| # |
| # 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 |