bacfdbbb03
ES6 finally adds standard class syntax to the language, so we can replace our custom Lang.Class framework with the new syntax. Any classes that inherit from GObject will need special treatment, so limit the port to regular javascript classes for now. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/361
110 lines
3.0 KiB
JavaScript
110 lines
3.0 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
|
|
|
|
const Signals = imports.signals;
|
|
const Clutter = imports.gi.Clutter;
|
|
const Params = imports.misc.params;
|
|
|
|
var DEFAULT_LIMIT = 512;
|
|
|
|
var HistoryManager = class {
|
|
constructor(params) {
|
|
params = Params.parse(params, { gsettingsKey: null,
|
|
limit: DEFAULT_LIMIT,
|
|
entry: null });
|
|
|
|
this._key = params.gsettingsKey;
|
|
this._limit = params.limit;
|
|
|
|
this._historyIndex = 0;
|
|
if (this._key) {
|
|
this._history = global.settings.get_strv(this._key);
|
|
global.settings.connect('changed::' + this._key,
|
|
this._historyChanged.bind(this));
|
|
|
|
} else {
|
|
this._history = [];
|
|
}
|
|
|
|
this._entry = params.entry;
|
|
|
|
if (this._entry) {
|
|
this._entry.connect('key-press-event',
|
|
this._onEntryKeyPress.bind(this));
|
|
}
|
|
}
|
|
|
|
_historyChanged() {
|
|
this._history = global.settings.get_strv(this._key);
|
|
this._historyIndex = this._history.length;
|
|
}
|
|
|
|
_setPrevItem(text) {
|
|
if (this._historyIndex <= 0)
|
|
return false;
|
|
|
|
if (text)
|
|
this._history[this._historyIndex] = text;
|
|
this._historyIndex--;
|
|
this._indexChanged();
|
|
return true;
|
|
}
|
|
|
|
_setNextItem(text) {
|
|
if (this._historyIndex >= this._history.length)
|
|
return false;
|
|
|
|
if (text)
|
|
this._history[this._historyIndex] = text;
|
|
this._historyIndex++;
|
|
this._indexChanged();
|
|
return true;
|
|
}
|
|
|
|
lastItem() {
|
|
if (this._historyIndex != this._history.length) {
|
|
this._historyIndex = this._history.length;
|
|
this._indexChanged();
|
|
}
|
|
|
|
return this._historyIndex ? this._history[this._historyIndex -1] : null;
|
|
}
|
|
|
|
addItem(input) {
|
|
if (this._history.length == 0 ||
|
|
this._history[this._history.length - 1] != input) {
|
|
|
|
this._history = this._history.filter(entry => entry != input);
|
|
this._history.push(input);
|
|
this._save();
|
|
}
|
|
this._historyIndex = this._history.length;
|
|
}
|
|
|
|
_onEntryKeyPress(entry, event) {
|
|
let symbol = event.get_key_symbol();
|
|
if (symbol == Clutter.KEY_Up) {
|
|
return this._setPrevItem(entry.get_text());
|
|
} else if (symbol == Clutter.KEY_Down) {
|
|
return this._setNextItem(entry.get_text());
|
|
}
|
|
return Clutter.EVENT_PROPAGATE;
|
|
}
|
|
|
|
_indexChanged() {
|
|
let current = this._history[this._historyIndex] || '';
|
|
this.emit('changed', current);
|
|
|
|
if (this._entry)
|
|
this._entry.set_text(current);
|
|
}
|
|
|
|
_save() {
|
|
if (this._history.length > this._limit)
|
|
this._history.splice(0, this._history.length - this._limit);
|
|
|
|
if (this._key)
|
|
global.settings.set_strv(this._key, this._history);
|
|
}
|
|
};
|
|
Signals.addSignalMethods(HistoryManager.prototype);
|