1053 lines
40 KiB
Python
1053 lines
40 KiB
Python
#!/usr/bin/env python3
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"""
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render_body.py — Build the inner-page PDF from tokens.json + content.json.
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Usage:
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python3 render_body.py --tokens tokens.json --content content.json --out body.pdf
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Block types:
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h1 h2 h3 Headings (h1 adds a full-width accent rule below)
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body Justified prose paragraph
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bullet Bullet list item (• prefix)
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numbered Auto-numbered list item (resets when interrupted)
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callout Highlighted insight box with left accent bar
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table Data table with accent header + alternating rows
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image Inline image from file path
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figure Image with auto-numbered "Figure N:" caption
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code Monospace code block with accent left border
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math Display math formula via matplotlib mathtext
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chart Bar / line / pie chart rendered via matplotlib
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flowchart Process diagram rendered via matplotlib
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bibliography Numbered reference list
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divider Full-width accent rule
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caption Small muted text (e.g., under a figure)
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pagebreak Force a new page
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spacer Vertical whitespace (pt field, default 12)
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Exit codes: 0 success, 1 bad args/missing file, 2 missing dep, 3 render error
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"""
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import argparse
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import io
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import json
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import os
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import sys
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import importlib.util
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# ── Dependency bootstrap ───────────────────────────────────────────────────────
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def ensure_deps():
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missing = [p for p in ("reportlab", "pypdf")
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if importlib.util.find_spec(p) is None]
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if missing:
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import subprocess
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subprocess.check_call(
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[sys.executable, "-m", "pip", "install",
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"--break-system-packages", "-q"] + missing
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)
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ensure_deps()
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from reportlab.platypus import (
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BaseDocTemplate, PageTemplate, Frame,
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Paragraph, Spacer, Table, TableStyle,
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HRFlowable, PageBreak, Flowable, KeepTogether,
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Preformatted, Image as RLImage,
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)
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from reportlab.lib.pagesizes import A4
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from reportlab.lib.styles import ParagraphStyle
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from reportlab.lib.colors import HexColor
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from reportlab.lib.enums import TA_JUSTIFY, TA_CENTER
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from reportlab.pdfbase import pdfmetrics
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from reportlab.pdfbase.ttfonts import TTFont
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# ── Font registration ──────────────────────────────────────────────────────────
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def register_fonts(tokens: dict):
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"""Register TTF fonts from token font_paths if present."""
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for name, fpath in tokens.get("font_paths", {}).items():
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if os.path.exists(fpath):
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try:
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pdfmetrics.registerFont(TTFont(name, fpath))
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except Exception:
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pass
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# ══════════════════════════════════════════════════════════════════════════════
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# Custom Flowables
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# ══════════════════════════════════════════════════════════════════════════════
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class CalloutBox(Flowable):
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"""Highlighted insight box: coloured background + 4px left accent bar."""
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def __init__(self, text: str, style, accent: str, bg: str):
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super().__init__()
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self._para = Paragraph(text, style)
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self._accent = HexColor(accent)
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self._bg = HexColor(bg)
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def wrap(self, aw, ah):
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self._w = aw
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_, ph = self._para.wrap(aw - 36, ah)
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self._h = ph + 22
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return aw, self._h
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def draw(self):
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c = self.canv
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c.setFillColor(self._bg)
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c.roundRect(0, 0, self._w, self._h, 5, fill=1, stroke=0)
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c.setFillColor(self._accent)
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c.rect(0, 0, 4, self._h, fill=1, stroke=0)
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self._para.drawOn(c, 18, 11)
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class BibliographyItem(Flowable):
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"""Single hanging-indent bibliography entry rendered as [N] text."""
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LABEL_W = 28
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def __init__(self, ref_id: str, text: str, style, dark: str):
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super().__init__()
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self._id = ref_id
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self._text = text
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self._style = style
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self._dark = HexColor(dark)
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def wrap(self, aw, ah):
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self._w = aw
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self._para = Paragraph(self._text, self._style)
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_, ph = self._para.wrap(aw - self.LABEL_W, ah)
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self._h = ph + 4
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return aw, self._h
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def draw(self):
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c = self.canv
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c.setFillColor(self._dark)
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c.setFont("Helvetica-Bold", 8.5)
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c.drawString(0, self._h - 12, f"[{self._id}]")
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self._para.drawOn(c, self.LABEL_W, 2)
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# ══════════════════════════════════════════════════════════════════════════════
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# Page template (header + footer)
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# ══════════════════════════════════════════════════════════════════════════════
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class BeautifulDoc(BaseDocTemplate):
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def __init__(self, path: str, tokens: dict, **kw):
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self._t = tokens
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super().__init__(path, **kw)
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fr = Frame(
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self.leftMargin, self.bottomMargin,
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self.width, self.height, id="body",
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)
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tmpl = PageTemplate(id="main", frames=fr, onPage=self._decorate)
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self.addPageTemplates([tmpl])
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def _decorate(self, canv, doc):
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t = self._t
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lm = doc.leftMargin
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rm = doc.rightMargin
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pw = doc.pagesize[0]
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ph = doc.pagesize[1]
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top = ph - doc.topMargin
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canv.saveState()
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# Header accent rule
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canv.setStrokeColor(HexColor(t["accent"]))
