Ring buffer used as undobuffer for RawTurtle objects.
| 916 | |
| 917 | |
| 918 | class Tbuffer(object): |
| 919 | """Ring buffer used as undobuffer for RawTurtle objects.""" |
| 920 | def __init__(self, bufsize=10): |
| 921 | self.bufsize = bufsize |
| 922 | self.buffer = [[None]] * bufsize |
| 923 | self.ptr = -1 |
| 924 | self.cumulate = False |
| 925 | def reset(self, bufsize=None): |
| 926 | if bufsize is None: |
| 927 | for i in range(self.bufsize): |
| 928 | self.buffer[i] = [None] |
| 929 | else: |
| 930 | self.bufsize = bufsize |
| 931 | self.buffer = [[None]] * bufsize |
| 932 | self.ptr = -1 |
| 933 | def push(self, item): |
| 934 | if self.bufsize > 0: |
| 935 | if not self.cumulate: |
| 936 | self.ptr = (self.ptr + 1) % self.bufsize |
| 937 | self.buffer[self.ptr] = item |
| 938 | else: |
| 939 | self.buffer[self.ptr].append(item) |
| 940 | def pop(self): |
| 941 | if self.bufsize > 0: |
| 942 | item = self.buffer[self.ptr] |
| 943 | if item is None: |
| 944 | return None |
| 945 | else: |
| 946 | self.buffer[self.ptr] = [None] |
| 947 | self.ptr = (self.ptr - 1) % self.bufsize |
| 948 | return (item) |
| 949 | def nr_of_items(self): |
| 950 | return self.bufsize - self.buffer.count([None]) |
| 951 | def __repr__(self): |
| 952 | return str(self.buffer) + " " + str(self.ptr) |
| 953 | |
| 954 | |
| 955 |
no outgoing calls
no test coverage detected