--- /dev/null
+"""This implements an ANSI terminal emulator as a subclass of screen.
+
+$Id: ANSI.py 491 2007-12-16 20:04:57Z noah $
+"""
+# references:
+# http://www.retards.org/terminals/vt102.html
+# http://vt100.net/docs/vt102-ug/contents.html
+# http://vt100.net/docs/vt220-rm/
+# http://www.termsys.demon.co.uk/vtansi.htm
+
+import screen
+import FSM
+import copy
+import string
+
+def Emit (fsm):
+
+ screen = fsm.memory[0]
+ screen.write_ch(fsm.input_symbol)
+
+def StartNumber (fsm):
+
+ fsm.memory.append (fsm.input_symbol)
+
+def BuildNumber (fsm):
+
+ ns = fsm.memory.pop()
+ ns = ns + fsm.input_symbol
+ fsm.memory.append (ns)
+
+def DoBackOne (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_back ()
+
+def DoBack (fsm):
+
+ count = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ screen.cursor_back (count)
+
+def DoDownOne (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_down ()
+
+def DoDown (fsm):
+
+ count = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ screen.cursor_down (count)
+
+def DoForwardOne (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_forward ()
+
+def DoForward (fsm):
+
+ count = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ screen.cursor_forward (count)
+
+def DoUpReverse (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_up_reverse()
+
+def DoUpOne (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_up ()
+
+def DoUp (fsm):
+
+ count = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ screen.cursor_up (count)
+
+def DoHome (fsm):
+
+ c = int(fsm.memory.pop())
+ r = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ screen.cursor_home (r,c)
+
+def DoHomeOrigin (fsm):
+
+ c = 1
+ r = 1
+ screen = fsm.memory[0]
+ screen.cursor_home (r,c)
+
+def DoEraseDown (fsm):
+
+ screen = fsm.memory[0]
+ screen.erase_down()
+
+def DoErase (fsm):
+
+ arg = int(fsm.memory.pop())
+ screen = fsm.memory[0]
+ if arg == 0:
+ screen.erase_down()
+ elif arg == 1:
+ screen.erase_up()
+ elif arg == 2:
+ screen.erase_screen()
+
+def DoEraseEndOfLine (fsm):
+
+ screen = fsm.memory[0]
+ screen.erase_end_of_line()
+
+def DoEraseLine (fsm):
+
+ screen = fsm.memory[0]
+ if arg == 0:
+ screen.end_of_line()
+ elif arg == 1:
+ screen.start_of_line()
+ elif arg == 2:
+ screen.erase_line()
+
+def DoEnableScroll (fsm):
+
+ screen = fsm.memory[0]
+ screen.scroll_screen()
+
+def DoCursorSave (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_save_attrs()
+
+def DoCursorRestore (fsm):
+
+ screen = fsm.memory[0]
+ screen.cursor_restore_attrs()
+
+def DoScrollRegion (fsm):
+
+ screen = fsm.memory[0]
+ r2 = int(fsm.memory.pop())
+ r1 = int(fsm.memory.pop())
+ screen.scroll_screen_rows (r1,r2)
+
+def DoMode (fsm):
+
+ screen = fsm.memory[0]
+ mode = fsm.memory.pop() # Should be 4
+ # screen.setReplaceMode ()
+
+def Log (fsm):
+
+ screen = fsm.memory[0]
+ fsm.memory = [screen]
+ fout = open ('log', 'a')
+ fout.write (fsm.input_symbol + ',' + fsm.current_state + '\n')
+ fout.close()
+
+class term (screen.screen):
+ """This is a placeholder.
+ In theory I might want to add other terminal types.
