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""" ILeo - Leo plugin for IPython
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"""
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import IPython.ipapi
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import IPython.genutils
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import IPython.generics
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from IPython.hooks import CommandChainDispatcher
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import re
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import UserDict
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from IPython.ipapi import TryNext
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ip = IPython.ipapi.get()
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leo = ip.user_ns['leox']
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c,g = leo.c, leo.g
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# will probably be overwritten by user, but handy for experimentation early on
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ip.user_ns['c'] = c
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ip.user_ns['g'] = g
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from IPython.external.simplegeneric import generic
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import pprint
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def es(s):
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g.es(s, tabName = 'IPython')
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pass
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@generic
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def format_for_leo(obj):
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""" Convert obj to string representiation (for editing in Leo)"""
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return pprint.pformat(obj)
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@format_for_leo.when_type(list)
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def format_list(obj):
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return "\n".join(str(s) for s in obj)
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attribute_re = re.compile('^[a-zA-Z_][a-zA-Z0-9_]*$')
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def valid_attribute(s):
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return attribute_re.match(s)
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def all_cells():
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d = {}
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for p in c.allNodes_iter():
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h = p.headString()
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if h.startswith('@a '):
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d[h.lstrip('@a ').strip()] = p.parent().copy()
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elif not valid_attribute(h):
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continue
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d[h] = p.copy()
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return d
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def eval_node(n):
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body = n.b
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if not body.startswith('@cl'):
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# plain python repr node, just eval it
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return ip.ev(n.b)
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# @cl nodes deserve special treatment - first eval the first line (minus cl), then use it to call the rest of body
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first, rest = body.split('\n',1)
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tup = first.split(None, 1)
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# @cl alone SPECIAL USE-> dump var to user_ns
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if len(tup) == 1:
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val = ip.ev(rest)
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ip.user_ns[n.h] = val
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es("%s = %s" % (n.h, repr(val)[:20] ))
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return val
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cl, hd = tup
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xformer = ip.ev(hd.strip())
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es('Transform w/ %s' % repr(xformer))
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return xformer(rest, n)
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class LeoNode(object, UserDict.DictMixin):
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""" Node in Leo outline
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Most important attributes (getters/setters available:
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.v - evaluate node, can also be alligned
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.b, .h - body string, headline string
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.l - value as string list
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Also supports iteration,
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setitem / getitem (indexing):
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wb.foo['key'] = 12
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assert wb.foo['key'].v == 12
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Note the asymmetry on setitem and getitem! Also other
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dict methods are available.
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.ipush() - run push-to-ipython
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"""
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def __init__(self,p):
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self.p = p.copy()
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def __str__(self):
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return "<LeoNode %s>" % str(self.p)
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__repr__ = __str__
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def __get_h(self): return self.p.headString()
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def __set_h(self,val):
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print "set head",val
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c.beginUpdate()
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try:
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c.setHeadString(self.p,val)
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finally:
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c.endUpdate()
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h = property( __get_h, __set_h, doc = "Node headline string")
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def __get_b(self): return self.p.bodyString()
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def __set_b(self,val):
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print "set body",val
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c.beginUpdate()
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try:
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c.setBodyString(self.p, val)
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finally:
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c.endUpdate()
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b = property(__get_b, __set_b, doc = "Nody body string")
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def __set_val(self, val):
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self.b = format_for_leo(val)
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v = property(lambda self: eval_node(self), __set_val, doc = "Node evaluated value")
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def __set_l(self,val):
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self.b = '\n'.join(val )
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l = property(lambda self : IPython.genutils.SList(self.b.splitlines()),
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__set_l, doc = "Node value as string list")
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def __iter__(self):
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""" Iterate through nodes direct children """
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return (LeoNode(p) for p in self.p.children_iter())
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def __children(self):
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d = {}
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for child in self:
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head = child.h
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tup = head.split(None,1)
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if len(tup) > 1 and tup[0] == '@k':
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d[tup[1]] = child
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continue
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if not valid_attribute(head):
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d[head] = child
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continue
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return d
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def keys(self):
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d = self.__children()
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return d.keys()
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def __getitem__(self, key):
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""" wb.foo['Some stuff'] Return a child node with headline 'Some stuff'
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If key is a valid python name (e.g. 'foo'), look for headline '@k foo' as well
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"""
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key = str(key)
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d = self.__children()
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return d[key]
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def __setitem__(self, key, val):
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""" You can do wb.foo['My Stuff'] = 12 to create children
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This will create 'My Stuff' as a child of foo (if it does not exist), and
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do .v = 12 assignment.
