converter.py

import re
import database_host
import tkinter as tk
import tkinter.font as tkfont

color1 = 'gray30'
color2 = 'gray15'
color3 = 'white'
if database_host.get_setting('theme') == 'light':
    color1 = 'gray85'
    color2 = 'gray70'
    color3 = 'black'
def update_convtheme():
    global color1, color2, color3
    color1 = 'gray30'
    color2 = 'gray15'
    color3 = 'white'
    if database_host.get_setting('theme') == 'light':
        color1 = 'gray85'
        color2 = 'gray70'
        color3 = 'black'

def parsed_to_readable(parsed_text, escape_positions, textbox):
    split_text = parsed_text.split("(newline)")
    ordered_list_num = 0
    line_num = 0
    skip = False
    codeblock = False
    
    for line in split_text:
        count = 0
        line_escape_pos = escape_positions[line_num]
        font_size = None
        
        # Headings
        heading_level = None
        for i in range(1, 7):
            if line.startswith(f"(h{i})"):
                heading_level = i
                break
        
        match heading_level:
            case 1:
                font_size = 22
            case 2:
                font_size = 18
            case 3:
                font_size = 16
            case 4:
                font_size = 14
            case 5:
                font_size = 12
            case 6:
                font_size = 11
            case None:
                font_size = 14
        
        # Calculate the number of characters that can fit on a line
        pixel_width = textbox.winfo_width()
        font_obj = tkfont.Font(font=("Arial", font_size))
        space_width = font_obj.measure(' ')
        textbox_width = pixel_width / space_width
        count_length = int(textbox_width)
        
        if heading_level:
            heading = "h"
            bold = "bold"
            line = line[4:]
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 4
        else:
            heading = "r"
            font_size = 14
            bold = ""
        
        # Code Block
        if line.startswith("(cb)"):
            line = ""
            skip = True
            if codeblock == False:
                codeblock = True
            else:
                codeblock = False
        
        # Ordered list
        textbox.tag_configure("ordered", font=("Arial", 14))
        if line.startswith("(ol)"):
            ordered_list_num += 1
            list_prefix = str(ordered_list_num) + ". "
            line = list_prefix + line[4:]  # Prepend the number to the line instead of separate insert
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure(list_prefix)
            indent = char_width / space_width
            count_length -= indent
            count -= 2
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 4
        else:
            ordered_list_num = 0
        
        # Unordered list
        textbox.tag_configure("bullet", font=("Arial", 14, "bold"))
        if line.startswith("(ul)"):
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure(" " + u"\u2022" + " ")
            indent = char_width / space_width
            count_length -= indent
            count += 1
            textbox.insert(tk.END, " " + u"\u2022" + " ", "bullet")
            line = line[4:]
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 4
        
        # Blockquote
        blockquote_tag = "blockquote" + str(font_size)
        textbox.tag_configure(blockquote_tag, font=("Arial", font_size), background = "gray20")
        if line.startswith("(bq)"):
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure("  ")
            indent = char_width / space_width
            count_length -= indent
            textbox.insert(tk.END, " ", blockquote_tag)
            line = " " + line[4:]
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 3
            
        # Unchecked box
        textbox.tag_configure("unchecked", font=("Arial", 14))
        if line.startswith("(unchecked)"):
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure(u"\u2610" + " ")
            indent = char_width / space_width
            count_length -= indent
            count += 2
            textbox.insert(tk.END, u"\u2610" + " ", "unchecked")
            line = line[11:]
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 11
        
        # Checked box
        textbox.tag_configure("checked", font=("Arial", 14))
        if line.startswith("(checked)"):
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure(u"\u2611" + " ")
            indent = char_width / space_width
            count_length -= indent
            count += 2
            textbox.insert(tk.END, u"\u2611" + " ", "unchecked")
            line = line[9:]
            for j in range(len(line_escape_pos)):
                line_escape_pos[j - 1] -= 9
        
        # Links
        # NOTE: Links do not actually link to any website yet
        link_addresses = []
        link_characters = []
        
        while True:
            match = re.search(r"(\(l\))(\(name\))(.+?)(\(address\))(.+?)(\(l\))", line)
            if not match:
                break
            link_addresses.append(match.group(5))
            start, end = match.span()
            name = match.group(3)
            line = line[:start] + name + line[end:]
            start, end = match.span(3)
            link_characters.extend(i for i in range(start - 8, end - 8))
        
        # Bold
        bold_indices = []
        bold_characters = []
        matches = re.finditer(r"(\(b\))(.+?)(\(b\))", line)
        
        end_subtract = 6
        start_subtract = 0
        sr = 0
        er = 0
        
        for match in matches:
            start, end = match.span()
            bold_indices.append(start - start_subtract)
            bold_indices.append(end - end_subtract)
            for i in range(len(link_characters)):
                if link_characters[i - 1] > start - start_subtract:
                    link_characters[i - 1] -= 3
                if link_characters[i - 1] > end - end_subtract:
                    link_characters[i - 1] -= 3
            for j in range(len(line_escape_pos)):
                if line_escape_pos[j - 1] > end:
                    line_escape_pos[j - 1] -= 6
                elif line_escape_pos[j - 1] > start:
                    line_escape_pos[j - 1] -= 3
            bold_characters.extend([i for i in range(start + 1 - start_subtract, end + 1 - end_subtract)])
            start_subtract = start_subtract + 6
            end_subtract = end_subtract + 6
            line = line[:start - sr] + line[start + 3 - sr:end - 3 - er] + line[end - er:]
            er += 6
            sr += 6
          
