStyleData(eStyleStruct_Text));
PRBool isPre =
((NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace));
*aResult = PR_TRUE;
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line)
{
line->IsEmpty(aIsQuirkMode, isPre, aResult);
if (! *aResult)
break;
}
return NS_OK;
}
PRBool
nsBlockFrame::ShouldApplyTopMargin(nsBlockReflowState& aState,
nsLineBox* aLine)
{
if (aState.GetFlag(BRS_APPLYTOPMARGIN)) {
// Apply short-circuit check to avoid searching the line list
return PR_TRUE;
}
if (!aState.IsAdjacentWithTop()) {
// If we aren't at the top Y coordinate then something of non-zero
// height must have been placed. Therefore the childs top-margin
// applies.
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
return PR_TRUE;
}
// Determine if this line is "essentially" the first line
for (line_iterator line = begin_lines();
line != aLine;
++line) {
if (line->IsBlock()) {
// A line which preceeds aLine contains a block; therefore the
// top margin applies.
// XXXldb this is wrong if that block is empty and the margin
// is collapsed outside the parent
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
return PR_TRUE;
}
// No need to apply the top margin if the line has floaters. We
// should collapse anyway (bug 44419)
}
// The line being reflowed is "essentially" the first line in the
// block. Therefore its top-margin will be collapsed by the
// generational collapsing logic with its parent (us).
return PR_FALSE;
}
nsIFrame*
nsBlockFrame::GetTopBlockChild()
{
nsIFrame* firstChild = mLines.empty() ? nsnull : mLines.front()->mFirstChild;
if (firstChild) {
if (mLines.front()->IsBlock()) {
// Winner
return firstChild;
}
// If the first line is not a block line then the second line must
// be a block line otherwise the top child can't be a block.
line_iterator next = begin_lines();
++next;
if ((next == end_lines()) || !next->IsBlock()) {
// There is no line after the first line or its not a block so
// don't bother trying to skip over the first line.
return nsnull;
}
// The only time we can skip over the first line and pretend its
// not there is if the line contains only compressed
// whitespace. If white-space is significant to this frame then we
// can't skip over the line.
const nsStyleText* styleText;
GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) styleText);
if ((NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace)) {
// Whitespace is significant
return nsnull;
}
// See if each frame is a text frame that contains nothing but
// whitespace.
PRInt32 n = mLines.front()->GetChildCount();
while (--n >= 0) {
nsIContent* content;
nsresult rv = firstChild->GetContent(&content);
if (NS_FAILED(rv) || !content) {
return nsnull;
}
if (!content->IsContentOfType(nsIContent::eTEXT)) {
NS_RELEASE(content);
return nsnull;
}
nsITextContent* tc;
rv = content->QueryInterface(kITextContentIID, (void**) &tc);
NS_RELEASE(content);
if (NS_FAILED(rv) || (nsnull == tc)) {
return nsnull;
}
PRBool isws = PR_FALSE;
tc->IsOnlyWhitespace(&isws);
NS_RELEASE(tc);
if (!isws) {
return nsnull;
}
firstChild->GetNextSibling(&firstChild);
}
// If we make it to this point then every frame on the first line
// was compressible white-space. Since we already know that the
// second line contains a block, that block is the
// top-block-child.
return next->mFirstChild;
}
return nsnull;
}
nsresult
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
line_iterator aLine,
PRBool* aKeepReflowGoing)
{
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
nsresult rv = NS_OK;
nsIFrame* frame = aLine->mFirstChild;
// Prepare the block reflow engine
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE),
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
brc.SetNextRCFrame(aState.mNextRCFrame);
// See if we should apply the top margin. If the block frame being
// reflowed is a continuation (non-null prev-in-flow) then we don't
// apply its top margin because its not significant. Otherwise, dig
// deeper.
PRBool applyTopMargin = PR_FALSE;
nsIFrame* framePrevInFlow;
frame->GetPrevInFlow(&framePrevInFlow);
if (nsnull == framePrevInFlow) {
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
}
// Clear past floaters before the block if the clear style is not none
PRUint8 breakType = display->mBreakType;
aLine->SetBreakType(breakType);
if (NS_STYLE_CLEAR_NONE != breakType) {
PRBool alsoApplyTopMargin = aState.ClearPastFloaters(breakType);
if (alsoApplyTopMargin) {
applyTopMargin = PR_TRUE;
}
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": y=%d child ", aState.mY);
ListTag(stdout, frame);
printf(" has clear of %d => %s, mPrevBottomMargin=%d\n",
breakType,
applyTopMargin ? "applyTopMargin" : "nope",
aState.mPrevBottomMargin);
#endif
}
nscoord topMargin = 0;
if (applyTopMargin) {
// Precompute the blocks top margin value so that we can get the
// correct available space (there might be a floater that's
// already been placed below the aState.mPrevBottomMargin
// Setup a reflowState to get the style computed margin-top value
// The availSpace here is irrelevant to our needs - all we want
// out if this setup is the margin-top value which doesn't depend
// on the childs available space.
nsSize availSpace(aState.mContentArea.width, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
frame, availSpace);
// Now compute the collapsed margin-top value into aState.mPrevBottomMargin
nsCollapsingMargin oldPrevBottomMargin = aState.mPrevBottomMargin;
nsBlockReflowContext::ComputeCollapsedTopMargin(aState.mPresContext,
reflowState,
aState.mPrevBottomMargin);
topMargin = aState.mPrevBottomMargin.get();
aState.mPrevBottomMargin = oldPrevBottomMargin; // perhaps not needed
// Temporarily advance the running Y value so that the
// GetAvailableSpace method will return the right available
// space. This undone as soon as the margin is computed.
aState.mY += topMargin;
}
// Compute the available space for the block
aState.GetAvailableSpace();
#ifdef REALLY_NOISY_REFLOW
printf("setting line %p isImpacted to %s\n", aLine, aState.IsImpactedByFloater()?"true":"false");
#endif
PRBool isImpacted = aState.IsImpactedByFloater() ? PR_TRUE : PR_FALSE;
aLine->SetLineIsImpactedByFloater(isImpacted);
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
frame->IsSplittable(splitType);
nsRect availSpace;
aState.ComputeBlockAvailSpace(frame, splitType, display, availSpace);
// Now put the Y coordinate back and flow the block letting the
// block reflow context compute the same top margin value we just
// computed (sigh).
if (topMargin) {
aState.mY -= topMargin;
availSpace.y -= topMargin;
if (NS_UNCONSTRAINEDSIZE != availSpace.height) {
availSpace.height += topMargin;
}
}
// Reflow the block into the available space
nsReflowStatus frameReflowStatus=NS_FRAME_COMPLETE;
nsMargin computedOffsets;
rv = brc.ReflowBlock(frame, availSpace,
applyTopMargin, aState.mPrevBottomMargin,
aState.IsAdjacentWithTop(),
computedOffsets, frameReflowStatus);
if (brc.BlockShouldInvalidateItself() && !mRect.IsEmpty()) {
Invalidate(aState.mPresContext, mRect);
}
if (frame == aState.mNextRCFrame) {
// NULL out mNextRCFrame so if we reflow it again we don't think it's still
// an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
aState.mPrevChild = frame;
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_TRUE, frameReflowStatus);
#endif
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// None of the child block fits.
PushLines(aState, aLine.prev());
*aKeepReflowGoing = PR_FALSE;
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
else {
// Note: line-break-after a block is a nop
// Try to place the child block
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
nsCollapsingMargin collapsedBottomMargin;
nsRect combinedArea(0,0,0,0);
*aKeepReflowGoing = brc.PlaceBlock(isAdjacentWithTop, computedOffsets,
collapsedBottomMargin,
aLine->mBounds, combinedArea);
aLine->SetCarriedOutBottomMargin(collapsedBottomMargin);
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Mark the line as dirty so once we known the final shrink wrap width
// we can reflow the block to the correct size
// XXX We don't always need to do this...
aLine->MarkDirty();
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
}
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) || aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Add the right margin to the line's bounds. That way it will be
// taken into account when we compute our shrink wrap size.
nscoord marginRight = brc.GetMargin().right;
if (marginRight != NS_UNCONSTRAINEDSIZE) {
aLine->mBounds.width += marginRight;
}
}
aLine->SetCombinedArea(combinedArea);
if (*aKeepReflowGoing) {
// Some of the child block fit
// Advance to new Y position
nscoord newY = aLine->mBounds.YMost();
aState.mY = newY;
// Continue the block frame now if it didn't completely fit in
// the available space.
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, frame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Push continuation to a new line, but only if we actually
// made one.
if (madeContinuation) {
frame->GetNextSibling(&frame);
nsLineBox* line = aState.NewLineBox(frame, 1, PR_TRUE);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
mLines.after_insert(aLine, line);
// Do not count the continuation child on the line it used
// to be on
aLine->SetChildCount(aLine->GetChildCount() - 1);
}
// Advance to next line since some of the block fit. That way
// only the following lines will be pushed.
PushLines(aState, aLine);
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
*aKeepReflowGoing = PR_FALSE;
// The bottom margin for a block is only applied on the last
// flow block. Since we just continued the child block frame,
// we know that line->mFirstChild is not the last flow block
// therefore zero out the running margin value.
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": reflow incomplete, frame=");
nsFrame::ListTag(stdout, frame);
printf(" prevBottomMargin=%d, setting to zero\n",
aState.mPrevBottomMargin);
#endif
aState.mPrevBottomMargin.Zero();
}
else {
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": reflow complete for ");
nsFrame::ListTag(stdout, frame);
printf(" prevBottomMargin=%d collapsedBottomMargin=%d\n",
aState.mPrevBottomMargin, collapsedBottomMargin.get());
#endif
aState.mPrevBottomMargin = collapsedBottomMargin;
}
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": frame=");
nsFrame::ListTag(stdout, frame);
printf(" carriedOutBottomMargin=%d collapsedBottomMargin=%d => %d\n",
brc.GetCarriedOutBottomMargin(), collapsedBottomMargin.get(),
aState.mPrevBottomMargin);
#endif
// Post-process the "line"
nsSize maxElementSize(0, 0);
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
maxElementSize = brc.GetMaxElementSize();
if (aState.IsImpactedByFloater() &&
(NS_FRAME_SPLITTABLE_NON_RECTANGULAR != splitType)) {
// Add in floater impacts to the lines max-element-size, but
// only if the block element isn't one of us (otherwise the
// floater impacts will be counted twice).
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
}
}
// If we asked the block to update its maximum width, then record the
// updated value in the line, and update the current maximum width
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
aLine->mMaximumWidth = brc.GetMaximumWidth();
// need to add in margin on block's reported max width (see bug 35964)
const nsMargin& margin = brc.GetMargin();
aLine->mMaximumWidth += margin.left + margin.right;
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowBlockFrame parent block %p line %p aLine->mMaximumWidth set to brc.GetMaximumWidth %d, updating aState.mMaximumWidth\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
}
PostPlaceLine(aState, aLine, maxElementSize);
// If the block frame that we just reflowed happens to be our
// first block, then its computed ascent is ours
if (frame == GetTopBlockChild()) {
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
mAscent = metrics.ascent;
}
// Place the "marker" (bullet) frame.
//
// According to the CSS2 spec, section 12.6.1, the "marker" box
// participates in the height calculation of the list-item box's
// first line box.
//
// There are exactly two places a bullet can be placed: near the
// first or second line. Its only placed on the second line in a
// rare case: an empty first line followed by a second line that
// contains a block (example: <LI>\n<P>... ). This is where
// the second case can happen.
if (mBullet && HaveOutsideBullet() &&
((aLine == mLines.front()) ||
((0 == mLines.front()->mBounds.height) &&
(aLine == begin_lines().next())))) {
// Reflow the bullet
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// For bullets that are placed next to a child block, there will
// be no correct ascent value. Therefore, make one up...
