class InputDialog(_TkDialog):
def __init__(self, message, default='', hidden=False):
_TkDialog.__init__(self, message, default, hidden=hidden)
def _create_selector(self, parent, default, hidden):
self._entry = Entry(parent, show='*' if hidden else '')
self._entry.insert(0, default)
self._entry.select_range(0, END)
return self._entry
def _get_value(self):
return self._entry.get()
class InputDialog(_TkDialog):
def __init__(self, message, default='', hidden=False):
_TkDialog.__init__(self, message, default, hidden=hidden)
def _create_selector(self, parent, default, hidden):
self._entry = Entry(parent, show='*' if hidden else '')
self._entry.insert(0, default)
self._entry.select_range(0, END)
return self._entry
def _get_value(self):
return self._entry.get()
class CFGEditor(object):
"""
A dialog window for creating and editing context free grammars.
``CFGEditor`` imposes the following restrictions:
- All nonterminals must be strings consisting of word
characters.
- All terminals must be strings consisting of word characters
and space characters.
"""
# Regular expressions used by _analyze_line. Precompile them, so
# we can process the text faster.
ARROW = SymbolWidget.SYMBOLS['rightarrow']
_LHS_RE = re.compile(r"(^\s*\w+\s*)(->|("+ARROW+"))")
_ARROW_RE = re.compile("\s*(->|("+ARROW+"))\s*")
_PRODUCTION_RE = re.compile(r"(^\s*\w+\s*)" + # LHS
"(->|("+ARROW+"))\s*" + # arrow
r"((\w+|'[\w ]*'|\"[\w ]*\"|\|)\s*)*$") # RHS
_TOKEN_RE = re.compile("\\w+|->|'[\\w ]+'|\"[\\w ]+\"|("+ARROW+")")
_BOLD = ('helvetica', -12, 'bold')
def __init__(self, parent, cfg=None, set_cfg_callback=None):
self._parent = parent
if cfg is not None: self._cfg = cfg
else: self._cfg = CFG(Nonterminal('S'), [])
self._set_cfg_callback = set_cfg_callback
self._highlight_matching_nonterminals = 1
# Create the top-level window.
self._top = Toplevel(parent)
self._init_bindings()
self._init_startframe()
self._startframe.pack(side='top', fill='x', expand=0)
self._init_prodframe()
self._prodframe.pack(side='top', fill='both', expand=1)
self._init_buttons()
self._buttonframe.pack(side='bottom', fill='x', expand=0)
self._textwidget.focus()
def _init_startframe(self):
frame = self._startframe = Frame(self._top)
self._start = Entry(frame)
self._start.pack(side='right')
Label(frame, text='Start Symbol:').pack(side='right')
Label(frame, text='Productions:').pack(side='left')
self._start.insert(0, self._cfg.start().symbol())
def _init_buttons(self):
frame = self._buttonframe = Frame(self._top)
Button(frame, text='Ok', command=self._ok,
underline=0, takefocus=0).pack(side='left')
Button(frame, text='Apply', command=self._apply,
underline=0, takefocus=0).pack(side='left')
Button(frame, text='Reset', command=self._reset,
underline=0, takefocus=0,).pack(side='left')
Button(frame, text='Cancel', command=self._cancel,
underline=0, takefocus=0).pack(side='left')
Button(frame, text='Help', command=self._help,
underline=0, takefocus=0).pack(side='right')
def _init_bindings(self):
self._top.title('CFG Editor')
self._top.bind('<Control-q>', self._cancel)
self._top.bind('<Alt-q>', self._cancel)
self._top.bind('<Control-d>', self._cancel)
#self._top.bind('<Control-x>', self._cancel)
self._top.bind('<Alt-x>', self._cancel)
self._top.bind('<Escape>', self._cancel)
#self._top.bind('<Control-c>', self._cancel)
self._top.bind('<Alt-c>', self._cancel)
self._top.bind('<Control-o>', self._ok)
self._top.bind('<Alt-o>', self._ok)
self._top.bind('<Control-a>', self._apply)
self._top.bind('<Alt-a>', self._apply)
self._top.bind('<Control-r>', self._reset)
self._top.bind('<Alt-r>', self._reset)
self._top.bind('<Control-h>', self._help)
self._top.bind('<Alt-h>', self._help)
self._top.bind('<F1>', self._help)
def _init_prodframe(self):
self._prodframe = Frame(self._top)
# Create the basic Text widget & scrollbar.
self._textwidget = Text(self._prodframe, background='#e0e0e0',
exportselection=1)
self._textscroll = Scrollbar(self._prodframe, takefocus=0,
orient='vertical')
self._textwidget.config(yscrollcommand = self._textscroll.set)
self._textscroll.config(command=self._textwidget.yview)
self._textscroll.pack(side='right', fill='y')
self._textwidget.pack(expand=1, fill='both', side='left')
# Initialize the colorization tags. Each nonterminal gets its
# own tag, so they aren't listed here.
self._textwidget.tag_config('terminal', foreground='#006000')
self._textwidget.tag_config('arrow', font='symbol')
self._textwidget.tag_config('error', background='red')
# Keep track of what line they're on. We use that to remember
# to re-analyze a line whenever they leave it.
self._linenum = 0
# Expand "->" to an arrow.
self._top.bind('>', self._replace_arrows)
# Re-colorize lines when appropriate.
self._top.bind('<<Paste>>', self._analyze)
self._top.bind('<KeyPress>', self._check_analyze)
self._top.bind('<ButtonPress>', self._check_analyze)
# Tab cycles focus. (why doesn't this work??)
def cycle(e, textwidget=self._textwidget):
textwidget.tk_focusNext().focus()
self._textwidget.bind('<Tab>', cycle)
prod_tuples = [(p.lhs(),[p.rhs()]) for p in self._cfg.productions()]
for i in range(len(prod_tuples)-1,0,-1):
if (prod_tuples[i][0] == prod_tuples[i-1][0]):
if () in prod_tuples[i][1]: continue
if () in prod_tuples[i-1][1]: continue
print(prod_tuples[i-1][1])
print(prod_tuples[i][1])
prod_tuples[i-1][1].extend(prod_tuples[i][1])
del prod_tuples[i]
for lhs, rhss in prod_tuples:
print(lhs, rhss)
s = '%s ->' % lhs
for rhs in rhss:
for elt in rhs:
if isinstance(elt, Nonterminal): s += ' %s' % elt
else: s += ' %r' % elt
s += ' |'
s = s[:-2] + '\n'
self._textwidget.insert('end', s)
self._analyze()
# # Add the producitons to the text widget, and colorize them.
# prod_by_lhs = {}
# for prod in self._cfg.productions():
# if len(prod.rhs()) > 0:
# prod_by_lhs.setdefault(prod.lhs(),[]).append(prod)
# for (lhs, prods) in prod_by_lhs.items():
# self._textwidget.insert('end', '%s ->' % lhs)
# self._textwidget.insert('end', self._rhs(prods[0]))
# for prod in prods[1:]:
# print '\t|'+self._rhs(prod),
# self._textwidget.insert('end', '\t|'+self._rhs(prod))
# print
# self._textwidget.insert('end', '\n')
# for prod in self._cfg.productions():
# if len(prod.rhs()) == 0:
# self._textwidget.insert('end', '%s' % prod)
# self._analyze()
# def _rhs(self, prod):
# s = ''
# for elt in prod.rhs():
# if isinstance(elt, Nonterminal): s += ' %s' % elt.symbol()
# else: s += ' %r' % elt
# return s
def _clear_tags(self, linenum):
"""
Remove all tags (except ``arrow`` and ``sel``) from the given
line of the text widget used for editing the productions.
