cpython/Lib/irix5/flp.py

315 lines
8.4 KiB
Python
Executable File

#
# flp - Module to load fl forms from fd files
#
# Jack Jansen, December 1991
#
import string
import path
import sys
import fl
import FL
SPLITLINE = '--------------------'
FORMLINE = '=============== FORM ==============='
ENDLINE = '=============================='
error = 'flp.error'
##################################################################
# Part 1 - The parsing routines #
##################################################################
#
# Externally visible function. Load form.
#
def parse_form(filename, formname):
fp = _open_formfile(filename)
nforms = _parse_fd_header(fp)
for i in range(nforms):
form = _parse_fd_form(fp, formname)
if form <> None:
return form
raise error, 'No such form in fd file'
#
# Externally visible function. Load all forms.
#
def parse_forms(filename):
fp = _open_formfile(filename)
nforms = _parse_fd_header(fp)
forms = {}
for i in range(nforms):
form = _parse_fd_form(fp, None)
forms[form[0].Name] = form
return forms
#
# Internal: Locate form file (using PYTHONPATH) and open file
#
def _open_formfile(filename):
if filename[-3:] <> '.fd':
filename = filename + '.fd'
if filename[0] = '/':
try:
fp = open(filename,'r')
except IOError:
fp = None
else:
for pc in sys.path:
pn = path.join(pc, filename)
try:
fp = open(pn, 'r')
break
except IOError:
fp = None
if fp = None:
raise error, 'Cannot find forms file ' + filename
return fp
#
# Internal: parse the fd file header, return number of forms
#
def _parse_fd_header(file):
# First read the magic header line
datum = _parse_1_line(file)
if datum <> ('Magic', 12321):
raise error, 'Not a forms definition file'
# Now skip until we know number of forms
while 1:
datum = _parse_1_line(file)
if type(datum) = type(()) and datum[0] = 'Numberofforms':
break
return datum[1]
#
# Internal: parse fd form, or skip if name doesn't match.
# the special value None means 'allways parse it'.
#
def _parse_fd_form(file, name):
datum = _parse_1_line(file)
if datum <> FORMLINE:
raise error, 'Missing === FORM === line'
form = _parse_object(file)
if form.Name = name or name = None:
objs = []
for j in range(form.Numberofobjects):
obj = _parse_object(file)
objs.append(obj)
return (form, objs)
else:
for j in range(form.Numberofobjects):
_skip_object(file)
return None
#
# Internal class: a convient place to store object info fields
#
class _newobj:
def init(self):
return self
def add(self, (name, value)):
cmd = 'self.'+name+' = '+`value`+'\n'
exec(cmd)
#
# Internal parsing routines.
#
def _parse_string(str):
return str
def _parse_num(str):
return eval(str)
def _parse_numlist(str):
slist = string.split(str)
nlist = []
for i in slist:
nlist.append(_parse_num(i))
return nlist
# This dictionary maps item names to parsing routines.
# If no routine is given '_parse_num' is default.
_parse_func = { \
'Name': _parse_string, \
'Box': _parse_numlist, \
'Colors': _parse_numlist, \
'Label': _parse_string, \
'Name': _parse_string, \
'Callback': _parse_string, \
'Argument': _parse_string }
# This function parses a line, and returns either
# a string or a tuple (name,value)
import regexp
def _parse_line(line):
a = regexp.match('^([^:]*): *(.*)', line)
if not a:
return line
name = line[:a[1][1]]
if name[0] = 'N':
name = string.joinfields(string.split(name),'')
name = string.lower(name)
name = string.upper(name[0]) + name[1:]
value = line[a[2][0]:]
try:
pf = _parse_func[name]
except KeyError:
pf = _parse_num
value = pf(value)
return (name, value)
def _readline(file):
line = file.readline()
if not line:
raise EOFError
return line[:-1]
def _parse_1_line(file):
line = _readline(file)
while line = '':
line = _readline(file)
return _parse_line(line)
def _skip_object(file):
line = ''
while not line in (SPLITLINE, FORMLINE, ENDLINE):
pos = file.tell()
line = _readline(file)
if line = FORMLINE:
file.seek(pos)
def _parse_object(file):
obj = _newobj().init()
while 1:
pos = file.tell()
datum = _parse_1_line(file)
if datum in (SPLITLINE, FORMLINE, ENDLINE):
if datum = FORMLINE:
file.seek(pos)
return obj
if type(datum) <> type(()):
raise error, 'Parse error, illegal line in object: '+datum
obj.add(datum)
