feat: DSH 悬浮窗 v0.1.0 — 原生置顶小窗 + 会话镜像 + 抓屏隐身

- shell: WinForms + WebView2 原生壳(无边框/置顶/固定位置/锁定尺寸/全屏/自适应缩放/截图排除)
- shell/ui.html: 自适应界面(工具栏、会话镜像区、底部聊天框、轮/步/tok/s/MTOK/缓存命中/上下文状态条、外观设置)
- lib/host.js: DSH 插件 Host 半(endpoint 写入、SSE 会话与指标快照、float_window Agent 工具)
- tools: WebView2 SDK 拉取、BOM 修复、Host 冒烟测试
- README: 架构、实测结论(WDA_EXCLUDEFROMCAPTURE、玻璃模式、DPI、WebView2 加载)
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2026-09-27 14:02:58 +08:00
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<#
float-window.ps1 -- DSH 悬浮窗原生壳 (Windows only)
一个由我们自己进程拥有的无边框顶层窗口,内嵌 WebView2 (Chromium):
* 始终置顶 / 固定位置 (pin) / 锁定尺寸 (lock) 三个可开关状态
* 拖动移动、右下角拖动改变尺寸、自适应布局、全屏切换
* SetWindowDisplayAffinity(WDA_EXCLUDEFROMCAPTURE) -> 从截屏里彻底消失
* 位置/尺寸/开关状态记忆;透明度(CSS + 窗口级 alpha 双通道)
* 与页面通过 WebView2 的 postMessage 桥通信 (见 shell/ui.html)
用法:
powershell -File shell\float-window.ps1
powershell -File shell\float-window.ps1 -NoExclude -Opacity 1.0 # 调试: 允许被截图
#>
[CmdletBinding()]
param(
[string]$Lib, # WebView2 SDK 目录, 默认 <repo>\shell\lib
[string]$UiFile, # 浮窗 UI 文件, 默认 <repo>\shell\ui.html
[string]$DshHome, # DSH 主目录, 默认 $env:DSH_HOME 或 ~\.dsh
[double]$Opacity = 0.92,
[ValidateSet('opaque', 'translucent', 'acrylic', 'mica', 'blur')]
[string]$Backdrop = 'opaque',
[switch]$NoExclude, # 调试用: 关闭截图排除
[switch]$NoTopMost,
[string]$Action # 命令行下发的动作: pin|sizeLock|topmost|fullscreen|hide|show|close
)
$ErrorActionPreference = 'Stop'
$ProgressPreference = 'SilentlyContinue'
Add-Type -AssemblyName System.Windows.Forms, System.Drawing
$root = Split-Path -Parent (Split-Path -Parent $MyInvocation.MyCommand.Path)
if (-not $Lib) { $Lib = Join-Path $root 'shell\lib' }
if (-not $UiFile) { $UiFile = Join-Path $root 'shell\ui.html' }
if (-not $DshHome) { $DshHome = if ($env:DSH_HOME) { $env:DSH_HOME } else { Join-Path $env:USERPROFILE '.dsh' } }
# 插件写出的 endpoint.json 永远在 DSH 主目录下(只读)
$endpointFile = Join-Path (Join-Path $DshHome 'float-window') 'endpoint.json'
# 自己的状态和 WebView2 用户数据目录需要可写;被沙箱限制时自动降级
function Test-Writable([string]$Dir) {
try {
New-Item -ItemType Directory -Force -Path $Dir | Out-Null
$probe = Join-Path $Dir '.write-probe'
Set-Content -Path $probe -Value 'x' -ErrorAction Stop
Remove-Item $probe -Force
return $true
} catch { return $false }
}
$stateDir = $null
foreach ($cand in @((Join-Path $DshHome 'float-window'), (Join-Path $env:LOCALAPPDATA 'dsh-float-window'), (Join-Path $root '.runtime'))) {
if (Test-Writable $cand) { $stateDir = $cand; break }
}
if (-not $stateDir) { throw 'no writable state directory' }
$stateFile = Join-Path $stateDir 'window.json'
$logFile = Join-Path $stateDir 'float-window.log'
function Log([string]$Msg) {
try { Add-Content -Path $logFile -Value ("{0} {1}" -f (Get-Date -Format 'HH:mm:ss.fff'), $Msg) -Encoding UTF8 } catch {}
Write-Host "[float] $Msg"
}
Log "start lib=$Lib ui=$UiFile stateDir=$stateDir endpoint=$endpointFile exclude=$(-not $NoExclude) topmost=$(-not $NoTopMost)"
# 单实例:必须在建窗口之前判定
# 单实例:已在运行时,把动作写进 command.json 交给它执行,然后自己退出
$mutexName = 'DSHFloatWindow'
$alreadyRunning = $false
try { $null = [System.Threading.Mutex]::OpenExisting($mutexName); $alreadyRunning = $true } catch { $alreadyRunning = $false }
