Initial revision

This commit is contained in:
Guido van Rossum 1991-04-07 13:41:50 +00:00
parent fa54064967
commit 2d844d1ddc
10 changed files with 861 additions and 0 deletions

63
Lib/lib-stdwin/DirList.py Normal file
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# DirList -- Directory Listing widget
try:
import posix, path
os = posix
except NameError:
import mac, macpath
os = mac
path = macpath
import stdwin, rect
from stdwinevents import *
from Buttons import PushButton
from WindowParent import WindowParent
from HVSplit import HSplit, VSplit
class DirList() = VSplit():
#
def create(self, (parent, dirname)):
self = VSplit.create(self, parent)
names = os.listdir(dirname)
for name in names:
if path.isdir(path.cat(dirname, name)):
fullname = path.cat(dirname, name)
btn = SubdirButton().definetext(self, fullname)
elif name[-3:] = '.py':
btn = ModuleButton().definetext(self, name)
else:
btn = FileButton().definetext(self, name)
return self
#
class DirListWindow() = WindowParent():
#
def create(self, dirname):
self = WindowParent.create(self, (dirname, (0, 0)))
child = DirList().create(self, dirname)
self.realize()
return self
#
class SubdirButton() = PushButton():
#
def drawpict(self, d):
PushButton.drawpict(self, d)
d.box(rect.inset(self.bounds, (3, 1)))
#
def up_trigger(self):
window = DirListWindow().create(self.text)
#
class FileButton() = PushButton():
#
def up_trigger(self):
stdwin.fleep()
#
class ModuleButton() = FileButton():
#
def drawpict(self, d):
PushButton.drawpict(self, d)
d.box(rect.inset(self.bounds, (1, 3)))
#

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# A FormSplit lets you place its children exactly where you want them
# (including silly places!).
# It does no explicit geometry management except moving its children
# when it is moved.
# The interface to place children is as follows.
# Before you add a child, you may specify its (left, top) position
# relative to the FormSplit. If you don't specify a position for
# a child, it goes right below the previous child; the first child
# goes to (0, 0) by default.
# NB: This places data attributes named form_* on its children.
# XXX Yes, I know, there should be options to do all sorts of relative
# placement, but for now this will do.
from Split import Split
class FormSplit() = Split():
#
def create(self, parent):
self.next_left = self.next_top = 0
self.last_child = None
return Split.create(self, parent)
#
def minsize(self, m):
max_width, max_height = 0, 0
for c in self.children:
c.form_width, c.form_height = c.minsize(m)
max_width = max(max_width, c.form_width + c.form_left)
max_height = max(max_height, c.form_height + c.form_top)
return max_width, max_height
#
def getbounds(self):
return self.bounds
#
def setbounds(self, bounds):
self.bounds = bounds
fleft, ftop = bounds[0]
for c in self.children:
left, top = c.form_left + fleft, c.form_top + ftop
right, bottom = left + c.form_width, top + c.form_height
c.setbounds((left, top), (right, bottom))
#
def placenext(self, (left, top)):
self.next_left = left
self.next_top = top
self.last_child = None
#
def addchild(self, child):
if self.last_child:
width, height = \
self.last_child.minsize(self.beginmeasuring())
self.next_top = self.next_top + height
child.form_left = self.next_left
child.form_top = self.next_top
Split.addchild(self, child)
self.last_child = child
#