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canv.setLineWidth(1.5)
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canv.line(lm, top + 12, pw - rm, top + 12)
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# Header: title (left) + date (right)
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canv.setFillColor(HexColor(t["muted"]))
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canv.setFont(t["font_body_rl"], t["size_meta"])
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canv.drawString(lm, top + 16, t["title"].upper())
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canv.drawRightString(pw - rm, top + 16, t.get("date", ""))
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# Footer rule
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canv.setStrokeColor(HexColor("#DDDDDD"))
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canv.setLineWidth(0.5)
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canv.line(lm, doc.bottomMargin - 12, pw - rm, doc.bottomMargin - 12)
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# Footer: author (left) + page number (right)
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canv.setFillColor(HexColor(t["muted"]))
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canv.setFont(t["font_body_rl"], t["size_meta"])
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canv.drawString(lm, doc.bottomMargin - 22, t.get("author", ""))
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canv.drawRightString(pw - rm, doc.bottomMargin - 22, str(doc.page))
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canv.restoreState()
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# ══════════════════════════════════════════════════════════════════════════════
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# Style factory
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# ══════════════════════════════════════════════════════════════════════════════
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def make_styles(t: dict) -> dict:
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hf = t["font_display_rl"]
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bf = t["font_body_rl"]
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bfb = t["font_body_b_rl"]
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dk = t["body_text"]
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d = t["dark"]
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mu = t["muted"]
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return {
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"h1": ParagraphStyle("H1",
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fontName=hf, fontSize=t["size_h1"],
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leading=t["size_h1"] * 1.3,
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textColor=HexColor(d),
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spaceBefore=t["section_gap"], spaceAfter=4,
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),
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"h2": ParagraphStyle("H2",
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fontName=hf, fontSize=t["size_h2"],
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leading=t["size_h2"] * 1.4,
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textColor=HexColor(d),
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spaceBefore=18, spaceAfter=5,
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),
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"h3": ParagraphStyle("H3",
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fontName=bfb, fontSize=t["size_h3"],
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leading=t["size_h3"] * 1.5,
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textColor=HexColor(d),
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spaceBefore=12, spaceAfter=3,
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),
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"body": ParagraphStyle("Body",
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fontName=bf, fontSize=t["size_body"],
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leading=t["line_gap"],
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textColor=HexColor(dk),
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spaceAfter=t["para_gap"], alignment=TA_JUSTIFY,
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),
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"bullet": ParagraphStyle("Bullet",
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fontName=bf, fontSize=t["size_body"],
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leading=t["line_gap"] - 1,
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textColor=HexColor(dk),
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spaceAfter=4, leftIndent=14,
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),
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"numbered": ParagraphStyle("Numbered",
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fontName=bf, fontSize=t["size_body"],
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leading=t["line_gap"] - 1,
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textColor=HexColor(dk),
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spaceAfter=4, leftIndent=22, firstLineIndent=-22,
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),
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"callout": ParagraphStyle("Callout",
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fontName=bfb, fontSize=t["size_body"] + 0.5, leading=16,
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textColor=HexColor(d),
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),
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"caption": ParagraphStyle("Caption",
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fontName=bf, fontSize=t["size_caption"], leading=13,
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textColor=HexColor(mu), spaceAfter=6,
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alignment=TA_CENTER,
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),
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"table_header": ParagraphStyle("TblH",
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fontName=bfb, fontSize=9.5, leading=13,
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textColor=HexColor("#FFFFFF"),
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),
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"table_cell": ParagraphStyle("TblC",
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fontName=bf, fontSize=9.5, leading=13,
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textColor=HexColor(dk),
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),
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"code": ParagraphStyle("Code",
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fontName="Courier", fontSize=8.5, leading=12.5,
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textColor=HexColor(dk),
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),
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"code_lang": ParagraphStyle("CodeLang",
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fontName="Courier", fontSize=7, leading=10,
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textColor=HexColor(mu),
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),
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"bib": ParagraphStyle("Bib",
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fontName=bf, fontSize=9, leading=14,
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textColor=HexColor(dk),
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),
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"bib_title": ParagraphStyle("BibTitle",
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fontName=hf, fontSize=t["size_h2"],
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leading=t["size_h2"] * 1.4,
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textColor=HexColor(d),
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spaceBefore=t["section_gap"], spaceAfter=8,
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),
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"math_fallback": ParagraphStyle("MathFb",
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fontName="Courier", fontSize=9, leading=13,
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textColor=HexColor(dk),
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),
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"eq_label": ParagraphStyle("EqLabel",
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fontName="Helvetica", fontSize=9, leading=12,
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textColor=HexColor(mu),
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),
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}
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# ══════════════════════════════════════════════════════════════════════════════
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# Shared helpers
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# ══════════════════════════════════════════════════════════════════════════════
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def _divider(accent: str) -> HRFlowable:
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return HRFlowable(
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width="100%", thickness=1.2,
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color=HexColor(accent),
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spaceBefore=14, spaceAfter=14,
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)
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def _image_from_bytes(png_bytes: bytes, usable_w: float,
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max_frac: float = 0.88) -> RLImage:
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"""Create a scaled RLImage from PNG bytes, bounded to max_frac of usable_w."""
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img = RLImage(io.BytesIO(png_bytes))
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max_w = usable_w * max_frac
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if img.drawWidth > max_w:
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scale = max_w / img.drawWidth
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img.drawWidth = max_w
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img.drawHeight = img.drawHeight * scale
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return img
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# ══════════════════════════════════════════════════════════════════════════════
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# PNG renderers (matplotlib)
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# ══════════════════════════════════════════════════════════════════════════════
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def _render_math_png(expr: str, dpi: int = 180) -> bytes | None:
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"""
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Render a LaTeX math expression via matplotlib mathtext.
