js调用python改为异步; js调用python方法异常信息改为Error对象;优化自定义桥接方法的异常处理

.gitignore

@@ -1,2 +1,3 @@
 __pycache__
+unpack
 *.deb

build.sh

@@ -7,6 +7,7 @@ if [ -d unpack ]; then
   sudo rm -rf unpack
 fi
 
+find usr -type d -name __pycache__ | xargs rm -rf
 
 mkdir -p unpack/DEBIAN
 
@@ -21,6 +22,7 @@ sed -i "s/{{size}}/${_size}/" DEBIAN/control
 sed -i "s/{{version}}/${version}/" DEBIAN/control
 
 cd ..
+sudo chown -R root:root unpack/
 dpkg-deb -b unpack/ "python3-webengine-gtk3-${version}.deb"
 
 sudo rm -rf unpack

debian/control

@@ -4,7 +4,7 @@ Section: develop
 Priority: optional
 Maintainer: Yutent <yutent.io@gmail.com>
 Architecture: all
-Depends: python3 (>=3.10), python3-gi, gir1.2-gtk-3.0, python3-pil, python3-gi-cairo, gir1.2-gdkpixbuf-2.0
+Depends: python3 (>=3.10), python3-gi, gir1.2-webkit2-4.1, gir1.2-gtk-3.0, python3-pil, python3-gi-cairo, gir1.2-gdkpixbuf-2.0
 Recommends: gir1.2-ayatanaappindicator3-0.1, gir1.2-notify-0.7, gir1.2-keybinder-3.0
 Installed-Size: {{size}}
 Homepage: https://git.wkit.fun/appcat/python3-webengine-gtk3

usr/lib/python3/dist-packages/webengine/gtk3/_custom_window.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+
+import gi
+
+gi.require_version('Gtk', '3.0')
+gi.require_version("WebKit2", "4.1")
+from gi.repository import Gtk, WebKit2
+
+
+def create_same_window(origin, req):
+  WebEngine = type(origin)
+  w, h = origin.window.get_size()
+  win = Gtk.Window()
+  win.set_default_size(w, h)
+
+  web = WebEngine(win, origin)
+  web.set_zoom_level(origin.get_zoom_level())
+  web.set_settings(origin.get_settings())
+  web.load_request(req)
+  
+  win.add(web)
+  win.show_all()
+
+
+
+
+
+def create_custom_window(origin, options):
+  WebEngine = type(origin)
+  _w, _h = origin.window.get_size()
+  w = options.get('width') or _w
+  h = options.get('height') or _h
+  win = Gtk.Window()
+  win.set_default_size(w, h)
+
+  wmclass = options.get('wmclass') or 'WebEngine Window'
+  win.set_wmclass(wmclass, 'WebEngine')
+  win.set_title(options.get('title') or 'WebEngine')
+
+  if options.get('icon_path'):
+    win.set_icon_from_file(options['icon_path'])
+
+  if options.get('icon'):
+    win.set_icon_name(options['icon'])
+
+  if options.get('frame') == False:
+    win.set_decorated(False)
+
+  if options.get('x') is not None and options.get('y') is not None:
+    win.move(options.get('x'), options.get('y'))
+
+  if options.get('always_on_top') == True:
+    win.set_keep_above(options['always_on_top'])
+
+  if options.get('resizable') == False:
+    win.set_resizable(False)
+
+  
+  web = WebEngine(win, origin, options.get('uuid'))
+  web.set_root(origin.root, True)
+  web.set_zoom_level(origin.get_zoom_level())
+  web.set_settings(origin.get_settings())
+  web.load(options.get('url'))
+
+  win.add(web)
+  win.show_all()
+  return web

usr/lib/python3/dist-packages/webengine/gtk3/_env.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+
+import os
+
+home_dir = os.getenv('HOME')
+
+env = {
+  "HOME_DIR": home_dir,
+  "CONFIG_DIR": os.path.join(home_dir, '.config'),
+  "CACHE_DIR": os.path.join(home_dir, '.cache'),
+  "LANG": os.environ['LANG'] or "en_US.UTF-8"
+}

usr/lib/python3/dist-packages/webengine/gtk3/_inject.py

@@ -15,11 +15,16 @@ class Inject:
 
     self.manager = webview.get_user_content_manager()
         
-    script_data = open(self.abspath('./inject.js'), 'r').read()
+    code = open(self.abspath('./inject.js'), 'r').read()
     frame  = WebKit2.UserContentInjectedFrames.ALL_FRAMES
-    time   = WebKit2.UserScriptInjectionTime.END
-    script_data = script_data.replace("'{{env}}'", json.dumps(env))
-    script = WebKit2.UserScript(script_data, frame, time, None, None)
+    time   = WebKit2.UserScriptInjectionTime.START
+
+    code = code.replace("'{{env}}'", json.dumps(env))
+    code = code.replace("{{uuid}}", webview.uuid)
+    code = code.replace("{{app_name}}", webview.app_name)
+    code = code.replace("{{app_version}}", webview.app_version)
+
+    script = WebKit2.UserScript(code, frame, time, None, None)
 
     self.manager.add_script(script)
 

usr/lib/python3/dist-packages/webengine/gtk3/_protocal.py

@@ -1,8 +1,13 @@
 
-import os
+import gi, os
+
+gi.require_version("WebKit2", "4.1")
 from gi.repository import Gio, WebKit2
-from ._mimetypes import get_mimetype
 
+from ._mimetypes import get_mimetype
+from ._version import version
+
+__dir__ = os.path.dirname(os.path.realpath(__file__))
 
 class Protocal:
   root = ''
@@ -22,29 +27,61 @@ class Protocal:
     return os.path.join(self.root, filepath)
 
