GnomeShellGenericMonitor/extension.js

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/* 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 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 <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
/* Based on https://stackoverflow.com/questions/33001192/how-to-send-a-string-to-a-gnome-shell-extension */
/*
Some useful documentation :
https://github.com/bananenfisch/RecentItems/blob/master/extension.js
https://github.com/julio641742/gnome-shell-extension-reference/blob/master/tutorials/POPUPMENU-EXTENSION.md
https://gjs-docs.gnome.org/st10~1.0_api/st.widget
https://gitlab.gnome.org/GNOME/gnome-shell/-/blob/master/js/ui/panelMenu.js
https://gitlab.gnome.org/GNOME/gnome-shell/-/blob/master/js/ui/popupMenu.js
https://gitlab.gnome.org/GNOME/gnome-shell/-/blob/master/js/ui/panel.js
*/
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const St = imports.gi.St;
const Gio = imports.gi.Gio;
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const Lang = imports.lang;
const GLib = imports.gi.GLib
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const Main = imports.ui.main;
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const Mainloop = imports.mainloop;
const Clutter = imports.gi.Clutter;
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const PanelMenu = imports.ui.panelMenu;
const PopupMenu = imports.ui.popupMenu;
const GObject = imports.gi.GObject;
const Pixbuf = imports.gi.GdkPixbuf;
const Cogl = imports.gi.Cogl;
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function hash_get(hash, key, default_value) {
if (hash.hasOwnProperty(key))
return hash[key];
return default_value;
}
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function log(message) {
global.log('[GenericMontior]', message);
}
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var MyPopupMenuItem = GObject.registerClass({
GTypeName: "MyPopupMenuItem"
},
class MyPopupMenuItem extends PopupMenu.PopupBaseMenuItem {
_init(widgets, params) {
super._init(params);
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this.box = new St.BoxLayout({ style_class: 'popup-combobox-item' });
this.box.set_vertical(true);
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for (let widgetIndex in widgets)
this.box.add(widgets[widgetIndex]);
this.add_child(this.box);
}
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});
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var MonitorWidget = GObject.registerClass({
GTypeName: "MonitorWidget"
},
class MonitorWidget extends PanelMenu.Button {
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_init(item, group, dbus, position) {
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super._init(0.0);
this.name = item['name'];
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this.group = group;
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this.fullname = this.name + '@' + this.group;
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this.dbus = dbus;
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this.signals = {}
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if (item.hasOwnProperty('icon'))
{
if (typeof(item['icon']) === "string")
this.icon = this._createIconOld(item);
else
this.icon = this._createIcon(item['icon']);
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if (this.icon !== null) {
this._connectWidgetSignals(this.icon);
this.add_child(this.icon);
}
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}
else
this.icon = null;
if (item.hasOwnProperty('text'))
{
if (typeof(item['text']) === "string")
this.widget = this._createTextOld(item);
else
this.widget = this._createText(item['text']);
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if (this.widget !== null) {
this._connectWidgetSignals(this.widget);
this.add_child(this.widget);
}
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}
else
this.widget = null;
if (item.hasOwnProperty('popup'))
this._createPopup(item['popup']);
this.onClick = hash_get(item, 'on-click', '');
this.onDblClick = hash_get(item, 'on-dblclick', '');
this.onRightClick = hash_get(item, 'on-rightclick', '');
this.onRightDblClick = hash_get(item, 'on-rightdblclick', '');
this.onEnter = hash_get(item, 'on-enter', '');
this.onLeave = hash_get(item, 'on-leave', '');
this.onScroll = hash_get(item, 'on-scroll', '');
let box = hash_get(item, 'box', 'center');
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if (box === 'right' && position == -1)
position = 0;
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this.connect('style-changed', this._onStyleChanged.bind(this));
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// Disable click event at PanelMenu.button level
this.setSensitive(false);
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this.nbClicks = 0;
this.button = -1;
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Main.panel.addToStatusArea(this.fullname, this, position, box);
}
