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@ -2,47 +2,11 @@ |
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# pylint: disable=too-few-public-methods |
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from collections import OrderedDict |
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import logging |
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LOGGER = logging.getLogger() |
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class OrderedLifoDict: |
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"""Ordered (LIFO) dictionary. |
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Mimics the :class:`dict` dictionary, with: |
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- dictionary is ordered: the order the keys are kept (as with |
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:class:`collections.OrderedDict`), excepted that: |
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- LIFO: the last item is reterned first when iterating. |
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""" |
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def __init__(self, default=None): |
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if default is None: |
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self._keys = [] |
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self._values = {} |
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else: |
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self._keys = list(default.keys()) |
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self._values = default.copy() |
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def values(self): |
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"""Same as :meth:`dict.values`.""" |
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for key in self: |
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yield self._values[key] |
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def __iter__(self): |
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yield from self._keys |
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def __setitem__(self, key, value): |
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if key not in self._keys: |
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self._keys.insert(0, key) |
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self._values[key] = value |
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def __getitem__(self, key): |
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return self._values[key] |
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def get(self, key, default=None): |
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"""Same as :meth:`dict.get`.""" |
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return self._values.get(key, default) |
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def _indent(string): |
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"""Return and indented version of argument.""" |
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return "\n".join([" {}".format(line) for line in string.split('\n')]) |
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@ -100,7 +64,11 @@ class Line(AST): |
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self.line = [] |
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def prepend(self, data): |
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"""Add an object at the beginning of line.""" |
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"""Add an object at the beginning of line. |
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Does nothing if argument is `None`. |
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""" |
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if data is not None: |
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self.line.insert(0, data) |
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return self |
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@ -109,14 +77,17 @@ class Line(AST): |
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while True: |
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if not self.line: |
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return self |
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if isinstance(self.line[0], Space): |
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if isinstance(self.line[0], Space) or isinstance(self.line[0], Error): |
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del self.line[0] |
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continue |
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if isinstance(self.line[-1], Space): |
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if isinstance(self.line[-1], Space) or isinstance(self.line[-1], Error): |
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del self.line[-1] |
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continue |
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return self |
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def is_empty(self): |
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return len(self.strip().line) == 0 |
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class LineElement(AST): |
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"""Something present on a line.""" |
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# pylint: disable=abstract-method |
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@ -206,26 +177,29 @@ class Song(AST): |
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def __init__(self, filename): |
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super().__init__() |
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self.content = [] |
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self.meta = OrderedLifoDict() |
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self.meta = OrderedDict() |
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self._authors = [] |
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self._titles = [] |
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self._subtitles = [] |
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self._keys = [] |
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self.filename = filename |
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def add(self, data): |
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"""Add an element to the song""" |
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if isinstance(data, Error): |
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return self |
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pass |
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elif data is None: |
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# New line |
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if not (self.content and isinstance(self.content[0], Newline)): |
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self.content.insert(0, Newline()) |
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elif isinstance(data, Line): |
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if not (self.content and isinstance(self.content[0], EndOfLine)): |
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self.content.insert(0, EndOfLine()) |
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elif isinstance(data, Line) or isinstance(data, NewLine): |
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# Add a new line, maybe in the current verse. |
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if not data.is_empty(): |
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if not (self.content and isinstance(self.content[0], Verse)): |
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self.content.insert(0, Verse()) |
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self.content[0].prepend(data.strip()) |
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elif isinstance(data, Directive) and data.inline: |
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# Add a directive in the content of the song. |
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self.content.append(data) |
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elif data.inline: |
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# Add an object in the content of the song. |
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self.content.insert(0, data) |
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@ -242,13 +216,13 @@ class Song(AST): |
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def add_title(self, data): |
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"""Add a title""" |
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self._titles.insert(0, data.argument) |
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self._titles.append(data.argument) |
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def add_cumulative(self, data): |
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"""Add a cumulative argument into metadata""" |
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if data.keyword not in self.meta: |
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self.meta[data.keyword] = [] |
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self.meta[data.keyword].insert(0, data) |
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self.meta[data.keyword].append(data) |
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def get_data_argument(self, keyword, default): |
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"""Return `self.meta[keyword].argument`. |
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@ -267,7 +241,7 @@ class Song(AST): |
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def add_subtitle(self, data): |
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"""Add a subtitle""" |
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self._subtitles.insert(0, data.argument) |
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self._subtitles.append(data.argument) |
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@property |
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def titles(self): |
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@ -276,7 +250,7 @@ class Song(AST): |
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def add_author(self, data): |
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"""Add an auhor.""" |
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self._authors.insert(0, data.argument) |
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self._authors.append(data.argument) |
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@property |
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def authors(self): |
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@ -286,19 +260,20 @@ class Song(AST): |
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def add_key(self, data): |
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"""Add a new {key: foo: bar} directive.""" |
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key, *argument = data.argument.split(":") |
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if 'keys' not in self.meta: |
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self.meta['keys'] = [] |
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self.meta['keys'].insert(0, Directive( |
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if 'morekeys' not in self.meta: |
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self.meta['morekeys'] = [] |
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self.meta['morekeys'].append(Directive( |
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key.strip(), |
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":".join(argument).strip(), |
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)) |
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class Newline(AST): |
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class EndOfLine(AST): |
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"""New line""" |
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_template = "newline" |
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_template = "endofline" |
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class Directive(AST): |
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"""A directive""" |
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meta = True |
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def __init__(self, keyword, argument=None): |
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super().__init__() |
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@ -322,6 +297,21 @@ class Directive(AST): |
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def __str__(self): |
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return self.argument |
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@classmethod |
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def create(cls, keyword, argument=None): |
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if keyword == "newline": |
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return NewLine(keyword, argument) |
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else: |
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return cls(keyword, argument) |
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class NewLine(Directive): |
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keyword = "newline" |
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_template = "newline" |
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meta = False |
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def strip(self): |
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return self |
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class Define(Directive): |
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"""A chord definition. |
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