for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
# -*- coding: utf-8 -*-
#
# This file is part of Glances.
# Copyright (C) 2019 Nicolargo <[email protected]>
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# Glances 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 Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Curses interface class."""
from __future__ import unicode_literals
import re
import sys
from glances.compat import to_ascii, nativestr, b, u, itervalues
from glances.globals import MACOS, WINDOWS
from glances.logger import logger
from glances.events import glances_events
from glances.processes import glances_processes
from glances.timer import Timer
# Import curses library for "normal" operating system
if not WINDOWS:
try:
import curses
import curses.panel
from curses.textpad import Textbox
except ImportError:
logger.critical("Curses module not found. Glances cannot start in standalone mode.")
sys.exit(1)
class _GlancesCurses(object):
"""This class manages the curses display (and key pressed).
Note: It is a private class, use GlancesCursesClient or GlancesCursesBrowser.
"""
_hotkeys = {
'0': {'switch': 'disable_irix'},
'1': {'switch': 'percpu'},
'2': {'switch': 'disable_left_sidebar'},
'3': {'switch': 'disable_quicklook'},
'6': {'switch': 'meangpu'},
'/': {'switch': 'process_short_name'},
'A': {'switch': 'disable_amps'},
'b': {'switch': 'byte'},
'B': {'switch': 'diskio_iops'},
'C': {'switch': 'disable_cloud'},
'D': {'switch': 'disable_docker'},
'd': {'switch': 'disable_diskio'},
'F': {'switch': 'fs_free_space'},
'g': {'switch': 'generate_graph'},
'G': {'switch': 'disable_gpu'},
'h': {'switch': 'help_tag'},
'I': {'switch': 'disable_ip'},
'l': {'switch': 'disable_alert'},
'M': {'switch': 'reset_minmax_tag'},
'n': {'switch': 'disable_network'},
'N': {'switch': 'disable_now'},
'P': {'switch': 'disable_ports'},
'Q': {'switch': 'enable_irq'},
'R': {'switch': 'disable_raid'},
's': {'switch': 'disable_sensors'},
'S': {'switch': 'sparkline'},
'T': {'switch': 'network_sum'},
'U': {'switch': 'network_cumul'},
'W': {'switch': 'disable_wifi'},
# Processes sort hotkeys
'a': {'auto_sort': True, 'sort_key': 'cpu_percent'},
'c': {'auto_sort': False, 'sort_key': 'cpu_percent'},
'i': {'auto_sort': False, 'sort_key': 'io_counters'},
'm': {'auto_sort': False, 'sort_key': 'memory_percent'},
'p': {'auto_sort': False, 'sort_key': 'name'},
't': {'auto_sort': False, 'sort_key': 'cpu_times'},
'u': {'auto_sort': False, 'sort_key': 'username'},
}
_sort_loop = ['cpu_percent', 'memory_percent', 'username',
'cpu_times', 'io_counters', 'name']
# Define top menu
_top = ['quicklook', 'cpu', 'percpu', 'gpu', 'mem', 'memswap', 'load']
_quicklook_max_width = 68
# Define left sidebar
_left_sidebar = ['network', 'wifi', 'ports', 'diskio', 'fs',
'irq', 'folders', 'raid', 'sensors', 'now']
_left_sidebar_min_width = 23
_left_sidebar_max_width = 34
# Define right sidebar
_right_sidebar = ['docker', 'processcount', 'amps', 'processlist', 'alert']
def __init__(self, config=None, args=None):
# Init
self.config = config
self.args = args
# Init windows positions
self.term_w = 80
self.term_h = 24
# Space between stats
self.space_between_column = 3
self.space_between_line = 2
# Init the curses screen
self.screen = curses.initscr()
if not self.screen:
logger.critical("Cannot init the curses library.\n")
# Load the 'outputs' section of the configuration file
# - Init the theme (default is black)
self.theme = {'name': 'black'}
# Load configuration file
self.load_config(config)
# Init cursor
self._init_cursor()
# Init the colors
self._init_colors()
# Init main window
self.term_window = self.screen.subwin(0, 0)
# Init edit filter tag
self.edit_filter = False
# Init the process min/max reset
self.args.reset_minmax_tag = False
# Catch key pressed with non blocking mode
self.term_window.keypad(1)
self.term_window.nodelay(1)
self.pressedkey = -1
# History tag
self._init_history()
def load_config(self, config):
"""Load the outputs section of the configuration file."""
