From 1521cc20b6aab3489e9204be60737897aec80057 Mon Sep 17 00:00:00 2001 From: Claudiu Schuster Date: Wed, 9 Sep 2026 17:46:11 +0200 Subject: [PATCH] Add nemo-action-bar extension --- Readme.md | 1 + build-order | 1 + nemo-action-bar/COPYING | 339 ++++++++ nemo-action-bar/debian/changelog | 8 + nemo-action-bar/debian/compat | 1 + nemo-action-bar/debian/control | 28 + nemo-action-bar/debian/copyright | 21 + nemo-action-bar/debian/rules | 14 + nemo-action-bar/setup.py | 26 + nemo-action-bar/src/buttons.json | 128 +++ .../nemo-action-bar-duplicate-symbolic.svg | 4 + nemo-action-bar/src/nemo_action_bar.py | 821 ++++++++++++++++++ 12 files changed, 1392 insertions(+) create mode 100644 nemo-action-bar/COPYING create mode 100644 nemo-action-bar/debian/changelog create mode 100644 nemo-action-bar/debian/compat create mode 100644 nemo-action-bar/debian/control create mode 100644 nemo-action-bar/debian/copyright create mode 100755 nemo-action-bar/debian/rules create mode 100755 nemo-action-bar/setup.py create mode 100644 nemo-action-bar/src/buttons.json create mode 100644 nemo-action-bar/src/icons/nemo-action-bar-duplicate-symbolic.svg create mode 100644 nemo-action-bar/src/nemo_action_bar.py diff --git a/Readme.md b/Readme.md index 8aeb12a9..cb33ea79 100644 --- a/Readme.md +++ b/Readme.md @@ -10,6 +10,7 @@ - nemo-pastebin: functional - nemo-compare: functional - nemo-python (python bindings for Nemo): functional +- nemo-action-bar: functional - nemo-terminal: functional (forked from nautilus-terminal-1.0.0) - nemo-filename-repairer forked from (nautilus-filename-repairer-0.0.6) - nemo-image-converter forked from (nautilus-image-converter-0.3.1) diff --git a/build-order b/build-order index 3cffa070..d68a7ea2 100644 --- a/build-order +++ b/build-order @@ -1,6 +1,7 @@ # nemo-python is needed for some of the # subprojects to install properly. nemo-python +nemo-action-bar nemo-audio-tab nemo-compare nemo-dropbox diff --git a/nemo-action-bar/COPYING b/nemo-action-bar/COPYING new file mode 100644 index 00000000..d159169d --- /dev/null +++ b/nemo-action-bar/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/nemo-action-bar/debian/changelog b/nemo-action-bar/debian/changelog new file mode 100644 index 00000000..3be85ae4 --- /dev/null +++ b/nemo-action-bar/debian/changelog @@ -0,0 +1,8 @@ +nemo-action-bar (2.0.0) unstable; urgency=medium + + * Add Nemo Action Bar as a configurable native GTK action bar. + * Copy the current Nemo folder path when Copy Paths is used without a + selection. + * Preserve selected file and folder path copying. + + -- Claudiu Schuster Wed, 09 Sep 2026 17:45:00 +0200 diff --git a/nemo-action-bar/debian/compat b/nemo-action-bar/debian/compat new file mode 100644 index 00000000..48082f72 --- /dev/null +++ b/nemo-action-bar/debian/compat @@ -0,0 +1 @@ +12 diff --git a/nemo-action-bar/debian/control b/nemo-action-bar/debian/control new file mode 100644 index 00000000..25c533e6 --- /dev/null +++ b/nemo-action-bar/debian/control @@ -0,0 +1,28 @@ +Source: nemo-action-bar +Section: gnome +Priority: optional +Maintainer: Claudiu Schuster +Build-Depends: debhelper (>= 12), + python3-all, + python3-setuptools, + dh-python +Standards-Version: 4.6.0 +Homepage: https://github.com/oss-singularity/nemo-action-bar + +Package: nemo-action-bar +Architecture: all +Section: utils +Priority: optional +Depends: ${misc:Depends}, + gir1.2-glib-2.0, + gir1.2-gtk-3.0, + gir1.2-nemo-3.0, + nemo, + python-nemo (>= 3.9.0), + python3 +Description: configurable GTK action bar for Nemo + Nemo Action Bar is a Nemo Python extension that places a configurable + native GTK action bar above the directory view. + . + It exposes native Nemo actions, preserves user configuration during + upgrades and does not execute arbitrary commands from its JSON file. diff --git a/nemo-action-bar/debian/copyright b/nemo-action-bar/debian/copyright new file mode 100644 index 00000000..87399694 --- /dev/null +++ b/nemo-action-bar/debian/copyright @@ -0,0 +1,21 @@ +Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ +Upstream-Name: nemo-action-bar +Source: https://github.com/oss-singularity/nemo-action-bar + +Files: * +Copyright: 2026 Claudiu Schuster +License: GPL-2+ + +License: GPL-2+ + 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 2, 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. + . + On Debian systems, the complete text of the GNU General Public License + version 2 can be found in /usr/share/common-licenses/GPL-2. diff --git a/nemo-action-bar/debian/rules b/nemo-action-bar/debian/rules new file mode 100755 index 00000000..dcbe00f2 --- /dev/null +++ b/nemo-action-bar/debian/rules @@ -0,0 +1,14 @@ +#!