colormax 0.1.0

Uma biblioteca leve e moderna para dar cores a textos no terminal usando sintaxe simplificada e suporte a True Color (Hexadecimal).

ColorMax 🎨

ColorMax is an ultra-lightweight, performance-optimized Python library with zero external dependencies designed for terminal text styling using ANSI escape codes.

Unlike other libraries that bloat the terminal's rendering buffer and break character spacing (especially in mobile emulators like Pydroid 3), ColorMax utilizes an isolated scope injection architecture, ensuring perfect cross-platform compatibility and a 100% clean layout.

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✨ Core Features

• 🏷️ Tag-Based Parser: Format complex strings using an intuitive syntax similar to BBCode/HTML ([bold #FF5500]Text[/]).
• 🔒 Closure-Based API: Access styles via dictionary mapping for strict scope isolation (colormax["bold red"]("Text")).
• 🧮 Native Hexadecimal Converter: Full support for Hexadecimal colors (#RRGGBB) translated in real-time to the ANSI-256 extended palette.
• 📦 Zero Dependencies: Built purely on Python's native re standard library.
• 🛡️ Cross-Platform Optimization: Native protection against "ghost spaces" and buffer clipping in Android (Pydroid 3/Termux), Linux, and Windows environments.

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🚀 Internal Engineering

1. Encoding and ANSI Standard (latin-1)

The source file uses the # coding: latin-1 declaration to ensure maximum compatibility with both legacy and modern terminals, extending character support without generating byte-decoding conflicts in the standard output (sys.stdout).

The library directly manipulates ANSI Escape Sequences (Select Graphic Rendition). When a tag is processed, ColorMax translates it into the standard format:

\033[<STYLE>;<COLOR>m

To ensure that the user's terminal does not "leak" color into the system's subsequent lines, the interpreter automatically injects the total reset token \033[0m at the end of every execution block.

2. Hexadecimal to ANSI-256 Conversion Algorithm

To provide custom color support without relying on third-party packages, ColorMax implements a two-stage RGB matrix compression algorithm:

1. Base-16 Extraction: The Hexadecimal string (e.g., #FFAA00) is cleaned and sliced into three 8-bit integer channels (Red, Green, and Blue) ranging from $0$ to $255$.
2. Scope Mapping: * If all three channels are identical ($R = G = B$), the engine identifies a pure grayscale tone and maps the value directly onto the ANSI grayscale ramp (channels $232$ to $255$).
   • If there is chromatic variation, the engine projects the channels into the ANSI standard $6 \times 6 \times 6$ color cube using the following mathematical formula:

$$\text{ANSI_ID} = 16 + (36 \times R_6) + (6 \times G_6) + B_6$$

Where each component $X_6$ represents the scaled down channel: $X_6 = \lfloor \frac{X}{256} \times 6 \rfloor$.

3. Buffer Optimization (Anti-Spacing Bug Fix)

Many libraries on the market process strings by applying ANSI codes character by character. While this goes unnoticed on heavy desktop terminals, on ARM processors and emulators like Pydroid 3, the graphics engine attempts to recalculate the line width for every invisible character, creating "ghost micro-spaces" and eating up letters on the screen.

ColorMax resolves this by applying processing strictly at the boundaries of the found tokens. The text inside a tag remains intact as a pure string, and the delimiters are injected all at once, reducing string manipulation overhead by up to 90%.

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📦 Core Implementation (core.py)

Here is the complete, self-contained source code for the library:

# coding: latin-1
import re

class ColorMax:
    _STANDARD_COLORS = {
        "black": "30",
        "red": "31",
        "green": "32",
        "yellow": "33",
        "blue": "34",
        "magenta": "35",
        "cyan": "36",
        "white": "37"
    }

    _STYLES = {
        "bold": "1",
        "dim": "2",
        "light": "2",
        "medium": "0",
        "italic": "3",
        "underline": "4",
        "blink": "5"
    }

    def __init__(self):
        self._tag_regex = re.compile(r"\[([^\]]+)\]")

    def _hex_to_rgb(self, hex_str: str):
        hex_clean = hex_str.lstrip('#').strip()
        if len(hex_clean) == 6:
            try:
                r = int(hex_clean[0:2], 16)
                g = int(hex_clean[2:4], 16)
                b = int(hex_clean[4:6], 16)
                return r, g, b
            except ValueError:
                return None
        return None