 
+  def _get_error_page(self, tips = '404 not found!'):
+    data = f"""
+<!doctype html>
+<html lang="zh-CN">
+<head>
+  <meta charset="utf-8">
+  <title>Page not found</title>
+  <style>body {{text-align: center;-webkit-user-select:none}} cite {{font-size:12px}}</style>
+</head>
+<body>
+  <h1>Oops!</h1>
+  <h2>{tips}</h2>
+  <hr>
+  <cite>WebEngine v{version}</cite>
+</body>
+</html>
+    """
+    return data
+
   def handle_response(self, req):
     schema = req.get_scheme()
     pathname = req.get_path()[1:]
     ext = pathname.split('.')[-1]
+    mimetype = get_mimetype(ext)
+
+    if pathname == ext:
+      pathname = 'index.html'
 
     # print('----------------------------------------')
-    # print(req.get_uri(),schema, pathname, ext, get_mimetype(ext))
+    # print(req.get_uri(),schema, pathname, ext, mimetype)
     # print('----------------------------------------')
 
     if schema == self.protocal:
-      data = open(self.abspath(pathname)).read()
+      filepath = self.abspath(pathname)
+      if os.path.isfile(filepath):
+        try:
+          with open(filepath) as f:
+            data = f.read()
+        except Exception:
+          data = self._get_error_page('403 Forbidden!')
+      else:
+        data = self._get_error_page()
+
       data = Gio.MemoryInputStream.new_from_data(data.encode())
 
       # ------- 更多功能的reponse ----------------
       # res = WebKit2.URISchemeResponse.new(data, -1)
-      # res.set_content_type(get_mimetype(ext))
+      # res.set_content_type(mimetype)
       # res.set_http_headers('text/html')
       # res.set_status(200)
       # req.finish_with_response(res)
       # ----------------------------------------
       
       # 简单的response
-      req.finish(data, -1, get_mimetype(ext))
+      req.finish(data, -1, mimetype)
 
 
 def create_protocal(root):

usr/lib/python3/dist-packages/webengine/gtk3/_settings.py

@@ -6,8 +6,8 @@
 import gi, os
 
 gi.require_version("WebKit2", "4.1")
-
 from gi.repository import WebKit2
+
 from ._version import version
 
 
@@ -22,7 +22,7 @@ class Settings(WebKit2.Settings):
     self.set_javascript_can_open_windows_automatically(True)
 
 
-    self.set_user_agent_with_application_details('WebEngine', version)
+    self.set_useragent_with_app('WebEngine', version)
 
 
     # indexedDB 和 localStorage 和 离线缓存
@@ -43,6 +43,9 @@ class Settings(WebKit2.Settings):
     self.set_media_playback_allows_inline(True)
 
 
+  def set_useragent_with_app(self, name, ver):
+    self.set_user_agent_with_application_details(name, ver)
+
   def set_useragent(self, str):
     self.set_user_agent(str)
 
@@ -75,6 +78,9 @@ def create_setting(options = None):
       setting.enable_devtools()
       setting.mock_devices()
 
+    if options.get('app_name') and options.get('app_version'):
+      setting.set_useragent_with_app(options['app_name'], options['app_version'])
+
     if options.get('useragent'):
       setting.set_useragent(options.get('useragent'))
 
@@ -86,6 +92,9 @@ def create_setting(options = None):
 
 
   def wrapper(app, extra = None):
+    if options is not None:
+      app.app_name = options.get('app_name')
+      app.app_version = options.get('app_version')
     app.set_settings(setting)
 
   return wrapper

usr/lib/python3/dist-packages/webengine/gtk3/_utils.py

@@ -3,8 +3,12 @@
 # @author yutent<yutent.io@gmail.com>
 # @date 2023/07/28 14:39:33
 
-import gi
-from gi.repository.GdkPixbuf import Pixbuf
+import gi, threading
+gi.require_version('Gtk', '3.0')
+from gi.repository import GdkPixbuf, GObject
+
+def noop():
+  pass
 
 def get_monitor_info(monitor):
   return {
@@ -50,7 +54,7 @@ def pixbuf_to_dict(pixbuf, filename = ''):
 
 def dict_to_pixbuf(data):
   if data:
-    image = Pixbuf.new_from_data(
+    image = GdkPixbuf.Pixbuf.new_from_data(
       data = bytes(data['bytes']),
       colorspace = data['colorspace'],
       has_alpha = data['has_alpha'],
@@ -62,4 +66,34 @@ def dict_to_pixbuf(data):
   else:
     image = None
 
-  return image
+  return image
+
+
+# 定义一个异步修饰器, 用于在子线程中运行一些会阻塞主线程的任务
+def run_async(func):
+  def wrapper(*args, **kwargs):
+    thread = threading.Thread(target=func, args=args, kwargs=kwargs)
+    thread.daemon = True
+    thread.start()
+    return thread
+  return wrapper
+
+# 类型js的settimeout的修饰器
+def set_timeout(timeout = 0.5):
+  def decorator(callback):
+    def wrapper(*args):
+      t = threading.Timer(timeout, callback, args=args)
+      t.start()
+      return t
+    return wrapper
+  
+  return decorator
+
+
+# 定义一个修饰器, 用于将当前方法转到主线程中运行 (子线程中调用方法时)
+def idle(func):
+  def wrapper(*args):
+    GObject.idle_add(func, *args)
+  return wrapper
+
+

usr/lib/python3/dist-packages/webengine/gtk3/_version.py

@@ -1,4 +1,4 @@
 #!/usr/bin/env python3
 
-build = (0, 4, 0)
+build = (0, 7, 0)
 version = '.'.join(map(str, build))

usr/lib/python3/dist-packages/webengine/gtk3/_webengine.py

@@ -3,13 +3,15 @@
 # @date 2023/08/08 14:07:26
 
 
-import gi, os, json, shutil, hashlib, time, threading
+import gi, os, sys, json
+import webbrowser, shutil, hashlib, random
 
 gi.require_version('Gtk', '3.0')
 gi.require_version("WebKit2", "4.1")
 
 
 from gi.repository import GObject, Gtk, Gdk, WebKit2, GLib, Gio, GdkPixbuf
+from ._custom_window import create_same_window, create_custom_window
 