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_onStyleChanged(actor) {
// Force these values to avoid big spaces between each widgets
this._minHPadding = 1;
this._natHPadding = 1;
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}
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_connectWidgetSignals(widget) {
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this.signals[widget] = [];
let id;
id = widget.connect('enter-event', this._onEnter.bind(this));
this.signals[widget].push(id);
id = widget.connect('leave-event', this._onLeave.bind(this));
this.signals[widget].push(id);
id = widget.connect('scroll-event', this._onScroll.bind(this));
this.signals[widget].push(id);
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widget.set_reactive(true);
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id = widget.connect('button-release-event', Lang.bind(this, this._clicked));
this.signals[widget].push(id);
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}
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_disconnectWidgetSignals(widget) {
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for(let idx in this.signals[widget])
widget.disconnect(this.signals[widget][idx]);
this.signals[widget] = null;
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}
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_createPopup(item) {
if (!item.hasOwnProperty('items')) {
return null;
}
let widgets = [];
for (let itemIndex in item['items']) {
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let widget = null;
let widgetDict = item['items'][itemIndex];
if (widgetDict.hasOwnProperty('text'))
widget = this._createText(widgetDict['text']);
else if (widgetDict.hasOwnProperty('picture'))
widget = this._createPicture(widgetDict['picture']);
if (widget !== null)
widgets.push(widget);
}
if (widgets.length > 0) {
this.menuItem = new MyPopupMenuItem(widgets, {});
this.menu.addMenuItem(this.menuItem);
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this.menu.setSensitive(false);
return this.menuItem;
}
return null;
}
_createTextOld(item) {
var item_values = {};
item_values = {'text':item['text']};
if (item.hasOwnProperty('style'))
item_values['style'] = item['style'];
return this._createText(item_values);
}
_createText(item) {
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if (!item.hasOwnProperty('text')) {
log("Text must have a \'text\' value");
return null;
}
let style = hash_get(item, 'style', '');
this.textProperties = item;
if (item['text'] === '') {
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return null;
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} else {
let widget = new St.Button({ label: item['text'] });
widget.set_style(style);
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return widget;
}
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}
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_createIconOld(item) {
var item_values = {};
item_values = {'path':item['icon']};
if (item.hasOwnProperty('iconStyle'))
item_values['style'] = item['iconStyle'];
return this._createIcon(item_values);
}
_createIcon(item) {
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if (!item.hasOwnProperty('path')) {
log("Icon must have a \'path\' value");
return null;
}
let style = hash_get(item, 'style', '');
this.iconProperties = item;
if (item['path'] === '') {
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return null;
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} else {
let gicon = Gio.icon_new_for_string(item['path']);
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gicon = new St.Icon({ gicon });
gicon.set_style(style);
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return gicon;
}
}
_createPicture(item) {
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if (!item.hasOwnProperty('path')) {
log("Picture must have a \'path\' value");
return null;
}
let width = hash_get(item, 'width', -1);
let height = hash_get(item, 'height', -1);
if (typeof(width) === "string")
width = parseInt(width, 10);
if (typeof(heigth) === "string")
heigth = parseInt(heigth, 10);
let img = new Clutter.Image();
let initial_pixbuf = Pixbuf.Pixbuf.new_from_file(item['path']);
img.set_data(initial_pixbuf.get_pixels(),
initial_pixbuf.get_has_alpha() ? Cogl.PixelFormat.RGBA_8888
: Cogl.PixelFormat.RGB_888,
initial_pixbuf.get_width(),
initial_pixbuf.get_height(),
initial_pixbuf.get_rowstride());
let picture = new Clutter.Actor();
picture.set_content(img);
picture.set_size((width != -1)?width:initial_pixbuf.get_width(),
(height != -1)?height:initial_pixbuf.get_height());
// Pack it in a box to avoid picture resize
let box = new St.BoxLayout({});
box.add_child(picture);
return box;
}
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_manageEventAction(action) {
if (action === 'open-popup')
this.menu.open(true);
else if (action === 'close-popup')
this.menu.close();
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else if (action === 'toggle-popup')
this.menu.toggle();
