def on_title_change(self, webview, title):
title = webview.get_title()
try:
js_data = json.loads(title)
if 'type' not in js_data:
return
elif js_data['type'] == 'eval' and old_webkit: # return result of evaluate_js
unique_id = js_data['uid']
result = js_data['result'] if 'result' in js_data else None
js = self.js_results[unique_id]
js['result'] = result
js['semaphore'].release()
elif js_data['type'] == 'invoke': # invoke js api's function
func_name = js_data['function']
value_id = js_data['id']
param = js_data['param'] if 'param' in js_data else None
return_val = self.js_bridge.call(func_name, param, value_id)
# Give back the return value to JS as a string
code = 'pywebview._bridge.return_val = "{0}";'.format(escape_string(str(return_val)))
webview.run_javascript(code)
except ValueError: # Python 2
logger.debug('GTK: JSON decode failed:\n %s' % title)
except json.JSONDecodeError: # Python 3
logger.debug('GTK: JSON decode failed:\n %s' % title)
def on_title_change(self, webview, title):
title = webview.get_title()
try:
js_data = json.loads(title)
if 'type' not in js_data:
return
elif js_data['type'] == 'eval': # return result of evaluate_js
unique_id = js_data['uid']
result = js_data['result'] if 'result' in js_data else None
js = self.js_results[unique_id]
js['result'] = result
js['semaphore'].release()
elif js_data['type'] == 'invoke': # invoke js api's function
func_name = js_data['function']
param = js_data['param'] if 'param' in js_data else None
return_val = self.js_bridge.call(func_name, param)
# Give back the return value to JS as a string
code = 'pywebview._bridge.return_val = "{0}";'.format(escape_string(str(return_val)))
webview.run_javascript(code)
except ValueError: # Python 2
pass
except json.JSONDecodeError: # Python 3
pass
def on_load_finished(self):
if self.js_bridge.api:
self._set_js_api()
else:
self.load_event.set()
if not self.text_select:
self.evaluate_js(escape_string(disable_text_select))
def _evaluate_js():
document = self.browser.web_browser.Document
script_element = document.CreateElement('script')
function_name = 'invoke' + uuid1().hex
code = 'function {0}() {{return eval("{1}")}}'.format(
function_name, escape_string(script))
script_element.InnerText = code
document.Body.AppendChild(script_element)
self._js_result = document.InvokeScript(function_name)
self._js_result_semaphor.release()
def on_status_change(self, webview, status):
try:
delim = '_' + self.js_bridge.uid + '_'
except AttributeError:
return
# Check if status was updated by a JSBridge call
if status.startswith(delim):
_, func_name, param = status.split(delim)
return_val = self.js_bridge.call(func_name, param)
# Give back the return value to JS as a string
code = 'pywebview._bridge.return_val = "{0}";'.format(escape_string(str(return_val)))
webview.execute_script(code)
def evaluate_js(self, script):
def _evaluate_js():
self.webview.execute_script(code)
self._js_result_semaphore.release()
unique_id = uuid1().hex
# Backup the doc title and store the result in it with a custom prefix
code = 'oldTitle{0} = document.title; document.title = eval("{1}");'.format(
unique_id, escape_string(script))
glib.idle_add(_evaluate_js)
self._js_result_semaphore.acquire()
# Restore document title and return
_js_result = self.webview.get_title()
code = 'document.title = oldTitle{0};'.format(unique_id)
glib.idle_add(self.webview.execute_script, code)
return _js_result
