gnome-shell/js/misc/keyboardManager.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const GLib = imports.gi.GLib;
const GnomeDesktop = imports.gi.GnomeDesktop;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Main = imports.ui.main;
const DEFAULT_LOCALE = 'en_US';
const DEFAULT_LAYOUT = 'us';
const DEFAULT_VARIANT = '';
let _xkbInfo = null;
function getXkbInfo() {
if (_xkbInfo == null)
_xkbInfo = new GnomeDesktop.XkbInfo();
return _xkbInfo;
}
let _keyboardManager = null;
function getKeyboardManager() {
if (_keyboardManager == null)
_keyboardManager = new KeyboardManager();
return _keyboardManager;
}
function releaseKeyboard() {
if (Main.modalCount > 0)
global.display.unfreeze_keyboard(global.get_current_time());
else
global.display.ungrab_keyboard(global.get_current_time());
}
function holdKeyboard() {
global.display.freeze_keyboard(global.get_current_time());
}
const KeyboardManager = new Lang.Class({
Name: 'KeyboardManager',
// The XKB protocol doesn't allow for more that 4 layouts in a
// keymap. Wayland doesn't impose this limit and libxkbcommon can
// handle up to 32 layouts but since we need to support X clients
// even as a Wayland compositor, we can't bump this.
MAX_LAYOUTS_PER_GROUP: 4,
_init: function() {
this._xkbInfo = getXkbInfo();
this._current = null;
this._localeLayoutInfo = this._getLocaleLayout();
this._layoutInfos = {};
},
_applyLayoutGroup: function(group) {
let options = this._buildOptionsString();
let [layouts, variants] = this._buildGroupStrings(group);
Meta.get_backend().set_keymap(layouts, variants, options);
},
_applyLayoutGroupIndex: function(idx) {
Meta.get_backend().lock_layout_group(idx);
},
apply: function(id) {
let info = this._layoutInfos[id];
if (!info)
return;
if (this._current && this._current.group == info.group) {
if (this._current.groupIndex != info.groupIndex)
this._applyLayoutGroupIndex(info.groupIndex);
} else {
this._applyLayoutGroup(info.group);
this._applyLayoutGroupIndex(info.groupIndex);
}
this._current = info;
},
reapply: function() {
if (!this._current)
return;
this._applyLayoutGroup(this._current.group);
this._applyLayoutGroupIndex(this._current.groupIndex);
},
setUserLayouts: function(ids) {
this._current = null;
this._layoutInfos = {};
for (let i = 0; i < ids.length; ++i) {
let [found, , , _layout, _variant] = this._xkbInfo.get_layout_info(ids[i]);
if (found)
this._layoutInfos[ids[i]] = { id: ids[i], layout: _layout, variant: _variant };
}
let i = 0;
let group = [];
for (let id in this._layoutInfos) {
// We need to leave one slot on each group free so that we
// can add a layout containing the symbols for the
// language used in UI strings to ensure that toolkits can
// handle mnemonics like Alt+Ф even if the user is
// actually typing in a different layout.
let groupIndex = i % (this.MAX_LAYOUTS_PER_GROUP - 1);
if (groupIndex == 0)
group = [];
let info = this._layoutInfos[id];
group[groupIndex] = info;
info.group = group;
info.groupIndex = groupIndex;
i += 1;
}
},
_getLocaleLayout: function() {
let locale = GLib.get_language_names()[0];
if (locale.indexOf('_') == -1)
locale = DEFAULT_LOCALE;
let [found, , id] = GnomeDesktop.get_input_source_from_locale(locale);
if (!found)
[, , id] = GnomeDesktop.get_input_source_from_locale(DEFAULT_LOCALE);
let _layout, _variant;
[found, , , _layout, _variant] = this._xkbInfo.get_layout_info(id);
if (found)
return { layout: _layout, variant: _variant };
else
return { layout: DEFAULT_LAYOUT, variant: DEFAULT_VARIANT };
},
_buildGroupStrings: function(_group) {
let group = _group.concat(this._localeLayoutInfo);
let layouts = group.map(function(g) { return g.layout; }).join(',');
let variants = group.map(function(g) { return g.variant; }).join(',');
return [layouts, variants];
},
setKeyboardOptions: function(options) {
this._xkbOptions = options;
},
_buildOptionsString: function() {
let options = this._xkbOptions.join(',');
return options;
}
});