SqlitePage::BlockAreas SqlitePage::freeBlocks()
{
BlockAreas freeBlockAreaList;
CellList cellList = this->cellList(); // FIXIT
if (cellList.empty()) {
return freeBlockAreaList;
}
BlockArea firstBlock;
PageHeader header = pageHeader();
// FIXIT: 8 is not good
firstBlock.begin = header.numOfCells * 2 + 8;
firstBlock.end = cellList[cellList.size() - 1].offset - 1;
freeBlockAreaList.push_back(firstBlock);
if (cellList.size() > 1) {
// Cell List 是自底向上增长的，所以这里使用反向迭代器遍历
CellList::reverse_iterator rpos;
for (rpos = cellList.rbegin();
rpos != cellList.rend(); ++rpos) {
BlockArea block;
block.begin = rpos->offset;
block.end = rpos->offset + rpos->length;
CellList::reverse_iterator tmp_rpos = rpos + 1;
if (block.end < tmp_rpos->offset - kMinFreeBlockSize &&
block.end < page_.size() - kMinFreeBlockSize) {
freeBlockAreaList.push_back(block);
}
}
}
return freeBlockAreaList;
}
void InfoPanel::buildInfoPage(Selection sel,
Universe* universe,
double tdb)
{
QString pageText;
QTextStream stream(&pageText, QIODevice::WriteOnly);
pageHeader(stream);
if (sel.body() != NULL)
{
buildSolarSystemBodyPage(sel.body(), tdb, stream);
}
else if (sel.star() != NULL)
{
buildStarPage(sel.star(), universe, tdb, stream);
}
else if (sel.deepsky() != NULL)
{
buildDSOPage(sel.deepsky(), universe, stream);
}
else
{
stream << "Error: no object selected!\n";
}
pageFooter(stream);
textBrowser->setHtml(pageText);
}
SqlitePage::CellPointers SqlitePage::cellPointers()
{
CellPointers cellPointers;
base::bytes_it cellPtrsStart = cellPointersOffset();
int offset = 0;
for (int i = 0; i < pageHeader().numOfCells; ++i)
{
base::byte_t* b = &(*(cellPtrsStart + offset));
uint32_t cellOffset = getValueFromMem<uint32_t>((char *)b, 2);
cellPointers.push_back(cellOffset);
offset += 2;
}
return cellPointers;
}