/usr/bin/make -f + +export PYBUILD_NAME=nemo-action-bar + +%: + dh $@ --buildsystem=pybuild + +override_dh_auto_install: + install -D -m 0644 src/nemo_action_bar.py \ + debian/nemo-action-bar/usr/share/nemo-python/extensions/nemo_action_bar.py + install -D -m 0644 src/buttons.json \ + debian/nemo-action-bar/usr/share/nemo-action-bar/buttons.json + install -D -m 0644 src/icons/nemo-action-bar-duplicate-symbolic.svg \ + debian/nemo-action-bar/usr/share/nemo-action-bar/icons/nemo-action-bar-duplicate-symbolic.svg diff --git a/nemo-action-bar/setup.py b/nemo-action-bar/setup.py new file mode 100755 index 00000000..e4d70054 --- /dev/null +++ b/nemo-action-bar/setup.py @@ -0,0 +1,26 @@ +#!/usr/bin/python3 + +from setuptools import setup + + +setup( + packages=[], + name="nemo-action-bar", + version="2.0.0", + description="A configurable GTK action bar for the Nemo file manager", + author="Claudiu Schuster", + author_email="info@claudiuschuster.de", + url="https://github.com/oss-singularity/nemo-action-bar", + license="GPL-2+", + data_files=[ + ( + "/usr/share/nemo-python/extensions", + ["src/nemo_action_bar.py"], + ), + ("/usr/share/nemo-action-bar", ["src/buttons.json"]), + ( + "/usr/share/nemo-action-bar/icons", + ["src/icons/nemo-action-bar-duplicate-symbolic.svg"], + ), + ], +) diff --git a/nemo-action-bar/src/buttons.json b/nemo-action-bar/src/buttons.json new file mode 100644 index 00000000..8f46842e --- /dev/null +++ b/nemo-action-bar/src/buttons.json @@ -0,0 +1,128 @@ +{ + "version": 1, + "appearance": { + "alignment": "end", + "icon-size": 16, + "show-labels": false, + "spacing": 2 + }, + "buttons": [ + { + "id": "new-folder", + "label": "New Folder", + "icon": "folder-new-symbolic", + "action": "new-folder" + }, + { "type": "separator" }, + { + "id": "cut", + "label": "Cut", + "icon": "edit-cut-symbolic", + "action": "cut" + }, + { + "id": "copy", + "label": "Copy", + "icon": "edit-copy-symbolic", + "action": "copy" + }, + { + "id": "paste", + "label": "Paste", + "icon": "edit-paste-symbolic", + "action": "paste" + }, + { + "id": "duplicate", + "label": "Duplicate", + "icon": "nemo-action-bar-duplicate-symbolic", + "action": "duplicate" + }, + { + "id": "rename", + "label": "Rename", + "icon": "document-edit-symbolic", + "action": "rename" + }, + { "type": "separator" }, + { + "id": "undo", + "label": "Undo", + "icon": "edit-undo-symbolic", + "action": "undo" + }, + { + "id": "redo", + "label": "Redo", + "icon": "edit-redo-symbolic", + "action": "redo" + }, + { "type": "separator" }, + { + "id": "properties", + "label": "Properties", + "icon": "document-properties-symbolic", + "action": "properties" + }, + { + "id": "select-all", + "label": "Select All", + "icon": "edit-select-all-symbolic", + "action": "select-all" + }, + { + "id": "show-hidden", + "label": "Toggle Hidden Files", + "icon": "view-reveal-symbolic", + "action": "show-hidden" + }, + { "type": "separator" }, + { + "id": "copy-path", + "label": "Copy Paths", + "icon": "insert-link-symbolic", + "action": "copy-path" + }, + { + "id": "open-terminal", + "label": "Open in Terminal", + "icon": "utilities-terminal-symbolic", + "action": "open-terminal" + }, + { + "id": "open-admin", + "label": "Open as Administrator", + "icon": "dialog-password-symbolic", + "action": "open-admin", + "enabled": false + }, + { + "id": "favorite", + "label": "Toggle Favorite", + "icon": "xsi-favorite-symbolic", + "action": "favorite-toggle", + "enabled": false + }, + { + "id": "archive-create", + "label": "Create Archive", + "icon": "xsi-add-files-to-archive-symbolic", + "action": "archive-create", + "enabled": false + }, + { + "id": "archive-extract", + "label": "Extract