Quelle  WinFileDialogChild.cpp

/* -*- 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/widget/filedialog/WinFileDialogChild.h"

#include <combaseapi.h>
#include <objbase.h>
#include <shobjidl.h>

#include "mozilla/Assertions.h"
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/widget/filedialog/WinFileDialogCommands.h"
#include "nsPrintfCString.h"

namespace mozilla::widget::filedialog {

/* extern */ mozilla::LazyLogModule sLogFileDialog("FileDialog");

WinFileDialogChild::WinFileDialogChild() {
  MOZ_LOG(sLogFileDialog, LogLevel::Info, ("%s %p", __PRETTY_FUNCTION__, this));
};

WinFileDialogChild::~WinFileDialogChild() {
  MOZ_LOG(sLogFileDialog, LogLevel::Info, ("%s %p", __PRETTY_FUNCTION__, this));
};

#define MOZ_ABORT_IF_ALREADY_USED()                                            \
  do {                                                                         \
    MOZ_RELEASE_ASSERT(                                                        \
        !mUsed, "called Show* twice on a single WinFileDialog instance");      \
    MOZ_LOG(                                                                   \
        sLogFileDialog, LogLevel::Info,                                        \
        ("%s %p: first call to a Show* function", __PRETTY_FUNCTION__, this)); \
    mUsed = true;                                                              \
  } while (0)

template <size_t N>
WinFileDialogChild::IPCResult WinFileDialogChild::MakeIpcFailure(
    HRESULT hr, const char (&what)[N]) {
  CrashReporter::RecordAnnotationU32(
      CrashReporter::Annotation::WindowsFileDialogErrorCode, hr);

  return IPC_FAIL(this, what);
}

WinFileDialogChild::IPCResult WinFileDialogChild::RecvShowFileDialog(
    uintptr_t parentHwnd, FileDialogType type, nsTArray<Command> commands,
    FileResolver&& resolver) {
  MOZ_ABORT_IF_ALREADY_USED();

  auto promise = SpawnFilePicker(HWND(parentHwnd), type, std::move(commands));
  using RRV = std::decay_t<decltype(*promise)>::ResolveOrRejectValue;

  promise->Then(GetMainThreadSerialEventTarget(), __PRETTY_FUNCTION__,
                [resolver = std::move(resolver)](RRV&& val) -> void {
                  if (val.IsResolve()) {
                    resolver(val.ResolveValue());
                  } else {
                    auto err = val.RejectValue();
                    resolver(RemoteError(err.where.Serialize(), err.why));
                  }
                });

  return IPC_OK();
}

WinFileDialogChild::IPCResult WinFileDialogChild::RecvShowFolderDialog(
    uintptr_t parentHwnd, nsTArray<Command> commands,
    FolderResolver&& resolver) {
  MOZ_ABORT_IF_ALREADY_USED();

  auto promise = SpawnFolderPicker(HWND(parentHwnd), std::move(commands));
  using RRV = std::decay_t<decltype(*promise)>::ResolveOrRejectValue;

  promise->Then(GetMainThreadSerialEventTarget(), __PRETTY_FUNCTION__,
                [resolver = std::move(resolver)](RRV&& val) -> void {
                  if (val.IsResolve()) {
                    resolver(val.ResolveValue());
                  } else {
                    auto err = val.RejectValue();
                    resolver(RemoteError(err.where.Serialize(), err.why));
                  }
                });

  return IPC_OK();
}

void WinFileDialogChild::ProcessingError(Result aCode, const char* aReason) {
  detail::LogProcessingError(sLogFileDialog, this, aCode, aReason);
}

}  // namespace mozilla::widget::filedialog