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# Text editing widget
from stdwinevents import *
class TextEdit():
#
def create(self, (parent, (cols, rows))):
parent.addchild(self)
self.parent = parent
self.cols = cols
self.rows = rows
self.text = ''
# Creation of the editor is done in realize()
self.editor = 0
return self
#
# Downcalls from parent to child
#
def destroy(self):
del self.parent
del self.editor
del self.window
#
def minsize(self, m):
return self.cols*m.textwidth('n'), self.rows*m.lineheight()
def setbounds(self, bounds):
self.bounds = bounds
if self.editor:
self.editor.move(bounds)
def getbounds(self, bounds):
if self.editor:
return self.editor.getrect()
else:
return self.bounds
def realize(self):
self.window = self.parent.getwindow()
self.editor = self.window.textcreate(self.bounds)
self.editor.replace(self.text)
self.parent.need_mouse(self)
self.parent.need_keybd(self)
self.parent.need_altdraw(self)
def draw(self, (d, area)):
pass
def altdraw(self, area):
self.editor.draw(area)
#
# Event downcalls
#
def mouse_down(self, detail):
x = self.editor.event(WE_MOUSE_DOWN, self.window, detail)
def mouse_move(self, detail):
x = self.editor.event(WE_MOUSE_MOVE, self.window, detail)
def mouse_up(self, detail):
x = self.editor.event(WE_MOUSE_UP, self.window, detail)
#
def keybd(self, (type, detail)):
x = self.editor.event(type, self.window, detail)
#

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# Combine a real-time scheduling queue and stdwin event handling.
# Uses the millisecond timer.
import stdwin
from stdwinevents import WE_TIMER
import WindowParent
import sched
import time
# Delay function called by the scheduler when it has nothing to do.
# Return immediately when something is done, or when the delay is up.
#
def delayfunc(msecs):
#
# Check for immediate stdwin event
#
event = stdwin.pollevent()
if event:
WindowParent.Dispatch(event)
return
#
# Use millisleep for very short delays or if there are no windows
#
if msecs < 100 or WindowParent.CountWindows() = 0:
time.millisleep(msecs)
return
#
# Post a timer event on an arbitrary window and wait for it
#
window = WindowParent.AnyWindow()
window.settimer(msecs/100)
event = stdwin.getevent()
window.settimer(0)
if event[0] <> WE_TIMER:
WindowParent.Dispatch(event)
q = sched.scheduler().init(time.millitimer, delayfunc)
# Export functions enter, enterabs and cancel just like a scheduler
#
enter = q.enter
enterabs = q.enterabs
cancel = q.cancel
# Emptiness check must check both queues
#
def empty():
return q.empty() and WindowParent.CountWindows() = 0
# Run until there is nothing left to do
#
def run():
while not empty():
if q.empty():
WindowParent.Dispatch(stdwin.getevent())
else:
q.run()

