Ring buffer used as undobuffer for RawTurtle objects.
| 814 | |
| 815 | |
| 816 | class Tbuffer(object): |
| 817 | """Ring buffer used as undobuffer for RawTurtle objects.""" |
| 818 | def __init__(self, bufsize=10): |
| 819 | self.bufsize = bufsize |
| 820 | self.buffer = [[None]] * bufsize |
| 821 | self.ptr = -1 |
| 822 | self.cumulate = False |
| 823 | def reset(self, bufsize=None): |
| 824 | if bufsize is None: |
| 825 | for i in range(self.bufsize): |
| 826 | self.buffer[i] = [None] |
| 827 | else: |
| 828 | self.bufsize = bufsize |
| 829 | self.buffer = [[None]] * bufsize |
| 830 | self.ptr = -1 |
| 831 | def push(self, item): |
| 832 | if self.bufsize > 0: |
| 833 | if not self.cumulate: |
| 834 | self.ptr = (self.ptr + 1) % self.bufsize |
| 835 | self.buffer[self.ptr] = item |
| 836 | else: |
| 837 | self.buffer[self.ptr].append(item) |
| 838 | def pop(self): |
| 839 | if self.bufsize > 0: |
| 840 | item = self.buffer[self.ptr] |
| 841 | if item is None: |
| 842 | return None |
| 843 | else: |
| 844 | self.buffer[self.ptr] = [None] |
| 845 | self.ptr = (self.ptr - 1) % self.bufsize |
| 846 | return (item) |
| 847 | def nr_of_items(self): |
| 848 | return self.bufsize - self.buffer.count([None]) |
| 849 | def __repr__(self): |
| 850 | return str(self.buffer) + " " + str(self.ptr) |
| 851 | |
| 852 | |
| 853 |
no outgoing calls
no test coverage detected