WireViz/src/wireviz/wv_html.py
2024-07-12 19:05:12 +02:00

131 lines
5.0 KiB
Python

# -*- coding: utf-8 -*-
import re
from pathlib import Path
from typing import Callable, Dict, List, Union
from wireviz import APP_NAME, APP_URL, __version__, wv_colors
from wireviz.DataClasses import Metadata, Options
from wireviz.svgembed import data_URI_base64
from wireviz.wv_gv_html import html_line_breaks
from wireviz.wv_helper import (
file_read_text,
file_write_text,
flatten2d,
smart_file_resolve,
)
def generate_html_output(
filename: Union[str, Path],
bom_list: List[List[str]],
metadata: Metadata,
options: Options,
):
# load HTML template
templatename = metadata.get("template", {}).get("name")
if templatename:
# if relative path to template was provided, check directory of YAML file first, fall back to built-in template directory
templatefile = smart_file_resolve(
f"{templatename}.html",
[Path(filename).parent, Path(__file__).parent / "templates"],
)
else:
# fall back to built-in simple template if no template was provided
templatefile = Path(__file__).parent / "templates/simple.html"
html = file_read_text(templatefile) # TODO?: Warn if unexpected meta charset?
# embed SVG diagram (only if used)
def svgdata() -> str:
return re.sub( # TODO?: Verify xml encoding="utf-8" in SVG?
"^<[?]xml [^?>]*[?]>[^<]*<!DOCTYPE [^>]*>",
"<!-- XML and DOCTYPE declarations from SVG file removed -->",
file_read_text(f"{filename}.tmp.svg"),
1,
)
# generate BOM table
bom = flatten2d(bom_list)
# generate BOM header (may be at the top or bottom of the table)
bom_header_html = " <tr>\n"
for item in bom[0]:
th_class = f"bom_col_{item.lower()}"
bom_header_html = f'{bom_header_html} <th class="{th_class}">{item}</th>\n'
bom_header_html = f"{bom_header_html} </tr>\n"
# generate BOM contents
bom_contents = []
for row in bom[1:]:
row_html = " <tr>\n"
for i, item in enumerate(row):
td_class = f"bom_col_{bom[0][i].lower()}"
row_html = f'{row_html} <td class="{td_class}">{item}</td>\n'
row_html = f"{row_html} </tr>\n"
bom_contents.append(row_html)
bom_html = (
'<table class="bom">\n' + bom_header_html + "".join(bom_contents) + "</table>\n"
)
bom_html_reversed = (
'<table class="bom">\n'
+ "".join(list(reversed(bom_contents)))
+ bom_header_html
+ "</table>\n"
)
# prepare simple replacements
replacements = {
"<!-- %generator% -->": f"{APP_NAME} {__version__} - {APP_URL}",
"<!-- %fontname% -->": options.fontname,
"<!-- %bgcolor% -->": wv_colors.translate_color(options.bgcolor, "hex"),
"<!-- %filename% -->": str(filename),
"<!-- %filename_stem% -->": Path(filename).stem,
"<!-- %bom% -->": bom_html,
"<!-- %bom_reversed% -->": bom_html_reversed,
"<!-- %sheet_current% -->": "1", # TODO: handle multi-page documents
"<!-- %sheet_total% -->": "1", # TODO: handle multi-page documents
"<!-- %template_sheetsize% -->": metadata.get("template", {}).get(
"sheetsize", ""
),
}
def replacement_if_used(key: str, func: Callable[[], str]) -> None:
"""Append replacement only if used in html."""
if key in html:
replacements[key] = func()
replacement_if_used("<!-- %diagram% -->", svgdata)
replacement_if_used(
"<!-- %diagram_png_b64% -->", lambda: data_URI_base64(f"{filename}.png")
)
# prepare metadata replacements
if metadata:
for item, contents in metadata.items():
if isinstance(contents, (str, int, float)):
replacements[f"<!-- %{item}% -->"] = html_line_breaks(str(contents))
elif isinstance(contents, Dict): # useful for authors, revisions
for index, (category, entry) in enumerate(contents.items()):
if isinstance(entry, Dict):
replacements[f"<!-- %{item}_{index+1}% -->"] = str(category)
for entry_key, entry_value in entry.items():
replacements[
f"<!-- %{item}_{index+1}_{entry_key}% -->"
] = html_line_breaks(str(entry_value))
elif isinstance(entry, (str, int, float)):
pass # TODO?: replacements[f"<!-- %{item}_{category}% -->"] = html_line_breaks(str(entry))
# perform replacements
# regex replacement adapted from:
# https://gist.github.com/bgusach/a967e0587d6e01e889fd1d776c5f3729
# longer replacements first, just in case
replacements_sorted = sorted(replacements, key=len, reverse=True)
replacements_escaped = map(re.escape, replacements_sorted)
pattern = re.compile("|".join(replacements_escaped))
html = pattern.sub(lambda match: replacements[match.group(0)], html)
file_write_text(f"{filename}.html", html)