Boolean
DMDragSelector::CheckSelectionChanged(
const LMarqueeTask& inMarqueeTask,
const Rect& inOldMarqueeRect,
const Rect& inNewMarqueeRect)
{
// Validate pointers.
ValidateThis_();
ValidateObject_(&mView);
// Convert local mouse location to port coordinates.
Point localPoint;
inMarqueeTask.GetCurrentPoint(localPoint);
mView.LocalToPortPoint(localPoint);
// See if auto-scrolling is called for.
Boolean wantsToAutoScroll = !mView.PointIsInFrame(localPoint.h, localPoint.v);
// See if selection is changing.
CheckElements(inOldMarqueeRect, inNewMarqueeRect);
// Return true in either case.
return (mAddToSelection.GetCount() > 0)
|| (mRemoveFromSelection.GetCount() > 0)
|| wantsToAutoScroll;
}
nsresult
CacheFileMetadata::ParseMetadata(uint32_t aMetaOffset, uint32_t aBufOffset,
bool aHaveKey)
{
LOG(("CacheFileMetadata::ParseMetadata() [this=%p, metaOffset=%d, "
"bufOffset=%d, haveKey=%u]", this, aMetaOffset, aBufOffset, aHaveKey));
nsresult rv;
uint32_t metaposOffset = mBufSize - sizeof(uint32_t);
uint32_t hashesOffset = aBufOffset + sizeof(uint32_t);
uint32_t hashCount = aMetaOffset / kChunkSize;
if (aMetaOffset % kChunkSize)
hashCount++;
uint32_t hashesLen = hashCount * sizeof(CacheHash::Hash16_t);
uint32_t hdrOffset = hashesOffset + hashesLen;
uint32_t keyOffset = hdrOffset + sizeof(CacheFileMetadataHeader);
LOG(("CacheFileMetadata::ParseMetadata() [this=%p]\n metaposOffset=%d\n "
"hashesOffset=%d\n hashCount=%d\n hashesLen=%d\n hdfOffset=%d\n "
"keyOffset=%d\n", this, metaposOffset, hashesOffset, hashCount,
hashesLen,hdrOffset, keyOffset));
if (keyOffset > metaposOffset) {
LOG(("CacheFileMetadata::ParseMetadata() - Wrong keyOffset! [this=%p]",
this));
return NS_ERROR_FILE_CORRUPTED;
}
mMetaHdr.ReadFromBuf(mBuf + hdrOffset);
if (mMetaHdr.mVersion != kCacheEntryVersion) {
LOG(("CacheFileMetadata::ParseMetadata() - Not a version we understand to. "
"[version=0x%x, this=%p]", mMetaHdr.mVersion, this));
return NS_ERROR_UNEXPECTED;
}
uint32_t elementsOffset = mMetaHdr.mKeySize + keyOffset + 1;
if (elementsOffset > metaposOffset) {
LOG(("CacheFileMetadata::ParseMetadata() - Wrong elementsOffset %d "
"[this=%p]", elementsOffset, this));
return NS_ERROR_FILE_CORRUPTED;
}
// check that key ends with \0
if (mBuf[elementsOffset - 1] != 0) {
LOG(("CacheFileMetadata::ParseMetadata() - Elements not null terminated. "
"[this=%p]", this));
return NS_ERROR_FILE_CORRUPTED;
}
if (!aHaveKey) {
// get the key form metadata
mKey.Assign(mBuf + keyOffset, mMetaHdr.mKeySize);
rv = ParseKey(mKey);
if (NS_FAILED(rv))
return rv;
}
else {
if (mMetaHdr.mKeySize != mKey.Length()) {
LOG(("CacheFileMetadata::ParseMetadata() - Key collision (1), key=%s "
"[this=%p]", nsCString(mBuf + keyOffset, mMetaHdr.mKeySize).get(),
this));
return NS_ERROR_FILE_CORRUPTED;
}
if (memcmp(mKey.get(), mBuf + keyOffset, mKey.Length()) != 0) {
LOG(("CacheFileMetadata::ParseMetadata() - Key collision (2), key=%s "
"[this=%p]", nsCString(mBuf + keyOffset, mMetaHdr.mKeySize).get(),
this));
return NS_ERROR_FILE_CORRUPTED;
}
}
// check metadata hash (data from hashesOffset to metaposOffset)
CacheHash::Hash32_t hashComputed, hashExpected;
hashComputed = CacheHash::Hash(mBuf + hashesOffset,
metaposOffset - hashesOffset);
hashExpected = NetworkEndian::readUint32(mBuf + aBufOffset);
if (hashComputed != hashExpected) {
LOG(("CacheFileMetadata::ParseMetadata() - Metadata hash mismatch! Hash of "
"the metadata is %x, hash in file is %x [this=%p]", hashComputed,
hashExpected, this));
return NS_ERROR_FILE_CORRUPTED;
}
// check elements
rv = CheckElements(mBuf + elementsOffset, metaposOffset - elementsOffset);
if (NS_FAILED(rv))
return rv;
mHashArraySize = hashesLen;
mHashCount = hashCount;
if (mHashArraySize) {