# Load the theme
if config is not None and config.has_section('outputs'):
logger.debug('Read the outputs section in the configuration file')
self.theme['name'] = config.get_value('outputs', 'curse_theme', default='black')
logger.debug('Theme for the curse interface: {}'.format(self.theme['name']))
def is_theme(self, name):
"""Return True if the theme *name* should be used."""
return getattr(self.args, 'theme_' + name) or self.theme['name'] == name
def _init_history(self):
"""Init the history option."""
self.reset_history_tag = False
def _init_cursor(self):
"""Init cursors."""
if hasattr(curses, 'noecho'):
curses.noecho()
if hasattr(curses, 'cbreak'):
curses.cbreak()
self.set_cursor(0)
def _init_colors(self):
"""Init the Curses color layout."""
# Set curses options
if hasattr(curses, 'start_color'):
curses.start_color()
if hasattr(curses, 'use_default_colors'):
curses.use_default_colors()
except Exception as e:
logger.warning('Error initializing terminal color ({})'.format(e))
# Init colors
if self.args.disable_bold:
A_BOLD = 0
self.args.disable_bg = True
else:
A_BOLD = curses.A_BOLD
self.title_color = A_BOLD
self.title_underline_color = A_BOLD | curses.A_UNDERLINE
self.help_color = A_BOLD
if curses.has_colors():
# The screen is compatible with a colored design
if self.is_theme('white'):
# White theme: black ==> white
curses.init_pair(1, curses.COLOR_BLACK, -1)
curses.init_pair(1, curses.COLOR_WHITE, -1)
if self.args.disable_bg:
curses.init_pair(2, curses.COLOR_RED, -1)
curses.init_pair(3, curses.COLOR_GREEN, -1)
curses.init_pair(4, curses.COLOR_BLUE, -1)
curses.init_pair(5, curses.COLOR_MAGENTA, -1)
curses.init_pair(2, curses.COLOR_WHITE, curses.COLOR_RED)
curses.init_pair(3, curses.COLOR_WHITE, curses.COLOR_GREEN)
curses.init_pair(4, curses.COLOR_WHITE, curses.COLOR_BLUE)
curses.init_pair(5, curses.COLOR_WHITE, curses.COLOR_MAGENTA)
curses.init_pair(6, curses.COLOR_RED, -1)
curses.init_pair(7, curses.COLOR_GREEN, -1)
curses.init_pair(8, curses.COLOR_BLUE, -1)
# Colors text styles
if curses.COLOR_PAIRS > 8:
curses.init_pair(9, curses.COLOR_MAGENTA, -1)
except Exception:
curses.init_pair(9, curses.COLOR_BLACK, -1)
curses.init_pair(9, curses.COLOR_WHITE, -1)
curses.init_pair(10, curses.COLOR_CYAN, -1)
curses.init_pair(10, curses.COLOR_BLACK, -1)
curses.init_pair(10, curses.COLOR_WHITE, -1)
self.ifWARNING_color2 = curses.color_pair(9) | A_BOLD
self.ifCRITICAL_color2 = curses.color_pair(6) | A_BOLD
self.filter_color = curses.color_pair(10) | A_BOLD
self.no_color = curses.color_pair(1)
self.default_color = curses.color_pair(3) | A_BOLD
self.nice_color = curses.color_pair(9)
self.cpu_time_color = curses.color_pair(9)
self.ifCAREFUL_color = curses.color_pair(4) | A_BOLD
self.ifWARNING_color = curses.color_pair(5) | A_BOLD
self.ifCRITICAL_color = curses.color_pair(2) | A_BOLD
self.default_color2 = curses.color_pair(7)
self.ifCAREFUL_color2 = curses.color_pair(8) | A_BOLD
# The screen is NOT compatible with a colored design
# switch to B&W text styles
self.no_color = curses.A_NORMAL
self.default_color = curses.A_NORMAL
self.nice_color = A_BOLD
self.cpu_time_color = A_BOLD
self.ifCAREFUL_color = curses.A_UNDERLINE
self.ifWARNING_color = A_BOLD
self.ifCRITICAL_color = curses.A_REVERSE
self.default_color2 = curses.A_NORMAL
self.ifCAREFUL_color2 = curses.A_UNDERLINE
self.ifWARNING_color2 = A_BOLD
self.ifCRITICAL_color2 = curses.A_REVERSE
self.filter_color = A_BOLD
# Define the colors list (hash table) for stats
self.colors_list = {
'DEFAULT': self.no_color,
'UNDERLINE': curses.A_UNDERLINE,
'BOLD': A_BOLD,
'SORT': A_BOLD,
'OK': self.default_color2,
'MAX': self.default_color2 | curses.A_BOLD,
'FILTER': self.filter_color,
'TITLE': self.title_color,
'PROCESS': self.default_color2,
'STATUS': self.default_color2,
'NICE': self.nice_color,
'CPU_TIME': self.cpu_time_color,
'CAREFUL': self.ifCAREFUL_color2,
'WARNING': self.ifWARNING_color2,
'CRITICAL': self.ifCRITICAL_color2,
'OK_LOG': self.default_color,
'CAREFUL_LOG': self.ifCAREFUL_color,
'WARNING_LOG': self.ifWARNING_color,
'CRITICAL_LOG': self.ifCRITICAL_color,
'PASSWORD': curses.A_PROTECT
def set_cursor(self, value):
"""Configure the curse cursor apparence.
