1import os
2import sys
3import linecache
4import re
5import Tkinter as tk
6
7from idlelib.TreeWidget import TreeNode, TreeItem, ScrolledCanvas
8from idlelib.ObjectBrowser import ObjectTreeItem, make_objecttreeitem
9from idlelib.PyShell import PyShellFileList
10
11def StackBrowser(root, flist=None, tb=None, top=None):
12    if top is None:
13        top = tk.Toplevel(root)
14    sc = ScrolledCanvas(top, bg="white", highlightthickness=0)
15    sc.frame.pack(expand=1, fill="both")
16    item = StackTreeItem(flist, tb)
17    node = TreeNode(sc.canvas, None, item)
18    node.expand()
19
20class StackTreeItem(TreeItem):
21
22    def __init__(self, flist=None, tb=None):
23        self.flist = flist
24        self.stack = self.get_stack(tb)
25        self.text = self.get_exception()
26
27    def get_stack(self, tb):
28        if tb is None:
29            tb = sys.last_traceback
30        stack = []
31        if tb and tb.tb_frame is None:
32            tb = tb.tb_next
33        while tb is not None:
34            stack.append((tb.tb_frame, tb.tb_lineno))
35            tb = tb.tb_next
36        return stack
37
38    def get_exception(self):
39        type = sys.last_type
40        value = sys.last_value
41        if hasattr(type, "__name__"):
42            type = type.__name__
43        s = str(type)
44        if value is not None:
45            s = s + ": " + str(value)
46        return s
47
48    def GetText(self):
49        return self.text
50
51    def GetSubList(self):
52        sublist = []
53        for info in self.stack:
54            item = FrameTreeItem(info, self.flist)
55            sublist.append(item)
56        return sublist
57
58class FrameTreeItem(TreeItem):
59
60    def __init__(self, info, flist):
61        self.info = info
62        self.flist = flist
63
64    def GetText(self):
65        frame, lineno = self.info
66        try:
67            modname = frame.f_globals["__name__"]
68        except:
69            modname = "?"
70        code = frame.f_code
71        filename = code.co_filename
72        funcname = code.co_name
73        sourceline = linecache.getline(filename, lineno)
74        sourceline = sourceline.strip()
75        if funcname in ("?", "", None):
76            item = "%s, line %d: %s" % (modname, lineno, sourceline)
77        else:
78            item = "%s.%s(...), line %d: %s" % (modname, funcname,
79                                             lineno, sourceline)
80        return item
81
82    def GetSubList(self):
83        frame, lineno = self.info
84        sublist = []
85        if frame.f_globals is not frame.f_locals:
86            item = VariablesTreeItem("<locals>", frame.f_locals, self.flist)
87            sublist.append(item)
88        item = VariablesTreeItem("<globals>", frame.f_globals, self.flist)
89        sublist.append(item)
90        return sublist
91
92    def OnDoubleClick(self):
93        if self.flist:
94            frame, lineno = self.info
95            filename = frame.f_code.co_filename
96            if os.path.isfile(filename):
97                self.flist.gotofileline(filename, lineno)
98
99class VariablesTreeItem(ObjectTreeItem):
100
101    def GetText(self):
102        return self.labeltext
103
104    def GetLabelText(self):
105        return None
106
107    def IsExpandable(self):
108        return len(self.object) > 0
109
110    def GetSubList(self):
111        sublist = []
112        for key in self.object.keys():
113            try:
114                value = self.object[key]
115            except KeyError:
116                continue
117            def setfunction(value, key=key, object=self.object):
118                object[key] = value
119            item = make_objecttreeitem(key + " =", value, setfunction)
120            sublist.append(item)
121        return sublist
122
123    def keys(self):  # unused, left for possible 3rd party use
124        return self.object.keys()
125
126def _stack_viewer(parent):  # htest #
127    root = tk.Tk()
128    root.title("Test StackViewer")
129    width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
130    root.geometry("+%d+%d"%(x, y + 150))
131    flist = PyShellFileList(root)
132    try: # to obtain a traceback object
133        intentional_name_error
134    except NameError:
135        exc_type, exc_value, exc_tb = sys.exc_info()
136
137    # inject stack trace to sys
138    sys.last_type = exc_type
139    sys.last_value = exc_value
140    sys.last_traceback = exc_tb
141
142    StackBrowser(root, flist=flist, top=root, tb=exc_tb)
143
144    # restore sys to original state
145    del sys.last_type
146    del sys.last_value
147    del sys.last_traceback
148
149if __name__ == '__main__':
150    from idlelib.idle_test.htest import run
151    run(_stack_viewer)
152