WebBrowser/WebBrowserPage.py

Sat, 18 Feb 2017 19:59:14 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 18 Feb 2017 19:59:14 +0100
changeset 5530
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parent 5389
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child 5534
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permissions
-rw-r--r--

Started upgrading the new web browser to the Qt 5.8 offerings.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2008 - 2017 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6
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7 """
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8 Module implementing the helpbrowser using QWebView.
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9 """
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10
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11 from __future__ import unicode_literals
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12 try:
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13 str = unicode # __IGNORE_EXCEPTION__
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14 except NameError:
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15 pass
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16
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17 from PyQt5.QtCore import pyqtSlot, qVersion, QUrl, QTimer, QEventLoop, QPoint
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18 from PyQt5.QtGui import QDesktopServices
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19 from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineSettings, \
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20 QWebEngineScript
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21 from PyQt5.QtWebChannel import QWebChannel
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22
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23 from WebBrowser.WebBrowserWindow import WebBrowserWindow
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24
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25 from .JavaScript.ExternalJsObject import ExternalJsObject
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26
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27 from .Tools.WebHitTestResult import WebHitTestResult
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28
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29 import Preferences
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30
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31
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32 class WebBrowserPage(QWebEnginePage):
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33 """
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34 Class implementing an enhanced web page.
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35 """
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36 if qVersion() >= "5.7.0":
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37 # SafeJsWorld = QWebEngineScript.ApplicationWorld
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38 SafeJsWorld = QWebEngineScript.MainWorld
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39 else:
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40 SafeJsWorld = QWebEngineScript.MainWorld
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41
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42 def __init__(self, parent=None):
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43 """
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44 Constructor
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45
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46 @param parent parent widget of this window (QWidget)
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47 """
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48 super(WebBrowserPage, self).__init__(
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49 WebBrowserWindow.webProfile(), parent)
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50
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51 self.__setupWebChannel()
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52
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53 self.featurePermissionRequested.connect(
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54 self.__featurePermissionRequested)
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55
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56 self.authenticationRequired.connect(
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57 WebBrowserWindow.networkManager().authentication)
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58
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59 self.proxyAuthenticationRequired.connect(
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60 WebBrowserWindow.networkManager().proxyAuthentication)
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61
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62 self.fullScreenRequested.connect(self.__fullScreenRequested)
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63
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64 self.urlChanged.connect(self.__urlChanged)
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65
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66 self.__printer = None
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67
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68 def acceptNavigationRequest(self, url, type_, isMainFrame):
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69 """
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70 Public method to determine, if a request may be accepted.
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71
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72 @param url URL to navigate to
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73 @type QUrl
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74 @param type_ type of the navigation request
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75 @type QWebEnginePage.NavigationType
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76 @param isMainFrame flag indicating, that the request originated from
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77 the main frame
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78 @type bool
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79 @return flag indicating acceptance
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80 @rtype bool
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81 """
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82 scheme = url.scheme()
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83 if scheme == "mailto":
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84 QDesktopServices.openUrl(url)
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85 return False
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86
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87 # AdBlock
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88 if url.scheme() == "abp":
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89 if WebBrowserWindow.adBlockManager().addSubscriptionFromUrl(url):
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90 return False
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91
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92 return QWebEnginePage.acceptNavigationRequest(self, url, type_,
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93 isMainFrame)
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94
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95 @pyqtSlot(QUrl)
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96 def __urlChanged(self, url):
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97 """
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98 Private slot to handle changes of the URL.
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99
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100 @param url new URL
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101 @type QUrl
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102 """
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103 if not url.isEmpty() and url.scheme() == "eric" and \
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104 not self.isJavaScriptEnabled():
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105 self.setJavaScriptEnabled(True)
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106 self.triggerAction(QWebEnginePage.Reload)
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107
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108 @classmethod
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109 def userAgent(cls, resolveEmpty=False):
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110 """
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111 Class method to get the global user agent setting.
