/Lib/idlelib/StackViewer.py

  1import os
  2import sys
  3import linecache
  4
  5from TreeWidget import TreeNode, TreeItem, ScrolledCanvas
  6from ObjectBrowser import ObjectTreeItem, make_objecttreeitem
  7
  8def StackBrowser(root, flist=None, tb=None, top=None):
  9    if top is None:
 10        from Tkinter import Toplevel
 11        top = Toplevel(root)
 12    sc = ScrolledCanvas(top, bg="white", highlightthickness=0)
 13    sc.frame.pack(expand=1, fill="both")
 14    item = StackTreeItem(flist, tb)
 15    node = TreeNode(sc.canvas, None, item)
 16    node.expand()
 17
 18class StackTreeItem(TreeItem):
 19
 20    def __init__(self, flist=None, tb=None):
 21        self.flist = flist
 22        self.stack = self.get_stack(tb)
 23        self.text = self.get_exception()
 24
 25    def get_stack(self, tb):
 26        if tb is None:
 27            tb = sys.last_traceback
 28        stack = []
 29        if tb and tb.tb_frame is None:
 30            tb = tb.tb_next
 31        while tb is not None:
 32            stack.append((tb.tb_frame, tb.tb_lineno))
 33            tb = tb.tb_next
 34        return stack
 35
 36    def get_exception(self):
 37        type = sys.last_type
 38        value = sys.last_value
 39        if hasattr(type, "__name__"):
 40            type = type.__name__
 41        s = str(type)
 42        if value is not None:
 43            s = s + ": " + str(value)
 44        return s
 45
 46    def GetText(self):
 47        return self.text
 48
 49    def GetSubList(self):
 50        sublist = []
 51        for info in self.stack:
 52            item = FrameTreeItem(info, self.flist)
 53            sublist.append(item)
 54        return sublist
 55
 56class FrameTreeItem(TreeItem):
 57
 58    def __init__(self, info, flist):
 59        self.info = info
 60        self.flist = flist
 61
 62    def GetText(self):
 63        frame, lineno = self.info
 64        try:
 65            modname = frame.f_globals["__name__"]
 66        except:
 67            modname = "?"
 68        code = frame.f_code
 69        filename = code.co_filename
 70        funcname = code.co_name
 71        sourceline = linecache.getline(filename, lineno)
 72        sourceline = sourceline.strip()
 73        if funcname in ("?", "", None):
 74            item = "%s, line %d: %s" % (modname, lineno, sourceline)
 75        else:
 76            item = "%s.%s(...), line %d: %s" % (modname, funcname,
 77                                             lineno, sourceline)
 78        return item
 79
 80    def GetSubList(self):
 81        frame, lineno = self.info
 82        sublist = []
 83        if frame.f_globals is not frame.f_locals:
 84            item = VariablesTreeItem("<locals>", frame.f_locals, self.flist)
 85            sublist.append(item)
 86        item = VariablesTreeItem("<globals>", frame.f_globals, self.flist)
 87        sublist.append(item)
 88        return sublist
 89
 90    def OnDoubleClick(self):
 91        if self.flist:
 92            frame, lineno = self.info
 93            filename = frame.f_code.co_filename
 94            if os.path.isfile(filename):
 95                self.flist.gotofileline(filename, lineno)
 96
 97class VariablesTreeItem(ObjectTreeItem):
 98
 99    def GetText(self):
100        return self.labeltext
101
102    def GetLabelText(self):
103        return None
104
105    def IsExpandable(self):
106        return len(self.object) > 0
107
108    def keys(self):
109        return self.object.keys()
110
111    def GetSubList(self):
112        sublist = []
113        for key in self.keys():
114            try:
115                value = self.object[key]
116            except KeyError:
117                continue
118            def setfunction(value, key=key, object=self.object):
119                object[key] = value
120            item = make_objecttreeitem(key + " =", value, setfunction)
121            sublist.append(item)
122        return sublist
123
124
125def _test():
126    try:
127        import testcode
128        reload(testcode)
129    except:
130        sys.last_type, sys.last_value, sys.last_traceback = sys.exc_info()
131    from Tkinter import Tk
132    root = Tk()
133    StackBrowser(None, top=root)
134    root.mainloop()
135
136if __name__ == "__main__":
137    _test()