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Exception:
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wb.foo['bar'] = 12
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will create a child with headline '@k bar', because bar is a valid python name
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and we don't want to crowd the WorkBook namespace with (possibly numerous) entries
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"""
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key = str(key)
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d = self.__children()
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if key in d:
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d[key].v = val
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return
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if not valid_attribute(key):
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head = key
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else:
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head = '@k ' + key
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p = c.createLastChildNode(self.p, head, '')
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LeoNode(p).v = val
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def ipush(self):
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""" Does push-to-ipython on the node """
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push_from_leo(self)
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def go(self):
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""" Set node as current node (to quickly see it in Outline) """
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c.beginUpdate()
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try:
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c.setCurrentPosition(self.p)
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finally:
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c.endUpdate()
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def script(self):
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""" Method to get the 'tangled' contents of the node
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(parse @others, << section >> references etc.)
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"""
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return g.getScript(c,self.p,useSelectedText=False,useSentinels=False)
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def __get_uA(self):
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p = self.p
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# Create the uA if necessary.
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if not hasattr(p.v.t,'unknownAttributes'):
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p.v.t.unknownAttributes = {}
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d = p.v.t.unknownAttributes.setdefault('ipython', {})
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return d
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uA = property(__get_uA, doc = "Access persistent unknownAttributes of node")
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class LeoWorkbook:
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""" class for 'advanced' node access
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Has attributes for all "discoverable" nodes. Node is discoverable if it
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either
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- has a valid python name (Foo, bar_12)
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- is a parent of an anchor node (if it has a child '@a foo', it is visible as foo)
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"""
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def __getattr__(self, key):
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if key.startswith('_') or key == 'trait_names' or not valid_attribute(key):
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raise AttributeError
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cells = all_cells()
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p = cells.get(key, None)
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if p is None:
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p = add_var(key)
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return LeoNode(p)
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def __str__(self):
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return "<LeoWorkbook>"
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def __setattr__(self,key, val):
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raise AttributeError("Direct assignment to workbook denied, try wb.%s.v = %s" % (key,val))
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__repr__ = __str__
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def __iter__(self):
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""" Iterate all (even non-exposed) nodes """
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cells = all_cells()
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return (LeoNode(p) for p in c.allNodes_iter())
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current = property(lambda self: LeoNode(c.currentPosition()), doc = "Currently selected node")
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def match_h(self, regex):
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cmp = re.compile(regex)
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for node in self:
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if re.match(cmp, node.h, re.IGNORECASE):
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yield node
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return
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ip.user_ns['wb'] = LeoWorkbook()
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@IPython.generics.complete_object.when_type(LeoWorkbook)
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def workbook_complete(obj, prev):
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return all_cells().keys() + [s for s in prev if not s.startswith('_')]
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def add_var(varname):
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c.beginUpdate()
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try:
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p2 = g.findNodeAnywhere(c,varname)
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if p2:
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return
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rootpos = g.findNodeAnywhere(c,'@ipy-results')
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if not rootpos:
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rootpos = c.currentPosition()
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p2 = rootpos.insertAsLastChild()
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c.setHeadString(p2,varname)
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return p2
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finally:
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c.endUpdate()
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def add_file(self,fname):
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p2 = c.currentPosition().insertAfter()
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push_from_leo = CommandChainDispatcher()
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def expose_ileo_push(f, prio = 0):
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push_from_leo.add(f, prio)
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def push_ipython_script(node):
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""" Execute the node body in IPython, as if it was entered in interactive prompt """
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c.beginUpdate()
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try:
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ohist = ip.IP.output_hist
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hstart = len(ip.IP.input_hist)
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script = node.script()