$commandFile = Join-Path $stateDir 'command.json'
$aliveFile = Join-Path $stateDir 'alive.json'
if ($alreadyRunning) {
if ($Action) {
try {
@{ cmd = $Action; at = (Get-Date).ToString('o') } | ConvertTo-Json | Set-Content -Path $commandFile -Encoding UTF8
Log "handed action '$Action' to the running instance"
} catch { Log "command write failed: $($_.Exception.Message)" }
} else { Log 'another instance is running; exiting' }
exit 0
}
$createdNew = $false
$mutex = New-Object System.Threading.Mutex($true, $mutexName, [ref]$createdNew)
if (-not $createdNew) { Log 'another instance is running; exiting'; exit 0 }
Log 'mutex ok'
# ---------------------------------------------------------------- native interop
Add-Type -Namespace DshFloat -Name Native -MemberDefinition @'
[DllImport("user32.dll")] public static extern bool ReleaseCapture();
[DllImport("user32.dll")] public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll")] public static extern bool SetWindowDisplayAffinity(IntPtr hWnd, uint dwAffinity);
[DllImport("user32.dll")] public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
[DllImport("user32.dll")] public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
[DllImport("user32.dll")] public static extern bool SetLayeredWindowAttributes(IntPtr hWnd, uint crKey, byte bAlpha, uint dwFlags);
'@
# ---------------------------------------------------------------- WebView2 加载
# 本机 PowerShell 用 LoadFrom 加载 WebView2 SDK 会报 0x80131515, 改从字节加载
function Import-AssemblyFromBytes([string]$Path) {
if (-not (Test-Path $Path)) { throw "missing assembly: $Path (先跑 tools\setup-webview2.ps1)" }
[void][System.Reflection.Assembly]::Load([System.IO.File]::ReadAllBytes($Path))
}
Import-AssemblyFromBytes (Join-Path $Lib 'Microsoft.Web.WebView2.Core.dll')
Import-AssemblyFromBytes (Join-Path $Lib 'Microsoft.Web.WebView2.WinForms.dll')
# 原生 loader 走 P/Invoke, 靠 PATH 找到
$env:PATH = "$Lib;$env:PATH"
Log 'webview2 assemblies loaded'
# ---------------------------------------------------------------- 窗体类(边缘缩放 + 云母/亚克力背景)
# 无边框窗口默认没有可拖拽的边框:用 WM_NCHITTEST 在四周 8px 边环上返回 HT* 代码,
# 让系统自己完成缩放(比从页面 postMessage 触发可靠得多)。玻璃模式下抑制 WinForms
# 擦背景,把客户区让给 DWM 的系统背景(Mica / Acrylic)绘制。
Add-Type -ReferencedAssemblies System.Windows.Forms, System.Drawing, System.Runtime.InteropServices -TypeDefinition @'
using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace DshFloat
{
public class FloatForm : Form
{
public int BorderSize = 8;
public bool AllowResize = true;
public int BackdropMode = 0; // 0=opaque 1=mica 2=acrylic 3=blur
[StructLayout(LayoutKind.Sequential)] struct MARGINS { public int l, r, t, b; }
[StructLayout(LayoutKind.Sequential)] struct ACCENTPOLICY { public int State, Flags, GradientColor, AnimationId; }
[StructLayout(LayoutKind.Sequential)] struct WINCOMPDATA { public int Attrib; public IntPtr Data; public int Size; }
[DllImport("dwmapi.dll")] static extern int DwmSetWindowAttribute(IntPtr h, int attr, ref int val, int size);
[DllImport("dwmapi.dll")] static extern int DwmExtendFrameIntoClientArea(IntPtr h, ref MARGINS m);
[DllImport("user32.dll")] static extern int SetWindowCompositionAttribute(IntPtr h, ref WINCOMPDATA d);