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112
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113 @param resolveEmpty flag indicating to resolve an empty
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114 user agent (boolean)
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115 @return user agent string (string)
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116 """
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117 agent = Preferences.getWebBrowser("UserAgent")
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118 if agent == "" and resolveEmpty:
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119 agent = cls.userAgentForUrl(QUrl())
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120 return agent
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121
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122 @classmethod
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123 def setUserAgent(cls, agent):
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124 """
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125 Class method to set the global user agent string.
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126
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127 @param agent new current user agent string (string)
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128 """
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129 Preferences.setWebBrowser("UserAgent", agent)
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130
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131 @classmethod
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132 def userAgentForUrl(cls, url):
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133 """
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134 Class method to determine the user agent for the given URL.
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135
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136 @param url URL to determine user agent for (QUrl)
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137 @return user agent string (string)
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138 """
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139 agent = WebBrowserWindow.userAgentsManager().userAgentForUrl(url)
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140 if agent == "":
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141 # no agent string specified for the given host -> use global one
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142 agent = Preferences.getWebBrowser("UserAgent")
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143 if agent == "":
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144 # no global agent string specified -> use default one
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145 agent = WebBrowserWindow.webProfile().httpUserAgent()
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146 return agent
0
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147
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148 def __featurePermissionRequested(self, url, feature):
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149 """
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150 Private slot handling a feature permission request.
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151
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152 @param url url requesting the feature
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153 @type QUrl
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154 @param feature requested feature
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155 @type QWebEnginePage.Feature
0
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parents:
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156 """
4788
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157 manager = WebBrowserWindow.featurePermissionManager()
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158 manager.requestFeaturePermission(self, url, feature)
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159
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160 def execJavaScript(self, script, worldId=QWebEngineScript.MainWorld,
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161 timeout=500):
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162 """
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163 Public method to execute a JavaScript function synchroneously.
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164
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165 @param script JavaScript script source to be executed
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166 @type str
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167 @param worldId ID to run the script under
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168 @type int
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169 @param timeout max. time the script is given to execute
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170 @type int
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171 @return result of the script
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172 @rtype depending upon script result
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173 """
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174 loop = QEventLoop()
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175 resultDict = {"res": None}
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176 QTimer.singleShot(timeout, loop.quit)
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177
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178 def resultCallback(res, resDict=resultDict):
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179 if loop and loop.isRunning():
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180 resDict["res"] = res
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181 loop.quit()
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182
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183 self.runJavaScript(script, worldId, resultCallback)
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184
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185 loop.exec_()
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186 return resultDict["res"]
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187
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188 def runJavaScript(self, script, worldId=-1, callback=None):
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189 """
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190 Public method to run a script in the context of the page.
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191
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192 @param script JavaScript script source to be executed
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193 @type str
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194 @param worldId ID to run the script under
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195 @type int
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196 @param callback callback function to be executed when the script has
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197 ended
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198 @type function
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199 """
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200 if qVersion() >= "5.7.0" and worldId > -1:
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201 if callback is None:
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202 QWebEnginePage.runJavaScript(self, script, worldId)
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203 else:
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204 QWebEnginePage.runJavaScript(self, script, worldId, callback)
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205 else:
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206 if callback is None:
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207 QWebEnginePage.runJavaScript(self, script)
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208 else:
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209 QWebEnginePage.runJavaScript(self, script, callback)
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210
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211 def setJavaScriptEnabled(self, enable):
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212 """
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213 Public method to enable JavaScript.
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214
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215 @param enable flag indicating the enabled state to be set
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216 @type bool
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217 """
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218 if not self.url().isEmpty() and self.url().scheme() == "eric":
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219 enable = True
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220
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221 self.settings().setAttribute(QWebEngineSettings.JavascriptEnabled,
4978
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diff changeset
222 enable)
4964
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223
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224 def isJavaScriptEnabled(self):
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225 """
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226 Public method to test, if JavaScript is enabled.
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227
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228 @return flag indicating the state of the JavaScript support
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229 @rtype bool
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230 """
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231 return self.settings().testAttribute(
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232 QWebEngineSettings.JavascriptEnabled)
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233
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234 def scroll(self, x, y):
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235 """
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236 Public method to scroll by the given amount of pixels.
