class Buffer:
def __init__(self):
self.List = Cursor()
self.FileName = None # Current file
self.i = -1 # Char pointer
def __ConvertChars(self, line):
chars_lst = []
for char in line:
chars_lst.append(char)
return chars_lst
def SetFileName(self, filename):
self.FileName = filename
def GetLineSize(self):
return len(self.List.getCurrent())
def GetCurrentLine(self):
if not self.IsEmpty():
line = ''.join(self.List.getCurrent())
return line
return 'File is Empty!'
def GetCurrentChar(self):
if not self.GetLineSize() == 0:
return self.GetCurrentLine()[self.i]
return 'File is Empty!'
def EditFile(self, filename):
self.__init__()
self.SetFileName(filename)
lines_lst = []
try:
with open(self.FileName, 'r') as f:
lines_lst = f.readlines()
except FileNotFoundError:
return -1
if len(lines_lst) > 0:
for line in lines_lst:
self.InsertLine(line)
return 0
def CreateNewFile(self, filename):
with open(filename, 'w') as f:
pass
self.EditFile(filename)
def InsertLine(self, line):
chars = self.__ConvertChars(line + '\n')
self.List.insertAfter(chars)
def InsertChar(self, char):
if self.IsEmpty():
self.List.insertAfter([char])
self.i += 1
else:
self.List.getCurrent().insert(self.i + 1, char)
self.i += 1
def MoveUp(self):
if self.List.hasPrevious():
self.List.previous()
else:
print('There is no line above!')
def MoveDown(self):
if self.List.hasNext():
self.List.next()
else:
print('That\'s the end of file!')
def MoveRight(self):
if not self.IsEmpty() and self.GetLineSize() != 0:
if self.i == -1 or self.i == 0:
self.MoveDown()
self.i = 0
else:
self.i += 1
else:
print('List/Line is empty!')
def MoveLeft(self):
if not self.IsEmpty() and self.GetLineSize() != 0:
if self.i == (0 - self.GetLineSize()):
self.MoveUp()
self.i = -1
else:
self.i -= 1
else:
print('List/Line is empty!')
def DeleteLine(self):
if not self.IsEmpty():
return self.List.remove()
print('List is empty!')
def DeleteChar(self):
if not self.IsEmpty() and self.GetCurrentLine() != 0:
return self.List.getCurrent().remove(self.i)
print('List/Line is empty!')
def ReplaceLine(self, newLine):
if not self.IsEmpty():
self.List.getCurrent().setData(newLine)
return
print('List is empty!')
def ReplaceChar(self, newchar):
if not self.IsEmpty() and self.GetCurrentLine() != 0:
self.List.getCurrent()[self.i] = newchar
return self.List
print('List/Line is empty!')
def ClearFile(self):
self.CreateNewFile(self.FileName)
def SaveFile(self):
with open(self.FileName, 'w+') as f:
if not self.IsEmpty():
for line in self.List:
f.write(''.join(line))
print('File Save Successfully!')
def IsEmpty(self):
return self.List.isEmpty()
def __len__(self):
return len(self.List)
def __str__(self):
if self.IsEmpty():
return 'File is empty!'
lines = ''
for line in self.List:
lines += ''.join(line)
return lines
