| # Copyright (c) 2012 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. |
| |
| import code |
| import cpp_util |
| from model import Platforms |
| from schema_util import CapitalizeFirstLetter |
| from schema_util import JsFunctionNameToClassName |
| |
| import json |
| import os |
| import re |
| |
| |
| def _RemoveDescriptions(node): |
| """Returns a copy of |schema| with "description" fields removed. |
| """ |
| if isinstance(node, dict): |
| result = {} |
| for key, value in node.items(): |
| # Some schemas actually have properties called "description", so only |
| # remove descriptions that have string values. |
| if key == 'description' and isinstance(value, basestring): |
| continue |
| result[key] = _RemoveDescriptions(value) |
| return result |
| if isinstance(node, list): |
| return [_RemoveDescriptions(v) for v in node] |
| return node |
| |
| |
| class CppBundleGenerator(object): |
| """This class contains methods to generate code based on multiple schemas. |
| """ |
| |
| def __init__(self, |
| root, |
| model, |
| api_defs, |
| cpp_type_generator, |
| cpp_namespace_pattern, |
| bundle_name, |
| source_file_dir, |
| impl_dir): |
| self._root = root |
| self._model = model |
| self._api_defs = api_defs |
| self._cpp_type_generator = cpp_type_generator |
| self._bundle_name = bundle_name |
| self._source_file_dir = source_file_dir |
| self._impl_dir = impl_dir |
| |
| # Hack: assume that the C++ namespace for the bundle is the namespace of the |
| # files without the last component of the namespace. A cleaner way to do |
| # this would be to make it a separate variable in the gyp file. |
| self._cpp_namespace = cpp_namespace_pattern.rsplit('::', 1)[0] |
| |
| self.api_cc_generator = _APICCGenerator(self) |
| self.api_h_generator = _APIHGenerator(self) |
| self.schemas_cc_generator = _SchemasCCGenerator(self) |
| self.schemas_h_generator = _SchemasHGenerator(self) |
| |
| def _GenerateHeader(self, file_base, body_code): |
| """Generates a code.Code object for a header file |
| |
| Parameters: |
| - |file_base| - the base of the filename, e.g. 'foo' (for 'foo.h') |
| - |body_code| - the code to put in between the multiple inclusion guards""" |
| c = code.Code() |
| c.Append(cpp_util.CHROMIUM_LICENSE) |
| c.Append() |
| c.Append(cpp_util.GENERATED_BUNDLE_FILE_MESSAGE % self._source_file_dir) |
| ifndef_name = cpp_util.GenerateIfndefName( |
| '%s/%s.h' % (self._source_file_dir, file_base)) |
| c.Append() |
| c.Append('#ifndef %s' % ifndef_name) |
| c.Append('#define %s' % ifndef_name) |
| c.Append() |
| c.Concat(body_code) |
| c.Append() |
| c.Append('#endif // %s' % ifndef_name) |
| c.Append() |
| return c |
| |
| def _GetPlatformIfdefs(self, model_object): |
| """Generates the "defined" conditional for an #if check if |model_object| |
| has platform restrictions. Returns None if there are no restrictions. |
| """ |
| if model_object.platforms is None: |
| return None |
| ifdefs = [] |
| for platform in model_object.platforms: |
| if platform == Platforms.CHROMEOS: |
| ifdefs.append('defined(OS_CHROMEOS)') |
| elif platform == Platforms.LINUX: |
| ifdefs.append('defined(OS_LINUX)') |
| elif platform == Platforms.MAC: |
| ifdefs.append('defined(OS_MACOSX)') |
| elif platform == Platforms.WIN: |
| ifdefs.append('defined(OS_WIN)') |
| else: |
| raise ValueError("Unsupported platform ifdef: %s" % platform.name) |
| return ' || '.join(ifdefs) |
| |
| def _GenerateRegisterFunctions(self, namespace_name, function): |
| c = code.Code() |
| function_ifdefs = self._GetPlatformIfdefs(function) |
| if function_ifdefs is not None: |
| c.Append("#if %s" % function_ifdefs, indent_level=0) |
| |
| function_name = JsFunctionNameToClassName(namespace_name, function.name) |
| c.Append("registry->RegisterFunction<%sFunction>();" % ( |
| function_name)) |
| |
| if function_ifdefs is not None: |
| c.Append("#endif // %s" % function_ifdefs, indent_level=0) |
