An ST plugin to move the active buffer's tab left and right on the tab bar.

MoveTabInGroup.py

#
# Name:          MoveTabInGroup
# Requirements:  Plugin for Sublime Text v2 and v3
# Written by:    mattst - https://github.com/mattst
# ST Command:    move_tab_in_group
# Arg Required:  direction: "left" or "right"
# Description:   An ST plugin to move the active buffer's
#                tab left and right on the tab bar.
#

import sublime
import sublime_plugin

class MoveTabInGroupCommand(sublime_plugin.WindowCommand):
    """
    An ST plugin to move the active buffer's tab left and right on the tab bar.
    """

    def run(self, direction):

        active_sheet = self.window.active_sheet()

        if not active_sheet:
            return

        group, tab_pos = self.window.get_sheet_index(active_sheet)
        num_tabs_in_group = len(self.window.sheets_in_group(group))

        if tab_pos < 0 or num_tabs_in_group < 2:
            return

        elif direction == "left":
            new_tab_pos = tab_pos - 1
            if new_tab_pos < 0:
                new_tab_pos = num_tabs_in_group - 1

        elif direction == "right":
            new_tab_pos = tab_pos + 1
            if new_tab_pos >= num_tabs_in_group:
                new_tab_pos = 0

        else:
            return

        self.window.set_sheet_index(active_sheet, group, new_tab_pos)