summaryrefslogtreecommitdiffstats
path: root/dom/bindings/GenerateCSS2PropertiesWebIDL.py
diff options
context:
space:
mode:
Diffstat (limited to 'dom/bindings/GenerateCSS2PropertiesWebIDL.py')
-rw-r--r--dom/bindings/GenerateCSS2PropertiesWebIDL.py84
1 files changed, 84 insertions, 0 deletions
diff --git a/dom/bindings/GenerateCSS2PropertiesWebIDL.py b/dom/bindings/GenerateCSS2PropertiesWebIDL.py
new file mode 100644
index 000000000..58ec60c29
--- /dev/null
+++ b/dom/bindings/GenerateCSS2PropertiesWebIDL.py
@@ -0,0 +1,84 @@
+# 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 sys
+import string
+import argparse
+import subprocess
+import buildconfig
+from mozbuild import shellutil
+
+# Generates a line of WebIDL with the given spelling of the property name
+# (whether camelCase, _underscorePrefixed, etc.) and the given array of
+# extended attributes.
+def generateLine(propName, extendedAttrs):
+ return " [%s] attribute DOMString %s;\n" % (", ".join(extendedAttrs),
+ propName)
+def generate(output, idlFilename, preprocessorHeader):
+ cpp = list(buildconfig.substs['CPP'])
+ cpp += shellutil.split(buildconfig.substs['ACDEFINES'])
+ cpp.append(preprocessorHeader)
+ preprocessed = subprocess.check_output(cpp)
+
+ propList = eval(preprocessed)
+ props = ""
+ for [name, prop, id, flags, pref, proptype] in propList:
+ if "CSS_PROPERTY_INTERNAL" in flags:
+ continue
+ # Unfortunately, even some of the getters here are fallible
+ # (e.g. on nsComputedDOMStyle).
+ extendedAttrs = ["Throws", "TreatNullAs=EmptyString"]
+ if pref is not "":
+ extendedAttrs.append('Pref="%s"' % pref)
+
+ # webkit properties get a capitalized "WebkitFoo" accessor (added here)
+ # as well as a camelcase "webkitFoo" accessor (added next).
+ if (prop.startswith("Webkit")):
+ props += generateLine(prop, extendedAttrs)
+
+ # Generate a line with camelCase spelling of property-name (or capitalized,
+ # for Moz-prefixed properties):
+ if not prop.startswith("Moz"):
+ prop = prop[0].lower() + prop[1:]
+ props += generateLine(prop, extendedAttrs)
+
+ # Per spec, what's actually supposed to happen here is that we're supposed
+ # to have properties for:
+ #
+ # 1) Each supported CSS property name, camelCased.
+ # 2) Each supported name that contains or starts with dashes,
+ # without any changes to the name.
+ # 3) cssFloat
+ #
+ # Note that "float" will cause a property called "float" to exist due to (1)
+ # in that list.
+ #
+ # In practice, cssFloat is the only case in which "name" doesn't contain
+ # "-" but also doesn't match "prop". So the above generatePropLine() call
+ # covered (3) and all of (1) except "float". If we now output attributes
+ # for all the cases where "name" doesn't match "prop", that will cover
+ # "float" and (2).
+ if prop != name:
+ extendedAttrs.append('BinaryName="%s"' % prop)
+ # Throw in a '_' before the attribute name, because some of these
+ # property names collide with IDL reserved words.
+ props += generateLine("_" + name, extendedAttrs)
+
+
+ idlFile = open(idlFilename, "r")
+ idlTemplate = idlFile.read()
+ idlFile.close()
+
+ output.write("/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */\n\n" +
+ string.Template(idlTemplate).substitute({"props": props}) + '\n')
+
+def main():
+ parser = argparse.ArgumentParser()
+ parser.add_argument('idlFilename', help='IDL property file template')
+ parser.add_argument('preprocessorHeader', help='Header file to pass through the preprocessor')
+ args = parser.parse_args()
+ generate(sys.stdout, args.idlFilename, args.preprocessorHeader)
+
+if __name__ == '__main__':
+ main()