        # Italic
        italic_indices = []
        italic_characters = []
        matches = re.finditer(r"(\(i\))(.+?)(\(i\))", line)
        
        end_subtract = 6
        start_subtract = 0
        sr = 0
        er = 0
        
        for match in matches:
            start, end = match.span()
            italic_indices.append(start - start_subtract)
            italic_indices.append(end - end_subtract)
            for i in range(len(bold_characters)):
                if bold_characters[i - 1] > start - start_subtract:
                    bold_characters[i - 1] -= 3
                if bold_characters[i - 1] > end - end_subtract:
                    bold_characters[i - 1] -= 3
            for i in range(len(link_characters)):
                if link_characters[i - 1] > start - start_subtract:
                    link_characters[i - 1] -= 3
                if link_characters[i - 1] > end - end_subtract:
                    link_characters[i - 1] -= 3
            for j in range(len(line_escape_pos)):
                if line_escape_pos[j - 1] > end:
                    line_escape_pos[j - 1] -= 6
                elif line_escape_pos[j - 1] > start:
                    line_escape_pos[j - 1] -= 3
            italic_characters.extend([i for i in range(start + 1 - start_subtract, end + 1 - end_subtract)])
            start_subtract = start_subtract + 6
            end_subtract = end_subtract + 6
            line = line[:start - sr] + line[start + 3 - sr:end - 3 - er] + line[end - er:]
            er += 6
            sr += 6
                        
        # Inline Code Block
        inlinecode_indices = []
        inlinecode_characters = []
        matches = re.finditer(r"(\(ic\))(.+?)(\(ic\))", line)

        end_subtract = 8
        start_subtract = 0
        sr = 0
        er = 0

        for match in matches:
            start, end = match.span()
            inlinecode_indices.append(start - start_subtract)
            inlinecode_indices.append(end - end_subtract)
            for i in range(len(bold_characters)):
                if bold_characters[i - 1] > start - start_subtract:
                    bold_characters[i - 1] -= 4
                if bold_characters[i - 1] > end - end_subtract:
                    bold_characters[i - 1] -= 4
            for i in range(len(italic_characters)):
                if italic_characters[i - 1] > start - start_subtract:
                    italic_characters[i - 1] -= 4
                if italic_characters[i - 1] > end - end_subtract:
                    italic_characters[i - 1] -= 4
            for i in range(len(link_characters)):
                if link_characters[i - 1] > start - start_subtract:
                    link_characters[i - 1] -= 4
                if link_characters[i - 1] > end - end_subtract:
                    link_characters[i - 1] -= 4
            for j in range(len(line_escape_pos)):
                if line_escape_pos[j - 1] > end:
                    line_escape_pos[j - 1] -= 8
                elif line_escape_pos[j - 1] > start:
                    line_escape_pos[j - 1] -= 4
            inlinecode_characters.extend([i for i in range(start + 1 - start_subtract, end + 1 - end_subtract)])
            start_subtract = start_subtract + 8
            end_subtract = end_subtract + 8
            line = line[:start - sr] + line[start + 4 - sr:end - 4 - er] + line[end - er:]
            er += 8
            sr += 8

        # Adding characters to textbox
        char_num = 0 # Create a variable to store what number character on the line it is up to
        for char in line:
            space_width = font_obj.measure(' ')
            char_width = font_obj.measure(char)
            count += char_width / space_width
            if count >= count_length:
                beginning_tag = f"{font_size}"
                textbox.tag_configure(beginning_tag, font=("Arial", font_size))
                textbox.insert(tk.END, "\n")
                textbox.insert(tk.END, " " * int(indent), beginning_tag)
                count = (char_width / space_width) * 2
                
            char_num = char_num + 1
            
            if char_num in bold_characters or heading == "h":
                bold = ",bold"
            else:
                bold = ","
            
            if char_num in italic_characters:
                italic = ",italic"
            else:
                italic = ","
            
            if char_num in inlinecode_characters:
                backgrounds = "gray45"
                if heading == "r":
                    bold = ","
                else:
                    bold = ",bold"
                italic = ","
            else:
                backgrounds = color1
            
            if char_num in link_characters:
                foregrounds = "#0291E3"
                underlines = True
                tag = "true"
            else:
                foregrounds = color3
                underlines = False
                tag = "false"
            
            if codeblock == True:
                backgrounds = "lightgray"
                foregrounds = "black"
                bold = ","
                italic = ","
                underlines = False
                tag = "false"
            
            # Tag name is a combination of all changes
            tag_name = heading + str(font_size) + bold + italic + "," + backgrounds + "," + foregrounds + "," + tag
            
            if bold == ",bold" and italic == ",italic":
                textbox.tag_configure(tag_name, font=("Arial", font_size, "bold", "italic"), background = backgrounds, foreground = foregrounds, underline = underlines)
            elif bold == ",bold":
                textbox.tag_configure(tag_name, font=("Arial", font_size, "bold"), background = backgrounds, foreground = foregrounds, underline = underlines)
            elif italic == ",italic":
                textbox.tag_configure(tag_name, font=("Arial", font_size, "italic"), background = backgrounds, foreground = foregrounds, underline = underlines)
            else:
                textbox.tag_configure(tag_name, font=("Arial", font_size), background = backgrounds, foreground = foregrounds, underline = underlines)
            
            if char_num - 1 not in line_escape_pos:
                textbox.insert(tk.END, char, tag_name)
        if skip == False:
            textbox.insert(tk.END, "\n")
        else:
            skip = False
        
        line_num += 1