Add a new bindings2/scripts directory for Dart bindings

sky/engine/bindings2/scripts/dart_compiler.py

+#!/usr/bin/python
+# Copyright (C) 2013 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Compile an .idl file to Blink C++ bindings (.h and .cpp files) for Dart:HTML.
+
+Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
+"""
+
+import abc
+import os.path
+import cPickle as pickle
+
+from idl_reader import IdlReader
+from utilities import write_file
+
+
+def idl_filename_to_interface_name(idl_filename):
+    basename = os.path.basename(idl_filename)
+    interface_name, _ = os.path.splitext(basename)
+    return interface_name
+
+
+class IdlCompiler(object):
+    """Abstract Base Class for IDL compilers.
+
+    In concrete classes:
+    * self.code_generator must be set, implementing generate_code()
+      (returning a list of output code), and
+    * compile_file() must be implemented (handling output filenames).
+    """
+    __metaclass__ = abc.ABCMeta
+
+    def __init__(self, output_directory, code_generator=None,
+                 interfaces_info=None, interfaces_info_filename='',
+                 only_if_changed=False):
+        """
+        Args:
+            interfaces_info:
+                interfaces_info dict
+                (avoids auxiliary file in run-bindings-tests)
+            interfaces_info_file: filename of pickled interfaces_info
+        """
+        self.code_generator = code_generator
+        if interfaces_info_filename:
+            with open(interfaces_info_filename) as interfaces_info_file:
+                interfaces_info = pickle.load(interfaces_info_file)
+        self.interfaces_info = interfaces_info
+
+        self.only_if_changed = only_if_changed
+        self.output_directory = output_directory
+        self.reader = IdlReader(interfaces_info, output_directory)
+
+    def compile_and_write(self, idl_filename, output_filenames):
+        interface_name = idl_filename_to_interface_name(idl_filename)
+        idl_pickle_filename = os.path.join(self.output_directory,
+                                           '%s_globals.pickle' % interface_name)
+        definitions = self.reader.read_idl_definitions(idl_filename)
+        output_code_list = self.code_generator.generate_code(definitions,
+                                                             interface_name,
+                                                             idl_pickle_filename,
+                                                             self.only_if_changed)
+
+        for output_code, output_filename in zip(output_code_list, output_filenames):
+            write_file(output_code, output_filename, self.only_if_changed)
+
+    def generate_global_and_write(self, global_entries, output_filenames):
+        output_code_list = self.code_generator.generate_globals(global_entries)
+        for output_code, output_filename in zip(output_code_list, output_filenames):
+            write_file(output_code, output_filename, self.only_if_changed)
+
+    def generate_dart_blink_and_write(self, global_entries, output_filename):
+        output_code = self.code_generator.generate_dart_blink(global_entries)
+        write_file(output_code, output_filename, self.only_if_changed)
+
+    @abc.abstractmethod
+    def compile_file(self, idl_filename):
+        pass