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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(DART_HOST_OS_WINDOWS)
#include "bin/file_system_watcher.h"
#include <winioctl.h> // NOLINT
#include "bin/builtin.h"
#include "bin/eventhandler.h"
#include "bin/utils.h"
#include "bin/utils_win.h"
#include "platform/syslog.h"
namespace dart {
namespace bin {
bool FileSystemWatcher::IsSupported() {
return true;
}
intptr_t FileSystemWatcher::Init() {
return 0;
}
void FileSystemWatcher::Close(intptr_t id) {
USE(id);
}
intptr_t FileSystemWatcher::WatchPath(intptr_t id,
Namespace* namespc,
const char* path,
int events,
bool recursive) {
USE(id);
const auto name = Utf8ToWideChar(path);
HANDLE dir =
CreateFileW(name.get(), FILE_LIST_DIRECTORY,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
nullptr, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, nullptr);
if (dir == INVALID_HANDLE_VALUE) {
return -1;
}
int list_events = 0;
if ((events & (kCreate | kMove | kDelete)) != 0) {
list_events |= FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME;
}
if ((events & kModifyContent) != 0) {
list_events |= FILE_NOTIFY_CHANGE_LAST_WRITE;
}
DirectoryWatchHandle* handle =
new DirectoryWatchHandle(dir, list_events, recursive);
handle->Start();
return reinterpret_cast<intptr_t>(handle);
}
void FileSystemWatcher::UnwatchPath(intptr_t id, intptr_t path_id) {
USE(id);
DirectoryWatchHandle* handle =
reinterpret_cast<DirectoryWatchHandle*>(path_id);
handle->Stop();
}
intptr_t FileSystemWatcher::GetSocketId(intptr_t id, intptr_t path_id) {
USE(id);
return path_id;
}
Dart_Handle FileSystemWatcher::ReadEvents(intptr_t id, intptr_t path_id) {
USE(id);
const intptr_t kEventSize = sizeof(FILE_NOTIFY_INFORMATION);
DirectoryWatchHandle* dir = reinterpret_cast<DirectoryWatchHandle*>(path_id);
intptr_t available = dir->Available();
if (available <= 0) {
return Dart_NewList(0);
}
intptr_t max_count = available / kEventSize + 1;
Dart_Handle events = Dart_NewList(max_count);
uint8_t* buffer = Dart_ScopeAllocate(available);
intptr_t bytes = dir->Read(buffer, available);
intptr_t offset = 0;
intptr_t i = 0;
while (offset < bytes) {
FILE_NOTIFY_INFORMATION* e =
reinterpret_cast<FILE_NOTIFY_INFORMATION*>(buffer + offset);
Dart_Handle event = Dart_NewList(5);
int mask = 0;
if (e->Action == FILE_ACTION_ADDED) {
mask |= kCreate;
}
if (e->Action == FILE_ACTION_REMOVED) {
mask |= kDelete;
}
if (e->Action == FILE_ACTION_MODIFIED) {
mask |= kModifyContent;
}
if (e->Action == FILE_ACTION_RENAMED_OLD_NAME) {
mask |= kMove;
}
if (e->Action == FILE_ACTION_RENAMED_NEW_NAME) {
mask |= kMove;
}
Dart_ListSetAt(event, 0, Dart_NewInteger(mask));
// Move events come in pairs. Just 'enable' by default.
Dart_ListSetAt(event, 1, Dart_NewInteger(1));
Dart_ListSetAt(
event, 2,
Dart_NewStringFromUTF16(reinterpret_cast<uint16_t*>(e->FileName),
e->FileNameLength / 2));
Dart_ListSetAt(event, 3, Dart_NewBoolean(true));
Dart_ListSetAt(event, 4, Dart_NewInteger(path_id));
Dart_ListSetAt(events, i, event);
i++;
if (e->NextEntryOffset == 0) {
break;
}
offset += e->NextEntryOffset;
}
return events;
}
} // namespace bin
} // namespace dart
#endif // defined(DART_HOST_OS_WINDOWS)