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extension.js
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311
extension.js
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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 3 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-3.0-or-later
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*/
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/* Based on https://stackoverflow.com/questions/33001192/how-to-send-a-string-to-a-gnome-shell-extension */
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const St = imports.gi.St;
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const Gio = imports.gi.Gio;
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const Lang = imports.lang;
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const Main = imports.ui.main;
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class MonitorWidget {
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constructor(name, group, text, style, icon, iconStyle) {
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this.name = name;
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this.group = group;
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this._createIcon(icon, iconStyle);
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this._createText(text, style);
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}
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_createText(text, style)
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{
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this.style = style;
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if (text == "")
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this.widget = null;
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else
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{
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this.widget = new St.Button({ label: text});
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this.widget.set_style(this.style);
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}
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}
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_createIcon(icon, style)
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{
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this.iconStyle = style;
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if (icon == "")
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this.icon = null;
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else
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{
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let gicon = Gio.icon_new_for_string(icon);
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this.icon = new St.Icon({ gicon });
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this.icon.set_style(this.iconStyle);
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}
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}
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update(text, style, icon, iconStyle)
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{
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if (!this.widget)
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this._createText(text, style)
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else
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{
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if (text != "")
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this.widget.label = text;
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this.style = style;
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this.widget.set_style(this.style);
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}
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if (icon != "")
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this._createIcon(icon, iconStyle);
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else
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{
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if (iconStyle != "" && this.icon)
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{
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this.iconStyle = style;
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this.icon.set_style(this.iconStyle);
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}
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}
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}
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}
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// From https://github.com/ubuntu/gnome-shell-extension-appindicator/blob/master/interfaces.js
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// loads a xml file into an in-memory string
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function loadInterfaceXml(filename) {
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let extension = imports.misc.extensionUtils.getCurrentExtension();
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let interfaces_dir = extension.dir.get_child(".")
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let file = interfaces_dir.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"`
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// Otherwise, it will try to check `instanceof XML` and fail miserably because there
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// is no `XML` on very recent SpiderMonkey releases (or, if SpiderMonkey is old enough,
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// will spit out a TypeError soon).
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if (contents instanceof Uint8Array)
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contents = imports.byteArray.toString(contents);
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return "<node>" + contents + "</node>";
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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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}
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const GenericMonitorDBUS = new Lang.Class({
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Name: 'GenericMonitor',
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_init: function() {
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this.monitor_groups = {};
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this.box = Main.panel._centerBox;
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this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(loadInterfaceXml('dbus.xml'), this);
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this._dbusImpl.export(Gio.DBus.session, '/com/soutade/GenericMonitor');
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},
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_checkParmeters: function(parameters)
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{
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if (!parameters.hasOwnProperty("group"))
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throw new Error("No group defined");
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if (!parameters.hasOwnProperty("items"))
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throw new Error("No items defined");
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for (let itemIndex in parameters["items"]) {
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let item = parameters["items"][itemIndex];
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if (!item.hasOwnProperty("name"))
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throw new Error("No name defined for item");
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if (!item.hasOwnProperty("text") && !item.hasOwnProperty("icon"))
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throw new Error("No text not icon defined for item");
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}
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},
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_getItemFromGroup: function(group, name)
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{
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for (let groupItemIndex in group)
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{
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let groupItem = group[groupItemIndex];
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if (groupItem.name == name)
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return groupItem;
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}
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return null;
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},
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notify: function(str) {
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let parameters = JSON.parse(str);
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this._checkParmeters(parameters);
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let groupName = parameters["group"];
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let group;
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if (!this.monitor_groups.hasOwnProperty(groupName))
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{
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group = [];
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this.monitor_groups[groupName] = group;
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}
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else
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group = this.monitor_groups[groupName];
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for (let itemIndex in parameters["items"]) {
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let item = parameters["items"][itemIndex];
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let style = "";