Here", + "icon": "xsi-extract-archive-symbolic", + "action": "archive-extract", + "enabled": false + }, + { "type": "separator" }, + { + "id": "trash", + "label": "Move to Trash", + "icon": "user-trash-symbolic", + "action": "trash" + } + ] +} diff --git a/nemo-action-bar/src/icons/nemo-action-bar-duplicate-symbolic.svg b/nemo-action-bar/src/icons/nemo-action-bar-duplicate-symbolic.svg new file mode 100644 index 00000000..b80404bf --- /dev/null +++ b/nemo-action-bar/src/icons/nemo-action-bar-duplicate-symbolic.svg @@ -0,0 +1,4 @@ + + + + diff --git a/nemo-action-bar/src/nemo_action_bar.py b/nemo-action-bar/src/nemo_action_bar.py new file mode 100644 index 00000000..b36a0867 --- /dev/null +++ b/nemo-action-bar/src/nemo_action_bar.py @@ -0,0 +1,821 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +"""A small, declaratively configured action bar for Nemo. + +Nemo's public extension API cannot add buttons to its built-in toolbar. A +LocationWidgetProvider is therefore used to place a native GTK bar directly +above the directory view. Buttons activate a small allowlist of Nemo's own +GtkActions (with keyboard accelerators as compatibility fallbacks), so +selection handling, confirmation dialogs and file operations stay inside Nemo. +""" + +from __future__ import annotations + +import copy +import json +import os +import sys +import weakref +from pathlib import Path +from typing import Any + +import gi + +gi.require_version("Gtk", "3.0") +gi.require_version("Gdk", "3.0") +gi.require_version("Atk", "1.0") +gi.require_version("Nemo", "3.0") + +from gi.repository import Atk, Gdk, Gio, GLib, GObject, Gtk, Nemo + + +def _config_path() -> Path: + config_root = Path( + os.environ.get("XDG_CONFIG_HOME") or str(Path.home() / ".config") + ) + return Path( + os.environ.get("NEMO_ACTION_BAR_CONFIG") + or str(config_root / "nemo-action-bar" / "buttons.json") + ) + + +CONFIG_PATH = _config_path() +DATA_ROOT = Path( + os.environ.get("XDG_DATA_HOME") or str(Path.home() / ".local" / "share") +) +SYSTEM_DATA_ROOTS = tuple( + Path(value) + for value in ( + os.environ.get("XDG_DATA_DIRS") or "/usr/local/share:/usr/share" + ).split(os.pathsep) + if value +) +ICON_SEARCH_PATHS = ( + Path(__file__).resolve().parent / "icons", + DATA_ROOT / "nemo-action-bar" / "icons", + *(root / "nemo-action-bar" / "icons" for root in SYSTEM_DATA_ROOTS), +) + +# Public, stable identifiers accepted by buttons.json. The GtkAction names are +# Nemo's internal names, not user-controlled command lines. Multiple names let +# a single toolbar button follow stateful actions such as Favorite/Unfavorite. +ACTION_DEFINITIONS: dict[str, dict[str, Any]] = { + "new-folder": {"names": ("New Folder",), "shortcut": "n"}, + "cut": {"names": ("Cut",), "shortcut": "x"}, + "copy": {"names": ("Copy",), "shortcut": "c"}, + "paste": {"names": ("Paste",), "shortcut": "v"}, + "duplicate": {"names": ("Duplicate",)}, + "rename": {"names": ("Rename",), "shortcut": "F2"}, + "undo": {"names": ("Undo",), "shortcut": "z"}, + "redo": {"names": ("Redo",), "shortcut": "y"}, + "properties": {"names": ("Properties",), "shortcut": "Return"}, + "select-all": {"names": ("Select All",), "shortcut": "a"}, + "show-hidden": { + "names": ("Show Hidden Files",), + "shortcut": "h", + }, + "trash": {"names": ("Trash",), "shortcut": "Delete"}, + "open-terminal": { + "names": ("OpenInTerminal",), + "shortcut": "F4", + }, + "open-admin": {"names": ("OpenAsRoot",)}, + "favorite-toggle": {"names": ("Favorite File", "Unfavorite File")}, + "archive-create": {"names": ("NemoFr::add",), "requires": "nemo-fileroller"}, + "archive-extract": { + "names": ("NemoFr::extract_here",), + "requires": "nemo-fileroller", + }, + "copy-path": {"handler": "copy-path"}, +} + +DEFAULT_CONFIG: dict[str, Any] = { + "version": 1, + "appearance": { + "alignment": "end", + "icon-size": 16, + "show-labels": False, + "spacing": 2, + }, + "buttons": [ + { + "id": "new-folder", + "label": "New