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No LaTeX binary required — uses matplotlib's built-in math parser.
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Supports: fractions (\\frac), integrals (\\int), sums (\\sum),
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Greek letters, sub/superscripts, etc.
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"""
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try:
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import matplotlib
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matplotlib.use("Agg")
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import matplotlib.pyplot as plt
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fig = plt.figure(figsize=(8, 1.2))
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fig.patch.set_facecolor("white")
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ax = fig.add_axes([0, 0, 1, 1])
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ax.set_axis_off()
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ax.set_facecolor("white")
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ax.text(0.5, 0.5, f"${expr}$",
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fontsize=16, ha="center", va="center",
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transform=ax.transAxes)
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buf = io.BytesIO()
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fig.savefig(buf, format="png", dpi=dpi, bbox_inches="tight",
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facecolor="white", pad_inches=0.1)
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plt.close(fig)
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buf.seek(0)
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return buf.read()
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except Exception:
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return None
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def _render_chart_png(item: dict, accent: str, dpi: int = 150) -> bytes | None:
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"""
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Render bar / line / pie chart to PNG using matplotlib.
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Required fields:
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chart_type "bar" | "line" | "pie" (default "bar")
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labels list of category strings
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datasets list of {label?, values: list[number]}
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Optional fields:
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title chart title
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x_label X-axis label
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y_label Y-axis label
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"""
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try:
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import matplotlib
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matplotlib.use("Agg")
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import matplotlib.pyplot as plt
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import matplotlib.colors as mcolors
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import colorsys
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import numpy as np
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chart_type = item.get("chart_type", "bar")
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title_text = item.get("title", "")
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labels = item.get("labels", [])
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datasets = item.get("datasets", [])
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# Derive a consistent palette from the document accent color
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r, g, b = mcolors.to_rgb(accent)
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h, s, v = colorsys.rgb_to_hsv(r, g, b)
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palette = [
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colorsys.hsv_to_rgb(
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(h + i * 0.13) % 1.0,
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max(0.35, s - i * 0.08),
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min(0.92, v + i * 0.04),
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)
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for i in range(max(len(datasets), 1))
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]
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fig, ax = plt.subplots(figsize=(7, 3.6), dpi=dpi)
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fig.patch.set_facecolor("white")
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ax.set_facecolor("white")
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if chart_type == "bar":
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x = np.arange(len(labels))
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n = max(len(datasets), 1)
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width = 0.68 / n
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for i, ds in enumerate(datasets):
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offset = (i - (n - 1) / 2) * width
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ax.bar(x + offset, ds.get("values", []), width * 0.88,
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label=ds.get("label", f"Series {i+1}"),
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color=palette[i % len(palette)], edgecolor="none")
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ax.set_xticks(x)
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ax.set_xticklabels(labels, fontsize=8.5)
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ax.yaxis.grid(True, alpha=0.25, color="#CCCCCC", linewidth=0.7)
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ax.set_axisbelow(True)
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if item.get("x_label"):
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ax.set_xlabel(item["x_label"], fontsize=8.5)
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||
if item.get("y_label"):
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ax.set_ylabel(item["y_label"], fontsize=8.5)
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|
||
elif chart_type == "line":
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||
x = np.arange(len(labels))
|
||
for i, ds in enumerate(datasets):
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ax.plot(x, ds.get("values", []), marker="o", markersize=3.5,
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||
label=ds.get("label", f"Series {i+1}"),
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color=palette[i % len(palette)], linewidth=1.8)
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||
ax.set_xticks(x)
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||
ax.set_xticklabels(labels, fontsize=8.5)
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||
ax.yaxis.grid(True, alpha=0.25, color="#CCCCCC", linewidth=0.7)
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||
ax.set_axisbelow(True)
|
||
if item.get("x_label"):
|
||
ax.set_xlabel(item["x_label"], fontsize=8.5)
|
||
if item.get("y_label"):
|
||
ax.set_ylabel(item["y_label"], fontsize=8.5)
|
||
|
||
elif chart_type == "pie":
|
||
vals = datasets[0].get("values", []) if datasets else []
|
||
colors = [
|
||
colorsys.hsv_to_rgb(
|
||
(h + i * 0.11) % 1.0,
|
||
max(0.30, s - i * 0.06),
|
||
min(0.92, v + i * 0.03),
|
||
)
|
||
for i in range(len(vals))
|
||
]
|
||
ax.pie(vals, labels=labels, colors=colors,
|
||
autopct="%1.1f%%", pctdistance=0.82,
|
||
wedgeprops=dict(edgecolor="white", linewidth=1.4),
|
||
textprops=dict(fontsize=8.5))
|
||
|
||
# Shared styling
|
||
for spine in ax.spines.values():
|
||
spine.set_linewidth(0.5)
|
||
spine.set_color("#CCCCCC")
|
||
ax.tick_params(axis="both", length=0, labelsize=8.5)
|
||
if title_text:
|
||
ax.set_title(title_text, fontsize=10, pad=8,
|
||
color="#333333", fontweight="bold")
|
||
if len(datasets) > 1 and chart_type != "pie":
|
||
ax.legend(frameon=False, fontsize=8, loc="upper right")
|
||
|
||
plt.tight_layout(pad=0.4)
|
||
buf = io.BytesIO()
|
||
fig.savefig(buf, format="png", dpi=dpi, bbox_inches="tight",
|
||
facecolor="white", pad_inches=0.06)
|
||
plt.close(fig)
|
||
buf.seek(0)
|
||
return buf.read()
|
||
except Exception:
|
||
return None
|
||
|
||
|
||
def _render_flowchart_png(item: dict, accent: str, dark: str,
|
||
muted: str, dpi: int = 130) -> bytes | None:
|
||
"""
|
||
Render a top-to-bottom flowchart using matplotlib patches and arrows.
