# -*- coding: utf-8 -*-

import sublime
import sublime_plugin

_KEY = 'marking_changed'
_MARK_STYLE = sublime.DRAW_NO_FILL | sublime.DRAW_NO_OUTLINE | sublime.HIDDEN
_SCOPE = 'markup.deleted'
_SCOPE_SAVED = 'markup.inserted'
_KEY_SAVED = 'changed_saved'

settings2 = sublime.load_settings("MarkChanges.sublime-settings")
_ICON = "dot"

class MarkingChangedRowsCommand(sublime_plugin.EventListener):

    def __init__(self):
        self.changed_lines = []
        self.saved_lines = []

    def on_modified(self, view):
        if not view.file_name():
            return

        if view.is_dirty():
            for sel in view.sel():
                for r in view.lines(sel):
                    ln, _ = view.rowcol(r.begin())

                    if ln in self.saved_lines:
                        self.saved_lines.remove(ln)

                    if not ln in self.changed_lines:
                        self.changed_lines.append(ln)

            self.display_saved_regions(view)
            self.display_changed_regions(view)
        else:
            view.erase_regions(_KEY);

    def on_post_save(self, view):
        view.erase_regions(_KEY)


        for ln in self.changed_lines:
            self.saved_lines.append(ln)
        self.changed_lines = []

        self.display_saved_regions(view)

    def on_load(self, view):
        view.erase_regions(_KEY)


    def display_saved_regions(self, view):
        view.erase_regions(_KEY_SAVED)
        rgns = []
        for ln in self.saved_lines:
            a = view.text_point(ln, 0)
            r = sublime.Region(a, a)
            rgns.append(r)
        view.add_regions(_KEY_SAVED, rgns, _SCOPE_SAVED, _ICON, _MARK_STYLE)

    def display_changed_regions(self, view):
        view.erase_regions(_KEY);
        rgns = []
        for ln in self.changed_lines:
            a = view.text_point(ln, 0)
            r = sublime.Region(a, a)
            rgns.append(r)
        view.add_regions(_KEY, rgns, _SCOPE, _ICON, _MARK_STYLE)