0: invisible
1: visible
2: very visible
if hasattr(curses, 'curs_set'):
curses.curs_set(value)
pass
# def get_key(self, window):
# # Catch ESC key AND numlock key (issue #163)
# keycode = [0, 0]
# keycode[0] = window.getch()
# keycode[1] = window.getch()
# if keycode != [-1, -1]:
# logger.debug("Keypressed (code: %s)" % keycode)
# if keycode[0] == 27 and keycode[1] != -1:
# # Do not escape on specials keys
# return -1
# else:
# return keycode[0]
def get_key(self, window):
# @TODO: Check issue #163
ret = window.getch()
logger.debug("Keypressed (code: %s)" % ret)
return ret
def __catch_key(self, return_to_browser=False):
# Catch the pressed key
self.pressedkey = self.get_key(self.term_window)
# Actions (available in the global hotkey dict)...
for hotkey in self._hotkeys:
if self.pressedkey == ord(hotkey) and 'switch' in self._hotkeys[hotkey]:
setattr(self.args,
self._hotkeys[hotkey]['switch'],
not getattr(self.args,
self._hotkeys[hotkey]['switch']))
if self.pressedkey == ord(hotkey) and 'auto_sort' in self._hotkeys[hotkey]:
setattr(glances_processes,
'auto_sort',
self._hotkeys[hotkey]['auto_sort'])
if self.pressedkey == ord(hotkey) and 'sort_key' in self._hotkeys[hotkey]:
'sort_key',
self._hotkeys[hotkey]['sort_key'])
# Other actions...
if self.pressedkey == ord('\x1b') or self.pressedkey == ord('q'):
# 'ESC'|'q' > Quit
if return_to_browser:
logger.info("Stop Glances client and return to the browser")
logger.info("Stop Glances (keypressed: {})".format(self.pressedkey))
elif self.pressedkey == ord('\n'):
# 'ENTER' > Edit the process filter
self.edit_filter = not self.edit_filter
elif self.pressedkey == ord('4'):
self.args.full_quicklook = not self.args.full_quicklook
if self.args.full_quicklook:
self.enable_fullquicklook()
self.disable_fullquicklook()
elif self.pressedkey == ord('5'):
self.args.disable_top = not self.args.disable_top
if self.args.disable_top:
self.disable_top()
self.enable_top()
elif self.pressedkey == ord('e'):
# 'e' > Enable/Disable process extended
self.args.enable_process_extended = not self.args.enable_process_extended
if not self.args.enable_process_extended:
glances_processes.disable_extended()
glances_processes.enable_extended()
elif self.pressedkey == ord('E'):
# 'E' > Erase the process filter
glances_processes.process_filter = None
elif self.pressedkey == ord('f'):
# 'f' > Show/hide fs / folder stats
self.args.disable_fs = not self.args.disable_fs
self.args.disable_folders = not self.args.disable_folders
elif self.pressedkey == ord('w'):
# 'w' > Delete finished warning logs
glances_events.clean()
elif self.pressedkey == ord('x'):
# 'x' > Delete finished warning and critical logs
glances_events.clean(critical=True)
elif self.pressedkey == ord('z'):
# 'z' > Enable or disable processes
self.args.disable_process = not self.args.disable_process
if self.args.disable_process:
glances_processes.disable()
glances_processes.enable()
elif self.pressedkey == curses.KEY_LEFT:
# "<" (left arrow) navigation through process sort
setattr(glances_processes, 'auto_sort', False)
next_sort = (self.loop_position() - 1) % len(self._sort_loop)
glances_processes.sort_key = self._sort_loop[next_sort]
elif self.pressedkey == curses.KEY_RIGHT:
# ">" (right arrow) navigation through process sort
next_sort = (self.loop_position() + 1) % len(self._sort_loop)
# Return the key code
return self.pressedkey
def loop_position(self):
"""Return the current sort in the loop"""
for i, v in enumerate(self._sort_loop):
if v == glances_processes.sort_key:
return i
return 0
def disable_top(self):
"""Disable the top panel"""
for p in ['quicklook', 'cpu', 'gpu', 'mem', 'memswap', 'load']:
setattr(self.args, 'disable_' + p, True)
def enable_top(self):
