Pepper's FileSystem implementation.

webkit/glue/plugins/pepper_file_system.cc

 // Copyright (c) 2010 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.
 
 #include "webkit/glue/plugins/pepper_file_system.h"
 
+#include "base/logging.h"
+#include "base/ref_counted.h"
+#include "base/weak_ptr.h"
 #include "third_party/ppapi/c/dev/ppb_file_system_dev.h"
 #include "third_party/ppapi/c/pp_completion_callback.h"
-#include "third_party/ppapi/c/pp_errors.h"
+#include "third_party/ppapi/c/pp_time.h"
+#include "webkit/fileapi/file_system_callback_dispatcher.h"
+#include "webkit/glue/plugins/pepper_resource.h"
+#include "webkit/glue/plugins/pepper_error_util.h"
+#include "webkit/glue/plugins/pepper_file_ref.h"
+#include "webkit/glue/plugins/pepper_plugin_delegate.h"
+#include "webkit/glue/plugins/pepper_plugin_instance.h"
+#include "webkit/glue/plugins/pepper_plugin_module.h"
+#include "webkit/glue/plugins/pepper_resource.h"
 
 namespace pepper {
 
 namespace {
 
-int32_t MakeDirectory(PP_Resource directory_ref,
+// Instances of this class are deleted when RunCallback() is called.
+class StatusCallback : public fileapi::FileSystemCallbackDispatcher {
+ public:
+  StatusCallback(base::WeakPtr<pepper::PluginModule> module,
+                 PP_CompletionCallback callback)
+      : module_(module),
+        callback_(callback) {
+  }
+
+  // FileSystemCallbackDispatcher implementation.
+  virtual void DidSucceed() {
+    RunCallback(base::PLATFORM_FILE_OK);
+  }
+
+  virtual void DidReadMetadata(const base::PlatformFileInfo&) {
+    NOTREACHED();
+  }
+
+  virtual void DidReadDirectory(
+      const std::vector<base::file_util_proxy::Entry>&, bool) {
+    NOTREACHED();
+  }
+
+  virtual void DidOpenFileSystem(const string16&, const FilePath&) {
+    NOTREACHED();
+  }
+
+  virtual void DidFail(base::PlatformFileError error_code) {
+    RunCallback(error_code);
+  }
+
+ private:
+  void RunCallback(base::PlatformFileError error_code) {
+    PP_CompletionCallback callback = {0};
+    std::swap(callback, callback_);

[brettw, 2010/09/23 19:35:56]

I don't think this swap is necessary in your case. I assume you copied this from
pepper_graphics_2d? That uses swap first because the presence or absence of the
callback indicates something and we want it to be empty when executing. In your
case, this object is standalone so I think you should just be able to call
RunCompletionCallback on callback_.

[dumi, 2010/09/23 22:31:40]

done.

+
+    if (!module_.get() || !callback.func)
+      return;
+
+    PP_RunCompletionCallback(
+        &callback, pepper::PlatformFileErrorToPepperError(error_code));
+
+    delete this;
+  }
+
+  base::WeakPtr<pepper::PluginModule> module_;
+  PP_CompletionCallback callback_;
+};
+
+// Instances of this class are deleted when RunCallback() is called.
+class QueryInfoCallback : public fileapi::FileSystemCallbackDispatcher {
+ public:
+  QueryInfoCallback(base::WeakPtr<pepper::PluginModule> module,
+                    PP_CompletionCallback callback,
+                    PP_FileInfo_Dev* info,
+                    PP_FileSystemType_Dev file_system_type)
+      : module_(module),
+        callback_(callback),
+        info_(info),
+        file_system_type_(file_system_type) {
+    DCHECK(info_);
+  }
+
+  // FileSystemCallbackDispatcher implementation.
+  virtual void DidSucceed() {
+    NOTREACHED();
+  }
+
+  virtual void DidReadMetadata(const base::PlatformFileInfo& file_info) {
+    RunCallback(base::PLATFORM_FILE_OK, file_info);
+  }
+
+  virtual void DidReadDirectory(
+      const std::vector<base::file_util_proxy::Entry>&, bool) {
+    NOTREACHED();
+  }
+
+  virtual void DidOpenFileSystem(const string16&, const FilePath&) {
+    NOTREACHED();
+  }
+
+  virtual void DidFail(base::PlatformFileError error_code) {
+    RunCallback(error_code, base::PlatformFileInfo());
+  }
+
+ private:
+  void RunCallback(base::PlatformFileError error_code,
+                   const base::PlatformFileInfo& file_info) {
+    PP_CompletionCallback callback = {0};
+    std::swap(callback, callback_);

[brettw, 2010/09/23 19:35:56]

Same swap comment as above.

[dumi, 2010/09/23 22:31:40]

done.

