From 860440c97fe9d972ba72d56e5ef18a278f0597c0 Mon Sep 17 00:00:00 2001
From: Noah Davis <noahadvs@gmail.com>
Date: Fri, 10 Jul 2020 11:17:28 -0400
Subject: [PATCH] Add template for making python scripts that edit SVGs

---
 svg-xml-script-template.py | 46 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100755 svg-xml-script-template.py

diff --git a/svg-xml-script-template.py b/svg-xml-script-template.py
new file mode 100755
index 00000000..3c504bc2
--- /dev/null
+++ b/svg-xml-script-template.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+"""
+SPDX-License-Identifier: LicenseRef-KDE-Accepted-LGPL
+SPDX-FileCopyrightText: 2020 Noah Davis <noahadvs@gmail.com>
+SPDX-FileCopyrightText: 2020 Niccolò Venerandi <niccolo@venerandi.com>
+"""
+import sys
+from lxml import etree
+"""
+This is a template for making scripts that modify SVGs by parsing XML.
+"""
+
+# These are needed to prevent nonsense namespaces like ns0 from being
+# added to otherwise perfectly fine svg elements and attributes
+etree.register_namespace("w3c", "http://www.w3.org/2000/svg")
+etree.register_namespace("xlink", "http://www.w3.org/1999/xlink")
+etree.register_namespace("inkscape", "http://www.inkscape.org/namespaces/inkscape")
+etree.register_namespace("dc", "http://purl.org/dc/elements/1.1/")
+etree.register_namespace("cc", "http://creativecommons.org/ns#")
+etree.register_namespace("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#")
+etree.register_namespace("sodipodi", "http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd")
+
+# Get filenames as arguments. Combine with your favorite CLI tools.
+# My favorites are rg (aka ripgrep) and fd (aka fd-find).
+# Remember to filter out files that are not SVGs!
+# Example: ./this-script.py $(rg -t svg -l 'height="0"')
+for f in sys.argv[1:]:
+    tree = etree.parse(f)
+    root = tree.getroot()
+    wasEdited = False
+
+    # BEGIN section
+    # Reimplement this section as needed
+    # {http://www.w3.org/2000/svg} is needed to find SVG elements
+    # Example: find all rect elements
+    for elem in root.iterfind(".//{http://www.w3.org/2000/svg}rect"):
+        # Example: find rect elements where height="0"
+        if (elem.get("height") == "0"):
+            # Example: remove rect elements that have height="0"
+            elem.getparent().remove(elem)
+            wasEdited = True  # Remember to keep this
+    # END section
+
+    print(f + ": " + ("edited" if wasEdited else "ignored"))
+    if wasEdited:
+        tree.write(f, encoding="utf-8", xml_declaration=False, method="xml")