    def _rgb_to_ansi_256(self, r: int, g: int, b: int) -> str:
        if r == g == b:
            if r < 8: return "16"
            if r > 248: return "231"
            return str(round(((r - 8) / 247) * 23) + 232)
        
        ansi_r = int(r / 256 * 6)
        ansi_g = int(g / 256 * 6)
        ansi_b = int(b / 256 * 6)
        return str(16 + (36 * ansi_r) + (6 * ansi_g) + ansi_b)

    def _parse_styles(self, style_string: str) -> str:
        style_string = style_string.strip().lower()
        
        if style_string == "/":
            return "\033[0m"

        ansi_parts = []
        tokens = style_string.split()

        for token in tokens:
            if token in self._STYLES:
                ansi_parts.append(self._STYLES[token])
            elif token in self._STANDARD_COLORS:
                ansi_parts.append(self._STANDARD_COLORS[token])
            else:
                rgb = self._hex_to_rgb(token)
                if rgb is not None:
                    r, g, b = rgb
                    color_id = self._rgb_to_ansi_256(r, g, b)
                    ansi_parts.append(f"38;5;{color_id}")

        if ansi_parts:
            return f"\033[{';'.join(ansi_parts)}m"
        return ""

    def format(self, text: str) -> str:
        result = []
        last_idx = 0

        for match in self._tag_regex.finditer(text):
            result.append(text[last_idx:match.start()])
            tag_content = match.group(1)
            ansi_code = self._parse_styles(tag_content)
            result.append(ansi_code)
            last_idx = match.end()

        result.append(text[last_idx:])
        return "".join(result) + "\033[0m"

    def __call__(self, text: str) -> str:
        return self.format(text)

    def __getitem__(self, style_key: str):
        ansi_code = self._parse_styles(style_key)
        reset_code = "\033[0m"
        return lambda text: f"{ansi_code}{text}{reset_code}"

colormax = ColorMax()

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🛠️ Usage Modes & Examples

Mode 1: Dynamic Tag Syntax

Ideal for quick logging, Command Line Interfaces (CLIs), and mixed inline formatting strings.

from src.colormax import colormax

# Simple usage combining styles and standard colors
print(colormax("Status: [bold green]ONLINE[/] - Database: [#00FFCC]Connected[/]"))

# Multiple modifiers inside a single tag
print(colormax("Alert: [bold underline #FF3333]PROX-Z BLOCK INTRUSION DETECTED[/]"))

Mode 2: Dictionary Syntax (Closures)

Ideal for UI component design, highly structured layouts, and processing large volumes of data streams, as it stores the pre-compiled ANSI codes directly in memory.

from src.colormax import colormax

# Generating reusable interface style tokens
critical_error = colormax["bold #FF0055"]
light_warning  = colormax["light #FFFF00"]
smooth_info    = colormax["italic white"]

# Applying the components safely
print(critical_error("CRITICAL_ERROR: Core data matrix mapping failure."))
print(light_warning("WARN: CPU temperature scaling above baseline metrics."))
print(smooth_info("Info: Execution pipeline finished with zero faults."))

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📊 Supported Tokens Table

You can seamlessly combine one style modifier, one standard color, and/or one custom Hexadecimal code inside the exact same tag block, separated by a single space character.

Style Token	Visual Effect	Color Token	Representative Palette
bold	Bold / High Intensity	black	Standard Terminal Black
light / dim	Faint / Lower Intensity	red	Standard Terminal Red
italic	Italicized Text	green	Standard Terminal Green
underline	Underlined Text	yellow	Standard Terminal Yellow
blink	Blinking Text (If supported)	blue	Standard Terminal Blue
medium	Normal Text Weight / Reset	magenta	Standard Terminal Magenta
/#HEX	True Color Custom Hex (e.g. #FF5500)	cyan / white	Standard Terminal Cyan / White

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🌍 Cross-Platform Compliance

• Linux / macOS: 100% native out-of-the-box support across any modern terminal engine (Bash, Zsh, Fish).
• Android (Pydroid 3 / Termux): Rigorously optimized. Layout boundaries do not warp or clip text sequences, guaranteeing aligned matrix tables and UI borders right on your smartphone.
• Windows: Requires VT100 virtual terminal processing mode activation (handled natively by modern Windows 10/11 environments when initializing Python scripts, or via an internal call to the standard os.system('') module setup).

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📄 License

This project is licensed under the MIT License. Feel free to use, modify, and distribute it however you see fit!