331239de05
we need to avoid calling setHtml() until the bridge command has had a chance to pass its return code back down the channel
254 lines
7.9 KiB
Python
254 lines
7.9 KiB
Python
# Copyright: Damien Elmes <anki@ichi2.net>
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# -*- coding: utf-8 -*-
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# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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import sys
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from anki.hooks import runHook
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from aqt.qt import *
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from aqt.utils import openLink
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from anki.utils import isMac, isWin, devMode
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# Page for debug messages
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##########################################################################
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class AnkiWebPage(QWebEnginePage):
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def __init__(self, onBridgeCmd):
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QWebEnginePage.__init__(self)
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self._onBridgeCmd = onBridgeCmd
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self._setupBridge()
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self.setBackgroundColor(Qt.transparent)
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def _setupBridge(self):
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class Bridge(QObject):
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@pyqtSlot(str)
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def cmd(self, str):
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self.onCmd(str)
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self._bridge = Bridge()
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self._bridge.onCmd = self._onCmd
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self._channel = QWebChannel(self)
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self._channel.registerObject("py", self._bridge)
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self.setWebChannel(self._channel)
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js = QFile(':/qtwebchannel/qwebchannel.js')
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assert js.open(QIODevice.ReadOnly)
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js = bytes(js.readAll()).decode('utf-8')
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script = QWebEngineScript()
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script.setSourceCode(js + '''
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var pycmd;
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new QWebChannel(qt.webChannelTransport, function(channel) {
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pycmd = channel.objects.py.cmd;
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pycmd("domDone");
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});
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''')
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script.setWorldId(QWebEngineScript.MainWorld)
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script.setInjectionPoint(QWebEngineScript.DocumentReady)
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script.setRunsOnSubFrames(False)
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self.profile().scripts().insert(script)
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def javaScriptConsoleMessage(self, lvl, msg, line, srcID):
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# not translated because console usually not visible,
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# and may only accept ascii text
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sys.stdout.write("JS error on line %(a)d: %(b)s" %
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dict(a=line, b=msg+"\n"))
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def acceptNavigationRequest(self, url, navType, isMainFrame):
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if not isMainFrame:
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return True
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# load all other links in browser
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openLink(url)
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return False
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def _onCmd(self, str):
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from aqt import mw
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mw.progress.timer(1, lambda: self._onBridgeCmd(str), False)
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# Main web view
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##########################################################################
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class AnkiWebView(QWebEngineView):
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def __init__(self, parent=None):
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QWebEngineView.__init__(self, parent=parent)
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self.title = "default"
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self._page = AnkiWebPage(self._onBridgeCmd)
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self._domDone = True
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self.setPage(self._page)
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self._page.profile().setHttpCacheType(QWebEngineProfile.NoCache)
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self.resetHandlers()
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self.allowDrops = False
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QShortcut(QKeySequence("Esc"), self,
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context=Qt.WidgetWithChildrenShortcut, activated=self.onEsc)
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if isMac:
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for key, fn in [
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(QKeySequence.Copy, self.onCopy),
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(QKeySequence.Paste, self.onPaste),
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(QKeySequence.Cut, self.onCut),
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(QKeySequence.SelectAll, self.onSelectAll),
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]:
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QShortcut(key, self,
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context=Qt.WidgetWithChildrenShortcut,
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activated=fn)
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self.focusProxy().installEventFilter(self)
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def eventFilter(self, obj, evt):
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# disable pinch to zoom gesture
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if isinstance(evt, QNativeGestureEvent):
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return True
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return False
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def onEsc(self):
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w = self.parent()
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while w:
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if isinstance(w, QDialog) or isinstance(w, QMainWindow):
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from aqt import mw
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# esc in a child window closes the window
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if w != mw:
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w.close()
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else:
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# in the main window, removes focus from type in area
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self.parent().setFocus()
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break
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w = w.parent()
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def onCopy(self):
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self.triggerPageAction(QWebEnginePage.Copy)
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def onCut(self):
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self.triggerPageAction(QWebEnginePage.Cut)
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def onPaste(self):