|
||
|
||
Node schema: {id, label, shape?}
|
||
shape: "rect" (default) | "diamond" | "oval" | "parallelogram"
|
||
|
||
Edge schema: {from, to, label?}
|
||
Forward edges (to a later node) draw straight arrows.
|
||
Back edges (to an earlier node) draw a curved arc to the right.
|
||
"""
|
||
try:
|
||
import matplotlib
|
||
matplotlib.use("Agg")
|
||
import matplotlib.pyplot as plt
|
||
import matplotlib.patches as mpatch
|
||
from matplotlib.patches import FancyBboxPatch
|
||
import matplotlib.colors as mcolors
|
||
|
||
nodes_list = item.get("nodes", [])
|
||
edges = item.get("edges", [])
|
||
if not nodes_list:
|
||
return None
|
||
|
||
nodes = {n["id"]: n for n in nodes_list}
|
||
order = {n["id"]: i for i, n in enumerate(nodes_list)}
|
||
|
||
n_nodes = len(nodes_list)
|
||
BOX_W = 4.2
|
||
BOX_H = 0.58
|
||
STEP_Y = 1.25
|
||
CX = 5.0
|
||
|
||
fig_h = max(3.5, n_nodes * STEP_Y + 0.8)
|
||
fig, ax = plt.subplots(figsize=(6, fig_h), dpi=dpi)
|
||
fig.patch.set_facecolor("white")
|
||
ax.set_facecolor("white")
|
||
ax.set_xlim(0, 10)
|
||
ax.set_ylim(-0.6, n_nodes * STEP_Y + 0.2)
|
||
ax.invert_yaxis()
|
||
ax.axis("off")
|
||
|
||
acc_rgb = mcolors.to_rgb(accent)
|
||
dark_rgb = mcolors.to_rgb(dark)
|
||
muted_rgb = mcolors.to_rgb(muted)
|
||
|
||
# Node positions (cx, cy) — preserves input order
|
||
pos = {nid: (CX, i * STEP_Y) for nid, i in order.items()}
|
||
|
||
# ── Draw edges (behind nodes) ──────────────────────────────────────────
|
||
for edge in edges:
|
||
src, dst = edge.get("from"), edge.get("to")
|
||
if src not in pos or dst not in pos:
|
||
continue
|
||
x1, y1 = pos[src]
|
||
x2, y2 = pos[dst]
|
||
lbl = edge.get("label", "")
|
||
|
||
src_shape = nodes.get(src, {}).get("shape", "rect")
|
||
dst_shape = nodes.get(dst, {}).get("shape", "rect")
|
||
dy_src = BOX_H * (0.80 if src_shape == "diamond" else 0.50)
|
||
dy_dst = BOX_H * (0.80 if dst_shape == "diamond" else 0.50)
|
||
|
||
y_start = y1 + dy_src
|
||
y_end = y2 - dy_dst
|
||
|
||
# Forward edge: straight; back-edge: curved arc
|
||
conn = "arc3,rad=0.0" if y_end > y_start + 0.01 else "arc3,rad=0.42"
|
||
|
||
ax.annotate("",
|
||
xy=(x2, y_end), xytext=(x1, y_start),
|
||
arrowprops=dict(
|
||
arrowstyle="-|>", color=muted_rgb,
|
||
lw=1.0, mutation_scale=10,
|
||
connectionstyle=conn,
|
||
),
|
||
)
|
||
if lbl:
|
||
mid_x = (x1 + x2) / 2 + 0.28
|
||
mid_y = (y_start + y_end) / 2
|
||
ax.text(mid_x, mid_y, lbl, fontsize=7.5,
|
||
color=muted_rgb, ha="left", va="center")
|
||
|
||
# ── Draw nodes (in front of edges) ────────────────────────────────────
|
||
for nid, (cx, cy) in pos.items():
|
||
node = nodes[nid]
|
||
shape = node.get("shape", "rect")
|
||
label = node.get("label", nid)
|
||
left = cx - BOX_W / 2
|
||
bot = cy - BOX_H / 2
|
||
|
||
if shape in ("oval", "terminal"):
|
||
el = mpatch.Ellipse(
|
||
(cx, cy), BOX_W * 0.78, BOX_H * 1.15,
|
||
facecolor=acc_rgb, edgecolor=acc_rgb, linewidth=0,
|
||
)
|
||
ax.add_patch(el)
|
||
ax.text(cx, cy, label, ha="center", va="center",
|
||
fontsize=8.5, fontweight="bold", color="white")
|
||
|
||
elif shape == "diamond":
|
||
d = BOX_W * 0.44
|
||
diamond = plt.Polygon(
|
||
[(cx, cy - d * 0.72), (cx + d, cy),
|
||
(cx, cy + d * 0.72), (cx - d, cy)],
|
||
facecolor="#FFFCF0",
|
||
edgecolor=accent, linewidth=1.2,
|
||
)
|
||
ax.add_patch(diamond)
|
