103 lines
3.4 KiB
C++
103 lines
3.4 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_WinFileDialogParent_h__
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#define widget_windows_filedialog_WinFileDialogParent_h__
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#include "mozilla/Assertions.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/MozPromise.h"
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#include "mozilla/ProcInfo.h"
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#include "mozilla/Result.h"
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#include "mozilla/SpinEventLoopUntil.h"
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#include "mozilla/dom/ChromeUtilsBinding.h"
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#include "mozilla/ipc/UtilityProcessParent.h"
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#include "mozilla/widget/filedialog/PWinFileDialogParent.h"
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#include "nsISupports.h"
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#include "nsStringFwd.h"
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namespace mozilla::widget::filedialog {
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class WinFileDialogParent final : private PWinFileDialogParent {
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public:
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using UtilityActorName = ::mozilla::UtilityActorName;
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WinFileDialogParent, override);
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using ShowFileDialogPromise = Promise<Maybe<Results>>;
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using ShowFolderDialogPromise = Promise<Maybe<nsString>>;
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public:
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WinFileDialogParent();
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nsresult BindToUtilityProcess(
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mozilla::ipc::UtilityProcessParent* aUtilityParent);
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UtilityActorName GetActorName() {
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return UtilityActorName::WindowsFileDialog;
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}
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bool CanSend() const { return PWinFileDialogParent::CanSend(); }
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void Close() { return PWinFileDialogParent::Close(); }
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[[nodiscard]] RefPtr<ShowFileDialogPromise> ShowFileDialogImpl(
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HWND parent, const FileDialogType& type,
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mozilla::Span<Command const> commands);
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[[nodiscard]] RefPtr<ShowFolderDialogPromise> ShowFolderDialogImpl(
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HWND parent, mozilla::Span<Command const> commands);
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private:
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~WinFileDialogParent();
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void ProcessingError(Result aCode, const char* aReason) override;
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};
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// Proxy for the WinFileDialog process and actor.
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//
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// The IPC subsystem holds a strong reference to all IPC actors, so releasing
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// the last RefPtr for such an actor does not actually cause the actor to be
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// destroyed. Similarly, the UtilityProcessManager owns the host process for an
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// actor, and merely destroying all actors within that host process will not
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// cause it to be reaped.
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//
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// This object, then, acts as a proxy for those objects' lifetimes: when the
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// last reference to `Contents` is released, the necessary explicit cleanup of
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// the actor (and, if possible, the host process) will be performed.
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class ProcessProxy {
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public:
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using WFDP = WinFileDialogParent;
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explicit ProcessProxy(RefPtr<WFDP>&& obj);
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~ProcessProxy() = default;
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explicit operator bool() const { return data->ptr && data->ptr->CanSend(); }
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bool operator!() const { return !bool(*this); }
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WFDP& operator*() const { return *data->ptr; }
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WFDP* operator->() const { return data->ptr; }
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WFDP* get() const { return data->ptr; }
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ProcessProxy(ProcessProxy const& that) = default;
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ProcessProxy(ProcessProxy&&) = default;
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private:
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struct Contents {
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NS_INLINE_DECL_REFCOUNTING(Contents);
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public:
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explicit Contents(RefPtr<WFDP>&& obj);
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RefPtr<WFDP> const ptr;
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private:
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~Contents();
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void StopProcess();
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};
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// guaranteed nonnull
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RefPtr<Contents> data;
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};
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} // namespace mozilla::widget::filedialog
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#endif // widget_windows_filedialog_WinFileDialogParent_h__
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