+ """
+ def __init__ (self, r=24, c=80):
+ screen.screen.__init__(self, r,c)
+
+class ANSI (term):
+
+ """This class encapsulates a generic terminal. It filters a stream and
+ maintains the state of a screen object. """
+
+ def __init__ (self, r=24,c=80):
+
+ term.__init__(self,r,c)
+
+ #self.screen = screen (24,80)
+ self.state = FSM.FSM ('INIT',[self])
+ self.state.set_default_transition (Log, 'INIT')
+ self.state.add_transition_any ('INIT', Emit, 'INIT')
+ self.state.add_transition ('\x1b', 'INIT', None, 'ESC')
+ self.state.add_transition_any ('ESC', Log, 'INIT')
+ self.state.add_transition ('(', 'ESC', None, 'G0SCS')
+ self.state.add_transition (')', 'ESC', None, 'G1SCS')
+ self.state.add_transition_list ('AB012', 'G0SCS', None, 'INIT')
+ self.state.add_transition_list ('AB012', 'G1SCS', None, 'INIT')
+ self.state.add_transition ('7', 'ESC', DoCursorSave, 'INIT')
+ self.state.add_transition ('8', 'ESC', DoCursorRestore, 'INIT')
+ self.state.add_transition ('M', 'ESC', DoUpReverse, 'INIT')
+ self.state.add_transition ('>', 'ESC', DoUpReverse, 'INIT')
+ self.state.add_transition ('<', 'ESC', DoUpReverse, 'INIT')
+ self.state.add_transition ('=', 'ESC', None, 'INIT') # Selects application keypad.
+ self.state.add_transition ('#', 'ESC', None, 'GRAPHICS_POUND')
+ self.state.add_transition_any ('GRAPHICS_POUND', None, 'INIT')
+ self.state.add_transition ('[', 'ESC', None, 'ELB')
+ # ELB means Escape Left Bracket. That is ^[[
+ self.state.add_transition ('H', 'ELB', DoHomeOrigin, 'INIT')
+ self.state.add_transition ('D', 'ELB', DoBackOne, 'INIT')
+ self.state.add_transition ('B', 'ELB', DoDownOne, 'INIT')
+ self.state.add_transition ('C', 'ELB', DoForwardOne, 'INIT')
+ self.state.add_transition ('A', 'ELB', DoUpOne, 'INIT')
+ self.state.add_transition ('J', 'ELB', DoEraseDown, 'INIT')
+ self.state.add_transition ('K', 'ELB', DoEraseEndOfLine, 'INIT')
+ self.state.add_transition ('r', 'ELB', DoEnableScroll, 'INIT')
+ self.state.add_transition ('m', 'ELB', None, 'INIT')
+ self.state.add_transition ('?', 'ELB', None, 'MODECRAP')
+ self.state.add_transition_list (string.digits, 'ELB', StartNumber, 'NUMBER_1')
+ self.state.add_transition_list (string.digits, 'NUMBER_1', BuildNumber, 'NUMBER_1')
+ self.state.add_transition ('D', 'NUMBER_1', DoBack, 'INIT')
+ self.state.add_transition ('B', 'NUMBER_1', DoDown, 'INIT')
+ self.state.add_transition ('C', 'NUMBER_1', DoForward, 'INIT')
+ self.state.add_transition ('A', 'NUMBER_1', DoUp, 'INIT')
+ self.state.add_transition ('J', 'NUMBER_1', DoErase, 'INIT')
+ self.state.add_transition ('K', 'NUMBER_1', DoEraseLine, 'INIT')
+ self.state.add_transition ('l', 'NUMBER_1', DoMode, 'INIT')
+ ### It gets worse... the 'm' code can have infinite number of
+ ### number;number;number before it. I've never seen more than two,
+ ### but the specs say it's allowed. crap!
+ self.state.add_transition ('m', 'NUMBER_1', None, 'INIT')
+ ### LED control. Same problem as 'm' code.
+ self.state.add_transition ('q', 'NUMBER_1', None, 'INIT')
+
+ # \E[?47h appears to be "switch to alternate screen"
+ # \E[?47l restores alternate screen... I think.
