summaryrefslogtreecommitdiff
path: root/Lib/idlelib/stackviewer.py
blob: 400fa632a098cf2da9a9cc92971e6f05d20e3994 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
import linecache
import os
import sys

import tkinter as tk

from idlelib.debugobj import ObjectTreeItem, make_objecttreeitem
from idlelib.tree import TreeNode, TreeItem, ScrolledCanvas

def StackBrowser(root, flist=None, tb=None, top=None):
    if top is None:
        top = tk.Toplevel(root)
    sc = ScrolledCanvas(top, bg="white", highlightthickness=0)
    sc.frame.pack(expand=1, fill="both")
    item = StackTreeItem(flist, tb)
    node = TreeNode(sc.canvas, None, item)
    node.expand()


class StackTreeItem(TreeItem):

    def __init__(self, flist=None, tb=None):
        self.flist = flist
        self.stack = self.get_stack(tb)
        self.text = self.get_exception()

    def get_stack(self, tb):
        if tb is None:
            tb = sys.last_traceback
        stack = []
        if tb and tb.tb_frame is None:
            tb = tb.tb_next
        while tb is not None:
            stack.append((tb.tb_frame, tb.tb_lineno))
            tb = tb.tb_next
        return stack

    def get_exception(self):
        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

    def GetText(self):
        return self.text

    def GetSubList(self):
        sublist = []
        for info in self.stack:
            item = FrameTreeItem(info, self.flist)
            sublist.append(item)
        return sublist


class FrameTreeItem(TreeItem):

    def __init__(self, info, flist):
        self.info = info
        self.flist = flist

    def GetText(self):
        frame, lineno = self.info
        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 = sourceline.strip()
        if funcname in ("?", "", None):
            item = "%s, line %d: %s" % (modname, lineno, sourceline)
        else:
            item = "%s.%s(...), line %d: %s" % (modname, funcname,
                                             lineno, sourceline)
        return item

    def GetSubList(self):
        frame, lineno = self.info
        sublist = []
        if frame.f_globals is not frame.f_locals:
            item = VariablesTreeItem("<locals>", frame.f_locals, self.flist)
            sublist.append(item)
        item = VariablesTreeItem("<globals>", frame.f_globals, self.flist)
        sublist.append(item)
        return sublist

    def OnDoubleClick(self):
        if self.flist:
            frame, lineno = self.info
            filename = frame.f_code.co_filename
            if os.path.isfile(filename):
                self.flist.gotofileline(filename, lineno)


class VariablesTreeItem(ObjectTreeItem):

    def GetText(self):
        return self.labeltext

    def GetLabelText(self):
        return None

    def IsExpandable(self):
        return len(self.object) > 0

    def GetSubList(self):
        sublist = []
        for key in self.object.keys():
            try:
                value = self.object[key]
            except KeyError:
                continue
            def setfunction(value, key=key, object=self.object):
                object[key] = value
            item = make_objecttreeitem(key + " =", value, setfunction)
            sublist.append(item)
        return sublist


def _stack_viewer(parent):  # htest #
    from idlelib.pyshell import PyShellFileList
    top = tk.Toplevel(parent)
    top.title("Test StackViewer")
    x, y = map(int, parent.geometry().split('+')[1:])
    top.geometry("+%d+%d" % (x + 50, y + 175))
    flist = PyShellFileList(top)
    try: # to obtain a traceback object
        intentional_name_error
    except NameError:
        exc_type, exc_value, exc_tb = sys.exc_info()

    # inject stack trace to sys
    sys.last_type = exc_type
    sys.last_value = exc_value
    sys.last_traceback = exc_tb

    StackBrowser(top, flist=flist, top=top, tb=exc_tb)

    # restore sys to original state
    del sys.last_type
    del sys.last_value
    del sys.last_traceback

if __name__ == '__main__':
    from idlelib.idle_test.htest import run
    run(_stack_viewer)