||
ax.text(cx, cy, label, ha="center", va="center",
|
||
fontsize=8, color=dark_rgb)
|
||
|
||
elif shape == "parallelogram":
|
||
skew = 0.30
|
||
para = plt.Polygon(
|
||
[(left + skew, bot), (left + BOX_W + skew, bot),
|
||
(left + BOX_W, bot + BOX_H), (left, bot + BOX_H)],
|
||
facecolor="white",
|
||
edgecolor=accent, linewidth=1.2,
|
||
)
|
||
ax.add_patch(para)
|
||
ax.text(cx, cy, label, ha="center", va="center",
|
||
fontsize=8.5, color=dark_rgb)
|
||
|
||
else: # rect (default)
|
||
rect = FancyBboxPatch(
|
||
(left, bot), BOX_W, BOX_H,
|
||
boxstyle="round,pad=0.04",
|
||
facecolor="white",
|
||
edgecolor=accent, linewidth=1.2,
|
||
)
|
||
ax.add_patch(rect)
|
||
ax.text(cx, cy, label, ha="center", va="center",
|
||
fontsize=8.5, color=dark_rgb)
|
||
|
||
plt.tight_layout(pad=0.2)
|
||
buf = io.BytesIO()
|
||
fig.savefig(buf, format="png", dpi=dpi, bbox_inches="tight",
|
||
facecolor="white", pad_inches=0.08)
|
||
plt.close(fig)
|
||
buf.seek(0)
|
||
return buf.read()
|
||
except Exception:
|
||
return None
|
||
|
||
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
# Block renderers
|
||
#
|
||
# All functions share the same signature:
|
||
# _add_XXX(story: list, item: dict, ctx: dict)
|
||
#
|
||
# ctx keys:
|
||
# tokens dict design tokens from palette.py
|
||
# styles dict ParagraphStyle objects from make_styles()
|
||
# usable_w float usable page width in points
|
||
# acc str accent hex color
|
||
# acc_lt str light accent hex color
|
||
# mu str muted hex color
|
||
# dark str dark hex color
|
||
# figure_n int auto-incrementing figure counter (mutable)
|
||
# numbered_n int auto-incrementing list counter (mutable)
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
|
||
def _add_heading(story: list, item: dict, ctx: dict, level: int):
|
||
key = f"h{level}"
|
||
para = Paragraph(item["text"], ctx["styles"][key])
|
||
if level == 1:
|
||
story.append(KeepTogether([para, _divider(ctx["acc"])]))
|
||
else:
|
||
story.append(para)
|
||
|
||
|
||
def _add_body(story: list, item: dict, ctx: dict):
|
||
story.append(Paragraph(item["text"], ctx["styles"]["body"]))
|
||
|
||
|
||
def _add_bullet(story: list, item: dict, ctx: dict):
|
||
story.append(Paragraph(
|
||
f"\u2022\u2002{item['text']}", ctx["styles"]["bullet"]
|
||
))
|
||
|
||
|
||
def _add_numbered(story: list, item: dict, ctx: dict):
|
||
ctx["numbered_n"] += 1
|
||
story.append(Paragraph(
|
||
f"{ctx['numbered_n']}.\u2002{item['text']}",
|
||
ctx["styles"]["numbered"],
|
||
))
|
||
|
||
|
||
def _add_callout(story: list, item: dict, ctx: dict):
|
||
story.append(Spacer(1, 8))
|
||
story.append(CalloutBox(
|
||
item["text"], ctx["styles"]["callout"], ctx["acc"], ctx["acc_lt"]
|
||
))
|
||
story.append(Spacer(1, 8))
|
||
|
||
|
||
def _add_table(story: list, item: dict, ctx: dict):
|
||
t = ctx["tokens"]
|
||
styles = ctx["styles"]
|
||
usable_w = ctx["usable_w"]
|
||
acc = ctx["acc"]
|
||
acc_lt = ctx["acc_lt"]
|
||
|
||
headers = [Paragraph(h, styles["table_header"]) for h in item["headers"]]
|
||
rows = [
|
||
[Paragraph(str(c), styles["table_cell"]) for c in row]
|
||
for row in item.get("rows", [])
|
||
]
|
||
n_cols = len(item["headers"])
|
||
|
||
# Optional col_widths as fractions summing to 1.0
|
||
if "col_widths" in item and len(item["col_widths"]) == n_cols:
|
||
col_w = [usable_w * f for f in item["col_widths"]]