297
Lib/persist.py Executable file
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# persist.py
#
# Implement limited persistence.
#
# Simple interface:
# persist.save() save __main__ module on file (overwrite)
# persist.load() load __main__ module from file (merge)
#
# These use the filename persist.defaultfile, initialized to 'wsrestore.py'.
#
# A raw interface also exists:
# persist.writedict(dict, fp) save dictionary to open file
# persist.readdict(dict, fp) read (merge) dictionary from open file
#
# Internally, the function dump() and a whole bunch of support of functions
# traverse a graph of objects and print them in a restorable form
# (which happens to be a Python module).
#
# XXX Limitations:
# - Volatile objects are dumped as strings:
# - open files, windows etc.
# - Other 'obscure' objects are dumped as strings:
# - classes, instances and methods
# - compiled regular expressions
# - anything else reasonably obscure (e.g., capabilities)
# - type objects for obscure objects
# - It's slow when there are many of lists or dictionaries
# (This could be fixed if there were a quick way to compute a hash
# function of any object, even if recursive)
defaultfile = 'wsrestore.py'
def save():
import __main__
import posix
# XXX On SYSV, if len(defaultfile) >= 14, this is wrong!
backup = defaultfile + '~'
try:
posix.unlink(backup)
except posix.error:
pass
try:
posix.rename(defaultfile, backup)
except posix.error:
pass
fp = open(defaultfile, 'w')
writedict(__main__.__dict__, fp)
fp.close()
def load():
import __main__
fp = open(defaultfile, 'r')
readdict(__main__.__dict__, fp)
def writedict(dict, fp):
import sys
savestdout = sys.stdout
try:
sys.stdout = fp
dump(dict) # Writes to sys.stdout
finally:
sys.stdout = savestdout
def readdict(dict, fp):
contents = fp.read() # Or: util.readopenfile(fp)
globals = {}
exec(contents, globals)
top = globals['top']
for key in top.keys():
if dict.has_key(key):
print 'warning:', key, 'not overwritten'
else:
dict[key] = top[key]
# Function dump(x) prints (on sys.stdout!) a sequence of Python statements
# that, when executed in an empty environment, will reconstruct the
# contents of an arbitrary dictionary.
import sys
# Name used for objects dict on output.
#
FUNNYNAME = FN = 'A'
# Top-level function. Call with the object you want to dump.
#
def dump(x):
types = {}
stack = [] # Used by test for recursive objects
print FN, '= {}'
topuid = dumpobject(x, types, stack)
print 'top =', FN, '[', `topuid`, ']'
# Generic function to dump any object.
#
dumpswitch = {}
#
def dumpobject(x, types, stack):
typerepr = `type(x)`
if not types.has_key(typerepr):
types[typerepr] = {}
typedict = types[typerepr]
if dumpswitch.has_key(typerepr):
return dumpswitch[typerepr](x, typedict, types, stack)
else:
return dumpbadvalue(x, typedict, types, stack)
# Generic function to dump unknown values.
# This assumes that the Python interpreter prints such values as
# <foo object at xxxxxxxx>.
# The object will be read back as a string: '<foo object at xxxxxxxx>'.
# In some cases it may be possible to fix the dump manually;
# to ease the editing, these cases are labeled with an XXX comment.
#
def dumpbadvalue(x, typedict, types, stack):
xrepr = `x`
if typedict.has_key(xrepr):
return typedict[xrepr]
uid = genuid()
typedict[xrepr] = uid
print FN, '[', `uid`, '] =', `xrepr`, '# XXX'
return uid
# Generic function to dump pure, simple values, except strings
#
def dumpvalue(x, typedict, types, stack):
xrepr = `x`
if typedict.has_key(xrepr):
return typedict[xrepr]
uid = genuid()
typedict[xrepr] = uid
print FN, '[', `uid`, '] =', `x`
return uid
# Functions to dump string objects
#
def dumpstring(x, typedict, types, stack):
# XXX This can break if strings have embedded '\0' bytes
# XXX because of a bug in the dictionary module
if typedict.has_key(x):
return typedict[x]
uid = genuid()
typedict[x] = uid
print FN, '[', `uid`, '] =', `x`
return uid
# Function to dump type objects
#
typeswitch = {}
class some_class():
def method(self): pass
some_instance = some_class()
#
def dumptype(x, typedict, types, stack):
xrepr = `x`
if typedict.has_key(xrepr):
return typedict[xrepr]
uid = genuid()
typedict[xrepr] = uid
if typeswitch.has_key(xrepr):
print FN, '[', `uid`, '] =', typeswitch[xrepr]
elif x = type(sys):
print 'import sys'
print FN, '[', `uid`, '] = type(sys)'
elif x = type(sys.stderr):
print 'import sys'
print FN, '[', `uid`, '] = type(sys.stderr)'
elif x = type(dumptype):
print 'def some_function(): pass'
print FN, '[', `uid`, '] = type(some_function)'
elif x = type(some_class):
print 'class some_class(): pass'
print FN, '[', `uid`, '] = type(some_class)'
elif x = type(some_instance):
print 'class another_class(): pass'
print 'some_instance = another_class()'
print FN, '[', `uid`, '] = type(some_instance)'
elif x = type(some_instance.method):
print 'class yet_another_class():'
print ' def method(): pass'
print 'another_instance = yet_another_class()'
print FN, '[', `uid`, '] = type(another_instance.method)'
else:
# Unknown type
print FN, '[', `uid`, '] =', `xrepr`, '# XXX'
return uid
# Initialize the typeswitch
#
for x in None, 0, 0.0, '', (), [], {}:
typeswitch[`type(x)`] = 'type(' + `x` + ')'
for s in 'type(0)', 'abs', '[].append':
typeswitch[`type(eval(s))`] = 'type(' + s + ')'
# Dump a tuple object
#
def dumptuple(x, typedict, types, stack):
item_uids = []
xrepr = ''
for item in x:
item_uid = dumpobject(item, types, stack)
item_uids.append(item_uid)
xrepr = xrepr + ' ' + item_uid
del stack[-1:]
if typedict.has_key(xrepr):
return typedict[xrepr]
uid = genuid()
typedict[xrepr] = uid
print FN, '[', `uid`, '] = (',
for item_uid in item_uids:
print FN, '[', `item_uid`, '],',
print ')'
return uid
# Dump a list object
#
def dumplist(x, typedict, types, stack):
# Check for recursion
for x1, uid1 in stack:
if x is x1: return uid1
# Check for occurrence elsewhere in the typedict
for uid1 in typedict.keys():
if x is typedict[uid1]: return uid1
# This uses typedict differently!
uid = genuid()
typedict[uid] = x
print FN, '[', `uid`, '] = []'
stack.append(x, uid)
item_uids = []
for item in x:
item_uid = dumpobject(item, types, stack)
item_uids.append(item_uid)
del stack[-1:]
for item_uid in item_uids:
print FN, '[', `uid`, '].append(', FN, '[', `item_uid`, '])'
return uid
# Dump a dictionary object
#
def dumpdict(x, typedict, types, stack):
# Check for recursion
for x1, uid1 in stack:
if x is x1: return uid1
# Check for occurrence elsewhere in the typedict
for uid1 in typedict.keys():
if x is typedict[uid1]: return uid1
# This uses typedict differently!
uid = genuid()
typedict[uid] = x
print FN, '[', `uid`, '] = {}'
stack.append(x, uid)
item_uids = []
for key in x.keys():
val_uid = dumpobject(x[key], types, stack)
item_uids.append(key, val_uid)
del stack[-1:]
for key, val_uid in item_uids:
print FN, '[', `uid`, '][', `key`, '] =',
print FN, '[', `val_uid`, ']'
return uid
# Dump a module object
#
def dumpmodule(x, typedict, types, stack):
xrepr = `x`
if typedict.has_key(xrepr):
return typedict[xrepr]
from string import split
# `x` has the form <module 'foo'>
name = xrepr[9:-2]
uid = genuid()
typedict[xrepr] = uid
print 'import', name
print FN, '[', `uid`, '] =', name
return uid
# Initialize dumpswitch, a table of functions to dump various objects,
# indexed by `type(x)`.
#
for x in None, 0, 0.0:
dumpswitch[`type(x)`] = dumpvalue
for x, f in ('', dumpstring), (type(0), dumptype), ((), dumptuple), \
([], dumplist), ({}, dumpdict), (sys, dumpmodule):
dumpswitch[`type(x)`] = f
# Generate the next unique id; a string consisting of digits.
# The seed is stored as seed[0].
#
seed = [0]
#
def genuid():
x = seed[0]
seed[0] = seed[0] + 1
return `x`

