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-rw-r--r--src/app.py340
-rw-r--r--src/templates/index.html9
2 files changed, 258 insertions, 91 deletions
diff --git a/src/app.py b/src/app.py
index 1182c17..ce5a6e1 100644
--- a/src/app.py
+++ b/src/app.py
@@ -36,43 +36,71 @@ STATIC_DIR = BASE_DIR / "static"
ALLOWED_IMAGE_EXTS = {"png", "jpg", "jpeg", "gif", "webp", "svg"}
VALID_PAPER_SIZES = {
- "a0paper", "a1paper", "a2paper", "a3paper", "a4paper", "a5paper", "a6paper",
- "b0paper", "b1paper", "b2paper", "b3paper", "b4paper", "b5paper", "b6paper",
- "c4paper", "c5paper", "c6paper",
- "letterpaper", "legalpaper", "executivepaper",
- "ledgerpaper", "tabloid", "statement", "flsa",
+ "a0paper",
+ "a1paper",
+ "a2paper",
+ "a3paper",
+ "a4paper",
+ "a5paper",
+ "a6paper",
+ "b0paper",
+ "b1paper",
+ "b2paper",
+ "b3paper",
+ "b4paper",
+ "b5paper",
+ "b6paper",
+ "c4paper",
+ "c5paper",
+ "c6paper",
+ "letterpaper",
+ "legalpaper",
+ "executivepaper",
+ "ledgerpaper",
+ "tabloid",
+ "statement",
+ "flsa",
}
-VALID_MARGINS = {"0.25in", "0.35in", "0.5in", "0.75in", "1in", "1.25in", "1.5in", "1.75in"}
+VALID_MARGINS = {
+ "0.25in",
+ "0.35in",
+ "0.5in",
+ "0.75in",
+ "1in",
+ "1.25in",
+ "1.5in",
+ "1.75in",
+}
VALID_LINE_SPACINGS = {"1", "1.15", "1.5", "2"}
# css page dimensions for each paper size
PAPER_CSS = {
- "a0paper": "841mm 1189mm",
- "a1paper": "594mm 841mm",
- "a2paper": "420mm 594mm",
- "a3paper": "297mm 420mm",
- "a4paper": "210mm 297mm",
- "a5paper": "148mm 210mm",
- "a6paper": "105mm 148mm",
- "b0paper": "1000mm 1414mm",
- "b1paper": "707mm 1000mm",
- "b2paper": "500mm 707mm",
- "b3paper": "353mm 500mm",
- "b4paper": "250mm 353mm",
- "b5paper": "176mm 250mm",
- "b6paper": "125mm 176mm",
- "c4paper": "229mm 324mm",
- "c5paper": "162mm 229mm",
- "c6paper": "114mm 162mm",
- "letterpaper": "8.5in 11in",
- "legalpaper": "8.5in 14in",
- "executivepaper": "7in 10in",
- "ledgerpaper": "17in 11in",
- "tabloid": "11in 17in",
- "statement": "5.5in 8.5in",
- "flsa": "8.5in 13in",
+ "a0paper": "841mm 1189mm",
+ "a1paper": "594mm 841mm",
+ "a2paper": "420mm 594mm",
+ "a3paper": "297mm 420mm",
+ "a4paper": "210mm 297mm",
+ "a5paper": "148mm 210mm",
+ "a6paper": "105mm 148mm",
+ "b0paper": "1000mm 1414mm",
+ "b1paper": "707mm 1000mm",
+ "b2paper": "500mm 707mm",
+ "b3paper": "353mm 500mm",
+ "b4paper": "250mm 353mm",
+ "b5paper": "176mm 250mm",
+ "b6paper": "125mm 176mm",
+ "c4paper": "229mm 324mm",
+ "c5paper": "162mm 229mm",
+ "c6paper": "114mm 162mm",
+ "letterpaper": "8.5in 11in",
+ "legalpaper": "8.5in 14in",
+ "executivepaper": "7in 10in",
+ "ledgerpaper": "17in 11in",
+ "tabloid": "11in 17in",
+ "statement": "5.5in 8.5in",
+ "flsa": "8.5in 13in",
}
MARKDOWN_BASE_EXTENSIONS = [
@@ -132,7 +160,7 @@ def is_allowed_image(filename):
dot = filename.rfind(".")
