forked from mirrors/gecko-dev
b442fec76f
Introduce functions which create and invoke the Windows file-picker in a separate thread. This thread is created with a new single-threaded COM apartment to avoid implicitly creating a nested modal loop on the main STA thread. Technically, no functional changes: these functions aren't actually invoked yet. (That will occur in an upcoming commit.) Differential Revision: https://phabricator.services.mozilla.com/D193735
71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef widget_windows_filedialog_WinFileDialogCommands_h__
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#define widget_windows_filedialog_WinFileDialogCommands_h__
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#include "ipc/EnumSerializer.h"
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#include "mozilla/MozPromise.h"
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#include "mozilla/ipc/MessageLink.h"
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#include "mozilla/widget/filedialog/WinFileDialogCommandsDefn.h"
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// Windows interface types, defined in <shobjidl.h>
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struct IFileDialog;
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struct IFileOpenDialog;
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namespace mozilla::widget::filedialog {
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enum class FileDialogType : uint8_t { Open, Save };
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// Create a file-dialog of the relevant type. Requires MSCOM to be initialized.
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mozilla::Result<RefPtr<IFileDialog>, HRESULT> MakeFileDialog(FileDialogType);
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// Apply the selected commands to the IFileDialog, in preparation for showing
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// it. (The actual showing step is left to the caller.)
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[[nodiscard]] HRESULT ApplyCommands(::IFileDialog*,
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nsTArray<Command> const& commands);
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// Extract one or more results from the file-picker dialog.
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//
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// Requires that Show() has been called and has returned S_OK.
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mozilla::Result<Results, HRESULT> GetFileResults(::IFileDialog*);
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// Extract the chosen folder from the folder-picker dialog.
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//
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// Requires that Show() has been called and has returned S_OK.
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mozilla::Result<nsString, HRESULT> GetFolderResults(::IFileDialog*);
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namespace detail {
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// Log the error. If it's a notable error, kill the child process.
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void LogProcessingError(LogModule* aModule, ipc::IProtocol* aCaller,
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ipc::HasResultCodes::Result aCode, const char* aReason);
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} // namespace detail
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template <typename R>
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using Promise = MozPromise<R, HRESULT, true>;
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// Show a file-picker on another thread in the current process.
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RefPtr<Promise<Maybe<Results>>> SpawnFilePicker(HWND parent,
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FileDialogType type,
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nsTArray<Command> commands);
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// Show a folder-picker on another thread in the current process.
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RefPtr<Promise<Maybe<nsString>>> SpawnFolderPicker(HWND parent,
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nsTArray<Command> commands);
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} // namespace mozilla::widget::filedialog
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namespace IPC {
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template <>
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struct ParamTraits<mozilla::widget::filedialog::FileDialogType>
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: public ContiguousEnumSerializerInclusive<
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mozilla::widget::filedialog::FileDialogType,
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mozilla::widget::filedialog::FileDialogType::Open,
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mozilla::widget::filedialog::FileDialogType::Save> {};
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} // namespace IPC
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#endif // widget_windows_filedialog_WinFileDialogCommands_h__
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