gistfile1.json

[
    { "keys": ["ctrl+p"], "command": "previous_keyword_match", "context":
        [
            { "key": "auto_complete_visible", "operator": "equal", "operand": true }
        ]
    },
    { "keys": ["ctrl+n"], "command": "next_keyword_match" }
]

keyword_match.py

import sublime_plugin


class PreviousKeywordMatchCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        view = self.view
        initial_word_region = view.word(view.sel()[0])
        initial_pos = initial_word_region.a
        word = view.substr(initial_word_region)
        wrapped = False
        position = initial_word_region.begin() - 1
        size_checked = 0
        while size_checked < 5000 and not (wrapped and position < initial_pos):
            compare_word_region = view.word(position)
            compare_word = view.substr(compare_word_region)
            if compare_word.startswith(word):
                view.replace(edit, initial_word_region, compare_word)
                break
            position = compare_word_region.begin() - 1
            size_checked += compare_word_region.size()
            if position == -1:
                position = view.size()
                wrapped = True

class NextKeywordMatchCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        view = self.view
        initial_word_region = view.word(view.sel()[0])
        initial_pos = initial_word_region.a
        word = view.substr(initial_word_region)
        wrapped = False
        position = initial_word_region.end() + 1
        size_checked = 0
        while size_checked < 5000 and not (wrapped and position > initial_pos):
            compare_word_region = view.word(position)
            compare_word = view.substr(compare_word_region)
            if compare_word.startswith(word):
                view.replace(edit, initial_word_region, compare_word)
                break
            position = compare_word_region.end() + 1
            size_checked += compare_word_region.size()
            if position > view.size():
                position = 0
                wrapped = True