// XXXldb We should be able to get the correct ascent value now.
nscoord ascent = 0;
const nsStyleFont* font;
frame->GetStyleData(eStyleStruct_Font,
(const nsStyleStruct*&) font);
nsIRenderingContext& rc = *aState.mReflowState.rendContext;
rc.SetFont(font->mFont);
nsIFontMetrics* fm;
rv = rc.GetFontMetrics(fm);
if (NS_SUCCEEDED(rv) && (nsnull != fm)) {
fm->GetMaxAscent(ascent);
NS_RELEASE(fm);
}
rv = NS_OK;
// Tall bullets won't look particularly nice here...
nsRect bbox;
mBullet->GetRect(bbox);
nscoord bulletTopMargin = applyTopMargin
? collapsedBottomMargin.get()
: 0;
bbox.y = aState.BorderPadding().top + ascent -
metrics.ascent + bulletTopMargin;
mBullet->SetRect(aState.mPresContext, bbox);
}
}
else {
// None of the block fits. Determine the correct reflow status.
if (aLine == mLines.front()) {
// If it's our very first line then we need to be pushed to
// our parents next-in-flow. Therefore, return break-before
// status for our reflow status.
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
}
else {
// Push the line that didn't fit and any lines that follow it
// to our next-in-flow.
PushLines(aState, aLine.prev());
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
}
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return rv;
}
#define LINE_REFLOW_OK 0
#define LINE_REFLOW_STOP 1
#define LINE_REFLOW_REDO 2
nsresult
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRBool aDamageDirtyArea,
PRBool aUpdateMaximumWidth)
{
nsresult rv = NS_OK;
*aKeepReflowGoing = PR_TRUE;
#ifdef DEBUG
PRInt32 spins = 0;
#endif
PRUint8 lineReflowStatus = LINE_REFLOW_REDO;
while (LINE_REFLOW_REDO == lineReflowStatus) {
// Prevent overflowing limited thread stacks by creating
// nsLineLayout from the heap when the frame tree depth gets
// large.
if (aState.mReflowState.mReflowDepth > 30) {//XXX layout-tune.h?
rv = DoReflowInlineFramesMalloc(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
}
else {
rv = DoReflowInlineFramesAuto(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
}
if (NS_FAILED(rv)) {
break;
}
#ifdef DEBUG
spins++;
if (1000 == spins) {
ListTag(stdout);
printf(": yikes! spinning on a line over 1000 times!\n");
NS_ABORT();
}
#endif
}
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesMalloc(nsBlockReflowState& aState,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
// XXXldb Using the PresShell arena here would be nice.
nsLineLayout* ll = new nsLineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE));
if (!ll) {
return NS_ERROR_OUT_OF_MEMORY;
}
ll->Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
nsresult rv = DoReflowInlineFrames(aState, *ll, aLine, aKeepReflowGoing,
aLineReflowStatus, aUpdateMaximumWidth, aDamageDirtyArea);
ll->EndLineReflow();
delete ll;
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesAuto(nsBlockReflowState& aState,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
nsLineLayout lineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE));
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
nsresult rv = DoReflowInlineFrames(aState, lineLayout, aLine,
aKeepReflowGoing, aLineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
lineLayout.EndLineReflow();
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFrames(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
// Forget all of the floaters on the line
aLine->FreeFloaters(aState.mFloaterCacheFreeList);
aState.mFloaterCombinedArea.SetRect(0, 0, 0, 0);
aState.mRightFloaterCombinedArea.SetRect(0, 0, 0, 0);
// Setup initial coordinate system for reflowing the inline frames
// into. Apply a previous block frame's bottom margin first.
aState.mY += aState.mPrevBottomMargin.get();
aState.GetAvailableSpace();
PRBool impactedByFloaters = aState.IsImpactedByFloater() ? PR_TRUE : PR_FALSE;
aLine->SetLineIsImpactedByFloater(impactedByFloaters);
#ifdef REALLY_NOISY_REFLOW
printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
this, impactedByFloaters);
#endif
const nsMargin& borderPadding = aState.BorderPadding();
nscoord x = aState.mAvailSpaceRect.x + borderPadding.left;
nscoord availWidth = aState.mAvailSpaceRect.width;
nscoord availHeight;
if (aState.GetFlag(BRS_UNCONSTRAINEDHEIGHT)) {
availHeight = NS_UNCONSTRAINEDSIZE;
}
else {
/* XXX get the height right! */
availHeight = aState.mAvailSpaceRect.height;
}
if (aUpdateMaximumWidth) {
availWidth = NS_UNCONSTRAINEDSIZE;
}
#ifdef IBMBIDI
else {
nscoord rightEdge = aState.mReflowState.mRightEdge;
if ( (rightEdge != NS_UNCONSTRAINEDSIZE)
&& (availWidth < rightEdge) ) {
availWidth = rightEdge;
}
}
#endif // IBMBIDI
aLineLayout.BeginLineReflow(x, aState.mY,
availWidth, availHeight,
impactedByFloaters,
PR_FALSE /*XXX isTopOfPage*/);
// XXX Unfortunately we need to know this before reflowing the first
// inline frame in the line. FIX ME.
if ((0 == aLineLayout.GetLineNumber()) &&
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
aLineLayout.SetFirstLetterStyleOK(PR_TRUE);
}
// Reflow the frames that are already on the line first
nsresult rv = NS_OK;
PRUint8 lineReflowStatus = LINE_REFLOW_OK;
PRInt32 i;
nsIFrame* frame = aLine->mFirstChild;
aLine->SetHasPercentageChild(PR_FALSE); // To be set by ReflowInlineFrame below
// need to repeatedly call GetChildCount here, because the child
// count can change during the loop!
for (i = 0; i < aLine->GetChildCount(); i++) {
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
&lineReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
if (LINE_REFLOW_OK != lineReflowStatus) {
// It is possible that one or more of next lines are empty
// (because of DeleteChildsNextInFlow). If so, delete them now
// in case we are finished.
++aLine;
while ((aLine != end_lines()) && (0 == aLine->GetChildCount())) {
// XXX Is this still necessary now that DeleteChildsNextInFlow
// uses DoRemoveFrame?
nsLineBox *toremove = aLine;
aLine = mLines.erase(aLine);
NS_ASSERTION(nsnull == toremove->mFirstChild, "bad empty line");
aState.FreeLineBox(toremove);
}
--aLine;
break;
}
frame->GetNextSibling(&frame);
}
// Pull frames and reflow them until we can't
while (LINE_REFLOW_OK == lineReflowStatus) {
rv = PullFrame(aState, aLine, aDamageDirtyArea, frame);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull == frame) {
break;
}
while (LINE_REFLOW_OK == lineReflowStatus) {
PRInt32 oldCount = aLine->GetChildCount();
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
&lineReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
if (aLine->GetChildCount() != oldCount) {
// We just created a continuation for aFrame AND its going
// to end up on this line (e.g. :first-letter
// situation). Therefore we have to loop here before trying
// to pull another frame.
frame->GetNextSibling(&frame);
}
else {
break;
}
}
}
if (LINE_REFLOW_REDO == lineReflowStatus) {
// This happens only when we have a line that is impacted by
// floaters and the first element in the line doesn't fit with
// the floaters.
//
// What we do is to advance past the first floater we find and
// then reflow the line all over again.
NS_ASSERTION(aState.IsImpactedByFloater(),
"redo line on totally empty line");
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
"unconstrained height on totally empty line");
aState.mY += aState.mAvailSpaceRect.height;
// XXX: a small optimization can be done here when paginating:
// if the new Y coordinate is past the end of the block then
// push the line and return now instead of later on after we are
// past the floater.
}
else {
// If we are propogating out a break-before status then there is
// no point in placing the line.
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
rv = PlaceLine(aState, aLineLayout, aLine, aKeepReflowGoing, aUpdateMaximumWidth);
}
}
*aLineReflowStatus = lineReflowStatus;
return rv;
}
/**
* Reflow an inline frame. The reflow status is mapped from the frames
* reflow status to the lines reflow status (not to our reflow status).
* The line reflow status is simple: PR_TRUE means keep placing frames
* on the line; PR_FALSE means don't (the line is done). If the line
* has some sort of breaking affect then aLine's break-type will be set
* to something other than NS_STYLE_CLEAR_NONE.
*/
nsresult
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
line_iterator aLine,
nsIFrame* aFrame,
PRUint8* aLineReflowStatus)
{
NS_ENSURE_ARG_POINTER(aFrame);
*aLineReflowStatus = LINE_REFLOW_OK;
// If it's currently ok to be reflowing in first-letter style then
// we must be about to reflow a frame that has first-letter style.
PRBool reflowingFirstLetter = aLineLayout.GetFirstLetterStyleOK();
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": reflowing ");
nsFrame::ListTag(stdout, aFrame);
printf(" reflowingFirstLetter=%s\n", reflowingFirstLetter ? "on" : "off");
#endif
// Remember if we have a percentage aware child on this line
if (IsPercentageAwareChild(aFrame)) {
aLine->SetHasPercentageChild(PR_TRUE);
}
// Reflow the inline frame
nsReflowStatus frameReflowStatus;
PRBool pushedFrame;
nsresult rv = aLineLayout.ReflowFrame(aFrame, &aState.mNextRCFrame,
frameReflowStatus, nsnull, pushedFrame);
if (aFrame == aState.mNextRCFrame) {
// NULL out mNextRCFrame so if we reflow it again we don't think it's still
// an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
#ifdef REALLY_NOISY_REFLOW_CHILD
nsFrame::ListTag(stdout, aFrame);
printf(": status=%x\n", frameReflowStatus);
#endif
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_FALSE, frameReflowStatus);
#endif
// Send post-reflow notification
aState.mPrevChild = aFrame;
/* XXX
This is where we need to add logic to handle some odd behavior.
For one thing, we should usually place at least one thing next
to a left floater, even when that floater takes up all the width on a line.
see bug 22496
*/
// Process the child frames reflow status. There are 5 cases:
// complete, not-complete, break-before, break-after-complete,
// break-after-not-complete. There are two situations: we are a
// block or we are an inline. This makes a total of 10 cases
// (fortunately, there is some overlap).
aLine->SetBreakType(NS_STYLE_CLEAR_NONE);
if (NS_INLINE_IS_BREAK(frameReflowStatus)) {
// Always abort the line reflow (because a line break is the
// minimal amount of break we do).
*aLineReflowStatus = LINE_REFLOW_STOP;
// XXX what should aLine's break-type be set to in all these cases?
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
NS_ASSERTION(breakType != NS_STYLE_CLEAR_NONE, "bad break type");
NS_ASSERTION(NS_STYLE_CLEAR_PAGE != breakType, "no page breaks yet");
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// Break-before cases.
if (aFrame == aLine->mFirstChild) {
// If we break before the first frame on the line then we must
// be trying to place content where theres no room (e.g. on a
// line with wide floaters). Inform the caller to reflow the
// line after skipping past a floater.
*aLineReflowStatus = LINE_REFLOW_REDO;
}
else {
// It's not the first child on this line so go ahead and split
// the line. We will see the frame again on the next-line.
rv = SplitLine(aState, aLineLayout, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// If we're splitting the line because the frame didn't fit and it
// was pushed, then mark the line as having word wrapped. We need to
// know that if we're shrink wrapping our width
if (pushedFrame) {
aLine->SetLineWrapped(PR_TRUE);
}
}
}
else {
// Break-after cases
if (breakType == NS_STYLE_CLEAR_LINE) {
if (!aLineLayout.GetLineEndsInBR()) {
breakType = NS_STYLE_CLEAR_NONE;
}
}
aLine->SetBreakType(breakType);
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
}
// Split line, but after the frame just reflowed
nsIFrame* nextFrame;
aFrame->GetNextSibling(&nextFrame);
rv = SplitLine(aState, aLineLayout, aLine, nextFrame);
if (NS_FAILED(rv)) {
return rv;
}
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine.next();
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Frame is not-complete, no special breaking status
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
// If we are reflowing the first letter frame then don't split the
// line and don't stop the line reflow...