|
||
else:
|
||
col_w = [usable_w / n_cols] * n_cols
|
||
|
||
tbl = Table([headers] + rows, colWidths=col_w)
|
||
tbl.setStyle(TableStyle([
|
||
("BACKGROUND", (0, 0), (-1, 0), HexColor(acc)),
|
||
("TEXTCOLOR", (0, 0), (-1, 0), HexColor("#FFFFFF")),
|
||
("FONTNAME", (0, 0), (-1, 0), t["font_body_b_rl"]),
|
||
("FONTSIZE", (0, 0), (-1, 0), 9.5),
|
||
("TOPPADDING", (0, 0), (-1, 0), 7),
|
||
("BOTTOMPADDING", (0, 0), (-1, 0), 7),
|
||
("ROWBACKGROUNDS", (0, 1), (-1, -1),
|
||
[HexColor("#FFFFFF"), HexColor(acc_lt)]),
|
||
("FONTNAME", (0, 1), (-1, -1), t["font_body_rl"]),
|
||
("FONTSIZE", (0, 1), (-1, -1), 9.5),
|
||
("TOPPADDING", (0, 1), (-1, -1), 6),
|
||
("BOTTOMPADDING", (0, 1), (-1, -1), 6),
|
||
("LEFTPADDING", (0, 0), (-1, -1), 10),
|
||
("RIGHTPADDING", (0, 0), (-1, -1), 10),
|
||
("BOX", (0, 0), (-1, -1), 0.5, HexColor("#CCCCCC")),
|
||
("LINEBELOW", (0, 0), (-1, 0), 1.2, HexColor(acc)),
|
||
("TEXTCOLOR", (0, 1), (-1, -1), HexColor(t["body_text"])),
|
||
("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
|
||
]))
|
||
story.append(tbl)
|
||
if item.get("caption"):
|
||
story.append(Spacer(1, 4))
|
||
story.append(Paragraph(item["caption"], styles["caption"]))
|
||
story.append(Spacer(1, 12))
|
||
|
||
|
||
def _add_image(story: list, item: dict, ctx: dict):
|
||
path = str(item.get("path", item.get("src", "")))
|
||
if not os.path.exists(path):
|
||
story.append(Paragraph(
|
||
f"[Image not found: {path}]", ctx["styles"]["caption"]
|
||
))
|
||
return
|
||
try:
|
||
img = RLImage(path)
|
||
uw = ctx["usable_w"]
|
||
if img.drawWidth > uw:
|
||
scale = uw / img.drawWidth
|
||
img.drawWidth = uw
|
||
img.drawHeight = img.drawHeight * scale
|
||
story.append(img)
|
||
except Exception as e:
|
||
story.append(Paragraph(f"[Image error: {e}]", ctx["styles"]["caption"]))
|
||
return
|
||
if item.get("caption"):
|
||
story.append(Spacer(1, 4))
|
||
story.append(Paragraph(item["caption"], ctx["styles"]["caption"]))
|
||
story.append(Spacer(1, 8))
|
||
|
||
|
||
def _add_figure(story: list, item: dict, ctx: dict):
|
||
"""Like image but auto-numbers the caption as 'Figure N: ...'."""
|
||
ctx["figure_n"] += 1
|
||
raw_cap = item.get("caption", "")
|
||
caption = f"Figure {ctx['figure_n']}: {raw_cap}" if raw_cap \
|
||
else f"Figure {ctx['figure_n']}"
|
||
_add_image(story, {**item, "caption": caption}, ctx)
|
||
|
||
|
||
def _add_code(story: list, item: dict, ctx: dict):
|
||
acc = ctx["acc"]
|
||
acc_lt = ctx["acc_lt"]
|
||
mu = ctx["mu"]
|
||
uw = ctx["usable_w"]
|
||
lang = item.get("language", "")
|
||
|
||
pre = Preformatted(item.get("text", ""), ctx["styles"]["code"])
|
||
tbl = Table([[pre]], colWidths=[uw])
|
||
tbl.setStyle(TableStyle([
|
||
("BACKGROUND", (0, 0), (-1, -1), HexColor(acc_lt)),
|
||
("LINEBEFORE", (0, 0), ( 0, -1), 3, HexColor(acc)),
|
||
("BOX", (0, 0), (-1, -1), 0.5, HexColor(mu)),
|
||
("LEFTPADDING", (0, 0), (-1, -1), 14),
|
||
("RIGHTPADDING", (0, 0), (-1, -1), 10),
|
||
("TOPPADDING", (0, 0), (-1, -1), 8),
|
||
("BOTTOMPADDING", (0, 0), (-1, -1), 8),
|
||
]))
|
||
story.append(Spacer(1, 6))
|
||
if lang:
|
||
story.append(Paragraph(lang.upper(), ctx["styles"]["code_lang"]))
|
||
story.append(tbl)
|
||
story.append(Spacer(1, 6))
|
||
|
||
|
||
def _add_math(story: list, item: dict, ctx: dict):
|
||
"""
|
||
Display math block.