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self.triggerPageAction(QWebEnginePage.Paste)
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def onSelectAll(self):
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self.triggerPageAction(QWebEnginePage.SelectAll)
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def contextMenuEvent(self, evt):
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m = QMenu(self)
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a = m.addAction(_("Copy"))
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a.triggered.connect(self.onCopy)
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runHook("AnkiWebView.contextMenuEvent", self, m)
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m.popup(QCursor.pos())
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def dropEvent(self, evt):
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pass
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def setHtml(self, html):
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if not self._domDone:
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if devMode:
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import traceback
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print("ignoring setHtml() called before DOM ready")
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print("caller was", traceback.format_stack()[-3])
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return
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app = QApplication.instance()
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oldFocus = app.focusWidget()
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self._domDone = False
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self._pendingJS = []
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self._page.setHtml(html)
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# work around webengine stealing focus on setHtml()
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if oldFocus:
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oldFocus.setFocus()
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def zoomFactor(self):
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screen = QApplication.desktop().screen()
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dpi = screen.logicalDpiX()
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return max(1, dpi / 96.0)
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def stdHtml(self, body, css="", bodyClass="", js=["jquery.js"], head=""):
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if isWin:
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buttonspec = "button { font-size: 12px; font-family:'Segoe UI'; }"
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fontspec = 'font-size:12px;font-family:"Segoe UI";'
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elif isMac:
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family="Helvetica"
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fontspec = 'font-size:15px;font-family:"%s";'% \
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family
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buttonspec = """
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button { font-size: 13px; -webkit-appearance: none; background: #fff; border: 1px solid #ccc;
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border-radius:5px; font-family: Helvetica }"""
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else:
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buttonspec = ""
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family = self.font().family()
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fontspec = 'font-size:14px;font-family:%s;'%\
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family
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jstxt = "\n".join([self.bundledScript("webview.js")]+
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[self.bundledScript(fname) for fname in js])
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html="""
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<!doctype html>
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<html><head><title>%s</title><style>
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body { zoom: %f; %s }
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%s
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%s</style>
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%s
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%s
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</head>
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<body class="%s">%s</body></html>""" % (
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self.title,
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self.zoomFactor(),
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fontspec,
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buttonspec,
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css, jstxt,
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head, bodyClass, body)
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#print(html)
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self.setHtml(html)
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def webBundlePath(self, path):
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from aqt import mw
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return "http://localhost:%d/_anki/%s" % (mw.mediaServer.port, path)
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def bundledScript(self, fname):
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return '<script src="%s"></script>' % self.webBundlePath(fname)
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def bundledCSS(self, fname):
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return '<link rel="stylesheet" type="text/css" href="%s">' % self.webBundlePath(fname)
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def eval(self, js):
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self.evalWithCallback(js, None)
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def evalWithCallback(self, js, cb):
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if self._domDone:
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if cb:
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self.page().runJavaScript(js, cb)
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else:
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self.page().runJavaScript(js)
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else:
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self._pendingJS.append([js, cb])
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def _openLinksExternally(self, url):
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openLink(url)
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def _onBridgeCmd(self, cmd):
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if cmd == "domDone":
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self._domDone = True
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# run through any pending js calls
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for js, cb in self._pendingJS:
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self.evalWithCallback(js, cb)
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self._pendingJS = []
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self.onLoadFinished()
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else:
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self.onBridgeCmd(cmd)
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def defaultOnBridgeCmd(self, cmd):
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print("unhandled bridge cmd:", cmd)
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def defaultOnLoadFinished(self):
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pass
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def resetHandlers(self):
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self.onBridgeCmd = self.defaultOnBridgeCmd
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self.onLoadFinished = self.defaultOnLoadFinished
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def adjustHeightToFit(self):
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self.evalWithCallback("$(document.body).height()", self._onHeight)
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def _onHeight(self, qvar):
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height = int(qvar*self.zoomFactor())
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self.setFixedHeight(height)
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