1 files changed, 114 insertions, 0 deletions
diff --git a/layout/style/GenerateCSSPropsGenerated.py b/layout/style/GenerateCSSPropsGenerated.py
new file mode 100644
index 0000000000..d217fce0c5
--- /dev/null
+++ b/layout/style/GenerateCSSPropsGenerated.py
@@ -0,0 +1,114 @@
+# 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 sys
+import string
+import argparse
+
+
+class PropertyWrapper(object):
+    __slots__ = ["index", "prop", "idlname"]
+
+    def __init__(self, index, prop):
+        self.index = index
+        self.prop = prop
+        if "Internal" in prop.flags:
+            self.idlname = None
+        else:
+            idl_name = prop.method
+            if not idl_name.startswith("Moz"):
+                idl_name = idl_name[0].lower() + idl_name[1:]
+            self.idlname = idl_name
+
+    def __getattr__(self, name):
+        return getattr(self.prop, name)
+
+
+def generate(output, dataFile):
+    output.write(
+        """/* THIS IS AN AUTOGENERATED FILE.  DO NOT EDIT */
+
+/* processed file that defines CSS property tables that can't be generated
+   with the pre-processor, designed to be #included in nsCSSProps.cpp */
+
+"""
+    )
+
+    raw_properties = runpy.run_path(dataFile)["data"]
+    properties = [
+        PropertyWrapper(i, p)
+        for i, p in enumerate(raw_properties)
+        if p.type() != "alias"
+    ]
+
+    # Generate kIDLNameTable
+    output.write(
+        "const char* const nsCSSProps::" "kIDLNameTable[eCSSProperty_COUNT] = {\n"
+    )
+    for p in properties:
+        if p.idlname is None:
+            output.write("  nullptr,  // {}\n".format(p.name))
+        else:
+            output.write('  "{}",\n'.format(p.idlname))
+    output.write("};\n\n")
+
+    # Generate kIDLNameSortPositionTable
+    ps = sorted(properties, key=lambda p: p.idlname if p.idlname else "")
+    ps = [(p, position) for position, p in enumerate(ps)]
+    ps.sort(key=lambda item: item[0].index)
+    output.write(
+        "const int32_t nsCSSProps::"
+        "kIDLNameSortPositionTable[eCSSProperty_COUNT] = {\n"
+    )
+    for (p, position) in ps:
+        output.write("  {},\n".format(position))
+    output.write("};\n\n")
+
+    # Generate preferences table
+    output.write(
+        "const nsCSSProps::PropertyPref " "nsCSSProps::kPropertyPrefTable[] = {\n"
+    )
+    for p in raw_properties:
+        if not p.pref:
+            continue
+        if p.type() != "alias":
+            prop_id = "eCSSProperty_" + p.id
+        else:
+            prop_id = "eCSSPropertyAlias_" + p.alias_id
+        output.write('  {{ {}, "{}" }},\n'.format(prop_id, p.pref))
+    output.write("  { eCSSProperty_UNKNOWN, nullptr },\n")
+    output.write("};\n\n")
+
+    # Generate shorthand subprop tables
+    names = []
+    for p in properties:
+        if p.type() != "shorthand":
+            continue
+        name = "g{}SubpropTable".format(p.method)
+        names.append(name)
+        output.write("static const nsCSSPropertyID {}[] = {{\n".format(name))
+        for subprop in p.subprops:
+            output.write("  eCSSProperty_{},\n".format(subprop))
+        output.write("  eCSSProperty_UNKNOWN\n")
+        output.write("};\n\n")
+    output.write("const nsCSSPropertyID* const\n")
+    output.write(
+        "nsCSSProps::kSubpropertyTable["
+        "eCSSProperty_COUNT - eCSSProperty_COUNT_no_shorthands"
+        "] = {\n"
+    )
+    for name in names:
+        output.write("  {},\n".format(name))
+    output.write("};\n\n")
+
+    # Generate assertions
+    msg = (
+        "GenerateCSSPropsGenerated.py did not list properties "
+        "in nsCSSPropertyID order"
+    )
+    for p in properties:
+        output.write(
+            'static_assert(eCSSProperty_{} == {}, "{}");\n'.format(p.id, p.index, msg)
+        )