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else if (action == 'delete')
this.dbus.deleteItem(this, this.group);
return Clutter.EVENT_PROPAGATE;
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}
_manageLeaveEvent() {
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this._manageEventAction(this.onLeave);
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}
_doClickCallback() {
let right = '';
let nbClicks = '';
if (this.button == 3)
right = 'Right';
if (this.nbClicks > 1)
nbClicks = 'Dbl';
let signalName = 'on' + right + nbClicks + 'Click';
let action = 'signal';
switch(signalName) {
case 'onClick': action = this.onClick; break;
case 'onDblClick': action = this.onDblClick; break;
case 'onRightClick': action = this.onRightClick; break;
case 'onRightDblClick': action = this.onRightDblClick; break;
}
if (action === 'signal')
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this.dbus.emit_signal(signalName, this.fullname);
else
this._manageEventAction(action);
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this.nbClicks = 0;
this.button = -1;
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return false;
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}
_clicked(actor, event) {
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if (event.get_button() == this.button) {
this.nbClicks++;
} else {
this.button = event.get_button();
this.nbClicks = 1;
Mainloop.timeout_add(this.dbus.ClutterSettings['double-click-time'],
Lang.bind(this, this._doClickCallback));
}
return Clutter.EVENT_PROPAGATE;
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}
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_onEnter(actor, event) {
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if (this.onEnter === 'signal')
this.dbus.emit_signal('onEnter', this.fullname);
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else
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return this._manageEventAction(this.onEnter);
return Clutter.EVENT_PROPAGATE;
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}
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_onLeave(actor, event) {
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if (this.onLeave === 'signal')
this.dbus.emit_signal('onLeave', this.fullname);
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else
return this._manageEventAction(this.onEnter);
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return Clutter.EVENT_PROPAGATE;
}
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_onScroll(actor, event) {
if (this.onScroll === 'signal') {
let direction = event.get_scroll_direction ();
if (direction == Clutter.ScrollDirection.UP)
this.dbus.emit_signal('onScrollUp', this.fullname);
else if (direction == Clutter.ScrollDirection.DOWN)
this.dbus.emit_signal('onScrollDown', this.fullname);
} else
return this._manageEventAction(this.onEnter);
return Clutter.EVENT_PROPAGATE;
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}
update(item) {
let prevWidget = this.widget;
let prevIcon = this.icon;
if (item.hasOwnProperty('text'))
{
let text = '';
let style = '';
if (typeof(item['text']) === "string") {
text = hash_get(item, 'text', '');
style = hash_get(item, 'style', '');
} else {
let textValues = item['text'];
text = hash_get(textValues, 'text', '');
style = hash_get(textValues, 'style', '');
}
if (text !== '') {
if (!this.widget) {
if (typeof(item['text']) === "string")
this.widget = this._createTextOld(item);
else
this.widget = this._createText(item['text']);
this.insert_child_above(this.widget, this.icon);
} else {
this.widget.label = text;
}
}
if (style !== '' && this.widget) {
this.widget.set_style(style);
}
}
if (item.hasOwnProperty('icon'))
{
let icon = '';
let style = '';
if (typeof(item['icon']) === "string") {
icon = hash_get(item, 'icon', '');
style = hash_get(item, 'iconStyle', '');
} else {
let iconValues = item['icon'];
icon = hash_get(iconValues, 'path', '');
style = hash_get(textValues, 'style', '');
}
if (icon !== '') {
if (typeof(item['icon']) === "string")
this.icon = this._createIconOld(item);
else
this.icon = this._createIcon(item['icon']);
}
if (prevIcon) {
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this._disconnectWidgetSignals(prevIcon);
this.insert_child_above(this.icon, prevIcon);
this.remove_child(prevIcon);
//delete prevIcon;
} else
this.insert_child_before(this.icon, prevWidget);
if (style !== '' && this.icon) {
this.icon.set_style(style);
}
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}
if (item.hasOwnProperty('popup'))
{
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let menuOpen = this.menu.isOpen;
if (this.menuItem) {
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if (menuOpen)
this.menu.close();
this.menu.removeAll();
//delete this.menuItem;
}
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let popup = this._createPopup(item['popup']);
if (popup !== null && menuOpen)
this.menu.open(true);
}
