556 lines
19 KiB
Python
556 lines
19 KiB
Python
# Copyright: Ankitects Pty Ltd and contributors
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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 dataclasses
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import json
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import math
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import re
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import sys
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from typing import Any, Callable, List, Optional, Sequence, Tuple
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from anki.lang import _
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from anki.utils import isLin, isMac, isWin
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from aqt import gui_hooks
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from aqt.qt import *
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from aqt.theme import theme_manager
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from aqt.utils import openLink
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serverbaseurl = re.compile(r"^.+:\/\/[^\/]+")
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# Page for debug messages
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##########################################################################
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class AnkiWebPage(QWebEnginePage): # type: ignore
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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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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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qwebchannel = ":/qtwebchannel/qwebchannel.js"
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jsfile = QFile(qwebchannel)
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if not jsfile.open(QIODevice.ReadOnly):
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print(f"Error opening '{qwebchannel}': {jsfile.error()}", file=sys.stderr)
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jstext = bytes(jsfile.readAll()).decode("utf-8")
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jsfile.close()
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script = QWebEngineScript()
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script.setSourceCode(
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jstext
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+ """
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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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)
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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, level, 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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if srcID.startswith("data"):
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srcID = ""
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else:
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srcID = serverbaseurl.sub("", srcID[:80], 1)
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if level == QWebEnginePage.InfoMessageLevel:
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level = "info"
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elif level == QWebEnginePage.WarningMessageLevel:
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level = "warning"
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elif level == QWebEnginePage.ErrorMessageLevel:
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level = "error"
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buf = "JS %(t)s %(f)s:%(a)d %(b)s" % dict(
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t=level, a=line, f=srcID, b=msg + "\n"
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)
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# ensure we don't try to write characters the terminal can't handle
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buf = buf.encode(sys.stdout.encoding, "backslashreplace").decode(
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sys.stdout.encoding
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)
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# output to stdout because it may raise error messages on the anki GUI
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# https://github.com/ankitects/anki/pull/560
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sys.stdout.write(buf)
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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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print("onclick handler needs to return false")
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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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# Add-ons
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##########################################################################
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@dataclasses.dataclass
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class WebContent:
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"""Stores all dynamically modified content that a particular web view
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will be populated with.
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Attributes:
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body {str} -- HTML body
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head {str} -- HTML head
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css {List[str]} -- List of media server subpaths,
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each pointing to a CSS file
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js {List[str]} -- List of media server subpaths,
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each pointing to a JS file
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Important Notes:
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- When modifying the attributes specified above, please make sure your
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changes only perform the minimum requried edits to make your add-on work.
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You should avoid overwriting or interfering with existing data as much
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as possible, instead opting to append your own changes, e.g.:
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def on_webview_will_set_content(web_content: WebContent, context):
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web_content.body += "<my_html>"
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web_content.head += "<my_head>"
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- The paths specified in `css` and `js` need to be accessible by Anki's
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media server. All list members without a specified subpath are assumed
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to be located under `/_anki`, which is the media server subpath used
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for all web assets shipped with Anki.
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Add-ons may expose their own web assets by utilizing
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aqt.addons.AddonManager.setWebExports(). Web exports registered
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in this manner may then be accessed under the `/_addons` subpath.
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E.g., to allow access to a `my-addon.js` and `my-addon.css` residing
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in a "web" subfolder in your add-on package, first register the
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corresponding web export:
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> from aqt import mw
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> mw.addonManager.setWebExports(__name__, r"web/.*(css|js)")
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Then append the subpaths to the corresponding web_content fields
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within a function subscribing to gui_hooks.webview_will_set_content:
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def on_webview_will_set_content(web_content: WebContent, context):
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addon_package = mw.addonManager.addonFromModule(__name__)
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web_content.css.append(
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f"/_addons/{addon_package}/web/my-addon.css")
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web_content.js.append(
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f"/_addons/{addon_package}/web/my-addon.js")
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Note that '/' will also match the os specific path separator.