 
 # 优先尝试使用指示器, 没有再使用 Gtk.StatusIcon
@@ -30,56 +32,50 @@ try:
 except:
   Keybinder = None
 
-
-
-
-
+from ._env import env
+from ._version import version
 from ._settings import create_setting
 from ._protocal import create_protocal
 from ._notify import create_notify
 from ._inject import Inject
-from ._utils import get_monitor_info, pixbuf_to_dict, dict_to_pixbuf
+from ._utils import noop, get_monitor_info, pixbuf_to_dict, dict_to_pixbuf, run_async, idle
 
 
 
-env = {
-  "HOME_DIR": os.getenv('HOME'),
-  "CONFIG_DIR": os.path.join(os.getenv('HOME'), '.config'),
-  "CACHE_DIR": os.path.join(os.getenv('HOME'), '.cache')
-}
-
-
-def noop():
-  pass
-
-
-	# 类型js的settimeout的修饰器
-def set_timeout(timeout = 0.5):
-  def decorator(callback):
-    def wrapper(*args):
-      t = threading.Timer(timeout, callback, args=args)
-      t.start()
-      return t
-    return wrapper
-  
-  return decorator
-
-
 class WebEngine(WebKit2.WebView):
 
   __gsignals__ = {
     'quit': (GObject.SignalFlags.RUN_FIRST, None, ())
   }
-
+  app_name = 'WebEngine'
+  app_version = version
+  uuid = None
   root = None
   window = None
+  opener = None
+  children = set()
   custom_bridge = None
 
-  def __init__(self, window):
+  def __init__(self, win, opener = None, uuid = None):
 
     WebKit2.WebView.__init__(self)
 
-    self.window = window
+    if uuid is None:
+      self.uuid = random.randbytes(8).hex()
+    else:
+      self.uuid = uuid
+
+    self.opener = opener
+    self.window = win
+
+    if opener is not None:
+      opener.children.add(self)
+
+    if win.get_title() is None:
+      win.set_title(self.app_name)
+    
+    if win.get_icon() is None and win.get_icon_name() is None:
+      win.set_icon_name('web-browser')
 
     self.clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
     self.display = Gdk.Display.get_default()
@@ -98,24 +94,44 @@ class WebEngine(WebKit2.WebView):
 
     self.connect('create', self.create_new_window)
 
+    # 允许前端 widnow.close() 关闭窗口
+    self.connect('close', self.close_window)
+
+    # 通过外部关闭窗口时从父级中移除
+    win.connect("destroy", self.remove_from_opener)
+    win.connect('hide', lambda w: self.call_js('hide'))
+    win.connect('show', lambda w: self.call_js('show'))
 
 
+  def remove_from_opener(self, win = None):
+    if self.opener is not None:
+      try:
+        self.opener.children.remove(self)
+      except:
+        pass
 
+
+  def close_window(self, wv = None):
+    self.remove_from_opener()
+    self.window.close()
+
+
+  # 响应原生js的 window.open
   def create_new_window(self, webview, nav):
     req = nav.get_request()
-    w, h = self.window.get_size()
-    win = Gtk.Window()
-    web = WebEngine(win)
-    web.set_settings(self.get_settings())
-    web.set_zoom_level(self.get_zoom_level())
-    web.load_request(req)
-    win.set_default_size(w, h)
-    win.add(web)
-    win.show_all()
+    return create_same_window(self, req)
+    
+
+  # 手动创建窗口
+  def new_window_by_custom(self, options = {}):
+    return create_custom_window(self, options)
 
 
-  def set_root(self, root):
+  def set_root(self, root, has_protocol = False):
     self.root = root
+
+    if has_protocol:
+      return self
     return self.use(create_protocal(root))
   
 
@@ -125,20 +141,28 @@ class WebEngine(WebKit2.WebView):
 
 
   def load(self, url = '/index.html'):
-    if self.root is None:
-      raise EnvironmentError('web root dir not set!')
+    if url.startswith('http://') or url.startswith('https://'):
+      self.load_uri(url)
     else:
-      self.load_uri(f"app://{url}")
-
+      if self.root is None:
+        raise EnvironmentError('web root dir not set!')
+      else:
+        if url.startswith('/'):
+          self.load_uri(f"app://{url}")
+        elif url.startswith('app://'):
+          self.load_uri(url)
+        else:
+          raise ValueError('url must starts with "/" or "app://"')
 
 
+  @idle
   def call_js(self, method, data = None, err = None):
     if err is not None:
       err = str(err)
     scripts = 'native.$emit("' + method + '", ' + json.dumps(err) + ', ' + json.dumps(data) + ')'
     self.evaluate_javascript(scripts, -1)
 
-  
+  @run_async
   def called_by_js(self, webview, message):
 
     data = json.loads(message.get_js_value().to_json(0))
@@ -151,22 +175,17 @@ class WebEngine(WebKit2.WebView):
 
 
     match event:
-      case 'init':
-        output = env
+
+      case 'app':
+        _error, output = self._app_handler(params)
 
       case 'fs':
-        _error, output = self._fs_setting(params)
+        _error, output = self._fs_handler(params)
 
 
       case 'clipboard':
-        _error, output = self._clipboard_setting(params)
+        _error, output = self._clipboard_handler(params)
         
-        
-      # 退出app
-      case 'quit':
-        self.window.close()
-        self.emit('quit')
-
       # 读取图片, 返回图片像素数据
       case 'image':
         filename = params['value']
@@ -185,7 +204,7 @@ class WebEngine(WebKit2.WebView):
 
 
       case 'keybinder':
-        _error, output = self._keybinder_setting(params)
+        _error, output = self._keybinder_handler(params)
         
 
       case 'tray':
@@ -195,8 +214,37 @@ class WebEngine(WebKit2.WebView):
         elif params['action'] == 'remove':
           pass
 
