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import json
import logging
import sys
import webbrowser
import winreg
from ctypes import windll
from threading import Semaphore
import clr
from webview import _settings
from webview.js import alert
from webview.js.css import disable_text_select
from webview.util import (DEFAULT_HTML, inject_base_uri, interop_dll_path, js_bridge_call,
inject_pywebview)
clr.AddReference('System.Windows.Forms')
clr.AddReference('System.Collections')
clr.AddReference('System.Threading')
import System.Windows.Forms as WinForms
clr.AddReference(interop_dll_path('WebBrowserInterop.dll'))
from WebBrowserInterop import IWebBrowserInterop, WebBrowserEx
logger = logging.getLogger('pywebview')
settings = {}
def _set_ie_mode():
"""
By default hosted IE control emulates IE7 regardless which version of IE is installed. To fix this, a proper value
must be set for the executable.
See http://msdn.microsoft.com/en-us/library/ee330730%28v=vs.85%29.aspx#browser_emulation for details on this
behaviour.
"""
import winreg
def get_ie_mode():
"""
Get the installed version of IE
:return:
"""
ie_key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Internet Explorer')
try:
version, type = winreg.QueryValueEx(ie_key, 'svcVersion')
except:
version, type = winreg.QueryValueEx(ie_key, 'Version')
winreg.CloseKey(ie_key)
if version.startswith('11'):
value = 0x2AF9
elif version.startswith('10'):
value = 0x2711
elif version.startswith('9'):
value = 0x270F
elif version.startswith('8'):
value = 0x22B8
else:
value = 0x2AF9 # Set IE11 as default
return value
try:
browser_emulation = winreg.OpenKey(
winreg.HKEY_CURRENT_USER,
r'Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION',
0,
winreg.KEY_ALL_ACCESS,
)
except WindowsError:
browser_emulation = winreg.CreateKeyEx(
winreg.HKEY_CURRENT_USER,
r'Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION',
0,
winreg.KEY_ALL_ACCESS,
)
try:
dpi_support = winreg.OpenKey(
winreg.HKEY_CURRENT_USER,
r'Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_96DPI_PIXEL',
0,
winreg.KEY_ALL_ACCESS,
)
except WindowsError:
dpi_support = winreg.CreateKeyEx(
winreg.HKEY_CURRENT_USER,
r'Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_96DPI_PIXEL',
0,
winreg.KEY_ALL_ACCESS,
)
mode = get_ie_mode()
executable_name = sys.executable.split('\\')[-1]
winreg.SetValueEx(browser_emulation, executable_name, 0, winreg.REG_DWORD, mode)
winreg.CloseKey(browser_emulation)
winreg.SetValueEx(dpi_support, executable_name, 0, winreg.REG_DWORD, 1)
winreg.CloseKey(dpi_support)
class MSHTML:
alert = None
class JSBridge(IWebBrowserInterop):
__namespace__ = 'MSHTML.JSBridge'
window = None
def call(self, func_name, param, value_id):
return js_bridge_call(self.window, func_name, json.loads(param), value_id)
def alert(self, message):
MSHTML.alert(message)
def console(self, message):
print(message)
def __init__(self, form, window, alert):
self.pywebview_window = window
self.web_view = WebBrowserEx()
self.web_view.Dock = WinForms.DockStyle.Fill
self.web_view.ScriptErrorsSuppressed = not _settings['debug']
self.web_view.IsWebBrowserContextMenuEnabled = _settings['debug']
self.web_view.WebBrowserShortcutsEnabled = False
self.web_view.DpiAware = True
MSHTML.alert = alert
user_agent = _settings['user_agent'] or settings.get('user_agent')
if user_agent:
self.web_view.ChangeUserAgent(user_agent)
self.web_view.ScriptErrorsSuppressed = not _settings['debug']
self.web_view.IsWebBrowserContextMenuEnabled = _settings['debug']
self.js_result_semaphore = Semaphore(0)
self.js_bridge = MSHTML.JSBridge()
self.js_bridge.window = window
self.web_view.ObjectForScripting = self.js_bridge
# HACK. Hiding the WebBrowser is needed in order to show a non-default background color. Tweaking the Visible property
# results in showing a non-responsive control, until it is loaded fully. To avoid this, we need to disable this behaviour