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script = g.splitLines(script + '\n')
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ip.runlines(script)
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has_output = False
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for idx in range(hstart,len(ip.IP.input_hist)):
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val = ohist.get(idx,None)
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if val is None:
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continue
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has_output = True
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inp = ip.IP.input_hist[idx]
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if inp.strip():
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es('In: %s' % (inp[:40], ))
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es('<%d> %s' % (idx, pprint.pformat(ohist[idx],width = 40)))
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if not has_output:
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es('ipy run: %s (%d LL)' %( node.h,len(script)))
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finally:
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c.endUpdate()
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# this should be the LAST one that will be executed, and it will never raise TryNext
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expose_ileo_push(push_ipython_script, 1000)
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def eval_body(body):
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try:
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val = ip.ev(body)
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except:
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# just use stringlist if it's not completely legal python expression
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val = IPython.genutils.SList(body.splitlines())
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return val
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def push_plain_python(node):
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if not node.h.endswith('P'):
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raise TryNext
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script = node.script()
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lines = script.count('\n')
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try:
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exec script in ip.user_ns
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except:
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print " -- Exception in script:\n"+script + "\n --"
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raise
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es('ipy plain: %s (%d LL)' % (node.h,lines))
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expose_ileo_push(push_plain_python, 100)
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def push_cl_node(node):
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""" If node starts with @cl, eval it
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The result is put to root @ipy-results node
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"""
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if not node.b.startswith('@cl'):
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raise TryNext
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p2 = g.findNodeAnywhere(c,'@ipy-results')
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val = node.v
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if p2:
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es("=> @ipy-results")
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LeoNode(p2).v = val
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es(val)
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expose_ileo_push(push_cl_node,100)
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def push_position_from_leo(p):
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push_from_leo(LeoNode(p))
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ip.user_ns['leox'].push = push_position_from_leo
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def leo_f(self,s):
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""" open file(s) in Leo
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Takes an mglob pattern, e.g. '%leo *.cpp' or %leo 'rec:*.cpp'
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"""
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import os
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from IPython.external import mglob
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files = mglob.expand(s)
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c.beginUpdate()
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try:
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for fname in files:
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p = g.findNodeAnywhere(c,'@auto ' + fname)
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if not p:
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p = c.currentPosition().insertAfter()
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p.setHeadString('@auto ' + fname)
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if os.path.isfile(fname):
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c.setBodyString(p,open(fname).read())
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c.selectPosition(p)
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finally:
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c.endUpdate()
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ip.expose_magic('leo',leo_f)
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def leoref_f(self,s):
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""" Quick reference for ILeo """
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import textwrap
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print textwrap.dedent("""\
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%leo file - open file in leo
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wb.foo.v - eval node foo (i.e. headstring is 'foo' or '@ipy foo')
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wb.foo.v = 12 - assign to body of node foo
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wb.foo.b - read or write the body of node foo
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wb.foo.l - body of node foo as string list
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for el in wb.foo:
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print el.v
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"""
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)
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ip.expose_magic('leoref',leoref_f)
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def show_welcome():
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print "------------------"
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print "Welcome to Leo-enabled IPython session!"
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print "Try %leoref for quick reference."
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import IPython.platutils
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IPython.platutils.set_term_title('ILeo')
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IPython.platutils.freeze_term_title()
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def run_leo_startup_node():
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p = g.findNodeAnywhere(c,'@ipy-startup')
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if p:
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print "Running @ipy-startup nodes"
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for n in LeoNode(p):
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push_from_leo(n)
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run_leo_startup_node()
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show_welcome()
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