| return c |
| |
| def _GenerateFunctionRegistryRegisterAll(self): |
| c = code.Code() |
| c.Append('// static') |
| c.Sblock('void %s::RegisterAll(ExtensionFunctionRegistry* registry) {' % |
| self._GenerateBundleClass('GeneratedFunctionRegistry')) |
| for namespace in self._model.namespaces.values(): |
| namespace_ifdefs = self._GetPlatformIfdefs(namespace) |
| if namespace_ifdefs is not None: |
| c.Append("#if %s" % namespace_ifdefs, indent_level=0) |
| |
| for function in namespace.functions.values(): |
| if function.nocompile: |
| continue |
| c.Concat(self._GenerateRegisterFunctions(namespace.name, function)) |
| |
| for type_ in namespace.types.values(): |
| for function in type_.functions.values(): |
| if function.nocompile: |
| continue |
| namespace_types_name = JsFunctionNameToClassName( |
| namespace.name, type_.name) |
| c.Concat(self._GenerateRegisterFunctions(namespace_types_name, |
| function)) |
| |
| if namespace_ifdefs is not None: |
| c.Append("#endif // %s" % namespace_ifdefs, indent_level=0) |
| c.Eblock("}") |
| return c |
| |
| def _GenerateBundleClass(self, class_name): |
| '''Generates the C++ class name to use for a bundle class, taking into |
| account the bundle's name. |
| ''' |
| return self._bundle_name + class_name |
| |
| |
| class _APIHGenerator(object): |
| """Generates the header for API registration / declaration""" |
| def __init__(self, cpp_bundle): |
| self._bundle = cpp_bundle |
| |
| def Generate(self, _): # namespace not relevant, this is a bundle |
| c = code.Code() |
| |
| c.Append('#include <string>') |
| c.Append() |
| c.Append('#include "base/basictypes.h"') |
| c.Append() |
| c.Append("class ExtensionFunctionRegistry;") |
| c.Append() |
| c.Concat(cpp_util.OpenNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| c.Append('class %s {' % |
| self._bundle._GenerateBundleClass('GeneratedFunctionRegistry')) |
| c.Sblock(' public:') |
| c.Append('static void RegisterAll(' |
| 'ExtensionFunctionRegistry* registry);') |
| c.Eblock('};') |
| c.Append() |
| c.Concat(cpp_util.CloseNamespace(self._bundle._cpp_namespace)) |
| return self._bundle._GenerateHeader('generated_api', c) |
| |
| |
| class _APICCGenerator(object): |
| """Generates a code.Code object for the generated API .cc file""" |
| |
| def __init__(self, cpp_bundle): |
| self._bundle = cpp_bundle |
| |
| def Generate(self, _): # namespace not relevant, this is a bundle |
| c = code.Code() |
| c.Append(cpp_util.CHROMIUM_LICENSE) |
| c.Append() |
| c.Append('#include "%s"' % ( |
| os.path.join(self._bundle._impl_dir, |
| 'generated_api_registration.h'))) |
| c.Append() |
| for namespace in self._bundle._model.namespaces.values(): |
| namespace_name = namespace.unix_name.replace("experimental_", "") |
| implementation_header = namespace.compiler_options.get( |
| "implemented_in", |
| "%s/%s/%s_api.h" % (self._bundle._impl_dir, |
| namespace_name, |
| namespace_name)) |
| if not os.path.exists( |
| os.path.join(self._bundle._root, |
| os.path.normpath(implementation_header))): |
| if "implemented_in" in namespace.compiler_options: |
| raise ValueError('Header file for namespace "%s" specified in ' |
| 'compiler_options not found: %s' % |
| (namespace.unix_name, implementation_header)) |
| continue |
| ifdefs = self._bundle._GetPlatformIfdefs(namespace) |
| if ifdefs is not None: |
| c.Append("#if %s" % ifdefs, indent_level=0) |
| |
| c.Append('#include "%s"' % implementation_header) |
| |
| if ifdefs is not None: |
| c.Append("#endif // %s" % ifdefs, indent_level=0) |
| c.Append() |
| c.Append('#include ' |
| '"extensions/browser/extension_function_registry.h"') |
| c.Append() |
| c.Concat(cpp_util.OpenNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| c.Concat(self._bundle._GenerateFunctionRegistryRegisterAll()) |
| c.Append() |
| c.Concat(cpp_util.CloseNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| return c |
