mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-29 08:19:01 -04:00
b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
350 lines
10 KiB
Python
350 lines
10 KiB
Python
"""This implements a virtual screen. This is used to support ANSI terminal
|
|
emulation. The screen representation and state is implemented in this class.
|
|
Most of the methods are inspired by ANSI screen control codes. The ANSI class
|
|
extends this class to add parsing of ANSI escape codes.
|
|
|
|
$Id: screen.py 486 2007-07-13 01:04:16Z noah $
|
|
"""
|
|
|
|
import copy
|
|
|
|
NUL = 0 # Fill character; ignored on input.
|
|
ENQ = 5 # Transmit answerback message.
|
|
BEL = 7 # Ring the bell.
|
|
BS = 8 # Move cursor left.
|
|
HT = 9 # Move cursor to next tab stop.
|
|
LF = 10 # Line feed.
|
|
VT = 11 # Same as LF.
|
|
FF = 12 # Same as LF.
|
|
CR = 13 # Move cursor to left margin or newline.
|
|
SO = 14 # Invoke G1 character set.
|
|
SI = 15 # Invoke G0 character set.
|
|
XON = 17 # Resume transmission.
|
|
XOFF = 19 # Halt transmission.
|
|
CAN = 24 # Cancel escape sequence.
|
|
SUB = 26 # Same as CAN.
|
|
ESC = 27 # Introduce a control sequence.
|
|
DEL = 127 # Fill character; ignored on input.
|
|
SPACE = chr(32) # Space or blank character.
|
|
|
|
|
|
def constrain(n, min, max):
|
|
"""This returns a number, n constrained to the min and max bounds. """
|
|
|
|
if n < min:
|
|
return min
|
|
if n > max:
|
|
return max
|
|
return n
|
|
|
|
|
|
class screen:
|
|
|
|
"""This object maintains the state of a virtual text screen as a
|
|
rectangluar array. This maintains a virtual cursor position and handles
|
|
scrolling as characters are added. This supports most of the methods needed
|
|
by an ANSI text screen. Row and column indexes are 1-based (not zero-based,
|
|
like arrays). """
|
|
|
|
def __init__(self, r=24, c=80):
|
|
"""This initializes a blank scree of the given dimentions."""
|
|
|
|
self.rows = r
|
|
self.cols = c
|
|
self.cur_r = 1
|
|
self.cur_c = 1
|
|
self.cur_saved_r = 1
|
|
self.cur_saved_c = 1
|
|
self.scroll_row_start = 1
|
|
self.scroll_row_end = self.rows
|
|
self.w = [[SPACE] * self.cols for c in range(self.rows)]
|
|
|
|
def __str__(self):
|
|
"""This returns a printable representation of the screen. The end of
|
|
each screen line is terminated by a newline. """
|
|
|
|
return '\n'.join([''.join(c) for c in self.w])
|
|
|
|
def dump(self):
|
|
"""This returns a copy of the screen as a string. This is similar to
|
|
__str__ except that lines are not terminated with line feeds. """
|
|
|
|
return ''.join([''.join(c) for c in self.w])
|
|
|
|
def pretty(self):
|
|
"""This returns a copy of the screen as a string with an ASCII text box
|
|
around the screen border. This is similar to __str__ except that it
|
|
adds a box. """
|
|
|
|
top_bot = '+' + '-' * self.cols + '+\n'
|
|
return top_bot + \
|
|
'\n'.join(['|' + line + '|' for line in str(self).split('\n')]) + '\n' + top_bot
|
|
|
|
def fill(self, ch=SPACE):
|
|
|
|
self.fill_region(1, 1, self.rows, self.cols, ch)
|
|
|
|
def fill_region(self, rs, cs, re, ce, ch=SPACE):
|
|
|
|
rs = constrain(rs, 1, self.rows)
|
|
re = constrain(re, 1, self.rows)
|
|
cs = constrain(cs, 1, self.cols)
|
|
ce = constrain(ce, 1, self.cols)
|
|
if rs > re:
|
|
rs, re = re, rs
|
|
if cs > ce:
|
|
cs, ce = ce, cs
|
|
for r in range(rs, re + 1):
|
|
for c in range(cs, ce + 1):
|
|
self.put_abs(r, c, ch)
|
|
|
|
def cr(self):
|
|
"""This moves the cursor to the beginning (col 1) of the current row.
|
|
"""
|
|
|
|
self.cursor_home(self.cur_r, 1)
|
|
|
|
def lf(self):
|
|
"""This moves the cursor down with scrolling.
