x01.editor: 语法高亮编辑器

学习《Tkinter GUI Programming By Example》时，发现了语法高亮编辑器和聊天程序还不错。语法高亮编辑器如下，聊天程序可在下载中获取。

1. 效果图

2. 代码

import os, sys
CurrDir = os.path.dirname(__file__)
sys.path.append(CurrDir)

import tkinter as tk 
import tkinter.ttk as ttk 
import tkinter.messagebox as msgbox 
import itertools 

from tkinter import filedialog

from editor.core import TextArea, LineNumbers, FindWindow, Highlighter, R 

class MainWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("x01.editor")

        self.text_area = TextArea(self, bg="white", fg="black", undo=True)

        self.scrollbar = ttk.Scrollbar(orient="vertical", command=self.scroll_text)
        self.text_area.configure(yscrollcommand=self.scrollbar.set)

        self.line_numbers = LineNumbers(self, self.text_area,width=1, bg="grey", fg="white")
        self.highlighter = Highlighter(self.text_area, os.path.join(CurrDir,'languages/python.yaml'))

        self.scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self.line_numbers.pack(side=tk.LEFT, fill=tk.Y)
        self.text_area.pack(side=tk.LEFT, fill=tk.BOTH, expand=1)

        self.bind_events()

        self.background = 'lightgrey'
        self.foreground = 'black'
        self.menu = tk.Menu(self, bg=self.background, fg=self.foreground)
        self.generate_menus(['file', 'help']) #'edit','tools','help'])
        self.configure(menu=self.menu)

        self.open_file = ''

        self.yaml_config()
        R.win_center(self)

    def yaml_config(self):
        config = R.load_config(os.path.join(CurrDir, 'config.yaml'))
        self.text_area.configure(font=(config['font_family'], config['font_size']))
        self.line_numbers.configure(font=(config['font_family'], config['font_size']))

    def bind_events(self):
        self.text_area.bind("<MouseWheel>", self.scroll_text)
        self.text_area.bind("<Button-4>", self.scroll_text)
        self.text_area.bind("<Button-5>", self.scroll_text)

        self.line_numbers.bind("<MouseWheel>", lambda e: "break")
        self.line_numbers.bind("<Button-4>", lambda e: "break")
        self.line_numbers.bind("<Button-5>", lambda e: "break")

        self.bind('<Control-f>', self.show_find_window)
        self.bind("<Control-n>", self.file_new)
        self.bind('<Control-o>', self.file_open)
        self.bind('<Control-s>', self.file_save)
        self.bind('<Alt-s>', self.file_saveas)
        self.bind('<Control-h>', self.help_about)

    def scroll_text(self, *args):
        if len(args) > 1:
            self.text_area.yview_moveto(args[1])
            self.line_numbers.yview_moveto(args[1])
        else:
            event = args[0]
            if event.delta:
                move = -1 * (event.delta / 120)
            else:
                if event.num == 5:
                    move = 1
                else:
                    move = -1

            self.text_area.yview_scroll(int(move), "units")
            self.line_numbers.yview_scroll(int(move) * 3, "units")

    def show_find_window(self, event=None):
        FindWindow(self.text_area)

    def generate_menus(self, items):
        win_methods = [method_name for method_name in dir(self) if callable(getattr(self, method_name))]
        tk_methods = [method_name for method_name in dir(tk.Tk) if callable(getattr(tk.Tk, method_name))]
        methods = [m for m in set(win_methods) - set(tk_methods)]
        methods = sorted(methods)
        for item in items:
            sub_menu = tk.Menu(self.menu, tearoff=0, bg=self.background, fg=self.foreground)
            match_methods = []
            for m in methods:
                if m.startswith(item):
                    match_methods.append(m)
            for m in match_methods:
                actual_method = getattr(self, m)
                shortcut = actual_method.__doc__.strip()
                name = ' '.join(m.split('_')[1:])
                sub_menu.add_command(label=name.title(), command=actual_method, accelerator=shortcut)
            self.menu.add_cascade(label=item.title(), menu=sub_menu)

    def file_new(self, event=None):
        '''
        Ctrl+N
        '''
        self.text_area.delete(1.0, tk.END)
        self.open_file = None 
        self.line_numbers.force_update()

    def file_open(self, event=None):
        '''
        Ctrl+O
        '''
        types = (('python files', '*.py'), ('All files', '*.*'))
        filename = filedialog.askopenfilename(title='x01.editor', filetypes=types)
        if filename:
            self.open_file = filename
            self.text_area.display_file_contents(filename)
            self.highlighter.highlight()
            self.line_numbers.force_update()

    def file_save(self, event=None):
        '''
        Ctrl+S
        '''
        f = self.open_file if self.open_file else None
        if f is None:
            types = (('python files', '*.py'), ('All files', '*.*'))
            f = filedialog.asksaveasfilename(title='x01.editor', filetypes=types)
        if f:
            contents = self.text_area.get(1.0, tk.END)
            with open(f, 'w') as file:
                file.write(contents)

    def file_saveas(self, event=None):
        '''
        Alt+S
        '''
        types = (('python files', '*.py'), ('All files', '*.*'))
        f = filedialog.asksaveasfilename(title='x01.editor', filetypes=types)
        if f:
            contents = self.text_area.get(1.0,tk.END)
            with open(f, 'w') as file:
                file.write(contents)

    def help_about(self, event=None):
        '''
        Ctrl+H
        '''
        msgbox.showinfo("About", "x01.editor 语法高亮编辑器")
        pass

if __name__ == '__main__':
    mw = MainWindow()
    mw.mainloop()

main