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poezio/src/theming.py
Florent Le Coz 341da5b18e remove white from the nick colors
2011-10-01 22:47:47 +02:00

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# Copyright 2010-2011 Florent Le Coz <louiz@louiz.org>
#
# This file is part of Poezio.
#
# Poezio is free software: you can redistribute it and/or modify
# it under the terms of the zlib license. See the COPYING file.
"""
Define the variables (colors and some other stuff) that are
used when drawing the interface.
Colors are numbers from -1 to 7 (if only 8 colors are supported) or -1 to 255
if 256 colors are available.
We check the number of available colors at startup, and we load a theme accordingly.
A 8 color theme should NEVER use colors not in the -1 -> 7 range. We won't check that
at run time. If the case occurs, the THEME should be fixed.
XHTML-IM colors are converted to -1 -> 255 colors if available, or directly to
-1 -> 8 if we are in 8-color-mode.
A pair_color is a background-foreground pair. All possible pairs are not created
at startup, because that would create 256*256 pairs, and almost all of them
would never be used.
So, a theme should define color tuples, like (200, -1), and when they are to
be used by poezio's interface, they will be created once, and kept in a list for
later usage.
A color tuple is of the form (foreground, background, optional)
A color of -1 means the default color. So if you do not want to have
a background color, use (x, -1).
The optional third value of the tuple defines additional information. It
is a string and can contain one or more of these characteres:
'b': bold
'u': underlined
'x': blink
For example, (200, 208, 'bu') is bold, underlined and pink foreground on orange background.
A theme file is a python file containing one object named 'theme', which is an
instance of a class (derived from the Theme class) defined in that same file.
For example, in pinkytheme.py:
import theming
class PinkyTheme(theming.Theme):
COLOR_NORMAL_TEXT = (200, -1)
theme = PinkyTheme()
if the command '/theme pinkytheme' is issued, we import the pinkytheme.py file
and set the global variable 'theme' to pinkytheme.theme.
And in poezio's code we just use theme.COLOR_NORMAL_TEXT etc
Since a theme inherites from the Theme class (defined here), if a color is not defined in a
theme file, the color is the default one.
Some values in that class are a list of color tuple.
For example [(1, -1), (2, -1), (3, -1)]
Such a list SHOULD contain at list one color tuple.
It is used for example to define color gradient, etc.
"""
import logging
log = logging.getLogger(__name__)
from config import config
import curses
import imp
import os
class Theme(object):
"""
The theme class, from which all theme should inherit.
All of the following value can be replaced in subclasses, in
order to create a new theme.
Do not edit this file if you want to change the theme to suit your
needs. Create a new theme and share it if you think it can be useful
for others.
"""
# Message text color
COLOR_NORMAL_TEXT = (-1, -1)
COLOR_INFORMATION_TEXT = (137, -1) # TODO
COLOR_HIGHLIGHT_NICK = (3, 5, 'b')
# User list color
COLOR_USER_VISITOR = (0, -1)
COLOR_USER_PARTICIPANT = (4, -1)
COLOR_USER_NONE = (0, -1)
COLOR_USER_MODERATOR = (1, -1)
# nickname colors
COLOR_REMOTE_USER = (5, -1)
# The character printed in color (COLOR_STATUS_*) before the nickname
# in the user list
CHAR_STATUS = '|'
# Separators
COLOR_VERTICAL_SEPARATOR = (4, -1)
COLOR_NEW_TEXT_SEPARATOR = (2, -1)
COLOR_MORE_INDICATOR = (6, 4)
# Time
COLOR_TIME_SEPARATOR = (106, -1)
COLOR_TIME_LIMITER = (0, -1)
CHAR_TIME_LEFT = ''
CHAR_TIME_RIGHT = ''
COLOR_TIME_NUMBERS = (0, -1)
# Tabs
COLOR_TAB_NORMAL = (7, 4)
COLOR_TAB_CURRENT = (7, 6)
COLOR_TAB_NEW_MESSAGE = (7, 5)
COLOR_TAB_HIGHLIGHT = (7, 1)
COLOR_TAB_PRIVATE = (7, 2)
COLOR_TAB_DISCONNECTED = (7, 8)