PRBool splitLine = !reflowingFirstLetter;
if (reflowingFirstLetter) {
nsCOMPtr<nsIAtom> frameType;
aFrame->GetFrameType(getter_AddRefs(frameType));
if ((nsLayoutAtoms::inlineFrame == frameType.get()) ||
(nsLayoutAtoms::lineFrame == frameType.get())) {
splitLine = PR_TRUE;
}
}
if (splitLine) {
// Split line after the current frame
*aLineReflowStatus = LINE_REFLOW_STOP;
aFrame->GetNextSibling(&aFrame);
rv = SplitLine(aState, aLineLayout, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine.next();
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
return NS_OK;
}
/**
* Create a continuation, if necessary, for aFrame. Place it on the
* same line that aFrame is on. Set aMadeNewFrame to PR_TRUE if a
* new frame is created.
*/
nsresult
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame,
PRBool& aMadeNewFrame)
{
aMadeNewFrame = PR_FALSE;
nsresult rv;
nsIFrame* nextInFlow;
rv = CreateNextInFlow(aState.mPresContext, this, aFrame, nextInFlow);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull != nextInFlow) {
aMadeNewFrame = PR_TRUE;
aLine->SetChildCount(aLine->GetChildCount() + 1);
}
#ifdef DEBUG
VerifyLines(PR_FALSE);
#endif
return rv;
}
nsresult
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
line_iterator aLine,
nsIFrame* aFrame)
{
NS_ABORT_IF_FALSE(aLine->IsInline(), "illegal SplitLine on block line");
PRInt32 pushCount = aLine->GetChildCount() - aLineLayout.GetCurrentSpanCount();
NS_ABORT_IF_FALSE(pushCount >= 0, "bad push count");
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("split line: from line=%p pushCount=%d aFrame=",
NS_STATIC_CAST(void*, aLine.get()), pushCount);
if (aFrame) {
nsFrame::ListTag(stdout, aFrame);
}
else {
printf("(null)");
}
printf("\n");
if (gReallyNoisyReflow) {
aLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
}
}
#endif
if (0 != pushCount) {
NS_ABORT_IF_FALSE(aLine->GetChildCount() > pushCount, "bad push");
NS_ABORT_IF_FALSE(nsnull != aFrame, "whoops");
// Put frames being split out into their own line
nsLineBox* newLine = aState.NewLineBox(aFrame, pushCount, PR_FALSE);
if (!newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
mLines.after_insert(aLine, newLine);
aLine->SetChildCount(aLine->GetChildCount() - pushCount);
#ifdef DEBUG
if (gReallyNoisyReflow) {
newLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
}
#endif
// Let line layout know that some frames are no longer part of its
// state.
aLineLayout.SplitLineTo(aLine->GetChildCount());
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
}
return NS_OK;
}
PRBool
nsBlockFrame::ShouldJustifyLine(nsBlockReflowState& aState,
line_iterator aLine)
{
while (++aLine != end_lines()) {
// There is another line
if (0 != aLine->GetChildCount()) {
// If the next line is a block line then we must not justify
// this line because it means that this line is the last in a
// group of inline lines.
return !aLine->IsBlock();
}
// The next line is empty, try the next one
}
// XXX Not sure about this part
// Try our next-in-flows lines to answer the question
nsBlockFrame* nextInFlow = (nsBlockFrame*) mNextInFlow;
while (nsnull != nextInFlow) {
for (line_iterator line = nextInFlow->begin_lines(),
line_end = nextInFlow->end_lines();
line != line_end;
++line)
{
if (0 != line->GetChildCount())
return !line->IsBlock();
}
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
}
// This is the last line - so don't allow justification
return PR_FALSE;
}
nsresult
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
line_iterator aLine,
PRBool* aKeepReflowGoing,
PRBool aUpdateMaximumWidth)
{
nsresult rv = NS_OK;
// Trim extra white-space from the line before placing the frames
aLineLayout.TrimTrailingWhiteSpace();
// Vertically align the frames on this line.
//
// According to the CSS2 spec, section 12.6.1, the "marker" box
// participates in the height calculation of the list-item box's
// first line box.
//
// There are exactly two places a bullet can be placed: near the
// first or second line. Its only placed on the second line in a
// rare case: an empty first line followed by a second line that
// contains a block (example: <LI>\n<P>... ).
//
// For this code, only the first case is possible because this
// method is used for placing a line of inline frames. If the rare
// case is happening then the worst that will happen is that the
// bullet frame will be reflowed twice.
PRBool addedBullet = PR_FALSE;
if (mBullet && HaveOutsideBullet() && (aLine == mLines.front()) &&
(!aLineLayout.IsZeroHeight() || (aLine == mLines.back()))) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
aLineLayout.AddBulletFrame(mBullet, metrics);
addedBullet = PR_TRUE;
}
nsSize maxElementSize;
nscoord lineAscent;
aLineLayout.VerticalAlignLine(aLine, maxElementSize, lineAscent);
// Our ascent is the ascent of our first line
if (aLine == mLines.front()) {
mAscent = lineAscent;
}
// See if we're shrink wrapping the width
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// When determining the line's width we also need to include any
// right floaters that impact us. This represents the shrink wrap
// width of the line
if (aState.IsImpactedByFloater() && !aLine->IsLineWrapped()) {
NS_ASSERTION(aState.mContentArea.width >= aState.mAvailSpaceRect.XMost(), "bad state");
aLine->mBounds.width += aState.mContentArea.width - aState.mAvailSpaceRect.XMost();
}
}
#ifdef DEBUG
{
static nscoord lastHeight = 0;
if (CRAZY_HEIGHT(aLine->mBounds.y)) {
lastHeight = aLine->mBounds.y;
if (abs(aLine->mBounds.y - lastHeight) > CRAZY_H/10) {
nsFrame::ListTag(stdout);
printf(": line=%p y=%d line.bounds.height=%d\n",
NS_STATIC_CAST(void*, aLine.get()),
aLine->mBounds.y, aLine->mBounds.height);
}
}
else {
lastHeight = 0;
}
}
#endif
// Only block frames horizontally align their children because
// inline frames "shrink-wrap" around their children (therefore
// there is no extra horizontal space).
const nsStyleText* styleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
PRBool allowJustify = NS_STYLE_TEXT_ALIGN_JUSTIFY == styleText->mTextAlign
&& !aLineLayout.GetLineEndsInBR() && ShouldJustifyLine(aState, aLine);
#ifdef IBMBIDI
nsRect bounds(aLine->mBounds);
if (mRect.x) {
const nsStyleVisibility* vis;
GetStyleData(eStyleStruct_Visibility, (const nsStyleStruct*&)vis);
if (NS_STYLE_DIRECTION_RTL == vis->mDirection) {
bounds.x += mRect.x;
}
}
PRBool successful = aLineLayout.HorizontalAlignFrames(bounds, allowJustify,
aState.GetFlag(BRS_SHRINKWRAPWIDTH));
// XXX: not only bidi: right alignment can be broken after RelativePositionFrames!!!
// XXXldb Is something here considering relatively positioned frames at
// other than their original positions?
#else
PRBool successful = aLineLayout.HorizontalAlignFrames(aLine->mBounds, allowJustify,
aState.GetFlag(BRS_SHRINKWRAPWIDTH));
#endif // IBMBIDI
if (!successful) {
// Mark the line dirty and then later once we've determined the width
// we can do the horizontal alignment
aLine->MarkDirty();
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
}
#ifdef IBMBIDI
// XXXldb Why don't we do this earlier?
else {
PRBool bidiEnabled;
aState.mPresContext->GetBidiEnabled(&bidiEnabled);
if (bidiEnabled) {
PRBool isVisual;
aState.mPresContext->IsVisualMode(isVisual);
if (!isVisual) {
nsBidiPresUtils* bidiUtils;
aState.mPresContext->GetBidiUtils(&bidiUtils);
if (bidiUtils && bidiUtils->IsSuccessful() ) {
nsIFrame* nextInFlow = (aLine.next() != end_lines())
? aLine.next()->mFirstChild : nsnull;
bidiUtils->ReorderFrames(aState.mPresContext,
aState.mReflowState.rendContext,
aLine->mFirstChild, nextInFlow,
aLine->GetChildCount() );
} // bidiUtils
} // not visual mode
} // bidi enabled
} // successful
#endif // IBMBIDI
nsRect combinedArea;
aLineLayout.RelativePositionFrames(combinedArea); // XXXldb This returned width as -15, 2001-06-12, Bugzilla
// XXX Changing the combined area here seems wrong. - LDB
aLine->SetCombinedArea(combinedArea);
if (addedBullet) {
aLineLayout.RemoveBulletFrame(mBullet);
}
// Inline lines do not have margins themselves; however they are
// impacted by prior block margins. If this line ends up having some
// height then we zero out the previous bottom margin value that was
// already applied to the line's starting Y coordinate. Otherwise we
// leave it be so that the previous blocks bottom margin can be
// collapsed with a block that follows.
nscoord newY;
if (aLine->mBounds.height > 0) {
// This line has some height. Therefore the application of the
// previous-bottom-margin should stick.
aState.mPrevBottomMargin.Zero();
newY = aLine->mBounds.YMost();
}
else {
// Don't let the previous-bottom-margin value affect the newY
// coordinate (it was applied in ReflowInlineFrames speculatively)
// since the line is empty.
nscoord dy = -aState.mPrevBottomMargin.get();
newY = aState.mY + dy;
aLine->SlideBy(dy);
// keep our ascent in sync
if (mLines.front() == aLine) {
mAscent += dy;
}
}
// See if the line fit. If it doesn't we need to push it. Our first
// line will always fit.
if ((mLines.front() != aLine) && (newY > aState.mBottomEdge)) {
// Push this line and all of it's children and anything else that
// follows to our next-in-flow
NS_ASSERTION((aState.mCurrentLine == aLine), "oops");
PushLines(aState, aLine.prev());
// Stop reflow and whack the reflow status if reflow hasn't
// already been stopped.
if (*aKeepReflowGoing) {
NS_ASSERTION(NS_FRAME_COMPLETE == aState.mReflowStatus,
"lost reflow status");
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
*aKeepReflowGoing = PR_FALSE;
}
return rv;
}
aState.mY = newY;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": line.floaters=%s band.floaterCount=%d\n",
//aLine->mFloaters.NotEmpty() ? "yes" : "no",
aState.mHaveRightFloaters ? "(have right floaters)" : "",
aState.mBand.GetFloaterCount());
#endif
if (0 != aState.mBand.GetFloaterCount()) {
// Add in floater impacts to the lines max-element-size
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
}
}
// If we're reflowing the line just to incrementally update the
// maximum width, then don't post-place the line. It's doing work we
// don't need, and it will update things like aState.mKidXMost that
// we don't want updated...
if (aUpdateMaximumWidth) {
// However, we do need to update the max-element-size if requested
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
aState.UpdateMaxElementSize(maxElementSize);
// We also cache the max element width in the line. This is needed for
// incremental reflow
aLine->mMaxElementWidth = maxElementSize.width;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::PlaceLine: %p setting MES for line %p to %d\n",
this, aLine, maxElementSize.width);
#endif
}
} else {
PostPlaceLine(aState, aLine, maxElementSize);
}
// Add the already placed current-line floaters to the line
aLine->AppendFloaters(aState.mCurrentLineFloaters);
// Any below current line floaters to place?
if (aState.mBelowCurrentLineFloaters.NotEmpty()) {
// Reflow the below-current-line floaters, then add them to the
// lines floater list.
aState.PlaceBelowCurrentLineFloaters(aState.mBelowCurrentLineFloaters);
aLine->AppendFloaters(aState.mBelowCurrentLineFloaters);
}
// When a line has floaters, factor them into the combined-area
// computations.
if (aLine->HasFloaters()) {
// Combine the floater combined area (stored in aState) and the
// value computed by the line layout code.
