2009-01-05 03:39:54 +03:00
|
|
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
|
|
*
|
|
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
|
|
*
|
|
|
|
* 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.org 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):
|
|
|
|
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
|
|
|
|
*
|
|
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
|
|
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
|
|
|
|
*
|
|
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
|
|
|
|
/* class that manages rules for positioning floats */
|
|
|
|
|
|
|
|
#include "nsFloatManager.h"
|
|
|
|
#include "nsIPresShell.h"
|
|
|
|
#include "nsMemory.h"
|
|
|
|
#include "nsHTMLReflowState.h"
|
|
|
|
#include "nsBlockDebugFlags.h"
|
2009-07-15 09:19:31 +04:00
|
|
|
#include "nsContentErrors.h"
|
2009-01-05 03:39:54 +03:00
|
|
|
|
2010-03-29 05:46:55 +04:00
|
|
|
using namespace mozilla;
|
|
|
|
|
2009-01-05 03:39:54 +03:00
|
|
|
PRInt32 nsFloatManager::sCachedFloatManagerCount = 0;
|
|
|
|
void* nsFloatManager::sCachedFloatManagers[NS_FLOAT_MANAGER_CACHE_SIZE];
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
|
|
// PresShell Arena allocate callback (for nsIntervalSet use below)
|
|
|
|
static void*
|
|
|
|
PSArenaAllocCB(size_t aSize, void* aClosure)
|
|
|
|
{
|
2009-08-18 07:21:06 +04:00
|
|
|
return static_cast<nsIPresShell*>(aClosure)->AllocateMisc(aSize);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
// PresShell Arena free callback (for nsIntervalSet use below)
|
|
|
|
static void
|
|
|
|
PSArenaFreeCB(size_t aSize, void* aPtr, void* aClosure)
|
|
|
|
{
|
2009-08-18 07:21:06 +04:00
|
|
|
static_cast<nsIPresShell*>(aClosure)->FreeMisc(aSize, aPtr);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// nsFloatManager
|
|
|
|
|
|
|
|
nsFloatManager::nsFloatManager(nsIPresShell* aPresShell)
|
|
|
|
: mX(0), mY(0),
|
2010-08-06 08:59:19 +04:00
|
|
|
mFloatDamage(PSArenaAllocCB, PSArenaFreeCB, aPresShell),
|
2011-10-17 18:59:28 +04:00
|
|
|
mPushedLeftFloatPastBreak(false),
|
|
|
|
mPushedRightFloatPastBreak(false),
|
|
|
|
mSplitLeftFloatAcrossBreak(false),
|
|
|
|
mSplitRightFloatAcrossBreak(false)
|
2009-01-05 03:39:54 +03:00
|
|
|
{
|
|
|
|
MOZ_COUNT_CTOR(nsFloatManager);
|
|
|
|
}
|
|
|
|
|
|
|
|
nsFloatManager::~nsFloatManager()
|
|
|
|
{
|
|
|
|
MOZ_COUNT_DTOR(nsFloatManager);
|
|
|
|
}
|
|
|
|
|
|
|
|
// static
|
|
|
|
void* nsFloatManager::operator new(size_t aSize) CPP_THROW_NEW
|
|
|
|
{
|
|
|
|
if (sCachedFloatManagerCount > 0) {
|
|
|
|
// We have cached unused instances of this class, return a cached
|
|
|
|
// instance in stead of always creating a new one.
|
|
|
|
return sCachedFloatManagers[--sCachedFloatManagerCount];
|
|
|
|
}
|
|
|
|
|
|
|
|
// The cache is empty, this means we haveto create a new instance using
|
|
|
|
// the global |operator new|.
|
|
|
|
return nsMemory::Alloc(aSize);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nsFloatManager::operator delete(void* aPtr, size_t aSize)
|
|
|
|
{
|
|
|
|
if (!aPtr)
|
|
|
|
return;
|
|
|
|
// This float manager is no longer used, if there's still room in
|
|
|
|
// the cache we'll cache this float manager, unless the layout
|
|
|
|
// module was already shut down.
|
|
|
|
|
|
|
|
if (sCachedFloatManagerCount < NS_FLOAT_MANAGER_CACHE_SIZE &&
|
|
|
|
sCachedFloatManagerCount >= 0) {
|
|
|
|
// There's still space in the cache for more instances, put this
|
|
|
|
// instance in the cache in stead of deleting it.