Folder", + "icon": "folder-new-symbolic", + "action": "new-folder", + }, + {"type": "separator"}, + { + "id": "cut", + "label": "Cut", + "icon": "edit-cut-symbolic", + "action": "cut", + }, + { + "id": "copy", + "label": "Copy", + "icon": "edit-copy-symbolic", + "action": "copy", + }, + { + "id": "paste", + "label": "Paste", + "icon": "edit-paste-symbolic", + "action": "paste", + }, + { + "id": "duplicate", + "label": "Duplicate", + "icon": "nemo-action-bar-duplicate-symbolic", + "action": "duplicate", + }, + { + "id": "rename", + "label": "Rename", + "icon": "document-edit-symbolic", + "action": "rename", + }, + {"type": "separator"}, + { + "id": "undo", + "label": "Undo", + "icon": "edit-undo-symbolic", + "action": "undo", + }, + { + "id": "redo", + "label": "Redo", + "icon": "edit-redo-symbolic", + "action": "redo", + }, + {"type": "separator"}, + { + "id": "properties", + "label": "Properties", + "icon": "document-properties-symbolic", + "action": "properties", + }, + { + "id": "select-all", + "label": "Select All", + "icon": "edit-select-all-symbolic", + "action": "select-all", + }, + { + "id": "show-hidden", + "label": "Toggle Hidden Files", + "icon": "view-reveal-symbolic", + "action": "show-hidden", + }, + {"type": "separator"}, + { + "id": "copy-path", + "label": "Copy Paths", + "icon": "insert-link-symbolic", + "action": "copy-path", + }, + { + "id": "open-terminal", + "label": "Open in Terminal", + "icon": "utilities-terminal-symbolic", + "action": "open-terminal", + }, + { + "id": "open-admin", + "label": "Open as Administrator", + "icon": "dialog-password-symbolic", + "action": "open-admin", + "enabled": False, + }, + { + "id": "favorite", + "label": "Toggle Favorite", + "icon": "xsi-favorite-symbolic", + "action": "favorite-toggle", + "enabled": False, + }, + { + "id": "archive-create", + "label": "Create Archive", + "icon": "xsi-add-files-to-archive-symbolic", + "action": "archive-create", + "enabled": False, + }, + { + "id": "archive-extract", + "label": "Extract Here", + "icon": "xsi-extract-archive-symbolic", + "action": "archive-extract", + "enabled": False, + }, + {"type": "separator"}, + { + "id": "trash", + "label": "Move to Trash", + "icon": "user-trash-symbolic", + "action": "trash", + }, + ], +} + +MAX_BUTTONS = 32 +NEMO_FILE_ACTION_GROUPS = ("DirViewActions",) +NEMO_DESKTOP_URI_PREFIX = "x-nemo-desktop:" +NEMO_CONTENT_VIEW_NAMES = frozenset({"Icon View", "List View", "Compact View"}) +# Nemo refreshes these states when its menus are updated. The action callbacks +# still consult the live undo manager, so activating a stale-insensitive proxy +# is safe and more reliable than synthesizing Ctrl+Z/Ctrl+Y. +FORCE_LAZY_ACTIONS = frozenset({"undo", "redo"}) +MONITORED_EVENTS = { + Gio.FileMonitorEvent.CHANGED, + Gio.FileMonitorEvent.CHANGES_DONE_HINT, + Gio.FileMonitorEvent.CREATED, + Gio.FileMonitorEvent.DELETED, + Gio.FileMonitorEvent.MOVED_IN, + Gio.FileMonitorEvent.MOVED_OUT, +} + + +def _prefer_action_groups( + actions: list[Gtk.Action], group_names: tuple[str, ...] +) -> list[Gtk.Action]: + """Keep actions from Nemo's requested groups when they are available.""" + + if not group_names: + return actions + + preferred = [] + for action in actions: + action_group = action.get_property("action-group") + if action_group is not None and action_group.get_name() in group_names: + preferred.append(action) + return preferred or actions + + +def _is_nemo_desktop_location(uri: str) -> bool: + """Return whether URI identifies Nemo's desktop surface, not a folder.""" + + return uri.casefold().startswith(NEMO_DESKTOP_URI_PREFIX) + + +def _uri_to_path_text(uri: str) -> str | None: + """Return the user-facing path text for a Nemo location URI.""" + + if not uri or _is_nemo_desktop_location(uri): + return None + file = Gio.File.new_for_uri(uri) + return file.get_path() or file.get_parse_name() or None + + +def _uris_to_path_text(uris: list[str]) -> str | None: + """Return newline-separated path text for selected Nemo URIs.""" + + paths = [] + for uri in uris: + path = _uri_to_path_text(uri) + if path is None: + return None + paths.append(path) + return "\n".join(paths) if paths else None + + +def _activate_with_current_selection(action: Gtk.Action) -> None: + """Activate a Nemo view action even when its lazy menu state is stale.""" + + was_sensitive = action.get_sensitive() + if not