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Gradience/gradience/frontend/widgets/shell_theming_group.py

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# shell_theming_group.py
#
# Change the look of Adwaita, with ease
# Copyright (C) 2023, Gradience Team
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from enum import Enum
from subprocess import SubprocessError
from gi.repository import GObject, GLib, Gio, Gtk, Adw
from gradience.backend.utils.gnome import is_gnome_available, is_shell_ext_installed
from gradience.backend.utils.subprocess import GradienceSubprocess
from gradience.backend.constants import rootdir
from gradience.backend.exceptions import UnsupportedShellVersion
from gradience.backend.logger import Logger
from gradience.backend.theming.shell import ShellTheme
from gradience.frontend.schemas.shell_schema import shell_schema
from gradience.frontend.dialogs.unsupported_shell_dialog import GradienceUnsupportedShellDialog
from gradience.frontend.views.shell_prefs_window import GradienceShellPrefsWindow
logging = Logger()
@Gtk.Template(resource_path=f"{rootdir}/ui/shell_theming_group.ui")
class GradienceShellThemingGroup(Adw.PreferencesGroup):
__gtype_name__ = "GradienceShellThemingGroup"
variant_row = Gtk.Template.Child("variant-row")
shell_theming_expander = Gtk.Template.Child("shell-theming-expander")
other_options_row = Gtk.Template.Child("other-options-row")
def __init__(self, parent, **kwargs):
super().__init__(**kwargs)
self.shell_colors = {}
self.parent = parent
self.settings = parent.settings
self.app = parent.get_application()
self.win = self.app.get_active_window()
self.toast_overlay = parent.toast_overlay
self.setup_signals()
self.setup()
def setup_signals(self):
self.app.connect("preset-reload", self.reload_colors)
def setup(self):
self.setup_variant_row()
self.shell_theming_expander.add_row(self.other_options_row)
def setup_variant_row(self):
variant_store = Gtk.StringList()
variant_store.append(_("Dark"))
variant_store.append(_("Light"))
self.variant_row.set_model(variant_store)
# TODO: Maybe allow it when using export option?
'''def setup_version_row(self):
version_store = Gtk.StringList()
version_store.append(_("Auto"))
version_store.append(_("43"))
version_store.append(_("42"))
self.shell_version_row.set_model(version_store)'''
def reload_colors(self, *args):
try:
for variable in shell_schema["variables"]:
self.set_colors(variable)
except Exception as e:
logging.error("An unexpected error occurred while loading variable colors.", exc=e)
self.toast_overlay.add_toast(
Adw.Toast(
title=_("An unexpected error occurred while loading variable colors."))
)
def set_colors(self, variable):
try:
self.shell_colors[variable["name"]] = variable["default_value"]
except KeyError:
try:
self.shell_colors[variable["name"]] = self.app.variables[variable["var_name"]]
except KeyError:
raise
@Gtk.Template.Callback()
def on_custom_colors_button_clicked(self, *_args):
self.shell_pref_window = GradienceShellPrefsWindow(self.parent, self.shell_colors)
self.shell_pref_window.present()
@Gtk.Template.Callback()
def on_apply_button_clicked(self, *_args):
user_themes_available = is_shell_ext_installed(ShellTheme().THEME_EXT_NAME)
user_themes_enabled = is_shell_ext_installed(
ShellTheme().THEME_EXT_NAME, check_enabled=True)
if not is_gnome_available():
dialog = Adw.MessageDialog(transient_for=self.win, heading=_("GNOME Shell Missing"),
body=_("Shell Engine is designed to work only on systems running GNOME. You can still generate themes on other desktop environments, but it won't have any affect on them."))
dialog.add_response("disable-engine", _("Disable Engine"))
dialog.add_response("continue-anyway", _("Continue Anyway"))
dialog.set_response_appearance("disable-engine", Adw.ResponseAppearance.DESTRUCTIVE)
dialog.set_default_response("continue-anyway")
dialog.connect("response", self.on_shell_missing_response)
dialog.present()
elif is_gnome_available() and not user_themes_available:
dialog = Adw.MessageDialog(transient_for=self.win, heading=_("User Themes Extension Missing"),
body=_("Gradience requires the User Themes extension installed to apply the Shell theme. You can still generate a theme, but you won't be able to apply it without this extension."))