+      case 'opener':
+        callback = 'opener_message'
+        output = params.get('data')
+        uuid = json.dumps(self.uuid if self.opener else None)
+        scripts = f"native.$emit('opener_message', {json.dumps(output)}, {uuid})"
+        if self.opener is None:
+          self.evaluate_javascript(scripts, -1)
+        else:
+          self.opener.evaluate_javascript(scripts, -1)
+        return
+      
+      case 'children':
+        callback = 'opener_message'
+        output = params.get('data')
+        uuid = params.get('uuid')
+        scripts = f"native.$emit('opener_message', {json.dumps(output)})"
+        if len(self.children) == 0:
+          self.evaluate_javascript(scripts, -1)
+        else:
+          if uuid is None:
+            for child in self.children:
+              child.evaluate_javascript(scripts, -1)
+          else:
+            for child in self.children:
+              if child.uuid == uuid:
+                child.evaluate_javascript(scripts, -1)
+                break
+        return
+
       case 'window':
-        _error, output = self._window_setting(params)
+        _error, output = self._window_handler(params)
 
 
       case 'notify':
@@ -213,25 +261,61 @@ class WebEngine(WebKit2.WebView):
 
 
       case 'proxy':
-        _error, output = self._proxy_setting(params)
+        _error, output = self._proxy_handler(params)
 
 
       case 'md5':
         output = hashlib.md5(str(params.get('value'))).hexdigest()
 
       case _:
-        if self.custom_bridge is None:
-          pass
-        else:
-          _error, output = self.custom_bridge(event, params)
+        if self.custom_bridge is not None:
+          try:
+            _error, output = self.custom_bridge(event, params) or (None, None)
+          except Exception as err:
+            print(err)
+            _error = err
 
     # 有回调则返回结果
     if callback:
       self.call_js(callback, output, _error)
       
 
+  def _app_handler(self, params = {}):
+    _error = None
+    output = None
+    match(params.get('action')):
+      # 退出app
+      case 'quit':
+        self.close_window()
+        self.emit('quit')
 
-  def _fs_setting(self, params = {}):
+      case 'relaunch':
+        py = sys.executable
+        os.execl(py, py, *sys.argv)
+
+    return (_error, output)
+
+  def _shell_handler(self, params = {}):
+    _error = None
+    output = None
+    path = params.get('path')
+
+    match(params.get('action')):
+      case 'openExternal':
+        webbrowser.open(params.get('url'))
+
+      case 'showItemInFolder':
+        os.system(f"xdg-open '{path}'")
+
+      case 'openPath':
+        os.system(f"xdg-open '{path}'")
+
+      case 'trashItem':
+        pass
+
+
+
+  def _fs_handler(self, params = {}):
     _error = None
     output = None
     filepath = params.get('filepath')
@@ -301,11 +385,14 @@ class WebEngine(WebKit2.WebView):
       case 'isdir':
         output = os.path.isdir(filepath)
 
+      case 'mkdir':
+        output = os.makedirs(filepath)
+
     return (_error, output)
 
 
 
-  def _clipboard_setting(self, params = {}):
+  def _clipboard_handler(self, params = {}):
     _error = None
     output = None
 
@@ -342,7 +429,7 @@ class WebEngine(WebKit2.WebView):
     return (_error, output)
 
 
-  def _keybinder_setting(self, params = {}):
+  def _keybinder_handler(self, params = {}):
     _error = None
     output = None
     keymap = params.get('value')
@@ -373,11 +460,18 @@ class WebEngine(WebKit2.WebView):
 
 
 
-  def _window_setting(self, params = {}):
+  def _window_handler(self, params = {}):
     _error = None
     output = None
 
     match(params.get('action')):
+
+      case 'create':
+        self.new_window_by_custom(params.get('options'))
+
+      case 'close':
+        self.close_window()
+
       case 'fullscreen':
         self.window.fullscreen()
 
@@ -428,7 +522,7 @@ class WebEngine(WebKit2.WebView):
 
 
 
-  def _proxy_setting(self, params = {}):
+  def _proxy_handler(self, params = {}):
     dm = self.get_website_data_manager()
     output = True
     _error = None
@@ -445,3 +539,4 @@ class WebEngine(WebKit2.WebView):
         output = False
     return (_error, output)
 
+

usr/lib/python3/dist-packages/webengine/gtk3/inject.js

@@ -3,413 +3,509 @@
  * @author yutent<yutent.io@gmail.com>
  * @date 2023/07/21 17:38:11
  */
+!(function () {
+  const MIME_TYPES = {
+    html: 'text/html',
+    json: 'application/json',
+    js: 'application/javascript',
+    htm: 'text/html',
+    txt: 'text/plain',
+    css: 'text/css',
+    webp: 'image/webp',
+    jpg: 'image/jpg',
+    jpeg: 'image/jpeg',
+    png: 'image/png',
+    gif: 'image/gif',
+    svg: 'image/svg+xml',
+    ico: 'image/ico',
+    mp3: 'audio/mpeg',
+    ogg: 'audio/ogg',
+    m4a: 'audio/m4a',
+    amr: 'audio/amr',
+    mp4: 'video/mp4',
+    webm: 'video/webm',
+    wasm: 'application/wasm',
+    asm: 'application/asm',
+    zip: 'application/zip',
+    '7z': 'application/x-7z-compressed',
+    eot: 'application/vnd.ms-fontobject',
+    ttf: 'font/ttf',
+    otf: 'font/otf',
+    woff: 'font/woff',
+    woff2: 'font/woff2',
+    xls: 'application/vnd.ms-excel',
+    doc: 'application/msword',
+    xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+    docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
+  }
+  const KEYS_MAP = {
+    shift: '<Shift>',
+    ctrl: '<Ctrl>',
+    alt: '<Alt>',
+    super: '<Super>'
+  }
 
