import re from dataclasses import dataclass from typing import Dict, List, Tuple from enum import Enum class Theme(Enum): """Available color themes""" DRACULA = "dracula" MONOKAI = "monokai" NORD = "nord" ONE_DARK = "one_dark" GITHUB_DARK = "github_dark" @dataclass class ColorScheme: """Color scheme for syntax highlighting""" background: str foreground: str comment: str keyword: str string: str number: str function: str class_name: str operator: str variable: str class SyntaxHighlighter: """ Syntax highlighter with support for multiple languages and themes """ # Theme definitions THEMES = { Theme.DRACULA: ColorScheme( background="#282a36", foreground="#f8f8f2", comment="#6272a4", keyword="#ff79c6", string="#f1fa8c", number="#bd93f9", function="#50fa7b", class_name="#8be9fd", operator="#ff79c6", variable="#f8f8f2" ), Theme.MONOKAI: ColorScheme( background="#272822", foreground="#f8f8f2", comment="#75715e", keyword="#f92672", string="#e6db74", number="#ae81ff", function="#a6e22e", class_name="#66d9ef", operator="#f92672", variable="#f8f8f2" ), Theme.NORD: ColorScheme( background="#2e3440", foreground="#d8dee9", comment="#616e88", keyword="#81a1c1", string="#a3be8c", number="#b48ead", function="#88c0d0", class_name="#8fbcbb", operator="#81a1c1", variable="#d8dee9" ), Theme.ONE_DARK: ColorScheme( background="#282c34", foreground="#abb2bf", comment="#5c6370", keyword="#c678dd", string="#98c379", number="#d19a66", function="#61afef", class_name="#e5c07b", operator="#c678dd", variable="#e06c75" ), Theme.GITHUB_DARK: ColorScheme( background="#0d1117", foreground="#c9d1d9", comment="#8b949e", keyword="#ff7b72", string="#a5d6ff", number="#79c0ff", function="#d2a8ff", class_name="#ffa657", operator="#ff7b72", variable="#ffa657" ) } # Language patterns PATTERNS = { 'python': { 'comment': r'#.*$', 'string': r'(["\'])(?:(?=(\\?))\2.)*?\1', 'keyword': r'\b(def|class|import|from|if|elif|else|for|while|return|try|except|with|as|lambda|yield|async|await|pass|break|continue|raise|assert|global|nonlocal|del|in|is|not|and|or)\b', 'function': r'\b([a-zA-Z_][a-zA-Z0-9_]*)\s*(?=\()', 'class': r'\bclass\s+([A-Z][a-zA-Z0-9_]*)', 'number': r'\b\d+\.?\d*\b', 'operator': r'[+\-*/%=<>!&|^~]+' }, 'javascript': { 'comment': r'//.*$|/\*[\s\S]*?\*/', 'string': r'(["\'])(?:(?=(\\?))\2.)*?\1|`[^`]*`', 'keyword': r'\b(var|let|const|function|class|if|else|for|while|return|try|catch|finally|async|await|import|export|from|default|new|this|typeof|instanceof|void|delete)\b', 'function': r'\b([a-zA-Z_$][a-zA-Z0-9_$]*)\s*(?=\()', 'class': r'\bclass\s+([A-Z][a-zA-Z0-9_]*)', 'number': r'\b\d+\.?\d*\b', 'operator': r'[+\-*/%=<>!&|^~?:]+' }, 'go': { 'comment': r'//.*$|/\*[\s\S]*?\*/', 'string': r'(["\'])(?:(?=(\\?))\2.)*?\1|`[^`]*`', 'keyword': r'\b(func|var|const|type|struct|interface|if|else|for|range|return|go|defer|package|import|switch|case|default|break|continue|select|chan|map)\b', 'function': r'\b([a-zA-Z_][a-zA-Z0-9_]*)\s*(?=\()', 'class': r'\btype\s+([A-Z][a-zA-Z0-9_]*)', 'number': r'\b\d+\.?\d*\b', 'operator': r'[+\-*/%=<>!&|^~:]+' } } def __init__(self, theme: Theme = Theme.DRACULA): """Initialize highlighter with theme""" self.theme = theme self.colors = self.THEMES[theme] def highlight(self, code: str, language: str = 'python') -> str: """ Highlight code with syntax colors Args: code: Source code to highlight language: Programming language (python, javascript, go, etc.) Returns: HTML string with colored syntax """ if language not in self.PATTERNS: return self._wrap_html(code) patterns = self.PATTERNS[language] tokens = self._tokenize(code, patterns) highlighted = self._apply_colors(tokens) return self._wrap_html(highlighted) def _tokenize(self, code: str, patterns: Dict[str, str]) -> List[Tuple[str, str]]: """Tokenize code into syntax elements""" tokens = [] lines = code.split('\n') for line in lines: pos = 0 line_tokens = [] while pos < len(line): matched = False # Try to match each pattern for token_type, pattern in patterns.items(): regex = re.compile(pattern, re.MULTILINE) match = regex.match(line, pos) if match: line_tokens.append((token_type, match.group(0))) pos = match.end() matched = True break # No match, treat as regular text if not matched: line_tokens.append(('text', line[pos])) pos += 1 tokens.append(line_tokens) return tokens def _apply_colors(self, tokens: List[List[Tuple[str, str]]]) -> str: """Apply color scheme to tokens""" result = [] color_map = { 'comment': self.colors.comment, 'string': self.colors.string, 'keyword': self.colors.keyword, 'function': self.colors.function, 'class': self.colors.class_name, 'number': self.colors.number, 'operator': self.colors.operator, 'text': self.colors.foreground } for line_tokens in tokens: line_html = [] for token_type, text in line_tokens: color = color_map.get(token_type, self.colors.foreground) line_html.append(f'{self._escape_html(text)}') result.append(''.join(line_html)) return '\n'.join(result) def _wrap_html(self, content: str) -> str: """Wrap highlighted code in HTML with theme background""" return f'''

            {content}

''' def _escape_html(self, text: str) -> str: """Escape HTML special characters""" return (text.replace('&', '&') .replace('<', '<') .replace('>', '>') .replace('"', '"') .replace("'", ''')) def set_theme(self, theme: Theme): """Change color theme""" self.theme = theme self.colors = self.THEMES[theme] # Example usage if __name__ == "__main__": # Sample Python code python_code = ''' def calculate_fibonacci(n: int) -> int: """Calculate nth Fibonacci number""" if n <= 1: return n return calculate_fibonacci(n-1) + calculate_fibonacci(n-2) class MathHelper: def __init__(self, name: str): self.name = name def greet(self): print(f"Hello from {self.name}!") # Create instance helper = MathHelper("Snippify") result = calculate_fibonacci(10) ''' # Highlight with different themes for theme in Theme: highlighter = SyntaxHighlighter(theme) html_output = highlighter.highlight(python_code, 'python') print(f"\n{'='*50}") print(f"Theme: {theme.value}") print(f"{'='*50}") print(html_output) # JavaScript example js_code = ''' const fetchUserData = async (userId) => { try { const response = await fetch(`/api/users/${userId}`); const data = await response.json(); return data; } catch (error) { console.error("Failed to fetch:", error); return null; } }; class User { constructor(name, age) { this.name = name; this.age = age; } } ''' highlighter = SyntaxHighlighter(Theme.DRACULA) print("\n" + highlighter.highlight(js_code, 'javascript'))

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Syntax Highlighter with Multiple Themes

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