Initial commit

pexpect/ANSI.py

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+"""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()