this.onClick = hash_get(item, 'on-click', this.onClick);
this.onDblClick = hash_get(item, 'on-dblclick', this.onDblClick);
this.onRightClick = hash_get(item, 'on-rightclick', this.onRightClick);
this.onRightDblClick = hash_get(item, 'on-rightdblclick', this.onRightDblClick);
this.onEnter = hash_get(item, 'on-enter', this.onEnter);
this.onLeave = hash_get(item, 'on-leave', this.onLeave);
this.onScroll = hash_get(item, 'on-scroll', this.onScroll);
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}
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openPopup() {
this.menu.open(true);
}
closePopup() {
this.menu.close();
}
togglePopup() {
this.menu.toggle();
}
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destroy() {
this.menu.close();
super.destroy();
}
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});
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// From https://github.com/ubuntu/gnome-shell-extension-appindicator/blob/master/interfaces.js
// loads a xml file into an in-memory string
function loadInterfaceXml(filename) {
let extension = imports.misc.extensionUtils.getCurrentExtension();
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let interfacesDir = extension.dir.get_child('.');
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let file = interfacesDir.get_child(filename);
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let [result, contents] = imports.gi.GLib.file_get_contents(file.get_path());
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if (result) {
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// HACK: The "" + trick is important as hell because file_get_contents returns
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// an object (WTF?) but Gio.makeProxyWrapper requires `typeof() == "string"`
// Otherwise, it will try to check `instanceof XML` and fail miserably because there
// is no `XML` on very recent SpiderMonkey releases (or, if SpiderMonkey is old enough,
// will spit out a TypeError soon).
if (contents instanceof Uint8Array)
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contents = imports.byteArray.toString(contents);
let res = `<node>${contents}</node>`;
return res;
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} else {
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throw new Error(`Generic monitor: Could not load file: ${filename}`);
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}
}
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class GenericMonitorDBUS {
constructor() {
this.monitor_groups = {};
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this.actor_clicked = {};
this.ClutterSettings = Clutter.Settings.get_default();
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this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(loadInterfaceXml('dbus.xml'), this);
this._dbusImpl.export(Gio.DBus.session, '/com/soutade/GenericMonitor');
this._dbusImpl.emit_signal('onActivate', null);
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}
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emit_signal(name, value) {
this._dbusImpl.emit_signal(name, GLib.Variant.new('(s)',[value]));
}
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_checkParameters(parameters) {
if (!parameters.hasOwnProperty('group')) {
log('No group defined');
return false;
}
if (!parameters.hasOwnProperty('items')) {
log('No items defined');
return false;
}
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for (let itemIndex in parameters['items']) {
let item = parameters['items'][itemIndex];
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if (!item.hasOwnProperty('name')) {
log('No name defined for item');
return false;
}
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}
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return true;
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}
_getItemFromGroup(group, name) {
for (let groupItemIndex in group) {
let groupItem = group[groupItemIndex];
if (groupItem.name === name)
return groupItem;
}
return null;
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}
_getItemFromFullName(fullname) {
let splitName = fullname.split('@');
if (splitName.length !== 2) {
log(`Invalid name ${item}`);
return null;
}
if (!this.monitor_groups.hasOwnProperty(splitName[1]))
return null;
return this._getItemFromGroup(this.monitor_groups[splitName[1]], splitName[0]);
}
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_removeFromArray(array, value) {
for(let i=0; i<array.length; i++) {
if (array[i] === value) {
array.splice(i, 1);
if (array === null)
array = [];
break;
}
}
return array;
}
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notify(str) {
let parameters = JSON.parse(str);
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if (!this._checkParameters(parameters))
return;
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let groupName = parameters['group'];
let group;
if (!this.monitor_groups.hasOwnProperty(groupName)) {
group = [];
this.monitor_groups[groupName] = group;
