from tkinter import *
from idlelib.EditorWindow import EditorWindow
import re
import tkinter.messagebox as tkMessageBox
from idlelib import IOBinding

class OutputWindow(EditorWindow):

"""An editor window that can serve as an output file.

Also the future base class for the Python shell window.
This class has no input facilities.
"""

def __init__(self, *args):
EditorWindow.__init__(self, *args)
self.text.bind("<<goto-file-line>>", self.goto_file_line)

# Customize EditorWindow

def ispythonsource(self, filename):
# No colorization needed
return 0

def short_title(self):
return "Output"

def maybesave(self):
# Override base class method -- don't ask any questions
if self.get_saved():
return "yes"
else:
return "no"

# Act as output file

def write(self, s, tags=(), mark="insert"):
if isinstance(s, (bytes, bytes)):
s = s.decode(IOBinding.encoding, "replace")
self.text.insert(mark, s, tags)
self.text.see(mark)
self.text.update()
return len(s)

def writelines(self, lines):
for line in lines:
self.write(line)

def flush(self):
pass

# Our own right-button menu

rmenu_specs = [
("Cut", "<<cut>>", "rmenu_check_cut"),
("Copy", "<<copy>>", "rmenu_check_copy"),
("Paste", "<<paste>>", "rmenu_check_paste"),
(None, None, None),
("Go to file/line", "<<goto-file-line>>", None),
]

file_line_pats = [
# order of patterns matters
r'file "([^"]*)", line (\d+)',
r'([^\s]+)\((\d+)\)',
r'^(\s*\S.*?):\s*(\d+):', # Win filename, maybe starting with spaces
r'([^\s]+):\s*(\d+):', # filename or path, ltrim
r'^\s*(\S.*?):\s*(\d+):', # Win abs path with embedded spaces, ltrim
]

file_line_progs = None

def goto_file_line(self, event=None):
if self.file_line_progs is None:
l = []
for pat in self.file_line_pats:
l.append(re.compile(pat, re.IGNORECASE))
self.file_line_progs = l
# x, y = self.event.x, self.event.y
# self.text.mark_set("insert", "@%d,%d" % (x, y))
line = self.text.get("insert linestart", "insert lineend")
result = self._file_line_helper(line)
if not result:
# Try the previous line. This is handy e.g. in tracebacks,
# where you tend to right-click on the displayed source line
line = self.text.get("insert -1line linestart",
"insert -1line lineend")
result = self._file_line_helper(line)
if not result:
tkMessageBox.showerror(
"No special line",
"The line you point at doesn't look like "
"a valid file name followed by a line number.",
master=self.text)
return
filename, lineno = result
edit = self.flist.open(filename)
edit.gotoline(lineno)

def _file_line_helper(self, line):
for prog in self.file_line_progs:
match = prog.search(line)
if match:
filename, lineno = match.group(1, 2)
try:
f = open(filename, "r")
f.close()
break
except OSError:
continue
else:
return None
try:
return filename, int(lineno)
except TypeError:
return None

# These classes are currently not used but might come in handy

class OnDemandOutputWindow:

tagdefs = {
# XXX Should use IdlePrefs.ColorPrefs
"stdout": {"foreground": "blue"},
"stderr": {"foreground": "#007700"},
}

def __init__(self, flist):
self.flist = flist
self.owin = None

def write(self, s, tags, mark):
if not self.owin:
self.setup()
self.owin.write(s, tags, mark)

def setup(self):
self.owin = owin = OutputWindow(self.flist)
text = owin.text
for tag, cnf in self.tagdefs.items():
if cnf:
text.tag_configure(tag, **cnf)
text.tag_raise('sel')
self.write = self.owin.write