Sublime Text 3 commands to turn on/off/toggle trim_trailing_white_space_on_save

command_trim_trailing_space.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Sublime Text 3 commands to turn on/off/toggle trim_trailing_white_space_on_save.

Only temporarily affect current file (view).

How to use:
Save to your "/Sublime Text 3/Packages/User" directory.
"""

import sublime
import sublime_plugin


class TrimtrailingspaceEnableCommand(sublime_plugin.TextCommand):

    def run(self, edit):
        to_enable = True

        settings = self.view.settings()
        enabled = settings.get('trim_trailing_white_space_on_save') or None

        settings.set('trim_trailing_white_space_on_save', to_enable)

        old_status = "enabled" if enabled else "disabled"
        new_status = "enabled" if to_enable else "disabled"
        message = "Trim Trailing Space:\n\n{} -> {}"
        message = message.format(old_status, new_status)
        sublime.message_dialog(message)


class TrimtrailingspaceDisableCommand(sublime_plugin.TextCommand):

    def run(self, edit):
        to_enable = False

        settings = self.view.settings()
        enabled = settings.get('trim_trailing_white_space_on_save') or None

        settings.set('trim_trailing_white_space_on_save', to_enable)

        old_status = "enabled" if enabled else "disabled"
        new_status = "enabled" if to_enable else "disabled"
        message = "Trim Trailing Space:\n\n{} -> {}"
        message = message.format(old_status, new_status)
        sublime.message_dialog(message)


class TrimtrailingspaceToggleCommand(sublime_plugin.TextCommand):

    def run(self, edit):
        settings = self.view.settings()
        enabled = settings.get('trim_trailing_white_space_on_save') or None
        to_enable = not enabled

        settings.set('trim_trailing_white_space_on_save', to_enable)

        old_status = "enabled" if enabled else "disabled"
        new_status = "enabled" if to_enable else "disabled"
        message = "Trim Trailing Space:\n\n{} -> {}"
        message = message.format(old_status, new_status)
        sublime.message_dialog(message)



"""
Old way:
Change global setting, which affects all files.
"""

# class TrimtrailingspaceTurnonCommand(sublime_plugin.ApplicationCommand):

#     def run(self):
#         s = sublime.load_settings("Preferences.sublime-settings")
#         old = s.get('trim_trailing_white_space_on_save')
#         old = 'On' if old else 'Off'
#         s.set('trim_trailing_white_space_on_save', True)
#         sublime.save_settings("Preferences.sublime-settings")
#         message = "TrimTrailingSpace: Now {}, was {}".format('On', old)
#         sublime.status_message(message)


# class TrimtrailingspaceTurnoffCommand(sublime_plugin.ApplicationCommand):

#     def run(self):
#         s = sublime.load_settings("Preferences.sublime-settings")
#         old = s.get('trim_trailing_white_space_on_save')
#         old = 'On' if old else 'Off'
#         s.set('trim_trailing_white_space_on_save', False)
#         sublime.save_settings("Preferences.sublime-settings")
#         message = "TrimTrailingSpace: Now {}, was {}".format('Off', old)
#         sublime.status_message(message)

command_trim_trailing_space.sublime-commands

[{
  "caption": "Trim Trailing Space: Enable",
  "command": "trimtrailingspace_enable"
}, {
  "caption": "Trim Trailing Space: Disable",
  "command": "trimtrailingspace_disable"
}, {
  "caption": "Trim Trailing Space: Toggle",
  "command": "trimtrailingspace_toggle"
}]