public string ApplyBackdrop(int mode)
{
BackdropMode = mode;
int type = mode == 1 ? 2 : (mode == 2 ? 3 : 0); // DWMSBT_MAINWINDOW / TRANSIENTWINDOW / AUTO
int hr = DwmSetWindowAttribute(Handle, 38, ref type, 4); // DWMWA_SYSTEMBACKDROP_TYPE
MARGINS m = new MARGINS();
if (mode != 0) { m.l = -1; m.r = -1; m.t = -1; m.b = -1; }
DwmExtendFrameIntoClientArea(Handle, ref m);
SetAccent(mode == 3 ? 4 : 0, mode == 0 ? 0 : unchecked((int)0x99202028));
Invalidate(true);
return "mode=" + mode + " hr=" + hr;
}
void SetAccent(int state, int color)
{
ACCENTPOLICY acc = new ACCENTPOLICY();
acc.State = state; acc.Flags = 2; acc.GradientColor = color; acc.AnimationId = 0;
int size = Marshal.SizeOf(acc);
IntPtr p = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(acc, p, false);
WINCOMPDATA d = new WINCOMPDATA();
d.Attrib = 19; d.Data = p; d.Size = size; // WCA_ACCENT_POLICY
SetWindowCompositionAttribute(Handle, ref d);
Marshal.FreeHGlobal(p);
}
protected override void OnPaintBackground(PaintEventArgs e)
{
if (BackdropMode == 0) base.OnPaintBackground(e);
}
protected override void WndProc(ref Message m)
{
const int WM_NCHITTEST = 0x84;
const int WM_ERASEBKGND = 0x14;
if (m.Msg == WM_ERASEBKGND && BackdropMode != 0) { m.Result = (IntPtr)1; return; }
if (m.Msg == WM_NCHITTEST && AllowResize)
{
long lp = m.LParam.ToInt64();
Point p = PointToClient(new Point((short)(lp & 0xFFFF), (short)((lp >> 16) & 0xFFFF)));
int b = BorderSize;
bool l = p.X <= b, r = p.X >= ClientSize.Width - b;
bool t = p.Y <= b, bo = p.Y >= ClientSize.Height - b;
int hit = 0;
if (t && l) hit = 13; else if (t && r) hit = 14;
else if (bo && l) hit = 16; else if (bo && r) hit = 17;
else if (l) hit = 10; else if (r) hit = 11;
else if (t) hit = 12; else if (bo) hit = 15;
if (hit != 0) { m.Result = (IntPtr)hit; return; }
}
base.WndProc(ref m);
}
}
}
'@
Log 'floatform type ok'
# ---------------------------------------------------------------- 状态与默认值
$WS_EX_LAYERED = 0x80000
$WDA_EXCLUDEFROMCAPTURE = 0x11
$SWP_NOMOVE = 0x2; $SWP_NOSIZE = 0x1
$script:state = [ordered]@{
x = -1; y = -1; w = 420; h = 720
topmost = (-not $NoTopMost)
posLock = $false
sizeLock = $false
opacity = $Opacity
exclude = (-not $NoExclude)
scale = 1.0
fullscreen = $false
backdrop = if ($Backdrop) { $Backdrop } else { 'opaque' }
}
if (Test-Path $stateFile) {
try {
$saved = Get-Content $stateFile -Raw | ConvertFrom-Json
foreach ($k in @($saved.PSObject.Properties.Name)) { if ($script:state.Contains($k)) { $script:state[$k] = $saved.$k } }
if ($NoTopMost) { $script:state.topmost = $false }
if ($NoExclude) { $script:state.exclude = $false }
$script:state.opacity = $Opacity
$script:state.fullscreen = $false
} catch { Write-Warning "state file ignored: $($_.Exception.Message)" }
}
function Save-State {
try { ($script:state | ConvertTo-Json -Depth 3) | Set-Content -Path $stateFile -Encoding UTF8 } catch {}
}
# ---------------------------------------------------------------- 窗口
$form = New-Object DshFloat.FloatForm
$form.Text = 'DSH 悬浮窗'
$form.FormBorderStyle = 'None'
$form.StartPosition = 'Manual'
$form.ShowInTaskbar = $true
$form.MinimumSize = New-Object System.Drawing.Size(260, 240)
