sublime中编写Markdown文件自动添加行尾空格换行

sublime中编写Markdown文件自动添加行尾空格换行

作用

我们在写Markdown的时候，换行并不会生效，会自动连接起来，除非在后面添加两个空格，或者是两个换行。
所以，我想在保存文件的时候，自动在后面添加两个空格。当然，这个只需要在文章段落，以及列表中生效，其他的，比如标题或者代码块就不需要。

代码

import sublime
import sublime_plugin

import re

class MarkdownAutolineListener(sublime_plugin.EventListener):
    def on_pre_save(self, view):
        if view and view.syntax().name == 'Markdown':
            view.run_command("markdown_autoline")


class MarkdownAutolineCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        region = sublime.Region(0, self.view.size())
        content = self.view.substr(region)
        line_regions = self.view.lines(region)
        region_num = len(line_regions)
        sel_rows = self.get_sel_rows()
        sep = self.get_sep()
        lines = content.split(sep)
        new_content = ''
        row = 0
        for line in lines:
            if row != 0:
                new_content += sep
            new_content += line
            # skip: 1. lines already added 2 spaces; 2. last empty line; 3. lines with cursors; 4. empty/space lines
            if not(line.endswith('  ')) and row < region_num and row not in sel_rows and not re.match(r'^[ \t]*$', line):
                scope_name = self.view.scope_name(line_regions[row].begin())
                if re.match(r'.*(paragraph.markdown|markup.list)', scope_name):
                    if line.endswith(' '): # add 1 space
                        new_content += ' '
                    else: # add 2 spaces
                        new_content += '  '
            row += 1

        # change once, easy to undo, if not changed don't replace
        if content != new_content:
            self.view.replace(edit, region, new_content)

    def get_sep(self):
        endings = self.view.line_endings()
        if endings == 'unix':
            sep = '\n'
        elif endings == 'windows':
            sep = '\n\r'
        else:
            sep = '\n'
        return sep

    def get_sel_rows(self):
        sels = self.view.sel()
        rows = []
        for s in sels:
            rows.append(self.view.rowcol(s.begin())[0])
        return rows