1 files changed, 138 insertions, 0 deletions
diff --git a/layout/style/GenerateServoCSSPropList.py b/layout/style/GenerateServoCSSPropList.py
new file mode 100644
index 0000000000..7eb130b915
--- /dev/null
+++ b/layout/style/GenerateServoCSSPropList.py
@@ -0,0 +1,138 @@
+# 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 buildconfig
+import mozpack.path as mozpath
+import os
+import runpy
+import subprocess
+import string
+import sys
+
+SERVO_BASE = mozpath.join(buildconfig.topsrcdir, "servo")
+SERVO_PROP_BASE = mozpath.join(SERVO_BASE, "components", "style", "properties")
+
+
+def generate_data(output, template):
+    output.write("# THIS IS AN AUTOGENERATED FILE.  DO NOT EDIT\n\n")
+    output.write(
+        subprocess.check_output(
+            [
+                sys.executable,
+                mozpath.join(SERVO_PROP_BASE, "build.py"),
+                "gecko",
+                "geckolib",
+                template,
+            ],
+            universal_newlines=True,
+        )
+    )
+
+    # Add all relevant files into the dependencies of the generated file.
+    DEP_EXTS = [".py", ".rs", ".zip"]
+    deps = set()
+    for path, dirs, files in os.walk(SERVO_PROP_BASE):
+        for file in files:
+            if os.path.splitext(file)[1] in DEP_EXTS:
+                deps.add(mozpath.join(path, file))
+    return deps
+
+
+def generate_header(output, data):
+    data = runpy.run_path(data)["data"]
+
+    output.write(
+        """/* THIS IS AN AUTOGENERATED FILE.  DO NOT EDIT */
+
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+#define CSS_PROP_DOMPROP_PREFIXED(name_) \\
+  CSS_PROP_PUBLIC_OR_PRIVATE(Moz ## name_, name_)
+
+#ifndef CSS_PROP_LONGHAND
+#define CSS_PROP_LONGHAND(name_, id_, method_, flags_, pref_) /* nothing */
+#define DEFINED_CSS_PROP_LONGHAND
+#endif
+
+#ifndef CSS_PROP_SHORTHAND
+#define CSS_PROP_SHORTHAND(name_, id_, method_, flags_, pref_) /* nothing */
+#define DEFINED_CSS_PROP_SHORTHAND
+#endif
+
+#ifndef CSS_PROP_ALIAS
+#define CSS_PROP_ALIAS(name_, aliasid_, id_, method_, flags_, pref_) /* nothing */
+#define DEFINED_CSS_PROP_ALIAS
+#endif
+
+"""
+    )
+
+    # Some flags are only used for code generation, so we don't need to
+    # expose them to runtime.
+    COMPILE_TIME_FLAGS = {"ExposedOnGetCS"}
+
+    MACRO_NAMES = {
+        "longhand": "CSS_PROP_LONGHAND",
+        "shorthand": "CSS_PROP_SHORTHAND",
+        "alias": "CSS_PROP_ALIAS",
+    }
+    for prop in data:
+        is_internal = "Internal" in prop.flags
+        flags = " | ".join(
+            "CSSPropFlags::{}".format(flag)
+            for flag in prop.flags
+            if flag not in COMPILE_TIME_FLAGS
+        )
+        if not flags:
+            flags = "CSSPropFlags(0)"
+        pref = '"' + prop.pref + '"'
+        method = prop.method
+        if prop.type() == "alias":
+            params = [prop.name, prop.alias_id, prop.prop_id, method, flags, pref]
+        else:
+            if method == "CssFloat":
+                method = "CSS_PROP_PUBLIC_OR_PRIVATE(CssFloat, Float)"
+            elif method.startswith("Moz"):
+                method = "CSS_PROP_DOMPROP_PREFIXED({})".format(method[3:])
+            params = [prop.name, prop.id, method, flags, pref]
+        excludes = []
+        if is_internal:
+            excludes.append("CSS_PROP_LIST_EXCLUDE_INTERNAL")
+        if "Style" not in prop.rules:
+            excludes.append("CSS_PROP_LIST_EXCLUDE_NOT_IN_STYLE")
+
+        if excludes:
+            output.write(
+                "#if {}\n".format(
+                    " || ".join("!defined " + exclude for exclude in excludes)
+                )
+            )
+        output.write("{}({})\n".format(MACRO_NAMES[prop.type()], ", ".join(params)))
+        if excludes:
+            output.write("#endif\n")
+
+    output.write(
+        """
+#ifdef DEFINED_CSS_PROP_ALIAS
+#undef CSS_PROP_ALIAS
+#undef DEFINED_CSS_PROP_ALIAS
+#endif
+
+#ifdef DEFINED_CSS_PROP_SHORTHAND
+#undef CSS_PROP_SHORTHAND
+#undef DEFINED_CSS_PROP_SHORTHAND
+#endif
+
+#ifdef DEFINED_CSS_PROP_LONGHAND
+#undef CSS_PROP_LONGHAND
+#undef DEFINED_CSS_PROP_LONGHAND
+#endif
+
+#undef CSS_PROP_DOMPROP_PREFIXED
+"""
+    )