Mojo JS bindings: support auto-loading mojom.js deps.

mojo/public/tools/bindings/generators/mojom_js_generator.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generates JavaScript source files from a mojom.Module."""
 
 import mojom.generate.generator as generator
 import mojom.generate.module as mojom
 import mojom.generate.pack as pack
+import os
 from mojom.generate.template_expander import UseJinja
 
 _kind_to_javascript_default_value = {
   mojom.BOOL:                  "false",
   mojom.INT8:                  "0",
   mojom.UINT8:                 "0",
   mojom.INT16:                 "0",
   mojom.UINT16:                "0",
   mojom.INT32:                 "0",
   mojom.UINT32:                "0",
@@ skipping 297 matching lines @@
 
 def IsObjectField(field):
   return mojom.IsObjectKind(field.kind)
 
 def IsAnyHandleOrInterfaceField(field):
   return mojom.IsAnyHandleOrInterfaceKind(field.kind)
 
 def IsEnumField(field):
   return mojom.IsEnumKind(field.kind)
 
+def GetRelativePath(module, base_module):
+  return os.path.relpath(module.path, os.path.dirname(base_module.path))
+
 
 class Generator(generator.Generator):
 
   js_filters = {
     "decode_snippet": JavaScriptDecodeSnippet,
     "default_value": JavaScriptDefaultValue,
     "encode_snippet": JavaScriptEncodeSnippet,
     "expression_to_text": ExpressionToText,
     "field_offset": JavaScriptFieldOffset,
     "has_callbacks": mojom.HasCallbacks,
     "is_any_handle_or_interface_field": IsAnyHandleOrInterfaceField,
     "is_array_pointer_field": IsArrayPointerField,
     "is_bool_field": IsBoolField,
     "is_enum_field": IsEnumField,
     "is_handle_field": IsHandleField,
     "is_interface_field": IsInterfaceField,
     "is_interface_request_field": IsInterfaceRequestField,
     "is_map_pointer_field": IsMapPointerField,
     "is_object_field": IsObjectField,
     "is_string_pointer_field": IsStringPointerField,
     "is_struct_pointer_field": IsStructPointerField,
     "is_union_field": IsUnionField,
     "js_type": JavaScriptType,
     "payload_size": JavaScriptPayloadSize,
+    "get_relative_path": GetRelativePath,
     "stylize_method": generator.StudlyCapsToCamel,
     "union_decode_snippet": JavaScriptUnionDecodeSnippet,
     "union_encode_snippet": JavaScriptUnionEncodeSnippet,
     "validate_array_params": JavaScriptValidateArrayParams,
     "validate_enum_params": JavaScriptValidateEnumParams,
     "validate_map_params": JavaScriptValidateMapParams,
     "validate_nullable_params": JavaScriptNullableParam,
     "validate_struct_params": JavaScriptValidateStructParams,
     "validate_union_params": JavaScriptValidateUnionParams,
   }
@@ skipping 50 matching lines @@
     return self.module.imports
 
   def GetImportedInterfaces(self):
     interface_to_import = {};
     for each_import in self.module.imports:
       for each_interface in each_import["module"].interfaces:
         name = each_interface.name
         interface_to_import[name] = each_import["unique_name"] + "." + name
     return interface_to_import;