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Lib/sched.py Normal file
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# Module sched -- a generally useful event scheduler class
# Each instance of this class manages its own queue.
# No multi-threading is implied; you are supposed to hack that
# yourself, or use a single instance per application.
#
# Each instance is parametrized with two functions, one that is
# supposed to return the current time, one that is supposed to
# implement a delay. You can implement fine- or course-grained
# real-time scheduling by substituting time and sleep or millitimer
# and millisleep from the built-in module time, or you can implement
# simulated time by writing your own functions. This can also be
# used to integrate scheduling with STDWIN events; the delay function
# is allowed to modify the queue. Time can be expressed
# as integers or floating point numbers, as long as it is consistent.
# Events are specified by tuples (time, priority, action, argument).
# As in UNIX, lower priority numbers mean higher priority; in this
# way the queue can be maintained fully sorted. Execution of the
# event means calling the action function, passing it the argument.
# Remember that in Python, multiple function arguments can be packed
# in a tuple. The action function may be an instance method so it
# has another way to reference private data (besides global variables).
# Parameterless functions or methods cannot be used, however.
class scheduler():
#
# Initialize a new instance, passing the time and delay functions
#
def init(self, (timefunc, delayfunc)):
self.queue = []
self.timefunc = timefunc
self.delayfunc = delayfunc
return self
#
# Enter a new event in the queue at an absolute time.
# Returns an ID for the event which can be used
# to remove it, if necessary.
#
def enterabs(self, event):
time, priority, action, argument = event
q = self.queue
# XXX Could use bisection or linear interpolation?
for i in range(len(q)):
qtime, qpri, qact, qarg = q[i]
if time < qtime: break
if time = qtime and priority < qpri: break
else:
i = len(q)
q.insert(i, event)
return event # The ID
#
# A variant that specifies the time as a relative time.
# This is actually the more commonly used interface.
#
def enter(self, (delay, priority, action, argument)):
time = self.timefunc() + delay
return self.enterabs(time, priority, action, argument)
#
# Remove an event from the queue.
# This must be presented the ID as returned by enter().
# If the event is not in the queue, this raises RuntimeError.
#
def cancel(self, event):
self.queue.remove(event)
#
# Check whether the queue is empty.
#
def empty(self):
return len(self.queue) = 0
#
# Run: execute events until the queue is empty.
#
# When there is a positive delay until the first event, the
# delay function is called and the event is left in the queue;
# otherwise, the event is removed from the queue and executed
# (its action function is called, passing it the argument).
# If the delay function returns prematurely, it is simply
# restarted.
#
# It is legal for both the delay function and the action
# function to to modify the queue or to raise an exception;
# exceptions are not caught but the scheduler's state
# remains well-defined so run() may be called again.
#
def run(self):
q = self.queue
while q:
time, priority, action, argument = q[0]
now = self.timefunc()
if now < time:
self.delayfunc(time - now)
else:
del q[0]
void = action(argument)
#

