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pye_core.py
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pye_core.py
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##
## Small python text editor based on the
## Very simple VT100 terminal text editor widget
## Copyright (c) 2015 Paul Sokolovsky (initial code)
## Copyright (c) 2015-2021 Robert Hammelrath (additional code)
## Distributed under MIT License
## Changes:
## - Ported the code to boards from micropython.org, Pycom Boards,
## sipeed boards, Adafruit Circuitpython boards (still runs on Linux or Darwin)
## - changed read keyboard function to comply with char-by-char input
## - added support for TAB, BACKTAB, SAVE, DEL and Backspace joining lines,
## Find, Replace, Goto Line, UNDO, REDO, GET file, Auto-Indent, Set Flags,
## Copy/Cut & Paste, Indent, Dedent, line and character move
## - Basic mouse support for pointing, scrolling and selecting
## - handling tab (0x09) on reading & writing files,
## - Added a status line and single line prompts for
## Quit, Save, Find, Replace, Flags and Goto
## - moved main into a function with some optional parameters
## - Added multi-file support
##
PYE_VERSION = " V2.78 "
try:
import usys as sys
except:
import sys
import gc
if sys.implementation.name == "micropython":
is_micropython = True
import uos as os
from uio import StringIO
elif sys.implementation.name == "circuitpython":
is_micropython = True
import os
from io import StringIO
else:
is_micropython = False
def const(x):
return x
# const = lambda x:x
import os
from _io import StringIO
from re import compile as re_compile
import time
KEY_NONE = const(0x00)
KEY_UP = const(0x0B)
KEY_DOWN = const(0x0D)
KEY_LEFT = const(0x1F)
KEY_RIGHT = const(0x1E)
KEY_HOME = const(0x10)
KEY_END = const(0x03)
KEY_PGUP = const(0xFFF1)
KEY_PGDN = const(0xFFF2)
KEY_WORD_LEFT = const(0xFFF3)
KEY_WORD_RIGHT = const(0xFFF4)
KEY_SHIFT_UP = const(0xFFF5)
KEY_ALT_UP = const(0xFFEA)
KEY_SHIFT_DOWN = const(0xFFF6)
KEY_ALT_DOWN = const(0xFFEB)
KEY_SHIFT_LEFT = const(0xFFF0)
KEY_ALT_LEFT = const(0xFFE9)
KEY_SHIFT_CTRL_LEFT = const(0xFFED)
KEY_SHIFT_RIGHT = const(0xFFEF)
KEY_ALT_RIGHT = const(0xFFE8)
KEY_SHIFT_CTRL_RIGHT = const(0xFFEC)
KEY_QUIT = const(0x11)
KEY_FORCE_QUIT = const(0xFFE6)
KEY_ENTER = const(0x0A)
KEY_BACKSPACE = const(0x08)
KEY_DELETE = const(0x7F)
KEY_DEL_WORD = const(0xFFF7)
KEY_DEL_LINE = const(0xFFE7)
KEY_WRITE = const(0x13)
KEY_TAB = const(0x09)
KEY_BACKTAB = const(0x15)
KEY_FIND = const(0x06)
KEY_GOTO = const(0x07)
KEY_MOUSE = const(0x1B)
KEY_SCRLUP = const(0x1C)
KEY_SCRLDN = const(0x1D)
KEY_FIND_AGAIN = const(0x0E)
KEY_REDRAW = const(0x05)
KEY_UNDO = const(0x1A)
KEY_REDO = const(0xFFEE)
KEY_CUT = const(0x18)
KEY_PASTE = const(0x16)
KEY_COPY = const(0x04)
KEY_FIRST = const(0x14)
KEY_LAST = const(0x02)
KEY_REPLC = const(0x12)
KEY_TOGGLE = const(0x01)
KEY_GET = const(0x0F)
KEY_MARK = const(0x0C)
KEY_NEXT = const(0x17)
KEY_PREV = const(0xFFE5)
KEY_COMMENT = const(0xFFFC)
KEY_MATCH = const(0xFFFD)
KEY_INDENT = const(0xFFFE)
KEY_DEDENT = const(0xFFFF)
KEY_PLACE = const(0xFFE4)
KEY_NEXT_PLACE = const(0xFFE3)
KEY_PREV_PLACE = const(0xFFE2)
KEY_UNDO_PREV = const(0xFFE1)
KEY_UNDO_NEXT = const(0xFFE0)
KEY_UNDO_YANK = const(0xFFDF)
class Editor:
KEYMAP = { ## Gets lengthy
"\x1b[A": KEY_UP,
"\x1b[1;2A": KEY_SHIFT_UP,
"\x1b[1;3A": KEY_ALT_UP,
"\x1b[B": KEY_DOWN,
"\x1b[1;2B": KEY_SHIFT_DOWN,
"\x1b[1;3B": KEY_ALT_DOWN,
"\x1b[D": KEY_LEFT,
"\x1b[1;2D": KEY_SHIFT_LEFT,
"\x1b[1;6D": KEY_SHIFT_CTRL_LEFT,
"\x1b[1;3D": KEY_ALT_LEFT,
"\x1b[C": KEY_RIGHT,
"\x1b[1;2C": KEY_SHIFT_RIGHT,
"\x1b[1;6C": KEY_SHIFT_CTRL_RIGHT,
"\x1b[1;3C": KEY_ALT_RIGHT,
"\x1b[H": KEY_HOME, ## in Linux Terminal
"\x1bOH": KEY_HOME, ## Picocom, Minicom
"\x1b[1~": KEY_HOME, ## Putty
"\x1b[F": KEY_END, ## Linux Terminal
"\x1bOF": KEY_END, ## Picocom, Minicom
"\x1b[4~": KEY_END, ## Putty
"\x1b[5~": KEY_PGUP,
"\x1b[6~": KEY_PGDN,
"\x1b[5;5~": KEY_PREV, ## Ctrl-PgUp
"\x1b[6;5~": KEY_NEXT, ## Ctr-PgDn
"\x1b[1;5D": KEY_WORD_LEFT,
"\x1b[1;5C": KEY_WORD_RIGHT,
"\x03": KEY_COPY, ## Ctrl-C
"\r": KEY_ENTER,
"\x7f": KEY_BACKSPACE, ## Ctrl-? (127)
