Add existing to tracked

2026-08-11 09:53:42 -04:00
parent afe07f3055
commit ffd6e3d73c
8531 changed files with 4396230 additions and 0 deletions
@@ -0,0 +1,59 @@
+"""
+Helpers related to SVG conditional processing.
+
+"""
+
+import locale
+
+ROOT = 'http://www.w3.org/TR/SVG11/feature'
+LOCALE = locale.getlocale()[0] or ''
+SUPPORTED_FEATURES = frozenset((
+    ROOT + '#' + feature for feature in (
+        'SVG',
+        'SVG-static',
+        'CoreAttribute',
+        'Structure',
+        'BasicStructure',
+        'ConditionalProcessing',
+        'Image',
+        'Style',
+        'ViewportAttribute',
+        'Shape',
+        'BasicText',
+        'BasicPaintAttribute',
+        'OpacityAttribute',
+        'BasicGraphicsAttribute',
+        'Marker',
+        'Gradient',
+        'Pattern',
+        'Clip',
+        'BasicClip',
+        'Mask'
+    )))
+
+
+def has_features(features):
+    """Check whether ``features`` are supported by CairoSVG."""
+    return SUPPORTED_FEATURES >= set(features.strip().split(" "))
+
+
+def support_languages(languages):
+    """Check whether one of ``languages`` is part of the user locales."""
+    for language in languages.split(','):
+        language = language.strip()
+        if language and LOCALE.startswith(language):
+            return True
+    return False
+
+
+def match_features(node):
+    """Check the node match the conditional processing attributes."""
+    features = node.attrib.get('requiredFeatures')
+    languages = node.attrib.get('systemLanguage')
+    if 'requiredExtensions' in node.attrib:
+        return False
+    if features is not None and not has_features(features):
+        return False
+    if languages is not None and not support_languages(languages):
+        return False
+    return True