70 lines
2.0 KiB
JavaScript
70 lines
2.0 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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/* exported loadInterfaceXML, loadSubInterfaceXML */
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const Config = imports.misc.config;
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const Gio = imports.gi.Gio;
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const GLib = imports.gi.GLib;
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let _ifaceResource = null;
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/**
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* @private
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*/
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function _ensureIfaceResource() {
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if (_ifaceResource)
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return;
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// don't use global.datadir so the method is usable from tests/tools
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let dir = GLib.getenv('GNOME_SHELL_DATADIR') || Config.PKGDATADIR;
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let path = `${dir}/gnome-shell-dbus-interfaces.gresource`;
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_ifaceResource = Gio.Resource.load(path);
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_ifaceResource._register();
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}
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/**
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* @param {string} iface the interface name
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* @returns {string | null} the XML string or null if it is not found
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*/
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function loadInterfaceXML(iface) {
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_ensureIfaceResource();
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let uri = `resource:///org/gnome/shell/dbus-interfaces/${iface}.xml`;
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let f = Gio.File.new_for_uri(uri);
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try {
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let [ok_, bytes] = f.load_contents(null);
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return new TextDecoder().decode(bytes);
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} catch (e) {
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log(`Failed to load D-Bus interface ${iface}`);
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}
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return null;
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}
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/**
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* @param {string} iface the interface name
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* @param {string} ifaceFile the interface filename
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* @returns {string | null} the XML string or null if it is not found
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*/
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function loadSubInterfaceXML(iface, ifaceFile) {
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let xml = loadInterfaceXML(ifaceFile);
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if (!xml)
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return null;
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let ifaceStartTag = `<interface name="${iface}">`;
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let ifaceStopTag = '</interface>';
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let ifaceStartIndex = xml.indexOf(ifaceStartTag);
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let ifaceEndIndex = xml.indexOf(ifaceStopTag, ifaceStartIndex + 1) + ifaceStopTag.length;
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let xmlHeader = '<!DOCTYPE node PUBLIC\n' +
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'\'-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\'\n' +
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'\'http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\'>\n' +
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'<node>\n';
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let xmlFooter = '</node>';
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return (
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xmlHeader +
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xml.substr(ifaceStartIndex, ifaceEndIndex - ifaceStartIndex) +
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xmlFooter);
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}
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