"\x1b[3~": KEY_DELETE,
"\x1b[Z": KEY_BACKTAB, ## Shift Tab
"\x19": KEY_REDO, ## Ctrl-Y
"\x08": KEY_REPLC, ## Ctrl-H
"\x12": KEY_REPLC, ## Ctrl-R
"\x11": KEY_QUIT, ## Ctrl-Q
"\x1b": KEY_QUIT, ## Escape twice
"\n": KEY_ENTER,
"\x13": KEY_WRITE, ## Ctrl-S
"\x06": KEY_FIND, ## Ctrl-F
"\x0e": KEY_FIND_AGAIN, ## Ctrl-N
"\x07": KEY_GOTO, ## Ctrl-G
"\x05": KEY_REDRAW, ## Ctrl-E
"\x1a": KEY_UNDO, ## Ctrl-Z
"\x09": KEY_TAB,
"\x15": KEY_BACKTAB, ## Ctrl-U
"\x18": KEY_CUT, ## Ctrl-X
"\x16": KEY_PASTE, ## Ctrl-V
"\x04": KEY_UNDO_YANK, ## Ctrl-D
"\x0c": KEY_MARK, ## Ctrl-L
"\x00": KEY_MARK, ## Ctrl-Space
"\x14": KEY_FIRST, ## Ctrl-T
"\x02": KEY_LAST, ## Ctrl-B
"\x01": KEY_TOGGLE, ## Ctrl-A
"\x17": KEY_NEXT, ## Ctrl-W
"\x0f": KEY_GET, ## Ctrl-O
"\x10": KEY_COMMENT, ## Ctrl-P
"\x1f": KEY_COMMENT, ## Ctrl-P
## other keys
"\x1b[1;5A": KEY_SCRLUP, ## Ctrl-Up
"\x1b[1;5B": KEY_SCRLDN, ## Ctrl-Down
"\x1b[1;5H": KEY_FIRST, ## Ctrl-Home
"\x1b[1;5F": KEY_LAST, ## Ctrl-End
"\x1b[3;5~": KEY_DEL_WORD, ## Ctrl-Del
"\x1b[3;2~": KEY_DEL_LINE, ## Shift-Del
"\x0b": KEY_MATCH, ## Ctrl-K
"\x1b[M": KEY_MOUSE,
"\x1b[2;3~": KEY_PLACE, ## Alt-Ins
"\x1b[5;3~": KEY_PREV_PLACE, ## Alt-PgUp
"\x1b[6;3~": KEY_NEXT_PLACE, ## Alt-PgDn
"\x1b[1;3H": KEY_UNDO_PREV, ## Alt-Home
"\x1b[1;3F": KEY_UNDO_NEXT, ## Alt-End
}
TERMCMD = [ ## list of terminal control strings
"\x1b[{row};{col}H", ## 0: Set cursor
"\x1b[0K", ## 1: Clear EOL
"\x1b[?25h", ## 2: Cursor ON
"\x1b[?25l", ## 3: Cursor OFF
"\x1b[0m", ## 4: Hilite 0 - normal text
"\x1b[1;37;44m", ## 5: Hilite 1 - Entering the status line
"\x1b[43m", ## 6: Hilite 2 - Highligthing Text
"\x1b[?9h", ## 7: Mouse reporting on
"\x1b[?9l", ## 8: Mouse reporting off
"\x1bM", ## 9: Scroll one line up
"\n", ## 10: Scroll one line down
"\x1b[1;{stop}r", ## 11: Set lowest line of scrolling range
"\x1b[r", ## 12: Scroll the full screen
"\b", ## 13: backspace one character, used in line_edit
## 14: Long status line format string.
"{chd}{file} Row: {row}/{total} Col: {col} {msg}",
## 15: Shorter status line format string.
"{chd}{file} {row}:{col} {msg}",
]
## symbols that are shared between instances of Editor
yank_buffer = []
find_pattern = ""
case = "n"
autoindent = "y"
replc_pattern = ""
comment_char = "\x23 " ## for #
word_char = "_\\" ## additional characters in a word
file_char = "_.-" # additional characters in a file name
match_span = 50 ## number of lines to search for a bracket match
place_list = [] ##
place_index = 0
max_places = 20
def __init__(self, tab_size, undo_limit, io_device):
self.top_line = self.cur_line = self.row = self.vcol = self.col = self.margin = 0
self.tab_size = tab_size