-const MIME_TYPES = {
-  html: 'text/html',
-  json: 'application/json',
-  js: 'application/javascript',
-  htm: 'text/html',
-  txt: 'text/plain',
-  css: 'text/css',
-  webp: 'image/webp',
-  jpg: 'image/jpg',
-  jpeg: 'image/jpeg',
-  png: 'image/png',
-  gif: 'image/gif',
-  svg: 'image/svg+xml',
-  ico: 'image/ico',
-  mp3: 'audio/mpeg',
-  ogg: 'audio/ogg',
-  m4a: 'audio/m4a',
-  amr: 'audio/amr',
-  mp4: 'video/mp4',
-  webm: 'video/webm',
-  wasm: 'application/wasm',
-  asm: 'application/asm',
-  zip: 'application/zip',
-  '7z': 'application/x-7z-compressed',
-  eot: 'application/vnd.ms-fontobject',
-  ttf: 'font/ttf',
-  otf: 'font/otf',
-  woff: 'font/woff',
-  woff2: 'font/woff2',
-  xls: 'application/vnd.ms-excel',
-  doc: 'application/msword',
-  xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
-  docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
-}
-const KEYS_MAP = {
-  shift: '<Shift>',
-  ctrl: '<Ctrl>',
-  alt: '<Alt>',
-  super: '<Super>'
-}
+  const NO_CALLBACK = false
+  const CALL_ONCE = true
 
-function defer() {
-  let obj = {}
-  obj.promise = new Promise((resolve, reject) => {
-    obj.resolve = resolve
-    obj.reject = reject
-  })
-  return obj
-}
+  const __events__ = Symbol('events')
 
-function rand(prefix = 'cb_') {
-  return prefix + Math.random().toString().slice(2)
-}
+  function defer() {
+    let obj = {}
+    obj.promise = new Promise((resolve, reject) => {
+      obj.resolve = resolve
+      obj.reject = reject
+    })
+    return obj
+  }
 
-function handler(event, data = {}, once = true) {
-  let _ = defer()
-  let callback
+  function rand(prefix = 'cb_') {
+    return prefix + Math.random().toString().slice(2)
+  }
 
-  if (typeof once === 'boolean') {
-    callback = rand()
-    native[once ? '$once' : '$on'](callback, (err, res) => {
-      if (err) {
-        _.reject(err)
-      } else {
-        _.resolve(res)
+  function handler(event, data = {}, need = CALL_ONCE) {
+    let _ = defer()
+    let callback
+
+    if (need === NO_CALLBACK) {
+      _.resolve(true)
+    } else {
+      callback = rand()
+      native.$once(callback, (err, res) => {
+        if (err) {
+          _.reject(new Error(err))
+        } else {
+          _.resolve(res)
+        }
+      })
+    }
+
+    window.webkit.messageHandlers.app.postMessage({
+      event,
+      data,
+      callback
+    })
+    return _.promise
+  }
+
+  function base64(str = '') {
+    return btoa(str).replace(/[+=\/]/g, '')
+  }
+
+  function _postMessage(data = {}, uuid = null) {
+    let ev = new Event('message')
+    Object.assign(ev, {
+      data,
+      source: {
+        postMessage(msg) {
+          native.children.postMessage(msg, uuid)
+        }
       }
     })
-  } else {
-    _.resolve(true)
-  }
-  window.webkit.messageHandlers.app.postMessage({
-    event,
-    data,
-    callback
-  })
-  return _.promise
-}
-
-function base64(str = '') {
-  return btoa(str).replace(/[+=\/]/g, '')
-}
-
-class NativeImage {
-  #origin
-
-  constructor(obj) {
-    this.#origin = obj
-    this.width = obj.width
-    this.height = obj.height
-    this.type = MIME_TYPES[obj.filepath.split('.').pop()]
+    window.dispatchEvent(ev)
   }
 
-  toJSON() {
-    return this.#origin
+  function readonly(obj, key, value) {
+    Object.defineProperty(obj, key, {
+      get() {
+        return value
+      },
+      enumerable: false
+    })
   }
 
-  export(type, base64) {
-    let _ = defer()
-    let canvas = document.createElement('canvas')
-    canvas.width = this.width
-    canvas.height = this.height
-    let ctx = canvas.getContext('2d')
-    let imgData = ctx.getImageData(0, 0, this.width, this.height)
-    let data = imgData.data
-
-    for (let i = 0; i < this.#origin.bytes.length; i += 4) {
-      imgData.data[i] = this.#origin.bytes[i]
-      imgData.data[i + 1] = this.#origin.bytes[i + 1]
-      imgData.data[i + 2] = this.#origin.bytes[i + 2]
-      imgData.data[i + 3] = this.#origin.bytes[i + 3]
-    }
-
-    ctx.putImageData(imgData, 0, 0)
-
-    if (base64) {
-      return canvas.toDataURL(type || this.type, 1)
-    } else {
-      canvas.toBlob(_.resolve, type || this.type, 1)
-      return _.promise
+  function _extend(origin, options = {}) {
+    for (let k in options) {
+      readonly(origin, k, options[k])
     }
   }
 
-  toPNG() {
-    return this.export('image/png')
-  }
+  class NativeImage {
+    #origin
 
-  toJPEG() {
-    return this.export('image/jpeg')
-  }
-
-  toDataURL(type) {
-    return this.export(type, true)
-  }
-}
-
-class EventEmitter {
-  //
-  __events__ = Object.create(null)
-
-  $on(name, fn) {
-    if (this.__events__[name]) {
-      this.__events__[name].push(fn)
-    } else {
-      this.__events__[name] = [fn]
+    constructor(obj) {
+      this.#origin = obj
+      this.width = obj.width
+      this.height = obj.height
+      this.type = MIME_TYPES[obj.filepath.split('.').pop()]
     }
-  }
 
