Demo/cwilib/cwilib.py

   1 # Interface to the interactive CWI library catalog.
   2
   3 import sys
   4 import stdwin
   5 from stdwinevents import *
   6 import select
   7 import telnetlib
   8 import vt100win
   9 from form import Form
  10
  11
  12 # Main program
  13
  14 def main():
  15     vt = vt100win.VT100win()
  16     #
  17     host = 'biefstuk.cwi.nl'
  18     tn = telnetlib.Telnet(host, 0)
  19     #
  20     try:
  21         vt.send(tn.read_until('login: ', 10))
  22         tn.write('cwilib\r')
  23         #
  24         vt.send(tn.read_until('Hit <RETURN> to continue...', 10))
  25         tn.write('\r')
  26         #
  27         vt.send(tn.read_until('QUIT', 20))
  28     except EOFError:
  29         sys.stderr.write('Connection closed prematurely\n')
  30         sys.exit(1)
  31     #
  32     define_screens(vt)
  33     matches = vt.which_screens()
  34     if 'menu' not in matches:
  35         sys.stderr.write('Main menu does not appear\n')
  36         sys.exit(1)
  37     #
  38     tn.write('\r\r')
  39     vt.open('Progress -- CWI Library')
  40     vt.set_debuglevel(0)
  41     ui = UserInterface()
  42     #
  43     while 1:
  44         try:
  45             data = tn.read_very_eager()
  46         except EOFError:
  47             stdwin.message('Connection closed--goodbye')
  48             break
  49         if data:
  50             print 'send...'
  51             vt.send(data)
  52             print 'send...done'
  53             continue
  54         event = stdwin.pollevent()
  55         if event:
  56             type, window, detail = event
  57             if window == None and type == WE_LOST_SEL:
  58                 window = ui.queryform.window
  59                 event = type, window, detail
  60             if type == WE_CLOSE:
  61                 break
  62             if window in ui.windows:
  63                 ui.dispatch(type, window, detail)
  64             elif window == vt.window:
  65                 if type == WE_NULL:
  66                     pass
  67                 elif type == WE_COMMAND:
  68                     if detail == WC_RETURN:
  69                         tn.write('\r')
  70                     elif detail == WC_BACKSPACE:
  71                         tn.write('\b')
  72                     elif detail == WC_TAB:
  73                         tn.write('\t')
  74                     elif detail == WC_UP:
  75                         tn.write('\033[A')
  76                     elif detail == WC_DOWN:
  77                         tn.write('\033[B')
  78                     elif detail == WC_RIGHT:
  79                         tn.write('\033[C')
  80                     elif detail == WC_LEFT:
  81                         tn.write('\033[D')
  82                     else:
  83                         print '*** Command:', detail
  84                 elif type == WE_CHAR:
  85                     tn.write(detail)
  86                 elif type == WE_DRAW:
  87                     vt.draw(detail)
  88                 elif type in (WE_ACTIVATE, WE_DEACTIVATE):
  89                     pass
  90                 else:
  91                     print '*** VT100 event:', type, detail
  92             else:
  93                 print '*** Alien event:', type, window, detail
  94             continue
  95         rfd, wfd, xfd = select.select([tn, stdwin], [], [])
  96
  97
  98 # Subroutine to define our screen recognition patterns
  99
 100 def define_screens(vt):
 101     vt.define_screen('menu', {
 102               'title': ('search', 0, 0, 80,
 103                         ' SEARCH FUNCTIONS  +OTHER FUNCTIONS '),
 104               })
 105     vt.define_screen('search', {
 106               'title': ('search', 0, 0, 80, ' Search '),
 107               })
 108     vt.define_screen('shortlist', {'title': ('search', 0, 0, 80,
 109               ' Short-list')})
 110     vt.define_screen('showrecord', {
 111               'title': ('search', 0, 0, 80, ' Show record '),
 112               })
 113     vt.define_screen('timelimit', {
 114               'limit': ('search', 12, 0, 80, ' TIME LIMIT '),
 115               })
 116     vt.define_screen('attention', {
 117               'BASE': ('copy', 0, 0, 0, 'search'),
 118               'title': ('search', 10, 0, 80, ' ATTENTION ')})
 119     vt.define_screen('syntaxerror', {
 120               'BASE': ('copy', 0, 0, 0, 'attention'),
 121               'message': ('search', 12, 0, 80, ' Syntax error'),
 122               })
 123     vt.define_screen('emptyerror', {
 124               'BASE': ('copy', 0, 0, 0, 'attention'),
 125               'message': ('search', 12, 0, 80,
 126                           ' Check your input. Search at least one term'),
 127               })
 128     vt.define_screen('unsortedwarning', {
 129               'BASE': ('copy', 0, 0, 0, 'attention'),
 130               'message': ('search', 12, 0, 80,
 131                           ' Number of records exceeds sort limit'),
 132               })
 133     vt.define_screen('thereismore', {
 134               'BASE': ('copy', 0, 0, 0, 'showrecord'),
 135               'message': ('search', 15, 0, 80,
 136                  'There is more within this record. Use the arrow keys'),
 137               })
 138     vt.define_screen('nofurther', {
 139               'BASE': ('copy', 0, 0, 0, 'showrecord'),
 140               'message': ('search', 17, 0, 80, 'You cannot go further\.'),
 141               })
 142     vt.define_screen('nofurtherback', {
 143               'BASE': ('copy', 0, 0, 0, 'showrecord'),
 144               'message': ('search', 17, 0, 80,
 145                           'You cannot go further back'),
 146               })
 147
 148
 149 # Class to implement our user interface.
 150
 151 class UserInterface:
 152
 153     def __init__(self):
 154         stdwin.setfont('7x14')
 155         self.queryform = QueryForm()
 156         self.listform = ListForm()
 157         self.recordform = RecordForm()
 158         self.forms = [self.queryform, self.listform, self.recordform]
 159         define_query_fields(self.queryform)
 160         self.windows = []
 161         for form in self.forms:
 162             if form.formheight > 0:
 163                 form.open()
 164                 self.windows.append(form.window)
 165
 166     def __del__(self):
 167         self.close()
 168
 169     def close(self):
 170         for form in self.forms:
 171             form.close()
 172
 173     def dispatch(self, type, window, detail):
 174         for form in self.forms:
 175             if window == form.window:
 176                 form.dispatch(type, detail)
 177
 178
 179 def define_query_fields(f):
 180     f.define_field('name', 'Name auth./ed.', 1, 60)
 181     f.define_field('title',  'Title', 4, 60)
 182     f.define_field('shelfmark', 'Shelf mark', 1, 60)
 183     f.define_field('class', 'Prim. classif.', 1, 60)
 184     f.define_field('series', 'Series', 1, 60)
 185     f.define_field('congress', 'Congr. pl./year', 1, 60)
 186     f.define_field('type', 'Type', 1, 60)
 187
 188
 189 class QueryForm(Form):
 190
 191     def __init__(self):
 192         Form.__init__(self, 'Query form -- CWI Library')
 193
 194     def dispatch(self, type, detail):
 195         if type == WE_COMMAND and detail == WC_RETURN:
 196             print '*** SUBMIT ***'
 197         else:
 198             Form.dispatch(self, type, detail)
 199
 200
 201 class ListForm(Form):
 202
 203     def __init__(self):
 204         Form.__init__(self, 'Short list -- CWI Library')
 205
 206
 207 class RecordForm(Form):
 208
 209     def __init__(self):
 210         Form.__init__(self, 'Record detail -- CWI Library')
 211
 212
 213 main()