summaryrefslogtreecommitdiffstats
path: root/dom/ipc/FilePickerParent.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/ipc/FilePickerParent.cpp')
-rw-r--r--dom/ipc/FilePickerParent.cpp293
1 files changed, 293 insertions, 0 deletions
diff --git a/dom/ipc/FilePickerParent.cpp b/dom/ipc/FilePickerParent.cpp
new file mode 100644
index 0000000000..08f2a8fb6c
--- /dev/null
+++ b/dom/ipc/FilePickerParent.cpp
@@ -0,0 +1,293 @@
+/* -*- 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 "FilePickerParent.h"
+#include "nsComponentManagerUtils.h"
+#include "nsNetCID.h"
+#include "mozilla/dom/Document.h"
+#include "nsIFile.h"
+#include "nsISimpleEnumerator.h"
+#include "mozilla/Unused.h"
+#include "mozilla/dom/FileBlobImpl.h"
+#include "mozilla/dom/FileSystemSecurity.h"
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/IPCBlobUtils.h"
+
+using mozilla::Unused;
+using namespace mozilla::dom;
+
+NS_IMPL_ISUPPORTS(FilePickerParent::FilePickerShownCallback,
+ nsIFilePickerShownCallback);
+
+NS_IMETHODIMP
+FilePickerParent::FilePickerShownCallback::Done(
+ nsIFilePicker::ResultCode aResult) {
+ if (mFilePickerParent) {
+ mFilePickerParent->Done(aResult);
+ }
+ return NS_OK;
+}
+
+void FilePickerParent::FilePickerShownCallback::Destroy() {
+ mFilePickerParent = nullptr;
+}
+
+FilePickerParent::~FilePickerParent() = default;
+
+// We run code in three places:
+// 1. The main thread calls Dispatch() to start the runnable.
+// 2. The stream transport thread stat()s the file in Run() and then dispatches
+// the same runnable on the main thread.
+// 3. The main thread sends the results over IPC.
+FilePickerParent::IORunnable::IORunnable(FilePickerParent* aFPParent,
+ nsTArray<nsCOMPtr<nsIFile>>&& aFiles,
+ bool aIsDirectory)
+ : mozilla::Runnable("dom::FilePickerParent::IORunnable"),
+ mFilePickerParent(aFPParent),
+ mFiles(std::move(aFiles)),
+ mIsDirectory(aIsDirectory) {
+ MOZ_ASSERT_IF(aIsDirectory, mFiles.Length() == 1);
+}
+
+bool FilePickerParent::IORunnable::Dispatch() {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ mEventTarget = do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
+ if (!mEventTarget) {
+ return false;
+ }
+
+ nsresult rv = mEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
+ return NS_SUCCEEDED(rv);
+}
+
+NS_IMETHODIMP
+FilePickerParent::IORunnable::Run() {
+ // If we're on the main thread, then that means we're done. Just send the
+ // results.
+ if (NS_IsMainThread()) {
+ if (mFilePickerParent) {
+ mFilePickerParent->SendFilesOrDirectories(mResults);
+ }
+ return NS_OK;
+ }
+
+ // We're not on the main thread, so do the IO.
+
+ for (uint32_t i = 0; i < mFiles.Length(); ++i) {
+ if (mIsDirectory) {
+ nsAutoString path;
+ nsresult rv = mFiles[i]->GetPath(path);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ continue;
+ }
+
+ BlobImplOrString* data = mResults.AppendElement();
+ data->mType = BlobImplOrString::eDirectoryPath;
+ data->mDirectoryPath = path;
+ continue;
+ }
+
+ RefPtr<BlobImpl> blobImpl = new FileBlobImpl(mFiles[i]);
+
+ ErrorResult error;
+ blobImpl->GetSize(error);
+ if (NS_WARN_IF(error.Failed())) {
+ error.SuppressException();
+ continue;
+ }
+
+ blobImpl->GetLastModified(error);
+ if (NS_WARN_IF(error.Failed())) {
+ error.SuppressException();
+ continue;
+ }
+
+ BlobImplOrString* data = mResults.AppendElement();
+ data->mType = BlobImplOrString::eBlobImpl;
+ data->mBlobImpl = blobImpl;
+ }
+
+ // Dispatch ourselves back on the main thread.
+ if (NS_FAILED(NS_DispatchToMainThread(this))) {
+ // It's hard to see how we can recover gracefully in this case. The child
+ // process is waiting for an IPC, but that can only happen on the main
+ // thread.
+ MOZ_CRASH();
+ }
+
+ return NS_OK;
+}
+
+void FilePickerParent::IORunnable::Destroy() { mFilePickerParent = nullptr; }
+
+void FilePickerParent::SendFilesOrDirectories(
+ const nsTArray<BlobImplOrString>& aData) {
+ ContentParent* parent = BrowserParent::GetFrom(Manager())->Manager();
+
+ if (mMode == nsIFilePicker::modeGetFolder) {
+ MOZ_ASSERT(aData.Length() <= 1);
+ if (aData.IsEmpty()) {
+ Unused << Send__delete__(this, void_t(), mResult);
+ return;
+ }
+
+ MOZ_ASSERT(aData[0].mType == BlobImplOrString::eDirectoryPath);
+
+ // Let's inform the security singleton about the given access of this tab on
+ // this directory path.
