void
nsLineBox::DeleteLineList(nsPresContext* aPresContext, nsLineList& aLines,
nsIFrame* aDestructRoot, nsFrameList* aFrames)
{
nsIPresShell* shell = aPresContext->PresShell();
// Keep our line list and frame list up to date as we
// remove frames, in case something wants to traverse the
// frame tree while we're destroying.
while (!aLines.empty()) {
nsLineBox* line = aLines.front();
if (MOZ_UNLIKELY(line->mFlags.mHasHashedFrames)) {
line->SwitchToCounter(); // Avoid expensive has table removals.
}
while (line->GetChildCount() > 0) {
nsIFrame* child = aFrames->RemoveFirstChild();
MOZ_ASSERT(child == line->mFirstChild, "Lines out of sync");
line->mFirstChild = aFrames->FirstChild();
line->NoteFrameRemoved(child);
child->DestroyFrom(aDestructRoot);
}
aLines.pop_front();
line->Destroy(shell);
}
}
nsresult
nsLineIterator::Init(nsLineList& aLines, PRBool aRightToLeft)
{
mRightToLeft = aRightToLeft;
// Count the lines
PRInt32 numLines = aLines.size();
if (0 == numLines) {
// Use gDummyLines so that we don't need null pointer checks in
// the accessor methods
mLines = gDummyLines;
return NS_OK;
}
// Make a linear array of the lines
mLines = new nsLineBox*[numLines];
if (!mLines) {
// Use gDummyLines so that we don't need null pointer checks in
// the accessor methods
mLines = gDummyLines;
return NS_ERROR_OUT_OF_MEMORY;
}
nsLineBox** lp = mLines;
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end() ;
line != line_end;
++line)
{
*lp++ = line;
}
mNumLines = numLines;
return NS_OK;
}
void
nsLineBox::DeleteLineList(nsPresContext* aPresContext, nsLineList& aLines,
nsIFrame* aDestructRoot)
{
if (! aLines.empty()) {
// Delete our child frames before doing anything else. In particular
// we do all of this before our base class releases it's hold on the
// view.
#ifdef DEBUG
PRInt32 numFrames = 0;
#endif
for (nsIFrame* child = aLines.front()->mFirstChild; child; ) {
nsIFrame* nextChild = child->GetNextSibling();
child->SetNextSibling(nullptr);
child->DestroyFrom((aDestructRoot) ? aDestructRoot : child);
child = nextChild;
#ifdef DEBUG
numFrames++;
#endif
}
nsIPresShell *shell = aPresContext->PresShell();
do {
nsLineBox* line = aLines.front();
#ifdef DEBUG
numFrames -= line->GetChildCount();
#endif
aLines.pop_front();
line->Destroy(shell);
} while (! aLines.empty());
#ifdef DEBUG
NS_ASSERTION(numFrames == 0, "number of frames deleted does not match");
#endif
}
}