was_sensitive: + action.set_sensitive(True) + try: + action.activate() + finally: + if not was_sensitive: + action.set_sensitive(False) + + +def _fail(message: str) -> None: + raise ValueError(message) + + +def _bounded_int(value: Any, name: str, minimum: int, maximum: int) -> int: + if isinstance(value, bool) or not isinstance(value, int): + _fail(f"{name} must be an integer") + if not minimum <= value <= maximum: + _fail(f"{name} must be between {minimum} and {maximum}") + return value + + +def validate_config(raw: Any) -> dict[str, Any]: + """Validate and normalize a version-1 action-bar configuration.""" + + if not isinstance(raw, dict): + _fail("The top-level JSON value must be an object") + if raw.get("version", 1) != 1: + _fail("Only configuration version 1 is supported") + + appearance_raw = raw.get("appearance", {}) + if not isinstance(appearance_raw, dict): + _fail("appearance must be an object") + + defaults = DEFAULT_CONFIG["appearance"] + alignment = appearance_raw.get("alignment", defaults["alignment"]) + if alignment not in {"start", "center", "end"}: + _fail("appearance.alignment must be start, center or end") + + appearance = { + "alignment": alignment, + "icon-size": _bounded_int( + appearance_raw.get("icon-size", defaults["icon-size"]), + "appearance.icon-size", + 12, + 64, + ), + "show-labels": appearance_raw.get( + "show-labels", defaults["show-labels"] + ), + "spacing": _bounded_int( + appearance_raw.get("spacing", defaults["spacing"]), + "appearance.spacing", + 0, + 24, + ), + } + if not isinstance(appearance["show-labels"], bool): + _fail("appearance.show-labels must be true or false") + + buttons_raw = raw.get("buttons", DEFAULT_CONFIG["buttons"]) + if not isinstance(buttons_raw, list): + _fail("buttons must be a list") + if len(buttons_raw) > MAX_BUTTONS: + _fail(f"At most {MAX_BUTTONS} entries are allowed") + + buttons: list[dict[str, Any]] = [] + seen_ids: set[str] = set() + for index, item in enumerate(buttons_raw): + if not isinstance(item, dict): + _fail(f"buttons[{index}] must be an object") + item_type = item.get("type", "button") + if item_type == "separator": + buttons.append({"type": "separator"}) + continue + if item_type != "button": + _fail(f"buttons[{index}].type must be button or separator") + + button_id = item.get("id") + label = item.get("label") + icon = item.get("icon") + action = item.get("action") + shortcut = item.get("shortcut") + enabled = item.get("enabled", True) + + for field_name, value, maximum in ( + ("id", button_id, 64), + ("label", label, 120), + ("icon", icon, 160), + ): + if not isinstance(value, str) or not value.strip(): + _fail(f"buttons[{index}].{field_name} must contain text") + if len(value) > maximum: + _fail(f"buttons[{index}].{field_name} is too long") + if action is not None: + if not isinstance(action, str) or action not in ACTION_DEFINITIONS: + _fail( + f"buttons[{index}].action is not supported: {action!r}" + ) + if shortcut is not None: + if not isinstance(shortcut, str) or not shortcut.strip(): + _fail(f"buttons[{index}].shortcut must contain text") + if len(shortcut) > 80: + _fail(f"buttons[{index}].shortcut is too long") + if action is None and shortcut is None: + _fail(f"buttons[{index}] requires action or shortcut") + if not isinstance(enabled, bool): + _fail(f"buttons[{index}].enabled must be true or false") + if button_id in seen_ids: + _fail(f"Duplicate button ID: {button_id}") + seen_ids.add(button_id) + + buttons.append( + { + "type": "button", + "id": button_id, + "label": label, + "icon": icon, + "action": action, + "shortcut": shortcut, + "enabled": enabled, + } + ) + + return {"version": 1, "appearance": appearance, "buttons": buttons} + + +def load_config(path: Path = CONFIG_PATH) -> dict[str, Any]: + if not path.exists(): + return validate_config(copy.deepcopy(DEFAULT_CONFIG)) + try: + raw = json.loads(path.read_text(encoding="utf-8")) + except (OSError, UnicodeError, json.JSONDecodeError) as error: + raise ValueError(f"Configuration cannot be read: {error}") from error + return validate_config(raw) + + +class ActionBar(Gtk.Box): + def __init__( + self, window: Gtk.Window, config: dict[str, Any], location_uri: str + ) -> None: + super().