+ RefPtr<FileSystemSecurity> fss = FileSystemSecurity::GetOrCreate();
+ fss->GrantAccessToContentProcess(parent->ChildID(),
+ aData[0].mDirectoryPath);
+
+ InputDirectory input;
+ input.directoryPath() = aData[0].mDirectoryPath;
+ Unused << Send__delete__(this, input, mResult);
+ return;
+ }
+
+ nsTArray<IPCBlob> ipcBlobs;
+
+ for (unsigned i = 0; i < aData.Length(); i++) {
+ IPCBlob ipcBlob;
+
+ MOZ_ASSERT(aData[i].mType == BlobImplOrString::eBlobImpl);
+ nsresult rv = IPCBlobUtils::Serialize(aData[i].mBlobImpl, ipcBlob);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ break;
+ }
+
+ ipcBlobs.AppendElement(ipcBlob);
+ }
+
+ InputBlobs inblobs;
+ inblobs.blobs() = std::move(ipcBlobs);
+
+ Unused << Send__delete__(this, inblobs, mResult);
+}
+
+void FilePickerParent::Done(nsIFilePicker::ResultCode aResult) {
+ mResult = aResult;
+
+ if (mResult != nsIFilePicker::returnOK) {
+ Unused << Send__delete__(this, void_t(), mResult);
+ return;
+ }
+
+ nsTArray<nsCOMPtr<nsIFile>> files;
+ if (mMode == nsIFilePicker::modeOpenMultiple) {
+ nsCOMPtr<nsISimpleEnumerator> iter;
+ NS_ENSURE_SUCCESS_VOID(mFilePicker->GetFiles(getter_AddRefs(iter)));
+
+ nsCOMPtr<nsISupports> supports;
+ bool loop = true;
+ while (NS_SUCCEEDED(iter->HasMoreElements(&loop)) && loop) {
+ iter->GetNext(getter_AddRefs(supports));
+ if (supports) {
+ nsCOMPtr<nsIFile> file = do_QueryInterface(supports);
+ MOZ_ASSERT(file);
+ files.AppendElement(file);
+ }
+ }
+ } else {
+ nsCOMPtr<nsIFile> file;
+ mFilePicker->GetFile(getter_AddRefs(file));
+ if (file) {
+ files.AppendElement(file);
+ }
+ }
+
+ if (files.IsEmpty()) {
+ Unused << Send__delete__(this, void_t(), mResult);
+ return;
+ }
+
+ MOZ_ASSERT(!mRunnable);
+ mRunnable = new IORunnable(this, std::move(files),
+ mMode == nsIFilePicker::modeGetFolder);
+
+ // Dispatch to background thread to do I/O:
+ if (!mRunnable->Dispatch()) {
+ Unused << Send__delete__(this, void_t(), nsIFilePicker::returnCancel);
+ }
+}
+
+bool FilePickerParent::CreateFilePicker() {
+ mFilePicker = do_CreateInstance("@mozilla.org/filepicker;1");
+ if (!mFilePicker) {
+ return false;
+ }
+
+ Element* element = BrowserParent::GetFrom(Manager())->GetOwnerElement();
+ if (!element) {
+ return false;
+ }
+
+ nsCOMPtr<mozIDOMWindowProxy> window = element->OwnerDoc()->GetWindow();
+ if (!window) {
+ return false;
+ }
+
+ return NS_SUCCEEDED(mFilePicker->Init(window, mTitle, mMode));
+}
+
+mozilla::ipc::IPCResult FilePickerParent::RecvOpen(
+ const int16_t& aSelectedType, const bool& aAddToRecentDocs,
+ const nsString& aDefaultFile, const nsString& aDefaultExtension,
+ nsTArray<nsString>&& aFilters, nsTArray<nsString>&& aFilterNames,
+ nsTArray<nsString>&& aRawFilters, const nsString& aDisplayDirectory,
+ const nsString& aDisplaySpecialDirectory, const nsString& aOkButtonLabel,
+ const nsIFilePicker::CaptureTarget& aCapture) {
+ if (!CreateFilePicker()) {
+ Unused << Send__delete__(this, void_t(), nsIFilePicker::returnCancel);
+ return IPC_OK();
+ }
+
+ mFilePicker->SetAddToRecentDocs(aAddToRecentDocs);
+
+ for (uint32_t i = 0; i < aFilters.Length(); ++i) {
+ mFilePicker->AppendFilter(aFilterNames[i], aFilters[i]);
+ }
+
+ for (uint32_t i = 0; i < aRawFilters.Length(); ++i) {
+ mFilePicker->AppendRawFilter(aRawFilters[i]);
+ }
+
+ mFilePicker->SetDefaultString(aDefaultFile);
+ mFilePicker->SetDefaultExtension(aDefaultExtension);
+ mFilePicker->SetFilterIndex(aSelectedType);
+ mFilePicker->SetOkButtonLabel(aOkButtonLabel);
+ mFilePicker->SetCapture(aCapture);
+
+ if (!aDisplayDirectory.IsEmpty()) {
+ nsCOMPtr<nsIFile> localFile = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
+ if (localFile) {
+ localFile->InitWithPath(aDisplayDirectory);
+ mFilePicker->SetDisplayDirectory(localFile);
+ }
+ } else if (!aDisplaySpecialDirectory.IsEmpty()) {
+ mFilePicker->SetDisplaySpecialDirectory(aDisplaySpecialDirectory);
+ }
+
+ MOZ_ASSERT(!mCallback);
+ mCallback = new FilePickerShownCallback(this);
+
+ mFilePicker->Open(mCallback);
+ return IPC_OK();
+}
+
+void FilePickerParent::ActorDestroy(ActorDestroyReason aWhy) {
+ if (mCallback) {
+ mCallback->Destroy();
+ mCallback = nullptr;
+ }
+ if (mRunnable) {
+ mRunnable->Destroy();
+ mRunnable = nullptr;
+ }
+}