self.changed = ""
self.hash = 0
self.message = self.fname = ""
self.content = [""]
self.undo = []
self.undo_limit = undo_limit
self.undo_index = 0
self.redo = []
self.clear_mark()
self.write_tabs = "n"
self.work_dir = os.getcwd()
self.io_device = io_device
self.wr = io_device.wr
self.is_dir = False
self.key_max = 0
for _ in Editor.KEYMAP.keys():
self.key_max = max(self.key_max, len(_))
def goto(self, row, col):
self.wr(Editor.TERMCMD[0].format(row=row + 1, col=col + 1))
def clear_to_eol(self):
self.wr(Editor.TERMCMD[1])
def cursor(self, onoff):
self.wr(Editor.TERMCMD[2] if onoff else Editor.TERMCMD[3])
def hilite(self, mode):
if mode == 1: ## used for the status line
self.wr(Editor.TERMCMD[5])
elif mode == 2: ## used for the marked area
self.wr(Editor.TERMCMD[6])
else: ## plain text
self.wr(Editor.TERMCMD[4])
def mouse_reporting(self, onoff):
self.wr(
Editor.TERMCMD[7] if onoff else Editor.TERMCMD[8]
) ## enable/disable mouse reporting
def scroll_region(self, stop):
self.wr(
Editor.TERMCMD[11].format(stop=stop) if stop else Editor.TERMCMD[12]
) ## set scrolling range
def scroll_up(self, scrolling):
if Editor.TERMCMD[9]:
Editor.scrbuf[scrolling:] = Editor.scrbuf[:-scrolling]
Editor.scrbuf[:scrolling] = [""] * scrolling
self.goto(0, 0)
self.wr(Editor.TERMCMD[9] * scrolling)
def scroll_down(self, scrolling):
if Editor.TERMCMD[10]:
Editor.scrbuf[:-scrolling] = Editor.scrbuf[scrolling:]
Editor.scrbuf[-scrolling:] = [""] * scrolling
self.goto(Editor.height - 1, 0)
self.wr(Editor.TERMCMD[10] * scrolling)
def redraw(self, flag):
self.cursor(False)
Editor.height, Editor.width = self.io_device.get_screen_size()
Editor.height -= 1
Editor.scrbuf = [(False, "\x00")] * Editor.height ## force delete
self.row = min(Editor.height - 1, self.row)
self.scroll_region(Editor.height)
self.mouse_reporting(True) ## enable mouse reporting
if flag:
self.message = PYE_VERSION
if is_micropython:
gc.collect()
if flag:
self.message += "{} Bytes Memory available".format(gc.mem_free())
self.changed = "" if self.hash == self.hash_buffer() else "*"
def get_input(
self,
): ## read from interface/keyboard one byte each and match against function keys
while True:
in_buffer = self.io_device.rd()
if in_buffer[0] == "\x1b": ## starting with ESC, must be fct
while True:
in_buffer += self.io_device.rd()
c = in_buffer[-1]
if c == "~" or (c.isalpha() and len(in_buffer) > 2):
break
## map alt-chr aka ESC-char onto ctrl-chr, except for ESC-O
if len(in_buffer) == 2 and c.isalpha() and c != "O":
in_buffer = chr(ord(in_buffer[1]) & 0x1F)
break
## stop if sequence cannot be found
if len(in_buffer) >= self.key_max:
break
## escape entered twice: escape!
if in_buffer == "\x1b\x1b":
in_buffer = "\x1b"
break
if in_buffer in Editor.KEYMAP:
c = Editor.KEYMAP[in_buffer]
if c != KEY_MOUSE:
return c, None
else: ## special for mice
mouse_fct = ord(self.io_device.rd_raw()) ## read 3 more chars
mouse_x = ord(self.io_device.rd_raw()) - 33
mouse_y = ord(self.io_device.rd_raw()) - 33
if mouse_fct == 0x61:
return KEY_SCRLDN, 3
elif mouse_fct == 0x60:
return KEY_SCRLUP, 3
else:
return KEY_MOUSE, [mouse_x, mouse_y, mouse_fct] ## set the cursor
elif ord(in_buffer[0]) >= 32:
return KEY_NONE, in_buffer
def display_window(self): ## Update window and status line
## Force cur_line and col to be in the reasonable bounds
self.cur_line = min(self.total_lines - 1, max(self.cur_line, 0))
self.vcol = max(0, min(self.col, len(self.content[self.cur_line])))
## Check if Column is out of view, and align margin if needed
if self.vcol >= Editor.width + self.margin:
self.margin = self.vcol - Editor.width + (Editor.width >> 2)
elif self.vcol < self.margin:
self.margin = max(self.vcol - (Editor.width >> 2), 0)
## if cur_line is out of view, align top_line to the given row
if not (self.top_line <= self.cur_line < self.top_line + Editor.height): # Visible?
self.top_line = max(self.cur_line - self.row, 0)
## in any case, align row to top_line and cur_line
self.row = self.cur_line - self.top_line
## update_screen
self.cursor(False)
line = self.top_line
if self.mark is None:
flag = 0
else:
start_line, start_col, end_line, end_col = self.mark_range()
start_col = max(start_col - self.margin, 0)
end_col = max(end_col - self.margin, 0)
for c in range(Editor.height):
if line == self.total_lines: ## at empty bottom screen part
if Editor.scrbuf[c] != (False, ""):
self.goto(c, 0)
self.clear_to_eol()
Editor.scrbuf[c] = (False, "")
else:
if self.mark is not None:
flag = (
(start_line <= line < end_line)
+ ((start_line == line) << 1)
+ (((end_line - 1) == line) << 2)
)
l = (flag, self.content[line][self.margin : self.margin + Editor.width])
if (flag and line == self.cur_line) or l != Editor.scrbuf[
c
]: ## line changed, print it
self.goto(c, 0)
if flag == 0: # no mark
self.wr(l[1])
elif flag == 7: # only line of a mark
self.wr(l[1][:start_col])
self.hilite(2)
self.wr(l[1][start_col:end_col])
self.hilite(0)
self.wr(l[1][end_col:])
elif flag == 3: # first line of mark
self.wr(l[1][:start_col])
self.hilite(2)
self.wr(l[1][start_col:])
self.wr(" ")
self.hilite(0)
elif flag == 5: # last line of mark
self.hilite(2)
self.wr(l[1][:end_col])
self.hilite(0)
self.wr(l[1][end_col:])
else: # middle line of a mark
self.hilite(2)
self.wr(l[1])
self.wr(" ")
self.hilite(0)
if len(l[1]) < Editor.width:
self.clear_to_eol()
Editor.scrbuf[c] = l
line += 1
## display Status-Line
self.goto(Editor.height, 0)
self.hilite(1)
self.wr(
Editor.TERMCMD[14 if Editor.width > 40 else 15].format(
chd=self.changed,
file=self.fname,
row=self.cur_line + 1,
total=self.total_lines,
col=self.vcol + 1,
msg=self.message,
)[: self.width - 1]
)
self.clear_to_eol() ## once moved up for mate/xfce4-terminal issue with scroll region
self.hilite(0)
self.goto(self.row, self.vcol - self.margin)
self.cursor(True)
def spaces(self, line, pos=None): ## count spaces
return (
len(line) - len(line.lstrip(" "))
if pos is None
else len(line[:pos]) - len(line[:pos].rstrip(" ")) ## at line start
)
def mark_range(self):
if self.mark_order(self.cur_line, self.col) >= 0:
return (self.mark[0], self.mark[1], self.cur_line + 1, self.col)
else:
return (self.cur_line, self.col, self.mark[0] + 1, self.mark[1])
def mark_order(self, line, col):
return col - self.mark[1] if self.mark[0] == line else line - self.mark[0]
def line_range(self):
res = self.mark_range()
return (res[0], res[2]) if res[3] > 0 else (res[0], res[2] - 1)
def line_edit(
self, prompt, default, zap=None
): ## better one: added cursor keys and backsp, delete
def push_msg(msg):
self.wr(msg + Editor.TERMCMD[13] * len(msg)) ## Write a message and move cursor back
self.goto(Editor.height, 0)
self.hilite(1)
self.wr(prompt)
self.wr(default)
self.clear_to_eol()
res = default
pos = len(res)
del_all = True
mouse_last = None
while True:
key, char = self.get_input() ## Get Char of Fct.
