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import string
import sys
import os
from Tkinter import *
import linecache
from repr import Repr
from ScrolledList import ScrolledList
class StackBrowser:
def __init__(self, root, flist, stack=None):
self.top = top = Toplevel(root)
top.protocol("WM_DELETE_WINDOW", self.close)
top.wm_title("Stack viewer")
# Create help label
self.helplabel = Label(top,
text="Click once to view variables; twice for source",
borderwidth=2, relief="groove")
self.helplabel.pack(fill="x")
#
self.sv = StackViewer(top, flist, self)
if stack is None:
stack = get_stack()
self.sv.load_stack(stack)
def close(self):
self.top.destroy()
localsframe = None
localsviewer = None
localsdict = None
globalsframe = None
globalsviewer = None
globalsdict = None
curframe = None
def show_frame(self, (frame, lineno)):
if frame is self.curframe:
return
self.curframe = None
if frame.f_globals is not self.globalsdict:
self.show_globals(frame)
self.show_locals(frame)
self.curframe = frame
def show_globals(self, frame):
title = "Global Variables"
if frame.f_globals.has_key("__name__"):
try:
name = str(frame.f_globals["__name__"]) + ""
except:
name = ""
if name:
title = title + " in module " + name
self.globalsdict = None
if self.globalsviewer:
self.globalsviewer.close()
self.globalsviewer = None
if not self.globalsframe:
self.globalsframe = Frame(self.top)
self.globalsdict = frame.f_globals
self.globalsviewer = NamespaceViewer(
self.globalsframe,
title,
self.globalsdict)
self.globalsframe.pack(fill="both", side="bottom")
def show_locals(self, frame):
self.localsdict = None
if self.localsviewer:
self.localsviewer.close()
self.localsviewer = None
if frame.f_locals is not frame.f_globals:
title = "Local Variables"
code = frame.f_code
funcname = code.co_name
if funcname not in ("?", "", None):
title = title + " in " + funcname
if not self.localsframe:
self.localsframe = Frame(self.top)
self.localsdict = frame.f_locals
self.localsviewer = NamespaceViewer(
self.localsframe,
title,
self.localsdict)
self.localsframe.pack(fill="both", side="top")
else:
if self.localsframe:
self.localsframe.forget()
class StackViewer(ScrolledList):
def __init__(self, master, flist, browser):
ScrolledList.__init__(self, master)
self.flist = flist
self.browser = browser
def load_stack(self, stack, index=None):
self.stack = stack
self.clear()
## if len(stack) > 10:
## l["height"] = 10
## self.topframe.pack(expand=1)
## else:
## l["height"] = len(stack)
## self.topframe.pack(expand=0)
for i in range(len(stack)):
frame, lineno = stack[i]
try:
modname = frame.f_globals["__name__"]
except:
modname = "?"
code = frame.f_code
filename = code.co_filename
funcname = code.co_name
sourceline = linecache.getline(filename, lineno)
sourceline = string.strip(sourceline)
if funcname in ("?", "", None):
item = "%s, line %d: %s" % (modname, lineno, sourceline)
else:
item = "%s.%s(), line %d: %s" % (modname, funcname,
lineno, sourceline)
if i == index:
item = "> " + item
self.append(item)
if index is not None:
self.select(index)
def fill_menu(self):
menu = self.menu
menu.add_command(label="Go to source line",
command=self.goto_source_line)
menu.add_command(label="Show stack frame",
command=self.show_stack_frame)
def on_select(self, index):
self.browser.show_frame(self.stack[index])
def on_double(self, index):
self.show_source(index)
def goto_source_line(self):
index = self.listbox.index("active")
self.show_source(index)
def show_stack_frame(self):
index = self.listbox.index("active")
self.browser.show_frame(self.stack[index])
def show_source(self, index):
frame, lineno = self.stack[index]
code = frame.f_code
filename = code.co_filename
if os.path.isfile(filename):
edit = self.flist.open(filename)
if edit:
edit.gotoline(lineno)
def get_stack(t=None, f=None):
if t is None:
t = sys.last_traceback
stack = []
if t and t.tb_frame is f:
t = t.tb_next
while f is not None:
stack.append((f, f.f_lineno))
if f is self.botframe:
break
f = f.f_back
stack.reverse()
while t is not None:
stack.append((t.tb_frame, t.tb_lineno))
t = t.tb_next
return stack
def getexception(type=None, value=None):
if type is None:
type = sys.last_type
value = sys.last_value
if hasattr(type, "__name__"):
type = type.__name__
s = str(type)
if value is not None:
s = s + ": " + str(value)
return s
class NamespaceViewer:
def __init__(self, master, title, dict=None):
width = 0
height = 40
if dict:
height = 20*len(dict) # XXX 20 == observed height of Entry widget
self.master = master
self.title = title
self.repr = Repr()
self.repr.maxstring = 60
self.repr.maxother = 60
self.frame = frame = Frame(master)
self.frame.pack(expand=1, fill="both")
self.label = Label(frame, text=title, borderwidth=2, relief="groove")
self.label.pack(fill="x")
self.vbar = vbar = Scrollbar(frame, name="vbar")
vbar.pack(side="right", fill="y")
self.canvas = canvas = Canvas(frame,
height=min(300, max(40, height)),
scrollregion=(0, 0, width, height))
canvas.pack(side="left", fill="both", expand=1)
vbar["command"] = canvas.yview
canvas["yscrollcommand"] = vbar.set
self.subframe = subframe = Frame(canvas)
self.sfid = canvas.create_window(0, 0, window=subframe, anchor="nw")
self.load_dict(dict)
dict = -1
def load_dict(self, dict, force=0):
if dict is self.dict and not force:
return
subframe = self.subframe
frame = self.frame
for c in subframe.children.values():
c.destroy()
self.dict = None
if not dict:
l = Label(subframe, text="None")
l.grid(row=0, column=0)
else:
names = dict.keys()
names.sort()
row = 0
for name in names:
value = dict[name]
svalue = self.repr.repr(value) # repr(value)
l = Label(subframe, text=name)
l.grid(row=row, column=0, sticky="nw")
## l = Label(subframe, text=svalue, justify="l", wraplength=300)
l = Entry(subframe, width=0, borderwidth=0)
l.insert(0, svalue)
## l["state"] = "disabled"
l.grid(row=row, column=1, sticky="nw")
row = row+1
self.dict = dict
# XXX Could we use a <Configure> callback for the following?
subframe.update_idletasks() # Alas!
width = subframe.winfo_reqwidth()
height = subframe.winfo_reqheight()
canvas = self.canvas
self.canvas["scrollregion"] = (0, 0, width, height)
if height > 300:
canvas["height"] = 300
frame.pack(expand=1)
else:
canvas["height"] = height
frame.pack(expand=0)
def close(self):
self.frame.destroy()
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