-  $once(name, fn) {
-    fn.__once__ = true
-    this.$on(name, fn)
-  }
+    toJSON() {
+      return this.#origin
+    }
 
-  $off(name, fn) {
-    if (this.__events__[name]) {
-      if (fn) {
-        this.__events__[name] = this.__events__[name].filter(it => it !== fn)
+    export(type, base64) {
+      let _ = defer()
+      let canvas = document.createElement('canvas')
+      canvas.width = this.width
+      canvas.height = this.height
+      let ctx = canvas.getContext('2d')
+      let imgData = ctx.getImageData(0, 0, this.width, this.height)
+      let data = imgData.data
+
+      for (let i = 0; i < this.#origin.bytes.length; i += 4) {
+        imgData.data[i] = this.#origin.bytes[i]
+        imgData.data[i + 1] = this.#origin.bytes[i + 1]
+        imgData.data[i + 2] = this.#origin.bytes[i + 2]
+        imgData.data[i + 3] = this.#origin.bytes[i + 3]
+      }
+
+      ctx.putImageData(imgData, 0, 0)
+
+      if (base64) {
+        return canvas.toDataURL(type || this.type, 1)
       } else {
-        this.__events__[name] = []
+        canvas.toBlob(_.resolve, type || this.type, 1)
+        return _.promise
       }
     }
+
+    toPNG() {
+      return this.export('image/png')
+    }
+
+    toJPEG() {
+      return this.export('image/jpeg')
+    }
+
+    toDataURL(type) {
+      return this.export(type, true)
+    }
   }
 
-  $emit(name, ...args) {
-    if (this.__events__[name]) {
-      for (let fn of this.__events__[name]) {
-        try {
-          fn.apply(this, args)
-          if (fn.__once__) {
-            this.$off(name, fn)
-          }
-        } catch (e) {
-          console.error(e)
+  class Native {
+    //
+    [__events__] = Object.create(null)
+
+    $on(name, fn) {
+      if (this[__events__][name]) {
+        this[__events__][name].push(fn)
+      } else {
+        this[__events__][name] = [fn]
+      }
+    }
+
+    $once(name, fn) {
+      fn.__once__ = true
+      this.$on(name, fn)
+    }
+
+    $off(name, fn) {
+      if (this[__events__][name]) {
+        if (fn) {
+          this[__events__][name] = this[__events__][name].filter(
+            it => it !== fn
+          )
+        } else {
+          this[__events__][name] = []
         }
       }
     }
-  }
 
-  $destroy() {
-    this.__events__ = Object.create(null)
-  }
-}
-
-window.native = new EventEmitter()
-
-Object.assign(native, {
-  env: '{{env}}',
-
-  quit() {
-    return handler('quit', {}, null)
-  },
-  fs: {
-    access(filepath, mode = 'r') {
-      return handler('fs', { action: 'access', mode, filepath })
-    },
-
-    read(filepath, mode = 'r') {
-      return handler('fs', { action: 'read', mode, filepath }).then(r =>
-        mode.includes('b') ? new Uint8Array(r) : r
-      )
-    },
-    write(filepath, content = '', mode = 'w') {
-      return handler('fs', {
-        action: 'write',
-        mode,
-        filepath,
-        content
-      })
-    },
-    append(filepath, content = '', mode = 'a+') {
-      return handler('fs', {
-        action: 'write',
-        mode,
-        filepath,
-        content
-      })
-    },
-    exists(filepath) {
-      return handler('fs', { action: 'exists', filepath })
-    },
-    list(filepath) {
-      return handler('fs', { action: 'list', filepath })
-    },
-    isfile(filepath) {
-      return handler('fs', { action: 'isfile', filepath })
-    },
-    isdir(filepath) {
-      return handler('fs', { action: 'isdir', filepath })
-    },
-    remove(filepath) {
-      return handler('fs', { action: 'remove', filepath })
-    },
-    rename(filepath, target) {
-      return handler('fs', { action: 'rename', filepath, target })
-    },
-    copy(filepath, target) {
-      return handler('fs', { action: 'copy', filepath, target })
-    }
-  },
-  image(filepath) {
-    return handler('image', { value: filepath }).then(r => new NativeImage(r))
-  },
-  clipboard: {
-    readText() {
-      return handler('clipboard', { action: 'wait_for_text' })
-    },
-    writeText(value) {
-      return handler('clipboard', { action: 'set_text', value }, null)
-    },
-    readImage() {
-      return handler('clipboard', { action: 'wait_for_image' }).then(r =>
-        r ? new NativeImage(r) : r
-      )
-    },
-    writeImage(value) {
-      // 暂不知原因, postMessage传给Gtk后, JSON.stringify()并未读取toJSON的结果
-      if (typeof value === 'object') {
-        value = value.toJSON()
-      }
-      return handler('clipboard', { action: 'set_image', value }, null)
-    },
-    clear() {
-      return handler('clipboard', { action: 'clear' })
-    }
-  },
-  screen: {
-    getAllDisplays() {
-      return handler('monitor', { action: 'get-all' })
-    },
-    getPrimaryDisplay() {
-      return handler('monitor', { action: 'get-primary' })
-    }
-  },
-  globalShortcut: {
-    get enabled() {
-      return handler('keybinder', { action: 'supported' })
-    },
-    register(keyMap, callback) {
-      let shortcut_callback = base64(keyMap)
-      native.$off(shortcut_callback)
-      native.$on(shortcut_callback, callback)
-      return handler('keybinder', {
-        action: 'register',
-        value: keyMap,
-        shortcut_callback
-      })
-    },
-    unregister(keyMap) {
-      let shortcut_callback = base64(keyMap)
-      native.$off(shortcut_callback)
-      return handler('keybinder', { action: 'unregister', value: keyMap })
-    },
-    unregisterAll(keyMaps) {
-      for (let it of keyMaps) {
-        this.unregister(it)
+    $emit(name, ...args) {
+      if (this[__events__][name]) {
+        for (let fn of this[__events__][name]) {
+          try {
+            fn.apply(this, args)
+            if (fn.__once__) {
+              this.$off(name, fn)
+            }
+          } catch (e) {
+            console.error(e)
+          }
+        }
       }
     }
-  },
-  tray: {
-    create() {
-      //
-    },
-    remove() {
-      //
-    },
 
