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SVG handling now completely in JS
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Stefan Bethke 2025-06-01 13:01:38 +02:00
commit 990f98f1e3
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99
buba/create_font.py
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"""
Create an SVG "font" by using the base segments from geascript-proportional.svg and creating a SVG with 256 symbols in it.
"""
import os
from xml.dom import minidom, Node
from xml.dom.minidom import getDOMImplementation, Element
fontspec = {
'41': [
'.##### ###### ###### ######',
'###... ...### #..... ......',
'#.#### ###### ###### ######',
],
'42': [
'###### ###### ###### ######',
'###... ...### #..... ...###',
'#.#### #####. ###### #####.',
],
}
class Design:
def __init__(self, filename):
self.dom = minidom.parse(filename)
(_, _, self.width, self.height) = [float(x) for x in
self.dom.documentElement.getAttribute("viewBox").split(' ')]
r = {}
for n in self.dom.getElementsByTagName("g")[0].childNodes:
if n.nodeType == Node.ELEMENT_NODE:
self.remove_namespaced_attributes(n)
self.remove_style_attributes(n)
id = n.getAttribute("id")
r[id] = n
self.segments = r
self.symbols = getDOMImplementation().createDocument(None, "svg", None)
self.svg = self.symbols.documentElement
self.svg.setAttribute("xmlns", "http://www.w3.org/2000/svg")
self.svg.setAttribute("style", "height: 0; width: 0; position: absolute;")
def remove_namespaced_attributes(self, node:Element):
if node.nodeType != Node.ELEMENT_NODE:
return
for a in list(node._attrsNS.values()):
if a.prefix is not None:
node.removeAttributeNode(a)
for child in node.childNodes:
self.remove_namespaced_attributes(child)
def remove_style_attributes(self, node:Element):
if node.nodeType != Node.ELEMENT_NODE:
return
if node.hasAttribute("style"):
node.removeAttribute("style")
for child in node.childNodes:
self.remove_namespaced_attributes(child)
def make_symbol(self, codepoint):
"""
Use the spec to copy all segments into a new symbol.
:param codepoint:
:return:
"""
spec = fontspec[f"{codepoint:02x}"]
symbol = self.symbols.createElement("symbol")
self.svg.appendChild(symbol)
symbol.setAttribute("id", f"x{codepoint:02x}")
symbol.setAttribute("viewBox", f"0 0 {self.width * len(spec):.3f} {self.height}")
for strip_index, strip in enumerate(spec):
i = 1
g = self.symbols.createElement("g")
symbol.appendChild(g)
g.setAttribute("id", f"x{codepoint:02x}-{strip_index}")
g.setAttribute("transform", f"translate({self.width * strip_index:.3f} 0)")
for segment in list(strip):
if segment == '#':
clone = self.segments[f"seg{i:02d}"].cloneNode(True)
clone.removeAttribute("id")
g.appendChild(clone)
# clone
pass
elif segment == '.':
# no not clone this one
pass
else:
continue
i += 1
if __name__ == '__main__':
here = os.path.abspath(os.path.dirname(__file__))
design = Design(os.path.join(here, 'design/geascript-proportional.svg'))
design.make_symbol(0x41)
design.make_symbol(0x42)
with open("static/font.svg", "w") as symbolsfile:
design.symbols.writexml(symbolsfile, addindent=' ', newl='\n')

127
buba/static/font.svg
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@ -1,127 +0,0 @@
<?xml version="1.0" ?>
<svg xmlns="http://www.w3.org/2000/svg" style="height: 0; width: 0; position: absolute;">
<symbol id="x41" viewBox="0 0 5.100 15.699999">
<g id="x41-0" transform="translate(0.000 0)">
<path d="M 1.6757133,1.4711956 V 0.0197877 H 0.85412223 Z"/>
<path d="m 1.6820624,1.9503833 -1.66855387,0.00131 0.0063,-0.4804985 0.8223243,-1.451396 0.83358937,1.451398 z"/>
<path d="M 0.01350853,1.9516941 1.6820626,1.9503873 1.6886758,2.436732 0.87500133,3.9227533 0.01979853,2.436732 Z"/>
<path d="m 0.01979993,3.9227491 v -1.486021 l 0.8552028,1.486021 z"/>
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<rect width="1.6688768" height="1.0757513" x="0.019799877" y="7.9125233"/>
<path d="M 0.01979973,8.9882748 1.6883538,8.9876458 0.85617373,9.9475398 Z"/>
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<path d="m 0.02609143,11.414717 v 1.451396 h 0.8223243 z"/>
<path d="m 1.6820047,11.414717 v 1.451408 H 0.86041373 Z"/>
<rect width="1.6688769" height="1.0673051" x="0.019799877" y="12.866271"/>
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<path d="m 1.688677,14.473684 v 1.188457 H 0.85423853 Z"/>
</g>
<g id="x41-1" transform="translate(1.700 0)">
<path d="M 0.01979999,1.4711941 V 0.0198 h 0.82232429 z"/>
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</g>
<g id="x41-2" transform="translate(3.400 0)">
<path d="M 0.01979999,1.4711941 V 0.0198 h 0.82232429 z"/>
<path d="m 1.6820624,1.9503833 -1.66855387,0.00131 0.0063,-0.4804985 0.8223243,-1.451396 0.83358937,1.451398 z"/>
<path d="M 0.01350853,1.9516941 1.6820626,1.9503873 1.6886758,2.436732 0.87500133,3.9227533 0.01979853,2.436732 Z"/>
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<path d="M 1.6886766,7.9125236 0.86881113,6.7461891 0.01979973,7.9125236 Z"/>
<rect width="1.6688768" height="1.0757513" x="0.019799877" y="7.9125233"/>
<path d="M 0.01979973,8.9882748 1.6883538,8.9876458 0.85617373,9.9475398 Z"/>
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<path d="m 1.6820047,11.414717 v 1.451408 H 0.86041373 Z"/>
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<path d="m 1.688677,14.473684 v 1.188457 H 0.85423853 Z"/>
</g>
</symbol>
<symbol id="x42" viewBox="0 0 5.100 15.699999">
<g id="x42-0" transform="translate(0.000 0)">
<path d="M 0.01979999,1.4711941 V 0.0198 h 0.82232429 z"/>
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<path d="M 0.01350853,1.9516941 1.6820626,1.9503873 1.6886758,2.436732 0.87500133,3.9227533 0.01979853,2.436732 Z"/>
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<path d="M 0.87500273,3.9227491 H 0.01979993 V 5.0929905 Z"/>
<path d="M 1.688677,5.0867989 V 3.9227491 H 0.87500273 Z"/>
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</g>
</symbol>
</svg>
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21
buba/static/fonttest.html
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<!DOCTYPE html>
<html>
<head>
<title>Font Test</title>
<link rel=stylesheet type="text/css" href="main.css">
</head>
<body>
<h1>Font Test</h1>
<p>
<svg class="char">
<use href="font.svg#x41"/>
</svg>
<svg class="char">
<use href="font.svg#x42"/>
</svg>
<svg class="char">
<use href="font.svg#x41"/>
</svg>
</p>
</body>
</html>