# for the default background color.
if window.background_color != '#FFFFFF':
self.web_view.Visible = False
self.first_load = True
else:
self.first_load = False
self.cancel_back = False
self.web_view.PreviewKeyDown += self.on_preview_keydown
self.web_view.Navigating += self.on_navigating
self.web_view.NewWindow3 += self.on_new_window
self.web_view.DownloadComplete += self.on_download_complete
self.web_view.DocumentCompleted += self.on_document_completed
if window.real_url:
self.web_view.Navigate(window.real_url)
elif window.html:
self.web_view.DocumentText = window.html
else:
self.web_view.DocumentText = DEFAULT_HTML
self.form = form
form.Controls.Add(self.web_view)
def evaluate_js(self, script):
result = self.web_view.Document.InvokeScript('eval', (script,))
self.js_result = None if result is None or result == 'null' else json.loads(result) ##
self.js_result_semaphore.release()
def load_html(self, content, base_uri):
self.web_view.DocumentText = inject_base_uri(content, base_uri)
self.pywebview_window.events.loaded.clear()
def load_url(self, url):
self.web_view.Navigate(url)
def on_preview_keydown(self, _, args):
if args.KeyCode == WinForms.Keys.Back:
self.cancel_back = True
elif args.KeyCode == WinForms.Keys.Delete:
self.web_view.Document.ExecCommand('Delete', False, None)
elif args.Modifiers == WinForms.Keys.Control and args.KeyCode == WinForms.Keys.C:
self.web_view.Document.ExecCommand('Copy', False, None)
elif args.Modifiers == WinForms.Keys.Control and args.KeyCode == WinForms.Keys.X:
self.web_view.Document.ExecCommand('Cut', False, None)
elif args.Modifiers == WinForms.Keys.Control and args.KeyCode == WinForms.Keys.V:
self.web_view.Document.ExecCommand('Paste', False, None)
elif args.Modifiers == WinForms.Keys.Control and args.KeyCode == WinForms.Keys.Z:
self.web_view.Document.ExecCommand('Undo', False, None)
elif args.Modifiers == WinForms.Keys.Control and args.KeyCode == WinForms.Keys.A:
self.web_view.Document.ExecCommand('selectAll', False, None)
def on_new_window(self, sender, args):
args.Cancel = True
webbrowser.open(args.Url)
def on_download_complete(self, *_):
pass
def on_navigating(self, _, args):
if self.cancel_back:
args.Cancel = True
self.cancel_back = False
def on_document_completed(self, _, args):
document = self.web_view.Document
document.InvokeScript('eval', (alert.src,))
if _settings['debug']:
document.InvokeScript(
'eval',
(
'window.console = { log: function(msg) { window.external.console(JSON.stringify(msg)) }}',
),
)
if self.first_load:
self.web_view.Visible = True
self.first_load = False
self.url = None if args.Url.AbsoluteUri == 'about:blank' else str(args.Url.AbsoluteUri)
document.InvokeScript('eval', (inject_pywebview(self.pywebview_window, 'mshtml'),))
if not self.pywebview_window.text_select:
document.InvokeScript('eval', (disable_text_select,))
self.pywebview_window.events.loaded.set()
if self.pywebview_window.easy_drag:
document.MouseMove += self.on_mouse_move
def on_mouse_move(self, _, e):
if e.MouseButtonsPressed == WinForms.MouseButtons.Left:
WebBrowserEx.ReleaseCapture()
windll.user32.SendMessageW(
self.form.Handle.ToInt32(),
WebBrowserEx.WM_NCLBUTTONDOWN,
WebBrowserEx.HT_CAPTION,
6,
)
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