mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-26 05:02:31 -06:00
94 lines
3.5 KiB
Python
94 lines
3.5 KiB
Python
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from pandac.PandaModules import VirtualFileSystem, VirtualFileMountSystem, Filename, TiXmlDocument
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vfs = VirtualFileSystem.getGlobalPtr()
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class ScanDirectoryNode:
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""" This class is used to scan a list of files on disk. """
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def __init__(self, pathname, ignoreUsageXml = False):
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self.pathname = pathname
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self.filenames = []
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self.fileSize = 0
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self.nested = []
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self.nestedSize = 0
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xusage = None
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if not ignoreUsageXml:
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# Look for a usage.xml file in this directory. If we find
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# one, we read it for the file size and then stop here, as
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# an optimization.
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usageFilename = Filename(pathname, 'usage.xml')
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doc = TiXmlDocument(usageFilename.toOsSpecific())
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if doc.LoadFile():
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xusage = doc.FirstChildElement('usage')
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if xusage:
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diskSpace = xusage.Attribute('disk_space')
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try:
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diskSpace = int(diskSpace or '')
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except ValueError:
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diskSpace = None
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if diskSpace is not None:
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self.fileSize = diskSpace
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return
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files = vfs.scanDirectory(self.pathname)
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if files is None:
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files = []
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for vfile in files:
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if hasattr(vfile, 'getMount'):
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if not isinstance(vfile.getMount(), VirtualFileMountSystem):
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# Not a real file; ignore it.
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continue
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if vfile.isDirectory():
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# A nested directory.
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subdir = ScanDirectoryNode(vfile.getFilename(), ignoreUsageXml = ignoreUsageXml)
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self.nested.append(subdir)
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self.nestedSize += subdir.getTotalSize()
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elif vfile.isRegularFile():
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# A nested file.
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self.filenames.append(vfile.getFilename())
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self.fileSize += vfile.getFileSize()
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else:
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# Some other wacky file thing.
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self.filenames.append(vfile.getFilename())
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if xusage:
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# Now update the usage.xml file with the newly-determined
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# disk space.
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xusage.SetAttribute('disk_space', str(self.getTotalSize()))
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tfile = Filename.temporary(pathname.cStr(), '.xml')
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if doc.SaveFile(tfile.toOsSpecific()):
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tfile.renameTo(usageFilename)
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def getTotalSize(self):
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return self.nestedSize + self.fileSize
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def extractSubdir(self, pathname):
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""" Finds the ScanDirectoryNode within this node that
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corresponds to the indicated full pathname. If it is found,
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removes it from its parent, and returns it. If it is not
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found, returns None. """
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# We could be a little smarter here, but why bother. Just
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# recursively search all children.
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for subdir in self.nested:
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if subdir.pathname == pathname:
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self.nested.remove(subdir)
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self.nestedSize -= subdir.getTotalSize()
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return subdir
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result = subdir.extractSubdir(pathname)
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if result:
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self.nestedSize -= result.getTotalSize()
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if subdir.getTotalSize() == 0:
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# No other files in the subdirectory that contains
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# this package; remove it too.
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self.nested.remove(subdir)
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return result
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return None
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