|
|
|
|
|
|
|
|
sCachedFloatManagers[sCachedFloatManagerCount++] = aPtr;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
// The cache is full, or the layout module has been shut down,
|
|
|
|
// delete this float manager.
|
|
|
|
nsMemory::Free(aPtr);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* static */
|
|
|
|
void nsFloatManager::Shutdown()
|
|
|
|
{
|
|
|
|
// The layout module is being shut down, clean up the cache and
|
|
|
|
// disable further caching.
|
|
|
|
|
|
|
|
PRInt32 i;
|
|
|
|
|
|
|
|
for (i = 0; i < sCachedFloatManagerCount; i++) {
|
|
|
|
void* floatManager = sCachedFloatManagers[i];
|
|
|
|
if (floatManager)
|
|
|
|
nsMemory::Free(floatManager);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Disable further caching.
|
|
|
|
sCachedFloatManagerCount = -1;
|
|
|
|
}
|
|
|
|
|
2009-04-09 00:52:37 +04:00
|
|
|
nsFlowAreaRect
|
2009-05-20 15:21:34 +04:00
|
|
|
nsFloatManager::GetFlowArea(nscoord aYOffset, BandInfoType aInfoType,
|
2010-08-11 23:32:53 +04:00
|
|
|
nscoord aHeight, nsRect aContentArea,
|
2009-05-20 15:21:34 +04:00
|
|
|
SavedState* aState) const
|
2009-01-05 03:39:54 +03:00
|
|
|
{
|
2009-05-20 15:21:34 +04:00
|
|
|
NS_ASSERTION(aHeight >= 0, "unexpected max height");
|
2010-08-11 23:32:53 +04:00
|
|
|
NS_ASSERTION(aContentArea.width >= 0, "unexpected content area width");
|
2009-01-05 03:39:54 +03:00
|
|
|
|
|
|
|
nscoord top = aYOffset + mY;
|
|
|
|
if (top < nscoord_MIN) {
|
2009-01-07 02:21:00 +03:00
|
|
|
NS_WARNING("bad value");
|
2009-01-05 03:39:54 +03:00
|
|
|
top = nscoord_MIN;
|
|
|
|
}
|
|
|
|
|
2009-04-09 00:52:36 +04:00
|
|
|
// Determine the last float that we should consider.
|
|
|
|
PRUint32 floatCount;
|
|
|
|
if (aState) {
|
|
|
|
// Use the provided state.
|
|
|
|
floatCount = aState->mFloatInfoCount;
|
|
|
|
NS_ABORT_IF_FALSE(floatCount <= mFloats.Length(), "bad state");
|
|
|
|
} else {
|
|
|
|
// Use our current state.
|
|
|
|
floatCount = mFloats.Length();
|
|
|
|
}
|
|
|
|
|
2009-01-05 03:39:54 +03:00
|
|
|
// If there are no floats at all, or we're below the last one, return
|
|
|
|
// quickly.
|
|
|
|
if (floatCount == 0 ||
|
|
|
|
(mFloats[floatCount-1].mLeftYMost <= top &&
|
|
|
|
mFloats[floatCount-1].mRightYMost <= top)) {
|
2010-08-11 23:32:53 +04:00
|
|
|
return nsFlowAreaRect(aContentArea.x, aYOffset, aContentArea.width,
|
2011-10-17 18:59:28 +04:00
|
|
|
aHeight, false);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
nscoord bottom;
|
2009-05-20 15:21:34 +04:00
|
|
|
if (aHeight == nscoord_MAX) {
|
2009-07-09 05:10:29 +04:00
|
|
|
// This warning (and the two below) are possible to hit on pages
|
|
|
|
// with really large objects.
|
|
|
|
NS_WARN_IF_FALSE(aInfoType == BAND_FROM_POINT,
|
|
|
|
"bad height");
|
2009-01-05 03:39:54 +03:00
|
|
|
bottom = nscoord_MAX;
|
|
|
|
} else {
|
2009-05-20 15:21:34 +04:00
|
|
|
bottom = top + aHeight;
|
2009-01-05 03:39:54 +03:00
|
|
|
if (bottom < top || bottom > nscoord_MAX) {
|
2009-01-07 02:21:00 +03:00
|
|
|
NS_WARNING("bad value");
|
2009-01-05 03:39:54 +03:00
|
|
|
bottom = nscoord_MAX;
|
|
|
|
}
|
|
|
|
}
|
2010-08-11 23:32:53 +04:00
|
|
|
nscoord left = mX + aContentArea.x;
|
|
|
|
nscoord right = mX + aContentArea.XMost();
|
2009-01-05 03:39:54 +03:00
|
|
|
if (right < left) {
|
2009-01-07 02:21:00 +03:00
|
|
|
NS_WARNING("bad value");
|
2009-01-05 03:39:54 +03:00
|
|
|
right = left;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Walk backwards through the floats until we either hit the front of
|
|
|
|
// the list or we're above |top|.
