anki/qt/aqt/previewer.py

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# Copyright: Ankitects Pty Ltd and contributors
# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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# mypy: check-untyped-defs
import json
import re
import time
from typing import Any, Callable, Optional, Union
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from anki.cards import Card
from anki.lang import _
from aqt import AnkiQt, gui_hooks
from aqt.qt import (
QAbstractItemView,
QCheckBox,
QDialog,
QDialogButtonBox,
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QIcon,
QKeySequence,
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QPixmap,
Qt,
QVBoxLayout,
QWidget,
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qconnect,
)
from aqt.reviewer import replay_audio
from aqt.sound import av_player, play_clicked_audio
from aqt.theme import theme_manager
from aqt.utils import TR, restoreGeom, saveGeom, tr
from aqt.webview import AnkiWebView
class Previewer(QDialog):
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_last_state = None
_card_changed = False
_last_render: Union[int, float] = 0
_timer = None
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_show_both_sides = False
def __init__(self, parent: QWidget, mw: AnkiQt, on_close: Callable[[], None]):
super().__init__(None, Qt.Window)
self._open = True
self._parent = parent
self._close_callback = on_close
self.mw = mw
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icon = QIcon()
icon.addPixmap(QPixmap(":/icons/anki.png"), QIcon.Normal, QIcon.Off)
self.setWindowIcon(icon)
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def card(self) -> Optional[Card]:
raise NotImplementedError
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def card_changed(self) -> bool:
raise NotImplementedError
def open(self):
self._state = "question"
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self._last_state = None
self._create_gui()
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self._setup_web_view()
self.render_card()
self.show()
def _create_gui(self):
self.setWindowTitle(tr(TR.ACTIONS_PREVIEW))
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qconnect(self.finished, self._on_finished)
self.silentlyClose = True
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self.vbox = QVBoxLayout()
self.vbox.setContentsMargins(0, 0, 0, 0)
self._web = AnkiWebView(title="previewer")
self.vbox.addWidget(self._web)
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self.bbox = QDialogButtonBox()
self._replay = self.bbox.addButton(
tr(TR.ACTIONS_REPLAY_AUDIO), QDialogButtonBox.ActionRole
)
self._replay.setAutoDefault(False)
self._replay.setShortcut(QKeySequence("R"))
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self._replay.setToolTip(tr(TR.ACTIONS_SHORTCUT_KEY, val="R"))
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qconnect(self._replay.clicked, self._on_replay_audio)
both_sides_button = QCheckBox(tr(TR.QT_MISC_BACK_SIDE_ONLY))
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both_sides_button.setShortcut(QKeySequence("B"))
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both_sides_button.setToolTip(tr(TR.ACTIONS_SHORTCUT_KEY, val="B"))
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self.bbox.addButton(both_sides_button, QDialogButtonBox.ActionRole)
self._show_both_sides = self.mw.col.conf.get("previewBothSides", False)
both_sides_button.setChecked(self._show_both_sides)
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qconnect(both_sides_button.toggled, self._on_show_both_sides)
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self.vbox.addWidget(self.bbox)
self.setLayout(self.vbox)
restoreGeom(self, "preview")
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def _on_finished(self, ok):
saveGeom(self, "preview")
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self.mw.progress.timer(100, self._on_close, False)
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def _on_replay_audio(self):
if self._state == "question":
replay_audio(self.card(), True)
elif self._state == "answer":
replay_audio(self.card(), False)
def close(self):
self._on_close()
super().close()
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def _on_close(self):
self._open = False
self._close_callback()
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def _setup_web_view(self):
jsinc = [
"js/vendor/jquery.js",
"js/vendor/browsersel.js",
"js/mathjax.js",
"js/vendor/mathjax/tex-chtml.js",
"js/reviewer.js",
]
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self._web.stdHtml(
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self.mw.reviewer.revHtml(),
css=["css/reviewer.css"],
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js=jsinc,
context=self,
)
self._web.set_bridge_command(self._on_bridge_cmd, self)
def _on_bridge_cmd(self, cmd: str) -> Any:
if cmd.startswith("play:"):
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play_clicked_audio(cmd, self.card())
def render_card(self):
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self.cancel_timer()
# Keep track of whether render() has ever been called
# with cardChanged=True since the last successful render
self._card_changed |= self.card_changed()
# avoid rendering in quick succession
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elap_ms = int((time.time() - self._last_render) * 1000)
delay = 300
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if elap_ms < delay:
self._timer = self.mw.progress.timer(
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delay - elap_ms, self._render_scheduled, False
)
else:
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self._render_scheduled()
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def cancel_timer(self):
if self._timer:
self._timer.stop()
self._timer = None
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def _render_scheduled(self) -> None:
self.cancel_timer()
self._last_render = time.time()
if not self._open:
return
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c = self.card()
func = "_showQuestion"
