feat: Implement Sideline plugin system with consistent terminology
This commit implements the Sideline/Mainline split with a clean plugin architecture: ## Core Changes ### Sideline Framework (New Directory) - Created directory containing the reusable pipeline framework - Moved pipeline core, controllers, adapters, and registry to - Moved display system to - Moved effects system to - Created plugin system with security and compatibility management in - Created preset pack system with ASCII art encoding in - Added default font (Corptic) to - Added terminal ANSI constants to ### Mainline Application (Updated) - Created for Mainline stage component registration - Updated to register Mainline stages at startup - Updated as a compatibility shim re-exporting from sideline ### Terminology Consistency - : Base class for all pipeline components (sources, effects, displays, cameras) - : Base class for distributable plugin packages (was ) - : Base class for visual effects (was ) - Backward compatibility aliases maintained for existing code ## Key Features - Plugin discovery via entry points and explicit registration - Security permissions system for plugins - Compatibility management with semantic version constraints - Preset pack system for distributable configurations - Default font bundled with Sideline (Corptic.otf) ## Testing - Updated tests to register Mainline stages before discovery - All StageRegistry tests passing Note: This is a major refactoring that separates the framework (Sideline) from the application (Mainline), enabling Sideline to be used by other applications.
This commit is contained in:
245
sideline/render/blocks.py
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245
sideline/render/blocks.py
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"""Block rendering core - Font loading, text rasterization, word-wrap, and headline assembly.
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Provides PIL font-based rendering to terminal half-block characters.
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"""
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import random
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import re
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from pathlib import Path
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from typing import Optional, Tuple
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from PIL import Image, ImageDraw, ImageFont
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from sideline.fonts import get_default_font_path, get_default_font_size
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# ─── FONT LOADING ─────────────────────────────────────────
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_FONT_OBJ = None
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_FONT_OBJ_KEY = None
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_FONT_CACHE = {}
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def font():
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"""Lazy-load the default Sideline font."""
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global _FONT_OBJ, _FONT_OBJ_KEY
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try:
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font_path = get_default_font_path()
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font_size = get_default_font_size()
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except FileNotFoundError:
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# Fallback to system default if Sideline font not found
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return ImageFont.load_default()
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key = (font_path, font_size)
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if _FONT_OBJ is None or key != _FONT_OBJ_KEY:
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try:
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_FONT_OBJ = ImageFont.truetype(font_path, font_size)
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_FONT_OBJ_KEY = key
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except Exception:
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# If loading fails, fall back to system default
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_FONT_OBJ = ImageFont.load_default()
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_FONT_OBJ_KEY = key
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return _FONT_OBJ
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def clear_font_cache():
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"""Reset cached font objects."""
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global _FONT_OBJ, _FONT_OBJ_KEY
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_FONT_OBJ = None
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_FONT_OBJ_KEY = None
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def load_font_face(font_path, font_index=0, size=None):
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"""Load a specific face from a font file or collection."""
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if size is None:
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size = get_default_font_size()
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return ImageFont.truetype(font_path, size, index=font_index)
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def list_font_faces(font_path, max_faces=64):
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"""Return discoverable face indexes + display names from a font file."""
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faces = []
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for idx in range(max_faces):
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try:
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fnt = load_font_face(font_path, idx)
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except Exception:
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if idx == 0:
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raise
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break
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family, style = fnt.getname()
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display = f"{family} {style}".strip()
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if not display:
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display = f"{Path(font_path).stem} [{idx}]"
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faces.append({"index": idx, "name": display})
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return faces
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def font_for_lang(lang: Optional[str] = None):
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"""Get appropriate font for a language.
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Currently uses the default Sideline font for all languages.
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Language-specific fonts can be added via the font cache system.
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"""
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if lang is None:
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return font()
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if lang not in _FONT_CACHE:
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# Try to load language-specific font, fall back to default
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try:
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# Could add language-specific font logic here
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_FONT_CACHE[lang] = font()
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except Exception:
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_FONT_CACHE[lang] = font()
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return _FONT_CACHE[lang]
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# ─── RASTERIZATION ────────────────────────────────────────
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def render_line(text, fnt=None):
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"""Render a line of text as terminal rows using OTF font + half-blocks."""