|
2011-09-29 10:19:26 +04:00
|
|
|
bool haveFloats = false;
|
2009-04-09 00:52:36 +04:00
|
|
|
for (PRUint32 i = floatCount; i > 0; --i) {
|
2009-01-05 03:39:54 +03:00
|
|
|
const FloatInfo &fi = mFloats[i-1];
|
|
|
|
if (fi.mLeftYMost <= top && fi.mRightYMost <= top) {
|
|
|
|
// There aren't any more floats that could intersect this band.
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (fi.mRect.IsEmpty()) {
|
|
|
|
// For compatibility, ignore floats with empty rects, even though it
|
|
|
|
// disagrees with the spec. (We might want to fix this in the
|
|
|
|
// future, though.)
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
nscoord floatTop = fi.mRect.y, floatBottom = fi.mRect.YMost();
|
2009-05-20 15:21:34 +04:00
|
|
|
if (top < floatTop && aInfoType == BAND_FROM_POINT) {
|
2009-01-05 03:39:54 +03:00
|
|
|
// This float is below our band. Shrink our band's height if needed.
|
|
|
|
if (floatTop < bottom) {
|
|
|
|
bottom = floatTop;
|
|
|
|
}
|
2009-05-20 15:21:34 +04:00
|
|
|
}
|
|
|
|
// If top == bottom (which happens only with WIDTH_WITHIN_HEIGHT),
|
|
|
|
// we include floats that begin at our 0-height vertical area. We
|
|
|
|
// need to to this to satisfy the invariant that a
|
|
|
|
// WIDTH_WITHIN_HEIGHT call is at least as narrow on both sides as a
|
|
|
|
// BAND_WITHIN_POINT call beginning at its top.
|
|
|
|
else if (top < floatBottom &&
|
|
|
|
(floatTop < bottom || (floatTop == bottom && top == bottom))) {
|
2009-01-05 03:39:54 +03:00
|
|
|
// This float is in our band.
|
|
|
|
|
|
|
|
// Shrink our band's height if needed.
|
2009-05-20 15:21:34 +04:00
|
|
|
if (floatBottom < bottom && aInfoType == BAND_FROM_POINT) {
|
2009-01-05 03:39:54 +03:00
|
|
|
bottom = floatBottom;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Shrink our band's width if needed.
|
|
|
|
if (fi.mFrame->GetStyleDisplay()->mFloats == NS_STYLE_FLOAT_LEFT) {
|
|
|
|
// A left float.
|
|
|
|
nscoord rightEdge = fi.mRect.XMost();
|
|
|
|
if (rightEdge > left) {
|
|
|
|
left = rightEdge;
|
2009-01-07 02:21:00 +03:00
|
|
|
// Only set haveFloats to true if the float is inside our
|
|
|
|
// containing block. This matches the spec for what some
|
|
|
|
// callers want and disagrees for other callers, so we should
|
|
|
|
// probably provide better information at some point.
|
2011-10-17 18:59:28 +04:00
|
|
|
haveFloats = true;
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// A right float.
|
|
|
|
nscoord leftEdge = fi.mRect.x;
|
|
|
|
if (leftEdge < right) {
|
|
|
|
right = leftEdge;
|
2009-01-07 02:21:00 +03:00
|
|
|
// See above.
|
2011-10-17 18:59:28 +04:00
|
|
|
haveFloats = true;
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
nscoord height = (bottom == nscoord_MAX) ? nscoord_MAX : (bottom - top);
|
2009-04-09 00:52:37 +04:00
|
|
|
return nsFlowAreaRect(left - mX, top - mY, right - left, height, haveFloats);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
nsresult
|
|
|
|
nsFloatManager::AddFloat(nsIFrame* aFloatFrame, const nsRect& aMarginRect)
|
|
|
|
{
|
|
|
|
NS_ASSERTION(aMarginRect.width >= 0, "negative width!");
|
|
|
|
NS_ASSERTION(aMarginRect.height >= 0, "negative height!");
|
|
|
|
|
|
|
|
FloatInfo info(aFloatFrame, aMarginRect + nsPoint(mX, mY));
|
|
|
|
|
|
|
|
// Set mLeftYMost and mRightYMost.
