Home | History | Annotate | Download | only in modules 
      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "gin/modules/file_module_provider.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/file_util.h"
      9 #include "base/message_loop/message_loop.h"
     10 #include "base/strings/string_split.h"
     11 #include "gin/converter.h"
     12 
     13 namespace gin {
     14 
     15 namespace {
     16 
     17 void AttempToLoadModule(const base::WeakPtr<Runner>& runner,
     18                         const std::vector<base::FilePath>& search_paths,
     19                         const std::string& id) {
     20   if (!runner)
     21     return;
     22 
     23   std::vector<std::string> components;
     24   base::SplitString(id, '/', &components);
     25 
     26   base::FilePath path;
     27   for (size_t i = 0; i < components.size(); ++i) {
     28     // TODO(abarth): Technically the path components can be UTF-8. We don't
     29     // handle that case correctly yet.
     30     path = path.AppendASCII(components[i]);
     31   }
     32   path = path.AddExtension(FILE_PATH_LITERAL("js"));
     33 
     34   for (size_t i = 0; i < search_paths.size(); ++i) {
     35     std::string source;
     36     if (!ReadFileToString(search_paths[i].Append(path), &source))
     37       continue;
     38 
     39     Runner::Scope scope(runner.get());
     40     v8::Handle<v8::Script> script = v8::Script::New(
     41         StringToV8(runner->isolate(), source),
     42         StringToV8(runner->isolate(), id));
     43     runner->Run(script);
     44     return;
     45   }
     46 }
     47 
     48 }  // namespace
     49 
     50 FileModuleProvider::FileModuleProvider(
     51     const std::vector<base::FilePath>& search_paths)
     52     : search_paths_(search_paths) {
     53 }
     54 
     55 FileModuleProvider::~FileModuleProvider() {
     56 }
     57 
     58 void FileModuleProvider::AttempToLoadModules(
     59     Runner* runner, const std::set<std::string>& ids) {
     60   std::set<std::string> modules = ids;
     61   for (std::set<std::string>::const_iterator it = modules.begin();
     62        it != modules.end(); ++it) {
     63     const std::string& id = *it;
     64     if (attempted_ids_.count(id))
     65       continue;
     66     attempted_ids_.insert(id);
     67     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
     68         AttempToLoadModule, runner->GetWeakPtr(), search_paths_, id));
     69   }
     70 }
     71 
     72 }  // namespace gin
     73