+ self.state.add_transition_list (string.digits, 'MODECRAP', StartNumber, 'MODECRAP_NUM')
+ self.state.add_transition_list (string.digits, 'MODECRAP_NUM', BuildNumber, 'MODECRAP_NUM')
+ self.state.add_transition ('l', 'MODECRAP_NUM', None, 'INIT')
+ self.state.add_transition ('h', 'MODECRAP_NUM', None, 'INIT')
+
+#RM Reset Mode Esc [ Ps l none
+ self.state.add_transition (';', 'NUMBER_1', None, 'SEMICOLON')
+ self.state.add_transition_any ('SEMICOLON', Log, 'INIT')
+ self.state.add_transition_list (string.digits, 'SEMICOLON', StartNumber, 'NUMBER_2')
+ self.state.add_transition_list (string.digits, 'NUMBER_2', BuildNumber, 'NUMBER_2')
+ self.state.add_transition_any ('NUMBER_2', Log, 'INIT')
+ self.state.add_transition ('H', 'NUMBER_2', DoHome, 'INIT')
+ self.state.add_transition ('f', 'NUMBER_2', DoHome, 'INIT')
+ self.state.add_transition ('r', 'NUMBER_2', DoScrollRegion, 'INIT')
+ ### It gets worse... the 'm' code can have infinite number of
+ ### number;number;number before it. I've never seen more than two,
+ ### but the specs say it's allowed. crap!
+ self.state.add_transition ('m', 'NUMBER_2', None, 'INIT')
+ ### LED control. Same problem as 'm' code.
+ self.state.add_transition ('q', 'NUMBER_2', None, 'INIT')
+
+ def process (self, c):
+
+ self.state.process(c)
+
+ def process_list (self, l):
+
+ self.write(l)
+
+ def write (self, s):
+
+ for c in s:
+ self.process(c)
+
+ def flush (self):
+
+ pass
+
+ def write_ch (self, ch):
+
+ """This puts a character at the current cursor position. cursor
+ position if moved forward with wrap-around, but no scrolling is done if
+ the cursor hits the lower-right corner of the screen. """
+
+ #\r and \n both produce a call to crlf().
+ ch = ch[0]
+
+ if ch == '\r':
+ # self.crlf()
+ return
+ if ch == '\n':
+ self.crlf()
+ return
+ if ch == chr(screen.BS):
+ self.cursor_back()
+ self.put_abs(self.cur_r, self.cur_c, ' ')
+ return
+
+ if ch not in string.printable:
+ fout = open ('log', 'a')
+ fout.write ('Nonprint: ' + str(ord(ch)) + '\n')
+ fout.close()
+ return
+ self.put_abs(self.cur_r, self.cur_c, ch)
+ old_r = self.cur_r
+ old_c = self.cur_c
+ self.cursor_forward()
+ if old_c == self.cur_c:
+ self.cursor_down()
+ if old_r != self.cur_r:
+ self.cursor_home (self.cur_r, 1)
+ else:
+ self.scroll_up ()
+ self.cursor_home (self.cur_r, 1)
+ self.erase_line()
+
+# def test (self):
+#
+# import sys
+# write_text = 'I\'ve got a ferret sticking up my nose.\n' + \
+# '(He\'s got a ferret sticking up his nose.)\n' + \
+# 'How it got there I can\'t tell\n' + \
+# 'But now it\'s there it hurts like hell\n' + \
+# 'And what is more it radically affects my sense of smell.\n' + \
+# '(His sense of smell.)\n' + \
+# 'I can see a bare-bottomed mandril.\n' + \
+# '(Slyly eyeing his other nostril.)\n' + \
+# 'If it jumps inside there too I really don\'t know what to do\n' + \
+# 'I\'ll be the proud posessor of a kind of nasal zoo.\n' + \
+# '(A nasal zoo.)\n' + \
+# 'I\'ve got a ferret sticking up my nose.\n' + \
+# '(And what is worst of all it constantly explodes.)\n' + \
+# '"Ferrets don\'t explode," you say\n' + \
+# 'But it happened nine times yesterday\n' + \
+# 'And I should know for each time I was standing in the way.\n' + \
+# 'I\'ve got a ferret sticking up my nose.\n' + \
+# '(He\'s got a ferret sticking up his nose.)\n' + \
+# 'How it got there I can\'t tell\n' + \
+# 'But now it\'s there it hurts like hell\n' + \
+# 'And what is more it radically affects my sense of smell.\n' + \
+# '(His sense of smell.)'
+# self.fill('.')
+# self.cursor_home()
+# for c in write_text:
+# self.write_ch (c)
+# print str(self)
+#
+#if __name__ == '__main__':
+# t = ANSI(6,65)
+# t.test()
git.ucc.asn.au / progcomp10.git / blobdiff
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