anki/qt/aqt/theme.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
from __future__ import annotations
import enum
import platform
import subprocess
from dataclasses import dataclass
from typing import Callable, List, Tuple
import aqt
from anki.utils import is_lin, is_mac, is_win
from aqt import QApplication, colors, gui_hooks
from aqt.qt import (
QColor,
QGuiApplication,
QIcon,
QPainter,
QPalette,
QPixmap,
QStyleFactory,
Qt,
)
@dataclass
class ColoredIcon:
path: str
# (day, night)
color: tuple[str, str]
def current_color(self, night_mode: bool) -> str:
if night_mode:
return self.color[1]
else:
return self.color[0]
def with_color(self, color: tuple[str, str]) -> ColoredIcon:
return ColoredIcon(path=self.path, color=color)
class Theme(enum.IntEnum):
FOLLOW_SYSTEM = 0
LIGHT = 1
DARK = 2
class ThemeManager:
_night_mode_preference = False
_icon_cache_light: dict[str, QIcon] = {}
_icon_cache_dark: dict[str, QIcon] = {}
_icon_size = 128
_dark_mode_available: bool | None = None
default_palette: QPalette | None = None
_default_style: str | None = None
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# Qt applies a gradient to the buttons in dark mode
# from about #505050 to #606060.
DARK_MODE_BUTTON_BG_MIDPOINT = "#555555"
def macos_dark_mode(self) -> bool:
"True if the user has night mode on, and has forced native widgets."
if not is_mac:
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return False
if not self._night_mode_preference:
return False
if self._dark_mode_available is None:
self._dark_mode_available = set_macos_dark_mode(True)
from aqt import mw
return self._dark_mode_available and mw.pm.dark_mode_widgets()
def get_night_mode(self) -> bool:
return self._night_mode_preference
def set_night_mode(self, val: bool) -> None:
self._night_mode_preference = val
self._update_stat_colors()
night_mode = property(get_night_mode, set_night_mode)
def icon_from_resources(self, path: str | ColoredIcon) -> QIcon:
"Fetch icon from Qt resources, and invert if in night mode."
if self.night_mode:
cache = self._icon_cache_light
else:
cache = self._icon_cache_dark
if isinstance(path, str):
key = path
else:
key = f"{path.path}-{path.color}"
icon = cache.get(key)
if icon:
return icon
if isinstance(path, str):
# default black/white
icon = QIcon(path)
if self.night_mode:
img = icon.pixmap(self._icon_size, self._icon_size).toImage()
img.invertPixels()
icon = QIcon(QPixmap(img))
else:
# specified colours
icon = QIcon(path.path)
pixmap = icon.pixmap(16)
painter = QPainter(pixmap)
painter.setCompositionMode(
QPainter.CompositionMode.CompositionMode_SourceIn
)
painter.fillRect(pixmap.rect(), QColor(path.current_color(self.night_mode)))
painter.end()
icon = QIcon(pixmap)
return icon
return cache.setdefault(path, icon)
def body_class(self, night_mode: bool | None = None) -> str:
"Returns space-separated class list for platform/theme."
classes = []
if is_win:
classes.append("isWin")
elif is_mac:
classes.append("isMac")
else:
classes.append("isLin")
if night_mode is None:
night_mode = self.night_mode
if night_mode:
classes.extend(["nightMode", "night_mode"])
if self.macos_dark_mode():
classes.append("macos-dark-mode")
return " ".join(classes)
def body_classes_for_card_ord(
self, card_ord: int, night_mode: bool | None = None
) -> str:
"Returns body classes used when showing a card."
return f"card card{card_ord+1} {self.body_class(night_mode)}"
def color(self, colors: tuple[str, str]) -> str:
"""Given day/night colors, return the correct one for the current theme."""
