ipy_leo: @ipy-startup

IPython/Extensions/ipy_leo.py

@@ -1,284 +1,291 b''
 """ Leo plugin for IPython
 
 Example use:
 
 nodes.foo = "hello world"
 
   -> create '@ipy foo' node with text "hello world"
 
 Access works also, and so does tab completion.
    
 """
 import IPython.ipapi
 import IPython.genutils
 import IPython.generics
 import re
 
 
 
 ip = IPython.ipapi.get()
 leo = ip.user_ns['leox']
 c,g = leo.c, leo.g
 
 # will probably be overwritten by user, but handy for experimentation early on
 ip.user_ns['c'] = c
 ip.user_ns['g'] = g
 
 
 from IPython.external.simplegeneric import generic 
 import pprint
 
 @generic
 def format_for_leo(obj):
     """ Convert obj to string representiation (for editing in Leo)"""
     return pprint.pformat(obj)
 
 @format_for_leo.when_type(list)
 def format_list(obj):
     return "\n".join(str(s) for s in obj)
 
 nodename_re = r'(@ipy?[\w-]+)?\s?(\w+)'
 
 def all_cells():
     d = {}
     for p in c.allNodes_iter():
         h = p.headString()
         if h.startswith('@') and len(h.split()) == 1: 
             continue
         mo = re.match(nodename_re, h)
         if not mo:
             continue
         d[mo.group(2)] = p.copy()
     return d    
     
 
 class TrivialLeoWorkbook:
     """ class to find cells with simple syntax
     
     """
     def __getattr__(self, key):
         cells = all_cells()
         p = cells[key]
         body = p.bodyString()
         return eval_body(body)
     def __setattr__(self,key,val):
         cells = all_cells()
         p = cells.get(key,None)
         if p is None:
             add_var(key,val)
         else:
             c.setBodyString(p,format_for_leo(val))
     def __str__(self):
         return "<TrivialLeoWorkbook>"
     __repr__ = __str__
 
 ip.user_ns['nodes'] = TrivialLeoWorkbook()            
 
 
 class LeoNode(object):
     def __init__(self,p):
         self.p = p.copy()
 
     def get_h(self): return self.p.headString()
     def set_h(self,val):
         print "set head",val
         c.beginUpdate() 
         try:
             c.setHeadString(self.p,val)
         finally:
             c.endUpdate()
         
     h = property( get_h, set_h)  
 
     def get_b(self): return self.p.bodyString()
     def set_b(self,val):
         print "set body",val
         c.beginUpdate()
         try: 
             c.setBodyString(self.p, val)
         finally:
             c.endUpdate()
     
     b = property(get_b, set_b)
     
     def set_val(self, val):
         self.b = pprint.pformat(val)
         
     v = property(lambda self: ip.ev(self.b.strip()), set_val)
     
     def set_l(self,val):
         self.b = '\n'.join(val )
     l = property(lambda self : IPython.genutils.SList(self.b.splitlines()), 
                  set_l)
     
     def __iter__(self):
         return (LeoNode(p) for p in self.p.children_iter())
      
 
 class LeoWorkbook:
     """ class for 'advanced' node access """
     def __getattr__(self, key):
         if key.startswith('_') or key == 'trait_names':
             raise AttributeError
         cells = all_cells()
         p = cells.get(key, None)
         if p is None:
             p = add_var(key,None)
 
         return LeoNode(p)
 
     def __str__(self):
         return "<LeoWorkbook>"
     __repr__ = __str__
 ip.user_ns['wb'] = LeoWorkbook()
 