|
|
|
|
if (HasAnyFloats()) {
|
|
|
|
FloatInfo &tail = mFloats[mFloats.Length() - 1];
|
|
|
|
info.mLeftYMost = tail.mLeftYMost;
|
|
|
|
info.mRightYMost = tail.mRightYMost;
|
|
|
|
} else {
|
|
|
|
info.mLeftYMost = nscoord_MIN;
|
|
|
|
info.mRightYMost = nscoord_MIN;
|
|
|
|
}
|
|
|
|
PRUint8 floatStyle = aFloatFrame->GetStyleDisplay()->mFloats;
|
|
|
|
NS_ASSERTION(floatStyle == NS_STYLE_FLOAT_LEFT ||
|
|
|
|
floatStyle == NS_STYLE_FLOAT_RIGHT, "unexpected float");
|
|
|
|
nscoord& sideYMost = (floatStyle == NS_STYLE_FLOAT_LEFT) ? info.mLeftYMost
|
|
|
|
: info.mRightYMost;
|
|
|
|
nscoord thisYMost = info.mRect.YMost();
|
|
|
|
if (thisYMost > sideYMost)
|
|
|
|
sideYMost = thisYMost;
|
|
|
|
|
|
|
|
if (!mFloats.AppendElement(info))
|
|
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
2009-07-15 09:19:31 +04:00
|
|
|
nsRect
|
|
|
|
nsFloatManager::CalculateRegionFor(nsIFrame* aFloat,
|
|
|
|
const nsMargin& aMargin)
|
|
|
|
{
|
|
|
|
nsRect region = aFloat->GetRect();
|
|
|
|
|
|
|
|
// Float region includes its margin
|
|
|
|
region.Inflate(aMargin);
|
|
|
|
|
|
|
|
// If the element is relatively positioned, then adjust x and y
|
|
|
|
// accordingly so that we consider relatively positioned frames
|
|
|
|
// at their original position.
|
|
|
|
const nsStyleDisplay* display = aFloat->GetStyleDisplay();
|
|
|
|
region -= aFloat->GetRelativeOffset(display);
|
|
|
|
|
|
|
|
// Don't store rectangles with negative margin-box width or height in
|
|
|
|
// the float manager; it can't deal with them.
|
|
|
|
if (region.width < 0) {
|
|
|
|
// Preserve the right margin-edge for left floats and the left
|
|
|
|
// margin-edge for right floats
|
|
|
|
if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
|
|
|
|
region.x = region.XMost();
|
|
|
|
}
|
|
|
|
region.width = 0;
|
|
|
|
}
|
|
|
|
if (region.height < 0) {
|
|
|
|
region.height = 0;
|
|
|
|
}
|
|
|
|
return region;
|
|
|
|
}
|
|
|
|
|
2010-03-29 05:46:55 +04:00
|
|
|
NS_DECLARE_FRAME_PROPERTY(FloatRegionProperty, nsIFrame::DestroyMargin)
|
|
|
|
|
2009-07-15 09:19:31 +04:00
|
|
|
nsRect
|
|
|
|
nsFloatManager::GetRegionFor(nsIFrame* aFloat)
|
|
|
|
{
|
|
|
|
nsRect region = aFloat->GetRect();
|
2010-03-29 05:46:55 +04:00
|
|
|
void* storedRegion = aFloat->Properties().Get(FloatRegionProperty());
|
2009-07-15 09:19:31 +04:00
|
|
|
if (storedRegion) {
|
|
|
|
nsMargin margin = *static_cast<nsMargin*>(storedRegion);
|
|
|
|
region.Inflate(margin);
|
|
|
|
}
|
|
|
|
return region;
|
|
|
|
}
|
|
|
|
|
2011-05-08 12:00:29 +04:00
|
|
|
void
|
2009-07-15 09:19:31 +04:00
|
|
|
nsFloatManager::StoreRegionFor(nsIFrame* aFloat,
|
|
|
|
nsRect& aRegion)
|
|
|
|
{
|
|
|
|
nsRect rect = aFloat->GetRect();
|
2010-03-29 05:46:55 +04:00
|
|
|
FrameProperties props = aFloat->Properties();
|
2011-04-19 07:07:23 +04:00
|
|
|
if (aRegion.IsEqualEdges(rect)) {
|
2010-03-29 05:46:55 +04:00
|
|
|
props.Delete(FloatRegionProperty());
|
2009-07-15 09:19:31 +04:00
|
|
|
}
|
|
|
|
else {
|
