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JavaScript

/* extension.js
*
* 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 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 <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
import Clutter from 'gi://Clutter';
import { Extension } from 'resource:///org/gnome/shell/extensions/extension.js';
import * as Main from 'resource:///org/gnome/shell/ui/main.js';
import { MessageTray } from 'resource:///org/gnome/shell/ui/messageTray.js';
import * as Utils from './utils.js';
const BannerBin = Main.messageTray._bannerBin;
/* Imports necessary by the code pulled in from messageTray.js */
import { State, Urgency } from 'resource:///org/gnome/shell/ui/messageTray.js';
import Gio from 'gi://Gio';
import GLib from 'gi://GLib';
import GObject from 'gi://GObject';
import Meta from 'gi://Meta';
import Shell from 'gi://Shell';
import St from 'gi://St';
import * as Calendar from 'resource:///org/gnome/shell/ui/calendar.js'
import * as MessageList from 'resource:///org/gnome/shell/ui/messageList.js'
const NOTIFICATION_TIMEOUT = 4000;
const HIDE_TIMEOUT = 200;
const LONGER_HIDE_TIMEOUT = 600;
const IDLE_TIME = 1000;
let ANIMATION_TIME = 200;
let ANIMATION_DIRECTION = 2;
let ANCHOR_VERTICAL = 0;
let ANCHOR_HORIZONTAL = 2;
let PADDING_VERTICAL = 0;
let PADDING_HORIZONTAL = 0;
let ALWAYS_MINIMIZE = 0;
function patcher(obj, live, method, original, patch) {
const body = eval(`${obj}.prototype.${method}.toString()`);
const newBody = body.replace(original, patch).replace(method + "(", "function(")
eval(`${obj}.prototype.${method} = ${newBody}`);
eval(`${live}.${method} = ${newBody}`);
}
const getMessageTraySize = () => {
const { width, height } = Main.layoutManager.getWorkAreaForMonitor(global.display.get_primary_monitor());
return {width, height};
}
const originalShow = MessageTray.prototype._showNotification;
const originalHide = MessageTray.prototype._hideNotification;
const originalUpdateShowing = MessageTray.prototype._updateShowingNotification;
function calcTarget(self) {
let x = 0, y = 0;
switch (ANCHOR_HORIZONTAL) {
case 0: // left
x = 0 + PADDING_HORIZONTAL;
break;
case 1: // right
x = getMessageTraySize().width - self._banner.width - PADDING_HORIZONTAL;
break;
case 2: // center
x = (getMessageTraySize().width - self._banner.width) / 2.0;
break;
}
switch (ANCHOR_VERTICAL) {
case 0: // top
y = 0 + PADDING_VERTICAL;
break;
case 1: // bottom
y = getMessageTraySize().height - self._banner.height - PADDING_VERTICAL;
break;
case 2: // center
y = (getMessageTraySize().height - self._banner.height) / 2.0;
break;
}
return { x, y }
}
function calcHide(self) {
let { x, y } = calcTarget(self)
switch (ANIMATION_DIRECTION) {
case 0: // from left
x = -self._banner.width;
break;
case 1: // from right
x = getMessageTraySize().width;
break;
case 2: // from top
y = -self._banner.height
break;
case 3: // from bottom
y = getMessageTraySize().height
break;
}
return { x, y }
}
function calcStart(self) {
const { x, y } = calcHide(self);
self._bannerBin.x = x;
self._bannerBin.y = y;
// if banner is not expanded and anchored to the bottom
// it won't have enough vertical space to expand
// in such case, move it up enough to fit the expanded banner
if (!self._banner.expanded && ANCHOR_VERTICAL == 1) {
const unexpandedHeight = self._banner.height
// expand without animation to measure height
self._banner.expand(false);
const expandedDifference = self._banner.height - unexpandedHeight;
// go back to unexpanded
self._banner.unexpand(false);
// move up when needed
self._banner.connect('expanded', () => {
self._bannerBin.ease({
y: self._bannerBin.y - expandedDifference,
duration: ANIMATION_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
});
});
}
}
// each of the methods has hardcoded values for showing banners
// at the top. instead of rewriting whole functions, just patch the
// relevant lines
const patches = [
{
"obj": "MessageTray", "method": "_updateShowingNotification",
"live": "Main.messageTray",
"original": 'y: 0',
"patch": '...calcTarget(this)'
},
{
"obj": "MessageTray", "method": "_showNotification",
"live": "Main.messageTray",
"original": 'this._bannerBin.y = -this._banner.height',
"patch": 'calcStart(this)'
},
{
"obj": "MessageTray", "method": "_hideNotification",
"live": "Main.messageTray",
"original": 'y: -this._bannerBin.height',
"patch": '...calcHide(this)'
}
];
const always_minimize_patch = {
obj: "MessageTray",
live: "Main.messageTray",
method: "_updateShowingNotification",
original: "this._expandBanner(true)",
patch: "// always minimized setting enabled by notification-banner-reloaded ... this._expandBanner(true)",
};
export default class NotificationExtension extends Extension {
constructor(metadata) {
super(metadata);
this._previous_y_align = BannerBin.get_y_align();
this._previous_x_align = BannerBin.get_x_align();
}
_loadSettings() {
this._settings = this.getSettings();
this._settingsChangedId = this._settings.connect('changed', this._onSettingsChange.bind(this));
this._fetchSettings();
}
_fetchSettings() {
ANCHOR_VERTICAL = this._settings.get_int(Utils.PrefFields.ANCHOR_VERTICAL);
ANCHOR_HORIZONTAL = this._settings.get_int(Utils.PrefFields.ANCHOR_HORIZONTAL);
PADDING_VERTICAL = this._settings.get_int(Utils.PrefFields.PADDING_VERTICAL);
PADDING_HORIZONTAL = this._settings.get_int(Utils.PrefFields.PADDING_HORIZONTAL);
ANIMATION_DIRECTION = this._settings.get_int(Utils.PrefFields.ANIMATION_DIRECTION);
ANIMATION_TIME = this._settings.get_int(Utils.PrefFields.ANIMATION_TIME);
ALWAYS_MINIMIZE = this._settings.get_int(Utils.PrefFields.ALWAYS_MINIMIZE);
}
_onSettingsChange() {
this._fetchSettings();
this.enable();
}
enable() {
this._loadSettings();
// generally alignment can be controller with START/CENTER/END
// but CENTER and END are problematic to implement animations with
// (especially x -> END and animations from left/right)
// all positions will then be calculated in relation to the top-left
// corner (START/START).
let x_align = Clutter.ActorAlign.START;
let y_align = Clutter.ActorAlign.START;
BannerBin.set_x_align(x_align);
BannerBin.set_y_align(y_align);
this.restore();
for (const { obj, live, method, original, patch } of patches) {
patcher(obj, live, method, original, patch)
}
if (ALWAYS_MINIMIZE) {
const { obj, live, method, original, patch } = always_minimize_patch;
patcher(obj, live, method, original, patch);
}
}
disable() {
BannerBin.set_x_align(this._previous_x_align);
BannerBin.set_y_align(this._previous_y_align);
BannerBin.x = 0
BannerBin.y = 0
this.restore()
if (this._settingsChangedId) {
this._settings.disconnect(this._settingsChangedId);
this._settingsChangedId = null;
}
this._settings = null;
}
restore() {
MessageTray.prototype._hideNotification = originalHide;
MessageTray.prototype._showNotification = originalShow;
MessageTray.prototype._updateShowingNotification = originalUpdateShowing;
}
}