if key == KEY_NONE: ## char to be inserted
if len(prompt) + len(res) < self.width - 2:
res = res[:pos] + char + res[pos:]
self.wr(res[pos])
pos += len(char)
push_msg(res[pos:]) ## update tail
elif key in (KEY_ENTER, KEY_TAB): ## Finis
self.hilite(0)
return res
elif key in (KEY_QUIT, KEY_COPY): ## Abort
self.hilite(0)
return None
elif key == KEY_LEFT:
if pos > 0:
self.wr(Editor.TERMCMD[13])
pos -= 1
elif key == KEY_RIGHT:
if pos < len(res):
self.wr(res[pos])
pos += 1
elif key == KEY_HOME:
self.wr(Editor.TERMCMD[13] * pos)
pos = 0
elif key == KEY_END:
self.wr(res[pos:])
pos = len(res)
elif key == KEY_DELETE: ## Delete
if del_all:
self.wr(Editor.TERMCMD[13] * pos)
self.wr(" " * len(res))
self.wr(Editor.TERMCMD[13] * len(res))
pos = 0
res = ""
else:
if pos < len(res):
res = res[:pos] + res[pos + 1 :]
push_msg(res[pos:] + " ") ## update tail
elif key == KEY_BACKSPACE: ## Backspace
if pos > 0:
res = res[: pos - 1] + res[pos:]
self.wr(Editor.TERMCMD[13])
pos -= 1
push_msg(res[pos:] + " ") ## update tail
elif key == KEY_PASTE: ## Get from content
res += self.getsymbol(self.content[self.cur_line], self.col, zap)[
: Editor.width - pos - len(prompt) - 1
]
push_msg(res[pos:])
elif key == KEY_MOUSE:
if char[1] < Editor.height and (char[1] + self.top_line) < self.total_lines:
self.col = char[0] + self.margin
self.cur_line = char[1] + self.top_line
if (self.col, self.cur_line) != mouse_last: ## first click: copy
mouse_last = (self.col, self.cur_line)
self.wr(Editor.TERMCMD[13] * pos)
self.wr(" " * len(res))
self.wr(Editor.TERMCMD[13] * len(res))
pos = 0
res = self.getsymbol(self.content[self.cur_line], self.col, zap)
push_msg(res)
else: ## second click: Go
self.hilite(0)
return res
del_all = False
def getsymbol(self, s, pos, zap):
if pos < len(s) and zap is not None:
start = self.skip_while(s, pos, zap, -1)
stop = self.skip_while(s, pos, zap, 1)
return s[start + 1 : stop]
else:
return ""
def issymbol(self, c, zap):
return c.isalpha() or c.isdigit() or c in zap
def skip_until(self, s, pos, zap, way):
stop = -1 if way < 0 else len(s)
while pos != stop and not self.issymbol(s[pos], zap):
pos += way
return pos
def skip_while(self, s, pos, zap, way):
stop = -1 if way < 0 else len(s)
while pos != stop and self.issymbol(s[pos], zap):
pos += way
return pos
def move_up(self):
if self.cur_line > 0:
self.cur_line -= 1
if self.cur_line < self.top_line:
self.scroll_up(1)
def skip_up(self):
if self.col == 0 and self.cur_line > 0:
self.col = len(self.content[self.cur_line - 1])
self.move_up()
return True
else:
return False
def move_left(self):
self.col = self.vcol
if not self.skip_up():
self.col -= 1
def move_down(self):
if self.cur_line < self.total_lines - 1:
self.cur_line += 1
if self.cur_line == self.top_line + Editor.height:
self.scroll_down(1)
def skip_down(self, l):
if self.col >= len(l) and self.cur_line < self.total_lines - 1:
self.col = 0
self.move_down()
return True
else:
return False
def move_right(self, l):
if not self.skip_down(l):
self.col += 1
## This is the regex version of find.
def find_in_file(self, pattern, col, end):
Editor.find_pattern = pattern ## remember it
if Editor.case != "y":
pattern = pattern.lower()
try:
rex = re_compile(pattern)
except:
self.message = "Invalid pattern: " + pattern
return None
start = self.cur_line
if col > len(self.content[start]) or ( # After EOL
pattern[0] == "^" and col != 0
): # or anchored and not at BOL
start, col = start + 1, 0 # Skip to the next line
for line in range(start, end):
l = self.content[line][col:]
if Editor.case != "y":
l = l.lower()
match = rex.search(l)
if match: # Bingo
self.cur_line = line
## Instead of match.span, a simple find has to be performed
## to get the cursor position.
## And '$' has to be treated separately, so look for a true EOL match first
if pattern[-1:] == "$" and match.group(0)[-1:] != "$":
self.col = col + len(l) - len(match.group(0))
else:
self.col = col + l.find(match.group(0))
return len(match.group(0))
col = 0
else:
self.message = Editor.find_pattern + " not found (again)"
return None
def undo_add(self, lnum, text, key, span=1, chain=False):
if (
len(self.undo) == 0
or key == KEY_NONE
or self.undo[-1][3] != key
or self.undo[-1][0] != lnum
):
self.changed = "*"
if len(self.undo) >= self.undo_limit: ## drop oldest undo(s), if full
del self.undo[0]
self.undo.append([lnum, span, text, key, self.col, chain])
self.redo = [] ## clear re-do list.