if dot < 1 or dot == len(filename) - 1:
return False
- ext = filename[dot + 1:].lower()
+ ext = filename[dot + 1 :].lower()
return ext in ALLOWED_IMAGE_EXTS
@@ -159,14 +187,21 @@ def tail_text(value, max_len=1200):
# pdf stylesheet generator
-def build_pdf_css(paper_size, margin, font_family, line_spacing, show_page_numbers):
+def build_pdf_css(
+ paper_size,
+ margin,
+ font_family,
+ line_spacing,
+ show_page_numbers,
+ disable_backgrounds,
+):
"""build the css for weasyprint pdf rendering"""
page_dims = PAPER_CSS.get(paper_size, "8.5in 11in")
if font_family == "sans":
- font_stack = 'sans-serif'
+ font_stack = "sans-serif"
else:
- font_stack = 'serif'
+ font_stack = "serif"
page_number_css = ""
if show_page_numbers:
@@ -177,6 +212,23 @@ def build_pdf_css(paper_size, margin, font_family, line_spacing, show_page_numbe
color: #666;
}"""
+ code_block_background = "transparent" if disable_backgrounds else "#f5f5f5"
+ code_block_border = "none" if disable_backgrounds else "1px solid #ddd"
+ inline_code_background = "transparent" if disable_backgrounds else "#f0f0f0"
+ table_header_background = "transparent" if disable_backgrounds else "#f5f5f5"
+ codehilite_span_background = "transparent" if disable_backgrounds else "inherit"
+ code_background_reset_css = ""
+ if disable_backgrounds:
+ code_background_reset_css = """
+.highlight,
+.codehilite,
+.highlight pre,
+.codehilite pre,
+pre code {
+ background: transparent !important;
+}
+"""
+
return f"""
@page {{
size: {page_dims};
@@ -208,8 +260,8 @@ p {{
}}
pre {{
- background: #f5f5f5;
- border: 1px solid #ddd;
+ background: {code_block_background};
+ border: {code_block_border};
border-radius: 3px;
padding: 0.6em;
font-size: 9pt;
@@ -225,11 +277,17 @@ code {{
}}
p > code, li > code {{
- background: #f0f0f0;
+ background: {inline_code_background};
padding: 0.1em 0.3em;
border-radius: 2px;
}}
+.highlight span {{
+ background: {codehilite_span_background} !important;
+}}
+
+{code_background_reset_css}
+
blockquote {{
border-left: 3px solid #ccc;
margin: 0.6em 0;
@@ -251,7 +309,7 @@ th, td {{
}}
th {{
- background: #f5f5f5;
+ background: {table_header_background};
font-weight: bold;
}}
@@ -327,14 +385,30 @@ def convert_with_weasyprint(full_html, output_path):
return False, str(exc)
-def convert_with_reportlab(source_markdown, output_path, paper_size, margin,
- font_family, line_spacing):
+def convert_with_reportlab(
+ source_markdown, output_path, paper_size, margin, font_family, line_spacing
+):
"""fallback: produce a basic text pdf with reportlab.
not pretty, but guarantees a file is always created."""
from reportlab.lib.pagesizes import (
- A0, A1, A2, A3, A4, A5, A6,
- B0, B1, B2, B3, B4, B5, B6,
- LETTER, LEGAL, LEDGER, TABLOID,
+ A0,
+ A1,
+ A2,
+ A3,
+ A4,
+ A5,
+ A6,
+ B0,
+ B1,
+ B2,
+ B3,
+ B4,
+ B5,
+ B6,
+ LETTER,
+ LEGAL,
+ LEDGER,
+ TABLOID,
)
from reportlab.lib.units import inch, mm
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Preformatted
@@ -342,13 +416,25 @@ def convert_with_reportlab(source_markdown, output_path, paper_size, margin,
from reportlab.lib.enums import TA_LEFT
size_map = {
- "a0paper": A0, "a1paper": A1, "a2paper": A2, "a3paper": A3,
- "a4paper": A4, "a5paper": A5, "a6paper": A6,
- "b0paper": B0, "b1paper": B1, "b2paper": B2, "b3paper": B3,
- "b4paper": B4, "b5paper": B5, "b6paper": B6,
- "letterpaper": LETTER, "legalpaper": LEGAL,
+ "a0paper": A0,
+ "a1paper": A1,
+ "a2paper": A2,
+ "a3paper": A3,
+ "a4paper": A4,
+ "a5paper": A5,
+ "a6paper": A6,
+ "b0paper": B0,
+ "b1paper": B1,
+ "b2paper": B2,
+ "b3paper": B3,
+ "b4paper": B4,
+ "b5paper": B5,
+ "b6paper": B6,
+ "letterpaper": LETTER,
+ "legalpaper": LEGAL,
"executivepaper": (7 * inch, 10 * inch),
- "ledgerpaper": LEDGER, "tabloid": TABLOID,
+ "ledgerpaper": LEDGER,
+ "tabloid": TABLOID,
