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// 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_ref.h"
#include "base/base_paths.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_var.h"
#include "webkit/glue/plugins/pepper_resource_tracker.h"
namespace pepper {
namespace {
bool IsValidLocalPath(const std::string& path) {
// The path must start with '/'
if (path.empty() || path[0] != '/')
return false;
// The path must contain valid UTF-8 characters.
if (!IsStringUTF8(path))
return false;
return true;
}
void TrimTrailingSlash(std::string* path) {
// If this path ends with a slash, then normalize it away unless path is the
// root path.
if (path->size() > 1 && path->at(path->size() - 1) == '/')
path->erase(path->size() - 1, 1);
}
PP_Resource CreateFileRef(PP_Instance instance_id,
PP_FileSystemType_Dev fs_type,
const char* path) {
PluginInstance* instance = PluginInstance::FromPPInstance(instance_id);
if (!instance)
return 0;
std::string origin; // TODO(darin): Extract from PluginInstance.
std::string validated_path(path);
if (!IsValidLocalPath(validated_path))
return 0;
TrimTrailingSlash(&validated_path);
FileRef* file_ref = new FileRef(instance->module(),
fs_type,
validated_path,
origin);
return file_ref->GetReference();
}
PP_Resource CreatePersistentFileRef(PP_Instance instance_id, const char* path) {
return CreateFileRef(instance_id, PP_FILESYSTEMTYPE_LOCALPERSISTENT, path);
}
PP_Resource CreateTemporaryFileRef(PP_Instance instance_id, const char* path) {
return CreateFileRef(instance_id, PP_FILESYSTEMTYPE_LOCALTEMPORARY, path);
}
bool IsFileRef(PP_Resource resource) {
return !!Resource::GetAs<FileRef>(resource);
}
PP_FileSystemType_Dev GetFileSystemType(PP_Resource file_ref_id) {
scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
if (!file_ref)
return PP_FILESYSTEMTYPE_EXTERNAL;
return file_ref->file_system_type();
}
PP_Var GetName(PP_Resource file_ref_id) {
scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
if (!file_ref)
return PP_MakeVoid();
return StringVar::StringToPPVar(file_ref->module(), file_ref->GetName());
}
PP_Var GetPath(PP_Resource file_ref_id) {
scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
if (!file_ref)
return PP_MakeVoid();
if (file_ref->file_system_type() == PP_FILESYSTEMTYPE_EXTERNAL)
return PP_MakeVoid();
return StringVar::StringToPPVar(file_ref->module(), file_ref->path());
}
PP_Resource GetParent(PP_Resource file_ref_id) {
scoped_refptr<FileRef> file_ref(Resource::GetAs<FileRef>(file_ref_id));
if (!file_ref)
return 0;
if (file_ref->file_system_type() == PP_FILESYSTEMTYPE_EXTERNAL)
return 0;
scoped_refptr<FileRef> parent_ref(file_ref->GetParent());
if (!parent_ref)
return 0;
return parent_ref->GetReference();
}
const PPB_FileRef_Dev ppb_fileref = {
&CreatePersistentFileRef,
&CreateTemporaryFileRef,
&IsFileRef,
&GetFileSystemType,
&GetName,
&GetPath,
&GetParent
};
} // namespace
FileRef::FileRef(PluginModule* module,
PP_FileSystemType_Dev file_system_type,
const std::string& validated_path,
const std::string& origin)
: Resource(module),
fs_type_(file_system_type),
path_(validated_path),
origin_(origin) {
// TODO(darin): Need to initialize system_path_.
}
FileRef::FileRef(PluginModule* module,
const FilePath& external_file_path)
: Resource(module),
system_path_(external_file_path),
fs_type_(PP_FILESYSTEMTYPE_EXTERNAL) {
}
FileRef::~FileRef() {
}
// static
const PPB_FileRef_Dev* FileRef::GetInterface() {
return &ppb_fileref;
}
std::string FileRef::GetName() const {
if (path_.size() == 1 && path_[0] == '/')
return path_;
// There should always be a leading slash at least!
size_t pos = path_.rfind('/');
DCHECK(pos != std::string::npos);
return path_.substr(pos + 1);
}
scoped_refptr<FileRef> FileRef::GetParent() {
if (path_.size() == 1 && path_[0] == '/')
return this;
// There should always be a leading slash at least!
size_t pos = path_.rfind('/');
DCHECK(pos != std::string::npos);
// If the path is "/foo", then we want to include the slash.
if (pos == 0)
pos++;
std::string parent_path = path_.substr(0, pos);
FileRef* parent_ref = new FileRef(module(), fs_type_, parent_path, origin_);
return parent_ref;
}
// static
FileRef* FileRef::GetInaccessibleFileRef(PluginModule* module) {
FilePath inaccessible_path;
if (!PathService::Get(base::FILE_MODULE, &inaccessible_path))
return NULL;
return new FileRef(module, inaccessible_path);
}
// static
FileRef* FileRef::GetNonexistentFileRef(PluginModule* module) {
FilePath dir_module_path;
if (!PathService::Get(base::DIR_MODULE, &dir_module_path))
return NULL;
return new FileRef(module, dir_module_path.Append(
FILE_PATH_LITERAL("nonexistent_file")));
}
} // namespace pepper
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