mHashArray = static_cast<CacheHash::Hash16_t *>(
moz_xmalloc(mHashArraySize));
memcpy(mHashArray, mBuf + hashesOffset, mHashArraySize);
}
mMetaHdr.mFetchCount++;
MarkDirty();
mElementsSize = metaposOffset - elementsOffset;
memmove(mBuf, mBuf + elementsOffset, mElementsSize);
mOffset = aMetaOffset;
// TODO: shrink memory if buffer is too big
DoMemoryReport(MemoryUsage());
return NS_OK;
}
nsresult
CacheFileMetadata::ParseMetadata(uint32_t aMetaOffset, uint32_t aBufOffset)
{
LOG(("CacheFileMetadata::ParseMetadata() [this=%p, metaOffset=%d, "
"bufOffset=%d]", this, aMetaOffset, aBufOffset));
nsresult rv;
uint32_t metaposOffset = mBufSize - sizeof(uint32_t);
uint32_t hashesOffset = aBufOffset + sizeof(uint32_t);
uint32_t hashCount = aMetaOffset / kChunkSize;
if (aMetaOffset % kChunkSize)
hashCount++;
uint32_t hashesLen = hashCount * sizeof(CacheHashUtils::Hash16_t);
uint32_t hdrOffset = hashesOffset + hashesLen;
uint32_t keyOffset = hdrOffset + sizeof(CacheFileMetadataHeader);
LOG(("CacheFileMetadata::ParseMetadata() [this=%p]\n metaposOffset=%d\n "
"hashesOffset=%d\n hashCount=%d\n hashesLen=%d\n hdfOffset=%d\n "
"keyOffset=%d\n", this, metaposOffset, hashesOffset, hashCount,
hashesLen,hdrOffset, keyOffset));
if (keyOffset > metaposOffset) {
LOG(("CacheFileMetadata::ParseMetadata() - Wrong keyOffset! [this=%p]",
this));
return NS_ERROR_FILE_CORRUPTED;
}
uint32_t elementsOffset = reinterpret_cast<CacheFileMetadataHeader *>(
mBuf + hdrOffset)->mKeySize + keyOffset + 1;
if (elementsOffset > metaposOffset) {
LOG(("CacheFileMetadata::ParseMetadata() - Wrong elementsOffset %d "
"[this=%p]", elementsOffset, this));
return NS_ERROR_FILE_CORRUPTED;
}
// check that key ends with \0
if (mBuf[elementsOffset - 1] != 0) {
LOG(("CacheFileMetadata::ParseMetadata() - Elements not null terminated. "
"[this=%p]", this));
return NS_ERROR_FILE_CORRUPTED;
}
nsAutoCString origKey;
uint32_t keySize = reinterpret_cast<CacheFileMetadataHeader *>(
mBuf + hdrOffset)->mKeySize;
if (mKeyIsHash) {
// get the original key
origKey.Assign(mBuf + keyOffset, keySize);
}
else {
if (keySize != mKey.Length()) {
LOG(("CacheFileMetadata::ParseMetadata() - Key collision (1), key=%s "
"[this=%p]", nsCString(mBuf + keyOffset, keySize).get(), this));
return NS_ERROR_FILE_CORRUPTED;
}
if (memcmp(mKey.get(), mBuf + keyOffset, mKey.Length()) != 0) {
LOG(("CacheFileMetadata::ParseMetadata() - Key collision (2), key=%s "
"[this=%p]", nsCString(mBuf + keyOffset, keySize).get(), this));
return NS_ERROR_FILE_CORRUPTED;
}
}
// check metadata hash (data from hashesOffset to metaposOffset)
CacheHashUtils::Hash32_t hash;
hash = CacheHashUtils::Hash(mBuf + hashesOffset,
metaposOffset - hashesOffset);
if (hash != PR_ntohl(*(reinterpret_cast<uint32_t *>(mBuf + aBufOffset)))) {
LOG(("CacheFileMetadata::ParseMetadata() - Metadata hash mismatch! Hash of "
"the metadata is %x, hash in file is %x [this=%p]", hash,
PR_ntohl(*(reinterpret_cast<uint32_t *>(mBuf + aBufOffset))), this));
return NS_ERROR_FILE_CORRUPTED;
}
// check elements
rv = CheckElements(mBuf + elementsOffset, metaposOffset - elementsOffset);
if (NS_FAILED(rv))
return rv;
mHashArraySize = hashesLen;
mHashCount = hashCount;
if (mHashArraySize) {
mHashArray = static_cast<CacheHashUtils::Hash16_t *>(
moz_xmalloc(mHashArraySize));
memcpy(mHashArray, mBuf + hashesOffset, mHashArraySize);
}
memcpy(&mMetaHdr, mBuf + hdrOffset, sizeof(CacheFileMetadataHeader));
mMetaHdr.mFetchCount++;
MarkDirty();
mElementsSize = metaposOffset - elementsOffset;
memmove(mBuf, mBuf + elementsOffset, mElementsSize);
mOffset = aMetaOffset;
if (mKeyIsHash) {
mKey = origKey;
mKeyIsHash = false;
}
// TODO: shrink memory if buffer is too big
DoMemoryReport(MemoryUsage());
return NS_OK;
}