$form.BackColor = [System.Drawing.Color]::FromArgb(15, 17, 21)
$form.TopMost = [bool]$script:state.topmost
$form.KeyPreview = $true
# 8px 边环留给系统做缩放命中测试,WebView2 只铺在里面
$form.Padding = New-Object System.Windows.Forms.Padding(8, 8, 8, 8)
$scr = [System.Windows.Forms.Screen]::PrimaryScreen.WorkingArea
if ($script:state.x -lt 0 -or $script:state.y -lt 0) {
$script:state.x = $scr.Right - [int]$script:state.w - 24
$script:state.y = $scr.Top + 24
}
$form.Bounds = New-Object System.Drawing.Rectangle(
[int]$script:state.x, [int]$script:state.y, [int]$script:state.w, [int]$script:state.h)
# 高 DPI 下 WinForms 会把逻辑尺寸放大,这里按真实尺寸把窗口夹回屏幕内
if ($form.Right -gt $scr.Right) { $form.Left = [Math]::Max($scr.Left, $scr.Right - $form.Width - 12) }
if ($form.Bottom -gt $scr.Bottom) { $form.Top = [Math]::Max($scr.Top, $scr.Bottom - $form.Height - 12) }
if ($form.Left -lt $scr.Left) { $form.Left = $scr.Left + 12 }
if ($form.Top -lt $scr.Top) { $form.Top = $scr.Top + 12 }
$wv = New-Object Microsoft.Web.WebView2.WinForms.WebView2
$wv.Dock = 'Fill'
$form.Controls.Add($wv)
function Send-ToPage([hashtable]$Msg) {
if ($wv.CoreWebView2) {
try { $wv.CoreWebView2.PostWebMessageAsJson(($Msg | ConvertTo-Json -Depth 6 -Compress)) } catch {}
}
}
function Apply-Opacity([double]$value) {
$script:state.opacity = [Math]::Round([Math]::Max(0.25, [Math]::Min(1.0, $value)), 2)
# 观感透明度由页面 CSS 的 --alpha 决定;只有「半透明」模式才额外给整窗 alpha
if ($script:state.backdrop -eq 'translucent') { Set-WindowAlpha $script:state.opacity } else { Set-WindowAlpha 1.0 }
}
function Apply-Exclude {
# 0x11 = WDA_EXCLUDEFROMCAPTURE: 窗口从所有抓屏 API 里彻底消失(实测有效)
$aff = if ($script:state.exclude) { $WDA_EXCLUDEFROMCAPTURE } else { 0 }
[void][DshFloat.Native]::SetWindowDisplayAffinity($form.Handle, $aff)
}
function Apply-Backdrop([string]$Mode) {
if (-not $Mode) { $Mode = 'opaque' }
$script:state.backdrop = $Mode
$code = switch ($Mode) { 'mica' { 1 } 'acrylic' { 2 } 'blur' { 3 } 'translucent' { 0 } default { 0 } }
try {
$info = $form.ApplyBackdrop($code)
Log "backdrop $Mode -> $info"
} catch { Log "backdrop ERROR: $($_.Exception.Message)" }
# 玻璃模式必须让 WebView2 背景透明,否则页面自己把桌面糊住了
if ($wv.CoreWebView2) {
try {
$wv.DefaultBackgroundColor = if ($code -eq 0) { [System.Drawing.Color]::FromArgb(255, 15, 17, 21) } else { [System.Drawing.Color]::Transparent }
} catch { Log "bg color ERROR: $($_.Exception.Message)" }
}
# 半透明:整窗 alpha(WebView2 是子窗口,这条路径观感一般,作为兜底)
if ($Mode -eq 'translucent') { Apply-Opacity $script:state.opacity } else { Set-WindowAlpha 1.0 }
}
function Set-WindowAlpha([double]$value) {
$alpha = [byte][Math]::Round([Math]::Max(0.05, [Math]::Min(1.0, $value)) * 255)
$style = [DshFloat.Native]::GetWindowLong($form.Handle, -20)
if ($value -lt 1.0) {
[void][DshFloat.Native]::SetWindowLong($form.Handle, -20, $style -bor $WS_EX_LAYERED)
[void][DshFloat.Native]::SetLayeredWindowAttributes($form.Handle, 0, $alpha, 0x2)
} else {
[void][DshFloat.Native]::SetWindowLong($form.Handle, -20, $style -band (-bnot $WS_EX_LAYERED))
}
}
function Push-State {
Send-ToPage @{
type = 'state'
state = @{
topmost = [bool]$script:state.topmost
posLock = [bool]$script:state.posLock