|
|
"""
|
|
|
|
old_r = self.cur_r
|
|
self.cursor_down()
|
|
if old_r == self.cur_r:
|
|
self.scroll_up()
|
|
self.erase_line()
|
|
|
|
def crlf(self):
|
|
"""This advances the cursor with CRLF properties.
|
|
The cursor will line wrap and the screen may scroll.
|
|
"""
|
|
|
|
self.cr()
|
|
self.lf()
|
|
|
|
def newline(self):
|
|
"""This is an alias for crlf().
|
|
"""
|
|
|
|
self.crlf()
|
|
|
|
def put_abs(self, r, c, ch):
|
|
"""Screen array starts at 1 index."""
|
|
|
|
r = constrain(r, 1, self.rows)
|
|
c = constrain(c, 1, self.cols)
|
|
ch = str(ch)[0]
|
|
self.w[r - 1][c - 1] = ch
|
|
|
|
def put(self, ch):
|
|
"""This puts a characters at the current cursor position.
|
|
"""
|
|
|
|
self.put_abs(self.cur_r, self.cur_c, ch)
|
|
|
|
def insert_abs(self, r, c, ch):
|
|
"""This inserts a character at (r,c). Everything under
|
|
and to the right is shifted right one character.
|
|
The last character of the line is lost.
|
|
"""
|
|
|
|
r = constrain(r, 1, self.rows)
|
|
c = constrain(c, 1, self.cols)
|
|
for ci in range(self.cols, c, -1):
|
|
self.put_abs(r, ci, self.get_abs(r, ci - 1))
|
|
self.put_abs(r, c, ch)
|
|
|
|
def insert(self, ch):
|
|
|
|
self.insert_abs(self.cur_r, self.cur_c, ch)
|
|
|
|
def get_abs(self, r, c):
|
|
|
|
r = constrain(r, 1, self.rows)
|
|
c = constrain(c, 1, self.cols)
|
|
return self.w[r - 1][c - 1]
|
|
|
|
def get(self):
|
|
|
|
self.get_abs(self.cur_r, self.cur_c)
|
|
|
|
def get_region(self, rs, cs, re, ce):
|
|
"""This returns a list of lines representing the region.
|
|
"""
|
|
|
|
rs = constrain(rs, 1, self.rows)
|
|
re = constrain(re, 1, self.rows)
|
|
cs = constrain(cs, 1, self.cols)
|
|
ce = constrain(ce, 1, self.cols)
|
|
if rs > re:
|
|
rs, re = re, rs
|
|
if cs > ce:
|
|
cs, ce = ce, cs
|
|
sc = []
|
|
for r in range(rs, re + 1):
|
|
line = ''
|
|
for c in range(cs, ce + 1):
|
|
ch = self.get_abs(r, c)
|
|
line = line + ch
|
|
sc.append(line)
|
|
return sc
|
|
|
|
def cursor_constrain(self):
|
|
"""This keeps the cursor within the screen area.
|
|
"""
|
|
|
|
self.cur_r = constrain(self.cur_r, 1, self.rows)
|
|
self.cur_c = constrain(self.cur_c, 1, self.cols)
|
|
|
|
def cursor_home(self, r=1, c=1): # <ESC>[{ROW};{COLUMN}H
|
|
|
|
self.cur_r = r
|
|
self.cur_c = c
|
|
self.cursor_constrain()
|
|
|
|
def cursor_back(self, count=1): # <ESC>[{COUNT}D (not confused with down)
|
|
|
|
self.cur_c = self.cur_c - count
|
|
self.cursor_constrain()
|
|
|
|
def cursor_down(self, count=1): # <ESC>[{COUNT}B (not confused with back)
|
|
|
|
self.cur_r = self.cur_r + count
|
|
self.cursor_constrain()
|
|
|
|
def cursor_forward(self, count=1): # <ESC>[{COUNT}C
|
|
|
|
self.cur_c = self.cur_c + count
|
|
self.cursor_constrain()
|
|
|
|
def cursor_up(self, count=1): # <ESC>[{COUNT}A
|
|
|
|
self.cur_r = self.cur_r - count
|
|
self.cursor_constrain()
|
|
|
|
def cursor_up_reverse(self): # <ESC> M (called RI -- Reverse Index)
|
|
|
|
old_r = self.cur_r
|
|
self.cursor_up()
|
|
if old_r == self.cur_r:
|
|
self.scroll_up()
|
|
|
|
def cursor_force_position(self, r, c): # <ESC>[{ROW};{COLUMN}f
|
|
"""Identical to Cursor Home."""