} else {
group = this.monitor_groups[groupName];
}
for (let itemIndex in parameters['items']) {
let item = parameters['items'][itemIndex];
let monitorWidget = this._getItemFromGroup(group, item['name']);
// New widget
if (monitorWidget === null) {
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let position = group.length - 1;
// Find real position
if (position != -1) {
let lastWidget = group[position].container;
let childrens = lastWidget.get_parent().get_children();
for(;position < childrens.length; position++)
{
if (childrens[position] == lastWidget) {
position++;
break;
}
}
if (position >= childrens.length)
position = -1;
}
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monitorWidget = new MonitorWidget(item, groupName, this, position);
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group.push(monitorWidget);
} else {
monitorWidget.update(item);
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}
}
}
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deleteItem(item, groupName) {
let group = this.monitor_groups[groupName];
group = this._removeFromArray(group, item);
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item.destroy();
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if (group.length === 0)
delete this.monitor_groups[groupName];
else
this.monitor_groups = group;
}
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deleteItems(str) {
let parameters = JSON.parse(str);
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if (!parameters.hasOwnProperty('items')) {
log('No items defined');
return false;
}
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for (let itemIndex in parameters['items']) {
let itemName = parameters['items'][itemIndex];
let splitName = itemName.split('@');
if (splitName.length !== 2) {
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log(`Invalid name ${itemName}`);
return false;
}
itemName = splitName[0];
let groupName = splitName[1];
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if (!this.monitor_groups.hasOwnProperty(groupName))
continue;
let group = this.monitor_groups[groupName];
let item = this._getItemFromGroup(group, itemName);
if (item !== null) {
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this.deleteItem(item, groupName);
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}
}
}
deleteGroups(str) {
let parameters = JSON.parse(str);
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if (!parameters.hasOwnProperty('groups')) {
log('No groups defined');
return false;
}
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let groupsToDelete = [];
for (let groupIndex in parameters['groups']) {
let groupName = parameters['groups'][groupIndex];
if (!this.monitor_groups.hasOwnProperty(groupName))
continue;
let group = this.monitor_groups[groupName];
for (let itemIndex in group)
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group[itemIndex].destroy();
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groupsToDelete.push(groupName);
}
for (let groupDeleteIndex in groupsToDelete) {
let groupName = groupsToDelete[groupDeleteIndex];
delete this.monitor_groups[groupName];
}
}
_popupFunction(str) {
let parameters = JSON.parse(str);
if (!parameters.hasOwnProperty('item')) {
log('No item defined');
return false;
}
let monitorWidget = this._getItemFromFullName(parameters['item']);
if (monitorWidget !== null)
return monitorWidget;
else
log(`Item ${str} not found`);
return null;
}
openPopup(str) {
let monitorWidget = this._popupFunction(str)
if (monitorWidget !== null)
monitorWidget.openPopup();
}
closePopup(str) {
let monitorWidget = this._popupFunction(str)
if (monitorWidget !== null)
monitorWidget.closePopup();
}
togglePopup(str) {
let monitorWidget = this._popupFunction(str)
if (monitorWidget !== null)
monitorWidget.togglePopup();
}
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destructor() {
this._dbusImpl.emit_signal('onDeactivate', null);
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for (let groupIndex in this.monitor_groups) {
let group = this.monitor_groups[groupIndex];
for (let itemIndex in group)
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group[itemIndex].destroy();
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}
this.monitor_groups = {};
this._dbusImpl.unexport();
}
}
class Extension {
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enable() {
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this.textDBusService = new GenericMonitorDBUS();
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}
disable() {
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this.textDBusService.destructor();
delete this.textDBusService;
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}
}
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let extension = new Extension();
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function init() {
}
function enable() {
extension.enable();
}
function disable() {
extension.disable();
}