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": lineCA=%d,%d,%d,%d floaterCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height,
aState.mFloaterCombinedArea.x, aState.mFloaterCombinedArea.y,
aState.mFloaterCombinedArea.width,
aState.mFloaterCombinedArea.height);
#endif
CombineRects(aState.mFloaterCombinedArea, lineCombinedArea);
if (aState.mHaveRightFloaters &&
(aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) || aState.GetFlag(BRS_SHRINKWRAPWIDTH))) {
// We are reflowing in an unconstrained situation or shrink wrapping and
// have some right floaters. They were placed at the infinite right edge
// which will cause the combined area to be unusable.
//
// To solve this issue, we pretend that the right floaters ended up just
// past the end of the line. Note that the right floater combined area
// we computed as we were going will have as its X coordinate the left
// most edge of all the right floaters. Therefore, to accomplish our goal
// all we do is set that X value to the lines XMost value.
#ifdef NOISY_COMBINED_AREA
printf(" ==> rightFloaterCA=%d,%d,%d,%d lineXMost=%d\n",
aState.mRightFloaterCombinedArea.x,
aState.mRightFloaterCombinedArea.y,
aState.mRightFloaterCombinedArea.width,
aState.mRightFloaterCombinedArea.height,
aLine->mBounds.XMost());
#endif
aState.mRightFloaterCombinedArea.x = aLine->mBounds.XMost();
CombineRects(aState.mRightFloaterCombinedArea, lineCombinedArea);
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Mark the line dirty so we come back and re-place the floater once
// the shrink wrap width is determined
aLine->MarkDirty();
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
}
}
aLine->SetCombinedArea(lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
printf(" ==> final lineCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
#endif
aState.mHaveRightFloaters = PR_FALSE;
}
// Apply break-after clearing if necessary
PRUint8 breakType = aLine->GetBreakType();
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloaters(aState.mY, breakType);
break;
}
return rv;
}
// Compute the line's max-element-size by adding into the raw value
// computed by reflowing the contents of the line (aMaxElementSize)
// the impact of floaters on this line or the preceeding lines.
void
nsBlockFrame::ComputeLineMaxElementSize(nsBlockReflowState& aState,
nsLineBox* aLine,
nsSize* aMaxElementSize)
{
nscoord maxWidth, maxHeight;
aState.mBand.GetMaxElementSize(aState.mPresContext, &maxWidth, &maxHeight);
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": maxFloaterSize=%d,%d\n", maxWidth, maxHeight);
#endif
// To ensure that we always place some content next to a floater,
// _add_ the max floater width to our line's max element size.
aMaxElementSize->width += maxWidth;
// Only update the max-element-size's height value if the floater is
// part of the current line.
if (aLine->HasFloaters()) {
// If the maximum-height of the tallest floater is larger than the
// maximum-height of the content then update the max-element-size
// height
if (maxHeight > aMaxElementSize->height) {
aMaxElementSize->height = maxHeight;
}
}
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::ComputeLineMaxElementSize: %p returning MES %d\n",
this, aMaxElementSize->width);
#endif
}
void
nsBlockFrame::PostPlaceLine(nsBlockReflowState& aState,
nsLineBox* aLine,
const nsSize& aMaxElementSize)
{
// If it's inline elements, then make sure the views are correctly
// positioned and sized
if (aLine->IsInline()) {
nsIFrame* frame = aLine->mFirstChild;
for (PRInt32 i = 0; i < aLine->GetChildCount(); i++) {
::PlaceFrameView(aState.mPresContext, frame);
frame->GetNextSibling(&frame);
}
}
// Update max-element-size
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
aState.UpdateMaxElementSize(aMaxElementSize);
// We also cache the max element width in the line. This is needed for
// incremental reflow
aLine->mMaxElementWidth = aMaxElementSize.width;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::PostPlaceLine: %p setting line %p MES %d\n",
this, aLine, aMaxElementSize.width);
#endif
}
// If this is an unconstrained reflow, then cache the line width in the
// line. We'll need this during incremental reflow if we're asked to
// calculate the maximum width
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)) {
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::PostPlaceLine during UC Reflow of block %p line %p caching max width %d\n",
this, aLine, aLine->mBounds.XMost());
#endif
aLine->mMaximumWidth = aLine->mBounds.XMost();
}
// Update xmost
nscoord xmost = aLine->mBounds.XMost();
#ifdef DEBUG
if (CRAZY_WIDTH(xmost)) {
ListTag(stdout);
printf(": line=%p xmost=%d\n", NS_STATIC_CAST(void*, aLine), xmost);
}
#endif
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
#ifdef NOISY_KIDXMOST
printf("%p PostPlaceLine aState.mKidXMost=%d\n", this, aState.mKidXMost);
#endif
}
}
void
nsBlockFrame::PushLines(nsBlockReflowState& aState,
nsLineList::iterator aLineBefore)
{
nsLineList::iterator overBegin(aLineBefore.next());
NS_ASSERTION(overBegin != begin_lines(), "bad push");
if (overBegin != end_lines()) {
// XXXldb use presshell arena!
nsLineList* overflowLines = new nsLineList();
overflowLines->splice(overflowLines->end(), mLines, overBegin,
end_lines());
NS_ASSERTION(!overflowLines->empty(), "should not be empty");
// this takes ownership but it won't delete it immediately so we
// can keep using it.
SetOverflowLines(aState.mPresContext, overflowLines);
// Mark all the overflow lines dirty so that they get reflowed when
// they are pulled up by our next-in-flow.
// XXXldb Can this get called O(N) times making the whole thing O(N^2)?
for (line_iterator line = overflowLines->begin(),
line_end = overflowLines->end();
line != line_end;
++line)
{
line->MarkDirty();
}
}
// Break frame sibling list
aLineBefore->LastChild()->SetNextSibling(nsnull);
#ifdef DEBUG
VerifyOverflowSituation(aState.mPresContext);
#endif
}
// The overflowLines property is stored as a pointer to a line list,
// which must be deleted. However, the following functions all maintain
// the invariant that the property is never set if the list is empty.
PRBool
nsBlockFrame::DrainOverflowLines(nsIPresContext* aPresContext)
{
#ifdef DEBUG
VerifyOverflowSituation(aPresContext);
#endif
PRBool drained = PR_FALSE;
nsLineList* overflowLines;
// First grab the prev-in-flows overflow lines
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
if (nsnull != prevBlock) {
overflowLines = prevBlock->GetOverflowLines(aPresContext, PR_TRUE);
if (nsnull != overflowLines) {
NS_ASSERTION(! overflowLines->empty(),
"overflow lines should never be set and empty");
drained = PR_TRUE;
// Make all the frames on the overflow line list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = overflowLines->front()->mFirstChild;
while (nsnull != frame) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, prevBlock, this);
// If the frame we are looking at is a placeholder for a floater, we
// need to reparent both it's out-of-flow frame and any views it has.
//
// Note: A floating table (example: style="position: relative; float: right")
// is an example of an out-of-flow frame with a view
nsCOMPtr<nsIAtom> frameType;
frame->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::placeholderFrame == frameType.get()) {
nsIFrame *outOfFlowFrame = NS_STATIC_CAST(nsPlaceholderFrame*, frame)->GetOutOfFlowFrame();
if (outOfFlowFrame) {
const nsStyleDisplay* display = nsnull;
outOfFlowFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
if (display && !display->IsAbsolutelyPositioned()) {
// It's not an absolute or fixed positioned frame, so it
// must be a floater!
outOfFlowFrame->SetParent(this);
nsHTMLContainerFrame::ReparentFrameView(aPresContext, outOfFlowFrame, prevBlock, this);
}
}
}
// Get the next frame
lastFrame = frame;
frame->GetNextSibling(&frame);
}
// Join the line lists
NS_ASSERTION(lastFrame, "overflow list was created with no frames");
if (! mLines.empty()) {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines.front()->mFirstChild);
}
// Place overflow lines at the front of our line list
mLines.splice(mLines.begin(), *overflowLines);
NS_ASSERTION(overflowLines->empty(), "splice should empty list");
delete overflowLines;
}
}
// Now grab our own overflow lines
overflowLines = GetOverflowLines(aPresContext, PR_TRUE);
if (overflowLines) {
NS_ASSERTION(! overflowLines->empty(),
"overflow lines should never be set and empty");
// This can happen when we reflow and not everything fits and then
// we are told to reflow again before a next-in-flow is created
// and reflows.
if (! mLines.empty()) {
mLines.back()->LastChild()->SetNextSibling(
overflowLines->front()->mFirstChild );
}
// append the overflow to mLines
mLines.splice(mLines.end(), *overflowLines);
drained = PR_TRUE;
delete overflowLines;
}
return drained;
}
nsLineList*
nsBlockFrame::GetOverflowLines(nsIPresContext* aPresContext,
PRBool aRemoveProperty) const
{
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
PRUint32 options = 0;
nsLineList* value;
if (aRemoveProperty) {
options |= NS_IFRAME_MGR_REMOVE_PROP;
}
frameManager->GetFrameProperty(NS_CONST_CAST(nsBlockFrame*, this),
nsLayoutAtoms::overflowLinesProperty,
options,
NS_REINTERPRET_CAST(void**, &value));
NS_ASSERTION(!value || !value->empty(),
"value should never be stored as empty");
return value;
}
}
return nsnull;
}
// Destructor function for the overflowLines frame property
static void
DestroyOverflowLines(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIAtom* aPropertyName,
void* aPropertyValue)
{
if (aPropertyValue) {
nsLineList* lines = NS_STATIC_CAST(nsLineList*, aPropertyValue);
nsLineBox::DeleteLineList(aPresContext, *lines);
delete lines;
}
}
// This takes ownership of aOverflowLines.
// XXX We should allocate overflowLines from presShell arena!
nsresult
nsBlockFrame::SetOverflowLines(nsIPresContext* aPresContext,
nsLineList* aOverflowLines)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = NS_ERROR_FAILURE;
NS_ASSERTION(aOverflowLines, "null lines");
NS_ASSERTION(! aOverflowLines->empty(), "empty lines");
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
rv = frameManager->SetFrameProperty(this,
nsLayoutAtoms::overflowLinesProperty,
aOverflowLines,
DestroyOverflowLines);
// Verify that we didn't overwrite an existing overflow list
NS_ASSERTION(rv != NS_IFRAME_MGR_PROP_OVERWRITTEN, "existing overflow list");
}
}
return rv;
}
//////////////////////////////////////////////////////////////////////
// Frame list manipulation routines
nsIFrame*
nsBlockFrame::LastChild()
{
if (! mLines.empty()) {
return mLines.back()->LastChild();
}
return nsnull;
}
NS_IMETHODIMP
nsBlockFrame::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsnull == aFrameList) {
return NS_OK;
}
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName,
aFrameList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// XXX we don't *really* care about this right now because we are
// BuildFloaterList ing still
mFloaters.AppendFrames(nsnull, aFrameList);
return NS_OK;
}
else if (nsnull != aListName) {
return NS_ERROR_INVALID_ARG;
}
// Find the proper last-child for where the append should go
nsIFrame* lastKid = nsnull;
nsLineBox* lastLine = mLines.empty() ? nsnull : mLines.back();
if (lastLine) {
lastKid = lastLine->LastChild();
}
// Add frames after the last child
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": append ");
nsFrame::ListTag(stdout, aFrameList);
if (lastKid) {
printf(" after ");
nsFrame::ListTag(stdout, lastKid);
}
printf("\n");
#endif
nsresult rv = AddFrames(aPresContext, aFrameList, lastKid);
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
NS_IMETHODIMP
nsBlockFrame::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// XXX we don't *really* care about this right now because we are
// BuildFloaterList'ing still
mFloaters.AppendFrames(nsnull, aFrameList);
return NS_OK;
}
#ifdef IBMBIDI
else if (nsLayoutAtoms::nextBidi == aListName) {}
#endif // IBMBIDI
else if (nsnull != aListName) {
return NS_ERROR_INVALID_ARG;
}
#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 = AddFrames(aPresContext, aFrameList, aPrevFrame);
#ifdef IBMBIDI
if (aListName != nsLayoutAtoms::nextBidi)
#endif // IBMBIDI
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
nsresult
nsBlockFrame::AddFrames(nsIPresContext* aPresContext,
nsIFrame* aFrameList,
nsIFrame* aPrevSibling)
{
if (nsnull == aFrameList) {
return NS_OK;
}
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
// Attempt to find the line that contains the previous sibling
nsLineList::iterator prevSibLine = end_lines();
PRInt32 prevSiblingIndex = -1;
if (aPrevSibling) {
// XXX_perf This is technically O(N^2) in some cases, but by using
// RFind instead of Find, we make it O(N) in the most common case,
// which is appending cotent.
