first commit

README.md

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+# svg-to-dia
+
+[Dia](http://dia-installer.de/) is an open-source diagram editor.
+It supports [SVG pictograms](http://dia-installer.de/shapes/index.html).
+**svg-to-dia** converts ordinary SVG in the format supported by Dia.
+
+# How to use
+
+- Prepare files:
+```
+svg-to-dia --name my-shapes my-file1.svg my-file2.svg my-file3.svg
+```
+the above command will create a sheets/ and a shapes/ folders.
+
+- Move the generated files to dia's folder
+```
+mv sheets/* ~/.dia/sheets
+mv shapes/* ~/.dia/shapes
+```
+
+- Don't forget to restart dia
+- If you intend to publish, make sure to edit the `.sheet` files to add human-readable descriptions (multiple languages if you can)
+- ... and to edit the `.shape` files to add better coordinates of attachment points
+
+# License
+svg-to-dia is released in the public domain, see [UNLICENSE file](UNLICENSE).

UNLICENSE

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+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

svg-to-dia.py

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+#!/usr/bin/env python3
+# This is free and unencumbered software released into the public domain.
+
+from argparse import ArgumentParser
+import xml.etree.ElementTree as ET
+from dataclasses import dataclass
+from pathlib import Path
+import getpass
+import re
+import subprocess
+
+
+@dataclass
+class Sheet:
+    name: str
+    author: str
+    description: str
+    objects: dict
+
+
+def build_sheet(sheet):
+    xsheet = ET.Element(
+        'sheet',
+        attrib={'xmlns': 'http://www.lysator.liu.se/~alla/dia/dia-sheet-ns'}
+    )
+    if sheet.name:
+        ET.SubElement(xsheet, 'name').text = sheet.name
+    if sheet.author:
+        ET.SubElement(xsheet, 'created_by').text = sheet.author
+    if sheet.description:
+        ET.SubElement(xsheet, 'description').text = sheet.description
+
+    xcontents = ET.SubElement(xsheet, 'contents')
+    for oname, odescription in sheet.objects.items():
+        xobj = ET.SubElement(xcontents, 'object')
+        xobj.attrib['name'] = oname
+        ET.SubElement(xobj, 'description').text = odescription
+    return xsheet
+
+
+def get_float(s):
+    return float(re.match(r'\d+([.]\d*)?', s)[0])
+
+
+def build_shape(svg_path):
+    orig_xsvg = ET.parse(str(svg_path)).getroot()
+
+    xshape = ET.Element('shape', attrib={'xmlns': 'http://www.daa.com.au/~james/dia-shape-ns'})
+    ET.SubElement(xshape, 'name').text = svg_path.stem
+    ET.SubElement(xshape, 'icon').text = f"{svg_path.stem}.png"
+
+    width = int(get_float(orig_xsvg.attrib['width']))
+    height = int(get_float(orig_xsvg.attrib['height']))
+    xconns = ET.SubElement(xshape, 'connections')
+    points = [
+        (0, 0),
+        (0, width // 2),
+        (0, width),
+        (height // 2, 0),
+        (height, 0),
+    ]
+    for x, y in points:
+        ET.SubElement(xconns, 'point', attrib={'x': str(x), 'y': str(y)})
+
+    ET.SubElement(xshape, 'aspectratio', attrib={'type': 'fixed'})
+    xshape.append(orig_xsvg)
+
+    return xshape
+
+
+def main():
+    aparser = ArgumentParser()
+    aparser.add_argument('--name', default='TODO')
+    aparser.add_argument('svg_file', nargs='+')
+    args = aparser.parse_args()
+
+    psheets = Path('sheets')
+    psheets.mkdir(exist_ok=True)
+    pshapes = Path('shapes')
+    pshapes.mkdir(exist_ok=True)
+
+    sheet = Sheet(
+        name=args.name,
+        author=getpass.getuser(),
+        description=f"TODO: fill {args.name} description",
+        objects={}
+    )
+
+    for svg_file in args.svg_file:
+        svg_file = Path(svg_file)
+
+        xshape = build_shape(svg_file)
+        # ET.indent(xshape)
+        tshape = ET.tostring(xshape, encoding='unicode')
+        shape_path = pshapes.joinpath(f"{svg_file.stem}.shape")
+        shape_path.write_text(tshape)
+        print(f"wrote {shape_path}")
+
+        png_file = f'{pshapes}/{svg_file.stem}.png'
+        subprocess.check_call([
+            'convert',
+            str(svg_file),
+            '-resize',
+            '64x64',
+            png_file,
+        ])
+        print(f"wrote {png_file}")
+
+        sheet.objects[svg_file.stem] = f"TODO: fill description for {svg_file.stem}"
+
+    xsheet = build_sheet(sheet)
+    # ET.indent(xsheet)
+    tsheet = ET.tostring(xsheet, encoding="unicode")
+    sheet_path = psheets.joinpath(f"{args.name}.sheet")
+    sheet_path.write_text(tsheet)
+    print(f"wrote {sheet_path}")
+
+
+if __name__ == '__main__':
+    main()