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