# Nickname colors
# A list of colors randomly attributed to nicks in MUCs
# Setting more colors makes it harder to have two nicks with the same color,
# avoiding confusions.
LIST_COLOR_NICKNAMES = [(1, -1), (2, -1), (3, -1), (4, -1), (5, -1), (6, -1), (8, -1), (9, -1), (10, -1), (11, -1), (12, -1), (13, -1), (14, -1), (23, -1), (23, -1), (88, -1), (99, -1), (100, -1), (154, -1), (213, -1), (216, -1), (227, -1)]
# This is your own nickname
COLOR_OWN_NICK = (254, -1)
# Status color
COLOR_STATUS_XA = (16, 90)
COLOR_STATUS_NONE = (16, 4)
COLOR_STATUS_DND = (16, 1)
COLOR_STATUS_AWAY = (16, 3)
COLOR_STATUS_CHAT = (16, 2)
COLOR_STATUS_UNAVAILABLE = (-1, 247)
COLOR_STATUS_ONLINE = (16, 4)
# Bars
COLOR_INFORMATION_BAR = (7, 4)
COLOR_TOPIC_BAR = (7, 4)
COLOR_SCROLLABLE_NUMBER = (220, 4, 'b')
COLOR_SELECTED_ROW = (-1, 33)
COLOR_PRIVATE_NAME = (-1, 4)
COLOR_CONVERSATION_NAME = (2, 4)
COLOR_GROUPCHAT_NAME = (7, 4)
COLOR_COLUMN_HEADER = (36, 4)
# Strings for special messages (like join, quit, nick change, etc)
# Special messages
CHAR_JOIN = '--->'
CHAR_QUIT = '<---'
CHAR_KICK = '-!-'
COLOR_JOIN_CHAR = (4, -1)
COLOR_QUIT_CHAR = (1, -1)
COLOR_KICK_CHAR = (1, -1)
# This is the default theme object, used if no theme is defined in the conf
theme = Theme()
# a dict "color tuple -> color_pair"
# Each time we use a color tuple, we check if it has already been used.
# If not we create a new color_pair and keep it in that dict, to use it
# the next time.
curses_colors_dict = {}
table_256_to_16 = [
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
0, 4, 4, 4, 12, 12, 2, 6, 4, 4, 12, 12, 2, 2, 6, 4,
12, 12, 2, 2, 2, 6, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10,
10, 10, 10, 14, 1, 5, 4, 4, 12, 12, 3, 8, 4, 4, 12, 12,
2, 2, 6, 4, 12, 12, 2, 2, 2, 6, 12, 12, 10, 10, 10, 10,
14, 12, 10, 10, 10, 10, 10, 14, 1, 1, 5, 4, 12, 12, 1, 1,
5, 4, 12, 12, 3, 3, 8, 4, 12, 12, 2, 2, 2, 6, 12, 12,
10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14, 1, 1, 1, 5,
12, 12, 1, 1, 1, 5, 12, 12, 1, 1, 1, 5, 12, 12, 3, 3,
3, 7, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14,
9, 9, 9, 9, 13, 12, 9, 9, 9, 9, 13, 12, 9, 9, 9, 9,
13, 12, 9, 9, 9, 9, 13, 12, 11, 11, 11, 11, 7, 12, 10, 10,
10, 10, 10, 14, 9, 9, 9, 9, 9, 13, 9, 9, 9, 9, 9, 13,
9, 9, 9, 9, 9, 13, 9, 9, 9, 9, 9, 13, 9, 9, 9, 9,
9, 13, 11, 11, 11, 11, 11, 15, 0, 0, 0, 0, 0, 0, 8, 8,
8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 15, 15, 15, 15, 15, 15
]
def color_256_to_16(color):
if color == -1:
return color
return table_256_to_16[color]
def to_curses_attr(color_tuple):
"""
Takes a color tuple (as defined at the top of this file) and
returns a valid curses attr that can be passed directly to attron() or attroff()
"""
# extract the color from that tuple
if len(color_tuple) == 3:
colors = (color_tuple[0], color_tuple[1])
else:
colors = color_tuple
bold = False
if curses.COLORS != 256:
# We are not in a term supporting 256 colors, so we convert
# colors to numbers between -1 and 8
colors = (color_256_to_16(colors[0]), color_256_to_16(colors[1]))
if colors[0] >= 8:
colors = (colors[0] - 8, colors[1])
bold = True
if colors[1] >= 8:
colors = (colors[0], colors[1] - 8)
# check if we already used these colors
try:
pair = curses_colors_dict[colors]
except KeyError:
pair = len(curses_colors_dict) + 1
curses.init_pair(pair, colors[0], colors[1])
curses_colors_dict[colors] = pair
curses_pair = curses.color_pair(pair)
if len(color_tuple) == 3:
additional_val = color_tuple[2]
if 'b' in additional_val or bold is True:
curses_pair = curses_pair | curses.A_BOLD
if 'u' in additional_val:
curses_pair = curses_pair | curses.A_UNDERLINE
if 'a' in additional_val:
curses_pair = curses_pair | curses.A_BLINK
return curses_pair
def get_theme():
"""
Returns the current theme
"""
return theme
def reload_theme():
themes_dir = config.get('themes_dir', '')
themes_dir = themes_dir or\
os.path.join(os.environ.get('XDG_DATA_HOME') or\
os.path.join(os.environ.get('HOME'), '.local', 'share'),
'poezio', 'themes')
try:
os.makedirs(themes_dir)
except OSError:
pass
theme_name = config.get('theme', '')
if not theme_name:
return
try:
file_path = os.path.join(themes_dir, theme_name)+'.py'
log.debug('Theme file to load: %s' %(file_path,))
new_theme = imp.load_source('theme', os.path.join(themes_dir, theme_name)+'.py')
except: # TODO warning: theme not found
return
global theme
theme = new_theme.theme
if __name__ == '__main__':
"""
Display some nice text with nice colors
"""
s = curses.initscr()
curses.start_color()
curses.use_default_colors()
s.addstr('%s' % curses.COLORS, to_curses_attr((3, -1, 'a')))
s.refresh()
s.getkey()
curses.endwin()
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