#################################################################
# Part 2 - High-level object/form creation routines #
#################################################################
#
# External - Create a form an link to an instance variable.
#
def create_full_form(inst, (fdata, odatalist)):
form = create_form(fdata)
exec('inst.'+fdata.Name+' = form\n')
for odata in odatalist:
create_object_instance(inst, form, odata)
#
# External - Merge a form into an existing form in an instance
# variable.
#
def merge_full_form(inst, form, (fdata, odatalist)):
exec('inst.'+fdata.Name+' = form\n')
if odatalist[0].Class <> FL.BOX:
raise error, 'merge_full_form() expects FL.BOX as first obj'
for odata in odatalist[1:]:
create_object_instance(inst, form, odata)
#################################################################
# Part 3 - Low-level object/form creation routines #
#################################################################
#
# External Create_form - Create form from parameters
#
def create_form(fdata):
return fl.make_form(FL.NO_BOX,fdata.Width, fdata.Height)
#
# External create_object - Create an object. Make sure there are
# no callbacks. Returns the object created.
#
def create_object(form, odata):
obj = _create_object(form, odata)
if odata.Callback:
raise error, 'Creating free object with callback'
return obj
#
# External create_object_instance - Create object in an instance.
#
def create_object_instance(inst, form, odata):
obj = _create_object(form, odata)
if odata.Callback:
cbfunc = eval('inst.'+odata.Callback)
obj.set_call_back(cbfunc, odata.Argument)
if odata.Name:
exec('inst.' + odata.Name + ' = obj\n')
#
# Internal _create_object: Create the object and fill options
#
def _create_object(form, odata):
crfunc = _select_crfunc(form, odata.Class)
obj = crfunc(odata.Type, odata.Box[0], odata.Box[1], odata.Box[2], \
odata.Box[3], odata.Label)
if not odata.Class in (FL.BEGIN_GROUP, FL.END_GROUP):
obj.boxtype = odata.Boxtype
obj.col1 = odata.Colors[0]
obj.col2 = odata.Colors[1]
obj.align = odata.Alignment
obj.lstyle = odata.Style
obj.lsize = odata.Size
obj.lcol = odata.Lcol
return obj
#
# Internal crfunc: helper function that returns correct create function
#
def _select_crfunc(fm, cl):
if cl = FL.BEGIN_GROUP: return fm.bgn_group
elif cl = FL.END_GROUP: return fm.end_group
elif cl = FL.BITMAP: return fm.add_bitmap
elif cl = FL.BOX: return fm.add_box
elif cl = FL.BROWSER: return fm.add_browser
elif cl = FL.BUTTON: return fm.add_button
elif cl = FL.CHART: return fm.add_chart
elif cl = FL.CHOICE: return fm.add_choice
elif cl = FL.CLOCK: return fm.add_clock
elif cl = FL.COUNTER: return fm.add_counter
elif cl = FL.DIAL: return fm.add_dial
elif cl = FL.FREE: return fm.add_free
elif cl = FL.INPUT: return fm.add_input
elif cl = FL.LIGHTBUTTON: return fm.add_lightbutton
elif cl = FL.MENU: return fm.add_menu
elif cl = FL.POSITIONER: return fm.add_positioner
elif cl = FL.ROUNDBUTTON: return fm.add_roundbutton
elif cl = FL.SLIDER: return fm.add_slider
elif cl = FL.VALSLIDER: return fm.add_valslider
elif cl = FL.TEXT: return fm.add_text
elif cl = FL.TIMER: return fm.add_timer
else:
raise error, 'Unknown object type: ' + `cl`
def test():
if len(sys.argv) == 2:
forms = parse_forms(sys.argv[1])
for i in forms.keys():
_printform(forms[i])
elif len(sys.argv) == 3:
form = parse_form(sys.argv[1], sys.argv[2])
_printform(form)
else:
print 'Usage: test fdfile [form]'
def _printform(form):
f = form[0]
objs = form[1]
print 'Form ', f.Name, ', size: ', f.Width, f.Height, ' Nobj ', f.Numberofobjects
for i in objs:
print ' Obj ', i.Name, ' type ', i.Class, i.Type
print ' Box ', i.Box, ' btype ', i.Boxtype
print ' Label ', i.Label, ' size/style/col/align ', i.Size,i.Style, i.Lcol, i.Alignment
print ' cols ', i.Colors
print ' cback ', i.Callback, i.Argument