"""
start = '%d.0'%linenum
end = '%d.end'%linenum
for tag in self._textwidget.tag_names():
if tag not in ('arrow', 'sel'):
self._textwidget.tag_remove(tag, start, end)
def _check_analyze(self, *e):
"""
Check if we've moved to a new line. If we have, then remove
all colorization from the line we moved to, and re-colorize
the line that we moved from.
"""
linenum = int(self._textwidget.index('insert').split('.')[0])
if linenum != self._linenum:
self._clear_tags(linenum)
self._analyze_line(self._linenum)
self._linenum = linenum
def _replace_arrows(self, *e):
"""
Replace any ``'->'`` text strings with arrows (char \\256, in
symbol font). This searches the whole buffer, but is fast
enough to be done anytime they press '>'.
"""
arrow = '1.0'
while True:
arrow = self._textwidget.search('->', arrow, 'end+1char')
if arrow == '': break
self._textwidget.delete(arrow, arrow+'+2char')
self._textwidget.insert(arrow, self.ARROW, 'arrow')
self._textwidget.insert(arrow, '\t')
arrow = '1.0'
while True:
arrow = self._textwidget.search(self.ARROW, arrow+'+1char',
'end+1char')
if arrow == '': break
self._textwidget.tag_add('arrow', arrow, arrow+'+1char')
def _analyze_token(self, match, linenum):
"""
Given a line number and a regexp match for a token on that
line, colorize the token. Note that the regexp match gives us
the token's text, start index (on the line), and end index (on
the line).
"""
# What type of token is it?
if match.group()[0] in "'\"": tag = 'terminal'
elif match.group() in ('->', self.ARROW): tag = 'arrow'
else:
# If it's a nonterminal, then set up new bindings, so we
# can highlight all instances of that nonterminal when we
# put the mouse over it.
tag = 'nonterminal_'+match.group()
if tag not in self._textwidget.tag_names():
self._init_nonterminal_tag(tag)
start = '%d.%d' % (linenum, match.start())
end = '%d.%d' % (linenum, match.end())
self._textwidget.tag_add(tag, start, end)
def _init_nonterminal_tag(self, tag, foreground='blue'):
self._textwidget.tag_config(tag, foreground=foreground,
font=CFGEditor._BOLD)
if not self._highlight_matching_nonterminals:
return
def enter(e, textwidget=self._textwidget, tag=tag):
textwidget.tag_config(tag, background='#80ff80')
def leave(e, textwidget=self._textwidget, tag=tag):
textwidget.tag_config(tag, background='')
self._textwidget.tag_bind(tag, '<Enter>', enter)
self._textwidget.tag_bind(tag, '<Leave>', leave)
def _analyze_line(self, linenum):
"""
Colorize a given line.
"""
# Get rid of any tags that were previously on the line.
self._clear_tags(linenum)
# Get the line line's text string.
line = self._textwidget.get(repr(linenum)+'.0', repr(linenum)+'.end')
# If it's a valid production, then colorize each token.
if CFGEditor._PRODUCTION_RE.match(line):
# It's valid; Use _TOKEN_RE to tokenize the production,
# and call analyze_token on each token.
def analyze_token(match, self=self, linenum=linenum):
self._analyze_token(match, linenum)
return ''
CFGEditor._TOKEN_RE.sub(analyze_token, line)
elif line.strip() != '':
# It's invalid; show the user where the error is.
self._mark_error(linenum, line)
def _mark_error(self, linenum, line):
"""
Mark the location of an error in a line.
"""
arrowmatch = CFGEditor._ARROW_RE.search(line)
if not arrowmatch:
# If there's no arrow at all, highlight the whole line.
start = '%d.0' % linenum
end = '%d.end' % linenum
elif not CFGEditor._LHS_RE.match(line):
# Otherwise, if the LHS is bad, highlight it.
start = '%d.0' % linenum
end = '%d.%d' % (linenum, arrowmatch.start())
else:
# Otherwise, highlight the RHS.
start = '%d.%d' % (linenum, arrowmatch.end())
end = '%d.end' % linenum
# If we're highlighting 0 chars, highlight the whole line.
if self._textwidget.compare(start, '==', end):
start = '%d.0' % linenum
end = '%d.end' % linenum
self._textwidget.tag_add('error', start, end)
def _analyze(self, *e):
"""
Replace ``->`` with arrows, and colorize the entire buffer.
"""
self._replace_arrows()
numlines = int(self._textwidget.index('end').split('.')[0])
for linenum in range(1, numlines+1): # line numbers start at 1.
self._analyze_line(linenum)
def _parse_productions(self):
"""
Parse the current contents of the textwidget buffer, to create
a list of productions.
"""
productions = []
# Get the text, normalize it, and split it into lines.
text = self._textwidget.get('1.0', 'end')
text = re.sub(self.ARROW, '->', text)
text = re.sub('\t', ' ', text)
lines = text.split('\n')
# Convert each line to a CFG production
for line in lines:
line = line.strip()
if line=='': continue
productions += _read_cfg_production(line)
#if line.strip() == '': continue
#if not CFGEditor._PRODUCTION_RE.match(line):
# raise ValueError('Bad production string %r' % line)
#
#(lhs_str, rhs_str) = line.split('->')
#lhs = Nonterminal(lhs_str.strip())
#rhs = []
#def parse_token(match, rhs=rhs):
# token = match.group()
# if token[0] in "'\"": rhs.append(token[1:-1])
# else: rhs.append(Nonterminal(token))
# return ''
#CFGEditor._TOKEN_RE.sub(parse_token, rhs_str)
#
#productions.append(Production(lhs, *rhs))
return productions
def _destroy(self, *e):
if self._top is None: return
self._top.destroy()
self._top = None
def _ok(self, *e):
self._apply()
self._destroy()
def _apply(self, *e):
productions = self._parse_productions()
start = Nonterminal(self._start.get())
cfg = CFG(start, productions)
if self._set_cfg_callback is not None:
self._set_cfg_callback(cfg)
def _reset(self, *e):
self._textwidget.delete('1.0', 'end')
for production in self._cfg.productions():
self._textwidget.insert('end', '%s\n' % production)
self._analyze()
if self._set_cfg_callback is not None:
self._set_cfg_callback(self._cfg)
def _cancel(self, *e):
try: self._reset()
except: pass
self._destroy()
def _help(self, *e):
