89 lines
3 KiB
Python
89 lines
3 KiB
Python
import string
|
|
|
|
class History:
|
|
|
|
def __init__(self, text, output_sep = "\n"):
|
|
self.text = text
|
|
self.history = []
|
|
self.history_prefix = None
|
|
self.history_pointer = None
|
|
self.output_sep = output_sep
|
|
text.bind("<<history-previous>>", self.history_prev)
|
|
text.bind("<<history-next>>", self.history_next)
|
|
|
|
def history_next(self, event):
|
|
self.history_do(0)
|
|
return "break"
|
|
|
|
def history_prev(self, event):
|
|
self.history_do(1)
|
|
return "break"
|
|
|
|
def _get_source(self, start, end):
|
|
# Get source code from start index to end index. Lines in the
|
|
# text control may be separated by sys.ps2 .
|
|
lines = self.text.get(start, end).split(self.output_sep)
|
|
return "\n".join(lines)
|
|
|
|
def _put_source(self, where, source):
|
|
output = self.output_sep.join(source.split("\n"))
|
|
self.text.insert(where, output)
|
|
|
|
def history_do(self, reverse):
|
|
nhist = len(self.history)
|
|
pointer = self.history_pointer
|
|
prefix = self.history_prefix
|
|
if pointer is not None and prefix is not None:
|
|
if self.text.compare("insert", "!=", "end-1c") or \
|
|
self._get_source("iomark", "end-1c") != self.history[pointer]:
|
|
pointer = prefix = None
|
|
if pointer is None or prefix is None:
|
|
prefix = self._get_source("iomark", "end-1c")
|
|
if reverse:
|
|
pointer = nhist
|
|
else:
|
|
pointer = -1
|
|
nprefix = len(prefix)
|
|
while 1:
|
|
if reverse:
|
|
pointer = pointer - 1
|
|
else:
|
|
pointer = pointer + 1
|
|
if pointer < 0 or pointer >= nhist:
|
|
self.text.bell()
|
|
if self._get_source("iomark", "end-1c") != prefix:
|
|
self.text.delete("iomark", "end-1c")
|
|
self._put_source("iomark", prefix)
|
|
pointer = prefix = None
|
|
break
|
|
item = self.history[pointer]
|
|
if item[:nprefix] == prefix and len(item) > nprefix:
|
|
self.text.delete("iomark", "end-1c")
|
|
self._put_source("iomark", item)
|
|
break
|
|
self.text.mark_set("insert", "end-1c")
|
|
self.text.see("insert")
|
|
self.text.tag_remove("sel", "1.0", "end")
|
|
self.history_pointer = pointer
|
|
self.history_prefix = prefix
|
|
|
|
def history_store(self, source):
|
|
source = source.strip()
|
|
if len(source) > 2:
|
|
# avoid duplicates
|
|
try:
|
|
self.history.remove(source)
|
|
except ValueError:
|
|
pass
|
|
self.history.append(source)
|
|
self.history_pointer = None
|
|
self.history_prefix = None
|
|
|
|
def recall(self, s):
|
|
s = s.strip()
|
|
self.text.tag_remove("sel", "1.0", "end")
|
|
self.text.delete("iomark", "end-1c")
|
|
self.text.mark_set("insert", "end-1c")
|
|
self.text.insert("insert", s)
|
|
self.text.see("insert")
|
|
|