// Find the line that contains the previous sibling
if (! nsLineBox::RFindLineContaining(aPrevSibling,
begin_lines(), prevSibLine,
&prevSiblingIndex)) {
// Note: defensive code! RFindLineContaining must not return
// false in this case, so if it does...
NS_NOTREACHED("prev sibling not in line list");
aPrevSibling = nsnull;
prevSibLine = end_lines();
}
}
// Find the frame following aPrevSibling so that we can join up the
// two lists of frames.
nsIFrame* prevSiblingNextFrame = nsnull;
if (aPrevSibling) {
aPrevSibling->GetNextSibling(&prevSiblingNextFrame);
// Split line containing aPrevSibling in two if the insertion
// point is somewhere in the middle of the line.
PRInt32 rem = prevSibLine->GetChildCount() - prevSiblingIndex - 1;
if (rem) {
// Split the line in two where the frame(s) are being inserted.
nsLineBox* line = NS_NewLineBox(presShell, prevSiblingNextFrame, rem, PR_FALSE);
if (!line) {
return NS_ERROR_OUT_OF_MEMORY;
}
mLines.after_insert(prevSibLine, line);
prevSibLine->SetChildCount(prevSibLine->GetChildCount() - rem);
prevSibLine->MarkDirty();
}
// Now (partially) join the sibling lists together
aPrevSibling->SetNextSibling(aFrameList);
}
else if (! mLines.empty()) {
prevSiblingNextFrame = mLines.front()->mFirstChild;
}
// Walk through the new frames being added and update the line data
// structures to fit.
nsIFrame* newFrame = aFrameList;
while (newFrame) {
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(newFrame);
// If the frame is a block frame, or if there is no previous line
// or if the previous line is a block line then make a new line.
if (isBlock || prevSibLine == end_lines() || prevSibLine->IsBlock()) {
// Create a new line for the frame and add its line to the line
// list.
nsLineBox* line = NS_NewLineBox(presShell, newFrame, 1, isBlock);
if (!line) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (prevSibLine != end_lines()) {
// Append new line after prevSibLine
mLines.after_insert(prevSibLine, line);
++prevSibLine;
}
else {
// New line is going before the other lines
mLines.push_front(line);
prevSibLine = begin_lines();
}
}
else {
prevSibLine->SetChildCount(prevSibLine->GetChildCount() + 1);
prevSibLine->MarkDirty();
}
aPrevSibling = newFrame;
newFrame->GetNextSibling(&newFrame);
}
if (prevSiblingNextFrame) {
// Connect the last new frame to the remainder of the sibling list
aPrevSibling->SetNextSibling(prevSiblingNextFrame);
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
void
nsBlockFrame::FixParentAndView(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
while (aFrame) {
nsIFrame* oldParent;
aFrame->GetParent(&oldParent);
aFrame->SetParent(this);
if (this != oldParent) {
nsHTMLContainerFrame::ReparentFrameView(aPresContext, aFrame, oldParent, this);
aPresContext->ReParentStyleContext(aFrame, mStyleContext);
}
aFrame->GetNextSibling(&aFrame);
}
}
NS_IMETHODIMP
nsBlockFrame::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
nsresult rv = NS_OK;
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": remove ");
nsFrame::ListTag(stdout, aOldFrame);
printf("\n");
#endif
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// Remove floater from the floater list first
mFloaters.RemoveFrame(aOldFrame);
// Find which line contains the floater
line_iterator line = begin_lines(), line_end = end_lines();
for ( ; line != line_end; ++line) {
if (line->IsInline() && line->RemoveFloater(aOldFrame)) {
aOldFrame->Destroy(aPresContext);
break;
}
}
// Mark every line at and below the line where the floater was dirty
// XXXldb This could be done more efficiently.
for ( ; line != line_end; ++line) {
line->MarkDirty();
}
}
#ifdef IBMBIDI
else if (nsLayoutAtoms::nextBidi == aListName) {
rv = DoRemoveFrame(aPresContext, aOldFrame);
}
#endif // IBMBIDI
else if (nsnull != aListName) {
rv = NS_ERROR_INVALID_ARG;
}
else {
rv = DoRemoveFrame(aPresContext, aOldFrame);
}
#ifdef IBMBIDI
if (nsLayoutAtoms::nextBidi != aListName)
#endif // IBMBIDI
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
nsresult
nsBlockFrame::DoRemoveFrame(nsIPresContext* aPresContext,
nsIFrame* aDeletedFrame)
{
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
// Find the line and the previous sibling that contains
// deletedFrame; we also find the pointer to the line.
nsBlockFrame* flow = this;
nsLineList& lines = flow->mLines;
nsLineList::iterator line = lines.begin(),
line_end = lines.end();
nsIFrame* prevSibling = nsnull;
for ( ; line != line_end; ++line) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
if (frame == aDeletedFrame) {
goto found_frame;
}
prevSibling = frame;
frame->GetNextSibling(&frame);
}
}
found_frame:;
#ifdef NS_DEBUG
NS_ASSERTION(line != line_end, "can't find deleted frame in lines");
if (nsnull != prevSibling) {
nsIFrame* tmp;
prevSibling->GetNextSibling(&tmp);
NS_ASSERTION(tmp == aDeletedFrame, "bad prevSibling");
}
#endif
// Remove frame and all of its continuations
while (nsnull != aDeletedFrame) {
while ((line != line_end) && (nsnull != aDeletedFrame)) {
#ifdef NS_DEBUG
nsIFrame* parent;
aDeletedFrame->GetParent(&parent);
NS_ASSERTION(flow == parent, "messed up delete code");
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
#endif
// See if the frame being deleted is the last one on the line
PRBool isLastFrameOnLine = PR_FALSE;
if (1 == line->GetChildCount()) {
isLastFrameOnLine = PR_TRUE;
}
else if (line->LastChild() == aDeletedFrame) {
isLastFrameOnLine = PR_TRUE;
}
// Remove aDeletedFrame from the line
nsIFrame* nextFrame;
aDeletedFrame->GetNextSibling(&nextFrame);
if (line->mFirstChild == aDeletedFrame) {
line->mFirstChild = nextFrame;
}
--line;
if (line != line_end && !line->IsBlock()) {
// Since we just removed a frame that follows some inline
// frames, we need to reflow the previous line.
line->MarkDirty();
}
++line;
// Take aDeletedFrame out of the sibling list. Note that
// prevSibling will only be nsnull when we are deleting the very
// first frame.
if (prevSibling) {
prevSibling->SetNextSibling(nextFrame);
}
// Destroy frame; capture its next-in-flow first in case we need
// to destroy that too.
nsIFrame* nextInFlow;
aDeletedFrame->GetNextInFlow(&nextInFlow);
nsSplittableType st;
aDeletedFrame->IsSplittable(st);
if (NS_FRAME_NOT_SPLITTABLE != st) {
nsSplittableFrame::RemoveFromFlow(aDeletedFrame);
}
#ifdef NOISY_REMOVE_FRAME
printf("DoRemoveFrame: line=%p frame=", line);
nsFrame::ListTag(stdout, aDeletedFrame);
printf(" prevSibling=%p nextInFlow=%p\n", prevSibling, nextInFlow);
#endif
aDeletedFrame->Destroy(aPresContext);
aDeletedFrame = nextInFlow;
// If line is empty, remove it now
PRInt32 lineChildCount = line->GetChildCount();
if (0 == --lineChildCount) {
nsLineBox *cur = line;
line = lines.erase(line);
// Invalidate the space taken up by the line.
// XXX We need to do this if we're removing a frame as a result of
// a call to RemoveFrame(), but we may not need to do this in all
// cases...
nsRect lineCombinedArea;
cur->GetCombinedArea(&lineCombinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 10 (%d, %d, %d, %d)\n",
this, lineCombinedArea.x, lineCombinedArea.y, lineCombinedArea.width, lineCombinedArea.height);
#endif
if (!lineCombinedArea.IsEmpty()) {
Invalidate(aPresContext, lineCombinedArea);
}
cur->Destroy(presShell);
// If we're removing a line, ReflowDirtyLines isn't going to
// know that it needs to slide lines unless something is marked
// dirty. So mark the previous margin of the next line dirty if
// there is one.
if (line != line_end)
line->MarkPreviousMarginDirty();
}
else {
// Make the line that just lost a frame dirty
line->SetChildCount(lineChildCount);
line->MarkDirty();
// If we just removed the last frame on the line then we need
// to advance to the next line.
if (isLastFrameOnLine) {
++line;
}
}
// See if we should keep looking in the current flow's line list.
if (nsnull != aDeletedFrame) {
if (aDeletedFrame != nextFrame) {
// The deceased frames continuation is not the next frame in
// the current flow's frame list. Therefore we know that the
// continuation is in a different parent. So break out of
// the loop so that we advance to the next parent.
#ifdef NS_DEBUG
nsIFrame* checkParent;
aDeletedFrame->GetParent(&checkParent);
NS_ASSERTION(checkParent != flow, "strange continuation");
#endif
break;
}
}
}
// Advance to next flow block if the frame has more continuations
if (flow && aDeletedFrame) {
flow = (nsBlockFrame*) flow->mNextInFlow;
NS_ASSERTION(nsnull != flow, "whoops, continuation without a parent");
// add defensive pointer check for bug 56894
if(flow) {
lines = flow->mLines;
line = lines.begin();
line_end = lines.end();
prevSibling = nsnull;
}
}
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
void
nsBlockFrame::DeleteChildsNextInFlow(nsIPresContext* aPresContext,
nsIFrame* aChild)
{
NS_PRECONDITION(IsChild(aPresContext, aChild), "bad geometric parent");
nsIFrame* nextInFlow;
aChild->GetNextInFlow(&nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
#ifdef IBMBIDI
nsIFrame* nextBidi;
aChild->GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi,
(void**) &nextBidi,sizeof(nextBidi));
if (nextBidi != nextInFlow) {
#endif // IBMBIDI
nsBlockFrame* parent;
nextInFlow->GetParent((nsIFrame**)&parent);
NS_PRECONDITION(nsnull != parent, "next-in-flow with no parent");
NS_PRECONDITION(! parent->mLines.empty(), "next-in-flow with weird parent");
// NS_PRECONDITION(nsnull == parent->mOverflowLines, "parent with overflow");
parent->DoRemoveFrame(aPresContext, nextInFlow);
#ifdef IBMBIDI
}
#endif // IBMBIDI
}
////////////////////////////////////////////////////////////////////////
// Floater support
nsresult
nsBlockFrame::ReflowFloater(nsBlockReflowState& aState,
nsPlaceholderFrame* aPlaceholder,
nsRect& aCombinedRectResult,
nsMargin& aMarginResult,
nsMargin& aComputedOffsetsResult)
{
// Reflow the floater.
nsIFrame* floater = aPlaceholder->GetOutOfFlowFrame();
#ifdef NOISY_FLOATER
printf("Reflow Floater %p in parent %p, availSpace(%d,%d,%d,%d)\n",
aPlaceholder->GetOutOfFlowFrame(), this,
aState.mAvailSpaceRect.x, aState.mAvailSpaceRect.y,
aState.mAvailSpaceRect.width, aState.mAvailSpaceRect.height
);
#endif
// Compute the available width. By default, assume the width of the
// containing block.
nscoord availWidth = aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)
? NS_UNCONSTRAINEDSIZE
: aState.mContentArea.width;
// If the floater's width is automatic, we can't let the floater's
// width shrink below its maxElementSize.
const nsStylePosition* position;
floater->GetStyleData(eStyleStruct_Position,
NS_REINTERPRET_CAST(const nsStyleStruct*&, position));
PRBool isAutoWidth = (eStyleUnit_Auto == position->mWidth.GetUnit());
// We'll need to compute the max element size if either 1) we're
// auto-width or 2) the state wanted us to compute it anyway.