# The default font's not very legible; try using 'fixed' instead.
try:
ShowText(self._parent, 'Help: Chart Parser Demo',
(_CFGEditor_HELP).strip(), width=75, font='fixed')
except:
ShowText(self._parent, 'Help: Chart Parser Demo',
(_CFGEditor_HELP).strip(), width=75)
class LintGui(object):
"""Build and control a window to interact with pylint"""
def __init__(self, root=None):
"""init"""
self.root = root or Tk()
self.root.title('Pylint')
#reporter
self.reporter = None
#message queue for output from reporter
self.msg_queue = six.moves.queue.Queue()
self.msgs = []
self.visible_msgs = []
self.filenames = []
self.rating = StringVar()
self.tabs = {}
self.report_stream = BasicStream(self)
#gui objects
self.lb_messages = None
self.showhistory = None
self.results = None
self.btnRun = None
self.information_box = None
self.convention_box = None
self.refactor_box = None
self.warning_box = None
self.error_box = None
self.fatal_box = None
self.txtModule = None
self.status = None
self.msg_type_dict = None
self.init_gui()
def init_gui(self):
"""init helper"""
window = PanedWindow(self.root, orient="vertical")
window.pack(side=TOP, fill=BOTH, expand=True)
top_pane = Frame(window)
window.add(top_pane)
mid_pane = Frame(window)
window.add(mid_pane)
bottom_pane = Frame(window)
window.add(bottom_pane)
#setting up frames
top_frame = Frame(top_pane)
mid_frame = Frame(top_pane)
history_frame = Frame(top_pane)
radio_frame = Frame(mid_pane)
rating_frame = Frame(mid_pane)
res_frame = Frame(mid_pane)
check_frame = Frame(bottom_pane)
msg_frame = Frame(bottom_pane)
btn_frame = Frame(bottom_pane)
top_frame.pack(side=TOP, fill=X)
mid_frame.pack(side=TOP, fill=X)
history_frame.pack(side=TOP, fill=BOTH, expand=True)
radio_frame.pack(side=TOP, fill=X)
rating_frame.pack(side=TOP, fill=X)
res_frame.pack(side=TOP, fill=BOTH, expand=True)
check_frame.pack(side=TOP, fill=X)
msg_frame.pack(side=TOP, fill=BOTH, expand=True)
btn_frame.pack(side=TOP, fill=X)
# Binding F5 application-wide to run lint
self.root.bind('<F5>', self.run_lint)
#Message ListBox
rightscrollbar = Scrollbar(msg_frame)
rightscrollbar.pack(side=RIGHT, fill=Y)
bottomscrollbar = Scrollbar(msg_frame, orient=HORIZONTAL)
bottomscrollbar.pack(side=BOTTOM, fill=X)
self.lb_messages = Listbox(
msg_frame,
yscrollcommand=rightscrollbar.set,
xscrollcommand=bottomscrollbar.set,
bg="white")
self.lb_messages.bind("<Double-Button-1>", self.show_sourcefile)
self.lb_messages.pack(expand=True, fill=BOTH)
rightscrollbar.config(command=self.lb_messages.yview)
bottomscrollbar.config(command=self.lb_messages.xview)
#History ListBoxes
rightscrollbar2 = Scrollbar(history_frame)
rightscrollbar2.pack(side=RIGHT, fill=Y)
bottomscrollbar2 = Scrollbar(history_frame, orient=HORIZONTAL)
bottomscrollbar2.pack(side=BOTTOM, fill=X)
self.showhistory = Listbox(
history_frame,
yscrollcommand=rightscrollbar2.set,
xscrollcommand=bottomscrollbar2.set,
bg="white")
self.showhistory.pack(expand=True, fill=BOTH)
rightscrollbar2.config(command=self.showhistory.yview)
bottomscrollbar2.config(command=self.showhistory.xview)
self.showhistory.bind('<Double-Button-1>', self.select_recent_file)
self.set_history_window()
#status bar
self.status = Label(self.root, text="", bd=1, relief=SUNKEN, anchor=W)
self.status.pack(side=BOTTOM, fill=X)
#labelbl_ratingls
lbl_rating_label = Label(rating_frame, text='Rating:')
lbl_rating_label.pack(side=LEFT)
lbl_rating = Label(rating_frame, textvariable=self.rating)
lbl_rating.pack(side=LEFT)
Label(mid_frame, text='Recently Used:').pack(side=LEFT)
Label(top_frame, text='Module or package').pack(side=LEFT)
#file textbox
self.txt_module = Entry(top_frame, background='white')
self.txt_module.bind('<Return>', self.run_lint)
self.txt_module.pack(side=LEFT, expand=True, fill=X)
#results box
rightscrollbar = Scrollbar(res_frame)
rightscrollbar.pack(side=RIGHT, fill=Y)
bottomscrollbar = Scrollbar(res_frame, orient=HORIZONTAL)
bottomscrollbar.pack(side=BOTTOM, fill=X)
self.results = Listbox(
res_frame,
yscrollcommand=rightscrollbar.set,
xscrollcommand=bottomscrollbar.set,
bg="white", font="Courier")
self.results.pack(expand=True, fill=BOTH, side=BOTTOM)
rightscrollbar.config(command=self.results.yview)
bottomscrollbar.config(command=self.results.xview)
#buttons
Button(top_frame, text='Open', command=self.file_open).pack(side=LEFT)
Button(top_frame, text='Open Package',
command=(lambda: self.file_open(package=True))).pack(side=LEFT)
self.btnRun = Button(top_frame, text='Run', command=self.run_lint)
self.btnRun.pack(side=LEFT)
Button(btn_frame, text='Quit', command=self.quit).pack(side=BOTTOM)
#radio buttons
self.information_box = IntVar()
self.convention_box = IntVar()
self.refactor_box = IntVar()
self.warning_box = IntVar()
self.error_box = IntVar()
self.fatal_box = IntVar()
i = Checkbutton(check_frame, text="Information", fg=COLORS['(I)'],
variable=self.information_box, command=self.refresh_msg_window)
c = Checkbutton(check_frame, text="Convention", fg=COLORS['(C)'],
variable=self.convention_box, command=self.refresh_msg_window)
r = Checkbutton(check_frame, text="Refactor", fg=COLORS['(R)'],
variable=self.refactor_box, command=self.refresh_msg_window)
w = Checkbutton(check_frame, text="Warning", fg=COLORS['(W)'],
variable=self.warning_box, command=self.refresh_msg_window)
e = Checkbutton(check_frame, text="Error", fg=COLORS['(E)'],
variable=self.error_box, command=self.refresh_msg_window)
f = Checkbutton(check_frame, text="Fatal", fg=COLORS['(F)'],
variable=self.fatal_box, command=self.refresh_msg_window)
i.select()
c.select()
r.select()
w.select()
e.select()
f.select()
i.pack(side=LEFT)
c.pack(side=LEFT)
r.pack(side=LEFT)
w.pack(side=LEFT)
e.pack(side=LEFT)
f.pack(side=LEFT)
#check boxes
self.box = StringVar()
# XXX should be generated
report = Radiobutton(
radio_frame, text="Report", variable=self.box,
value="Report", command=self.refresh_results_window)
raw_met = Radiobutton(
radio_frame, text="Raw metrics", variable=self.box,
value="Raw metrics", command=self.refresh_results_window)