idx = 1 if self.night_mode else 0
return colors[idx]
def qcolor(self, colors: tuple[str, str]) -> QColor:
return QColor(self.color(colors))
def _determine_night_mode(self) -> bool:
theme = aqt.mw.pm.theme()
if theme == Theme.LIGHT:
return False
elif theme == Theme.DARK:
return True
else:
if is_win:
return get_windows_dark_mode()
elif is_mac:
return get_macos_dark_mode()
else:
return get_linux_dark_mode()
def apply_style_if_system_style_changed(self) -> None:
theme = aqt.mw.pm.theme()
if theme != Theme.FOLLOW_SYSTEM:
return
if self._determine_night_mode() != self.night_mode:
self.apply_style()
def apply_style(self) -> None:
"Apply currently configured style."
app = aqt.mw.app
self.night_mode = self._determine_night_mode()
if not self.default_palette:
self.default_palette = QGuiApplication.palette()
self._default_style = app.style().objectName()
self._apply_palette(app)
self._apply_style(app)
gui_hooks.theme_did_change()
def _apply_style(self, app: QApplication) -> None:
buf = ""
if is_win and platform.release() == "10":
# day mode is missing a bottom border; background must be
# also set for border to apply
buf += f"""
QMenuBar {{
border-bottom: 1px solid {self.color(colors.BORDER)};
background: {self.color(colors.WINDOW_BG) if self.night_mode else "white"};
}}
"""
# qt bug? setting the above changes the browser sidebar
# to white as well, so set it back
buf += f"""
QTreeWidget {{
background: {self.color(colors.WINDOW_BG)};
}}
"""
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if self.night_mode:
buf += """
QToolTip {
border: 0;
}
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"""
if not self.macos_dark_mode():
buf += """
QScrollBar {{ background-color: {}; }}
QScrollBar::handle {{ background-color: {}; border-radius: 5px; }}
QScrollBar:horizontal {{ height: 12px; }}
QScrollBar::handle:horizontal {{ min-width: 50px; }}
QScrollBar:vertical {{ width: 12px; }}
QScrollBar::handle:vertical {{ min-height: 50px; }}
QScrollBar::add-line {{
border: none;
background: none;
}}
QScrollBar::sub-line {{
border: none;
background: none;
}}
QTabWidget {{ background-color: {}; }}
""".format(
self.color(colors.WINDOW_BG),
# fushion-button-hover-bg
"#656565",
self.color(colors.WINDOW_BG),
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)
# allow addons to modify the styling
buf = gui_hooks.style_did_init(buf)
app.setStyleSheet(buf)
def _apply_palette(self, app: QApplication) -> None:
set_macos_dark_mode(self.night_mode)
if not self.night_mode:
app.setStyle(QStyleFactory.create(self._default_style)) # type: ignore
app.setPalette(self.default_palette)
return
if not self.macos_dark_mode():
app.setStyle(QStyleFactory.create("fusion")) # type: ignore
palette = QPalette()
text_fg = self.qcolor(colors.TEXT_FG)
palette.setColor(QPalette.ColorRole.WindowText, text_fg)
palette.setColor(QPalette.ColorRole.ToolTipText, text_fg)
palette.setColor(QPalette.ColorRole.Text, text_fg)
palette.setColor(QPalette.ColorRole.ButtonText, text_fg)
hlbg = self.qcolor(colors.HIGHLIGHT_BG)
hlbg.setAlpha(64)
palette.setColor(
QPalette.ColorRole.HighlightedText, self.qcolor(colors.HIGHLIGHT_FG)
)
palette.setColor(QPalette.ColorRole.Highlight, hlbg)
window_bg = self.qcolor(colors.WINDOW_BG)
palette.setColor(QPalette.ColorRole.Window, window_bg)
palette.setColor(QPalette.ColorRole.AlternateBase, window_bg)
palette.setColor(QPalette.ColorRole.Button, QColor("#454545"))
frame_bg = self.qcolor(colors.FRAME_BG)
palette.setColor(QPalette.ColorRole.Base, frame_bg)