+
+    if (!module_.get() || !callback.func)
+      return;
+
+    if (error_code == base::PLATFORM_FILE_OK) {
+      info_->size = file_info.size;
+      info_->creation_time = file_info.creation_time.ToDoubleT();
+      info_->last_access_time = file_info.last_accessed.ToDoubleT();
+      info_->last_modified_time = file_info.last_modified.ToDoubleT();
+      info_->system_type = file_system_type_;
+      if (file_info.is_directory)
+        info_->type = PP_FILETYPE_DIRECTORY;
+      else
+        info_->type = PP_FILETYPE_REGULAR;
+    }
+    PP_RunCompletionCallback(
+        &callback, pepper::PlatformFileErrorToPepperError(error_code));
+
+    delete this;
+  }
+
+  base::WeakPtr<pepper::PluginModule> module_;
+  PP_CompletionCallback callback_;
+  PP_FileInfo_Dev* info_;
+  PP_FileSystemType_Dev file_system_type_;
+};
+
+int32_t MakeDirectory(PP_Resource directory_ref_id,
                       bool make_ancestors,
                       PP_CompletionCallback callback) {
-  return PP_ERROR_FAILED;  // TODO(darin): Implement me!
-}
-
-int32_t Query(PP_Resource file_ref,
+  scoped_refptr<FileRef> directory_ref(
+      Resource::GetAs<FileRef>(directory_ref_id));
+  if (!directory_ref)
+    return PP_ERROR_BADRESOURCE;
+
+  if (directory_ref->file_system_type() == PP_FILESYSTEMTYPE_EXTERNAL)
+    return PP_ERROR_FAILED;
+
+  PluginModule* module = directory_ref->module();
+  if (!module->GetSomeInstance()->delegate()->MakeDirectory(
+          directory_ref->system_path(), make_ancestors,
+          new StatusCallback(module->AsWeakPtr(), callback)))
+    return PP_ERROR_FAILED;
+
+  return PP_ERROR_WOULDBLOCK;
+}
+
+int32_t Query(PP_Resource file_ref_id,
               PP_FileInfo_Dev* info,
               PP_CompletionCallback callback) {
-  return PP_ERROR_FAILED;  // TODO(darin): Implement me!
-}
-
-int32_t Touch(PP_Resource file_ref,
+  scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
+  if (!file_ref)
+    return PP_ERROR_BADRESOURCE;
+
+  PluginModule* module = file_ref->module();
+  if (!module->GetSomeInstance()->delegate()->Query(
+          file_ref->system_path(),
+          new QueryInfoCallback(module->AsWeakPtr(), callback,
+                                info, file_ref->file_system_type())))
+    return PP_ERROR_FAILED;
+
+  return PP_ERROR_WOULDBLOCK;
+}
+
+int32_t Touch(PP_Resource file_ref_id,
               PP_Time last_access_time,
               PP_Time last_modified_time,
               PP_CompletionCallback callback) {
-  return PP_ERROR_FAILED;  // TODO(darin): Implement me!
-}
-
-int32_t Delete(PP_Resource file_ref,
+  scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
+  if (!file_ref)
+    return PP_ERROR_BADRESOURCE;
+
+  PluginModule* module = file_ref->module();
+  if (!module->GetSomeInstance()->delegate()->Touch(
+          file_ref->system_path(), base::Time::FromDoubleT(last_access_time),
+          base::Time::FromDoubleT(last_modified_time),
+          new StatusCallback(module->AsWeakPtr(), callback)))
+    return PP_ERROR_FAILED;
+
+  return PP_ERROR_WOULDBLOCK;
+}
+
+int32_t Delete(PP_Resource file_ref_id,
                PP_CompletionCallback callback) {
-  return PP_ERROR_FAILED;  // TODO(darin): Implement me!
-}
-
-int32_t Rename(PP_Resource file_ref,
-               PP_Resource new_file_ref,
+  scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
+  if (!file_ref)
+    return PP_ERROR_BADRESOURCE;
+
+  if (file_ref->file_system_type() == PP_FILESYSTEMTYPE_EXTERNAL)
+    return PP_ERROR_FAILED;
+
+  PluginModule* module = file_ref->module();
+  if (!module->GetSomeInstance()->delegate()->Delete(
+          file_ref->system_path(),
+          new StatusCallback(module->AsWeakPtr(), callback)))
+    return PP_ERROR_FAILED;
+
+  return PP_ERROR_WOULDBLOCK;
+}
+
+int32_t Rename(PP_Resource file_ref_id,
+               PP_Resource new_file_ref_id,
                PP_CompletionCallback callback) {
-  return PP_ERROR_FAILED;  // TODO(darin): Implement me!
+  scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
+  if (!file_ref)
+    return PP_ERROR_BADRESOURCE;
+
+  scoped_refptr<FileRef> new_file_ref(
+      Resource::GetAs<FileRef>(new_file_ref_id));
+  if (!new_file_ref)
+    return PP_ERROR_BADRESOURCE;
+
+
+  if ((file_ref->file_system_type() == PP_FILESYSTEMTYPE_EXTERNAL) ||

[brettw, 2010/09/23 19:35:56]

Remove extra blank line above here.

[dumi, 2010/09/23 22:31:40]

removed.

+      (file_ref->file_system_type() != new_file_ref->file_system_type()))
+    return PP_ERROR_FAILED;
+
+  PluginModule* module = file_ref->module();
+  if (!module->GetSomeInstance()->delegate()->Rename(
+          file_ref->system_path(), new_file_ref->system_path(),
+          new StatusCallback(module->AsWeakPtr(), callback)))
+    return PP_ERROR_FAILED;
+
+  return PP_ERROR_WOULDBLOCK;
 }
 
 const PPB_FileSystem_Dev ppb_filesystem = {
   &MakeDirectory,
   &Query,
   &Touch,
   &Delete,
   &Rename
 };
 
 }  // namespace
 
 const PPB_FileSystem_Dev* FileSystem::GetInterface() {
   return &ppb_filesystem;
 }
 
 }  // namespace pepper