def undo_redo(self, undo, redo):
chain = True
redo_start = len(redo)
while len(undo) > 0 and chain:
action = undo.pop() ## get action from stack
if action[3] not in (KEY_INDENT, KEY_DEDENT, KEY_COMMENT):
self.cur_line = action[0] ## wrong for Bkspc of BOL
self.col = action[4]
if len(redo) >= self.undo_limit: ## mybe not enough
del redo[0]
if action[1] >= 0: ## insert or replace line
redo.append(
action[0:1]
+ [len(action[2])]
+ [self.content[action[0] : action[0] + action[1]]] ## safe to redo stack
+ action[3:]
)
if action[0] < self.total_lines:
self.content[action[0] : action[0] + action[1]] = action[2] # insert lines
else:
self.content += action[2]
else: ## delete lines, restore the current line
redo.append(
action[0:1]
+ [1]
+ [ ## undo deletes, redo inserts
self.content[action[0] : action[0] - action[1] + 1]
]
+ action[3:]
)
del self.content[action[0] : action[0] - action[1]]
self.content[action[0]] = action[2][0] # replace current line with save content
chain = action[5]
if (len(redo) - redo_start) > 0: ## Performed at least one action
redo[-1][5] = True ## fix the chaining flags for reversed action order.
redo[redo_start][5] = False
self.total_lines = len(self.content) ## Reset the length and change indicator
self.changed = "" if self.hash == self.hash_buffer() else "*"
self.clear_mark()
def set_mark(self, flag=999999999): ## start the highlighting if not done yet
if self.mark is None:
self.mark = (self.cur_line, self.col)
if self.mark_flag < flag:
self.mark_flag = flag
def check_mark(self): ## Check whether to auto-unmark
if self.mark is not None:
self.mark_flag -= 1
if self.mark_flag <= 0:
self.clear_mark()
def clear_mark(self):
self.mark = None
self.mark_flag = 0
self.mouse_last = (0, 0, 0)
def yank_mark(self): # Copy marked area to the yank buffer
start_row, start_col, end_row, end_col = self.mark_range()
## copy first the whole area
Editor.yank_buffer = self.content[start_row:end_row]
## then remove parts that do not have to be copied. Last line first
Editor.yank_buffer[-1] = Editor.yank_buffer[-1][:end_col]
Editor.yank_buffer[0] = Editor.yank_buffer[0][start_col:]
def delete_mark(self, yank): ## copy marked lines (opt) and delete them
if yank:
self.yank_mark()
## delete by composing fractional lines into the first one and erase remaining lines
start_row, start_col, end_row, end_col = self.mark_range()
self.undo_add(start_row, self.content[start_row:end_row], KEY_NONE, 1, False)
self.content[start_row] = (
self.content[start_row][:start_col] + self.content[end_row - 1][end_col:]
)
if start_row + 1 < end_row:
del self.content[start_row + 1 : end_row] ## delete the remaining area
self.col = start_col
if self.content == []: ## if all was wiped
self.content = [""] ## add a line
self.undo[-1][1] = 1 ## tell undo to overwrite this single line
self.total_lines = len(self.content)
self.cur_line = start_row
self.clear_mark() ## unset line mark
def handle_edit_keys(self, key, char): ## keys which change content
l = self.content[self.cur_line]
if key == KEY_NONE: ## character to be added
self.col = self.vcol
if self.mark is not None:
self.delete_mark(False)
l = self.content[self.cur_line]
chain = True
else:
chain = False
self.undo_add(self.cur_line, [l], 0x20 if char == " " else 0x41, 1, chain)
self.content[self.cur_line] = l[: self.col] + char + l[self.col :]
self.col += len(char)
return key ## return here for a marginally faster paste
elif key == KEY_SHIFT_CTRL_LEFT:
self.set_mark()
key = KEY_WORD_LEFT
elif key == KEY_SHIFT_CTRL_RIGHT:
self.set_mark()
key = KEY_WORD_RIGHT
elif key == KEY_MOUSE: ## Set Cursor or open file/find
if char[2] == 0x22: ## right click opens find or get
key = KEY_GET if self.is_dir else KEY_FIND
elif char[1] < Editor.height:
col = char[0] + self.margin
line = char[1] + self.top_line
