1 files changed, 40 insertions, 0 deletions
diff --git a/layout/style/GenerateCSSPropertyID.py b/layout/style/GenerateCSSPropertyID.py
new file mode 100644
index 0000000000..d2e212b2ca
--- /dev/null
+++ b/layout/style/GenerateCSSPropertyID.py
@@ -0,0 +1,40 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import runpy
+import string
+
+
+def generate(output, template, dataFile):
+    with open(template, "r") as f:
+        template = string.Template(f.read())
+    data = runpy.run_path(dataFile)["data"]
+
+    longhand_count = 0
+    shorthand_count = 0
+    alias_count = 0
+    property_ids = []
+    for prop in data:
+        if prop.type() != "alias":
+            if prop.type() == "longhand":
+                assert shorthand_count == 0
+                longhand_count += 1
+            else:
+                assert alias_count == 0
+                shorthand_count += 1
+            property_ids.append("eCSSProperty_{}".format(prop.id))
+        else:
+            alias_count += 1
+            property_ids.append("eCSSPropertyAlias_{}".format(prop.alias_id))
+
+    output.write("/* THIS IS AN AUTOGENERATED FILE.  DO NOT EDIT */\n\n")
+    output.write(
+        template.substitute(
+            {
+                "property_ids": "\n".join("  {},".format(p) for p in property_ids),
+                "longhand_count": property_ids[longhand_count],
+                "shorthand_count": property_ids[longhand_count + shorthand_count],
+            }
+        )
+    )