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if fnt is None:
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fnt = font()
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bbox = fnt.getbbox(text)
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if not bbox or bbox[2] <= bbox[0]:
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return [""]
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pad = 4
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img_w = bbox[2] - bbox[0] + pad * 2
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img_h = bbox[3] - bbox[1] + pad * 2
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img = Image.new("L", (img_w, img_h), 0)
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draw = ImageDraw.Draw(img)
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draw.text((-bbox[0] + pad, -bbox[1] + pad), text, fill=255, font=fnt)
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# Rendering parameters (can be made configurable)
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render_h = 6 # Terminal rows per rendered line
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ssaa = 2 # Supersampling anti-aliasing factor
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pix_h = render_h * 2
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hi_h = pix_h * ssaa
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scale = hi_h / max(img_h, 1)
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new_w_hi = max(1, int(img_w * scale))
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img = img.resize((new_w_hi, hi_h), Image.Resampling.LANCZOS)
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new_w = max(1, int(new_w_hi / ssaa))
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img = img.resize((new_w, pix_h), Image.Resampling.LANCZOS)
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data = img.tobytes()
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thr = 80
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rows = []
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for y in range(0, pix_h, 2):
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row = []
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for x in range(new_w):
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top = data[y * new_w + x] > thr
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bot = data[(y + 1) * new_w + x] > thr if y + 1 < pix_h else False
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if top and bot:
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row.append("█")
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elif top:
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row.append("▀")
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elif bot:
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row.append("▄")
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else:
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row.append(" ")
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rows.append("".join(row))
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return rows
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def big_wrap(text: str, width: int, fnt=None) -> list[str]:
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"""Wrap text and render to big block characters."""
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if fnt is None:
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fnt = font()
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text = re.sub(r"\s+", " ", text.upper())
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words = text.split()
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lines = []
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cur = ""
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# Get font size for height calculation
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try:
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font_size = fnt.size if hasattr(fnt, "size") else get_default_font_size()
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except Exception:
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font_size = get_default_font_size()
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render_h = 6 # Terminal rows per rendered line
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for word in words:
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test = f"{cur} {word}".strip() if cur else word
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bbox = fnt.getbbox(test)
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if bbox:
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img_h = bbox[3] - bbox[1] + 8
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pix_h = render_h * 2
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scale = pix_h / max(img_h, 1)
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term_w = int((bbox[2] - bbox[0] + 8) * scale)
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else:
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term_w = 0
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max_term_w = width - 4 - 4
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if term_w > max_term_w and cur:
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lines.append(cur)
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cur = word
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else:
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cur = test
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if cur:
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lines.append(cur)
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out = []
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for i, ln in enumerate(lines):
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out.extend(render_line(ln, fnt))
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if i < len(lines) - 1:
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out.append("")
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return out
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# ─── HEADLINE BLOCK ASSEMBLY ─────────────────────────────
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def make_block(title: str, src: str, ts: str, w: int) -> Tuple[list[str], str, int]:
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"""Render a headline into a content block with color.
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Args:
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title: Headline text to render
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src: Source identifier (for metadata)
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ts: Timestamp string (for metadata)
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w: Width constraint in terminal characters
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Returns:
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tuple: (content_lines, color_code, meta_row_index)
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- content_lines: List of rendered text lines
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- color_code: ANSI color code for display
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- meta_row_index: Row index of metadata line
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"""
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# Use default font for all languages (simplified from original)
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lang_font = font()
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# Simple uppercase conversion (can be made language-aware later)
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title_up = re.sub(r"\s+", " ", title.upper())
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# Standardize quotes and dashes
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for old, new in [
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("\u2019", "'"),
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("\u2018", "'"),
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("\u201c", '"'),
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("\u201d", '"'),
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("\u2013", "-"),
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("\u2014", "-"),
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]:
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title_up = title_up.replace(old, new)
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big_rows = big_wrap(title_up, w - 4, lang_font)
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# Matrix-style color selection
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hc = random.choice(
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[
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"\033[38;5;46m", # matrix green
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"\033[38;5;34m", # dark green
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"\033[38;5;82m", # lime
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"\033[38;5;48m", # sea green
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"\033[38;5;37m", # teal
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"\033[38;5;44m", # cyan
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"\033[38;5;87m", # sky
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"\033[38;5;117m", # ice blue
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"\033[38;5;250m", # cool white
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"\033[38;5;156m", # pale green
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"\033[38;5;120m", # mint
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"\033[38;5;80m", # dark cyan
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"\033[38;5;108m", # grey-green
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"\033[38;5;115m", # sage
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"\033[1;38;5;46m", # bold green
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"\033[1;38;5;250m", # bold white
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]
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)
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content = [" " + r for r in big_rows]
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content.append("")
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meta = f"\u2591 {src} \u00b7 {ts}"
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content.append(" " * max(2, w - len(meta) - 2) + meta)
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return content, hc, len(content) - 1 # (rows, color, meta_row_index)
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