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237
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238 @param x horizontal scroll value
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239 @type int
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240 @param y vertical scroll value
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241 @type int
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242 """
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243 self.runJavaScript(
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244 "window.scrollTo(window.scrollX + {0}, window.scrollY + {1})"
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245 .format(x, y),
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246 WebBrowserPage.SafeJsWorld
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247 )
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248
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249 def mapToViewport(self, pos):
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250 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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251 Public method to map a position to the viewport.
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252
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253 @param pos position to be mapped
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254 @type QPoint
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255 @return viewport position
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256 @rtype QPoint
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257 """
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258 return QPoint(pos.x() // self.zoomFactor(),
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259 pos.y() // self.zoomFactor())
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260
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261 def hitTestContent(self, pos):
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262 """
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263 Public method to test the content at a specified position.
4717
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264
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265 @param pos position to execute the test at
4717
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266 @type QPoint
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267 @return test result object
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268 @rtype WebHitTestResult
4717
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269 """
4728
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270 return WebHitTestResult(self, pos)
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271
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272 def __setupWebChannel(self):
4717
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273 """
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274 Private method to setup a web channel to our external object.
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275 """
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276 oldChannel = self.webChannel()
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277 newChannel = QWebChannel(self)
4749
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diff changeset
278 newChannel.registerObject("eric_object", ExternalJsObject(self))
4717
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279 self.setWebChannel(newChannel)
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280
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281 if oldChannel:
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282 del oldChannel.registeredObjects["eric_object"]
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283 del oldChannel
4725
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284
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285 def certificateError(self, error):
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286 """
4726
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287 Public method to handle SSL certificate errors.
4725
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288
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289 @param error object containing the certificate error information
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290 @type QWebEngineCertificateError
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291 @return flag indicating to ignore this error
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292 @rtype bool
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293 """
4788
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294 return WebBrowserWindow.networkManager().certificateError(
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diff changeset
295 error, self.view())
4745
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296
4884
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297 def __fullScreenRequested(self, request):
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298 """
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299 Private slot handling a full screen request.
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300
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301 @param request reference to the full screen request
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302 @type QWebEngineFullScreenRequest
4884
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diff changeset
303 """
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304 self.view().requestFullScreen(request.toggleOn())
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305
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diff changeset
306 accepted = request.toggleOn() == self.view().isFullScreen()
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307
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308 if accepted:
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309 request.accept()
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310 else:
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311 request.reject()
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312
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313 def printPage(self, printer):
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314 """
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diff changeset
315 Public method to print the current page.
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316
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317 Note: This is just a wrapper around QWebEnginePage.print() to ensure
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318 the printer object is available until the print job finished.
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319
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320 @param printer reference to the printer object
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321 @type QPrinter
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322 """
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323 self.__printer = printer
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324 self.print(self.__printer, self.__printFinished)
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325
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326 def __printFinished(self, ok):
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327 """
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328 Private method called when the print job finished.
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329
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330 @param ok flag indicating a successful print
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331 @type bool
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332 """
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333 self.__printer = None
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334
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335 ##############################################
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336 ## Methods below deal with JavaScript messages
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337 ##############################################
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338
4917
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339 def javaScriptConsoleMessage(self, level, message, lineNumber, sourceId):
4822
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340 """
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341 Public method to show a console message.
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342
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343 @param level severity
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344 @type QWebEnginePage.JavaScriptConsoleMessageLevel
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345 @param message message to be shown
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346 @type str
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347 @param lineNumber line number of an error
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348 @type int
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349 @param sourceId source URL causing the error
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350 @type str
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351 """
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diff changeset
352 self.view().mainWindow().javascriptConsole().javaScriptConsoleMessage(
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diff changeset
353 level, message, lineNumber, sourceId)
5113
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diff changeset
354
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355 ##################################################
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356 ## Methods below implement compatibility functions
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357 ##################################################
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diff changeset
358
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diff changeset
359 if not hasattr(QWebEnginePage, "icon"):
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360 def icon(self):
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diff changeset
361 """
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diff changeset
362 Public method to get the web site icon.
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diff changeset
363
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diff changeset
364 @return web site icon
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365 @rtype QIcon
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diff changeset
366 """
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367 return self.view().icon()

eric ide

mercurial