markdown editor added

Author: kaliappan01

markdown_editor/README.md

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+# Markdown Editor
+
+The Markdown editor helps user to create, open, write, view and save markdown file.
+![implementation](md_editor.png)
+
+# modules used
+
+Tkinter
+markdown2
+tkhtmlview
+Setup and activate virtual environment :
+
+## For Unix based systems
+please execute the following command to create venv and install requirements.
+
+make init  
+source .venv/bin/activate  
+## For Windows based system
+
+pip install -r /path/to/requirements.txt
+# How to Use
+python3 markdown_viewer.py
+

markdown_editor/makefile

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+VENV ?= .venv
+REQUIREMENTS_FILE ?= requirements.txt
+
+init:
+	python3 -m venv $(VENV)
+	$(VENV)/bin/python -m pip install --upgrade pip
+	if [ -f $(REQUIREMENTS_FILE) ]; \
+	    then $(VENV)/bin/python -m pip install -r $(REQUIREMENTS_FILE); \
+    fi

markdown_editor/markdown_editor.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+import tkinter as tk
+from tkinter import Tk
+from tkinter import font, filedialog, messagebox as mbox
+
+from click import FileError
+from markdown2 import Markdown
+from tkhtmlview import HTMLLabel
+
+
+class Window(tk.Frame):
+    def __init__(self, master=None):
+        tk.Frame.__init__(self, master)
+        self.master = master
+        self.font = font.Font(family="Helvetica", size=14)
+        self.init_window()
+
+    def onChange(self, event):
+        self.inputeditor.edit_modified(0)
+        md2html = Markdown()
+        self.outputbox.set_html(md2html.convert(
+            self.inputeditor.get("1.0", tk.END)))
+
+    def openfile(self):
+        filename = filedialog.askopenfilename(
+            filetypes=[
+                ("Markdown File", "*.md *.mdown *markdown"),
+                ("Text file", "*.txt"),
+                ("All files", "*.*"),
+            ]
+        )
+        if filename:
+            try:
+                self.inputeditor.delete("1.0", tk.END)
+                self.inputeditor.insert(tk.END, open(filename, "r").read())
+            except FileError:
+                mbox.showerror(
+                    "Error opening file", "{} \
+                     cannot be opened !".format(
+                        filename
+                    ),
+                )
+
+    def savefile(self):
+        filedata = self.inputeditor.get("1.0", tk.END)
+        filename = filedialog.asksaveasfilename(
+            filetypes=(("Markdown file", "*.md"), ("Text file", "*.txt")),
+            title="Save Markdown File",
+        )
+        if filename:
+            try:
+                f = open(filename, "w")
+                f.write(filedata)
+            except FileError:
+                mbox.showerror("Error saving file", "Unable to save the file")
+
+    def init_window(self):
+        self.master.title("Mardown Viewer")
+        self.pack(fill=tk.BOTH, expand=1)
+
+        self.mainmenu = tk.Menu(self)
+        self.filemenu = tk.Menu(self.mainmenu)
+        self.filemenu.add_command(label="Open", command=self.openfile)
+        self.filemenu.add_command(label="Save as", command=self.savefile)
+        self.filemenu.add_separator()
+        self.filemenu.add_command(label="Exit", command=self.quit)
+        self.mainmenu.add_cascade(label="File", menu=self.filemenu)
+        self.master.config(menu=self.mainmenu)
+
+        self.inputeditor = tk.Text(self, width="1", font=self.font)
+        self.inputeditor.pack(fill=tk.BOTH, expand=1, side=tk.LEFT)
+        self.inputeditor.bind("<<Modified>>", self.onChange)
+
+        self.outputbox = HTMLLabel(
+            self, width="1", background="white",
+            html="<h1>Markdown Editor</h1>"
+        )
+        self.outputbox.pack(fill=tk.BOTH, expand=1, side=tk.RIGHT)
+
+
+root = Tk()
+root.geometry("750x600")
+app = Window(root)
+app.mainloop()

markdown_editor/md_editor.png

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+certifi==2022.9.24
+charset-normalizer==2.1.1
+idna==3.4
+markdown2==2.4.5
+Pillow==9.2.0
+requests==2.28.1
+tkhtmlview==0.1.1.post5
+urllib3==1.26.12