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85 lines
2.2 KiB
85 lines
2.2 KiB
class Document:
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def __init__(self, filename):
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self.characters = []
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self.cursor = Cursor(self)
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if len(filename) == 0:
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raise FileNameInvalid("Invalid filename")
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else:
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self.filename = filename
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def insert(self, character):
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if not hasattr(character, 'character'):
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character = Character(character)
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self.characters.insert(self.cursor.position, character)
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self.cursor.forward()
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def delete(self):
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try:
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del self.characters[self.cursor.position]
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except IndexError:
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print("No character to delete")
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def save(self):
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try:
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f = open(self.filename, "w")
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f.write(self.string)
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f.close()
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except IOError:
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print("Could not safe file")
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@property
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def string(self):
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return "".join((str(c) for c in self.characters))
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class Cursor:
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def __init__(self, document):
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self.document = document
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self.position = 0
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def forward(self):
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if self.position < len(self.document.characters):
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self.position += 1
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def back(self):
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if self.position > 0:
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self.position -= 1
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def home(self):
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while self.document.characters[self.position - 1].character != "\n":
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self.back()
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if self.position == 0:
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# got to beginning of file before newline
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break
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def end(self):
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while (self.position < len(self.document.characters) and
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self.document.characters[self.position].character != "\n"):
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self.forward()
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class Character:
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def __init__(self, character, bold=False, italic=False, underline=False):
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if len(character) != 1:
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raise CharacterLength("Please insert a single character")
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self.character = character
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self.bold = bold
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self.italic = italic
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self.underline = underline
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def __str__(self):
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bold = "*" if self.bold else ''
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italic = "/" if self.italic else ''
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underline = "_" if self.underline else ''
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return bold + italic + underline + self.character
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class FileNameInvalid(Exception):
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pass
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class CharacterLength(Exception):
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pass
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