Adding the old stack viewer implementation back, for the debugger.

gvanrossum · gvanrossum · commit 2bb8e72046b9 · 2000-02-15T18:04:09.000Z
diff --git a/Tools/idle/OldStackViewer.py b/Tools/idle/OldStackViewer.py
@@ -0,0 +1,276 @@
+import string
+import sys
+import os
+from Tkinter import *
+import linecache
+from repr import Repr
+from WindowList import ListedToplevel
+
+from ScrolledList import ScrolledList
+
+
+class StackBrowser:
+
+    def __init__(self, root, flist, stack=None):
+        self.top = top = ListedToplevel(root)
+        top.protocol("WM_DELETE_WINDOW", self.close)
+        top.bind("<Key-Escape>", self.close)
+        top.wm_title("Stack viewer")
+        top.wm_iconname("Stack")
+        # 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, event=None):
+        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, width=80)
+        self.flist = flist
+        self.browser = browser
+        self.stack = []
+
+    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 popup_event(self, event):
+        if self.stack:
+            return ScrolledList.popup_event(self, event)
+
+    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):
+        if 0 <= index < len(self.stack):
+            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")
+        if 0 <= index < len(self.stack):
+            self.browser.show_frame(self.stack[index])
+
+    def show_source(self, index):
+        if not (0 <= index < len(self.stack)):
+            return
+        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()