__init__(orientation=Gtk.Orientation.HORIZONTAL) + self._window = window + self._location_uri = location_uri + self._register_custom_icons() + self.set_hexpand(True) + self.get_style_context().add_class(Gtk.STYLE_CLASS_TOOLBAR) + self.rebuild(config) + + @staticmethod + def _register_custom_icons() -> None: + theme = Gtk.IconTheme.get_default() + if theme is None: + return + known_paths = set(theme.get_search_path()) + for path in ICON_SEARCH_PATHS: + path_text = str(path) + if path.is_dir() and path_text not in known_paths: + theme.append_search_path(path_text) + known_paths.add(path_text) + + def rebuild(self, config: dict[str, Any]) -> None: + for child in self.get_children(): + self.remove(child) + child.destroy() + + appearance = config["appearance"] + controls = Gtk.Box( + orientation=Gtk.Orientation.HORIZONTAL, + spacing=appearance["spacing"], + ) + controls.set_margin_start(4) + controls.set_margin_end(4) + controls.set_margin_top(1) + controls.set_margin_bottom(1) + + alignment = appearance["alignment"] + if alignment == "start": + self.pack_start(controls, False, False, 0) + elif alignment == "center": + self.pack_start(Gtk.Box(), True, True, 0) + self.pack_start(controls, False, False, 0) + self.pack_start(Gtk.Box(), True, True, 0) + else: + self.pack_end(controls, False, False, 0) + + for spec in config["buttons"]: + if spec["type"] == "separator": + separator = Gtk.Separator(orientation=Gtk.Orientation.VERTICAL) + separator.set_margin_start(3) + separator.set_margin_end(3) + controls.pack_start(separator, False, False, 0) + continue + if not spec["enabled"]: + continue + button = self._make_button(spec, appearance) + controls.pack_start(button, False, False, 0) + + self.show_all() + + def _make_button( + self, spec: dict[str, Any], appearance: dict[str, Any] + ) -> Gtk.Button: + button = Gtk.Button() + button.set_relief(Gtk.ReliefStyle.NONE) + button.set_can_focus(False) + button.set_focus_on_click(False) + button.get_style_context().add_class(Gtk.STYLE_CLASS_FLAT) + button.get_accessible().set_name(spec["label"]) + + image = Gtk.Image.new_from_icon_name(spec["icon"], Gtk.IconSize.BUTTON) + image.set_pixel_size(appearance["icon-size"]) + if appearance["show-labels"]: + content = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5) + content.pack_start(image, False, False, 0) + content.pack_start(Gtk.Label(label=spec["label"]), False, False, 0) + button.add(content) + else: + button.add(image) + + action_id = spec.get("action") + definition = ACTION_DEFINITIONS.get(action_id, {}) + shortcut = spec.get("shortcut") or definition.get("shortcut") + keyval = modifiers = None + if shortcut: + keyval, modifiers = Gtk.accelerator_parse(shortcut) + if not keyval or not Gtk.accelerator_valid(keyval, modifiers): + button.set_sensitive(False) + button.set_tooltip_text( + f"{spec['label']} – invalid shortcut: {shortcut}" + ) + return button + + tooltip = spec["label"] + if keyval: + tooltip += f" ({Gtk.accelerator_get_label(keyval, modifiers)})" + if definition.get("requires"): + tooltip += f" [{definition['requires']}]" + button.set_tooltip_text(tooltip) + button.connect( + "clicked", + self._queue_activation, + action_id, + keyval, + modifiers, + ) + return button + + def _queue_activation( + self, + _button: Gtk.Button, + action_id: str | None, + keyval: int | None, + modifiers: Gdk.ModifierType | None, + ) -> None: + GLib.idle_add(self._activate, action_id, keyval, modifiers) + + def _activate( + self, + action_id: str | None, + keyval: int | None, + modifiers: Gdk.ModifierType | None, + ) -> bool: + if action_id: + definition = ACTION_DEFINITIONS[action_id] + if definition.get("handler") == "copy-path": + self._copy_selected_paths() + return GLib.SOURCE_REMOVE + + action = self._find_nemo_action( + definition["names"], NEMO_FILE_ACTION_GROUPS + ) + if action is not None: + if action.get_sensitive(): + action.activate() + return GLib.SOURCE_REMOVE + if action_id in FORCE_LAZY_ACTIONS: + _activate_with_current_selection(action) + return GLib.SOURCE_REMOVE + if not keyval: + if ( + action_id != "open-admin" + and self._focused_selection_count() == 