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Lib/stdwin/DirList.py Executable file
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# DirList -- Directory Listing widget
try:
import posix, path
os = posix
except NameError:
import mac, macpath
os = mac
path = macpath
import stdwin, rect
from stdwinevents import *
from Buttons import PushButton
from WindowParent import WindowParent
from HVSplit import HSplit, VSplit
class DirList() = VSplit():
#
def create(self, (parent, dirname)):
self = VSplit.create(self, parent)
names = os.listdir(dirname)
for name in names:
if path.isdir(path.cat(dirname, name)):
fullname = path.cat(dirname, name)
btn = SubdirButton().definetext(self, fullname)
elif name[-3:] = '.py':
btn = ModuleButton().definetext(self, name)
else:
btn = FileButton().definetext(self, name)
return self
#
class DirListWindow() = WindowParent():
#
def create(self, dirname):
self = WindowParent.create(self, (dirname, (0, 0)))
child = DirList().create(self, dirname)
self.realize()
return self
#
class SubdirButton() = PushButton():
#
def drawpict(self, d):
PushButton.drawpict(self, d)
d.box(rect.inset(self.bounds, (3, 1)))
#
def up_trigger(self):
window = DirListWindow().create(self.text)
#
class FileButton() = PushButton():
#
def up_trigger(self):
stdwin.fleep()
#
class ModuleButton() = FileButton():
#
def drawpict(self, d):
PushButton.drawpict(self, d)
d.box(rect.inset(self.bounds, (1, 3)))
#