|
||
|
||
Fields:
|
||
text LaTeX math expression (without enclosing $)
|
||
label optional equation label, e.g. "(1)" — displayed right-aligned
|
||
caption optional caption below the formula
|
||
|
||
Example:
|
||
{"type": "math", "text": "E = mc^2", "label": "(1)"}
|
||
{"type": "math", "text": "\\\\int_0^\\\\infty e^{-x^2}\\\\,dx = \\\\frac{\\\\sqrt{\\\\pi}}{2}"}
|
||
"""
|
||
acc = ctx["acc"]
|
||
acc_lt = ctx["acc_lt"]
|
||
uw = ctx["usable_w"]
|
||
expr = item.get("text", "").strip()
|
||
label = item.get("label", "").strip()
|
||
|
||
png = _render_math_png(expr)
|
||
|
||
if png is None:
|
||
# Graceful text fallback if matplotlib unavailable
|
||
story.append(Spacer(1, 6))
|
||
pre = Preformatted(f" {expr}", ctx["styles"]["math_fallback"])
|
||
tbl = Table([[pre]], colWidths=[uw])
|
||
tbl.setStyle(TableStyle([
|
||
("BACKGROUND", (0, 0), (-1, -1), HexColor(acc_lt)),
|
||
("LEFTPADDING", (0, 0), (-1, -1), 14),
|
||
("RIGHTPADDING", (0, 0), (-1, -1), 14),
|
||
("TOPPADDING", (0, 0), (-1, -1), 8),
|
||
("BOTTOMPADDING", (0, 0), (-1, -1), 8),
|
||
]))
|
||
story.append(tbl)
|
||
story.append(Spacer(1, 6))
|
||
return
|
||
|
||
img = _image_from_bytes(png, uw, max_frac=0.72)
|
||
story.append(Spacer(1, 10))
|
||
|
||
if label:
|
||
label_w = 44
|
||
formula_w = uw - label_w
|
||
lbl_para = Paragraph(label, ctx["styles"]["eq_label"])
|
||
row_tbl = Table([[img, lbl_para]], colWidths=[formula_w, label_w])
|
||
row_tbl.setStyle(TableStyle([
|
||
("ALIGN", (0, 0), (0, 0), "CENTER"),
|
||
("ALIGN", (1, 0), (1, 0), "RIGHT"),
|
||
("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
|
||
]))
|
||
story.append(row_tbl)
|
||
else:
|
||
row_tbl = Table([[img]], colWidths=[uw])
|
||
row_tbl.setStyle(TableStyle([
|
||
("ALIGN", (0, 0), (-1, -1), "CENTER"),
|
||
]))
|
||
story.append(row_tbl)
|
||
|
||
if item.get("caption"):
|
||
story.append(Spacer(1, 4))
|
||
story.append(Paragraph(item["caption"], ctx["styles"]["caption"]))
|
||
story.append(Spacer(1, 10))
|
||
|
||
|
||
def _add_chart(story: list, item: dict, ctx: dict):
|
||
"""
|
||
Render a chart (bar / line / pie) via matplotlib.
|
||
|
||
Fields:
|
||
chart_type "bar" | "line" | "pie" (default "bar")
|
||
title chart title
|
||
labels list of category strings
|
||
datasets list of {label?, values: list[number]}
|
||
x_label X-axis label (bar/line)
|
||
y_label Y-axis label (bar/line)
|
||
caption caption text below chart
|
||
figure bool (default true) — prefix caption with "Figure N:"
|
||
"""
|
||
uw = ctx["usable_w"]
|
||
png = _render_chart_png(item, ctx["acc"])
|
||
|
||
if png is None:
|
||
story.append(Paragraph(
|
||
"[Chart: install matplotlib to render — pip install matplotlib]",
|
||
ctx["styles"]["caption"],
|
||
))
|
||
return
|
||
|
||
img = _image_from_bytes(png, uw, max_frac=0.95)
|
||
story.append(Spacer(1, 8))
|
||
row_tbl = Table([[img]], colWidths=[uw])
|
||
row_tbl.setStyle(TableStyle([("ALIGN", (0, 0), (-1, -1), "CENTER")]))
|
||
story.append(row_tbl)
|
||
|
||
raw_cap = item.get("caption", "")
|
||
use_fig = item.get("figure", True)
|
||
if raw_cap or use_fig:
|
||
ctx["figure_n"] += 1
|
||
prefix = f"Figure {ctx['figure_n']}: " if use_fig else ""
|
||
story.append(Spacer(1, 4))
|
||
story.append(Paragraph(prefix + raw_cap, ctx["styles"]["caption"]))
|
||
story.append(Spacer(1, 10))
|
||
|
||
|
||
def _add_flowchart(story: list, item: dict, ctx: dict):
|
||
"""
|
||
Render a flowchart via matplotlib.
|
||
|
||
Fields:
|
||
nodes list of {id, label, shape?}
|
||
shape: "rect" (default) | "diamond" | "oval" | "parallelogram"
|
||
edges list of {from, to, label?}
|
||
caption caption below the diagram
|
||
figure bool (default true) — prefix caption with "Figure N:"
|
||
"""
|
||
uw = ctx["usable_w"]
|
||
png = _render_flowchart_png(item, ctx["acc"], ctx["dark"], ctx["mu"])
|
||
|
||
if png is None:
|
||
story.append(Paragraph(
|
||
"[Flowchart: install matplotlib to render — pip install matplotlib]",
|
||
ctx["styles"]["caption"],
|
||
))
|
||
return
|
||
|
||
img = _image_from_bytes(png, uw, max_frac=0.78)
|
||
story.append(Spacer(1, 8))
|
||
row_tbl = Table([[img]], colWidths=[uw])
|
||
row_tbl.setStyle(TableStyle([("ALIGN", (0, 0), (-1, -1), "CENTER")]))
|
||
story.append(row_tbl)
|
||
|
||
raw_cap = item.get("caption", "")
|
||
use_fig = item.get("figure", True)
|
||
if raw_cap or use_fig:
|
||
ctx["figure_n"] += 1
|
||
prefix = f"Figure {ctx['figure_n']}: " if use_fig else ""
|
||
story.append(Spacer(1, 4))
|
||
story.append(Paragraph(prefix + raw_cap, ctx["styles"]["caption"]))
|
||
story.append(Spacer(1, 10))
|
||
|
||
|
||
def _add_bibliography(story: list, item: dict, ctx: dict):
|
||
"""
|
||
Numbered reference list with hanging indent.
