initial version
This commit is contained in:
Marcin Jakubowski
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/* extension.js
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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const { Clutter, Gio, GLib, GObject, Meta, Shell, St } = imports.gi;
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const ExtensionUtils = imports.misc.extensionUtils;
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const Me = ExtensionUtils.getCurrentExtension();
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const Prefs = Me.imports.prefs;
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const Main = imports.ui.main;
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const MessageTray = imports.ui.messageTray.MessageTray;
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const Lang = imports.lang;
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const BannerBin = Main.messageTray._bannerBin;
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const { NOTIFICATION_TIMEOUT, HIDE_TIMEOUT, LONGER_HIDE_TIMEOUT, IDLE_TIME, State, Urgency } = imports.ui.messageTray;
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let ANIMATION_TIME = 200;
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let ANIMATION_DIRECTION = 2;
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let ANCHOR_VERTICAL = 0;
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let ANCHOR_HORIZONTAL = 2;
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function patcher(obj, method, original, patch) {
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const body = eval(`${obj}.prototype.${method}.toString()`);
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const newBody = body.replace(original, patch).replace(method + "(", "function(")
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eval(`${obj}.prototype.${method} = ${newBody}`);
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}
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const originalShow = MessageTray.prototype._showNotification;
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const originalHide = MessageTray.prototype._hideNotification;
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const originalUpdateShowing = MessageTray.prototype._updateShowingNotification;
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function calcTarget(self) {
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let x = 0, y = 0;
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switch (ANCHOR_HORIZONTAL) {
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case 0: // left
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x = 0;
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break;
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case 1: // right
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x = global.screen_width - self._banner.width;
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break;
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case 2: // center
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x = (global.screen_width - self._banner.width) / 2.0;
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break;
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}
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switch (ANCHOR_VERTICAL) {
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case 0: // top
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y = 0;
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break;
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case 1: // bottom
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y = global.screen_height - self._banner.height;
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break;
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case 2: // center
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y = (global.screen_height - self._banner.height) / 2.0;
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break;
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}
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return { x, y }
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}
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function calcHide(self) {
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let { x, y } = calcTarget(self)
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switch (ANIMATION_DIRECTION) {
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case 0: // from left
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x = -self._banner.width;
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break;
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case 1: // from right
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x = global.screen_width;
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break;
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case 2: // from top
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y = -self._banner.height
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break;
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case 3: // from bottom
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y = global.screen_height
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break;
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}
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return { x, y }
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}
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function calcStart(self) {
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const { x, y } = calcHide(self);
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self._bannerBin.x = x;
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self._bannerBin.y = y;
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// if banner is not expanded and anchored to the bottom
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// it won't have enough vertical space to expand
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// in such case, move it up enough to fit the expanded banner
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if (!self._banner.expanded && ANCHOR_VERTICAL == 1) {
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const unexpandedHeight = self._banner.height
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// expand without animation to measure height
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self._banner.expand(false);
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const expandedDifference = self._banner.height - unexpandedHeight;
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// go back to unexpanded
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self._banner.unexpand(false);
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// move up when needed
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self._banner.connect('expanded', () => {
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self._bannerBin.ease({
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y: self._bannerBin.y - expandedDifference,
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duration: ANIMATION_TIME,
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mode: Clutter.AnimationMode.EASE_OUT_QUAD,
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});
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});
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}
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}
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// each of the methods has hardcoded values for showing banners
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// at the top. instead of rewriting whole functions, just patch the
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// relevant lines
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const patches = [
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{
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"obj": "MessageTray", "method": "_updateShowingNotification",
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"original": 'y: 0',
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"patch": '...calcTarget(this)'
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},
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{
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"obj": "MessageTray", "method": "_showNotification",
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"original": 'this._bannerBin.y = -this._banner.height',
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"patch": 'calcStart(this)'
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},
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{
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"obj": "MessageTray", "method": "_hideNotification",
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"original": 'y: -this._bannerBin.height',
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"patch": '...calcHide(this)'
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}
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];
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class Extension {
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constructor() {
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this._previous_y_align = BannerBin.get_y_align();
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this._previous_x_align = BannerBin.get_x_align();
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this._loadSettings();
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}
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_loadSettings() {
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this._settings = Prefs.SettingsSchema;
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this._settingsChangedId = this._settings.connect('changed',
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Lang.bind(this, this._onSettingsChange));
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this._fetchSettings();
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}
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_fetchSettings() {
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ANCHOR_VERTICAL = this._settings.get_int(Prefs.Fields.ANCHOR_VERTICAL);
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ANCHOR_HORIZONTAL = this._settings.get_int(Prefs.Fields.ANCHOR_HORIZONTAL);
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ANIMATION_DIRECTION = this._settings.get_int(Prefs.Fields.ANIMATION_DIRECTION);
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ANIMATION_TIME = this._settings.get_int(Prefs.Fields.ANIMATION_TIME);
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}
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_onSettingsChange() {
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this._fetchSettings();
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this.enable();
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}
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enable() {
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// generally alignment can be controller with START/CENTER/END
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// but CENTER and END are problematic to implement animations with
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// (especially x -> END and animations from left/right)
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// all positions will then be calculated in relation to the top-left
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// corner (START/START).
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let x_align = Clutter.ActorAlign.START;
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let y_align = Clutter.ActorAlign.START;
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BannerBin.set_x_align(x_align);
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BannerBin.set_y_align(y_align);
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this.restore()
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for (const { obj, method, original, patch } of patches) {
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patcher(obj, method, original, patch)
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}
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}
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disable() {
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BannerBin.set_x_align(this._previous_x_align);
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BannerBin.set_y_align(this._previous_y_align);
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BannerBin.x = 0
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BannerBin.y = 0
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this.restore()
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}
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restore() {
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MessageTray.prototype._hideNotification = originalHide;
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MessageTray.prototype._showNotification = originalShow;
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MessageTray.prototype._updateShowingNotification = originalUpdateShowing;
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}
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}
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function init() {
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return new Extension();
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}
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