"statement": (5.5 * inch, 8.5 * inch),
"flsa": (8.5 * inch, 13 * inch),
"c4paper": (229 * mm, 324 * mm),
@@ -357,8 +443,13 @@ def convert_with_reportlab(source_markdown, output_path, paper_size, margin,
}
margin_map = {
- "0.25in": 0.25 * inch, "0.35in": 0.35 * inch, "0.5in": 0.5 * inch, "0.75in": 0.75 * inch,
- "1in": 1.0 * inch, "1.25in": 1.25 * inch, "1.5in": 1.5 * inch,
+ "0.25in": 0.25 * inch,
+ "0.35in": 0.35 * inch,
+ "0.5in": 0.5 * inch,
+ "0.75in": 0.75 * inch,
+ "1in": 1.0 * inch,
+ "1.25in": 1.25 * inch,
+ "1.5in": 1.5 * inch,
"1.75in": 1.75 * inch,
}
@@ -368,8 +459,10 @@ def convert_with_reportlab(source_markdown, output_path, paper_size, margin,
doc = SimpleDocTemplate(
output_path,
pagesize=pagesize,
- leftMargin=m, rightMargin=m,
- topMargin=m, bottomMargin=m,
+ leftMargin=m,
+ rightMargin=m,
+ topMargin=m,
+ bottomMargin=m,
)
styles = getSampleStyleSheet()
@@ -446,12 +539,27 @@ def convert_with_reportlab(source_markdown, output_path, paper_size, margin,
doc.build(story)
-def generate_pdf(source_markdown, output_path, paper_size, margin,
- font_family, line_spacing, show_page_numbers,
- enable_syntax_highlighting):
+def generate_pdf(
+ source_markdown,
+ output_path,
+ paper_size,
+ margin,
+ font_family,
+ line_spacing,
+ show_page_numbers,
+ enable_syntax_highlighting,
+ disable_backgrounds,
+):
"""convert markdown to pdf. always produces a file."""
body_html = markdown_to_html(source_markdown, enable_syntax_highlighting)
- css = build_pdf_css(paper_size, margin, font_family, line_spacing, show_page_numbers)
+ css = build_pdf_css(
+ paper_size,
+ margin,
+ font_family,
+ line_spacing,
+ show_page_numbers,
+ disable_backgrounds,
+ )
full_html = build_full_html(body_html, css)
ok, err = convert_with_weasyprint(full_html, output_path)
@@ -460,10 +568,16 @@ def generate_pdf(source_markdown, output_path, paper_size, margin,
# weasyprint failed — fall back to reportlab
try:
- current_app.logger.warning("weasyprint failed, using reportlab fallback: %s", err)
+ current_app.logger.warning(
+ "weasyprint failed, using reportlab fallback: %s", err
+ )
convert_with_reportlab(
- source_markdown, output_path,
- paper_size, margin, font_family, line_spacing,
+ source_markdown,
+ output_path,
+ paper_size,
+ margin,
+ font_family,
+ line_spacing,
)
return True, f"(used fallback renderer) {err}"
except Exception as fallback_err:
@@ -480,7 +594,9 @@ def create_app():
static_url_path="/static",
)
- app.config["MAX_CONTENT_LENGTH"] = int(os.getenv("MAX_CONTENT_LENGTH", str(64 * 1024 * 1024)))
+ app.config["MAX_CONTENT_LENGTH"] = int(
+ os.getenv("MAX_CONTENT_LENGTH", str(64 * 1024 * 1024))
+ )
if env_bool("TRUST_PROXY", default=True):
app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_port=1)
@@ -497,9 +613,15 @@ def create_app():
@app.errorhandler(413)
def payload_too_large(_err):
- return read_partial("upload_error.html", {
- "{{ message }}": "request body too large.",
- }), 413
+ return (
+ read_partial(
+ "upload_error.html",
+ {
+ "{{ message }}": "request body too large.",
+ },
+ ),
+ 413,
+ )
@app.route("/healthz")
def healthz():
@@ -513,15 +635,25 @@ def create_app():
def convert():
md = request.form.get("markdown", "").strip()
if not md:
- return read_partial("error.html", {
- "{{ message }}": "Markdown content is required.",
- }), 400
+ return (
+ read_partial(
+ "error.html",
+ {
+ "{{ message }}": "Markdown content is required.",
+ },
+ ),
+ 400,
+ )
paper_size = pick_option(
- request.form.get("paper_size", ""), "letterpaper", VALID_PAPER_SIZES,
+ request.form.get("paper_size", ""),
+ "letterpaper",
+ VALID_PAPER_SIZES,
)
margin = pick_option(
- request.form.get("margin", ""), "1in", VALID_MARGINS,
+ request.form.get("margin", ""),
+ "1in",
+ VALID_MARGINS,
)
font_family = request.form.get("main_font", "serif")