"""Enable the top panel"""
setattr(self.args, 'disable_' + p, False)
def disable_fullquicklook(self):
"""Disable the full quicklook mode"""
for p in ['quicklook', 'cpu', 'gpu', 'mem', 'memswap']:
def enable_fullquicklook(self):
self.args.disable_quicklook = False
for p in ['cpu', 'gpu', 'mem', 'memswap']:
def end(self):
"""Shutdown the curses window."""
if hasattr(curses, 'echo'):
curses.echo()
if hasattr(curses, 'nocbreak'):
curses.nocbreak()
curses.curs_set(1)
curses.endwin()
def init_line_column(self):
"""Init the line and column position for the curses interface."""
self.init_line()
self.init_column()
def init_line(self):
"""Init the line position for the curses interface."""
self.line = 0
self.next_line = 0
def init_column(self):
"""Init the column position for the curses interface."""
self.column = 0
self.next_column = 0
def new_line(self):
"""New line in the curses interface."""
self.line = self.next_line
def new_column(self):
"""New column in the curses interface."""
self.column = self.next_column
def __get_stat_display(self, stats, layer):
"""Return a dict of dict with all the stats display.
stats: Global stats dict
layer: ~ cs_status
"None": standalone or server mode
"Connected": Client is connected to a Glances server
"SNMP": Client is connected to a SNMP server
"Disconnected": Client is disconnected from the server
:returns: dict of dict
* key: plugin name
* value: dict returned by the get_stats_display Plugin method
ret = {}
for p in stats.getPluginsList(enable=False):
if p == 'quicklook' or p == 'processlist':
# processlist is done later
# because we need to know how many processes could be displayed
continue
# Compute the plugin max size
plugin_max_width = None
if p in self._left_sidebar:
plugin_max_width = max(self._left_sidebar_min_width,
self.screen.getmaxyx()[1] - 105)
plugin_max_width = min(self._left_sidebar_max_width,
plugin_max_width)
# Get the view
ret[p] = stats.get_plugin(p).get_stats_display(args=self.args,
max_width=plugin_max_width)
def display(self, stats, cs_status=None):
"""Display stats on the screen.
stats: Stats database to display
cs_status:
Return:
True if the stats have been displayed
False if the help have been displayed
# Init the internal line/column for Glances Curses
self.init_line_column()
# Update the stats messages
###########################
# Get all the plugins but quicklook and proceslist
self.args.cs_status = cs_status
__stat_display = self.__get_stat_display(stats, layer=cs_status)
# Adapt number of processes to the available space
max_processes_displayed = (
self.screen.getmaxyx()[0] - 11 -
(0 if 'docker' not in __stat_display else
self.get_stats_display_height(__stat_display["docker"])) -
(0 if 'processcount' not in __stat_display else
self.get_stats_display_height(__stat_display["processcount"])) -
(0 if 'amps' not in __stat_display else
self.get_stats_display_height(__stat_display["amps"])) -
(0 if 'alert' not in __stat_display else
self.get_stats_display_height(__stat_display["alert"])))
if self.args.enable_process_extended:
max_processes_displayed -= 4
except AttributeError:
if max_processes_displayed < 0:
max_processes_displayed = 0
if (glances_processes.max_processes is None or
glances_processes.max_processes != max_processes_displayed):
logger.debug("Set number of displayed processes to {}".format(max_processes_displayed))
glances_processes.max_processes = max_processes_displayed
# Get the processlist
__stat_display["processlist"] = stats.get_plugin(
'processlist').get_stats_display(args=self.args)
# Display the stats on the curses interface
###########################################
# Help screen (on top of the other stats)
if self.args.help_tag:
# Display the stats...
self.display_plugin(
stats.get_plugin('help').get_stats_display(args=self.args))
# ... and exit
return False
# =====================================
# Display first line (system+ip+uptime)
# Optionnaly: Cloud on second line
self.__display_header(__stat_display)
# ==============================================================
# Display second line (<SUMMARY>+CPU|PERCPU+<GPU>+LOAD+MEM+SWAP)
self.__display_top(__stat_display, stats)
# ==================================================================
# Display left sidebar (NETWORK+PORTS+DISKIO+FS+SENSORS+Current time)
self.__display_left(__stat_display)
# ====================================
# Display right stats (process and co)
self.__display_right(__stat_display)
# =====================
# Others popup messages
# Display edit filter popup
# Only in standalone mode (cs_status is None)
if self.edit_filter and cs_status is None:
new_filter = self.display_popup(
'Process filter pattern: \n\n' +
'Examples:\n' +
'- python\n' +
'- .*python.*\n' +
'- /usr/lib.*\n' +
'- name:.*nautilus.*\n' +
'- cmdline:.*glances.*\n' +
'- username:nicolargo\n' +
'- username:^root ',
is_input=True,
input_value=glances_processes.process_filter_input)
glances_processes.process_filter = new_filter
elif self.edit_filter and cs_status is not None:
self.display_popup('Process filter only available in standalone mode')
# Display graph generation popup
if self.args.generate_graph:
self.display_popup('Generate graph in {}'.format(self.args.export_graph_path))
return True
def __display_header(self, stat_display):
"""Display the firsts lines (header) in the Curses interface.
system + ip + uptime
(cloud)
# First line
self.new_line()
self.space_between_column = 0
l_uptime = (self.get_stats_display_width(stat_display["system"]) +
self.get_stats_display_width(stat_display["ip"]) +
self.get_stats_display_width(stat_display["uptime"]) + 1)
stat_display["system"],
display_optional=(self.screen.getmaxyx()[1] >= l_uptime))
self.new_column()
self.display_plugin(stat_display["ip"])
stat_display["uptime"],
add_space=-(self.get_stats_display_width(stat_display["cloud"]) != 0))
# Second line (optional)
self.display_plugin(stat_display["cloud"])
def __display_top(self, stat_display, stats):
"""Display the second line in the Curses interface.
<QUICKLOOK> + CPU|PERCPU + <GPU> + MEM + SWAP + LOAD
# Init quicklook
stat_display['quicklook'] = {'msgdict': []}
# Dict for plugins width
plugin_widths = {}
for p in self._top:
plugin_widths[p] = self.get_stats_display_width(stat_display.get(p, 0)) if hasattr(self.args, 'disable_' + p) else 0
# Width of all plugins
stats_width = sum(itervalues(plugin_widths))
# Number of plugin but quicklook
stats_number = sum([int(stat_display[p]['msgdict'] != []) for p in self._top if not getattr(self.args, 'disable_' + p)])
if not self.args.disable_quicklook:
# Quick look is in the place !
quicklook_width = self.screen.getmaxyx()[1] - (stats_width + 8 + stats_number * self.space_between_column)
quicklook_width = min(self.screen.getmaxyx()[1] - (stats_width + 8 + stats_number * self.space_between_column),
self._quicklook_max_width - 5)
stat_display["quicklook"] = stats.get_plugin(
'quicklook').get_stats_display(max_width=quicklook_width, args=self.args)
except AttributeError as e:
logger.debug("Quicklook plugin not available (%s)" % e)
plugin_widths['quicklook'] = self.get_stats_display_width(stat_display["quicklook"])
stats_width = sum(itervalues(plugin_widths)) + 1
self.space_between_column = 1
self.display_plugin(stat_display["quicklook"])
# Compute spaces between plugins
# Note: Only one space between Quicklook and others
plugin_display_optional = {}
plugin_display_optional[p] = True
if stats_number > 1:
self.space_between_column = max(1, int((self.screen.getmaxyx()[1] - stats_width) / (stats_number - 1)))
for p in ['mem', 'cpu']:
# No space ? Remove optional stats
if self.space_between_column < 3:
plugin_display_optional[p] = False
plugin_widths[p] = self.get_stats_display_width(stat_display[p], without_option=True) if hasattr(self.args, 'disable_' + p) else 0
# Display CPU, MEM, SWAP and LOAD
if p == 'quicklook':
if p in stat_display:
self.display_plugin(stat_display[p],
display_optional=plugin_display_optional[p])
if p is not 'load':
# Skip last column
# Space between column
# Backup line position
self.saved_line = self.next_line
def __display_left(self, stat_display):
"""Display the left sidebar in the Curses interface."""
