"""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') # Selects application keypad. self.state.add_transition('=', 'ESC', None, 'INIT') 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()