PRBool computeMaxElementSize =
isAutoWidth || aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE);
nsRect availSpace(aState.BorderPadding().left,
aState.BorderPadding().top,
availWidth, NS_UNCONSTRAINEDSIZE);
// Setup a block reflow state to reflow the floater.
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
computeMaxElementSize,
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
brc.SetNextRCFrame(aState.mNextRCFrame);
// Reflow the floater
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
nsReflowStatus frameReflowStatus;
nsCollapsingMargin margin;
nsresult rv = brc.ReflowBlock(floater, availSpace, PR_TRUE, margin,
isAdjacentWithTop,
aComputedOffsetsResult, frameReflowStatus);
if (NS_SUCCEEDED(rv) && isAutoWidth) {
nscoord maxElementWidth = brc.GetMaxElementSize().width;
if (maxElementWidth > availSpace.width) {
// The floater's maxElementSize is larger than the available
// width. Reflow it again, this time pinning the width to the
// maxElementSize.
availSpace.width = maxElementWidth;
nsCollapsingMargin marginMES;
rv = brc.ReflowBlock(floater, availSpace, PR_TRUE, marginMES,
isAdjacentWithTop,
aComputedOffsetsResult, frameReflowStatus);
}
}
if (brc.BlockShouldInvalidateItself() && !mRect.IsEmpty()) {
Invalidate(aState.mPresContext, mRect);
}
if (floater == aState.mNextRCFrame) {
// Null out mNextRCFrame so if we reflow it again, we don't think
// it's still an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
// Capture the margin information for the caller
const nsMargin& m = brc.GetMargin();
aMarginResult.top = brc.GetTopMargin();
aMarginResult.right = m.right;
brc.GetCarriedOutBottomMargin().Include(m.bottom);
aMarginResult.bottom = brc.GetCarriedOutBottomMargin().get();
aMarginResult.left = m.left;
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
aCombinedRectResult = metrics.mOverflowArea;
// Set the rect, make sure the view is properly sized and positioned,
// and tell the frame we're done reflowing it
// XXXldb This seems like the wrong place to be doing this -- shouldn't
// we be doing this in nsBlockReflowState::FlowAndPlaceFloater after
// we've positioned the floater, and shouldn't we be doing the equivalent
// of |::PlaceFrameView| here?
floater->SizeTo(aState.mPresContext, metrics.width, metrics.height);
nsIView* view;
floater->GetView(aState.mPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(aState.mPresContext, floater, view,
&metrics.mOverflowArea,
NS_FRAME_NO_MOVE_VIEW);
}
floater->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
// If we computed it, then stash away the max-element-size for later
if (computeMaxElementSize) {
nsSize mes = brc.GetMaxElementSize();
mes.SizeBy(aMarginResult.left + aMarginResult.right,
aMarginResult.top + aMarginResult.bottom);
aState.StoreMaxElementSize(floater, mes);
aState.UpdateMaxElementSize(mes); // fix for bug 13553
}
#ifdef NOISY_FLOATER
printf("end ReflowFloater %p, sized to %d,%d\n", floater, metrics.width, metrics.height);
#endif
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Painting, event handling
PRIntn
nsBlockFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
#ifdef DEBUG
static void ComputeCombinedArea(nsLineList& aLines,
nscoord aWidth, nscoord aHeight,
nsRect& aResult)
{
nscoord xa = 0, ya = 0, xb = aWidth, yb = aHeight;
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
line != line_end;
++line) {
// Compute min and max x/y values for the reflowed frame's
// combined areas
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nscoord x = lineCombinedArea.x;
nscoord y = lineCombinedArea.y;
nscoord xmost = x + lineCombinedArea.width;
nscoord ymost = y + lineCombinedArea.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
}
aResult.x = xa;
aResult.y = ya;
aResult.width = xb - xa;
aResult.height = yb - ya;
}
#endif
NS_IMETHODIMP
nsBlockFrame::IsVisibleForPainting(nsIPresContext * aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aCheckVis,
PRBool* aIsVisible)
{
// first check to see if we are visible
if (aCheckVis) {
const nsStyleVisibility* vis =
(const nsStyleVisibility*)((nsIStyleContext*)mStyleContext)->GetStyleData(eStyleStruct_Visibility);
if (!vis->IsVisible()) {
*aIsVisible = PR_FALSE;
return NS_OK;
}
}
// Start by assuming we are visible and need to be painted
*aIsVisible = PR_TRUE;
// NOTE: GetSelectionforVisCheck checks the pagination to make sure we are printing
// In otherwords, the selection will ALWAYS be null if we are not printing, meaning
// the visibility will be TRUE in that case
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelectionForVisCheck(aPresContext, getter_AddRefs(selection));
if (NS_SUCCEEDED(rv) && selection) {
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
nsCOMPtr<nsIDOMHTMLHtmlElement> html(do_QueryInterface(mContent));
nsCOMPtr<nsIDOMHTMLBodyElement> body(do_QueryInterface(mContent));
if (!html && !body) {
rv = selection->ContainsNode(node, PR_TRUE, aIsVisible);
}
}
return rv;
}
NS_IMETHODIMP
nsBlockFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
if (NS_FRAME_IS_UNFLOWABLE & mState) {
return NS_OK;
}
#ifdef DEBUG
if (gNoisyDamageRepair) {
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
PRInt32 depth = GetDepth();
nsRect ca;
ComputeCombinedArea(mLines, mRect.width, mRect.height, ca);
nsFrame::IndentBy(stdout, depth);
ListTag(stdout);
printf(": bounds=%d,%d,%d,%d dirty=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
mRect.x, mRect.y, mRect.width, mRect.height,
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height,
ca.x, ca.y, ca.width, ca.height);
}
}
#endif
PRBool isVisible;
if (NS_FAILED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible))) {
return NS_ERROR_FAILURE;
}
// Only paint the border and background if we're visible
if (isVisible && (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) &&
(0 != mRect.width) && (0 != mRect.height)) {
PRIntn skipSides = GetSkipSides();
const nsStyleBackground* color = (const nsStyleBackground*)
mStyleContext->GetStyleData(eStyleStruct_Background);
const nsStyleBorder* border = (const nsStyleBorder*)
mStyleContext->GetStyleData(eStyleStruct_Border);
const nsStyleOutline* outline = (const nsStyleOutline*)
mStyleContext->GetStyleData(eStyleStruct_Outline);
// Paint background, border and outline
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *border, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *border, mStyleContext,
skipSides);
nsCSSRendering::PaintOutline(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *border, *outline, mStyleContext, 0);
}
PRBool paintingSuppressed = PR_FALSE;
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
shell->IsPaintingSuppressed(&paintingSuppressed);
if (paintingSuppressed)
return NS_OK;
const nsStyleDisplay* disp = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
// If overflow is hidden then set the clip rect so that children don't
// leak out of us. Note that because overflow'-clip' only applies to
// the content area we do this after painting the border and background
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
aRenderingContext.PushState();
SetOverflowClipRect(aRenderingContext);
}
// Child elements have the opportunity to override the visibility
// property and display even if the parent is hidden
if (NS_FRAME_PAINT_LAYER_FLOATERS == aWhichLayer) {
PaintFloaters(aPresContext, aRenderingContext, aDirtyRect);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
PRBool clipState;
aRenderingContext.PopState(clipState);
}
#if 0
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
// Render the bands in the spacemanager
nsSpaceManager* sm = mSpaceManager;
if (nsnull != sm) {
nsBlockBandData band;
band.Init(sm, nsSize(mRect.width, mRect.height));
nscoord y = 0;
while (y < mRect.height) {
nsRect availArea;
band.GetAvailableSpace(y, availArea);
// Render a box and a diagonal line through the band
aRenderingContext.SetColor(NS_RGB(0,255,0));
aRenderingContext.DrawRect(0, availArea.y,
mRect.width, availArea.height);
aRenderingContext.DrawLine(0, availArea.y,
mRect.width, availArea.YMost());
// Render boxes and opposite diagonal lines around the
// unavailable parts of the band.
PRInt32 i;
for (i = 0; i < band.GetTrapezoidCount(); i++) {
const nsBandTrapezoid* trapezoid = band.GetTrapezoid(i);
if (nsBandTrapezoid::Available != trapezoid->mState) {
nsRect r;
trapezoid->GetRect(r);
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->mState) {
aRenderingContext.SetColor(NS_RGB(0,255,128));
}
else {
aRenderingContext.SetColor(NS_RGB(128,255,0));
}
aRenderingContext.DrawRect(r);
aRenderingContext.DrawLine(r.x, r.YMost(), r.XMost(), r.y);
}
}
y = availArea.YMost();
}
}
}
#endif
return NS_OK;
}
void
nsBlockFrame::PaintFloaters(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
if (!line->HasFloaters()) {
continue;
}
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_BACKGROUND);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_FLOATERS);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_FOREGROUND);
fc = fc->Next();
}
}
}
void
nsBlockFrame::PaintChildren(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
#ifdef DEBUG
PRInt32 depth = 0;
if (gNoisyDamageRepair) {
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
depth = GetDepth();
}
}
PRTime start = LL_ZERO; // Initialize these variables to silence the compiler.
