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