if self.args.disable_left_sidebar:
return
for p in self._left_sidebar:
if ((hasattr(self.args, 'enable_' + p) or
hasattr(self.args, 'disable_' + p)) and p in stat_display):
self.display_plugin(stat_display[p])
def __display_right(self, stat_display):
"""Display the right sidebar in the Curses interface.
docker + processcount + amps + processlist + alert
# Do not display anything if space is not available...
if self.screen.getmaxyx()[1] < self._left_sidebar_min_width:
# Restore line position
self.next_line = self.saved_line
# Display right sidebar
for p in self._right_sidebar:
if p not in p:
# Catch for issue #1470
if p == 'processlist':
self.display_plugin(stat_display['processlist'],
display_optional=(self.screen.getmaxyx()[1] > 102),
display_additional=(not MACOS),
max_y=(self.screen.getmaxyx()[0] - self.get_stats_display_height(stat_display['alert']) - 2))
def display_popup(self, message,
size_x=None, size_y=None,
duration=3,
is_input=False,
input_size=30,
input_value=None):
Display a centered popup.
If is_input is False:
Display a centered popup with the given message during duration seconds
If size_x and size_y: set the popup size
else set it automatically
Return True if the popup could be displayed
If is_input is True:
Display a centered popup with the given message and a input field
Return the input string or None if the field is empty
# Center the popup
sentence_list = message.split('\n')
if size_x is None:
size_x = len(max(sentence_list, key=len)) + 4
# Add space for the input field
if is_input:
size_x += input_size
if size_y is None:
size_y = len(sentence_list) + 4
screen_x = self.screen.getmaxyx()[1]
screen_y = self.screen.getmaxyx()[0]
if size_x > screen_x or size_y > screen_y:
# No size to display the popup => abord
pos_x = int((screen_x - size_x) / 2)
pos_y = int((screen_y - size_y) / 2)
# Create the popup
popup = curses.newwin(size_y, size_x, pos_y, pos_x)
# Fill the popup
popup.border()
# Add the message
for y, m in enumerate(message.split('\n')):
popup.addnstr(2 + y, 2, m, len(m))
if is_input and not WINDOWS:
# Create a subwindow for the text field
subpop = popup.derwin(1, input_size, 2, 2 + len(m))
subpop.attron(self.colors_list['FILTER'])
# Init the field with the current value
if input_value is not None:
subpop.addnstr(0, 0, input_value, len(input_value))
# Display the popup
popup.refresh()
subpop.refresh()
# Create the textbox inside the subwindows
self.set_cursor(2)
textbox = GlancesTextbox(subpop, insert_mode=False)
textbox.edit()
self.term_window.keypad(0)
if textbox.gather() != '':
logger.debug(
"User enters the following string: %s" % textbox.gather())
return textbox.gather()[:-1]
logger.debug("User centers an empty string")
return None
self.wait(duration * 1000)
def display_plugin(self, plugin_stats,
display_optional=True,
display_additional=True,
max_y=65535,
add_space=0):
"""Display the plugin_stats on the screen.
