From e43c532e63659f8f4f7abd38e1213604a8889265 Mon Sep 17 00:00:00 2001 From: Nick Lanham Date: Sun, 27 Feb 2011 17:14:50 +0100 Subject: [PATCH] remove screen.py all functionality has been moved elsewhere at this point --- deluge/ui/console/screen.py | 449 ------------------------------------ 1 file changed, 449 deletions(-) delete mode 100644 deluge/ui/console/screen.py diff --git a/deluge/ui/console/screen.py b/deluge/ui/console/screen.py deleted file mode 100644 index 7ea7cb785..000000000 --- a/deluge/ui/console/screen.py +++ /dev/null @@ -1,449 +0,0 @@ -# -# screen.py -# -# Copyright (C) 2009 Andrew Resch -# -# Deluge is free software. -# -# You may redistribute it and/or modify it under the terms of the -# GNU General Public License, as published by the Free Software -# Foundation; either version 3 of the License, or (at your option) -# any later version. -# -# deluge is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -# See the GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with deluge. If not, write to: -# The Free Software Foundation, Inc., -# 51 Franklin Street, Fifth Floor -# Boston, MA 02110-1301, USA. -# -# In addition, as a special exception, the copyright holders give -# permission to link the code of portions of this program with the OpenSSL -# library. -# You must obey the GNU General Public License in all respects for all of -# the code used other than OpenSSL. If you modify file(s) with this -# exception, you may extend this exception to your version of the file(s), -# but you are not obligated to do so. If you do not wish to do so, delete -# this exception statement from your version. If you delete this exception -# statement from all source files in the program, then also delete it here. -# -# - -import sys -import logging -try: - import curses -except ImportError: - pass - -import colors -try: - import signal - from fcntl import ioctl - import termios - import struct -except: - pass - -from twisted.internet import reactor - -log = logging.getLogger(__name__) - -class CursesStdIO(object): - """fake fd to be registered as a reader with the twisted reactor. - Curses classes needing input should extend this""" - - def fileno(self): - """ We want to select on FD 0 """ - return 0 - - def doRead(self): - """called when input is ready""" - pass - def logPrefix(self): return 'CursesClient' - -LINES_BUFFER_SIZE = 5000 -INPUT_HISTORY_SIZE = 500 - -class Screen(CursesStdIO): - def __init__(self, stdscr, command_parser, tab_completer=None, encoding=None): - """ - A curses screen designed to run as a reader in a twisted reactor. - - :param command_parser: a function that will be passed a string when the - user hits enter - :param tab_completer: a function that is sent the `:prop:input` string when - the user hits tab. It's intended purpose is to modify the input string. - It should return a 2-tuple (input string, input cursor). - - """ - log.debug("Screen init!") - # Function to be called with commands - self.command_parser = command_parser - self.tab_completer = tab_completer - self.stdscr = stdscr - # Make the input calls non-blocking - self.stdscr.nodelay(1) - - # Holds the user input and is cleared on 'enter' - self.input = "" - self.input_incomplete = "" - # Keep track of where the cursor is - self.input_cursor = 0 - # Keep a history of inputs - self.input_history = [] - self.input_history_index = 0 - - # Keep track of double-tabs - self.tab_count = 0 - - # Strings for the 2 status bars - self.topbar = "" - self.bottombar = "" - - # A list of strings to be displayed based on the offset (scroll) - self.lines = [] - # The offset to display lines - self.display_lines_offset = 0 - - # Keep track of the screen size - self.rows, self.cols = self.stdscr.getmaxyx() - try: - signal.signal(signal.SIGWINCH, self.on_resize) - except Exception, e: - log.debug("Unable to catch SIGWINCH signal!") - - if not encoding: - self.encoding = sys.getdefaultencoding() - else: - self.encoding = encoding - - # Do a refresh right away to draw the screen - self.refresh() - - def on_resize(self, *args): - log.debug("on_resize_from_signal") - # Get the new rows and cols value - self.rows, self.cols = struct.unpack("hhhh", ioctl(0, termios.TIOCGWINSZ ,"\000"*8))[0:2] - curses.resizeterm(self.rows, self.cols) - self.refresh() - - def connectionLost(self, reason): - self.close() - - def add_line(self, text, refresh=True): - """ - Add a line to the screen. This will be showed between the two bars. - The text can be formatted with color using the following format: - - "{!fg, bg, attributes, ...!