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var_view.py
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var_view.py
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# constants and imports -------------------------------------------------------
import urwid
try:
import numpy
HAVE_NUMPY = 1
except ImportError:
HAVE_NUMPY = 0
# data ------------------------------------------------------------------------
class FrameVarInfo(object):
def __init__(self):
self.id_path_to_iinfo = {}
self.watches = []
def get_inspect_info(self, id_path, read_only):
if read_only:
return self.id_path_to_iinfo.get(
id_path, InspectInfo())
else:
return self.id_path_to_iinfo.setdefault(
id_path, InspectInfo())
class InspectInfo(object):
def __init__(self):
self.show_detail = False
self.display_type = "type"
self.highlighted = False
self.repeated_at_top = False
self.show_private_members = False
class WatchExpression(object):
def __init__(self, expression):
self.expression = expression
class WatchEvalError(object):
def __str__(self):
return "<error>"
# safe types ------------------------------------------------------------------
def get_str_safe_types():
import types
return tuple(getattr(types, s) for s in
"BuiltinFunctionType BuiltinMethodType ClassType "
"CodeType FileType FrameType FunctionType GetSetDescriptorType "
"LambdaType MemberDescriptorType MethodType ModuleType "
"SliceType TypeType TracebackType UnboundMethodType XRangeType".split()
if hasattr(types, s)) + (WatchEvalError,)
STR_SAFE_TYPES = get_str_safe_types()
# widget ----------------------------------------------------------------------
class VariableWidget(urwid.FlowWidget):
def __init__(self, prefix, var_label, value_str, id_path=None, attr_prefix=None,
watch_expr=None):
self.prefix = prefix
self.var_label = var_label
self.value_str = value_str
self.id_path = id_path
self.attr_prefix = attr_prefix or "var"
self.watch_expr = watch_expr
def selectable(self):
return True
SIZE_LIMIT = 20
def rows(self, size, focus=False):
if (self.value_str is not None
and self.var_label is not None
and len(self.prefix) + len(self.var_label) > self.SIZE_LIMIT):
return 2
else:
return 1
def render(self, size, focus=False):
maxcol = size[0]
if focus:
apfx = "focused "+self.attr_prefix+" "
else:
apfx = self.attr_prefix+" "
if self.value_str is not None:
if self.var_label is not None:
if len(self.prefix) + len(self.var_label) > self.SIZE_LIMIT:
# label too long? generate separate value line
text = [self.prefix + self.var_label,
self.prefix+" " + self.value_str]
attr = [[(apfx+"label", len(self.prefix)+len(self.var_label))],
[(apfx+"value", len(self.prefix)+2+len(self.value_str))]]
else:
text = [self.prefix + self.var_label +": " + self.value_str]
attr = [[
(apfx+"label", len(self.prefix)+len(self.var_label)+2),
(apfx+"value", len(self.value_str)),
]]
else:
text = [self.prefix + self.value_str]
attr = [[
(apfx+"label", len(self.prefix)),
(apfx+"value", len(self.value_str)),
]]
else:
text = [self.prefix + self.var_label]
attr = [[ (apfx+"label", len(self.prefix) + len(self.var_label)), ]]
from pudb.ui_tools import make_canvas
return make_canvas(text, attr, maxcol, apfx+"value")
def keypress(self, size, key):
return key
# tree walking ----------------------------------------------------------------
class ValueWalker:
def __init__(self, frame_var_info):
self.frame_var_info = frame_var_info
def walk_value(self, prefix, label, value, id_path=None, attr_prefix=None):
if id_path is None:
id_path = label
iinfo = self.frame_var_info.get_inspect_info(id_path, read_only=True)
if isinstance(value, (int, float, long, complex)):
self.add_item(prefix, label, repr(value), id_path, attr_prefix)
elif isinstance(value, (str, unicode)):
self.add_item(prefix, label, repr(value)[:200], id_path, attr_prefix)
else:
if iinfo.display_type == "type":
if HAVE_NUMPY and isinstance(value, numpy.ndarray):
displayed_value = "ndarray %s %s" % (value.dtype, value.shape)
elif isinstance(value, STR_SAFE_TYPES):
displayed_value = str(value)
else:
displayed_value = type(value).__name__
elif iinfo.display_type == "repr":
displayed_value = repr(value)
elif iinfo.display_type == "str":
displayed_value = str(value)
else:
displayed_value = "ERROR: Invalid display_type"
self.add_item(prefix, label,
displayed_value, id_path, attr_prefix)
if not iinfo.show_detail:
return
# set ---------------------------------------------------------
if isinstance(value, (set, frozenset)):
for i, entry in enumerate(value):
if i % 10 == 0 and i:
cont_id_path = "%s.cont-%d" % (id_path, i)
if not self.frame_var_info.get_inspect_info(
cont_id_path, read_only=True).show_detail:
self.add_item(prefix+" ", "...", None, cont_id_path)
break
self.walk_value(prefix+" ", None, entry,
"%s[%d]" % (id_path, i))