-    /**
-     * 设置普通状态的tray图标, 只需要传名称, 自动会去当前主题下去找
-     */
-    set_icon(name) {
-      return handler('tray', { action: 'set_icon', value: name })
-    },
-
-    /**
-     * 设置警示图标, 同上
-     */
-    set_attention_icon(name) {
-      return handler('tray', { action: 'set_attention_icon', value: name })
-    },
-
-    /**
-     *
-     */
-    set_title(title) {
-      return handler('tray', { action: 'set_title', value: title })
-    },
-
-    /**
-     * 修改tray图标状态
-     * @param status <Number>  0: 隐藏, 1: 显示, 2: 重要(对应上面的attention_icon)
-     */
-    set_status(status) {
-      return handler('tray', { action: 'set_status', value: status })
+    $destroy() {
+      this[__events__] = Object.create(null)
     }
-  },
-  window: {
-    isVisible() {
-      return handler('window', { action: 'is_visible' })
-    },
-    toggleVisible() {
-      handler('window', { action: 'toggle_visible' }, null)
-    },
-    hide() {
-      handler('window', { action: 'hide' }, null)
-    },
-    show() {
-      handler('window', { action: 'show' }, null)
-    },
-    fullscreen() {
-      handler('window', { action: 'fullscreen' }, null)
-    },
-    unfullscreen() {
-      handler('window', { action: 'unfullscreen' }, null)
-    },
-    maximize() {
-      handler('window', { action: 'maximize' }, null)
-    },
-    unmaximize() {
-      handler('window', { action: 'unmaximize' }, null)
-    },
-    setTitle(title = '') {
-      handler('window', { action: 'set_title', value: title }, null)
-    },
-    resize(width = 0, height = 0) {
-      handler('window', { action: 'resize', value: { width, height } }, null)
-    },
-    move(x = 0, y = 0) {
-      handler('window', { action: 'resize', value: { x, y } }, null)
-    },
-    setOpacity(opacity = 1) {
-      handler('window', { action: 'set_opacity', value: opacity }, null)
-    },
-    alwayOnTop(setting = true) {
-      handler('window', { action: 'set_keep_above', value: setting }, null)
-    },
-    alwayOnBotttom(setting = true) {
-      handler('window', { action: 'set_keep_below', value: setting }, null)
-    }
-  },
-  notify({ title, summary, icon, progress = 0, urgency = 0, callback }) {
-    let eventName
-    if (callback) {
-      eventName = rand()
-      native.$once(eventName, callback)
-    }
-    handler(
-      'notify',
-      { title, summary, icon, progress, urgency, callback: eventName },
-      null
-    )
-  },
+  }
 
-  md5(value = '') {
-    return handler('md5', { value })
-  },
+  readonly(window, 'native', new Native())
 
-  proxy: {
-    disable() {
-      return handler('proxy', { action: 'disable' })
-    },
-    system() {
-      return handler('proxy', { action: 'system' })
-    },
-    custom(url = '', ignore = null) {
-      return handler('proxy', { action: 'enable', url, ignore })
-    }
-  },
+  native.$on('opener_message', (data, uuid) => _postMessage(data, uuid))
 
