c运算符自动加空格

import sublime, sublime_plugin
req_single_op_all = '(([\+\-\*/%=<>\|&\^\?]|(<<)|(>>))(=)|(!=))|((?<=[\w ])((<<)|(>>)|(&&)|(\|\|)|[\+\-\*/%=<>\|&\^\?])(?=[\w ]))'
#这个正则表达式匹配:
#+ - * / % = < > | & ^ ? << >> && || != += -= *= /= %= &= ^= |= <<= >>= 
reg_tri_op = '\?[\w ]*:'
#三目运算符?:,需要特殊处理,因为':'号在switc case语句中前后不需要加空格
reg_comma = '(,|;)(?=[\w])'
#','';'运算符,需要特殊处理,因为一般','';'前面不加空格,而后面加空格
char_to_ins = ' '
 
class OpUnit:
    subplg = None
    subedit = None
    def __init__(self, regex, ins_func):
        self.regex = regex
        self.ins_func = ins_func
 
    #对于一般的运算符,前后都要加空格    
    @staticmethod
    def singleOpInsert(begin, end):
        view = OpUnit.subplg.view
        edit = OpUnit.subedit
        if view.substr(begin - 1) != char_to_ins:  
            view.insert(edit, begin, char_to_ins)
            if view.substr(end + 1) != char_to_ins: 
                view.insert(edit, end + 1, char_to_ins)
        elif view.substr(end) != char_to_ins:  
            view.insert(edit, end, char_to_ins)
 
    #对于三目运算符,?号前后不加空格(因为已经在匹配普通运算符时加了空格),':'号前后才加空格
    @staticmethod
    def triOpInsert(begin, end):  
        view = OpUnit.subplg.view
        edit = OpUnit.subedit
        if view.substr(end - 2) != char_to_ins:     
            view.insert(edit, end - 1, char_to_ins)
            if view.substr(end + 1) != char_to_ins:
                view.insert(edit, end + 1, char_to_ins)
        elif view.substr(end) != char_to_ins:
            view.insert(edit, end, char_to_ins)
 
    #对于','';'运算符,只在后面加空格
    @staticmethod
    def commaOpInsert(begin, end):  
        view = OpUnit.subplg.view
        edit = OpUnit.subedit
        if view.substr(end) != char_to_ins:
            view.insert(edit, end, char_to_ins)
 
op_units = (OpUnit(req_single_op_all, OpUnit.singleOpInsert), 
            OpUnit(reg_tri_op, OpUnit.triOpInsert), 
            OpUnit(reg_comma, OpUnit.commaOpInsert))
 
class InsertSpaceCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        cur_region = self.view.sel()[0] 
        (cur_row,cur_col) = self.view.rowcol(cur_region.end()) #获得当前光标所在位置的行列
        OpUnit.subplg = self
        OpUnit.subedit = edit
        for op in op_units: 
            regex = op.regex
            op_func = op.ins_func
            #find函数会找到start_pos后第一个匹配正则表达式的region,
            start_pos = self.view.text_point(cur_row , 0)  
            matched_region = self.view.find(regex, start_pos)
            (row, col) = self.view.rowcol(matched_region.end())
            while row == cur_row: #如果匹配到的文本已经不再当前行,则不再匹配
                begin = matched_region.begin()
                end = matched_region.end()
                if begin < 0 or end < 0:
                    break;
                op_func(begin,end) 
                start_pos = end + 1
                matched_region = self.view.find(regex, start_pos)
                (row, col) = self.view.rowcol(matched_region.end())
        self.view.run_command("insert", {"characters": "\n"}) 
 
 
#最后需要插入一个换行符, 因为这是与enter键绑定的,它覆盖了默认的一个enter键绑定,所以要手动插入换行