Make feature creation compatible with features.py.

Specifically the "mark" and "mkmk" features.

1 files changed, 17 insertions, 0 deletions

diff --git a/scripts/lib/fontbuild/features.py b/scripts/lib/fontbuild/features.py
index 3b52f76..2de484d 100755
--- a/scripts/lib/fontbuild/features.py
+++ b/scripts/lib/fontbuild/features.py
@@ -150,6 +150,23 @@ class FilterFeatureWriter(FDKSyntaxFeatureWriter):
             super(FilterFeatureWriter, self).languageSystem(langTag, scriptTag)

 

 

+def compileFeatureRE(name):

+    """Compiles a feature-matching regex using feaTool's template."""

+    featureRE = list(parser.featureContentRE)

+    featureRE.insert(2, name)

+    featureRE.insert(6, name)

+    return re.compile("".join(featureRE))

+

+

+def updateFeature(font, name, value):

+    """Add a feature definition, or replace existing one."""

+    featureRE = compileFeatureRE(name)

+    if featureRE.search(font.features.text):

+        font.features.text = featureRE.sub(value, font.features.text)

+    else:

+        font.features.text += "\n" + value

+

+

 def readFeatureFile(font, text):

     """Incorporate valid definitions from feature text into font."""

     writer = FilterFeatureWriter(set(font.keys()))