if (col, line) == self.mouse_last[:2] and (time.time() - self.mouse_last[2]) < 2:
self.mouse_last = (0, 0, 0)
if (
self.mark is None
and col < len(l)
and self.issymbol(l[col], Editor.word_char)
):
self.col = self.skip_while(l, col, Editor.word_char, -1) + 1
self.set_mark()
self.col = self.skip_while(l, self.col, Editor.word_char, 1)
else: ## toggle single char mark
key = KEY_MARK
else:
if self.mark is not None:
if (
self.mark_order(self.cur_line, self.col) * self.mark_order(line, col)
< 0
):
self.mark = self.cur_line, self.col
self.cur_line, self.col = line, col
self.mouse_last = (col, line, time.time())
## start new if/elif sequence, since the value of key might have changed
if key == KEY_DOWN:
self.move_down()
elif key == KEY_UP:
self.move_up()
elif key == KEY_LEFT:
self.move_left()
elif key == KEY_RIGHT:
self.move_right(l)
elif key == KEY_WORD_LEFT:
self.col = self.vcol
if self.skip_up():
l = self.content[self.cur_line]
pos = self.skip_until(l, self.col - 1, Editor.word_char, -1)
self.col = self.skip_while(l, pos, Editor.word_char, -1) + 1
elif key == KEY_WORD_RIGHT:
if self.skip_down(l):
l = self.content[self.cur_line]
pos = self.skip_until(l, self.col, Editor.word_char, 1)
self.col = self.skip_while(l, pos, Editor.word_char, 1)
elif key == KEY_DELETE:
self.col = self.vcol
if self.mark is not None:
self.delete_mark(False)
elif self.col < len(l):
self.undo_add(self.cur_line, [l], KEY_DELETE)
self.content[self.cur_line] = l[: self.col] + l[self.col + 1 :]
elif (self.cur_line + 1) < self.total_lines: ## test for last line
self.undo_add(self.cur_line, [l, self.content[self.cur_line + 1]], KEY_NONE)
self.content[self.cur_line] = l + (
self.content.pop(self.cur_line + 1).lstrip()
if Editor.autoindent == "y" and self.col > 0
else self.content.pop(self.cur_line + 1)
)
self.total_lines -= 1
elif key == KEY_BACKSPACE:
self.col = self.vcol
if self.mark is not None:
self.delete_mark(False)
elif self.col > 0:
self.undo_add(self.cur_line, [l], KEY_BACKSPACE)
self.content[self.cur_line] = l[: self.col - 1] + l[self.col :]
self.col -= 1
elif self.cur_line > 0: # at the start of a line, but not the first
self.undo_add(self.cur_line - 1, [self.content[self.cur_line - 1], l], KEY_NONE)
self.col = len(self.content[self.cur_line - 1])
self.content[self.cur_line - 1] += self.content.pop(self.cur_line)
self.cur_line -= 1
self.total_lines -= 1
elif key == KEY_DEL_WORD:
if self.col < len(l):
pos = self.skip_while(l, self.col, Editor.word_char, 1)
pos += self.spaces(l[pos:])
if self.col < pos:
self.undo_add(self.cur_line, [l], KEY_DEL_WORD)
self.content[self.cur_line] = l[: self.col] + l[pos:]
elif key == KEY_DEL_LINE:
if self.cur_line < (self.total_lines - 1):
self.undo_add(self.cur_line, [l, self.content[self.cur_line + 1]], KEY_NONE, 1)
else:
self.undo_add(self.cur_line, [l], KEY_NONE, 1)
self.content.pop(self.cur_line)
if self.content == []:
self.content = [""]
elif key == KEY_HOME:
self.col = self.spaces(l) if self.col == 0 else 0
elif key == KEY_END:
ni = len(l.split(Editor.comment_char.strip())[0].rstrip())
ns = self.spaces(l)
self.col = ni if self.col >= len(l) and ni > ns else len(l)
elif key == KEY_PGUP:
self.cur_line -= Editor.height
elif key == KEY_PGDN:
self.cur_line += Editor.height
elif key == KEY_FIND:
pat = self.line_edit("Find: ", Editor.find_pattern, "_")
if pat:
self.clear_mark()
self.find_in_file(pat, self.col + 1, self.total_lines)
self.row = Editor.height >> 1
elif key == KEY_FIND_AGAIN:
if Editor.find_pattern:
self.find_in_file(Editor.find_pattern, self.col + 1, self.total_lines)
self.row = Editor.height >> 1
elif key == KEY_GOTO: ## goto line
line = self.line_edit("Goto Line: ", "")
if line:
self.cur_line = int(line) - 1
self.row = Editor.height >> 1
elif key == KEY_FIRST: ## first line
self.check_mark()
self.cur_line = 0
elif key == KEY_LAST: ## last line
self.check_mark()