| |
| |
| class _SchemasHGenerator(object): |
| """Generates a code.Code object for the generated schemas .h file""" |
| def __init__(self, cpp_bundle): |
| self._bundle = cpp_bundle |
| |
| def Generate(self, _): # namespace not relevant, this is a bundle |
| c = code.Code() |
| c.Append('#include <map>') |
| c.Append('#include <string>') |
| c.Append() |
| c.Append('#include "base/strings/string_piece.h"') |
| c.Append() |
| c.Concat(cpp_util.OpenNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| c.Append('class %s {' % |
| self._bundle._GenerateBundleClass('GeneratedSchemas')) |
| c.Sblock(' public:') |
| c.Append('// Determines if schema named |name| is generated.') |
| c.Append('static bool IsGenerated(std::string name);') |
| c.Append() |
| c.Append('// Gets the API schema named |name|.') |
| c.Append('static base::StringPiece Get(const std::string& name);') |
| c.Eblock('};') |
| c.Append() |
| c.Concat(cpp_util.CloseNamespace(self._bundle._cpp_namespace)) |
| return self._bundle._GenerateHeader('generated_schemas', c) |
| |
| |
| def _FormatNameAsConstant(name): |
| """Formats a name to be a C++ constant of the form kConstantName""" |
| name = '%s%s' % (name[0].upper(), name[1:]) |
| return 'k%s' % re.sub('_[a-z]', |
| lambda m: m.group(0)[1].upper(), |
| name.replace('.', '_')) |
| |
| |
| class _SchemasCCGenerator(object): |
| """Generates a code.Code object for the generated schemas .cc file""" |
| |
| def __init__(self, cpp_bundle): |
| self._bundle = cpp_bundle |
| |
| def Generate(self, _): # namespace not relevant, this is a bundle |
| c = code.Code() |
| c.Append(cpp_util.CHROMIUM_LICENSE) |
| c.Append() |
| c.Append('#include "%s"' % (os.path.join(self._bundle._source_file_dir, |
| 'generated_schemas.h'))) |
| c.Append() |
| c.Append('#include "base/lazy_instance.h"') |
| c.Append() |
| c.Append('namespace {') |
| for api in self._bundle._api_defs: |
| namespace = self._bundle._model.namespaces[api.get('namespace')] |
| # JSON parsing code expects lists of schemas, so dump a singleton list. |
| json_content = json.dumps([_RemoveDescriptions(api)], |
| separators=(',', ':')) |
| # Escape all double-quotes and backslashes. For this to output a valid |
| # JSON C string, we need to escape \ and ". Note that some schemas are |
| # too large to compile on windows. Split the JSON up into several |
| # strings, since apparently that helps. |
| max_length = 8192 |
| segments = [json_content[i:i + max_length].replace('\\', '\\\\') |
| .replace('"', '\\"') |
| for i in xrange(0, len(json_content), max_length)] |
| c.Append('const char %s[] = "%s";' % |
| (_FormatNameAsConstant(namespace.name), '" "'.join(segments))) |
| c.Append() |
| c.Sblock('struct Static {') |
| c.Sblock('Static() {') |
| for api in self._bundle._api_defs: |
| namespace = self._bundle._model.namespaces[api.get('namespace')] |
| c.Append('schemas["%s"] = %s;' % (namespace.name, |
| _FormatNameAsConstant(namespace.name))) |
| c.Eblock('}') |
| c.Append() |
| c.Append('std::map<std::string, const char*> schemas;') |
| c.Eblock('};') |
| c.Append() |
| c.Append('base::LazyInstance<Static> g_lazy_instance;') |
| c.Append() |
| c.Append('} // namespace') |
| c.Append() |
| c.Concat(cpp_util.OpenNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| c.Append('// static') |
| c.Sblock('base::StringPiece %s::Get(const std::string& name) {' % |
| self._bundle._GenerateBundleClass('GeneratedSchemas')) |
| c.Append('return IsGenerated(name) ? ' |
| 'g_lazy_instance.Get().schemas[name] : "";') |
| c.Eblock('}') |
| c.Append() |
| c.Append('// static') |
| c.Sblock('bool %s::IsGenerated(std::string name) {' % |
| self._bundle._GenerateBundleClass('GeneratedSchemas')) |
| c.Append('return g_lazy_instance.Get().schemas.count(name) > 0;') |
| c.Eblock('}') |
| c.Append() |
| c.Concat(cpp_util.CloseNamespace(self._bundle._cpp_namespace)) |
| c.Append() |
| return c |
