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// Copyright (c) 2011 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/plugins/ppapi/ppb_file_ref_impl.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "ppapi/c/pp_errors.h"
#include "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/file_callbacks.h"
#include "webkit/plugins/ppapi/plugin_delegate.h"
#include "webkit/plugins/ppapi/plugin_module.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
#include "webkit/plugins/ppapi/ppb_directory_reader_impl.h"
#include "webkit/plugins/ppapi/ppb_file_system_impl.h"
#include "webkit/plugins/ppapi/var.h"
namespace webkit {
namespace ppapi {
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 Create(PP_Resource file_system_id, const char* path) {
scoped_refptr<PPB_FileSystem_Impl> file_system(
Resource::GetAs<PPB_FileSystem_Impl>(file_system_id));
if (!file_system)
return 0;
if (!file_system->instance())
return 0;
std::string validated_path(path);
if (!IsValidLocalPath(validated_path))
return 0;
TrimTrailingSlash(&validated_path);
PPB_FileRef_Impl* file_ref =
new PPB_FileRef_Impl(file_system->instance(),
file_system, validated_path);
return file_ref->GetReference();
}
PP_Bool IsFileRef(PP_Resource resource) {
return BoolToPPBool(!!Resource::GetAs<PPB_FileRef_Impl>(resource));
}
PP_FileSystemType_Dev GetFileSystemType(PP_Resource file_ref_id) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_FILESYSTEMTYPE_INVALID;
return file_ref->GetFileSystemType();
}
PP_Var GetName(PP_Resource file_ref_id) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_MakeUndefined();
return StringVar::StringToPPVar(file_ref->instance()->module(),
file_ref->GetName());
}
PP_Var GetPath(PP_Resource file_ref_id) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_MakeUndefined();
if (file_ref->GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL)
return PP_MakeUndefined();
return StringVar::StringToPPVar(file_ref->instance()->module(),
file_ref->GetPath());
}
PP_Resource GetParent(PP_Resource file_ref_id) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return 0;
if (file_ref->GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL)
return 0;
scoped_refptr<PPB_FileRef_Impl> parent_ref(file_ref->GetParent());
if (!parent_ref)
return 0;
return parent_ref->GetReference();
}
int32_t MakeDirectory(PP_Resource directory_ref_id,
PP_Bool make_ancestors,
PP_CompletionCallback callback) {
scoped_refptr<PPB_FileRef_Impl> directory_ref(
Resource::GetAs<PPB_FileRef_Impl>(directory_ref_id));
if (!directory_ref)
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_FileSystem_Impl> file_system =
directory_ref->GetFileSystem();
if (!file_system || !file_system->opened() ||
(file_system->type() == PP_FILESYSTEMTYPE_EXTERNAL))
return PP_ERROR_NOACCESS;
PluginInstance* instance = file_system->instance();
if (!instance->delegate()->MakeDirectory(
directory_ref->GetSystemPath(), PPBoolToBool(make_ancestors),
new FileCallbacks(instance->module()->AsWeakPtr(), directory_ref_id,
callback, NULL, NULL, NULL)))
return PP_ERROR_FAILED;
return PP_OK_COMPLETIONPENDING;
}
int32_t Touch(PP_Resource file_ref_id,
PP_Time last_access_time,
PP_Time last_modified_time,
PP_CompletionCallback callback) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_FileSystem_Impl> file_system = file_ref->GetFileSystem();
if (!file_system || !file_system->opened() ||
(file_system->type() == PP_FILESYSTEMTYPE_EXTERNAL))
return PP_ERROR_NOACCESS;
PluginInstance* instance = file_system->instance();
if (!instance->delegate()->Touch(
file_ref->GetSystemPath(), base::Time::FromDoubleT(last_access_time),
base::Time::FromDoubleT(last_modified_time),
new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
callback, NULL, NULL, NULL)))
return PP_ERROR_FAILED;
return PP_OK_COMPLETIONPENDING;
}
int32_t Delete(PP_Resource file_ref_id,
PP_CompletionCallback callback) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_FileSystem_Impl> file_system = file_ref->GetFileSystem();
if (!file_system || !file_system->opened() ||
(file_system->type() == PP_FILESYSTEMTYPE_EXTERNAL))
return PP_ERROR_NOACCESS;
PluginInstance* instance = file_system->instance();
if (!instance->delegate()->Delete(
file_ref->GetSystemPath(),
new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
callback, NULL, NULL, NULL)))
return PP_ERROR_FAILED;
return PP_OK_COMPLETIONPENDING;
}
int32_t Rename(PP_Resource file_ref_id,
PP_Resource new_file_ref_id,
PP_CompletionCallback callback) {
scoped_refptr<PPB_FileRef_Impl> file_ref(
Resource::GetAs<PPB_FileRef_Impl>(file_ref_id));
if (!file_ref)
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_FileRef_Impl> new_file_ref(
Resource::GetAs<PPB_FileRef_Impl>(new_file_ref_id));
if (!new_file_ref)
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_FileSystem_Impl> file_system = file_ref->GetFileSystem();
if (!file_system || !file_system->opened() ||
(file_system != new_file_ref->GetFileSystem()) ||
(file_system->type() == PP_FILESYSTEMTYPE_EXTERNAL))
return PP_ERROR_NOACCESS;
// TODO(viettrungluu): Also cancel when the new file ref is destroyed?
