Initial revision
diff --git a/Lib/idlelib/IdleHistory.py b/Lib/idlelib/IdleHistory.py
new file mode 100644
index 0000000..aa41b73
--- /dev/null
+++ b/Lib/idlelib/IdleHistory.py
@@ -0,0 +1,89 @@
+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 = string.split(self.text.get(start, end), self.output_sep)
+ return string.join(lines, "\n")
+
+ def _put_source(self, where, source):
+ output = string.join(string.split(source, "\n"), self.output_sep)
+ 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 = string.strip(source)
+ 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 = 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")
+