2010-03-29 05:46:55 +04:00
|
|
|
nsMargin* storedMargin = static_cast<nsMargin*>
|
|
|
|
(props.Get(FloatRegionProperty()));
|
2009-07-15 09:19:31 +04:00
|
|
|
if (!storedMargin) {
|
|
|
|
storedMargin = new nsMargin();
|
2010-03-29 05:46:55 +04:00
|
|
|
props.Set(FloatRegionProperty(), storedMargin);
|
2009-07-15 09:19:31 +04:00
|
|
|
}
|
|
|
|
*storedMargin = aRegion - rect;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-01-05 03:39:54 +03:00
|
|
|
nsresult
|
|
|
|
nsFloatManager::RemoveTrailingRegions(nsIFrame* aFrameList)
|
|
|
|
{
|
|
|
|
if (!aFrameList) {
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
// This could be a good bit simpler if we could guarantee that the
|
|
|
|
// floats given were at the end of our list, so we could just search
|
|
|
|
// for the head of aFrameList. (But we can't;
|
|
|
|
// layout/reftests/bugs/421710-1.html crashes.)
|
2011-11-09 00:24:37 +04:00
|
|
|
nsTHashtable<nsPtrHashKey<nsIFrame> > frameSet;
|
2009-01-05 03:39:54 +03:00
|
|
|
|
|
|
|
frameSet.Init(1);
|
|
|
|
for (nsIFrame* f = aFrameList; f; f = f->GetNextSibling()) {
|
2011-11-09 00:24:37 +04:00
|
|
|
frameSet.PutEntry(f);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
PRUint32 newLength = mFloats.Length();
|
|
|
|
while (newLength > 0) {
|
|
|
|
if (!frameSet.Contains(mFloats[newLength - 1].mFrame)) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
--newLength;
|
|
|
|
}
|
2009-01-07 02:21:00 +03:00
|
|
|
mFloats.TruncateLength(newLength);
|
2009-01-05 03:39:54 +03:00
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
for (PRUint32 i = 0; i < mFloats.Length(); ++i) {
|
|
|
|
NS_ASSERTION(!frameSet.Contains(mFloats[i].mFrame),
|
|
|
|
"Frame region deletion was requested but we couldn't delete it");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nsFloatManager::PushState(SavedState* aState)
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(aState, "Need a place to save state");
|
|
|
|
|
|
|
|
// This is a cheap push implementation, which
|
|
|
|
// only saves the (x,y) and last frame in the mFrameInfoMap
|
|
|
|
// which is enough info to get us back to where we should be
|
|
|
|
// when pop is called.
|
|
|
|
//
|
|
|
|
// This push/pop mechanism is used to undo any
|
|
|
|
// floats that were added during the unconstrained reflow
|
|
|
|
// in nsBlockReflowContext::DoReflowBlock(). (See bug 96736)
|
|
|
|
//
|
|
|
|
// It should also be noted that the state for mFloatDamage is
|
|
|
|
// intentionally not saved or restored in PushState() and PopState(),
|
|
|
|
// since that could lead to bugs where damage is missed/dropped when
|
|
|
|
// we move from position A to B (during the intermediate incremental
|
|
|
|
// reflow mentioned above) and then from B to C during the subsequent
|
|
|
|
// reflow. In the typical case A and C will be the same, but not always.
|
|
|
|
// Allowing mFloatDamage to accumulate the damage incurred during both
|
|
|
|
// reflows ensures that nothing gets missed.