dup = Radiobutton(
radio_frame, text="Duplication", variable=self.box,
value="Duplication", command=self.refresh_results_window)
ext = Radiobutton(
radio_frame, text="External dependencies",
variable=self.box, value="External dependencies",
command=self.refresh_results_window)
stat = Radiobutton(
radio_frame, text="Statistics by type",
variable=self.box, value="Statistics by type",
command=self.refresh_results_window)
msg_cat = Radiobutton(
radio_frame, text="Messages by category",
variable=self.box, value="Messages by category",
command=self.refresh_results_window)
msg = Radiobutton(
radio_frame, text="Messages", variable=self.box,
value="Messages", command=self.refresh_results_window)
source_file = Radiobutton(
radio_frame, text="Source File", variable=self.box,
value="Source File", command=self.refresh_results_window)
report.select()
report.grid(column=0, row=0, sticky=W)
raw_met.grid(column=1, row=0, sticky=W)
dup.grid(column=2, row=0, sticky=W)
msg.grid(column=3, row=0, sticky=W)
stat.grid(column=0, row=1, sticky=W)
msg_cat.grid(column=1, row=1, sticky=W)
ext.grid(column=2, row=1, sticky=W)
source_file.grid(column=3, row=1, sticky=W)
#dictionary for check boxes and associated error term
self.msg_type_dict = {
'I': lambda: self.information_box.get() == 1,
'C': lambda: self.convention_box.get() == 1,
'R': lambda: self.refactor_box.get() == 1,
'E': lambda: self.error_box.get() == 1,
'W': lambda: self.warning_box.get() == 1,
'F': lambda: self.fatal_box.get() == 1
}
self.txt_module.focus_set()
def select_recent_file(self, event): # pylint: disable=unused-argument
"""adds the selected file in the history listbox to the Module box"""
if not self.showhistory.size():
return
selected = self.showhistory.curselection()
item = self.showhistory.get(selected)
#update module
self.txt_module.delete(0, END)
self.txt_module.insert(0, item)
def refresh_msg_window(self):
"""refresh the message window with current output"""
#clear the window
self.lb_messages.delete(0, END)
self.visible_msgs = []
for msg in self.msgs:
if self.msg_type_dict.get(msg.C)():
self.visible_msgs.append(msg)
msg_str = convert_to_string(msg)
self.lb_messages.insert(END, msg_str)
fg_color = COLORS.get(msg_str[:3], 'black')
self.lb_messages.itemconfigure(END, fg=fg_color)
def refresh_results_window(self):
"""refresh the results window with current output"""
#clear the window
self.results.delete(0, END)
try:
for res in self.tabs[self.box.get()]:
self.results.insert(END, res)
except KeyError:
pass
def process_incoming(self):
"""process the incoming messages from running pylint"""
while self.msg_queue.qsize():
try:
msg = self.msg_queue.get(0)
if msg == "DONE":
self.report_stream.output_contents()
return False
#adding message to list of msgs
self.msgs.append(msg)
#displaying msg if message type is selected in check box
if self.msg_type_dict.get(msg.C)():
self.visible_msgs.append(msg)
msg_str = convert_to_string(msg)
self.lb_messages.insert(END, msg_str)
fg_color = COLORS.get(msg_str[:3], 'black')
self.lb_messages.itemconfigure(END, fg=fg_color)
except six.moves.queue.Empty:
pass
return True
def periodic_call(self):
"""determine when to unlock the run button"""
if self.process_incoming():
self.root.after(100, self.periodic_call)
else:
#enabling button so it can be run again
self.btnRun.config(state=NORMAL)
def mainloop(self):
"""launch the mainloop of the application"""
self.root.mainloop()
def quit(self, _=None):
"""quit the application"""
self.root.quit()
def halt(self): # pylint: disable=no-self-use
"""program halt placeholder"""
return
def file_open(self, package=False, _=None):
"""launch a file browser"""
if not package:
filename = askopenfilename(parent=self.root,
filetypes=[('pythonfiles', '*.py'),
('allfiles', '*')],
title='Select Module')
else:
filename = askdirectory(title="Select A Folder", mustexist=1)
if filename == ():
return
self.txt_module.delete(0, END)
self.txt_module.insert(0, filename)
def update_filenames(self):
"""update the list of recent filenames"""
filename = self.txt_module.get()
if not filename:
filename = os.getcwd()
if filename+'\n' in self.filenames:
index = self.filenames.index(filename+'\n')
self.filenames.pop(index)
#ensure only 10 most recent are stored
if len(self.filenames) == 10:
self.filenames.pop()
self.filenames.insert(0, filename+'\n')
def set_history_window(self):
"""update the history window with info from the history file"""
#clear the window
self.showhistory.delete(0, END)
# keep the last 10 most recent files
try:
view_history = open(HOME+HISTORY, 'r')
for hist in view_history.readlines():
if not hist in self.filenames:
self.filenames.append(hist)
self.showhistory.insert(END, hist.split('\n')[0])
view_history.close()
except IOError:
# do nothing since history file will be created later
return
def run_lint(self, _=None):
"""launches pylint"""
self.update_filenames()
self.root.configure(cursor='watch')
self.reporter = GUIReporter(self, output=self.report_stream)
module = self.txt_module.get()
if not module:
module = os.getcwd()
#cleaning up msgs and windows
self.msgs = []
self.visible_msgs = []
self.lb_messages.delete(0, END)
self.tabs = {}
self.results.delete(0, END)
self.btnRun.config(state=DISABLED)
#setting up a worker thread to run pylint
worker = Thread(target=lint_thread, args=(module, self.reporter, self,))
self.periodic_call()
worker.start()
# Overwrite the .pylint-gui-history file with all the new recently added files
# in order from filenames but only save last 10 files
write_history = open(HOME+HISTORY, 'w')
write_history.writelines(self.filenames)
write_history.close()
self.set_history_window()
self.root.configure(cursor='')
def show_sourcefile(self, event=None): # pylint: disable=unused-argument
selected = self.lb_messages.curselection()
if not selected:
return
msg = self.visible_msgs[int(selected[0])]
scroll = msg.line - 3
if scroll < 0:
scroll = 0
self.tabs["Source File"] = open(msg.path, "r").readlines()
self.box.set("Source File")
