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#!/usr/bin/env python
# encoding: utf-8
#
# Copyright (c) 2015, Canonical Ltd.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""A colorful ANSI color demonstration with Guacamole."""
from __future__ import absolute_import, print_function, unicode_literals
from guacamole import Command
class ANSIDemo(Command):
"""Demonstration of ANSI SGR codes."""
def invoked(self, ctx):
"""Method called when the command is invoked."""
if not ctx.ansi.is_enabled:
print("You need color support to use this demo")
else:
print(ctx.ansi.cmd('erase_display'))
self._demo_fg_color(ctx)
self._demo_bg_color(ctx)
self._demo_bg_indexed(ctx)
self._demo_rgb(ctx)
self._demo_style(ctx)
def _demo_fg_color(self, ctx):
self._header("Foreground Color", ctx)
self._sub_header("Regular and Bright Foreground Sets", ctx)
# Regular
print(*[ctx.ansi('x' * (len(color) + 2), fg=color, bg='auto')
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' {} '.format(color.upper()), fg=color, bg='auto')
for color in ctx.ansi.available_colors])
print(*[ctx.ansi('x' * (len(color) + 2), fg=color, bg='auto')
for color in ctx.ansi.available_colors])
# Bright
print(*[ctx.ansi('x' * (len(color) + 2),
fg='bright_{}'.format(color), bg='auto')
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' {} '.format(color.upper()),
fg='bright_{}'.format(color), bg='auto')
for color in ctx.ansi.available_colors])
print(*[ctx.ansi('x' * (len(color) + 2),
fg='bright_{}'.format(color), bg='auto')
for color in ctx.ansi.available_colors])
def _demo_bg_color(self, ctx):
self._header("Background Color", ctx)
self._sub_header("Regular and Bright Background Sets", ctx)
# Regular
print(*[ctx.ansi(' ' * (len(color) + 2), bg=color)
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' {} '.format(color.upper()), fg='auto', bg=color)
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' ' * (len(color) + 2), bg=color)
for color in ctx.ansi.available_colors])
# Bright
print(*[ctx.ansi(' ' * (len(color) + 2), bg='bright_{}'.format(color))
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' {} '.format(color.upper()),
fg='auto', bg='bright_{}'.format(color))
for color in ctx.ansi.available_colors])
print(*[ctx.ansi(' ' * (len(color) + 2), bg='bright_{}'.format(color))
for color in ctx.ansi.available_colors])
def _demo_bg_indexed(self, ctx):
self._header("Indexed 8-bit Background Color", ctx)
self._sub_header("Regular and Bright Color Subsets", ctx)
print(*(
[ctx.ansi(' ' * 4, bg=i) for i in range(0x00, 0x07 + 1)]
+ [ctx.ansi(' ' * 4, bg=i) for i in range(0x08, 0x0F + 1)]))
print(*(
[ctx.ansi('{:02X}'.format(i).center(4), fg='auto', bg=i)
for i in range(0x00, 0x07 + 1)]
+ [ctx.ansi('{:02X}'.format(i).center(4), fg='auto', bg=i)
for i in range(0x08, 0x0F + 1)]))
print(*(
[ctx.ansi(' ' * 4, bg=i) for i in range(0x00, 0x07 + 1)]
+ [ctx.ansi(' ' * 4, bg=i) for i in range(0x08, 0x0F + 1)]))
self._sub_header("6 * 6 * 6 RGB color subset", ctx)
for y in range(6 * 3):
print(*(
[' ' * 5]
+ [ctx.ansi('{:02X}'.format(i).center(4), fg='auto', bg=i)
for i in range(0x10 + 6 * y, 0x10 + 6 * y + 6)]
+ [' ' * 6]
+ [ctx.ansi('{:02X}'.format(i).center(4), fg='auto', bg=i)
for i in range(0x7c + 6 * y, 0x7c + 6 * y + 6)]))
self._sub_header("24 grayscale colors", ctx)
print(
' ', *[ctx.ansi(' ' * 6, bg=i)
for i in range(0xE8, 0xF3 + 1)], sep='')
print(
' ', *[ctx.ansi('{:02X}'.format(i).center(6), fg='auto', bg=i)
for i in range(0xE8, 0xF3 + 1)], sep='')
print(
' ', *[ctx.ansi(' ' * 6, bg=i)
for i in range(0xE8, 0xF3 + 1)], sep='')
print(
' ', *[ctx.ansi(' ' * 6, bg=i)
for i in range(0xF4, 0xFF + 1)], sep='')
print(
' ', *[ctx.ansi('{:02X}'.format(i).center(6), fg='auto', bg=i)
for i in range(0xF4, 0xFF + 1)], sep='')
print(
' ', *[ctx.ansi(' ' * 6, bg=i)
for i in range(0xF4, 0xFF + 1)], sep='')
def _demo_rgb(self, ctx):
self._header("24 bit RGB Color", ctx)
self._sub_header("The bar below only displays 80 unique colors", ctx)
cols = 80
for y in range(3):
print(*[ctx.ansi(' ', fg='auto', bg=hsv(360.0 / cols * i, 1, 1))
for i in range(cols)], sep='')
def _demo_style(self, ctx):
self._header("Text style", ctx)
styles = ctx.ansi.available_styles
print(*[ctx.ansi(style, style=style) for style in styles])
def _header(self, text, ctx):
print(
ctx.ansi(' ' * (40 - len(text) // 2), bg=0xE2),
ctx.ansi(text, fg=0x10, bg=0xE2),
ctx.ansi(' ' * (40 - len(text) // 2), bg=0xE2),
sep='')
def _sub_header(self, text, ctx):
print(
ctx.ansi(text, fg=0xFF, bg=0x10),
ctx.ansi(' ' * (80 - len(text)), bg=0x10),
sep='')
def hsv(h, s, v):
"""Convert HSV (hue, saturation, value) to RGB."""
if 360 < h < 0:
raise ValueError("h out of range: {}".format(h))
if 1 < s < 0:
raise ValueError("s out of range: {}".format(h))
if 1 < v < 0:
raise ValueError("v out of range: {}".format(h))
c = v * s # chroma
h1 = h / 60
x = c * (1 - abs(h1 % 2 - 1))
if 0 <= h1 < 1:
r1, g1, b1 = (c, x, 0)
elif 1 <= h1 < 2:
r1, g1, b1 = (x, c, 0)
elif 2 <= h1 < 3:
r1, g1, b1 = (0, c, x)
elif 3 <= h1 < 4:
r1, g1, b1 = (0, x, c)
elif 4 <= h1 < 5:
r1, g1, b1 = (x, 0, c)
elif 5 <= h1 < 6:
r1, g1, b1 = (c, 0, x)
m = v - c
r, g, b = r1 + m, g1 + m, b1 + m
return int(r * 255), int(g * 255), int(b * 255)
if __name__ == '__main__':
ANSIDemo().main()
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