if not value:
self.add_item(prefix+" ", "<empty>", None)
return
# containers --------------------------------------------------
key_it = None
try:
l = len(value)
except:
pass
else:
try:
value[0]
except IndexError:
key_it = []
except:
pass
else:
key_it = xrange(l)
try:
key_it = value.iterkeys()
except:
pass
if key_it is not None:
cnt = 0
for key in key_it:
if cnt % 10 == 0 and cnt:
cont_id_path = "%s.cont-%d" % (id_path, cnt)
if not self.frame_var_info.get_inspect_info(
cont_id_path, read_only=True).show_detail:
self.add_item(
prefix+" ", "...", None, cont_id_path)
break
self.walk_value(prefix+" ", repr(key), value[key],
"%s[%r]" % (id_path, key))
cnt += 1
if not cnt:
self.add_item(prefix+" ", "<empty>", None)
return
# class types -------------------------------------------------
key_its = []
try:
key_its.append(value.__slots__)
except:
pass
try:
key_its.append(value.__dict__.iterkeys())
except:
pass
if not key_its:
try:
key_its.append(dir(value))
except:
pass
keys = [key for key_it in key_its for key in key_it]
keys.sort()
cnt_omitted = 0
for key in keys:
if key[0] == "_" and not iinfo.show_private_members:
cnt_omitted += 1
continue
try:
attr_value = getattr(value, key)
except:
attr_value = WatchEvalError()
self.walk_value(prefix+" ",
".%s" % key, attr_value,
"%s.%s" % (id_path, key))
if not keys:
if cnt_omitted:
self.add_item(prefix+" ", "<omitted private attributes>", None)
else:
self.add_item(prefix+" ", "<empty>", None)
if not key_its:
self.add_item(prefix+" ", "<?>", None)
class BasicValueWalker(ValueWalker):
def __init__(self, frame_var_info):
ValueWalker.__init__(self, frame_var_info)
self.widget_list = []
def add_item(self, prefix, var_label, value_str, id_path=None, attr_prefix=None):
iinfo = self.frame_var_info.get_inspect_info(id_path, read_only=True)
if iinfo.highlighted:
attr_prefix = "highlighted var"
self.widget_list.append(
VariableWidget(prefix, var_label, value_str, id_path, attr_prefix))
class WatchValueWalker(ValueWalker):
def __init__(self, frame_var_info, widget_list, watch_expr):
ValueWalker.__init__(self, frame_var_info)
self.widget_list = widget_list
self.watch_expr = watch_expr
def add_item(self, prefix, var_label, value_str, id_path=None, attr_prefix=None):
iinfo = self.frame_var_info.get_inspect_info(id_path, read_only=True)
if iinfo.highlighted:
attr_prefix = "highlighted var"
self.widget_list.append(
VariableWidget(prefix, var_label, value_str, id_path, attr_prefix,
watch_expr=self.watch_expr))
class TopAndMainVariableWalker(ValueWalker):
def __init__(self, frame_var_info):
ValueWalker.__init__(self, frame_var_info)
self.main_widget_list = []
self.top_widget_list = []
self.top_id_path_prefixes = []
def add_item(self, prefix, var_label, value_str, id_path=None, attr_prefix=None):
iinfo = self.frame_var_info.get_inspect_info(id_path, read_only=True)
if iinfo.highlighted:
attr_prefix = "highlighted var"
repeated_at_top = iinfo.repeated_at_top
if repeated_at_top and id_path is not None:
self.top_id_path_prefixes.append(id_path)
for tipp in self.top_id_path_prefixes:
if id_path is not None and id_path.startswith(tipp):
repeated_at_top = True
if repeated_at_top:
self.top_widget_list.append(
VariableWidget(prefix, var_label, value_str, id_path, attr_prefix))
self.main_widget_list.append(
VariableWidget(prefix, var_label, value_str, id_path, attr_prefix))
# top level -------------------------------------------------------------------
SEPARATOR = urwid.AttrMap(urwid.Text(""), "variable separator")
def make_var_view(frame_var_info, locals, globals):
vars = locals.keys()
vars.sort(key=lambda n: n.lower())
tmv_walker = TopAndMainVariableWalker(frame_var_info)
ret_walker = BasicValueWalker(frame_var_info)
watch_widget_list = []
for watch_expr in frame_var_info.watches:
try:
value = eval(watch_expr.expression, globals, locals)
except:
value = WatchEvalError()
WatchValueWalker(frame_var_info, watch_widget_list, watch_expr) \
.walk_value("", watch_expr.expression, value)
if "__return__" in vars:
ret_walker.walk_value("", "Return", locals["__return__"], attr_prefix="return")
for var in vars:
if not var[0] in "_.":
tmv_walker.walk_value("", var, locals[var])
result = tmv_walker.main_widget_list
if watch_widget_list:
result = (watch_widget_list + [SEPARATOR] + result)
if tmv_walker.top_widget_list:
result = (tmv_walker.top_widget_list + [SEPARATOR] + result)
if ret_walker.widget_list:
result = (ret_walker.widget_list + result)
return result
class FrameVarInfoKeeper(object):
def __init__(self):
self.frame_var_info = {}
def get_frame_var_info(self, read_only, ssid=None):
if ssid is None:
ssid = self.debugger.get_stack_situation_id()
if read_only:
return self.frame_var_info.get(ssid, FrameVarInfo())
else:
return self.frame_var_info.setdefault(ssid, FrameVarInfo())