void
nsCSSExpandedDataBlock::Expand(nsCSSCompressedDataBlock *aNormalBlock,
nsCSSCompressedDataBlock *aImportantBlock)
{
NS_ABORT_IF_FALSE(aNormalBlock, "unexpected null block");
AssertInitialState();
DoExpand(aNormalBlock, false);
if (aImportantBlock) {
DoExpand(aImportantBlock, true);
}
}
void
nsCSSExpandedDataBlock::Clear()
{
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
continue;
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
continue;
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
ClearLonghandProperty(iProp);
}
}
AssertInitialState();
}
void
nsCSSExpandedDataBlock::Compress(nsCSSCompressedDataBlock **aNormalBlock,
nsCSSCompressedDataBlock **aImportantBlock)
{
nsAutoPtr<nsCSSCompressedDataBlock> result_normal, result_important;
uint32_t i_normal = 0, i_important = 0;
uint32_t numPropsNormal, numPropsImportant;
ComputeNumProps(&numPropsNormal, &numPropsImportant);
result_normal =
new(numPropsNormal) nsCSSCompressedDataBlock(numPropsNormal);
if (numPropsImportant != 0) {
result_important =
new(numPropsImportant) nsCSSCompressedDataBlock(numPropsImportant);
} else {
result_important = nullptr;
}
/*
* Save needless copying and allocation by copying the memory
* corresponding to the stored data in the expanded block, and then
* clearing the data in the expanded block.
*/
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
continue;
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
continue;
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
bool important =
mPropertiesImportant.HasPropertyAt(iHigh, iLow);
nsCSSCompressedDataBlock *result =
important ? result_important : result_normal;
uint32_t* ip = important ? &i_important : &i_normal;
nsCSSValue* val = PropertyAt(iProp);
NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null,
"Null value while compressing");
result->SetPropertyAtIndex(*ip, iProp);
result->RawCopyValueToIndex(*ip, val);
new (val) nsCSSValue();
(*ip)++;
result->mStyleBits |=
nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]);
}
}
NS_ABORT_IF_FALSE(numPropsNormal == i_normal, "bad numProps");
if (result_important) {
NS_ABORT_IF_FALSE(numPropsImportant == i_important, "bad numProps");
}
ClearSets();
AssertInitialState();
*aNormalBlock = result_normal.forget();
*aImportantBlock = result_important.forget();
}
nsCSSExpandedDataBlock::~nsCSSExpandedDataBlock()
{
AssertInitialState();
}
void
nsCSSExpandedDataBlock::Compress(nsCSSCompressedDataBlock **aNormalBlock,
nsCSSCompressedDataBlock **aImportantBlock)
{
nsAutoPtr<nsCSSCompressedDataBlock> result_normal, result_important;
char *cursor_normal, *cursor_important;
ComputeSizeResult size = ComputeSize();
result_normal = new(size.normal) nsCSSCompressedDataBlock();
cursor_normal = result_normal->Block();
if (size.important != 0) {
result_important = new(size.important) nsCSSCompressedDataBlock();
cursor_important = result_important->Block();
} else {
result_important = nsnull;
cursor_important = nsnull;
}
/*
* Save needless copying and allocation by copying the memory
* corresponding to the stored data in the expanded block, and then
* clearing the data in the expanded block.
*/
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
continue;
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
continue;
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
bool important =
mPropertiesImportant.HasPropertyAt(iHigh, iLow);
char *&cursor = important ? cursor_important : cursor_normal;
nsCSSCompressedDataBlock *result =
important ? result_important : result_normal;
nsCSSValue* val = PropertyAt(iProp);
NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null,
"Null value while compressing");
CDBValueStorage *storage =
reinterpret_cast<CDBValueStorage*>(cursor);
storage->property = iProp;
memcpy(&storage->value, val, sizeof(nsCSSValue));
new (val) nsCSSValue();
cursor += CDBValueStorage_advance;
result->mStyleBits |=
nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]);
}
}
result_normal->SetBlockEnd(cursor_normal);
NS_ABORT_IF_FALSE(result_normal->DataSize() == ptrdiff_t(size.normal),
"size miscalculation");
if (result_important) {
result_important->SetBlockEnd(cursor_important);
NS_ABORT_IF_FALSE(result_important->DataSize() ==
ptrdiff_t(size.important),
"size miscalculation");
}
ClearSets();
AssertInitialState();
*aNormalBlock = result_normal.forget();
*aImportantBlock = result_important.forget();
}