|
|
|
|
self.cursor_home(r, c)
|
|
|
|
def cursor_save(self): # <ESC>[s
|
|
"""Save current cursor position."""
|
|
|
|
self.cursor_save_attrs()
|
|
|
|
def cursor_unsave(self): # <ESC>[u
|
|
"""Restores cursor position after a Save Cursor."""
|
|
|
|
self.cursor_restore_attrs()
|
|
|
|
def cursor_save_attrs(self): # <ESC>7
|
|
"""Save current cursor position."""
|
|
|
|
self.cur_saved_r = self.cur_r
|
|
self.cur_saved_c = self.cur_c
|
|
|
|
def cursor_restore_attrs(self): # <ESC>8
|
|
"""Restores cursor position after a Save Cursor."""
|
|
|
|
self.cursor_home(self.cur_saved_r, self.cur_saved_c)
|
|
|
|
def scroll_constrain(self):
|
|
"""This keeps the scroll region within the screen region."""
|
|
|
|
if self.scroll_row_start <= 0:
|
|
self.scroll_row_start = 1
|
|
if self.scroll_row_end > self.rows:
|
|
self.scroll_row_end = self.rows
|
|
|
|
def scroll_screen(self): # <ESC>[r
|
|
"""Enable scrolling for entire display."""
|
|
|
|
self.scroll_row_start = 1
|
|
self.scroll_row_end = self.rows
|
|
|
|
def scroll_screen_rows(self, rs, re): # <ESC>[{start};{end}r
|
|
"""Enable scrolling from row {start} to row {end}."""
|
|
|
|
self.scroll_row_start = rs
|
|
self.scroll_row_end = re
|
|
self.scroll_constrain()
|
|
|
|
def scroll_down(self): # <ESC>D
|
|
"""Scroll display down one line."""
|
|
|
|
# Screen is indexed from 1, but arrays are indexed from 0.
|
|
s = self.scroll_row_start - 1
|
|
e = self.scroll_row_end - 1
|
|
self.w[s + 1:e + 1] = copy.deepcopy(self.w[s:e])
|
|
|
|
def scroll_up(self): # <ESC>M
|
|
"""Scroll display up one line."""
|
|
|
|
# Screen is indexed from 1, but arrays are indexed from 0.
|
|
s = self.scroll_row_start - 1
|
|
e = self.scroll_row_end - 1
|
|
self.w[s:e] = copy.deepcopy(self.w[s + 1:e + 1])
|
|
|
|
def erase_end_of_line(self): # <ESC>[0K -or- <ESC>[K
|
|
"""Erases from the current cursor position to the end of the current
|
|
line."""
|
|
|
|
self.fill_region(self.cur_r, self.cur_c, self.cur_r, self.cols)
|
|
|
|
def erase_start_of_line(self): # <ESC>[1K
|
|
"""Erases from the current cursor position to the start of the current
|
|
line."""
|
|
|
|
self.fill_region(self.cur_r, 1, self.cur_r, self.cur_c)
|
|
|
|
def erase_line(self): # <ESC>[2K
|
|
"""Erases the entire current line."""
|
|
|
|
self.fill_region(self.cur_r, 1, self.cur_r, self.cols)
|
|
|
|
def erase_down(self): # <ESC>[0J -or- <ESC>[J
|
|
"""Erases the screen from the current line down to the bottom of the
|
|
screen."""
|
|
|
|
self.erase_end_of_line()
|
|
self.fill_region(self.cur_r + 1, 1, self.rows, self.cols)
|
|
|
|
def erase_up(self): # <ESC>[1J
|
|
"""Erases the screen from the current line up to the top of the
|
|
screen."""
|
|
|
|
self.erase_start_of_line()
|
|
self.fill_region(self.cur_r - 1, 1, 1, self.cols)
|
|
|
|
def erase_screen(self): # <ESC>[2J
|
|
"""Erases the screen with the background color."""
|
|
|
|
self.fill()
|
|
|
|
def set_tab(self): # <ESC>H
|
|
"""Sets a tab at the current position."""
|
|
|
|
pass
|
|
|
|
def clear_tab(self): # <ESC>[g
|
|
"""Clears tab at the current position."""
|
|
|
|
pass
|
|
|
|
def clear_all_tabs(self): # <ESC>[3g
|
|
"""Clears all tabs."""
|
|
|
|
pass
|
|
|
|
# Insert line Esc [ Pn L
|
|
# Delete line Esc [ Pn M
|
|
# Delete character Esc [ Pn P
|
|
# Scrolling region Esc [ Pn(top);Pn(bot) r
|