PRInt32 drawnLines = 0; // They will only be used if set (gLamePaintMetrics).
if (gLamePaintMetrics) {
start = PR_Now();
drawnLines = 0;
}
#endif
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
// If the line's combined area (which includes child frames that
// stick outside of the line's bounding box or our bounding box)
// intersects the dirty rect then paint the line.
if (line->CombinedAreaIntersects(aDirtyRect)) {
#ifdef DEBUG
if (gNoisyDamageRepair &&
(NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer)) {
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nsFrame::IndentBy(stdout, depth+1);
printf("draw line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
NS_STATIC_CAST(void*, line.get()),
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
}
if (gLamePaintMetrics) {
drawnLines++;
}
#endif
nsIFrame* kid = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
aWhichLayer);
kid->GetNextSibling(&kid);
}
}
#ifdef DEBUG
else {
if (gNoisyDamageRepair &&
(NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer)) {
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nsFrame::IndentBy(stdout, depth+1);
printf("skip line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
NS_STATIC_CAST(void*, line.get()),
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
}
}
#endif
}
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
if ((nsnull != mBullet) && HaveOutsideBullet()) {
// Paint outside bullets manually
PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
aWhichLayer);
}
}
#ifdef DEBUG
if (gLamePaintMetrics) {
PRTime end = PR_Now();
PRInt32 numLines = mLines.size();
if (!numLines) numLines = 1;
PRTime lines, deltaPerLine, delta;
LL_I2L(lines, numLines);
LL_SUB(delta, end, start);
LL_DIV(deltaPerLine, delta, lines);
ListTag(stdout);
char buf[400];
PR_snprintf(buf, sizeof(buf),
": %lld elapsed (%lld per line) lines=%d drawn=%d skip=%d",
delta, deltaPerLine,
numLines, drawnLines, numLines - drawnLines);
printf("%s\n", buf);
}
#endif
}
// XXXldb Does this handle all overlap cases correctly? (How?)
nsresult
nsBlockFrame::GetClosestLine(nsILineIterator *aLI,
const nsPoint &aOrigin,
const nsPoint &aPoint,
PRInt32 &aClosestLine)
{
if (!aLI)
return NS_ERROR_NULL_POINTER;
nsRect rect;
PRInt32 numLines;
PRInt32 lineFrameCount;
nsIFrame *firstFrame;
PRUint32 flags;
nsresult result = aLI->GetNumLines(&numLines);
if (NS_FAILED(result) || numLines < 0)
return NS_OK;//do not handle
PRInt32 shifted = numLines;
PRInt32 start = 0, midpoint = 0;
PRInt32 y = 0;
while(shifted > 0)
{
// Cut the number of lines to look at in half and
// calculate the midpoint of the region we are looking at.
shifted >>= 1; //divide by 2
midpoint = start + shifted;
// Get the dimensions of the line that is at the half
// point of the region we are looking at.
result = aLI->GetLine(midpoint, &firstFrame, &lineFrameCount,rect,&flags);
if (NS_FAILED(result))
break;//do not handle
// Check to see if our point lies with the line's Y bounds.
rect+=aOrigin; //offset origin to get comparative coordinates
y = aPoint.y - rect.y;
if (y >=0 && (aPoint.y < (rect.y+rect.height)))
{
aClosestLine = midpoint; //spot on!
return NS_OK;
}
if (y > 0)
{
// If we get here, no match was found above, so aPoint.y must
// be greater than the Y bounds of the current line rect. Move
// our starting point just beyond the midpoint of the current region.
start = midpoint;
if (numLines > 1 && start < (numLines - 1))
++start;
else
shifted = 0;
}
}
// Make sure we don't go off the edge in either direction!
NS_ASSERTION(start >=0 && start <= numLines, "Invalid start calculated.");
if (start < 0)
start = 0;
else if (start >= numLines)
start = numLines - 1;
aClosestLine = start; //close as we could come
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
nsresult result;
nsCOMPtr<nsIPresShell> shell;
if (aEvent->message == NS_MOUSE_MOVE) {
aPresContext->GetShell(getter_AddRefs(shell));
if (!shell)
return NS_OK;
nsCOMPtr<nsIFrameSelection> frameSelection;
PRBool mouseDown = PR_FALSE;
//check to see if we need to ask the selection controller..
if (mState & NS_FRAME_INDEPENDENT_SELECTION)
{
nsCOMPtr<nsISelectionController> selCon;
result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
if (NS_FAILED(result) || !selCon)
return result?result:NS_ERROR_FAILURE;
frameSelection = do_QueryInterface(selCon);
}
else
shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (!frameSelection || NS_FAILED(frameSelection->GetMouseDownState(&mouseDown)) || !mouseDown)
return NS_OK;//do not handle
}
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN || aEvent->message == NS_MOUSE_MOVE ||
aEvent->message == NS_MOUSE_LEFT_DOUBLECLICK ) {
nsMouseEvent *me = (nsMouseEvent *)aEvent;
nsIFrame *resultFrame = nsnull;//this will be passed the handle event when we
//can tell who to pass it to
nsIFrame *mainframe = this;
aPresContext->GetShell(getter_AddRefs(shell));
if (!shell)
return NS_OK;
nsCOMPtr<nsIFocusTracker> tracker( do_QueryInterface(shell, &result) );
nsCOMPtr<nsILineIterator> it( do_QueryInterface(mainframe, &result) );
nsIView* parentWithView;
nsPoint origin;
nsPeekOffsetStruct pos;
while(NS_OK == result)
{ //we are starting aloop to allow us to "drill down to the one we want"
mainframe->GetOffsetFromView(aPresContext, origin, &parentWithView);
if (NS_FAILED(result))
return NS_OK;//do not handle
PRInt32 closestLine;
if (NS_FAILED(result = GetClosestLine(it,origin,aEvent->point,closestLine)))
return result;
//we will now ask where to go. if we cant find what we want"aka another block frame"
//we drill down again
pos.mTracker = tracker;
pos.mDirection = eDirNext;
pos.mDesiredX = aEvent->point.x;
result = nsFrame::GetNextPrevLineFromeBlockFrame(aPresContext,
&pos,
mainframe,
closestLine-1,
0
);
if (NS_SUCCEEDED(result) && pos.mResultFrame){
if (result == NS_OK)
it = do_QueryInterface(pos.mResultFrame, &result);//if this fails thats ok
resultFrame = pos.mResultFrame;
mainframe = resultFrame;
}
else
break;//time to go nothing was found
}
//end while loop. if nssucceeded resutl then keep going that means
//we have successfully hit another block frame and we should keep going.
if (resultFrame)
{
if (NS_COMFALSE == result)
{
nsCOMPtr<nsISelectionController> selCon;
result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
//get the selection controller
if (NS_SUCCEEDED(result) && selCon)
{
PRInt16 displayresult;
selCon->GetDisplaySelection(&displayresult);
if (displayresult == nsISelectionController::SELECTION_OFF)
return NS_OK;//nothing to do we cannot affect selection from here
}
nsCOMPtr<nsIFrameSelection> frameselection;
shell->GetFrameSelection(getter_AddRefs(frameselection));
PRBool mouseDown = aEvent->message == NS_MOUSE_MOVE;
if (frameselection)
{
result = frameselection->HandleClick(pos.mResultContent, pos.mContentOffset,
pos.mContentOffsetEnd, mouseDown || me->isShift, PR_FALSE, pos.mPreferLeft);
}
}
else
result = resultFrame->HandleEvent(aPresContext, aEvent, aEventStatus);//else let the frame/container do what it needs
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
CaptureMouse(aPresContext, PR_TRUE);
return result;
}
else
{
/*we have to add this because any frame that overrides nsFrame::HandleEvent for mouse down MUST capture the mouse events!!
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
CaptureMouse(aPresContext, PR_TRUE);*/
return NS_OK; //just stop it
}
}
return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
NS_IMETHODIMP
nsBlockFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
nsresult rv;
switch (aWhichLayer) {
case NS_FRAME_PAINT_LAYER_FOREGROUND:
rv = GetFrameForPointUsing(aPresContext, aPoint, nsnull, NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
if (nsnull != mBullet) {
rv = GetFrameForPointUsing(aPresContext, aPoint, nsLayoutAtoms::bulletList, NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE, aFrame);
}
return rv;
break;
case NS_FRAME_PAINT_LAYER_FLOATERS:
// we painted our floaters before our children, and thus
// we should check floaters within children first
rv = GetFrameForPointUsing(aPresContext, aPoint, nsnull, NS_FRAME_PAINT_LAYER_FLOATERS, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
if (mFloaters.NotEmpty()) {
rv = GetFrameForPointUsing(aPresContext, aPoint,
nsLayoutAtoms::floaterList,
NS_FRAME_PAINT_LAYER_FOREGROUND,
PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
rv = GetFrameForPointUsing(aPresContext, aPoint,
nsLayoutAtoms::floaterList,
NS_FRAME_PAINT_LAYER_FLOATERS,
PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
return GetFrameForPointUsing(aPresContext, aPoint,
nsLayoutAtoms::floaterList,
NS_FRAME_PAINT_LAYER_BACKGROUND,
PR_FALSE, aFrame);
} else {
return NS_ERROR_FAILURE;
}
break;
case NS_FRAME_PAINT_LAYER_BACKGROUND:
// we're a block, so PR_TRUE for consider self
return GetFrameForPointUsing(aPresContext, aPoint, nsnull,
NS_FRAME_PAINT_LAYER_BACKGROUND,
PR_TRUE, aFrame);
break;
}
// we shouldn't get here
NS_ASSERTION(PR_FALSE, "aWhichLayer was not understood");
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsBlockFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild)
{
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": ReflowDirtyChild (");
if (aChild)
nsFrame::ListTag(stdout, aChild);
else
printf("null");
printf(")\n");
gNoiseIndent++;
}
#endif
if (aChild) {
// See if the child is absolutely positioned
nsFrameState childState;
aChild->GetFrameState(&childState);
if (childState & NS_FRAME_OUT_OF_FLOW) {
const nsStyleDisplay* disp;
aChild->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)disp);
if (disp->IsAbsolutelyPositioned()) {
// Generate a reflow command to reflow our dirty absolutely
// positioned child frames.
// XXX Note that we don't currently try and coalesce the reflow commands,
// although we should. We can't use the NS_FRAME_HAS_DIRTY_CHILDREN
// flag, because that's used to indicate whether in-flow children are
// dirty...
nsIReflowCommand* reflowCmd;
nsresult rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
reflowCmd->SetChildListName(nsLayoutAtoms::absoluteList);
aPresShell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
printf("scheduled reflow command for absolutely positioned frame\n");
--gNoiseIndent;
}
#endif
return rv;
}
}
// Mark the line containing the child frame dirty.
PRBool isFloater;
line_iterator fline;
FindLineFor(aChild, &isFloater, &fline);
if (!isFloater) {
if (fline != end_lines())
MarkLineDirty(fline);
}
else {
// XXXldb Could we do this more efficiently?
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
line->MarkDirty();
}
}
}
// Either generate a reflow command to reflow the dirty child or
// coalesce this reflow request with an existing reflow command
if (!(mState & NS_FRAME_HAS_DIRTY_CHILDREN)) {
// If this is the first dirty child,
// post a dirty children reflow command targeted at yourself
mState |= NS_FRAME_HAS_DIRTY_CHILDREN;
nsFrame::CreateAndPostReflowCommand(aPresShell, this,
nsIReflowCommand::ReflowDirty, nsnull, nsnull, nsnull);
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
printf("scheduled reflow command targeted at self\n");
}
#endif
}
else {
if (!(mState & NS_FRAME_IS_DIRTY)) {
// Mark yourself as dirty
mState |= NS_FRAME_IS_DIRTY;
// Cancel the dirty children reflow command you posted earlier
nsIReflowCommand::ReflowType type = nsIReflowCommand::ReflowDirty;
aPresShell->CancelReflowCommand(this, &type);
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
printf("cancelled reflow targeted at self\n");
}
#endif
// Pass up the reflow request to the parent frame.
mParent->ReflowDirtyChild(aPresShell, this);
}
}
#ifdef DEBUG
if (gNoisyReflow) {
--gNoiseIndent;
}
#endif
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Debugging
#ifdef NS_DEBUG
static PRBool
InLineList(nsLineList& aLines, nsIFrame* aFrame)
{
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
line != line_end;
++line) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(&frame);
}
}
return PR_FALSE;
}
static PRBool
InSiblingList(nsLineList& aLines, nsIFrame* aFrame)
{
if (! aLines.empty()) {
nsIFrame* frame = aLines.front()->mFirstChild;
while (nsnull != frame) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(&frame);
}
}
return PR_FALSE;
}
PRBool
nsBlockFrame::IsChild(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
nsIFrame* parent;
aFrame->GetParent(&parent);
if (parent != (nsIFrame*)this) {
return PR_FALSE;
}
if (InLineList(mLines, aFrame) && InSiblingList(mLines, aFrame)) {
return PR_TRUE;
}
nsLineList* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
if (InLineList(*overflowLines, aFrame) && InSiblingList(*overflowLines, aFrame)) {
return PR_TRUE;
}
return PR_FALSE;
}
NS_IMETHODIMP
nsBlockFrame::VerifyTree() const
{
// XXX rewrite this
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aHandler || !aResult) {
return NS_ERROR_NULL_POINTER;
}
PRUint32 sum = sizeof(*this);
// Add in size of each line object
for (const_line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
PRUint32 lineBoxSize;
nsIAtom* atom = line->SizeOf(aHandler, &lineBoxSize);
aHandler->AddSize(atom, lineBoxSize);
}
*aResult = sum;
return NS_OK;
}
#endif
//----------------------------------------------------------------------
NS_IMETHODIMP
nsBlockFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
if (aPrevInFlow) {
// Copy over the block/area frame type flags
nsBlockFrame* blockFrame = (nsBlockFrame*)aPrevInFlow;
SetFlags(blockFrame->mState & NS_BLOCK_FLAGS_MASK);
}
nsresult rv = nsBlockFrameSuper::Init(aPresContext, aContent, aParent,
aContext, aPrevInFlow);
return rv;
}
nsIStyleContext*
nsBlockFrame::GetFirstLetterStyle(nsIPresContext* aPresContext)
{
// This check is here because nsComboboxControlFrame creates
// nsBlockFrame objects that have an |mContent| pointing to a text
// node. This check ensures we don't try to do selector matching on
// that text node.