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if (item.hasOwnProperty("style"))
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style = item["style"];
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let text = "";
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if (item.hasOwnProperty("text"))
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text = item["text"];
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let icon = "";
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if (item.hasOwnProperty("icon"))
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icon = item["icon"];
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let iconStyle = "";
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if (item.hasOwnProperty("icon-style"))
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iconStyle = item["icon-style"];
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let monitorWidget = this._getItemFromGroup(group, item["name"]);
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let lastWidget = null;
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// New widget
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if (monitorWidget == null)
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{
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monitorWidget = new MonitorWidget(item["name"], groupName, text, style, icon, iconStyle);
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if (group.length)
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lastWidget = group[group.length-1].widget;
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group.push(monitorWidget);
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// lastWidget => NULL, insert at the end
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if (monitorWidget.icon)
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{
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this.box.insert_child_above(monitorWidget.icon, lastWidget);
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lastWidget = monitorWidget.icon;
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}
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if (monitorWidget.widget)
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this.box.insert_child_above(monitorWidget.widget, lastWidget);
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}
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else
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{
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let prevWidget = monitorWidget.widget;
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let prevIcon = monitorWidget.icon;
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monitorWidget.update(text, style, icon, iconStyle);
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if (monitorWidget.icon)
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{
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if (prevIcon)
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this.box.remove_child(prevIcon);
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this.box.insert_child_above(monitorWidget.icon, lastWidget);
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lastWidget = monitorWidget.icon;
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}
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if (!prevWidget && monitorWidget.widget)
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this.box.insert_child_above(monitorWidget.widget, lastWidget);
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}
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}
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},
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_removeItemFromBox: function(item) {
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if (item.widget)
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this.box.remove_child(item.widget);
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if (item.icon)
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this.box.remove_child(item.icon);
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},
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deleteItems: function(str) {
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let parameters = JSON.parse(str);
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if (!parameters.hasOwnProperty("items"))
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throw new Error("No items defined");
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for (let itemIndex in parameters["items"]) {
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let itemName = parameters["items"][itemIndex];
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let fullName = itemName.split("@");
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if (fullName.length != 2)
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throw new Error("Invalid name " + itemName);
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itemName = fullName[0];
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let groupName = fullName[1];
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if (!this.monitor_groups.hasOwnProperty(groupName))
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continue;
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let group = this.monitor_groups[groupName];
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let item = this._getItemFromGroup(group, itemName);
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if (item != null)
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{
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this._removeItemFromBox(item);
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delete group[item["name"]];
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if (group.length == 0)
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delete this.monitor_groups[groupName];
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}
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}
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},
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deleteGroups: function(str) {
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let parameters = JSON.parse(str);
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if (!parameters.hasOwnProperty("groups"))
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throw new Error("No groups defined");
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let groupsToDelete = [];
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for (let groupIndex in parameters["groups"]) {
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groupName = parameters["groups"][groupIndex];
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if (!this.monitor_groups.hasOwnProperty(groupName))
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continue;
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let group = this.monitor_groups[groupName];
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for (let itemIndex in group) {
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this._removeItemFromBox(group[itemIndex]);
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}
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groupsToDelete.push(groupName);
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}
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for(let groupDeleteIndex in groupsToDelete)
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{
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let groupName = groupsToDelete[groupDeleteIndex];
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delete this.monitor_groups[groupName];
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}
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},
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deleteAll: function() {
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for (let groupIndex in this.monitor_groups) {
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let group = this.monitor_groups[groupIndex];
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for (let itemIndex in group) {
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this._removeItemFromBox(group[itemIndex]);
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}
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}
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this.monitor_groups = {}
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},
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});
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class Extension {
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constructor() {
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this.textDBusService = new GenericMonitorDBUS();
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}
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enable() {
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}
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disable() {
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this.textDBusService.deleteAll();
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}
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}
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let extension = null;
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function init() {
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extension = new Extension();
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}
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function enable() {
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extension.enable();
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}
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function disable() {
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extension.disable();
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}
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