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"""
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body: str = ""
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head: str = ""
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css: List[str] = dataclasses.field(default_factory=lambda: [])
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js: List[str] = dataclasses.field(default_factory=lambda: [])
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# Main web view
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##########################################################################
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class AnkiWebView(QWebEngineView): # type: ignore
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def __init__(
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self, parent: Optional[QWidget] = None, title: str = "default"
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) -> None:
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QWebEngineView.__init__(self, parent=parent) # type: ignore
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self.title = title
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self._page = AnkiWebPage(self._onBridgeCmd)
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self._page.setBackgroundColor(self._getWindowColor()) # reduce flicker
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# in new code, use .set_bridge_command() instead of setting this directly
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self.onBridgeCmd: Callable[[str], Any] = self.defaultOnBridgeCmd
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self._domDone = True
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self._pendingActions: List[Tuple[str, Sequence[Any]]] = []
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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) # type: ignore
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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( # type: ignore
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QKeySequence("Esc"),
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self,
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context=Qt.WidgetWithChildrenShortcut,
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activated=self.onEsc,
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)
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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( # type: ignore
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key, self, context=Qt.WidgetWithChildrenShortcut, activated=fn
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)
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QShortcut( # type: ignore
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QKeySequence("ctrl+shift+v"),
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self,
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context=Qt.WidgetWithChildrenShortcut,
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activated=self.onPaste,
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)
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def eventFilter(self, obj: QObject, evt: QEvent) -> bool:
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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) -> None:
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m = QMenu(self)
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a = m.addAction(_("Copy"))
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qconnect(a.triggered, self.onCopy)
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gui_hooks.webview_will_show_context_menu(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: str) -> None:
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# discard any previous pending actions
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self._pendingActions = []
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self._domDone = True
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self._queueAction("setHtml", html)
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def _setHtml(self, html: str) -> None:
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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) -> float:
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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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if qtminor >= 14:
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return 1
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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) -> int:
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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 _getWindowColor(self):
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if theme_manager.night_mode:
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return theme_manager.qcolor("window-bg")
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if isMac:
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# standard palette does not return correct window color on macOS
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return QColor("#ececec")
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return self.style().standardPalette().color(QPalette.Window)
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def stdHtml(
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self,
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body: str,
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css: Optional[List[str]] = None,
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js: Optional[List[str]] = None,
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head: str = "",
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context: Optional[Any] = None,
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):
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web_content = WebContent(
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body=body,
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head=head,
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js=["webview.js"] + (["jquery.js"] if js is None else js),
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css=["webview.css"] + ([] if css is None else css),
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)
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gui_hooks.webview_will_set_content(web_content, context)
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palette = self.style().standardPalette()
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color_hl = palette.color(QPalette.Highlight).name()
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if isWin:
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# T: include a font for your language on Windows, eg: "Segoe UI", "MS Mincho"
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family = _('"Segoe UI"')
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widgetspec = "button { font-family:%s; }" % family
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widgetspec += "\n:focus { outline: 1px solid %s; }" % color_hl
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fontspec = "font-size:12px;font-family:%s;" % family
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elif isMac:
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family = "Helvetica"
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fontspec = 'font-size:15px;font-family:"%s";' % family
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widgetspec = """
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button { -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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family = self.font().family()
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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{
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background-color: %(color_btn)s;
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font-family:"%(family)s"; }
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button:focus{ border-color: %(color_hl)s }
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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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}""" % {
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"family": family,
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"color_btn": color_btn,
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"color_hl": color_hl,
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"color_hl_txt": color_hl_txt,
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}
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csstxt = "\n".join(self.bundledCSS(fname) for fname in web_content.css)
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jstxt = "\n".join(self.bundledScript(fname) for fname in web_content.js)
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from aqt import mw
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head = mw.baseHTML() + csstxt + jstxt + web_content.head
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body_class = theme_manager.body_class()
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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: {}; background: {}; {} }}
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{}
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</style>
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{}
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</head>
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<body class="{}">{}</body>
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</html>""".format(
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self.title,
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self.zoomFactor(),
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self._getWindowColor().name(),
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fontspec,
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widgetspec,
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head,
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body_class,
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web_content.body,
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)
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# print(html)
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self.setHtml(html)
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@classmethod
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def webBundlePath(cls, path: str) -> str:
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from aqt import mw
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if path.startswith("/"):
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subpath = ""
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else:
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subpath = "/_anki/"
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return f"http://127.0.0.1:{mw.mediaServer.getPort()}{subpath}{path}"
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def bundledScript(self, fname: str) -> str:
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return '<script src="%s"></script>' % self.webBundlePath(fname)
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def bundledCSS(self, fname: str) -> str:
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return '<link rel="stylesheet" type="text/css" href="%s">' % self.webBundlePath(
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fname
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)
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def eval(self, js: str) -> None:
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self.evalWithCallback(js, None)
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def evalWithCallback(self, js: str, cb: Callable) -> None:
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self._queueAction("eval", js, cb)
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def _evalWithCallback(self, js: str, cb: Callable[[Any], Any]) -> None:
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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: str, *args: Any) -> None:
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self._pendingActions.append((name, args))
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self._maybeRunActions()
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def _maybeRunActions(self) -> None:
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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: str) -> None:
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openLink(url)
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def _shouldIgnoreWebEvent(self) -> bool:
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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: str) -> Any:
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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 not self._filterSet:
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self.focusProxy().installEventFilter(self)
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self._filterSet = True
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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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handled, result = gui_hooks.webview_did_receive_js_message(
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(False, None), cmd, self._bridge_context
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)
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if handled:
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return result
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else:
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return self.onBridgeCmd(cmd)
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def defaultOnBridgeCmd(self, cmd: str) -> None:
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print("unhandled bridge cmd:", cmd)
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# legacy
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def resetHandlers(self) -> None:
|
|
self.onBridgeCmd = self.defaultOnBridgeCmd
|
|
self._bridge_context = None
|
|
|
|
def adjustHeightToFit(self) -> None:
|
|
self.evalWithCallback("$(document.body).height()", self._onHeight)
|
|
|
|
def _onHeight(self, qvar: Optional[int]) -> None:
|
|
from aqt import mw
|
|
|
|
if qvar is None:
|
|
|
|
mw.progress.timer(1000, mw.reset, False)
|
|
return
|
|
|
|
scaleFactor = self.zoomFactor()
|
|
if scaleFactor == 1:
|
|
scaleFactor = mw.pm.uiScale()
|
|
|
|
height = math.ceil(qvar * scaleFactor)
|
|
self.setFixedHeight(height)
|
|
|
|
def set_bridge_command(self, func: Callable[[str], Any], context: Any) -> None:
|
|
"""Set a handler for pycmd() messages received from Javascript.
|
|
|
|
Context is the object calling this routine, eg an instance of
|
|
aqt.reviewer.Reviewer or aqt.deckbrowser.DeckBrowser."""
|
|
self.onBridgeCmd = func
|
|
self._bridge_context = context
|