//
// XXX This check should go away once we fix nsComboboxControlFrame.
//
if (!mContent->IsContentOfType(nsIContent::eELEMENT))
return nsnull;
nsIStyleContext* fls;
aPresContext->ProbePseudoStyleContextFor(mContent,
nsHTMLAtoms::firstLetterPseudo,
mStyleContext, PR_FALSE, &fls);
return fls;
}
NS_IMETHODIMP
nsBlockFrame::SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = NS_OK;
if (nsLayoutAtoms::absoluteList == aListName) {
mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
mFloaters.SetFrames(aChildList);
}
else {
// Lookup up the two pseudo style contexts
if (nsnull == mPrevInFlow) {
nsIStyleContext* firstLetterStyle = GetFirstLetterStyle(aPresContext);
if (nsnull != firstLetterStyle) {
mState |= NS_BLOCK_HAS_FIRST_LETTER_STYLE;
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": first-letter style found\n");
#endif
NS_RELEASE(firstLetterStyle);
}
}
rv = AddFrames(aPresContext, aChildList, nsnull);
if (NS_FAILED(rv)) {
return rv;
}
// Create list bullet if this is a list-item. Note that this is done
// here so that RenumberLists will work (it needs the bullets to
// store the bullet numbers).
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
if ((nsnull == mPrevInFlow) &&
(NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) &&
(nsnull == mBullet)) {
// Resolve style for the bullet frame
nsIStyleContext* kidSC;
aPresContext->ResolvePseudoStyleContextFor(mContent,
nsHTMLAtoms::mozListBulletPseudo,
mStyleContext, PR_FALSE, &kidSC);
// Create bullet frame
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
mBullet = new (shell.get()) nsBulletFrame;
if (nsnull == mBullet) {
NS_RELEASE(kidSC);
return NS_ERROR_OUT_OF_MEMORY;
}
mBullet->Init(aPresContext, mContent, this, kidSC, nsnull);
NS_RELEASE(kidSC);
// If the list bullet frame should be positioned inside then add
// it to the flow now.
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE ==
styleList->mListStylePosition) {
AddFrames(aPresContext, mBullet, nsnull);
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
else {
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
}
}
return NS_OK;
}
PRBool
nsBlockFrame::FrameStartsCounterScope(nsIFrame* aFrame)
{
const nsStyleContent* styleContent;
aFrame->GetStyleData(eStyleStruct_Content,
(const nsStyleStruct*&) styleContent);
if (0 != styleContent->CounterResetCount()) {
// Winner
return PR_TRUE;
}
return PR_FALSE;
}
void
nsBlockFrame::RenumberLists(nsIPresContext* aPresContext)
{
if (!FrameStartsCounterScope(this)) {
// If this frame doesn't start a counter scope then we don't need
// to renumber child list items.
return;
}
// Setup initial list ordinal value
// XXX Map html's start property to counter-reset style
PRInt32 ordinal = 1;
nsIHTMLContent* hc;
if (mContent && (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc))) {
nsHTMLValue value;
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetHTMLAttribute(nsHTMLAtoms::start, value)) {
if (eHTMLUnit_Integer == value.GetUnit()) {
ordinal = value.GetIntValue();
if (ordinal <= 0) {
ordinal = 1;
}
}
}
NS_RELEASE(hc);
}
// Get to first-in-flow
nsBlockFrame* block = (nsBlockFrame*) GetFirstInFlow();
RenumberListsInBlock(aPresContext, block, &ordinal, 0);
}
PRBool
nsBlockFrame::RenumberListsInBlock(nsIPresContext* aPresContext,
nsBlockFrame* aBlockFrame,
PRInt32* aOrdinal,
PRInt32 aDepth)
{
PRBool renumberedABullet = PR_FALSE;
while (nsnull != aBlockFrame) {
// Examine each line in the block
for (line_iterator line = aBlockFrame->begin_lines(),
line_end = aBlockFrame->end_lines();
line != line_end;
++line) {
nsIFrame* kid = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
PRBool kidRenumberedABullet = RenumberListsFor(aPresContext, kid, aOrdinal, aDepth);
if (kidRenumberedABullet) {
line->MarkDirty();
renumberedABullet = PR_TRUE;
}
kid->GetNextSibling(&kid);
}
}
// Advance to the next continuation
aBlockFrame->GetNextInFlow((nsIFrame**) &aBlockFrame);
}
return renumberedABullet;
}
PRBool
nsBlockFrame::RenumberListsFor(nsIPresContext* aPresContext,
nsIFrame* aKid,
PRInt32* aOrdinal,
PRInt32 aDepth)
{
NS_PRECONDITION(aPresContext && aKid && aOrdinal, "null params are immoral!");
// add in a sanity check for absurdly deep frame trees. See bug 42138
if (MAX_DEPTH_FOR_LIST_RENUMBERING < aDepth)
return PR_FALSE;
PRBool kidRenumberedABullet = PR_FALSE;
nsIFrame* kid = aKid;
// if the frame is a placeholder, then get the out of flow frame
nsCOMPtr<nsIAtom> frameType;
aKid->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::placeholderFrame == frameType.get()) {
kid = NS_STATIC_CAST(nsPlaceholderFrame*, aKid)->GetOutOfFlowFrame();
NS_ASSERTION(kid, "no out-of-flow frame");
}
// If the frame is a list-item and the frame implements our
// block frame API then get its bullet and set the list item
// ordinal.
const nsStyleDisplay* display;
kid->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
// Make certain that the frame is a block frame in case
// something foreign has crept in.
nsBlockFrame* listItem;
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**)&listItem);
if (NS_SUCCEEDED(rv)) {
if (nsnull != listItem->mBullet) {
PRBool changed;
*aOrdinal = listItem->mBullet->SetListItemOrdinal(*aOrdinal,
&changed);
if (changed) {
kidRenumberedABullet = PR_TRUE;
}
}
// XXX temporary? if the list-item has child list-items they
// should be numbered too; especially since the list-item is
// itself (ASSUMED!) not to be a counter-resetter.
PRBool meToo = RenumberListsInBlock(aPresContext, listItem, aOrdinal, aDepth + 1);
if (meToo) {
kidRenumberedABullet = PR_TRUE;
}
}
}
else if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
if (FrameStartsCounterScope(kid)) {
// Don't bother recursing into a block frame that is a new
// counter scope. Any list-items in there will be handled by
// it.
}
else {
// If the display=block element is a block frame then go ahead
// and recurse into it, as it might have child list-items.
nsBlockFrame* kidBlock;
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**) &kidBlock);
if (NS_SUCCEEDED(rv)) {
kidRenumberedABullet = RenumberListsInBlock(aPresContext, kidBlock, aOrdinal, aDepth + 1);
}
}
}
return kidRenumberedABullet;
}
void
nsBlockFrame::ReflowBullet(nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
// Reflow the bullet now
nsSize availSize;
availSize.width = NS_UNCONSTRAINEDSIZE;
availSize.height = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
mBullet, availSize);
nsReflowStatus status;
mBullet->WillReflow(aState.mPresContext);
mBullet->Reflow(aState.mPresContext, aMetrics, reflowState, status);
#ifdef IBMBIDI
const nsStyleVisibility* vis;
GetStyleData(eStyleStruct_Visibility, (const nsStyleStruct*&)vis);
#endif // IBMBIDI
// Place the bullet now; use its right margin to distance it
// from the rest of the frames in the line
nscoord x =
#ifdef IBMBIDI
// For direction RTL: set x to the right margin for now.
// This value will be used to indent the bullet from the right most
// egde of the previous frame in nsLineLayout::HorizontalAlignFrames.
(NS_STYLE_DIRECTION_RTL == vis->mDirection)
? reflowState.mComputedMargin.right :
#endif // IBMBIDI
- reflowState.mComputedMargin.right - aMetrics.width;
// Approximate the bullets position; vertical alignment will provide
// the final vertical location.
const nsMargin& bp = aState.BorderPadding();
nscoord y = bp.top;
mBullet->SetRect(aState.mPresContext, nsRect(x, y, aMetrics.width, aMetrics.height));
mBullet->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
}
//XXX get rid of this -- its slow
void
nsBlockFrame::BuildFloaterList()
{
nsIFrame* head = nsnull;
nsIFrame* current = nsnull;
for (line_iterator line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
if (nsnull == head) {
current = head = floater;
}
else {
current->SetNextSibling(floater);
current = floater;
}
fc = fc->Next();
}
}
}
// Terminate end of floater list just in case a floater was removed
if (nsnull != current) {
current->SetNextSibling(nsnull);
}
mFloaters.SetFrames(head);
}
// XXX keep the text-run data in the first-in-flow of the block
#ifdef DEBUG
void
nsBlockFrame::VerifyLines(PRBool aFinalCheckOK)
{
if (!gVerifyLines) {
return;
}
if (mLines.empty()) {
return;
}
// Add up the counts on each line. Also validate that IsFirstLine is
// set properly.
PRInt32 count = 0;
PRBool seenBlock = PR_FALSE;
line_iterator line, line_end;
for (line = begin_lines(), line_end = end_lines();
line != line_end;
++line) {
if (aFinalCheckOK) {
NS_ABORT_IF_FALSE(line->GetChildCount(), "empty line");
if (line->IsBlock()) {
seenBlock = PR_TRUE;
}
if (line->IsBlock()) {
NS_ASSERTION(1 == line->GetChildCount(), "bad first line");
}
}
count += line->GetChildCount();
}
// Then count the frames
PRInt32 frameCount = 0;
nsIFrame* frame = mLines.front()->mFirstChild;
while (nsnull != frame) {
frameCount++;
frame->GetNextSibling(&frame);
}
NS_ASSERTION(count == frameCount, "bad line list");
// Next: test that each line has right number of frames on it
for (line = begin_lines(), line_end = end_lines();
line != line_end;
) {
count = line->GetChildCount();
frame = line->mFirstChild;
while (--count >= 0) {
frame->GetNextSibling(&frame);
}
++line;
if ((line != line_end) && (0 != line->GetChildCount())) {
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
}
}
}
// Its possible that a frame can have some frames on an overflow
// list. But its never possible for multiple frames to have overflow
// lists. Check that this fact is actually true.
void
nsBlockFrame::VerifyOverflowSituation(nsIPresContext* aPresContext)
{
nsBlockFrame* flow = (nsBlockFrame*) GetFirstInFlow();
while (nsnull != flow) {
nsLineList* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
if (nsnull != overflowLines) {
NS_ASSERTION(! overflowLines->empty(), "should not be empty if present");
NS_ASSERTION(overflowLines->front()->mFirstChild, "bad overflow list");
}
flow = (nsBlockFrame*) flow->mNextInFlow;
}
}
PRInt32
nsBlockFrame::GetDepth() const
{
PRInt32 depth = 0;
nsIFrame* parent = mParent;
while (nsnull != parent) {
parent->GetParent(&parent);
depth++;
}
return depth;
}
#endif
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