mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-02 18:08:58 +00:00
130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* a list of the recomputation that needs to be done in response to a
|
|
* style change
|
|
*/
|
|
|
|
#include "nsStyleChangeList.h"
|
|
#include "nsIContent.h"
|
|
|
|
static const uint32_t kGrowArrayBy = 10;
|
|
|
|
nsStyleChangeList::nsStyleChangeList()
|
|
: mArray(mBuffer),
|
|
mArraySize(kStyleChangeBufferSize),
|
|
mCount(0)
|
|
{
|
|
MOZ_COUNT_CTOR(nsStyleChangeList);
|
|
}
|
|
|
|
nsStyleChangeList::~nsStyleChangeList()
|
|
{
|
|
MOZ_COUNT_DTOR(nsStyleChangeList);
|
|
Clear();
|
|
}
|
|
|
|
nsresult
|
|
nsStyleChangeList::ChangeAt(int32_t aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
|
|
nsChangeHint& aHint) const
|
|
{
|
|
if ((0 <= aIndex) && (aIndex < mCount)) {
|
|
aFrame = mArray[aIndex].mFrame;
|
|
aContent = mArray[aIndex].mContent;
|
|
aHint = mArray[aIndex].mHint;
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleChangeList::ChangeAt(int32_t aIndex, const nsStyleChangeData** aChangeData) const
|
|
{
|
|
if ((0 <= aIndex) && (aIndex < mCount)) {
|
|
*aChangeData = &mArray[aIndex];
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint)
|
|
{
|
|
NS_ASSERTION(aFrame || (aHint & nsChangeHint_ReconstructFrame),
|
|
"must have frame");
|
|
NS_ASSERTION(aContent || !(aHint & nsChangeHint_ReconstructFrame),
|
|
"must have content");
|
|
// XXXbz we should make this take Element instead of nsIContent
|
|
NS_ASSERTION(!aContent || aContent->IsElement(),
|
|
"Shouldn't be trying to restyle non-elements directly");
|
|
NS_ASSERTION(!(aHint & nsChangeHint_AllReflowHints) ||
|
|
(aHint & nsChangeHint_NeedReflow),
|
|
"Reflow hint bits set without actually asking for a reflow");
|
|
|
|
if ((0 < mCount) && (aHint & nsChangeHint_ReconstructFrame)) { // filter out all other changes for same content
|
|
if (aContent) {
|
|
for (int32_t index = mCount - 1; index >= 0; --index) {
|
|
if (aContent == mArray[index].mContent) { // remove this change
|
|
aContent->Release();
|
|
mCount--;
|
|
if (index < mCount) { // move later changes down
|
|
::memmove(&mArray[index], &mArray[index + 1],
|
|
(mCount - index) * sizeof(nsStyleChangeData));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int32_t last = mCount - 1;
|
|
if ((0 < mCount) && aFrame && (aFrame == mArray[last].mFrame)) { // same as last frame
|
|
NS_UpdateHint(mArray[last].mHint, aHint);
|
|
}
|
|
else {
|
|
if (mCount == mArraySize) {
|
|
int32_t newSize = mArraySize + kGrowArrayBy;
|
|
nsStyleChangeData* newArray = new nsStyleChangeData[newSize];
|
|
if (newArray) {
|
|
memcpy(newArray, mArray, mCount * sizeof(nsStyleChangeData));
|
|
if (mArray != mBuffer) {
|
|
delete [] mArray;
|
|
}
|
|
mArray = newArray;
|
|
mArraySize = newSize;
|
|
}
|
|
else {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
mArray[mCount].mFrame = aFrame;
|
|
mArray[mCount].mContent = aContent;
|
|
if (aContent) {
|
|
aContent->AddRef();
|
|
}
|
|
mArray[mCount].mHint = aHint;
|
|
mCount++;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsStyleChangeList::Clear()
|
|
{
|
|
for (int32_t index = mCount - 1; index >= 0; --index) {
|
|
nsIContent* content = mArray[index].mContent;
|
|
if (content) {
|
|
content->Release();
|
|
}
|
|
}
|
|
if (mArray != mBuffer) {
|
|
delete [] mArray;
|
|
mArray = mBuffer;
|
|
mArraySize = kStyleChangeBufferSize;
|
|
}
|
|
mCount = 0;
|
|
}
|
|
|