sizeLock = [bool]$script:state.sizeLock
opacity = [double]$script:state.opacity
exclude = [bool]$script:state.exclude
scale = [double]$script:state.scale
backdrop = [string]$script:state.backdrop
fullscreen = [bool]$script:state.fullscreen
w = $form.Width; h = $form.Height
}
}
}
function Toggle-Fullscreen {
if ($script:state.fullscreen) {
$b = $script:savedBounds
if ($b) { $form.Bounds = $b }
$script:state.fullscreen = $false
} else {
$script:savedBounds = $form.Bounds
$form.WindowState = 'Normal'
$form.Bounds = [System.Windows.Forms.Screen]::FromHandle($form.Handle).Bounds
$script:state.fullscreen = $true
}
Push-State
}
function Send-Endpoint {
$payload = @{ type = 'endpoint'; baseUrl = $null; token = $null }
if (Test-Path $endpointFile) {
try {
$ep = Get-Content $endpointFile -Raw | ConvertFrom-Json
$payload.baseUrl = $ep.baseUrl; $payload.token = $ep.token
} catch {}
}
Send-ToPage $payload
}
# ---------------------------------------------------------------- 页面消息处理
$onWebMessage = {
param($sender, $args)
try {
$msg = $args.TryGetWebMessageAsString()
if (-not $msg) { $msg = $args.WebMessageAsJson }
$m = $msg | ConvertFrom-Json
} catch { return }
switch ($m.cmd) {
'ready' { Push-State; Send-Endpoint }
'drag' { if (-not $script:state.posLock) { [void][DshFloat.Native]::ReleaseCapture(); [void][DshFloat.Native]::SendMessage($form.Handle, 0xA1, [IntPtr]2, [IntPtr]::Zero) } }
'resize' { if (-not $script:state.sizeLock) { [void][DshFloat.Native]::ReleaseCapture(); [void][DshFloat.Native]::SendMessage($form.Handle, 0xA1, [IntPtr]17, [IntPtr]::Zero) } }
'close' { $form.Close() }
'minimize' { $form.WindowState = 'Minimized' }
'fullscreen' { Toggle-Fullscreen }
'topmost' { $script:state.topmost = -not $script:state.topmost; $form.TopMost = [bool]$script:state.topmost; Save-State; Push-State }
'posLock' { $script:state.posLock = -not $script:state.posLock; Save-State; Push-State }
'sizeLock' { $script:state.sizeLock = -not $script:state.sizeLock; $form.AllowResize = -not $script:state.sizeLock; Save-State; Push-State }
'exclude' { $script:state.exclude = -not $script:state.exclude; Apply-Exclude; Save-State; Push-State }
'opacity' { Apply-Opacity ([double]$m.value); Save-State; Push-State }
'backdrop' { Apply-Backdrop ([string]$m.value); Save-State; Push-State }
'scale' { $script:state.scale = [double]$m.value; $wv.ZoomFactor = [double]$m.value; Save-State; Push-State }
'reload' { $wv.Reload() }
'openExternal' { if ($m.url -match '^https?://') { Start-Process $m.url } }
}
}
# ---------------------------------------------------------------- 外部命令 / 心跳
function Invoke-Cmd([string]$c) {
switch ($c) {
'close' { $form.Close() }
'pin' { $script:state.posLock = -not $script:state.posLock; Save-State; Push-State }
'sizeLock' { $script:state.sizeLock = -not $script:state.sizeLock; $form.AllowResize = -not $script:state.sizeLock; Save-State; Push-State }
'topmost' { $script:state.topmost = -not $script:state.topmost; $form.TopMost = [bool]$script:state.topmost; Save-State; Push-State }
'fullscreen' { Toggle-Fullscreen }
'hide' { Send-ToPage @{ type = 'cmd'; cmd = 'hide' } }
'show' { $form.Show(); $form.Activate(); Send-ToPage @{ type = 'cmd'; cmd = 'show' } }