self.refresh_results_window()
self.results.yview(scroll)
self.results.select_set(msg.line - 1)
class LintGui(object):
"""Build and control a window to interact with pylint"""
def __init__(self, root=None):
"""init"""
self.root = root or Tk()
self.root.title('Pylint')
#reporter
self.reporter = None
#message queue for output from reporter
self.msg_queue = six.moves.queue.Queue()
self.msgs = []
self.visible_msgs = []
self.filenames = []
self.rating = StringVar()
self.tabs = {}
self.report_stream = BasicStream(self)
#gui objects
self.lb_messages = None
self.showhistory = None
self.results = None
self.btnRun = None
self.information_box = None
self.convention_box = None
self.refactor_box = None
self.warning_box = None
self.error_box = None
self.fatal_box = None
self.txtModule = None
self.status = None
self.msg_type_dict = None
self.init_gui()
def init_gui(self):
"""init helper"""
window = PanedWindow(self.root, orient="vertical")
window.pack(side=TOP, fill=BOTH, expand=True)
top_pane = Frame(window)
window.add(top_pane)
mid_pane = Frame(window)
window.add(mid_pane)
bottom_pane = Frame(window)
window.add(bottom_pane)
#setting up frames
top_frame = Frame(top_pane)
mid_frame = Frame(top_pane)
history_frame = Frame(top_pane)
radio_frame = Frame(mid_pane)
rating_frame = Frame(mid_pane)
res_frame = Frame(mid_pane)
check_frame = Frame(bottom_pane)
msg_frame = Frame(bottom_pane)
btn_frame = Frame(bottom_pane)
top_frame.pack(side=TOP, fill=X)
mid_frame.pack(side=TOP, fill=X)
history_frame.pack(side=TOP, fill=BOTH, expand=True)
radio_frame.pack(side=TOP, fill=X)
rating_frame.pack(side=TOP, fill=X)
res_frame.pack(side=TOP, fill=BOTH, expand=True)
check_frame.pack(side=TOP, fill=X)
msg_frame.pack(side=TOP, fill=BOTH, expand=True)
btn_frame.pack(side=TOP, fill=X)
# Binding F5 application-wide to run lint
self.root.bind('<F5>', self.run_lint)
#Message ListBox
rightscrollbar = Scrollbar(msg_frame)
rightscrollbar.pack(side=RIGHT, fill=Y)
bottomscrollbar = Scrollbar(msg_frame, orient=HORIZONTAL)
bottomscrollbar.pack(side=BOTTOM, fill=X)
self.lb_messages = Listbox(msg_frame,
yscrollcommand=rightscrollbar.set,
xscrollcommand=bottomscrollbar.set,
bg="white")
self.lb_messages.bind("<Double-Button-1>", self.show_sourcefile)
self.lb_messages.pack(expand=True, fill=BOTH)
rightscrollbar.config(command=self.lb_messages.yview)
bottomscrollbar.config(command=self.lb_messages.xview)
#History ListBoxes
rightscrollbar2 = Scrollbar(history_frame)
rightscrollbar2.pack(side=RIGHT, fill=Y)
bottomscrollbar2 = Scrollbar(history_frame, orient=HORIZONTAL)
bottomscrollbar2.pack(side=BOTTOM, fill=X)
self.showhistory = Listbox(history_frame,
yscrollcommand=rightscrollbar2.set,
xscrollcommand=bottomscrollbar2.set,
bg="white")
self.showhistory.pack(expand=True, fill=BOTH)
rightscrollbar2.config(command=self.showhistory.yview)
bottomscrollbar2.config(command=self.showhistory.xview)
self.showhistory.bind('<Double-Button-1>', self.select_recent_file)
self.set_history_window()
#status bar
self.status = Label(self.root, text="", bd=1, relief=SUNKEN, anchor=W)
self.status.pack(side=BOTTOM, fill=X)
#labelbl_ratingls
lbl_rating_label = Label(rating_frame, text='Rating:')
lbl_rating_label.pack(side=LEFT)
lbl_rating = Label(rating_frame, textvariable=self.rating)
lbl_rating.pack(side=LEFT)
Label(mid_frame, text='Recently Used:').pack(side=LEFT)
Label(top_frame, text='Module or package').pack(side=LEFT)
#file textbox
self.txt_module = Entry(top_frame, background='white')
self.txt_module.bind('<Return>', self.run_lint)
self.txt_module.pack(side=LEFT, expand=True, fill=X)
#results box
rightscrollbar = Scrollbar(res_frame)
rightscrollbar.pack(side=RIGHT, fill=Y)
bottomscrollbar = Scrollbar(res_frame, orient=HORIZONTAL)
bottomscrollbar.pack(side=BOTTOM, fill=X)
self.results = Listbox(res_frame,
yscrollcommand=rightscrollbar.set,
xscrollcommand=bottomscrollbar.set,
bg="white",
font="Courier")
self.results.pack(expand=True, fill=BOTH, side=BOTTOM)
rightscrollbar.config(command=self.results.yview)
bottomscrollbar.config(command=self.results.xview)
#buttons
Button(top_frame, text='Open', command=self.file_open).pack(side=LEFT)
Button(top_frame,
text='Open Package',
command=(lambda: self.file_open(package=True))).pack(side=LEFT)
self.btnRun = Button(top_frame, text='Run', command=self.run_lint)
self.btnRun.pack(side=LEFT)
Button(btn_frame, text='Quit', command=self.quit).pack(side=BOTTOM)
#radio buttons
self.information_box = IntVar()
self.convention_box = IntVar()
self.refactor_box = IntVar()
self.warning_box = IntVar()
self.error_box = IntVar()
self.fatal_box = IntVar()
i = Checkbutton(check_frame,
text="Information",
fg=COLORS['(I)'],
variable=self.information_box,
command=self.refresh_msg_window)
c = Checkbutton(check_frame,
text="Convention",
fg=COLORS['(C)'],
variable=self.convention_box,
command=self.refresh_msg_window)
r = Checkbutton(check_frame,
text="Refactor",
fg=COLORS['(R)'],
variable=self.refactor_box,
command=self.refresh_msg_window)
w = Checkbutton(check_frame,
text="Warning",
fg=COLORS['(W)'],
variable=self.warning_box,
command=self.refresh_msg_window)
e = Checkbutton(check_frame,
text="Error",
fg=COLORS['(E)'],
variable=self.error_box,
command=self.refresh_msg_window)
f = Checkbutton(check_frame,
text="Fatal",
fg=COLORS['(F)'],
variable=self.fatal_box,
command=self.refresh_msg_window)
i.select()
c.select()
r.select()
w.select()
e.select()
f.select()
i.pack(side=LEFT)
c.pack(side=LEFT)
r.pack(side=LEFT)
w.pack(side=LEFT)
e.pack(side=LEFT)
f.pack(side=LEFT)
#check boxes
self.box = StringVar()
# XXX should be generated
report = Radiobutton(radio_frame,
text="Report",
variable=self.box,
value="Report",
command=self.refresh_results_window)
raw_met = Radiobutton(radio_frame,
text="Raw metrics",
variable=self.box,
value="Raw metrics",
command=self.refresh_results_window)
dup = Radiobutton(radio_frame,
text="Duplication",
variable=self.box,
value="Duplication",
command=self.refresh_results_window)
ext = Radiobutton(radio_frame,