if not c:
txt = tr(TR.QT_MISC_PLEASE_SELECT_1_CARD)
bodyclass = ""
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self._last_state = None
else:
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if self._show_both_sides:
self._state = "answer"
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elif self._card_changed:
self._state = "question"
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currentState = self._state_and_mod()
if currentState == self._last_state:
# nothing has changed, avoid refreshing
return
# need to force reload even if answer
txt = c.q(reload=True)
if self._state == "answer":
func = "_showAnswer"
txt = c.a()
txt = re.sub(r"\[\[type:[^]]+\]\]", "", txt)
bodyclass = theme_manager.body_classes_for_card_ord(c.ord)
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if c.autoplay():
AnkiWebView.setPlaybackRequiresGesture(False)
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if self._show_both_sides:
# if we're showing both sides at once, remove any audio
# from the answer that's appeared on the question already
question_audio = c.question_av_tags()
only_on_answer_audio = [
x for x in c.answer_av_tags() if x not in question_audio
]
audio = question_audio + only_on_answer_audio
elif self._state == "question":
audio = c.question_av_tags()
else:
audio = c.answer_av_tags()
av_player.play_tags(audio)
else:
AnkiWebView.setPlaybackRequiresGesture(True)
av_player.clear_queue_and_maybe_interrupt()
txt = self.mw.prepare_card_text_for_display(txt)
txt = gui_hooks.card_will_show(txt, c, "preview" + self._state.capitalize())
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self._last_state = self._state_and_mod()
self._web.eval("{}({},'{}');".format(func, json.dumps(txt), bodyclass))
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self._card_changed = False
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def _on_show_both_sides(self, toggle):
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self._show_both_sides = toggle
self.mw.col.conf["previewBothSides"] = toggle
self.mw.col.setMod()
if self._state == "answer" and not toggle:
self._state = "question"
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self.render_card()
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def _state_and_mod(self):
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c = self.card()
n = c.note()
n.load()
return (self._state, c.id, n.mod)
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def state(self) -> str:
return self._state
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class MultiCardPreviewer(Previewer):
def card(self) -> Optional[Card]:
# need to state explicitly it's not implement to avoid W0223
raise NotImplementedError
def card_changed(self) -> bool:
# need to state explicitly it's not implement to avoid W0223
raise NotImplementedError
def _create_gui(self):
super()._create_gui()
self._prev = self.bbox.addButton("<", QDialogButtonBox.ActionRole)
self._prev.setAutoDefault(False)
self._prev.setShortcut(QKeySequence("Left"))
self._prev.setToolTip(tr(TR.QT_MISC_SHORTCUT_KEY_LEFT_ARROW))
self._next = self.bbox.addButton(">", QDialogButtonBox.ActionRole)
self._next.setAutoDefault(True)
self._next.setShortcut(QKeySequence("Right"))
self._next.setToolTip(tr(TR.QT_MISC_SHORTCUT_KEY_RIGHT_ARROW_OR_ENTER))
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qconnect(self._prev.clicked, self._on_prev)
qconnect(self._next.clicked, self._on_next)
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def _on_prev(self):
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if self._state == "answer" and not self._show_both_sides:
self._state = "question"
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self.render_card()
else:
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self._on_prev_card()
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def _on_prev_card(self):
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pass
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def _on_next(self):
if self._state == "question":
self._state = "answer"
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self.render_card()
else:
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self._on_next_card()
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def _on_next_card(self):
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pass
def _updateButtons(self):
if not self._open:
return
self._prev.setEnabled(self._should_enable_prev())
self._next.setEnabled(self._should_enable_next())
def _should_enable_prev(self):
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return self._state == "answer" and not self._show_both_sides
def _should_enable_next(self):
return self._state == "question"
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def _on_close(self):
super()._on_close()
self._prev = None
self._next = None
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class BrowserPreviewer(MultiCardPreviewer):
_last_card_id = 0
def card(self) -> Optional[Card]:
if self._parent.singleCard:
return self._parent.card
else:
return None
def card_changed(self) -> bool:
c = self.card()
if not c:
return True
else:
changed = c.id != self._last_card_id
self._last_card_id = c.id
return changed
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def _on_finished(self, ok):
super()._on_finished(ok)
self._parent.form.previewButton.setChecked(False)
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def _on_prev_card(self):
self._parent.editor.saveNow(
lambda: self._parent._moveCur(QAbstractItemView.MoveUp)
)
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def _on_next_card(self):
self._parent.editor.saveNow(
lambda: self._parent._moveCur(QAbstractItemView.MoveDown)
)
def _should_enable_prev(self):
return super()._should_enable_prev() or self._parent.currentRow() > 0
def _should_enable_next(self):
return (
super()._should_enable_next()
or self._parent.currentRow() < self._parent.model.rowCount(None) - 1
)
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def _render_scheduled(self) -> None:
super()._render_scheduled()
self._updateButtons()