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-rw-r--r--js/misc/keyboardManager.js159
1 files changed, 159 insertions, 0 deletions
diff --git a/js/misc/keyboardManager.js b/js/misc/keyboardManager.js
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+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported getKeyboardManager, holdKeyboard, releaseKeyboard */
+
+const { GLib, GnomeDesktop } = imports.gi;
+
+const Main = imports.ui.main;
+
+var DEFAULT_LOCALE = 'en_US';
+var DEFAULT_LAYOUT = 'us';
+var 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());
+}
+
+var KeyboardManager = class {
+ constructor() {
+ // 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.
+ this.MAX_LAYOUTS_PER_GROUP = 4;
+
+ this._xkbInfo = getXkbInfo();
+ this._current = null;
+ this._localeLayoutInfo = this._getLocaleLayout();
+ this._layoutInfos = {};
+ this._currentKeymap = null;
+ }
+
+ _applyLayoutGroup(group) {
+ let options = this._buildOptionsString();
+ let [layouts, variants] = this._buildGroupStrings(group);
+
+ if (this._currentKeymap &&
+ this._currentKeymap.layouts == layouts &&
+ this._currentKeymap.variants == variants &&
+ this._currentKeymap.options == options)
+ return;
+
+ this._currentKeymap = { layouts, variants, options };
+ global.backend.set_keymap(layouts, variants, options);
+ }
+
+ _applyLayoutGroupIndex(idx) {
+ global.backend.lock_layout_group(idx);
+ }
+
+ apply(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() {
+ if (!this._current)
+ return;
+
+ this._applyLayoutGroup(this._current.group);
+ this._applyLayoutGroupIndex(this._current.groupIndex);
+ }
+
+ setUserLayouts(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+ะค 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() {
+ let locale = GLib.get_language_names()[0];
+ if (!locale.includes('_'))
+ 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(_group) {
+ let group = _group.concat(this._localeLayoutInfo);
+ let layouts = group.map(g => g.layout).join(',');
+ let variants = group.map(g => g.variant).join(',');
+ return [layouts, variants];
+ }
+
+ setKeyboardOptions(options) {
+ this._xkbOptions = options;
+ }
+
+ _buildOptionsString() {
+ let options = this._xkbOptions.join(',');
+ return options;
+ }
+};