text="External dependencies",
variable=self.box,
value="External dependencies",
command=self.refresh_results_window)
stat = Radiobutton(radio_frame,
text="Statistics by type",
variable=self.box,
value="Statistics by type",
command=self.refresh_results_window)
msg_cat = Radiobutton(radio_frame,
text="Messages by category",
variable=self.box,
value="Messages by category",
command=self.refresh_results_window)
msg = Radiobutton(radio_frame,
text="Messages",
variable=self.box,
value="Messages",
command=self.refresh_results_window)
source_file = Radiobutton(radio_frame,
text="Source File",
variable=self.box,
value="Source File",
command=self.refresh_results_window)
report.select()
report.grid(column=0, row=0, sticky=W)
raw_met.grid(column=1, row=0, sticky=W)
dup.grid(column=2, row=0, sticky=W)
msg.grid(column=3, row=0, sticky=W)
stat.grid(column=0, row=1, sticky=W)
msg_cat.grid(column=1, row=1, sticky=W)
ext.grid(column=2, row=1, sticky=W)
source_file.grid(column=3, row=1, sticky=W)
#dictionary for check boxes and associated error term
self.msg_type_dict = {
'I': lambda: self.information_box.get() == 1,
'C': lambda: self.convention_box.get() == 1,
'R': lambda: self.refactor_box.get() == 1,
'E': lambda: self.error_box.get() == 1,
'W': lambda: self.warning_box.get() == 1,
'F': lambda: self.fatal_box.get() == 1
}
self.txt_module.focus_set()
def select_recent_file(self, event): # pylint: disable=unused-argument
"""adds the selected file in the history listbox to the Module box"""
if not self.showhistory.size():
return
selected = self.showhistory.curselection()
item = self.showhistory.get(selected)
#update module
self.txt_module.delete(0, END)
self.txt_module.insert(0, item)
def refresh_msg_window(self):
"""refresh the message window with current output"""
#clear the window
self.lb_messages.delete(0, END)
self.visible_msgs = []
for msg in self.msgs:
if self.msg_type_dict.get(msg.C)():
self.visible_msgs.append(msg)
msg_str = convert_to_string(msg)
self.lb_messages.insert(END, msg_str)
fg_color = COLORS.get(msg_str[:3], 'black')
self.lb_messages.itemconfigure(END, fg=fg_color)
def refresh_results_window(self):
"""refresh the results window with current output"""
#clear the window
self.results.delete(0, END)
try:
for res in self.tabs[self.box.get()]:
self.results.insert(END, res)
except KeyError:
pass
def process_incoming(self):
"""process the incoming messages from running pylint"""
while self.msg_queue.qsize():
try:
msg = self.msg_queue.get(0)
if msg == "DONE":
self.report_stream.output_contents()
return False
#adding message to list of msgs
self.msgs.append(msg)
#displaying msg if message type is selected in check box
if self.msg_type_dict.get(msg.C)():
self.visible_msgs.append(msg)
msg_str = convert_to_string(msg)
self.lb_messages.insert(END, msg_str)
fg_color = COLORS.get(msg_str[:3], 'black')
self.lb_messages.itemconfigure(END, fg=fg_color)
except six.moves.queue.Empty:
pass
return True
def periodic_call(self):
"""determine when to unlock the run button"""
if self.process_incoming():
self.root.after(100, self.periodic_call)
else:
#enabling button so it can be run again
self.btnRun.config(state=NORMAL)
def mainloop(self):
"""launch the mainloop of the application"""
self.root.mainloop()
def quit(self, _=None):
"""quit the application"""
self.root.quit()
def halt(self): # pylint: disable=no-self-use
"""program halt placeholder"""
return
def file_open(self, package=False, _=None):
"""launch a file browser"""
if not package:
filename = askopenfilename(parent=self.root,
filetypes=[('pythonfiles', '*.py'),
('allfiles', '*')],
title='Select Module')
else:
filename = askdirectory(title="Select A Folder", mustexist=1)
if filename == ():
return
self.txt_module.delete(0, END)
self.txt_module.insert(0, filename)
def update_filenames(self):
"""update the list of recent filenames"""
filename = self.txt_module.get()
if not filename:
filename = os.getcwd()
if filename + '\n' in self.filenames:
index = self.filenames.index(filename + '\n')
self.filenames.pop(index)
#ensure only 10 most recent are stored
if len(self.filenames) == 10:
self.filenames.pop()
self.filenames.insert(0, filename + '\n')
def set_history_window(self):
"""update the history window with info from the history file"""
#clear the window
self.showhistory.delete(0, END)
# keep the last 10 most recent files
try:
view_history = open(HOME + HISTORY, 'r')
for hist in view_history.readlines():
if hist not in self.filenames:
self.filenames.append(hist)
self.showhistory.insert(END, hist.split('\n')[0])
view_history.close()
except IOError:
# do nothing since history file will be created later
return
def run_lint(self, _=None):
"""launches pylint"""
self.update_filenames()
self.root.configure(cursor='watch')
self.reporter = GUIReporter(self, output=self.report_stream)
module = self.txt_module.get()
if not module:
module = os.getcwd()
#cleaning up msgs and windows
self.msgs = []
self.visible_msgs = []
self.lb_messages.delete(0, END)
self.tabs = {}
self.results.delete(0, END)
self.btnRun.config(state=DISABLED)
#setting up a worker thread to run pylint
worker = Thread(target=lint_thread,
args=(
module,
self.reporter,
self,
))
self.periodic_call()
worker.start()
# Overwrite the .pylint-gui-history file with all the new recently added files
# in order from filenames but only save last 10 files
write_history = open(HOME + HISTORY, 'w')
write_history.writelines(self.filenames)
write_history.close()
self.set_history_window()
self.root.configure(cursor='')
def show_sourcefile(self, event=None): # pylint: disable=unused-argument
selected = self.lb_messages.curselection()
if not selected:
return
msg = self.visible_msgs[int(selected[0])]
scroll = msg.line - 3
if scroll < 0:
scroll = 0
self.tabs["Source File"] = open(msg.path, "r").readlines()
self.box.set("Source File")
self.refresh_results_window()
self.results.yview(scroll)
self.results.select_set(msg.line - 1)
class CFGEditor(object):
"""
A dialog window for creating and editing context free grammars.
