diff options
Diffstat (limited to 'Tools/idle/IdleHistory.py')
-rw-r--r-- | Tools/idle/IdleHistory.py | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Tools/idle/IdleHistory.py b/Tools/idle/IdleHistory.py new file mode 100644 index 0000000..0798098 --- /dev/null +++ b/Tools/idle/IdleHistory.py @@ -0,0 +1,73 @@ +import string + +class History: + + def __init__(self, text): + self.text = text + self.history = [] + self.history_prefix = None + self.history_pointer = None + 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 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.text.get("iomark", "end-1c") != self.history[pointer]: + pointer = prefix = None + if pointer is None or prefix is None: + prefix = self.text.get("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.text.get("iomark", "end-1c") != prefix: + self.text.delete("iomark", "end-1c") + self.text.insert("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.text.insert("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 = string.strip(source) + if len(source) > 2: + self.history.append(source) + self.history_pointer = None + self.history_prefix = None + + def recall(self, s): + s = string.strip(s) + 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") + |