anki/qt/aqt/theme.py
Matthias Metelka b97fabb677
Make Qt stylesheets fully responsive to RTL (#2114)
* Make Qt stylesheets fully responsive to RTL

* Fix typing
2022-10-10 13:29:09 +10:00

430 lines
13 KiB
Python

# 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 os
import platform
import re
import subprocess
from dataclasses import dataclass
from typing import Callable, List, Tuple
import anki.lang
import aqt
from anki.lang import is_rtl
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
def rtl(self) -> bool:
return is_rtl(anki.lang.current_lang)
def left(self) -> str:
return "right" if self.rtl() else "left"
def right(self) -> str:
return "left" if self.rtl() else "right"
# 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."
if not is_mac:
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)
return self._dark_mode_available
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 themed_icon(self, path: str) -> str:
"Fetch themed version of svg."
from aqt.utils import aqt_data_folder
if m := re.match(r"(?:mdi:)(.+)$", path):
name = m.group(1)
else:
return path
filename = f"{name}-{'dark' if self.night_mode else 'light'}.svg"
return (
os.path.join(aqt_data_folder(), "qt", "icons", filename)
.replace("\\\\?\\", "")
.replace("\\", "/")
)
def icon_from_resources(self, path: str | ColoredIcon) -> QIcon:
"Fetch icon from Qt resources."
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
if "mdi:" in path:
icon = QIcon(self.themed_icon(path))
else:
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/global settings."
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")
if aqt.mw.pm.reduced_motion():
classes.append("reduced-motion")
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 var(self, vars: tuple[str, str]) -> str:
"""Given day/night colors/props, return the correct one for the current theme."""
idx = 1 if self.night_mode else 0
return vars[idx]
def qcolor(self, colors: tuple[str, str]) -> QColor:
return QColor(self.var(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:
from aqt.stylesheets import splitter_styles
buf = splitter_styles(self)
if not is_mac:
from aqt.stylesheets import (
button_styles,
checkbox_styles,
combobox_styles,
general_styles,
scrollbar_styles,
spinbox_styles,
table_styles,
tabwidget_styles,
win10_styles,
)
buf += "".join(
[
general_styles(self),
button_styles(self),
combobox_styles(self),
tabwidget_styles(self),
table_styles(self),
spinbox_styles(self),
checkbox_styles(self),
scrollbar_styles(self),
]
)
if is_win and platform.release() == "10":
buf += win10_styles(self)
# 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
self.default_palette.setColor(
QPalette.ColorRole.Window, self.qcolor(colors.CANVAS)
)
app.setPalette(self.default_palette)
return
if not self.macos_dark_mode():
app.setStyle(QStyleFactory.create("fusion")) # type: ignore
palette = QPalette()
text = self.qcolor(colors.FG)
palette.setColor(QPalette.ColorRole.WindowText, text)
palette.setColor(QPalette.ColorRole.ToolTipText, text)
palette.setColor(QPalette.ColorRole.Text, text)
palette.setColor(QPalette.ColorRole.ButtonText, text)
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)
canvas = self.qcolor(colors.CANVAS)
palette.setColor(QPalette.ColorRole.Window, canvas)
palette.setColor(QPalette.ColorRole.AlternateBase, canvas)
palette.setColor(QPalette.ColorRole.Button, QColor("#454545"))
canvas_inset = self.qcolor(colors.CANVAS_INSET)
palette.setColor(QPalette.ColorRole.Base, canvas_inset)
palette.setColor(QPalette.ColorRole.ToolTipBase, canvas_inset)
palette.setColor(
QPalette.ColorRole.PlaceholderText, self.qcolor(colors.FG_SUBTLE)
)
disabled_color = self.qcolor(colors.FG_DISABLED)
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.ACCENT_LINK))
palette.setColor(QPalette.ColorRole.BrightText, Qt.GlobalColor.red)
app.setPalette(palette)
def _update_stat_colors(self) -> None:
import anki.stats as s
s.colLearn = self.var(colors.STATE_NEW)
s.colRelearn = self.var(colors.STATE_LEARN)
s.colCram = self.var(colors.STATE_SUSPENDED)
s.colSusp = self.var(colors.STATE_SUSPENDED)
s.colMature = self.var(colors.STATE_REVIEW)
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,
)
try:
key = OpenKey(
HKEY_CURRENT_USER,
r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize",
)
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()