1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 var EXPORTED_SYMBOLS = [
8 "getDictionaryContentPref",
11 const SPELL_CHECK_ENDED_TOPIC = "inlineSpellChecker-spellCheck-ended";
12 const SPELL_CHECK_STARTED_TOPIC = "inlineSpellChecker-spellCheck-started";
14 const CP = Cc["@mozilla.org/content-pref/service;1"].getService(
15 Ci.nsIContentPrefService2
19 * Waits until spell checking has stopped on the given element.
21 * When a spell check is pending, this waits indefinitely until the spell check
22 * ends. When a spell check is not pending, it waits a small number of turns of
23 * the event loop: if a spell check begins, it resumes waiting indefinitely for
24 * the end, and otherwise it stops waiting and calls the callback.
26 * This this can therefore trap spell checks that have not started at the time
27 * of calling, spell checks that have already started, multiple consecutive
28 * spell checks, and the absence of spell checks altogether.
30 * @param editableElement The element being spell checked.
31 * @param callback Called when spell check has completed or enough turns
32 * of the event loop have passed to determine it has not
35 function maybeOnSpellCheck(editableElement, callback) {
36 let editor = editableElement.editor;
38 let win = editableElement.ownerGlobal;
39 editor = win.docShell.editingSession.getEditorForWindow(win);
42 throw new Error("Unable to find editor for element " + editableElement);
46 // False is important here. Pass false so that the inline spell checker
47 // isn't created if it doesn't already exist.
48 var isc = editor.getInlineSpellChecker(false);
50 // getInlineSpellChecker throws if spell checking is not enabled instead of
51 // just returning null, which seems kind of lame. (Spell checking is not
52 // enabled on Android.) The point here is only to determine whether spell
53 // check is pending, and if getInlineSpellChecker throws, then it's not
56 let waitingForEnded = isc && isc.spellCheckPending;
59 function observe(subj, topic, data) {
64 let expectedTopic = waitingForEnded
65 ? SPELL_CHECK_ENDED_TOPIC
66 : SPELL_CHECK_STARTED_TOPIC;
67 if (topic != expectedTopic) {
68 Cu.reportError("Expected " + expectedTopic + " but got " + topic + "!");
70 waitingForEnded = !waitingForEnded;
73 // eslint-disable-next-line mozilla/use-services
74 let os = Cc["@mozilla.org/observer-service;1"].getService(
77 os.addObserver(observe, SPELL_CHECK_STARTED_TOPIC);
78 os.addObserver(observe, SPELL_CHECK_ENDED_TOPIC);
80 let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
83 // Wait an arbitrarily large number -- 100 -- turns of the event loop before
84 // declaring that no spell checks will start.
85 if (waitingForEnded || ++count < 100) {
89 os.removeObserver(observe, SPELL_CHECK_STARTED_TOPIC);
90 os.removeObserver(observe, SPELL_CHECK_ENDED_TOPIC);
94 Ci.nsITimer.TYPE_REPEATING_SLACK
99 * Waits until spell checking has stopped on the given element.
101 * @param editableElement The element being spell checked.
102 * @param callback Called when spell check has completed or enough turns
103 * of the event loop have passed to determine it has not
106 function onSpellCheck(editableElement, callback) {
107 const { TestUtils } = ChromeUtils.import(
108 "resource://testing-common/TestUtils.jsm"
111 let editor = editableElement.editor;
112 TestUtils.topicObserved(SPELL_CHECK_ENDED_TOPIC, s => s == editor).then(
117 async function getDictionaryContentPref() {
118 let dictionaries = await new Promise(resolve => {
120 CP.getByDomainAndName("mochi.test", "spellcheck.lang", null, {