-  handler
-})
+  _extend(native, {
+    env: '{{env}}',
+    app: {
+      name: '{{app_name}}',
+      version: '{{app_version}}',
+      quit() {
+        return handler('app', { action: 'quit' }, NO_CALLBACK)
+      },
+      relaunch() {
+        return handler('app', { action: 'relaunch' }, NO_CALLBACK)
+      },
+      getLocale() {
+        return native.env.LANG
+      }
+    },
+    shell: {
+      openExternal(url) {},
+      showItemInFolder(path) {},
+      openPath(path) {},
+      trashItem(path) {}
+    },
+    fs: {
+      access(filepath, mode = 'r') {
+        return handler('fs', { action: 'access', mode, filepath })
+      },
+
+      read(filepath, mode = 'r') {
+        return handler('fs', { action: 'read', mode, filepath }).then(r =>
+          mode.includes('b') ? new Uint8Array(r) : r
+        )
+      },
+      write(filepath, content = '', mode = 'w') {
+        return handler('fs', {
+          action: 'write',
+          mode,
+          filepath,
+          content
+        })
+      },
+      append(filepath, content = '', mode = 'a+') {
+        return handler('fs', {
+          action: 'write',
+          mode,
+          filepath,
+          content
+        })
+      },
+      exists(filepath) {
+        return handler('fs', { action: 'exists', filepath })
+      },
+      list(filepath) {
+        return handler('fs', { action: 'list', filepath })
+      },
+      isfile(filepath) {
+        return handler('fs', { action: 'isfile', filepath })
+      },
+      isdir(filepath) {
+        return handler('fs', { action: 'isdir', filepath })
+      },
+      remove(filepath) {
+        return handler('fs', { action: 'remove', filepath })
+      },
+      rename(filepath, target) {
+        return handler('fs', { action: 'rename', filepath, target })
+      },
+      copy(filepath, target) {
+        return handler('fs', { action: 'copy', filepath, target })
+      },
+      mkdir(filepath) {
+        return handler('fs', { action: 'mkdir', filepath })
+      }
+    },
+    image(filepath) {
+      return handler('image', { value: filepath }).then(r => new NativeImage(r))
+    },
+    clipboard: {
+      readText() {
+        return handler('clipboard', { action: 'wait_for_text' })
+      },
+      writeText(value) {
+        return handler('clipboard', { action: 'set_text', value }, NO_CALLBACK)
+      },
+      readImage() {
+        return handler('clipboard', { action: 'wait_for_image' }).then(r =>
+          r ? new NativeImage(r) : r
+        )
+      },
+      writeImage(value) {
+        // 暂不知原因, postMessage传给Gtk后, JSON.stringify()并未读取toJSON的结果
+        if (typeof value === 'object') {
+          value = value.toJSON()
+        }
+        return handler('clipboard', { action: 'set_image', value }, NO_CALLBACK)
+      },
+      clear() {
+        return handler('clipboard', { action: 'clear' }, NO_CALLBACK)
+      }
+    },
+    screen: {
+      getAllDisplays() {
+        return handler('monitor', { action: 'get-all' })
+      },
+      getPrimaryDisplay() {
+        return handler('monitor', { action: 'get-primary' })
+      }
+    },
+    globalShortcut: {
+      get enabled() {
+        return handler('keybinder', { action: 'supported' })
+      },
+      register(keyMap, callback) {
+        let shortcut_callback = base64(keyMap)
+        native.$off(shortcut_callback)
+        native.$on(shortcut_callback, callback)
+        return handler('keybinder', {
+          action: 'register',
+          value: keyMap,
+          shortcut_callback
+        })
+      },
+      unregister(keyMap) {
+        let shortcut_callback = base64(keyMap)
+        native.$off(shortcut_callback)
+        return handler('keybinder', { action: 'unregister', value: keyMap })
+      },
+      unregisterAll(keyMaps) {
+        for (let it of keyMaps) {
+          this.unregister(it)
+        }
+      }
+    },
+    tray: {
+      create() {
+        //
+      },
+      remove() {
+        //
+      },
+
+      /**
+       * 设置普通状态的tray图标, 只需要传名称, 自动会去当前主题下去找
+       */
+      set_icon(name) {
+        return handler('tray', { action: 'set_icon', value: name })
+      },
+
+      /**
+       * 设置警示图标, 同上
+       */
+      set_attention_icon(name) {
+        return handler('tray', { action: 'set_attention_icon', value: name })
+      },
+
+      /**
+       *
+       */
+      set_title(title) {
+        return handler('tray', { action: 'set_title', value: title })
+      },
+
+      /**
+       * 修改tray图标状态
+       * @param status <Number>  0: 隐藏, 1: 显示, 2: 重要(对应上面的attention_icon)
+       */
+      set_status(status) {
+        return handler('tray', { action: 'set_status', value: status })
+      }
+    },
+    opener: {
+      postMessage(data = {}) {
+        return handler('opener', { action: 'postmessage', data }, NO_CALLBACK)
+      }
+    },
+    children: {
+      postMessage(data = {}, uuid = null) {
+        return handler(
+          'children',
+          { action: 'postmessage', data, uuid },
+          NO_CALLBACK
+        )
+      }
+    },
+    window: {
+      uuid: '{{uuid}}',
+      create(options = {}) {
+        return handler('window', { action: 'create', options })
+      },
+
+      close() {
+        return handler('window', { action: 'close' })
+      },
+
+      isVisible() {
+        return handler('window', { action: 'is_visible' })
+      },
+      toggleVisible() {
+        handler('window', { action: 'toggle_visible' }, NO_CALLBACK)
+      },
+      hide() {
+        handler('window', { action: 'hide' }, NO_CALLBACK)
+      },
+      show() {
+        handler('window', { action: 'show' }, NO_CALLBACK)
+      },
+      fullscreen() {
+        handler('window', { action: 'fullscreen' }, NO_CALLBACK)
+      },
+      unfullscreen() {
+        handler('window', { action: 'unfullscreen' }, NO_CALLBACK)
+      },
+      maximize() {
+        handler('window', { action: 'maximize' }, NO_CALLBACK)
+      },
+      unmaximize() {
+        handler('window', { action: 'unmaximize' }, NO_CALLBACK)
+      },
+      setTitle(title = '') {
+        handler('window', { action: 'set_title', value: title }, NO_CALLBACK)
+      },
+      resize(width = 0, height = 0) {
+        handler(
+          'window',
+          { action: 'resize', value: { width, height } },
+          NO_CALLBACK
+        )
+      },
+      move(x = 0, y = 0) {
+        handler('window', { action: 'move', value: { x, y } }, NO_CALLBACK)
+      },
+      setOpacity(opacity = 1) {
+        handler(
+          'window',
+          { action: 'set_opacity', value: opacity },
+          NO_CALLBACK
+        )
+      },
+      alwayOnTop(setting = true) {
+        handler(
+          'window',
+          { action: 'set_keep_above', value: setting },
+          NO_CALLBACK
+        )
+      },
+      alwayOnBotttom(setting = true) {
+        handler(
+          'window',
+          { action: 'set_keep_below', value: setting },
+          NO_CALLBACK
+        )
+      }
+    },
+    notify({ title, summary, icon, progress = 0, urgency = 0, callback }) {
+      let eventName
+      if (callback) {
+        eventName = rand()
+        native.$once(eventName, callback)
+      }
+      handler(
+        'notify',
+        { title, summary, icon, progress, urgency, callback: eventName },
+        NO_CALLBACK
+      )
+    },
+
+    md5(value = '') {
+      return handler('md5', { value })
+    },
+
+    proxy: {
+      disable() {
+        return handler('proxy', { action: 'disable' }, NO_CALLBACK)
+      },
+      system() {
+        return handler('proxy', { action: 'system' }, NO_CALLBACK)
+      },
+      custom(url = '', ignore = null) {
+        return handler('proxy', { action: 'enable', url, ignore }, NO_CALLBACK)
+      }
+    },
+
+    handler
+  })
+})()