@@ -529,10 +661,15 @@ def create_app():
font_family = "serif"
line_spacing = pick_option(
- request.form.get("line_spacing", ""), "1", VALID_LINE_SPACINGS,
+ request.form.get("line_spacing", ""),
+ "1",
+ VALID_LINE_SPACINGS,
)
show_page_numbers = request.form.get("page_numbers") == "on"
- disable_syntax_highlighting = request.form.get("disable_syntax_highlighting") == "on"
+ disable_syntax_highlighting = (
+ request.form.get("disable_syntax_highlighting") == "on"
+ )
+ disable_backgrounds = request.form.get("disable_backgrounds") == "on"
output_name = f"{APP_NAME}_{int(time.time())}_{random_hex()}.pdf"
output_path = GENERATED_DIR / output_name
@@ -546,32 +683,54 @@ def create_app():
line_spacing,
show_page_numbers,
not disable_syntax_highlighting,
+ disable_backgrounds,
)
if not ok:
app.logger.error("pdf generation failed: %s", err)
- return read_partial("error.html", {
- "{{ message }}": str(escape(tail_text(err))),
- }), 500
+ return (
+ read_partial(
+ "error.html",
+ {
+ "{{ message }}": str(escape(tail_text(err))),
+ },
+ ),
+ 500,
+ )
- return read_partial("result.html", {
- "{{ filename }}": str(escape(output_name)),
- "{{ download_url }}": f"/download/{output_name}",
- })
+ return read_partial(
+ "result.html",
+ {
+ "{{ filename }}": str(escape(output_name)),
+ "{{ download_url }}": f"/download/{output_name}",
+ },
+ )
@app.route("/upload-image", methods=["POST"])
def upload_image():
uploaded = request.files.get("image")
if not uploaded or not uploaded.filename or not uploaded.filename.strip():
- return read_partial("upload_error.html", {
- "{{ message }}": "image file is required.",
- }), 400
+ return (
+ read_partial(
+ "upload_error.html",
+ {
+ "{{ message }}": "image file is required.",
+ },
+ ),
+ 400,
+ )
original = sanitize_filename(uploaded.filename)
if not original or not is_allowed_image(original):
- return read_partial("upload_error.html", {
- "{{ message }}": "unsupported image type.",
- }), 400
+ return (
+ read_partial(
+ "upload_error.html",
+ {
+ "{{ message }}": "unsupported image type.",
+ },
+ ),
+ 400,
+ )
ext = original.rsplit(".", 1)[-1].lower()
stored_name = f"img_{int(time.time())}_{random_hex()}.{ext}"
@@ -579,11 +738,14 @@ def create_app():
uploaded.save(str(image_path))
snippet = f"![](uploads/{stored_name})"
- return read_partial("upload_result.html", {
- "{{ filename }}": str(escape(stored_name)),
- "{{ markdown_snippet }}": str(escape(snippet)),
- "{{ preview_url }}": f"/uploads/{stored_name}",
- })
+ return read_partial(
+ "upload_result.html",
+ {
+ "{{ filename }}": str(escape(stored_name)),
+ "{{ markdown_snippet }}": str(escape(snippet)),
+ "{{ preview_url }}": f"/uploads/{stored_name}",
+ },
+ )
@app.route("/uploads/<path:filename>")
def serve_upload(filename):
diff --git a/src/templates/index.html b/src/templates/index.html
index 2ee0c52..9f3ea9c 100644
--- a/src/templates/index.html
+++ b/src/templates/index.html
@@ -28,7 +28,8 @@
<label for="markdown">
<h3>textarea</h3>
</label>
- <textarea id="markdown" name="markdown" rows="16" placeholder="markdown goes here..." required style="font-family: monospace;"></textarea>
+ <textarea id="markdown" name="markdown" rows="16" placeholder="markdown goes here..." required
+ style="font-family: monospace;"></textarea>
<section id="image-upload-section">
<label for="image"><small>image file</small></label>
@@ -119,7 +120,11 @@
</label>
<label>
- <input type="checkbox" name="disable_syntax_highlighting" value="on" /> disable syntax highlighting for code blocks
+ <input type="checkbox" name="disable_syntax_highlighting" value="on" /> disable syntax highlighting
+ </label>
+
+ <label>
+ <input type="checkbox" name="disable_backgrounds" value="on" /> disable .pdf backgrounds
</label>
</section>
generated by cgit v1.2.3 (git 2.39.1) at 2026-06-08 21:35:45 +0000