|
||
|
||
Fields:
|
||
title section heading (default "References"); set "" to suppress
|
||
items list of {id, text}
|
||
|
||
Example:
|
||
{"type": "bibliography",
|
||
"items": [
|
||
{"id": "1", "text": "Smith, J. (2023). Title. Journal, 10(2), 1–15."},
|
||
{"id": "2", "text": "Doe, A. (2022). Another title. Publisher."}
|
||
]}
|
||
"""
|
||
heading = item.get("title", "References")
|
||
if heading:
|
||
story.append(KeepTogether([
|
||
Paragraph(heading, ctx["styles"]["bib_title"]),
|
||
_divider(ctx["acc"]),
|
||
]))
|
||
|
||
for ref in item.get("items", []):
|
||
story.append(Spacer(1, 4))
|
||
story.append(BibliographyItem(
|
||
str(ref.get("id", "")),
|
||
ref.get("text", ""),
|
||
ctx["styles"]["bib"],
|
||
ctx["dark"],
|
||
))
|
||
|
||
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
# Story builder
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
|
||
# Block types that break a numbered list sequence
|
||
_RESETS_NUMBERED = frozenset({
|
||
"h1", "h2", "h3", "body", "bullet", "callout", "table",
|
||
"image", "figure", "code", "math", "chart", "flowchart",
|
||
"bibliography", "divider", "caption", "pagebreak", "spacer",
|
||
})
|
||
|
||
|
||
def build_story(content: list, tokens: dict, styles: dict) -> list:
|
||
usable_w = A4[0] - tokens["margin_left"] - tokens["margin_right"]
|
||
|
||
ctx: dict = {
|
||
"tokens": tokens,
|
||
"styles": styles,
|
||
"usable_w": usable_w,
|
||
"acc": tokens["accent"],
|
||
"acc_lt": tokens["accent_lt"],
|
||
"mu": tokens["muted"],
|
||
"dark": tokens["dark"],
|
||
"figure_n": 0,
|
||
"numbered_n": 0,
|
||
}
|
||
|
||
story: list = []
|
||
|
||
for item in content:
|
||
kind = item.get("type", "body")
|
||
|
||
if kind in _RESETS_NUMBERED:
|
||
ctx["numbered_n"] = 0
|
||
|
||
if kind == "h1": _add_heading(story, item, ctx, 1)
|
||
elif kind == "h2": _add_heading(story, item, ctx, 2)
|
||
elif kind == "h3": _add_heading(story, item, ctx, 3)
|
||
elif kind == "body": _add_body(story, item, ctx)
|
||
elif kind == "bullet": _add_bullet(story, item, ctx)
|
||
elif kind == "numbered": _add_numbered(story, item, ctx)
|
||
elif kind == "callout": _add_callout(story, item, ctx)
|
||
elif kind == "table": _add_table(story, item, ctx)
|
||
elif kind == "image": _add_image(story, item, ctx)
|
||
elif kind == "figure": _add_figure(story, item, ctx)
|
||
elif kind == "code": _add_code(story, item, ctx)
|
||
elif kind == "math": _add_math(story, item, ctx)
|
||
elif kind == "chart": _add_chart(story, item, ctx)
|
||
elif kind == "flowchart": _add_flowchart(story, item, ctx)
|
||
elif kind == "bibliography": _add_bibliography(story, item, ctx)
|
||
elif kind == "divider": story.append(_divider(ctx["acc"]))
|
||
elif kind == "caption":
|
||
story.append(Paragraph(item["text"], styles["caption"]))
|
||
elif kind == "pagebreak": story.append(PageBreak())
|
||
elif kind == "spacer": story.append(Spacer(1, item.get("pt", 12)))
|
||
|
||
return story
|
||
|
||
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
# Main build
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
|
||
def build(tokens: dict, content: list, out_path: str) -> dict:
|
||
register_fonts(tokens)
|
||
styles = make_styles(tokens)
|
||
|
||
doc = BeautifulDoc(
|
||
out_path, tokens,
|
||
pagesize=A4,
|
||
leftMargin=tokens["margin_left"],
|
||
rightMargin=tokens["margin_right"],
|
||
topMargin=tokens["margin_top"],
|
||
bottomMargin=tokens["margin_bottom"],
|
||
)
|
||
doc.build(build_story(content, tokens, styles))
|
||
|
||
size = os.path.getsize(out_path)
|
||
return {"status": "ok", "out": out_path, "size_kb": size // 1024}
|
||
|
||
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
# CLI
|
||
# ══════════════════════════════════════════════════════════════════════════════
|
||
|
||
def main():
|
||
parser = argparse.ArgumentParser(
|
||
description="Render body PDF from tokens.json + content.json"
|
||
)
|
||
parser.add_argument("--tokens", default="tokens.json")
|
||
parser.add_argument("--content", default="content.json")
|
||
parser.add_argument("--out", default="body.pdf")
|
||
args = parser.parse_args()
|
||
|
||
for fpath in (args.tokens, args.content):
|
||
if not os.path.exists(fpath):
|
||
print(
|
||
json.dumps({"status": "error",
|
||
"error": f"File not found: {fpath}"}),
|
||
file=sys.stderr,
|
||
)
|
||
sys.exit(1)
|
||
|
||
with open(args.tokens, encoding="utf-8") as f:
|
||
tokens = json.load(f)
|
||
with open(args.content, encoding="utf-8") as f:
|
||
content = json.load(f)
|
||
|
||
try:
|
||
result = build(tokens, content, args.out)
|
||
print(json.dumps(result))
|
||
except Exception as e:
|
||
import traceback
|
||
print(
|
||
json.dumps({
|
||
"status": "error",
|
||
"error": str(e),
|
||
"trace": traceback.format_exc(),
|
||
}),
|
||
file=sys.stderr,
|
||
)
|
||
sys.exit(3)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
main()
|