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128 lines
4.1 KiB
Python
128 lines
4.1 KiB
Python
# Created By: Virgil Dupras
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# Created On: 2006/05/02
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# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
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#
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# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
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# which should be included with this package. The terms are also available at
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# http://www.gnu.org/licenses/gpl-3.0.html
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from xml.etree import ElementTree as ET
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from hscommon.util import FileOrPath
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class IgnoreList:
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"""An ignore list implementation that is iterable, filterable and exportable to XML.
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Call Ignore to add an ignore list entry, and AreIgnore to check if 2 items are in the list.
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When iterated, 2 sized tuples will be returned, the tuples containing 2 items ignored together.
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"""
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# ---Override
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def __init__(self):
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self.clear()
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def __iter__(self):
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for first, seconds in self._ignored.items():
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for second in seconds:
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yield (first, second)
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def __len__(self):
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return self._count
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# ---Public
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def are_ignored(self, first, second):
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def do_check(first, second):
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try:
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matches = self._ignored[first]
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return second in matches
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except KeyError:
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return False
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return do_check(first, second) or do_check(second, first)
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def clear(self):
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self._ignored = {}
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self._count = 0
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def filter(self, func):
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"""Applies a filter on all ignored items, and remove all matches where func(first,second)
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doesn't return True.
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"""
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filtered = IgnoreList()
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for first, second in self:
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if func(first, second):
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filtered.ignore(first, second)
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self._ignored = filtered._ignored
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self._count = filtered._count
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def ignore(self, first, second):
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if self.are_ignored(first, second):
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return
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try:
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matches = self._ignored[first]
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matches.add(second)
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except KeyError:
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try:
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matches = self._ignored[second]
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matches.add(first)
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except KeyError:
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matches = set()
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matches.add(second)
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self._ignored[first] = matches
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self._count += 1
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def remove(self, first, second):
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def inner(first, second):
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try:
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matches = self._ignored[first]
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if second in matches:
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matches.discard(second)
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if not matches:
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del self._ignored[first]
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self._count -= 1
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return True
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else:
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return False
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except KeyError:
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return False
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if not inner(first, second) and not inner(second, first):
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raise ValueError()
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def load_from_xml(self, infile):
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"""Loads the ignore list from a XML created with save_to_xml.
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infile can be a file object or a filename.
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"""
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try:
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root = ET.parse(infile).getroot()
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except Exception:
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return
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file_elems = (e for e in root if e.tag == "file")
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for fn in file_elems:
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file_path = fn.get("path")
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if not file_path:
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continue
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subfile_elems = (e for e in fn if e.tag == "file")
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for sfn in subfile_elems:
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subfile_path = sfn.get("path")
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if subfile_path:
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self.ignore(file_path, subfile_path)
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def save_to_xml(self, outfile):
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"""Create a XML file that can be used by load_from_xml.
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outfile can be a file object or a filename.
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"""
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root = ET.Element("ignore_list")
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for filename, subfiles in self._ignored.items():
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file_node = ET.SubElement(root, "file")
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file_node.set("path", filename)
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for subfilename in subfiles:
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subfile_node = ET.SubElement(file_node, "file")
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subfile_node.set("path", subfilename)
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tree = ET.ElementTree(root)
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with FileOrPath(outfile, "wb") as fp:
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tree.write(fp, encoding="utf-8")
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