}" - - See: http://docs.python.org/library/curses.html#constants for attributes. - - Alternatively, it can use some built-in scheme for coloring. - See colors.py for built-in schemes. - - "{!scheme!}" - - Examples: - - "{!blue, black, bold!}My Text is {!white, black!}cool" - "{!info!}I am some info text!" - "{!error!}Uh oh!" - - :param text: the text to show - :type text: string - :param refresh: if True, the screen will refresh after the line is added - :type refresh: bool - - """ - - def get_line_chunks(line): - """ - Returns a list of 2-tuples (color string, text) - - """ - chunks = [] - num_chunks = line.count("{!") - for i in range(num_chunks): - # Find the beginning and end of the color tag - beg = line.find("{!") - end = line.find("!}") + 2 - color = line[beg:end] - line = line[end:] - - # Check to see if this is the last chunk - if i + 1 == num_chunks: - text = line - else: - # Not the last chunk so get the text up to the next tag - # and remove the text from line - text = line[:line.find("{!")] - line = line[line.find("{!"):] - - chunks.append((color, text)) - - return chunks - - for line in text.splitlines(): - # We need to check for line lengths here and split as necessary - try: - line_length = colors.get_line_length(line) - except colors.BadColorString: - log.error("Passed a bad colored string..") - line_length = len(line) - - if line_length >= (self.cols - 1): - s = "" - # The length of the text without the color tags - s_len = 0 - # We need to split this over multiple lines - for chunk in get_line_chunks(line): - if (len(chunk[1]) + s_len) < (self.cols - 1): - # This chunk plus the current string in 's' isn't over - # the maximum width, so just append the color tag and text - s += chunk[0] + chunk[1] - s_len += len(chunk[1]) - else: - # The chunk plus the current string in 's' is too long. - # We need to take as much of the chunk and put it into 's' - # with the color tag. - remain = (self.cols - 1) - s_len - s += chunk[0] + chunk[1][:remain] - # We append the line since it's full - self.lines.append(s) - # Start a new 's' with the remainder chunk - s = chunk[0] + chunk[1][remain:] - s_len = len(chunk[1][remain:]) - # Append the final string which may or may not be the full width - if s: - self.lines.append(s) - else: - self.lines.append(line) - - while len(self.lines) > LINES_BUFFER_SIZE: - # Remove the oldest line if the max buffer size has been reached - del self.lines[0] - - if refresh: - self.refresh() - - def add_string(self, row, string): - """ - Adds a string to the desired `:param:row`. - - :param row: int, the row number to write the string - - """ - col = 0 - try: - parsed = colors.parse_color_string(string, self.encoding) - except colors.BadColorString, e: - log.error("Cannot add bad color string %s: %s", string, e) - return - - for index, (color, s) in enumerate(parsed): - if index + 1 == len(parsed): - # This is the last string so lets append some " " to it - s += " " * (self.cols - (col + len(s)) - 1) - try: - self.stdscr.addstr(row, col, s, color) - except curses.error: - pass - - col += len(s) - - def refresh(self): - """ - Refreshes the screen. - Updates the lines based on the`:attr:lines` based on the `:attr:display_lines_offset` - attribute and the status bars. - """ - self.stdscr.clear() - - # Update the status bars - self.add_string(0, self.topbar) - self.add_string(self.rows - 2, self.bottombar) - - # The number of rows minus the status bars and the input line - available_lines = self.rows - 3 - # If the amount of lines exceeds the number of rows, we need to figure out - # which ones to display based on the offset - if len(self.lines) > available_lines: - # Get the lines to display based on the offset - offset = len(self.lines) - self.display_lines_offset - lines = self.lines[-(available_lines - offset):offset] - elif len(self.lines) == available_lines: - lines = self.lines - else: - lines = [""] * (available_lines - len(self.lines)) - lines.extend(self.lines) - - # Add the lines to the screen - for index, line in enumerate(lines): - self.add_string(index + 1, line) - - # Add the input string - self.add_string(self.rows - 1, self.input) - - # Move the cursor - try: - self.stdscr.move(self.rows - 1, self.input_cursor) - except curses.error: - pass - self.stdscr.redrawwin() - self.stdscr.refresh() - - def doRead(self): - """ - Called when there is data to be read, ie, input from the keyboard. - """ - # We