Skip to content

fix: prevent orphaned headings at page breaks #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
0xlaveen wants to merge 1 commit into
base: main
Choose a base branch
from
Open

fix: prevent orphaned headings at page breaks #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
33 changes: 21 additions & 12 deletions src/markpdf/renderer.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
from reportlab.lib.units import inch
from reportlab.platypus import (
CondPageBreak,
HRFlowable,
Image,
KeepTogether,
Expand Down Expand Up @@ -114,6 +115,7 @@ def create_styles(theme: dict[str, str | None]) -> dict:
spaceBefore=hd["sb"],
leading=hd["ld"],
fontName="Helvetica-Bold",
keepWithNext=True,
)
)

Expand Down Expand Up @@ -298,22 +300,29 @@ def build_story(
):
level = int(btype[1])
text = _fmt(content, theme)
story.append(
Paragraph(text, styles[f"Heading{level}Custom"])
)
# Avoid orphaned headings: break page if less than 1.2in remains
story.append(CondPageBreak(1.2 * inch))
if level == 2:
story.append(Spacer(1, 2))
story.append(
HRFlowable(
width="100%",
thickness=0.5,
color=colors.HexColor(theme["border"]),
spaceBefore=0,
spaceAfter=8,
)
KeepTogether([
Paragraph(text, styles[f"Heading{level}Custom"]),
Spacer(1, 2),
HRFlowable(
width="100%",
thickness=0.5,
color=colors.HexColor(theme["border"]),
spaceBefore=0,
spaceAfter=8,
),
])
)
else:
story.append(Spacer(1, 4))
story.append(
KeepTogether([
Paragraph(text, styles[f"Heading{level}Custom"]),
Spacer(1, 4),
])
)

elif btype == BLOCK_PARA:
story.append(
Expand Down