为什么我添加太多匹配后我的代码会崩溃

Question

我正在做一个代码编辑器，想要语法高亮。我已经完成了所有代码，一旦我添加了太多匹配项，它就会崩溃。

我有一个

python.yaml

正则表达式文件，以及

syntaxHighliter.py

其中包含 higlighter 类。如果有帮助，我将在项目的其余部分使用名为 customtkinter 的 tkinter 修改版本。

python.yaml:

categories:
  built-in-constants:
    color: '#ec5f66'
    matches: ['True', 'False', 'None', 'self']
  keywords:
    color: '#c695c6'
    matches: ['try', 'except', 'if', 'else', 'elif', 'def', 'import']
  functions:
    color: blue4
    matches: [] #[int, str, dict, list, set, float]
    
numbers:
  color: '#f9ae58'
strings:
  color: '#99c794'

syntaxHighliter.py:

import tkinter as tk
import yaml
from yaml import CLoader as Loader

class Highlighter:
    def __init__(self, text_widget, syntax_file):
        self.text_widget = text_widget
        self.syntax_file = syntax_file
        self.categories = None
        self.disallowed_previous_chars = ["_", "-", "."]

        self.parse_syntax_file()

        self.text_widget.bind('<KeyRelease>', self.on_key_release)

    def on_key_release(self, event=None):
        self.highlight()

    def highlight(self, event=None):
        length = tk.IntVar()

        for category in self.categories:
            matches = self.categories[category]['matches']
            print(f"Scanning category: {category}. Matches are: {matches}")
            for keyword in matches:
                start = 1.0
                keyword = keyword + "[^A-Za-z_-]"
                idx = self.text_widget.search(keyword, start, stopindex=tk.END, count=length, regexp=1)
                
                while idx:
                    char_match_found = int(str(idx).split('.')[1])
                    line_match_found = int(str(idx).split('.')[0])
                    if char_match_found > 0:
                        previous_char_index = str(line_match_found) + '.' + str(char_match_found - 1)
                        previous_char = self.text_widget.get(previous_char_index, previous_char_index + "+1c")
                        
                        if previous_char.isalnum() or previous_char in self.disallowed_previous_chars:
                            print(f"There was an illegal character before this word ({category}, idx= {idx}, end= {end}), so nothing was tagged")
                            end = f"{idx}+{length.get() - 1}c"
                            start = end
                            idx = self.text_widget.search(keyword, start, stopindex=tk.END, regexp=1)
                        else:
                            end = f"{idx}+{length.get() - 1}c"
                            self.text_widget.tag_add(category, idx, end)
                            start = end
                            idx = self.text_widget.search(keyword, start, stopindex=tk.END, regexp=1)
                            print(f"Found: {category}, at index: {idx}, to {end}")

                start = 1.0
                idx = self.text_widget.search(r"(\d)+[.]?(\d)*", start, stopindex=tk.END, regexp=1, count=length)

                while idx:
                    end = f"{idx}+{length.get()}c"
                    self.text_widget.tag_add(category, idx, end)
                    start = end
                    idx = self.text_widget.search(r"(\d)+[.]?(\d)*", start, stopindex=tk.END, regexp=1, count=length)
            
            self.highlight_regex(r"[\'][^\']*[\']", "string")
            self.highlight_regex(r"[\"][^\']*[\"]", "string")


    def highlight_regex(self, regex, tag):
        # Highlights regular expressions, FUNCTION CHECKED AND WORKING (for strings, at least)
        length = tk.IntVar()
        start = 1.0
        idx = self.text_widget.search(regex, start, stopindex=tk.END, regexp=1, count=length)

        while idx:
            end = f"{idx}+{length.get()}c"
            self.text_widget.tag_add(tag, idx, end)
            start = end
            idx = self.text_widget.search(regex, start, stopindex=tk.END, regexp=1, count=length)

    def parse_syntax_file(self):
        with open(self.syntax_file, 'r') as stream:
            try:
                config = yaml.load(stream, Loader=Loader)
            except yaml.YAMLError as error:
                print(error)
                return
        self.categories = config['categories']
        self.numbers_color = config['numbers']['color']
        self.strings_color = config['strings']['color']

        self.configure_tags()

    def configure_tags(self):
        for category in self.categories.keys():
            color = self.categories[category]['color']
            self.text_widget.tag_configure(category, foreground=color)

        self.text_widget.tag_configure("number", foreground=self.numbers_color)
        self.text_widget.tag_configure("string", foreground=self.strings_color)

当我取消注释

python.yaml

中的注释行或添加另一个匹配项时，整个应用程序冻结。