If display_optional=True display the optional stats
If display_additional=True display additionnal stats
max_y: do not display line > max_y
add_space: add x space (line) after the plugin
# Exit if:
# - the plugin_stats message is empty
# - the display tag = False
if plugin_stats is None or not plugin_stats['msgdict'] or not plugin_stats['display']:
# Exit
# Get the screen size
# Set the upper/left position of the message
if plugin_stats['align'] == 'right':
# Right align (last column)
display_x = screen_x - self.get_stats_display_width(plugin_stats)
display_x = self.column
if plugin_stats['align'] == 'bottom':
# Bottom (last line)
display_y = screen_y - self.get_stats_display_height(plugin_stats)
display_y = self.line
# Display
x = display_x
x_max = x
y = display_y
for m in plugin_stats['msgdict']:
# New line
if m['msg'].startswith('\n'):
# Go to the next line
y += 1
# Return to the first column
# Do not display outside the screen
if x < 0:
if not m['splittable'] and (x + len(m['msg']) > screen_x):
if y < 0 or (y + 1 > screen_y) or (y > max_y):
break
# If display_optional = False do not display optional stats
if not display_optional and m['optional']:
# If display_additional = False do not display additional stats
if not display_additional and m['additional']:
# Is it possible to display the stat with the current screen size
# !!! Crach if not try/except... Why ???
self.term_window.addnstr(y, x,
m['msg'],
# Do not disply outside the screen
screen_x - x,
self.colors_list[m['decoration']])
# New column
# Python 2: we need to decode to get real screen size because
# UTF-8 special tree chars occupy several bytes.
# Python 3: strings are strings and bytes are bytes, all is
# good.
x += len(u(m['msg']))
except UnicodeDecodeError:
# Quick and dirty hack for issue #745
if x > x_max:
# Compute the next Glances column/line position
self.next_column = max(
self.next_column, x_max + self.space_between_column)
self.next_line = max(self.next_line, y + self.space_between_line)
# Have empty lines after the plugins
self.next_line += add_space
def erase(self):
"""Erase the content of the screen."""
self.term_window.erase()
def flush(self, stats, cs_status=None):
"""Clear and update the screen.
"Connected": Client is connected to the server
self.erase()
self.display(stats, cs_status=cs_status)
def update(self,
stats,
cs_status=None,
return_to_browser=False):
"""Update the screen.
INPUT
duration: duration of the loop
return_to_browser:
True: Do not exist, return to the browser list
False: Exit and return to the shell
OUTPUT
True: Exit key has been pressed
False: Others cases...
# Flush display
self.flush(stats, cs_status=cs_status)
# If the duration is < 0 (update + export time > refresh_time)
# Then display the interface and log a message
if duration <= 0:
logger.warning('Update and export time higher than refresh_time.')
duration = 0.1
# Wait duration (in s) time
exitkey = False
countdown = Timer(duration)
# Set the default timeout (in ms) for the getch method
self.term_window.timeout(int(duration * 1000))
while not countdown.finished() and not exitkey:
# Getkey
pressedkey = self.__catch_key(return_to_browser=return_to_browser)
# Is it an exit key ?
exitkey = (pressedkey == ord('\x1b') or pressedkey == ord('q'))
if not exitkey and pressedkey > -1:
# Redraw display
# Overwrite the timeout with the countdown
self.term_window.timeout(int(countdown.get() * 1000))
return exitkey
def wait(self, delay=100):
"""Wait delay in ms"""
curses.napms(100)
def get_stats_display_width(self, curse_msg, without_option=False):
"""Return the width of the formatted curses message."""
if without_option:
# Size without options
c = len(max(''.join([(u(u(nativestr(i['msg'])).encode('ascii', 'replace')) if not i['optional'] else "")
for i in curse_msg['msgdict']]).split('\n'), key=len))
# Size with all options
c = len(max(''.join([u(u(nativestr(i['msg'])).encode('ascii', 'replace'))
logger.debug('ERROR: Can not compute plugin width ({})'.format(e))
return c
def get_stats_display_height(self, curse_msg):
r"""Return the height of the formatted curses message.
The height is defined by the number of '\n' (new line).
c = [i['msg'] for i in curse_msg['msgdict']].count('\n')
logger.debug('ERROR: Can not compute plugin height ({})'.format(e))
return c + 1
class GlancesCursesStandalone(_GlancesCurses):
"""Class for the Glances curse standalone."""
class GlancesCursesClient(_GlancesCurses):
"""Class for the Glances curse client."""
class GlancesTextbox(Textbox, object):
def __init__(self, *args, **kwargs):
super(GlancesTextbox, self).__init__(*args, **kwargs)
def do_command(self, ch):
if ch == 10: # Enter
if ch == 127: # Back
return 8
return super(GlancesTextbox, self).do_command(ch)
nicolargo /
glances
Nicolas Hennion
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