0 + ): + self._show_unavailable( + "Select at least one file first." + ) + return GLib.SOURCE_REMOVE + _activate_with_current_selection(action) + return GLib.SOURCE_REMOVE + + if keyval and modifiers is not None: + return self._activate_shortcut(keyval, modifiers) + + dependency = ACTION_DEFINITIONS.get(action_id, {}).get("requires") + detail = f"Required package: {dependency}" if dependency else None + self._show_unavailable("This Nemo action is currently unavailable.", detail) + return GLib.SOURCE_REMOVE + + def _find_nemo_action( + self, + names: tuple[str, ...], + preferred_groups: tuple[str, ...] = (), + ) -> Gtk.Action | None: + matches: dict[str, list[Gtk.Action]] = {name: [] for name in names} + action_groups: list[Gtk.ActionGroup] = [] + for widget in self._walk_widgets(self._window): + if not isinstance(widget, Gtk.Activatable): + continue + action = widget.get_related_action() + if action is None: + continue + action_group = action.get_property("action-group") + if action_group is not None and action_group not in action_groups: + action_groups.append(action_group) + name = action.get_name() + if name in matches and action not in matches[name]: + matches[name].append(action) + + # Several useful Nemo actions only have context-menu proxies. Once any + # proxy from their GtkActionGroup is known, query the group directly so + # hidden menu preferences do not disable the toolbar button. + for action_group in action_groups: + for name in names: + action = action_group.get_action(name) + if action is not None and action not in matches[name]: + matches[name].append(action) + + ordered = [action for name in names for action in matches[name]] + ordered = _prefer_action_groups(ordered, preferred_groups) + for action in ordered: + if action.get_visible() and action.get_sensitive(): + return action + for action in ordered: + if action.get_visible(): + return action + return ordered[0] if ordered else None + + @staticmethod + def _walk_widgets(root: Gtk.Widget): + stack = [root] + seen: set[Gtk.Widget] = set() + while stack: + widget = stack.pop() + if widget in seen: + continue + seen.add(widget) + yield widget + + if isinstance(widget, Gtk.MenuItem): + submenu = widget.get_submenu() + if submenu is not None: + stack.append(submenu) + if isinstance(widget, Gtk.Container): + stack.extend(widget.get_children()) + try: + stack.extend(Gtk.Menu.get_for_attach_widget(widget)) + except (TypeError, RuntimeError): + pass + + def _copy_selected_paths(self) -> None: + if self._focused_selection_count() == 0: + self._copy_current_location() + return + + action = self._find_nemo_action(("Copy",), NEMO_FILE_ACTION_GROUPS) + if action is not None: + # Nemo updates GtkAction sensitivity lazily with its Edit/context + # menu. Its callback reads the live selection from NemoView. + _activate_with_current_selection(action) + else: + # Some Nemo builds do not expose DirViewActions through their menu + # proxies. The native Ctrl+C binding reaches the focused view and + # produces the same URI clipboard payload. + keyval, modifiers = Gtk.accelerator_parse( + ACTION_DEFINITIONS["copy"]["shortcut"] + ) + self._activate_shortcut(keyval, modifiers) + + clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD) + uris = clipboard.wait_for_uris() or [] + text = _uris_to_path_text(uris) + if text is None: + self._show_unavailable("The selected paths could not be read.") + return + + clipboard.set_text(text, -1) + clipboard.store() + + def _copy_current_location(self) -> None: + text = _uri_to_path_text(self._location_uri) + if text is None: + self._show_unavailable("The current folder path could not be read.") + return + + clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD) + clipboard.set_text(text, -1) + clipboard.store() + + def _focused_selection_count(self) -> int | None: + """Return the active file view's ATK selection count when available.""" + + widget = self._window.get_focus() + seen: set[Gtk.Widget] = set() + while isinstance(widget, Gtk.Widget) and widget not in seen: + seen.add(widget) + accessible = widget.get_accessible() + if isinstance(accessible, Atk.Selection): + return accessible.get_selection_count() + if