hist.py

# NOTE(kaste): Take from https://github.com/randy3k/AlignTab

# Copyright (c) 2015 Randy Lai <randy.cs.lai@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


import sublime
import sublime_plugin


class History:
    hist = []
    index = None

    def insert(self, user_input):
        if not self.hist or (user_input != self.last() and user_input != "last_regex"):
            self.hist.append(user_input)
            self.index = None

    def roll(self, backwards=False):
        if self.index is None:
            self.index = -1 if backwards else 0
        else:
            self.index += -1 if backwards else 1

        if self.index == len(self.hist) or self.index < -len(self.hist):
                self.index = -1 if backwards else 0

    def last(self):
        return self.hist[-1] if self.hist else None

    def get(self, index=None):
        if not index:
            index = self.index
        return self.hist[index] if self.hist else None

    def reset_index(self):
        self.index = None

if 'history' not in globals():
    history = History()


class ShellCommandHistory(sublime_plugin.TextCommand):
    def run(self, edit, backwards=False):
        history.roll(backwards)
        self.view.erase(edit, sublime.Region(0, self.view.size()))
        self.view.insert(edit, 0, history.get())