``CFGEditor`` imposes the following restrictions:
- All nonterminals must be strings consisting of word
characters.
- All terminals must be strings consisting of word characters
and space characters.
"""
# Regular expressions used by _analyze_line. Precompile them, so
# we can process the text faster.
ARROW = SymbolWidget.SYMBOLS['rightarrow']
_LHS_RE = re.compile(r"(^\s*\w+\s*)(->|(" + ARROW + "))")
_ARROW_RE = re.compile("\s*(->|(" + ARROW + "))\s*")
_PRODUCTION_RE = re.compile(
r"(^\s*\w+\s*)"
+ "(->|(" # LHS
+ ARROW
+ "))\s*"
+ r"((\w+|'[\w ]*'|\"[\w ]*\"|\|)\s*)*$" # arrow
) # RHS
_TOKEN_RE = re.compile("\\w+|->|'[\\w ]+'|\"[\\w ]+\"|(" + ARROW + ")")
_BOLD = ('helvetica', -12, 'bold')
def __init__(self, parent, cfg=None, set_cfg_callback=None):
self._parent = parent
if cfg is not None:
self._cfg = cfg
else:
self._cfg = CFG(Nonterminal('S'), [])
self._set_cfg_callback = set_cfg_callback
self._highlight_matching_nonterminals = 1
# Create the top-level window.
self._top = Toplevel(parent)
self._init_bindings()
self._init_startframe()
self._startframe.pack(side='top', fill='x', expand=0)
self._init_prodframe()
self._prodframe.pack(side='top', fill='both', expand=1)
self._init_buttons()
self._buttonframe.pack(side='bottom', fill='x', expand=0)
self._textwidget.focus()
def _init_startframe(self):
frame = self._startframe = Frame(self._top)
self._start = Entry(frame)
self._start.pack(side='right')
Label(frame, text='Start Symbol:').pack(side='right')
Label(frame, text='Productions:').pack(side='left')
self._start.insert(0, self._cfg.start().symbol())
def _init_buttons(self):
frame = self._buttonframe = Frame(self._top)
Button(frame, text='Ok', command=self._ok, underline=0, takefocus=0).pack(
side='left'
)
Button(frame, text='Apply', command=self._apply, underline=0, takefocus=0).pack(
side='left'
)
Button(frame, text='Reset', command=self._reset, underline=0, takefocus=0).pack(
side='left'
)
Button(
frame, text='Cancel', command=self._cancel, underline=0, takefocus=0
).pack(side='left')
Button(frame, text='Help', command=self._help, underline=0, takefocus=0).pack(
side='right'
)
def _init_bindings(self):
self._top.title('CFG Editor')
self._top.bind('<Control-q>', self._cancel)
self._top.bind('<Alt-q>', self._cancel)
self._top.bind('<Control-d>', self._cancel)
# self._top.bind('<Control-x>', self._cancel)
self._top.bind('<Alt-x>', self._cancel)
self._top.bind('<Escape>', self._cancel)
# self._top.bind('<Control-c>', self._cancel)
self._top.bind('<Alt-c>', self._cancel)
self._top.bind('<Control-o>', self._ok)
self._top.bind('<Alt-o>', self._ok)
self._top.bind('<Control-a>', self._apply)
self._top.bind('<Alt-a>', self._apply)
self._top.bind('<Control-r>', self._reset)
self._top.bind('<Alt-r>', self._reset)
self._top.bind('<Control-h>', self._help)
self._top.bind('<Alt-h>', self._help)
self._top.bind('<F1>', self._help)
def _init_prodframe(self):
self._prodframe = Frame(self._top)
# Create the basic Text widget & scrollbar.
self._textwidget = Text(
self._prodframe, background='#e0e0e0', exportselection=1
)
self._textscroll = Scrollbar(self._prodframe, takefocus=0, orient='vertical')
self._textwidget.config(yscrollcommand=self._textscroll.set)
self._textscroll.config(command=self._textwidget.yview)
self._textscroll.pack(side='right', fill='y')
self._textwidget.pack(expand=1, fill='both', side='left')
# Initialize the colorization tags. Each nonterminal gets its
# own tag, so they aren't listed here.
self._textwidget.tag_config('terminal', foreground='#006000')
self._textwidget.tag_config('arrow', font='symbol')
self._textwidget.tag_config('error', background='red')
# Keep track of what line they're on. We use that to remember
# to re-analyze a line whenever they leave it.
self._linenum = 0
# Expand "->" to an arrow.
self._top.bind('>', self._replace_arrows)
# Re-colorize lines when appropriate.
self._top.bind('<<Paste>>', self._analyze)
self._top.bind('<KeyPress>', self._check_analyze)
self._top.bind('<ButtonPress>', self._check_analyze)
# Tab cycles focus. (why doesn't this work??)
def cycle(e, textwidget=self._textwidget):
textwidget.tk_focusNext().focus()
self._textwidget.bind('<Tab>', cycle)
prod_tuples = [(p.lhs(), [p.rhs()]) for p in self._cfg.productions()]
for i in range(len(prod_tuples) - 1, 0, -1):
if prod_tuples[i][0] == prod_tuples[i - 1][0]:
if () in prod_tuples[i][1]:
continue
if () in prod_tuples[i - 1][1]:
continue
print(prod_tuples[i - 1][1])
print(prod_tuples[i][1])
prod_tuples[i - 1][1].extend(prod_tuples[i][1])
del prod_tuples[i]
for lhs, rhss in prod_tuples:
print(lhs, rhss)
s = '%s ->' % lhs
for rhs in rhss:
for elt in rhs:
if isinstance(elt, Nonterminal):
s += ' %s' % elt
else:
s += ' %r' % elt
s += ' |'
s = s[:-2] + '\n'
self._textwidget.insert('end', s)
self._analyze()
# # Add the producitons to the text widget, and colorize them.
# prod_by_lhs = {}
# for prod in self._cfg.productions():
# if len(prod.rhs()) > 0:
# prod_by_lhs.setdefault(prod.lhs(),[]).append(prod)
# for (lhs, prods) in prod_by_lhs.items():
# self._textwidget.insert('end', '%s ->' % lhs)
# self._textwidget.insert('end', self._rhs(prods[0]))
# for prod in prods[1:]:
# print '\t|'+self._rhs(prod),
# self._textwidget.insert('end', '\t|'+self._rhs(prod))
# print
# self._textwidget.insert('end', '\n')
# for prod in self._cfg.productions():
# if len(prod.rhs()) == 0:
# self._textwidget.insert('end', '%s' % prod)
# self._analyze()
# def _rhs(self, prod):
# s = ''
# for elt in prod.rhs():
# if isinstance(elt, Nonterminal): s += ' %s' % elt.symbol()
# else: s += ' %r' % elt
# return s
def _clear_tags(self, linenum):
"""
Remove all tags (except ``arrow`` and ``sel``) from the given
line of the text widget used for editing the productions.