wrap this function to catch exceptions and shutdown the mainloop - try: - self._doRead() - except Exception, e: - log.exception(e) - reactor.stop() - - def _doRead(self): - # Read the character - c = self.stdscr.getch() - - # We clear the input string and send it to the command parser on ENTER - if c == curses.KEY_ENTER or c == 10: - if self.input: - self.add_line(">>> " + self.input) - self.command_parser(self.input.encode(self.encoding)) - if len(self.input_history) == INPUT_HISTORY_SIZE: - # Remove the oldest input history if the max history size - # is reached. - del self.input_history[0] - self.input_history.append(self.input) - self.input_history_index = len(self.input_history) - self.input = "" - self.input_incomplete = "" - self.input_cursor = 0 - self.stdscr.refresh() - - # Run the tab completer function - elif c == 9: - # Keep track of tab hit count to know when it's double-hit - self.tab_count += 1 - if self.tab_count > 1: - second_hit = True - self.tab_count = 0 - else: - second_hit = False - - if self.tab_completer: - # We only call the tab completer function if we're at the end of - # the input string on the cursor is on a space - if self.input_cursor == len(self.input) or self.input[self.input_cursor] == " ": - self.input, self.input_cursor = self.tab_completer(self.input, self.input_cursor, second_hit) - - # We use the UP and DOWN keys to cycle through input history - elif c == curses.KEY_UP: - if self.input_history_index - 1 >= 0: - if self.input_history_index == len(self.input_history): - # We're moving from non-complete input so save it just incase - # we move back down to it. - self.input_incomplete = self.input - # Going back in the history - self.input_history_index -= 1 - self.input = self.input_history[self.input_history_index] - self.input_cursor = len(self.input) - elif c == curses.KEY_DOWN: - if self.input_history_index + 1 < len(self.input_history): - # Going forward in the history - self.input_history_index += 1 - self.input = self.input_history[self.input_history_index] - self.input_cursor = len(self.input) - elif self.input_history_index + 1 == len(self.input_history): - # We're moving back down to an incomplete input - self.input_history_index += 1 - self.input = self.input_incomplete - self.input_cursor = len(self.input) - - # Cursor movement - elif c == curses.KEY_LEFT: - if self.input_cursor: - self.input_cursor -= 1 - elif c == curses.KEY_RIGHT: - if self.input_cursor < len(self.input): - self.input_cursor += 1 - elif c == curses.KEY_HOME: - self.input_cursor = 0 - elif c == curses.KEY_END: - self.input_cursor = len(self.input) - - # Scrolling through buffer - elif c == curses.KEY_PPAGE: - self.display_lines_offset += self.rows - 3 - # We substract 3 for the unavailable lines and 1 extra due to len(self.lines) - if self.display_lines_offset > (len(self.lines) - 4 - self.rows): - self.display_lines_offset = len(self.lines) - 4 - self.rows - - self.refresh() - elif c == curses.KEY_NPAGE: - self.display_lines_offset -= self.rows - 3 - if self.display_lines_offset < 0: - self.display_lines_offset = 0 - self.refresh() - - # We remove the tab count if the key wasn't a tab - if c != 9: - self.tab_count = 0 - - # Delete a character in the input string based on cursor position - if c == curses.KEY_BACKSPACE or c == 127: - if self.input and self.input_cursor > 0: - self.input = self.input[:self.input_cursor - 1] + self.input[self.input_cursor:] - self.input_cursor -= 1 - - elif c == curses.KEY_DC: - if self.input and self.input_cursor < len(self.input): - self.input = self.input[:self.input_cursor] + self.input[self.input_cursor + 1:] - - # A key to add to the input string - else: - if c > 31 and c < 256: - # Emulate getwch - stroke = chr(c) - uchar = "" - while not uchar: - try: - uchar = stroke.decode(self.encoding) - except UnicodeDecodeError: - c = self.stdscr.getch() - stroke += chr(c) - - if uchar: - if self.input_cursor == len(self.input): - self.input += uchar - else: - # Insert into string - self.input = self.input[:self.input_cursor] + uchar + self.input[self.input_cursor:] - - # Move the cursor forward - self.input_cursor += 1 - - # Update the input string on the screen - self.add_string(self.rows - 1, self.input) - try: - self.stdscr.move(self.rows - 1, self.input_cursor) - except curses.error: - pass - self.stdscr.refresh() - - def close(self): - """ - Clean up the curses stuff on exit. - """ - curses.nocbreak() - self.stdscr.keypad(0) - curses.echo() - curses.endwin()