dialog.add_response("install-extension", _("Install Extension"))
dialog.add_response("continue-anyway", _("Continue Anyway"))
dialog.set_response_appearance("install-extension", Adw.ResponseAppearance.SUGGESTED)
dialog.set_default_response("continue-anyway")
dialog.connect("response", self.on_user_themes_missing_response)
dialog.present()
elif is_gnome_available() and user_themes_available and not user_themes_enabled:
dialog = Adw.MessageDialog(transient_for=self.win, heading=_("User Themes Extension Disabled"),
body=_("The User Themes extension is currently disabled on your system. Please enable it to apply the theme."))
dialog.add_response("cancel", _("Cancel"))
#dialog.add_response("enable-extension", _("Enable Extension"))
dialog.add_response("continue-anyway", _("Continue Anyway"))
dialog.set_response_appearance("cancel", Adw.ResponseAppearance.SUGGESTED)
#dialog.set_response_appearance("enable-extension", Adw.ResponseAppearance.SUGGESTED)
dialog.set_default_response("continue-anyway")
dialog.connect("response", self.on_user_themes_disabled_response)
dialog.present()
else:
self.apply_shell_theme()
def apply_shell_theme(self):
variant_pos = self.variant_row.props.selected
class variantEnum(Enum):
DARK = 0
LIGHT = 1
def __get_variant_string():
if variant_pos == variantEnum.DARK.value:
return "dark"
elif variant_pos == variantEnum.LIGHT.value:
return "light"
variant_str = __get_variant_string()
try:
ShellTheme().apply_theme_async(self, self._on_shell_theme_done,
variant_str, self.app.preset)
except UnsupportedShellVersion as exception_message:
logging.error(exception_message)
GradienceUnsupportedShellDialog(self.parent).present()
except (ValueError, OSError, GLib.GError) as e:
logging.error(
"An error occurred while generating a Shell theme.", exc=e)
self.toast_overlay.add_toast(
Adw.Toast(
title=_("An error occurred while generating a Shell theme."))
)
def _on_shell_theme_done(self, source_widget:GObject.Object,
result:Gio.AsyncResult, user_data:GObject.GPointer):
logging.debug("It works! \o/")
self.toast_overlay.add_toast(
Adw.Toast(title=_("Shell theme applied successfully."))
)
def on_shell_missing_response(self, widget, response, *args):
if response == "disable-engine":
self.win.enabled_theme_engines.remove("shell")
enabled_engines = GLib.Variant.new_strv(list(self.win.enabled_theme_engines))
self.settings.set_value("enabled-theme-engines", enabled_engines)
self.win.reload_theming_page()
elif response == "continue-anyway":
self.apply_shell_theme()
# FIXME: Hangs until Extension Manager is closed. We might something like `run_app` function \
# with subrocess.Popen instead of subrocess.run to make it not hang Gradience
def on_user_themes_missing_response(self, widget, response, *args):
if response == "install-extension":
try:
cmd_list = ["xdg-open", "gnome-extensions://user-theme%40gnome-shell-extensions.gcampax.github.com?action=install"]
GradienceSubprocess().run(cmd_list, allow_escaping=True)
except SubprocessError:
logging.warning("Can't open 'gnome-extensions://' URI scheme, trying to open EGO webpage")
try:
cmd_list = ["xdg-open", "https://extensions.gnome.org/extension/19/user-themes/"]
GradienceSubprocess().run(cmd_list, allow_escaping=True)
except SubprocessError as e:
logging.error("Failed to load extension's website", exc=e)
self.toast_overlay.add_toast(
Adw.Toast(title=_("Failed to load extension's install link."))
)
except FileNotFoundError:
logging.error("xdg-open command missing, are you even on GNOME? \nOpen this link: https://extensions.gnome.org/extension/19/user-themes/")
self.toast_overlay.add_toast(
Adw.Toast(title=_("Failed to load extension's install link."))
)
elif response == "continue-anyway":
self.apply_shell_theme()
def on_user_themes_disabled_response(self, widget, response, *args):
'''if response == "enable-extension":
pass'''
if response == "continue-anyway":
self.apply_shell_theme()
@Gtk.Template.Callback()
def on_reset_theme_clicked(self, *_args):
# TODO: Make this function actually remove Shell theme
ShellTheme().reset_theme_async(self, self._on_reset_theme_done)
def _on_reset_theme_done(self, source_widget:GObject.Object,
result:Gio.AsyncResult, user_data:GObject.GPointer):
self.toast_overlay.add_toast(
Adw.Toast(title=_("Shell theme successfully reset."))
)
@Gtk.Template.Callback()
def on_restore_button_clicked(self, *_args):
logging.debug("Nothing here yet /o\ ")
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