self.cur_line = self.total_lines - 1
self.row = Editor.height - 1 ## will be fixed if required
elif key == KEY_TOGGLE: ## Toggle Autoindent/Search case/ Tab Size, TAB write
pat = self.line_edit(
"Autoindent {}, Search Case {}"
", Tabsize {}, Comment {}, Tabwrite {}: ".format(
Editor.autoindent,
Editor.case,
self.tab_size,
Editor.comment_char,
self.write_tabs,
),
"",
)
try:
res = [i.lstrip().lower() for i in pat.split(",")]
if res[0]:
Editor.autoindent = "y" if res[0][0] == "y" else "n"
if res[1]:
Editor.case = "y" if res[1][0] == "y" else "n"
if res[2]:
self.tab_size = int(res[2])
if res[3]:
Editor.comment_char = res[3]
if res[4]:
self.write_tabs = "y" if res[4][0] == "y" else "n"
except IndexError:
pass
elif key == KEY_SCRLUP: ##
ni = 1 if char is None else 3
if self.top_line > 0:
self.top_line = max(self.top_line - ni, 0)
self.cur_line = min(self.cur_line, self.top_line + Editor.height - 1)
self.scroll_up(ni)
elif key == KEY_SCRLDN: ##
ni = 1 if char is None else 3
if self.top_line + Editor.height < self.total_lines:
self.top_line = min(self.top_line + ni, self.total_lines - 1)
self.cur_line = max(self.cur_line, self.top_line)
self.scroll_down(ni)
elif key == KEY_MATCH:
if self.col < len(l): ## ony within text
brackets = "<{[()]}>"
srch = l[self.col]
i = brackets.find(srch)
if i >= 0: ## found a bracket
match = brackets[7 - i] ## matching bracket
level = 0
way = 1 if i < 4 else -1 ## set direction up/down
i = self.cur_line ## set starting point
c = self.col + way ## one off the current position
lstop = (
min(self.total_lines, i + Editor.match_span)
if way > 0
else max(-1, i - Editor.match_span)
)
while i != lstop:
l = self.content[i]
cstop = len(l) if way > 0 else -1
if srch in l or match in l:
while c != cstop:
if l[c] == match:
if level == 0: ## match found
self.cur_line, self.col = i, c
return key ## return here instead of ml-breaking
else:
level -= 1
elif l[c] == srch:
level += 1
c += way
i += way
## set starting point for the next line.
## treatment for the first and last line is implicit.
c = 0 if way > 0 else len(self.content[i]) - 1
self.message = "No match in {} lines".format(abs(lstop - self.cur_line))
elif key == KEY_MARK:
if self.mark is None:
self.set_mark()
self.move_right(l)
else:
self.clear_mark()
elif key == KEY_SHIFT_DOWN:
self.set_mark()
self.move_down()
elif key == KEY_SHIFT_UP:
self.set_mark()
self.move_up()
elif key == KEY_SHIFT_LEFT:
self.set_mark()
self.move_left()
elif key == KEY_SHIFT_RIGHT:
self.set_mark()
self.move_right(l)
elif key == KEY_ALT_LEFT:
if self.col > 0 and self.col < len(l):
self.undo_add(self.cur_line, [l], KEY_ALT_LEFT)
i = self.col
self.content[self.cur_line] = l[: i - 1] + l[i] + l[i - 1] + l[i + 1 :]
self.move_left()
elif key == KEY_ALT_RIGHT:
if self.col < (len(l) - 1):
self.undo_add(self.cur_line, [l], KEY_ALT_RIGHT)
i = self.col
self.content[self.cur_line] = l[:i] + l[i + 1] + l[i] + l[i + 2 :]
self.move_right(l)
elif key == KEY_ALT_UP:
if self.mark is None:
start_line = self.cur_line
end_line = start_line + 1
else:
start_line, end_line = self.line_range()
if start_line > 0:
self.mark = (self.mark[0] - 1, self.mark[1])
if start_line > 0:
self.undo_add(
start_line - 1,
self.content[start_line - 1 : end_line],
KEY_NONE,
end_line - start_line + 1,
)
self.content[start_line - 1 : end_line - 1], self.content[end_line - 1] = (
self.content[start_line:end_line],
self.content[start_line - 1],
)
self.move_up()
elif key == KEY_ALT_DOWN:
if self.mark is None:
start_line = self.cur_line
end_line = start_line + 1
else:
start_line, end_line = self.line_range()
if end_line < self.total_lines:
self.mark = (self.mark[0] + 1, self.mark[1])
## very special case: cursor at the start of the last line
if self.cur_line == end_line == (self.total_lines - 1):
self.move_left()
if end_line < self.total_lines:
self.undo_add(