|
|
|
|
aState->mX = mX;
|
|
|
|
aState->mY = mY;
|
2010-08-06 08:59:19 +04:00
|
|
|
aState->mPushedLeftFloatPastBreak = mPushedLeftFloatPastBreak;
|
|
|
|
aState->mPushedRightFloatPastBreak = mPushedRightFloatPastBreak;
|
2010-08-06 08:59:19 +04:00
|
|
|
aState->mSplitLeftFloatAcrossBreak = mSplitLeftFloatAcrossBreak;
|
|
|
|
aState->mSplitRightFloatAcrossBreak = mSplitRightFloatAcrossBreak;
|
2009-01-05 03:39:54 +03:00
|
|
|
aState->mFloatInfoCount = mFloats.Length();
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nsFloatManager::PopState(SavedState* aState)
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(aState, "No state to restore?");
|
|
|
|
|
|
|
|
mX = aState->mX;
|
|
|
|
mY = aState->mY;
|
2010-08-06 08:59:19 +04:00
|
|
|
mPushedLeftFloatPastBreak = aState->mPushedLeftFloatPastBreak;
|
|
|
|
mPushedRightFloatPastBreak = aState->mPushedRightFloatPastBreak;
|
2010-08-06 08:59:19 +04:00
|
|
|
mSplitLeftFloatAcrossBreak = aState->mSplitLeftFloatAcrossBreak;
|
|
|
|
mSplitRightFloatAcrossBreak = aState->mSplitRightFloatAcrossBreak;
|
2009-01-05 03:39:54 +03:00
|
|
|
|
|
|
|
NS_ASSERTION(aState->mFloatInfoCount <= mFloats.Length(),
|
|
|
|
"somebody misused PushState/PopState");
|
2009-01-07 02:21:00 +03:00
|
|
|
mFloats.TruncateLength(aState->mFloatInfoCount);
|
2009-01-05 03:39:54 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
nscoord
|
|
|
|
nsFloatManager::GetLowestFloatTop() const
|
|
|
|
{
|
2010-08-06 08:59:19 +04:00
|
|
|
if (mPushedLeftFloatPastBreak || mPushedRightFloatPastBreak) {
|
|
|
|
return nscoord_MAX;
|
|
|
|
}
|
2009-01-05 03:39:54 +03:00
|
|
|
if (!HasAnyFloats()) {
|
|
|
|
return nscoord_MIN;
|
|
|
|
}
|
|
|
|
return mFloats[mFloats.Length() - 1].mRect.y - mY;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
void
|
|
|
|
DebugListFloatManager(const nsFloatManager *aFloatManager)
|
|
|
|
{
|
|
|
|
aFloatManager->List(stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
nsresult
|
|
|
|
nsFloatManager::List(FILE* out) const
|
|
|
|
{
|
|
|
|
if (!HasAnyFloats())
|
|
|
|
return NS_OK;
|
|
|
|
|
|
|
|
for (PRUint32 i = 0; i < mFloats.Length(); ++i) {
|
|
|
|
const FloatInfo &fi = mFloats[i];
|
|
|
|
printf("Float %u: frame=%p rect={%d,%d,%d,%d} ymost={l:%d, r:%d}\n",
|
|
|
|
i, static_cast<void*>(fi.mFrame),
|
|
|
|
fi.mRect.x, fi.mRect.y, fi.mRect.width, fi.mRect.height,
|
|
|
|
fi.mLeftYMost, fi.mRightYMost);
|
|
|
|
}
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
nscoord
|
2010-08-06 08:59:19 +04:00
|
|
|
nsFloatManager::ClearFloats(nscoord aY, PRUint8 aBreakType,
|
|
|
|
PRUint32 aFlags) const
|
2009-01-05 03:39:54 +03:00
|
|
|
{
|
2010-08-06 08:59:19 +04:00
|
|
|
if (!(aFlags & DONT_CLEAR_PUSHED_FLOATS) && ClearContinues(aBreakType)) {
|
2010-08-06 08:59:19 +04:00
|
|
|
return nscoord_MAX;
|
|
|
|
}
|
2009-01-05 03:39:54 +03:00
|
|
|
if (!HasAnyFloats()) {
|
|
|
|
return aY;
|
|
|
|
}
|
|
|
|
|
|
|
|
nscoord bottom = aY + mY;
|
|
|
|
|
|
|
|
const FloatInfo &tail = mFloats[mFloats.Length() - 1];
|
|
|
|
switch (aBreakType) {
|
|
|
|
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
|
2009-09-16 19:01:36 +04:00
|
|
|
bottom = NS_MAX(bottom, tail.mLeftYMost);
|
|
|
|
bottom = NS_MAX(bottom, tail.mRightYMost);
|
2009-01-05 03:39:54 +03:00
|
|
|
break;
|
|
|
|
case NS_STYLE_CLEAR_LEFT:
|
2009-09-16 19:01:36 +04:00
|
|
|
bottom = NS_MAX(bottom, tail.mLeftYMost);
|
2009-01-05 03:39:54 +03:00
|
|
|
break;
|
|
|
|
case NS_STYLE_CLEAR_RIGHT:
|
2009-09-16 19:01:36 +04:00
|
|
|
bottom = NS_MAX(bottom, tail.mRightYMost);
|
2009-01-05 03:39:54 +03:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
// Do nothing
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
bottom -= mY;
|
|
|
|
|
|
|
|
return bottom;
|
|
|
|
}
|
|
|
|
|
2011-09-29 10:19:26 +04:00
|
|
|
bool
|
2009-08-31 22:25:36 +04:00
|
|
|
nsFloatManager::ClearContinues(PRUint8 aBreakType) const
|
|
|
|
{
|
2010-08-06 08:59:19 +04:00
|
|
|
return ((mPushedLeftFloatPastBreak || mSplitLeftFloatAcrossBreak) &&
|
|
|
|
(aBreakType == NS_STYLE_CLEAR_LEFT_AND_RIGHT ||
|
|
|
|
aBreakType == NS_STYLE_CLEAR_LEFT)) ||
|
|
|
|
((mPushedRightFloatPastBreak || mSplitRightFloatAcrossBreak) &&
|
|
|
|
(aBreakType == NS_STYLE_CLEAR_LEFT_AND_RIGHT ||
|
|
|
|
aBreakType == NS_STYLE_CLEAR_RIGHT));
|
2009-08-31 22:25:36 +04:00
|
|
|
}
|
|
|
|
|
2009-01-05 03:39:54 +03:00
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// FloatInfo
|
|
|
|
|
|
|
|
nsFloatManager::FloatInfo::FloatInfo(nsIFrame* aFrame, const nsRect& aRect)
|
|
|
|
: mFrame(aFrame), mRect(aRect)
|
|
|
|
{
|
|
|
|
MOZ_COUNT_CTOR(nsFloatManager::FloatInfo);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
2009-01-05 04:25:58 +03:00
|
|
|
nsFloatManager::FloatInfo::FloatInfo(const FloatInfo& aOther)
|
|
|
|
: mFrame(aOther.mFrame),
|
|
|
|
mRect(aOther.mRect),
|
|
|
|
mLeftYMost(aOther.mLeftYMost),
|
|
|
|
mRightYMost(aOther.mRightYMost)
|
|
|
|
{
|
|
|
|
MOZ_COUNT_CTOR(nsFloatManager::FloatInfo);
|
|
|
|
}
|
|
|
|
|
2009-01-05 03:39:54 +03:00
|
|
|
nsFloatManager::FloatInfo::~FloatInfo()
|
|
|
|
{
|
|
|
|
MOZ_COUNT_DTOR(nsFloatManager::FloatInfo);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
|
|
|
|
nsAutoFloatManager::~nsAutoFloatManager()
|
|
|
|
{
|
|
|
|
// Restore the old float manager in the reflow state if necessary.
|
|
|
|
if (mNew) {
|
|
|
|
#ifdef NOISY_FLOATMANAGER
|
|
|
|
printf("restoring old float manager %p\n", mOld);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
mReflowState.mFloatManager = mOld;
|
|
|
|
|
|
|
|
#ifdef NOISY_FLOATMANAGER
|
|
|
|
if (mOld) {
|
|
|
|
static_cast<nsFrame *>(mReflowState.frame)->ListTag(stdout);
|
|
|
|
printf(": space-manager %p after reflow\n", mOld);
|
|
|
|
mOld->List(stdout);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
delete mNew;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
nsresult
|
|
|
|
nsAutoFloatManager::CreateFloatManager(nsPresContext *aPresContext)
|
|
|
|
{
|
|
|
|
// Create a new float manager and install it in the reflow
|
|
|
|
// state. `Remember' the old float manager so we can restore it
|
|
|
|
// later.
|
|
|
|
mNew = new nsFloatManager(aPresContext->PresShell());
|
|
|
|
if (! mNew)
|
|
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
|
|
|
|
#ifdef NOISY_FLOATMANAGER
|
|
|
|
printf("constructed new float manager %p (replacing %p)\n",
|
|
|
|
mNew, mReflowState.mFloatManager);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// Set the float manager in the existing reflow state
|
|
|
|
mOld = mReflowState.mFloatManager;
|
|
|
|
mReflowState.mFloatManager = mNew;
|
|
|
|
return NS_OK;
|
|
|
|
}
|