default { Send-ToPage @{ type = 'cmd'; cmd = $c } }
}
}
$script:lastEndpointText = ''
$script:lastCommandText = ''
$timer = New-Object System.Windows.Forms.Timer
$timer.Interval = 700
$timer.Add_Tick({
# endpoint.json 变了(DSH 重启 / 换端口)就重新告诉页面
try {
if (Test-Path $endpointFile) {
$t = Get-Content $endpointFile -Raw
if ($t -ne $script:lastEndpointText) { $script:lastEndpointText = $t; Send-Endpoint }
}
} catch {}
# 插件/命令行下发的动作
try {
if (Test-Path $commandFile) {
$c = Get-Content $commandFile -Raw -ErrorAction SilentlyContinue
if ($c -and $c -ne $script:lastCommandText) {
$script:lastCommandText = $c
Remove-Item $commandFile -Force -ErrorAction SilentlyContinue
$cmd = ($c | ConvertFrom-Json).cmd
Log "external cmd: $cmd"
Invoke-Cmd $cmd
}
}
} catch { Log "cmd error: $($_.Exception.Message)" }
# 心跳,宿主据此判断浮窗是否还活着
try { @{ pid = $PID; at = (Get-Date).ToString('o') } | ConvertTo-Json | Set-Content -Path $aliveFile -Encoding UTF8 } catch {}
})
$timer.Start()
# WebView2 初始化是异步的:绝不能在 UI 线程上阻塞等待(会死锁),改为事件驱动
$onWvReady = {
param($sender, $e)
if (-not $e.IsSuccess) { Log "WV2 init failed: $($e.InitializationException)"; return }
Log 'corewebview2 ready'
$s = $wv.CoreWebView2.Settings
$s.AreDefaultContextMenusEnabled = $false
$s.IsStatusBarEnabled = $false
$s.AreBrowserAcceleratorKeysEnabled = $false
$s.IsZoomControlEnabled = $true
$s.AreDevToolsEnabled = $false
$wv.CoreWebView2.add_WebMessageReceived($onWebMessage)
$wv.CoreWebView2.SetVirtualHostNameToFolderMapping('dshfloat.local', $root, 1)
Apply-Backdrop $script:state.backdrop
Apply-Opacity $script:state.opacity
$wv.CoreWebView2.Navigate("file:///$(($UiFile -replace '\\','/'))")
Log "navigated to $UiFile"
Push-State
}
$wv.add_CoreWebView2InitializationCompleted($onWvReady)
$form.Add_Shown({
Log 'form shown'
$form.AllowResize = -not $script:state.sizeLock
try {
$udf = Join-Path $stateDir 'webview2'
New-Item -ItemType Directory -Force -Path $udf | Out-Null
Log "creating WebView2 env at $udf"
# 参数顺序是 (browserExecutableFolder, userDataFolder, options)
$wvEnv = [Microsoft.Web.WebView2.Core.CoreWebView2Environment]::CreateAsync($null, $udf, $null).GetAwaiter().GetResult()
Log "env ok browser=$($wvEnv.BrowserVersionString)"
[void]$wv.EnsureCoreWebView2Async($wvEnv)
Log 'EnsureCoreWebView2Async started'
} catch {
Log "WV2 ERROR: $($_.Exception.Message)"
}
try { Apply-Exclude; $wv.ZoomFactor = [double]$script:state.scale } catch { Log "apply ERROR: $($_.Exception.Message)" }
})
$form.Add_ResizeEnd({ if (-not $script:state.fullscreen) { $script:state.w = $form.Width; $script:state.h = $form.Height; Save-State; Push-State } })
$form.Add_Move({ if (-not $script:state.fullscreen -and $form.WindowState -eq 'Normal') { $script:state.x = $form.Left; $script:state.y = $form.Top } })
$form.Add_FormClosing({ Save-State })
$form.Add_KeyDown({
param($s, $e)
if ($e.KeyCode -eq [System.Windows.Forms.Keys]::F11) { Toggle-Fullscreen }
if ($e.KeyCode -eq [System.Windows.Forms.Keys]::Escape -and $script:state.fullscreen) { Toggle-Fullscreen }
})
# 单实例已在上方处理
[void]$form.Show()
[System.Windows.Forms.Application]::Run($form)
$mutex.ReleaseMutex()