56
Lib/stdwin/FormSplit.py Executable file
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# A FormSplit lets you place its children exactly where you want them
# (including silly places!).
# It does no explicit geometry management except moving its children
# when it is moved.
# The interface to place children is as follows.
# Before you add a child, you may specify its (left, top) position
# relative to the FormSplit. If you don't specify a position for
# a child, it goes right below the previous child; the first child
# goes to (0, 0) by default.
# NB: This places data attributes named form_* on its children.
# XXX Yes, I know, there should be options to do all sorts of relative
# placement, but for now this will do.
from Split import Split
class FormSplit() = Split():
#
def create(self, parent):
self.next_left = self.next_top = 0
self.last_child = None
return Split.create(self, parent)
#
def minsize(self, m):
max_width, max_height = 0, 0
for c in self.children:
c.form_width, c.form_height = c.minsize(m)
max_width = max(max_width, c.form_width + c.form_left)
max_height = max(max_height, c.form_height + c.form_top)
return max_width, max_height
#
def getbounds(self):
return self.bounds
#
def setbounds(self, bounds):
self.bounds = bounds
fleft, ftop = bounds[0]
for c in self.children:
left, top = c.form_left + fleft, c.form_top + ftop
right, bottom = left + c.form_width, top + c.form_height
c.setbounds((left, top), (right, bottom))
#
def placenext(self, (left, top)):
self.next_left = left
self.next_top = top
self.last_child = None
#
def addchild(self, child):
if self.last_child:
width, height = \
self.last_child.minsize(self.beginmeasuring())
self.next_top = self.next_top + height
child.form_left = self.next_left
child.form_top = self.next_top
Split.addchild(self, child)
self.last_child = child
#

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Lib/stdwin/TextEdit.py Executable file
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# Text editing widget
from stdwinevents import *
class TextEdit():
#
def create(self, (parent, (cols, rows))):
parent.addchild(self)
self.parent = parent
self.cols = cols
self.rows = rows
self.text = ''
# Creation of the editor is done in realize()
self.editor = 0
return self
#
# Downcalls from parent to child
#
def destroy(self):
del self.parent
del self.editor
del self.window
#
def minsize(self, m):
return self.cols*m.textwidth('n'), self.rows*m.lineheight()
def setbounds(self, bounds):
self.bounds = bounds
if self.editor:
self.editor.move(bounds)
def getbounds(self, bounds):
if self.editor:
return self.editor.getrect()
else:
return self.bounds
def realize(self):
self.window = self.parent.getwindow()
self.editor = self.window.textcreate(self.bounds)
self.editor.replace(self.text)
self.parent.need_mouse(self)
self.parent.need_keybd(self)
self.parent.need_altdraw(self)
def draw(self, (d, area)):
pass
def altdraw(self, area):
self.editor.draw(area)
#
# Event downcalls
#
def mouse_down(self, detail):
x = self.editor.event(WE_MOUSE_DOWN, self.window, detail)
def mouse_move(self, detail):
x = self.editor.event(WE_MOUSE_MOVE, self.window, detail)
def mouse_up(self, detail):
x = self.editor.event(WE_MOUSE_UP, self.window, detail)
#
def keybd(self, (type, detail)):
x = self.editor.event(type, self.window, detail)
#

57
Lib/stdwin/WindowSched.py Executable file
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# Combine a real-time scheduling queue and stdwin event handling.
# Uses the millisecond timer.
import stdwin
from stdwinevents import WE_TIMER
import WindowParent
import sched
import time
# Delay function called by the scheduler when it has nothing to do.
# Return immediately when something is done, or when the delay is up.
#
def delayfunc(msecs):
#
# Check for immediate stdwin event
#
event = stdwin.pollevent()
if event:
WindowParent.Dispatch(event)
return
#
# Use millisleep for very short delays or if there are no windows
#
if msecs < 100 or WindowParent.CountWindows() = 0:
time.millisleep(msecs)
return
#
# Post a timer event on an arbitrary window and wait for it
#
window = WindowParent.AnyWindow()
window.settimer(msecs/100)
event = stdwin.getevent()
window.settimer(0)
if event[0] <> WE_TIMER:
WindowParent.Dispatch(event)
q = sched.scheduler().init(time.millitimer, delayfunc)
# Export functions enter, enterabs and cancel just like a scheduler
#
enter = q.enter
enterabs = q.enterabs
cancel = q.cancel
# Emptiness check must check both queues
#
def empty():
return q.empty() and WindowParent.CountWindows() = 0
# Run until there is nothing left to do
#
def run():
while not empty():
if q.empty():
WindowParent.Dispatch(stdwin.getevent())
else:
q.run()