366 lines
12 KiB
Python
366 lines
12 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 json
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import sys
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import math
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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, showWarning
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from anki.utils import isMac, isWin, isLin, 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, result=str)
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def cmd(self, str):
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return json.dumps(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 = function (arg, cb) {
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var resultCB = function (res) {
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// pass result back to user-provided callback
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if (cb) {
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cb(JSON.parse(res));
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}
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}
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channel.objects.py.cmd(arg, resultCB);
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return false;
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}
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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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# data: links generated by setHtml()
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if url.scheme() == "data":
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return True
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# catch buggy <a href='#' onclick='func()'> links
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from aqt import mw
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if url.matches(QUrl(mw.serverURL()), QUrl.RemoveFragment):
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sys.stderr.write("onclick handler needs to return false\n")
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return False
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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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return self._onBridgeCmd(str)
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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._pendingActions = []
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self.requiresCol = 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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self._filterSet = 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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QShortcut(QKeySequence("ctrl+shift+v"), self,
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context=Qt.WidgetWithChildrenShortcut, activated=self.onPaste)
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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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elif evt.type() == QEvent.MouseButtonRelease:
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if evt.button() == Qt.MidButton and isLin:
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self.onMiddleClickPaste()
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return True
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return False
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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 onMiddleClickPaste(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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self._queueAction("setHtml", html)
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def _setHtml(self, html):
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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._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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# overridden scale factor?
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webscale = os.environ.get("ANKI_WEBSCALE")
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if webscale:
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return float(webscale)
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if isMac:
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return 1
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screen = QApplication.desktop().screen()
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dpi = screen.logicalDpiX()
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factor = dpi / 96.0
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if isLin:
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factor = max(1, factor)
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return factor
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# compensate for qt's integer scaling on windows
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qtIntScale = self._getQtIntScale(screen)
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desiredScale = factor * qtIntScale
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newFactor = desiredScale / qtIntScale
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return max(1, newFactor)
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def _getQtIntScale(self, screen):
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# try to detect if Qt has scaled the screen
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# - qt will round the scale factor to a whole number, so a dpi of 125% = 1x,
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# and a dpi of 150% = 2x
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# - a screen with a normal physical dpi of 72 will have a dpi of 32
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# if the scale factor has been rounded to 2x
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# - different screens have different physical DPIs (eg 72, 93, 102)
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# - until a better solution presents itself, assume a physical DPI at
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# or above 70 is unscaled
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if screen.physicalDpiX() > 70:
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return 1
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elif screen.physicalDpiX() > 35:
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return 2
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else:
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return 3
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def stdHtml(self, body, css=[], js=["jquery.js"], head=""):
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if isWin:
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widgetspec = "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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widgetspec = """
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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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palette = self.style().standardPalette()
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family = self.font().family()
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color_hl = palette.color(QPalette.Highlight).name()
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color_hl_txt = palette.color(QPalette.HighlightedText).name()
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color_btn = palette.color(QPalette.Button).name()
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fontspec = 'font-size:14px;font-family:"%s";'% family
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widgetspec = """
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/* Buttons */
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button{ font-size:14px; -webkit-appearance:none; outline:0;
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background-color: %(color_btn)s; border:1px solid rgba(0,0,0,.2);
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border-radius:2px; height:24px; font-family:"%(family)s"; }
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button:focus{ border-color: %(color_hl)s }
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button:hover{ background-color:#fff }
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button:active, button:active:hover { background-color: %(color_hl)s; color: %(color_hl_txt)s;}
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/* Input field focus outline */
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textarea:focus, input:focus, input[type]:focus, .uneditable-input:focus,
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div[contenteditable="true"]:focus {
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outline: 0 none;
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border-color: %(color_hl)s;
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}""" % {"family": family, "color_btn": color_btn,
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"color_hl": color_hl, "color_hl_txt": color_hl_txt}
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csstxt = "\n".join([self.bundledCSS("webview.css")]+
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[self.bundledCSS(fname) for fname in css])
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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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from aqt import mw
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head = mw.baseHTML() + head + csstxt + jstxt
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html = """
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<!doctype html>
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<html><head>
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<title>{}</title>
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<style>
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body {{ zoom: {}; {} }}
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{}
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</style>
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{}
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</head>
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<body>{}</body>
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</html>""".format(self.title, self.zoomFactor(), fontspec, widgetspec, head, 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://127.0.0.1:%d/_anki/%s" % (mw.mediaServer.getPort(), 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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self._queueAction("eval", js, cb)
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def _evalWithCallback(self, js, cb):
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if cb:
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def handler(val):
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if self._shouldIgnoreWebEvent():
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print("ignored late js callback", cb)
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return
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cb(val)
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self.page().runJavaScript(js, handler)
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else:
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self.page().runJavaScript(js)
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def _queueAction(self, name, *args):
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self._pendingActions.append((name, args))
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self._maybeRunActions()
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def _maybeRunActions(self):
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while self._pendingActions and self._domDone:
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name, args = self._pendingActions.pop(0)
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if name == "eval":
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self._evalWithCallback(*args)
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elif name == "setHtml":
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self._setHtml(*args)
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else:
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raise Exception("unknown action: {}".format(name))
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def _openLinksExternally(self, url):
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openLink(url)
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def _shouldIgnoreWebEvent(self):
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# async web events may be received after the profile has been closed
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# or the underlying webview has been deleted
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from aqt import mw
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if sip.isdeleted(self):
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return True
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if not mw.col and self.requiresCol:
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return True
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return False
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def _onBridgeCmd(self, cmd):
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if not self._filterSet:
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self.focusProxy().installEventFilter(self)
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self._filterSet = True
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if self._shouldIgnoreWebEvent():
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print("ignored late bridge cmd", cmd)
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return
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if cmd == "domDone":
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self._domDone = True
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self._maybeRunActions()
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else:
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return 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 resetHandlers(self):
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self.onBridgeCmd = self.defaultOnBridgeCmd
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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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if qvar is None:
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from aqt import mw
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openLink("https://anki.tenderapp.com/kb/problems/anki-must-be-able-to-connect-to-a-local-port")
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mw.app.closeAllWindows()
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return
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height = math.ceil(qvar*self.zoomFactor())
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self.setFixedHeight(height)
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