зеркало из https://github.com/mozilla/gecko-dev.git
60 строки
2.0 KiB
JavaScript
60 строки
2.0 KiB
JavaScript
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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function ItemPinHelper(aUnpinnedPrefName) {
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this._prefKey = aUnpinnedPrefName;
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}
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// Cache preferences on a static variable shared
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// by all instances registered to the same pref key.
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ItemPinHelper._prefValue = {};
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ItemPinHelper.prototype = {
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_getPrefValue: function _getPrefValue() {
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if (ItemPinHelper._prefValue[this._prefKey])
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return ItemPinHelper._prefValue[this._prefKey];
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try {
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// getComplexValue throws if pref never set. Really.
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let prefValue = Services.prefs.getComplexValue(this._prefKey, Ci.nsISupportsString);
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ItemPinHelper._prefValue[this._prefKey] = JSON.parse(prefValue.data);
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} catch(e) {
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ItemPinHelper._prefValue[this._prefKey] = [];
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}
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return ItemPinHelper._prefValue[this._prefKey];
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},
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_setPrefValue: function _setPrefValue(aNewValue) {
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let stringified = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
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stringified.data = JSON.stringify(aNewValue);
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Services.prefs.setComplexValue(this._prefKey, Ci.nsISupportsString, stringified);
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ItemPinHelper._prefValue[this._prefKey] = aNewValue;
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},
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isPinned: function isPinned(aItemId) {
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// Bookmarks are visible on StartUI (pinned) by default
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return this._getPrefValue().indexOf(aItemId) === -1;
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},
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setUnpinned: function setPinned(aItemId) {
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let unpinned = this._getPrefValue();
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unpinned.push(aItemId);
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this._setPrefValue(unpinned);
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},
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setPinned: function unsetPinned(aItemId) {
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let unpinned = this._getPrefValue();
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let index = unpinned.indexOf(aItemId);
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unpinned.splice(index, 1);
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this._setPrefValue(unpinned);
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},
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}
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