palette.setColor(QPalette.ColorRole.ToolTipBase, frame_bg)
disabled_color = self.qcolor(colors.DISABLED)
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palette.setColor(QPalette.ColorRole.PlaceholderText, disabled_color)
palette.setColor(
QPalette.ColorGroup.Disabled, QPalette.ColorRole.Text, disabled_color
)
palette.setColor(
QPalette.ColorGroup.Disabled, QPalette.ColorRole.ButtonText, disabled_color
)
palette.setColor(
QPalette.ColorGroup.Disabled,
QPalette.ColorRole.HighlightedText,
disabled_color,
)
palette.setColor(QPalette.ColorRole.Link, self.qcolor(colors.LINK))
palette.setColor(QPalette.ColorRole.BrightText, Qt.GlobalColor.red)
app.setPalette(palette)
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def _update_stat_colors(self) -> None:
import anki.stats as s
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s.colLearn = self.color(colors.NEW_COUNT)
s.colRelearn = self.color(colors.LEARN_COUNT)
s.colCram = self.color(colors.SUSPENDED_BG)
s.colSusp = self.color(colors.SUSPENDED_BG)
s.colMature = self.color(colors.REVIEW_COUNT)
s._legacy_nightmode = self._night_mode_preference
def get_windows_dark_mode() -> bool:
"True if Windows system is currently in dark mode."
if not is_win:
return False
from winreg import ( # type: ignore[attr-defined] # pylint: disable=import-error
HKEY_CURRENT_USER,
OpenKey,
QueryValueEx,
)
key = OpenKey(
HKEY_CURRENT_USER,
r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize",
)
try:
return not QueryValueEx(key, "AppsUseLightTheme")[0]
except Exception as err:
# key reportedly missing or set to wrong type on some systems
return False
def set_macos_dark_mode(enabled: bool) -> bool:
"True if setting successful."
from aqt._macos_helper import macos_helper
if not macos_helper:
return False
return macos_helper.set_darkmode_enabled(enabled)
def get_macos_dark_mode() -> bool:
"True if macOS system is currently in dark mode."
from aqt._macos_helper import macos_helper
if not macos_helper:
return False
return macos_helper.system_is_dark()
def get_linux_dark_mode() -> bool:
"""True if Linux system is in dark mode.
Only works if D-Bus is installed and system uses org.freedesktop.appearance
color-scheme to indicate dark mode preference OR if GNOME theme has
'-dark' in the name."""
if not is_lin:
return False
def parse_stdout_dbus_send(stdout: str) -> bool:
dbus_response = stdout.split()
if len(dbus_response) != 4:
return False
# https://github.com/flatpak/xdg-desktop-portal/blob/main/data/org.freedesktop.impl.portal.Settings.xml#L40
PREFER_DARK = "1"
return dbus_response[-1] == PREFER_DARK
dark_mode_detection_strategies: List[Tuple[str, Callable[[str], bool]]] = [
(
"dbus-send --session --print-reply=literal --reply-timeout=1000 "
"--dest=org.freedesktop.portal.Desktop /org/freedesktop/portal/desktop "
"org.freedesktop.portal.Settings.Read string:'org.freedesktop.appearance' "
"string:'color-scheme'",
parse_stdout_dbus_send,
),
(
"gsettings get org.gnome.desktop.interface gtk-theme",
lambda stdout: "-dark" in stdout.lower(),
),
]
for cmd, parse_stdout in dark_mode_detection_strategies:
try:
process = subprocess.run(
cmd,
shell=True,
check=True,
capture_output=True,
encoding="utf8",
)
except FileNotFoundError as e:
# detection strategy failed, missing program
print(e)
continue
except subprocess.CalledProcessError as e:
# detection strategy failed, command returned error
print(e)
continue
return parse_stdout(process.stdout)
return False # all dark mode detection strategies failed
theme_manager = ThemeManager()