"""
start = '%d.0' % linenum
end = '%d.end' % linenum
for tag in self._textwidget.tag_names():
if tag not in ('arrow', 'sel'):
self._textwidget.tag_remove(tag, start, end)
def _check_analyze(self, *e):
"""
Check if we've moved to a new line. If we have, then remove
all colorization from the line we moved to, and re-colorize
the line that we moved from.
"""
linenum = int(self._textwidget.index('insert').split('.')[0])
if linenum != self._linenum:
self._clear_tags(linenum)
self._analyze_line(self._linenum)
self._linenum = linenum
def _replace_arrows(self, *e):
"""
Replace any ``'->'`` text strings with arrows (char \\256, in
symbol font). This searches the whole buffer, but is fast
enough to be done anytime they press '>'.
"""
arrow = '1.0'
while True:
arrow = self._textwidget.search('->', arrow, 'end+1char')
if arrow == '':
break
self._textwidget.delete(arrow, arrow + '+2char')
self._textwidget.insert(arrow, self.ARROW, 'arrow')
self._textwidget.insert(arrow, '\t')
arrow = '1.0'
while True:
arrow = self._textwidget.search(self.ARROW, arrow + '+1char', 'end+1char')
if arrow == '':
break
self._textwidget.tag_add('arrow', arrow, arrow + '+1char')
def _analyze_token(self, match, linenum):
"""
Given a line number and a regexp match for a token on that
line, colorize the token. Note that the regexp match gives us
the token's text, start index (on the line), and end index (on
the line).
"""
# What type of token is it?
if match.group()[0] in "'\"":
tag = 'terminal'
elif match.group() in ('->', self.ARROW):
tag = 'arrow'
else:
# If it's a nonterminal, then set up new bindings, so we
# can highlight all instances of that nonterminal when we
# put the mouse over it.
tag = 'nonterminal_' + match.group()
if tag not in self._textwidget.tag_names():
self._init_nonterminal_tag(tag)
start = '%d.%d' % (linenum, match.start())
end = '%d.%d' % (linenum, match.end())
self._textwidget.tag_add(tag, start, end)
def _init_nonterminal_tag(self, tag, foreground='blue'):
self._textwidget.tag_config(tag, foreground=foreground, font=CFGEditor._BOLD)
if not self._highlight_matching_nonterminals:
return
def enter(e, textwidget=self._textwidget, tag=tag):
textwidget.tag_config(tag, background='#80ff80')
def leave(e, textwidget=self._textwidget, tag=tag):
textwidget.tag_config(tag, background='')
self._textwidget.tag_bind(tag, '<Enter>', enter)
self._textwidget.tag_bind(tag, '<Leave>', leave)
def _analyze_line(self, linenum):
"""
Colorize a given line.
"""
# Get rid of any tags that were previously on the line.
self._clear_tags(linenum)
# Get the line line's text string.
line = self._textwidget.get(repr(linenum) + '.0', repr(linenum) + '.end')
# If it's a valid production, then colorize each token.
if CFGEditor._PRODUCTION_RE.match(line):
# It's valid; Use _TOKEN_RE to tokenize the production,
# and call analyze_token on each token.
def analyze_token(match, self=self, linenum=linenum):
self._analyze_token(match, linenum)
return ''
CFGEditor._TOKEN_RE.sub(analyze_token, line)
elif line.strip() != '':
# It's invalid; show the user where the error is.
self._mark_error(linenum, line)
def _mark_error(self, linenum, line):
"""
Mark the location of an error in a line.
"""
arrowmatch = CFGEditor._ARROW_RE.search(line)
if not arrowmatch:
# If there's no arrow at all, highlight the whole line.
start = '%d.0' % linenum
end = '%d.end' % linenum
elif not CFGEditor._LHS_RE.match(line):
# Otherwise, if the LHS is bad, highlight it.
start = '%d.0' % linenum
end = '%d.%d' % (linenum, arrowmatch.start())
else:
# Otherwise, highlight the RHS.
start = '%d.%d' % (linenum, arrowmatch.end())
end = '%d.end' % linenum
# If we're highlighting 0 chars, highlight the whole line.
if self._textwidget.compare(start, '==', end):
start = '%d.0' % linenum
end = '%d.end' % linenum
self._textwidget.tag_add('error', start, end)
def _analyze(self, *e):
"""
Replace ``->`` with arrows, and colorize the entire buffer.
"""
self._replace_arrows()
numlines = int(self._textwidget.index('end').split('.')[0])
for linenum in range(1, numlines + 1): # line numbers start at 1.
self._analyze_line(linenum)
def _parse_productions(self):
"""
Parse the current contents of the textwidget buffer, to create
a list of productions.
"""
productions = []
# Get the text, normalize it, and split it into lines.
text = self._textwidget.get('1.0', 'end')
text = re.sub(self.ARROW, '->', text)
text = re.sub('\t', ' ', text)
lines = text.split('\n')
# Convert each line to a CFG production
for line in lines:
line = line.strip()
if line == '':
continue
productions += _read_cfg_production(line)
# if line.strip() == '': continue
# if not CFGEditor._PRODUCTION_RE.match(line):
# raise ValueError('Bad production string %r' % line)
#
# (lhs_str, rhs_str) = line.split('->')
# lhs = Nonterminal(lhs_str.strip())
# rhs = []
# def parse_token(match, rhs=rhs):
# token = match.group()
# if token[0] in "'\"": rhs.append(token[1:-1])
# else: rhs.append(Nonterminal(token))
# return ''
# CFGEditor._TOKEN_RE.sub(parse_token, rhs_str)
#
# productions.append(Production(lhs, *rhs))
return productions
def _destroy(self, *e):
if self._top is None:
return
self._top.destroy()
self._top = None
def _ok(self, *e):
self._apply()
self._destroy()
def _apply(self, *e):
productions = self._parse_productions()
start = Nonterminal(self._start.get())
cfg = CFG(start, productions)
if self._set_cfg_callback is not None:
self._set_cfg_callback(cfg)
def _reset(self, *e):
self._textwidget.delete('1.0', 'end')
for production in self._cfg.productions():
self._textwidget.insert('end', '%s\n' % production)
self._analyze()
if self._set_cfg_callback is not None:
self._set_cfg_callback(self._cfg)
def _cancel(self, *e):
try:
self._reset()
except:
pass
self._destroy()
def _help(self, *e):
# The default font's not very legible; try using 'fixed' instead.
try:
ShowText(
self._parent,
'Help: Chart Parser Demo',
(_CFGEditor_HELP).strip(),
width=75,
font='fixed',
)
except:
ShowText(
self._parent,
'Help: Chart Parser Demo',
(_CFGEditor_HELP).strip(),
width=75,
)