// http://crbug.com/67624
PluginInstance* instance = file_system->instance();
if (!instance->delegate()->Rename(
file_ref->GetSystemPath(), new_file_ref->GetSystemPath(),
new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
callback, NULL, NULL, NULL)))
return PP_ERROR_FAILED;
return PP_OK_COMPLETIONPENDING;
}
const PPB_FileRef_Dev ppb_fileref = {
&Create,
&IsFileRef,
&GetFileSystemType,
&GetName,
&GetPath,
&GetParent,
&MakeDirectory,
&Touch,
&Delete,
&Rename
};
} // namespace
PPB_FileRef_Impl::PPB_FileRef_Impl()
: Resource(NULL),
file_system_(NULL) {
}
PPB_FileRef_Impl::PPB_FileRef_Impl(
PluginInstance* instance,
scoped_refptr<PPB_FileSystem_Impl> file_system,
const std::string& validated_path)
: Resource(instance),
file_system_(file_system),
virtual_path_(validated_path) {
}
PPB_FileRef_Impl::PPB_FileRef_Impl(PluginInstance* instance,
const FilePath& external_file_path)
: Resource(instance),
file_system_(NULL),
system_path_(external_file_path) {
}
PPB_FileRef_Impl::~PPB_FileRef_Impl() {
}
// static
const PPB_FileRef_Dev* PPB_FileRef_Impl::GetInterface() {
return &ppb_fileref;
}
PPB_FileRef_Impl* PPB_FileRef_Impl::AsPPB_FileRef_Impl() {
return this;
}
std::string PPB_FileRef_Impl::GetName() const {
if (GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL) {
FilePath::StringType path = system_path_.value();
size_t pos = path.rfind(FilePath::kSeparators[0]);
DCHECK(pos != FilePath::StringType::npos);
#if defined(OS_WIN)
return WideToUTF8(path.substr(pos + 1));
#elif defined(OS_POSIX)
return path.substr(pos + 1);
#else
#error "Unsupported platform."
#endif
}
if (virtual_path_.size() == 1 && virtual_path_[0] == '/')
return virtual_path_;
// There should always be a leading slash at least!
size_t pos = virtual_path_.rfind('/');
DCHECK(pos != std::string::npos);
return virtual_path_.substr(pos + 1);
}
scoped_refptr<PPB_FileRef_Impl> PPB_FileRef_Impl::GetParent() {
if (GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL)
return new PPB_FileRef_Impl();
// There should always be a leading slash at least!
size_t pos = virtual_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 = virtual_path_.substr(0, pos);
PPB_FileRef_Impl* parent_ref = new PPB_FileRef_Impl(instance(), file_system_,
parent_path);
return parent_ref;
}
scoped_refptr<PPB_FileSystem_Impl> PPB_FileRef_Impl::GetFileSystem() const {
return file_system_;
}
PP_FileSystemType_Dev PPB_FileRef_Impl::GetFileSystemType() const {
// When the file ref exists but there's no explicit filesystem object
// associated with it, that means it's an "external" filesystem.
if (!file_system_)
return PP_FILESYSTEMTYPE_EXTERNAL;
return file_system_->type();
}
std::string PPB_FileRef_Impl::GetPath() const {
return virtual_path_;
}
FilePath PPB_FileRef_Impl::GetSystemPath() const {
if (GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL)
return system_path_;
// Since |virtual_path_| starts with a '/', it is considered an absolute path
// on POSIX systems. We need to remove the '/' before calling Append() or we
// will run into a DCHECK.
FilePath virtual_file_path(
#if defined(OS_WIN)
UTF8ToWide(virtual_path_.substr(1))
#elif defined(OS_POSIX)
virtual_path_.substr(1)
#else
#error "Unsupported platform."
#endif
);
return file_system_->root_path().Append(virtual_file_path);
}
} // namespace ppapi
} // namespace webkit
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