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// 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.
#include "webkit/fileapi/isolated_file_util.h"
#include <string>
#include <vector>
#include "webkit/blob/shareable_file_reference.h"
#include "webkit/fileapi/file_system_context.h"
#include "webkit/fileapi/file_system_operation_context.h"
#include "webkit/fileapi/file_system_url.h"
#include "webkit/fileapi/isolated_context.h"
#include "webkit/fileapi/native_file_util.h"
using base::PlatformFileError;
using base::PlatformFileInfo;
namespace fileapi {
typedef IsolatedContext::MountPointInfo FileInfo;
namespace {
// Simply enumerate each path from a given fileinfo set.
// Used to enumerate top-level paths of an isolated filesystem.
class SetFileEnumerator : public FileSystemFileUtil::AbstractFileEnumerator {
public:
explicit SetFileEnumerator(const std::vector<FileInfo>& files)
: files_(files) {
file_iter_ = files_.begin();
}
virtual ~SetFileEnumerator() {}
// AbstractFileEnumerator overrides.
virtual base::FilePath Next() OVERRIDE {
if (file_iter_ == files_.end())
return base::FilePath();
base::FilePath platform_file = (file_iter_++)->path;
NativeFileUtil::GetFileInfo(platform_file, &file_info_);
return platform_file;
}
virtual int64 Size() OVERRIDE { return file_info_.size; }
virtual bool IsDirectory() OVERRIDE { return file_info_.is_directory; }
virtual base::Time LastModifiedTime() OVERRIDE {
return file_info_.last_modified;
}
private:
std::vector<FileInfo> files_;
std::vector<FileInfo>::const_iterator file_iter_;
base::PlatformFileInfo file_info_;
};
// Recursively enumerate each path from a given paths set.
class RecursiveSetFileEnumerator
: public FileSystemFileUtil::AbstractFileEnumerator {
public:
explicit RecursiveSetFileEnumerator(const std::vector<FileInfo>& files)
: files_(files) {
file_iter_ = files_.begin();
current_enumerator_.reset(new SetFileEnumerator(files));
}
virtual ~RecursiveSetFileEnumerator() {}
// AbstractFileEnumerator overrides.
virtual base::FilePath Next() OVERRIDE;
virtual int64 Size() OVERRIDE {
DCHECK(current_enumerator_.get());
return current_enumerator_->Size();
}
virtual bool IsDirectory() OVERRIDE {
DCHECK(current_enumerator_.get());
return current_enumerator_->IsDirectory();
}
virtual base::Time LastModifiedTime() OVERRIDE {
DCHECK(current_enumerator_.get());
return current_enumerator_->LastModifiedTime();
}
private:
std::vector<FileInfo> files_;
std::vector<FileInfo>::iterator file_iter_;
scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> current_enumerator_;
};
base::FilePath RecursiveSetFileEnumerator::Next() {
if (current_enumerator_.get()) {
base::FilePath path = current_enumerator_->Next();
if (!path.empty())
return path;
}
// We reached the end.
if (file_iter_ == files_.end())
return base::FilePath();
// Enumerates subdirectories of the next path.
FileInfo& next_file = *file_iter_++;
current_enumerator_ = NativeFileUtil::CreateFileEnumerator(
next_file.path, true /* recursive */);
DCHECK(current_enumerator_.get());
return current_enumerator_->Next();
}
} // namespace
//-------------------------------------------------------------------------
IsolatedFileUtil::IsolatedFileUtil() {}
PlatformFileError IsolatedFileUtil::GetLocalFilePath(
FileSystemOperationContext* context,
const FileSystemURL& url,
base::FilePath* local_file_path) {
DCHECK(local_file_path);
DCHECK(url.is_valid());
if (url.path().empty()) {
// Root direcory case, which should not be accessed.
return base::PLATFORM_FILE_ERROR_ACCESS_DENIED;
}
*local_file_path = url.path();
return base::PLATFORM_FILE_OK;
}
//-------------------------------------------------------------------------
DraggedFileUtil::DraggedFileUtil() {}
PlatformFileError DraggedFileUtil::GetFileInfo(
FileSystemOperationContext* context,
const FileSystemURL& url,
PlatformFileInfo* file_info,
base::FilePath* platform_path) {
DCHECK(file_info);
std::string filesystem_id;
DCHECK(url.is_valid());
if (url.path().empty()) {
// The root directory case.
// For now we leave three time fields (modified/accessed/creation time)
// NULL as it is not really clear what to be set for this virtual directory.
// TODO(kinuko): Maybe we want to set the time when this filesystem is
// created (i.e. when the files/directories are dropped).
file_info->is_directory = true;
file_info->is_symbolic_link = false;
file_info->size = 0;
return base::PLATFORM_FILE_OK;
}
base::PlatformFileError error =
NativeFileUtil::GetFileInfo(url.path(), file_info);
if (file_util::IsLink(url.path()) && !base::FilePath().IsParent(url.path())) {
// Don't follow symlinks unless it's the one that are selected by the user.
return base::PLATFORM_FILE_ERROR_NOT_FOUND;
}
if (error == base::PLATFORM_FILE_OK)
*platform_path = url.path();
return error;
}
scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>
DraggedFileUtil::CreateFileEnumerator(
FileSystemOperationContext* context,
const FileSystemURL& root,
bool recursive) {
DCHECK(root.is_valid());
if (!root.path().empty())
return NativeFileUtil::CreateFileEnumerator(root.path(), recursive);
// Root path case.
std::vector<FileInfo> toplevels;
IsolatedContext::GetInstance()->GetDraggedFileInfo(
root.filesystem_id(), &toplevels);
if (!recursive) {
return make_scoped_ptr(new SetFileEnumerator(toplevels))
.PassAs<FileSystemFileUtil::AbstractFileEnumerator>();
}
return make_scoped_ptr(new RecursiveSetFileEnumerator(toplevels))
.PassAs<FileSystemFileUtil::AbstractFileEnumerator>();
}
} // namespace fileapi
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