widget is self._window: + break + widget = widget.get_parent() + + # Clicking a non-focusable action-bar button can leave the focus on a + # sidebar or on the window itself. Nemo gives its directory views + # stable accessible names, so use them as a focus-independent fallback + # and do not accidentally treat the sidebar's selection as a file. + for candidate in self._walk_widgets(self._window): + accessible = candidate.get_accessible() + if ( + isinstance(accessible, Atk.Selection) + and accessible.get_name() in NEMO_CONTENT_VIEW_NAMES + ): + return accessible.get_selection_count() + return None + + def _show_unavailable(self, message: str, detail: str | None = None) -> None: + dialog = Gtk.MessageDialog( + transient_for=self._window, + modal=False, + destroy_with_parent=True, + message_type=Gtk.MessageType.INFO, + buttons=Gtk.ButtonsType.CLOSE, + text=message, + ) + if detail: + dialog.format_secondary_text(detail) + dialog.connect("response", lambda current, _response: current.destroy()) + dialog.show() + + def _activate_shortcut( + self, keyval: int, modifiers: Gdk.ModifierType + ) -> bool: + if not self._window or not self._window.get_realized(): + return GLib.SOURCE_REMOVE + + activated = Gtk.accel_groups_activate(self._window, keyval, modifiers) + if not activated: + # Some Nemo shortcuts are GTK key bindings rather than entries in + # an accelerator group. Gtk.Window.activate_key() requires the + # concrete EventKey wrapper, not a generic Gdk.Event instance. + event = Gdk.EventKey() + event.type = Gdk.EventType.KEY_PRESS + event.window = self._window.get_window() + event.send_event = True + event.time = Gtk.get_current_event_time() + event.state = modifiers + event.keyval = keyval + event.hardware_keycode = 0 + event.group = 0 + self._window.activate_key(event) + return GLib.SOURCE_REMOVE + + +class NemoActionBarProvider(GObject.GObject, Nemo.LocationWidgetProvider): + def __init__(self) -> None: + super().__init__() + self._bars: list[weakref.ReferenceType[ActionBar]] = [] + self._reload_source = 0 + self._config = self._load_or_default() + self._monitor = self._create_monitor() + + def get_widget(self, uri: str, window: Gtk.Window) -> Gtk.Widget | None: + # Nemo asks LocationWidgetProviders for its desktop view too. Returning + # None is the supported way to decline a location-specific widget. + if _is_nemo_desktop_location(uri): + return None + + bar = ActionBar(window, self._config, uri) + self._bars.append(weakref.ref(bar)) + return bar + + def _load_or_default(self) -> dict[str, Any]: + try: + return load_config() + except ValueError as error: + print(f"Nemo Action Bar: {error}; using defaults", file=sys.stderr) + return validate_config(copy.deepcopy(DEFAULT_CONFIG)) + + def _create_monitor(self): + try: + CONFIG_PATH.parent.mkdir(parents=True, exist_ok=True) + monitor = Gio.File.new_for_path(str(CONFIG_PATH.parent)).monitor_directory( + Gio.FileMonitorFlags.NONE, None + ) + monitor.connect("changed", self._on_config_changed) + return monitor + except GLib.Error as error: + print(f"Nemo Action Bar: live reload unavailable: {error}", file=sys.stderr) + return None + + def _on_config_changed( + self, + _monitor, + file: Gio.File, + other_file: Gio.File | None, + event_type: Gio.FileMonitorEvent, + ) -> None: + if event_type not in MONITORED_EVENTS: + return + names = {candidate.get_basename() for candidate in (file, other_file) if candidate} + if CONFIG_PATH.name not in names: + return + if self._reload_source: + GLib.source_remove(self._reload_source) + self._reload_source = GLib.timeout_add(150, self._reload_config) + + def _reload_config(self) -> bool: + self._reload_source = 0 + try: + new_config = load_config() + except ValueError as error: + print( + f"Nemo Action Bar: change ignored; keeping the last valid " + f"configuration: {error}", + file=sys.stderr, + ) + return GLib.SOURCE_REMOVE + + self._config = new_config + live_bars: list[weakref.ReferenceType[ActionBar]] = [] + for reference in self._bars: + bar = reference() + if bar is not None: + bar.rebuild(new_config) + live_bars.append(reference) + self._bars = live_bars + return GLib.SOURCE_REMOVE