/usr/share/gjs-1.0/overrides/GLib.js is in libgjs0c 1.32.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright 2011 Giovanni Campagna
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
let GLib;
let originalVariantClass;
const SIMPLE_TYPES = ['b', 'y', 'n', 'q', 'i', 'u', 'x', 't', 'h', 'd', 's', 'o', 'g'];
function _read_single_type(signature, forceSimple) {
let char = signature.shift();
let isSimple = false;
if (SIMPLE_TYPES.indexOf(char) == -1) {
if (forceSimple)
throw new TypeError('Invalid GVariant signature (a simple type was expected)');
} else
isSimple = true;
if (char == 'm' || char == 'a')
return [char].concat(_read_single_type(signature, false));
if (char == '{') {
let key = _read_single_type(signature, true);
let val = _read_single_type(signature, false);
let close = signature.shift();
if (close != '}')
throw new TypeError('Invalid GVariant signature for type DICT_ENTRY (expected "}"');
return [char].concat(key, val, close);
}
if (char == '(') {
let res = [char];
while (true) {
if (signature.length == 0)
throw new TypeError('Invalid GVariant signature for type TUPLE (expected ")")');
let next = signature[0];
if (next == ')') {
signature.shift();
return res.concat(next);
}
let el = _read_single_type(signature);
res = res.concat(el);
}
}
// Valid types are simple types, arrays, maybes, tuples, dictionary entries and variants
if (!isSimple && char != 'v')
throw new TypeError('Invalid GVariant signature (' + char + ' is not a valid type)');
return [char];
}
function _pack_variant(signature, value) {
if (signature.length == 0)
throw new TypeError('GVariant signature cannot be empty');
let char = signature.shift();
switch (char) {
case 'b':
return GLib.Variant.new_boolean(value);
case 'y':
return GLib.Variant.new_byte(value);
case 'n':
return GLib.Variant.new_int16(value);
case 'q':
return GLib.Variant.new_uint16(value);
case 'i':
return GLib.Variant.new_int32(value);
case 'u':
return GLib.Variant.new_uint32(value);
case 'x':
return GLib.Variant.new_int64(value);
case 't':
return GLib.Variant.new_uint64(value);
case 'h':
return GLib.Variant.new_handle(value);
case 'd':
return GLib.Variant.new_double(value);
case 's':
return GLib.Variant.new_string(value);
case 'o':
return GLib.Variant.new_object_path(value);
case 'g':
return GLib.Variant.new_signature(value);
case 'v':
return GLib.Variant.new_variant(value);
case 'm':
if (value != null)
return GLib.Variant.new_maybe(null, _pack_variant(signature, value))
else
return GLib.Variant.new_maybe(GLib.VariantType.new(_read_single_type(signature, false).join('')), null);
case 'a':
let arrayType = _read_single_type(signature, false);
if (arrayType[0] == 's') {
// special case for array of strings
return GLib.Variant.new_strv(value, value.length);
}
if (arrayType[0] == 'y') {
// special case for array of bytes
return GLib.Variant.new_bytestring(value);
}
if (arrayType[0] == 'a' && arrayType[1] == 'y') {
// special case for array of array of bytes
return GLib.Variant.new_bytestring_array(value, value.length);
}
let arrayValue = [];
if (arrayType[0] == '{') {
// special case for dictionaries
for (let key in value) {
let copy = [].concat(arrayType);
let child = _pack_variant(copy, [key, value[key]]);
arrayValue.push(child);
}
} else {
for (let i = 0; i < value.length; i++) {
let copy = [].concat(arrayType);
let child = _pack_variant(copy, value[i]);
arrayValue.push(child);
}
}
return GLib.Variant.new_array(GLib.VariantType.new(arrayType.join('')), arrayValue, arrayValue.length);
case '(':
let children = [ ];
for (let i = 0; i < value.length; i++) {
let next = signature[0];
if (next == ')')
break;
children.push(_pack_variant(signature, value[i]));
}
if (signature[0] != ')')
throw new TypeError('Invalid GVariant signature for type TUPLE (expected ")")');
signature.shift();
return GLib.Variant.new_tuple(children, children.length);
case '{':
let key = _pack_variant(signature, value[0]);
let child = _pack_variant(signature, value[1]);
if (signature[0] != '}')
throw new TypeError('Invalid GVariant signature for type DICT_ENTRY (expected "}")');
signature.shift();
return GLib.Variant.new_dict_entry(key, child);
default:
throw new TypeError('Invalid GVariant signature (unexpected character ' + char + ')');
}
}
function _unpack_variant(variant, deep) {
switch (String.fromCharCode(variant.classify())) {
case 'b':
return variant.get_boolean();
case 'y':
return variant.get_byte();
case 'n':
return variant.get_int16();
case 'q':
return variant.get_uint16();
case 'i':
return variant.get_int32();
case 'u':
return variant.get_uint32();
case 'x':
return variant.get_int64();
case 't':
return variant.get_uint64();
case 'h':
return variant.get_handle();
case 'd':
return variant.get_double();
case 'o':
case 'g':
case 's':
// g_variant_get_string has length as out argument
return variant.get_string()[0];
case 'v':
return variant.get_variant();
case 'm':
let val = variant.get_maybe();
if (deep)
return _unpack_variant(val, deep);
else
return val;
case 'a':
if (variant.is_of_type(GLib.VariantType.new('a{?*}'))) {
// special case containers
let ret = { };
let nElements = variant.n_children();
for (let i = 0; i < nElements; i++) {
// always unpack the dictionary entry, and always unpack
// the key (or it cannot be added as a key)
let val = _unpack_variant(variant.get_child_value(i), deep);
let key
if (!deep)
key = _unpack_variant(val[0], true);
else
key = val[0];
ret[key] = val[1];
}
return ret;
}
// fall through
case '(':
case '{':
let ret = [ ];
let nElements = variant.n_children();
for (let i = 0; i < nElements; i++) {
let val = variant.get_child_value(i);
if (deep)
ret.push(_unpack_variant(val, deep));
else
ret.push(val);
}
return ret;
}
throw new Error('Assertion failure: this code should not be reached');
}
function _init() {
// this is imports.gi.GLib
GLib = this;
this.Variant.new = function (sig, value) {
let signature = Array.prototype.slice.call(sig);
let variant = _pack_variant(signature, value);
if (signature.length != 0)
throw new TypeError('Invalid GVariant signature (more than one single complete type)');
return variant;
}
this.Variant.prototype.unpack = function() {
return _unpack_variant(this, false);
}
this.Variant.prototype.deep_unpack = function() {
return _unpack_variant(this, true);
}
this.Variant.prototype.toString = function() {
return '[object variant of type "' + this.get_type_string() + '"]';
}
}
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