 
 _dummyval = object()
 @IPython.generics.complete_object.when_type(LeoWorkbook)
 def workbook_complete(obj, prev):
     return all_cells().keys()
     
 
 def add_var(varname, value = _dummyval):
     c.beginUpdate()
     try:
         
         nodename = '@ipy-var ' + varname
         p2 = g.findNodeAnywhere(c,nodename)
         if not c.positionExists(p2):
             p2 = c.currentPosition().insertAfter()
             c.setHeadString(p2,'@ipy ' + varname)
             
         c.setCurrentPosition(p2)
         if value is _dummyval:
             val = ip.user_ns[varname]
         else:
             val = value
         if val is not None:
             formatted = format_for_leo(val)
             c.setBodyString(p2,formatted)
         return p2
     finally:
         c.endUpdate()
 
 def add_file(self,fname):
     p2 = c.currentPosition().insertAfter()
 
 def push_script(p):
     c.beginUpdate()
     try:
         ohist = ip.IP.output_hist 
         hstart = len(ip.IP.input_hist)
         script = g.getScript(c,p,useSelectedText=False,forcePythonSentinels=False,useSentinels=False)
         
         script = g.splitLines(script + '\n')
         script = ''.join(z for z in script if z.strip())
         
         ip.runlines(script)
         
         has_output = False
         for idx in range(hstart,len(ip.IP.input_hist)):
             val = ohist.get(idx,None)
             if val is None:
                 continue
             has_output = True
             inp = ip.IP.input_hist[idx]
             if inp.strip():
                 g.es('In: %s' % (inp[:40], ),  tabName = 'IPython')
                 
             g.es('<%d> %s' % (idx, pprint.pformat(ohist[idx],width = 40)), tabName = 'IPython')
         
         if not has_output:
             g.es('ipy run: %s' %( p.headString(),), tabName = 'IPython')
     finally:
         c.endUpdate()
     
     
 def eval_body(body):
     try:
         val = ip.ev(body)
     except:
         # just use stringlist if it's not completely legal python expression
         val = IPython.genutils.SList(body.splitlines())
     return val 
     
 def push_variable(p,varname):
     body = p.bodyString()
     val = eval_body(body.strip())
     ip.user_ns[varname] = val
     g.es('ipy var: %s' % (varname,), tabName = "IPython")
 
 def push_plain_python(p):
     script = g.getScript(c,p,useSelectedText=False,forcePythonSentinels=False,useSentinels=False)
     exec script in ip.user_ns
     g.es('ipy plain: %s' % (p.headString(),), tabName = "IPython")
     
 def push_from_leo(p):
     h =  p.headString()   
     tup = h.split(None,1)
     # @ipy foo is variable foo
     if len(tup) == 2 and tup[0] == '@ipy':
         varname = tup[1]
         push_variable(p,varname)
         return
     if h.endswith('P'):
         push_plain_python(p)
         return
 
     push_script(p)
     return
     
     
 ip.user_ns['leox'].push = push_from_leo    
     
 def leo_f(self,s):
     """ open file(s) in Leo
     
     Takes an mglob pattern, e.g. '%leo *.cpp' or %leo 'rec:*.cpp'  
     """
     import os
     from IPython.external import mglob
     
     files = mglob.expand(s)
     c.beginUpdate()
     try:
         for fname in files:
             p = g.findNodeAnywhere(c,'@auto ' + fname)
             if not p:
                 p = c.currentPosition().insertAfter()
             
             p.setHeadString('@auto ' + fname)
             if os.path.isfile(fname):
                 c.setBodyString(p,open(fname).read())
             c.selectPosition(p)
     finally:
         c.endUpdate()
 
 ip.expose_magic('leo',leo_f)
 
 def leoref_f(self,s):
     import textwrap
     print textwrap.dedent("""\
     %leo file - open file in leo
     wb.foo.v  - eval node foo (i.e. headstring is 'foo' or '@ipy foo')
     wb.foo.v = 12 - assign to body of node foo
     wb.foo.b - read or write the body of node foo
     wb.foo.l - body of node foo as string list
     
     for el in wb.foo:
       print el.v
-      
-    
+       
     """
     )
 ip.expose_magic('leoref',leoref_f)
 
 def show_welcome():
     print "------------------"
     print "Welcome to Leo-enabled IPython session!"
     print "Try %leoref for quick reference."
     import IPython.platutils
     IPython.platutils.set_term_title('Leo IPython')
     IPython.platutils.freeze_term_title()
+
+def run_leo_startup_node():
+    p = g.findNodeAnywhere(c,'@ipy-startup')
+    if p:
+        print "Running @ipy-startup"
+        push_script(p)
+
+run_leo_startup_node()
 show_welcome()
-    
+