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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/FileSystemUtils.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsIEventTarget.h"
#include "nsThreadUtils.h"
namespace mozilla::dom {
/* static */
bool FileSystemUtils::IsDescendantPath(const nsAString& aPath,
const nsAString& aDescendantPath) {
// Check the sub-directory path to see if it has the parent path as prefix.
if (!aDescendantPath.Equals(aPath) &&
!StringBeginsWith(aDescendantPath, aPath)) {
return false;
}
return true;
}
/* static */
bool FileSystemUtils::IsValidRelativeDOMPath(const nsAString& aPath,
nsTArray<nsString>& aParts) {
// We don't allow empty relative path to access the root.
if (aPath.IsEmpty()) {
return false;
}
// Leading and trailing "/" are not allowed.
if (aPath.First() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR ||
aPath.Last() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR) {
return false;
}
constexpr auto kCurrentDir = u"."_ns;
constexpr auto kParentDir = u".."_ns;
// Split path and check each path component.
for (const nsAString& pathComponent :
nsCharSeparatedTokenizerTemplate<NS_TokenizerIgnoreNothing>{
aPath, FILESYSTEM_DOM_PATH_SEPARATOR_CHAR}
.ToRange()) {
// The path containing empty components, such as "foo//bar", is invalid.
// We don't allow paths, such as "../foo", "foo/./bar" and "foo/../bar",
// to walk up the directory.
if (pathComponent.IsEmpty() || pathComponent.Equals(kCurrentDir) ||
pathComponent.Equals(kParentDir)) {
return false;
}
aParts.AppendElement(pathComponent);
}
return true;
}
/* static */
nsresult FileSystemUtils::DispatchRunnable(
nsIGlobalObject* aGlobal, already_AddRefed<nsIRunnable>&& aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
nsCOMPtr<nsIEventTarget> target;
if (!aGlobal) {
target = GetMainThreadSerialEventTarget();
} else {
target = aGlobal->SerialEventTarget();
}
MOZ_ASSERT(target);
nsresult rv = target->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
} // namespace mozilla::dom
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